Abstract: An insulated register box apparatus with a boot rail adapter has a register box, an insulating material affixed within the register box, a rail affixed to a side panel of the register box, and a rail guide having a slot that receives a section of the rail therein. The rail guide is adapted to be affixed to a supporting surface. The rail is affixed to at least one of the side panels of the register box. The rail is slidable relative to the rail guide. The register box has a plurality of side panels and a duct that opens to an interior of the plurality of side panels. The insulating material extends inwardly of the plurality of side panels.

Abstract: A downhole liner delivery tool includes a housing configured to couple to a tubular work string. The housing includes an interior volume. The tool also includes a liner store enclosed within the interior volume. The liner store is configured to enclose at least a portion of a wellbore liner that includes a flexible membrane. The flexible membrane includes an imbedded epoxy. The tool also includes a hydraulic circulation system arranged in at least a portion of the interior volume and configured to circulate a fluid to expand the wellbore liner from the liner store to an exterior of the housing to contactingly engage a wellbore wall.

Abstract: To construct an underground cable line in-situ, cut and immediately evacuate a void in the existing covering surface. Next, lay or apply cable(s) into the void. Then, flow a non-shrinking composition into a portion of the void around the cable to fill a portion of the void. Upon rigidification the cable is encased in the void by the non-shrinking composition. Last, apply a topping material to the exposed surface of the composition in such volume as to fill any remaining portion of the void.

Abstract: A method of producing a concrete pipeline in an area where the pipeline is to be laid has the steps of making a trench, installing in the trench a cylindrical elastic element with a diameter equal to an inner diameter of the pipeline to be laid' placing armature on the cylindrical elastic element, pouring a liquid concrete solution on the element with the armature and hardening the concrete solution, after the hardening of the concrete solution turning a part of the element inside out, placing a reinforcing on a thusly obtained portion of the element with turned part, pouring a concrete solution again onto the portion of the element with the armature.

Abstract: A cementitious mixture that is comprised of class C fly ash and other industrial waste product such as either bottom ash or economizer ash. The mixture is preferably 15-35% weight class C fly ash based on the total weight of the mixture. The mixture excludes Portland cement, or other similar cement products. The dry mixture is placed in a desired location or form. Water is then added to the mixture when desired in order to harden the mixture in place. The cementitious mixture is particularly useful for securing fence posts, or the like, in the earth as the workability of the mixture is maintained by adding the water to the mixture only after the position has been properly plumbed and placed in the hole. The cementitious mixture thus provides an inexpensive alternative to standard blended cement products, and provides a convenient and effective way of securing fence posts to the earth.

Abstract: A resiliently-mounted through-foundation pipe coupling is provided that is suited for building plumbing applications. The resiliently-mounted coupling assembly is a length of straight plastic pipe preferably with pipe couplings on each end. The combined length of the pipe and associated couplings is selected to roughly match the thickness of the foundation. The combined pipe and associated couplings are covered with and bonded to a relatively thick layer of foam rubber elastomeric material. The combination of pipe and elastomeric layer is placed in the desired position in a foundation form before the foundation is poured. The elastomeric layer cushions the plastic pipe from the forces of being cast in place as the foundation is poured, and also provides resilience to the eventually installed piping system (connected to the through-foundation pipe fitting) against the motion of back-filled soil, and against alignment forces and mechanical loading of attached plumbing.

Abstract: Apparatuses and methods are disclosed for mounting conduits within spacers for underground installation. Spacers for side loading of conduit, as opposed to older methods of end loading, allow construction workers to easily assemble conduits to a plurality of spacers above-ground. The side loading technique uses spacers having bores that communicate with each other, preferably in a radial manner. Thus, a first plurality of conduits may be assembled or mounted to an inner portion of the spacers and then at least a second plurality of conduits may be assembled and mounted to an outer portion of the spacers. Cables later pulled through the conduits are typically those used for the transmission of electricity or communication signals. Other embodiments use bores that do not communicate with each other but are secured to the spacers with an outer banding saddle.

Abstract: Device for arresting the propagation of a buckle in a double walled pipe. The device comprising an outer pipe wall having a defined external diameter and placed around an inner pipe wall, defining an annular space between the said outer and inner walls; providing predetermined regions in the annular space which are bounded between two sealing blocks with radially opposed faces which are in contact with the outer and inner pipes; placing a curable compound in each region and curing it the length of each region is at least equal to 0.5 times the external diameter of the outer wall.

Abstract: A hole former for a manhole with an invert, which aligns the hole with the invert such that pipes are properly aligned and will not leak or cause damming when connected to the manhole. The hole former has an alignment member with a central aperture as a part of the hole former or a separate part. The alignment member has a central cylindrical male portion, which fits into a central cylindrical female portion of the hole former to align the hole former and the alignment member. The invert has a tube on the central axis of its pipe portion. A straight bar inserted in the central axis of the alignment member and the tube in the invert aligns the hole former with the invert. When cement is poured over the hole former, the hole formed will be properly aligned to allow a pipe to be connected to the manhole.

Abstract: A process and plant for laying a pipe in a trench comprising placing a flattened tubular preform in the trench, the perform having a reinforcement surrounding an inner seal, the reinforcement being impregnated with a resin, and inflating the perform in the trench.

Abstract: A pipelayer is provided which is capable of effectively transporting pipes or the like and stably carrying out load hoisting operation on a slope. The pipelayer comprises: an undercarriage; an upper revolving superstructure mounted on the undercarriage so as to turn around freely upon the undercarriage; a boom supported by the upper revolving superstructure so as to be freely raised and lowered; a pulley block attached to the boom through a universal joint; a hoist mounted on the upper revolving superstructure; a hoist hook hung by a wire rope that is paid out from the hoist and wound around the pulley block.

Abstract: For transferring a fluid between at least two floating supports or one floating and one fixed support, a rigid hollow transport line is immersed with a cable suspension system in the sea. A flexible connector links each end of the rigid transport line to one of the supports. The entire rigid transport line including its ends is immersed in the sea at a depth which is greater than the turbulent zone of the sea. Each connector provides continuity of oil flow between the two floating supports via the rigid transport line.

Abstract: A method of damping a conductor tube in a guide tube therefor comprises the steps of inserting a bag between the conductor and the jacket and filling the bag with a settable material to provide a resilient layer between the conductor and the guide tube.

Abstract: A stake device for providing support to a structure, including an upper end that includes interface means for transferring torsional force to the support stake to enable an operator to rotate the support stake about a longitudinal axis of the support stake. The stake includes a lower end that includes thread means for threadably engaging ground to allow the support stake to be threaded downwardly into the ground. An elongate intermediate section is disposed between the upper end and lower end and includes at least one opening formed within the intermediate section, said opening running substantially orthogonally to the longitudinal axis of the support stake and being configured to receive a securing device to secure the support device to the structure.

Abstract: A system for carrying electrical energy in connections in underground cables. In particular, it relates to a method of laying cables and a trench filler having a low thermal resistivity, used for laying underground cables for carrying electrical energy. More particularly, it relates to the use of an inert filler to be disposed in an area around the cables or the parts of the system, such as joints, which are disposed underground. The method of laying cables disposed in a trench includes: removing the original soil to prepare the trench; disposing a first layer of a first composition in the trench; disposing the cables on top of the first layer; disposing a second layer of the first composition on top of the cables; disposing a third layer on top of the second layer formed by a second composition to fill the trench. The first composition comprises: 60-90% by weight of crushed sand; 4-15% by weight of silt; 2-12% by weight of cement; and 4-15% by weight of water.

Abstract: For laying synthetic underground piping (1) a ground channel (2) is first bored and the piping (1) is introduced into the ground channel (2). To facilitate laying an underground pipe length particularly effectively, the pipe length (1) comprising a hardening synthetic mass is manufactured at the same time as it is introduced into the ground channel (2) by the prepared synthetic mass being formed continuously inside the ground channel (2) as a run of piping (3) and left to harden.

Abstract: Device for transferring fluid between at least two floating supports of the type comprising a rigid hollow transport line (1) submerged catenary-fashion in the sea, flexible connecting means (10) connecting each end (2,3) of the rigid transport line (1) to one of the said floating supports (4,5), and it is characterized in that the entirety of the rigid transport line (1) including the said ends (2,3) is submerged in the sea to a depth (P1) which is greater than the said turbulent zone, the said connecting means (10) ensuring continuity of flow of the crude between the two floating supports (4,5) via the said rigid transport line.

Abstract: A deeply buried transmission line and a method for installing same wherein the majority of the line is buried at depth (e.g. up to 5000 feet or more) well below conventionally buried lines. This provide much greater security from either accidental or intentional damage to the line. The line is initiated by drilling a wellbore in a downward vertical direction to a first depth (e.g. about 500 feet) from spaced surface points before the respective wellbores are curved into in a horizontal direction towards each other at a second depth (e.g. about 5000 feet) where they ultimately intersect. By drilling a wellbore downward from small, spaced surface plots at either end of the line, only a small surface area is affected during the installation of the line.

Abstract: A process for introducing an optical cable, in the form of a microcable or minicable (1), in solid ground (17) with the aid of a laying unit (23). The microcable or minicable (1) used for this purpose comprises a homogeneous and pressurized-water-tight tube (8) which has an external diameter of from 2.0 to 10 mm and into which optical waveguides (3) are introduced.

Abstract: An optical fiber cable (12) is installed within an enclosure (14) a duct by pushing the cable into the duct via a motorized pushing mechanism (38). As the optical fiber cable enters the enclosure, the image of interior of the enclosure is focused by a lens (22) onto a first end of the optical cable for transmission to the opposite end in which is optical registration with a television camera (24). The television camera captures the image of the enclosure interior for display on a monitor (26) to enable installation personnel to observe any possible narrowing of the enclosure that could impede fiber installation. Upon detecting such a restriction or obstruction narrowing the enclosure, the installation personnel actuate a pair of fingers (28a, 28b) carried by a casing (18) circumscribing the forward end of the optical fiber cable to push outwardly against the interior of the enclosure to reduce the narrowing and facilitate installation of the cable in the enclosure.

Abstract: One or more electric and/or data transmitting cables are confined in an elongated strip-shaped body containing a hardenable resin or the like, and the body is placed against a portion of the internal surface of an underground sewage, water or other pipe. An expandible tubular liner is thereupon introduced into the pipe and is expanded to press the body against the pipe. The body is caused to set, by conveying a hot fluid through the liner and/or by electrically heating the cable or cables, and to adhere to the internal surface of the pipe. The liner can remain in the pipe and can be bonded to the strip-shaped body and/or to the remaining portion of the internal surface of the pipe. Alternatively, the liner is caused to collapse and is withdrawn from the pipe once the strip-shaped body is bonded to the internal surface of the pipe.

Abstract: A material and method is provided for lining man-entry sized pipes and securing the lining to the pipe. The lining comprises a plurality of adjacent, unplasticized polyvinyl chloride panel segments circumferentially curved within the pipe, each including an interior channel through which grout may be injected. Upon the grout's curing, the grout provides strength and support for a second layer of grout injected into an annulus between the pipe's inner surface and an outer surface of the lining.

Abstract: An apparatus adapted for movement through a passage formed in the ground includes an elongate element and means for positioning a shroud around at least part of the elongate element for engagement against the periphery of the passage to provide a space through which the elongate element can move. The shroud is of flexible construction and is arranged to be progressively installed in position as the elongate element moves along the passage. The apparatus is adapted for introducing an inflation fluid into the region between the shroud and the elongate element in order to inflate the shroud and maintain it in engagement against the periphery of the passage.

Abstract: Apparatus adapted for movement through a passage (16) formed in the ground, comprising an elongate element (13) and means for positioning a shroud (20) around at least part of the longitudinal periphery of the elongate element for engagement against the periphery of the passage (16) to provide a space through which the elongate element can move, the shroud (20) being of flexible construction and being arranged to be progressively installed in position as the elongate element (13) moves along the passage, and means for introducing an inflation fluid into the region (90) between the shroud (20) and the elongate element (13) for inflating the shroud (20) and maintaining it in engagement against the periphery of the passage (16).

Abstract: A method and device for on-site producing a cable at the location for placing the cable includes a mobile device supporting an arrangement for forming a protective sheath of the cable and an arrangement for inserting the optical fibers or electrical leads into the sheath and then discharging the sheath into a cable laying position. The device may include an arrangement for forming a trench for receiving the cable, an arrangement for inserting a filling compound into the interior of the sheath as the leads or fibers are introduced therein and means for supplying a filling material for filling the trench subsequent to insertion of the cable therein.

Abstract: A method of operation to effectively excavate an underdrain in the field ground having a long service life and ensuring that the underdrain will not be closed after a long period of time and a device for such operation. The method includes attaching a plurality of buckets to an endless chain, driving the endless chain to excavate a slit in the field ground, reforming inner side walls of the slit by a reformer, pressing soil from both sides of the slit later ally inwardly by a pressing member attached to the reformer to form a block to separate the slit into an upper space and a Iover space, and charging the upper space with discarded dirt.

Abstract: A conduit for the circulation of fluid under pressure comprising a tubular enclosure delimited by a thin wall and fixed on a rigid base slab of molded material. The upper part of the enclosure comprises, in cross-section, at least three thin wall segments, including two lateral segments each extending from a lower side to an upper side, and at least one upper segment closing the enclosure by connecting the upper sides of the lateral segments. Each lateral thin wall segment is joined to a rigid support element of molded material fixed at its base to the corresponding side of the slab and comprising an inner surface conjugate with that of the lateral segment onto which the latter is applied. The inner surface extends from the level of the upper surface of the slab as to a level sufficient to maintain the rigidity of the lateral segment over its entire height.

Abstract: A system and process for relining conveyor lines like pipelines (1) with an internal inliner (2) and an external inliner (preliner 7), whereby the internal inliner (2) forms a stiffened internal pipe (30) after insertion into the external inliner (preliner 7) and the external inliner (preliner 7) is arranged at such a distance from the internal inliner (2) that an open flow section is formed between the internal and external inliners as an inspection chamber to detect and, where necessary, remedy leaks in one of the inliners, alternatively, a system and process with an internal inliner (2), a central inliner (3) and an external inliner (preliner 7) whereby the internal inliner (2) or the latter together with the central inliner (3) form a stiffened internal pipe (38) after insertion in the external inliner and whereby the external inliner (preliner 7) is arranged at such a distance from the central inliner (3) that an open flow cross-section between the central and external in liners is formed as an inspectio

Abstract: The lining of pipelines and passageways is effected by everting a flexible lining tube containing curable synthetic resin into and along the pipeline or passageway. The resin is of the latent type and requires the application of energy to initiate the cure, after which the cure continues. The cure is initiated by applying energy, e.g. ultrasonic, to the everting face via a device which travels in the pipeline or passageway ahead of the everting face. The device is kept centralised and focuses energy on the center of the everting face. As the respective lengths of the lining pass the everting face and lie on the pipeline or passageway surface they cure to hard condition. The process is dynamic and quick.

Abstract: An apparatus and method for inflating and curing a resin impregnated liner include a resin impregnated liner lowered into an underground structure so that a portion of the liner extends beyond the structure. The protruding portion of the liner is then sealed. Pressurized air and steam are simultaneously admitted into the liner so that the liner inflates and engages the structure. Air and steam continue to be admitted into the liner for a period sufficient to cure the resin while maintaining the liner engaged with the structure.

Abstract: An improved thermally insulated, impact and abrasion resistant pipeline and an impact resistant, flexible, cementitious material which maintains low thermal conductivity when submerged and which is suitable for insulating underwater pipelines, said material comprising:hydraulic cement, a closed cell aggregate which exhibits low water absorption under high hydrostatic pressure and a polymeric modifier which increases flexibility and reduces porosity of the cured cementitious material.

Abstract: A liner assembly for a manhole comprises a multiple ply generally cylindrical tube. The outermost ply is adapted for being impregnated with material for rigidifying and bonding the outermost ply to a manhole. The innermost ply is adapted for being impregnated with a material for rigidifying the innermost ply so that the manhole becomes structurally reinforced. An impermeable ply is disposed between the innermost and outermost plies. The outermost, innermost, and impermeable plies are secured together so that the plies are maintained facially oriented. Each of the plies is cut along a first end of the tube for providing a fluid flow path when the assembly is installed in the manhole and an opposite end of the tube is fully opened.

Abstract: To rehabilitate an internally corroded underground pipeline, excavations are made at its opposite ends to which launching and receiving pipe structures are then secured. Various pig member sets, with appropriate treatment fluids carried thereby, are air-driven through the entire length of the pipeline to successively acid clean, etch, and neutralize its interior surface. The interior pipeline surface is then thoroughly dried by flowing dehydrated air through the pipeline. Specially designed leading and trailing extruder pigs, with 100% solid, high viscosity, solvent-free epoxy coating material therebetween, are then air-driven through the pipeline to extrude a first protective coating layer onto its interior surface. The first layer is then dried with dehydrated air.

Abstract: A method of repairing an underground large-diameter pipe having an inner surface includes first supporting with props inside the pipe spaced inward from its inner surface a lining having a shape conforming to that of the inner surface and then injecting a hardenable mass into the space between the inner surface and the lining and substantially completely filling this space with the mass. The mass is then cured and the props are removed. Then the cycle can be repeated for the next lining section. The lining is made of a durable synthetic resin, polyvinylchloride or high-density polyethylene.

Abstract: A fluid-conveying conduit of large cross section for conveying fluid under high pressure, formed by assembling on a laying surface a plurality of prefabricated longitudinal elements placed in sequence and comprising, in transverse section, a lower base and a vault having two lateral edges connected to the base by sealingly joining longitudinal members. The longitudinal joining members consist of two parallel metallic profiled members rigidly connected to one another by at least one crosspiece and fixed to a slab forming the base of the conduit, and the vault consists of at least one thin wall element and is sealingly fixed by its two lateral edges along two longitudinal profiled members.

Abstract: The present invention is a system for the robotic fabrication of a set of parallel pipelines or tunnels along a curvilinear path without limitation as to distance, direction and depth. A large diameter bore is made by a boring unit as the boring unit moves tangentially along the path through the earth. Prefabricated segments of the pipeline body or tunnel body are then installed by the system at a plurality of locations in the bore, such that their axes are instantaneously parallel to each other and to the large diameter bore, as extensions of the duct body already installed. The annular space between the extensions and the large diameter bore is then occasionally filled along the ducts with a composite material thereby supporting the several smaller diameter structurally independent permanent ducts in the large diameter bore. The prefabricated duct segments function as the structural body of the ducts.

Abstract: Mobile continuous tubular structure forming and placing apparatus includes a support portion, a row material supplying portion, a matrix forming portion, a tubular structure forming portion and a control portion. The raw material supplying portion includes a plurality of reservoirs connected independently with the matrix forming portion through conduits. The tubular structure forming portion includes a frame section and an arcuate blanket support associated with the frame section. A blanket transport is disposed adjacent the arcuate blanket support and aligned therewith, the blanket transport being movable from one end of the arcuate blanket support to an opposite end thereof. A plurality of spaced movable finger members are disposed along each longitudinal edge of the arcuate blanket support with interconnectors joining adjacent finger members.

Abstract: A fluid-conveying conduit of large cross section, formed by assembling on a laying surface a plurality of prefabricated longitudinal elements placed in sequence and comprising, in transverse section, a lower base and a vault having two lateral edges connected to the base by sealingly joining longitudinal members, which consist of two parallel metallic profiled members rigidly connected to one another by at least one crosspiece and fixed to a slab forming the base of the conduit, and the vault consists of at least one thin wall element and is sealingly fixed by its two lateral edges along two longitudinal profiled members. The invention applies especially to the construction of conduits for conveying fluid under pressure, for example for water conveyance, urban heating or penstocks.

Abstract: A device for repairing a main (1) can also be used to repair a leaking, corroded section of a branch pipe (2) which opens into the main. The device has a toothed rod (17) which can be extended approximately radially and rotated in the axis of the branch pipe by rotation of a pipe end cover plate (14). A hose (23), which extends from the center of the pipe end cover plate (14), is fastened to the free end of the toothed rod by means of a pipe piece (29). An air bubble (31) is placed on the pipe piece (29) and inflated by compressed air blown through the hose until it becomes lodged in the branch pipe itself. After the air bubble is detached, a cover plate is mounted on the end of the hose and a hardenable material is pumped through the hose into the cavity formed between the cover plate and the air bubble (31).

Abstract: A device for the in situ repair of pipes (e.g. stormwater or sewerage) inaccessible from the inside, comprises a front module (1) and a rear module (2) each module being fitted with mobile arms (3, 5) and hydraulic displacement means (4, 6) connectable to an hydraulic pump at surface level. In their inoperative position, the arms (3, 5) form a diameter which is much smaller than that of the pipe (7) to be repaired. In their operative position, the arms (3, 5) form a diameter which is either similar to or slightly smaller than that of the pipe (7) to be repaired. The front module (1) thus, through the pressure exerted by the arms on the damaged inside walls of the pipe (7), acts both as a widener and as a guide, to restore the pipe (7) to its original diameter and to facilitate passage along the pipe of the rear module (2).

Abstract: A method of filling an annular space between inner and outer coaxially arranged pipes while providing the option of maintaining fluid flow through the inner pipe includes optionally establishing fluid flow through the inner pipe; installing first and second seals in the annular space between the two spaced apart pipes at first and second ends of the pipes and inserting one end of a vacuum tube into the annular space through the first seal at the high point in the first seal. A grout tube is inserted into the annular space through the second seal at the high point of the second seal. A vacuum is applied to the second end of the vacuum tube and a grout mixture is applied to an opposite end of the grout tube. A sufficient vacuum is maintained within the annular space for such a time period to draw the grout mixture from the second end to the first end of the pipes to completely fill the annular space.

Abstract: The present invention proposes a process for the rehabilitation of sewers that are in danger of collapsing, in particular profile sewers, by the use of a ground stabilizing technique, in which a dense inner shell is introduced into the damaged sewer, the damaged sections of the sewer wall are loosened and/or removed from outside by the use of a cutting jet of water or suspension, with or without added air, and the resulting or existing space is filled and stabilized with mortar and/or suspension. This process is universally applicable, presents no technical difficulties, and results in an economical and durable renovation of damaged sewers.

Abstract: Metal pipe sections are welded together at the job site and then progressively coated with concrete by a traveling coating machine moving along the length of the pipe. After the coating operation the pipe is supported on forms having an upper concave portion shaped to receive the curved pipe. After the coating has hardened the pipe can be removed from the forms and installed. Apertures in the forms allow fluid to drain from the coating. Curved shims containing apertures aligned with those in the forms may be used to accommodate smaller pipe diameters.

Abstract: Structure and a method for installation of drain conduit whereby the drain conduit is positioned at a proper elevation with respect to an adjacent surface in a floor or parking lot or the like. The drain conduit is positioned within a trench. Support structure of this invention supports the drain conduit in the trench as concrete or other solidifiable material is poured into the trench to support and to secure the position of the drain conduit. Then after the concrete has partially solidified and is capable of support of the drain conduit, the support structure of this invention is removed and is reused in another installation.

Abstract: The tensile strength, and particularly the ability to resist changes in cross-sectional configuration, of a rigidifiable-in-situ passageway lining material comprising a fibrous body with a settable resin forming a part thereof, the fibers in that fibrous body having their lengths generally extending transversely to the plane thereof, is enhanced by incorporating thereinto a reinforcing layer formed of fibers with their lengths generally extending in the plane of the lining, and preferably circumferentially when the lining defines a tube. A pair of such reinforcing layers may be provided, each near a different surface of the lining, thereby to simultaneously protect against buckling and ovality.

Abstract: A pipe or cable laying apparatus includes a quadrilateral linkage device mounting the narrow ripping plow to a tractor and a chute body hingedly mounted to the trailing edge of the plow. The chute body includes a cable conduit compartment therein, and a separate chute and hopper for passing particulate materials through the body, and an auger device provided at the bottom of the body. The auger device is hollow and communicates with the cable conduit. The other end of the hollow auger device communicates with a discharge opening in the bottom of the body while the chute provides a steady gravity flow of particulate material to the auger.

Abstract: The claimed pipeline is made of coaxially arranged envelopes rigidly connected to each other, in which case the internal envelope is made of nonhermetic layers and hermetically sealed layers (3, 4) and the whole set of envelopes is impregnated with a binder (5) and forms a monolithic structure, the external envelope (1) being made of a ground (2).The method consists in forming hole (11) in the ground and insertion into the ground of the nonhermetic layers and hermetically sealed layers (3, 4) of the internal envelope, impregnation of its ground (2) with a binder (5) and followed by expansion and densing of the envelopes by producing an excess pressure of the working medium in the pipeline (9).

Abstract: A pipeline vessel for laying out and coating a pipeline from a storage reel onto the bottom of a body of water. The vessel equipment provides for both straightening and tensioning of the pipeline as well as coating with a wide range of concrete and/or polymer coats. Both extrusion type thermoplastic coatings and reacted in situ thermoset resins are employed. The process of laying a relatively inflexible pipeline from such a reel pipelaying vessel and coating the pipe as it is laid out is also provided.

Abstract: The manufacture of extended, inaccessible holes for underground ducts, conduits and the like is performed by a closed construction process, wherein the preferably remotely-controlled excavation is performed and following that a structure is installed which is employed as the product duct, conduit or the like. The installed structure is provided by injection of an injection material under pressure into an annular space between a form following the excavating apparatus and the ground to manufacture at least one endless inner wall for the hole which then serves as the underground duct, conduit or the like. The novel apparatus of this invention correspondingly comprises a form following the required excavation mechanism conformed to form an annular space between the form and the ground, that form having a form front closing the form and at least one inlet therein for injection of an injection material into the annular space.

Abstract: A method of producing underground pipes, with pipe sections being pressed ahead into the ground. For each pipe section, at least two partial pipe shells are used which are separated from one another in the longitudinal direction, and are joined about supply lines which are guided through the pipe. The joining process is effected before the pipe section is pressed into the ground. With this method, the supply lines do not have to be interrupted when a new pipe section is introduced. The apparatus for carrying out the method is provided with at least one joining station for joining the partial pipe shells in a precisely fitting manner, and a combining station for interconnecting the partial pipe shells.