Abstract: A stabilizer for an in situ column drilling apparatus comprises a first and second mounting arms, a first and second stabilizing members, and a first and second stabilizing tabs. The mounting arms are adapted for rotatable coupling to the shaft of column drilling systems. The first and second mounting arms are preferably positioned spaced apart along the shaft near the drilling auger. The mounting arms are coupled together by two stabilizing members at opposite ends of the arms distal the shaft. The stabilizing members are advantageously shaped to fit closely against the wall of the column to prevent changes in the auger's drilling course. The first and second stabilizing tabs are attached to the first and second stabilizing members, respectively. The first and second tabs are mounted to extend radially outward from the shaft and also prevent changes in the auger's drilling course.

Abstract: An adaptation of apparatus disclosed in U.S. Pat. No. 5,135,058 to provide foundations or perimeter walls is effected with the drilling of circular holes within a range of four to sixteen feet overlapping to provide continuous area coverage in the case of foundations with a minimum of overlap and to provide a minimum wall thickness in the order of hole radius in the case of containment walls.

Abstract: Compacted granular or stone columns are constructed in soil to increase the load-bearing capacities of the native soil. An elongated hollow tubular member is penetrated down into the soil to a predetermined depth and then the granular material or stone for constructing the column is fed down through this member and out the lower end thereof where it is then driven outwardly in a radial direction by an impeller which is exposed, at least in part, at the lower end of the tubular member, as the hollow tubular member is either penetrating or being withdrawn from the soil at a predetermined rate to thereby forceably compact this granular or stone material in a substantially radial direction to construct a stone column. Sufficient forces may be applied by the impeller to the granular or stone material to fracture the surrounding soil.

Abstract: The invention is a method of installing an outer-cased piling through a zone of subsoil contamination which includes boring a hole to a predetermined depth below the contamination, placing a smaller diameter casing in the full length of the hole, pumping a cementitious material between the outer casing wall and the soil, installing the piling through the casing and down to a point of refusal below the contaminated zone, filling the piling form with cement and then filling the void between the piling and casing with a cementitious material.The outer-cased piling design allows the piling installation through zones of contamination without adversely impacting the environment or spreading the contamination to other subsurface layers.

Abstract: A method and apparatus for placing cementitious material into an excavation using a mobile unit having an extendable flexible hose mounted on a power driven hose reel. Cementitious material is pumped through the hose and out the hose end into an excavation as the flexible hose is reeled out of the excavation. A weight at the end of the hose keeps the end of the hose from jetting itself about during the pumping operations. An extendable hose boom positions the end of hose over an excavation and directs the hose into the excavation and out during pumping.

Abstract: A method and apparatus for producing short aggregate piers in situ in the ground including the steps of forming a cavity in the ground, compacting soil in the vicinity of a bottom portion of the cavity to prestress and densify the soil beneath the cavity, adding a layer of loose aggregate to partially fill the cavity, compacting the layer of loose aggregate with an implement 10 adapted to reduce the height of the layer and adapted to prestress and densify the soil laterally by forcing some of the aggregate laterally into the sides of the cavity and thereby also enlarging the cavity in the vicinity of the layer, and repeating steps of adding aggregate and compacting aggregate until the cavity is filled substantially completely with compacted aggregate or is filled to the desired elevation. The resulting pier has a bulging, undulating outer surface which the surrounding prestressed soil is better able to support.

Abstract: A bearing pier foundation for compacting soil that includes a plug extending along the longitudinal axis having a first section and a second section. The first section adapted to receive a pushing force for pushing the plug into the soil and the second section adapted to rest on the soil to be compacted. A plane, which is perpendicular to the longitudinal axis, passes through the second section. The second section includes a first part and a second part. The first part has an inner edge and an outer edge intersecting the plane. The outer edge of the first part attaches to the first section and is positioned further away from the longitudinal axis than the inner edge of the first part. The second part has an outer edge attached to the first part inner edge. The second part extends downwardly from the plane and the second part has a tapering segment extending along the longitudinal axis and includes an upper end and a lower end.

Abstract: An integral combination of column and pile for use in building structures in a sandy soil. The method of formation is to provide a ground situs of suitable depth and width formed preferably by an hydraulic-powered auger. The situs is then filled with a cementitious slurry. A reinforced precast concrete column is provided having reinforcing bars extending a substantial length out of its bottom. The exposed bars are inserted into the slurry until the column merges with the slurry. Upon the hardening of the slurry, the result is an integral column and pile set into the ground.

Abstract: A method of mixing materials includes a fluid medium, such as an aqueous fluid or a gas, continuously introduced into a mixing column for a time sufficient to allow the fluid to at least substantially fill the column. A predetermined amount of at least one primary material is introduced into the upper end of the mixing column. The primary material is permitted to descend through the fluid medium at a predetermined rate. Secondary materials are introduced into the mixing column through at least one end or through at least one position along the side of the mixing column at an angle and velocity sufficient to cause the secondary materials to intimately contact the primary material along its path of descent through the fluid medium so that the primary and secondary materials are continuously mingled as they descend through the fluid medium until they reach the lower end of the mixing column.

Abstract: This invention relates to a reinforced concrete load-bearing pile with multi-branches and enlarged footings for reinforcing foundations, and means and method for forming such a pile. The load-bearing pile of the invention comprises a pile body, and at least one branch and enlarged footing integrated with the pile body. The means for forming the pile comprises a pile cavity drilling/pressing device, a branch cavity pressing device and an enlarged footing cavity pressing device. The method for forming the pile comprises forming a pile cavity, consolidating the base and surroundings of the cavities forming a branch cavity, forming an enlarged footing cavity, and casting the pile.

Abstract: A building method is provided that avoids the use of the traditional excavated foundation. The method comprises placing primary support members (10) into the ground in which the structure is to be built at predetermined intervals, spanning the gap between support members (10) by pre-cast reinforced concrete beams (14) of generally inverted T-shape and predetermined length and building, for example, a double skin wall (42, 44) on the outer flange (22) and top of the beam while the inner flange (22) supports a floor slab of beams (40) blocks (46) and screed (48) and abuts the inner face (31) of the upright of the beam to resist inward lateral movement thereof.

Abstract: A method for the facile filling of remotely located forms with cementitious materials. The method uses a transportable bin which is captively coupled to the arms of a skid loader. The bin includes a generally rectangular container having four vertical sides and an accessible interior truncated at a base and having a covered dispensing aperture at the bottom. The covered aperture is adapted to be actuable in situ by the skid loader operator using controls located within reach of the operator when the aperture is vertically disposed over a form to be filled.

Abstract: A tubular footing form of the recoverable type for building concrete foundation piles comprises an end shutting organ destined to prevent water from the water bed from entering the footing form while the latter is being plunged into the ground and to enable the concrete casting to be performed during the step of recovery of the same footing form. The end shutting organ is installed inside the tubular footing form at a certain distance from its free end so as to create a seal chamber which, during the step of plunging of the footing form, gets filled with compacted earth, which forms a plug which tightly seals the shutting organ against the entering of water from the water bed.

Abstract: A method of forming a pile and a method for supporting a building structure by utilizing a pile so formed comprises driving a pile casing (19), with an enlargement (24) near its leading end (20) to a desired depth and supplying under pressure a settable mixture through the top of the casing so that it flows through apertures (26) at the enlargement to fill the oversize hole left by the enlargement around the casing. The casing can be driven through a hole formed in the building structure to be supported and the settable mixture may flow up the pile casing to fill a void under the structure.

Abstract: Method for producing a narrow or slit wall (42) in soil (22) by means of a driver (10) with at least two and preferably three vibrating tubes (I, II, III) and guide blades (28, 30, 32) between the vibrating tubes. Following penetration of the driver into the soil, during the withdrawal process of the latter, injection material (40, 44) is loaded into the drilled cavities. During the next work step, the driver is lowered into the soil so that the rearmost vibrating tube (I) is lowered into the still-soft injection material (40) which was added during the previous withdrawal of the foremost vibrating tube (III). By monitoring the power draw of the vibrating motor on the rearmost vibrating tube (I) and regulating this power draw to keep it to a minimum value, removal of the rearmost vibrating tube from the still-soft injection material (40) is prevented. As a result the seal between the successive sections of narrow wall (42) is ensured.

Abstract: The invention is a method of installing an outer-cased piling through a zone of subsoil contamination, and the apparatus used therein, which includes boring a hole to a predetermined depth below the contamination, placing a smaller diameter casing in the full length of the hole, pumping a cementitious material between the outer casing wall and the soil, installing the piling through the casing and down to a support layer well below the contaminated zone, filling the piling form with cement and then filling the void between the piling and casing with a cementitious material.The outer-cased piling design allows the piling installation through zones of contamination without adversely impacting the environment or spreading the contamination to other subsurface layers.

Abstract: The invention concerns a metallic tubular pile equipped with a device allowing for the injection of grout close to the wall of the tube (12) forming the pile, said device being of the type comprising a tubular injection pipe (17) connected through a plurality of non-return valves to a plurality of injection orifices (16) traversing the wall, wherein at least one non-return valve (18) is mounted on the injection pipe (17) inside a transfer chamber (20) communicating with the corresponding injection orifice (16).The invention can be used in anchorage pile applications for on-shore, river and/or sea foundations.

Abstract: System including method and apparatus for treating contaminated underwater sediment by lowering a hollow casing to an underbed, lowering a power driven Kelly bar with injecting and mixing blade fed with treatment material such as solidifying cement and flyash, providing a top cover for confining the sediment to be treated within the casing, injecting and mixing the treatment material through the Kelly bar, and sequentially moving the casing with Kelly bar to adjacent treatment locations.

Abstract: The present invention relates to a method for improving the ground of a large area. The method comprises the steps of inserting a pipe into a hole previously dug in the ground, injecting a high pressure liquid and a ground improving injection liquid from an injecting apparatus attached to the tip of the pipe, drawing up the pipe, grouting the ground, and injecting the ground improving injection liquid to thereby form an underground columnar consolidation body for improving the ground. The drawing-up operation of the pipe is executed while applying vertical vibration to the pipe. Thus, a consolidation body of a large area for improvement of the ground is obtained without concave and convex portions.

Abstract: This invention relates to a reinforced concrete load-bearing pile with multi-branches and enlarged footings for reinforcing foundations, and means and method for forming such a pile. The load-bearing pile of the invention comprises a pile body, and at least one branch and enlarged footing integrated with the pile body. The means for forming the pile comprises a pile cavity drilling/pressing device, a branch cavity pressing device and an enlarged footing cavity pressing device. The method for forming the pile comprises forming a pile cavity, consolidating the base and surroundings of the cavities forming a branch cavity, forming an enlarged footing cavity, and casting the pile.

Abstract: A pinned foundation system with resiliency under certain loading conditions and requiring minimum excavation, having a cast footing in combination with a plurality of sleeves through which piles may be driven into the soil to create the necessary bearing, uplift and lateral forces to support a structure. The sleeves are retained in fixed position relative to the footing, at predetermined angles corresponding to the specific structure loading characteristics desired for the ensuing foundation.

Abstract: A method of constructing shafts and continuous walls quickly and efficiently. The construction process consists of one step in which air and a ground hardener are injected through a jetting pipe element to form a column-shaped region of soil mixed with hardener; and another step in which a hardening inhibitor is injected into the soil-hardener mixture region by the jetting element, the shaft then being formed by excavating the portion of the ground that has not been hardened because of the presence of the inhibitor.

Abstract: A method and apparatus for placing cementitious material into an excavation using a mobile unit having an extendable flexible hose mounted on a power driven hose reel. Cementitious material is pumped through the hose and out the hose end into an excavation as the flexible hose is reeled out of the excavation. A weight at the end of the hose keeps the end of the hose from jetting itself about during the pumping operations. An extendable hose boom positions the end of hose over an excavation and directs the hose into the excavation and out during pumping.

Abstract: An apparatus for piling a cast-in-place pile includes an earth auger main body and an auger head. The earth auger main body includes a hollow shaft, a spiral screw blade provided about the hollow shaft, a spiral belt provided on an outer circumference of the spiral screw blade and in parallel with an outer circumferential surface of the hollow shaft. The auger head is connected to a lower end of the earth auger main body and includes a holow shaft, one or two spiral screw blades provided about the hollow shaft, one or two spiral belts provided on outer circumferences of the spiral screw blades and in parallel with the outer circumferential surface of the hollow shaft, and excavating bits provided at a lower end of the spiral screw blades, and device for preventing excavated earth and sand from flowing in a return direction when the auger head is rotated in a reverse direction.

Abstract: A device for forming cast-in-situ piles in civil engineering work includes an auger which consists of a conventional lower part and an upper part comprising a hollow inner element and a removable outer element in the form of an auger having a longitudinal discontinuity which enables it to be fitted over the hollow inner element. The hollow inner element may extend, fixedly, as an elongation of the lower part of the auger or be mounted telescopically in the latter.

Abstract: An improved pipe pier inserting tool comprising at least two separate driving means, attached to two separate gripping means, whereby a pipe pier held within the gripping means can be forced, either in tandem or sequentially, by the two driving means into unstable soil beneath a building foundation so as to add new support.

Abstract: An apparatus for forming an in-ground concrete piling includes an elongate hollow mandrel which can be driven into the ground with a pile driver. A cupped foot, having a larger cross-sectional area than the mandrel, is placed beneath the mandrel before it is driven into the ground, and openings located near the bottom of the mandrel permit grout placed in the mandrel to flow into the space between the mandrel and the foot. A hollow sheath which slidably fits over the foot is attached to the bottom of an annular collar which slidably fits over the mandrel, forming a seal to prevent escape of grout from the openings while the mandrel is being filled. In use the mandrel is filled with grout before it is driven into the ground. Thereafter, during driving, the grout flows out of the openings in the bottom of the mandrel into the space around the mandrel, which is created by the foot.

Abstract: A stopper apparatus for neutralizing rotary reaction force set up by the rotation of a casing in an all-casing driver, comprises a long transmission frame for transmitting the reaction force, including a base frame connected to a casing drive unit and a joint frame one end of which is connected to the base frame, and a support frame horizontal- and vertical-rotatably connected to the other end of the joint frame. At least one side of the support frame comes in contact with a supporting mass by which the reaction force is supported. The stopper apparatus also comprises a pedestal for placing a working wagon thereon, detachably connected to the transmission frame, an inclination device for raising the pedestal to an inclined position, and an inter-frame distance increasing device for increasing the wedge of the pedestal.

Abstract: A silo or like structure (16) adapted to be driven end first into the ground comprising an elongate body, wherein the body is enlarged at one end thereof, wherein the enlarged portion carries a cutter (28) directed axially away from the body so as to form an outsize hole for the body when the structure (16) is driven in, wherein ducts (210, 211, 212) are provided for conveying a fluid from a fluid source to the outside of the body behind the enlarged portion, and wherein the structure (16) includes a flexible sleeve (214) attached to the enlarged portion and adapted to cover the body in spaced relationship therefrom, the ducts (210, 211, 212) opening into the annular space defined between the body and the sleeve (214) when the sleeve (214) is in its covering position.

Abstract: An improved method and apparatus for the formation of casing assisted grout piles at low density overburden construction sites is provided which includes a collar assembly (44) adapted to be secured to the conventional upright support frame (12) forming a part of typical pile-forming equipment. Preferably, the assembly (44) includes a pair of hingedly interconnected arcuate collar sections (46,48) which cooperatively grip the upper protruding end (42) of an embedded metallic casing (40). The sections (46,48) are provided with circumferentially spaced elongated, gripping elements (70) thereon, as well as a piston and cylinder assembly (60) for selective opening and closing movement of the sections (46,48). Use of the casing-gripping assembly (44) prevents substantial movement or uprooting of the embedded casing (40), and permits pile formation at sites such as landfills containing municipal solid wastes.

Abstract: A practical method of forming foundation structures for buildings or the like is provided which allows economical and convenient formation of foundation piles and pile caps. In the preferred method hereof, an auger is drilled to a desired depth in the soil whereupon grout is pumped through the hollow shaft of the auger while the auger is removed to form a pile having an upper surface generally even with the initial grade level. A grout pump then removes grout from the pile down to a lower level generally slightly above the desired base level of a pile cap. After the grout hardens, the soil in the vicinity of the pile is removed to a level generally even with the upper surface of the pile whereupon a pile cap is poured onto the pile for at least partial support thereby.

Abstract: The present invention is directed to side cutting blades for use with multi-shaft auger machines which mix soil with a chemical hardener in situ to form soilcrete columns. The side cutting blades includes two parallel blades which cut the soil between the adjacent columns along planes approximately tangential to the periphery of adjacent columns. As the soil is cut by the cutting blades, the soil is thoroughly mixed with a chemical hardening agent. Adjacent soilcrete columns are integrally connected by substantial column overlap without physically moving the columns closer together or performing multiple borings on the soil adjacent to the columns formed by the initial boring.The side cutting blades are particularly suited for use with a multi-shaft auger machine which has minimal column overlap.

Abstract: A method and apparatus for raising and supporting a foundation where a hole is excavated beneath the foundation, one or more pipes are driven into the earth at diverging angles to form a piling, and a jack is placed in the hole above the piling and beneath the foundation. A self-hardening fluid is forced into the jack to raise the foundation. A jack is created from a pair of hollow cylinders, each having a single closed end, and slidably engaged open end to open end for vertical movement when a self-hardening fluid is forced through an opening formed in one of the cylinders. The jack may be formed of an open-top cylinder having a concrete piston formed inside that is raised by pumping grout through an opening in the cylinder and into a void under the piston.

Abstract: The invention is a method for installing a piling of a predetermined target depth in the ground, particularly on the ocean floor. A pipe is lowered into the ground together with a drilling machine having rotatable cutters movable from a first position in which their transverse dimension is less the inner diameter of the pipe to a second position in which their transverse dimension is greater than the outer diameter of the pipe. The cutters are lowered to a location below the pipe, moved to the second position, and rotated to drill a hole having a diameter larger than the outer diameter of the pipe. After the cutters are retracted and the drilling machine is raised back within the pipe, the pipe and drilling machine are lowered to the bottom of the hole. The steps are repeated until the total target depth is reached. The drilling machine is then removed and the anular space between the wall of the hole and the exterior surface of the pipe is filled with cement.

Abstract: The present invention is directed to side cutting blades for use with multi-shaft auger machines which mix soil with a chemical hardener in situ to form soilcrete columns. The side cutting blades includes two parallel blades which cut the soil between the adjacent columns along planes approximately tangential to the periphery of adjacent columns. As the soil is cut by the cutting blades, the soil is thoroughly mixed with a chemical hardening agent. Adjacent soilcrete columns are integrally connected by substantial column overlap without physically moving the columns closer together to performing multiple borings on the soil adjacent to the columns formed by the initial boring.The side cutting blades are particularly suited for use with a multi-shaft auger machine which has minimal column overlap.

Abstract: The invention is related to a kind of fabrication method and device of hollow reverse circulation piles of which the central hollow portion is installed with a movable sand barrel between which and the surrounding reinforcing cage, positioning device for movable sand barrel is installed. For starting the work, grouting to scheduled height from bottom of pile bore is made first and then grouting between pile bore wall and outer wall of movable sand barrel is conducted. Meanwhile, sands are poured into movable sandbarrel. By virtue of sensors on the inner and outer walls of movable sand barrel, the pressure between concrete grout and sand will be kept in equilibrium to avoid reverse grouting due to opposite pressure. Then, the sand barrel is pulled up step by step so that the pile poured with sand at its central part is primarily completed. Water is finally poured into the central part and sand is suctioned out to complete the hollow-typed reverse circulation pile.

Abstract: Several underpinning arrangements are described. In each, a concrete pile is cast in a hole formed adjacent to the structure to be underpinned. The hole is formed from at or near ground level and is vertical or at an angle close to the vertical. At least one supporting limb is also formed. This extends from the pile hole and engages the structure. When the pile is cast in the pile hole, the pile and supporting limb are made to form a unitary element so that forces exerted on the supporting limb by the structures are transmitted to and borne by the pile. Various configurations of supporting limb are described, as are various arrangements for ensuring that the supporting limb is retained in a position in which it supports the structure. A drilling assembly for use in the method is also described.

Abstract: Process for providing foundations and/or reinforcing the ground under buildings and other suitable constructions such as road embankments, by taking out soil and replacing it with a lighter material, which is known as laying compensating foundations. From a number of points over the area where it is intended to reinforce the ground, a plurality of holes is drilled in the soil material or is made by some other expedient soil-removing method, extending in the desired directions, in such a way that soil material is left between the holes. The soil material removed from the holes which have been made is replaced with a plastic material or some other suitable replacement material with a lower density than the removed soil material, whereby the stress diagram which the soil material bears over the actual area is obtained.

Abstract: A method of providing a foundation support in unstable ground includes digging a hole into the soil until a stable substrate is reached, erecting column shuttering, back-filling the soil around the column shuttering, and casting a cementitious mix into the cavity defined by the column shuttering to form a column extending upwardly from the stable substrate. A footing is formed at the bottom of the hole e.g. by pouring a settable cementitious mix into the hole. Footing shuttering can be provided e.g. in the form of an inverted frustoconical shell or a hemi-spherical shell, or formed from bendable sheet material, shaped to an appropriate form and secured together e.g. by stapling, or it can be made up of trapezoidal panels which are assembled to form a flat topped hollow pyramid.

Abstract: A method of forming a support or foundation for a building structure comprises forming a number of upwardly diverging support members interconnected at their upper ends by making correspondingly shaped holes in the ground on which the structure is to be supported thereafter pouring concrete into the holes and allowing it to set to form the foundation. In certain grounds it may be necessary to extend the support structures by driving piles from their base.

Abstract: The invention relates to a method for installing a hollow pile into an earth formation. The pile is provided with a closed bottom and perforations in a section of its wall near the bottom end and/or bottom closing plate. In this method, the pile is driven into the earth formation and liquid thermo-setting resin-forming composition is displaced through the pile and the perforations to permeate the formation where it solidifies and forms a consolidated mass. The liquid thermosetting resin-forming composition comprises:10-25%v--Epikote - 8282.5-10%v--MDA12.5-30%v--Butyloxitol0.25-2.5%v--DMP-100.5-5%v--Kerosene, and37.5-65%v--Xylene.

Abstract: A method and an apparatus for producing a support element in the ground are described, a hole being sunk through non-stable ground at least down to the load bearing soil. As a result of a wedge-shaped construction of the drill bit the loosened soil is displaced into the adjacent region of the hole and consequently the area round the hole is compacted. The drill has a circular cylindrical core, which is provided with an outlet opening in the vicinity of the drill bit. Preferably tampable material is filled through the core tube, accompanied by the retraction of the drill. The material is simultaneously tamped with the aid of the drill. The invention has the particular advantage that, in cost effective manner, it is possible to use tampable material from the area immediately surrounding the building site and there is no need for expensive, classified filling material. Tubing of the hole is unnecessary through the use of the core tube.

Abstract: A method and apparatus for raising and supporting a foundation where a hole is excavated beneath the foundation, one or more pipes are driven into the earth at diverging angles to form a piling, and a jack is placed in the hole above the piling and beneath the foundation. A self-hardening fluid is forced into the jack to raise the foundation. A jack is created from a pair of hollow cylinders, each having a single closed end, and slidably engaged open end to open end for vertical movement when a self-hardening fluid is forced through an opening formed in one of the cylinders. The jack may be formed of an opened-top cylinder having a concrete piston formed inside that is raised by pumping grout through an opening in the cylinder and into a void under the piston.

Abstract: A piling structure or ground anchor comprising at least one piling member portion adapted to be driven into the ground or inserted into a pre-bored hole therein (31); a spreading mandrel member (34,40) adapted to be passed into the structure or ground anchor so as to expand the piling member (31) portion laterally into the ground; and holding means (45) for holding the piling member portion in its expanded disposition.

Abstract: The method of forming footings and piers in concrete construction includes excavating to accommodate placement of a two-part mold. The upper mold part is for the pier and interfits and communicates with the lower footing mold so that both may be poured at the same time through the upper pier part.

Abstract: A concrete pile installation apparatus and method is disclosed wherein a device penetrates the soil to produce an opening for the formation of the pile. Fill material, such as grout, is introduced into the opening and a potential vacuum void created in the formation of the pile is vented to the atmosphere to prevent the pulling of surrounding soil into the opening and thereby causing the formation of a defective pile.

Abstract: A screw-on splicer for use in driving composite pipe-shell piles and a screw-on tip for shell piles. Each has an outer diameter at least about 2 inches greater than the O.D. of the shell. An enlarged tip for shell piles, comprises a mass of concrete encased in a non-tapered corrugated shell and having a corrugated shell socket for receiving the shell stem.

Abstract: The anchoring element has at least one anchor traction member 1 stressable against an abutment 3 and kept longitudinally movable in the ground by an envelope 5. An anchor body 6 is connected with this anchor traction member 1 at its end facing the bottom of the anchor bore. The anchor body 6 interacts with at least one pressure member 1' under pressure. This pressure member 1', cooperating with the surrounding compression body 2, is also extended, as a traction member 1' for tensioning against the abutment 3, up to the ground surface. The traction member 1' cooperating with the compression body 2 is this way used on one hand, for pressure, and on the other hand for traction.

Abstract: A method for use when installing piles, in which a pipe (2) or the like is inserted into the ground (1) and a flowing and solidifiable substance (3) is introduced into the ground through the pipe, in order, when solidified, to support a pile, and in which method the solidified substance is subjected to pressure in order to cause the substance to penetrate into the surrounding earth and/or to displace the earth, so as to provide an anchorage for the pile.

Abstract: The invention provides a pile construction method which allows repeated formation of a supplemental base concrete body at the bottom of a cast-in-place pile, wherein before a previously introduced cement mortar consolidates at the bottom of the pile, a soil stabilizing liquid agent is injected through an injection tube which extends to the bottom of a pile so as to penetrate into the earth surrounding the bottom of the pile. After the cement mortar consolidates, the flow passages of the soil stabilizing agent become permanent passages in the pile base for a next injection of cement mortar.