Abstract: A pile driving system for driving a pile comprising a support system comprising an arm assembly, an engaging system comprising a primary housing and a secondary housing, a suspension system, a vibratory system, and first and second clamp assemblies. The first clamp assembly rigidly connects the secondary housing to the pile. The second clamp assembly rigidly connects the secondary housing to the pile. The second clamp assembly rigidly connects the secondary housing to the side portion of the pile. The tip portion of the at least one pick member engages at least one sheet pile of a substantially horizontal stack of sheet piles to remove the at least one sheet pile from the stack of sheet piles. The pile driving system drives the pile using at least one of a driving force generated by the support system and a vibrational force generated by the vibratory system.

Abstract: Pile driving apparatus comprises first and second sets of eccentric members mounted in a housing for opposing rotation. A phase shifting arrangement connects the sets of eccentric members for controlling coordinated rotation thereof, and comprises a limiting device between the first and second sets of eccentric members for shifting between a first condition wherein the eccentric members are constrained to rotate out of phase to negate generation of vibration and a second condition wherein the eccentric members are constrained to rotate in phase to generate vibration. Two motors are connected with the limiting device for alternatively driving rotation thereof. A control arrangement selectively drives the limiting device predominantly by the first motor for shifting the limiting device into the first condition thereof for preventing vibration or predominantly by the second motor for shifting the limiting device into the second condition for generating vibration in the housing.

Abstract: A method and apparatus for constructing soil columns in-situ in the ground are disclosed for the purpose of improving the structure supporting capability of surface soils to support loads from buildings and other structures. Some embodiments use a surcharge ring or load to apply a stress to soil surrounding a construction site for a soil column. Methods according to the present disclosure may reduce impact on the environment because they may be performed with only one piece of normal construction equipment. In addition, gravel, crushed stone, cement or chemicals may not be required.

Abstract: An apparatus for placing foundation devices and/or pipes and/or augers in the ground, as an attachment to be attached to the boom of a construction vehicle, including a mounting hinged to a coupling point of the boom, and a drive head, which is rigidly connected to the mounting and configured as a rotational driving and/or drilling and/or impact drilling and/or pile-driving drive and to which the foundation device/pipe/auger for placement in the ground can be coupled. The coupling point can be displaced with respect to the drive head in at least one first direction which is transverse to the longitudinal axis of the foundation device/pipe/auger, and optionally in a second direction, which is transverse to the first direction. The mounting can be a universal joint in which a first joint axis extends so that a first and a second joint part can be displaced thereon, relative to each other, in the first direction, so as to displace the coupling point.

Abstract: A pile adapted to be driven into the ground and having retaining formations to retain one or more geothermal conduit loops. Each conduit loop is formed by opposed longitudinal conduit sections interconnected at a lower end by an interconnecting section. The conduit loops are adapted for flow of a heat exchange fluid therein. The retaining formations retain the one or more conduit loops in close proximity to the pile through the attachment means as the pile is driven into the ground.

Abstract: A working apparatus for processing, especially sealing, underwater bed areas, especially banks and bottoms of waterways, especially canals, a process for setting up said apparatus, a process for moving said apparatus and uses of said apparatus are described.

Abstract: Methods and apparatus for foundation systems generally include a vertical support, a horizontal support configured to couple to the vertical support, and a composite material configured to couple to the horizontal support. The vertical support may be configured to resist fluctuation in soil elevation. The composite material may comprise a block material and a fibrous material.

Abstract: The disclosure describes, in part, apparatuses and methods for installing structures (e.g., foundations, footings, anchors, abutments, etc.) at work sites, such as difficult-access work sites. In some instances, a rotating drill assembly is assembled over a target location in order to excavate a radial array of batter-angled shafts associated with the target location in preparation for the installation of a radial array of micropiles. An operator utilizes the rotating drill in combination with a foundation pile schedule/decision matrix to design and install the radial array of batter-angled micropiles. This disclosure also describes techniques for designing, fabricating and installing structural caps to be coupled to the installed radial array batter angled micropiles. These structural caps are lightweight and, thus, more portable to difficult-access sites where they are coupled to the micropiles forming a foundation for structure to be installed at the difficult-access site.

Abstract: A method and apparatus for replacing a bridge using pre-cast materials, including steel piles, steel reinforced concrete caps, and metallic male and female connectors. The pre-cast materials can be formed to precise standards in a controlled factory environment before being brought to the worksite for the bridge replacement project. Further, the male and female connectors provide for a quick and robust way to connect the caps to the piles without the use of welding between the piles and the caps.

Abstract: The invention relates to a device for producing vibrations, particularly for fastening to ramming bodies, which are rammed into or pulled out of a burrow by said vibrations, comprising at least two balancing weights (15, 16) rotating in opposite directions in a synchronized manner and rolling on a track and driven by separate shafts. According to the invention, the track is a bearing ring (32) that is fitted into the housing, wherein said bearing ring is made of rolling bearing steel that has a hardness of HRC?50.

Abstract: An apparatus and method for the subterranean support of underground conduits is disclosed, including a pile driver that is configured to connect to an articulated boom of an excavator or another unit of positioning machinery to insert a section of curved sheet pile beneath a conduit. In one exemplary embodiment, the pile driver has a head portion and a body portion. The head portion of the pile driver is connected to the excavator and the body portion of the pile driver is moveable relative to both the head portion of the pile driver and the excavator to allow the pile driver to properly orient a section of curved sheet pile for insertion into subterranean material beneath an underground conduit.

Abstract: An equipment for constructing micropiles in soil, includes a drilling rod with a bit with at least one nozzle jetting fluid forward, and at least one nozzle jetting fluid substantially orthogonal; an element pulling a protective tube, not adhering to the rod. A corresponding method includes drilling with a drilling rod jetting liquid in front of the bit until reaching stable soil strata; drilling and injecting high-pressure grout with one or more lateral nozzles, while the drilling rod rotates; pulling the protective tube, the tube being inserted to the area of grout injection; when the required depth is reached, the proximal end of the drilling rod is anchored to a plate; when the grout is consolidated, traction is applied to the drilling rod if necessary. Grout is injected into the protective tube.

Abstract: A pile splice section for a spliced prestressed concrete pile includes a prestressed concrete element including a first end and a second end and a plurality of tendons that extend from the first end to the second end. A first end assembly at the first end of the prestressed concrete element includes a first plate coupled to the plurality of tendons. The first end assembly further includes a plurality of internally threaded fasteners embedded in the first end of the prestressed concrete element that are engagable via apertures extending through the first plate. A second end assembly at the second end of the prestressed concrete element includes a second metal plate coupled to the plurality of tendons. The second end assembly further includes a plurality of apertures extending through the second plate and accessible via pockets proximate the second end of the prestressed concrete element.

Abstract: A pile driving system comprising an engaging system comprising a suspension system, a vibratory system, and first and second clamp assemblies. The primary housing is operatively supported by an arm assembly of a support system. The suspension system is configured to resiliently oppose movement of a secondary housing within a limited range of movement relative to a primary housing. The vibratory system is rigidly connected to the secondary housing. The first and second clamp to assemblies are supported by the secondary housing. In a first mode, the first clamp assembly rigidly connects the secondary housing to the pile, and in a second mode the second clamp assembly rigidly connects the secondary housing to the pile. The pile driving system drives the pile using a driving force generated by the support system and/or a vibrational force generated by the vibratory system.

Abstract: An adapter assembly for transmitting a drive force from a pile driving system defining a drive axis to a pile defining a pile axis comprising a base assembly and an adapter assembly. The base assembly is operatively supported such that the drive force is transmitted to the base assembly. The adapter assembly comprises a plate member, a skirt member defining a skirt chamber, and an adapter connector configured to support the skirt member relative to the base assembly, the plate member, and the pile member. The adapter assembly substantially aligns the drive axis with the pile axis. The drive force is transmitted from the base assembly to the plate member. The pile is received within the skirt chamber such that the drive force is transmitted from the plate member to the pile. The skirt member is substantially isolated from the drive force.

Abstract: A method of installing an underwater foundation, suitable for use in supporting or anchoring wave or tidal energy capture devices is provided. The method comprises providing a foundation unit (1) equipped with a submersible drilling rig (16); placing the foundation unit (1) on the bed (50) of a body of water at a selected location; activating the submersible drilling rig (16) to drill a plurality of pile holes (56) in the bed of the body of water; and securing the foundation unit (1) to the bed of the body of water by means of piles (54) or tendons, inserted in pile holes (56) and secured to the foundation unit (1). A foundation unit (1) and a submersible drilling rig (16) for use in the method are also provided.

Abstract: A method of mechanized construction has developed for installing an earth wire under-bracing by using an auger crane and adjustable excavating unit with an auger crane. The extendable excavating unit is mounted to the lower end of an auger shaft of the auger crane and excavation teeth extendable and retractable are mounted to the excavating unit, thereby allowing excavation of a burial hole suitable to the size of the earth wire under-bracing. Whether it is needed to bury the earth wire under-bracing having a larger diameter than the diameter of excavation existing on the auger crane, or bury small-sized earth wire under-bracing, a method for mechanized construction of the earth wire under-bracing is enabled without difficulty by using an auger crane and adjustable excavating unit.

Abstract: Various embodiments of subsurface support devices, interior underpin brackets, and systems and methods for elevating a settled or settling structure are disclosed. One embodiment comprises an interior underpin bracket. One such bracket comprises: a support shaft having a bore adapted to receive an underpin pipe; and at least two support arms pivotally fixed to the support shaft, the support arms adjustable between a retracted position in which the support arms are disposed parallel to the support shaft and an extended position in which the support arms are disposed perpendicular to the support shaft.

Abstract: The present invention relates to a PHC pile used in a permanent retaining wall structure, and a connection method thereof, and more particularly, to a method of connecting PHC piles to each other by inserting a connection bar into connection pipes embedded in sheaths of the PHC piles. To this end, the PHC pile comprises a left connection pipe installed at one side of the sheath of the PHC pile and a right connection pipe embedded at the other opposite side of the sheath. Further, the method of connecting the PHC pile to each other comprises the steps of inserting a water-proof material into inner semi-cylindrical grooves of the connection pipes, inserting the connection bar between the connection pipes of the PHC piles, and consecutively connecting a plurality of PHC piles to one another by repeating the above steps.

Abstract: A method for mounting at last one tidal turbine and its associated support structures in a river or sea bed. The turbine and associated support structures are joined to a base of such weight as to involve gravitational forces of such magnitude as to be sufficient to withstand forces acting to tend to displace the turbine and its associated support structures. The base structure can be pre-assembled and transported to a required location of installation by lowering to the sea or river bed. Conveniently, the transportation is by means of an installation vessel incorporating a facility for lowering the entire assembly including at least one turbine, a support column, and the base structure in a controlled manner to rest at a desired position on the river or sea bed.

Abstract: Designs and methods for a modular foundation provide a strong and secure foundation in a time efficient and cost efficient manner. The modular foundation can include a cap structure having one or more pile guides coupled together. The modular foundation can further include piles that extend through the pile guides and into the ground. The cap structure and pile guides can be configured to use both vertical and angled piles. A plurality of connectors can connect the cap structure to the piles. The resulting foundation can be used to support various superstructures.

Abstract: This invention relates to a system and method for use in stabilizing different types of soils and/or creating anchorage and more particularly, to a system and method for injecting various types of solidifying material into a subsurface through a drilling apparatus during the drilling operation. The drilling apparatus may be removable and reusable used to create a micro or mini pile for soil stabilization, or alternatively it can be left in place to be used in conjunction with grout and similar materials for forming an anchor or load carry pier. A solidifying material swivel, a drive connector and a drilling apparatus, in combination are attached to a power drive unit. In one preferred embodiment, the drilling apparatus remains within the soil subsurface, encased in solidifying material. In another preferred embodiment, the drilling apparatus is removed leaving a homogenous pile of solidifying material behind.

Abstract: A piering system includes a heave plate attached to a foundation and supported by a pier. A downward facing socket is permanently attached to the heave plate. The socket receives the top end of a heavy stud of a coupling assembly, the bottom end of the stud is screwed into a captive nut of a shim-block. A nut is welded to the stud leaving about ½ inch of the stud protruding upwards for insertion into the socket. The nut may be turned to adjust the height of the stud. The shim-block and coupling assembly are supported by a head plate which is supported by the pier. The head plate includes a wide table for supporting a pair of jacks on opposite sides of a house jack facilitating installation of the system. The cooperation of the ball and socket helps to prevent “off-set loads” which otherwise may break the piering system.

Abstract: The present invention provides a pile driver capable of improving operability while preventing breakage and the like of a wire rope by relating a press-in winch and an elevation winch to each other. Solenoid valves are arranged respectively to hydraulic circuits of both of a press-in winch and an elevation winch and an electric circuit is provided to operate the solenoid valves in a related manner so that one winch is to be capable of rotating at semi-engaging when the other winch is set to be in a winding state with automatic brake operated.

Abstract: A tower structure (1) for use in a body of water, comprising a hollow outer section (2) with a first end (4) equipped with an opening. An inner section (3) is telescopically accommodated in the cavity of the outer section (2) and is telescopically movable in the outer section (2) from a position in which essentially the whole of the inner section is accommodated in the outer section to a position in which a length of the inner section projects above the first end of the outer section. The inner section comprises a plurality of chambers (6, 6?) fluid-connected via ducts (10?) and openings (9), and where at least one chamber is fluid-connected via at least one duct (10) to a source for a ballasting fluid (8), whereby the chambers (6) can selectively be filled with ballasting fluid.

Abstract: A device for and a method of inserting a drainage wick into the ground comprising the steps of: providing a drainage wick comprising a transversely permeable filter material surrounding a core adapted to longitudinal water circulation, where a portion of said drainage wick is arranged so as to be transversely and/or longitudinally impermeable; threading said drainage wick through an inserting tube; fixing an anchorage component to the lower end of said drainage wick extending out of said inserting tube; driving said anchorage component, said drainage wick and said inserting tube downwardly into the ground; and pulling up said inserting tube whereby said anchorage component and said drainage wick are permitted to remain into said ground.

Abstract: A form system is provided for forming a structural column assembly of the type used for erecting building structures and the like, such as a concrete column or footing formed in situ in an earthen hole. The system includes a support system, including a wire support member and an associated base foam ring having an offset center hole corresponding to the centerline of the concrete footing, which is placed at the bottom of the earthen hole. A lower vertical form system, including multiple interlocking pieces, is assembled and joined at one end to an offset disk member. The disk member of the lower vertical form system is then placed onto the base foam ring in abutting engagement. The form system is then plumbed and positioned, e.g., in relation to one or more layout strings. Once the form system is in the correct position, the earthen hole is backfilled, e.g., with dirt or other material, thus holding the properly positioned form system in place. The lower vertical form system is then cut to grade.

Abstract: A conventionally available pile for civil engineering work is constructed such that the pile has in its inside a core body with wedges that stick into soil deep in the ground and function to prevent the pile from coming out of place. A problem exists with such a pile in that placing the core body at an appropriate position inside the pile is difficult. A pile for civil engineering work of this invention enables a core body to be placed at an appropriate position and labor required for the placement to be reduced. A pile (1) for civil engineering work is characterized in that, for example, a guide rail (4) that enables a core body (6) to be guided is provided inside a body of the pile (1), the core body (6) is guided through the guide rail (4), and wedges (6a, 6b) are appropriately guided to cut/pushed-in openings (2a, 2b, 3a, 3b).

Abstract: This invention relates to a method for forming a mono pile foundation in soil for a wind turbine tower including drilling a plurality of holes into the soil, the plurality of holes being arranged along a curve having a contour corresponding to a cross-dimensional shape of the mono pile, and placing the mono pile in an annular cavity, the annular cavity being formed by the plurality of holes alone and/or by the mono pile breaking up intermediate soil walls between adjacent holes in the plurality of holes while being placed therein. A foundation in soil for a wind turbine tower, a wind turbine comprising such a foundation, and use of such a foundation in a wind turbine is also disclosed.

Abstract: The present invention is an apparatus and a method for casting a cementitious or stone pile into the ground. The present invention comprises an exterior driving casing and an interior mandrel acting in cooperation to hold and deliver the pile forming material. A retrievable driving driving shoe is also disclose.

Abstract: A clamp assembly for securing a vibratory device to a pile comprising a frame, first and second clamp members, and an actuator. The frame is adapted to be secured to the vibratory device. The first clamp member is supported by the frame and comprises a first engaging surface defined by a first surface layer formed of carbide alloy material. The second clamp member is also supported by the frame and comprises a second engaging surface defined by a second surface layer formed of carbide alloy material. The actuator is arranged to displace at least one of the first and second clamp members such that first and second engaging surfaces engage the pile such that the pile is gripped by between first and second clamp members.

Abstract: A circular concrete cap foundation poured in-situ within a perimeter forming corrugated metal pipe set atop or within an excavated pit and enclosing a series of circumferentially spaced pile anchors. The circular concrete cap foundation supports sets of inner and outer circumferentially spaced tower anchor bolts having their lower ends anchored to an embedded anchor ring and their upper ends projecting vertically and upwardly out the top of the circular foundation to engage the base flange of a supported tower. The pile anchors are formed with perimeter corrugated metal pipes set deep in subsurface soils with cementitious material surrounding and partially bonding to a centralized steel bolt or tendon which extends through the cap foundation. The tower anchor bolts and the pile anchor bolts are both partially encased in a PVC sleeve so that the bolts can be post-tensioned. The pile anchors are in tension only and serve to pull the cap foundation down to compress the underlying ground soils.

Abstract: A grout bag assembly (1) is provided comprising an inflatable grout bag (2) (hereinafter termed a primary inflatable grout bag) having a top (4), bottom (6) and at least one side (8) and having in an expanded condition an axis extending between the top and bottom thereof. A secondary, independently inflatable, grout bag (14) expandable in the same direction as the primary inflatable bag is attached to one end of the primary inflatable grout bag. The secondary grout bag is employed, in use, subsequent to be installation of the primary grout bag to compensate for shrinkage in the height of the primary grout bag and to thereby supplement the overall axial dimension of the grout bag assembly, in use.

Abstract: There is provided a system and method for coupling with a shaft. In particular, there is provided a friction shaft coupler that includes a center plate and a plurality of outer plates, wherein the outer plates are configured to abut the center plate. The center plate and the plurality of outer plates each include a shaft bore configured to receive a shaft and a plurality of stub bores. The friction shaft coupler also includes a plurality of stubs, wherein each stub is configured to fit inside one of the plurality of stub bores, the plurality of stubs comprising a plurality of apertures that are perpendicular to a longitudinal axis of the stubs. Additionally, the friction shaft coupler includes a plurality of set screws configured to fit inside the apertures of the stubs, wherein the set screws are accessible for adjustment via access holes in the plurality of outer plates.

Abstract: A system for tracking and monitoring data related to the manufacture, installation and/or life cycle of concrete structures, such as pilings, as well as related system components and methods for tracking, storing and accessing such data is provided. The system utilizes one or more embeddable antenna assemblies as well as sensor packages that are installed in the concrete structure form before casting. The antenna(s) provide wireless communication of the data from the structure. On board memory is also provided to store structure related data with the structure. A system for tracking a pile during driving is also provided.

Abstract: An arrangement for installing building elements, such as piles and tunnel sections, into a ground formation, where a building element is provided. Two or more impact drivers for delivering blows to the element are mounted on or operatively connected to the element. Accordingly, large elements, such as monopiles for wind turbines, which may comprise a steel tube having a diameter in excess of 5 meters, or even tunnel sections, can be installed by utilizing a number of relatively small impact drivers.

Abstract: A foundation slab for a structure is repaired by driving piers into the ground and then lifting the slab against the piers. A bracket assembly is attached between the slab and a jack. One or more jacks are used to drive piers into the ground and to raise the slab. One or more brackets remain installed to support the slab on the piers.

Abstract: In one exemplary embodiment, curved sheet pile is driven underneath an existing conduit using a pile driver guided hydraulically by an excavator or other heavy machinery. By vibrating the curved sheet piles, the soil is placed in suspension, which allows the piles to be directed through the soil along an arcuate path that has a curvature that substantially matches the radius of curvature of the piles. Once the pile is positioned as desired, each individual pile sheet can be welded to one another to form a unitary structure. In one exemplary embodiment, the curved sheet pile is inserted beneath a conduit using a vibratory pile driver that rotates about a fixed pivot element on an excavator or other heavy machine for positioning the pile driver to advance the curved sheet pile along a fixed arc.

Abstract: The invention relates to a drilling implement for installing or erecting a drilling pillar in the ground, having a mast, a carriage displaceably mounted on the mast, a rotary drive located on the carriage for the rotary driving of a drill pipe and a pipe bunker connectable to the drill pipe with a storage area for fill material for filling a drill hole on drawing the drill pipe. According to the invention it is provided that the pipe bunker is axially adjustably mounted with respect to the carriage on said carriage. The invention also relates to a method for installing or erecting a drilling pillar, which can be implemented with a drilling implement according to the invention.

Abstract: A driven pile anchor suitable for securing a tendon of a tension leg platform to the seafloor is supplemented with added weight. The pile may be a conventional driven friction pile installed with an underwater pile hammer. A load frame is added to the individual pile to accommodate ballast weights. Pre-manufactured ballast weights are placed on the frame to increase the holding power of the pile anchor system. The ballast weights may be secured solely by gravity connections, thereby simplifying their installation. In a second embodiment, the pile is intentionally plugged and installed with the plug intact. Pre-manufactured ballast weights are then placed inside the pile and may be held in place by gravity. In a third embodiment, the pile is a conventional driven friction pile installed with an underwater pile hammer. The pile is initially open but subsequently evacuated and intentionally plugged near its pile tip. Pre-manufactured ballast weights are placed inside the pile to increase its holding capacity.

Abstract: A foundation underpinning is disclosed. In some embodiments, the foundation underpinning includes a pile having one or more pile segments and an elongated reinforcing tubular member. Each of the one or more pile segments includes a throughbore passing axially through the head and the trunk. The throughbores of the one or more pile segments are vertically aligned forming a passage through the pile, and the elongated reinforcing tubular is disposed within the passage.

Abstract: A panel pushing assembly (10) for a slide rail system having a first and second wall (12, 14) includes an elongated member (16) having a bottom end (18) and a top end (20), and a guide (40) disposed about the elongated member (16). The guide (40) guides slidable movement along the elongated member (16) and includes a collar (42) engaging the walls (12, 14) of the elongated member (16) and a catch (44) extending laterally from the collar (42) to engage the second wall (14), which is the stationary wall. The collar (42) includes a plurality of side-plates (46) and the catch (44) includes a hook portion (70) extending downwardly along the outside of the second wall (14) for preventing lateral movement of said elongated member (16) relative to the second wall (14).

Abstract: A method and apparatus for constructing soil columns in-situ in the ground are disclosed for the purpose of improving the structure supporting capability of surface soils to support loads from buildings and other structures. Some embodiments use a surcharge ring or load to apply a stress to soil surrounding a construction site for a soil column. Methods according to the present disclosure may reduce impact on the environment because they may be performed with only one piece of normal construction equipment. In addition, gravel, crushed stone, cement or chemicals may not be required.

Abstract: A soil structure tool for building structures in soil, placing structures in soil, or both, may improve the load bearing capability for soil by using multiple devices as part of a single tool. The soil structure tool may be operated to place a first device in a working position while placing the remaining device or devices in a non-working position so the first device in the working position may be used without interference from the remaining tools. Moving devices attached to the soil structure tool between the working and non-working positions permits building structures in soil or placing structures in soil without requiring multiple vehicles or other platforms to hold various devices and without requiring multiple devices to be attached to or detached from a vehicle or other platform.

Abstract: A set of one or more reaming members is secured to a pile mandrel. Each reaming member is moveable between a first position where the reaming member extends a first distance from a center of the pile mandrel, and a second position where the reaming member extends a second distance from the center of the pile mandrel. An apparatus including a pile mandrel and one or more reaming members attached to the mandrel is driven into soil, creating a hole extending down from a surface of the soil. While the reaming member(s) are below the surface of the soil, the reaming member(s) are extended to an extended position; the pile mandrel is rotated with the reaming member(s) extended to ream a section of the hole to a second diameter that is larger than the first diameter; the reaming member(s) are retracted, and the mandrel is removed from the hole.

Abstract: A drain board installing device without an anchor plate is disclosed.

Abstract: A piling machine with high-pressure jet spiral bit, including an underpan, a pile frame, a drill pipe, a drill bit having an upper leaf helix, a lower leaf helix and a middle leaf helix, a power system, a high-pressure concrete casting system and a high-pressure jet grouting system. The drill bit is disposed at the head of the drill pipe and has multiple nozzles disposed thereon, a diameter of the middle leaf helix is constant from the top to the bottom thereof, a diameter of each of the upper leaf helix and the lower leaf helix decreases from the top to the bottom thereof so that the drill bit with upper and lower tines is formed, the drill bit is spiral, the high-pressure jet grouting system is disposed in the drill bit, and the nozzles are disposed on the drill bit. A piling method is also taught herein.

Abstract: A method and apparatus for the repair of damaged piles and a repaired pile assembly are disclosed herein.

Abstract: A system and method for installing aggregate piers is provided. A cylindrical hollow mandrel is driven to a desired depth. Aggregate is fed through the mandrel in steps. The mandrel is raised and driven to tamp the aggregate. Physical members in a tamping head of the mandrel allow aggregate to remain in a cavity formed by the mandrel, and prevent aggregate from entering the mandrel during driving.

Abstract: A method for installing a utility pole and arch-type underbracing has developed by using an extendable excavating unit mounted on an auger crane. The method comprises two steps of excavation that: the primary hole is excavated about 75 cm in depth by extending an arm about 80 cm diameter of the extendable excavation unit. The secondary hole is excavated to have a standard depth for erecting the utility pole. Then, orientation of the arch-type underbracing is determined for setting on the primary hole. An underbracing hook is installed to the arch-type underbracing for lifting and attaching a U-bolt temporarily to the arch-type underbracing by surround the utility pole. A lead wire of the arch-type underbracing is connected to an earth wire of the utility pole. The arch-type underbracing is tightened with the U-bolt surrounded the utility pole. The excavated soil is filling back into the gaps around the utility pole and the holes by tempering.