Provided is a ground reinforcement structure installed on a ground (10) in which a sandy soil layer (11) having a weak surface layer is provided and thus large-caliber excavation is difficult to be performed, the ground reinforcement structure including a ground reinforcement material (100) including: an expansion-type steel pipe (110) inserted to be installed in a small-caliber drilled portion (A) having a diameter of 51 mm to 61 mm and expanded by hydraulic pressure; and a settlement member (120) coupled to a rear end of the expansion-type steel pipe (110). Here, the expansion-type steel pipe (110) is inserted into the sandy soil layer (11), and the settlement member (120) is inserted into a rock layer (12). In this case, the settlement member (120) of the ground reinforcement structure according to the present invention is fixed to the rock layer (12), fixing force is excellent.

A strand pressure-pipe anchor comprises a compression anchor base element, a tension strand or a plurality of tension strands, and at least one sheath, in which the tension strand or at least one of the tension strands is received. The tension strand or at least one of the tension strands is provided, at the end thereof associated with the compression anchor base element, with a crimp sleeve, which is provided with an external thread, which, in a connected state of the tension strand and the compression anchor base element where the tension strand is connected to the compression anchor base element to pass on the anchoring forces to the surrounding substratum, is in screw engagement with an internal thread of the compression anchor base element.

A friction bolt including an elongated metal tube and a plurality of friction members. The metal tube includes interior and exterior surfaces, a tapered distal end portion, a proximal end portion, and a slit extending along a length of the elongated metal tube. The plurality of friction members extend outward from the exterior surface, and at least some of the friction members have an exposed planar portion to frictionally engage an inner surface of a bore within which the friction bolt is inserted.

A tool for an offshore wind power foundation pile includes a steel pipe pile, a pile core, a pile cap, and a pile shoe. A cutting shoe portion is arranged at a bottom of the steel pipe pile, and an outer diameter of the pile shoe is larger than an outer diameter of the cutting shoe portion; the pile cap is detachably connected to the top of the steel pipe pile; the pile core is located in the steel pipe pile, the pile core is detachably connected to the pile shoe, and a length of the pile core is larger than or equal to a length of the steel pipe pile; the pile cap is further provided with a pile core accommodating groove and a pile core limiting portion; the pile core limiting portion includes a pile core limiting block and a limiting hole.

A ground anchor system configured for introducing into a borehole, and comprising a plurality of straps each having a length dimension extending along a central longitudinal axis of the ground anchor system. Each of said straps has a width dimension taken along a major axis and a thickness dimension taken along a minor axis. The major axis and the minor axis are disposed at a transverse plane of the ground anchor system and intersect at a middle point. The middle point of each of said straps is intersected by an imaginary line extending through the longitudinal axis at the transverse plane. The imaginary line forms an angle smaller than 90 with the major axis of the respective strap.

A ground anchor system configured for introducing into a borehole, and comprising a plurality of straps each having a length dimension extending along a central longitudinal axis of the ground anchor system. Each of said straps has a width dimension taken along a major axis and a thickness dimension taken along a minor axis. The major axis and the minor axis are disposed at a transverse plane of the ground anchor system and intersect at a middle point. The middle point of each of said straps is intersected by an imaginary line extending through the longitudinal axis at the transverse plane. The imaginary line forms an angle smaller than 90 with the major axis of the respective strap.

In general, embodiments of the present invention relate to ground anchor assemblies. Specifically, the present invention provides a multi-stage extending ground anchor assembly including wing members that are coupled to a fixing member of the ground anchor assembly. The wing members are configured to make contact with an inner wall of a ground hole such that the earth anchor assembly can be used in surfaces of any consistency, including both bedrock and soft surfaces.

The tie rod for structural projects for the protection of structures for earthquake and wind is comprised of a cast iron base (7) which has a bolt (4) passing through a hole, which is surrounded by threaded ring (5) with handles (6). A base plate (2) that sits on the bolt and turns with a ball bearing. A steel cable (9) passes through all; the one end of the cable is fixed to the base (2) with bolts (3). The other end leads to a member with blades around it (10), (12), (13), (14) which open and close around the member (17) with the help of bars (11) connected around the axis of the member with pins. To the other end, they are connected with pins to the blades. The rod presses the structure to the ground by a bolt connected to a cable which pulls a member (17) with blades which open against the sides of a hole drilled on the ground and pull the building towards the ground decreasing torque created by the forces of an earthquake or the wind. It is used on buildings with a frame, continuous building, wood frame houses with storm problems, cable bridges, loose ground slopes, etc.

The tie rod for structural projects for the protection of structures for earthquake and wind is comprised of a cast iron base (7) which has a bolt (4) passing through a hole, which is surrounded by threaded ring (5) with handles (6). A base plate (2) that sits on the bolt and turns with a ball bearing. A steel cable (9) passes through all; the one end of the cable is fixed to the base (2) with bolts (3). The other end leads to a member with blades around it (10), (12), (13), (14) which open and close around the member (17) with the help of bars (11) connected around the axis of the member with pins. To the other end, they are connected with pins to the blades. The rod presses the structure to the ground by a bolt connected to a cable which pulls a member (17) with blades which open against the sides of a hole drilled on the ground and pull the building towards the ground decreasing torque created by the forces of an earthquake or the wind. It is used on buildings with a frame, continuous building, wood frame houses with storm problems, cable bridges, loose ground slopes, etc.

Method and apparatus for enhancing capacity of piles and/or anchors, which can include any type of piles and/or anchors, including but not limited to micropiles and soil nail, by disposing a tube or casing into the earth and then laterally expanding at least a portion of the casing, in plastic deformation, using an expansion member such that an enlarged area is formed in the casing. The casing can then optionally be left in place and filled with a filler material and/or can optionally be forcibly pulled out of the ground, thus compacting and thereby densifying the surrounding soil, and the thusly formed enlarged hole can be filled with a filler material and used as an anchor and/or pile. Optionally, in one embodiment, existing piles and/or anchors can be re-used by lowering an expansion member into them and creating one or more laterally expanded areas.