An auger-suction type metro jet system (MJS) device for aerated and lightweight cement soil includes a multi-pipe device, an outer sleeve, an integrated device, a spiral conveyor, a reamer head, a pressure monitoring system, a mass measuring device, and a control console. The multi-pipe device integrates a backup pipe, a negative-pressure gas pipe, a hydraulic pipe, a negative-pressure water pipe, a pressure sensor wire pipe, a pressure water pipe, a backup gas pipe, a power wire pipe, and at least one grouting tremie unit. The spiral conveyor includes a shaft-type spiral conveying belt and a negative-pressure device. A construction method for foundation reinforcement construction includes: cutting soil by the reamer head; crushing gravel by a gravel crusher; transporting, by the shaft-type spiral conveying belt, a soil-water mixture to a waste liquid tank; monitoring, by the mass measuring device, a mass of the soil-water mixture discharged; and injecting equal-mass cement.

The invention relates to a soil working device for creating a substantially vertically running hole in the ground, which hole is provided with a slurry, said soil working device having a base body, a connection apparatus which is arranged on an upper end region of the base body, and a soil removal apparatus and/or a soil displacement apparatus, which is arranged on a lower end region of the base body. According to the invention is intended that, at a lower region of the base body, a first pressure measuring apparatus for measuring a first ambient pressure is arranged, and that at an upper region of the base body, which is vertically spaced apart from the lower region, a second pressure measuring apparatus for measuring a second ambient pressure is arranged. The invention also comprises a method for creating a substantially vertical hole in the ground by means of such a soil working device.

A pile system for permafrost comprising a pilot hole, at least one pile, and frozen slurry. The pilot hole is formed to a pilot hole depth. The at least one pile is arranged at least partly within the pilot hole and extends to a pile string depth. The frozen slurry is within the pilot hole and is at least partly around the at least one pile.

A pipe assembly may have one or more pipe segments that are coupled together or coupled to a drive socket by a coupler. The bottom-most segment may have a body with a central axis, an exterior surface an upper end connectable to the pile assembly, a digging end, the digging end facilitating the creation of a borehole, and ports through which fluid is emittable. The bottom-most segment is designed to receive fluid introduced through the pipe assembly so that the fluid can facilitate the creation of a borehole and may be emitted through the ports during the driving of the pipe assembly into soil.

A method for improving ground is capable of improving the strength or quality of an underground consolidated body formed by reducing the ratio of water to a rich-mixed solidification material (a cement) (W/C), assuredly carrying the solidification material from a feed source to a jet device, and reducing the amount of solidification material treated as an industrial waste in a construction process. The method for improving ground includes a step of drilling a drilling hole in the ground to be improved, a step of moving (pulling up) a jet device in a vertical direction by rotating the same while the jet device is inserted into the drilling hole and a fluid for cutting the ground (a stable liquid or a partition forming material) is injected from the jet device, and a step of injecting a solidification material from the jet device.

A pipe assembly may have one or more pipe segments that are coupled together or coupled to a drive socket by a coupler. The bottom-most segment may have a body with a central axis, an exterior surface an upper end connectable to the pile assembly, a digging end, the digging end facilitating the creation of a borehole, and ports through which fluid is emittable. The bottom-most segment is designed to receive fluid introduced through the pipe assembly so that the fluid can facilitate the creation of a borehole and may be emitted through the ports during the driving of the pipe assembly into soil.

A pile system for permafrost comprising a pilot hole, at least one pile, and frozen slurry. The pilot hole is formed to a pilot hole depth. The at least one pile is arranged at least partly within the pilot hole and extends to a pile string depth. The frozen slurry is within the pilot hole and is at least partly around the at least one pile.

This invention relates generally to mixing deep soil with a ground or floating based rig system with a single or multi-axial system. In one example embodiment methods, apparatus, and systems are described for deep soil mixing tools or rigs with a rotary axial design, namely with more than one axial mixing elements and associated structures, such that a purpose may be to provide for ground modification improvement.

A pipe assembly may have one or more pipe segments that are coupled together or coupled to a drive socket by a coupler. The bottom-most pipe segment being a bottom pile segment that may have a body with a central axis, an exterior surface an upper end connectable to the pipe pile assembly, and a bottom end, the bottom end inhibiting grout from passing through the bottom end, helical flights extending from the exterior surface of the body substantially perpendicular to the central axis, and grout ports through which the grout is emittable. The bottom pipe segment is designed to receive grout introduced through the pipe assembly so that the grout can be emitted the grout ports during the driving of the pile assembly into soil. The emitted grout forms a grout/soil mixture jacket within the disturbed soil along an exterior of the pipe pile assembly which adds appreciably to the overall stability, and particularly the lateral stability, of the pipe pile column created.

A method for lifting and repairing a foundation is disclosed. The method includes digging a well in at least one lateral surface of the foundation, installing a shear plate to the at least one lateral surface of the foundation inside the opening of the well, further digging the well to a maximum depth of 6 m, compacting a bottom surface of the well at the maximum depth of 6 m, forming a layer of gravel, compacting the layer of the gravel, placing a double column inside the well, pouring a plurality of gravel particles into the well, forming a cemented gravel layer by injecting cement slurry into the well to fill empty spaces among the plurality of gravel particles, installing a tensile system on top of the double column, forming at least a vacant space between the foundation and ground by lifting the foundation from the ground using the tensile system, and fixing the foundation by injecting cement slurry into the vacant space.