Abstract: A device and a method for treating soft soil foundations, the device comprises: a drainage plate (4), a water collection well (7), and a pressurizing drainage pipe (6), the pressurizing drainage pipe (6) is connected to the bottom of the drainage plate and the bottom of the water collection well through pipelines; a pressurizing module comprises: film (12), the film (12) is impermeable and covers the soft soil foundation; a pile-loading body (13), the pile-loading body (13) is arranged on the film; air compressor (1) has a pressurizing end with a space below the film to make a soil layer of the soft soil foundation below the film under an air pressure higher than the atmospheric pressure, so that the underground water discharge process can be started.

Abstract: A device and a method for treating soft soil foundations, the device comprises: a drainage plate (4), a water collection well (7), and a pressurizing drainage pipe (6), the pressurizing drainage pipe (6) is connected to the bottom of the drainage plate and the bottom of the water collection well through pipelines; a pressurizing module comprises: film (12), the film (12) is impermeable and covers the soft soil foundation; a pile-loading body (13), the pile-loading body (13) is arranged on the film; air compressor (1) has a pressurizing end with a space below the film to make a soil layer of the soft soil foundation below the film under an air pressure higher than the atmospheric pressure, so that the underground water discharge process can be started.

Abstract: A self-starting negative pressure drainage system for draining groundwater in a slope, includes: a declined borehole, a pipe boot, a permeable pipe and a drain pipe; wherein the declined borehole is divided into a permeable drilling section and a sealed grouting drilling section; wherein the permeable drilling section is on a lower portion of the declined borehole, and the sealed grouting drilling section is on an upper portion of the declined borehole; a water stop ring made of water-expanding rubber is provided between the permeable drilling section and the sealed grouting drilling section; the permeable drilling section comprises the permeable pipe; a top of the permeable pipe contacts the water-expanding rubber; a cavity is formed in the permeable pipe, an inlet of the drain pipe passes through the water stop ring made of water-expanding rubber and is inserted into the permeable pipe.

Abstract: A self-drainage anchor cable system is provided, wherein a drainage section (15) is arranged above the internal anchoring section (14) of an anchor cable; a first end of the steel strand (2) extends into a bottom of the borehole (1); the isolation pipe (3) is sleeved on the steel strand (2) in the drainage section (15), and the permeable pipe (4) is sleeved on the isolation pipe (3); a length of the isolation pipe (3) is larger than a length of the permeable pipe (4), and there is a space (5) between the isolation pipe (3) and the permeable pipe (4); the water stop rings made of water-expanding rubber (6) are provided at both ends of the isolation pipe (3), and end portions of the permeable pipe (4) are in contact with the water-expending rubber water stop rings (6) A construction method for the self-drainage anchor cable system is also provided.

Abstract: A self-drainage anchor cable system is provided, wherein a drainage section (15) is arranged above the internal anchoring section (14) of an anchor cable; a first end of the steel strand (2) extends into a bottom of the borehole (1); the isolation pipe (3) is sleeved on the steel strand (2) in the drainage section (15), and the permeable pipe (4) is sleeved on the isolation pipe (3); a length of the isolation pipe (3) is larger than a length of the permeable pipe (4), and there is a space (5) between the isolation pipe (3) and the permeable pipe (4); the water stop rings made of water-expanding rubber (6) are provided at both ends of the isolation pipe (3), and end portions of the permeable pipe (4) are in contact with the water-expending rubber water stop rings (6) A construction method for the self-drainage anchor cable system is also provided.

Abstract: A self-starting negative pressure drainage system for draining groundwater in a slope, includes: a declined borehole, a pipe boot, a permeable pipe and a drain pipe; wherein the declined borehole is divided into a permeable drilling section and a sealed grouting drilling section; wherein the permeable drilling section is on a lower portion of the declined borehole, and the sealed grouting drilling section is on an upper portion of the declined borehole; a water stop ring made of water-expanding rubber is provided between the permeable drilling section and the sealed grouting drilling section; the permeable drilling section comprises the permeable pipe; a top of the permeable pipe contacts the water-expanding rubber; a cavity is formed in the permeable pipe, groundwater is capable of penetrating into the cavity via the permeable pipe; an inlet of the drain pipe passes through the water stop ring made of water-expanding rubber and is inserted into the permeable pipe; a gap between the drain pipe and the drillin