Drainage pressure relief anti-floating system suitable for weakly permeable soft stratum

Patent metadata

Field	Value
Publication number	US-12565752-B2
Application number	US-202218557059-A
Country	US
Kind code	B2
Filing date	Oct 31, 2022
Priority date	Dec 8, 2021
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

Disclosed in the present invention is a drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum. The drainage pressure relief anti-floating system comprises a pressure relief well body and an artificial hydrophobic layer, wherein longitudinal bars are arranged in stand columns of a sand-free concrete well wall, and are anchored into concealed beams. The pressure relief well body is located in the artificial hydrophobic layer, a construction surface of the artificial hydrophobic layer is located on the weakly permeable soft stratum, a wicker fence layer is laid on the weakly permeable soft stratum, a biaxially stretched plastic geogrid is laid on the wicker fence layer, a medium coarse sand layer is laid on the biaxially stretched plastic geogrid, and a crushed stone layer is laid on the medium coarse sand layer.

First claim

What is claimed is:

1 . A drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum, comprising an artificial hydrophobic layer, a structural floor, several pressure relief well bodies arranged under the structural floor and a self-contained sump of a construction,
the pressure relief well bodies and the sump being in communication via a steel-plastic composite pipe; the artificial hydrophobic layer being arranged on an outer side of a periphery of the pressure relief well bodies and being located in a weakly permeable soft stratum, and the artificial hydrophobic layer comprising a wicker fence layer, a biaxially stretched plastic geogrid, a medium coarse sand layer and a crushed stone layer arranged in sequence from bottom to top, wherein spiral stirrups are provided outside a pipe wall of the steel-plastic composite pipe.

2 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 1 , wherein the steel-plastic composite pipe is embedded in or under the structural floor.

3 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 1 , wherein the biaxially stretched plastic geogrid has an open porosity of not less than 60%.

4 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 1 , wherein the medium coarse sand layer has a thickness of at least 200 mm, and a sediment percentage of not more than 0.5%.

5 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 1 , wherein the crushed stone layer has a thickness of at least 300 mm, a particle size of 5-20 mm and a sediment percentage of not more than 0.5%.

6 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 1 , wherein a geotextile layer, a plain concrete cushion layer and a waterproof layer are laid in sequence on the crushed stone layer.

7 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 6 , wherein the crushed stone layer is covered with a waterproof color strip cloth layer when the plain concrete cushion layer is not cast and is subject to rainfall.

8 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 1 , wherein well walls of the pressure relief well bodies are provided with stand columns, longitudinal bars are arranged in the stand columns, and top portions of the longitudinal bars are anchored into concealed beams, a section of the longitudinal bars anchored into the concealed beams is provided with a bending portion, and the concealed beams are arranged on the structural floor.

9 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 2 , wherein well walls of the pressure relief well bodies are provided with stand columns, longitudinal bars are arranged in the stand columns, and top portions of the longitudinal bars are anchored into concealed beams, a section of the longitudinal bars anchored into the concealed beams is provided with a bending portion, and the concealed beams are arranged on the structural floor.

10 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 3 , wherein well walls of the pressure relief well bodies are provided with stand columns, longitudinal bars are arranged in the stand columns, and top portions of the longitudinal bars are anchored into concealed beams, a section of the longitudinal bars anchored into the concealed beams is provided with a bending portion, and the concealed beams are arranged on the structural floor.

11 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 4 , wherein well walls of the pressure relief well bodies are provided with stand columns, longitudinal bars are arranged in the stand columns, and top portions of the longitudinal bars are anchored into concealed beams, a section of the longitudinal bars anchored into the concealed beams is provided with a bending portion, and the concealed beams are arranged on the structural floor.

12 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 5 , wherein well walls of the pressure relief well bodies are provided with stand columns, longitudinal bars are arranged in the stand columns, and top portions of the longitudinal bars are anchored into concealed beams, a section of the longitudinal bars anchored into the concealed beams is provided with a bending portion, and the concealed beams are arranged on the structural floor.

13 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 6 , wherein well walls of the pressure relief well bodies are provided with stand columns, longitudinal bars are arranged in the stand columns, and top portions of the longitudinal bars are anchored into concealed beams, a section of the longitudinal bars anchored into the concealed beams is provided with a bending portion, and the concealed beams are arranged on the structural floor.

14 . The drainage pressure relief anti-floating system suitable for a weakly permeable soft stratum according to claim 7 , wherein well walls of the pressure relief well bodies are provided with stand columns, longitudinal bars are arranged in the stand columns, and top portions of the longitudinal bars are anchored into concealed beams, a section of the longitudinal bars anchored into the concealed beams is provided with a bending portion, and the concealed beams are arranged on the structural floor.

Assignees

• Univ South China Tech

Inventors

• Luo Guanyong
• Yang Fei
• Pang Hong
• Cao Hong

Classifications

• E02D31/02

  against ground humidity or ground water {(E02D31/06 takes precedence; arrangements other than according to E02D31/04; against hydraulic pressure of groundwater E02D31/10)} · CPC title

• E02D3/10

  by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains (E02D3/11 takes precedence; soil-penetrating vibrators with auxiliary watering E02D3/054; drainage of soil in general E02B11/00) · CPC title

• E02D31/12 Primary

  against upward hydraulic pressure · CPC title