High-pressure rotary spraying anchor cable structure for building anti-floating and construction method thereof

Abstract

The invention discloses a high-pressure rotary spraying anchor cable structure for building anti-floating and a construction method of the high-pressure rotary spraying anchor cable structure, and relates to the technical field of anti-floating devices for building underground structures. The high-pressure rotary spraying anchor cable structure for building anti-floating and the construction method solve the problems that required grouting bodies are difficult to form, a supporting structure loses effect easily, and the stability and the adaptability are poor. The high-pressure rotary sprayinganchor cable structure comprises a cement paste grouting body, a cement-soil mixture, an upper anchorage device and a lower anchorage device. A structure bottom plate is fixed between the upper anchorage device and the cement-soil mixture. A plurality of anchor cable bodies penetrate through the structure bottom plate, the upper anchorage device and the lower anchorage device. Anti-rust anti-corrosion layers are arranged on the outer surfaces of the anchor cable bodies. A plurality of bearing plates sleeve the anchor cable bodies. By means of the high-pressure rotary spraying anchor cable structure for building anti-floating and the construction method, the sealing of an underground water seeping channel in a hole is realized. Due to the adoption of the cement-soil mixture, an actual supporting effect is achieved, the supporting structure is easier to form, and the pouring effect is better. Meanwhile, wet operation is realized by means of a high-pressure rotary spraying mode, the dustpollution is small, and the influence on the environment is small.

Description

technical field [0001] The invention relates to the technical field of anti-floating devices for building underground structures, in particular to a high-pressure jet grouting anchor cable structure and a construction method for anti-floating of buildings. Background technique [0002] Anti-floating anchor rod is a kind of anti-floating measures for underground structures in construction projects. The anti-floating anchor refers to the structural member set up to resist the upward displacement of the building on it, which is related to the level and change of the groundwater level, and is opposite to the force direction of the compression pile. [0003] The authorized notification number is the Chinese patent of CN108952785A, which proposes a high-grip anchor cable structure, which includes at least one anchor cable steel strand arranged in the borehole, and the anchor cable steel strand is covered with an anchor cable When grouting into the borehole to form a grouting body...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the pile hole needs to be formed first, then the anchor cable steel strand is placed in the pile hole, and then the hose is put into the pile hole for grouting to form a supporting structure. In the actual application process, due to the high groundwater level in some areas, the construction of the support structure after the foundation pit is excavated to the design elevation will cause a series of problems: The groundwater is easy to overflow into the pile hole. During the grouting process through the hose, the grout overflows from the pile hole due to the buoyancy of the groundwater, so it is difficult to form the required grouting body, and even if it is formed, the grouting body is unstable. , groundwater will still seep out along the perimeter, resulting in failure of the support structure, poor stability and adaptability, and easy waste of resources

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