Anchor cable construction method under condition of water-rich sand layer

Abstract

The invention discloses an anchor cable construction method under the condition of a water-rich sand layer, relates to the technical field of building construction, and solves the problems that due tothe fact that a sand layer in the prior art is too high in water content, the high risk phenomenon of water gushing and sand gushing is caused, and consequently the construction risk is increased. According to the technical scheme, the anchor cable construction method under the condition of the water-rich sand layer is characterized by comprising the steps that S1, earth excavation is performed,and an anchor cable hole is positioned; S2, a casing pipe is installed, and the casing pipe is refrigerated before the casing pipe is installed and inserted; S3, rotary drilling of a lead hole is performed, meanwhile, filling of liquid nitrogen for heat absorbing is performed, and nitrogen is sucked out; S4, an anchor cable is installed, and primary grouting is performed; S5, anchor pile construction is performed, and secondary grouting is performed; and S6, the anchor cable is tensioned and locked, and the purposes of decreasing the flowing speed of underground water, lowering the risk of water gushing and sand gushing caused by flowing of the underground water in the construction process and improving the construction safety are achieved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to an anchor cable construction method under the condition of water-rich sand layer. Background technique [0002] With the acceleration of urbanization, the available space in cities is getting less and less, more and more buildings are developing underground, and underground space technology has been widely used. The excavation of deep foundation pits will also increase accordingly. The wide application of anchor cables brings more choices to the design of foundation pit support. Compared with internal support, the type of pile-anchor support provides convenience for subsequent construction. construction conditions. During the construction process, the reliability of the performance of the anchor cable determines the safety of the foundation pit support. [0003] Before installing the anchor cable, it is generally necessary to drill a hole to form the anchor cable ...

AI Technical Summary

Problems solved by technology

[0003] Before installing the anchor cable, it is generally necessary to drill a hole to form the anchor cable hole. At the same time, the shape of the anchor cable hole increases the difficulty of construction, especially for the sand layer rich in groundwater. During the hole forming process, the hole collapses while drilling. And with the increase of the anchor cable opening depth, the groundwater content is increasing, and the pressure of the confined water is also increasing, so the risk of water gushing and sand gushing is also increasing, thus greatly increasing the construction cost. risk

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