Anti-floating and waterproofing system and method applied to deep foundation pit in karst water-rich region

Abstract

The invention discloses an anti-floating and waterproofing system and method applied to a deep foundation pit in the karst water-rich region. The anti-floating and waterproofing system comprises a foundation pit body and dewatering wells. The foundation pit body comprises a top plate, a bottom plate and a side wall. The top plate and the bottom plate are arranged on the top surface and the bottomsurface of the foundation pit body correspondingly, are parallel and are perpendicularly and fixedly connected with the side wall. The multiple dewatering wells are arranged at the bottom of the bottom plate, and are characterized in that pipelines which are used for conducting water pumping and grouting are arranged in the dewatering wells and extend to the bottoms of the dewatering wells from the outer wall of the side wall. According to the anti-floating and waterproofing system and method, the multiple dewatering wells which communicate with each other are adopted to achieve the combination of dewatering and grouting, then the floating and water gushing problems of the excavated foundation pit are effectively solved, and the guarantee is provided for the safety construction of the foundation pit.

Description

technical field [0001] The invention relates to the field of foundation pit waterproofing, in particular to an anti-floating and waterproof system and method applied to deep foundation pits in karst water-rich areas. Background technique [0002] The existing anti-floating and waterproof treatment methods for deep foundation pits in karst water-rich areas use drainage or water blocking methods. During drainage, separate drainage between each precipitation well is required, which is time-consuming and laborious, and the effect is not good. In the overall situation, it is very easy for other precipitation wells to overflow and inrush water in the process of dewatering and drainage, and for karst fissure water to interpenetrate and complement each other, local precipitation cannot be effectively controlled; in addition, anti-floating mainly adopts drainage and The method of water blocking fails to integrate the overall structure of the foundation pit with the surrounding rock a...

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Problems solved by technology

[0002] The existing anti-floating and waterproof treatment methods for deep foundation pits in karst water-rich areas use drainage or water blocking methods. During drainage, separate drainage between each precipitation well is required, which is time-consuming and laborious, and the effect is not good. In the overall situation, it is very easy for other precipitation wells to overflow and inrush water in the process of dewatering and drainage, and for karst fissure water to interpenetrate and complement each other, local precipitation cannot be effectively controlled; in addition, anti-floating mainly adopts drainage and The method of water blocking fails to integrate the overall structure of the foundation pit with the surrounding rock and soil, and it is very easy to cause the buoyancy of the underground structure of the foundation pit to be greater than the gravity of the underground structure in the karst water-rich area, eventually causing the foundation pit to float

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