Foundation pit base face water-free construction structure under sandy gravel and mudstone geological conditions

Abstract

The invention discloses a foundation pit base face water-free construction structure under sandy gravel and mudstone geological conditions. The structure comprises a foundation pit drainage system, awater collecting well and a water pumping and draining system, wherein 1) the foundation pit drainage system comprises a foundation pit side wall drainage system and a foundation pit bottom drainage system, and the foundation pit side wall drainage system communicates with the foundation pit bottom drainage system; 2) the water collecting well is arranged at the bottom of a foundation pit, and thewater collecting well communicates with the foundation pit bottom drainage system so as to collect water at the bottom of the foundation pit into the water collecting well; and 3) the water pumping and draining system is arranged at the water collecting well and is used for draining the water in the water collecting well. The structure is easy to install and operate, the underground water is effectively prevented from permeating into the foundation pit, the defects of a well point dewatering method are effectively overcome, and the potential safety hazard of water-carrying construction of thefoundation pit is reduced; construction of the foundation pit is not affected while the water is pumped and drained, and water-free construction of the base face of the foundation pit is truly achieved; and when the centralized water pumping and draining device system is sealed, a water pump is recovered from the device, and the investment cost of a project is also saved.

Description

technical field [0001] The invention belongs to the field of foundation pit engineering. More specifically, the invention relates to an anhydrous construction structure of foundation pit base under the geological conditions of sandy pebbles and mudstone. Background technique [0002] In recent years, foundation pit engineering dewatering and drainage technology has become more and more common in foundation pit engineering. In the process of this work, the selection of drainage measures is more important and is the core element of the whole project. Under the geological conditions of sandy pebbles and mudstone, due to the limitation of geological conditions, the traditional well point dewatering construction method cannot completely reduce the water below the base of the foundation pit. Generally, it is necessary to adopt the dewatering measures of the foundation pit exposed row, resulting in the construction of the foundation pit. There are often water-carrying operations,...

AI Technical Summary

Problems solved by technology

Under the geological conditions of sandy pebbles and mudstone, due to the limitation of geological conditions, the traditional well point dewatering construction method cannot completely reduce the water below the foundation pit base. Generally, it is necessary to adopt the dewatering measures of the foundation pit exposed row, resulting in the construction of the foundation pit. There are often water-carrying operations, which seriously affect the safety, quality and progress of the project. Therefore, the problem of groundwater treatment plagues the foundation pit excavation project

At the same time, the sealed pouring of the water collection well and how to take out the pumping equipment during pouring are also existing problems. Now most construction units choose to pour the water pump together with the water collection well to prevent groundwater from gushing out of the base surface. However, the investment cost is relatively high and the waterproof effect is not ideal. In the later stage, the location of the water collection well needs to be treated again for water sealing and leak plugging

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