Anhydrous construction structure of foundation pit foundation surface under sandy gravel and mudstone geological conditions

Abstract

The invention discloses an anhydrous construction structure of a foundation pit base under sandstone and mudstone geological conditions, which comprises: 1) foundation pit drainage system, which includes a foundation pit side wall drainage system and a foundation pit bottom drainage system, the Foundation pit side wall drainage system is communicated with described foundation pit bottom drainage system; 2) sump well, it is arranged on the bottom of foundation pit, and described sump well is communicated with described foundation pit bottom drainage system to collect the water at foundation pit bottom into the water collection well; 3) pumping and drainage system, which is arranged at the water collection well, and is used to discharge the water in the water collection well. The invention has the advantages of simple installation and operation, effectively prevents groundwater from seeping into the foundation pit, effectively compensates for the deficiency of the well point dewatering method, and reduces the safety hazard of foundation pit construction with water; while pumping and draining water, it does not affect the construction of the foundation pit. The water-free construction of the base surface of the foundation pit is realized; when the centralized pumping and drainage device system is sealed, the water pump is recovered from the device, which also saves the input cost of the project.

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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