Foundation pit peripheral soil solidification method

Abstract

The invention discloses a foundation pit peripheral soil solidification method, and relates to the field of foundation pit supporting. The foundation pit peripheral soil solidification method comprises the steps that a foundation pit of a muddy soil layer is divided into a plurality of sequentially-excavated layers, fender posts are constructed along the side wall of the foundation pit, and a drainage plate strip, a collecting pipe on the upper part of the drainage plate strip, a connecting pipe on the upper part of the drainage plate strip and a main drainage pipe on the upper part of the drainage plate strip are constructed in soil bodies behind an enclosure wall; and then, the soil body of the first excavation layer is excavated to a primary earth excavation face, a second layer of inner support is constructed, and the soil bodies of the other excavation layers of the foundation pit are excavated according to the excavation sequence until the designed depth of the foundation pit isreached. In the process, the soil bodies behind the foundation pit enclosure wall are subjected to first drainage consolidation under the extrusion action of active soil pressure and passive soil pressure in front of the wall, and a drainage consolidation area gradually moves downwards along with the excavation process. The foundation pit peripheral soil solidification method overcomes the defectsof high construction cost, waste of resources and serious pollution of a traditional muddy soil layer foundation pit support water stop and seepage prevention engineering. Meanwhile, the mechanical property of the soil bodies behind the foundation pit supporting enclosure wall is improved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for solidifying the surrounding soil of a foundation pit in a temporary foundation pit support method. Background technique [0002] At present, a closed water-stop curtain is set on the outside of the foundation pit enclosure structure of the muddy soil layer in China to prevent or reduce the groundwater flowing into the foundation pit at the side wall of the foundation pit and at the bottom of the foundation pit. At the same time, improve the mechanical properties of the soil behind the retaining wall and reduce the deformation of the soil around the foundation pit. curtain. The current technology has the following problems: [0003] 1. The existing water-stop curtain needs a large amount of cement slurry to consolidate the soil during construction, which not only consumes more resources, but also has a relatively high cost. Moreover, during the con...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for solidifying the surrounding soil of the foundation pit to solve the problem of the high cost and waste of resources in the support of the foundation pit in the muddy soil layer in the prior art for waterproofing and anti-seepage , technical problems with serious pollution

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