Method for supporting foundation pit by using frozen soil wall: Fid-Bau Portal

Method for supporting foundation pit by using frozen soil wall

WANG BO / ZHAO XINJIE / LIAO XIANBIN

The invention relates to the technical field of constructional engineering, and provides a method for supporting a foundation pit by using a frozen soil wall, the method is based on a plurality of holes formed in the outer side of the foundation pit, and freezing pipes or auxiliary pipes are arranged in the holes; a water outlet is formed in the auxiliary pipe; the depth of the holes is higher than the water level of underground water, and the holes comprise freezing holes and auxiliary holes; the freezing holes and the auxiliary holes are formed in the outer side of the foundation pit in a grid mode. A plurality of holes are formed in the outer side of a foundation pit, firstly, freezing pipes or auxiliary pipes are arranged in the holes, secondly, the moisture content of a soil layer is measured, then the moisture content of the soil layer is adjusted through the auxiliary pipes till the frozen moisture content is reached, and then the soil layer around the foundation pit is frozen through the freezing pipes to form a frozen soil wall. And finally, the freezing effect is analyzed through real-time temperature measurement of the auxiliary pipe, and based on the method, the freezing property and the freezing speed of the soil layer can be improved, the freezing effect is enhanced, and resource loss is reduced.

本发明涉及建筑工程技术领域，提供了一种使用冻土墙进行基坑支护的方法，所述方法基于在基坑外侧设置的若干孔，并在孔内布置冻结管或辅助管；所述辅助管上设有出水口；所述孔的深度高于地下水的水位线，包括冻结孔和辅助孔；所述冻结孔和辅助孔栅格式设置在基坑外侧。本发明在基坑外侧设置若干孔，首先在孔内布置冻结管或辅助管，其次测定土层的含水率，再次通过辅助管对土层进行含水率调节工作直至达到冻结含水率，然后通过冻结管对基坑周围的土层进行冻结形成冻土墙，最后利用辅助管实时测温分析冻结效果，基于此方法可提高土层的可冻性和冻结速度、加强冻结效果、减少资源损耗。

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