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ORIGINAL RESEARCH article

Front. Earth Sci.
Sec. Solid Earth Geophysics
Volume 12 - 2024 | doi: 10.3389/feart.2024.1523165
This article is part of the Research Topic Advanced Materials and Technologies for Sustainable Development of Underground Resources View all 23 articles

Research on the deformation mechanism and law caused by the influence of seepage on foundation pit dewatering

Provisionally accepted
Qingyuan Yang Qingyuan Yang 1Song Chen Song Chen 2*
  • 1 Guangzhou Panyu Polytechnic, Guangzhou, Guangdong Province, China
  • 2 Hebei GEO University, Shijiazhuang, China

The final, formatted version of the article will be published soon.

    Abstract：The thickness of aquifer is relatively large，the aquifer is not completely isolated by the diaphragm wall, and the water flow inside and outside the foundation pit flows at the bottom of the diaphragm wall. This article reports indoor experiments and theoretical methods which are used to study the deformation mechanism and law caused by dewatering in foundation pit under the condition of incomplete isolation of the inner and outer aquifers of the foundation pit based on typical geological conditions in South China. Our findings are as follows. (1) Through the experimental analysis of the mechanism of groundwater seepage around the foundation pit, the effective influence depth of precipitation in the foundation pit is greater than that outside the foundation pit, and the effective influence depth of double well precipitation is greater than that of single well precipitation.(2) The surface settlement outside the pit caused by dewatering in the foundation pit is mainly concentrated in the surrounding seepage area, and the change value of surface settlement outside the pit caused by double well dewatering is 2~3 times greater than that caused by single well dewatering. (3)The lateral displacement of diaphragm wall increases by 24% compared with that without reinjection. The maximum lateral displacement of the diaphragm wall is 0.09% of the precipitation depth when the whole well is tilted at 10°for reinjection, and the lateral displacement of the diaphragm wall increases by 13% compared with that without reinjection. The full well depth recharge with an inclination of 20°has the least impact on the diaphragm wall, and the recharge effect is the best.The above results can be provided as theoretical foundation for the study of the deformation mechanism and law caused by dewatering in foundation pit.

    Keywords: ：foundation pit dewatering, Model Test, effective influencing depth, Dewatering curve, deformation law；reinjection form

    Received: 05 Nov 2024; Accepted: 26 Dec 2024.

    Copyright: © 2024 Yang and Chen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Song Chen, Hebei GEO University, Shijiazhuang, China

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