Seepage characteristics of foundation pit with horizontal curtain in strong permeable stratum

被引：0
|
作者：
Sun X. [1 ]
Shi C. [1 ]
Cao C. [2 ]
Liu S. [3 ]
Lei M. [1 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] College of Civil and Transportation Engineering, Shenzhen University, Shenzhen
[3] Guangzhou Metro Design and Research Institute Co., Ltd., Guangzhou
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2021年 / 51卷 / 06期
关键词：
Horizontal curtain; Seepage test; Strong permeable stratum; Subway foundation pit; Waterproof curtain design;
D O I：
10.3969/j.issn.1001-0505.2021.06.012
中图分类号：
学科分类号：
摘要：
To study the seepage characteristics of foundation pits with horizontal curtains in strong permeable strata, based on the Darcy's seepage law, foundation pit seepage calculation models with horizontal curtains were established. The theoretical solutions of the water inflow in the foundation pit and the water pressure at the bottom of the curtain were derived. The reliability of the theoretical calculation method was verified by the indoor seepage test. The effects of the seepage coefficient ratio, the thickness of the curtain and the distance between the curtain and the pit bottom on the seepage of the foundation pit were analyzed. The results show that the ratio of hydraulic conductivity plays a leading role in the seepage flow. When the seepage coefficient ratio is 0.01, the water inflow is only 10% of that without curtains. The thickness of the curtain has a little effect on seepage while the position of the curtain has almost no effect on seepage. It is recommended that the ratio of hydraulic conductivity of the horizontal curtain in a strong permeable stratum should not be higher than 0.01, and the thickness should not be less than 4 m. © 2021, Editorial Department of Journal of Southeast University. All right reserved.
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页码：1002 / 1008
页数：6
相关论文
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