Experimental study on well group connectivity test of a foundation pit with aquifer-penetrating cut-off wall

CHEN Lü; WEI Zhengping; HU Lei; CHENG kai; WANG Zixuan

doi:10.20265/j.cnki.issn.1007-2993.2025-0118

Volume 40 Issue 3

Jun. 2026

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CHEN Lü, WEI Zhengping, HU Lei, CHENG kai, WANG Zixuan. Experimental study on well group connectivity test of a foundation pit with aquifer-penetrating cut-off wall[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(3): 423-429. doi: 10.20265/j.cnki.issn.1007-2993.2025-0118

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CHEN Lü, WEI Zhengping, HU Lei, CHENG kai, WANG Zixuan. Experimental study on well group connectivity test of a foundation pit with aquifer-penetrating cut-off wall[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(3): 423-429. doi: 10.20265/j.cnki.issn.1007-2993.2025-0118

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Experimental study on well group connectivity test of a foundation pit with aquifer-penetrating cut-off wall

doi: 10.20265/j.cnki.issn.1007-2993.2025-0118

1.
China Machinery TIDI Geotechnical Engineering Co., Ltd., Wuhan 430000, Hubei, China
2.
Zhengyu Kechuang (Wuhan) Geotechnical Engineering Co., Ltd., Wuhan 430000, Hubei, China
3.
Nanjing Nanda Geotechnical Engineering Technology Co., Ltd. Hubei Branch, Wuhan 430000, Hubei, China

Received Date: 2025-03-17
Accepted Date: 2025-06-26
Rev Recd Date: 2025-05-12

Available Online: 2026-06-08

Publish Date: 2026-06-08

Abstract

Abstract

Cut-off walls penetrating the aquifer are commonly adopted for seepage isolation in deep foundation pit projects in high artesian water areas, so as to reduce the impact of dewatering on the surrounding environment. However, the current evaluation methods for the seepage control effect of cut-off walls penetrating the aquifer remain inadequate. For a deep foundation pit project in Wuhan, the groundwater control scheme combines the CSM cut-off wall penetrating the aquifer with internal well dewatering. To predict the water inflow of the foundation pit and evaluate the seepage control effect of the cut-off wall, a multi-level pumping test with a well group was carried out. By obtaining the data of water level drawdown inside and outside the foundation pit as well as the water inflow information, the subsequent water inflow of the foundation pit was predicted prior to earth excavation. Preliminary judgment shows that the CSM cut-off wall penetrating the aquifer achieves a favorable seepage control effect. This method can provide a reference for the evaluation of cut-off walls penetrating the aquifer.
- CSM,
- aquifer-penetrating cut-off wall,
- well group connectivity test,
- multi-level pumping test,
- water inflow

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References(20)

References

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Experimental study on well group connectivity test of a foundation pit with aquifer-penetrating cut-off wall

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Experimental study on well group connectivity test of a foundation pit with aquifer-penetrating cut-off wall

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