南华大学学报（自然科学版）2025，Vol.39Issue(5)：67-73,7.DOI:10.19431/j.cnki.1673-0062.2025.05.008
悬挂式止水帷幕插入比对基坑渗流-沉降影响规律研究
Research on the Influence Law of Insertion Ratio of Suspended Waterstop Curtain on Seepage and Settlement of Foundation Pit
黄钦星 1谭收权 1康远鹏 1高明1
作者信息
- 1. 南华大学 资源环境与安全工程学院,湖南 衡阳 421001
- 折叠
摘要
Abstract
In foundation pit dewatering projects,the waterstop curtain serves as a crucial barrier mechanism,with its insertion depth significantly influencing the spatial distribution characteristics of the seepage field and the development patterns of settlement.However,existing research exhibits notable limitations.The majority of scholarly works employ sim-plified two-dimensional models for simulation,which fail to accurately capture the asym-metric distribution characteristics of the seepage field and the spatial heterogeneity of set-tlement deformation in three-dimensional space.This study establishes a three-dimensional fluid-solid coupling model utilizing the Abaqus finite element platform,incorporates the modified Cambridge model to characterize the elastoplastic behavior of soil,and integrates the Forchheimer equation to simulate the nonlinear seepage process,thereby developing a comprehensive numerical simulation system that accounts for non-Darcy seepage and soil compression characteristics.Through comparative analysis of five groups of curtain insertion depths(ranging from 0.6 to 1.0 meters),the nonlinear correlation between seepage field distribution characteristics and settlement response is elucidated,with the re-sults being compared against previous indoor similarity simulation outcomes.The findings demonstrate that when the curtain insertion depth is less than 1.2 times the excavation depth,the seepage field exhibits pronounced asymmetry,with the pore water pressure gra-dient peaking at 0.25 at the curtain base and the seepage flow rate reaching 1.2×10-3 m3/s.As the insertion depth increases to 1.6 times the excavation depth,the seepage flow rate decreases by 62.5%,and the hydraulic gradient reduces to 0.12.Surface settlement dis-plays a nonlinear decrease with increasing insertion depth.When the insertion depth in-creases from 1 to 1.2 times,the settlement amount decreases by 55%-60%,and the set-tlement trough morphology transitions from a"V"shape to a"U"shape.关键词
基坑降水/止水帷幕/渗流场/沉降分析Key words
foundation pit dewatering/waterstop curtain/seepage field/settlement analysis分类
建筑与水利引用本文复制引用
黄钦星,谭收权,康远鹏,高明..悬挂式止水帷幕插入比对基坑渗流-沉降影响规律研究[J].南华大学学报（自然科学版）,2025,39(5):67-73,7.
