【摘要】 为研究在承压水条件下，悬挂式止水帷幕基坑涌水量影响因素引起的涌水量变化规律，文章采用有限元数值分析方法，以长江漫滩富水地层地区某在建悬挂式止水帷幕基坑工程为例，通过改变单一或2个变量，对含有承压水条件下，引起悬挂式止水帷幕基坑涌水量的因素，包括渗透系数、止水帷幕插入深度、影响半径、承压水头高度等进行分析，给出了在单一或2个影响因素条件下，基坑总涌水量和基坑半宽单位流量随帷幕距离的变化规律。结果表明：土体渗透系数与影响半径的取值对悬挂式止水帷幕基坑涌水量的耦合影响较大，涌水量随着渗透系数和影响半径取值的增大，近似呈正比例增长，并得出了变化方程；承压水头高度小幅度增大下，总涌水量变化不大且呈正比例增长；止水帷幕插入含水层较浅时，基坑半宽单位流量随距离的变化曲线变化幅度较大，随着止水帷幕插入深度增加，曲线相较之前较为平稳；在止水帷幕插入较浅时，涌水量减小速率增长幅度逐渐减小；止水帷幕长度超过37.4 m后，涌水量减小速率增长幅度逐渐快速增大。更多还原

【Abstract】 To investigate the variation patterns of inflow volume caused by influencing factors in suspended water-stopping curtain foundation pits under confined water conditions，this study employs finite element numerical analysis.Taking a suspended water-stopping curtain foundation pit project under construction in the water-rich strata of the Yangtze River floodplain as a case study，by altering one or two variables，this study analyzes factors influencing inflow volume in suspended water-stopping curtain foundation pits under confined water conditions，including permeability coefficient，curtain insertion depth，influence radius and confined water head height.It presents the variation patterns of total inflow volume and unit flow rate per half-width of the foundation pit with respect to curtain distance under single or dual influencing factors.Results indicate that the combined effect of soil permeability coefficient and influence radius significantly impacts water inflow volume.Inflow increases approximately proportionally with higher permeability and influence radius values，with derived variation equations.Under minor increases in confined water head height，total inflow volume shows minimal change and exhibits proportional growth.When the water-stopping curtain is inserted shallowly into the aquifer，the unit flow rate per half-width of the excavation exhibits significant variation with distance.As the insertion depth increases，the curve becomes relatively smoother.At shallow insertion depths，the rate of decrease in inflow gradually slows.However，once the curtain length exceeds 37.4 m，the rate of decrease in inflow accelerates rapidly.更多还原