止水帷幕插入比对基坑地下水控制的影响规律  

Influence law of waterproof curtain insertion ratio on groundwater control in foundation pits

作　　者：范新明 邓毅旁 李辉[2] 邱继生[3] 刘慧[3] FAN Xinming;DENG Yipang;LI Hui;QIU Jisheng;LIU Hui(Construction Branch,Xi’an Rail Transit Group Co.,Ltd.,Xi’an 710018,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi’an 710043,China;College of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]西安市轨道交通集团有限公司建设分公司,陕西西安710018 [2]中铁第一勘察设计院集团有限公司,陕西西安710043 [3]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《西安科技大学学报》2025年第1期170-181,共12页Journal of Xi’an University of Science and Technology

基　　金：国家重点研发计划项目(2018YFC0808705-4);陕西省重点研发计划项目(2024SF-YBXM-626)。

摘　　要：设置止水帷幕是解决基坑地下水控制的一种有效方式,为研究止水帷幕插入比(嵌入基坑底部深度/基坑开挖深度)对地下水控制的影响规律,通过设计室内模型箱进行试验,研究了初始水位和止水帷幕插入比变化对基坑地下水控制的影响规律,利用验证过的有限元模型进一步分析了止水帷幕插入比对基坑地下水控制的影响规律,并给出了止水帷幕有效插入比的确定方法。结果表明:止水帷幕插入比对地下水控制影响显著,与不设置止水帷幕相比,4种初始水位下基坑边缘处止水帷幕水位均有明显下降,引入止水帷幕插入比与坑内外水位差,求解出4种初始水位下的有效插入比,并根据模型试验及有限元分析结果提出了止水帷幕的设计方法。研究结果对进一步探究止水帷幕对深基坑地下水控制的影响规律并确定止水帷幕的插入比具有重要的指导意义。To design a waterproof curtain is an effective way to control groundwater in foundation pits.In order to study the influence of the insertion ratio of the waterproof curtain(embedded depth at the bottom of the foundation pit/excavation depth of the foundation pit)on groundwater control,the indoor model box experiments were conducted to investigate the influence of changes in initial water level and the insertion ratio of the waterproof curtain on groundwater control in foundation pits.And the validated finite element model was used to further analyze the impact of the water stop curtain insertion ratio on groundwater control in the foundation pit,and a method for determining the effective insertion ratio of the water stop curtain was proposed.The results showed that the insertion ratio of the waterproof curtain had a significant impact on groundwater control.Compared with the results without setting the waterproof curtain,the waterproof curtain at the edge of the foundation pit decreases obviously under the four initial water levels.By introducing the insertion ratio of the waterproof curtain and the water level difference between the inside and outside of the pit,the effective insertion ratios at four initial water levels were determined.Based on the results of model experiments and finite element analysis,a design method for the waterproof curtain was proposed.The research could provide an important guiding significance for further exploring the impact of waterproof curtains on groundwater control in deep foundation pits and determining the insertion ratio of waterproof curtains.

关 键 词：地下水控制 止水帷幕 有效插入比 模型箱 数值模拟 

分 类 号：TU463[建筑科学—结构工程]