河北工业科技2025，Vol.42Issue(5)：428-435,8.DOI:10.7535/hbgykj.2025yx05004
基于朗肯理论砂土地层地连墙槽壁局部稳定性分析
Local stability analysis of diaphragm wall trench face in sand soil layer based on Rankine theory
摘要
Abstract
In order to study the influencing factors and sensitivity of local stability of the diaphragm wall in sandy soil layers,the disturbed area of trenching construction was determined through the Rankine active earth pressure theory.The local instability model of trench wall was constructed as a semi-elliptical oblique section.The solution of local stability coefficient of diaphragm trench wall was derived by using the limit equilibrium analysis method.The sensitivity of weak interlayer parameters,mud parameters,groundwater level depth,ground load,trench section length and other factors to the stability of trench wall was analyzed.The results show that the increase of the internal friction angle and cohesion of the weak interlayer increases the stability coefficient of the trench wall by 288%and 83%,respectively,the increase of the mud weight and liquid level depth increases the stability of the trench wall by 69%and-24%,respectively,and the increase of the groundwater level,ground load and trench section length increases the stability of the trench wall by 53%,-6%and-13%,respectively.The analytical solution proposed in this study can provide a theoretical basis for the stability evaluation of diaphragm wall crossing weak interlayers in sand soil layers.By optimizing mud parameters and construction technology,the trench face stability of diaphragm wall can be effectively improved,which has important guiding value for the design and construction of diaphragm wall projects in water-rich sand soil layers.关键词
地下工程/地下连续墙/成槽施工/槽壁稳定/局部失稳/理论推导/解析解Key words
underground engineering/diaphragm wall/trenching construction/trench face stability/local instability/theo-retical derivation/analytical solution分类
建筑与水利引用本文复制引用
宋连河,安辰亮,贾博松,史立,武薇,王道远..基于朗肯理论砂土地层地连墙槽壁局部稳定性分析[J].河北工业科技,2025,42(5):428-435,8.基金项目
河北省自然科学基金(E2021419001) （E2021419001）
河北省高等学校科学技术研究项目(ZD2022086) （ZD2022086）
