基于朗肯理论砂土地层地连墙槽壁局部稳定性分析

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中图分类号：TU472 文献标识码：A DOI： 10.7535/hbgykj.2025yx05004

Local stability analysis of diaphragm wall trench face in sand soil layer based on Rankine theory

SONG Lianhel，AN Chenliang²³， JIA Bosong1， SHI Li4，WU Wei2³，WANG Daoyuan 2，3 （1.Huitong ConstructionGroup Company Limited，Baoding，Hebei O74099，China；2.Hebei Provincial Seasonal FrozenArea Highway Service Safetyand Early Warning Technology Innovation Center，Shijiazhuang，Hebei O5oo91，China；3.Department ofRoad and Bridge Enginering，Hebei Jiaotong Vocationaland Technical Colege，Shijiazhuang，HebeiO5o091，China; 4.Baoding City Drainage Service Center，Baoding，Hebei O71025，China）

Abstract：Inordertostudytheinfluencingfactorsandsensitivityoflocalstabilityofthediaphragm wallinsandysoillayers， thedisturbedarea of trenching construction was determined through the Rankine active earth pressre theory.The local instabilitymodelof trench wallwasconstructedasasemi-elipticalobliquesection.Thesolutionoflocalstabilitycoeficientof diaphragm trench wallwas derivedbyusing the limitequilibriumanalysis method.Thesensitivityof weak interlayer parameters，mud parameters，groundwater level depth，ground load，trench sectionlength and other factors tothestabilityof trench wallwasanalyzed.Theresultsshow thatthe increaseof the internalfrictionangleandcohesionof 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. Theanalyticalsolutionproposed inthisstudycan providea theoreticalbasis forthe stabilityevaluationof diaphragm wal crossing weak interlayers insand soil layers.Byoptimizing mudparametersandconstruction technology，the trench face stabilityofdiaphragmwallcanbeefectivelyimproved，whichhas important guidingvalue forthedesignandconstructionof diaphragm wall projects in water-rich sand soil layers.

Keywords：underground engineering；diaphragm wall；trenchingconstruction；trench facestability；local instability；theo retical derivation; analytical solution

随着城市基础设施建设的快速发展，深基坑工程越来越多。（剩余11170字）