考虑土拱效应与位移的黏土非极限主动土压力研究
RESEARCHING OF NON-LIMITING ACTIVE EARTH PRESSURE ON CLAY BEHIND A WALL CONSIDERING ARCHING EFFECT AND DISPLACEMENT
摘要
Abstract
To investigate the influence of the soil arching effect on the non-limiting active earth pressure of clay behind a retaining wall under displacement conditions,this study examined the distribution of earth pressure and the development characteristics of tensile cracks under variations in cohesion,internal friction angle,horizontal shear stress,and wall displacement.Using the horizontal slice method and static equilibrium principle,a theoretical formula for non-limiting active earth pressure was derived,incorporating wall displacement,soil arching effect,inter-layer horizontal shear stress,and tensile crack depth at the wall top.The proposed method was validated through comparison with laboratory tests and existing theoretical solutions,demonstrating good agreement with both experimental measurements and prior models,thereby confirming its effectiveness in calculating non-limiting active earth pressure in clay considering soil arching.The results indicate that as displacement increases,the potential rupture angle(β)increases and the potential failure surface evolves into the actual critical failure surface.The depth of tensile cracks under the intermediate active state is influenced by the soil arching effect and wall-soil interface cohesion.Non-limiting active earth pressure decreases with increasing cohesion(c)and internal friction angle(φ).Cohesion and the wall-soil interface friction angle(δ)are key factors affecting the position of the soil arch.Due to clay cohesion,arching,and wall displacement,a tensile crack zone forms near the wall base.With increasing displacement,the average lateral earth pressure coefficient(Kawn)continuously decreases,while the average shear stress coefficient(K)increases and eventually stabilizes.关键词
土拱效应/非极限主动土压力/拉裂缝深度/层间剪切应力/位移Key words
Soil arching effect/Non-limiting active earth pressure/Depth of tensile crack/Average shear stress/Displacement分类
建筑与水利引用本文复制引用
邓燕华,蒋峻峰,王谊,吴浩秋,史路军,赵苏玲..考虑土拱效应与位移的黏土非极限主动土压力研究[J].工程地质学报,2026,34(2):805-816,12.基金项目
2023年度广东省普通高校重点领域专项(资助号:2023ZDZX4093),2024年度广东省普通高校特色创新类项目(资助号:2024KTSCX333),2021年度江西省教育厅科技类重点项目"钢筋混凝土叠合梁板交角处装配式模板系统开发与应用"(资助号:GJJ215301),2023年度校级质量工程"智能建造教学创新团队"(资助号:2023JXTD03).This research is supported by the 2023 Annual Guangdong Provincial Ordinary University Key Areas Special Project(Grant No.2023ZDZX4093),2024 Annual Guangdong Provincial Ordinary University Characteristic Innovation Project(Grant No.2024KTSCX333),2021 Annual Jiangxi Provin-cial Department of Education Key Science and Technology Project"Development and Application of Prefabricated Formwork System for Reinforced Concrete Composite Beam-Slab Corners"(Grant No.GJJ215301)and 2023 Annual University-Level Quality Engineering Project"Intelligent Con-struction Teaching Innovation Team"(Grant No.2023JXTD03). （资助号:2023ZDZX4093）
