太沙基地基极限承载力的三剪应力统一强度理论解  

Three-shear stress unified strength theoretical solution of Terzaghi ultimate bearing capacity of foundation

作　　者：高江平[1] 胡海波 孙世界 王泽普 GAO Jiangping;HU Haibo;SUN Shijie;WANG Zepu(Key Laboratory for Special Area Highway Engineering Ministery of Education, Chang'an University, Xi′an 710064, China)

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《西安建筑科技大学学报（自然科学版）》2019年第2期186-191,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(50578015)

摘　　要：以往对地基极限承载力的研究通常基于Mohr-Coulomb强度准则,但此理论未考虑中间主应力的作用,所计算的地基承载力值偏保守.本文考虑三个主剪应力的效应,得出了基于三剪应力统一强度理论的太沙基地基极限承载力解,通过算例对比分析了基于Mohr-Coulomb理论、双剪强度理论、双剪统一强度理论及三剪应力统一强度理论的地基极限承载力值,并利用MATLAB软件生成了参数b、c与承载力q_u之间的关系图.本文的理论解包含了基于前三种理论的地基承载力解,可以将材料的潜力发挥的更大.The previous research on ultimate bearing capacity of foundation is generally based on the Mohr-Coulomb strength criterion. However, this theoretical formula fails to takes into account the influence of intermediate main stress,and the calculated bearing capacity of foundation is conservative. Considering the effect of three main stresses, the paper deduces Ultimate Bearing Capacity Solution of Terzaghi Based on Unified Strength Theory of Three Shear Stresses. The ultimate bearing capacity of foundation is based on Mohr-Coulomb theory, twin-shear strength theory, twin-shear unified strength theory and three-shear stress unified strength theory are compared and analyzed by examples. The relationship between parameters b , c and bearing capacity Q u is plotted by using MATLAB software. The theoretical solutions in this paper include the solutions of foundation bearing capacity based on the first three theories, which can bring the potential of materials into full play.

关 键 词：三剪应力统一强度理论 Mohr-Coulomb理论 地基极限承载力 材料潜力 

分 类 号：TU456[建筑科学—岩土工程]