深开挖及高填筑陡坡下地基承载力验算方法  

A CALCULATION METHOD FOR BEARING CAPACITY OF FOUNDATION UNDER DEEPLY EXCAVATED OR HIGH FILLED SLOPES

作　　者：宋二祥[1] 李贤杰 付浩 SONG Erxiang;LI Xianjie;FU Hao(Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education,Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学土木工程系土木工程安全与耐久教育部重点实验室,北京100084

出　　处：《工业建筑》2020年第10期87-93,共7页Industrial Construction

基　　金：国家973计划课题资助项目(2014CB047003)。

摘　　要：针对深基坑坑底隆起及高陡边坡下地基承载力的验算问题,在分析现行有关技术标准所建议方法不足的基础上,参照Terzaghi最早提出的思路进一步研究,提出改进的验算方法。改进方法考虑了坡体内竖直破裂面上的剪应力作用,明确了对此类问题应按单侧滑移破坏计算其地基承载力,并建议采用安全系数的第二种定义,给出了完整的计算式。通过与极限分析有限元计算结果的对比,对所建议改进方法的合理正确性及计算精度进行了检验。With regard to foundation bearing capacity evaluation related to the basal stability of deep excavation and high filled steep slopes,the weak points of the methods in current engineering practice were discussed,and then an improved calculation method was proposed with reference to the idea first presented by Terzaghi.The improved method took account of the shear stress on the vertical fracture surface in the slope,and made it clear that the foundation bearing capacity should be calculated according to the unilateral slip failure mode,and adopted the more suitable second definition of the safety factor.A complete set of formulas was given,and its rationality and accuracy were validated through comparative calculations with the much refined method of finite element limit analysis.

关 键 词：坑底隆起 高陡边坡 地基承载力 单侧滑移破坏 

分 类 号：TU470[建筑科学—结构工程]