基于一个上限分析方法的深基坑抗隆起稳定分析  

Analysis of stability against upheaval of deep excavation by an upper limit method

作　　者：邹广电[1] 

机构地区：[1]南京水利科学研究院土工研究所,江苏南京210024

出　　处：《岩土力学》2004年第12期1873-1878,共6页Rock and Soil Mechanics

摘　　要：提出了一个以塑性力学的上限分析理论为基础的深基坑基底抗隆起稳定分析方法;该法从地基极限承载力的普朗德尔-瑞斯纳解答的滑裂面出发,建立基本破坏模式。引入莫尔-库伦屈服准则得到其流动法则后,求得塑性区的协调速度场,从而通过虚功率原理求得深基坑基底的极限承载力,最终求得深基坑的基底抗隆起稳定安全系数;将该方法应用于上海浦东张杨路商业购物中心第一商厦的深基坑分析,揭示了该商厦施工期间基坑基底发生严重隆起破坏的内在原因。An analytical method of stability against upheaval of deep excavation by the upper limit theory of plastic mechanics is presented. The basic wreck model is founded according to Prandtl-Reissner solution of ultimate bearing capacity of foundation. In order to obtain the harmonious velocity field, the Mohr-Coulomb yield criterion is introduced, in which the flow rule is obtained. The ultimate bearing capacity of bottom of deep excavation and the safety factor of against upheaval are solved through the principle of virtual work finally. In the stability analysis against upheaval of deep excavation for the First Edifice of the Commercial Shopping Center being located in Zhang—Yang Road of Shanghai, the internal reason of upheaval wreck of the deep excavation that occurred in the edifice is successfully opened out by the method.

关 键 词：深基坑 基底抗隆起稳定分析 上限分析 滑裂面 流动法则 协调速度场 

分 类 号：TU441[建筑科学—岩土工程]