扬压力超过设计值时的重力坝抗滑稳定复核  

Review of stability against sliding on gravity dam under uplift pressure over the design value

作　　者：程琳[1] 邹永超 

机构地区：[1]河海大学,南京210098 [2]中国水务投资有限公司,北京100053

出　　处：《西北水电》2011年第B09期49-52,共4页Northwest Hydropower

基　　金：国家自然科学基金(50539030-1-3);中国水电工程顾问集团公司科技项目(CHC-KJ-2007-02)

摘　　要：鉴于棉花滩大坝5号坝段的实测扬压力系数超过了设计值,对典型断面进行了抗滑稳定复核。计算过程中采用最大可能值法来确定设计工况下的扬压力值。采用规范规定方法进行复核,并以非线性有限元强度折减系数法的结果作为参考。复核结果表明该坝段满足抗滑稳定要求,但与类似工程相比强度储备系数偏小。In view of the uplift pressure on the 5th dam section of Mianhuatan project exceeding the design value, a review of the stability against sliding on the typical section of it is made. The method of maximum possible value is used to determine the uplift pressure under the design condition. The review methods specified in relative standards are used and the results by the non-linear finite element strength reduction method are referred to. The review results show that the dam section meets the requirement of stability against sliding, but the factor of strength margin is too small compared to similar projects.

关 键 词：扬压力 抗滑稳定性 最大可能值法 强度折减系数法 

分 类 号：TV642.3[水利工程—水利水电工程] TV698.1