应变局部化理论在基坑设计中的应用  

Application of strain localization theory in foundation pit design

作　　者：叶朝汉[1] 袁聚云[1] 徐枫[2] 董建国[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]上海岩土工程勘察设计研究院有限公司,上海200002

出　　处：《岩土工程学报》2006年第B11期1425-1427,共3页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(10372018)

摘　　要：在基坑监测过程中,一般采用规范里面的报警值作为尺度来衡量基坑的安全性,而缺乏理论依据。本文根据平面应变不排水试验结果,考虑土体应变局部化的影响,将剪切带开始形成时的强度指标应用到基坑设计中。计算结果表明:采用考虑局部化的强度指标能够更好地考虑基坑的安全性要求。In the foundation pit monitoring, the security of foundation pit with the alarm value in criterion is commonly judged. However, it is lack of theory foundation. Based on the influence of localization according to results of plane strain tests, the strength index was employed in the design of foundation pits. The results show that the strength index for calculating the localization of soils can satisfy the security of foundation pits.

关 键 词：基坑 平面应变 应变局部化 强度指标 

分 类 号：TU447[建筑科学—岩土工程]