扁铲侧胀试验求解初始水平应力和静止侧压力系数  

Solution to initial horizontal stress and lateral earth pressure coefficient at rest by flat dilatometer tests

作　　者：唐世栋[1] 吕建春[1] 傅纵[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《岩土工程学报》2006年第12期2144-2148,共5页Chinese Journal of Geotechnical Engineering

摘　　要：根据扁铲侧胀试验全过程中土体应力应变特点,以弹性理论中的Mindlin解为基础导出试验结果与土体剪切模量和泊松比之间的关系,进而得到原位土体初始水平应力σh0的理论计算式及静止侧压力系数K0的表达式。用上海地区地铁工程的实际资料进行对比分析,结果令人满意。According to the stress-strain characteristics of soil in flat dilatometer tests, the relationship between the test results and two indexes （shear modulus and the Poisson＇s ratio） of the soil was derived based on the Mindlin＇s solution in the elastic theory. Then, the theoretical formula of the in-situ initial horizontal stress σh0 and the lateral earth pressure coefficient at rest K0 were derived. Compared with the practical data of subway projects in Shanghai, the analytic results were satisfactory.

关 键 词：扁铲侧胀试验 原位水平应力 静止侧压力系数 MINDLIN解 

分 类 号：TU413[建筑科学—岩土工程]