期刊论文

TESTS AND CALCULATION OF ACTIVE EARTH PRESSURE FOR UNSATURATED SOIL UNDER NON-LIMIT STATE

中文

工程地质学报

1004-9665

2023

31

02

650-660

10.13544/j.cnki.jeg.2022-0209

国家自然科学基金项目(资助号：51678230)~~；

本校为其他机构

目前土压力研究大都以极限状态下的土体为研究对象，且假定土体处于饱和或干燥状态，未考虑墙体位移与土体非饱和特性对土压力的影响，在实际工程的应用中有局限性。鉴于此，开展主动平动模式下墙后不同含水量砂土的刚性挡墙土压力室内模型试验，并采用渗压计和土压力盒分别量测不同深度处土中的基质吸力和土压力，以及利用DIC图像关联技术观察不同挡墙位移时的土体位移情况。试验结果表明，当墙后土体处于非极限状态时，土体破坏面始终通过墙踵，且其形态接近于平面；其次，在此基础上，结合非极限状态下墙土摩擦强度发挥特性和非饱和土强度准则，提出位移相关的非饱和土强度模型，并建立非极限...

At present,most studies on earth pressure take the soil in the limit state as the research object,assume that the soil is in the saturated or dry state,and do not consider the influence of wall displacement and soil unsaturated characteristics on the earth pressure,whic...MORE At present,most studies on earth pressure take the soil in the limit state as the research object,assume that the soil is in the saturated or dry state,and do not consider the influence of wall displacement and soil unsaturated characteristics on the earth pressure,which has limitations in practical engineering applicati...