地铁深基坑周边土体沉降预测对比

Comparative Study on Settlement Prediction of Soil Around Deep Foundation Pit Based on Partial and Normal Distribution Function

针对地铁深基坑周边地表沉降变形预测,运用偏态、正态分布函数对其沉降特征进行估算,并采用多条线路多个地铁深基坑开挖为例,结合实测数据对比分析.结果表明:偏态分布函数地表沉降估算结果更接近于现场实测值,且其偏态修正参数ξ的取值范围在1.4~3.0内变化,土体抗剪强度对数与偏态修正系数成反比关系.

Aiming at the prediction of ground settlement deformation around deep foundation pit of subway, the settlement characteristic is estimated by using partial and normal distribution function, and the excavation of several deep foundation pits with multiple lines is taken as an example, and compared with the measured data. Results show that the estimating results of the surface subsidence of the partial distribution function are closer to the field observations and the values of the partial correction parameters ξ range from 1.4 to 3.0. The logarithm of shear strength and the partial correction coefficient have inverse relations.