【摘要】 不同地区土层参数各不相同,基坑变形对各参数变化的敏感性也不相同。以深圳某深基坑工程为研究对象,借助加权残值法和弹塑性有限元分析软件,计算该基坑在各工况下的变形,结果与实测值基本吻合。同时重点研究了土层参数变化对基坑开挖过程中水平位移和地表沉降的影响规律:土体的弹性模量、粘聚力、内摩擦角对基坑的水平位移和沉降影响较明显,尤以内摩擦角最为敏感,且地表沉降量随着土层内摩擦角的减小呈线性增加趋势。更多还原

【Abstract】 Soil parameters differ from areas.Sensitivity of pits deformation varies with the change of soil parameters.A deep pit in Shenzhen is an example to be analyzed by means of elastoplastic finite element method and weight residual method.Deformations are calculated in every load steps,which are consistent with the measurements.Meanwhile more attentions are paid to study the discipline of influence of pits horizontal displacement and soil vertical settlement caused by soil parameters changing during construction process.The results indicate that the horizontal displacement and vertical settlement of pits are affected obviously by soil elastic modulus,cohesion and angle of internal friction,and most by the third.Soil vertical settlement is increasing with decreasing of soil angle of internal friction.更多还原