【摘要】 考虑深基坑工程中坑内减压对基坑变形及稳定性等产生较大影响,本文选用适合基坑开挖的Hardening-Soil本构模型,结合某深基坑工程利用有限元法对承压层的不同处理方案进行对比计算.结果表明:在承压层未完全隔断的情况下,深基坑降承压水对基坑的稳定性及抗突涌都有利,但是增大了坑外地面沉降及地连墙底部位移.更多还原

【Abstract】 In the excavation of deep foundation pit,the decompression inside the pit will cause the deformation of the foundation pit and affect the stability of it.Taking some foundation engineering as an example,the different treatment schemes of pressure-bearing layer are compared through finite element computation using Hardening-Soil constitutive model which is suitable for the excavation of foundation pit.The result shows that,if the pressure-bearing layer is not completely cut off,pumping confined water is of benefit to the stability and bottom piping controlling of the foundation pit,but it also increases the settlement around the foundation and the horizontal displacement of the bottom of diaphragm wall.更多还原