论文部分内容阅读
根据Loganathan和Poulos提出的估算盾构施工产生的土层位移的简易方法,假定已知土层损失,可预测隧道周边土层的水平位移。邻近盾构的桩基础也要随土层位移产生内力、位移变化,而成为被动桩。参照弹性地基梁法,建立由土体水平位移导致的桩-土共同作用方程,通过杆系有限单元法实现求解盾构施工产生的桩身内力和位移,计算中可考虑不同的桩顶约束条件和土层分布条件。根据桩身内力、位移控制要求,可确定盾构隧道施工时的土层损失控制要求。
According to a simple method proposed by Loganathan and Poulos to estimate the displacement of the soil due to shield construction, the horizontal displacement of the soil around the tunnel can be predicted given the loss of soil. Adjacent to the shield of the pile foundation also with the displacement of the soil to produce internal forces, displacement changes, and become a passive pile. With reference to the elastic foundation beam method, the pile-soil interaction equation caused by the soil horizontal displacement is established. The internal force and displacement of the pile body generated by the shield construction are solved by the finite element method of the rod system. Different pile top restraints And soil distribution conditions. According to the requirements of pile internal force and displacement control, the control requirements of soil loss during the construction of shield tunnel can be determined.