浅埋暗挖隧道施工影响下桩基沉降量与承载力损失的关系

Relationship between the settlement and the bearing capacity loss of pile with shallow tunnel construction

基于Bobet等提出的无水地层浅埋圆形隧道施工地层内应力状态解析解,通过非耦合方法建立了浅埋隧道施工影响下桩基沉降量与承载力损失之间的关系.分别以荷载传递法与弹性力学法求出桩体弹性压缩量与桩端土体压缩量,从而得到隧道施工影响下桩基承载力损失与桩基沉降量之间的关系,证明了在实际工程中通过减少桩基沉降来实现桩基承载力损失控制的正确性,为今后类似工程实现风险定量控制提供了理论依据.

Based on Bobet＇s analytical solution for shallow round tunnels in dry stratum, the relationship between the settlement and the bearing capacity loss of pile with shallow tunnel construction was created with non-coupling method. Pile elastic compression and soil elastic compression of pile-end were obtained by load transfer method and elastic mechanics method individually, then the relationship between the settlement and the bearing capacity loss of pile with shallow tunnel construction was es- tablished. Reducing the settlement of pile foundation proved to be correct for controlling the loss of pile bearing capacity in tunneling, which provide theoretical basis for subsequent similar projects construc- tion.