滑坡隧道新型综合加固结构理论研究

当滑坡体厚度较大,隧道在滑面附近时,为了解决治理费用较高,施工难度大,工期较长的问题,提出一种滑坡隧道新型综合加固结构。治理理念是用锚索、抗滑桩和隧道衬砌加固结构,只对隧道及其与隧道稳定直接相关的洞周滑坡岩土体进行加固,针对该综合加固结构体系的特点建立物理力学模型,并对其内力进行理论分析,推导出加固结构体系中各单元结构轴力、剪力和弯矩的理论计算式;算例分析结果表明,锚索的作用使隧道边墙不利受力状态有所改善,据此可以通过调节锚索或隧道衬砌结构参数,使隧道加固衬砌、抗滑桩和锚固体各单元结构的受力达到均衡的合理状态。

Theoretical Study on New Type Comprehensive Reinforcement Structure of Landslide Tunnel

In order to solve the problems of high cost,challenging difficulties and long period to treat the tunnel with thick sliding body near the sliding face,a new type comprehensive reinforcement structure is put forward. The key concept is to reinforce only the tunnel and the sliding bodies related directly to the stability of the tunnel with anchor cable,anti-slide pile and tunnel lining reinforcement structures.According to the characteristics of the integrated reinforcement system,a physical mechanics model is established,the internal forces are analyzed,and the axial force,shear force and bending moment theoretical calculation formulas of each unit structure of the reinforcement strengthening structure are deducted. The calculation analysis results show that as a result of the action of anchor cable,the adverse stress of tunnel wall is improved,and the stresses of each unit structure of tunnel lining,anti-slide pile and anchor structure are balanced rationally by adjusting the parameters of the anchor cable or tunnel lining structure.