新建桥梁对现有渠道边坡的稳定影响分析

Analysis on Impact of New Bridges on Stability of Existing Channel Slopes

摘要:

跨渠桥梁下部结构施工过程中将会对附近土体产生扰动，从而引起土体结构内力变化和变形，对渠道自身及运行的安全性产生影响。依托新疆坎乡至伊泰煤矿矿区跨渠桥梁工程，采用有限元仿真分析，对桥梁桩基施工过程及地震工况下桥梁运行期对周围土体内部应力分布及位移规律进行分析，并在此基础上与渠道衬砌混凝土抗拉强度允许值及边坡稳定进行对比，为桥梁施工期渠道安全评价提供技术支持。研究结果可为今后类似工程提供对比参考。

Abstract:

During the construction of the substructure of the cross-channel bridge, the disturbances will be caused to the nearby soil, thereby causing the changes in the internal forces and deformation of the soil structure, which affects the safety of the channel itself and its operation. Relying on the cross-channel bridge project from Kanxiang to Yitai Coal Mine in Xinjiang, the finite element simulation analysis is adopted to analyze the internal stress distribution and displacement laws of the surrounding soil during the construction process of bridge pile foundations and the operation period of the bridge under seismic conditions. On this basis, a comparison is made with the allowable tensile strength of the channel lining concrete and the stability of the slope to provide the technical support for the safety assessment of the channel during the bridge construction period. The research result can provide a comparative reference for similar projects in the future.