双线盾构隧道下穿输水箱涵安全性影响的有限元分析

Influence of double-line shield tunnel on the safety of water tank culvert finite element analysis

结合城际铁路双线盾构隧道下穿输水箱涵工程实例,采用peck公式计算施工期引起的地表沉降,同时进行有限元模拟,综合分析双线盾构隧施工对输水箱涵运行的安全性影响。研究结果证明:双线盾构隧道下穿输水箱涵施工期引起的地表沉降与采用peck公式和有限元模型计算分析得到沉降量结果吻合度较高,通过理论计算和有限元模型计算的综合对比分析进一步复核,输水箱涵变形及及结构内力均满足运行安全要求。该工程的计算结论可为类似工程提供参考。

The peck formula was used to calculate the ground settlement caused by the construction period of a double-line shield tunnel under water tank culvert project,and the finite element simulation was carried out to comprehensively analyze the influence of double-line shield tunnel construction on the safety of water tank culvert operation.The results showed that the peck formula and finite element model were used to calculate and analyze the ground settlement caused by the double-line shield tunnel underpass water tank culvert during the construction period,and the settlement results were in good agreement with each other.Through the comprehensive comparison and analysis of theoretical calculation and finite element model,the deformation and structural internal force of the water tank culvert met the operation safety requirements.The calculation results of this project can provide reference for similar projects.