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城市人行地下通道开挖会引起邻近地下管线的变形,甚至破坏。将管道视为弹性地基上的梁,提出了地下管道纵向弯曲应力计算公式,以及考虑工作应力的刚性接头柔性管道的破坏判别标准。假设地道上覆土体的沉降槽服从高斯正态分布函数,提出了地表及地下沉降计算公式及其参数之间的关系。最后结合某人行地道施工监测数据,具体给出了一个燃气管道受隧道开挖影响的安全分析算例。该计算方法对城市地道施工时地下管线的安全评价有重要的参考价值。
Urban pedestrian passage excavation will cause the adjacent underground pipeline deformation, or even damage. Considering the pipe as a beam on the elastic foundation, the formulas for calculating the longitudinal bending stress of the underground pipe and the criteria for the damage of the rigid pipe flexible pipe considering the working stress are proposed. Assuming that the settlement trough of the overlying soil obeys the Gaussian normal distribution function, the relationship between the formula of surface and subsurface settlement and its parameters is proposed. Finally, combined with somebody monitoring the construction data of tunnels, a safety analysis example of gas pipeline affected by tunnel excavation is given specifically. This calculation method has important reference value for the safety evaluation of underground pipelines in urban tunnel construction.