摘要
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。
The excavation of the urban pedestrian underpass often induces the undesired deformation and even damage to the underground utilities nearby.The pipeline is idealized as the beam on the elastic soil foundation and the longitudinal bending formula of the underground pipelines is derived.The failure criterion for the flexible pipelines with rigid joint is also proposed.Assuming that the settlement trough of the pedestrian underpass has the shape of the Gaussian normal distribution,the surface and subsurface settlement prediction formula and their relationships among parameters are presented.Based on the underpass construction monitoring data,the safety analysis case history of a gas line affected by the underpass excavation is presented.
出处
《土工基础》
2017年第4期410-412,共3页
Soil Engineering and Foundation
关键词
城市人行地下通道
地下管线
沉降槽
安全分析
Urban Pedestrian Underpass
Underground Pipelines
Settlement Trough
Safety Analysis
