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针对目前城市地铁施工中造成既有管线的破坏问题,采用数值计算的方法,深入研究隧洞开挖施工导致的地层变化引起的输水管线不同方向的位移、轴向和切向载荷,以及弯矩和扭矩的变化.研究结果表明:隧道开挖施工引起的输水管线的竖向垂直位移和水平位移可以采用高斯曲线拟合,但管线轴向位移变化则具有双峰特征.对于输水管线的轴向载荷和剪切荷载存在较大差异,可以采用不同函数进行拟合.输水管线所受弯矩和扭矩则具有互补性,对管线的安全运行影响较大.
Aiming at the problem of the destruction of the existing pipeline in the metro construction of the city at present, the displacement, axial and tangential loads of the water pipeline caused by the strata caused by tunneling excavation are studied in detail by numerical calculation method, and the bending moment And torque variation.The results show that the vertical vertical displacement and horizontal displacement of the water conveyance pipeline caused by tunnel excavation can be fitted with Gaussian curve, but the axial displacement of the pipeline has the double-peak characteristics.For the water pipeline There is a big difference between the axial load and the shear load, which can be fitted by different functions.The bending moment and torque of the water pipeline are mutually complementary, which have a great influence on the safe operation of the pipeline.