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首页> 外文期刊>Journal of Infrastructure Systems >Simulation for Ground Movements due to Pipe Bursting
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Simulation for Ground Movements due to Pipe Bursting

机译：爆管引起的地面运动模拟

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Ground displacements are of primary concern when replacing pipelines in close proximity to existing buried utilities and structures. The objective of this research is to simulate the cavity expansion within the soil caused by the pipe-bursting process and to study the displacements of the soil in the vicinity of the burst pipe and at the ground surface with a finite difference plane strain model for an elastic-plastic medium. Soil parameters such as the bulk modulus, shear modulus, elastic modulus, Poisson's ratio, dilation angle, and friction angle are varied in the simulations to study the effects of these parameters on the soil displacements due to pipe bursting. The results indicated that the soil movement was concentrated in a wedge-shaped zone between the centerline of the old pipe and the soil surface. In dense sand, the outward and upward effects dominate the displacement pattern in shallow pipe bursting, with considerable dilation occurring in the soil above the burst pipe. Close to the old pipe within the ground, the magnitude of ground movement is higher and decreases toward the ground surface. A higher bulk modulus and higher elastic modulus both lead to higher ground displacements. The simulation results are compared with the actual displacements measured in a field test.
机译：在更换与现有地下公用设施和建筑物紧邻的管线时，地面位移是主要问题。这项研究的目的是模拟由爆管过程引起的土壤内部的空洞膨胀，并利用有限差分平面应变模型研究爆裂管附近和地面的土壤位移。弹塑性介质。在模拟中改变诸如土模量，剪切模量，弹性模量，泊松比，膨胀角和摩擦角之类的土壤参数，以研究这些参数对管爆裂引起的土壤位移的影响。结果表明，土壤运动集中在旧管道中心线与土壤表面之间的楔形区域中。在稠密的沙子中，向外和向上的作用主导了浅管爆破中的位移模式，在爆破管上方的土壤中发生了相当大的膨胀。靠近地面内的旧管道，地面运动的幅度较高，并且朝向地面逐渐减小。较高的体积模量和较高的弹性模量均导致较高的地面位移。将模拟结果与现场测试中测得的实际位移进行比较。

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