|Analysis of the influence of deep foundation pit excavation on adjacent pipeline in Hefei area
|中文关键词: 深基坑 浅埋管线 地下连续墙 数值模拟 地表沉降
|英文关键词: deep excavation shallow buried pipeline diaphragm wall numerical simulation ground surface settlement
| In order to study the influence of deep excavation on adjacent pipelines in Hefei area, the deep foundation pit of a metro station in Hefei city is selected for the research carried. The finite difference software FLAC3D is adopted to simulate the actual engineering. According to the calculation results, the deformation law and the stress distribution of the pipeline are discussed, and the impact of the excavation process, pipeline material, pipeline diameter and position on the force deformation of pipeline has been analyzed. Research results show that there is a trend of pipeline deformation to the foundation pit during the excavation. The deformation of the pipeline in the end area of the foundation pit is the smallest, while the deformation of the pipeline in the middle part of the foundation pit is the largest. Under the same excavation conditions, pipeline material, diameter and location of pipeline deformation have a profound influence on the deformation of the pipeline. With the increase in the stiffness of the pipeline material, the overall deformation of the pipeline is smaller and the stress is greater. The deformation and stress value of pipeline decrease with the increase of pipeline diameter. With the increase of the distance between the pipeline and the foundation pit, the deformation and stress of the pipeline are reduced. The pipeline buried depth increases, the deformation and stress of the pipeline also increase.