Influence of urban land subsidence on deformation of water and sewer pipelines—A case study of the Xiangluowan area, Tanggu District, Tianjin Municipality

Under the influence of land subsidence, water and sewer pipelines lying at various depths sink markedly differentially. Based on SIGMA/W modularization in the GEO-SLOPE software, land subsidence of water and sewer pipelines in the is simulated and the subsidence mechanism of water and sewer pipelines is analyzed. Additionally, based on the deformation features of water and sewer pipelines, the key points of planning of water and sewer pipelines in the Xiangluowan area are presented. In that case, analytical hierarchy progress is used to determine their weight of element factors of geology engineering. The distribution of water and sewer pipelines is evaluated comprehensively to provide rational engineering geological grounds for the plan of water and sewer pipelines, reduce the environmental engineering geological problems induced by land subsistence and guide the general planning of the Xiangluowan area.