Analysis Of The Surrounding Underground Pipelines And Soil Deformation Affected By Foundation Excavation

Analysis of the surrounding underground pipelines and soil deformation affected by foundation excavation is an important topic in the foundation pit. In the densely populated city, Pit excavation will cause damage to internal forces of the surrounding soil, resulting in the displacement and deformation of the soil, as well as the underground pipelines, which make the internal forces of the pipes redistribute. Based on the former study, the main contents include:1.The current theory and calculation methods for the foundation pit and surrounding underground pipeline deformation caused by the excavation are introduced. Obtained the deformation curve of the Pipeline vertical displacement.2.Relevant finite element theory are summarized, building dimensional finite element model of Soil、buried pipeline and pit support structure by using the finite element software MIDAS, the sensitivity of parameters is approached, including the distance between pipelines and foundation, the different elastic modulus of pipelines and soil, the size of foundation excavation. Come to certain rules, providing a reference for making formulate corresponding measures to protect pipelines in the design and construction.3. The deformation of soil and underground pipelines were analyzed in the same place around foundation pit, they are compared by two size of different distance from foundation pit and elastic modulus of pipelines.4. Taking the foundation pit of rail traffic command center in Beijing as an example, making dimensional finite element calculation, a typical cross-section is select, draw the vertical displacement of underground pipelines, compared with the actual monitoring data.