ANALYSIS STUDY OF THE PIT SUPPORT OF A PIPE JACKING PROJECT BASED ON MIDAS GTS NX
The deep pit support in the pipe jacking support project of the third ring road(Haxi Street-Xuefu Road)section of the drainage system improvement project(rain and sewage diversion transformation)is complex.Current numerical simulation research on foundation pit support for top pipe engineering often ignores the situation where there is no support at the top pipe and lacks reference in three-dimensional numerical simulation.On the premise of meeting the requirements for foundation pit support,it is necessary to consider that steel sheet piles cannot be driven to the bottom of the top pipe.Finite element software MIDAS GTS NX is used to simulate and study the unsupported situation in the deep foundation pit support of the pipe jacking project at various stages of construction.After analyz-ing the displacement and deformation of the foundation pit in each construction stage,it is found that the simulated results are well correlated with the actual monitoring values,providing the reference for similar projects.
pipe jacking projectdeep foundation pitthree-dimensional numerical simulationfoundation pit support
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