The Numerical Simulation Analysis On Excavation?Support And Jacking Of Pipe-Jacking Working Well

Pipe jacking work shafts are places for jacking equipments. They are not only the origins of the Top tubes boring machines or Tools, but also structures that withstand Reaction of the Top of the main cylinder. The security and stability of the Pipe jacking work shafts are related to the success or failure of the enter Pipe jacking construction.Therefore, the pipe jacking work well support and design is particularly important. Base on the South-North Water Diversion Project, and select the first unit in the " Tang Wanggan pipe water pipeline through the LiYe line project " as the background,Through the pipe jacking work well, to simulate the excavation supporting and heading in analysis of pipe jacking construction of supporting structure, and the influence of jacking construction on the surrounding soil.Specific content is as follows:1.According to the specification requirements, to design the supporting of pipe jacking work well, the finite element model is established to simulate the excavation of pipe jacking work well, studies the characteristics of force and degeneration, verify the feasibility of the protection scheme.2. According to the calculation results, the horizontal displacement and vertical displacement of the working well gradually increased with the depth of excavation, and the maximum horizontal displacement is located in the clay layer.3.Using software to simulation work well under the stress of the transverse phase of jacking force and deformation properties, compared with the excavation and support phase,the analysis of the effect of jacking force applied to the work well.4.By applying phase numerical simulation analysis of horizontal jacking force of vertical displacement, summarizes the law of the land subsidence.