SUO Wenbin, LIU Chun, SHI Bin, ZHANG Xiaoyu. 2017: ANALYSIS OF DISCRETE ELEMENT NUMERICAL SIMULATION FOR DEEP FOUNDATION PIT EXCAVATION WITH PCMW RETAINING STRUCTURE. JOURNAL OF ENGINEERING GEOLOGY, 25(4): 920-925. DOI: 10.13544/j.cnki.jeg.2017.04.004
    Citation: SUO Wenbin, LIU Chun, SHI Bin, ZHANG Xiaoyu. 2017: ANALYSIS OF DISCRETE ELEMENT NUMERICAL SIMULATION FOR DEEP FOUNDATION PIT EXCAVATION WITH PCMW RETAINING STRUCTURE. JOURNAL OF ENGINEERING GEOLOGY, 25(4): 920-925. DOI: 10.13544/j.cnki.jeg.2017.04.004

    ANALYSIS OF DISCRETE ELEMENT NUMERICAL SIMULATION FOR DEEP FOUNDATION PIT EXCAVATION WITH PCMW RETAINING STRUCTURE

    • The stability of deep foundation pit is an important engineering problem, in which effective supporting structure is the basis of foundation pit engineering. The discrete element method is employed in this paper, and a modeling and numerical simulation method of foundation pit and supporting structure is proposed. A close-packed discrete element model is used to build the model of initial layers, and the clump model of discrete element is used to build pipe piles with smooth surfaces. A deep foundation pit is taken as an example. The geometrical model can be built using the three-dimensional discrete element software MatDEM3D.The mechanical parameters of elements are determined according to the mechanical properties of soil. In numerical simulations, the soil layers are compacted using a pre-balancing operation, after which the deformation of soil and piles are simulated during the excavation process of foundation pit. The numerical simulation results are compared with the measured monitoring data to evaluate the effectiveness of foundation pit support structures. The discrete element numerical simulation method of foundation pit has potential application prospect in the stability prediction of foundation pit excavation process and the evaluation of the effectiveness of supporting structures.
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