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Analysis of deformation behaviors of composite soil nailing for excavations in soft soil layers

DU Fei, CHEN Zhilong (PLA University of Science & Technology, Nanjing 210007, China)  
Newly developed composite soil nailing shows its great potentialities for shallow excavations (excavation depth H ≤7m) in soft soil ground. However, the associated calculation theories do not meet the needs of engineering application. Based on plane strain nonlinear finite element method (FEM), the deformation behaviors of the composite soil nailing are investigated, and some initial conclusions on its mechanism are obtained. On the other hand, either the FEM results or engineering surveys imply that deep rotational stability of foundation pit is the critical factor of success or failure, it should be checked during both design and construction process. Other conclusions valuable to application are also achieved.
【CateGory Index】: TU472
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