Study On Centrifuge Model Test Of Support Combined Anti-Slide Pile With Soil Nailing In Loess Slope

In this thesis, temporarily excavated loess slope and support combined anti-slide pile with soil nailing of it were studied,the slope is located in open cut tunnel segment of the portal of Guanyintang tunnel in Zhengzhou-xi'an railway line for passenger transport.Using centrifuge machine of 100gt, the different modes of deformation and failure of the slope were simulated without support,with soil nailing support and with support combined anti-slide pile with soil nailing, deformation of different supporting styles under strength and supporting effect were under quantitative analysis.Based on the domestic and foreign literature and data,the status and development of investigation about anti-slide pile support,soil nailing support of slope and the way of centrifuge model test to study slope were summarized.The fundamental theory of centrifuge model test was expatiated emphasesly. Based on general condition of construction spot, relevant project of the test was framed. The feasibility and rationality of various model materials were demonstrated.There are three groups of test, in each group, slope has been excavated by three steps. At the final of the test, sedimentation of the slope, horizontal displacement on the face of the slope, displacement of the internal part of the slope, cracks and sliding interfaces,supporting effect of soil nailing and anti-slide pile were analyzed after each excavation in each group,all of which reflect the deformation and failure of slope directly or indirectly. Then , according to the deformation and failure of the slope, the best supporting project was chosen after compare.According to the study, for the temporarily excavated loess slope referred in this thesis, the way of support combined anti-slide pile with soil nailing on slope treatment engineering is feasible. The combination of soil nailing supporting style and anti-slide pile supporting style can play their own strongpoint in supporting slope well, and good supporting effect can be obtained at last.