Mechanical characteristics of anchored slide-resistant piles under the condition of composite multilayer sliding bed
WANG Guihua1，LI Changdong1，2，CHEN Wenqiang1，XIONG Shuang1，YU Miao1，ZHANG Huawei1
(1. Faculty of Engineering，China University of Geosciences(Wuhan)，Wuhan，Hubei 430074，China；
2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，Chengdu，Sichuan 610059，China)
Abstract：Aiming at that the existing calculation model of anchored slide-resistant piles fails to fully consider the actual geological conditions，a calculation and analysis model of anchored slide-resistant piles under the condition of compound multilayer sliding bed was established based on the theory of deformation coordination. The tension forces of each row of cables can be solved by simultaneous equations，and then the distributions of the internal force and displacement of anti-slide piles are obtained. The control conditions of the calculation model were improved and the rationality of the improved calculation model was verified by the displacement of the pile top and the stress of the pile side. The computation program of the improvement method was written by MATLAB and two project cases were calculated by both improved and traditional algorithms. Comparisons between the calculation results of two cases by numerical simulation and practical monitoring data show that the improved algorithm is more accurate than the traditional algorithm and that both the deformation and the internal force of the pile calculated by the improved algorithm are smaller than those by the traditional algorithm. For two cases，to be specific，the displacements of the pile top decrease by 17.0% and 28.7% respectively and the maximum bending moments decrease by 10.64% and 20.90% respectively. It is indicated that the traditional method is conservative for design and hence results in a higher project cost. The proposed method can provide a theoretical basis and reference for the design of anchored slide-resistant piles in the area of composite multilayer rock mass.
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2019, Vol. 38 
