| Anchor anti-slide pile(hereinafter referred to as anchor-pull pile)is one of the commonly used methods for slope reinforcement in landslide control and civil engineering,traffic,water conservancy and other engineering construction.At present,the theory and method of static calculation of anchor-pull pile is mature,but it is often combined with quasi-static method when used in seismic design,which can not reflect the true dynamic failure mechanism of anchor-pull pile.It makes this economical and reasonable engineering structure depend more on experience when it is used for seismic reinforcement.The rock-socketed depth of anchor-pull pile is an important design parameter of anchor-pull pile.The dynamic response characteristics of rock-socketed section of anchor-pull pile against sliding pile are studied in order to provide a theoretical basis for seismic design of slope treatment.It has great theoretical and practical significance.The paper base on the project of Yunnan applied basic research project "Study on Seismic Dynamic Response Characteristics and Seismic Study of Prestressed Anchor Cable Anti-Slide Piles with Base Hinge Support",the dynamic response characteristics of rock-socketed section of hinged anchor-pull pile against sliding pile are analyzed and studied by means of shaking table model experiment and numerical simulation.The main research work of this paper is as follows:(1)Based on the results of shaking table test,paper analyse the seismic response characteristics of anchor pile structure with different rock socketed depth.In this paper,the displacement response,acceleration response,soil pressure response,axial force response of anchor pile and displacement response of pile top under earthquake loading are analyzed in detail and systematically.(2)Based on the finite difference theory,three-dimensional numerical simulation is carried out by using FLAC3 D 6.0.The displacement,acceleration,stress-strain and bending moment of the whole model slope system and supporting structure system are analyzed and studied.(3)Through the comparison between the results of large-scale shaking table test and numerical simulation,the influence of rock-socketed depth of anchoring pile on the seismic response of supporting structure is obtained,and the influence of rock-socketed depth on the seismic response of supporting structure is obtained.It provides the basis for improving the anti-seismic design method of anchor-pull pile. |
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