Li Xunchang, Xu Rui, Yang Wei, Li Pingan, Yang Ke, Zhang Wenyong
School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China.
Materials (Basel). 2020 Mar 17;13(6):1358. doi: 10.3390/ma13061358.
This paper aimed to perform systematical study on the distribution of landslide thrust in pile-anchor support system, which has been a widely applicable treatment method in landslide control with safety, highly efficiency and adaptation. The advantage of photoelastic technique is visualization of strain and stress fields, therefore photoelastic model tests are conducted to show the distribution of landslide thrust in pile-anchor structure before failure in landslide. The effects of different materials and pile lengths are investigated by 6 photoelastic test cases under different loading conditions. It can be found from quantitative analysis of experimental results that load proportion of anchor would increase gradually with the decrease of pile embedded depth or the increase of landslide thrust force. Meanwhile, landslide thrust distribution in pile-anchor structure is directly affected by the stiffness of piles. The pile-anchor structure is significantly better at reducing bending moment value and optimizing bending moment distribution of pile. Finally, some theoretical analysis and design suggestions are proposed based on the experimental study.
本文旨在对桩锚支护体系中滑坡推力分布进行系统研究，桩锚支护体系是一种在滑坡治理中广泛应用且安全、高效、适应性强的治理方法。光弹性技术的优点是能使应变场和应力场可视化，因此开展了光弹性模型试验以展示滑坡破坏前桩锚结构中滑坡推力的分布情况。通过6个光弹性试验工况，在不同加载条件下研究了不同材料和桩长的影响。从试验结果的定量分析可以发现，随着桩埋深减小或滑坡推力增大，锚索的荷载分担比例会逐渐增加。同时，桩锚结构中滑坡推力分布直接受桩的刚度影响。桩锚结构在减小桩的弯矩值和优化弯矩分布方面效果显著。最后，基于试验研究提出了一些理论分析和设计建议。
