Experimental Study on Distribution of Landslide Thrust in Pile-Anchor Structure based on Photoelastic Technique.

Xunchang Li,Wei Yang,Wenyong Zhang,Ke Yang,Pingan Li,Rui Xu

doi:10.3390/ma13061358

Abstract

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.

Highlights

In recent years, human engineering activity has become one of the main challenges on natural environment [1]
For the purpose of showing the load sharing ratio and distribution of landslide thrust in pilestructure before failure in landslide, the physical scale model tests are conducted based on photoelastic anchor structure before failure in landslide, the physical scale model tests are conducted based on technique
The effects of different material and pile length are investigated by 6 photoelastic test cases photoelastic technique

Summary

Introduction

Human engineering activity has become one of the main challenges on natural environment [1]. While anti-slide pile is the preferred method of controlling landslide in mountainous regions, when it comes to the large scale of landslides, sometimes a traditional cantilever single row pile can hardly provide considerable resistance to landslides [9,10], and if forced to be chosen (for example, larger pile diameter or longer pile length), the cost would be immense [3]. To such a situation, pile-anchor support system, as a new sliding bracing structure, has been successfully used to control large scale landslides, because of many advantages, such as more reasonable distribution of stress, lesser slope deformation, more anti-sliding force ability, more stably and constructed

Objectives

Methods

Results

Conclusion