Study on deformation evolution stage of pile-soil system based on new model test

Abstract

In order to explore the evolution mode of pile-soil interaction formed by landslide under the reinforcement of anti-slide piles, and to establish a landslide stability evaluation standard based on the synergistic deformation and failure characteristics of pile-soil interaction system, the indoor model test was carried out by means of indoor test, relying on the existing engineering cases, and the model test device of pull-type landslide anti-slide pile was used to simulate the interaction between pile and soil during landslide sliding. the soil pressure, pile strain, pile displacement and macro deformation of slope were monitored by preset monitoring device. The macroscopic deformation characteristics of landslide-anti-slide pile system, the strain variation characteristics of pile body and the variation characteristics of soil pressure on pile in the process of progressive failure of landslide in different stages were obtained. Taking this as the basis for the division of the evolution stage of the system, the evolution stage of the pile-soil interaction deformation of the small landslide-anti-slide pile system was divided into: the initial compaction stage, crack propagation stage, residual yield stage and pile-soil failure stage. Based on the macroscopic deformation characteristics of the slope and the anti-slide pile at different stages, a more intuitive division standard of different stages under the evolution mode of pile-soil interaction was established.

Keywords

slope engineering / pile-soil interaction / experimental study / anti-slide pile