RESEARCH ON NEW TYPE EPS ANTI-SLIDE PILE AND LARGE-SCALE SHAKING TABLE CONTRAST TEST

Abstract

Anti-sliding pile is a common engineering method in treatment of geological hazards, which is widely used in rail, road, and water conservancy engineering. And engineer pay more and more attention to the seismic problem of this anti-slide structure, it has already been an important research direction to study how to improve the seismic performance of retaining structures. Currently, it has caught the engineers' attention and achieved good results to improve the seismic performance by adding EPS flexible materials to engineering. Based on this, in order to improve and meet seismic performance request of anti-sliding pile in engineering, EPS material is applied to anti-sliding and a new anti-sliding is designed called EPS pile. By shaking table test, the dynamic response and seismic performance of EPS pile and ordinary pile indoor are researched and compared. Conclusions could be drawn from trail that:(1) the acceleration magnified effect is different with different seismic waves; with more lager EL seismic peak acceleration, the more obvious of acceleration magnified effect; (2) the acceleration magnified effect of ordinary pile is more obvious than of EPS pile under the same peak acceleration of seismic wave.(3) Pile head angle and acceleration magnified effect show that: EPS anti-sliding has better seismic performance; EPS material can clearly improve the passive earth pressure of anti-sliding pile under pole shaking condition and Bi-directional vibration.(4) Besides, it can be found in this experimental that sliding surface cracks to the deep extension and may induce deep sliding with the increase of seismic wave speed.