地震力作用下单排与双排桩支挡结构性状试验对比分析

桩板式挡土结构由抗滑桩发展而来,可用于一般地区、浸水地区和地震区的边坡工程支挡;对于地震区边坡,采用单排或双排支挡结构的形式及其支挡效果尚缺少深入研究。本文基于地震力作用下单排、双排桩板结构在不同加载等级时的桩身土压力、土体加速度、桩身位移等变化的振动台模型试验结果,对比采用单排、双排桩板结构边坡的支挡效果,得出静力状态和不同加速度峰值地震力作用桩前后土压力分布、桩后土体加速度分布和桩体位移的一些规律,为今后边坡桩板式支挡结构的抗震设计提供参考。

Contrastive Experimental Analysis of Characteristics of Single-and Double-row Pile Retaining Structures under Earthquakes

Pile-sheet retaining wall developed from anti-slide piles could be used as the retaining structure for slope engineering in normal, inundated, and seismic areas. However, the retaining effect of single-or double-row pile-sheet structures in earthquake areas has not been well researched yet. In this study, the practical application of single-and double-row pile-sheet retaining structures is analyzed based on shaking table model test. Soil pressure, soil peak acceleration, and pile displacement are then compared between the two types of piles at different levels of loads. The deformation characteristics of the retained slope under static and dynamic situations are summarized. Results may provide reference for seismic design of pile-sheet retaining structures.