辽宁工程技术大学学报（自然科学版）2024，Vol.43Issue(1)：20-29,10.DOI:10.11956/j.issn.1008-0562.2024.01.003
车辆载荷作用下桩后黏性土主动土压力分析
Analysis of active earth pressure of cohesive soil behind piles under highway vehicle load
摘要
Abstract
In view of the problem that the dynamic effect of vehicle load on the supporting structure is not taken into account when calculating the active soil pressure behind the pile in the existing design code,a formula for calculating the active soil pressure under the vehicle load is derived based on the assumption of plane sliding surface,combined with the pseudo-dynamic analysis method and considering the effect of the inertial force on the soil mass behind the pile under the vehicle dynamic load.The resultant force of active earth pressure is divided into a dynamic earth pressure component and a static earth pressure component.The influence of soil weight and external friction angle of pile-soil on the resultant force of active earth pressure is analyzed,and the influence of horizontal vibration acceleration coefficient,internal friction angle,driving speed and distance between piles on dynamic earth pressure is analyzed,and compared with the active earth pressure distribution law under different cohesive force.The research results show that the dynamic earth pressure behind piles is non-linear distribution;during a period of vibration,the resultant force of the active soil pressure behind the pile increases first and then decreases with the increase of the dip angle of the sliding surface and the duration of time;the dynamic pressure amplitude decreases with the increase of pile spacing,and the vibration period increases with the increase of vehicle speed.关键词
车辆载荷/支护桩/黏性土/非线性分布/拟动力法Key words
vehicle load/support pile/clayey soil/nonlinear distribution/pseudo-dynamic method分类
建筑与水利引用本文复制引用
李涛,张添琦,吴雨停,王文博..车辆载荷作用下桩后黏性土主动土压力分析[J].辽宁工程技术大学学报（自然科学版）,2024,43(1):20-29,10.基金项目
国家自然科学基金项目(42172319 （）
51508556) （）
中央高校基本科研业务费专项资金项目(2020YJSLJ14) （2020YJSLJ14）
