铁道标准设计2018，Vol.62Issue(1)：23-28,6.DOI:10.13238/j.issn.1004-2954.201702110001
微型桩地震动力特性数值模拟研究
Research on Seismic Dynamic Numerical Simulation of Micropiles
摘要
Abstract
Micropile is a new retaining structure of side slope.As relatively much energy is dissipated when earthquake takes place,micropile is thus prioritized for earthquake emergence rescue in slope engineering.At present,the research on micropile is focused on static characteristics and less is on the dynamic characteristics of micropiles.In this paper,the dynamic characteristics of herringbone micropiles and parallel micropiles are analyzed and studied with the aid of the numerical software of FLAC3d.The results show that the distributive characteristics of "S" shape are demonstrated by the bending moment of two types of micropiles under earthquake action,and the shearing force is distributed in the shape of "〉";when the seismic peak acceleration remains less than 0.4g,small impact is generated on the bending moment and the shearing force of different types of micropiles due to earthquake action;when the seismic peak acceleration becomes more than or equal to 0.4g,greater impact is caused;in comparison with the parallel micropiles,herringbone micropiles have large bending moment and small shearing force,and thus is found with strong seismic bearing capability and better anti-seismic efficiency.关键词
微型桩/动力特性/数值模拟/弯矩/剪力Key words
Micropile/Dynamic characteristics/Numerical simulation/Bending moment/Shear force分类
天文与地球科学引用本文复制引用
牛文庆,郑静,施艳秋,吴红刚..微型桩地震动力特性数值模拟研究[J].铁道标准设计,2018,62(1):23-28,6.基金项目
青海省交通建设科技项目(2010-03 （）
)甘肃省自然科学基金项目(145RJZA068) （145RJZA068）
