成兰黑河大桥桥岸边坡多排桩抗震支护设计研究  

Study on Seismic Design of Multi-piles at the Slope on Black-river-bridge Shore

作　　者：赖杰 郑颖人 朱威 唐晓松 阿比尔的[5] 

机构地区：[1]火箭军士官学校工程施工技术教研室,山东青州262500 [2]陆军勤务学院军事设施系,重庆400041 [3]重庆市地质灾害防治中心,重庆400041 [4]岩土力学与地质环境保护重庆市重点实验室,重庆401311 [5]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《地下空间与工程学报》2017年第6期1671-1677,共7页Chinese Journal of Underground Space and Engineering

基　　金：科技部973项目(2011CB710603);科技部973项目(2011CB013602)

摘　　要：相对单排桩支护,多排桩的结构更为复杂,由于桩体之间的限制作用,传统的计算方法难以得到多排桩分担力的大小、应力分布情况,在进行抗震设计时,更无法考虑桩–土之间的动力效应,最后往往采用经验的方法,从而使设计失真。基于此,本文将强度折减动力分析法引入到多排桩的抗震设计中,提出了多排桩抗震设计新思路。该法能够考虑桩-土的动力效应,在所求的支护边坡动静力安全系数情况下,同时得到支护结构力的分布情况,较以往方法有很大的进步。通过对成兰黑河大桥桥岸边坡工程的抗震设计,描述了该法的运用过程,论证了此法的可行性。The structure of multi-piles is more complex than single-row pile,because of the limit between piles,it is difficult to obtain the stress distribution and stress magnitude of piles by traditional method of calculation.Besides,in the face of earthquake resistant design,the dynamic effects between the Earth and pile still can＇t be taken into account,except using experience method,so the design is distorted.Based on this phenomenon,this article will introduce strength reduction method for dynamic analysis in seismic design of pile,putting forward a new idea of seismic design of pile.This method can take into account the dynamic effects between pile and soil,calculating the dynamic and static safety factor of a supported slope,even the distribution of support structure,which are shown great progress than ever before.Through the seismic design of the slope on Black-River-Bridge shore,it is shown the process when using this method and demonstrates the feasibility of this method.

关 键 词：多排桩 抗震设计 动力效应 强度折减 

分 类 号：TU435[建筑科学—岩土工程]