基于流固耦合瞬态分析法拓宽路基工程沉降处治机理研究  

Study on Mechanism of Settlement Treatment for Subgrade Widening Based on Fluid-solid Coupling Transient Analysis

作　　者：陆钊 左人宇 陈锐[2] 徐涛[2] 

机构地区：[1]深圳市工勘岩土工程有限公司岩土工程设计所,广东深圳518026 [2]哈尔滨工业大学深圳研究生院深圳市城市与土木工程防灾减灾重点实验室,广东深圳518055

出　　处：《路基工程》2014年第4期71-77,共7页Subgrade Engineering

基　　金：深圳市科技研发资金(编号CXZZ20120829154820942);深圳市龙岗区软科学研究项目(深龙科[2011]3);中国水利水电科学研究院科研专项(岩集1238)

摘　　要：基于流固耦合瞬态分析方法,运用ABAQUS有限元软件,对路基拓宽工程从施工到工后运营进行数值模拟。把拓宽路基工程未处理的工况与加土工格栅处治的情况进行对比,在讨论孔隙水压力变化的前提下,综合分析了沉降曲线,应力分布特点,有效应力的变化,对拓宽路基工程的工后沉降机理进行了探讨。同时,通过观察孔压的分布变化,有效应力和沉降的对比分析,运用固结原理的经典理论进行解释,讨论了土工格栅处治拓宽路基固结沉降的作用原理,为工程实践提供参考。Based on fluid-solid coupling transient analysis method, numerical simulation was conducted, with ABAQUS finite element software, in relation to subgrade widening engineering from construction to postconstruction operation. Then the comparison between the cases untreated and with geo-grid was made. At the premise of discussion on variation of the pore water pressure, the settlement curve and stress distribution features, and the effective stress variation were studied comprehensively, and the mechanism of postconstruction settlement therein was discussed. At the same time, through observation of the pore pressure distribution variation, and comparative analysis of the effective stress and settlement, the explanation may be given with the classical theory of consolidation principle, and then how the geo-grid deals with the consolidated settlement of widened subgrade was discussed, which offers reference to engineering practice.

关 键 词：拓宽路基 流固耦合瞬态分析 有效应力 孔压 沉降 土工格栅 有限元 

分 类 号：TU433[建筑科学—岩土工程]