Midas/GTS在边坡稳定性与地基沉降分析中的应用  

Application of Midas/GTS in analysis of a foundation settlement

作　　者：王珂[1] 李顺群[1,2,3] 李珊珊[1] 

机构地区：[1]天津城市建设学院土木工程系,天津300384 [2]冻土工程国家重点实验室,甘肃兰州730000 [4]天津市软土特性与工程环境重点实验室,天津300384

出　　处：《辽宁工程技术大学学报（自然科学版）》2012年第3期362-365,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(51178290);教育部科学技术研究重点基金资助项目(210004);冻土工程国家重点实验室开放基金资助项目(SKLFSE200906);天津市自然科学基金资助项目(11JCYBJC02900)

摘　　要：为了解决边坡稳定性与地基沉降对建筑物的影响,根据工程地质条件、地基处理方案、桩位布置及其他相关资料,基于Midas/GTS软件建立了某人工地基沉降和稳定性分析的二维施工过程模型.模拟并分析了三种不同施工工况条件下地基沉降的差别,同时对土层的位移场、应力场进行了对比分析,从不同角度对地基的稳定性进行了评估.分析表明:处理后的地基沉降量比较均匀,土层水平位移较小;地基的位移和应力以及桩基的位移均符合相关要求,土坡稳定性安全系数高.因此,该人工地基是安全可靠的.进一步的研究表明,为了增强该场地的安全性,可以采取开挖减压沟等工程措施.本文可以为类似地质条件的地基设计和施工过程控制提供理论参考和工程措施.In order to investigate the impact of foundation settlement on building,based on the engineering geological conditions,the schemes of soil foundation,the pile layout of the foundation as well as the relevant technical data,a two-dimensional simulation model on foundation settlement and stability analysis was developed for a foundation site using Midas/GTS software.The model can simulate and analyze the differences of foundation settlement under three different construction conditions.In addition,the safety factors of slope stability have been given,and the foundation stability has been estimated from different aspects.The analysis results show that the foundation settlement of an improved foundation is uniform,and the horizontal displacement of soil layer is minor.The strain and stress of foundation and displacement of pile foundation both meet the quality requirements,and the slope stability safe factor is high.Therefore,the foundation is safe and stable.Further study shows that it is necessary to take some engineering measures for improving stability of foundation area,such as excavating decompression ditch.This paper can be used as a theoretical and practical reference for foundation design and construction with similar geological conditions.

关 键 词：地基 桩 应力应变 数值模拟 承载力 侧向变形 建筑物 安全性 

分 类 号：TU470+.3[建筑科学—结构工程]