地下水位下降引起既有建筑物地基沉降的分析方法
发布时间：2019-03-14 16:52
【摘要】：针对地下水位下降引起既有建筑物地基沉降问题,首先,依据太沙基有效应力原理,建立地下水位下降引起附加应力的分析方法。其次,考虑地基土的孔隙介质特点,从地基土宏观与微观应力和应变分析入手,获得了在初始应力和因地下水位下降引起的附加应力作用下的既有建筑物地基土变形力学参数变化关系,它充分反映了地基土体宏观与颗粒骨架微观变形的不协调性。然后,引进分级加载和分层总和的思想,建立了地下水位下降引起既有建筑物地基沉降的非线性分析新方法,其可同时反映既有建筑物地基因初始应力和地下水位下降产生的附加应力作用引起的地基土变形力学参数变化的影响。
[Abstract]:In view of the settlement of existing buildings caused by the drop of groundwater level, firstly, according to the effective stress principle of Terzaghi, the analysis method of additional stress caused by the drop of groundwater level is established. Secondly, considering the characteristics of pore medium of foundation soil, starting from the analysis of macro-and micro-stress and strain of foundation soil, Under the action of initial stress and additional stress caused by the drop of groundwater level, the variation relation of deformation mechanical parameters of existing building foundation soil is obtained, which fully reflects the incompatibility between macro-deformation of foundation soil and micro-deformation of particle skeleton. Then, the idea of hierarchical loading and stratified summation is introduced, and a new nonlinear analysis method for foundation settlement of existing buildings caused by the drop of groundwater level is established. It can reflect at the same time the influence of the initial stress of existing buildings and the change of mechanical parameters of ground soil deformation caused by the additional stress caused by the drop of groundwater level.
【作者单位】： 湖南大学岩土工程研究所;
【基金】：国家自然科学基金资助项目(51378198) 高等学校博士学科点专项科研基金项目(20130161110017)
【分类号】：TU433
[Abstract]:In view of the settlement of existing buildings caused by the drop of groundwater level, firstly, according to the effective stress principle of Terzaghi, the analysis method of additional stress caused by the drop of groundwater level is established. Secondly, considering the characteristics of pore medium of foundation soil, starting from the analysis of macro-and micro-stress and strain of foundation soil, Under the action of initial stress and additional stress caused by the drop of groundwater level, the variation relation of deformation mechanical parameters of existing building foundation soil is obtained, which fully reflects the incompatibility between macro-deformation of foundation soil and micro-deformation of particle skeleton. Then, the idea of hierarchical loading and stratified summation is introduced, and a new nonlinear analysis method for foundation settlement of existing buildings caused by the drop of groundwater level is established. It can reflect at the same time the influence of the initial stress of existing buildings and the change of mechanical parameters of ground soil deformation caused by the additional stress caused by the drop of groundwater level.
【作者单位】： 湖南大学岩土工程研究所;
【基金】：国家自然科学基金资助项目(51378198) 高等学校博士学科点专项科研基金项目(20130161110017)
【分类号】：TU433
【参考文献】
相关期刊论文 前3条
1 于祺;;降水引起成层土附加应力及地表沉降的研究[J];地下空间与工程学报;2013年01期
2 施成华;彭立敏;;基坑开挖及降水引起的地表沉降预测[J];土木工程学报;2006年05期
3 邵龙潭;孙益振;;考虑孔隙变形的孔隙介质本构关系初探[J];岩土力学;2006年04期
【共引文献】
相关期刊论文 前10条
1 唐习龙;林可勃;贾妮;李忠;;结构计算软件中的模块化设计[J];四川建筑科学研究;2005年06期
2 钱坤;尹新生;朱珊;佴磊;;三维地基沉降计算公式的改进与比较[J];四川建筑科学研究;2009年03期
3 熊学玉;王绍辉;;现浇空心板的正交异性板理论分析方法的研究[J];四川建筑科学研究;2010年05期
4 郝婷s，
本文编号：2440169
本文链接：https://www.wllwen.com/jingjilunwen/jianzhujingjilunwen/2440169.html
