地下砌体排水拱涵反力弹簧刚度研究  

Research on reaction spring stiffness of underground masonry drainage arch culvert

作　　者：陈逵 陈贝贝 王海 姚君 CHEN Kui;CHEN Beibei;WANG Hai;YAO Jun(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China;Changsha Municipal Housing and Urban-Rural Development Bureau,Changsha 410075,China;Changsha Public Engineering Construction Center,Changsha 410023,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]长沙市住房和城乡建设局,湖南长沙410075 [3]长沙市公共工程建设中心,湖南长沙410023

出　　处：《交通科学与工程》2024年第2期62-70,107,共10页Journal of Transport Science and Engineering

基　　金：长沙市政府“红旗渠主渠结构加固试验段工法研究及实施”项目(2000382-21)。

摘　　要：在设计地下砌体排水拱涵的全结构加固时,为了简化计算过程,将原拱涵结构与周围土体整体等效为反力弹簧。为了确定拱涵反力弹簧刚度参数正确性,探究影响拱涵反力弹簧刚度的因素,依托红旗渠项目的试验段,通过有限元法,分析砌体拱涵的材料强度、地基土层的承载力和泊松比,同时考虑了外侧土层与素填土层的含水率和泊松比对砌体拱涵反力弹簧刚度的影响。研究结果表明:侧墙反力弹簧系数随着原有浆砌片石侧墙砂浆强度的增加而增大;拱圈的反力弹簧系数随着原有砖砌拱圈砂浆与砖砌块强度的增强而增大;侧墙与拱圈反力弹簧系数随着地基土层承载力的提升而增大;侧墙反力弹簧系数随着地基土层、外侧土层、素填土层泊松比增大而增大;拱圈反力弹簧系数随着地基土层、外侧土层、素填土层泊松比的增大而减小;侧墙与拱圈反力弹簧系数随外侧土层、素填土层含水率的增大而减小;在对砌体拱涵进行计算时,将原砌体拱涵与周围土体等效为有限元法计算出的反力弹簧边界条件,并将计算结果与监测数据进行对比,发现有限元法计算的拱涵等效反力弹簧刚度具有较高的可靠性。In the structure reinforcement design of underground masonry drainage arch culvert,to simplify the calculation,the original arch culvert structure and the surrounding soil are equivalent to the reaction spring.In order to determine the correctness of the arch culvert reaction spring stiffness parameters and explore the factors that affect the stiffness of the arch culvert reaction spring,the finite element method was used based on the test section of Hongqiqu project.The material strength of masonry arch culvert,and the bearing capacity and Poisson's ratio of foundation soil layer were analyzed.The influence of moisture content of outer soil layer and plain fill soil layer and Poisson's ratio on the reaction spring stiffness of masonry arch culvert was considered.The results show that,the reaction spring coefficient of side wall increases with the increase of mortar strength of original mortar rubble side wall.The reaction spring coefficient of arch ring increases with the increase of the strength of the original brick arch ring mortar and brick block.The reaction spring coefficient of side wall and arch ring increases with the increase of foundation soil bearing capacity.The reaction spring coefficient of side wall increases with the increase of Poisson's ratio of foundation soil layer,outer soil layer and plain fill layer.The spring coefficient of arch ring reaction decreases with the increase of Poisson's ratio of foundation soil layer,outer soil layer and plain fill layer.The reaction spring coefficient of side wall and arch ring decreases with the increase of water content of outer soil layer and plain fill layer.The original masonry arch culvert and the surrounding soil are equivalent to the reaction spring boundary conditions calculated from the finite element method,then the whole structure reinforcement was calculated.The calculation results are compared with the monitoring data.The results show that the equivalent reaction spring stiffness of the arch culvert calculated by the finite element method is r

关 键 词：有限元 反力弹簧系数 砌体拱涵 土体含水率 泊松比 

分 类 号：TU992[建筑科学—市政工程]