固化土回填下拱涵涵顶垂直土压力计算方法研究  

RESEARCH ON THE CALCULATION METHOD OF VERTICAL EARTH PRESSURE AT THE TOP OF ARCH CULVERT UNDER SOLIDIFIED SOIL BACKFILL

作　　者：沈科元 杨建宇[2] 曾乐 刘文轩 刘义平 Shen Ke-yuan;Yang Jian-yu;Zeng Le;Liu Wen-xuan;Liu Yi-ping

机构地区：[1]中铁城建集团有限公司,长沙410208 [2]长沙理工大学,长沙410114

出　　处：《建筑技术开发》2024年第11期118-121,共4页Building Technology Development

基　　金：湖南省水利科技基金项目(XSKJ2022068-24)。

摘　　要：研究依托某拱涵地下排水工程,采用数值模拟的方法,探明了拱涵涵顶垂直土压力的分布特性,通过理论分析建立了涵顶垂直土压力分布特性的拱涵土压力计算模型,利用正交试验与回归分析得出涵顶平面内土柱应力集中系数Nf,并推导出拱涵涵顶垂直土压力理论公式。结果表明:拱涵涵顶垂直土压力理论公式通过涵顶平面内土柱应力集中系数Nf较好地反映了涵顶垂直土压力呈倒V形分布的特征,且计算结果与数值模拟结果较为吻合。Based on a certain arch culvert underground drainage project,numerical simulation was used to investigate the distribution characteristics of vertical soil pressure on the top of the arch culvert.Through theoretical analysis,a calculation model for arch culvert soil pressure considering the distribution characteristics of vertical soil pressure on the top of the culvert was established.Orthogonal experiments and regression analysis were used to obtain the stress concentration factor Nf of the soil column in the plane of the culvert top,and the theoretical formula for vertical soil pressure on the top of the arch culvert was derived.The results show that the theoretical formula for the vertical soil pressure on the top of the arch culvert reflects the inverted V-shaped distribution of the vertical soil pressure on the culvert top through the stress concentration factor Nf of the soil column in the plane of the culvert top,and the calculated results are in good agreement with the numerical simulation results.

关 键 词：固化土 垂直土压力 正交试验 回归分析 

分 类 号：TU432[建筑科学—岩土工程]