图珲公路高填方涵洞竖向荷载分布试验研究

发布时间：2018-06-19 11:52

本文选题：高填方涵洞 + 室内模型试验　；参考：《地下空间与工程学报》2014年04期

【摘要】：为了研究高填方涵洞顶部土压力随填土高度变化的规律以及拱效应,依据相似原理设计了宽坦沟谷沟心设涵边界条件的涵洞室内模型试验,测得不同填土高的涵洞顶部土压力和涵台外侧土压力;选取图们—珲春高速公路桩号为RK392+640处高填方涵洞作为试验涵洞,在涵顶埋设土压力盒测量不同填土高度的涵顶竖向土压力;按照《公路桥涵设计通用规范(JTG D60-2004)》计算土压力,比较并分析计算值与实测值的误差。结果表明,涵顶土压力随着填土的增加而增加,当填土达到一定高度后,高填方涵洞上方将产生拱效应,由于涵顶路基填料的特点,拱效应具有不稳定性,从而使土压力的增加幅度变小,涵顶土压力也随填土高度呈现非线性规律变化。
[Abstract]:In order to study the variation of soil pressure at the top of high fill culvert with the filling height and the arch effect, the indoor model test of culvert with culvert boundary condition in the center of Guantan gully was designed according to the similarity principle. The soil pressure at the top of culvert and the lateral earth pressure of culvert platform were measured, and the high fill culvert at RK392,640 of pile number of Tumen Hunchun Expressway was selected as the experimental culvert. The vertical earth pressure of culvert with different filling height is measured in the soil pressure box at the top of culvert, the earth pressure is calculated according to the general code for highway bridge and culvert design (JTG D60-2004) >, and the error between the calculated value and the measured value is compared and analyzed. The results show that the pressure of culvert top increases with the increase of fill. When the fill reaches a certain height, the arch effect will occur over the culvert of high fill, and the arch effect will be unstable because of the characteristics of the filling of the culvert top subgrade. Therefore, the increase of soil pressure becomes smaller, and the soil pressure of culvert is nonlinear with the height of fill.
【作者单位】：吉林大学建设工程学院;河南工程学院资源与环境学院;中煤科工集团西安研究院;
【基金】：国家重点基础研究发展计划“973”资助项目(2010CB731503)
【分类号】：U449

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