考虑分布角法的沿涵洞纵向竖向土压力分析和试验

发布时间：2018-01-31 05:19

  本文关键词： 高填方涵洞 现场测试 竖向土压力 分布角法 拱效应　出处：《中外公路》2014年06期 　论文类型：期刊论文

【摘要】：为了研究沿涵洞纵向不同位置的涵顶竖向土压力的分布规律,基于分布角法推导了距离涵洞口不同位置的涵顶竖向土压力的计算方法。选取吉林省图们至珲春高速公路桩号为RK365+510的高填方涵洞作为试验涵洞,在涵顶埋设土压力盒测量当填土高度为12、16和20m时,距离涵洞口不同位置的涵顶竖向土压力。分析了竖向土压力沿涵洞纵向的分布规律,探讨了拱效应,分析了基于分布角法推导的土压力计算值和实测值的误差。结果表明:基于分布角法的涵顶竖向土压力的计算和试验结果较接近。离涵洞口较近时,压力盒的应力集中使实测值大于计算值;随着纵向长度的增加,涵顶拱效应使实测值小于计算值。采用规范"土柱法"的计算值偏大造成结构设计过于安全而不经济。建议涵洞可分段设计并采用不同的尺寸。
[Abstract]:In order to study the distribution along the longitudinal culvert in different position of the vertical earth pressure, distance calculation method of culvert mouth in different position of the vertical earth pressure distribution based on angle method is deduced. From Jilin province to Hunchun Tumen Expressway pile No. RK365+510 high embankment culvert culvert culvert as a test, the buried soil pressure box when measuring the filling height of 12,16 and 20m, from the culvert mouth in different position of the vertical earth pressure. Analysis of the vertical earth pressure distribution along the longitudinal culvert, discusses the arch effect, analyzes the error value and the measured value of earth pressure calculation method is derived based on the angular distribution. The results show that the calculation and test results the distribution angle method based on vertical earth pressure is close. From the culvert mouth close, pressure of stress concentration so that the measured value is greater than the calculated value; with the increase of the longitudinal length of the culvert, arch effect The measured value is less than the calculated value. The calculation value of the standard "soil column method" is too large, which makes the structural design too safe and not economical. It is suggested that culverts can be segmented and designed with different sizes.

【作者单位】： 吉林大学建设工程学院;河南工程学院资源环境学院;
【基金】：国家重点基础研究发展计划“973”项目(编号:2010CB731503) 吉林省交通厅科技项目(编号:2011417)
【分类号】：U449
【正文快照】： 1前言建设山岭重丘区高速公路时,考虑到保护植被和水土生态环境,有效利用路堑开挖的土石方,设计者常常选择修建高路堤来代替桥梁。埋置于高路堤的涵洞上方填土较高,有些路段已达到50 m,关于高填方涵洞的试验研究资料比较罕见,j賘賘賘賘賘賘賘賘賘賘賘賘賘賘賘賘賘賘賘賘賘賘，

本文编号：1478305