高填方钢波纹管涵变形计算及涵土相对刚度系数研究  

Calculation of Deformation of High-filling Steel Corrugated Pipe Culvert and Study on Culvert Soil Relative Stiffness Coefficient

作　　者：魏瑞 曹周阳[3] 顾安全[1] WEI Rui;CAO Zhou-yang;GU An-quan(School of Highway, Chang＇an University, Xi＇an Shaanxi 710064, China;School of Civil and Architecture Engineering, Zhengzhou Institute of Aeronautical Industry Management, Zhengzhou Henan 450015, China;Sichuan Expressway Construction ＆ Development Corporation, Chengdu Sichuan 610041, China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]四川高速公路建设开发总公司,四川成都610041 [3]郑州航空工业管理学院土木建筑工程学院,河南郑州450015

出　　处：《公路交通科技》2018年第4期67-76,92,共11页Journal of Highway and Transportation Research and Development

摘　　要：为了获得高填方下钢波纹管涵变形的定量计算方法,并拟得到判定钢波纹管涵刚柔性的计算方法。在考虑钢波纹管涵受压变形与涵侧土体压缩变形相互影响的基础上,对涵土相对刚度问题进行了深入探讨。在考虑钢波纹管涵截面参数惯性矩特性的基础上,从分析规范中涵土相对刚度系数的计算方法入手,假设涵顶平面内外所受填土压力水平分布相同,涵侧填土对管涵横向变形产生一定的弹性抗力,引入了Spangler的涵土相互作用模型,推导了钢波纹管涵的变形计算公式和涵土相对刚度系数计算公式,同时,在考虑涵侧土体压缩变形模量线性增加的基础上,代入相关参数,将计算结果与现场试验结果进行比较,结果表明:钢波纹管涵洞随填土压力变化时,其变形计算值曲线规律与试验实测收敛值基本一致;应用推导的涵土相对刚度系数理论公式计算结果,可近似地判定管涵的刚柔性,通过理论计算,将本工点所用管涵判定为柔性涵洞,这也被试验测试得到涵顶垂直土压力系数小于1.0的结果间接验证,因此这既是对规范公式存在不足的补充,又为钢波纹管涵刚柔性的判定提供了新方法;通过涵土相对刚度系数公式的变换,得到涵顶平面内外土柱沉降差±δ与涵土相对刚度系数αs在本质上是相通的,故亦可用±δ判定涵土的相对刚度,这为判定涵洞刚柔性又提供了一种可行的方法。In order to obtain the quantitative calculation method of steel corrugated pipe culvert deformation under high-filling, and the calculation method for determining the rigidity and flexibility of steel corrugated pipe culverts,on the basis of considering the interaction of compression deformation of steel corrugated pipe culvert and its side soil,the problem of relative stiffness of culvert and soil is discussed. On the basis of considering the moment of inertia of the section parameters of steel corrugated pipe culvert,starting from analyzing the calculation method of soil relative stiffness coefficient of culvert in the specification, it is assumed that the horizontal distribution of filling earth pressure inside and outside the top plane of the culvert is the same,the side filling has a certain elastic resistance to the lateral deformation of pipe culvert,by introducing Spangler culvert soil interaction model,the calculation formulas of deformation and culvert soil relative stiffness coefficient of steel corrugated pipe culvert is derived. Meanwhile,based on considering thelinear increase of the compressive deformation modulus of culvert lateral soil, substituting related parameters,and the calculation value is compared with the field test value. The result shows that（1） when steel corrugated pipe culvert changes with filling pressure,the deformation calculation value rule is consistent with the measured convergence value;（2） using the theoretical calculation result of culvert soil relative stiffness coefficient can approximately determine whether the pipe culvert is rigid or flexible. By theoretical calculation,the studied field culvert is determined as a flexible culvert, which has also been tested indirectly by the result that culvert top vertical earth pressure coefficient is less than 1,therefore,this is not only a supplement to the specified formula,but also provides a new method for determination of the rigidity and flexibility of steel corrugated pipe culvert;（3） through the transformation o

关 键 词：桥梁工程 相对刚度系数 变形计算 钢波纹管涵洞 高填方 

分 类 号：U449.83[建筑科学—桥梁与隧道工程]