公路钢波纹管涵洞横截面变形及预拱设置研究

发布时间：2018-11-09 18:51

【摘要】：本文针对道路钢波纹管涵洞横截面变形特征,通过对国内外的资料搜集整理,并依据现场试验,通过有限元软件的仿真计算,针对波纹管涵洞在公路工程中遇到的问题进行研究。依据现场试验得出的变形情况,充分发挥有限元软件的优势,通过大量的有限元建模计算,研究钢波纹管涵洞的横截面变形及预拱设置。主要成果如下:1.通过现场试验,研究了波纹管涵洞横截面的变形,得出了波纹管涵洞在不同位置处的变形规律。(1)钢波纹管涵洞在两端部的横向和竖向变形均最小,在端部到车道路肩处变形值逐步增大,两路肩之间的变形趋于稳定。(2)钢波纹管涵洞的竖向变形数值大于横向变形的数值。2.通过有限元软件对几种影响因子下的变形规律和预拱设置进行分析,得到如下的规律:(1)钢波纹管涵洞的轴向截面的横向变形随着填土高度的增加而增加,并且增加的趋势呈现非线性趋势。在90°和270°位置处波纹管涵洞的横向变形最大,在管顶和管底位置处几乎为0。横向变形几乎是上下关于横向直径处对称的。(2)波纹管涵洞的竖向沉降也是竖着填土高度的增加而增加,也呈现出非线性变化的趋势。波纹管涵洞的管顶沉降最大,管底的沉降最小。(3)波纹管涵洞的横向变形和竖向变形数值跟回填基础的材料类型紧密相关,材料的弹性模量越大,波纹管的变形越小,并且不同的材料之间的变形程度是惊人的。变形数值也和管径的大小有关,变形值不是与管径呈现线性的变化趋势。(4)预拱设置的数值随着填土高度的增加而增加,不同的材料增长的快慢不同。相同管径下的预拱设置值并不是跟回填材料的弹性模量的大小呈现正相关或者负相关。论文的研究成果解决了一些目前公路建设过程中钢波纹管涵洞应用的问题,具有相当重要的理论和实用价值,具有广泛的推广前景。
[Abstract]:In this paper, according to the characteristics of cross section deformation of steel corrugated pipe culvert on road, through collecting and arranging the data at home and abroad, and according to the field test, the simulation calculation of finite element software is carried out. The problems of corrugated pipe culvert in highway engineering are studied. According to the deformation obtained from the field test, the advantages of the finite element software are brought into full play, and the cross-section deformation and pre-arch setting of the steel bellows culvert are studied through a large number of finite element modeling and calculation. The main results are as follows: 1. The deformation of the cross section of the corrugated pipe culvert is studied through field tests, and the deformation law of the corrugated pipe culvert at different positions is obtained. (1) the transverse and vertical deformation of the corrugated pipe culvert at both ends is the smallest. The deformation between the two kerbs increases gradually from the end to the kerb of the driveway. (2) the vertical deformation of the corrugated steel pipe culvert is greater than that of the transverse deformation. 2. The deformation law and pre-arch setting under several influence factors are analyzed by finite element software. The following laws are obtained: (1) the transverse deformation of the axial section of the steel bellows culvert increases with the increase of the filling height. And the increasing trend shows a nonlinear trend. The transverse deformation of corrugated pipe culvert is the largest at 90 掳and 270 掳, and is almost 0 at the top and bottom of the pipe. (2) the vertical settlement of corrugated pipe culvert increases with the increase of vertical filling height, and shows a trend of nonlinear variation. (3) the transverse and vertical deformation values of corrugated pipe culvert are closely related to the material type of backfill foundation, the greater the elastic modulus of material, the smaller the deformation of bellows. And the degree of deformation between different materials is astonishing. The deformation value is also related to the diameter of the pipe, and the deformation value is not linear with the diameter of the pipe. (4) the value of pre-arch increases with the increase of the filling height, and the growth rate of different materials varies. The pre-arch setting value of the same pipe diameter is not positively or negatively correlated with the elastic modulus of the backfill material. The research results of this paper have solved some problems in the application of corrugated steel pipe culverts in the process of highway construction at present. It has important theoretical and practical value and has a broad prospect of popularization.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U449.831

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