高填方大跨双孔钢波纹管涵测试与分析

发布时间：2019-01-17 09:37

【摘要】：为了解双孔钢波纹管涵应用于高填方路基时径向土压力及变形特性,结合依托工程,通过现场试验,并精细化有限元建模方法对其进行分析。结果表明,双孔2-φ5.5 m钢波纹管涵,变形与径向土压力随着填土高度的增加而增大,填土高度达到管顶24 m尚未出现明显土拱效应;径向土压力沿管周分布呈椭圆形,采用双孔管涵,结构受力与单管涵基本相同,最大径向土压力出现位置不同,位于管斜下方45°位置;有限元分析与试验结果相吻合,表明有限元分析模型精度满足工程要求。最后,将公路桥涵规范中土压力计算结果与有限元、测试结果进行对比,规范计算得到的最大土压力偏大,最小土压力偏小。
[Abstract]:In order to understand the radial earth pressure and deformation characteristics of double-hole steel corrugated pipe culvert applied to high filling subgrade, combined with supporting engineering, field test and fine finite element modeling method were used to analyze it. The results show that the deformation and radial earth pressure increase with the increase of the filling height, and the soil arch effect is not obvious when the fill height reaches 24 m at the top of the pipe. The results show that the deformation and the radial earth pressure of the steel corrugated pipe culvert with two holes 2- 蠁 5.5 m increase with the increase of the filling height. The radial earth pressure is elliptical along the circumference of the pipe. The double hole pipe culvert is adopted. The structural force is basically the same as that of the single pipe culvert. The position of the maximum radial earth pressure is different and is located at 45 掳below the pipe slope. The results of finite element analysis and test show that the precision of finite element analysis model meets the requirement of engineering. Finally, the calculated results of soil pressure in the code of highway bridge and culvert are compared with the results of finite element method. The maximum earth pressure and the minimum earth pressure obtained by the code calculation are on the high side and the minimum earth pressure is small.
【作者单位】：湖南大学风工程与桥梁工程湖南省重点实验室;湖南省交通规划勘察设计研究院;
【基金】：湖南省交通运输厅科技进步与创新计划(201324、201124) 湖南省自然科学基金(14JJ2047)
【分类号】：U449.83

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