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该文结合依托工程,对高填土大跨钢波纹管涵的力学性能进行了现场测试和有限元分析,并探讨了钢管波纹参数、管顶填土高度、土体弹模、不对称填土、地基不均匀沉降等对钢波纹管涵应力和变形的影响。结果表明:钢波纹管涵变形和应力随填土高度增加而增长,但增长趋势逐渐变缓、土-拱效应明显;有限元分析与试验结果相吻合,表明有限元模型能够满足设计精度要求;钢波纹管最大变形和等效应力随波高、土体弹模增大而减小,随波距增加而增大。最后,将各国规范的设计计算结果与有限元、测试结果进行对比,提出钢波纹管涵土压力设计计算采用AASHTO或中规、管壁应力设计计算采用CHDBC的建议。
Based on the relying on the project, the field test and finite element analysis of the mechanical properties of high-filled large-span steel corrugated culverts are carried out. The parameters of corrugated steel tube, such as the corrugation parameters of steel pipe, the fill height of pipe top, elastic modulus of soil, asymmetric filling , Uneven foundation settlement and other effects on the stress and deformation of the steel bellows. The results show that the deformation and stress of steel corrugated pipe culverts increase with the increase of fill height, but the increasing trend becomes slower and the soil-arch effect is obvious. The finite element analysis is in good agreement with the experimental results, indicating that the finite element model can meet the design requirements. The maximum deformation and equivalent stress of the steel bellows decreases with the wave height and the elastic modulus of the soil increases, but increases with the increase of the wave pitch. Finally, the standard design calculation results of all countries are compared with the finite element and test results, and the suggestions of design and calculation of the wall pressure of steel corrugated pipe using AASHTO or Chinese gauge and the stress calculation of the wall using CHDBC are proposed.