公路涵管结构设计方法研究

结合试验结果和工程调查资料,对公路规范、铁路规范、美国公路规范的涵管结构设计方法进行了比较分析,同时提出考虑涵管与土共同作用的设计计算方法,给出涵管截面弯矩计算公式。分析表明美国公路规范、铁路规范方法和共同作用分析方法的计算结果与试验结果接近,设计方法合理;公路规范方法求得的涵管截面弯矩值相对偏小,设计偏不安全;与规范方法相比,共同作用设计计算方法,可以综合反映涵管结构因素和周围土体性质对结构受力的影响,在理论上更合理。

Investigation on the Structural Design Methods of the Buried Conduit in Highway

The various structural design methods of the buried circular conduit in three sorts of code were investigated,and a new one with consideration of the soilconduit interaction was proposed in this paper.Comparisons of the calculations with laboratory test results and engineering condition surveys indicated that by the new method,U.S.A Code and Railway Code,the maximum calculation bending moments(b.f.)of conduit had good agreement with that of tests, and the methods were relatively reasonable.By the Highway Code design method,the calculation b.f.s were smaller than test results,and the designs were unconservative relatively.As compared with the methods used currently of structural design methods of conduit,the method considering the soilconduit interaction can reflect the influences on the mechanical performances of structural properties and the surrounding soil,and is more reasonable in theory.