聚苯乙烯泡沫板铺设高度对涵洞的减荷影响

Effect of buried depth of expanded polystyrene board on load reduction of high fill culverts

针对聚苯乙烯泡沫板在减小高填方涵洞马斯顿效应中的减荷效果,运用弹?塑性力学理论,结合土拱效应与马斯顿效应的产生形式,分析了聚苯乙烯泡沫板减荷的原理和当前改良中的局限与不足。同时,基于聚苯乙烯泡沫板减荷原理,采用有限元软件ABAQUS,建立了不同铺设高度的聚苯乙烯泡沫板减荷模型,并进行了对比分析,得出聚苯乙烯泡沫板铺设高度的较优布置方式。该结果可为实际工程应用提供指导。

In order to study the load reduction effect of expanded polystyrene(EPS)foam board of Marston effect in high fill culvert,the principle of load reduction of polystyrene foam board and the limitation of current improvement are analyzed by utilizing the theory of elastoplastic mechanics,soil arching effect and the form of Marston effect.Based on the principle of the load reduction effect of expanded polystyrene foam board,the ABAQUS model was used to establish the load reduction model of expanded polystyrene foam with different laying heights.The optimal expanded polystyrene foam laying height is obtained by the comparison and analysis of the calculated results.The results can provide guidance for practical engineering application.