自调式升降井盖与传统井盖力学性能对比分析

Comparative Analysis of Mechanical Properties of the Self-adjustable Lifting Manhole Cover and the Rraditional One

采用有限元分析方法,考虑3种荷载工况:①单车轮作用在井盖中部;②单车轮作用在井盖与路面交界处;③单车轮作用在距井盖与路面交界x米处,对沥青混凝土路面新型自调式升降井盖与传统井盖的受力特点和竖向变形进行了力学性能对比分析,由分析结果可知,3种荷载工况下,自调式升降井盖的车轮轴载应力、竖向最大变形均较传统井盖要小,且自调式升降井盖比传统井盖能够更好的与周围路面产生整体协调变形,使得井盖及周边路面的破坏相对减少.研究结果为自调式升降井盖的推广应用提供了理论依据.

Based on finite element analysis, considering three working conditions ： 1 ） single wheel in the mid- dle of the manhole cover, 2） single wheel at the junction of the manhole cover and the road, 3） single wheel x meters distance from the junction of the manhole cover and the road, it carried out the comparisons and anal- ysis of stress and deformation of the new type self-adjustable lifting manhole cover and the traditional manhole cover on asphalt concrete pavement. The result showed that the vertical deformation and the wheel stress of the new type manhole cover are less than the traditional one in the three working conditions, and the new type manhole cover can be better compatibly deformed than the traditional manhole cover, reducing the relative de- struction of the manhole cover and the surrounding road. The research results of this paper provides theory ba- sis for the popularization and application of the self-adjustable lifting manhole cover.