钢板-钢纤维混凝土检查井盖试验研究

Experimental Research on Steel Plate-steel Fiber Reinforced Concrete Manhole Cover

基于高性能钢纤维混凝土复合材料检查井盖及钢-混凝土组合结构,提出了钢板-钢纤维混凝土井盖。制作了2个阶梯形纯钢纤维混凝土井盖试件、1个部分包裹钢板的平板式钢板-钢纤维混凝土井盖试件和2个全包裹钢的阶梯形钢板-钢纤维混凝土井盖试件,并进行了标准静载试验。结果表明,全包裹钢板-钢纤维混凝土组合结构形式的井盖试件承载力高、竖向挠度较小,且在加载至超过400k N的过程中试件基本处于弹性范围内,能够满足GB26573—2011《钢纤维混凝土检查井盖》中D级井盖的承载力要求。

Based on high performance steel fiber reinforced concrete composite material manhole cover and steel- concrete composite structure, the steel plate-steel fiber reinforced concrete manhole cover is designed. The standard static load test of the 2 stepped pure steel fiber reinforced concrete cover specimens, one partially encased steel flatbed-steel fiber reinforced concrete cover specimen and 2 full wrap steel ladder-shaped steel plate-steel fiber reinforced concrete cover are carried out. The results show that the load-carrying capacity of full wrap steel plate-steel fiber concrete manhole cover is high and its vertical deflection is small, and the specimen is elastic stage within the range of the load to the process of more than 400kN, which can meet the bearing capacity requirements of D level covers of GB 26573--2011 ＂steel fiber concrete manhole cover＂.