摘要
将钢纤维混凝土用于隧道衬砌可有效减小结构断面面积，提高隧道稳定性，节约成本。为了研究钢纤维混凝土的力学性能和工程特性，在混凝土中加入掺量为0kg／m^3、40kg／m^3、50kg／m^3、80kg／m^3和120kg／m^3的剪切波浪型钢纤维，进行抗压强度和抗拉强度试验，从而得出钢纤维混凝土的最优配合比。试验结果表明剪切波浪型钢纤维掺量达到50kg／m^3时，试件的抗压强度和抗拉强度达到最大值。现场喷射钢纤维混凝土试件比室内浇筑混凝土的抗压强度降低4．5％，劈裂抗拉强度降低8．8％。
The steel fiber reinforced concrete would reduce the cross-section area of the tunnel, improve the stability of the tunnel, reduce workloads and save costs. In order to study the mechanical properties and engineering characteristics of steel fiber reinforced concrete, the shear wave section steel fibers which dosage were 0kg/m^3, 40kg/m^3, 50kg/m^3, 80kg/m^3 and 120kg/m^3 were joined into the concrete. We carried out compressive strength and tensile strength experiment and calculated the optimum mixture ratio of steel fiber reinforced concrete. The results show that when the shear wave section steel fiber content is 50kg/m^3, the compressive strength and tensile strength of the steel fiber reinforced concrete reach maximum. The compressive strength of steel-fiber- reinforced shotcrete is less than that of indoor by 4.5%. The tensile strength of steel-fiber-reinforced shotcrete is less than the one indoor by 8.8%.
基金
河南省教育厅项目（2012112214312494）
关键词
钢纤维混凝土
隧道衬砌
配合比
抗压强度
抗拉强度
Steel Fiber Reinforced Concrete
Tunnel Lining
Optimum Mixture Ratio
Compressive Strength
Tensile Strength
