玄武岩纤维及其复合纤维对隧道支护影响分析

Research on the influence of basalt fiber and basalt composite fiber on tunnel support

玄武岩纤维被认为是一种具备环保特性的新型无机材料,其掺入混凝土中可有效提升混凝土的强度、韧性等性能。从不同玄武岩纤维和钢纤维掺入量的角度出发,利用数值模拟研究了普通混凝土、玄武岩纤维混凝土以及复合纤维混凝土对隧道支护稳定性的影响。结果显示,采用玄武岩纤维和复合纤维喷射混凝土作为衬砌具有较高的强度和韧性,明显优于普通混凝土。此外,与普通混凝土相比,玄武岩纤维混凝土和复合纤维混凝土对应力有明显的约束作用,能有效增强初期衬砌的强度,为隧道的开挖和支护提供更可靠的保障。

Basalt fiber is considered a new type of inorganic material with environmentally friendly properties,and its incorporation into concrete can effectively improve its strength,toughness,and other properties.This study investigates the effects of different dosages of basalt fiber and steel fiber on the stability of tunnel support using numerical simulations,including ordinary concrete,basalt fiber concrete,and composite fiber concrete.The results show that using basalt fiber and composite fiber sprayed concrete as lining has higher strength and toughness,significantly better than ordinary concrete.In addition,compared with ordinary concrete,basalt fiber reinforced concrete and composite fiber reinforced concrete have a significant restraining effect on stress,which can effectively enhance the strength of the initial lining and provide more reliable guarantee for tunnel excavation and support.