摘要
Abstract
If free water in the tailings storage dam body is not discharged in time,the phreatic line will be higher than the design level,which may lead to dam failure accidents.For this reason,this paper developed a rectangular seepage-drainage reinforced composite member with circular holes,composed of reinforced drainage boards and filter layers,and obtained various mechanical property indexes through material performance tests.On this basis,with fine-grained tailings as filling soil,pull-out tests and triaxial shear tests were used to study the interface interaction characteristics and reinforcement mechanism between the member and fine-grained tailings under different compaction degrees and vertical loads.The research results show that the new seepage-drainage reinforced composite member has good permeability and tensile strength;the filling compaction degree has a significant impact on the interface strength parameters—as compaction degree increases,the interface pull-out coefficient and cohesion increase rapidly;the member has an obvious restraining effect on the shear dilatancy of fine-grained tailings,and can simultaneously improve the peak strength and residual strength of the soil mass.The research results verify that the new member has a good reinforcement effect,providing a reference for the design of fine-grained tailings storage dams.关键词
尾矿堆积坝/排渗加筋/压实度/拉拔系数/力学性能Key words
Tailings storage dam/Seepage-drainage reinforcement/Compaction degree/Pull-out coefficient/Mechanical properties分类
建筑与水利
