第一个棱体由黑色金属结构组成，一端对着素混凝土主体。
The first prism consists of a black metal structure that ends on an exposed concrete staple.
喷(素)混凝土或喷钢纤维混凝土支护在隧道中广泛应用，其强度指标是否达到设计要求将直接关系到支护结构的可靠度。
Nowadays more and more shotcrete liner are applied in tunnel. Whether the shotcrete strength accord design strength will be directly responsible for the timbering reliability.
同时，素混凝土垫层对围护墙体变形具有一定的支撑效应，在一定程度上能起到类似结构底板的作用。
In addition, concrete cushion plays critical bracing function on controlling lateral deformation of the retaining wall, which is similar to the reinforcement concrete bottom plate.
同时，素混凝土垫层对围护墙体变形具有一定的支撑效应，在一定程度上能起到类似结构底板的作用。
In addition, concrete cushion plays critical bracing function on controlling lateral deformation of the retaining wall, which is similar to the reinforcement concrete bottom plate.
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