CPC E21D 11/10 (2013.01) [E21D 11/107 (2013.01); E21D 11/152 (2013.01); E21D 11/18 (2013.01)] | 13 Claims |
1. A composite support system based on a steel-concrete support and a shotcrete arch structure, comprising an anchor mesh layer provided on an inner wall of a roadway, wherein a flexible compressible layer is provided on an outer side of the anchor mesh layer;
a waterproof layer is provided on an outer side of the flexible compressible layer to form a yielding and waterproof layer to adapt to deformation of a surrounding rock;
a support frame is provided on the outer side of the flexible compressible layer;
reinforcement meshes are respectively arranged on an inner side and an outer side of the support frame;
the support frame and the reinforcement meshes form a framework to construct the shotcrete arch structure;
the reinforcement meshes and the support frame are embedded into the shotcrete arch structure to form a rigid layer;
a deformation space is reserved between the rigid layer and the anchor mesh layer; and
when the anchor mesh layer and the flexible compressible layer are compressed, the anchor mesh layer and the flexible compressible layer are deformed toward the reserved deformation space for a yielding purpose and then contact with the rigid layer to form a coupling support;
the reserved deformation space comprises a support member provided between the flexible compressible layer and the rigid layer; and two opposite sides of the support member are respectively butted with the flexible compressible layer and the rigid layer; and
when a pressure on the roadway is too large, the flexible compressible layer is compressed, deformed, and thinned due to a stress of the surrounding rock; the flexible compressible layer is plastic to avoid a structural layer damage, and to relieve the pressure; and the pressure is transferred to the rigid layer of the support frame by yielding to the pressure before resisting.
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