Structural Optimization and Engineering Application of"Anti-sliding Shed Tunnel"
The"Anti-sliding shed Tunnel"is a frame structure with slope support function.In order to reveal the force mechanism and optimize the structural force,this paper firstly analyzed the force model of structural and give the numerical model establishment method;then using the finite element numerical simulation of different structural parameters and structural type,we used the comparative a-nalysis of structural displacement and bending moment to derive its structural;Finally,through practi-cal engineering application,described the effectiveness of the support and prospects for the applica-tion.The results show that:the span design of"anti-sliding shed tunnel"should be as small as possi-ble;the height span ratio of 0.4～0.8 is reasonable.Piles can be embedded to a depth of 1/2 the length of the cantilever.The foundation support stiffness is not sensitive to the structural force.The flexural stiffness ratio of pile and beam should be 1.5～2.The force of multi-layer structure is better than that of single-layer structure,and the force of arch type frame is better than that of rectangular frame structure.According to the application of typical projects,the"anti-sliding shed tunnel"can provide large structural rigidity to inhibit the deformation of ultra-high bedding slope,thus realizing the support of such slope.
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