| Geocell is a new type of geosynthetics, and at present it has been applied in every field of civil engineering. Directed against the jump disease at abutment joint in the high-grade highway, this paper puts forward the treatment of wedge-shaped flexible approach slab which is consisted of geocell and, through the indoor modeling, proves the effectiveness of wedge-shaped flexible approach slab in absorbing the subsidence of the fill behind abutments caused by subsidence of foundation. After further making clear the differences of applying the wedge-shaped flexible approach slab in different kinds of soil and using Marc program to numerically simulate the deformation and mechanical properties of the fill behind abutments reinforced by wedge-shaped flexible approach slab, this paper gets the characteristics of plastically deforming area in the fill behind abutments under different conditions of subsidence and in different kinds of soil, and accordingly puts forward the designing optimization scheme of wedge-shaped flexible approach slab. |
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