Abstract: The excessive weight of precast blocks will seriously affect the efficiency of the workers moving them by hands, which will affect efficiency of the construction of slope protection structure. To study the influence of reducing the weight of precast blocks on the structure, four types of precast arch skeleton slope protection structure models are established by using the ABAQUS finite element software. Namely, V1 is the original type (the arch skeleton is composed of precast blocks A, B, C and D); V2 is the improved type (removing the upper stop of precast block C on the basis of the V1 type), V3-1 is another improved type (trenched and reducing the size of precast blocks A, B and C on the basis of the V2 type, and cutting off and reducing the size of precast block D), V3-2 is the improved type (trenched and reducing the size of precast blocks A, B, C and D on the basis of V2 type), The stress and displacement of key points of each version of the prefabricated arch skeleton slope protection structure model are compared and analyzed. The results show that: V3-1 type is the lightest structure; The stress in the V3-2 structure is the largest, and the rest are V3-1, V1 and V2 in turn; In each type, the stress of precast block C is the largest, followed by precast blocks A and D, and B is the smallest; V1 type has the strongest resistance to the deformation, and V2, V3-2 and v3-1 types decrease in turn.

Key words: Slope Protection Structure, Prefabricated Arch, Numerical Analysis