Abstract
Frame protection is a commonly used solution to maintain the shallow stability of soil slope under rainfall seepage. Currently, the frame structure's design is empirical, and its theoretical analysis method considering the influence of seepage is scarce. Based on the instability model of the infinite slope, the shallow stability calculation model of soil slope under the rectangular frame protection is established in this paper. The calculation results show that it is beneficial to maintain the shallow slope stability by reducing the skeleton spacing and increasing the cross-sectional size of the frame structure. Also, geometric parameters' sensitivity analysis of the frame structure is carried out based on the orthogonal experimental design methods. Therein, an optimal scheme evaluation function was constructed to balance the relationship between the safety factor and the construction material consumption. The calculation model and results included in this paper can guide the design of the rectangular frame protection to soil slope under rainfall seepage.
Highlights
Frame protection is a commonly used solution to maintain the shallow stability of soil slope under rainfall seepage
The material used for the frame protection structure is mortar masonry rubble or plain concrete, and the frame structure used on weathered rock slopes is composed of steel frame and concrete, and anchor rod is commonly punched at the frame nodes
The theoretical analysis method for the protection structure design considering the influence of rainfall seepage is scarce, especially for the influence of the frame structure’s geometric parameters on the shallow slope stability
Summary
Frame protection is a commonly used solution to maintain the shallow stability of soil slope under rainfall seepage. The frame protection structure of the subgrade soil slope is still based on empirical design. The theoretical analysis method for the protection structure design considering the influence of rainfall seepage is scarce, especially for the influence of the frame structure’s geometric parameters on the shallow slope stability.
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