| The application of micro-piles have been used not only to withstand vertical load, but also to withstand lateral load. It is rare of Micro-piles for the domestic application in the slope engineering research. Although there have been numerous practical applications engineering examples, and achieved good results and economic benefits, but the theory is very scarce.(1) This paper summarizes the development of micro-piles in and abroad, describes the control measures of the slope failure prevention, anti-sliding mechanism, features and advantages of micro-piles. The basic assumptions of composite structure is proposed whose roof occurs only rigid movement. The basic structure of single pile and micro-pile composite structure and the layout of the slope reinforcement is combined. This paper introduces the force model and the main calculation methods of landslide thrust in side slope remediation programes.(2) As an example to the 3×3 micro-pile composite structure, the internal force calculation method of micro-pile composite structure with rigid roof is derived, and the design theory and method of composite structure is summarized. For different types of slope,"K"or"m"method is used for the calculation of internal force. Numerical analysis is used to analysis the anti-slide ability, pile deformation and the internal force distribution of micro-pile composite structure to compare and analysis the theory of internal force calculation.(3) According to the laboratory study, the effectiveness of anti-slide,and the displacement discipline and roof deformation discipline of the micro-pile composite structure is reseached.This paper researchs the internal force distribution of pile, and analysis the experimental data. This paper provides a basis for the theory and method of calculation of the micro-pile composite structure in engineering programs.(4) The theory and key points of design for the micro-pile composite structure with rigid roof is conclused. |
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