科研之友
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摘要
As new technology in anti-slide structures, cantilever double-row piles are usually applied to stabilize large-scale landslides. However, there are rare literatures specific for the design of double-row anti-sliding piles. This paper presents a new procedure for the analysis of double-row piles. The heads of double-row anti-sliding piles are usually free, without cap beams, and the soil between the rear row and front row piles has an important role in the distribution of landslide thrust. Base on the structure mechanism of double-row piles, the back row piles are assumed to be beams on elastic foundation and the front row piles can be treated as common single-row piles. By applying transfer coefficient method, the thrust force acting on the back-row piles is obtained. A rectangular distributed earth pressure is assumed on the back-row pile segment in the sliding layer. The analytic solution of bending moments and shear forces on the leading-row piles and the back-row ones are derived. The bending moment distribution of leading-row piles is similar to that of single-row piles. The theoretical calculation results are in good agreement with the moments measured by tensile strain gauges. It is concluded that the soils between pile rows have a significant influence on the shearing law of the sliding thrust force in the double-row piled slope. The soil pressures between pile rows should be taken into account in the design process. It is also revealed that the maximum bending moments of the leading-row and rear-row piles can be balanced by careful design. Credible results are obtained from the case application and this research can provide a new way to calculate the double-row stabilizing piles.
- 出版日期2014
