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| Discussion of the Design Method for Slope (Landslide) Reinforced by Cable Anchors and Piles |
| JIANG Chu-sheng, ZOU Chuan, HUANG Xian-zhang, LI Qing-hai, SI Wen-ming, XU Ying |
| (China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, China) |
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Abstract Abstract：Research purposes： The prestressed cable anchors and piles are often used in the design of high slope or landslide reinforcement. Cable anchors have become an irreplaceable measure in high slope reinforcement and landslide treatment because their adaptability, with deep active reinforcement, random reinforcement, good flexibility, convenient construction, etc. However, the existing calculation methods and design codes generally only list the calculation formula of a linear sliding surface, without a clear calculation method for the cable anchors and piles combination design. At present, most of the specifications only give calculation method for a single straight (bedding) surface. In practical engineering, the vast majority of sliding surfaces are non linear, and more for the broken line or arc surface. Because there is no formula directly, the designer can not analyze the joint force of anchor pile and slope using reasonable methods. The design works often relies on designers own engineering experience, lacking certain scientific basis. In this paper, the design methods of these measures which are usually used in landslide or high slope reinforcement were discussed. Research conclusions： (1) In this paper, starting with the calculation of slope stability coefficient and residual thrust, according to current specification formula, safety factor of broken line sliding surface and thrust undertaken separately by cable anchors and piles were deduced. (2) Other forms of sliding surface can all be simplified as broken line sliding surface, thus realizing reasonable design.(3) The calculation method proposed in this paper can be applied to railway, highway and other fields.
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Received: 13 November 2017
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2017, Vol. 34 
