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Volume 33 Issue zk1
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HE Wei, FU Hong-yuan. Design of horizontal reinforcement as prevention of sinkhole hazards for roadbed engineering in kartst areas[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(zk1): 358-363.
Citation: HE Wei, FU Hong-yuan. Design of horizontal reinforcement as prevention of sinkhole hazards for roadbed engineering in kartst areas[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(zk1): 358-363.
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Design of horizontal reinforcement as prevention of sinkhole hazards for roadbed engineering in kartst areas

  • School of Civil & Architecture, Changsha University of Science & Technology, Changsha 410114, China

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  • Received Date: April 26, 2011
  • Published Date: November 30, 2011
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    • Abstract
  • It is often necessary to implement geosynthetics to reduce risk of sinkhole for roadbed engineering in karst areas, while the theory for design and analysis is far behind the engineering practices. Firstly, the load on the reinforcement is analyzed, and the Terzaghi's arch theory is introduced to calculate the load above sinkhole. The reinforcement is considered composing of three portions which are portion above sinkhole, changeover portion and anchored portion adjacent to sinikhole according to various loading transfer behaviors. The relationship between tension and displacement at the edge of cavity is deduced for the portion above sinkhole. The tension loss is obtained by introducing the Coulumb's law for the changeover portion. The anchored portion is divided into elastic and plastic sections to be solved, and the analytical solution and length of plastic section are deduced by taking the anchored portion as finite or infinite length. Then, a method is proposed to solve the problem by cross of curves. The proposed method is applied in analyzing pull-out tests and full-scale tests. The results shows that the calculated results agree with the measured ones.
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    • References (12)
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    康彦仁 , 项式均 , 陈 健 , 等 . 中国南方岩溶塌陷 [M]. 广西 : 广西科学技术出版社 , 1990. (KANG Yan-ren, XIANG Shi-jun, CHEN Jian. Karst collapse of south China[M]. Guangxi: Guangxi Science and Technology Press, 1990. (in Chinese))
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    BONAPARTE R, BERG R R. The use of geosynthetics to support roadways over sinkhole prone areas[C]// Proceedings of the 2nd multidisciplinary conference on sinkholes and the environmental impacts of karst, Orlando, 1987: 437 – 450.
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    Ennio Marques Palmeira. Soil-geosynthetic interaction: Modelling and analysis[J]. Geotextiles and Geomembranes, 2009, 27 : 368 – 390.
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    PASCAL Villard, LAURENT Briancon. Design of Geosynthetic Reinforcements for Platforms subjected to Localized Sinkholes[J]. Canadian Geotechnical Journal, 45 (8): 196 – 209.
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    KARL Terzaghi. Theoretical soil mechanics[M]. New York: John Wiley and Sons, 1943.
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    PALMEIRA E M. The study of soil-reinforcement interaction by means of large scale laboratory tests[D]. United Kingdom: University of Oxford, 1987.
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