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Optimal location and effect judgment on drainage tunnels for landslide prevention

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Abstract

An optimal drainage tunnel location determination method for landslide prevention was proposed to solve the existing problems in drainage tunnel construction. Current applications of drainage tunnel systems in China were reviewed and the functions of drainage tunnel were categorized as catchment and interception. Numerical simulations were conducted. The results show that both catchment and interception tunnels have variation of the function in the simulation of monolayer model, which shows the reduction of permeability condition in lower layer. The function of catchment can be observed in the deep slope, while the function of interception is observed near groundwater source. By using the slope safety factor and discharge water amount as the objectives of optimal drainage tunnel location, and pore-water pressure in fixed node and section flux as the judgment for construction quality of adjacent drainage tunnel, the design principle of drainage tunnel was introduced. The K103 Landslide was illustrated as an example to determine the optimal drainage tunnel location. The measured drainage tunnel efficiency was evaluated and compared with that from the numerical analyses based on groundwater data. The results validate the present numerical study.

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Authors and Affiliations

  1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China

    Zhi-lei Wang  (王智磊) & Yue-quan Shang  (尚岳全)

  2. Zhejiang Electric Power Design Institute, Hangzhou, 310012, China

    Zhi-lei Wang  (王智磊)

  3. Department of Ocean Science and Engineering, Zhejiang University, Hangzhou, 310058, China

    Hong-yue Sun  (孙红月)

Authors
  1. Zhi-lei Wang  (王智磊)
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  2. Yue-quan Shang  (尚岳全)
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  3. Hong-yue Sun  (孙红月)
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Corresponding author

Correspondence to Hong-yue Sun  (孙红月).

Additional information

Foundation item: Project(1220BAK10B06) supported by the National “Twelfth Five-Year” Plan for Science & Technology Support Program of China; Project(20100101110026) supported by the PhD Programs Foundation of Ministry of Education of China; Project(2009R50050) supported by the Key Innovation Team Support Fund of Zhejiang Province, China

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Wang, Zl., Shang, Yq. & Sun, Hy. Optimal location and effect judgment on drainage tunnels for landslide prevention. J. Cent. South Univ. 20, 2041–2053 (2013). https://doi.org/10.1007/s11771-013-1706-5

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  • DOI: https://doi.org/10.1007/s11771-013-1706-5

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