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Evaluation of the Performance of the Horizontal Drain in Drainage of the Infiltrated Water from Slope Soil under Rainfall Conditions

Author

Listed:
  • Xiao Zhang

    (College of Information Engineering, Xizang Minzu University, Xianyang 712082, China)

  • Hao Wang

    (College of Information Engineering, Xizang Minzu University, Xianyang 712082, China)

  • Zhiwei Gao

    (College of Information Engineering, Xizang Minzu University, Xianyang 712082, China)

  • Ke Xiang

    (Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China)

  • Qian Zhai

    (Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China)

  • Alfrendo Satyanaga

    (Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave., 53, Nur-Sultan 010000, Kazakhstan)

  • Yuan Shen Chua

    (Hocklim Engineering Pte Ltd., Singapore 659530, Singapore)

Abstract

It is known that rainwater infiltration is crucial for rainfall-induced slope failure because the infiltrated water can significantly weaken the shear strength of unsaturated soil. Horizontal drains are commonly used to provide appropriate drainage for the rainwater that percolates out of a slope. However, the effects of the length and location of the subsoil pipe on the performance of horizontal drains have not been extensively investigated. In this paper, a parametric analysis by using a numerical model was adopted to investigate the distribution of pore-water pressure in a slope. The results reveal that an inclination angle of 10–15 degrees and strategic placement at the slope toe and mid-slope provide optimal drainage performance, as compared to the effect of pipe length. Multi-layers of horizontal drain (based on 10 m length) are recommended for slopes with a height of more than 15 m.

Suggested Citation

  • Xiao Zhang & Hao Wang & Zhiwei Gao & Ke Xiang & Qian Zhai & Alfrendo Satyanaga & Yuan Shen Chua, 2023. "Evaluation of the Performance of the Horizontal Drain in Drainage of the Infiltrated Water from Slope Soil under Rainfall Conditions," Sustainability, MDPI, vol. 15(19), pages 1-16, September.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:19:p:14163-:d:1247311
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    Cited by:

    1. Daniel Batista Santos & Patrícia Figuereido de Sousa & André Luís Brasil Cavalcante, 2024. "Analytical Modeling of Unsaturated Soil Shear Strength during Water Infiltration for Different Initial Void Ratios," Sustainability, MDPI, vol. 16(4), pages 1-20, February.

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