Evaluation of the Performance of the Horizontal Drain in Drainage of the Infiltrated Water from Slope Soil under Rainfall Conditions
Zhang X. Wang H. Gao Z. Xiang K. Zhai Q. Satyanaga A. Chua Y.S.
October 2023Multidisciplinary Digital Publishing Institute (MDPI)
Sustainability (Switzerland)
2023#15Issue 19
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.
drainage design optimization , horizontal drain , numerical modeling , rainfall
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College of Information Engineering, Xizang Minzu University, Xianyang, 712082, China
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, 210096, China
Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave., 53, Nur-Sultan, 010000, Kazakhstan
Hocklim Engineering Pte Ltd, Singapore, 659530, Singapore
College of Information Engineering
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education
Department of Civil and Environmental Engineering
Hocklim Engineering Pte Ltd
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