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

Xiao Zhang, Hao Wang (), Zhiwei Gao, Ke Xiang, Qian Zhai, Alfrendo Satyanaga and Yuan Shen Chua
Additional contact information
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

Sustainability, 2023, vol. 15, issue 19, 1-16

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.

Keywords: horizontal drain; rainfall; drainage design optimization; numerical modeling (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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