A Case Study of Effect of Horizontal Drains on Rainfall-Induced Landslide

Lin Tang; Xiao Wu Tang; Wei Liu

doi:10.4028/www.scientific.net/AMR.250-253.1834

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Strategy on Improving Lateral Driving Stability of the Automobiles Passing by the Vicinity of A-Shaped Pylon of Zhengxin Yellow River Highway-Railway Bridge in Cross Wind
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A Case Study of Effect of Horizontal Drains on Rainfall-Induced Landslide
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Uncertainty of One-Dimensional Consolidation of Multi-Layered Soft Clay Soils
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Study on Physical-Mechanical Properties of Xiamen Coast Silt
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Fractal Approach on Quantitative Analysis of Micro Pore Structure of Isotropic Consolidated Clay
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Detection of Groundwater Aquifer Using Resistivity Imaging Profiling at Beriah Landfill Site, Perak, Malaysia
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 250-253A Case Study of Effect of Horizontal Drains on...

A Case Study of Effect of Horizontal Drains on Rainfall-Induced Landslide

Abstract:

Rainfall-induced landslides are of frequent occurrence in the south of China. One of the most effective methods to stabilize landslides is to lower the groundwater table by installing horizontal drain. A shallow landslide caused by typhoon Morakot happened along Shangyu - Sanmen Expressway in Zhejiang. Horizontal drains were installed and served as an important part of the slope stabilization scheme. The relationship among rainfall intensity, groundwater level, and slope stability was indicated by field monitoring data. Using software GeoStudio, the stability states of the original slope under rainfall are simulated, based on Fredlund’s Unsaturated Soil Strength Theory. After the rain ceases, the draining processes of the original slope and the slope with horizontal drains are compared. It is obvious that the factor of safety recovers rapidly in the slope with drains. The simulated discharge rate of drain and slope surface, and the change of groundwater table also prove the benefits of the drains, which agree well with the field monitoring data.