Hsin-Yu Shan

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Hydraulic barrier layer is the major component in the cover system of a modern landfill. The primary function of the barrier is to limit the amount of water infiltration. Another important function is to minimize the emission of landfill gas. In recent years, geosynthetic clay liners (GCLs) have been used in landfill covers as hydraulic barrier layer.(More)
In traditional foundation design, the settlement of unsaturated soil is usually treated as instantaneous elastic compression and is sometimes ignored. However, when investigating the land subsidence of coastal area of Taiwan, the deformation of unsaturated soils can not be overlooked. The subsidence is the result of excessive pumping of ground water which(More)
There are several test methods available for studying the behavior of geotextile/soil filtration systems. However, there has not been a consensus on which one of these methods should be the most appropriate. In this research, gradient ratio (GR) tests and hydraulic conductivity (HCR) tests were performed to evaluate the effects of boundary conditions on the(More)
The engineering properties of geosynthetic clay liners (GCLs) are closely related to the chemistry of pore liquid. For applications in lining systems or cover systems of landfills, covers for remediation sites, and secondary containment systems, GCLs are likely to be permeated by more than one type of liquid. In this study, GCL specimens were hydrated and(More)
This paper introduces a 3-year eLearning program for teachers on water environment education co-sponsored by the Ministry of Education, the Environmental Protection Agency, and the Water Resources Agency for the school teachers to disseminate the core knowledge on water environment to facilitate nationwide water education. This is the most extensive(More)
The effect of a gravel subgrade on the hydraulic performance of GCLs is investigated. Laboratory test results show that the GCL specimens exhibit significant variation in thickness when compressed against gravel. The maximum and minimum thicknesses of the specimen were about 20 and 3mm, respectively, after consolidation by an effective stress up to 138 kPa.(More)
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