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http://dx.doi.org/10.7843/kgs.2006.22.9.61

Uplift Pressure Removal System in Underground Structure by Utilizing Geocomposite System  

Shin, Eun-Chul (Dept. of Civil & Environmental System Engrg., Univ. of Incheon)
Kim, Jong-In (Dept. of Civil & Environmental System Engrg., Univ. of Incheon)
Park, Jeong-Jun (Dept. of Civil & Environmental System Engrg., Univ. of Incheon)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.9, 2006 , pp. 61-68 More about this Journal
Abstract
Recently the large scale civil engineering projects are being implemented by reclaiming the sea or utilizing seashore and river embankment areas. The reclaimed land and utilized seashore are mostly soft ground that doesn't have sufficient bearing capacity. This soft ground consists of fine-grained soil such as clayey and silty soils or large void soil like peat or loose sand. It has high ground water table and it may cause the failure and crock of building foundation by uplift pressure and ground water leakage. In this study, the permittivity and the transmissivity were evaluated with the applied normal pressure in the laboratory. The laboratory model tests were conducted by utilizing geocomposite drainage system for draining the water out to release the uplift pressure. The soil used in the laboratory drainage test was dredged soil from the reclaimed land where uplift pressure problems can arise in soil condition. Geocomposite drainage system was installed at the bottom of apparatus and dredged soil was layered with compaction. Subsequently the water pressure was supplied from the top of specimen and the quantities of drainage and the pore water pressure were measured at each step water pressure. The results of laboratory measurements were compared with theoretical values. For the evaluation of propriety of laboratory drainage test, 2-D finite elements analysis that can analyze the distribution and the transferring of pore water pressure was conducted and compared with laboratory test results.
Keywords
Drainage test; Geocomposite system; Ground water; Permittivity; Transmissivity; Uplift pressure;
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