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http://dx.doi.org/10.7843/kgs.2006.22.12.77

Model Tests on Ground Deformation during Trench Excavation for Diaphragm Walls  

Hong, Won-Pyo (Dept. of Civil & Environmental Engrg., Chung-Ang Univ.)
Lee, Moon-Ku (Dept. of Civil Engrg., Chung-Ang Univ.)
Lee, Jae-Ho (Disaster Prevention Research Institute, CAU)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.12, 2006 , pp. 77-88 More about this Journal
Abstract
A series of model tests were performed to investigate the ground deformation during trench excavation for diaphragm walls. An apparatus was manufactured to observe the failure pattern of a slurry-supported trench in sandy ground. Ground deformations including settlement and lateral displacement of the surrounding ground adjacent to the trench were carefully monitored during excavation. Experimental observations indicated that the settlement of the adjacent ground increased with closing to the trench. Especially, the considerable settlement occurred at the distance which was equal to 40% of the excavation depth. And, the higher settlement was obtained when the relative density of ground was looser and the ground water table was higher. Also, the lateral wall face of excavated trench was bulged with lowering the slurry level In stages and then the upper part of trench failed finally. The envelope of ground surface settlement could be represented as a hyperbolic line and the measured settlement was smaller than those predicted by Clough and O'Rourke (1990).
Keywords
Diaphragm wall; Excavation; Ground water level; Model test; Settlement; Trench;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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