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http://dx.doi.org/10.12652/Ksce.2010.30.2C.077

Effects of DCM Column Properties in Softground on Stabilities of Underground Roadways  

Ahn, Tae-Bong (우송대학교 철도건설환경공학과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.2C, 2010 , pp. 77-84 More about this Journal
Abstract
In planning underground roadway foundation on soft ground, deep cement mixing method (DCM) is employed. The proper mixing ratio using batch test and replacement rates that meet strength criteria are used for deep cement mixing column. Stiffness ratio and distance between deep cement mixing columns (C.T.C) are varied to find out influences on stress, displacement, and differential settlement. The replacement ratios that meet settlement criteria are 10~35%. As stiffness varies, stress reaches at 769.kPa that exceed criteria due to stress concentration when stiffness ratio difference is over 30. Also, when C.T.C is 5 m, stress spreads to soils, so C.T.C need to be considered carefully. The vertical displacement is 0.6~1.56 cm, and angular distortion is 1/909~1/510.
Keywords
floating foundation; deep mixing method; soft ground; stiffness ratio;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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