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Deep Soil Mixing Columns as Retaining Structure

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ljmtidilgw 发表于 2013-7-20 20:46:55 | 显示全部楼层 |阅读模式
本帖最后由 三T上人 于 2015-11-8 21:43 编辑 <br /><br />DEEP SOIL MIXING COLUMNS AS RETAINING STRUCTURE
K. K. Soh1,a, W. K. Leong1,b, L. Yeo1,c, S. H. Chew2, K. W. Leong3,d and Z. W. He3,e
2National University of Singapore, Singapore. E-mail: ceecsh@nus.edu.sg
3Keller Foundations (SE Asia) Private Limited, Singapore.
As part of the new water front town in Punggol, Singapore, a 4.2 km long waterway has been constructed to connect two existing river reservoirs. The waterway is about 4 m deep, with a varying width of 24 m to 80 m. The geological history record shows that some branches of ancient streams and rivers run through part of the site. Grid pattern of Deep Soil Mixing (DSM) columns extend beneath the waterway and connect to the opposite bank was proposed when approximately 6 m of very soft marine clay with qc < 0.25 MPa was identified by additional Cone Penetration
Test (CPT) along the CH3790-CH3900 (~110 m). This proposed configuration not only fully utilise the advantage of compressive strength but also isolates the development of tensile stress at the DSM columns and serves as retaining structure to the design cut-slope. 3D Finite Element (FE) Analysis is adopted to discern and study the interaction of DSM columns with the confined very soft marine clay during excavation. The analysis shows acceptable shear and isolated tensile stresses developed within the longitudinal DSM columns. This grid pattern of DSM columns
with 0.44 m overlapped width will act as a retaining structure. On site, the DSM columns performed satisfactorily with only a maximum 6 mm deflection registered by the inclinometers. No sign of distress was observed on the slopes and surfaces of the DSM columns as well.

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鲜花(279) 鸡蛋(4)
 楼主| ljmtidilgw 发表于 2013-7-20 20:47:59 | 显示全部楼层
本帖最后由 三T上人 于 2015-11-8 21:43 编辑 <br /><br />1/1

澳门葡京娱|乐|城:国际品牌氵顶_级_信_誉

253 - Deep Soil Mixing Columns as Retaining Structure.pdf

1.57 MB, 下载次数: 48, 下载积分: 金币 -2 金币

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fulinsg 发表于 2013-7-21 10:55:27 | 显示全部楼层
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zong2006 发表于 2013-8-5 14:54:21 | 显示全部楼层
本帖最后由 三T上人 于 2015-11-8 21:43 编辑 <br /><br />good stuff, thanks

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