Experimental investigations on ultimate bearing capacity of peat stabilized by a group of soil–cement column: a comparative study

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• 作者：Ali Dehghanbanadaki ; Kamarudin Ahmad ; Nazri Ali
• 关键词：Bearing capacity ; Cement column ; Failure patterns ; Peat soils ; Stabilization
• 刊名：Acta Geotechnica
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：11
• 期：2
• 页码：295-307
• 全文大小：1,225 KB
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• 作者单位：Ali Dehghanbanadaki (1)
  Kamarudin Ahmad (1)
  Nazri Ali (1)
  
  1. Department of Civil Engineering, University Technology Malaysia, 81310, Johor Bahru, Johor, Malaysia
  
• 刊物类别：Engineering
• 刊物主题：Continuum Mechanics and Mechanics of Materials
  Geotechnical Engineering
  Soil Science and Conservation
  Granular Media
  Structural Mechanics
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1861-1133

文摘

The aim of this paper was to determine the ultimate vertical bearing capacity of rectangular rigid footings resting on homogeneous peat stabilized by a group of cement deep mixing (CDM) columns. For this purpose, a series of physical modeling tests involving end-bearing and floating CDM columns were performed. Three length/depth ratios of 0.25, 0.5, and 0.75 and three area improvement ratios of 13.1, 19.6, and 26.2 % were considered. Bearing capacity of the footings was studied using different analytical procedures. The results indicated that compared to unimproved peat, the average ultimate bearing capacity (UBC) improvement of floating and end-bearing CDM columns were 60 and 223 %, respectively. The current study found that simple Brom’s method predicted the UBC of the peat stabilized with floating CDM columns with reasonable accuracy, but underestimated the UBC by up to 25 % in the case of end-bearing CDM columns. Published laboratory experiences of stabilizing soft soils using soil–cement columns were also collated in this paper.