Analysis of behavior of stone columns and lime columns

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Abstract

The efficiency of end bearing stone columns and end bearing lime columns in reducing the settlement of a foundation system is examined in this paper. The foundation system is assumed to consist of a large number of regularly spaced stone columns of equal length installed in a weak soil layer and supporting a rigid mat. The analysis examines the influence of such factors as the column spacing, the weak soil properties, properties of the granular medium used in constructing the column, the in situ stresses caused by the installation technique, the depth of the bedrock relative to the tip of the columns and the magnitude of the load carried by the supported raft foundation (expressed as a uniformly distributed load, UDL). This paper is concluded by presenting a number of charts that may be used in the analysis and design of such a foundation scheme.

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