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| Discussion on Bearing Capacity of Crushed Stone Composite Ground |
| XIAO Xing-qiu |
| China Railway Eryuan Engineering Group Co. Ltd,Chengdu, Sichuan 610031 China |
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Abstract Research purposes：After analyzing the shortcoming of the methods for calculating the bearing capacity of the crushed stone pile composite foundation, this paper points out the incompleteness of stress ratio of pile and soil introduced into the calculation formula for the bearing capacity and the effect of increase of the soil strength on the bearing capacity of composite foundation. Base on these, the discussion is on the calculation methods for the initial bearing capacity and dynamic bearing capacity during pre-loading of composite foundation to seek the dynamic calculation formula for the bearing capacity of composite foundation.
Research conclusions：This bearing capacity of granular material pile depends on the strength of soil between the piles and they are variable. So the bearing capacity of crushed stone pile composite foundation can be expressed as the function of soil's shear strength. The bearing capacity of crushed stone composite foundation is a dynamic variable, increasing with the increase of the soil strength between the piles. The calculation formula for the dynamic bearing capacity of composite foundation is presented for construction with it.
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Received: 26 August 2009
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2010, Vol. 27 
