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A New Thought of Appraisal on Anchoring Effect of the Cement Mixed Pile Composite Foundation

SHI Gang1,2,GAO Guang-yun1,2,ZHANG Jun3(1.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,P.R.China; 2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University,Shanghai 200092,P.R.China;3.School of Bridge and Structure Engineering,Changsha University of Science and Technology,Changsha 410076,P.R.China)  
In this paper,a new thought was given to appraise improvement effect of composite foundation by use of average velocity of Rayleigh wave of pile and soil,based on the principle of calculating the bearing capacity of cement mixed pile composite foundation by means of stress ratio of pile and soil.Moreover,feasibility of this thought is validated by using a numerical analysis method.
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