DISTRIBUTED DETECTION OF DEFORMATION AND BEARING MECHANISM ON BORED PILE UNDER HORIZONTAL LOAD
YANG Jianping1，PIAO Chunde2，3，CHANG Hongfei1，LI Ting3
(1. School of Mechanics and Civil Engineering，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China；2. Resources and Geosciences College，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China；3. State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining and Technology，
Xuzhou，Jiangsu 221116，China)
Abstract：In order to explore the mechanism of pile-soil interaction under horizontal load，this paper studies the deformation of the bored pile under horizontal load by pre-installing sensing fibers in the pile body. The formula of the pile deflection and moment is derived based on BOTDR technology，and the pile-soil interaction of the pile in Inner Mongolia in China under horizontal load is analyzed by using ANSYS software. The results show that the deformation of the bored pile under horizontal load is distributed in the range of 6 m underground. With the increase of the horizontal load，the pile body moment rises nonlinearly and the maximum point of moment transfers gradually to the deep part. As the load increases，the bending curve of pile-soil contact force shifts from the tendency of nonlinearity to the tendency of increase and then decrease，and its maximum inflection point fits well with the point of the maximum moments. Through comparing the theoretical calculation values of pile deflection with the measured values and the numerical simulations，it can be found that，due to the effect of the stiffness of pile，the deflection values of numerical simulations are relatively higher，while the theoretical calculation values are basically in accord with the measured values，which proves that the pile deformation formula based on BOTDR is practical and reliable.
MATLOCK H. Correlations for design of laterally loaded piles in soft clay[C]// Proceedings of the 2nd Annual Offshore Technology Conference. Houston：[s.n.]，1970：577-594.
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2014, Vol. 33 
