Abstract

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Title:: Static and Dynamic Soil Arching Effect of Pile-supported Embankments

Author(s):: CHEN Ren-peng; LIU Qi-wei; JIANG Zheng-hui; Key Laboratory of Building Safety and Energy Efficiency of Ministry of Education, Hunan University

Keywords:: pile-supported embankment; soil arching effect; pile efficacy; settlement control; equal-settlement plane

Abstract:: In order to understand the characteristics of soil arching effect deeply,on the basis of summarizing equal settlement plane and pile efficacy in the soil arching effects of pilesupported embankments, the several calculation methods on pile efficacy were compared. The transfer mechanism of dynamic load in pile-supported embankment was elaborated, and the influence of degree of soil arching effect on dynamics stress was analyzed. Finally, the method for calculating the dynamic stress in pile-supported embankments was given. The results show that the equal settlement plane and soil arch height can be normalized description with critical filling height, and the critical filling height is linear with the spacing between piles.The values of pile efficacy are related to the working conditions,and the calculation methods have their applicable conditions.The calculation method of Chen is fitting with measured value.The dynamic loads are also affected by the soil arching effects, and the soil arching effect appears strengthened firstly and then weakened with the increase of cycle number of dynamic loads.