Experimental Study on Pile-soil Stress Ratio of the Compos-ite Foundation with Down-hole Dynamic Compaction
LYU Wenlong
LIN Yifeng
FU Qiang
Abstract：By conducting on-site static load tests and pile-soil stress tests on the composite foundation with down-hole dynamic compaction,the average pile top stress,soil stress between piles,pile-soil stress ratio,load sharing ratio,and their variation patterns of the deep dynamic compaction composite foundation in the hole under different loads were obtained.The test results show that:the soil between piles of the deep dynamic compaction composite foundation in the hole bears the main upper load,accounting for about 50%-63%.As the load increases,the proportion of load borne by the soil between piles gradually increases;for the deep dynamic compaction composite foundation in the hole,the pile-soil stress ratio decreases with the increase of load,with a value between 2 and 5;for foundation with cohesive plain soil filling,the bearing capacity of the deep dynamic compaction composite foundation in the hole after treatment can be increased by 220%compared with that before treatment.
Keywords：Down-hole dynamic compactionComposite foundationPile-soil stress ratioSoil stress between pilesFoundation bearing capacityLoad sharing ratio
Publication Date：2024-03-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 119-125 )