Experimental research on end bearing characteristics of rock-socketed pile in reef limestone
LIU Haifeng1，2，ZHU Changqi1，CUI Xiang1，2，MENG Qingshan1，WU Wenjuan1，2
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. University of the Chinese Academy of Sciences，Beijing 100049，China)
In order to serve the pile foundation designs in China-Maldives Friendship Bridge construction project, and investigate the end bearing characteristics of rock-socketedpile in coral reef limestone, indoor mechanical tests and end bearing pile model tests were carried out on the reef limestone cores drilling from the bridge foundation position. By these means，the strength andfailure law of reef limestone samples under three direction compression in the pile end are obtained. Experiment results show that the pileend stressare obviously higher than the uniaxial compression strength，and greatly influenced by specimenstructure and strength. In different structure specimens，the pile end stress curve arein different growth trendwith pile top displacement. In the processing of test results, we determined the vertical compressive ultimate bearing capacity of single pile in different structure specimens according to the technical code for testing of building foundation piles(JGJ106—2014).Considering the influence of diameterscale between actual pile and model test，the design reference of ultimate end bearing valuein different structure types of reef limestone are determined after reduction associate within-situ pile test result.
刘海峰1，2，朱长歧1，崔 翔1，2，孟庆山1，吴文娟1，2. 礁灰岩嵌岩桩的端承特性试验研究[J]. 岩石力学与工程学报, 2018, 37(S2): 4348-4355.
LIU Haifeng1，2，ZHU Changqi1，CUI Xiang1，2，MENG Qingshan1，WU Wenjuan1，2. Experimental research on end bearing characteristics of rock-socketed pile in reef limestone. , 2018, 37(S2): 4348-4355.
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2018, Vol. 37 
