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嵌岩桩及较破碎岩石地基灌注桩承载性状探讨 被引量:2

The Study of the Bearing Capacity of the Rock-socketed Pile and Cast-in-situ Pile in Less-fragmentized Rock Pile Foundation
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摘要 完整、较完整岩石地基上的嵌岩桩的理论研究已相对比较完善,然而通过实际工程对嵌岩桩影响因素的研究相对较少。同时,对于嵌入较破碎岩石地基中的桩,规范没有明确的计算方法,相关研究也较少。通过收集的101根嵌岩桩的静载试验资料,根据统计的试验数据对嵌岩桩的侧阻力、端阻力影响因素进行研究,提出一种嵌岩桩的分析模型;结合嵌岩桩传力机理和较破碎岩石的特性探讨较破碎岩石桩基传力机理,并通过对较破碎岩石地基上9组(26根)灌注桩基静载试验结果进行分析,考虑较破碎岩石中的侧阻力影响系数及端阻力影响系数,得到一种适宜较破碎岩石地基桩承载力建议计算公式,可为相似工程提供参考。 The theoretical researches on rock-socketed pile in intact and less-intact rock have been relatively improved,but the researches on the influencing factors of rock-socketed pile by some projects are relatively less.What’s more,there is no clear calculation method and few relevant studies for the pile embedded in the less-fragmentized rock. According to the collected static load test data of 101 rock-socketed pile,the influencing factors about rock-socketed pile on side resistance and end resistance will be studied,and then an analysis model of rocksocketed piles is proposed. Combining rock-socketed pile force mechanism and the characteristic of less-fragmentized rock,less-fragmentized rock pile force transmission mechanism is discussed,static load test results based on the 9 groups( 26 piles) of less-fragmentized rock foundation perfusion pile is analyzed,the side resistance influence coefficient and the end resistance influence coefficient of he less-fragmentized rock is considered,so we can find an appropriate less-fragmentized rock foundation pile bearing capacity calculation formula,which can provide a reference for similar project.
作者 王田龙 黄质宏 帅海乐 杨成 李罡烨 WANG Tianlong;HUANG Zhihong;SHUAI Haile;YANG Cheng;LI Gangye(China Construction Fourth Engineering Division Corp. Ltd., Guangzhou 510000, China;College of Civil Engineering, Guizhou University, Guiyang 550025, China)
出处 《贵州大学学报(自然科学版)》 2019年第5期106-110,共5页 Journal of Guizhou University:Natural Sciences
基金 贵州省科学技术基金项目资助(黔科合SY字[2014]3067号,黔科合J字[2015]2037号) 贵州省土木工程一流学科建设项目资助(QYNYL〔2017〕0013)
关键词 嵌岩桩 承载性状 较破碎 传力机理 桩基础 rock-socketed pile bearing capacity less-fragmentized mechanism pile foundation
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