风化岩层中开口钢管桩沉桩性状  

Behavior of driven open steel pipe piles in weathered rock

作　　者：曾华彬 桑登峰[2] 苏世定 胡兴昊[2] ZENG Hua-bin;SANG Deng-feng;SU Shi-ding;HU Xing-hao(The First Engineering Company of CCCC Fourth Harbor Engineering Co.,Ltd.,Guangzhou 510310,China;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou 510230,China)

机构地区：[1]中交四航局第一工程有限公司,广东广州510310 [2]中交四航工程研究院有限公司,广东广州510230

出　　处：《水运工程》2019年第4期193-199,共7页Port & Waterway Engineering

基　　金：广州市珠江科技新星专项(2017100101188;201806010164);广东省交通运输厅科技项目(2016-02-024)

摘　　要：终锤贯入度、桩端持力层和极限承载力是保证基桩施工质量的要素。采用高应变全程动测试桩研究不同壁厚开口钢管桩在珊瑚礁灰岩地质中的沉桩性状,主要包括测试承载力、沉桩贯入度、打桩应力以及桩身传递能量等关键参数,并通过分析480根开口钢管桩的沉桩规律,得出以下结论:基桩持力层应选择强风化珊瑚礁灰岩,终锤判定条件应同时考虑终锤贯入度和入强风化岩深度2个指标。The final set,bearing stratum and ultimate pile capacity of the driven pile are critical for the quality control of piling works.Carrying out the whole high-strain dynamic testing to study the driving behavior of open steel pipe piles with different wall thickness in coral-reef limestone,including significant parameters such as the pile capacity,set,driving stress and energy transfer in pile driving and analyzing the characteristics of 480 driven piles,we draw the conclusion as follows:the bearing stratum shall be highly weathered coral-reef limestone and the final criterion shall be controlled by the final set and embedment depth of piles in the highly weathered rock.

关 键 词：全程动测 开口钢管桩 沉桩性状 终锤判定条件 

分 类 号：U655.544.1[交通运输工程—港口、海岸及近海工程]