珊瑚礁砂地质条件下振冲碎石桩试桩施工研究  

Study on Pile Test Construction of Vibro-replacement Gravel Pile Under Geological Conditions of Coral Reef Sand

作　　者：卢普伟[1] 徐雄 黄邦 陈锐清 LU Puwei;XU Xiong;HUANG Bang;CHEN Ruiqing(The Second Engineering Company of CCCC Fourth Harbor Engineering Co.,Ltd.,Guangzhou,Guangdong 510230,China)

机构地区：[1]中交四航局第二工程有限公司

出　　处：《施工技术》2019年第23期117-121,共5页Construction Technology

摘　　要：在钙质珊瑚礁砂地质条件下采用碎石桩进行地基加固,国内外工程案例很少。为依托工程后续碎石桩施工确定相关控制参数,积累操作经验,开展振冲碎石桩试桩施工,确定振冲设备的穿透性能及特点,讨论造孔和成桩时振冲器电流与土层的关系,提出了成桩过程中填料量控制方法,通过SPT检测对桩间土的挤密效果进行分析。There are few engineering cases at home and abroad to reinforce the foundation with gravel piles under the geological conditions of calcareous coral reef sand.In order to determine the relevant control parameters and accumulate operation experience in the follow-up construction of gravel pile,the construction test of vibroflotation gravel pile is carried out.The performances and characteristics of vibropunching equipment are determined,the relationship between the current of vibro-impactor and the soil layer in the process of drilling and piling is discussed,The control method of filling quantity in pileforming process is put forward,the compaction effect of soil between piles is analyzed by SPT test.

关 键 词：桩基础 珊瑚礁砂 振冲法 碎石桩 试验 施工技术 

分 类 号：TU753[建筑科学—建筑技术科学]