振冲碎石桩联合堆载预压地基处理工艺在复杂地层中的应用  

Application of vibroflotation gravel pile combined with surcharge preloading foundation treatment technology in complex stratum

作　　者：于健[1] 刘丹忠 林治佳 周广鑫 武卫军 YU Jian;LIU Dan-zhong;LIN Zhi-jia;ZHOU Guang-xin;WU Wei-jun(CCCC Tianjin Port Engineering Institute Co.,Ltd.,Key Laboratory of Port Geotechnical Engineering of the Ministry of Communications,Key Laboratory of Port Geotechnical Engineering of Tianjin,Tianjin 300222,China;Changjiang Wuhan Waterway Engineering Bureau,Wuhan,Hubei 430014,China;Dalian Airport Construction Development Co.,Ltd.,Dalian,Liaoning 116033,China;Shanxi Mechanisation Construction Group Co.,Ltd.,Taiyuan,Shanxi 030012,China)

机构地区：[1]中交天津港湾工程研究院有限公司,港口岩土工程技术交通行业重点实验室,天津市港口岩土工程技术重点实验室,天津300222 [2]长江武汉航道工程局,湖北武汉430014 [3]大连空港建设发展有限公司,辽宁大连116033 [4]山西机械化建设集团有限公司,山西太原030012

出　　处：《中国港湾建设》2022年第1期48-51,共4页China Harbour Engineering

摘　　要：某填海造地工程为离岸人工岛,由开山碎石料直接回填形成。地基情况复杂,上层为碎石层较为松散、孔隙比大,下层的淤泥层为高含水率、高压缩性、高液限的海相沉积土层。为控制场地的工后沉降,开展了振冲碎石桩联合堆载预压地基处理试验,并采用相应的检测手段,验证该施工工艺的可靠性。单桩成桩效果及整个场地的加固效果检测表明该工法取得了理想的地基加固效果,可适用于该类场地的地基处理,也为下一步地基处理的设计、施工积累了宝贵的工程经验。A sea reclamation project is an offshore artificial island,which is directly backfilled with rock fragments,the foundation condition is complex.The upper layer is a loose gravel layer with large void ratio,and lower layer is a marine sedimentary soil layer with high water content,high compressibility and high liquid limit.In order to control the post construction settlement of the site,the foundation treatment test of vibroflotation gravel pile combined with surcharge preloading was carried out,and the reliability of the construction technology was verified by corresponding detection means,the test results of pile forming effect of single pile and the reinforcement effect of the whole site show that this construction method has achieved ideal foundation reinforcement effect,and can be applied to the foundation treatment of this kind of site,which has accumulated valuable experience for the design and construction of foundation treatment in the next step.

关 键 词：振冲碎石桩 堆载预压 桩身密实度 地基沉降 动力触探试验 标准贯入试验 

分 类 号：U655.4[交通运输工程—港口、海岸及近海工程] TU472.31[交通运输工程—船舶与海洋工程]