入海水道深淤段软土地基工程特性研究  

Research on engineering properties of soft soil foundation in deep siltation section of the waterway into the sea

作　　者：占鑫杰[1,2] 张娟 黎昱[4] 杨守华 陈浩[5] ZHAN Xinjie;ZHANG Juan;LI Yu;YANG Shouhua;CHEN Hao(Geotechnical Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China;Jiangsu Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225009,China;Jiangsu Province Engineering Investigation and Research Institute Co.,Ltd.,Yangzhou 225002,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]南京水利科学研究院岩土工程研究所,江苏南京210029 [2]水文水资源与水利工程科学国家重点试验室,江苏南京210029 [3]江苏省水利勘测设计研究院有限公司,江苏扬州225009 [4]江苏省工程勘察研究院有限责任公司,江苏扬州225002 [5]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098

出　　处：《江苏水利》2022年第12期13-17,共5页Jiangsu Water Resources

基　　金：江苏省水利科技项目(2020012)。

摘　　要：入海水道二期工程拟在深淤地基上填筑堤防并建设穿堤建筑物。为深入研究入海水道深淤段软土地基的工程特性,在南堤深淤段布置3个典型断面,对控制堤防稳定和变形的关键土层,综合采用钻孔取土、原位测试和室内试验等手段测试了软土地基的工程特性。试验结果表明:深淤段地基是一种典型的河湖相淤泥质软土,其厚度大,含水率和粘粒含量高,普遍含有粉土和砂土薄层。一期工程堤防堆载后,堤身下方淤泥地基强度提升明显,这对二期工程灌溉总渠侧的稳定是有利因素。针对深淤段地基的工程特性,二期工程深淤段堤防扩建工程,应重点关注堤防、穿堤建筑物的工后沉降和差异沉降等。In the second phase of the water inlet project,it is planned to fill the embankment on the deep silt foundation and construct the building through the embankment.In order to study the engineering properties of soft soil foundation in deep siltation section of the waterway into the sea,three typical sections were arranged in the soft soil section of south embankment.For the critical soil layer controlling stability and deformation of embankment,the engineering properties of soft clay foundation were obtained by means of borehole sampling,in-situ testing and indoor testing.The test results show that the foundation of the deep siltation section is a typical river-lake facies silt soft soil.It has a large thickness,high moisture content and clay content,and generally contains thin layer of silt and sand.After the embankment construction in the first stage project,the strength of the silt foundation under the embankment is significantly improved,which is a favorable factor for the stability of the general canal side of the second stage project.In view of the engineering properties of the foundation in the deep silt section,the embankment expansion project in the second phase should focus on the post-construction settlement and differential settlement.

关 键 词：堤防扩建工程 淤泥地基 工程特性 低扰动试样 沉降 差异沉降 

分 类 号：TU43[建筑科学—岩土工程]