基于CPTU的江浙海上风电工程土体压缩模量解译方法  

INTERPRETATION METHOD FOR SOIL COMPRESSION MODULUS OF OFFSHORE WIND POWER PROJECT IN ZHEJIANG AND JIANGSU BASED ON CPTU

作　　者：王宽君 贾志远 沈侃敏 李玉萍 Wang Kuanjun;Jia Zhiyuan;Shen Kanmin;Li Yuping(POWERCHINA Huadong Engineering Corporation Limited,Hangzhou 310014,China;College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China;Zhejiang Engineering Research Center of Marine Geotechnical Investigation Technology and Equipment,Zhejiang Huadong Geotechnical Investigation&Design Institute Corporation Limited,Hangzhou 310014,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,杭州310014 [2]河海大学土木与交通学院,南京210098 [3]浙江华东岩土勘察设计研究院有限公司,海洋岩土工程勘察技术与装备浙江省工程研究中心,杭州310014

出　　处：《太阳能学报》2024年第10期544-553,共10页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(52108356,52101334);浙江省自然科学基金(LQ20E090001);中央高校基本科研业务费(B230201054)。

摘　　要：针对浙江嘉兴和江苏盐城某海上风电工程,开展室内固结试验和孔压静力触探(CPTU)试验,采用线性、指数和对数3种模型建立考虑土体原位有效应力状态压缩模量Es与修正锥尖阻力q_(t)的关系。研究结果显示,考虑原位有效应力的Es与修正锥尖阻力q_(t)的相关性远高于100~200 kPa固结压力段对应的压缩模量E_(s1-2)与q_(t)的相关性,采用线性模型得到的黏性土压缩模量E_(s)与q_(t)之间的关系更加可靠,嘉兴与盐城海域黏性土经验系数α分别为1.820和3.315;两海域砂土的压缩模量E_(s)与q_(t)之间并无明显的相关性,结果显示两海域砂土的压缩模量E_(s)均存在下限值10 MPa。In this paper,based on offshore wind power projects in Zhejiang Jiaxing and Jiangsu Yancheng offshore area,one-dimensional consolidation tests and piezocone penetration tests(CPTU)were carried out.The relationship between the compression modulus Es and the corrected cone tip resistance qt was established by linear,exponential and logarithmic models.It is found that the correlation between Es considering effective in-situ stress and qt is much better than that between compression modulus E_(s1-2)corresponding to the consolidation stress of 100-200 kPa and q_(t).The linear fitting formulae between the compression modulus Es and qt of clayey soil are more reliable,where the empirical coefficientsαof clayey soil in Jiaxing and Yancheng offshore areas are 1.820 and 3.315,respectively.There is no obvious correlation between E_(s)and q_(t)of sand in both offshore areas,the results show that the lower limit of Es of sand in both offshore areas are 10 MPa.

关 键 词：海上风电场 岩土工程 土体 孔压静力触探 压缩模量 

分 类 号：TV221.2[水利工程—水工结构工程]