大港油田埕海海洋土动剪切模量与阻尼比试验研究  

Experimental study on dynamic shear modulus and damping ratio of Chenghai marine soil in Dagang Oilfield

作　　者：祁磊 边锋[3] 姚志广 邓海峰 许浩 李春 QI Lei;BIAN Feng;YAO Zhiguang;DENG Haifeng;XU Hao;LI Chun(CNPC Engineering Technology Reasearch Co.,Ltd.,Tianjin 300451,China;CNPC Key Laboratory of Offshore Engineering,Tianjin 300451,China;No.4 Oil Production Plant of Dagang Oilfield,Tianjin 300283,China)

机构地区：[1]中国石油集团工程技术研究有限公司,天津300451 [2]中国石油天然气集团海洋工程重点实验室,天津300451 [3]大港油田第四采油厂,天津300283

出　　处：《石油工程建设》2024年第2期17-20,65,共5页Petroleum Engineering Construction

摘　　要：大港油田埕海区块是我国渤海湾海洋油气的重要产区,位于渤海湾西部沿海,属于地震高发区,因此,在该海域进行海洋工程设计建造时,必须根据工程场地的动剪切模量和阻尼比等动力学参数进行地震安全性评价。采用共振柱试验仪对大港埕海海域0~120 m不同深度的海洋土土样进行土体动参数测试与研究。研究发现埕海海洋土动剪切模量随着动剪应变的增大而降低、阻尼比随着动剪应变的增大而增大,同时发现围压与动剪切模量、阻尼比近似成线性关系等规律。相关研究成果可为海洋工程场地的设计、施工及抗震分析提供技术参考依据。As an important producing area of offshore oil&gas in Bohai Bay,Chenghai Block of Dagang Oilfield is located in the west coast of Bohai Bay,a high incidence area of earthquakes.Therefore,seismic safety evaluation must be carried out according to dynamic parameters such as dynamic shear modulus and damping ratio of the engineering site in this area.The dynamic parameters of marine soil samples at different depths from 0 to 120 m in Chenghai sea area(Dagang)were measured and studied using resonance column tester.It is found that the dynamic shear modulus and damping ratio of the marine soil in the sea area decreases and increases respectively with the increase of the dynamic shear strain,and the confining pressure is approximately linear with the two.The relevant research results can provide technical reference for the design,construction and seismic analysis of offshore engineering sites.

关 键 词：埕海 海洋土 共振柱 动剪切模量 阻尼比 

分 类 号：P744.4[天文地球—海洋科学]