大连海域单桩基础冲刷特征及防冲刷措施  

Scouring Characteristics and Anti-scouring Measures of Single Pile Foundation in Dalian Sea Area

作　　者：刘仁海 孙智 李君 葛畅 LIU Renhai;SUN Zhi;LI Jun;GE Chang(Powerchina Huadong Engineering Corporation,Hangzhou 311122,China;Zhejiang East China Engineering Consulting Co.,Ltd.,Hangzhou 311122,China;Ocean College,Zhejiang University,Zhoushan 316021,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,浙江杭州311122 [2]浙江华东工程咨询有限公司,浙江杭州3111223 [3]浙江大学海洋学院,浙江舟山316021

出　　处：《水电与新能源》2022年第4期41-45,共5页Hydropower and New Energy

基　　金：中国电建集团华东勘测设计研究院有限公司科技项目(KY2020-ZX-16)。

摘　　要：针对大连某海上风电场项目大直径单桩基础冲刷防护施工技术研究,采用多波束测量方法,对24台风机基础进行监测,结果显示距风机中心半径21 m范围内,最大坑深度为0.77~1.93 m,平均冲刷量为113 m^(3),最大252 m^(3)。基于冲刷监测结果,提出采用袋装砂回填方法,通过铺排船进行施工,采取由内向外分层分段式的抛填方案,有效解决了风电场大直径单桩基础冲刷问题。The anti-scouring technology of large-diameter single pile foundation in an offshore wind farm in Dalian sea area is studied.The multi-beam measurement method is adopted to monitor the local scouring of 24 wind turbine foundations.It shows that within the area of a radius of 21 m from the wind turbine center,the maximum depth of the scouring pits is 0.77 m to 1.93 m,and the average scouring volume is 113 m^(3)with the maximum value of 252 m^(3).Based on the monitoring results,the backfilling method with bagged sand is proposed.The backfilling construction is carried out by laying ships,and the layered and segmented dumping scheme from the inside to the outside is adopted.With the proposed measures,the scouring problem of large-diameter single pile foundation of offshore wind farm is effectively solved.

关 键 词：单桩基础 局部冲刷 袋装砂回填 海上风电 

分 类 号：TM614[电气工程—电力系统及自动化]