高压旋喷桩在海上风电桩周土加固中的应用  

Application of the high pressure jet grouting pile in soil reinforcement around offshore wind power pile

作　　者：郭琼玲 GUO Qiong-ling(Geotechnical and Environmental Enterprise Engineering Technology Research Center of Fujian Province/Fujian Yonking Geotechnical Co.,Ltd.,Longyan 364000,Fujian,China)

机构地区：[1]福建省岩土与环境企业工程技术研究中心/福建永强岩土股份有限公司,福建龙岩364000

出　　处：《地基处理》2023年第1期62-66,共5页Journal of Ground Improvement

基　　金：福建省科技计划项目(2021H4024);福建省科技计划项目(2020I1011)。

摘　　要：目前海上风电桩基础在海洋动力环境作用下出现过度水平位移的现象,通常采用增加桩径的方法来提高桩基水平承载力,造成钢管桩制作成本增加,施工难度大大提高,制约海上风电发展。本文结合海上风电工程实例,开展海洋地基加固技术对海上风电桩基础水平承载力影响的研究,探讨高压旋喷桩加固技术在海洋环境下的加固深度、工艺参数、加固效果等。通过加固后现场取芯及有限元实体模型验算结果表明,采用高压旋喷桩加固技术可有效强化风机桩周土层的刚度,达到提高桩基水平承载力、减小桩基础水平位移和降低工程成本的目的。可为海上风电工程防灾减灾提供技术支撑,具有重要的社会效益和推广应用价值。In view of the phenomenon of excessive horizontal displacement of offshore wind power pile foundation in dynamic marine environment, the method of increasing pile diameter is usually used to improve the horizontal bearing capacity of pile foundation. However, this method will increase the cost of steel pipe piles and increase the difficulty of construction, which will ultimately restrict the development of offshore wind power. Based on the example of offshore wind power project, this paper studies the influence of offshore foundation reinforcement technology on the horizontal bearing capacity of offshore wind power pile foundation. In addition, the reinforcement depth, process parameters, and reinforcement effects of the high pressure jet grouting pile reinforcement technology in the marine environment are discussed. The results of in-site coring and finite element model analysis show that the high pressure jet grouting pile reinforcement technology can effectively strengthen the soil layer around the wind power pile. The purpose of increasing the horizontal bearing capacity of the pile foundation, reducing the horizontal displacement of the pile foundation and reducing the engineering cost is achieved. It can provide technical support for disaster prevention and mitigation of offshore wind power projects, and has important social benefits and promotion and application value.

关 键 词：海上风电 水平荷载 土抗力 高压旋喷桩 有限元分析 

分 类 号：TU472[建筑科学—结构工程]