陆上风机基础缺陷分析与灌浆加固研究  

Study on defect analysis and grouting reinforcement of onshore wind turbine foundation

作　　者：李进平[1] 王振扬 陈加兴 苏凯[1] LI Jinping;WANG Zhenyang;CHEN Jiaxing;SU Kai(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;PowerChina Zhongnan Engineering Corporation Limited,Changsha 410014,China)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《华中科技大学学报（自然科学版）》2021年第11期107-112,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51879207)。

摘　　要：结合西南某风电工程实例,引入混凝土塑性损伤模型研究基础混凝土损伤规律;根据勘测资料确定脱空冒浆缺陷范围,分析其对基础安全影响;针对灌浆加固中灌浆料的选择问题,对比了灌浆料弹性模量对加固效果的影响.分析结果表明:基础裂缝集中在基础环上排穿孔及下法兰附近;在脱空冒浆缺陷下,基础环倾斜量、穿孔钢筋应力及基础裂缝区环向扩展范围均明显增大;灌浆加固可有效降低穿孔钢筋应力及混凝土开裂范围,减小基础环倾斜量,但灌浆料弹性模量过高会加重下穿孔钢筋承载,工程中推荐采用弹性模量在1~6 GPa范围内的化学灌浆料.Combined with a wind turbine project in Southwest China,the damage characteristic of the wind turbine foundation was studied by the concrete plastic damage model.The range of gap-inanition defect was determined by the survey data,and the impact of defect on the foundation security was analyzed.The selection of grouting materials in the grouting reinforcement were discussed,and the influence of the grouting materials’ elastic modulus on the grouting reinforcement was considered.Analysis results show that the crack area of the foundation is concentrated near the upper row of perforated rebar and the bottom flange of the metal ring;the gap-inanition defect will significantly increase the tilt rate of the metal ring,the stress of perforated rebar and the circumferential expansion range of the cracked area;the grouting reinforcement can effectively reduce the stress of the perforated rebar,the volume of the cracked concrete and the tilt rate of the metal ring.The stress of the lower row of perforated rebar will increase as the grouting materials’ elastic modulus increases,and the chemical grouting materials with an elastic modulus in the range of 1 to 6 GPa is recommended in the project.

关 键 词：风机基础 灌浆加固 基础环 脱空冒浆缺陷 数值模拟 

分 类 号：TU470.3[建筑科学—结构工程]