预应力锚栓风机基础设计局压承载力探讨  

Discussion on Local Compression Bearing Capacity of Prestressed Bolt Wind Turbine Foundations Design

作　　者：吴强 贺广零 邹庆水 WU Qiang;HE Guang-ling;ZOU Qing-shui(Hunan Sanyi Smart New Energy Design Co.Ltd,Changsha 415000,China;Beijing Jingneng Clean Energy Power Co.Ltd,South China Branch,Zhanjiang 534000,China)

机构地区：[1]湖南三一智慧新能源设计有限公司,长沙415000 [2]北京京能清洁能源电力股份有限公司华南分公司,广东湛江534000

出　　处：《工程建设与设计》2022年第3期32-35,共4页Construction & Design for Engineering

摘　　要：预应力锚栓连接是目前最常用的一种风机基础与上部塔筒连接型式,这种型式较基础环式连接最大的差异在于,预应力锚栓风机基础台柱区域混凝土受预应力紧固,锚栓上、下锚板与混凝土接触面存在较为明显的局部受压现象。而NB/T10311-2019《陆上风电场工程风电场风电机组基础设计规范》未给出该位置高强灌浆料与混凝土明确的强度验算方法,如何计算预应力锚栓风机基础局部受压承载力成为设计人员急需解决的问题。论文以实际工程为例,给出预应力锚栓风机基础局部受压验算(灌浆料强度验算、灌浆料下方混凝土强度验算、下锚板上方混凝土强度验算)的具体算法,同时还给出了高强灌浆料抗压强度设计值建议计算方法,锚杆预拉力修正系数建议值。Prestressed bolt connection is the most commonly used connection type between the foundation and the wind turbine tower,compared with the foundation ring connection, the biggest difference of this type is that the concrete in the center area of the foundation is fastened by the prestress, the contact surface between the anchor plate and the concrete is obviously under local pression.However, NB/T10311-2019 the Code for Design of Wind Turbine Foundations for Onshore Wind Power Projects does not provide a specific calculating method for high-strength grouting material and concrete at this location, therefore, how to calculate the local compression bearing capacity become an urgent problem for the designer. Taking a practical project as an example, this paper provides a specific calculation method(including the strength calculation of high-strength grouting material, the strength calculation of concrete under the high-strength grouting material and the strength calculation of concrete on the anchor plate at the bottom of foundation) for calculating local compression of prestressed bolt wind turbine foundation, also provides recommended calculation method of the design value of design value of compressive strength for the high-strength grouting materials and recommended value of correction factor of anchor bolt pretension.

关 键 词：预应力锚栓 风机基础 局部受压承载力 

分 类 号：TM315[电气工程—电机] TU757.2[建筑科学—建筑技术科学]