140m钢-混凝土混合风力发电机塔筒预应力技术研究

Research on Prestressing Technique of A 140m Steel-concrete Wind Tower

我国是消耗能源大国,为了减少对非可再生资源的利用从而避免对环境造成巨大污染,风力发电作为一种可再生的清洁能源被各国日益重视并大力发展,随着风电机的容量增加,需增加其支撑的塔筒高度来获取更多的风能,这就对风电机塔筒的设计有了更高的要求,使其具有足够的强度和刚度来抵抗地震荷载与风荷载,同时对施工工艺有了更加严格的要求,施工的难度系数变大。结合深能高邮东部风场140m高钢-混凝土混合风电塔筒的预应力混凝土的结构特点,详细分析了预制混凝土塔筒拼装方法与其预应力工程施工过程中的关键点和难点,包括预应力孔道的留设与布置、锚固段的设置、张拉方式和张拉位置的选择、张拉伸长值的确定和校核、张拉后切割长度值得确定和封裹方法等,可为类似工程的实施提供参考和借鉴。

China is a major energy-consuming country. In order to reduce the use of non-renewable resources and avoid huge pollution to the environment,wind power is increasingly recognized and developed by countries as a renewable and clean energy. As the capacity of wind turbines increases,it needs to Increasing the height of the tower to support it to obtain more wind energy,which has higher requirements for the design of the wind turbine tower,so that it has suffcient strength and rigidity to resist earthquake loads and wind loads,and at the same time more stringent requirements,the diffculty of construction becomes larger. Combined with the structural characteristics of the prestressed concrete section of the 140-meter-high steel-concrete hybrid wind tower of the advanced wind farm in the deep energy,this paper analyzes in detail the key points in the construction process of the precast concrete tower and the construction process of the prestressed project. And diffculties,including the retention and arrangement of prestressed tunnels,the setting of anchoring sections,the selection of tensioning and tensioning positions,the determination and checking of tensile elongation values,the length of post-tensioning and the method of encapsulation etc.,can provide reference and reference for the implementation of similar projects.