高强预应力锚栓预埋、先张法张拉及后灌浆技术

Embeding, Pretension and Post-Grouting Technology of High-Strength Prestressed Bolts for Steel Structure Base

深圳会议展览中心钢结构工程采用高强度、大直径预应力锚栓,用以锚固铰支座和拉接端头梁,由于设计要求先张拉后灌浆,所以预埋材料涉及了锚栓、锚板、波纹管、注浆管等。每一材料的质量和施工过程都必须严格控制,否则,将给张拉和灌浆工序带来很大困难,加上28.9m、45.0m处为高空作业,又加大了预埋、张拉的难度,使用合理的预埋方法和张拉工装是解决该工序的重要手段。本文主要介绍了该工程高强预应力锚栓预埋、张拉及灌浆的技术。

In the steel structure of Shenzhen convention & exhibition center high-strength and large-diameter prestressed bolts are used to anchor base for the structure and to tie the end beams.Because the structural design requires the base pretensioned and post-grouting,the embedded part of the base used bolts,anchor plate,corrugated pipe and injected pipe.If the quality and process of the embed is not be controlled strictly,it will be very difficult to pretension and grout.In this paper,the embedding,pretension and grouting technology of the high-strength prestressed bolts for this kind of the base is presented.