缓粘结预应力抗浮锚杆设计研究  

Study on the design of retard-bonded prestressed anti-floating anchor

作　　者：熊学炜[1] Xiong Xuewei(China Railway Siyuan Survey and Design Group Co.Ltd,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《建筑科学》2022年第3期159-165,共7页Building Science

摘　　要：缓粘结预应力抗浮锚杆是一种新型抗浮锚杆,其设计验算暂无专门规范可循。为确保缓粘结预应力抗浮锚杆可靠的工程应用,首先结合其基本构造分析了其技术先进性,其次从理论上分析了其受力机理,然后结合受力机理与相关规范,对各项设计验算进行了分析,明确了验算内容与方法。分析表明,缓粘结预应力抗浮锚杆能够满足锚固体不同等级的裂缝控制要求,同时抗腐蚀能力以及防水性能良好。缓粘结预应力抗浮锚杆设计验算包括锚杆抗拔承载力验算、筋体强度验算、锚固体整体受压承载力验算、锚固体局部受压承载力验算、锚固体裂缝控制验算和底板结构抗冲切验算等,其设计验算过程应参照不同规范进行。The retard-bonded prestressed anti-floating anchor is a new type of anchor, and there is no special specification to follow for its design. In order to ensure the reliable engineering application of the retard-bonded prestressed anti-floating anchor, the technical advancement is firstly studied in combination with its basic structure, and then its stress mechanism is theoretically analyzed. Then combined with the stress mechanism and relevant specifications, the analysis of the design checks is conducted, and the checking content and method are clarified. The analysis shows that the retard-bonded prestressed anti-floating anchor can meet the crack control requirements of different grades, and has good corrosion resistance and waterproof performance. The design checks of the retard-bonded prestressed anti-floating anchor includes the pull-out bearing capacity of the bolt, the strength of anchor tendon, the overall compressive bearing capacity of the anchor, the local compressive bearing capacity of the anchor, the crack control of the anchorage body and the punching resistance of the bottom plate etc. Its design checks should be carried out in accordance with different specifications.

关 键 词：抗浮锚杆 锚固体 裂缝控制 缓粘结预应力 设计分析 

分 类 号：TU470.3[建筑科学—结构工程]