无粘结预应力抗浮锚杆抗渗漏性能研究  

Research on Anti-leakage Performance of Unbonded Prestressed Anti-Floating Anchor Rod

作　　者：郑重远 ZHENG Zhongyuan(China Railway 16th Bureau Group Urban Construction Development Co.,Ltd.,Beijing 100018,China)

机构地区：[1]中铁十六局集团城市建设发展有限公司,北京100018

出　　处：《工程质量》2024年第5期74-78,共5页Construction Quality

基　　金：中铁十六局集团科技研究开发计划项目(K2022-029)。

摘　　要：抗浮锚杆是地下工程设计中常用的一种抵抗地下水浮动力的措施,在地下水位高,抗浮工程设计等级为甲级的地下工程,已严格要求抗浮构件的边缘不出现裂缝,且按照荷载组合计算时,构件受拉边缘混凝土不应产生拉应力,在抗浮设计等级为甲级的地下工程中若采用抗浮锚杆则不能采用常规抗浮锚杆而必须采用预应力抗浮锚杆,以达到预期设计及使用工况要求。预应力抗浮锚杆实际施工过程中,因现场施工原因或者封锚端头设计原因等往往造成预应力抗浮锚杆张拉端出现渗漏问题,这对地下工程防水安全及使用带来极大隐患。论文通过对预应力抗浮锚杆抗渗漏性能研究有效解决了封锚端头渗漏封堵问题,且社会及经济效益明显。Anti floating anchor rod is a commonly used measure to resist the buoyancy of underground water in the design of underground engineering.In underground engineering with a high groundwater level and a Class A design level of anti-floating engineering,it is strictly required that the edges of anti-floating components do not appear cracks,and when calculated according to the load combination,the concrete at the tensile edge of the component should not generate tensile stress,If anti floating anchor rods are used in underground projects with a Class A anti floating design level,conventional anti floating anchor rods cannot be used.However,prestressed anti floating anchor rods must be used to meet the expected design and operating conditions.During the actual construction process of prestressed anti floating anchor rods,leakage problems often occur at the tensioning end of prestressed anti floating anchor rods due to on-site construction reasons or design reasons for anchor sealing ends,which brings great hidden dangers to the waterproof safety and use of underground projects.This article effectively solves the problem of sealing anchor ends through the study of the anti-leakage performance of prestressed anti floating anchor rods,and has significant social and economic benefits.

关 键 词：抗浮锚杆 地下工程 荷载组合 拉应力 封锚端 渗漏 封堵 

分 类 号：TU94[建筑科学—建筑技术科学]