CN103061513B - 一种钢筋机械锚固方法 - Google Patents

一种钢筋机械锚固方法 Download PDF

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CN103061513B
CN103061513B CN201210591670.6A CN201210591670A CN103061513B CN 103061513 B CN103061513 B CN 103061513B CN 201210591670 A CN201210591670 A CN 201210591670A CN 103061513 B CN103061513 B CN 103061513B
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CN103061513A (zh
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张谦
钱晓军
管俊峰
靳丽辉
姚贤华
陈爱玖
谢超鹏
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Albert Guizhou Construction Engineering Co., Ltd.
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North China University of Water Resources and Electric Power
Qinghai Nationalities University
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Abstract

一种钢筋机械锚固方法，涉及钢筋机械锚固，属于建筑工程领域。避免了钢筋锚固长度过长，尤其是避免高强度纵向受力钢筋锚固长度过长。本发明解决了用焊接方式连接钢筋和锚固板引发的焊接速度慢、焊接质量难以保证的问题；解决了钢筋末端弯钩锚固影响混凝土浇筑，锚固区拥挤的问题；解决了末端锚固容易发生的局部混凝土破坏问题。本发明将钢套管套在钢筋外面，用挤压设备对钢套管进行径向挤压，让钢套管发生塑性变形与钢筋横肋咬合形成整体，形成锚固，通过设置多个钢套管在钢筋锚固长度范围内形成多点锚固，增加锚固力，相对于只能在末端形成锚固的方法，使得钢筋的锚固长度相当于基本锚固长度的40%左右。本发明在建筑工程有广阔应用前景。

Description

一种钢筋机械锚固方法
技术领域
本发明涉及一种钢筋机械锚固方法，属于建筑工程领域。
背景技术
钢筋锚固是钢筋混凝土构件中要解决的最基本的问题，每根钢筋都需要可靠的锚固才能发挥其强度。现行国家标准《混凝土结构设计规范》GB50010的钢筋锚固有以下几种方法：
方法1：钢筋末端90度弯钩锚固，方法2：钢筋末端135度弯钩锚固，方法3：钢筋末端一侧贴焊锚筋锚固，方法4：钢筋末端两侧贴焊锚筋锚固，方法5：钢筋末端穿孔塞焊锚板锚固，方法6：钢筋末端螺栓锚头锚固。
方法1和方法2缺陷：不能作为受压锚固使用；弯钩锚固增加了钢筋量，造成锚固区拥挤，不利于混凝土浇筑；只是在钢筋末端形成了锚固，无法在钢筋锚固长度范围内形成多点锚固。
方法3缺陷：不能作为受压钢筋锚固；焊接长度较长，焊接速度慢；只是在钢筋末端形成了锚固，无法在钢筋锚固长度范围内形成多点锚固。
方法4缺陷：对混凝土保护层厚度要求高；焊接长度较长，焊接速度慢。
方法5缺陷：用塞焊的方式连接钢筋和锚板焊接速度慢，焊接质量不可靠；对混凝土保护层厚度要求高，由于只是在钢筋末端形成锚固，容易发生局部混凝土破坏。
方法6缺陷:只是在钢筋末端形成了锚固，无法在钢筋锚固长度范围内形成多点锚固；对混凝土保护层厚度要求高，由于只是在钢筋末端形成锚固，容易发生局部混凝土破坏。
目前我国新开发出的低碳低合金的高强热处理钢筋（屈服强度大于500兆帕，小于800兆帕）锚固长度相对普通强度钢筋的锚固长度更长。为此，需要提出新的机械锚固方法解决高强钢筋在工程中应用问题。
发明内容
本发明的目的在于避免钢筋锚固长度过长，尤其是避免高强度纵向受力钢筋锚固长度过长，提供一种钢筋机械锚固方法。本发明解决了用焊接方式连接钢筋和锚固板引发的焊接速度慢、焊接质量难以保证的问题；解决了钢筋末端弯钩锚固影响混凝土浇筑，锚固区拥挤的问题；解决了末端锚固容易发生的局部混凝土破坏问题。
本发明的目的是通过如下措施达到的：
将钢套管套在钢筋外面，用挤压设备对钢套管进行径向挤压，让钢套管发生塑性变形与钢筋横肋咬合成整体，形成锚固，通过设置多个钢套管在钢筋锚固长度范围内形成多点锚固。
钢套管需用低碳镇静钢制作，这样钢套管塑性较好，利于径向挤压，钢套管屈服强度为235兆帕。
钢套管长度不小于钢筋直径的1倍，钢套管横截面积不小于钢筋的横截面积，钢套管的内径要大于钢筋直径5毫米以上。
当钢筋锚固长度范围内钢套管的数量不少于2个时，必须有一个钢套管位于钢筋锚固长度的末端；两个钢套管之间的间距不小于1倍的钢筋直径，且不小于钢套管的长度。
本发明有益效果是：
由于采用了径向挤压钢套管的方法，相对焊接的方法速度快且质量可靠，能很方便的在钢筋锚固长度范围内多点设置钢套管，径向挤压设备可以利用现有的成熟设备，无需对设备的二次开发。
由于可以在钢筋锚固长度范围内多点设置钢套管，相对于只能在末端形成锚固的方法，能有效地缩短钢筋锚固长度，使得钢筋的锚固长度相当于基本锚固长度的40%左右，较大节省了锚固钢筋，提高了混凝土浇注质量，加快了施工进度，降低了成本，方便了施工；由于能在钢筋锚固长度范围内多点锚固，可以将锚固力分散，对混凝土保护层厚度要求降低，可以避免钢筋末端锚固带来的混凝土的局部破坏问题。
钢套管适合工业化大批量生产，有利于钢筋加工的现代化。
附图说明
图1钢筋设置多个钢套管锚固示意图
图中1为钢套管，2为钢筋
图2挤压钢套管示意图
图2中1为钢套管，2为钢筋，3为上压模，4为下压模。
具体实施方式
所有钢套管通过专业的机械公司加工，钢套管径向尺寸误差不超过±0.5毫米，长度尺寸误差控制在±1mm。
将钢套管套入钢筋，通过挤压设备上的高压油泵施加径向挤压力，使钢套管发生塑性变形和钢筋紧密咬合在一起即可完成钢筋的钢套管机械锚固，通过挤压多个钢套管即可形成对钢筋多点锚固。

Claims (1)

1.一种钢筋机械锚固方法，其特征是：将钢套管套在钢筋外面，用挤压设备对钢套管进行径向挤压，让钢套管发生塑性变形与钢筋横肋咬合成整体，形成锚固，钢套管需用低碳镇静钢制作，钢套管长度不小于钢筋直径的1倍，钢套管横截面积不小于钢筋的横截面积，当钢筋锚固长度范围内钢套管的数量不少于2个时，必须有一个钢套管位于钢筋锚固长度的末端，两个钢套管之间的间距不小于1倍的钢筋直径，且不小于钢套管的长度。
CN201210591670.6A 2012-12-29 2012-12-29 一种钢筋机械锚固方法 Expired - Fee Related CN103061513B (zh)

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CN106930472B (zh) * 2015-12-31 2020-01-03 中冶建筑研究总院有限公司 短套筒灌浆钢筋连接接头
CN105952059B (zh) * 2016-07-05 2024-01-23 北京交通大学 一种替代高强钢筋弯钩的钢筋锚固方法
CN109868945A (zh) * 2019-03-08 2019-06-11 长安大学 一种高强钢筋锚固结构及锚固方法

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CN2110043U (zh) * 1991-12-28 1992-07-15 北京市建筑工程研究所 挤压套筒锥螺纹钢筋连接件
US6185886B1 (en) * 1998-04-27 2001-02-13 Fischerwerke Artur Fischer Gmbh & Co. Kg Fixing element for reinforcement connection with a secondary action, especially for earthquake-resistant securement
CN2471871Y (zh) * 2001-03-21 2002-01-16 柳州市建筑机械总厂 钢丝绳锚夹具
CN101529028A (zh) * 2006-09-28 2009-09-09 冈部株式会社 钢筋的锚座
CN101649616A (zh) * 2008-08-14 2010-02-17 刘全林 锚固力可控的锚固件

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0131507A2 (fr) * 1983-07-06 1985-01-16 G.T.M.-ENTREPOSE Société Anonyme dite: Procédé pour la réalisation d'un ancrage de précontrainte par filage d'un manchon en acier sur un âme métallique
CN2110043U (zh) * 1991-12-28 1992-07-15 北京市建筑工程研究所 挤压套筒锥螺纹钢筋连接件
US6185886B1 (en) * 1998-04-27 2001-02-13 Fischerwerke Artur Fischer Gmbh & Co. Kg Fixing element for reinforcement connection with a secondary action, especially for earthquake-resistant securement
CN2471871Y (zh) * 2001-03-21 2002-01-16 柳州市建筑机械总厂 钢丝绳锚夹具
CN101529028A (zh) * 2006-09-28 2009-09-09 冈部株式会社 钢筋的锚座
CN101649616A (zh) * 2008-08-14 2010-02-17 刘全林 锚固力可控的锚固件

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