UCMP M10 X 110 / 20 HD

UCMP M10 X 110 / 20 HD

Product Description

The UCAS Undercut Anchor is a heavy duty mechanical undercut anchor designed to develop a ductile steel failure. The UCAS Undercut Anchor System includes either the UCMP and UCFP pre-setting or UCMT and UCFT through-fastening type anchors, pilot bits, under cutter, setting tool, and under cutting quality detection device for all of model. The UCAS Undercut Anchor is available om a sherardized and type 316 stainless steel versions for outdoor environments offered in two lengths to accommodate various material thicknesses to be fastened.

Product Features

• Undercut segments provide cast-in-place same performance withe none expansion stresses.
• Under cutter provide an easy and reliable anchor installation.
• Excellent performance in cracked and none cracked concrete.
• Undercut keying load transfer allows for reduced edge distances and anchor spacing.
• Through-fastening type provides increased shear capacity.
• Unmovable and Fully removable.
• Type 316 stainless steel for corrosive environments.
• Sherardized zinc coating has equivalent corrosion resistance to hot dipped galvanizing.

Guide Specification

Undercut anchors shall be of an undercut style with under cutter on the embedded end that perform the undercutting process. Undercut portion of anchor shall have a minimum projected bearing area equal to or greater than 6.0 times the nominal bolt area. The bolt shall confirm to ISO 898 class 8.8 strength requirements. Anchors dimensioned and supplied by UCAS.

UCMP M10 X 110 / 20 HD

UCMP M10 X 110 / 20 HD

先置式（Pre-Setting Type）与贯穿式（Through-Fastening Type）的区别

 

 

扩孔型锚栓（Undercut Anchors）的型式（Type）：

先置式（Pre-Setting Type）与贯穿式（Through-Fastening Type）的区别

#Pre-Setting #Through-Fastening #Undercut #UndercutAnchors
#先置式 #贯穿式 #扩孔型锚栓 #后切底锚栓 #后扩底锚栓 #预扩孔锚栓 #自切底锚栓 #预扩底锚栓 #自扩底锚栓

Adhesive anchor is very dangerous!

Adhesive anchor is very dangerous!

 

Summary of in-depth survey report references related Sasago tunnel ceiling collapse accident.

#Adhesive
#Anchors
#Sasago #Collapse #Accident 

超级多刃钻头（DELTAGON BITS）

 

超级多刃钻头（DELTAGON BITS）

扩孔型锚栓（The Undercut Anchors）

1.         什么是扩孔型锚栓

通过锚孔底部扩孔与锚栓膨胀件之间的锁键形成锚固作用的锚栓。（JGJ145-2004 2.1.4 、ETAG 001 Part 3, Page 2）

图1   机械锁键示意

2.         扩孔型锚栓的类型

2.1.        扩孔型锚栓的类型（按扩孔方式）

扩孔型锚栓根据其扩孔方式分为预扩孔锚栓和自扩孔锚栓。（JGJ145-2004 2.1.4、GB50367-2006 13.1.3）

2.1.1.       预扩孔锚栓

通过专用的扩孔工具（扩孔钻头）在锚孔底部预先扩孔的扩孔型锚栓。

预扩孔锚栓在市场上又称作后切底锚栓，后扩孔锚栓，预扩孔锚栓、预扩底锚栓。

2.1.1.1.       预扩孔锚栓的安装

在钻取直孔的基础上，再使用专用的扩孔工具（扩孔钻头），在锚孔的底部预先形成如图2及图3所示的扩孔。通过敲击锚栓套管的方式，使锚栓的扩张机构在底部扩孔中进行扩张，填满底部已扩张的空间。

图2   预扩孔锚栓的直孔

 

图3   预扩孔锚栓的扩孔

2.1.1.2.       预扩孔锚栓的特点

• 非常安全可靠；
• 膨胀应力为零。

2.1.2.       自扩孔锚栓

通过安装在扩张机构上的扩孔刀头在锚孔底部旋转切割扩孔和挤压扩张安装的扩孔型锚栓。如果自称自扩孔锚栓的锚栓，在扩张机构上没有扩孔刀头，没有旋转切割和挤压扩张这两个特点，那么它就是冒充自扩孔锚栓的膨胀型锚栓。

自扩孔锚栓在市场上又称作自切底锚栓、自扩底锚栓。

2.1.2.1.       自扩孔锚栓的安装

在钻取底孔的基础上，使用电锤旋转挤压锚栓，使锚栓扩张机构上的刀头在锚孔底部旋转切出如图3所示的扩孔，同时扩张机构在底部的扩孔中进行扩张，填满底部已扩张的空间。

图4   自扩孔锚栓的底孔

2.1.2.2.       自扩孔锚栓的特点

• 扩孔与安装同步完成；
• 仍存在较大膨胀应力。

2.2.        扩孔型锚栓的类型（按工作方式）

扩孔型锚栓根据其工作方式又可分为位移控制扩孔型锚栓和扭矩控制扩孔型锚栓。（JGJ145-2004 2.1.4、JG160-2004 3.1.3、GB50367-2006 13.1.3）

2.2.1.       位移控制型锚栓

或称先置式扩孔型锚栓，即通过对锚栓施加拉力来控制锚固作用的方式。

2.2.1.1.       位移控制扩孔型锚栓的特点

锚栓的套管完全进入混凝土中，只有螺杆穿过被固定物。

图5   先置式扩孔型锚栓

2.2.2.       扭矩控制型锚栓

或称贯穿式扩孔型锚栓，即通过对锚栓施加扭矩来控制锚固作用的方式。

2.2.2.1.       扭矩控制扩孔型锚栓的特点

锚栓的套管部分露出混凝土外，完全进入固定物内部。可承受巨大的扭矩。

图6   贯穿式扩孔型锚栓

3.         扩孔型锚栓的承载力值

3.1.        拉伸承载力：（大间距大边距的条件下）

3.1.1.       钢材破坏平均拉伸承载力值

NRu,m=Asfu,test                                                                                              （3.1.1）

NRu,m：钢材破坏平均拉伸承载力

As：有效应力截面面积

fu,test：钢材的拉伸强度

3.1.2.       混凝土锥形破坏平均拉伸承载力值

NRu,m=13.5hef1.5fc,test0.5 v=15%                                                          （3.1.2）

NRu,m：混凝土锥形破坏平均拉伸承载力

hef：锚栓的有效埋深

fc,test：混凝土的压缩强度

3.1.3.       平均拉伸承载力的确定

NRu,m=min(NRu,m1,NRu,m2NRu,mn)                                                            （3.1.3）

NRu,m：平均拉伸承载力

min()：取最小值

NRu,mn：各种破坏形式下的平均拉伸承载力

3.2.        剪切承载力：（大间距大边距的条件下）

3.2.1.       钢材破坏平均剪切承载力值

VRu,m=0.6Asfu,test                                                                                   （3.1.4）

VRu,m：钢材破坏平均剪切承载力

As：有效应力截面面积

fu,test：钢材的拉伸强度

3.2.2.       剪切承载力的确定

VRu,m=min(VRu,m1,VRu,m2VRu,mn)                                                              （3.1.5）

VRu,m：钢材破坏平均剪切承载力

min()：取最小值

VRu,mn：各种破坏形式下的平均剪切承载力

4.         扩孔型锚栓的应用领域

4.1.        锁键型锚栓

英文名称：Shearkey Anchors

由胶体代替金属形成机械锁键的扩孔型锚栓。性能优于所有类型的化学锚栓。

4.2.        混合型锚栓

英文名称：Hybrid Anchors

扩孔型锚栓和化学锚栓的结合体。空隙部分使用胶体完全填充。混合型锚栓的刚性较扩孔型锚栓大。

4.3.        后预埋锚栓

英文名称：Long Life Fastening Anchors（LLFA）

扩孔型锚栓和植筋的结合体。空隙部分使用胶体或是灌浆料填充。其拉伸承载力的特性曲线与预埋锚栓几乎完全一致。

5.         扩孔型锚栓的市场情况

待续。

参考文献：

1. GB50367-2006 混凝土结构加固设计规范及条文说明　　　　  　（中国）
2. JGJ145-2004 混凝土结构后锚固技术规程及条文说明                      （中国）
3. JG160-2004 混凝土用膨胀型、扩孔型建筑锚栓                                （中国）
4. あと施工アンカー・連続繊維補強設計・施工指針                              （日本）
5. ETAG001-Part3-Amendment-10-08-01                                                   （欧盟）
6. ETAG-001-Annex-A 07-11-13                                                                  （欧盟）
7. ETAG-001-Annex-B 07-11-13                                                                  （欧盟）
8. ETAG 001-Annex C 10-08-01                                                                   （欧盟）

THE UCAS ANCHORING SYSTEM（Post-Installed System）

UCAS ANCHORING SYSTEM（Post-Installed System）

#Undercut
#Post-Installed
#Pilot Bits
#Under Cutter
#Setting Tools

Undercut Anchors: UCMP M20 X 155 / 50 LD

UCMP M20 X 155 / 50 LD

UNDERCUT ANCHORS PRE-SETTING LIGHT DUTY TYPE
MODEL UCMP M20 X 155 / 50 LD


UCAS ANCHORING SYSTEM:


Characteristics:

• Undercut anchor realizes ideal anchor works that prevent anchor bolts from sliding or slipping off.
• In order to deliver full performance of an anchor, use our Pilot bit for making pilot holes close to a perfect roundness. 

Applications:

• Execution of various anchor works.

#Undercut  
#Anchors
#扩孔型锚栓
#后切底锚栓
#轻型先置式

Undercut Anchors: UCMP M12 X 80 / 25 LD

UCMP M12 X 80 / 25 LD

UNDERCUT ANCHORS PRE-SETTING LIGHT DUTY TYPE
MODEL UCMP M12 X 80 / 25 LD
扩孔型锚栓 轻型先置式

• 无脱出、无滑移，广泛应用于悬吊。目前最广泛应用于地铁及幕墙行业。

Characteristics:

• Undercut anchor realizes ideal anchor works that prevent anchor bolts from sliding or slipping off.
• In order to deliver full performance of an anchor, use our Pilot bit for making pilot holes close to a perfect roundness. 

Applications:

• Execution of various anchor works.

#Undercut  
#Anchors
#扩孔型锚栓
#后切底锚栓
#轻型先置式

Undercut Anchors: UCMP M8 X 40 /15 LD

UCMP M8 X 40 /15 LD

UNDERCUT ANCHORS PRE-SETTING LIGHT DUTY TYPE
MODEL UCMP M8 X 40 /15 LD
扩孔型锚栓 轻型先置式

• 无脱出、无滑移，广泛应用于悬吊。

Characteristics:

• Undercut anchor realizes ideal anchor works that prevent anchor bolts from sliding or slipping off.
• In order to deliver full performance of an anchor, use our Pilot bit for making pilot holes close to a perfect roundness. 

Applications:

• Execution of various anchor works.

#Undercut #Anchors
#扩孔型锚栓
#后切底锚栓
#轻型先置式

UNDERCUT ANCHORS PRE-SETTING HEAVY DUTY TYPE MODEL UCMP M16 X 100 / 40 MD

UNDERCUT ANCHORS PRE-SETTING MEDIUM DUTY TYPE MODEL UCMP M16 X 100 / 40 MD

UNDERCUT ANCHORS PRE-SETTING MEDIUM DUTY TYPE MODEL UCMP M16 X 100 / 40 MD

 

UNDERCUT ANCHORS PRE-SETTING MEDIUM DUTY TYPE MODEL UCMP M16 X 100 / 40 MD