Luoyang Gongyan Technology Co., Ltd.
Main products:rock bolt,hollow bar,FRP rock bolt,thread bar,friction bolt
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  • Contact Person : Ms. Xing kelly
  • Company Name : Luoyang Gongyan Technology Co., Ltd.
  • Tel : 86-379-63501959
  • Fax : 86-379-63501159
  • Address : Henan,Luoyang,Room 1102,Aolin Building, Taikang Road, Wangcheng Avenue
  • Country/Region : China
  • Zip : 471023

Expanshion grouted rock anchor bolt

Expanshion grouted rock anchor bolt
Product Detailed
1.Expanshion grouted rock anchor bolt 2.Designed for hard rock at fractured zone 3.With expanshion shell head 4.Low price

          Expanshion grouted rock anchor bolt consists of steel shell-expansion anchor head, hollow anchor rod, grouting stopper, arch plate and nut. Coupling and grouting block are optional. It is designed for hard rock at fractured zone with growing joints which may cause loosing of fractured rock and reducing of friction between rocks, resulting in loosing of surrounding rocks in larger area. Applying enough pre-stress would keep its stability.

 

Construction Method:

 

1). Drill the hole and clean

2). Insert the anchor bolt to the hole bottom

3).Pre-stress the anchor rod and assure the anchor head contacting closely with hole bottom, then rotates the anchor rod until it is fastened, and install stopper, plate and nut;

4).Apply pre-stress to the designed value ,use the stretching gauge of anchor bolt or spanner;

5).Connect of grouting joints to grout

 

Technical Specification:

specification

GY25

GY28

GY32

external diameter(mm)

25

28

32

Breaking load(KN) 

>150-180

>180-220

>220-250

Interior diameter(mm)

≥15

≥17

≥22

drilling diameter(mm)

42

42

51

thread type

               left hand

standard length(m)

1.0/1.5/2.0/2.5/3.0/3.5/4.0/4.5/5.0/6.0

length tolerance

±2.5%                                                                                                       

Expanshion grouted rock anchor bolt



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