Self Drilling Pipe Roof System 76*6 89*5 108*6 127*6

Self Drilling Pipe Roof System

Self drilling pipe roof system can solve the constuction poblem of hole collapse, stiking, and inability to insert ordinary pipe roof after drilling under the rock conditions of grade IV and V. Supporting with self pipe roof ststem features high support rigidity and samll radial plastic deformation of the surrounding rock. After support, a bearing arch is formed, which efectively ensures the safety of tunnel boring and initial support.

Product Description

Self Drilling Pipe Roof System

Self Drilling Pipe Roof System

Pipe roofing is mainly used in tunnel projects with soft and broken surrounding rock, such as high-way and railway tunnels, subways, hydropower station tunnels and other underground projects. Tra- ditional pipe roofs generally are seamless steel pipes, and common specifications are 76×6,  89×5,  108×6,  127×6, etc. The construction technology of traditional pipe roofs is drilling the hole, extracting drill rod, inserting pipe roof, and finally grouting. Holes collapse may occur during construction in weak surrounding rock, which makes it difficult to insert pipe roof, so casing is required.
Self drilling pipe roof system consists hollow anchor bar, coupling and drill bit, which can be drilled and grouted at one time. Self drilling pipe roof system can replace traditional pipe roofs in a variety of easily collapsed formations, and common specifications are R5l, T76, T103, etc.

Self Drilling Pipe Roof System

During application, the biggest influence on the service life of anchor bolt is the corrosion of surrounding environment, so it is especially important to have anti-corrosion anchor bolt. To meet customer’ s demand, Hengnuo specializes in providing a variety of anti-corrosion anchor bolt systems, such as hot dip galvanizing anchor bolt, epoxy coating anchor bolt, the duplex (multiple) coating anchor bolt combining the above two processes. Self driling anchor system is a new method that integrates drilling, grouting and anchoring functions together. lt is especially suitable for construction in loose soil, broken rocks, pebble layers and other collapsible geological conditions. in order to give full play to the advantages of self drilling anchor bars, our company has developed the first domestic drilling rig specially used for self drilling anchor bars after more than one hundred investigations and tests. The special drilling rig for self drilling anchor bars has the characteristics of high safety performance good anchoring effect, and high construction efficiency, which can greatly save the overall construction cost.

Self Drilling Pipe Roof System

Specification
Size
O.D(mm)
I.D(mm)
Ultimate Load(KN)
Yield Load(KN)
Weight(kg/meter)
R25N-14
25.0
14.0
200
150
2.3
R32L-22
32.0
22.0
220
180
2.8
R32N-21
32.0
21.0
280
230
2.9
R32N-18.5
32.0
18.5
280
230
3.4
R32S-17.5
32.0
17.5
360
280
3.5
R32S-15
32.0
15
360
280
4.1
R38N-21
38.0
21.0
500
400
4.8
R38N-19
38.0
19.0
500
400
5.5
R51L-38
51.0
38.0
550
450
6.0
R51L-36
51.0
36.0
550
450
7.6
R51N-36
51.0
36.0
800
630
7.6
R51N-33
51.0
33.0
800
630
8.4
T76N-49
76.0
49.0
1600
1200
16.5
T76S-45
76.0
45.0
1900
1500
19
T30-11
30.0
11.0
320
260
3.3
T30-14
30.0
14.0
275
220
2.9
T40-16
40.0
16.0
660
525
7.1
T40-20
40.0
20.0
540
425
5.6
T52-26
52.0
26.0
930
730
10
T73-56
73.0
56.0
1035
830
10.8
T73-53
73.0
53.0
1160
970
14
T73-45
73.0
45.0
1600
1270
17.5
T73-35
73.0
35.0
1865
1430
21.2
T103-51
103.0
51.0
3660
2670
44
Steel grade
Acc. to EN10083-1 / EN10210-1
Thread direction
Left hand / Right hand

Service

Self Drilling Pipe Roof System

  • The technical support team may provide remote or on-site support to resolve issues encountered by users during use.
  • Provide original spare parts to ensure timely replacement of worn or damaged parts to maintain the normal operation of DTH bits.
  • Timely information reply throughout the day, the first time to solve your problems.

Self Drilling Pipe Roof System

tag:

Self Drilling Anchor System, Self Drilling Rock Bolt Product, Self Drilling Pipe Roof System

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