Product introduction:
Grouted hollow anchor bolt embodies anchor body, drilling bit, stopper, arch plate and nut as a whole. which is characterized by seamless steel pipe with thick wall and perfect thread shaping technology ,Combined the functions of anchoring bolt and grouting pipe into one. It functions as grouting pipe during grouting, then it functions as bolt after grouting and no need pulling it out.
Application:
It can be widely used in tunnel pre-support, warp and foundation pit support, slope and foundation pit reinforcement, defect and repair of tunnel etc.
Technical parameter:
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specification
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GY25
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GY28
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GY32
|
|
external diameter (mm)
|
25
|
28
|
32
|
|
tensile strength (KN)
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≥150-180
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≥180-220
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≥220-250
|
|
grouting hole diameter (mm)
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≥15
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≥17
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≥22
|
|
drilling hole diameter (mm)
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42
|
42
|
51
|
|
rotary direction
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left
|
||
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standard length (m)
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3 3.5 4 4.5
|
||
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length error
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±2.5％
|
||
Remarks:
Can be made all kinds of anchor bolt with different specification and strength by customer’s request