Full threaded steel self drilling rock bolt / hollow anchor bar / hollow anchor rod

Short Description:

The Self Drilling Anchor system is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling, anchoring and grouting in a single operation. Self drilling anchor system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc projects.


  • FOB Price: US $0.5 - 100 / Piece
  • Min.Order Quantity: 100 Piece/Pieces
  • Supply Ability: 10000 Piece/Pieces per Month
  • Delivery : Within 10 days
  • Quality : Support third-party detection
  • Payment: TT/LC
  • Product Detail

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    Full threaded steel self drilling rock bolt / Hollow anchor bar / Anchor rod
    The Self Drilling Anchor system is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling,anchoring and grouting in a single operation.Self drilling anchor system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc projects.

     Advantages and Characteristics as below:

    1. No casings required, because anchor bars can be drilled into loose soils without needing casings to support the boreholes.
    2. Fast drilling and installation, because drilling, installation and grouting are in a single operation.
    3. Both rope threads and trapezoid threads are robust and ideal for rotary-percussive drilling and ensuring a high level of bondwith the borehole gout.
    4. The hollow core not only serves for flushing during drilling, but also for grouting after drilling.
    5. Continuous threads ensure the bars can be cut and coupled at any point, or extended.
    6. Different anchor bits are available for different ground conditions.

    anchor bar composition

    Dimension

    R-Thread Hollow anchor Bar
    Size
    Outer Dia.(mm)
    Ultimate Lad(kN)
    Yield Load(kN)
    Weight(kg/m)
    R25N
    25
    200
    150
    2.35
    R32L
    32
    210
    160
    2.8
    R38N
    38
    500
    400
    5.45
    R51N
    51
    800
    630
    8.15
    T-Thread Hollow anchor Bar
    T30L
    30
    220
    180
    2.9
    T40S
    40
    660
    525
    6.8
    T52N
    52
    929
    730
    10.2
    T73L
    73
    1160
    970
    13.2
    T76S
    76
    1900
    1500
    19.7
    T103N
    103
    2270
    1800
    23.5
    T111N
    111
    3650
    2750
    34.5
    T127L
    127
    2400
    1810
    30.5
    T130S
    130
    7940
    5250
    78
    T150S
    150
    8400
    5600
    108
    T200S
    200
    14230
    9500
    183
    Steel Grade
     Acc. to EN10083-1
    Thread Direction 
     Left  Hand
    Thread Standrd

    R thread anchor bar or called rock bolt, soil nail, which is a kind of threaded hollow bar, bar surface with an rope thread according to ISO 10208 & 1720. It was firstly invented by MAI on 1960S to solve the low construction speed on complicated underground works, nowadays; it is very popular all around the world.

     

     

     


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