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Shaft bolts type M1, W1, W2

Application

  • Shaft bolts type M1 ; W1 ; W2 are used to connect the reinforcement support with the shaft lining and to fit pipeline or cable holders and other fixtures in the shaft.
    Bolts are also used to fix equipment and machines installed in horizontal roadways.

Photos

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Technical description

  • Depending on the design the following types of bolts can be distinguished:
    1. M1 wedge bolt applied at pretension of up to 60 kN,
    2. W1 wedge adhesive bolt at pretension of up to 100 kN,
    3. W2 cylindrical adhesive bolt at pretension of up to 80kN,
  • Application conditions – according to BN-78/0436-03 standard - "Bolts"

 

Bolt type

 

Name

 

Curing agent

Recommended use

 

Comments

 

M1

wedge bolt
cement grout
concrete
suitable for shafts with hoisting equipment using vessels of pay load up to 10 kN and for anchorage of additional elements in the shaft

W1

wedge resin bolt

polymer grout

all types of lining

suitable for shafts with hoisting equipment using vessels of pay load up to 30 kN; loads may be applied immediately after installation

W2

cylindrical adhesive bolt
polymer grout

all types of lining

suitable for shafts with hoisting equipment using vessels of pay load up to 20 kN, loads may be applied 30 minutes after bolt installation
  • M1; W1; W2 bolts should be installed in compliance with BN-84/0436-04 standard "Bolt connection of reinforcement and shaft lining”.
  • The rod is made of plain bar of ø30 mm.; bolt length – 320 ; 400 mm (or different according to requirement – max. 2500 mm).
  • For special purposes bolts may be galvanised.

 

Technical data

Bolt type

Rod length Lp

Rod diameter

Rod thread

Hole length

Lo

Hole diameter

 

Max.protension Nw

M1

320 mm
ø30 mm
M30
235÷255 mm
ø33±1 mm

 

40 kN
400 mm
315÷335 mm
60 kN

W1

320 mm
235÷255 mm
70 kN
400 mm
315÷335 mm
100 kN

W2

320 mm
215÷235 mm
60 kN
400 mm
295÷315 mm
80 kN

 

M1 bolt instalation procedure

  • Insert the rod with the wedge into the borehole of ø33 ± l made in concrete lining.
    Hammer the rod until it refuses to go further. After placing the attached element and a round washer of ø31 on the rod, put and tighten the M30 nut with appropriate torque tensioning the nut to the desired prestress.

 

W1 bolt instalation procedure

  • Insert a adhesive cartridge in the borehole of ø33 ± l made in the shaft. Insert the rod with the wedge to the desired depth and rotate while pushing causing the adhesive to mix. Then hammer the rod until it refuses to go any further After placing the attached element and a round washer of ø31 on the rod, put and tighten the M30 nut with appropriate torque tensioning the nut to the desired pretension.

 

W2 bolt instalation procedure

  • Insert a resin cartridge in the borehole of ø33 ± l made in the shaft. Insert the rod with the wedge to the desired depth and rotate while pushing causing the adhesive to mix. Leave until the adhesive has set After placing the attached element and a round washer of ø31 on the rod, put and tighten the M30 nut with appropriate torque tensioning the nut to the desired pretension.


M1; W1; W2 shaft bolts have Certificate of Compliance No. 74/1/2008 issued b "INOVA" Technical Innovation Centre Ltd. in Lubin.

 

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