split set anchor bolt
The three-dimensional part of the pipe seam anchor rod is a high-strength steel pipe with a longitudinal seam. When installed in a borehole slightly smaller than the diameter, it can immediately apply radial pressure to the borehole wall and prevent the frictional force of the surrounding rock from sliding down throughout the entire length. With the support of the anchor rod tray, the surrounding rock is in a three-dimensional stress state and rock stability is achieved. In the case of blasting vibration and rock anchoring displacement, the anchoring force increases significantly in the later stage. When the rock undergoes significant displacement, the anchor rod does not lose its supporting resistance, and it has better characteristics than the expansion shell anchor rod
The specification parameters of pipe seam anchor mainly include the following aspects:
Outer diameter: Usually available in specifications such as Φ 30, Φ 33, Φ 40, and Φ 43 (± 0.5).
Length: Generally available in different length options such as 1200, 1500, 1800, 2000, 2500, etc.
Material: Common materials include Q235, 16Mn, 20Mnsi, etc.
Technical performance:
Initial anchoring force: 3-7 tons.
Pipe ring pull-out load: 8-10 tons.
Anchor rod pipe tensile strength: 12-13 tons.
The corrosion resistance is 20-30% higher than A3 steel, which is beneficial for long-term use.
Technical requirements:
The surface of the seam pipe anchor rod should be flat, without serious scratches or rust. The weld seam should have no cracks, no pores or slag inclusions, and it is not allowed to burn through the pipe wall. The tray should be able to move freely on the pole. It is advisable to have the blocking ring interface and the pipe seam opening offset by 170 ° -190 ° from each other.
The pull-out force of the retaining ring weld is ≥ 80kN, the ultimate tensile strength of the rod body is ≥ 110kN, the initial anchorage force is ≥ 25kN/m, and the tray bearing capacity is ≥ 65kN.
The above are the main specifications of pipe seam anchor rods, which can be selected according to different usage needs and environments.
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