High-damping energy absorption anchor rod pallet

Abstract

The invention discloses a high-damping energy absorption anchor rod pallet, and belongs to the technical field of safety supports of geotechnical engineering. The pallet comprises an upper pallet 3, high-damping rubber 4 and a lower pallet 5, and the high-damping rubber 4 is sandwiched between the upper pallet 3 and the lower pallet 5. When an anchor rod is mounted, the lower pallet 5 clings surrounding rock wall, the anchor rod penetrates circular through holes 6 of the upper pallet 3, the high-damping rubber 4 and the lower pallet 5 and then is inserted into an anchor rod drilling hole, anda tightening nut 2 is screwed to press the upper pallet 3 through threads. The high-damping energy absorption anchor rod pallet can provide high bearing capacity, further absorb and dissipate a lot ofdeformation impact energy acting on a support system and effectively lead and control release and conversion of energy, high energy is consumed in the high-damping rubber compression deformation process, the influence of large deformation of deep surrounding rock or impact is effectively resisted, and the pallet is convenient to mount, low in cost, environmentally friendly and free from pollution.

Description

technical field [0001] The invention belongs to the technical field of safety support of geotechnical engineering, and in particular relates to a high-damping energy-absorbing bolt tray. Background technique [0002] Anchor is a kind of reinforcing member widely used in the stable support of surrounding rock structures in mining, slope, water conservancy and hydropower and other geotechnical engineering. In the bolt support, the tray is the bridge between the surrounding rock and the bolt body. Since the force of the bolt acting on the surface of the roadway is a concentrated point load, if the bolt nut directly acts on the surrounding rock, there will be a huge Due to the stress concentration in the surrounding rock, it is easy to penetrate the surrounding rock and cause the bolt to fail. For this reason, the pallet connection is used to realize load transmission and play a bearing role. The tray is the key structure for the anchoring force of the anchor to be fully exerte...

AI Technical Summary

Problems solved by technology

Patent Application No. 201010515672 discloses a continuous progressive pressure anchor tray, which is squeezed out of the surrounding rock wall by the butterfly tray with multiple ring-shaped pressure grooves, so that it has a certain deformation pressure function, but the pressure engineering resistance is unstable, which will easily lead to the failure of the anchor rod, and the groove processing is difficult

Patent No. CN201381866Y discloses a trapezoidal steel structure anchor tray. Although it is easy to process, low in cost and has a certain strength, it is difficult to prevent impact failure, and it is easy to be penetrated by the anchor under the action of dynamic load. disable support system

Patent No. CN105781599A discloses an energy-absorbing bolt tray, which realizes yielding pressure and absorbing energy through axial cracking of the energy-absorbing tube, but has limited ability to adjust deformation for large-deformed surrounding rocks

In short, the existing anchor trays have poor energy absorption and anti-scouring effects, and it is difficult to meet the protection needs of deep underground engineering

Images