A kind of reinforced anchor rod and rock mass reinforcement method using the same

Abstract

The invention relates to a reinforcement anchor rod which comprises an anchor rod body, wherein a thread tightly meshed with a rock mass is formed on the outer side surface of the anchor rod body; an axial grouting channel for grouting slurry and enabling the slurry to flow into a drilled hole of the drilled rock mass is formed in the anchor rod body; a stop plug for stopping the slurry in the drilled hole is arranged on the anchor rod body. The invention also relates to a rock mass reinforcement method applying the anchor rod. The rock mass reinforcement method comprises the steps of respectively punching the anchor rods into intersections of cracks of the rock mass and the tail ends of all the cracks, extracting air from the anchor rods at the intersections of the cracks, grouting the slurry into anchor rods at the tail ends of the cracks, and respectively grouting the slurry into rock holes in which the anchor rod bodies are positioned after the cracks are filled with the slurry so as to reinforce the whole rock mass into a whole.

Description

technical field [0001] The invention relates to a reinforcing bolt used for reinforcing the wall surface of a rock mass structure. Background technique [0002] Bolts are mainly used to stabilize structures with internal cracks or cavities such as tunnels, flat tunnels or rock walls. By using the strength of the bolts to connect multiple independent rock blocks into a whole, the rock walls can be stable and strong. In the prior art, the method of grouting between the anchor rod and the drilled rock cave is also used to make the connection strength between the anchor rod and the rock block higher. However, the existing methods mostly use cement mortar for grouting. Due to the penetration of cement mortar In the grouting process, it is not easy to enter the rock gap. At the same time, in order to facilitate the grouting of cement mortar through the bolt, a large grouting gap is required inside the bolt, which reduces the strength of the bolt itself; on the other hand , the ex...

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Problems solved by technology

[0002] Bolts are mainly used to stabilize structures with internal cracks or cavities such as tunnels, flat tunnels or rock walls. By using the strength of the bolts to connect multiple independent rock blocks into a whole, the rock walls can be stable and strong. In the prior art, the method of grouting between the anchor rod and the drilled rock cave is also used to make the connection strength between the anchor rod and the rock block higher. However, the existing methods mostly use cement mortar for grouting. Due to the penetration of cement mortar In the grouting process, it is not easy to enter the rock gap. At the same time, in order to facilitate the grouting of cement mortar through the bolt, a large grouting gap is required inside the bolt, which reduces the strength of the bolt itself; on the other hand , the existing technology pays attention to the reinforcement of the rock mass structure by a single anchor and the grouting process, but does not study the grouting reinforcement process between the anchors, and obtains the strengthening method for the overall rock structure; the rock mass structure Cracks generally appear on the surface or inside, and such cracks often present a state where multiple cracks intersect; the existing technology mainly focuses on how to eliminate the cracks at a single bolt and reinforce the rock mass at that place. However, when multiple cracks intersect When it occurs, using a single anchor rod to reinforce each crack separately cannot achieve a good effect, and some cracks may not be completely filled by grout, which may cause safety hazards. Therefore, it is necessary to use the grouting reinforcement method associated with the anchor rods

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