A degassable anchor injection device for ordinary anchor rods and its application method

Abstract

The invention discloses a vented anchoring and grouting device for a common anchor rod and a using method thereof. The vented anchoring and grouting device includes an anchor rod, fastening nuts, a sealing washer, a venting grouting composite end socket, a tray, a venting grouting integrated pipe, an inflatable elastic grouting-stop plug, a guide protection cover, a sealing dustproof film, and ananchoring agent. According to the vented anchoring and grouting device for the common anchor rod, a venting passage and a grouting passage are separately arranged, and the venting grouting composite end socket is fixed in a borehole through the inflatable elastic grouting-stop plug; and according to the vented anchoring and grouting device for the common anchor rod and the using method thereof, inthe process of mounting the common anchor rod, by adding the device, a mounting hole can be directly used as a grouting hole for grouting without affecting normal pre-tightening force reinforcement of the common anchor rod, while a rock mass is reinforced, a common end socket anchoring anchor rod is changed to full length anchoring, the vented anchoring and grouting device solves the problems ofventing and plugging in the processes of anchoring and grouting support and grouting, the grouting effect is improved, and construction workload and the support cost of anchoring and grouting are reduced.

Description

technical field [0001] The invention relates to the field of bolt support and grouting reinforcement in tunnel engineering and tunnel engineering deformed roadway, in particular to an anchor grouting device for ordinary anchor rods that can be vented and a method for using the same. Background technique [0002] In shaft and tunnel engineering, the excavation of the roadway (tunnel) breaks the original stress balance of the surrounding rock, resulting in deformation of the roadway, which can be destroyed in severe cases. As an active support method, anchor rod and anchor cable support are widely used in coal mines, tunnels, foundation pits and other engineering fields because of their convenient construction, good support effect and significant economic benefits. For sections with weak rock mass that is seriously broken or with a large amount of water gushing, it is necessary to perform grouting reinforcement or grouting water blocking operations. After grouting, the surroun...

AI Technical Summary

Problems solved by technology

[0003] (1) In the traditional operation method, the conventional bolt support is carried out first, and then the grouted bolt is repaired for grouting. The construction process is complicated, the construction time is long, and the support cost is high. When the grouted bolt is installed later, the excavation is not carried out. head position, the distance from the top plate increases, increasing construction difficulty and work intensity

In addition, grouting anchors mostly use hollow rods, and there are often side openings on the rods. Due to cross-sectional defects, the strength of grouting anchors is often lower than that of ordinary anchors.

[0004] (2) Although some grouting devices can also grout in ordinary anchor holes, the gas blocked in the grouting hole cannot be effectively discharged during grouting

[0005] (3) The grout stopper used for plugging the anchor grouting hole is often installed under the anchor tray, and it is difficult to seal it again in time if there is a grout leakage during grouting

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