CN201121522Y - Squeeze Anchor Bolt - Google Patents

Abstract

A squeeze-injection anchor barrel type anchor rod, which includes an anchor rod body, a grouting inner pipeline is arranged at the axial center of the anchor rod body, and a plurality of grouting pipes communicating with the grouting inner pipeline are spaced apart from the anchor rod body. An eye hole; a frustum-shaped flexible sealing pad is provided at the rear end of the anchor rod body, and a tray is provided on the end face of the frustum-shaped flexible sealing pad, and a nut for fixing the tray is provided. The squeeze-injection anchor barrel-type bolt cancels the resin coil, which not only changes the anchoring form of the bolt, but also mobilizes the bearing capacity of the broken surrounding rock around the roadway in a large range. The broken surrounding rock consolidates and bears the load, and plays the role of strengthening the loose and cracked rock mass. The anchorability is stronger, the anchoring force is greater, the anchor rod and the grout realize the anchor tube effect; the grout does not overflow, the grouting effect is good, and the anchoring strength is high.

Description

Squeeze Anchor Bolt

technical field

The utility model relates to a squeeze-injection anchor barrel type anchor rod, which is especially suitable for the support for the repair and reinforcement of mining shafts and lanes, and is also suitable for other projects requiring anchor support.

Background technique

Loose and broken rock masses are very common in original natural conditions or affected by engineering disturbances. However, in the loose and broken rock mass, the anchorability of the anchor rod is very poor, resulting in poor bolt support effect, which leads to the failure of effective reinforcement and stability control of the rock mass. If full-length anchoring is used, stirring anchoring has great limitations and disadvantages, such as high resistance, which cannot achieve full-length anchoring; at the same time, it is greatly affected by the quality of the hole wall, and the rod body has a "glove effect" in the hole wall, leaving a gap to cause anchoring Untrue or even anchored. The commonly used anchor injection technology is to inject cement slurry into the cracked rock mass through the grouting anchor rod. The cohesive force of the cement slurry is very low and unreliable, and the cementation radius is usually only about 20mm.

Utility model content

The purpose of the utility model is to provide a squeeze anchor barrel type anchor rod with reasonable structure, small resistance, high bearing capacity, and convenient grouting and support.

The squeeze-injection anchor cylinder type anchor rod of the utility model comprises an anchor rod body, and a grouting inner pipeline is arranged at the axial center of the anchor rod body, and a plurality of pipes communicating with the grouting inner pipeline are spaced apart on the anchor rod body. Grouting holes; the back end of the bolt body is provided with a circular frustum-shaped flexible sealing pad, and the end face of the circular frustum-shaped flexible sealing pad is provided with a tray and a nut for fixing the tray.

The anchor rod body is made of threaded steel pipe; the frustum-shaped flexible sealing pad is made of rubber.

The utility model constructs eyeholes in broken or relatively broken surrounding rocks, which are processed by threaded steel pipes. The chemical consolidation material passes through the small hole in the center of the rod body, squeezes and penetrates into the loose and broken surrounding rocks, and realizes the threaded rod body and the rod-shaped object. The bonding of the surrounding rock replaces the anchoring of the resin medicine roll, and consolidates the broken surrounding rock around the rod body to form a cylindrical bearing ring along the axial direction of the rod body. This kind of squeeze-injection anchor-type bolt cancels the resin coil, which not only changes the anchoring form of the bolt, but also mobilizes the bearing capacity of the broken surrounding rock around the roadway in a large range, so that a large range of broken surrounding rock can be consolidated and carried , play the role of reinforcing loose and cracked rock mass. The cementing radius reaches about 300mm. As long as the parameters of the anchor shaft are properly selected, all the loose and broken surrounding rock media around the roadway can be consolidated to form a load-bearing structure with excellent overall performance and certain stability, which can be used for mining well roadway support Protection, geotechnical engineering reinforcement, slope reinforcement.

Description of drawings:

Accompanying drawing is the structural representation of the utility model.

In the figure: 1-anchor rod body, 2-grouting eye, 3-grouting inner pipeline, 4-round frustum-shaped flexible sealing pad, 5-tray, 6-nut.

Detailed ways

The utility model will be further described below in conjunction with the embodiment in the accompanying drawings:

As shown in the accompanying drawings, the threaded steel pipe is used to process a new squeeze-injection anchor barrel type anchor rod. The axial center of the anchor rod body 1 is provided with a grouting inner pipeline 3, and the anchor rod body 1 is spaced apart from a plurality of grouting pipes. The grouting hole 2 connected by the inner pipeline 3; the back end of the anchor rod body 1 is provided with a conical flexible sealing pad 4, and the end face of the conical flexible sealing pad 4 is provided with a tray 5 and a fixed tray 5 The nut6. The grout reverse blocking function is realized, so that the grout does not overflow, and the grouting effect can be guaranteed.

Working principle: The consolidation material penetrates into the broken surrounding rock through the grouting hole 2 on the bolt body 1, and consolidates the broken surrounding rock around the bolt body 1 to form a The cylindrical bearing ring of the anchor rod not only enhances the overall stability of the rod body against compression and shear, but also enables the loose medium around the anchor rod to be anchored; at the same time, the anchoring effect of the anchor rod itself remains unchanged. The consolidated surrounding rock acts as a good anchoring pre-tightening force. Squeeze-injection anchor barrel type bolt not only changes the anchoring form of the bolt, but also cancels the resin coil, mobilizes the bearing capacity of the broken surrounding rock around the roadway in a large range, and makes a large range of broken surrounding rock consolidate and bear. As long as the parameters of the anchor shaft are properly selected, all the loose and broken surrounding rock media around the roadway can be consolidated to form a small load-bearing structure with an internal strong support body that has excellent overall performance and can maintain a certain structural stability.

Claims (3)

1. A squeeze-injection anchor barrel type bolt, which comprises a bolt body (1), is characterized in that: an inner pipeline (3) for grouting is provided at the axial center of the bolt body (1), and the bolt body ( 1) There are a plurality of grouting holes (2) connected to the grouting inner pipeline (3) at intervals; a conical flexible sealing pad (4) is provided at the rear end of the bolt body (1), and the cone The end face of the shaped hole sealer (4) is provided with a tray (5), and is provided with a nut (6) for fixing the tray (5). 2. The squeeze anchor cylinder type anchor rod according to claim 1, wherein the physical feature is that: the anchor rod body (1) is made of threaded steel pipe. 3. The squeeze anchor barrel type anchor rod according to claim 1, wherein the characteristic is that the flexible sealing pad (4) in the shape of a truncated cone is made of rubber.

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