CN205329688U - Resistance -increasing slip casting stock - Google Patents

Abstract

The utility model discloses a resistance-increasing grouting bolt, which belongs to the field of bolt support. The utility model comprises an anchor rod body, a nut, a backing plate, a slurry stopper and two kinds of steel hinge systems. The two steel hinge systems are connected by a pull rod (4), and the tail of the pull rod is fixed by a pull rod nut (2). Put the anchor rod in the drill hole, pull the pull rod (4), under the horizontal force of the pull rod, the upper link (10) and the lower link (11) of the steel hinge rotate around the rotation axis (12), and directly move the upper and lower two The wing plate (13) is held up to form an expanded stent system. The steel hinge system at the top of the anchor rod is under the force of the pull rod, and the upper and lower connecting rods move along the slideway to expand the two connecting rods. The pull rod is fixed by the pull rod nut and grouted through the central grouting channel. The barb (9) and the connecting rod on the wing plate increase the contact area between the anchor rod, the rock mass and the cement slurry, and provide sufficient pull-out resistance. The utility model has simple operation and convenient construction, and the two kinds of steel hinge systems enhance the coagulation effect on surrounding rocks.

Description

A resistance-increasing grouting anchor

technical field

The utility model relates to the field of geotechnical engineering support structures, in particular to a drag-increasing grouting anchor rod.

Background technique

In the construction process of tunnels, water conservancy, mine roadways and other fields, bolts have become the most widely used support equipment. The traditional grouting bolt is made into the shape of equal cross-section, and the pull-out force is mainly provided by the anchor body and rock-soil body. The damping force of the bolt is not enough, and the force is relatively small under normal circumstances, which cannot meet the needs of the project. Especially in areas with poor geological conditions, the anchoring effect is not ideal.

Contents of the invention

Aiming at the deficiencies in the above technologies, the purpose of this utility model is to provide a drag-increasing grouting anchor that is easy to operate, convenient and fast.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a drag-increasing grouting anchor rod, including an anchor rod body, a nut, a backing plate, a grout stopper and two steel hinge systems. The anchor rod body includes a central grouting channel, the rear end of the anchor rod body is fastened to the backing plate through a fastening nut, a grout stopper is installed on the anchor rod body near the backing plate, and a grout stopper is installed on the anchor rod body There are a plurality of grouting holes communicating with the central grouting channel. The two steel hinge systems are connected by a tie rod. When the anchor rod is placed in the drill hole, a horizontal force is applied to pull the tie rod. Driven by the tie rod, the upper and lower connecting rods of the steel hinge rotate around the rotation axis, and directly move the upper and lower wings. The plate is held up to form an expanded stent system. There are barbs on the wing plate, which can directly extend into the soil body, increasing the anchoring force. The steel hinge system on the top of the anchor rod is under the force of the tie rod, and the upper and lower connecting rods move along the slideway, so that the two connecting rods are opened. After pouring concrete, the contact area between the anchor rod, the rock mass and the cement slurry is increased, providing Sufficient pull-out resistance.

The curvature of the wing plate is consistent with that of the anchor rod body, and the wing plate is close to the surface of the anchor rod body.

Barbs are provided on the wing plate to increase the damping force of the anchor rod.

The steel hinge system at the top of the anchor rod, under the force of the pull rod, the upper and lower connecting rods are stretched along the slideway.

The pull rod is fixed by the tail rod nut.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a schematic diagram of cooperation between the wing plate and the connecting rod of the present invention.

Fig. 3 is a structural schematic diagram of the steel hinge at the top of the utility model.

Fig. 4 is a schematic sectional view of A-A of the utility model.

The meaning of each label in the figure is: 1-bolt body, 2-tie rod nut, 3-nut, 4-tie rod, 5-backing plate, 6-stop grouting plug, 7-grouting hole, 8-central grouting channel , 9-barb, 10-upper connecting rod, 11-lower connecting rod, 12-rotary shaft, 13-wing plate, 14-upper fixed shaft, 15-lower fixed shaft, 16-upper slideway, 17-glideway.

detailed description

Below in conjunction with accompanying drawing and embodiment the concrete content of the present utility model is described in further detail.

Example 1:

As shown in Figure 1, it is a schematic diagram of the overall structure of the utility model. The utility model discloses a resistance-increasing grouting anchor rod. The utility model comprises an anchor rod body, a nut, a backing plate, a grout stopper and two kinds of steel hinge systems. The anchor rod body includes a central grouting channel 8 and is provided with a plurality of grouting holes 7 communicating with the central grouting channel. The two steel hinge systems are connected by a pull rod 4, and the pull rod is fixed by a pull rod nut 2 at the tail. Put the anchor rod in the drill hole, pull the pull rod 4, under the horizontal force of the pull rod, the upper link 10 and the lower link 11 of the steel hinge rotate around the rotation axis 12, and directly hold up the upper and lower wings 13 to form an expansion joint. bracket system. The steel hinge system on the top of the anchor rod is under the force of the pull rod, and the upper and lower connecting rods expand along the slideway. After the tie rod is fixed by the tie rod nut, it is grouted through the central grouting channel. The barb 9 on the wing plate and the connecting rod increase the contact area between the anchor rod, the rock mass and the cement slurry, and provide sufficient pull-out resistance.

Example 2:

As shown in Figure 2, it is a schematic diagram of the cooperation between the wing plate and the connecting rod of the present invention. The horizontal pulling force acts on the pull rod 4, and the upper and lower connecting rods rotate around the rotating shaft 12. The connecting rods are directly connected to the wing plates, and directly hold up the upper and lower two wing plates 13 to form an expansion support system. There are barbs on the wing plate, which can directly penetrate into the soil and be closely combined with the surrounding rock, increasing the contact area with the surrounding rock.

Example 3:

Figure 3 is a schematic diagram of the steel hinge structure at the top of the utility model. Under the action of the horizontal pulling force of the tie rod, the upper and lower connecting rods expand along the slideway, which increases the contact area between the anchor rod, the rock mass and the cement slurry, and increases its pull-out resistance. The outside of the fixed shaft is in the shape of a round cake to prevent the connecting rod from falling off.

Example 4:

As shown in Figure 4, it is a schematic cross-sectional view of the utility model A-A. The horizontal pulling force acts on the pull rod 4, and the upper and lower connecting rods rotate around the rotating shaft 12, and the connecting rods are directly connected with the wing plates to directly lift the upper and lower two wing plates 13. The curvature of the wing plate 13 is consistent with that of the anchor rod body, and the wing plate is close to the surface of the anchor rod body. There are barbs on the wing plate, which can be directly penetrated into the soil and closely combined with the surrounding rock, increasing the contact area with the surrounding rock and increasing its pull-out resistance.

Claims (4)

1. A drag-increasing grouting anchor, including an anchor body, a nut, a backing plate, a grout stopper and two steel hinge systems, characterized in that the two steel hinge systems are connected by a pull rod (4), and the pull rod is pulled by a horizontal force (4), the upper and lower two connecting rods of the steel hinge are rotated around the rotating shaft (12), and the upper and lower two wing plates (13) are directly lifted up, and the wing plates are provided with barbs (9). 2. A resistance-increasing grouting anchor according to claim 1, characterized in that the curvature of the wing plate (13) is consistent with that of the anchor body, and the wing plate is close to the surface of the anchor body. 3. A resistance-increasing grouting anchor according to claim 1, characterized in that the upper and lower connecting rods of the top steel hinge system expand along the upper slideway (16) and the lower slideway (17). 4. A drag-increasing grouting anchor according to claim 1, characterized in that the tie rod (4) is fixed by the tail tie rod nut (2).