Actively repairable earthquake-resistant anchor rod and application method thereof

Abstract

The present invention relates to an actively repairable earthquake-resistant anchor rod and an application method thereof, comprising an anchor rod body, wherein a plurality of hot melt strips are arranged at intervals along the length direction of the anchor rod body on the outer surface thereof, the hot melt strips are attached to the anchor rod body and an electric heating coil is arranged around the outer periphery of the assembly, a gasification expansion bag is arranged on the surface of the anchor rod body at the lower end of the hot melt strip, the inner end of the anchor rod body is inserted into the anchor hole, the outer end is fastened to the tray via a nut, an electromagnetic heating controller connected to the electric heating coil is fixed to the outer end of the anchor rod body, after the structure of the anchor body is damaged, the hot melt strips are melted by heating, penetrate into and fill the cracks around the anchor rod body, and the broken anchor body is re-bonded, thereby restoring the anchoring force.

Description

Technical Field

[0001] The invention relates to an anti-seismic anchor rod capable of active repair and an application method thereof. Background Art

[0002] Anchor support can change the mechanical properties of surrounding rock, achieve good support effects, and bring technical and economic benefits that traditional support methods cannot match. With the continuous development and improvement of anchor support theory, anchor support technology has also been gradually improved and enhanced, and has received widespread attention at home and abroad and has been widely used in geotechnical engineering and other underground engineering fields.

[0003] my country is a country prone to earthquakes. Earthquakes often damage anchoring agents and reduce the support effect of anchor rods. When the earthquake intensity is high, the fractured rock mass will produce shear dislocation at the fracture position, causing the anchoring agent of the traditional anchor rod to break and damage. On the one hand, it will directly reduce the anchoring force; on the other hand, after the anchoring agent is damaged, the groundwater in the fracture will directly contact the anchor rod, causing the traditional anchor rod to age and corrode rapidly, thus losing its anchoring effect.

[0004] At present, the main principle of anchor bolt anti-corrosion is isolation and insulation. Commonly used measures include: casing coating, coating isolation, surface cathodic protection, etc. However, adding casing or coating on the surface will affect the holding force of the anchor bolt. Cathodic protection will greatly increase its cost, and there is a limit on the length of the anchor bolt, and the long-term maintenance cost is high. Summary of the invention

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an actively repairable seismic anchor rod and an application method thereof, which is not only simple in structure but also stable and convenient.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: an actively repairable seismic resistant anchor rod, comprising an anchor rod body, a plurality of hot melt strips are arranged on the outer surface of the anchor rod body at intervals along its length direction, the hot melt strips are attached to the anchor rod body and an electric heating coil is arranged around the outside of the assembly, a gasification expansion bag is provided on the surface of the anchor rod body at the lower end of the hot melt strip, the inner end of the anchor rod body is inserted into the anchor hole, the outer end is fastened to the tray by a nut, and an electromagnetic heating controller connected to the electric heating coil is fixed to the outer end of the anchor rod body.

[0007] Furthermore, the gasification expansion bladder includes an expansion bladder shell and a heated gasifiable material filled inside the shell.

[0008] Furthermore, after the anchor rod body is inserted into the anchor hole, it is filled with an anchoring agent and solidified to form an anchor body, and the anchor body wraps the hot melt strip, the gasification expansion bag, and the electric heating coil inside to position it.

[0009] Furthermore, a pressure sensor is provided in the hot melt strip, which can test the pressure of the liquid under the action of the expansion bag of the gasification expansion bag after the hot melt strip is melted. The test signal is transmitted by the wire. According to the pressure sensor reading and the expansion characteristics of the heated expandable / gasified material, it can be intelligently determined whether there are cracks in the anchor body, thereby providing a basis and guidance for anchor repair.

[0010] Furthermore, a moisture sensor is fixedly provided on the anchor rod body. When the anchor body around the anchor rod body cracks and moisture contacts the anchor rod body, the moisture sensor sends a signal. After receiving the signal, the anchor rod body is heated by the electromagnetic heating controller and the electromagnetic heating coil.

[0011] Furthermore, the hot melt strip material is selected from low melting point metal materials, such as tin metal.

[0012] An application method of an actively repairable earthquake-resistant anchor rod is carried out according to the following steps: S1: drilling an anchor hole in a rock mass to be supported, wherein the diameter of the anchor hole is larger than the diameter of a composite body of an anchor rod, a hot melt strip and an electric heating coil; S2: anchoring the composite body of an anchor rod, a hot melt strip and an electric heating coil in the anchor hole by means of an anchoring agent, and forming an anchor body after the anchoring agent solidifies; S3: fixing the exposed end of the anchor rod by means of a nut and a tray, and completing the preliminary installation of the anchor rod; S4: after an earthquake causes the anchoring agent of the anchor rod to rupture at a rock mass fissure position, the electromagnetic heating coil is controlled by an electromagnetic heating controller to heat the anchor rod body, and the heat of the anchor rod body is transferred to the hot melt strip to melt the hot melt strip, and the melted material fills the broken area of ​​the anchoring agent.

[0013] Furthermore, if the cracked area of ​​the anchor body is located on the upper part of the hot melt strip, the hot melt strip cannot flow upward after melting. At this time, the gasification expansion bag can be expanded to squeeze it upward into the broken anchor body.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the hot melt strip is melted by electric heating, penetrates into and fills the cracks around the anchor body; on the one hand, the broken anchor body is re-bonded to restore the anchoring force; on the other hand, groundwater and air are prevented from contacting the anchor rod, thereby preventing local corrosion of the anchor rod; and if the cracked area of ​​the anchor body is located on the upper part of the hot melt strip, the hot melt strip cannot flow upward after melting, and at this time the gasification expansion bag can be expanded to squeeze it upward into the broken anchor body, with low maintenance costs.

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 A longitudinal cross-sectional schematic diagram of an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of a cross section of an embodiment of the present invention.

[0019] In the figure: 1-anchor rod body; 2-nut; 3-tray; 4-anchoring agent; 5-hot melt strip; 6-electric heating coil; 7-electromagnetic heating controller; 8-gasification expansion bag; 9-rock mass to be supported; 10-anchor hole. DETAILED DESCRIPTION

[0020] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0021] like Figures 1 to 3 As shown, an actively repairable earthquake-resistant anchor rod comprises an anchor rod body 1, a plurality of hot melt strips 5 are arranged at intervals on the outer surface of the anchor rod body along the length direction, the hot melt strips are attached to the anchor rod body and an electric heating coil 6 is arranged around the outer periphery of the assembly, a gasification expansion bag 8 is arranged on the surface of the anchor rod body at the lower end of the hot melt strip, the inner end of the anchor rod body is inserted into the anchor hole 10, the outer end is fastened to the tray 3 by a nut 2, and an electromagnetic heating controller 7 connected to the electric heating coil is fixed to the outer end of the anchor rod body.

[0022] In an embodiment of the present invention, the gasification expansion bladder comprises an expansion bladder shell and a heated gasifiable material filled therein.

[0023] In the embodiment of the present invention, the anchor rod body is inserted into the anchor hole and then filled with the anchoring agent 4 and solidified to form an anchor body, in which the hot melt strip, the gasification expansion bag and the electric heating coil are wrapped and positioned.

[0024] In the embodiment of the present invention, a pressure sensor (not marked in the drawings) is provided in the hot melt strip, which can test the pressure of the liquid under the action of the expansion bladder when the hot melt strip is melted and squeezed. The test signal is transmitted by a wire. According to the pressure sensor reading and the expansion characteristics of the heated expandable / gasified material, it can be intelligently determined whether there are cracks in the anchor body, thereby providing a basis and guidance for anchor repair.

[0025] In an embodiment of the present invention, a moisture sensor (not marked in the drawings) is fixedly provided on the anchor body. When the anchor body around the anchor body cracks and moisture contacts the anchor body, the moisture sensor transmits a signal. After receiving the signal, the anchor body is heated by the electromagnetic heating controller and the electromagnetic heating coil.

[0026] In the embodiment of the present invention, the hot melt strip material is a low melting point metal material, such as tin metal.

[0027] In an embodiment of the present invention, a method for determining whether cracks exist in a concrete structure is as follows: when the intelligent repair component is powered on and heated, the expansion bag expands; if the pressure sensor reading continues to increase with increasing temperature, it can be determined that the repair material has not seeped out and there are no cracks around the intelligent repair component; if the pressure sensor reading does not continue to increase with increasing temperature, it can be determined that the repair material can seep out and there are cracks around the intelligent repair component.

[0028] An application method of an actively repairable earthquake-resistant anchor rod is carried out in the following steps: S1: drilling an anchor hole in the rock mass to be supported, wherein the diameter of the anchor hole is larger than the diameter of the anchor rod body, the hot melt strip and the electric heating coil complex; S2: anchoring the anchor rod body, the hot melt strip and the electric heating coil complex in the anchor hole by means of an anchoring agent, and forming an anchor body after the anchoring agent solidifies; S3: fixing the exposed end of the anchor rod by means of a nut and a tray, and completing the preliminary installation of the anchor rod; S4: after the anchoring agent of the anchor rod breaks at the rock mass fissure position due to an earthquake, the electromagnetic heating coil is controlled by an electromagnetic heating controller to heat the anchor rod body, and the heat of the anchor rod body is transferred to the hot melt strip to melt the hot melt strip, and the melted material fills the broken area of ​​the anchoring agent.

[0029] In the embodiment of the present invention, if the cracked area of ​​the anchor body is located on the upper part of the hot melt bar, the hot melt bar cannot flow upward after melting. At this time, the gasification expansion bag can be expanded to squeeze it upward into the broken anchor body.

[0030] When an earthquake causes damage to the anchoring structure, electricity is applied to heat the structure and the hot-melt strip melts, seeping into and filling the cracks around the anchor rod. On the one hand, the broken anchor rod is re-bonded to restore the anchoring force. On the other hand, groundwater and air are prevented from contacting the anchor rod, thereby preventing local corrosion of the anchor rod. Based on the above two points, the new anchor rod has the characteristic of being able to be actively repaired after an earthquake.

[0031] The present invention is not limited to the above-mentioned best implementation mode. Anyone can derive other forms of active repairable earthquake-resistant anchor rods and their application methods under the inspiration of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims

1. An active repairable earthquake-resistant anchor, characterized in that: It includes an anchor rod body, and a plurality of hot melt strips are arranged at intervals on the outer surface of the anchor rod body along the length direction thereof. The hot melt strips are attached to the anchor rod body and an electric heating coil is arranged around the outside of the assembly. A gasification expansion bag is arranged on the surface of the anchor rod body at the lower end of the hot melt strip. The inner end of the anchor rod body is inserted into the anchor hole, and the outer end is fastened to the tray through a nut. An electromagnetic heating controller connected to the electric heating coil is fixed to the outer end of the anchor rod body.

2. The active repairable earthquake-resistant anchor according to claim 1, characterized in that: The gasification expansion bag comprises an expansion bag shell and a heated gasifiable material filled inside the expansion bag.

3. The active repairable earthquake-resistant anchor bolt according to claim 2, characterized in that: After the anchor rod body is inserted into the anchor hole, it is filled with an anchoring agent and solidified to form an anchor body, in which the hot melt strip, the gasification expansion bag and the electric heating coil are wrapped and positioned.

4. The active repairable earthquake-resistant anchor according to claim 1, characterized in that: A pressure sensor is arranged inside the hot melt strip.

5. The active repairable earthquake-resistant anchor according to claim 1, characterized in that: A moisture sensor is fixedly arranged on the anchor rod body.

6. The active repairable earthquake-resistant anchor bolt according to claim 1, characterized in that: The hot melt strip material is a low melting point metal material.

7. An application method of an active repairable earthquake-resistant anchor rod, characterized in that: An actively repairable earthquake-resistant anchor as described in any one of claims 1 to 6 is used, and the following steps are followed: S1: Anchor holes are drilled in the rock mass to be supported, wherein the diameter of the anchor holes is larger than the diameters of the anchor body, the hot melt bar and the electric heating coil complex; S2: The anchor body, the hot melt bar and the electric heating coil complex are anchored in the anchor hole by means of an anchoring agent, and an anchor body is formed after the anchoring agent solidifies; S3: The exposed end of the anchor is fixed by a nut and a tray to complete the preliminary installation of the anchor; S4: After the anchoring agent of the anchor is broken at the rock fissure position due to an earthquake, the electric heating coil is controlled by an electromagnetic heating controller to heat the anchor body, and the heat of the anchor body is transferred to the hot melt bar to melt the hot melt bar, and the melted material fills the broken area of ​​the anchoring agent.

8. The method for applying the actively repairable seismic anchor rod according to claim 7 is characterized in that: If the cracked area of ​​the anchor body is located on the upper part of the hot melt strip, the hot melt strip cannot flow upward after melting. At this time, the gasification expansion bag can be expanded to squeeze it upward into the broken anchor body.

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