Anchor rod construction device and construction method

Abstract

The present invention relates to the technical field of anchor bolt construction, and specifically discloses an anchor bolt construction device and a construction method, comprising a jack and a hydraulic pump for supplying oil to the jack, wherein a fixing device is installed at one end of the jack away from the anchoring surface, and the fixing device comprises: a connecting sleeve fixedly connected to the driving end of the jack; at least three groups of wire clamping assemblies, the wire clamping assembly comprises an intermediate block and a clamping block group, the intermediate block is installed in the connecting sleeve and can slide along the radial direction of the connecting sleeve, the clamping block group comprises an inner clamping block and an outer clamping block which are horizontally slidably matched, a clamping hole which can be butted together is provided between the inner clamping block and the outer clamping block, and when a plurality of anchor bolts are subjected to pull-out detection, since the center of the arc slideway is eccentrically arranged with the connecting sleeve, the clamping block group slides along the arc slideway to make the clamping hole approach or move away from the center of the connecting sleeve, and adaptive adjustment is performed according to the distance between the anchor bolts.

Description

Technical Field

[0001] The invention relates to the technical field of anchor rod construction, and in particular to an anchor rod construction device and a construction method. Background Art

[0002] Slope engineering and mining engineering cannot be separated from the reinforcement of anchor rods (cables). With the rapid economic development today, the mining and utilization of minerals are particularly evident. In the past, mining was generally limited to shallow areas, so the geological environment was relatively simple. The current support technology meets safety needs. However, as mining enters deeper areas, the geological environment becomes harsher, the mechanical state becomes more complex, and the factors affecting safety increase, which is not conducive to safe production requirements. Therefore, the pull-out test of anchor rods is particularly important, which can test the overall performance of anchor rods.

[0003] A Chinese patent document with authorization announcement number CN113740164B discloses an anchor rod pulling device, which includes a jack mounted on the anchor rod and a hydraulic pump for supplying oil to the jack. A fixing device for fixing to the anchor rod is provided on the side of the jack away from the wall. The fixing device includes a fixing sleeve and a plurality of wedge blocks arranged in the fixing sleeve. The inner wall of the fixing sleeve gradually tilts inward along the direction of the jack. The wedge blocks clamp the anchor rod in the fixing sleeve. A connecting sleeve is provided on the side wall of the jack. One end of the connecting sleeve is fixedly connected to the fixing sleeve. The other end of the connecting sleeve is connected to an abutment plate. A push rod is hinged on the side wall of the jack. The push rod is inclined along the jack toward the abutment plate and abuts against the abutment plate. A trigger rod for pushing the push rod to close is passed through the side wall of the connecting sleeve. The trigger rod is slidably connected to the connecting sleeve.

[0004] When performing pull-out tests on existing anchor rods, there may be single anchor rod pull-outs and multiple anchor rod pull-outs. The spacing between multiple anchor rods may be different. Therefore, if the anchor rod fixed position of the fixing device remains unchanged, the anchor rod will be tilted, so there will be a large error in the force tested during the pull-out test. Summary of the invention

[0005] The present invention provides an anchor rod construction device and a construction method, aiming to solve the problem in the related art that when the anchor rod is tilted for pulling detection, the detected force has a large error.

[0006] An anchor bolt construction device and construction method, comprising a jack and a hydraulic pump for supplying oil to the jack, wherein a fixing device is installed at one end of the jack away from the anchoring surface, and the fixing device comprises:

[0007] A connecting sleeve, fixedly connected to the driving end of the jack;

[0008] At least three groups of wire clamping assemblies, the wire clamping assemblies include an intermediate block and a clamping block group, the intermediate block is installed in the connecting sleeve and can slide in the radial direction of the connecting sleeve, the clamping block group includes an inner clamping block and an outer clamping block that are horizontally slidably matched, a clamping hole that can be butted together is provided between the inner clamping block and the outer clamping block, anti-slip grooves are provided on the clamping surface of the intermediate block close to the axis of the connecting sleeve and in the clamping hole, the outer side surface of the intermediate block is arc-shaped and not coaxial with the axis of the connecting sleeve, the inner clamping block is slidably installed on the outer side surface of the intermediate block, an arc-shaped guide block coaxial with the outer side surface of the intermediate block is provided on the inner wall of the connecting sleeve, and the outer side surface of the outer clamping block is slidably connected with the arc-shaped guide block;

[0009] Internal insert bar: when the anchor rod is fixed in the clamping hole, the internal insert bar is inserted into the axis of the connecting sleeve, and the clamping hole clamps the anchor rod to prevent the intermediate block from sliding further;

[0010] There are the same number of outer inserts as the clamping holes. When the anchor rod is fixed between the intermediate blocks, the inner inserts are inserted into the clamping holes so that all the intermediate blocks clamp the anchor rod.

[0011] The effect is that when multiple anchor rods are pulled out for inspection, since the center of the arc slide is eccentrically set with respect to the connecting sleeve, the clamping block group slides along the arc slide to make the clamping hole approach or move away from the center of the connecting sleeve, so that the clamping block group is adaptively adjusted along the arc slide according to the distance of the anchor rods. When a single anchor rod is pulled out for inspection, after the anchor rod is inserted between the middle blocks, the inner insert strips are respectively inserted into the clamping holes, so that all the middle blocks clamp the anchor rods, while limiting the opening state of the clamping block group, so that the use state can be switched freely.

[0012] Preferably, guide rods are fixedly provided on the inner clamping block and the outer clamping block, and sliding holes matching with the guide rods are provided on the inner clamping block and the outer clamping block.

[0013] Preferably, an elastic member is provided between the inner clamping block and the outer clamping block for separating the two from each other in the horizontal direction, so that the inner clamping block and the outer clamping block are separated by a certain distance in the initial state, which facilitates the insertion of the anchor rod.

[0014] Preferably, a slideway is provided on the clamping hole and the clamping surface of the middle block, the top of the slideway extends to the top of the wire clamping assembly, the bottom of the slideway is closed, a clamping plate is installed in the slideway for sliding up and down, and anti-slip grooves are also provided on the clamping plate. By inserting clamping plates of different specifications, it can adapt to anchor rods of different thicknesses, and has a wide range of applications.

[0015] Preferably, it further comprises a mounting ring, the outer insert strip is slidably mounted on the mounting ring, and a through hole for the anchor rod to pass through is opened in the middle of the mounting ring, so as to facilitate the installation and removal of all the outer insert strips.

[0016] Preferably, an elastic sheet is provided in the through hole to prevent the mounting ring from being pulled out of the anchor rod.

[0017] Preferably, a slide groove having the same sliding track as the clamping block group is provided on the mounting ring, and the outer insert strip is slidably installed in the slide groove, so that the distance between the outer insert strips can be adjusted conveniently according to the distance between the anchor rods.

[0018] An anchor rod construction method utilizes the above-mentioned anchor rod construction device to measure the anchoring force of the anchor rod after the anchor rod is installed.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0020] When multiple anchor rods are pulled out for testing, after the anchor rods are inserted into the clamping holes, the inner insert strips are inserted into the axis of the connecting sleeve so that the inner insert strips are butted against the clamping surface of the middle block, thereby bringing the two halves of the clamping holes close to each other to clamp the anchor rods, and at the same time limiting the middle block, forming an arc-shaped slideway for the clamping block group to slide between the middle block and the arc-shaped guide block, and since the center of the arc-shaped slideway is eccentrically arranged with respect to the connecting sleeve, the clamping block group slides along the arc-shaped slideway to bring the clamping holes close to or away from the center of the connecting sleeve, and finally the jack is started to apply an upward force to the fixing device, thereby testing the anchoring force of multiple anchor rods, and thus, according to the distance between the anchor rods, before or during the process of pulling out the anchor rods, the clamping block group can be adaptively adjusted by moving along the arc-shaped slideway. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the fixing device of the present invention when fixing three anchor rods.

[0022] Figure 2 It is a schematic structural diagram of the fixing device of the present invention when fixing an anchor rod.

[0023] Figure 3 It is a schematic diagram of the exploded structure of the fixing device in the present invention.

[0024] Figure 4 It is a top view of the fixing device and the inner insert strip in the present invention when connected.

[0025] Figure 5 It is a top view of the fixing device in the initial state of the present invention.

[0026] Figure 6 It is a schematic structural diagram of the clamping block group in the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the clamping sheet in the present invention.

[0028] Reference numerals:

[0029] 1. Fixing device; 11. Connecting sleeve; 111. Limiting ring; 12. Intermediate block; 121. Sliding rod; 13. Clamping block group; 131. Inner clamping block; 132. Outer clamping block; 133. Clamping hole; 134. Elastic member; 14. Arc guide block; 15. Inner insert strip; 16. Outer insert strip; 161. Mounting ring; 162. Elastic sheet; 17. Clamping sheet; 2. Jack; 3. Pad; 4. Anchor rod. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] like Figure 1 and Figure 2 As shown, an anchor construction device includes a fixing device 1, a jack 2 and a hydraulic pump (not shown in the figure) for supplying oil to the jack 2. The fixing device 1 is installed at the end of the jack 2 away from the anchoring surface. When the anchor 4 is subjected to a pull-out test, the pad 3, the jack 2 and the fixing device 1 are sequentially sleeved on the anchor 4, so that one end of the jack 2 abuts against the pad 3, and the other end of the jack 2 abuts against the fixing device 1, and then the jack 2 is supplied with oil through the hydraulic pump, and the jack 2 continuously applies force to the fixing device 1, thereby performing a pull-out test on the anchor 4.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, the fixing device 1 includes a connecting sleeve 11, at least three sets of wire clamping assemblies (described below as three examples), an arc guide block 14, an inner insert bar 15 and an outer insert bar 16, and the connecting sleeve 11 is fixedly connected to the driving end of the jack 2;

[0033] like Figure 3 and Figure 4 As shown, the wire clamping assembly includes an intermediate block 12 and a clamping block group 13. The intermediate block 12 is slidably installed in the connecting sleeve 11 through a sliding rod 121 and can slide along the radial direction of the connecting sleeve 11;

[0034] like Figure 5 and Figure 6As shown, the clamping block group 13 includes an inner clamping block 131 and an outer clamping block 132 that are horizontally slidably matched, a clamping hole 133 that can be butted together is provided between the inner clamping block 131 and the outer clamping block 132, anti-slip grooves (not shown in the figure) are provided on the clamping surface of the intermediate block 12 close to the axis of the connecting sleeve 11 and in the clamping hole 133, and guide rods are fixedly provided on the inner clamping block 131 and the outer clamping block 132, and sliding holes that match the guide rods are provided on the inner clamping block 131 and the outer clamping block 132, and an elastic member 134 (preferably a spring sheet) is provided between the inner clamping block 131 and the outer clamping block 132 for separating the two from each other in the horizontal direction, so that the inner clamping block 131 and the outer clamping block 132 are separated by a certain distance in the initial state, so as to facilitate the insertion of the anchor rod 4;

[0035] like Figure 3 and Figure 4 As shown, the outer side surface of the intermediate block 12 is arc-shaped and is not coaxial with the axis of the connecting sleeve 11, the inner clamping block 131 is slidably mounted on the outer side surface of the intermediate block 12, the arc-shaped guide block 14 is fixedly mounted on the inner wall of the connecting sleeve 11 and is coaxial with the outer side surface of the intermediate block 12, and the outer side surface of the outer clamping block 132 is slidably connected with the arc-shaped guide block 14, so that an arc-shaped slideway for the clamping block group 13 to slide is formed between the intermediate block 12 and the arc-shaped guide block 14;

[0036] like Figure 1 , Figure 3 and Figure 4 As shown, when the three anchor rods 4 are subjected to a pull-out test, after the anchor rod 4 is inserted into the clamping hole 133, the inner insert strip 15 is inserted into the axis of the connecting sleeve 11, so that the inner insert strip 15 abuts against the clamping surface of the middle block 12, so that the two halves of the clamping hole 133 are close to each other to clamp the anchor rod 4, and at the same time, the middle block 12 is limited, and an arc-shaped slideway for the clamping block group 13 to slide is formed between the middle block 12 and the arc-shaped guide block 14. Since the center of the arc-shaped slideway is eccentrically arranged with the connecting sleeve 11, the clamping block group 13 slides along the arc-shaped slideway to make the clamping hole 13 close to or away from the center of the connecting sleeve 11, so that according to the distance between the three anchor rods 4, the clamping block group 13 moves along the arc-shaped slideway for adaptive adjustment, and finally the jack 2 is started to apply an upward force to the fixing device 1, so as to detect the anchoring force of the three anchor rods 4;

[0037] like Figure 2 and Figure 5 As shown, when a single anchor rod 4 is subjected to a pull-out test, after the anchor rod 4 is inserted between the intermediate blocks 12 , three inner insert bars 15 are respectively inserted into the three clamping holes 133 , so that all the intermediate blocks 12 clamp the anchor rod 4 , while limiting the opening state of the clamping block group 13 .

[0038] like Figure 3 and Figure 4As shown, the connecting sleeve 11 includes an inner cylinder and two limiting rings 111, and a plurality of mounting grooves are provided on the inner wall of the inner cylinder. The outer end of the slide rod 121 is fixedly connected with a connecting strip, and the outer sides of the connecting strip and the arc guide block 14 are provided with mounting strips adapted to the mounting grooves, so that the connecting strip and the mounting strip on the arc guide block 14 can be inserted into the mounting grooves, and then the connecting strip and the arc guide block 14 are slid into the inner cylinder, and finally the limiting rings 111 are fixedly installed at both ends of the inner cylinder, thereby completing the installation of the slide rod 121 and the arc guide block 14.

[0039] like Figure 2 and Figure 3 As shown, in order to facilitate the installation of the external insert 16, a mounting ring 161 is provided, and a sliding groove with the same sliding track as the clamping block group 13 is opened on the mounting ring 161, and the external insert 16 is slidably installed in the sliding groove. A through hole for the anchor rod 4 to pass through is opened in the middle of the mounting ring 161, and an elastic sheet 162 is arranged in the through hole to prevent the mounting ring 161 from being pulled out of the anchor rod 4. When the mounting ring 161 is passed through the anchor rod 4, the external insert 16 is inserted into the clamping hole 133. Since the elastic sheet 162 prevents the mounting ring 161 from moving in the opposite direction relative to the anchor rod 4, it can prevent the external insert 16 from falling off, so it is convenient to use it inverted. After the inspection is completed, the elastic sheet 162 is moved so that it does not contact the anchor rod 4, thereby removing the mounting ring 161.

[0040] In order to adapt to anchor rods 4 of different thicknesses, the clamping hole 133 and the clamping surface of the intermediate block 12 are provided with a slideway, the top of the slideway extends to the top of the clamping assembly, the bottom of the slideway is closed, and a clamping piece 17 (such as Figure 7 As shown), the clamping piece 17 is provided with anti-slip grooves, and the anchor rods 4 of different thicknesses can be adapted by inserting clamping pieces 17 of different specifications.

[0041] An anchor rod construction method comprises the following steps:

[0042] S1. Drilling holes in rock and soil;

[0043] S2. Use high-pressure air or water to clean the hole;

[0044] S3, insert the anchor rod 4 into the hole;

[0045] S4, inject cement mortar into the hole;

[0046] S5. After grouting is completed, maintenance is carried out;

[0047] S6. Perform a pull-out test on the anchor rod 4.

[0048] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An anchor bolt construction device, comprising a jack and a hydraulic pump for supplying oil to the jack, wherein a fixing device is installed at one end of the jack away from the anchoring surface, and characterized in that: The fixing device comprises: A connecting sleeve, fixedly connected to the driving end of the jack; At least three groups of wire clamping assemblies, the wire clamping assemblies include an intermediate block and a clamping block group, the intermediate block is installed in the connecting sleeve and can slide in the radial direction of the connecting sleeve, the clamping block group includes an inner clamping block and an outer clamping block that are horizontally slidably matched, a clamping hole that can be butted together is provided between the inner clamping block and the outer clamping block, anti-slip grooves are provided on the clamping surface of the intermediate block close to the axis of the connecting sleeve and in the clamping hole, the outer side surface of the intermediate block is arc-shaped and not coaxial with the axis of the connecting sleeve, the inner clamping block is slidably installed on the outer side surface of the intermediate block, an arc-shaped guide block coaxial with the outer side surface of the intermediate block is provided on the inner wall of the connecting sleeve, and the outer side surface of the outer clamping block is slidably connected with the arc-shaped guide block; Internal insert bar: when the anchor rod is fixed in the clamping hole, the internal insert bar is inserted into the axis of the connecting sleeve, and the clamping hole clamps the anchor rod to prevent the intermediate block from sliding further; There are the same number of outer inserts as the clamping holes. When the anchor rod is fixed between the intermediate blocks, the inner inserts are inserted into the clamping holes so that all the intermediate blocks clamp the anchor rod.

2. The anchor construction device according to claim 1, characterized in that: The inner clamping block and the outer clamping block are both fixedly provided with guide rods, and the inner clamping block and the outer clamping block are both provided with sliding holes matched with the guide rods.

3. The anchor construction device according to claim 2, characterized in that: An elastic member is arranged between the inner clamping block and the outer clamping block to separate the inner clamping block and the outer clamping block from each other in the horizontal direction.

4. The anchor construction device according to claim 3, characterized in that: The clamping hole and the clamping surface of the middle block are both provided with slideways, the top of which extends to the top of the wire clamping assembly, and the bottom of which is closed. A clamping sheet is installed in the slideway for sliding up and down, and anti-slip grooves are also provided on the clamping sheet.

5. The anchor construction device according to claim 1, characterized in that: It also comprises a mounting ring, the outer inserting strip is slidably mounted on the mounting ring, and a through hole for the anchor rod to pass through is opened in the middle of the mounting ring.

6. The anchor construction device according to claim 5, characterized in that: An elastic sheet is arranged in the through hole to prevent the mounting ring from being pulled out of the anchor rod.

7. The anchor construction device according to claim 6, characterized in that: The mounting ring is provided with a sliding groove which is the same as the sliding track of the clamping block group, and the outer insert strip is slidably mounted in the sliding groove.

8. An anchor construction method, characterized in that: By using the anchor construction device as described in any one of claims 1 to 7, the anchoring force of the anchor is measured after the anchor is installed.

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