Built-in resin prestressed hollow anchor rod suitable for hole collapse geology

Abstract

The utility model discloses a built-in resin prestress hollow anchor rod suitable for hole collapse geology, which comprises an anchoring section rod body and a hollow rod body, an anchoring head is arranged at the front end of the anchoring section rod body, a resin anchoring agent is arranged in an inner cavity of the anchoring section rod body, and a plug is arranged at the tail end of the hollow rod body. A stop-grouting plug, a base plate, a spherical washer, a hexagon nut and a locking nut are sequentially arranged on the hollow rod body. The anchor rod has the self-locking and hole cleaning functions, and has the most remarkable characteristics that the anchor rod trolley can realize mechanical installation of the anchor rod in a hole collapse section, and the problems of the traditional built-in resin pre-stressed anchor rod when the traditional built-in resin pre-stressed anchor rod is installed in the hole collapse section are solved.

Description

Technical Field

[0001] The utility model relates to an anchor rod suitable for mechanized installation by an anchor rod trolley under hole collapse geological conditions. The anchor rod has a right-hand drilling, cleaning and slag removal function, can solve the problem that traditional built-in resin prestressed hollow anchor rods cannot be installed under hole collapse geological conditions, and is suitable for soft rock and hole collapse-prone surrounding rock in the field of traffic tunnels. Background Art

[0002] At present, anchor rods in good geological conditions have achieved mechanized construction using anchor rod trolleys, using prestressed anchor rods with built-in resin. However, for mechanized construction of anchor rods in poor geological conditions, there is a risk that small rocks and gravel such as rock and soil will easily collapse after the hole is formed, blocking the anchor hole. This prevents the anchoring agent and anchor rod from penetrating into the stable rock layer and playing their due reinforcement role, making it impossible to carry out mechanized construction of anchor rods in poor geological conditions.

[0003] At present, the manual installation of built-in resin prestressed anchor rods under adverse geological conditions has the following problems: 1. After the fine gravel in the anchor hole is removed, the size difference between the anchor hole and the anchor rod is too large, and the actual anchoring force often fails to meet the standard requirements; 2. The installation process relies on manual operation, which restricts the efficiency of support construction, and the anchor rod cannot be mechanized for construction; 3. If timely support is not provided during the initial stress release stage of rock excavation, there will be great safety hazards for personnel during the entire construction process. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the utility model proposes a built-in resin prestressed hollow anchor rod suitable for collapsed hole geology. The anchor rod has self-locking and hole cleaning functions. The most notable feature is that the anchor rod trolley can realize mechanized installation of anchor rods in collapsed hole sections, solving the problems faced by traditional built-in resin prestressed anchor rods when installing in collapsed hole sections.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a built-in resin prestressed hollow anchor rod suitable for collapsed hole geology, comprising an anchoring section rod body and a hollow rod body, an anchoring head is arranged at the front end of the anchoring section rod body, a resin anchoring agent is arranged in the inner cavity of the anchoring section rod body, a plug is arranged at the end of the hollow rod body, and a slurry stopper, a pad, a spherical washer, a hexagonal nut and a locking nut are arranged in sequence on the hollow rod body.

[0006] Furthermore, a connecting nut is arranged at the rear end of the anchoring section rod body, and the plug and the connecting nut form a self-locking function.

[0007] Furthermore, a guide cylinder is arranged at the end of the connecting nut.

[0008] Furthermore, the guide cylinder is welded to the end of the connecting nut.

[0009] Furthermore, the end face of the locking nut has an inclination angle.

[0010] Furthermore, a slurry outlet hole is arranged on the anchoring section rod body.

[0011] Furthermore, a pulp outlet hole is arranged on the hollow rod body.

[0012] Furthermore, the plug is a metal plug.

[0013] Furthermore, the metal plug is welded to the end of the hollow rod body.

[0014] Compared with the prior art, the positive effects of the utility model are:

[0015] The utility model can be equipped with an anchor trolley to realize mechanized construction in the collapsed hole section. See the following points for details:

[0016] 1. Possessing the foundation for mechanized construction: The anchor rod structure is designed according to automated equipment and processes. The resin anchor is integrated into the inner cavity of the anchor rod to reduce the installation time of the anchor on site. The anchor is pushed out of the inner cavity of the rod during the left-hand rotation process to meet the requirements of automated construction.

[0017] 2. Realize mechanized construction under poor geological conditions of hole collapse:

[0018] 1) The anchor rod of the utility model is equipped with a locking nut. The end face of the locking nut has a certain inclination angle. After being compressed, it will deflect to achieve self-locking, limit the movement of the hexagonal nut and form an interlocking, which can drive the rod body to rotate. In this way, the anchor rod can be pushed into the bottom of the hole while the rod body is rotated in the case of hole collapse.

[0019] 2) The anchor rod of the utility model has its own anchoring head, which can remove the collapsed rock and soil debris and prevent the rock and soil from entering the rod body, thus achieving the hole cleaning effect. After being pushed to the bottom of the hole, the anchoring head can effectively limit the rotation of the anchoring section rod body, so as to facilitate the subsequent introduction of the anchoring agent;

[0020] 3) A plug is welded at the end of the hollow rod body, which can limit the separation of the hollow rod body and the anchoring section rod body during the drilling and hole cleaning stage, and at the same time form a self-locking with the connecting nut to drive the rod body to rotate. The plug can also effectively prevent the damaged anchoring agent from flowing back into the inner cavity of the anchoring section rod;

[0021] 3. The guide tube welded to the end of the connecting nut can effectively "straighten" the posture of the anchor section rod body, making the anchor section rod body coaxial with the hollow rod body, which is convenient for the anchor trolley to find the hole and install it. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the process of crushing small rocks in the utility model;

[0025] Figure 3 This is a schematic diagram of the process of stirring the anchoring agent of the utility model.

[0026] Figure 4 It is a schematic diagram of the pre-tightening process of the utility model;

[0027] Figure 5 It is a schematic diagram of the grouting process of the utility model;

[0028] The reference numerals in the figure include: anchor head 1, resin anchor 2, anchor section rod body 3, metal plug 4, slurry outlet hole 5, connecting nut 6, guide tube 7, hollow rod body 8, slurry stop plug 9, pad 10, spherical washer 11, hexagonal nut 12, locking nut 13, outer hexagonal sleeve 14, rock and gravel 15, and inner sleeve 16. DETAILED DESCRIPTION

[0029] A hollow anchor rod with built-in resin prestress suitable for cave-in geology, the structure is as follows Figure 1 As shown, it includes: an anchor head 1, a resin anchor 2, an anchor section rod body 3, a metal plug 4, a slurry outlet hole 5, a connecting nut 6, a guide tube 7, a hollow rod body 8, a slurry stopper 9, a pad 10, a spherical washer 11, a hexagonal nut 12, and a locking nut 13, wherein:

[0030] An anchor head 1 is arranged at the front end of the anchor section rod body 3, which is used to crush and push away the collapsed rock and soil debris 15 and prevent the rock and soil debris from entering the interior of the rod body to achieve a hole cleaning effect. After being pushed to the bottom of the hole, the anchor head 1 can also effectively limit the rotation of the anchor section rod body 3 to facilitate the subsequent introduction of the resin anchor 2.

[0031] A resin anchoring agent 2 is set in the inner cavity of the anchoring section rod body 3. At the end of the hollow rod body 8 ( Figure 1 The metal plug 4 is welded to the left end (in the middle), which can limit the separation of the hollow rod body 8 and the anchoring section rod body 3 during the drilling and hole cleaning stage, and at the same time form a self-locking function with the connecting nut 6 to drive the rod body to rotate. The metal plug 4 can also effectively prevent the damaged resin anchor from flowing back into the inner cavity of the anchoring section rod body 3.

[0032] A guide cylinder 7 is welded at the end of the connecting nut 6, which can effectively "straighten" the posture of the anchor section rod body 3, so that the anchor section rod body 3 and the hollow rod body 8 are coaxial, which is convenient for the anchor trolley to find the hole for installation.

[0033] At the first end of the hollow rod body 8 ( Figure 1The locking nut 13 is provided at the right end (in the middle), and the end face of the locking nut has a certain inclination angle. After being compressed, it will deflect to achieve self-locking, limit the movement of the hexagonal nut 12 and form an interlocking, which can drive the rod body to rotate, so that the anchor rod can be pushed into the bottom of the hole while the rod body rotates in the case of hole collapse. The slurry outlet hole 5 is provided on the anchoring section rod body 3 and the hollow rod body 8.

[0034] The installation steps of the anchor rod are as follows:

[0035] Step 1: Install the assembled anchor rod body into the outer hexagonal sleeve 14 of the anchor rod trolley, drive the outer hexagonal sleeve of the anchor rod trolley to rotate clockwise, and drive the hexagonal nut 12 to rotate clockwise (the rod body is a left-handed thread) through the outer hexagonal sleeve, and press the end face of the locking nut 13 to form a self-locking drive with the locking nut to rotate the rod body. Since the plug 4 welded at the end of the hollow rod body can limit the rod body from being rotated out of the guide cylinder 7, the anchoring section rod body can be driven to rotate clockwise. At this time, the anchor head rotates clockwise to crush small rocks 15 and discharge the crushed rocks outward to achieve anchor hole cleaning. Figure 2 As shown;

[0036] Step 2: When the product is rotated clockwise to clean the hole to the bottom of the anchor hole, the inner sleeve 16 of the anchor trolley is driven to screw with the hollow rod body 8, and the hollow rod body is driven to rotate counterclockwise. Under the restriction of the anchor head 1, the anchor section rod body is stationary, and the hollow rod body is screwed in along the connecting nut 6. The plug 4 at the front end squeezes and pushes out the resin anchor 2. After it is completely pushed out, the rod body resists the anchor head. At this time, the equipment continues to rotate counterclockwise to drive the anchor section rod body 3 to rotate, so as to realize the stirring process of the anchor agent. Figure 3 As shown;

[0037] Step 3: After the anchoring agent solidifies, operate the inner sleeve of the anchor trolley to retract, and then pull the rod body outward to apply prestress. When the prestress meets the support requirements, drive the outer sleeve to rotate counterclockwise, so that the hexagonal nut is screwed into the rod body and pressed against the pad 10 to achieve the locking of the anchor prestress. Figure 4 As shown;

[0038] Step 4: The trolley pumps the premixed cement mortar into the inner hole of the hollow rod through the inner sleeve, and the mortar flows out from the slurry outlet hole 5 reserved at the end of the rod body to achieve grouting of the anchor rod. Then the equipment is disengaged to complete the installation of the anchor rod. Figure 5 shown.

[0039] The working principle of this utility model:

[0040] 1) The utility model can be matched with an anchor trolley for automatic construction. It is designed according to the automation equipment, and the resin anchoring agent is integrated in the inner cavity of the anchoring section rod. The rotational motion of the rod body is converted into linear motion through thread matching, and the anchoring agent inside the rod body is pushed out to meet the requirements of automated construction;

[0041] 2) The utility model designs a locking nut with a certain inclination angle on the end face. The nut will automatically deflect and lock after being compressed, restricting the movement of the hexagonal nut and forming an interlock. Only an external hexagonal sleeve is needed to drive the rod body to rotate. After being equipped with the locking nut, the functional requirements of the construction equipment for the drilling and hole cleaning process are reduced;

[0042] 3) The end of the hollow rod body of the utility model is connected with a plug (the connection method is not limited to the welding mentioned in this article), which can limit the rod body from retreating during the drilling and hole cleaning stage, and form a self-locking drive with the connecting nut to rotate the anchoring section rod body, and can also effectively prevent the damaged anchoring agent from flowing back into the inner cavity of the anchoring section rod body;

[0043] 4) The utility model is equipped with an anchor head at the end of the anchoring section, which can remove the collapsed rock and soil debris and prevent the rock and soil from entering the rod body, thereby achieving a hole cleaning effect and effectively restricting the rotation of the anchoring section rod body during the anchoring stage, so that the hollow rod body can be screwed in along the connecting nut to push out the resin anchoring agent in the anchoring section;

[0044] 5) The utility model adds a guide tube at the end of the connecting nut (the connection method is not limited to the welding mentioned in this article), which can effectively "straighten" the posture of the anchoring section rod body and make the anchoring section rod body coaxial with the hollow rod body.

Claims

1. A hollow anchor rod with built-in resin prestress suitable for collapsed hole geology, characterized by: It includes an anchoring section rod body and a hollow rod body. An anchoring head is arranged at the front end of the anchoring section rod body, a resin anchoring agent is arranged in the inner cavity of the anchoring section rod body, a plug is arranged at the end of the hollow rod body, and a slurry stopper, a pad, a spherical washer, a hexagonal nut and a locking nut are arranged in sequence on the hollow rod body.

2. The hollow anchor rod with built-in resin prestress suitable for collapsed hole geology according to claim 1 is characterized by: A connecting nut is arranged at the rear end of the anchoring section rod body, and the plug and the connecting nut form a self-locking structure.

3. The resin-embedded prestressed hollow anchor suitable for collapsed hole geology according to claim 2 is characterized in that: A guide cylinder is arranged at the end of the connecting nut.

4. The resin-embedded prestressed hollow anchor suitable for collapsed hole geology according to claim 3 is characterized in that: The guide cylinder is welded to the end of the connecting nut.

5. The resin-embedded prestressed hollow anchor suitable for hole collapse geology according to claim 1, characterized in that: The end face of the locking nut has an inclination.

6. The resin-embedded prestressed hollow anchor suitable for collapsed hole geology according to claim 1, characterized in that: A slurry outlet hole is arranged on the anchoring section rod body.

7. The resin-embedded prestressed hollow anchor suitable for hole collapse geology according to claim 1, characterized in that: A pulp outlet hole is arranged on the hollow rod body.

8. The resin-embedded prestressed hollow anchor suitable for cave-in geology according to claim 1 is characterized in that: The plug is a metal plug.

9. The resin-embedded prestressed hollow anchor suitable for collapsed hole geology according to claim 8, characterized in that: The metal plug is welded to the end of the hollow rod body.

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