A tunnel construction lock foot large anchor pipe connecting device

Abstract

The utility model relates to water conservancy construction technical field, proposes a kind of tunnel construction lock foot big anchor pipe connecting device, comprising: several equidistance layout's I-beam, with the sliding connection of I-beam connecting channel steel and with the detachable connection of connecting channel steel lock foot big anchor pipe. The connecting channel steel is equipped with I-beam connecting portion and lock foot big anchor pipe connecting port, the preliminary positioning of I-beam can be realized by I-beam connecting portion, and the sliding connection of I-beam connecting portion and I-beam is utilized, after completing the preliminary positioning of I-beam, when I-beam and lock foot big anchor pipe need to be connected, quickly slide to the below of connecting I-beam and lock foot big anchor pipe and carry out positioning, finally connecting channel steel, lock foot big anchor pipe, I-beam are welded into whole. The device structure is simple, improves welding stability and welding area, can effectively prolong the time of primary support structure to bear surrounding rock deformation, reduces rework, improves construction quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower technology, and in particular to a large anchor pipe connection device for tunnel construction. Background Technology

[0002] In tunnel construction within water conservancy and hydropower engineering, sections with large deformation in soft rock, such as inclined shafts, horizontal tunnels, and vertical shafts, suffer from poor surrounding rock geological conditions. Deformation of the surrounding rock leads to deformation of the primary support system, encroaching on the secondary lining space. Current technologies employ L-shaped steel bars welded to anchor pipes to prevent deformation of the primary support system. However, this method suffers from a small welding area and poor overall stress distribution, leaving the primary support system prone to deformation and often requiring rework.

[0003] Therefore, there is an urgent need for a large anchor pipe connection device for tunnel construction to reduce the time required for the initial support system to withstand the stress and deformation of the surrounding rock, thereby reducing the problem of rework. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a large anchor pipe connection device for tunnel construction, which allows the initial support system to withstand the stress and deformation of the surrounding rock, thereby reducing the need for rework.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A tunnel construction anchor pipe connection device includes: several equidistantly arranged I-beams, a connecting channel steel slidably connected to the I-beams, and an anchor pipe detachably connected to the connecting channel steel.

[0007] The connecting channel steel has two symmetrically arranged I-beam connecting parts on one side. The I-beam connecting parts include: a chute, several blocks at the top of the chute wall, and a locking bolt with one end penetrating the chute wall. The chute is slidably connected to the end of the I-beam away from the surrounding rock. The chute wall has a threaded hole, and the outer wall of the locking bolt has an external thread that matches the threaded hole. One end of the locking bolt passes through the threaded hole and abuts against the side wall of the chute section where the I-beam is placed. The connecting channel steel has a locking foot anchor pipe connection port. The locking foot anchor pipe connection port is a U-shaped groove that penetrates the connecting channel steel. One end of the locking foot anchor pipe is inserted into the surrounding rock, and the other end extends out of the U-shaped groove.

[0008] Preferably, the chute wall is made of square steel, and the square steel is fixedly connected to the connecting channel steel.

[0009] Preferably, a reinforcing block is fixedly connected to the top of the stop block, with one end of the reinforcing block connected to the stop block and the other end fixedly connected to the groove wall.

[0010] Preferably, the locking bolt has a handle fixedly connected to the end away from the groove wall.

[0011] Preferably, the outer wall of the anchor pipe with locking foot is provided with several grouting holes.

[0012] Preferably, the outer side of the grouting hole is provided with several barbs.

[0013] Preferably, the barb is an angle steel, and the angle between the barb and the anchor tube of the locking foot is no greater than 30°.

[0014] This utility model discloses a large anchor pipe connection device for tunnel construction with the following beneficial effects.

[0015] This utility model includes: several equidistantly arranged I-beams, a connecting channel steel slidably connected to the I-beams, and a locking anchor pipe detachably connected to the connecting channel steel. The connecting channel steel has an I-beam connecting part and a locking anchor pipe connecting port. The I-beam connecting part allows for initial positioning of the I-beams. Utilizing the sliding connection between the connecting part and the I-beam, after initial positioning, when connecting the I-beam to the locking anchor pipe, the channel steel quickly slides below the connecting I-beam and locking anchor pipe for positioning. Finally, the connecting channel steel, locking anchor pipe, and I-beams are welded together. This device has a simple structure, improves welding stability and welding area, effectively extends the time the initial support structure can withstand surrounding rock deformation, reduces rework, and improves construction quality and efficiency. Attached Figure Description

[0016] Figure 1 A front view diagram showing the initial fixation of adjacent I-beams using connecting channel steel before using small anchor bolts to fix the I-beams.

[0017] Figure 2 A front view diagram showing how the anchor pipe is connected to the I-beam as a whole via connecting channel steel after the I-beam is fixed.

[0018] Figure 3 A top view diagram showing how the anchor pipe is connected to the I-beam as a whole via connecting channel steel after the I-beam is fixed.

[0019] Figure 4 for Figure 3 A magnified view of the central area.

[0020] Figure 5 This is a schematic diagram of the rear view of the connecting channel steel.

[0021] In the attached diagram: 1. Connecting channel steel; 11. I-beam connecting part; 111. Slide groove; 112. Stop block; 113. Reinforcing block; 114. Locking bolt; 12. Locking foot anchor pipe connection port; 2. Locking foot anchor pipe; 21. Grouting hole; 22. Barb; 3. I-beam. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example 1

[0024] Reference Figures 1 to 5 As shown, a tunnel construction anchor pipe connection device includes: several equidistantly arranged I-beams 3, a connecting channel steel 1 slidably connected to the I-beams 3, and an anchor pipe 2 detachably connected to the connecting channel steel 1.

[0025] like Figure 5 As shown, in this embodiment, two symmetrically arranged I-beam connecting portions 11 are provided on one side of the connecting channel steel 1. Preferably, in this embodiment, the I-beam connecting portion 11 includes: a sliding groove 111, several blocks 112 located at the top of the groove wall of the sliding groove 111, and a locking bolt 114 with one end penetrating through the groove wall of the sliding groove 111. Preferably, in this embodiment, the sliding groove 111 is slidably connected to the end of the I-beam 3 away from the surrounding rock. Preferably, in this embodiment, the groove wall of the sliding groove 111 is provided with a threaded hole, and the outer wall of the locking bolt 114 is provided with an external thread matching the threaded hole. One end of the locking bolt 114 passes through the threaded hole and abuts against the side wall of the section of the I-beam 3 located in the sliding groove 111. Preferably, in this embodiment, the connecting channel steel 1 is provided with a locking foot anchor pipe connection port 12. Preferably, in this embodiment, the locking foot anchor pipe connection port 12 is a U-shaped groove penetrating the connecting channel steel 1. Preferably, in this embodiment, one end of the locking foot anchor pipe 2 is inserted into the surrounding rock, and the other end extends out of the U-shaped groove.

[0026] It should be noted that in this embodiment, the connecting channel steel 1 serves two purposes: firstly, it provides initial positioning for the I-beam 3; specifically, as follows... Figure 1As shown, before constructing the initial support system, it is necessary to first lay I-beams 3 on the outside of the surrounding rock. When laying the I-beams 3, first place the I-beams 3, and then fix the I-beams 3 on the outside of the surrounding rock with small anchor rods. Before using small anchor rods to fix the I-beams, it is necessary to perform preliminary positioning of the I-beams 3. In this embodiment, by making the two I-beam connecting parts 11 of the connecting channel steel 1 slide and connect them to the adjacent I-beams 3 respectively, and then by using locking bolts 114 to press the I-beams 3 against the side wall of the sliding groove 111 section to prevent the I-beams 3 from tilting, the I-beams 3 are initially positioned, which facilitates the insertion of small anchor rods to fix the I-beams 3.

[0027] Secondly, the connection between the I-beam 3 and the anchor pipe 2, specifically, as follows: Figures 2-4 As shown, after the initial positioning of the I-beam 3, anchor holes need to be opened in the surrounding rock. After opening the anchor holes, the locking foot anchor pipe 2 is inserted. Then, the locking foot anchor pipe 2 is connected to the connecting I-beam 3 through the connecting channel steel 1. During this process, the locking bolt 114 needs to be removed first to allow the excess connecting channel steel 1 to slide out of the I-beam 3. Then, the anchor holes are opened, and the locking foot anchor pipe 2 is inserted. Then, the remaining connecting channel steel 1 is slid to the bottom of the locking foot anchor pipe 2. At the same time, the locking bolt 114 is used to press the I-beam 3 against the side wall of the sliding groove 111 section to prevent the connecting channel steel 1 from moving. This allows the locking foot anchor pipe 2 to be inserted into the locking foot anchor pipe connection port 12. Then, the locking foot anchor pipe 2 and the connecting channel steel 1 are welded together. Welding the connecting channel steel 1 and the I-beam 3 together not only facilitates positioning during welding but also increases the welding area, allowing the initial support system to better bear the stress with the surrounding rock, extending the time for the initial support system to withstand the stress deformation of the surrounding rock, and reducing the problem of rework.

[0028] The connecting channel steel 1 can be used to initially position the I-beam 3 when laying it out, and it can also be quickly slid under the connecting I-beam 3 and the anchor pipe 2 when it is necessary to connect the I-beam 3 and the anchor pipe 2, thereby improving the speed of the initial support system construction and extending the time for the initial support system to withstand the stress and deformation of the surrounding rock.

[0029] Preferably, in this embodiment, in order to reduce the grooving cost of the groove 111, such as Figure 4 As shown, the groove wall of the chute 111 is made of square steel, and the square steel is fixedly connected to the connecting channel steel 1.

[0030] Preferably, in this embodiment, in order to enhance the connection stability of the stop block 112, a reinforcing block 113 is fixedly connected to the top of the stop block 112. Preferably, in this embodiment, one end of the reinforcing block 113 is welded to the stop block 112, and the other end is welded to the groove wall of the slide 111.

[0031] Preferably, in this embodiment, a handle is fixedly connected to the end of the locking bolt 114 away from the groove wall of the slide 111, which facilitates locking or loosening the locking bolt 114. When in use, the handle can be directly struck with a rubber hammer to quickly lock or loosen the locking bolt 114.

[0032] Preferably, in this embodiment, the outer wall of the anchor pipe 2 is provided with several grouting holes 21.

[0033] Preferably, in this embodiment, in order to improve the pull-out resistance of the anchor pipe 2, a number of barbs 22 are provided on the outside of the grouting hole 21.

[0034] Preferably, in this embodiment, the barb 22 is an angle steel, and the included angle between the barb 22 and the locking foot anchor tube 2 is no greater than 30°.

[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. A large anchor pipe connection device for tunnel construction, characterized in that, include: Several equidistant I-beams, a connecting channel steel that is slidably connected to the I-beams, and a large anchor pipe with locking feet that is detachably connected to the connecting channel steel; The connecting channel steel has two symmetrically arranged I-beam connecting parts on one side. The I-beam connecting parts include: a chute, several blocks at the top of the chute wall, and a locking bolt with one end penetrating the chute wall. The chute is slidably connected to the end of the I-beam away from the surrounding rock. The chute wall has a threaded hole, and the outer wall of the locking bolt has an external thread that matches the threaded hole. One end of the locking bolt passes through the threaded hole and abuts against the side wall of the chute section where the I-beam is placed. The connecting channel steel has a locking foot anchor pipe connection port. The locking foot anchor pipe connection port is a U-shaped groove that penetrates the connecting channel steel. One end of the locking foot anchor pipe is inserted into the surrounding rock, and the other end extends out of the U-shaped groove.

2. The tunnel construction anchor pipe connection device according to claim 1, characterized in that, The chute wall is made of square steel, which is fixedly connected to the connecting channel steel.

3. The tunnel construction anchor pipe connection device according to claim 1, characterized in that, A reinforcing block is fixedly connected to the top of the stop block. One end of the reinforcing block is connected to the stop block, and the other end is fixedly connected to the groove wall.

4. The tunnel construction anchor pipe connection device according to claim 1, characterized in that, The locking bolt has a handle fixedly connected to the end away from the slide wall.

5. The tunnel construction anchor pipe connection device according to claim 1, characterized in that, The outer wall of the anchor pipe with locking foot is provided with several grouting holes.

6. The tunnel construction anchor pipe connection device according to claim 5, characterized in that, The outside of the grouting hole is provided with several barbs.

7. A tunnel construction anchor pipe connection device according to claim 6, characterized in that, The barbs are made of angle steel, and the angle between the barbs and the anchor tube of the locking foot is no greater than 30°.

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