A positioning tool for tunnel primary support reinforcement

Abstract

A kind of positioning tool for tunnel initial support reinforcement, including two connecting sliding pipes and two vertical main pipes, two connecting sliding pipes are connected to the connecting plate of left and right sides of tunnel steel arch respectively, the upper end of two vertical main pipes is connected to two connecting sliding pipes respectively, multiple positioning branch pipes are arranged at the outer side of vertical main pipe at intervals, transverse reinforcement is placed on the upper side of two positioning branch pipes, horizontal connecting plate is connected to the outer side of vertical positioning main pipe, two horizontal connecting plates are connected to each other by first connecting piece, multiple clamping plates are arranged at the length direction of one side of horizontal connecting plate at intervals, longitudinal reinforcement is inserted into clamping plate.The design fixes multiple transverse reinforcement by positioning branch pipe, simultaneously, multiple longitudinal reinforcement is fixed by clamping plate, since the distance of each positioning branch pipe and clamping plate is set in advance, the spacing between each transverse reinforcement and each longitudinal reinforcement is fixed, so that the welding error of reinforcement mesh sheet is smaller.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering technology, and in particular to a positioning tool for the initial support reinforcement of tunnels. Background Technology

[0002] The steel mesh used in the initial support of tunnels plays a crucial role in stabilizing the surrounding rock. During construction, existing steel meshes are typically fabricated on the ground by placing transverse and longitudinal steel bars alternately on the ground and then welding the joints to form the mesh. However, controlling the spacing of the steel bars before welding is challenging, as misalignment or displacement can easily occur, leading to significant dimensional errors in the mesh and making quality control difficult. This not only increases the risk of missing steel bars but also reduces the overall support coefficient, greatly impacting construction quality. Furthermore, since the transverse and longitudinal steel bars are placed on the ground, welding can only be done while squatting, making the operation extremely inconvenient. Summary of the Invention

[0003] The purpose of this utility model is to overcome the defects and problems of large welding errors and inconvenient welding of steel mesh in the existing technology, and to provide a positioning tool for the initial support steel bars of tunnels with smaller welding errors and easier welding.

[0004] To achieve the above objectives, the technical solution of this utility model is: a positioning tool for initial support reinforcement in tunnels, comprising two connecting slide pipes and two vertical main pipes. The two connecting slide pipes are symmetrically arranged and respectively connected to connecting plates on the left and right sides of the tunnel steel arch frame. The upper ends of the two vertical main pipes are respectively connected to the two connecting slide pipes. Multiple horizontally placed positioning branch pipes are arranged at intervals along the axial direction on the outer side of the vertical main pipe. Transverse reinforcement is placed on the upper side of the two positioning branch pipes located on the same horizontal plane. A transverse positioning plate is horizontally connected to the outer side of the vertical positioning main pipe. The two transverse positioning plates are connected to each other through a first connector. Multiple clamping plates are arranged at intervals along the length direction on one side of the transverse positioning plate. The longitudinal reinforcement is inserted into the clamping plate.

[0005] A connecting rod is provided on the upper side of the connecting slide tube. One end of the connecting rod is provided with a threaded section, which is threaded to the connecting plate of the tunnel steel arch frame. The other end of the connecting rod is provided with a notch. The outer circumferential surface of the connecting slide tube is provided with a groove that matches the notch along the axial direction. The connecting rod is slidably connected to the groove through the notch.

[0006] The outer circumferential surface of the connecting slide tube is provided with an adjustment port along the radial direction. The vertical main tube is slidably connected to the inner sidewall of the adjustment port. The vertical main tube is connected to the connecting slide tube by fasteners.

[0007] The fastener includes a fastening rod and a connecting block. The fastening rod is threaded to the connecting slide tube and its bottom end passes through the side wall of the connecting slide tube and abuts against the outer side of the vertical main tube. The connecting block is connected to the top of the fastening rod.

[0008] The vertical main tube includes multiple positioning main tubes connected coaxially in sequence. Multiple positioning branch tubes are spaced apart on the outside of each positioning main tube. The horizontal positioning plate is connected to the outside of each positioning main tube. Adjacent positioning main tubes are connected to each other through a second connector.

[0009] The horizontal positioning plate includes a vertical plate, a horizontal plate, and connecting bolts. The vertical plate is threadedly connected to the positioning main pipe by the connecting bolts. The horizontal plate is connected to the lower side of the vertical plate. Multiple clamping plates are horizontally connected to one side of the horizontal plate. Two horizontal plates are connected to each other by a first connecting member.

[0010] The horizontal plate has multiple positioning holes, and the two horizontal plates are arranged vertically. The first connecting member includes a connecting bolt, which is threaded to the positioning holes on the two horizontal plates in sequence.

[0011] The outer side of the positioning main tube has a vertical groove, and the vertical plate has a horizontal groove. The connecting bolt passes through the horizontal and vertical grooves and is threaded with a connecting nut. The connecting nut abuts against the outer side of the positioning main tube.

[0012] The second connector includes a connecting sleeve, a transverse connecting bolt, and a longitudinal connecting bolt. The connecting sleeve is fitted onto the ends of two adjacent positioning main tubes. The transverse connecting bolt is threaded to the connecting sleeve. The bottom end of the transverse connecting bolt passes through the connecting sleeve and is threaded to a transverse connecting nut on one of the positioning main tubes. The longitudinal connecting bolt is threaded to the connecting sleeve. The bottom end of the longitudinal connecting bolt passes through the connecting sleeve and is threaded to a longitudinal connecting nut on the other positioning main tube.

[0013] The card plate includes two symmetrically arranged baffles, and a slot for longitudinal reinforcing bars to pass through is provided between the two baffles.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model discloses a positioning tool for initial support reinforcement in tunnels. By connecting a connecting slide pipe to a connecting plate of a steel arch frame, a vertical main pipe can be installed on the connecting slide pipe. The vertical main pipe fixes multiple transverse reinforcements through positioning branch pipes, and multiple longitudinal reinforcements are fixed through the clamping plates of the transverse positioning plate. Since the distance between each positioning branch pipe and the clamping plate is pre-set, the spacing between each transverse reinforcement and each longitudinal reinforcement is fixed, thus minimizing welding errors in the reinforcement mesh. Furthermore, the reinforcement mesh formed by the transverse and longitudinal reinforcements is placed vertically, providing ample welding space and eliminating the need for prolonged squatting during welding, making welding more convenient. Therefore, this utility model exhibits smaller welding errors and facilitates welding.

[0016] 2. In this utility model, a positioning tool for initial support reinforcement in tunnels includes a connecting rod that is slidably connected to a connecting slide tube. After the connecting rod is threaded into the bolt holes on the connecting plate, the connecting slide tube can be moved to slide on the connecting rod, thus adjusting its position. An adjustment port allows for rapid adjustment of the vertical main pipe's elevation by moving it up and down. A fastening rod, once the vertical main pipe is in place, can be rotated by rotating the connecting block to fix the vertical main pipe to the connecting slide tube. Therefore, this utility model is convenient to use and has high stability.

[0017] 3. In this utility model, a positioning tool for initial support reinforcement in tunnels utilizes multiple positioning main pipes spliced ​​together. The number of positioning main pipes can be selected based on the actual height on site, thereby adjusting the overall height of the vertical main pipe, resulting in high applicability. The positioning main pipes are connected by connecting sleeves, which are then fixed to the positioning main pipes using bolts, providing good fixation. The inclusion of slots facilitates the passage of longitudinal reinforcement while simultaneously limiting its movement. Therefore, this utility model offers high applicability and excellent fixation.

[0018] 4. In this utility model, a positioning tool for initial support reinforcement in tunnels, after the vertical main pipe is fixed, two horizontal plates are stacked together. Because multiple positioning holes are provided, the two horizontal plates can be connected and fixed using connecting bolts. By providing horizontal and vertical grooves, the height of the horizontal positioning plate on the positioning main pipe can be adjusted, thus facilitating the insertion of the longitudinal reinforcement into the slots. Therefore, this utility model is convenient to use and has high stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a front view of the vertical main pipe, connecting rod, horizontal positioning plate, and connecting slide tube in this utility model.

[0021] Figure 3 This is a structural diagram of the positioning main tube, connecting rod, connecting slide tube, and fasteners in this utility model.

[0022] Figure 4 This is a schematic diagram of the connecting rod in this utility model.

[0023] Figure 5 This is a schematic diagram of the connecting slide tube in this utility model.

[0024] Figure 6 This is a side view of the vertical main pipe, connecting rod, horizontal positioning plate, and connecting slide tube in this utility model.

[0025] Figure 7 This is a schematic diagram of the structure of the second connecting member in this utility model.

[0026] Figure 8 This is a structural schematic diagram of the transverse positioning plate and the clamping plate in this utility model.

[0027] In the diagram: Longitudinal reinforcement 1, Transverse reinforcement 2, Connecting slide pipe 3, Slide groove 31, Adjustment port 32, Connecting rod 4, Threaded section 41, Notch 42, Vertical main pipe 5, Positioning main pipe 51, Fastener 52, Fastening rod 521, Connecting block 522, Second connecting piece 53, Connecting sleeve 531, Transverse connecting bolt 532, Longitudinal connecting bolt 533, Transverse connecting nut 534, Longitudinal connecting nut 535, Longitudinal groove 54, Positioning branch pipe 6, Transverse positioning plate 7, Vertical plate 71, Horizontal plate 72, Connecting bolt 73, Connecting nut 74, Positioning hole 75, Horizontal groove 76, Clamping plate 8, Baffle 81, Clamping groove 82, First connecting piece 9, Connecting bolt 91. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1:

[0030] See Figures 1 to 8 A positioning tool for initial support reinforcement in tunnels includes two connecting slide pipes 3 and two vertical main pipes 5. The two connecting slide pipes 3 are symmetrically arranged and respectively connected to connecting plates on the left and right sides of the tunnel steel arch frame. The upper ends of the two vertical main pipes 5 are respectively connected to the two connecting slide pipes 3. Multiple horizontally placed positioning branch pipes 6 are arranged at intervals along the axial direction on the outer side of the vertical main pipe 5. The transverse reinforcement 2 is placed on the upper side of the two positioning branch pipes 6 located on the same horizontal plane. A transverse positioning plate 7 is horizontally connected to the outer side of the vertical positioning main pipe 51. The two transverse positioning plates 7 are connected to each other by a first connector 9. Multiple clamping plates 8 are arranged at intervals along the length direction on one side of the transverse positioning plate 7. The longitudinal reinforcement 1 is inserted into the clamping plate 8.

[0031] The vertical main tube 5 includes a plurality of positioning main tubes 51 connected coaxially in sequence. Each positioning main tube 51 has a plurality of positioning branch tubes 6 spaced apart on its outer side. Each positioning main tube 51 is connected to the horizontal positioning plate 7 on its outer side. Adjacent positioning main tubes 51 are connected to each other by a second connector 53.

[0032] The clamping plate 8 includes two symmetrically arranged baffles 81, and a groove 82 for the longitudinal reinforcing bar 1 to pass through is provided between the two baffles 81.

[0033] In this embodiment, the positioning main pipe 51 is made of a square tube with a side length of 50mm and a wall thickness of 3mm as the main material, and the positioning branch pipe 6 is made of an ordinary steel pipe with a diameter of 16mm and a wall thickness of 1mm as the main material, and is welded to the positioning main pipe 51; the horizontal positioning plate 7 is made of a steel plate with a thickness of 6mm as the main material and is cut into shape; in the whole device, the distance between the positioning branch pipe 6 and the slot 82 can be adjusted according to the requirements, and the length of the vertical main pipe 5 and the horizontal positioning plate 7 can be adjusted according to the actual working environment;

[0034] Based on the actual height on site, the vertical main pipe 5 is fixed by connecting sliding pipe 3, and then another set of vertical main pipes 5 is fixed. Finally, the first connector 9 passes through the pre-drilled holes on the two layers of horizontal positioning plates 7 to complete the rapid assembly. In use, the initial support longitudinal steel bars 1 are first placed on the positioning branch pipes 6 on the vertical main pipe 5, and then the initial support transverse steel bars are inserted into the slots 82 of the clamping plate 8. Then, the steel bars are tied at the joints with tie wire. Through this device, the steel bar spacing is uniform, the quantity is correct, the tying is convenient and standardized, and the level of standardized operation is high. Finally, the entire device is dismantled and recycled.

[0035] Example 2:

[0036] The basic content is the same as in Example 1, except that:

[0037] See Figures 3 to 5A connecting rod 4 is provided on the upper side of the connecting slide tube 3. One end of the connecting rod 4 is provided with a threaded section 41, which is threaded to the connecting plate of the tunnel steel arch frame. The other end of the connecting rod 4 is provided with a notch 42. The outer circumferential surface of the connecting slide tube 3 is provided with a groove 31 that matches the notch 42 along the axial direction. The connecting rod 4 is slidably connected to the groove 31 through the notch 42. The outer circumferential surface of the connecting slide tube 3 is provided with an adjustment port 32 along the radial direction. The vertical main pipe 5 is slidably connected to the inner side wall of the adjustment port 32. The vertical main pipe 5 is connected to the connecting slide tube 3 by a fastener 52. The fastener 52 includes a fastening rod 521 and a connecting block 522. The fastening rod 521 is threaded to the connecting slide tube 3 and its bottom end passes through the side wall of the connecting slide tube 3 and abuts against the outer side of the vertical main pipe 5. The connecting block 522 is connected to the top end of the fastening rod 521.

[0038] In this embodiment, the connecting slide tube 3 uses a square tube with a side length of 60mm and a wall thickness of 3mm as the main material. The square tube has a pre-reserved slide groove 31, a square adjustment port 32 and bolt holes. The bolt holes reserved on the side wall need to be threaded internally. The connecting rod 4 uses a straight threaded sleeve with an inner diameter of 22mm and a wall thickness of 4mm and a round steel with a diameter of 22mm as the main material. One end of the round steel is welded to the end of the straight threaded sleeve, and the other end has a pre-reserved slide groove. The fastening rod 521 uses a round steel with a diameter of 12mm as the main material. The joint is welded and the joint is threaded externally.

[0039] First, connect the connecting rod 4 to the bolt holes of the tunnel arch connecting plate. Then, slide the pre-reserved notch 4 on the connecting rod 4 into the connecting slide tube 2 along the slide groove 31 of the connecting slide tube 3, so that the connecting slide tube 2 is suspended in the air. Next, insert the vertical main pipe 5 into the pre-reserved adjustment port 32 on the connecting rod 4, and adjust the elevation by moving it up and down. After adjusting the elevation, use the fastening rod 52 to fix the connecting slide tube 2 and the vertical main pipe 5 together.

[0040] Example 3:

[0041] The basic content is the same as in Example 1, except that:

[0042] See Figure 6 and Figure 8The horizontal positioning plate 7 includes a vertical plate 71, a horizontal plate 72, and a connecting bolt 73. The vertical plate 71 is threadedly connected to the positioning main tube 51 by the connecting bolt 73. The horizontal plate 72 is connected to the lower side of the vertical plate 71. Multiple clamping plates 8 are horizontally connected to one side of the horizontal plate 72. The two horizontal plates 72 are connected to each other by a first connecting member 9. The horizontal plate 72 has multiple positioning holes 75. The two horizontal plates 72 are arranged vertically. The first connecting member 9 includes a connecting plug 91. The connecting plug 91 is threadedly connected to the positioning holes 75 on the two horizontal plates 72 in sequence. The outer side of the positioning main tube 51 has a vertical groove 54. The vertical plate 71 has a horizontal groove 76. The connecting bolt 73 passes through the horizontal groove 76 and the vertical groove 54 and is threadedly connected to a connecting nut 74. The connecting nut 74 abuts against the outer side of the positioning main tube 51.

[0043] In this embodiment, a longitudinal groove 54 is reserved on the positioning main tube 51, a positioning hole 75 is reserved on the horizontal plate 72, a horizontal groove 76 is reserved on the vertical plate 71, and the connecting bolt 91 uses round steel with a diameter of 10mm as the main material, and the joint is welded.

[0044] First, adjust the height of the overall horizontal positioning plate 7 by moving the vertical plate 71 up and down. After adjustment, screw in the connecting bolt 73. The connecting bolt 73 passes through the horizontal groove 76 and the vertical groove 54 and is then threaded to the connecting nut 74, so that the horizontal positioning plate 7 is connected and fixed to the positioning main tube 51. Then, align the positioning holes 75 of the two horizontal plates 72 and connect and fix the two horizontal positioning plates 7 by connecting bolt 91.

[0045] Example 4:

[0046] The basic content is the same as in Example 1, except that:

[0047] See Figure 7 The second connecting member 53 includes a connecting sleeve 531, a transverse connecting bolt 532, and a longitudinal connecting bolt 533. The connecting sleeve is sleeved on the ends of two adjacent positioning main tubes 51. The transverse connecting bolt 532 is threaded to the connecting sleeve 531. The bottom end of the transverse connecting bolt 532 passes through the connecting sleeve 531 and is threaded to a transverse connecting nut 534 after passing through one of the positioning main tubes 51. The longitudinal connecting bolt 533 is threaded to the connecting sleeve 531. The bottom end of the longitudinal connecting bolt 533 passes through the connecting sleeve 531 and is threaded to a longitudinal connecting nut 535 after passing through the other positioning main tube 51.

[0048] In this embodiment, bolt holes are pre-drilled on the positioning main tube 51, and the connecting sleeve 531 is made of a square tube with a side length of 60mm and a wall thickness of 3mm as the main material, with bolt holes pre-drilled on the square tube; the transverse connecting bolt 532 and the longitudinal connecting bolt 533 are both ordinary bolts with a diameter of 12mm.

[0049] In use, first, put the connecting sleeve 531 on the end of one of the positioning main tubes 51, then put the other positioning main tube 51 into the connecting sleeve 531, then adjust the position of the two positioning main tubes 51 so that the bolt holes of the connecting sleeve 531 are aligned with the bolt holes on the positioning main tubes 51, then insert the transverse connecting bolt 532 and the longitudinal connecting bolt 533 in sequence, and screw in the transverse connecting nut 534 and the longitudinal connecting nut 535 to connect and fix the two positioning main tubes 51 to the connecting sleeve 531.

[0050] Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A positioning tool for tunnel primary lining reinforcement, characterized in that: It includes two connecting slide pipes (3) and two vertical main pipes (5). The two connecting slide pipes (3) are symmetrically arranged and connected to the connecting plates on the left and right sides of the tunnel steel arch frame respectively. The upper ends of the two vertical main pipes (5) are respectively connected to the two connecting slide pipes (3). Multiple horizontally placed positioning branch pipes (6) are arranged at intervals along the axial direction on the outer side of the vertical main pipe (5). The transverse steel bars (2) are placed on the upper side of the two positioning branch pipes (6) located on the same horizontal plane. A transverse positioning plate (7) is horizontally connected to the outer side of the vertical main pipe (5). The two transverse positioning plates (7) are connected to each other through a first connector (9). Multiple clamping plates (8) are arranged at intervals along the length direction on one side of the transverse positioning plate (7). The longitudinal steel bars (1) are inserted into the clamping plates (8).

2. A positioning tool for tunnel primary lining reinforcement bars according to claim 1, characterized in that: A connecting rod (4) is provided on the upper side of the connecting slide tube (3). One end of the connecting rod (4) is provided with a threaded section (41). The threaded section (41) is threaded to the connecting plate of the tunnel steel arch frame. The other end of the connecting rod (4) is provided with a notch (42). The outer circumferential surface of the connecting slide tube (3) is provided with a groove (31) that matches the notch (42) along the axial direction. The connecting rod (4) is slidably connected to the groove (31) through the notch (42).

3. The positioning tool for initial support reinforcement in tunnels according to claim 1, characterized in that: The outer circumferential surface of the connecting slide tube (3) is provided with an adjustment port (32) in the radial direction. The vertical main tube (5) is slidably connected to the inner side wall of the adjustment port (32). The vertical main tube (5) is connected to the connecting slide tube (3) by a fastener (52).

4. A positioning tool for initial support reinforcement in tunnels according to claim 3, characterized in that: The fastener (52) includes a fastening rod (521) and a connecting block (522). The fastening rod (521) is threaded to the connecting slide tube (3) and its bottom end passes through the side wall of the connecting slide tube (3) and abuts against the outer side of the vertical main tube (5). The connecting block (522) is connected to the top of the fastening rod (521).

5. A positioning tool for initial support reinforcement in tunnels according to claim 1, characterized in that: The vertical main tube (5) includes multiple positioning main tubes (51) connected coaxially in sequence. Multiple positioning branch tubes (6) are provided at intervals on the outside of each positioning main tube (51). The horizontal positioning plate (7) is connected to the outside of each positioning main tube (51). Adjacent positioning main tubes (51) are connected to each other through a second connector (53).

6. A positioning tool for initial support reinforcement in tunnels according to claim 5, characterized in that: The transverse positioning plate (7) includes a vertical plate (71), a horizontal plate (72), and a connecting bolt (73). The vertical plate (71) is threadedly connected to the positioning main pipe (51) by the connecting bolt (73). The horizontal plate (72) is connected to the lower side of the vertical plate (71). Multiple clamping plates (8) are transversely connected to one side of the horizontal plate (72). Two horizontal plates (72) are connected to each other by a first connecting member (9).

7. A positioning tool for initial support reinforcement in tunnels according to claim 6, characterized in that: The horizontal plate (72) has multiple positioning holes (75), and the two horizontal plates (72) are arranged vertically. The first connecting member (9) includes a connecting plug (91), and the connecting plug (91) is threaded to the positioning holes (75) on the two horizontal plates (72) in sequence.

8. A positioning tool for initial support reinforcement in tunnels according to claim 6, characterized in that: The outer side of the positioning main tube (51) is provided with a vertical groove (54) in the vertical direction, and the vertical plate (71) is provided with a horizontal groove (76) in the horizontal direction. The connecting bolt (73) passes through the horizontal groove (76) and the vertical groove (54) and is threaded to a connecting nut (74). The connecting nut (74) abuts against the outer side of the positioning main tube (51).

9. A positioning tool for initial support reinforcement in tunnels according to claim 5, characterized in that: The second connector (53) includes a connecting sleeve (531), a transverse connecting bolt (532), and a longitudinal connecting bolt (533). The connecting sleeve is fitted onto the ends of two adjacent positioning main tubes (51). The transverse connecting bolt (532) is threaded to the connecting sleeve (531). The bottom end of the transverse connecting bolt (532) passes through the connecting sleeve (531) and is threaded to one of the positioning main tubes (51) with a transverse connecting nut (534). The longitudinal connecting bolt (533) is threaded to the connecting sleeve (531). The bottom end of the longitudinal connecting bolt (533) passes through the connecting sleeve (531) and is threaded to the other positioning main tube (51) with a longitudinal connecting nut (535).

10. A positioning tool for initial support reinforcement in tunnels according to claim 1, characterized in that: The clamping plate (8) includes two symmetrically arranged baffles (81), and a groove (82) for the longitudinal reinforcing bar (1) to pass through is provided between the two baffles (81).

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