Asymmetric steel arch installation auxiliary device for tunnel parallel construction

Abstract

A kind of asymmetric steel arch installation auxiliary device of tunnel parallel construction, belong to the technical field of tunnel construction, including movable chassis, the upper surface of the chassis is connected with movable sliding platform by sliding assembly, the middle part of the sliding platform is connected with the support rod of T shape, the top of the support rod and one side wall are detachably connected with the length-adjustable clamp, the clamp includes bottom plate, the arc clamping piece is symmetrically hinged at the both ends of the bottom plate, and two arc clamping pieces are bolted between them.The utility model can effectively improve the installation positioning precision of steel arch, greatly reduce installation deviation, at the same time, significantly improve the adaptability and adjustment capacity of asymmetric steel arch, reduce the labor intensity of staff, improve the work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel construction technology, and relates to the installation of asymmetrical steel arch frames, and in particular to an auxiliary device for the installation of asymmetrical steel arch frames in tunnel parallel construction. Background Technology

[0002] With the continuous development of tunnel engineering technology, steel arch frames, as an important structural form for tunnel support, are increasingly widely used in complex geological conditions, playing a crucial role in ensuring the stability of tunnel structures and construction safety. The construction of parallel tunnels is usually adjacent to existing tunnels, and their cross-sections often exhibit irregular shapes (such as single-sided widening or elliptical offset).

[0003] Traditional symmetrical steel arch installation devices rely on evenly distributed support points and track systems. However, when applied to asymmetrical cross-sections, these devices, due to their large footprint, are difficult to assist in the installation of asymmetrical steel arches in confined spaces. Furthermore, during tunnel parallel construction, the limited space, asymmetrical structure, and complex construction environment of existing tunnels make traditional steel arch installation auxiliary devices inadequate to meet the requirements of asymmetrical installation and space constraints.

[0004] Therefore, existing technologies often rely on workers' experience to manually or hoist asymmetrical steel arches into place and then repeatedly measure and correct them. The positioning accuracy is significantly affected by human error, and multiple people are needed to cooperate in positioning, supporting and measuring, resulting in low work efficiency and high labor intensity.

[0005] Therefore, in order to solve these problems, this utility model proposes an auxiliary device for installing asymmetrical steel arch frames in tunnel parallel construction. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an auxiliary device for the installation of asymmetrical steel arch frames in tunnel parallel construction, which can solve the technical problems of low positioning accuracy, low efficiency and high labor intensity in the installation of asymmetrical steel arch frames in the prior art.

[0007] To achieve the above and other related objectives, this utility model provides an auxiliary device for installing asymmetrical steel arch frames in tunnel parallel construction, including a movable base frame. A movable sliding platform is connected to the upper surface of the base frame. A "T"-shaped support rod is connected to the middle of the sliding platform. The top and one side wall of the support rod are detachably connected to adjustable clamps. The clamps include a base plate, and arc-shaped clamps are symmetrically hinged at both ends of the base plate. The two arc-shaped clamps are bolted together.

[0008] In any of the above embodiments, it is preferred that the base frame includes a positioning plate, and four threaded legs are evenly connected to the four corners of the bottom of the positioning plate. Fixed legs are threadedly connected to the threaded legs, and sliding wheels are connected to the bottom of the fixed legs.

[0009] In any of the above embodiments, it is preferred that the upper surface of the positioning plate is recessed downward along its length to form a sliding groove, a guide rail is connected in the sliding groove, at least two sliding blocks are connected on the guide rail, and the sliding platform is fixedly connected to the sliding blocks.

[0010] In any of the above embodiments, it is preferred that the support rod is further provided with a limiting component, the limiting component including a limiting groove and a limiting plate.

[0011] In any of the above embodiments, it is preferred that a fixing block is fixed in the middle of the sliding platform, a limiting groove is formed in the middle of the fixing block, and the bottom of the support rod is threadedly connected to the limiting groove.

[0012] In any of the above embodiments, the preferred embodiment is that the limiting plate is fixedly connected to the sliding platform by a bracket, and the lower end of the support rod passes through the middle of the limiting plate and is connected to the limiting groove.

[0013] Preferably, in any of the above embodiments, the top and sidewalls of the support rod are provided with internal threads.

[0014] In any of the above embodiments, it is preferred that a threaded rod adapted to the internal thread of the support rod is fixedly connected to the middle of the lower surface of the base plate, and the clamp and the support rod are connected by the threaded rod.

[0015] Preferably, in any of the above embodiments, rubber pads are provided on the opposite surfaces of the two arc-shaped clips.

[0016] As described above, the auxiliary device for installing asymmetrical steel arch frames in tunnel parallel construction according to this utility model has the following beneficial effects:

[0017] 1. In this utility model, the steel arch frame can only move laterally and longitudinally along the direction of the guide rail and support rod during installation, reducing the influence of human error, thereby effectively improving the installation positioning accuracy of the steel arch frame and significantly reducing installation deviation.

[0018] 2. This utility model significantly improves the adaptability and adjustability of asymmetric steel arch frames.

[0019] 3. This utility model reduces the labor intensity of workers and improves work efficiency. Attached Figure Description

[0020] Figure 1 The diagram shows the working state of this utility model.

[0021] Figure 2 The image shown is a front view of this utility model.

[0022] Figure 3 The image shown is a side view of this utility model.

[0023] Figure 4 The diagram shown is a partially enlarged view of the fixture.

[0024] Component designation explanation

[0025] 1-Base frame; 11-Positioning plate; 12-Threaded support leg; 13-Fixed support leg; 14-Sliding wheel; 2-Sliding platform; 3-Support rod; 4-Clamp; 41-Base plate; 42-Arc-shaped clamp; 43-Bolt; 44-Threaded rod; 45-Rubber pad; 5-Guide rail; 6-Sliding block; 7-Fixed block; 8-Limiting plate; 9-Bracket; 10-Steel arch frame. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0027] Please see Figures 1 to 4 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0028] Please see Figure 1-4 This utility model provides an auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction, including a movable base frame 1, a sliding platform 2 connected to the base frame 1, a "T"-shaped support rod 3 connected to the middle of the sliding platform 2, and a clamp 4 for clamping the steel arch frame 10 that can be detachably connected to the top and one side wall of the support rod 3.

[0029] The movable base frame 1 ensures that the entire auxiliary device can move smoothly in the tunnel, guaranteeing the device's mobility within the tunnel.

[0030] The support rod 3 can be moved via the sliding platform 2, which ensures that the support rod 3 can only move in a straight line, thus ensuring the positioning of the steel arch frame auxiliary device and avoiding deviations and misoperations that may occur during traditional manual adjustment.

[0031] The clamp 4 can hold the steel arch frame 10 in place during installation, ensuring that it will not loosen or shift due to external forces.

[0032] The clamp 4 includes a base plate 41, with two arc-shaped clamping pieces 42 symmetrically hinged at both ends of the base plate 41. The two arc-shaped clamping pieces 42 protrude towards the center of their opposite surfaces to form an arc-shaped surface, ensuring the stability of the clamping of the steel arch frame 10.

[0033] The two arc-shaped clamping pieces 42 are connected and fixed by bolts 43. The two arc-shaped clamping pieces 42 are tightened by bolts and nuts to firmly lock the steel arch frame 10, preventing any structural instability and safety hazards during installation.

[0034] The bottom plate 41 is fixedly connected to the center of its lower surface by a threaded rod 44. The top and one side wall of the support rod 3 are both threaded. The clamp 4 and the support rod 3 are connected by threads via the threaded rod 44 and the internal threads. This threaded connection between the clamp 4 and the support rod 3 allows for easy adjustment of the steel arch frame 10 in the vertical and horizontal directions according to actual conditions, thus meeting different usage requirements.

[0035] Rubber pads 45 are provided on the opposite surfaces of the two arc-shaped clamping pieces 42. The rubber pads 45 are bonded to the arc-shaped clamping pieces 42 to increase the friction when the arc-shaped clamping pieces 42 come into contact with the steel arch frame 10, thereby further improving the clamping effect of the arc-shaped clamping pieces 42 on the steel arch frame 10.

[0036] Therefore, the clamp 4 can clamp and position the steel arch frame 10, and can be adjusted according to the shape and size of the steel arch frame 10 to ensure that the clamp 4 fits tightly. The clamp 4 can firmly grasp the asymmetrical steel arch frame 10 component and maintain its installation posture, effectively preventing the steel arch frame 10 component from slipping or shifting during installation, freeing up the workers' hands, and greatly improving the safety and accuracy of the installation operation.

[0037] As a further description of the above embodiment, the base frame 1 includes a positioning plate 11. Four threaded support legs 12 are evenly connected to the four corners of the bottom of the positioning plate 11. Fixed support legs 13 are threadedly connected to the threaded support legs 12, and sliding wheels 14 are connected to the bottom of the fixed support legs 13, forming a base frame 1 with adjustable sliding wheel 14 height. When the heights on both sides of the tunnel working face are inconsistent, fixed support legs 13 of different lengths are connected to the sliding wheels 14, and fine adjustments are made after connecting the fixed support legs 13 to the threaded support legs 12 to ensure the horizontality of the support rod 3, adapting to different tunnel working faces. Therefore, this embodiment allows adjustment of the height of the sliding wheels 14 on both sides below the positioning plate 11 according to the height of different tunnel working faces, thereby ensuring the horizontality of the support rod 3.

[0038] In this embodiment, the sliding wheel 14 has a built-in brake. The connection method between the sliding wheel 14 and the fixed support leg 13 is prior art, so it will not be described in this embodiment. The design of the sliding wheel 14 allows the device to move freely on different surfaces at the tunnel construction site, such as concrete or other rough surfaces, thereby improving construction efficiency.

[0039] As a further description of the above embodiment, a sliding groove is formed by a downward indentation in the middle of the upper surface of the positioning plate 11 along its length direction. A guide rail 5 is connected inside the sliding groove, and two sliding blocks 6 are connected to the guide rail 5. The sliding platform 2 is fixedly connected to the sliding blocks 6. The sliding platform 2 moves along the length direction of the positioning plate 11 by moving the sliding blocks 6 on the guide rail 5, thereby facilitating the horizontal adjustment and positioning of the steel arch frame 10.

[0040] The guide rail 5 provides a motion track for the sliding platform 2, ensuring that the sliding platform 2 can slide smoothly along a predetermined path.

[0041] The sliding block 6 cooperates with the guide rail 5 to help the sliding platform 2 slide smoothly. The upper end of the sliding block 6 is connected to the sliding platform 2, and the lower end wraps around the guide rail 5. Ball bearings are installed inside. With the use of lubricating oil, the ball bearings can reduce friction, allowing the sliding block 6 and the sliding platform 2 to slide more smoothly on the guide rail 5, thus improving the overall stability of the system.

[0042] As a further description of the above embodiments, in order to achieve adjustable support and stable fixation of the steel arch frame 10, the position of the support rod 3 can be freely adjusted according to the installation requirements of the asymmetric steel arch frame 10 to prevent the steel arch frame 10 from tilting and sliding during installation, thereby improving support stability and construction safety. In this embodiment, two sets of limiting components are also provided outside the support rod 3.

[0043] A set of limiting components consists of a fixing block 7 fixedly connected to the middle of the sliding platform 2. The middle of the fixing block 7 is recessed downward to form a limiting groove with internal threads. The bottom of the support rod 3 is provided with external threads, and the bottom of the support rod 3 is threadedly connected to the limiting groove. The threaded connection between the support rod 3 and the limiting groove facilitates the adjustment of the height of the support rod 3, thereby adjusting the height of the steel arch frame 10. On the other hand, it can fix the lower end of the support rod 3, prevent unnecessary lateral displacement of the support rod 3, ensure the stability of the support rod 3, and thus ensure the installation accuracy of the steel arch frame 10.

[0044] Of course, a limiting groove with internal threads can also be directly recessed downward in the middle of the sliding platform 2, and the support rod 3 can be threadedly connected to the sliding platform 2.

[0045] Another set of limiting components is the limiting plate 8. The limiting plate 8 is fixedly connected to the sliding platform 2 by the bracket 9. A through hole is opened in the middle of the limiting plate 8. The lower end of the support rod 3 passes through the through hole on the limiting plate 8 and is connected to the limiting groove, which plays the role of assisting in fixing the support rod 3, while providing lateral support force to balance the eccentric force generated by the steel arch frame 10 on the support rod 3 during construction.

[0046] The inner diameter of the through hole on the limiting plate 8 is equal to the outer diameter of the support rod 3, to prevent the support rod 3 from wobbling inside the through hole of the limiting plate 8.

[0047] In summary, the specific implementation steps for installing auxiliary devices for asymmetric steel arch frames during tunnel parallel construction are as follows:

[0048] (1) Technical preparation: Check the construction drawings and the steel arch frame 10 processing drawings, lay out the arch foot position and center line, and determine the number, mileage and asymmetrical side of each arch frame.

[0049] (2) On-site preparation: Clean the work surface and set up a flat moving path.

[0050] (3) Equipment inspection: Check whether the bottom sliding wheel 14 rotates and brakes flexibly;

[0051] Are the guide rail 5 and positioning plate 11 straight and free from deformation?

[0052] Check if the ball bearings of sliding block 6 are adequately lubricated;

[0053] Check whether the support rod 3, the limiting plate 8, the limiting groove, the bolts and nuts, and the clamp 4 (including the rubber pad 45) are complete and in good condition.

[0054] (4) Installation of base frame 1 and guide rail 5: Assemble base frame 1 outside the hole or on the platform at the hole entrance, fix guide rail 5 and check parallelism and straightness with positioning plate 11.

[0055] (5) Installation of the sliding system: Set the ball-bearing sliding block 6 onto the guide rail 5 and connect it to the sliding platform 2 so that the platform can move smoothly back and forth on the guide rail 5 without jamming.

[0056] (6) Installation of support rod 3: Pass the support rod 3 through the limiting plate 8 and thread it into the limiting groove at the center of the sliding platform 2.

[0057] (7) Fixture 4 installation: Connect the fixture 4 to the upper and side ends of the support rod 3 through the threaded rod 44, and leave enough adjustment range.

[0058] (8) No-load test run: Manually push the base frame 1 to move; slide the platform 2 back and forth on the guide rail 5; adjust the thread of the support rod 3 to achieve lifting and swing angle; check whether the pre-tightening and release status of the clamp 4 is normal; confirm whether the brake, limit and each locking part are effective.

[0059] (9) Move into the working area: Release the brake of the sliding wheel 14 and push the device along the paved path to the designated mileage; lock the sliding wheel 14 in the working position.

[0060] (10) Establish benchmarks: Based on the layout results or laser alignment, adjust the base frame 1 to keep the guide rail 5 horizontal; if necessary, add shims under the positioning plate 11 to level it and ensure that the sliding platform 2 is horizontal.

[0061] (11) Loading: The asymmetrical arch frame section to be installed is sent to the side of the device using a simple lifting tool, and the position of the outer arc and inner arc of the steel arch frame 10 facing the existing tunnel is adjusted.

[0062] (12) Clamping: First, loosen clamp 4 and adjust upper clamp 4 to the design elevation position by screwing the threads of upper clamp 4 and support rod 3. Then, place the corresponding part of steel arch frame 10 between upper clamp 4 so that rubber pad 45 is in close contact with the steel surface; tighten clamp bolts and nuts evenly to ensure reliable connection between steel arch frame 10 and upper clamp 4 and avoid slippage; keep side clamp 4 in the loose state.

[0063] (13) Horizontal positioning: Push the sliding platform 2 along the guide rail 5 to the designed horizontal position, and quickly center it using the reference provided by the positioning plate 11.

[0064] (14) Angle adjustment: After the horizontal positioning is completed, loosen the connection of the upper clamp 4 slightly. After the steel arch frame 10 is adjusted to the inclination, tighten the bolts and nuts of the upper clamp 4 and the side clamp 4 evenly to achieve the inclination control of the steel arch frame 10.

[0065] (15) Release of clamp 4: After the steel arch frame 10 is installed, slowly loosen clamp 4, observe whether the steel arch frame 10 rebounds or shifts, and after confirming that it is stable, completely loosen and remove clamp 4.

[0066] (16) Install adjacent segments: Move the auxiliary device to the next installation position and repeat steps (10) to (15) until the ring or the asymmetrical steel arch 10 on the side is installed.

[0067] In summary, this invention effectively improves the installation and positioning accuracy of steel arch frames, significantly reduces installation deviations, and substantially enhances the adaptability and adjustability of asymmetrical steel arch frames, thereby reducing the labor intensity of workers and increasing work efficiency. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0068] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction, comprising a movable base frame (1), characterized in that: The upper surface of the base frame (1) is connected to a movable sliding platform (2). A "T"-shaped support rod (3) is connected to the middle of the sliding platform (2). The top and one side wall of the support rod (3) are detachably connected to a length-adjustable clamp (4). The clamp (4) includes a base plate (41). The two ends of the base plate (41) are symmetrically hinged with arc-shaped clamping pieces (42). The two arc-shaped clamping pieces (42) are connected by bolts (43).

2. The auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction according to claim 1, characterized in that: The base frame (1) includes a positioning plate (11), and four threaded legs (12) are evenly connected at the four corners of the bottom of the positioning plate (11). Each threaded leg (12) is threaded with a fixed leg (13), and a sliding wheel (14) is connected to the bottom of the fixed leg (13).

3. The auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction according to claim 2, characterized in that: The upper surface of the positioning plate (11) is recessed downward along its length to form a sliding groove. A guide rail (5) is connected inside the sliding groove. At least two sliding blocks (6) are connected on the guide rail (5). The sliding platform (2) is fixedly connected to the sliding blocks (6).

4. The auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction according to claim 1, characterized in that: The support rod (3) is also provided with a limiting component, which includes a limiting groove and a limiting plate (8).

5. The auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction according to claim 4, characterized in that: A fixing block (7) is fixed in the middle of the sliding platform (2), and a limiting groove is opened in the middle of the fixing block (7). The bottom of the support rod (3) is threadedly connected to the limiting groove.

6. The auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction according to claim 4, characterized in that: The limiting plate (8) is fixedly connected to the sliding platform (2) by the bracket (9), and the lower end of the support rod (3) passes through the middle of the limiting plate (8) and is connected to the limiting groove.

7. The auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction according to claim 1, characterized in that: The top and side walls of the support rod (3) are both provided with internal threads.

8. The auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction according to claim 7, characterized in that: A threaded rod (44) adapted to the internal thread of the support rod (3) is fixedly connected to the middle of the lower surface of the base plate (41), and the clamp (4) and the support rod (3) are connected by the threaded rod (44).

9. The auxiliary device for installing asymmetrical steel arch frames during tunnel parallel construction according to claim 1, characterized in that: Rubber pads (45) are provided on the opposite surfaces of the two arc-shaped clips (42).

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