A two-lining trolley template mistake-preventing slope support fixing device

Abstract

The utility model belongs to the technical field of tunnel engineering construction, and relates to a two-lining trolley template mistake-preventing inclined support fixing device, which comprises detachably connected protection pad plates and inclined support bases, the protection pad plates are fixedly connected by two steel plates to form V-shaped structures with the same corner angle as the corner angle of inverted arch filling surfaces, the inclined support base comprises an inclined support rod, one end of the inclined support rod is hinged to the bottom frame of the trolley template, the other end of the inclined support rod is fixedly connected with a connecting plate, and the connecting plate is fixedly connected with detachable connecting pieces for connecting the protection pad plates. The utility model can be quickly installed, can protect the integrity of the structure, can significantly improve the overall stability of the template support system, can reduce the longitudinal deviation of the template during concrete pouring, can effectively prevent the longitudinal misalignment of the secondary low side wall, and can further guarantee the linearity of the tunnel lining structure.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel engineering construction technology and is applicable to the diagonal bracing and fixing of various tunnel secondary lining trolleys to prevent longitudinal misalignment of secondary low sidewalls. In particular, it relates to a diagonal bracing and fixing device for preventing misalignment of secondary lining trolley templates. Background Technology

[0002] In the secondary lining construction of tunnel engineering, the secondary lining trolley is the core load-bearing equipment for concrete pouring. The stability and installation efficiency of its inclined support system are directly related to construction safety, project quality and schedule.

[0003] The widely used secondary lining trolley inclined brace bases in the industry currently suffer from several technical pain points. Traditional inclined brace bases require multiple position calibrations and tightening operations during installation, which are cumbersome and time-consuming, severely restricting construction progress. In complex geological conditions such as weak surrounding rock, frequent installation adjustments may also lead to instability of the trolley support, increasing safety risks. At the same time, the contact area between the inclined brace base and the invert arch filling surface is mostly at the corners of the concrete. When the traditional metal base directly bears the pressure, the supporting stress is concentrated, far exceeding the design value of the concrete's compressive strength, which can easily lead to cracks in the invert arch filling surface, affecting the overall structural integrity and increasing repair costs. Furthermore, the existing inclined brace bases and pads are mostly integrated welded structures. When the tunnel cross-section dimensions change or the geological conditions change, the entire inclined brace assembly needs to be replaced, resulting in high customization costs and complex spare parts inventory management, further increasing construction costs. In addition, traditional inclined bracing systems are prone to loosening of the formwork under the pressure of concrete pouring due to insufficient positioning accuracy or insufficient support rigidity during installation and adjustment. This can lead to gaps in the formwork and cause longitudinal misalignment of the secondary low sidewalls. Such misalignment not only affects the linear straightness of the tunnel lining structure, but also requires subsequent chiseling and repair, increasing construction costs and the risk of delays. This has become another key pain point restricting the improvement of tunnel engineering quality.

[0004] Therefore, developing a secondary lining trolley formwork anti-misalignment diagonal bracing fixing device that combines rapid installation, structural protection, and broad adaptability has become a key requirement for upgrading tunnel construction equipment. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a secondary lining trolley formwork anti-misalignment diagonal bracing fixing device to solve the technical problems of the prior art secondary lining trolley formwork diagonal bracing fixing device being complicated to install and operate, damaging the integrity of the inverted arch filling surface structure, and easily causing longitudinal misalignment of the secondary low sidewall.

[0006] To achieve the above and other related objectives, this utility model provides a diagonal bracing fixing device for preventing misalignment of a secondary lining trolley template, comprising a detachably connected protective pad and a diagonal bracing base. The protective pad is formed by two steel plates fixedly connected to form a V-shaped structure with the same angle as the inverted arch filling surface. The diagonal bracing base includes a diagonal bracing member, one end of which is hinged to the bottom frame of the trolley template, and the other end is fixedly connected to a connecting plate. A detachable connecting piece that connects to the protective pad is fixedly connected to the connecting plate.

[0007] Preferably, in any of the above embodiments, the protective pad is welded from two 16mm thick steel plates.

[0008] In any of the above embodiments, it is preferred that the detachable connector is a V-shaped locking block, and two V-shaped locking blocks are connected in parallel on the connecting plate, and the two V-shaped locking blocks are engaged with the protective pad plate.

[0009] In any of the above embodiments, it is preferred that the two bottom edges of the V-shaped card block are respectively attached to the two outer edges of the protective pad.

[0010] Preferably, in any of the above solutions, the diagonal brace, the connecting plate, and the V-shaped locking block are welded together.

[0011] Preferably, in any of the above embodiments, the protective pad is welded and fixed with two blocks, the two blocks being located outside the two V-shaped locking blocks.

[0012] In any of the above embodiments, it is preferred that a fine-tuning gap is provided between each of the two stops and the adjacent V-shaped block.

[0013] As described above, the anti-misalignment diagonal bracing fixing device for the secondary lining trolley template of this utility model has the following beneficial effects:

[0014] 1. In this utility model, the protective pad can cover the contact area of ​​the corner of the invert arch filling surface, disperse the support pressure, avoid concrete cracks or damage caused by local stress concentration, and ensure the integrity of the structure.

[0015] 2. In this utility model, the protective pad and the inclined support base are detachably connected, which can be quickly installed and positioned, improving construction efficiency. At the same time, it is also easy to disassemble and replace, thus adapting to different construction conditions. It is suitable for the inclined support fixing of various tunnel lining trolleys and has strong operability and wide applicability.

[0016] 3. In this utility model, the V-shaped locking block design of the inclined brace base and the synergistic effect of the stop block can significantly improve the overall stability of the formwork support system, reduce the longitudinal displacement of the formwork during concrete pouring, effectively prevent the longitudinal misalignment of the secondary low side wall, and further ensure the linear straightness of the tunnel lining structure. Attached Figure Description

[0017] Figure 1 The diagram shown is a structural schematic of this utility model.

[0018] Component designation explanation

[0019] 1-Diagonal brace; 2-Connecting plate; 3-V-shaped locking block; 4-Protective pad; 5-Stop block. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1 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.

[0022] Please see Figure 1 This utility model provides a diagonal bracing fixing device for the anti-misalignment platform of the secondary lining trolley template, including a detachably connected protective pad 4 and a diagonal bracing base. The protective pad 4 is formed by two steel plates fixedly connected to form a V-shaped structure with the same angle as the corner of the invert arch filling surface. It can cover the contact area between the corner of the invert arch filling surface and the diagonal bracing base, avoid cracks or damage to the invert arch filling surface due to local stress concentration, and protect the integrity of the concrete structure.

[0023] The diagonal brace base includes a diagonal brace member 1. One end of the diagonal brace member 1 is hinged to the template frame via a pre-set dedicated connection node at the bottom of the trolley template. The connection point must match the design support angle of the trolley to ensure that the support force is evenly distributed along the longitudinal direction of the template. The other end of the diagonal brace member 1 is fixedly connected to a connecting plate 2, on which two parallel V-shaped clips 3 are fixedly connected. The V-shaped clips 3 are attached to the protective pad plate 4 to achieve quick installation and positioning of the diagonal brace base, improving construction efficiency.

[0024] In this embodiment, the combination of the inclined brace base and the protective pad 4 is suitable for the inclined bracing and fixing of various tunnel secondary lining trolleys, especially for lining construction under weak surrounding rock geological conditions. Through the precise positioning of the inclined brace base and the rigid constraint of the protective pad 4, the formwork can be effectively prevented from loosening due to external pressure during concrete pouring, thus preventing the formation of formwork gaps and preventing longitudinal misalignment of the secondary lining low sidewalls.

[0025] In this embodiment, the protective pad 4 is welded from two 16mm thick steel plates. The angle between the two steel plates is determined according to the angle of the invert arch filling surface, ensuring that the protective pad can cover the edge of the invert arch filling surface.

[0026] In this embodiment, the diagonal brace 1, the connecting plate 2, and the V-shaped locking block 3 are welded and fixed together.

[0027] In this embodiment, for different tunnel cross-sectional dimensions or geological conditions, the support height can be adjusted by replacing the diagonal bracing members 1 with different lengths or adjustable lengths, and the protective pads 4 with different thicknesses can be replaced to adapt to load changes.

[0028] As a further description of the above embodiment, two stops 5 are welded and fixed to the protective pad 4, and the two stops 5 are located outside the two V-shaped locking blocks 3. At the same time, a fine-adjustment gap is left between the two stops 5 and the adjacent V-shaped locking blocks 3.

[0029] In this embodiment, the stop block 5 is a steel bar with a diameter of 16mm. The setting of the stop block 5 can restrict the movement of the inclined brace base. The setting of the fine-tuning gap between the stop block 5 and the adjacent V-shaped clamp 3 allows the V-shaped clamp 3 to be finely adjusted to adapt to construction errors, restricts the displacement of the V-shaped clamp 3 along the longitudinal direction of the tunnel, and avoids the inclined brace steel bar from shifting due to the pressure of concrete pouring.

[0030] In summary, this invention enables rapid installation, protects the integrity of the structure, significantly improves the overall stability of the formwork support system, reduces longitudinal displacement of the formwork during concrete pouring, effectively prevents secondary longitudinal misalignment of the low sidewalls, and further ensures the linear straightness of the tunnel lining structure. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0031] 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. A diagonal bracing fixing device for preventing misalignment of a secondary lining trolley template, characterized in that: It includes a detachable protective pad (4) and a diagonal brace base. The protective pad (4) is formed by two steel plates fixedly connected to form a V-shaped structure with the same angle as the inverted arch filling surface. The diagonal brace base includes a diagonal brace member (1). One end of the diagonal brace member (1) is hinged to the bottom frame of the trolley template, and the other end is fixedly connected to a connecting plate (2). A detachable connector that connects to the protective pad (4) is fixedly connected to the connecting plate (2).

2. The anti-misalignment diagonal bracing fixing device for the secondary lining trolley template according to claim 1, characterized in that: The protective pad (4) is welded from two 16mm thick steel plates.

3. The anti-misalignment diagonal bracing fixing device for the secondary lining trolley template according to claim 1, characterized in that: The detachable connector is a V-shaped locking block (3). Two V-shaped locking blocks (3) are connected in parallel on the connecting plate (2). The two V-shaped locking blocks (3) are detachably connected to the protective pad plate (4).

4. The anti-misalignment diagonal bracing fixing device for the secondary lining trolley template according to claim 3, characterized in that: The two bottom sides of the V-shaped card block (3) are respectively attached to the two outer sides of the protective pad (4).

5. The anti-misalignment diagonal bracing fixing device for the secondary lining trolley template according to claim 3, characterized in that: The diagonal brace (1), connecting plate (2) and V-shaped clip (3) are welded and fixed together.

6. The anti-misalignment diagonal bracing fixing device for the secondary lining trolley template according to claim 3, characterized in that: Two blocks (5) are welded and fixed on the protective pad (4), and the two blocks (5) are located outside the two V-shaped blocks (3).

7. The anti-misalignment diagonal bracing fixing device for the secondary lining trolley template according to claim 6, characterized in that: Fine-tuning gaps are provided between the two stops (5) and the adjacent V-shaped blocks (3).

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