Support device for the bottom end of a diagonal brace and two formwork panels

Abstract

This utility model relates to secondary lining formwork construction, specifically to a support device for the bottom end of a diagonal brace and a secondary lining formwork. The support device for the bottom end of the diagonal brace includes a base and a limiting component. The base includes a base plate and a vertical plate. The vertical plate is located at one end along the length of the base plate, and its top is connected to the base plate. Side plates are respectively provided at both ends of the top surface of the base plate along its width. The base has several slot groups spaced apart along the length of the base plate. Each slot group includes a first slot and two second slots. The first slot is located on the top surface of the base plate, and the two second slots are respectively located opposite each other on the top edges of the two side plates. The limiting component can engage with the first slot and the two second slots of the slot group, and the limiting component is used to support the bottom end of the diagonal brace. This device transfers the support point of the bottom end of the diagonal brace to the top surface of the inverted arch filling, which can reduce the angle between the diagonal brace and the horizontal plane, thereby improving the support effect of the diagonal brace on the secondary lining formwork.

Description

Technical Field

[0001] This utility model relates to the field of secondary lining formwork construction, and in particular to a support device for the bottom end of the diagonal brace and a secondary lining formwork. Background Technology

[0002] In the tunnel secondary lining construction process, the construction of the tunnel bottom invert is usually carried out first. Invert sidewalls are located on both sides of the invert, serving to ensure a stable connection with the subsequent secondary lining structure. After the invert construction is completed, the invert filling work is carried out on the upper part of the invert. The invert filling presents a boss structure, with edges and side facades extending along the tunnel axis on both sides. During secondary lining construction, the secondary lining formwork must be tightly abutted against the invert sidewalls, and then diagonal braces are used to support the bottom of the secondary lining formwork, with the bottom ends of the diagonal braces supporting the side facades of the invert filling.

[0003] However, because the position of the invert arch infill side facade is lower than that of the secondary lining formwork, and when the horizontal distance between the invert arch infill side facade and the bottom of the secondary lining formwork is too close, the angle between the diagonal brace and the horizontal plane will approach 90°. At this angle, the horizontal component force generated by the diagonal brace is small and cannot provide effective support for the secondary lining formwork. Utility Model Content

[0004] The purpose of this invention is to overcome the problem in the prior art where, when using diagonal braces to support the bottom of the secondary lining formwork, the bottom end of the diagonal brace rests on the side facade of the inverted arch filling, resulting in the diagonal brace failing to provide effective support for the secondary lining formwork. Therefore, this invention provides a support device for the bottom end of the diagonal brace and a secondary lining formwork.

[0005] In a first aspect, the present invention provides a support device for the bottom end of a diagonal brace, comprising: The base includes a base plate and a vertical plate. The vertical plate is located at one end of the base plate along its length. The top of the vertical plate is connected to the base plate. Side plates are respectively provided at both ends of the top surface of the base plate along its width. The base is provided with a plurality of slot groups spaced apart along the length of the base plate. Each slot group includes a first slot and two second slots. The first slot is provided on the top surface of the base plate, and the two second slots are respectively provided opposite to each other on the top edges of the two side plates. A limiting component is provided, which can engage with the first slot and the two second slots of the slot group, and the limiting component is used to support the bottom end of the diagonal brace.

[0006] This utility model provides a support device for the bottom end of a diagonal brace. The base of the device is used to install at the corner of the inverted arch filling. The base plate supports the top surface of the corner, and the vertical plate supports the side surface of the corner. This installation method can effectively restrict the base from moving away from the tunnel sidewall. The first and second slots in the slot group are respectively arranged on the base plate and the side plate, and the first and second slots serve to install the limiting component. A plurality of the slot groups are distributed at intervals along the length of the base plate, thereby allowing flexible adjustment of the position of the limiting component on the base. The function of the limiting component is to provide a support point for the bottom end of the diagonal brace, achieving stable support for the bottom end of the diagonal brace.

[0007] This invention provides a support device for the bottom end of a diagonal brace. By installing this support device at the corner of the inverted arch filling, the limiting component provides a support point for the bottom end of the diagonal brace. Unlike the traditional method of directly supporting the bottom end of the diagonal brace on the side facade of the inverted arch filling, this device transfers the support point of the bottom end of the diagonal brace to the top surface of the inverted arch filling. While the position of the top support point of the diagonal brace remains unchanged, this transfer of the support point increases the horizontal distance between the bottom and top ends of the diagonal brace, thereby reducing the angle between the diagonal brace and the horizontal plane. The reduction in the angle increases the horizontal supporting force of the diagonal brace on the secondary lining template, thus improving the supporting effect of the diagonal brace on the secondary lining template.

[0008] The limiting component can be a plate-shaped structure, with components at both ends of the top edge of the plate-shaped structure that can engage with the second slot, and components at the bottom edge of the plate-shaped structure that can engage with the first slot; the limiting component can be a combination structure including a horizontal bar and a vertical bar, with the top end of the vertical bar connected to the horizontal bar, both ends of the horizontal bar able to engage in the second slot, and the bottom end of the vertical bar able to engage in the first slot.

[0009] Preferably, the limiting component includes a horizontal bar and a vertical bar, the top of the vertical bar being connected to the middle position of the horizontal bar, both ends of the horizontal bar being capable of engaging with the second slot, and the bottom of the vertical bar being capable of engaging with the first slot. Compared to limiting components using a plate-like structure, the limiting component in this preferred embodiment requires less material to manufacture, effectively reducing material costs.

[0010] Preferably, a pressure strip is provided on the top edge of the side plate at the position of the second slot. The pressure strip is rotatably connected to the side plate and can cover the opening of the second slot. In this design, when the crossbar is engaged in the second slot, the pressure strip can rotate to above the second slot, thereby pressing down on the opening of the second slot and preventing the crossbar from accidentally slipping out of the second slot.

[0011] The spacing of the plurality of slot groups along the length of the base plate can be uniform or non-uniform.

[0012] Preferably, the plurality of the card slot groups are evenly spaced along the length direction of the base plate, and the interval between two adjacent card slot groups is 20mm-50mm.

[0013] Preferably, the vertical plate is provided with vertically arranged ribs. In this design, under the action of the diagonal brace, the side of the angled edge will exert a reverse force on the vertical plate. By providing the ribs, the rigidity of the vertical plate can be effectively increased to resist this reverse force.

[0014] The ribs can be of equal width at the top and bottom, or they can be a gradually changing structure that is wider at the top and narrower at the bottom.

[0015] Preferably, the rib has a gradually tapering structure, wider at the top and narrower at the bottom. This design, with the ribs wider at the top and narrower at the bottom, offers the advantage of saving material. This is because when the vertical plate is under stress, the bending moment is greater in the upper region. By using a gradually tapering structure, wider ribs can be arranged in the upper region where the bending moment is greater to enhance structural strength, while the rib width can be appropriately reduced in the lower region where the bending moment is smaller. This reduces unnecessary material usage while ensuring the overall structural strength.

[0016] The base plate, the vertical plate, and the two side plates can be manufactured using a one-piece molding process, or they can be made by splicing multiple steel plates. Preferably, the base plate, the vertical plate, and the two side plates are all made of steel plates spliced ​​together. One-piece molding processes typically require specific molds and complex machining procedures, leading to higher manufacturing costs. However, using steel plates for splicing eliminates the need for large custom molds, simplifies the machining process, and effectively reduces manufacturing costs. Therefore, this solution using steel plates for splicing is more economical.

[0017] Preferably, the thickness of the steel plate is 10mm-20mm.

[0018] Preferably, the surfaces of the base plate, the vertical plate, the two side plates, and the limiting component are all provided with a galvanized anti-rust layer. In this design, the galvanized anti-rust layer can slow down the rusting rate of the various components of the device, effectively improving the durability of the entire device and thus extending its service life.

[0019] In a second aspect, the present invention provides a secondary lining template, including a bottom side mold and a diagonal brace. The bottom of the diagonal brace is provided with a support device for the bottom end of the diagonal brace as described in the first aspect. The bottom side mold is used to be installed at the connection between the secondary lining structure to be poured and the inverted arch side wall. The diagonal brace is supported between the bottom side mold and the limiting component of the device.

[0020] The bottom side mold is used to form the concrete in the area near the inverted arch sidewall in the secondary lining structure.

[0021] This utility model provides a secondary lining template. By installing the support device at the corner of the inverted arch filling, the support point at the bottom of the diagonal brace is transferred to the top surface of the inverted arch filling. While the position of the support point at the top of the diagonal brace remains unchanged, this transfer of the support point increases the horizontal distance between the bottom and top of the diagonal brace, thereby reducing the angle between the diagonal brace and the horizontal plane. The reduction in the angle increases the horizontal supporting force of the diagonal brace on the secondary lining template, thus improving the supporting effect of the diagonal brace on the secondary lining template.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a support device for the bottom end of a diagonal brace. By installing this support device at the corner of the inverted arch filling, the limiting component provides a support point for the bottom end of the diagonal brace. Unlike the traditional method of directly supporting the bottom end of the diagonal brace on the side facade of the inverted arch filling, this device transfers the support point of the bottom end of the diagonal brace to the top surface of the inverted arch filling. While the position of the top support point of the diagonal brace remains unchanged, this transfer of the support point increases the horizontal distance between the bottom and top ends of the diagonal brace, thereby reducing the angle between the diagonal brace and the horizontal plane. The reduction in the angle increases the horizontal supporting force of the diagonal brace on the secondary lining template, thereby improving the supporting effect of the diagonal brace on the secondary lining template. 2. This utility model provides a secondary lining template. By installing the support device at the corner of the inverted arch filling, the support point at the bottom of the diagonal brace is transferred to the top surface of the inverted arch filling. While the position of the support point at the top of the diagonal brace remains unchanged, this transfer of support point increases the horizontal distance between the bottom and top of the diagonal brace, thereby reducing the angle between the diagonal brace and the horizontal plane. The reduction in angle increases the horizontal supporting force of the diagonal brace on the secondary lining template, thus improving the supporting effect of the diagonal brace on the secondary lining template. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first structure of a support device for the bottom end of a diagonal brace.

[0024] Figure 2 This is a schematic diagram of the second structure of a support device for the bottom end of a diagonal brace.

[0025] Figure 3 This is a front view of a support device for the bottom end of a diagonal brace.

[0026] Figure 4 This is a side view of a support device for the bottom end of a diagonal brace.

[0027] Figure 5 This is a top view of a support device for the bottom end of a diagonal brace.

[0028] Figure 6 This is a schematic diagram of the limiting component.

[0029] Figure 7 This is a schematic diagram showing the usage of a support device for the bottom end of a diagonal brace.

[0030] Marked in the image: 1-Base, 11-Base plate, 111-First slot, 12-Vertical plate, 121-Rib plate 2-Side panels, 21-Second card slot, 3-Limiting components, 31-Horizontal bar, 32-Vertical bar 4-Diagonal brace, 5- Bottom side mold, 6-Secondary lining structure to be poured. 7-Inverted arch structure, 71-Inverted arch sidewall, 8-Inverted arch filling, 81 - Edges and corners. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0032] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0034] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0035] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0036] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0037] Example 1 like Figures 1 to 6 As shown, a support device for the bottom end of a diagonal brace includes a base 1 and a limiting component 3.

[0038] The base 1 includes a base plate 11 and a vertical plate 12. The vertical plate 12 is located at one end of the base plate 11 along its length. The top of the vertical plate 12 is connected to the base plate 11. Side plates 2 are respectively provided at both ends of the top surface of the base plate 11 along its width. The base 1 is provided with a plurality of slot groups that are spaced apart along the length of the base plate 11. Each slot group includes a first slot 111 and two second slots 21. The first slot 111 is provided on the top surface of the base plate 11, and the two second slots 21 are respectively provided opposite to each other on the top edges of the two side plates 2.

[0039] The limiting component 3 can engage with the first slot 111 and the two second slots 21 of the slot group. The limiting component 3 is used to support the bottom end of the diagonal brace 4.

[0040] Specifically, the width of the base plate 11 can be 80mm-160mm, and the length of the base plate 11 can be 100mm-400mm, with the specific length set according to actual needs. The height of the vertical plate 12 can be 80mm-150mm, and the width of the vertical plate 12 can be 80mm-160mm. The inverted arch filler 8 is located at the top of the inverted arch structure 7. The length of the side plate 2 is the same as the length of the base plate 11, and the height of the side plate 2 can be 60mm-120mm. The bottom edge of the side plate 2 is welded to the top surface of the base plate 11. The number of the slot groups can be 3, 4, 5, 6, or 7.

[0041] In this design, the limiting component 3 has the function of engaging with different slot groups. In actual use, the limiting component 3 can be engaged with the appropriate slot group according to specific needs. Furthermore, when it is necessary to change the installation position of the limiting component 3, the limiting component 3 can be easily removed from the original slot group and then reinstalled on other slot groups in the required positions.

[0042] In an optional embodiment, the limiting component 3 may include a horizontal bar 31 and a vertical bar 32. The top of the vertical bar 32 is connected to the middle position of the horizontal bar 31, both ends of the horizontal bar 31 can be engaged with the second slot 21, and the bottom of the vertical bar 32 can be engaged with the first slot 111. Specifically, the horizontal bar 31 and the vertical bar 32 form a T-shaped component. The cross-section of both the horizontal bar 31 and the vertical bar 32 can be a square with a side length of 10mm-20mm or a circle with a diameter of 10mm-20mm.

[0043] In an optional embodiment, a pressure strip may be provided on the top edge of the side plate 2 at the position of the second slot 21. The pressure strip is rotatably connected to the side plate 2 and can cover the opening of the second slot 21. Specifically, one end of the pressure strip is rotatably connected to the top edge of the side plate 2, and the plane of rotation of the pressure strip is perpendicular to the plane of the side plate 2. The pressure strip is not shown in the figure.

[0044] In an optional embodiment, a plurality of the card slot groups can be evenly spaced along the length of the base plate 11, and the interval between two adjacent card slot groups can be 20mm-50mm, specifically 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, or 50mm.

[0045] In an optional embodiment, the vertical plate 12 may be provided with vertically arranged ribs 121. Specifically, the ribs 121 may be provided on the side of the vertical plate 12 away from the bottom plate 11.

[0046] In an optional embodiment, the rib 121 can be a gradient structure that is wider at the top and narrower at the bottom. Specifically, the thickness of the rib 121 can be 10mm-15mm, and the width of the top of the rib 121 can be 20mm-40mm.

[0047] In an optional embodiment, the base plate 11, the vertical plate 12, and the two side plates 2 can all be made of steel plates spliced ​​together. Specifically, the rib plate 121 can also be made of steel plate. The connection method between the base plate 11, the vertical plate 12, the two side plates 2, and the rib plate 121 is welding.

[0048] In an optional embodiment, the thickness of the steel plate can be 10mm-20mm, specifically 10mm, 12mm, 15mm, 18mm, or 20mm.

[0049] In an optional embodiment, the surfaces of the base plate 11, the vertical plate 12, the two side plates 2, and the limiting component 3 can all be provided with a galvanized anti-rust layer. Specifically, the thickness of the galvanized anti-rust layer can be 70 micrometers to 100 micrometers.

[0050] Example 2 like Figure 7As shown, a secondary lining template includes a bottom side mold 5 and diagonal braces 4. The bottom of the diagonal braces 4 is equipped with a support device for the bottom end of the diagonal brace as described in Embodiment 1. The bottom side mold 5 is installed at the connection between the secondary lining structure 6 to be poured and the inverted arch sidewall 71. The diagonal braces 4 are supported between the bottom side mold 5 and the limiting component 3 of the device. Specifically, the diagonal braces 4 can be telescopic rods made of steel bars. The bottom side mold 5 can be a steel template, and the bottom side mold 5 is hinged to the top of the diagonal braces 4.

[0051] The manufacturing and installation methods of the support device for the bottom end of the diagonal brace described in Example 1 are as follows.

[0052] 1. Based on the tunnel cross-sectional dimensions, mainly the positional relationship between the invert arch filling 8 and the invert arch sidewall 71, and combined with the setting of the diagonal bracing rod 4 of the bottom side formwork 5 of the tunnel secondary lining, measure the support angle between the diagonal bracing rod 4 and the corner 81 of the invert arch filling 8, and calculate how long the bottom end of the diagonal bracing rod 4 needs to be extended horizontally to make the support angle more suitable.

[0053] 2. Based on the determined support angle, calculate the required length of the base 1 of the entire device, and then process and manufacture it. Several steel plates are mainly used to cut and process into a base plate 11, a vertical plate 12, two side plates 2, and a limiting component 3. Several second slots 21 on the two side plates 2 correspond one-to-one with the first slots 111 on the base plate 11. These corresponding slots serve as several slot groups that can be adjusted and fixed by the limiting component 3.

[0054] 3. Install the device onto the corner 81 of the invert arch filling 8. When supporting the bottom side formwork 5 of the tunnel secondary lining, after selecting a suitable support angle, place the limiting component 3 directly into the slot group at the appropriate position, and support the bottom end of the diagonal brace 4 directly on the limiting component 3. Finally, rotate the diagonal brace 4 to tighten both ends, ensuring that the bottom side formwork 5 is tightly attached to the invert arch sidewall 71.

[0055] The support device for the bottom end of the diagonal brace provided by this utility model also has the following beneficial effects and advantages.

[0056] 1. Good adjustability: This device can be used for multi-angle adjustment and fixing of the diagonal bracing rod 4 of the bottom side formwork 5 of the tunnel secondary lining. It can solve the limitation problem that the diagonal bracing rod 4 can only be supported at the corner 81 or side face of the invert arch filling 8 in the traditional method. This device can extend the bottom end of the diagonal bracing rod 4 to the top surface of the invert arch filling 8. The device is equipped with several slot groups as limiting components 3, which can selectively adjust the installation position. The diagonal bracing rod 4 can be adjusted and fixed at multiple angles to adapt to tunnel structures with different span-to-rise ratios, and has strong adaptability.

[0057] 2. Simple processing and installation: This device is made by cutting and processing common steel plates commonly used in construction. The materials are readily available, and the structural design is simple and easy to process. This device can be centrally processed by the processing plant according to the designed structural dimensions, with uniform dimensions, light overall structure weight, and easy to use.

[0058] 3. It also has the function of protecting the finished product. This device can be placed on the corner 81 of the invert arch filling 8. The diagonal brace 4 is directly supported by the limiting part 3 of this device, and is not directly supported on the corner 81 of the invert arch filling 8, thus avoiding damage to the corner 81 by the diagonal brace 4 and having a good filling protection function.

[0059] 4. Reusable: This device is made of high-strength steel plates, which are not easily damaged during construction. It can be reused in different structural sections of the tunnel, which helps to save construction costs.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A support device for the bottom end of a diagonal brace, characterized in that, include: The base (1) includes a base plate (11) and a vertical plate (12). The vertical plate (12) is located at one end of the base plate (11) along its length. The top of the vertical plate (12) is connected to the base plate (11). Side plates (2) are respectively provided at both ends of the top surface of the base plate (11) along its width. The base (1) is provided with a plurality of slot groups that are spaced apart along the length of the base plate (11). Each slot group includes a first slot (111) and two second slots (21). The first slot (111) is provided on the top surface of the base plate (11), and the two second slots (21) are respectively provided opposite to each other on the top edges of the two side plates (2). The limiting component (3) is capable of engaging with the first slot (111) and the two second slots (21) of the slot group. The limiting component (3) is used to support the bottom end of the diagonal brace (4).

2. The support device for the bottom end of a diagonal brace according to claim 1, characterized in that, The limiting component (3) includes a horizontal bar (31) and a vertical bar (32). The top of the vertical bar (32) is connected to the middle position of the horizontal bar (31). The two ends of the horizontal bar (31) can be engaged with the second slot (21) respectively. The bottom of the vertical bar (32) can be engaged with the first slot (111).

3. A support device for the bottom end of a diagonal brace according to claim 2, characterized in that, A pressure strip is provided on the top edge of the side plate (2) at the position of the second slot (21). The pressure strip is rotatably connected to the side plate (2) and can cover the opening of the second slot (21).

4. A support device for the bottom end of a diagonal brace according to claim 1, characterized in that, Several of the card slot groups are evenly spaced along the length direction of the base plate (11), and the interval between two adjacent card slot groups is 20mm-50mm.

5. A support device for the bottom end of a diagonal brace according to claim 1, characterized in that, The vertical plate (12) is provided with vertically arranged ribs (121).

6. A support device for the bottom end of a diagonal brace according to claim 5, characterized in that, The rib (121) has a gradually changing structure that is wider at the top and narrower at the bottom.

7. A support device for the bottom end of a diagonal brace according to any one of claims 1-6, characterized in that, The base plate (11), the vertical plate (12), and the two side plates (2) are all made of steel plates spliced ​​together.

8. A support device for the bottom end of a diagonal brace according to claim 7, characterized in that, The thickness of the steel plate is 10mm-20mm.

9. A support device for the bottom end of a diagonal brace according to claim 7, characterized in that, The surfaces of the base plate (11), the vertical plate (12), the two side plates (2) and the limiting component (3) are all provided with a galvanized anti-rust layer.

10. A secondary lining template, characterized in that, It includes a bottom side mold (5) and a diagonal brace (4). The bottom of the diagonal brace (4) is provided with a support device for the bottom end of the diagonal brace as described in any one of claims 1-9. The bottom side mold (5) is used to be installed at the connection between the secondary lining structure (6) to be poured and the arch side wall (71). The diagonal brace (4) is supported between the bottom side mold (5) and the limiting component (3) of the device.

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