Bolt adjusting steel cushion block for cast-in-place beam combined support

Abstract

The utility model discloses a bolt adjusting steel cushion block for a cast-in-place beam combined support, which comprises a steel plate flange cover, a steel plate rectangular box, a flange steel plate and an adjustable bolt, the steel plate rectangular box is arranged at the top end of the steel plate flange cover, and the horizontal projection area of the steel plate rectangular box is smaller than that of the steel plate flange cover; the flange steel plate is installed at the top end of the steel plate rectangular box through an adjustable bolt, the adjustable bolt is used for adjusting the height of the flange steel plate relative to the steel plate rectangular box, and the horizontal projection of the flange steel plate is the same as the horizontal projection of the steel plate rectangular box in size. According to the bolt adjusting steel cushion block for the cast-in-place beam combined support, the single bearing capacity is large, and the construction requirement can be met; the components are high in integrity and can be integrally hoisted; disassembly is convenient, and cyclic utilization can be achieved; when the support is erected, direct contact between the section steel and the steel pipe can be avoided, the contact area is increased, and local pressure bearing of the contact surface is facilitated; when the support is dismounted, the device can be used as a dismounting device.

Description

Technical Field

[0001] The utility model relates to a bolt-adjusting steel pad for a cast-in-situ beam combined bracket, belonging to the technical field of bridge construction. Background Art

[0002] The full-span scaffolding method is currently the most common construction method used in cast-in-place continuous box girders. However, with the rapid advancement of construction technology, single full-span scaffolding can no longer meet the requirements of bridge construction with various complex structures. In recent years, the use of combined scaffolding has emerged in bridge construction, replacing single full-span scaffolding with a single scaffolding method.

[0003] Traditional full-bridge scaffolding has the following disadvantages: the foundation treatment cost is high, the foundation may experience uneven settlement when construction loads are applied; during construction, it cannot meet the traffic needs under the bridge.

[0004] A modular support system is a construction support system constructed using a combination of full-bridge supports, Bailey beams, steel sections, and large-diameter steel pipes. This system offers faster construction and more balanced structural support, improving the stability of the full-bridge support and facilitating construction.

[0005] When using structural steel, large-diameter steel pipes, and other components to construct steel structure supports, direct, localized contact between the structural steel and the pipes is common. To ensure the stability and safety of the support, the local compressive strength of the contact surface must meet regulatory requirements.

[0006] When using steel sections, large-diameter steel pipe columns and other components to erect steel structure supports, in order to ensure that the overall force of the steel structure supports is evenly distributed, the elevation of the top of the support needs to be adjusted to be flush.

[0007] In current cast-in-place beam construction, temporary supports need to be removed when concrete construction is completed. To facilitate the removal of the supports, a removal device needs to be installed on the top of the supports when they are erected. Currently, sand barrels and steel wedges are commonly used as support removal devices. Both have certain advantages, but also have certain disadvantages, such as:

[0008] The sand barrel is easy to unload, but it is heavy and requires lifting equipment to complete installation and disassembly; there is uneven settlement during use, which can easily lead to asynchronous unloading of the bracket and even accidents due to excessive local pressure; if the sand barrel settles too much, it cannot be adjusted to the design elevation.

[0009] High-altitude welding is often used when constructing steel wedge blocks. Not only do construction workers face safety risks when working at height, but the welding quality is also difficult to guarantee. During the dismantling process of the bracket, the steel wedge blocks need to be cut off, and the cut steel wedge blocks cannot be recycled.

[0010] It can be seen that in order to solve the above technical problems, there is an urgent need for a bolt adjustment steel pad for cast-in-place beam composite bracket. Utility Model Content

[0011] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a bolt-adjusted steel pad for a cast-in-place beam composite bracket, which has a large single-bearing capacity and can meet construction requirements; the component has strong integrity and can be hoisted as a whole; it is easy to disassemble and can be recycled; when the bracket is erected, direct contact between the steel section and the steel pipe can be avoided, the contact area is increased, and it is beneficial to the local pressure bearing of the contact surface; when the bracket is disassembled, it can be used as a unloading device.

[0012] In order to achieve the above purpose / solve the above technical problems, the present invention adopts the following technical solutions:

[0013] A bolt adjustment steel pad for a cast-in-place beam combination bracket comprises a steel plate flange cover, a steel plate rectangular box, a flange steel plate and an adjustable bolt, wherein:

[0014] The steel plate rectangular box is mounted on the top of the steel plate flange cover by welding, and the horizontal projection area of ​​the steel plate rectangular box is smaller than the horizontal projection area of ​​the steel plate flange cover;

[0015] The flange steel plate is installed on the top of the steel plate rectangular box through adjustable bolts. The adjustable bolts are used to adjust the height of the flange steel plate relative to the steel plate rectangular box. The horizontal projection of the flange steel plate is the same as the horizontal projection size of the steel plate rectangular box.

[0016] Furthermore, the steel plate rectangular box includes four side steel plates and one top steel plate, wherein:

[0017] The four side steel plates have the same size and model, and the top steel plate and the side steel plates have the same thickness.

[0018] Furthermore, at least six adjustable bolts are provided, and the adjustable bolts are arranged in two rows at equal intervals along two parallel sides of the flange steel plate.

[0019] Furthermore, the thickness of the steel plate flange cover is 30 mm.

[0020] Furthermore, the side steel plate has a width of 400 mm, a height of 20 mm, and a thickness of 30 mm.

[0021] Furthermore, the top steel plate is square with a side length of 500 mm.

[0022] Furthermore, the flange steel plate and the top steel plate have the same size.

[0023] Furthermore, when the steel pad is assembled, a height difference of 3 to 5 threads is reserved between the flange steel plate and the top steel plate.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The bolt-adjustable steel pads provided by this utility model for cast-in-situ beam combination supports are installed on top of the large-diameter steel pipe support via a steel plate flange cover after the large-diameter steel pipe support is erected. The top elevation of the flange steel plate is leveled using adjustable bolts, and the steel section is supported on the flange steel plate. This avoids direct contact between the steel section and the steel pipe, increases the contact area, and facilitates local pressure bearing on the contact surface. To facilitate the subsequent removal of the support, a height difference of 3 to 5 threads can be reserved between the top steel plate and the flange steel plate. When the support needs to be removed after the cast-in-situ beam construction is completed, the flange steel plate of each steel pad is slightly adjusted downward using adjustable bolts to achieve normal separation of the combination support from the beam body.

[0026] The bolt-adjusted steel pads for the cast-in-situ beam composite bracket provided by the utility model have a large single load-bearing capacity and can meet construction requirements; the components have strong integrity and can be hoisted as a whole; they are easy to disassemble and can be recycled; when the bracket is erected, direct contact between the steel section and the steel pipe can be avoided, the contact area is increased, and it is beneficial to the local pressure bearing of the contact surface; when the bracket is disassembled, it can be used as a unloading device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a bolt-adjusted steel pad for a cast-in-place beam assembly support provided in Example 1;

[0028] Figure 2 yes Figure 1 The schematic front view of the structure of the bolt adjustment steel pad for the cast-in-situ beam composite support is shown;

[0029] Figure 3 yes Figure 1 The schematic diagram of the side structure of the bolt adjustment steel pad used for the cast-in-place beam composite support is shown.

[0030] In the figure: 1. Steel plate flange cover; 2. Steel plate rectangular box; 3. Flange steel plate; 4. Adjustable bolt; 5. Side steel plate; 6. Top steel plate. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances. Example 1

[0034] like Figures 1 to 3 As shown, this embodiment provides a bolt adjustment steel pad for cast-in-place beam assembly support, including a steel plate flange cover 1, a steel plate rectangular box 2, a flange steel plate 3 and an adjustable bolt 4, wherein:

[0035] The steel plate rectangular box 2 is installed on the top of the steel plate flange cover 1, and the horizontal projection area of ​​the steel plate rectangular box 2 is slightly smaller than the horizontal projection area of ​​the steel plate flange cover 1; the steel plate rectangular box 2 can provide a horizontal supporting surface for the steel plate flange cover 1. When the steel plate flange cover 1 bears pressure and transmits it to the steel pipe, the steel plate rectangular box 2 can increase the contact area, evenly distribute stress, and prevent local excessive pressure from causing structural damage.

[0036] The flange steel plate 3 is installed on the top of the steel plate rectangular box 2 through an adjustable bolt 4. The adjustable bolt 4 is used to adjust the height of the flange steel plate 3 relative to the steel plate rectangular box 2. The horizontal projection of the flange steel plate 3 is the same as the horizontal projection size of the steel plate rectangular box 2.

[0037] In the above technical solution, the bolt-adjustable steel pads for the cast-in-situ beam composite bracket provided in this embodiment are installed on the top of the steel pipe via the steel plate flange cover 1 after the large-diameter steel pipe bracket is erected. The top elevation of the flange steel plate 3 is leveled using the adjustable bolts 4. The steel section is supported on the flange steel plate 3, which avoids direct contact between the steel section and the steel pipe, increases the contact area, and is beneficial to the local pressure bearing of the contact surface. In order to facilitate the subsequent removal of the bracket, a height difference of 3 to 5 threads can be reserved between the top steel plate 6 and the flange steel plate 3. When the bracket needs to be removed after the cast-in-situ beam construction is completed, the flange steel plate 3 of each steel pad is fine-tuned downward using the adjustable bolts 4 to achieve normal separation of the composite bracket from the beam body. Example 2

[0038] The bolt adjustment steel pad for a cast-in-place beam assembly support provided in this embodiment differs from the bolt adjustment steel pad for a cast-in-place beam assembly support provided in Example 1 in that:

[0039] Furthermore, the steel plate rectangular box 2 includes four side steel plates 5 and a top steel plate 6, wherein:

[0040] The four side steel plates 5 have the same size and model, and the top steel plate 6 and the side steel plates 5 have the same thickness.

[0041] Furthermore, at least six adjustable bolts 4 are provided, and the adjustable bolts 4 are arranged in two rows at equal intervals along two parallel sides of the flange steel plate 3 .

[0042] The thickness of the steel plate flange cover 1 is 30 mm.

[0043] The side steel plate 5 has a width of 400 mm, a height of 20 mm, and a thickness of 30 mm.

[0044] The top steel plate 6 is square with a side length of 500 mm.

[0045] The flange steel plate 3 and the top steel plate 6 have the same size.

[0046] When the steel pad is assembled, a height difference of 3 to 5 threads is reserved between the flange steel plate 3 and the top steel plate 6 .

[0047] The steel plate flange cover 1 can be made of a 30mm thick square flange, the specifications of which should be coordinated with the specifications of the square flange connector on the top of the steel pipe column below it. The side and top steel plates of the steel plate rectangular box are both 30mm thick. The height of the side steel plates is generally 20cm. The width of the side steel plates can be determined according to the outer diameter of the steel pipe column. When the outer diameter of the steel pipe column is 600mm, it can generally be 400mm. The top steel plate is square, and its dimensions should be coordinated with the width of the side steel plates. When the width of the side steel plate is 400mm, its side length can be 500mm. The size of the flange steel plate stacked above the top steel plate is the same as that of the top steel plate. Adjustable bolts are arranged in two rows with equal spacing along the two parallel sides of the flange steel plate, with at least 6 bolts. Tests have shown that the above structure can withstand loads exceeding 175 tons, fully meeting construction requirements.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A bolt adjustment steel pad for a cast-in-place beam assembly support, characterized in that: It comprises a steel plate flange cover (1), a steel plate rectangular box (2), a flange steel plate (3) and an adjustable bolt (4), wherein: The steel plate rectangular box (2) is mounted on the top of the steel plate flange cover (1) by welding, and the horizontal projection area of ​​the steel plate rectangular box (2) is smaller than the horizontal projection area of ​​the steel plate flange cover (1); The flange steel plate (3) is mounted on the top of the steel plate rectangular box (2) via an adjustable bolt (4). The adjustable bolt (4) is used to adjust the height of the flange steel plate (3) relative to the steel plate rectangular box (2). The horizontal projection of the flange steel plate (3) is the same size as the horizontal projection of the steel plate rectangular box (2).

2. The bolt adjustment steel pad for cast-in-situ beam assembly support according to claim 1, characterized in that: The steel plate rectangular box (2) comprises four side steel plates (5) and a top steel plate (6), wherein: The four side steel plates (5) have the same size, and the top steel plate (6) and the side steel plates (5) have the same thickness.

3. The bolt adjustment steel pad for cast-in-situ beam assembly support according to claim 1, characterized in that: At least six adjustable bolts (4) are provided, and the adjustable bolts (4) are arranged in two rows at equal intervals along two parallel sides of the flange steel plate (3).

4. The bolt adjustment steel pad for cast-in-situ beam assembly support according to claim 2, characterized in that: The thickness of the steel plate flange cover (1) is 30 mm.

5. The bolt adjustment steel pad for cast-in-situ beam assembly support according to claim 4, characterized in that: The side steel plate (5) has a width of 400 mm, a height of 20 mm, and a thickness of 30 mm.

6. The bolt adjustment steel pad for cast-in-situ beam assembly support according to claim 5, characterized in that: The top steel plate (6) is square with a side length of 500 mm.

7. The bolt adjustment steel pad for cast-in-situ beam assembly support according to claim 6, characterized in that: The flange steel plate (3) and the top steel plate (6) have the same size.

8. The bolt adjustment steel pad for cast-in-situ beam assembly support according to claim 1, characterized in that: When the steel pad is assembled, a height difference of 3 to 5 threads is reserved between the flange steel plate (3) and the top steel plate (6).

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