Double-layer high-speed long-span bridge pier reinforcement cage component prefabricated installation device

Abstract

This utility model relates to the field of highway bridge construction and discloses a modular installation device for the reinforcing cage of a double-layer high-speed long-span bridge pier. The device includes a modular reinforcing cage and a main reinforcement positioning device. The modular reinforcing cage comprises multiple reinforcing bars, each arranged in parallel. The main reinforcement positioning device is installed at both ends of the modular reinforcing cage. The main reinforcement positioning device includes multiple double-layer positioning plates, with one double-layer positioning plate installed at each end of the modular reinforcing cage. Each positioning plate has multiple main reinforcement insertion holes, and the end of each reinforcing bar is installed in one of these holes. The main reinforcement insertion holes on each positioning plate are aligned. The end of each reinforcing bar is fixed in the main reinforcement insertion hole by a conical sleeve nut. Each double-layer positioning plate has multiple leveling bubbles and multiple lifting lugs.

Description

Technical Field

[0001] This utility model relates to the field of highway bridge construction technology, and in particular to a modular installation device for the steel cage of double-layer high-speed long-span bridge piers. Background Technology

[0002] With the increasing scale and difficulty of engineering construction, bridge engineering is showing a clear trend towards higher piers, longer spans, and multi-story structures. Traditional loose rebar binding techniques are no longer sufficient to meet the requirements of standardized construction due to the difficulty in controlling construction quality and safety. This is especially true for the construction of double-layer and long-span bridge piers, where the control of rebar binding spacing is more stringent and the requirements for construction quality are extremely high. In addition, traditional rebar binding construction faces a series of related problems, such as the need for a large number of high-altitude workers, long working hours, difficulty in controlling project milestones, and the resulting construction cost challenges.

[0003] Addressing a series of problems inherent in traditional rebar tying techniques, and driven by national and local policies, modular rebar construction has gradually become a development trend in industries such as construction and highways. Modular rebar construction technology has been extensively applied in the construction of reinforced highway bridges, demonstrating significant effectiveness in improving construction efficiency and quality, reducing safety risks, and promoting the digital and intelligent transformation of the industry. Currently, with the continuous promotion of modular rebar construction technology, more and more construction companies are adopting it, and traditional modular rebar construction techniques are gradually maturing and improving. However, further promotion in diverse engineering structures still faces some challenges, such as the inability to effectively guarantee the spacing of main rebars and the pass rate of protective layers, the high requirements for the operational level and proficiency of technicians in achieving precise and effective connections between rebar components, and the need for further improvement of relevant standards and specifications. Utility Model Content

[0004] The purpose of this application is to provide a modular installation device for the steel cage of double-layer high-speed long-span bridge piers, addressing the technical deficiencies existing in the prior art.

[0005] The technical solution adopted to achieve the purpose of this application is:

[0006] A modular installation device for the steel reinforcement cage of a double-layer high-speed long-span bridge pier includes a modular steel reinforcement cage and a main reinforcement positioning device. The modular steel reinforcement cage includes multiple steel bars, each of which is arranged in parallel. The main reinforcement positioning device is installed at both ends of the modular steel reinforcement cage.

[0007] The main reinforcement positioning device includes multiple double-layer positioning plates, with one double-layer positioning plate installed at each end of the modular steel reinforcement cage; each positioning plate is provided with multiple main reinforcement insertion holes, and the end of each steel bar is installed in the main reinforcement insertion hole; the main reinforcement insertion holes on each positioning plate are on the same straight line; the end of each steel bar is fixed in the main reinforcement insertion hole by a conical sleeve nut; each double-layer positioning plate is provided with multiple leveling bubbles; and each double-layer positioning plate is provided with multiple lifting lugs.

[0008] In the above technical solution, the length of each steel bar is 3m-5m.

[0009] In the above technical solution, the two positioning plates of each double-layer positioning plate are connected by 2N connecting rods, where N≥1, and every two connecting rods and the positioning plate form a triangle.

[0010] In the above technical solution, the front end of the tapered sleeve nut is tapered, and the front end of the tapered sleeve nut is tightened in the main rib insertion hole of each positioning plate.

[0011] In the above technical solution, the tail end of the conical sleeve nut is polygonal or cylindrical. When the conical sleeve nut is cylindrical, the tail end of the conical sleeve nut is provided with a hole for inserting a tightening tool.

[0012] In the above technical solution, each reinforcing bar has external threads at both ends, and the tapered sleeve nut has internal threads, and the tapered sleeve nut is threadedly connected to the reinforcing bar.

[0013] In the above technical solution, each positioning plate is a frame structure made of steel plate with a thickness of 1.5cm-2.5cm, which is processed and welded.

[0014] In the above technical solution, the number of leveling bubbles on the double-layer positioning plate is 2, and the two leveling bubbles are installed on two adjacent sides of the positioning plate.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. The main reinforcement positioning device of this utility model can ensure effective connection between each steel bar of the modular steel cage, and can also solve the problem of deformation of components during transportation, which can effectively improve the quality of the steel cage and the efficiency of on-site installation.

[0017] 2. Each positioning plate of this utility model is equipped with a leveling bubble, which can effectively solve the problem of unqualified verticality of the starting section and the first section of the pier body.

[0018] 3. Each steel bar of this utility model is fixed in the main reinforcement insertion hole by a conical sleeve nut. The top of the conical sleeve nut is tightened in the main reinforcement insertion hole to fix the modular steel cage and prevent the modular steel cage from deforming during transportation or hoisting. The conical sleeve nut can be unscrewed from the steel bar, so that the single-layer positioning plate and the double-layer positioning plate can be reused. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the spatial structure of the prefabricated installation device for the steel cage of the first double-layer high-speed long-span bridge pier described in this utility model.

[0021] Figure 2 This is a schematic diagram of the planar structure of the main reinforcement positioning device described in this utility model.

[0022] Figure 3 This is a right-side structural schematic diagram of the main reinforcement positioning device described in this utility model.

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the tapered nut described in this utility model.

[0024] In the diagram: 1- modular steel cage, 101- steel bar, 102- tie wire, 2- main reinforcement positioning device, 201- double-layer positioning plate, 2011- leveling bubble, 2012- main reinforcement insertion hole, 2013- lifting lug, 2014- connecting rod, 3- conical sleeve nut. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0026] A modular installation device for the steel cage of a double-layer high-speed long-span bridge pier, see [link / reference]. Figure 2The system includes a prefabricated steel reinforcement cage 1 (the prefabricated steel reinforcement cage 1 is a prefabricated component, which is bound into shape using a binding jig) and a main reinforcement positioning device 2. The prefabricated steel reinforcement cage 1 includes multiple steel bars 101, each steel bar 101 arranged in parallel. The main reinforcement positioning device 2 is installed at both ends of the prefabricated steel reinforcement cage 1 to stabilize it and prevent deformation during transportation or hoisting. The length of each steel bar 101 is 3m-5m (preferably 4m).

[0027] See Figure 3 The main reinforcement positioning device 2 includes multiple double-layer positioning plates 201, with one double-layer positioning plate 201 installed at each end of the modular steel cage 1. Each positioning plate has multiple main reinforcement insertion holes 2012, and the end of each steel bar 101 is installed in the main reinforcement insertion hole 2012. The two positioning plates of each double-layer positioning plate 201 are connected by 2N connecting rods 2014, where N≥1. Every two connecting rods 2014 form a triangle with the positioning plate to ensure the stability of the double-layer positioning plate 201. The main reinforcement insertion holes 2012 on each positioning plate are on the same straight line, ensuring that each steel bar 101 is parallel to each other after being installed in the main reinforcement insertion hole 2012.

[0028] The end of each reinforcing bar 101 is fixed in the main reinforcing bar insertion hole 2012 by a conical sleeve nut 3, thereby fixing both ends of the modular reinforcing cage 1 to the double-layer positioning plate 201, thus stabilizing the reinforcing bars 101 and preventing deformation of the modular reinforcing cage 1 during transportation or hoisting. See also Figure 4 The front end of the conical sleeve nut 3 is conical, and the front end of the conical sleeve nut 3 is tightened in the main reinforcement insertion hole 2012 of each positioning plate to ensure that the reinforcing bar 101 is in the center position of the main reinforcement insertion hole 2012; the tail end of the conical sleeve nut 3 is polygonal or cylindrical. When the conical sleeve nut 3 is cylindrical, the tail end of the conical sleeve nut 3 is provided with a hole for inserting a tightening tool into the hole, thereby tightening the conical sleeve nut 3 onto the reinforcing bar 101 and tightening its front end in the main reinforcement insertion hole 2012, thereby fixing the modular reinforcing cage 1 to the positioning plate. Each reinforcing bar 101 has external threads at both ends, and the tapered sleeve nut 3 has internal threads. When the two ends of the reinforcing bar 101 are installed in the main reinforcing bar insertion hole 2012 of the positioning plate, the tapered sleeve nut 3 is tightened on both ends of the reinforcing bar 101, so that the tapered sleeve nut 3 is threadedly connected to the reinforcing bar 101.

[0029] See Figure 4Each double-layer positioning plate 201 is equipped with multiple leveling bubbles 2011. By observing the positional changes of the bubbles in the liquid under gravity, the problem of substandard verticality in the initial section of the pier and each section of the pier body can be effectively solved. The shape and size of each positioning plate are designed with reference to the cross-sectional dimensions of the pier. In this embodiment, each positioning plate is a frame structure formed by processing and welding steel plates with a thickness of 1.5cm-2.5cm (preferably 2cm). The preferred number of leveling bubbles 2011 on the double-layer positioning plate 201 in this embodiment is two, with two leveling bubbles 2011 installed on two adjacent sides of the positioning plate (i.e., leveling bubbles 2011 are provided in both the horizontal and vertical directions of the positioning plate to level the positioning plate and adjust the verticality of the modular reinforcing bars).

[0030] See Figure 1 , Figure 4 Each double-layer positioning plate 201 is equipped with multiple lifting lugs 2013 for connecting with hoisting equipment to hoist and transport the modular steel cage 1.

[0031] A modular installation method for the steel cage of a double-layer high-speed long-span bridge pier includes the following steps:

[0032] Step 1: Using a binding frame, the modular steel reinforcement cage 1 is bound into shape (using binding wire 102 to bind the modular steel reinforcement cage 1). The single-layer positioning plate and the double-layer positioning plate 201 are respectively installed at both ends of the modular steel reinforcement cage 1. (When installing the first section of the modular steel reinforcement cage 1, one end is a double-layer positioning plate 201, and the other end is a single-layer positioning plate. This is mainly because the lower end of the steel reinforcement cage needs to be connected to the embedded reinforcement on the pile foundation. Therefore, a single-layer positioning plate is needed to correct the embedded reinforcement and adjust its verticality, while a double-layer positioning plate...) The double-layer frame structure of the positioning plate makes it inconvenient to manually adjust the verticality of the embedded reinforcement bars. Therefore, a single-layer positioning plate is used. When installing the next section of the modular reinforcement cage, the single-layer positioning plate can be replaced with a double-layer positioning plate 201. The end of the reinforcement bar 101 is fixed in the main reinforcement insertion hole 2012 using a conical sleeve nut 3. This fixes both ends of the modular reinforcement cage 1 to the positioning plate, stabilizing the reinforcement bar 101 and preventing deformation of the modular reinforcement cage 1 during transportation or hoisting.

[0033] Step 2: Using hoisting equipment (connected to the lifting lugs 2013 on the single-layer positioning plate and double-layer positioning plate 201), the modular steel cage 1 with the single-layer positioning plate and double-layer positioning plate 201 installed in Step 1 is hoisted and transported to the pile foundation cap position on site. The single-layer positioning plate is removed and placed on the top of the pre-embedded reinforcement of the pile foundation cap (the pre-embedded reinforcement of the pile foundation cap is inserted into the main reinforcement through hole 2012 on the single-layer positioning plate 201). The single-layer positioning plate is leveled and the pre-embedded reinforcement of the cap is verticalized using the leveling bubble 2011 on the single-layer positioning plate. At the same time, the concrete surface of the cap is roughened. Then, the stirrups are tied, the formwork is erected, the concrete is poured, and the concrete is cured to form the starting section of the pier column.

[0034] Step 3: Remove the single-layer positioning plate from the top of the pre-embedded reinforcement bar of the pier cap. Fix the removed single-layer positioning plate to the end of the modular reinforcement cage 1 in Step 1 using the conical sleeve nut 3. Vertically hoist the modular reinforcement cage 1 to the top of the starting section of the pier column. Remove the single-layer positioning plate and fix the modular reinforcement cage 1 to the starting section of the pier column (the modular reinforcement cage 1 and the starting section of the pier column are connected by nuts). After connection, use the leveling bubble 2011 on the double-layer positioning plate 201 to level the double-layer positioning plate 201 and adjust the verticality of the modular reinforcement cage 1. Then tie the stirrups, support the formwork, pour the concrete, and cure it to form the first section of the pier column. After the first section of the pier column is formed, remove the double-layer positioning plate 201.

[0035] Step 4: Install the double-layer positioning plates 201 at both ends of the formed modular steel cage 1. Use hoisting equipment to hoist and transport the modular steel cage 1 with the double-layer positioning plates 201 to the pile foundation position on site, and vertically hoist the modular steel cage 1 to the top of the first section of the pier column. Remove the double-layer positioning plates 201 and fix the first section of the pier column to the modular steel cage 1 (the steel bars 101 of the first section of the pier column and the steel bars 101 of the modular steel cage 1 are connected by nuts). After connection, use the leveling bubble 2011 on the double-layer positioning plates 201 to level the double-layer positioning plates 201 and adjust the verticality of the section of modular steel cage 1. At the same time, roughen the surface of the first section of the pier column, then tie the stirrups, support the formwork, pour the concrete, and cure it to form the next section of the pier column. After the section of the pier column is formed, remove the double-layer positioning plates 201.

[0036] Step 5: Repeat step 4 to form the next section of the pier column, until the entire pier column is completed.

[0037] Before each pier section is cast, the surface of the lower pier section that has already been cast should be roughened according to the design requirements.

[0038] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A double-layer high-speed long-span bridge pier column reinforcement cage componentized installation device, characterized in that, The component includes a modular steel reinforcement cage and a main reinforcement positioning device. The modular steel reinforcement cage includes multiple steel bars, each of which is arranged in parallel. The main reinforcement positioning device is installed at both ends of the modular steel reinforcement cage. The main reinforcement positioning device includes multiple double-layer positioning plates, with one double-layer positioning plate installed at each end of the modular steel reinforcement cage; each positioning plate is provided with multiple main reinforcement insertion holes, and the end of each steel bar is installed in the main reinforcement insertion hole; the main reinforcement insertion holes on each positioning plate are on the same straight line; the end of each steel bar is fixed in the main reinforcement insertion hole by a conical sleeve nut; each double-layer positioning plate is provided with multiple leveling bubbles; and each double-layer positioning plate is provided with multiple lifting lugs.

2. The double-deck high-speed long-span bridge pier column reinforcement cage componentized installation device according to claim 1, characterized in that, Each steel bar is 3m-5m long.

3. The double-deck high-speed long-span bridge pier column reinforcement cage componentized installation device according to claim 1, characterized in that, The two positioning plates of each double-layer positioning plate are connected by 2N connecting rods, where N≥1. Each pair of connecting rods and the positioning plate form a triangle.

4. The double-deck high-speed long-span bridge pier column reinforcement cage componentized installation device according to claim 1, characterized in that, The front end of the tapered sleeve nut is tapered, and the front end of the tapered sleeve nut is tightened in the main rib insertion hole of each positioning plate.

5. The modular installation device for the steel cage of a double-layer high-speed long-span bridge pier as described in claim 1, characterized in that, The tail end of the conical sleeve nut is polygonal or cylindrical. When the conical sleeve nut is cylindrical, the tail end of the conical sleeve nut is provided with a hole for inserting a tightening tool.

6. The double-deck high-speed long-span bridge pier column reinforcement cage componentized installation device according to claim 1, characterized in that, Each reinforcing bar has external threads at both ends, and the tapered sleeve nut has internal threads, and the tapered sleeve nut is threadedly connected to the reinforcing bar.

7. The double-deck high-speed long-span bridge pier column reinforcement cage componentized installation device according to claim 1, characterized in that, Each positioning plate is a frame structure made of steel plates with a thickness of 1.5cm-2.5cm, processed and welded together.

8. The double-deck high-speed long-span bridge pier column reinforcement cage componentized installation device according to claim 1, characterized in that, The double-layer positioning plate has two leveling bubbles, which are installed on two adjacent sides of the positioning plate.

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