Template structure of thin-wall hollow pier

Abstract

The utility model relates to a template structure of a thin-wall hollow pier, which comprises a foundation body, a tower crane arranged on the foundation body, piers mounted on two sides of the tower crane, bearing plates arranged in inner cavities of the piers, a derrick arranged on the bearing plates, an operating platform arranged at the upper ends of the piers, and a template arranged on the operating platform. An oil press is installed on the upper end face of the operation platform, a jack is installed on the lower end face of the operation platform, the upper end of the derrick is connected with the upper end of a traction rod, and the lower end of the traction rod is connected with the jack. The tower crane is arranged between the thin-wall hollow bridge piers, the thin-wall hollow bridge piers are cast on the operation platform through the mold, a scaffold does not need to be additionally erected, investment of the scaffold and a wood formwork is greatly reduced, the formwork turnover technology is applied to the construction technology of the hollow bridge piers, the construction process of the hollow bridge piers is greatly simplified, and construction efficiency is improved. Compared with the prior art that complicated scaffolds need to be built on the inner side and the outer side of the hollow pier, the construction workload and the construction difficulty are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a template structure of a thin-walled hollow pier. Background Art

[0002] At present, most bridge main piers are designed as thin-walled hollow structures. The appearance of thin-walled hollow piers is similar to that of gravity piers. Compared with solid piers, the hollow piers have a cavity inside, which effectively reduces the amount of concrete and the reinforcement. The deadweight of the pier is greatly reduced, but the bearing capacity of the pier can still be effectively guaranteed. Hollow thin-walled piers are suitable for piers with higher pier heights because they have a larger torsional inertia moment, so they have better stability when used in high piers, and are therefore widely used in bridge construction.

[0003] The patent number is CN202010454018.4, the application date is 2020-05-26, and it discloses a pier body reinforcement construction method; it includes the following steps: construction preparation, excavation of the foundation of the pier, erection of scaffolding, roughening of the pier body, drilling positioning and layout, drilling holes in the pier body and the pier, planting reinforcement of the pier body and the pier, binding of facing steel bars, assembly and adjustment of formwork, mixing and transportation of concrete, pouring of concrete, concrete maintenance, removal of formwork, and post-concrete maintenance.

[0004] The above patent uses wooden formwork to reinforce bridge piers, which reduces construction costs. The formwork is easy to assemble and easy to hoist. It is suitable for the reinforcement construction of rectangular piers of existing railway bridges in operation. The formwork strength meets the requirements, and it is flexible to disassemble and easy to carry, providing good conditions for rapid work cycles. However, as the height of the pier increases, it is necessary to continuously build up scaffolding inside the pier, which seriously affects the construction efficiency of the pier. The use of scaffolding for formwork construction requires a large amount of construction materials, a long construction period, a lot of labor input, low efficiency, and high costs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a movable overturning mold structure for a pier of a cross-river bridge, which has the effect of reducing the construction cost of the pier concrete construction.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A template structure for a thin-walled hollow pier comprises a basic body, a tower crane is arranged on the basic body, bridge piers are installed on both sides of the tower crane, a load-bearing plate is arranged in the inner cavity of the bridge pier, a derrick is arranged on the load-bearing plate, an operating platform is placed on the upper end of the bridge pier, a hydraulic press is installed on the upper end surface of the operating platform, a jack is installed on the lower end surface, the upper end of the derrick is connected to the upper end of a traction rod, and the lower end of the traction rod is connected to the jack.

[0008] A mold is also placed on the upper end of the pier, and the mold includes an inner mold frame and an outer mold frame. The inner mold frame and the outer mold frame are connected together by a pull rod to form a closed mold.

[0009] The tower crane is connected to the foundation body through a tower foot. There are two piers. The tower crane is arranged between the two piers. The operating platform is arranged around the mold.

[0010] A guide rail is arranged on the derrick, a guide tube is movably arranged on the guide rail, the guide tube is fixedly connected to the operating platform, an internal threaded hole is arranged on the guide tube, and a bolt is arranged in the threaded hole.

[0011] The beneficial effects of the utility model are:

[0012] 1. By setting up tower cranes between thin-walled hollow piers, thin-walled hollow piers are cast on the operating platform through molds, without the need to set up additional scaffolding, which greatly reduces the investment in scaffolding and wooden formwork. The application of mold turning technology in the construction technology of hollow piers greatly simplifies the construction process of hollow piers. Compared with the previous need to build complicated scaffolding on the inner and outer sides of the hollow piers, the construction workload and construction difficulty are greatly reduced.

[0013] 2. Assemble or disassemble the inner and outer formwork frames through the tie rods. After constructing a certain height of the thin-walled hollow pier, start the piston part of the jack through the hydraulic press to push up, drive the operating platform and the mold to rise along the traction rod, and after rising to the top of the thin-walled hollow pier, when the inner and outer formwork frames are locked by the tie rods, pour concrete into the cavity surrounded by the mold to complete the construction of this section of the pier. Repeat the above operations to quickly complete the construction of the pier body. During this period, the construction workers do not need to build scaffolding in the inner cavity of the pier body, which greatly improves the construction efficiency of the pier body and significantly shortens the construction period of the pier.

[0014] 3. After constructing a thin-walled hollow pier of a certain height, the lifting jack is started by the hydraulic press to drive the operating platform to rise along the traction rod. The bolts and guide rails on the guide tube control the rising height and balance the stable operating platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a top view of the operating platform;

[0017] As shown in the figure: 1-foundation body; 2-tower crane; 3-bridge pier; 4-load-bearing plate; 5-derrick; 6-guide rail; 7-operating platform; 8-hydraulic press; 9-jack; 10-traction rod; 11-inner formwork; 12-outer formwork; 13-pull rod; 14-guide tube; 15-bolt; 16-tower foot; 17-fence; 18-construction materials. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figures 1 to 2 As shown, a template structure of a thin-walled hollow pier includes a basic body 1, a tower crane 2 is arranged on the basic body 1, bridge piers 3 are installed on both sides of the tower crane 2, the inner cavity of the bridge pier 3 is provided with a load-bearing plate 4, a derrick 5 is arranged on the load-bearing plate 4, an operating platform 7 is placed on the upper end of the pier 3, an oil hydraulic press 8 is installed on the upper end surface of the operating platform 7, and a jack 9 is installed on the lower end surface, the upper end of the derrick 5 is connected to the upper end of the traction rod 10, and the lower end of the traction rod 10 is connected to the jack 9.

[0020] A mold is also placed at the upper end of the pier 3, and the mold includes an inner mold frame 11 and an outer mold frame 12. The inner mold frame 11 and the outer mold frame 12 are connected together by a pull rod 13 to form a closed mold. The hydraulic press 8 is connected to the jack 9 through an oil pipeline.

[0021] The tower crane 2 is connected to the foundation body 1 through a tower foot 16 . There are two piers 3 . The tower crane 2 is arranged between the two piers 3 . The operating platform 7 is arranged around the mold.

[0022] The derrick 5 is provided with a guide rail 6 , on which a guide tube 14 is movably provided. The guide tube 14 is fixedly connected to the operating platform 7 , and an internal threaded hole is provided on the guide tube 14 , in which a bolt 15 is provided.

[0023] The operating platform 7 is provided with a fence 17, the tower crane 2 is provided with a ladder from top to bottom, the load-bearing plates 4 are multi-layered, and support rods are provided between the load-bearing plates 4.

[0024] After the piled foundation body 1 is constructed, the tower crane 2 is directly installed between the two thin-walled hollow piers 3 to be constructed, and the tower foot 16 is directly buried in the foundation body 1. This avoids the conventional construction of a tower crane foundation on the riverbed, saving costs.

[0025] A derrick 5 of a certain height is installed in the thin-walled hollow pier 3. The derrick 5 is connected and fixed to the inner wall together with the load-bearing plate 4. As the construction section of the pier 3 rises, the support rods are started and erected between the load-bearing plates 4. The derrick 5 is composed of multiple derrick sections, which are continuously transferred from the bottom to the top to ensure the fixed height of the derrick 5.

[0026] The inner formwork frame 11 is connected to the upper part of the outer formwork frame 12 by pulling, and the lower formwork frames are respectively formed into a closed shape.

[0027] After the thin-walled hollow pier 3 of a certain height is constructed, the piston of the jack 7 is started to extend upward by the hydraulic press 8, and the piston drives the operating platform 7 to rise along the traction rod 10. The bolts on the guide tube 14 and the guide rail 6 control the rising height and balance the operating platform 7.

[0028] Specifically, a fence 17 is provided around the operating platform 7 .

[0029] As the height of the tower crane 2 increases, a load-bearing plate 4 is installed between the tower crane 2 and the bridge pier 3. People can reach the operating platform 7 from a ladder, and construction materials 18 are transported to the construction area by the tower crane.

[0030] The upper end of the traction rod 10 is fixed to the top of the derrick 5, and the traction rod 10 extends downward through the operating platform 17 and is sleeved with a jack 9. A base is movably arranged on the traction rod 10, and the fixing point of the jack 9 is connected to the base. The telescopic end contacts the lower end surface of the operating platform 17, and the base is fixed to the traction rod 10 by tightening the screws. The jack 9 extends to push the operating platform 17 upward, and the guide tube 14 on the operating platform 17 moves upward along the guide rail 6. After moving to a certain distance, the bolt 15 fixes the guide tube 14 on the guide rail 6, thereby fixing the operating platform 17, and then loosens the screws so that the base can slide on the traction rod 10, and the jack 9 contracts, driving the base to slide in the direction of the operating platform 17. After the jack 9 is retracted, the base is then fixed to the guide rail 6, and the bolt 15 is loosened so that the guide tube 14 can slide, and then the jack 9 is started to extend to push the operating platform 17 upward, thereby pushing inward, thereby moving the operating platform 17 step by step to the construction position and stopping.

[0031] The hydraulic cylinder A7 extends to push the slide pad 5, and the track wheel 4 rolls along the track 6. The slide pad 5 drives the diamond frame 3 to move outward. After moving a certain distance, the slide seat 8 on the hydraulic cylinder A7 is released, and the hydraulic cylinder A7 is retracted to drive the slide seat 8 to slide in the direction of the movement of the diamond frame 3. After the hydraulic cylinder A7 is retracted, the slide seat 8 is fixed on the guide rod 6, and the hydraulic cylinder A7 is started to extend and push the diamond frame 3 to move, so that the diamond frame 3 is moved to the construction position step by step and then stops.

[0032] By arranging a tower crane between the thin-walled hollow piers 3, the thin-walled hollow piers are cast on the operating platform 7 through a mold, without the need to set up a separate scaffolding, which greatly reduces the investment in scaffolding and wooden formwork. The mold turning technology is applied to the construction technology of the hollow piers, which greatly simplifies the construction process of the hollow piers. Compared with the previous need to build complicated scaffolding on the inner and outer sides of the hollow piers, the construction workload and construction difficulty are greatly reduced.

[0033] The inner formwork 11 and the outer formwork 12 are assembled or disassembled by the pull rod. After the construction of a certain height of the thin-walled hollow pier 3 is completed, the piston part of the jack 9 is started by the hydraulic press 8 to push up, driving the operating platform 7 and the mold to rise along the traction rod 10. After rising to the top of the thin-walled hollow pier 3, when the inner formwork 11 and the outer formwork 12 are locked by the pull rod 13, concrete is poured into the cavity surrounded by the mold to complete the construction of this section of the pier. Repeating the above operation can quickly complete the construction of the pier body. During the period, the construction workers do not need to build scaffolding in the inner cavity of the pier body, thereby greatly improving the construction efficiency of the pier body and significantly shortening the construction period of the pier. The traction rod 10 is fixedly connected to the base of the jack 9, and the piston on the base contacts the lower end surface of the operating platform 7.

[0034] After the construction of a thin-walled hollow pier of a certain height is completed, the lifting jack 9 is started by the hydraulic press 8 to drive the operating platform 7 to rise along the traction rod 10, and the bolts on the guide tube 14 and the guide rail 6 control the rising height and balance the stable operating platform.

[0035] By directly burying the tower foot 16 into the foundation body 1, the conventional construction of a tower crane foundation on the riverbed is avoided, which saves costs. The operators can lift and lower on the operating platform, install the mold and cast the piers, avoiding the cumbersome process of repeatedly assembling and disassembling the template after each rise in traditional construction, and effectively improving the construction efficiency.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A template structure for a thin-walled hollow pier, comprising a foundation body (1), characterized in that: A tower crane (2) is arranged on the base body (1), piers (3) are installed on both sides of the tower crane (2), a load-bearing plate (4) is arranged in the inner cavity of the pier (3), a derrick (5) is arranged on the load-bearing plate (4), an operating platform (7) is placed on the upper end of the pier (3), a hydraulic press (8) is installed on the upper end surface of the operating platform (7), and a jack (9) is installed on the lower end surface, the upper end of the derrick (5) is connected to the upper end of a traction rod (10), and the lower end of the traction rod (10) is connected to the jack (9).

2. A template structure for a thin-walled hollow pier as claimed in claim 1, characterized in that: A mold is also placed at the upper end of the pier (3), and the mold comprises an inner mold frame (11) and an outer mold frame (12). The inner mold frame (11) and the outer mold frame (12) are connected together through a pull rod (13) to form a closed mold.

3. A template structure for a thin-walled hollow pier as claimed in claim 2, characterized in that: The tower crane (2) is connected to the foundation body (1) via a tower foot (16); there are two piers (3); the tower crane (2) is arranged between the two piers (3); and the operating platform (7) is arranged around the mold.

4. A template structure for a thin-walled hollow pier as claimed in claim 1, characterized in that: The derrick (5) is provided with a guide rail (6), a guide tube (14) is movably provided on the guide rail (6), the guide tube (14) is fixedly connected to the operating platform (7), an internal threaded hole is provided on the guide tube (14), and a bolt (15) is provided in the threaded hole.

5. The formwork structure of a thin-walled hollow pier according to claim 1, characterized in that: The operating platform (7) is provided with a fence (17), the tower crane (2) is provided with a ladder from top to bottom, the load-bearing plates (4) are multi-layered, and support rods are provided between the load-bearing plates (4).

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