A bridge high pier construction machine and its construction method

Abstract

This application provides a bridge pier fabrication machine and its construction method. The pier fabrication machine includes lattice columns, a self-lifting device, and a truss platform. The lattice columns are rectangularly distributed around the perimeter of the bridge pier and can be vertically spliced. The self-lifting device is mounted on the lattice columns, and the truss platform is mounted on the self-lifting device. The self-lifting device drives the truss platform to move up and down on the lattice columns. A hanging device is installed on the truss platform, and a casting template is connected to the hanging device. The hanging device is used to lift and lower the casting template. A construction hanger is installed on the truss platform, which serves as a construction platform for workers to operate the casting template. A gantry crane is installed at the top of the truss platform, which can travel along the truss platform to lift and transport reinforcing steel. This invention uses lattice columns as the vertical load-bearing structure, eliminating the need to rely on already constructed pier columns, reducing the strength requirements of the pier column concrete during lifting, and increasing the construction speed.

Description

Technical Field

[0001] This application relates to the technical field of bridge engineering, and in particular to a bridge high pier construction machine and its construction method. Background Technology

[0002] With the advancement of urbanization, urban development relies heavily on highways and bridges, driving improvements in their construction standards. The increasing number of vehicles places higher demands on the quality of highway bridges, significantly increasing the difficulty of constructing high piers. Therefore, ensuring the successful construction of high piers has become paramount in guaranteeing project quality.

[0003] Currently, bridge pier construction typically employs methods such as formwork flipping, slipform, and climbing formwork. These methods have the following main drawbacks:

[0004] (1) All construction methods require the separate installation of tower cranes or other cranes as vertical material transport equipment.

[0005] (2) The construction safety risk is relatively high each time the formwork is raised in the flipping method; due to the early demolding time in the slip form construction, the appearance of the pier column needs to be coated to achieve a relatively smooth surface. If the verticality is not well controlled during construction, phenomena such as cross-sectional torsion will occur.

[0006] (3) All of these methods use the existing piers as support points. The formwork can only be lifted to continue segmental construction after the concrete of the lower pier reaches a certain strength and has the bearing capacity, which limits the construction speed of the piers. Summary of the Invention

[0007] To address the problems existing in the prior art, this application provides a bridge high pier construction machine and its construction method, which integrates vertical self-supporting and construction operation platform, and has the ability to self-lift equipment and lift engineering materials, which can speed up the construction speed and more effectively ensure construction safety and project quality.

[0008] Firstly, the technical solution adopted in this application for a bridge high pier construction machine is as follows:

[0009] A bridge pier construction machine includes lattice columns, a self-lifting device, and a truss platform. The lattice columns are rectangularly distributed around the perimeter of the bridge pier and can be vertically spliced. The self-lifting device is mounted on the lattice columns, and the truss platform is mounted on the self-lifting device. The self-lifting device drives the truss platform to move up and down on the lattice columns. A suspension device is provided on the truss platform, and a casting template is connected to the suspension device. The suspension device is used to lift and lower the casting template. A construction hanger is provided on the truss platform, which serves as a construction platform for workers to perform casting template operations. A gantry crane is provided on the top of the truss platform, and the gantry crane can travel along the truss platform to lift and transport reinforcing bars.

[0010] By adopting the above technical solutions, the lattice columns and truss platform form the main load-bearing system, while the hanging device, construction hanger, and gantry crane form the construction operation system. The main load-bearing system bears the system's own weight, the structure and equipment weight of the construction operation system, the load of construction personnel and equipment, and live loads such as wind loads, and is the main stress-bearing structure of the pier-making machine. This eliminates the need for the vertical load to rely on the already constructed pier columns, reducing the strength requirements of the pier column concrete during lifting and increasing the construction speed. The construction operation system completes the construction work on the high piers of the bridge. The self-lifting device can complete the vertical self-lifting of the pier-making machine without the need to set up a separate tower crane for lifting the pier-making machine.

[0011] A further technical solution of the present invention is that a guide rail is provided on the top of the truss platform, and a roller is rotatably provided on the bottom of the gantry crane, and the roller rolls on the guide rail.

[0012] A further technical solution of the present invention is that the roller is provided with an annular groove, the cross-section of the annular groove is trapezoidal, and the annular groove is adapted to the guide rail.

[0013] By adopting the above technical solution, it is easy for the gantry crane to move on the truss platform and move materials such as steel bars.

[0014] A further technical solution of the present invention is that the hanging device includes an electric hoist, and the electric hoist is connected to the casting template by a hook.

[0015] A further technical solution of the present invention is that the electric hoist can drive a set of casting templates to move along the length direction of the truss platform, thereby causing the casting templates to move along the length direction of the truss platform.

[0016] By adopting the above technical solution, when constructing a double-span bridge, a set of pouring formwork can be moved, reducing the number of pouring formwork sets, lowering the weight of the construction operation system, and reducing certain costs.

[0017] A further technical solution of the present invention is configured such that the construction hanging frame includes a support, a protective net and a handrail ladder, the support is fixed on the truss platform, one end of the protective net is hung on the support and rotatably connected to the support, the other end of the protective net is detachably fixed on the support, and the handrail ladder is hung on the support.

[0018] A further technical solution of the present invention is that the self-lifting device is an electric lifting platform.

[0019] A further technical solution of the present invention is that the lattice column and the truss platform are both assembled from single units.

[0020] By adopting the above technical solutions, the lattice columns and truss platforms assembled from individual units are easy to build and easy to use.

[0021] Secondly, the construction method of the bridge high pier construction machine of this application adopts the following technical solution:

[0022] A construction method for a bridge high pier fabrication machine includes the following steps:

[0023] S1. Based on the location of the bridge piers, construct a bridge pier fabrication machine as described above.

[0024] S2, Reinforcement binding of bridge piers;

[0025] S3. After fixing the casting formwork, pour the concrete.

[0026] S4. After the concrete has hardened, remove the formwork.

[0027] S5. After the lattice columns are spliced ​​and raised, the truss platform is lifted as a whole.

[0028] S6. Repeat steps S2, S3, S4 and S5 until the construction of the bridge piers is completed.

[0029] A further technical solution of the present invention is that, for the construction of a double-span bridge, the hanging device can drive a set of casting templates along the length of the truss platform to move in the length direction of the truss platform.

[0030] Compared with the prior art, this application has the following beneficial effects:

[0031] The bridge pier construction machine designed in this invention integrates vertical self-supporting and construction operation platform, and has the ability to self-lift equipment and lift engineering materials, which can speed up construction and more effectively ensure construction safety and project quality. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of this application;

[0033] Figure 2 This is a schematic diagram of the gantry crane in this application;

[0034] Figure 3 This is a side view of this application;

[0035] Figure 4 This is a schematic diagram of the hanging device in this application;

[0036] Figure 5 This is a schematic diagram of process one of the present application;

[0037] Figure 6 This is a schematic diagram of process two in this application;

[0038] Figure 7 This is a schematic diagram of process three of this application.

[0039] Figure 8 This is a schematic diagram of process four in this application.

[0040] Figure 9 This is a schematic diagram of step five of this application.

[0041] The attached diagram is labeled as follows: 1. Lattice column; 2. Truss platform; 3. Gantry crane; 4. Construction scaffold; 5. Casting formwork; 6. Self-lifting device. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] This application provides a bridge high pier construction machine.

[0044] Reference Figure 1 The bridge pier construction machine includes a lattice column 1, a self-lifting device 6, a truss platform 2, a hanging device, a construction hanger 4, and a gantry crane 3.

[0045] Specifically, the lattice columns 1 are rectangularly distributed around the perimeter of the bridge piers and can be vertically spliced ​​and fixed. Self-lifting devices 6 correspond one-to-one with the lattice columns 1, and are installed on the lattice columns 1. Multiple self-lifting devices 6 synchronously climb up and down and stop on the lattice columns 1. Truss platforms 2 are fixed to the outside of the self-lifting devices 6, and the self-lifting devices 6 drive the truss platforms 2 to move up and down on the lattice columns 1.

[0046] The lattice column 1 and truss platform 2 form the main load-bearing system, which bears the system's own weight, the weight of the construction operation system and equipment, the load of construction personnel and equipment, and live loads such as wind loads. It is the main load-bearing structure of the pier-making machine. The vertical load formed by the lattice column 1 serves as a vertical load-bearing component, eliminating the need to rely on the already constructed piers. This reduces the strength requirements of the pier concrete during lifting and increases the construction speed.

[0047] In this embodiment, both the lattice column 1 and the truss platform 2 are assembled and fixed from individual units, which facilitates assembly and disassembly and achieves the purpose of convenient use.

[0048] A hoisting device is installed on the truss platform 2. This device connects to the casting formwork 5 for the bridge pier and is used to raise and lower the formwork 5 to a suitable position for formwork closure and concrete pouring. A construction hanger 4 is installed on the truss platform 2. This hanger serves as a platform for workers to operate the casting formwork 5 and allows them to access the top of the bridge pier for rebar tying. A gantry crane 3 is installed at the top of the truss platform 2, extending along its width. The gantry crane 3 can travel along the truss platform 2 to lift and transport the rebar.

[0049] The hoisting device, construction frame 4, and gantry crane 3 form a construction operation system. The construction operation system completes the construction work on the high piers of the bridge, which facilitates the rapid construction of the piers without the need to set up tower cranes or other devices to assist in the construction.

[0050] Reference Figure 2 In this embodiment, a guide rail is fixed to the top of the truss platform 2. The guide rail is an I-shaped steel rail. The gantry crane 3 is driven by an electric drive unit to move on the guide rail. The gantry crane 3 is existing technology and will not be described in detail here. Rollers are rotatably installed at the bottom of the gantry crane 3. The rollers have annular grooves with trapezoidal cross-sections. The annular grooves are adapted to the top of the guide rail, and the rollers roll on the guide rail. The rollers and the guide rail form a limiting structure, which facilitates the stable movement of the gantry crane 3 on the truss platform 2 for moving materials such as steel bars.

[0051] In addition, to improve the stability of the gantry crane 3, a limiting structure located in the guide rail groove can be installed on the gantry crane 3. The limiting structure is a rolling wheel structure, which reduces the resistance of the gantry crane 3 when it travels on the guide rail and further prevents the gantry crane 3 from separating from the guide rail.

[0052] In this embodiment, the construction hanger 4 includes a support frame, a protective net, and a handrail ladder.

[0053] The support frame is fixed to the truss platform 2, forming a rectangular frame structure. Multiple layers of steel plates and wire mesh are laid on the support frame, allowing workers to walk on the steel plates and wire mesh, close the casting formwork 5, and tie reinforcing bars on the piers. A safety net is installed on the side of the support frame away from the piers. Both ends of the safety net can be hung on the support frame; one end can be hung on the support frame and rotatably connected to it, while the other end can be detached and fixed to the support frame. The upper and lower ends of the handrail are hung on the wire mesh on the support frame, facilitating the installation of the handrail and allowing workers to move between the upper and lower levels of the support frame.

[0054] Reference Figure 3 and Figure 4The hoisting device includes an electric hoist, which is a wire rope electric hoist or a chain electric hoist in the prior art. The hook device on the electric hoist is connected to the casting template 5 to lift the casting template 5 up and down.

[0055] The pier-making machine in this embodiment is suitable for processing single-span or double-span bridges, and can maximize the speed of construction.

[0056] When processing double-span bridges, casting templates 5 corresponding to the bridge piers can be set on the truss platform 2. This setup results in an excessively heavy overall weight of the construction operation system and increases certain costs.

[0057] To reduce the overall weight of the construction operation system, a set of casting formwork 5 along the length of the truss platform 2 can be driven by an electric hoist to move between the two piers. In comparison, reducing the number of casting formwork 5 sets reduces the weight of the construction operation system and reduces certain costs.

[0058] In this embodiment, the self-lifting device 6 is an electric lifting platform, which is a prior art technology. It is driven by a motor to rotate wheels and crawl on the lattice column 1.

[0059] The bridge pier construction machine designed in this embodiment integrates vertical self-supporting and construction operation platform, and has the ability to lift equipment and hoist engineering materials, which can speed up construction and more effectively ensure construction safety and project quality.

[0060] This application also provides a construction method for a bridge high pier construction machine.

[0061] The construction method for high bridge piers using a pier-making machine includes the following steps:

[0062] S1. Determine the location of the bridge piers according to the drawings, and build a bridge pier construction machine as described above around the bridge piers.

[0063] S2. Using a gantry crane 3, steel bars and other materials are hoisted and used for steel bar binding on top of the bridge piers.

[0064] S3. After the reinforcement is tied, the casting formwork 5 is moved to a suitable height by the hoisting device, the casting formwork 5 is closed and fixed, and concrete is poured into the casting formwork 5.

[0065] S4. After the concrete has hardened, remove the formwork.

[0066] S5. The individual components are spliced ​​and fixed to the top of the lattice column 1. Then, the self-lifting device 6 crawls on the lattice column 1, driving the truss platform 2 to be lifted as a whole, in preparation for the subsequent processing of the bridge piers.

[0067] S6. Repeat steps S2, S3, S4 and S5 until the construction of the bridge piers is completed.

[0068] The above construction methods are applicable to the construction of single-span bridges.

[0069] For the construction of a double-span bridge, while pouring concrete for one side of the pier, the steel reinforcement is tied for the other side of the pier. After the pouring of concrete for both piers is completed, the truss platform 2 is lifted by the self-lifting device 6 to carry out subsequent pouring operations until the pier is completed.

[0070] Specifically, the hoisting device can move a set of casting formwork 5 along the length of the truss platform 2. The construction method is as follows:

[0071] Reference Figure 5 Procedure 1: On the left pier, formwork 5 is assembled and concrete is poured; on the right pier, steel reinforcement is tied.

[0072] Reference Figure 6 Step 2: Once the concrete on the left side has cured to the point where the formwork 5 can be removed, a set of formwork 5 is moved horizontally to the right pier.

[0073] Reference Figure 7 Step 3: Reinforcing steel is tied on the left pier; formwork 5 is poured on the right pier and concrete is poured.

[0074] Reference Figure 8 Step 4: After the concrete on the right side has cured to the level required for formwork removal, the formwork is removed, and a set of formwork is moved horizontally to the left pier.

[0075] Reference Figure 9 Step 5: The lattice column 1 is extended, and the self-lifting device 6 drives the truss platform 2 to be lifted as a whole; the next round of construction is carried out until the construction of the bridge pier is completed.

[0076] The bridge pier construction machine designed in this invention integrates vertical self-supporting and construction operation platform, and has the ability to self-lift equipment and lift engineering materials, which can speed up construction and more effectively ensure construction safety and project quality.

[0077] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A construction method for a bridge high pier fabrication machine, characterized in that, Based on the location of the bridge piers, a bridge pier construction machine is built. The bridge pier construction machine includes a lattice column (1), a self-lifting device (6), and a truss platform (2). The lattice column (1) is rectangularly distributed around the bridge piers and can be spliced ​​vertically. The self-lifting device (6) is set on the lattice column (1), and the truss platform (2) is set on the self-lifting device (6). The self-lifting device (6) drives the truss platform (2) to move up and down on the lattice column (1). A hanging device is set on the truss platform (2), and a casting template (5) is connected to the hanging device. The hanging device is used to lift and lower the casting template (5) and can drive a set of casting templates (5) along the length of the truss platform (2) to move along the length of the truss platform (2), moving between the two bridge piers, and can be used on one side of the bridge. The formwork (5) on the pier is closed and concrete is poured; the steel bars are tied on the other pier, and when the concrete on one side has cured to the condition for removing the formwork (5), a set of formwork (5) is moved horizontally to the other pier by a hoisting device; a construction hanger (4) is set on the truss platform (2), which is a construction platform for workers to operate the formwork (5), and the construction hanger (4) allows workers to enter the top of the pier to tie the steel bars; after the steel bars are tied, the formwork (5) is moved to a suitable height by a hoisting device, the formwork (5) is closed and fixed, and concrete is poured into the formwork (5); a gantry crane (3) is set on the top of the truss platform (2), which can travel along the truss platform (2) to complete the lifting and transportation of the steel bars; For the construction of a double-span bridge, while pouring concrete for one side of the pier, the steel reinforcement is tied for the other side. After the pouring of both piers is completed, the truss platform is lifted by a self-lifting device for subsequent pouring operations until the piers are completed. The hoisting device can move a set of pouring formwork along the length of the truss platform. First, the formwork is poured and closed on the first pier, and concrete is poured. The steel reinforcement is tied for the second pier. Then, after the concrete on the first side has cured to the point where the formwork can be removed, the set of pouring formwork is moved horizontally to the second pier. The steel reinforcement is tied again on the first pier. The formwork is poured and closed on the second pier, and concrete is poured. After the concrete on the first side has cured to the point where the formwork can be removed, the formwork is removed, and the set of formwork is moved horizontally to the first pier. Then, the lattice column is extended, and the self-lifting device lifts the truss platform as a whole. The next cycle of construction is carried out until the high piers of the bridge are completed.

2. The construction method of the bridge high pier construction machine according to claim 1, characterized in that, The top of the truss platform (2) is provided with a guide rail, and the bottom of the gantry crane (3) is provided with a rotatable roller that rolls on the guide rail.

3. The construction method of the bridge high pier construction machine according to claim 2, characterized in that, The roller has an annular groove with a trapezoidal cross-section, and the annular groove is adapted to the guide rail.

4. The construction method of the bridge high pier construction machine according to claim 1, characterized in that, The hanging device includes an electric hoist, which is connected to the casting template (5) via a hook.

5. The construction method of the bridge high pier construction machine according to claim 4, characterized in that, The electric hoist can drive a set of casting templates (5) along the length of the truss platform (2), thereby moving the casting templates (5) along the length of the truss platform (2).

6. The construction method of the bridge high pier construction machine according to claim 1, characterized in that, The construction hanger (4) includes a support, a protective net and a handrail. The support is fixed on the truss platform (2). One end of the protective net is hung on the support and rotatably connected to the support. The other end of the protective net is detachably fixed on the support. The handrail is hung on the support.

7. The construction method of the bridge high pier construction machine according to claim 1, characterized in that, The self-lifting device (6) is an electric lifting platform.

8. The construction method of the bridge high pier construction machine according to claim 1, characterized in that, The lattice column (1) and truss platform (2) are both assembled from single units.

9. The construction method of the bridge high pier construction machine according to claim 1, characterized in that, For the construction of a double-span bridge, the hanging device can drive a set of casting templates (5) along the length of the truss platform (2) to move along the length of the truss platform (2).

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