I-shaped beam UHPC (Ultra High Performance Concrete) permanent template

Abstract

The utility model relates to an I-beam UHPC permanent formwork which comprises a left side formwork and a right side formwork. The left side formwork and the right side formwork are each provided with a reserved bolt connecting hole, a shearing force screw rod hole and a shearing cooperation tooth key. Shearing force screw rods are arranged in the shearing force screw rod holes; the contact area and the friction force between the UHPC formwork and a common concrete material can be increased through the shear cooperation tooth keys; the left side formwork and the right side formwork are connected through a connecting screw rod assembly, and the connecting screw rod assembly is arranged in the reserved bolt connecting hole; the left side template and the right side template are both filled with UHPC materials. And a common concrete material is filled between the left side template and the right side template. Compared with the prior art, the high-load-bearing bridge pier has the advantages of high mechanical property, high construction efficiency, strong durability and the like, and is suitable for scenes with corrosion resistance, rapid construction and high-load-bearing requirements in bridge engineering.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering technical field especially is related to a I beam UHPC permanent form. BACKGROUND

[0002] Offshore bridges are exposed to high humidity and high salinity environments for a long time, and are easily affected by corrosion problems. Steel corrosion and concrete deterioration will not only shorten the service life of the bridge, but also increase the cost of maintenance and repair. In addition, the use and disassembly of the formwork during traditional bridge construction often consumes a large amount of labor hours, affecting the construction efficiency. Especially in the complex marine environment, the operation difficulty of formwork disassembly is greater, and it also brings certain challenges to the safety of construction personnel and the construction progress. Therefore, how to improve the durability of the bridge while improving the construction speed has become a problem to be solved. SUMMARY

[0003] The utility model discloses a I beam UHPC permanent form, which can effectively resist corrosion in marine environment and significantly improve the overall durability of the bridge through the material properties of high strength and high durability. At the same time, this permanent form does not need to be disassembled, reducing the construction process and labor hours, not only improving the construction efficiency, but also reducing the safety hazards caused by formwork disassembly. In addition, the UHPC permanent form works with the bridge structure, which also improves the mechanical properties of the bridge, providing an efficient, durable and safe new solution for future marine bridge construction.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] The utility model provides a I beam UHPC permanent form, which comprises a left side formwork and a right side formwork.

[0006] The left side formwork and the right side formwork are both provided with a reserved bolt connecting hole, a shear screw hole and a shear cooperative tooth key. The shear screw hole is provided with a shear screw. The shear cooperative tooth key can increase the contact area and friction between the UHPC formwork and the ordinary concrete material. When the I beam is subjected to external force, the shear cooperative tooth key can effectively prevent the relative sliding between the UHPC formwork and the concrete, so that they can better bear the load together and improve the overall performance of the structure.

[0007] The left side formwork and the right side formwork are connected by a connecting screw assembly, which is arranged in the reserved bolt connecting hole. The left side formwork and the right side formwork are both filled with UHPC material. The left side formwork and the right side formwork are filled with ordinary concrete material.

[0008] Further, the connecting screw assembly includes a top connecting screw, a middle connecting screw, and a bottom connecting screw.

[0009] Further, the shear screw holes are arranged on the formwork according to a set spacing and arrangement.

[0010] Further, the shear screw holes are used to install shear screws, which are used to enhance the cooperative working capacity between the UHPC formwork and the internal ordinary concrete, and improve the shear performance of the structure. When the I-beam is subjected to shear force, the shear screw can effectively transmit the shear force and prevent relative slip between the UHPC formwork and the concrete, thereby ensuring the stability of the entire I-beam structure.

[0011] Further, the shear screw is cylindrical and has an anchoring structure at the end, such as a hook or a threaded segment, to enhance its anchoring effect in the concrete.

[0012] Further, the shear cooperative tooth key has a trapezoidal shape.

[0013] Further, the shear cooperative tooth keys are evenly distributed on the surface of the formwork and play their cooperative role.

[0014] Further, the reserved bolt connection holes and shear screw holes are provided with hole sealing mortar, which is used to seal the reserved bolt connection holes and shear screw holes to prevent water, air, and harmful substances from entering the holes and causing corrosion to the connecting screw and shear screw, thereby ensuring the durability and reliability of the connecting structure. The hole sealing mortar has good bonding and impermeability, and can be tightly combined with the UHPC formwork and the screw.

[0015] Further, the mixed ordinary concrete material is uniformly injected into the formwork from the bottom to the top by pumping equipment, avoiding the formation of voids or honeycomb structures.

[0016] Further, during the pouring of the ordinary concrete material, a vibrating device is used to vibrate the concrete to ensure its compactness and uniformity.

[0017] The construction method of the I-beam UHPC permanent formwork is as follows:

[0018] S1: According to the design requirements, high-precision molds are used to manufacture the I-beam UHPC permanent formwork to ensure high strength and high durability. During production, shear screw holes and reserved bolt connection holes are reserved for subsequent assembly. After the formwork is processed, it is transported to the construction site and checked for completeness and whether the surface is damaged. Clean the bridge construction area to ensure that the construction surface is flat and free of debris. Perform line laying on the construction site to clearly define the position of the I-beam, and conduct technical briefing to the site operators to ensure construction safety.

[0019] S2: Transport the single-sided UHPC formwork to the designated location and accurately place it on the construction surface using hoisting equipment. Adjust the initial position of the formwork to ensure that it meets the design elevation and axis requirements. Complete the reinforcement binding and then install the other side of the UHPC formwork by aligning it. Use the top connecting screw, middle connecting screw, and bottom connecting screw through the reserved bolt holes to connect and fix the two sides of the formwork. When connecting the screws, check the fastening of each connection point one by one to ensure that the overall structure of the assembled formwork is firm and does not deform. Use a special positioner to further calibrate the position of the formwork to ensure that the connection gaps between the formworks are uniform and meet the design requirements.

[0020] S3: After the formwork assembly is completed, clean the interior to ensure that there are no debris or water accumulation. Prepare the ordinary concrete materials and mix them according to the design ratio. Pour the mixed ordinary concrete materials into the formwork through pumping equipment, layer by layer from the bottom to the top, avoiding the formation of hollow or honeycomb structures. During the pouring process, use a vibrating device to vibrate the concrete to ensure its compactness and uniformity. After the concrete pouring is completed, keep the surface of the formwork moist and cover it with curing materials to prevent water loss. Control the curing time and temperature according to the construction environmental conditions to ensure that the concrete meets the design strength requirements. During the curing period, regularly check the combination of the formwork and concrete to ensure that the overall structure does not deform or crack.

[0021] S4: After curing, the UHPC formwork and ordinary concrete are combined into one, jointly exerting mechanical properties to form a high-durability, high-bearing-capacity I-beam structure. The UHPC formwork serves as a permanent component and does not need to be removed, reducing the construction process and improving the corrosion resistance and service life of the bridge. Detect the completed I-beam to check whether its surface flatness, geometric dimensions, mechanical properties, and durability meet the design standards. After completing quality acceptance, hand over the construction area to subsequent processes.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] (1) The UHPC permanent formwork is combined with ordinary concrete to form an integral whole, significantly improving the bending resistance, shear resistance, and structural stiffness of the bridge, and prolonging the service life of the bridge through excellent corrosion resistance and impermeability, especially suitable for harsh environments such as the ocean.

[0024] (2) The formwork is designed to be removable, simplifying the construction process and reducing the number of procedures and working hours; the rapid assembly is achieved through screw connection, reducing the cost of construction equipment and labor, while significantly improving construction safety and shortening the construction period. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a separation diagram of the I-beam UHPC permanent formwork;

[0026] Fig. 2 A formwork completion schematic diagram for the I-beam UHPC permanent formwork;

[0027] Fig. 3 A schematic diagram for forming an integral body of the concrete and the I-beam UHPC permanent formwork;

[0028] The figure marks: 11, a reserved bolt connecting hole, 12, a shear screw hole, 13, a shear collaborative tooth key; 21, a top connecting screw, 22, a middle connecting screw, 23, a bottom connecting screw, 24, a shear screw; 31, a UHPC material, 32, a common concrete material, 33, a hole sealing mortar. DETAILED DESCRIPTION

[0029] The utility model will be described in detail below in combination with the drawings and specific embodiments. In the technical scheme, if the component model, material name, connection structure, control method, algorithm and other features are not explicitly stated, they are regarded as common technical features disclosed in the prior art.

[0030] Embodiment 1

[0031] The embodiment provides an I-beam UHPC permanent formwork, as shown in the figure, which comprises: a left formwork and a right formwork. Figs. 1-3

[0032] The left formwork and the right formwork are both provided with a reserved bolt connecting hole 11, a shear screw hole 12 and a shear collaborative tooth key 13; the shear screw hole 12 is provided with a shear screw 24; the shear collaborative tooth key 13 can increase the contact area and friction between the UHPC formwork and the common concrete material 32. When the I-beam is subjected to external force, the shear collaborative tooth key can effectively prevent the relative sliding between the UHPC formwork and the concrete, so that they can better bear the load together and improve the overall performance of the structure.

[0033] The left formwork and the right formwork are connected through a connecting screw assembly, the connecting screw assembly is arranged in the reserved bolt connecting hole 11, the left formwork and the right formwork are both filled with a UHPC material 31, and the left formwork and the right formwork are filled with a common concrete material 32.

[0034] In the specific embodiment, the connecting screw assembly comprises a top connecting screw 21, a middle connecting screw 22 and a bottom connecting screw 23.

[0035] In the specific embodiment, the shear screw hole 12 is arranged on the formwork according to a set interval and arrangement mode.

[0036] ​In the specific embodiment, the shear screw hole 12 is used to install the shear screw 24, which is used to enhance the cooperation between the UHPC formwork and the internal ordinary concrete, and improve the shear performance of the structure. When the I-beam is subjected to shear force, the shear screw can effectively transfer the shear force and prevent relative slip between the UHPC formwork and the concrete, thereby ensuring the stability of the entire I-beam structure.

[0037] In the specific embodiment, the shear screw 24 is cylindrical and has an anchoring structure at the end, such as a hook or a threaded segment, to enhance its anchoring effect in the concrete.

[0038] In the specific embodiment, the tooth key shape of the shear cooperation tooth key 13 is trapezoidal.

[0039] In the specific embodiment, the shear cooperation tooth keys 13 are uniformly distributed on the surface of the formwork and play their cooperative role.

[0040] In the specific embodiment, the reserved bolt connection hole 11 and the shear screw hole 12 are provided with hole sealing mortar 33, which is used to seal the reserved bolt connection hole 11 and the shear screw hole 12 to prevent water, air and harmful substances from entering the hole and causing corrosion to the connecting screw and the shear screw, thereby ensuring the durability and reliability of the connecting structure. The hole sealing mortar 33 has good bonding and impermeability, and can be tightly combined with the UHPC formwork and the screw.

[0041] In the specific embodiment, the mixed ordinary concrete material 32 is uniformly injected into the formwork from the bottom to the top by pumping equipment, avoiding the formation of voids or honeycomb structures.

[0042] In the specific embodiment, during the pouring of the ordinary concrete material 32, the concrete is vibrated using a vibrating device to ensure its compactness and uniformity.

[0043] The construction method of the I-beam UHPC permanent formwork is as follows:

[0044] S1: According to the design requirements, high-precision molds are used to manufacture the I-beam UHPC permanent formwork, ensuring high strength and high durability. During production, shear screw holes 12 and reserved bolt connection holes 11 are reserved for subsequent assembly. After the formwork is processed, it is transported to the construction site and checked for completeness and whether the surface is damaged. Clean the bridge construction area to ensure that the construction surface is flat and free of debris. Perform line laying on the construction site to clearly indicate the position of the I-beam, and conduct technical briefing to the site operators to ensure construction safety.

[0045] S2: Transport the single-sided UHPC formwork to the designated location and accurately place it on the construction surface using hoisting equipment. Adjust the initial position of the formwork to ensure it meets the design elevation and axis requirements. Complete the reinforcement binding and then install the other side of the UHPC formwork. Connect and fix the two sides of the formwork using the top connecting screw 21, middle connecting screw 22, and bottom connecting screw 23 through the reserved bolt holes 11. Check the fastening of each connection point one by one to ensure that the overall structure of the assembled formwork is firm and does not deform. Use a special positioner to further calibrate the position of the formwork to ensure that the connection gap between the formworks is uniform and meets the design requirements.

[0046] S3: After the formwork assembly is completed, clean the interior to ensure there are no debris or water accumulation. Prepare the ordinary concrete material 32 and mix it according to the design ratio. Pour the mixed ordinary concrete material 32 into the formwork evenly through pumping equipment, layer by layer from the bottom to the top to avoid creating voids or honeycomb structures. During the pouring process, use a vibrating device to vibrate the concrete to ensure its compactness and uniformity. After the concrete is poured, keep the surface of the formwork moist and cover it with curing material to prevent water loss. Control the curing time and temperature according to the construction environmental conditions to ensure that the concrete meets the design strength requirements. During the curing period, regularly check the combination of the formwork and the concrete to ensure that the overall structure does not deform or crack.

[0047] S4: After curing, the UHPC formwork and the ordinary concrete are combined into one, working together to form a high-durability, high-bearing-capacity I-beam structure. The UHPC formwork, as a permanent component, does not need to be removed, reducing the construction process and improving the corrosion resistance and service life of the bridge. Inspect the completed I-beam to check whether its surface flatness, geometric dimensions, mechanical properties, and durability meet the design standards. After completing the quality acceptance, hand over the construction area to the subsequent process.

[0048] Components not described in detail in this embodiment are existing components that can be purchased in public channels.

[0049] The above description of the embodiments is to facilitate the understanding and use of the utility model by ordinary skilled persons in the technical field. Those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to undergo creative labor. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art within the scope of the utility model without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A I-beam UHPC permanent form, characterized by, Comprise: Left and right side templates; Both the left and right side templates are provided with a reserved bolt connecting hole (11), a shear screw hole (12), and a shear cooperative tooth key (13); the shear screw hole (12) is provided with a shear screw (24); the shear cooperative tooth key (13) can increase the contact area and friction between the UHPC template and the ordinary concrete material (32); The left and right side templates are connected by a connecting screw assembly, which is arranged in the reserved bolt connecting hole (11); both the left and right side templates are filled with UHPC material (31); the left and right side templates are filled with ordinary concrete material (32) between them.

2. The I-beam UHPC permanent formwork according to claim 1, characterized in that, The connecting screw assembly comprises a top connecting screw (21), a middle connecting screw (22), and a bottom connecting screw (23).

3. The I-beam UHPC permanent formwork according to claim 1, wherein, The shear screw hole (12) is arranged on the template according to the set spacing and arrangement.

4. The I-beam UHPC permanent formwork according to claim 1, wherein, The shear screw hole (12) is used to install the shear screw (24), which is used to enhance the cooperative working capacity between the UHPC template and the internal ordinary concrete, and improve the shear performance of the structure.

5. The I-beam UHPC permanent formwork according to claim 1, wherein, The shear screw (24) is cylindrical, and the end is provided with an anchoring structure.

6. The I-beam UHPC permanent formwork according to claim 1, wherein, The tooth key shape of the shear cooperative tooth key (13) is trapezoidal.

7. The I-beam UHPC permanent formwork according to claim 1, wherein, Multiple shear cooperative tooth keys (13) are uniformly distributed on the surface of the template, and play their cooperative role.

8. The I-beam UHPC permanent formwork according to claim 1, wherein, The reserved bolt connecting hole (11) and the shear screw hole (12) are provided with a hole sealing mortar (33), which is used to close the reserved bolt connecting hole (11) and the shear screw hole (12), prevent water, air and harmful substances from entering the hole, cause corrosion to the connecting screw and the shear screw, and thus ensure the durability and reliability of the connecting structure.

9. The I-beam UHPC permanent formwork according to claim 1, wherein, The mixed ordinary concrete material (32) is uniformly injected into the template from the bottom to the top by a pumping device, avoiding the formation of hollow or honeycomb structure.

10. The I-beam UHPC permanent formwork according to claim 1, wherein, During the pouring of the ordinary concrete material (32), a vibrating device is used to vibrate the concrete to ensure its compactness and uniformity.

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