CN-121989345-A - Prefabricated box girder flange plate template with small curve radius and assembling method thereof

CN121989345ACN 121989345 ACN121989345 ACN 121989345ACN-121989345-A

Abstract

The invention discloses a small-curve-radius prefabricated box girder flange plate template which comprises a flange plate base module and a plurality of functional modules of different types, wherein when the template is used, the flange plate base module is assembled with any functional module, a positioning assembly used for assembling and positioning and a sealing assembly used for automatically triggering sealing materials to be mixed and expanded between the flange plate base module and the functional modules under the action of external force are arranged between the flange plate base module and the functional modules, and compared with the prior art, the template can be used for quickly combining flange plate widths and cantilever lengthening amounts required by adapting to different curve radiuses according to actual requirements by arranging the flange plate base module and the functional modules of different specifications. The positioning assembly among the modules ensures millimeter-level alignment precision during assembly, fundamentally avoids deformation caused by on-site cutting and welding, ensures that the forming dimensional precision of the flange plate is stably controlled within +/-2 mm allowed by the specification, and greatly improves the linear quality of the beam body.

Inventors

Ye Anbo
ZOU YUAN
WANG CHAOYANG
GONG JIEMEI
Zou Shunbing
LI QIANGHUA
GAO SHUYUN
CAO CHANGJIE
ZHANG ENLAI
MING GUANGFENG

Assignees

中国建筑第八工程局有限公司

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (10)

1. The small-curve-radius prefabricated box girder flange plate template is characterized by comprising a flange plate base module and a plurality of functional modules of different types, wherein when the template is used, the flange plate base module is assembled with any one of the functional modules, and a positioning assembly for assembling and positioning and a sealing assembly for automatically triggering sealing materials to be mixed and expanded between the flange plate base module and the functional modules under the action of external force are arranged between the flange plate base module and the functional modules.
2. The small curve radius prefabricated box girder flange plate template of claim 1, wherein the positioning assembly comprises a pre-positioning assembly and a secondary positioning assembly arranged on a flange plate base module and a functional module, and the secondary positioning assembly comprises: The wedge-shaped positioning block is connected to the flange plate base module or the functional module; the wedge-shaped positioning groove is formed in the functional module or the flange plate base module and used for embedding and positioning the wedge-shaped positioning blocks.
3. The small curve radius prefabricated box girder flange plate template of claim 2, wherein an anti-drop assembly is provided between the wedge-shaped positioning block and the wedge-shaped positioning groove, the anti-drop assembly comprising: The two anti-falling grooves are formed in the outer wall of the wedge-shaped positioning block in opposite directions; The two anti-falling holes are formed in the side walls of the wedge-shaped positioning grooves in opposite directions and are used for being communicated with the two anti-falling grooves in a one-to-one corresponding alignment manner after assembly; the anti-drop blocks are arranged on the outer wall of the wedge-shaped positioning groove in a rotating mode, and the two anti-drop blocks are made to correspond to each other one by one from the two anti-drop holes to the corresponding anti-drop grooves to be propped against each other through the adjusting parts.
4. A small curve radius precast box girder flange panel formwork as claimed in claim 3, wherein the adjusting part comprises: The guide post is fixedly connected with the wedge-shaped positioning groove; The movable adjusting bar is connected with the guide post in a sliding manner, and an adjusting screw rod connected with the movable adjusting bar in a threaded manner is rotationally connected to the guide post; traction bars, traction bars have two and two traction bar one end and remove regulation strip both ends one-to-one and rotate and link to each other, two traction bar other ends and two anticreep piece one end one-to-one rotate and link to each other.
5. The small curve radius precast box girder flange plank template of claim 2, wherein the predetermined bit assembly comprises: the positioning column is fixedly connected with the flange plate foundation module or the functional module at one end, and the length of the positioning column along the assembly direction is greater than that of the wedge-shaped positioning block along the assembly direction; the locating holes are formed in the functional module or the flange plate base module and used for embedding and locating the locating columns.
6. The small-curve radius prefabricated box girder flange plate template of claim 1, wherein a first mounting groove is formed on a splicing surface of the flange plate base module along the length direction of a spliced line formed after splicing, a second mounting groove is formed on a splicing surface of the functional module along the length direction of the spliced line formed after splicing, and the sealing assembly comprises: The sealing material bearing box is embedded in the first mounting groove, one side of the sealing material bearing box, which faces the notch of the first mounting groove, is open, an independent first accommodating cavity and a second accommodating cavity are formed in the sealing material bearing box through a separation film, water is filled in the first accommodating cavity, an expansion polyurethane sealant is filled in the second accommodating cavity, and a sealing film is arranged on the opening; The puncture knife body is arranged in the second mounting groove and used for puncturing the sealing film and the separation film.
7. The small curve radius prefabricated box girder flange plate template of claim 6, wherein the separation membranes are distributed along the length direction of the splicing line and the first accommodating cavity is located above the second accommodating cavity.
8. The small curve radius prefabricated box girder flange panel template of claim 6 or 7, wherein the piercing blade body comprises: The annular outer frame blade is arranged in the second mounting groove; the strip-shaped blades are arranged in the annular outer frame blades at intervals along the length direction of the splicing line, and each strip-shaped blade is distributed along the vertical line direction of the length direction of the splicing line.
9. The small curve radius prefabricated box girder flange plate template of claim 1, wherein a plurality of quick lock bolts are further connected between the flange plate base module and the functional module.
10. A method for assembling a small-curve-radius prefabricated box girder flange plate template, based on the small-curve-radius prefabricated box girder flange plate template as claimed in any one of claims 1 to 9, comprising the following steps: S1, installing and fixing, namely hoisting and fixing a flange plate foundation module on a supporting beam; S2, assembling and butting, namely hoisting the functional module to the supporting beam, enabling the splicing surface of the functional module, which is spliced to face the flange plate base module, to be close to each other and assembling the functional module; S3, triggering and sealing, namely, in the assembling process, a puncture knife body on the functional module punctures a sealing film and a separating film of a sealing material bearing box arranged on the flange plate base module, so that the expanded polyurethane sealant packaged in the sealing material bearing box is mixed with water and subjected to chemical reaction expansion, and the expanded sealant is filled in a first mounting groove formed on the flange plate base module splicing surface and a second mounting groove formed on the functional module splicing surface; and S4, locking connection, namely locking between the flange plate base module and the functional module.

Description

Prefabricated box girder flange plate template with small curve radius and assembling method thereof Technical Field The invention relates to the technical field of prefabricated box girder dies, in particular to a small-curve-radius prefabricated box girder flange plate template and an assembling method thereof. Background In the construction of the prefabricated box girder, the flange plate is used as a key component of the girder body, and the dimensional accuracy, particularly the width and the cantilever length, of the flange plate directly influence the transverse stability of the girder body and the smooth connection between the girder body and a designed line after the girder bodies are assembled. For a line with a small curve radius (for example, the radius R is in the range of 600m to 2500 m), in order to ensure the line shape, the width of the flange plate and the length of the cantilever need to be precisely adjusted according to the specific curve radius, and the variation (such as the extension of the cantilever by 0-300 mm) needs to be precisely realized. At present, most of flange plate templates commonly adopted in the industry are integral structures integrally welded with side dies of box girders. The traditional scheme has the following obvious defects when being practically applied, particularly when dealing with changeable working conditions with small curve radius: 1. The adaptability is poor, the precision is difficult to ensure, and the integral template cannot be flexibly adjusted according to the size change requirements of the flange plates corresponding to different curve radiuses. Generally, only the side mold and the flange plate mold plate can be replaced integrally, or rough transformation such as gas cutting, welding and the like can be carried out on site. The on-site adjustment is extremely easy to cause the thermal deformation and the stress deformation of the template, so that the dimensional accuracy of the formed flange plate generates larger deviation exceeding +/-5 mm, and the strict requirements on the size in specifications such as 'high-speed railway prefabrication post-tensioning method prestressed concrete simply supported beams' are difficult to meet, and the integral linear quality of the bridge is influenced. 2. The replacement efficiency is low, the production rhythm is restricted, the integral template has large weight, the structure is integrated, and the disassembly and assembly procedures are complicated. The large-scale gantry crane equipment is used for each replacement or adjustment, and 8-10 workers are matched for cooperative operation, and the single operation takes up to 4-6 hours. The process severely occupies the effective operation time of the beam manufacturing pedestal, and greatly restricts the pedestal turnover efficiency and the overall productivity of the precast beam field. 3. The template has serious loss and low economic benefit, and frequent on-site cutting and welding operations can permanently destroy the original structure of the template, weaken the integral strength and rigidity of the template and accelerate the corrosion and aging of the template. The effective turnover use times of the templates are greatly reduced (usually less than 15 times), so that the depreciation cost of single use is increased, the construction party is forced to frequently invest funds to manufacture new templates, and the equipment investment and the construction cost are remarkably improved. 4. The integral template has the advantages of large volume, centralized weight, poor stability in the processes of hoisting, transferring and installing, and the risks of shaking, colliding and even overturning, thereby bringing about great potential safety hazards to field operators and equipment. Therefore, developing a prefabricated box girder flange plate template which can rapidly and accurately adapt to small curve radius size change, is high in disassembly and assembly efficiency, durable and economical, and has become a technical problem to be solved in the field. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a prefabricated box girder flange plate template with a small curve radius and an assembling method thereof, so as to solve the problems of how to develop the prefabricated box girder flange plate template which can be rapidly and accurately adapted to the small curve radius size change, and is high in disassembly and assembly efficiency, durable and economical. In order to achieve the purpose, the first aspect of the invention adopts the following technical scheme that the flange plate template of the small-curve-radius prefabricated box girder comprises a flange plate base module and a plurality of functional modules in different types, wherein when the flange plate base module is assembled with any one of the functional modules, and a positioning assembly for assembling and positioning and