CN204417983U - A kind of prefabricated units on-site consolidation compound beam for rushing to repair concrete box girder - Google Patents

Abstract

A prefabricated component field assembled composite beam used for emergency repair of concrete box girders. By assembling prefabricated concrete top slabs, concrete bottom slabs, corrugated steel webs and plugs at both ends, concrete box girders for railways, highways and urban traffic, etc. are realized. Emergency repairs and rapid restoration of operations. This emergency repair method can effectively reduce the reliance on large-scale transportation and lifting equipment in the emergency repair process, speed up bridge repairs, reduce the area and scale of emergency beam storage sites, reduce repair costs, and achieve the goal of quickly restoring traffic line operations.

Description

A prefabricated component field assembled composite beam for emergency repair of concrete box girder

technical field

The utility model belongs to the technical field of temporary emergency repair bridges in civil engineering, and relates to a prefabricated component field assembled composite beam used for emergency repair of concrete box girders, which is applied to emergency emergency repair and rapid recovery of concrete box girders in railways, highways and urban traffic.

Background technique

At present, concrete box girders are widely used in bridge engineering due to their advantages such as large longitudinal and transverse stiffness, good integrity, and good dynamic performance. However, when the concrete box girder is damaged by natural disasters, wars, impacts, etc., it is more difficult to repair it due to the large volume and weight of the concrete box girder. The current emergency repair of concrete box girder mainly adopts methods such as 64-type railway military steel girder, disassembled steel truss girder, and segmental prefabricated assembly. The utility model patent "CD-type prefabricated highway steel bridge" (application number: CN201320317588) provides an emergency repair beam structure for a CD-type prefabricated highway steel bridge. Fast, reliable connection and wide application, but its low rigidity will lead to large deformation of the beam body after emergency repair, large vibration, high noise, and low vehicle speed, so it is not suitable for emergency repair of concrete box girders on high-speed railways or heavy-duty railways; The invention patent "A Method for Emergency Repair of Concrete Box Girder" (application number: CN201410324659) introduces a method for emergency repair of concrete box girders suitable for high-speed railways and heavy-duty railways. Small size, low vibration and low noise requirements, the prefabricated assembly of the concrete roof and bottom plate also reduces the hoisting weight of the whole beam to a certain extent, but the overall weight and volume of the concrete roof and bottom plate are still large; utility model The patents "a corrugated steel web prestressed concrete composite box girder segment" (patent number: ZL 200820036647.X) and "assembled and cemented box girder for railway prefabricated segments" (application number: CN201020259427) respectively mention a prefabricated Corrugated steel web box girder assembled by segment and concrete box girder assembled by prefabricated segment. In the above two utility model patents, the concrete box girder segment with corrugated steel web and the concrete box girder segment are prefabricated in the factory and then transported Assembled at the bridge site, due to the weight and volume of the corrugated steel web concrete box girder section and the concrete box girder section are still very large, the storage and transportation of the corrugated steel web composite box girder section and the concrete box girder section It brings a lot of inconvenience, which makes it necessary to rely on large-scale transportation equipment and hoisting equipment during emergency repair construction, which restricts the application of the above-mentioned technology in actual engineering to a certain extent; Composite box girder and method” (application number: CN 102704386A) introduced a corrugated steel web composite girder prefabricated and assembled by sub-components. This method greatly reduces the structure’s self-weight and hoisting weight, but its concrete bottom and roof are poured on site. The method increases the on-site pouring and maintenance period of concrete, slows down the speed of bridge repairs, and the roof and floor assemblies of adjacent sections are only connected by cementation, and no shear connectors are set. Shearing ability is weak.

From present existing patent, open document and practical engineering application, also do not have a kind of prefabricated component field assembled composite beam that is used for repairing concrete box girder. This kind of composite beam can save storage space, effectively reduce the dependence on large-scale transportation and lifting equipment in the repair process, speed up the repair speed of damaged bridges, and achieve the goal of quickly restoring line operation.

Utility model content

The technical problem to be solved by the utility model is: to provide a prefabricated component field assembled composite beam for emergency repair of concrete box girders, so as to solve the problems of emergency repair and quick restoration of line operation of concrete box girders of railways, highways and urban traffic.

The technical scheme that the utility model solves its technical problem adopts is:

A prefabricated component field-assembled composite beam for emergency repair of concrete box girders, including concrete roof 1, concrete floor 2, corrugated steel web 3, pier 4, bracket 5, plug 6, top plate tenon 7-1, bottom plate tenon 7 -2. Top plate tenon hole 8-1, bottom plate tenon hole 8-2, prestressed ribs inside the top plate 9-1, prestressed ribs inside the bottom plate 9-2, top plate prestressed channel 10-1, bottom plate prestressed channel 10-2 , External prestressed tendons 11, steering block 12, connecting bolts between top plate and corrugated steel web 13-1, connecting bolts between bottom plate and corrugated steel web 13-2, connecting bolts between corrugated steel web and corrugated steel web 13-3 It is characterized in that the concrete top plate 1 is connected by the top plate tenon 7-1 and the top plate tenon hole 8-1 provided at both ends; the concrete bottom plate 2 is connected by the bottom plate tenon 7-2 and the bottom plate tenon hole 8-2 provided at both ends The corrugated steel web 3 and the concrete roof 1 are connected by the top plate embedded in the concrete roof 1 and the corrugated steel web connecting bolt 13-1; the corrugated steel web 3 and the concrete bottom plate 2 are connected by pre-embedded The bottom plate in 2 is connected with the corrugated steel web connecting bolt 13-2; the corrugated steel web 3 sections are connected with the corrugated steel web and the corrugated steel web connecting bolt 13-3; after the assembly of the above components is completed, It is necessary to penetrate the external prestressed tendons 11 in the steering block 12 and stretch the external prestressed tendons 11 .

The above-mentioned prefabricated component field assembled composite beam for emergency repair of concrete box girder is characterized in that, when assembling on site, epoxy resin glue is first applied to the sides of the two ends of the concrete bottom plate 2, the bottom plate tenon 7-2, and the bottom plate tenon hole 8 -2, insert the tenon 7-2 of the bottom plate into the tenon hole 8-2 of the bottom plate, and after the epoxy resin glue between the two concrete bottom plates of each segment reaches the design strength, penetrate the prestressed hole 10-2 of the bottom plate into the prestressing hole 8-2 of the bottom plate Stress tendons (9-2) and tension the prestressed tendons 9-2 in the base plate.

The above-mentioned prefabricated component field assembled composite beam for emergency repair of concrete box girders is characterized in that after the concrete floor 2 is spliced, the corrugated steel web 3 and the concrete floor 2 are connected by the bottom plate and the corrugated steel web with bolts 13- 2 connection, each corrugated steel web 3 segments are also connected by corrugated steel web and corrugated steel web connecting bolt 13-3.

The above-mentioned prefabricated component on-site assembled composite beam for emergency repair of concrete box girder is characterized in that, during on-site assembly, epoxy resin glue is first applied to the sides of the two ends of the concrete roof 1, the roof tenon 7-1, and the roof tenon hole 8 -1, insert the tenon head 7-1 of the top plate into the tenon hole 8-1 of the top plate. Stress tendons 9-1 and tension the prestressed tendons 9-1 in the roof; the concrete roof 1 and the corrugated steel web 3 are connected by connecting bolts 13-1 between the roof and the corrugated steel web.

The above-mentioned prefabricated component field assembled composite beam for emergency repair of concrete box girder is characterized in that, after the assembly of the concrete roof 1, the concrete floor 2, and the corrugated steel web 3 is completed, it is necessary to penetrate the external prestressing force in the steering block 12 Tendons 11, and stretch the external prestressed tendons 11, hoist the plugs 6 at both ends, and anchor the external prestressed tendons 11 on the plugs 6.

The beneficial effects of the utility model are:

A prefabricated component field assembled composite beam used for emergency repair of concrete box girders. By assembling prefabricated concrete top slabs, concrete bottom slabs, corrugated steel webs and plugs at both ends, concrete box girders for railways, highways and urban traffic, etc. are realized. Emergency repairs and rapid restoration of operations. This emergency repair method can effectively reduce the reliance on large-scale transportation and lifting equipment in the emergency repair process, speed up bridge repairs, reduce the area and scale of emergency beam storage sites, reduce repair costs, and achieve the goal of quickly restoring traffic line operations.

Description of drawings

Fig. 1 Schematic diagram of sub-components of concrete box girder for emergency repair.

Figure 2 Schematic diagram of the cross-section of the emergency repair concrete box girder.

Fig. 3 Schematic diagram of emergency repair concrete box girder roof segment.

Fig. 4 Schematic diagram of emergency repair concrete box girder mid-span mid-floor segment.

Fig. 5 Schematic diagram of the floor section near the concrete box girder support for emergency repair.

Fig. 6 Schematic diagram of corrugated steel web section of concrete box girder for emergency repair.

Fig. 7 Overall layout of concrete box girder for emergency repair.

Fig. 8 Schematic diagram of external prestressed layout of concrete box girder for emergency repair.

Figure 9 is a schematic diagram of the elevation of supports erected between on-site bridge piers during on-site emergency repair of concrete box girders.

Fig. 10 Schematic diagram of the cross-section of brackets Ⅰ-Ⅰ erected between on-site bridge piers during on-site emergency repair of concrete box girders.

Fig. 11 Schematic diagram of the elevation of the concrete bottom plate member hoisted to the erected support during the on-site emergency repair of the concrete box girder.

Fig. 12 Schematic diagram of section Ⅱ-Ⅱ of hoisting the concrete bottom plate member to the erected bracket during the on-site emergency repair of the concrete box girder.

Fig. 13 Elevation schematic diagram of hoisting corrugated steel web and assembling connection with concrete floor members during on-site emergency repair of concrete box girder.

Fig. 14 Schematic diagram of cross section III-III of hoisting corrugated steel web and assembling connection with concrete floor members during on-site emergency repair of concrete box girder.

Figure 15. Elevation schematic diagram of the assembled connection between the hoisting concrete roof member and the corrugated steel web during the on-site emergency repair of the concrete box girder.

Figure 16 Schematic diagram of the Ⅳ-Ⅳ section of the assembled connection between the hoisting concrete roof member and the corrugated steel web during the on-site emergency repair of the concrete box girder.

Figure 17 Schematic diagram of the elevation of the overall layout of the concrete box girder after the hoisting is completed during the on-site emergency repair of the concrete box girder.

Figure 18 Schematic diagram of the V-V section of the overall layout of the concrete box girder after the hoisting is completed during the on-site emergency repair of the concrete box girder.

In the figure: 1—concrete top slab; 2—concrete bottom slab; 3—corrugated steel web; 4—bridge pier; 5—bracket; 6—plug; —top mortise hole; 8-2—bottom mortise hole; 9-1—prestressed tendon in top plate; 9-2—prestressed tendon in bottom plate; 10-1—top prestressed channel; 10-2—bottom plate prestressed channel ; 11—external prestressed tendons; 12—steering block; 13-1—connecting bolts between top plate and corrugated steel web; 13-2—connecting bolts between bottom plate and corrugated steel web; 13-3—corrugated steel web and corrugated steel Web connection bolts.

Detailed ways

The utility model is further described in conjunction with the accompanying drawings:

A prefabricated on-site assembled composite beam for repairing concrete box girders is characterized in that it comprises the following steps:

Step 1: Prefabricate concrete roof 1, concrete bottom 2, corrugated steel web 3, plug 6 and other components according to a certain size and specification and store them in the beam storage yard.

Step 2: Remove the damaged concrete box girder, and erect support 5 between two bridge piers on site.

Step 3: Go to the beam storage yard and transport the prefabricated concrete roof 1, concrete floor 2, corrugated steel web 3, plug 6 and other components of corresponding sizes and specifications to the emergency repair site.

Step 4: Hoist the concrete base plate 2 to the erected support 5, and connect the concrete base plate 2 sections through the base plate tenon 7-2 and the base plate tenon hole 8-2 arranged on the sides of the concrete base plate 2 at both ends; the concrete base plate Before the two sections are connected, first apply epoxy resin or cement mortar on the tenon 7-2 and the sides of the two ends of the concrete floor 2; Penetrate the prestressed tendons 9-2 in the bottom plate and stretch them, so that the sections of the concrete bottom plate 2 are connected into a whole.

Step 5: Hoist the corrugated steel web section 3 and assemble it with the concrete floor 2 section. The 3 segments of the web are connected by the corrugated steel web and the corrugated steel web connecting bolt 13-3.

Step 6: Hoist the concrete roof 1 onto the spliced corrugated steel web 3 segment, and make the connection between the concrete roof 1 segment and the corrugated steel web 3 segment use the top plate and corrugated steel web connecting bolt 13-1 Connection; each concrete roof 1 segment is connected through the roof tenon 7-1 and roof tenon hole 8-1 arranged on the two ends of the concrete roof 1; before the concrete roof 1 segment is connected, the roof tenon 7-1 Epoxy resin or cement mortar is applied on both ends of the concrete roof 1; after the concrete roof 1 section is connected, the prestressed tendons 9-1 in the roof body are penetrated into the roof prestressed channel 10-1 of the concrete roof 1 section and carried out Stretching, so that the sections of the concrete roof 1 are connected into a whole.

The following steps can also be adopted: hoisting the concrete roof 1 to the spliced corrugated steel web 3 segments, and first through the roof tenons 7-1 and the roof tenons 8-1 arranged on the sides of the concrete roof 1. The concrete roof 1 section is connected; before the concrete roof 1 section is connected, epoxy resin or cement mortar is first applied to the roof tenon 7-1 and the two ends of the concrete roof 1; after the concrete roof 1 section is connected, the concrete roof The prestressed channel 10-1 of the 1-section roof penetrates into the prestressed tendon 9-1 in the roof body and is stretched, so that the sections of the concrete roof 1 are connected into a whole; finally, the spliced concrete roof 1 section The top plate and the corrugated steel web connecting bolt 13-1 are used to connect with the corrugated steel web 3 segments.

Step 7: Lift the plugs 6 to the two ends of the prefabricated concrete box girder, arrange the external prestressed tendons 11 on the spliced concrete floor 2 and the plugs 6, and stretch the external prestressed tendons 11 to make the sub-components Each component of the prefabricated and assembled concrete box girder forms a complete concrete box girder.

Step 8: Install the bridge deck system and auxiliary facilities on the assembled concrete box girder roof 1. After the construction quality acceptance is passed, the emergency repair of the damaged concrete box girder and the restoration of the line can be realized.

Application of Emergency Repair Method for Concrete Box Girder

Example 1: A double-track integrally prestressed concrete high-speed railway box girder with a span of 24 meters suffered man-made damage. For this reason, the emergency repair method of concrete box girder prefabricated and assembled by sub-components is used for emergency repair. The repair method is:

Step 1: Prefabricate concrete roof 1, concrete bottom 2, corrugated steel web 3, plug 6 and other components according to a certain size and specification and store them in the beam storage yard.

Step 2: Remove the damaged concrete box girder, and erect support 5 between two bridge piers on site.

Step 3: Go to the beam storage yard and transport the prefabricated concrete roof 1, concrete floor 2, corrugated steel web 3, plug 6 and other components of corresponding sizes and specifications to the emergency repair site.

Step 4: Hoist the concrete bottom slab 2 onto the erected support 5, and connect the concrete bottom slab 2 segments through the bottom slab tenon 7-2 and the bottom slab tenon hole 8-2 arranged on the two ends of the concrete bottom slab 2; Before connecting the 2 sections of the soil floor, apply epoxy resin or cement mortar on the mortise 7-2 and the sides of the two ends of the concrete floor 2; 2 penetrates the prestressed tendons 9-2 inside the bottom plate and stretches them, so that the sections of the concrete bottom plate 2 are connected into a whole.

Step 5: Hoist the corrugated steel web section 3 and assemble it with the concrete floor 2 section. The 3 segments of the web are connected by the corrugated steel web and the corrugated steel web connecting bolt 13-3.

Step 6: Hoist the concrete roof 1 onto the spliced corrugated steel web 3 segment, and make the connection between the concrete roof 1 segment and the corrugated steel web 3 segment use the top plate and corrugated steel web connecting bolt 13-1 Connection; each concrete roof 1 segment is connected through the roof tenon 7-1 and roof tenon hole 8-1 arranged on the two ends of the concrete roof 1; before the concrete roof 1 segment is connected, the roof tenon 7-1 Epoxy resin or cement mortar is applied on both ends of the concrete roof 1; after the concrete roof 1 section is connected, the prestressed tendons 9-1 in the roof body are penetrated into the roof prestressed channel 10-1 of the concrete roof 1 section and carried out Stretching, so that the sections of the concrete roof 1 are connected into a whole.

Step 7: Lift the plugs 6 to the two ends of the prefabricated concrete box girder, arrange the external prestressed tendons 11 on the spliced concrete floor 2 and the plugs 6, and stretch the external prestressed tendons 11 to make the sub-components Each component of the prefabricated and assembled concrete box girder forms a complete concrete box girder.

Step 8: Install the bridge deck system and auxiliary facilities on the assembled concrete box girder roof 1. After the construction quality acceptance is passed, the emergency repair of the damaged concrete box girder and the restoration of the line can be realized.

Example 2: A double-track integrally prestressed concrete heavy-duty railway box girder with a span of 32 meters suffered serious damage to the upper structure during the earthquake. For this reason, the emergency repair method of concrete box girder prefabricated and assembled by sub-components is used for emergency repair. The repair method is:

Step 1: Prefabricate concrete roof 1, concrete bottom 2, corrugated steel web 3, plug 6 and other components according to a certain size and specification and store them in the beam storage yard.

Step 2: Remove the damaged concrete box girder, and erect support 5 between two bridge piers on site.

Step 3: Go to the beam storage yard and transport the prefabricated concrete roof 1, concrete floor 2, corrugated steel web 3, plug 6 and other components of corresponding sizes and specifications to the emergency repair site.

Step 4: Hoist the concrete base plate 2 onto the erected support 5, and connect the concrete base plate 2 sections through the base plate tenon 7-2 and the base plate tenon hole 8-2 arranged on the sides of the concrete base plate 2 at both ends; the concrete base plate Before the two sections are connected, first apply epoxy resin or cement mortar on the tenon 7-2 and the sides of the two ends of the concrete floor 2; Penetrate the prestressed tendons 9-2 in the bottom plate and stretch them, so that the sections of the concrete bottom plate 2 are connected into a whole.

Step 5: Hoist the corrugated steel web section 3 and assemble it with the concrete floor 2 section. The 3 segments of the web are connected by the corrugated steel web and the corrugated steel web connecting bolt 13-3.

Step 6: Hoist the concrete roof 1 to the spliced corrugated steel web 3 section, and first connect each concrete roof 1 section through the roof tenon 7-1 and the roof tenon hole 8-1 arranged on the two ends of the concrete roof 1 before the concrete roof 1 section is connected, apply epoxy resin or cement mortar on the roof tenon 7-1 and the two ends of the concrete roof 1; after the concrete roof 1 section is connected, the concrete roof 1 section roof The prestressed channel 10-1 penetrates the prestressed tendon 9-1 in the roof and stretches it, so that the sections of the concrete roof 1 are connected into a whole; finally, the spliced concrete roof 1 section and the corrugated steel web The top plate and corrugated steel web connecting bolts 13-1 are used to connect the plate 3 sections.

Step 7: Lift the plug 6 to the two ends of the prefabricated concrete box girder, arrange the external prestressed tendons 11 on the spliced concrete floor 2 and the plug 6, and stretch the external prestressed tendons 11 to make the sub-components Each component of the prefabricated and assembled concrete box girder forms a complete concrete box girder.

Step 8: Install the bridge deck system and auxiliary facilities on the assembled concrete box girder roof 1. After the construction quality acceptance is passed, the emergency repair of the damaged concrete box girder and the restoration of the line can be realized.

The specific implementation method described above illustrates the purpose, technical solutions and beneficial effects of the utility model patent. It should be emphasized that the above descriptions are only specific embodiments of the utility model patent, and cannot be used to limit the scope of the utility model. Any modification, equivalent replacement or improvement made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

In summary, the utility model provides a prefabricated component field assembled composite beam for emergency repair of concrete box girders. The composite beam can effectively reduce the dependence on large-scale transportation and lifting equipment in the emergency repair process, and speed up the bridge repair speed , reduce the area and scale of the emergency beam storage yard, reduce the repair cost, and achieve the goal of quickly restoring the operation of the traffic line. The utility model has novelty and practicability, and meets the requirements of the utility model patent, so the utility model patent application is filed according to law.

Claims (5)

1. A prefabricated component field-assembled composite beam for emergency repair of concrete box girders, including a concrete roof (1), a concrete floor (2), corrugated steel webs (3), piers (4), brackets (5), plugging Head (6), top plate tenon (7-1), bottom plate tenon (7-2), top plate tenon hole (8-1), bottom plate tenon hole (8-2), prestressed tendons in the top plate (9-1), Internal prestressed tendons (9-2) of the bottom plate, prestressed tunnels of the top plate (10-1), prestressed tunnels of the bottom plate (10-2), external prestressed tendons (11), steering blocks (12), top plate and corrugated steel web Plate connection bolts (13-1), bottom plate and corrugated steel web connection bolts (13-2), corrugated steel web and corrugated steel web connection bolts (13-3); it is characterized in that the concrete roof (1) passes The top plate tenon (7-1) provided at both ends is connected with the top plate tenon hole (8-1); the concrete bottom plate (2) is connected through the bottom plate tenon (7-2) provided at both ends and the bottom plate tenon hole (8-2 ) for connection; the corrugated steel web (3) is connected with the concrete roof (1) through the roof embedded in the concrete roof (1) and the corrugated steel web connecting bolt (13-1); the corrugated steel web (3 ) and the concrete bottom plate (2) are connected through the bottom plate embedded in the concrete bottom plate (2) and the corrugated steel web connecting bolts (13-2); the corrugated steel web (3) uses corrugated steel web and The corrugated steel web connecting bolts (13-3) are connected; after the above-mentioned components are assembled, the external prestressed tendons (11) need to be penetrated in the steering block (12), and the external prestressed tendons (11) are stretched. 2. A kind of prefabricated component field assembled composite beam for repairing concrete box girder as claimed in claim 1, it is characterized in that, when assembling on site, epoxy resin glue is first applied to the concrete base plate (2) both ends sides and the base plate On the tenon (7-2) and the tenon hole (8-2) of the bottom plate, insert the tenon (7-2) of the bottom plate into the tenon hole (8-2) of the bottom plate, and wait for epoxy resin glue between the concrete bottom plate (2) of each segment After the design strength is reached, the prestressed tendons (9-2) inside the bottom plate are penetrated into the prestressed tunnel (10-2) of the bottom plate and the prestressed tendons (9-2) inside the bottom plate are stretched. 3. a kind of prefabricated component field assembled composite beam for repairing concrete box girder as claimed in claim 1, is characterized in that, after the concrete floor (2) is spliced, corrugated steel web (3) and concrete floor ( 2) The bottom plate is connected with the corrugated steel web connecting bolts (13-2), and the corrugated steel web (3) segments are also connected with the corrugated steel web and corrugated steel web connecting bolts (13-3). 4. A kind of prefabricated component field assembled composite beam for rush repairing concrete box girder as claimed in claim 1, it is characterized in that, when assembling on site, epoxy resin glue is first applied to the two ends of the concrete roof (1) and the roof On the tenon (7-1) and top plate tenon hole (8-1), insert the top plate tenon (7-1) into the top plate tenon hole (8-1), and wait for epoxy resin glue between the concrete top plate (1) of each segment After reaching the design strength, penetrate the prestressed tendons (9-1) in the roof body in the roof prestressed tunnel (10-1) and stretch the prestressed tendons (9-1) in the roof body; the concrete roof (1) and the corrugated steel The webs (3) are connected by connecting bolts (13-1) between the top plate and the corrugated steel webs. 5. A kind of prefabricated component field assembled composite beam for rush repairing concrete box girder as claimed in claim 1, is characterized in that, concrete roof (1), concrete floor (2), corrugated steel web (3) are assembled Finally, it is necessary to penetrate the external prestressed tendons (11) into the steering block (12), stretch the external prestressed tendons (11), hoist the plugs (6) at both ends, and anchor the external prestressed tendons (11) on the plug (6).