CN111236075A

CN111236075A - External prestressed reinforcement bundle mounting structure of concrete box bridge

Info

Publication number: CN111236075A
Application number: CN202010068533.9A
Authority: CN
Inventors: 冯环; 陈燕; 梁冠军; 张勇; 朱振东
Original assignee: Chuzhou Vocational and Technical College
Current assignee: Chuzhou Vocational and Technical College
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-06-05
Anticipated expiration: 2040-01-21
Also published as: CN111236075B

Abstract

The invention discloses a mounting structure for external prestressed reinforcement bundles of a concrete box bridge, which comprises a concrete box bridge, wherein a plurality of groups of concrete supporting plates are uniformly mounted in the concrete box bridge, an arched cavity is formed between every two adjacent groups of concrete supporting plates, reinforcing plates are vertically arranged in the concrete supporting plates at two ends, through holes are formed in the plurality of groups of concrete supporting plates at the inner side, guide pipes are cast in the through holes, a plurality of groups of reinforcement bundles are inserted between the plurality of groups of guide pipes, and two ends of the reinforcement bundles are connected with the reinforcing plates. The invention designs the reinforcing steel bar bundles for reinforcing connection between the precast concrete box bridges, can improve the integrity of the bridge through the reinforcing steel bar bundles, designs the special guide pipes at the joints of the reinforcing steel bar bundles and the bridge body, can reduce the damage of the reinforcing steel bar bundles to a wall body, and installs the end fixing mechanisms for fixing the reinforcing steel bar bundles at the two ends of the reinforcing steel bar bundles, and can effectively improve the stability and the strength of the installation of the reinforcing steel bar bundles.

Description

External prestressed reinforcement bundle mounting structure of concrete box bridge

Technical Field

The invention relates to the technical field of bridges, in particular to an external prestressed reinforcement beam mounting structure of a concrete box bridge.

Background

The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-place box girder. The box girder prefabricated in the independent site can be erected after the lower project is finished by combining the bridge girder erection machine, so that the project progress can be accelerated, and the construction period can be saved; cast-in-place box girders are mostly used for large continuous bridges. The common materials are divided into two types, namely a prestressed reinforced concrete box girder and a steel box girder. The prestressed reinforced concrete box girder is constructed on site, and transverse prestress is also arranged in some cases besides longitudinal prestress; the steel box girder is generally processed in a factory and then transported to a field for installation, a full steel structure is provided, a partially reinforced concrete pavement layer is also provided, the concrete box bridge is often installed in a splicing mode for improving the efficiency of the bridge building, however, the integrity between the concrete box bridges is poor due to the installation mode, so that the integral strength of the bridge is influenced, a reinforcing structure is required to be arranged in the steel box girder, and the prestressed reinforcement beam is usually adopted to form connection between the concrete box bridges.

However, the existing external prestressed reinforcement bundles of concrete box bridges have the following problems in the installation process: (1) the existing external prestressed reinforcement bundle is simple in installation mode, the connection part between the existing external prestressed reinforcement bundle and a bridge body is easily damaged due to the lack of protective measures, the strength of the connection part is low, and the requirement cannot be met; (2) usually, a steering device is designed in the process of routing external prestressed tendons, and the existing steering device is simple in structure, mainly including a block type steering device, a rib type steering device and a diaphragm type steering device, and the tightness and the inclination angle of the tendons cannot be adjusted according to requirements. For this reason, a corresponding technical scheme needs to be designed to solve the existing technical problems.

Disclosure of Invention

The invention aims to provide an external prestressed reinforcement bundle mounting structure of a concrete box bridge, which solves the problems in the background art and meets the actual use requirements.

In order to achieve the purpose, the invention provides the following technical scheme: a prestressed reinforcement bundle mounting structure outside a concrete box bridge body comprises a concrete box bridge body, wherein a plurality of groups of concrete supporting plates are uniformly mounted inside the concrete box bridge body, an arch cavity channel is formed between every two adjacent groups of concrete supporting plates, reinforcing plates are vertically arranged inside the concrete supporting plates at two ends, through holes are formed in the plurality of groups of concrete supporting plates on the inner side, guide pipes are cast in the through holes, a plurality of groups of reinforcement bundles are inserted between the plurality of groups of guide pipes, two ends of each reinforcement bundle are connected with the reinforcing plates, the middle of each reinforcement bundle is of a horizontal structure, two sides of each reinforcement bundle are of inclined structures, steering devices are arranged on two sides of the middle of each reinforcement bundle and comprise a bottom plate fixed on the arch cavity channel, an adjusting box body is welded at the upper end of each bottom plate, an accommodating groove is formed inside each adjusting box body, and a cover plate is mounted at, the slot that is linked together with the holding tank is seted up at the middle part of apron, evenly be provided with the arm-tie that a plurality of groups combined reinforcement used in the slot, a plurality of groups the diaphragm that the level set up is connected to the bottom of arm-tie, slider and middle part welding have the sleeve pipe is installed at the both ends of diaphragm, two sets of spouts have been seted up to the inner wall symmetry of holding tank, the slider activity sets up in the spout, the intraductal thread groove that is formed with of cover, the thread inslot is provided with the threaded rod perpendicularly, the middle part welding of threaded rod has activity ring and end to install the handle, the mounting groove has still been seted up to the bottom of adjusting the box, the.

In a preferred embodiment of the present invention, the reinforcing plate is cast inside the concrete supporting plate, and four sets of anchor rods are inserted through the periphery of the reinforcing plate, and the end slots of the anchor rods are inserted into the concrete supporting plate.

As a preferred embodiment of the present invention, the surface of the concrete support plate is uniformly provided with a plurality of sets of reinforcing bar openings, the tendons are inserted into the reinforcing bar openings, and the end portions of the tendons are welded with limiting discs, the limiting discs are located on the inner sides of the reinforcing bar openings.

In a preferred embodiment of the present invention, the diameter of the limiting disc is larger than the diameter of the reinforcing opening.

As a preferred embodiment of the present invention, a rubber anti-wear pad is disposed inside the guide tube, a plurality of groups of water discharge holes are uniformly formed on the tube body below the guide tube, a water storage cavity is formed below the water discharge holes, and a plurality of groups of water discharge pipes are communicated with the outer end of the water storage cavity.

In a preferred embodiment of the present invention, the drain pipe is disposed at a lower end of the guide pipe and is inclined.

As a preferred embodiment of the present invention, the top of the pulling plate is provided with a guide opening, the tendons are inserted into the guide opening, the upper and lower ends of the guide opening are both provided with a limit bolt by a thread, and the inner ends of the two sets of limit bolts are abutted against the tendons.

Compared with the prior art, the invention has the following beneficial effects:

1. the design of this scheme has the tendon of consolidating the connection between precast concrete box bridge, can improve the wholeness of bridge through the tendon to there is special stand pipe in the junction design of tendon and pontic, can reduce the tendon to the damage of wall body, and install the tip fixed establishment who carries out the fixing to the tendon at the both ends of tendon, stability and the intensity that can effectual improvement tendon installation.

2. The device that turns to that the use turns to the tendon has been designed on the tendon, and this turns to the device and not only can turn to the tendon, can also finely tune the inclination of tendon as required.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a view showing the structure of a reinforcing plate according to the present invention;

FIG. 3 is a view showing the structure of the guide tube according to the present invention;

FIG. 4 is a structural view of a steering apparatus according to the present invention;

fig. 5 is a top view of the steering apparatus of the present invention.

In the figure: 1-concrete box bridge, 2-concrete supporting plate, 3-arched cavity channel, 4-reinforcing plate, 5-perforation, 6-guide pipe, 7-steel bar bundle, 8-steering device, 9-bottom plate, 10-adjusting box body, 11-accommodating groove, 12-cover plate, 13-slot, 14-pulling plate, 15-transverse plate, 16-sliding block, 17-sleeve pipe, 18-sliding groove, 19-threaded groove, 20-threaded rod, 21-movable ring, 22-handle, 23-installing groove, 24-anchor rod, 25-steel bar opening, 26-limiting disc, 27-rubber anti-abrasion pad, 28-water drain hole, 29-water storage cavity channel, 30-water drain pipe, 31-guide opening and 32-limiting bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a prestressed reinforcement bundle mounting structure outside a concrete box bridge body comprises a concrete box bridge 1, wherein a plurality of groups of concrete supporting plates 2 are uniformly mounted inside the concrete box bridge 1, an arched cavity 3 is formed between every two adjacent groups of concrete supporting plates 2, reinforcing plates 4 are vertically arranged inside the concrete supporting plates 2 at two ends, through holes 5 are formed in the concrete supporting plates 2 at the inner sides, guide pipes 6 are cast in the through holes 5, a plurality of groups of reinforcement bundles 7 are inserted between the guide pipes 6, two ends of each reinforcement bundle 7 are connected with the reinforcing plates 4, the middle of each reinforcement bundle 7 is of a horizontal structure, two sides of each reinforcement bundle 7 are of an inclined structure, steering devices 8 are arranged on two sides of the middle of each reinforcement bundle 7, each steering device 8 comprises a bottom plate 9 fixed on the arched cavity 3, an adjusting box body 10 is welded at the upper end of each steering device, an accommodating groove 11 is formed inside each adjusting box body 10, and a cover plate 12 is mounted at, slot 13 that is linked together with holding tank 11 is seted up at the middle part of apron 12, evenly be provided with the arm-tie 14 that a plurality of groups cooperation reinforcing bar 7 used in the slot 13, the bottom of a plurality of groups arm-tie 14 is connected with the diaphragm 15 that the level set up, slider 16 and the middle part welding have sleeve pipe 17 are installed to the both ends of diaphragm 15, two sets of spouts 18 have been seted up to the inner wall symmetry of holding tank 11, slider 16 activity sets up in spout 18, the inside thread groove 19 that is formed with of sleeve pipe 17, be provided with threaded rod 20 perpendicularly in the thread groove 19, the middle part welding of threaded rod 20 has activity ring 21 and end to install handle 22, mounting groove 23 has still been seted up to the bottom of adjusting box 10.

Further improved, as shown in fig. 2: the reinforcing plate 4 is cast inside the concrete supporting plate 2, four groups of anchor rods 24 are inserted into the periphery of the reinforcing plate, the end slots 13 of the anchor rods 24 are arranged in the concrete supporting plate 2, and the strength of connection and support of the reinforcing tendons 7 can be improved by the mode that the reinforcing plate 4 is internally arranged.

Further improved, as shown in fig. 2: a plurality of groups of reinforcing steel bar openings 25 are uniformly formed in the surface of the concrete support plate 2, the reinforcing steel bar bundles 7 are inserted into the reinforcing steel bar openings 25, the end parts of the reinforcing steel bar bundles 7 are welded with limiting discs 26, the limiting discs 26 are located on the inner sides of the reinforcing steel bar openings 25, the reinforcing steel bar bundles 7 are inserted into the inner sides of the reinforcing plate 4, and the reinforcing plate 4 and the inner side of the concrete support plate 2 are designed to improve the strength and the stability of the end parts of the reinforcing steel bar bundles 7.

Further improved, as shown in fig. 2: the diameter of limiting disc 26 is larger than the diameter of reinforcing opening 25, and this design is convenient for limiting installation of tendon 7.

In a further improvement, as shown in fig. 3: the rubber anti-abrasion pad 27 is arranged inside the guide pipe 6, a plurality of groups of drain holes 28 are uniformly formed in the pipe body below the guide pipe, a water storage cavity channel 29 is formed below the drain holes 28, the outer end of the water storage cavity channel 29 is communicated with a plurality of groups of drain pipes 30, the rubber anti-abrasion pad 27 is arranged inside the guide pipe 6, the purpose of preventing the tendon 7 from being abraded can be achieved, the drain holes 28 and the water storage cavity channel 29 are designed below the guide pipe, and finally, permeated water is discharged outside through the drain pipes 30.

In a further improvement, as shown in fig. 3: the water discharge pipe 30 is positioned at the lower end of the guide pipe 6 and is arranged in an inclined manner, and the water seepage entering the through hole 5 is automatically discharged outwards in such a design mode.

Specifically, the top of the tie plate 14 is provided with a guide opening 31, the tendons 7 are inserted into the guide opening 31, the upper end and the lower end of the guide opening 31 are both provided with a limit bolt 32 through threads, and the inner ends of the two sets of limit bolts 32 are abutted against the tendons 7, so that the design mode is convenient for inserting the tendons into the guide openings 31 of the tie plates 14 in sequence and screwing and fixing the tendons through the limit bolts 32.

When in use: the invention firstly cuts groove bodies with the same specification of reinforcing plates 4 on concrete supporting plates 2 at two ends, penetrates the end parts of reinforcing steel bars 7 through reinforcing steel bar openings 25 and is welded on limiting discs 26 at the inner sides of the reinforcing plates 4, then the reinforcing plates 4 are arranged in the groove bodies and are subjected to concrete pouring, secondary reinforcing treatment is carried out on the periphery of the reinforcing plates 4 through levers 24, then the concrete supporting plates 2 at the inner sides are drilled with through holes 5, guide pipes 6 arranged in the through holes 5 are fixed in the through holes 5, the reinforcing steel bars 7 penetrate through each group of guide pipes 6, a steering device 8 is arranged at the position where the reinforcing steel bars 7 need to be steered, the reinforcing steel bars penetrate through a guide opening 31 and are screwed and fixed through limiting bolts 32, when the angle of the reinforcing steel bars 7 needs to be finely adjusted, a worker can drive a threaded rod 20, and the driving transverse plate 15 to move downwards when the driving rod 20 rotates clockwise, thereby drive arm-tie 14 and tendon 7 to adjust down, drive diaphragm 15 upwards moves when actuating lever 20 anticlockwise rotates to drive arm-tie 14 and tendon 7 to adjust upwards, can improve the adjusting effect and the efficiency of turning to device 8 to tendon 7 through this way, whole bridge has the above-mentioned tendon 7 mounting structure of a plurality of groups to constitute.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an external prestressing steel bunch mounting structure of concrete box bridge, includes concrete box bridge (1), concrete box bridge (1) inside evenly installs a plurality of groups concrete support board (2), is formed with arch chamber between adjacent two sets of concrete support board (2) and says (3), its characterized in that: the concrete supporting plates (2) at two ends are internally and vertically provided with reinforcing plates (4), a plurality of groups of concrete supporting plates (2) at the inner side are provided with through holes (5), guide pipes (6) are cast in the through holes (5), a plurality of groups of steel bars (7) are inserted between the guide pipes (6), two ends of the steel bars (7) are connected with the reinforcing plates (4), the middle part of each steel bar (7) is of a horizontal structure, two sides of each steel bar (7) are of an inclined structure, two sides of the middle part of each steel bar (7) are respectively provided with a steering device (8), each steering device (8) comprises a bottom plate (9) fixed on an arched cavity (3), an adjusting box body (10) is welded at the upper end of the bottom plate, an accommodating groove (11) is formed inside the adjusting box body (10), the top of the adjusting box body is provided with a cover plate (12), the middle part of the cover plate (12) is provided with an, evenly be provided with arm-tie (14) that a plurality of groups combined tendon (7) used in slot (13), a plurality of groups the bottom of arm-tie (14) is connected with diaphragm (15) that the level set up, slider (16) and middle part welding have sleeve pipe (17) are installed at the both ends of diaphragm (15), two sets of spout (18) have been seted up to the inner wall symmetry of holding tank (11), slider (16) activity sets up in spout (18), sleeve pipe (17) inside is formed with thread groove (19), be provided with threaded rod (20) in thread groove (19) perpendicularly, the middle part welding of threaded rod (20) has activity ring (21) and end to install handle (22), mounting groove (23) have still been seted up to the bottom of adjusting box (10), activity ring (21) activity sets up in mounting groove (23).

2. The external prestressed reinforcement bundle mounting structure for concrete box bridge according to claim 1, characterized in that: the reinforcing plate (4) is cast in the concrete support plate (2), four groups of anchor rods (24) are inserted into the periphery of the reinforcing plate, and the tail end slots (13) of the anchor rods (24) are arranged in the concrete support plate (2).

3. The external prestressed reinforcement bundle mounting structure for concrete box bridge according to claim 2, characterized in that: the concrete support plate is characterized in that a plurality of groups of steel bar openings (25) are uniformly formed in the surface of the concrete support plate (2), the steel tendons (7) are inserted into the steel bar openings (25) in a penetrating mode, the end portions of the steel tendons are welded with limiting discs (26), and the limiting discs (26) are located on the inner sides of the steel bar openings (25).

4. The external prestressed reinforcement bundle mounting structure for concrete box bridge according to claim 3, characterized in that: the diameter of the limiting disc (26) is larger than that of the reinforcing steel bar opening (25).

5. The external prestressed reinforcement bundle mounting structure for concrete box bridge according to claim 1, characterized in that: the rubber anti-abrasion pad (27) is arranged inside the guide pipe (6), a plurality of groups of drain holes (28) are uniformly formed in the pipe body below the guide pipe, a water storage cavity (29) is formed below the drain holes (28), and the outer end of the water storage cavity (29) is communicated with a plurality of groups of drain pipes (30).

6. The external prestressed reinforcement beam installation structure for concrete box bridge according to claim 5, characterized in that: the drain pipe (30) is positioned at the lower end of the guide pipe (6) and is arranged in an inclined manner.

7. The external prestressed reinforcement bundle mounting structure for concrete box bridge according to claim 3, characterized in that: the top of the pull plate (14) is provided with a guide opening (31), the tendons (7) are inserted into the guide opening (31), the upper end and the lower end of the guide opening (31) are both provided with limiting bolts (32) in a threaded manner, and the inner ends of the two groups of limiting bolts (32) are abutted to the tendons (7).