CN218951984U

CN218951984U - Quick installation protection structure crossing city existing bridge

Info

Publication number: CN218951984U
Application number: CN202223211238.8U
Authority: CN
Inventors: 于洋; 刘子旗; 薛继申; 于光泽; 曲世杰; 李景新
Original assignee: CCCC First Harbor Engineering Co Ltd; No 3 Engineering Co Ltd of CCCC First Harbor Engineering Co Ltd
Current assignee: CCCC First Harbor Engineering Co Ltd; No 3 Engineering Co Ltd of CCCC First Harbor Engineering Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-05-02
Anticipated expiration: 2032-12-01

Abstract

The utility model relates to the field of construction of city bridge crossing existing lines, in particular to a rapid installation protection structure of a crossing city existing bridge. The support comprises a bottom support system and an upper working platform, wherein the support system comprises a plurality of upright post systems and a tie rod system for connecting adjacent upright post systems; the upright post system comprises a quick splicing unit I and a quick splicing unit II; the tie rod system comprises a steel upright post and a second connecting rod for connecting the steel upright posts of the upright post system; one side of the steel upright post is movably connected with the diagonal bracing through a movable connecting plate and a pin shaft; the steel column top of the support system is connected with longitudinal beam I-steel, a plurality of support beams are connected between the two I-steel, steel plates are paved on the support beams, and galvanized angle irons and galvanized screws with insulating caps are used for hanging the anti-electric insulating plates on two sides of the bottom of each support beam. The utility model avoids the influence on the existing line, can normally operate in the protection period, effectively improves the construction efficiency and has wide application prospect.

Description

Quick installation protection structure crossing city existing bridge

Technical Field

The utility model relates to the field of construction of city bridge crossing existing lines, in particular to a rapid installation protection structure of a crossing city existing bridge.

Background

Urban bridge construction is limited by urban planning, construction environment is complex, the situation of crossing the built urban bridge is very common, the high-voltage line attached to the urban electrified bridge has great potential safety hazard to the construction process of new construction, the passing time, safety and the like of the existing line are greatly influenced during construction operation, and the protection of the existing line is enhanced while the construction quality and progress of the urban bridge are ensured, so that the urban electrified bridge is a key point of similar engineering.

Disclosure of Invention

The utility model aims at bridge construction of crossing the existing line in the city, and provides a rapid installation protection structure which can realize standardization, is convenient and safe to construct and has small social influence, so as to solve the problems of close distance to a high-voltage line, high safety risk, slow construction progress and the like of similar projects.

The technical scheme adopted by the utility model for achieving the purpose is as follows: the rapid installation protection structure for the existing bridge crossing the city comprises a bottom bracket system and an upper working platform, and is characterized in that the bracket system comprises a plurality of upright post systems and a tie rod system for connecting adjacent upright post systems; the upright post system comprises a first quick assembly unit and a second quick assembly unit, wherein the first quick assembly unit comprises two steel upright posts and a first connecting rod connected between the two steel upright posts, the second quick assembly unit comprises a steel upright post and a first connecting rod used for being connected with the first steel upright post of the quick assembly unit, and the first connecting rod is a cross rod and an inclined rod alternately forming a plurality of triangular structures; the tie rod system comprises a steel upright post and a second connecting rod for connecting the steel upright post of the upright post system, wherein the second connecting rod is a plurality of rows of cross rods which are connected to the two sides of the steel upright post and correspond to the first cross rod of the connecting rod in position; one side of the steel upright post is movably connected with the diagonal bracing through a movable connecting plate and a pin shaft; the steel column top of the support system is connected with longitudinal beam I-steel, a plurality of support beams are connected between the two I-steel, steel plates are paved on the support beams, and galvanized angle irons and galvanized screws with insulating caps are used for hanging the anti-electric insulating plates on two sides of the bottom of each support beam.

The steel upright post is a seamless steel pipe column with the diameter of 402mm, the wall thickness is 14mm, the distance is 3.15-3.3m, the height is 15.5m, lifting lugs are arranged on the side wall of the upright post, and the diagonal bracing is a seamless steel pipe column with the diameter of 402 mm.

The longitudinal beam I-steel is 20a I-steel, the bracket cross beam is 45C I-steel, the single length is 12m, the cross beam spacing is 0.5m, and the steel plate is a 1cm thick steel plate.

And the two sides of the bottom of each bracket beam are hung on the anti-electricity insulating plate by using galvanized angle irons with the length of 50mm multiplied by 50mm and galvanized screws with insulating caps with the length of M16 multiplied by 60.

The utility model provides a set of standardized protective structure in the construction of a newly-built bridge crossing the existing common bridge and electrified bridge, and adopts the anti-electric insulating plate to protect the high-voltage line, thereby improving the safety; the self-made limiting device is utilized to ensure that the I-steel does not fall off, and the limiting device can be utilized as a slideway to dismount the I-steel when the I-steel is dismounted; the special steel structure mounting structure and the special steel structure mounting process are designed, so that the upright post and the diagonal bracing are guaranteed to be mounted once, and the steel structure mounting structure can be directly used for similar projects and can accelerate the construction progress of the similar projects; the influence on the existing line is avoided, normal operation can be performed during the protection period, the construction efficiency is effectively improved, and the application prospect is very broad.

Drawings

FIG. 1 is an overall block diagram of the assembled utility model;

FIG. 2 is a side view I of the present utility model after assembly;

FIG. 3 is a second side view of the assembled utility model;

FIG. 4 is an enlarged view of the spacing angle of the present utility model;

FIG. 5 is a schematic view of the assembled column system of the present utility model;

FIG. 6 is a schematic diagram of a tie bar system of the present utility model;

FIG. 7 is a schematic view of a mobile diagonal brace of the present utility model;

FIG. 8 is a schematic view of a connection of an insulation board according to the present utility model;

in the figure: steel plate 1, longitudinal beam I-steel 2, limit angle steel 3, electricity-proof insulating plate 4, steel upright post 5, diagonal brace 6, movable connecting plate 7, quick assembly unit I8, quick assembly unit II 9, connecting rod I10, connecting rod II 11, bracket beam 12, galvanized angle iron 13 and galvanized screw 14.

Detailed Description

Examples

As shown in fig. 1 to 3, a rapid installation protection structure for an existing bridge crossing a city comprises a bottom bracket system and an upper working platform, wherein the bracket system comprises a plurality of upright post systems and a tie rod system for connecting adjacent upright post systems; as shown in fig. 5, the upright post system comprises a quick assembly unit one 8 and a quick assembly unit two 9, the quick assembly unit one 8 comprises two steel upright posts 5 and a connecting rod one 10 connected between the two steel upright posts, the quick assembly unit two 9 comprises a steel upright post 5 and a connecting rod one 10 used for being connected with the steel upright post of the quick assembly unit one 8, and the connecting rod one 10 is a plurality of triangular structures formed by alternately arranging a cross rod and a diagonal rod; as shown in fig. 6, the tie rod system comprises a steel upright 5 and a second connecting rod 11 for connecting the steel upright of the upright system, wherein the second connecting rod 11 is a plurality of rows of cross rods which are connected to two sides of the steel upright 5 and correspond to the first 10 cross rods in position; as shown in fig. 7, one side of the steel upright post 5 is movably connected with the diagonal brace 6 through a movable connecting plate 7 and a pin shaft; after the bracket system is assembled, the top ends of the steel upright posts 5 are connected with longitudinal beam I-beams 2, a plurality of bracket cross beams 12 are connected between the two I-beams, steel plates 1 are paved on the bracket cross beams 12, and as shown in fig. 8, galvanized angle irons 13 with the thickness of 50mm multiplied by 50mm and galvanized screws 14 with insulating caps of M16 multiplied by 60 are used for hanging the electric insulation plates 4 on two sides of the bottom of each bracket cross beam 12.

The steel upright post 5 is a seamless steel pipe column with the diameter of 402mm, the wall thickness is 14mm, the distance is 3.15-3.3m, the height is 15.5m, lifting lugs are arranged on the side wall of the upright post, and the diagonal bracing 6 is a seamless steel pipe column with the diameter of 402 mm.

The longitudinal beam I-steel 2 is 20a I-steel, the bracket cross beam 12 is 45C I-steel, the length of a single beam is 12m, the distance between the cross beams is 0.5m, and the steel plate 1 is a 1cm thick steel plate.

Before hoisting, the upright post system and the tie rod system are spliced into an integral hoisting unit on the ground and welded. Firstly hoisting the upright post system, welding the bottom diagonal brace with the embedded part, secondly hoisting and welding the other upright post system adjacent to the bottom diagonal brace, and then hoisting and welding the tie rod system between the two upright post systems. After the two rows of bracket systems are assembled, the top ends of the mounting steel upright posts 5 are connected with the longitudinal beam I-steel 2. And then hoisting the support beams 12 in place in the skylight time, hanging an anti-electricity insulating plate 4 in the installation process of the support beams 12, wherein the whole construction process is in a power failure state, the insulating plate adopts the anti-electricity insulating plate provided by a professional manufacturer, the anti-electricity insulating plate is suitable for insulating an electrified overline bridge, in order to ensure the stability and insulativity of the insulating plate after installation, the insulating plate is installed at the corresponding position of each support beam 12 according to the position of the contact net, and the two sides of I-steel are hung on the insulating plate by using 50X 50 galvanized angle irons 13 and M16X 60 galvanized screws 14 with insulating caps. A 10mm thick steel plate is paved on the bracket beam 12 to form a working platform. And synchronously constructing the girder buttresses at two sides of the support, and hoisting the girder onto the girder buttresses in blocks after the support platform is erected.

And (3) dismantling a bracket:

after the construction of the upper bridge structure is completed, the protective structure can be integrally dismantled, and the dismantling sequence is from top to bottom, namely a top steel panel, an I45C I-steel beam, an inclined strut, a steel pipe buttress with the diameter of 402mm and an inclined strut.

Firstly, dismantling a top steel plate and a top longitudinal I-steel, wherein a structural object exists above the steel plate and the I-steel, and the mechanical equipment cannot be directly adopted for hoisting and dismantling, and the dismantling principle is that 45X 45 limiting angle steel 3 welded on two sides of the I-steel of a longitudinal beam and a bracket beam 12 is used as a slideway, as shown in fig. 4, the I-steel slides along the transverse direction, after the projection range of a steel box beam is slipped, a crane is adopted for hoisting and dismantling, and after the connection between a stand column and the stand column is cut off by adopting gas welding, the dismantling time is the window period after the existing line is stopped.

The above technical solution only represents the preferred technical solution of the present utility model, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present utility model, and the technical solution falls within the scope of the present utility model.

Claims

1. The rapid installation protection structure for the existing bridge crossing the city comprises a bottom bracket system and an upper working platform, and is characterized in that the bracket system comprises a plurality of upright post systems and a tie rod system for connecting adjacent upright post systems; the upright post system comprises a first quick assembly unit and a second quick assembly unit, wherein the first quick assembly unit comprises two steel upright posts and a first connecting rod connected between the two steel upright posts, the second quick assembly unit comprises a steel upright post and a first connecting rod used for being connected with the first steel upright post of the quick assembly unit, and the first connecting rod is a cross rod and an inclined rod alternately forming a plurality of triangular structures; the tie rod system comprises a steel upright post and a second connecting rod for connecting the steel upright post of the upright post system, wherein the second connecting rod is a plurality of rows of cross rods which are connected to the two sides of the steel upright post and correspond to the first cross rod of the connecting rod in position; one side of the steel upright post is movably connected with the diagonal bracing through a movable connecting plate and a pin shaft; the steel column top of the support system is connected with longitudinal beam I-steel, a plurality of support beams are connected between the two I-steel, steel plates are paved on the support beams, and galvanized angle irons and galvanized screws with insulating caps are used for hanging the anti-electric insulating plates on two sides of the bottom of each support beam.

2. The rapid installation protection structure for the existing bridge crossing the city according to claim 1, wherein the steel upright is a seamless steel pipe column with the diameter of 402mm, the wall thickness is 14mm, the distance is 3.15-3.3m, the height is 15.5m, lifting lugs are arranged on the side wall of the upright, and the diagonal bracing is a seamless steel pipe column with the diameter of 402 mm.

3. The rapid installation protection structure for the existing bridge crossing over the city according to claim 1, wherein the longitudinal beam I-steel is 20a I-steel, the bracket cross beam is 45C I-steel, the single length is 12m, the cross beam distance is 0.5m, and the steel plate is 1cm thick.

4. The rapid installation protection structure for existing bridges crossing cities according to claim 1, wherein the galvanized angle iron with the thickness of 50mm multiplied by 50mm and the galvanized screws with the insulation caps with the thickness of M16 multiplied by 60 are used for hanging the anti-electric insulation plates on two sides of the bottom of each bracket beam.