CN217869992U

CN217869992U - Steel truss girder lower chord member connecting operation platform

Info

Publication number: CN217869992U
Application number: CN202220338034.1U
Authority: CN
Inventors: 郑鹏程; 王昭; 殷建强; 蔡光辉; 校波
Original assignee: China Railway Sixth Group Co Ltd; Beijing Railway Construction Co of China Railway Sixth Group Co Ltd
Current assignee: China Railway Sixth Group Co Ltd; Beijing Railway Construction Co of China Railway Sixth Group Co Ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2022-11-22
Anticipated expiration: 2032-02-18

Abstract

A steel truss girder lower chord member connecting operation platform. The device comprises a top fixed connection support, a side upper and lower channel and a bottom operating platform; the bottom operating platform comprises a bottom support, a fence and a pattern steel plate; the top fixed connection support comprises a support arm and a connection plate; the side surface upper and lower channels comprise an upper channel and a lower channel; the utility model provides an operation platform is connected to steel longeron lower chord member spare has following effect: simple structure, safety protection in place, bearing capacity are strong, have ensured constructor's personal safety. In addition, the operation platform is convenient to assemble and disassemble and can be repeatedly utilized, and the operation platform can be installed and fixed on the lower chord member in advance on the ground before the lower chord member is hoisted, so that the operation platform is more convenient for field construction.

Description

Operation platform for connecting steel truss girder lower chord rod piece

Technical Field

The utility model belongs to the technical field of auxiliary assembly when steel longeron lower chord member butt joint is connected, in particular to steel longeron lower chord member connects operation platform.

Background

Steel girder bridges have been widely used as large-span bridges and extra-large-span bridges at present because they combine the advantages of steel and truss structures. With the increase of infrastructure construction strength and traffic demand in China, more and more steel truss bridges are used for railway and highway construction. The steel truss is a truss structure formed by connecting different steel rods, and the connection modes of the different rods comprise high-strength bolt connection and welding connection. No matter the steel truss girder is constructed by adopting a suspension splicing method or a support method, an operation platform for connecting rod pieces by constructors is required to be arranged. However, the structure of the currently used operating platform is not designed reasonably, so that the operation is inconvenient and the safety is low.

Disclosure of Invention

In order to solve the problem, the utility model aims to provide a can satisfy constructor and little component and bear, the installation is simple, fixed firm, convenient transportation, reuse's steel longeron lower chord member connects operation platform again.

In order to achieve the purpose, the steel truss girder lower chord member connecting operation platform provided by the utility model comprises a top fixed connecting support, a side upper and lower channel and a bottom operation platform; wherein, the bottom operating platform comprises a bottom support, a fence and a pattern steel plate; the bottom support is of a grid structure formed by cross welding of longitudinal and transverse keels; the lower end of the fence is arranged at the edge of the bottom support; the pattern steel plate is laid on the top surface of the bottom support; the top fixed connection support comprises a support arm and a connection plate; the two supporting arms are arranged in parallel along the horizontal direction and are placed at the top of the lower chord member, one side of each supporting arm is connected with a plurality of connecting plates which are vertically arranged, and the connecting plates are fixed on the lower chord member; the side surface upper and lower channels comprise an upper channel and a lower channel; the lower channel is a frame consisting of an outer end face and two side faces, the lower end of the lower channel is fixed on a pattern steel plate of the bottom operating platform, and the side face opening is positioned on the inner side and used as an access channel for constructors; the other sides of the two supporting arms are respectively fixed at the tops of two side surfaces of the lower channel; the upper channel is a frame formed by an outer end face and two side faces, the lower ends of the two side faces are respectively fixed on the top faces of the two supporting arms, and the upper channel and the lower channel are aligned up and down and have the same side face opening position.

The lower channel is formed by connecting vertical channel steel and transverse angle steel; the upper channel is made by connecting a plurality of vertical and horizontal round steel.

The supporting arm is made of channel steel; the connecting plate is made of a steel plate.

The longitudinal and transverse keels on the bottom support are made of equilateral angle steel; the thickness of the figured steel plate is 3mm.

The utility model provides an operation platform is connected to steel longeron lower chord member spare has following effect:

simple structure, safety protection in place, bearing capacity are strong, have ensured constructor's personal safety. In addition, the operating platform is convenient to assemble and disassemble and can be repeatedly utilized, and the lower chord member can be installed and fixed on the lower chord member in advance on the ground before being hoisted, so that the field construction is more convenient.

Drawings

Fig. 1 is a perspective view of the structure of the steel truss girder lower chord member connection operation platform provided by the utility model.

Detailed Description

The following describes the steel truss girder lower chord member connection operation platform in detail with reference to the accompanying drawings and specific embodiments. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Now, a certain bridge engineering is taken as an example for explanation: the bridge is a municipal bridge and adopts a form of (119 +268+ 119) m upper stiffening continuous steel truss. The bridge steel truss girder is assembled by a support method, 88 lower chords are provided in total, the bridge steel truss girder is of a box-shaped structure, the inner width of the cross section is 1000mm, the inner height is 1200mm, the plate thickness is 20mm-44mm, 10.9-level high-strength bolts are adopted for connection, and the distance between the lower chords and the ground is 12-17m during construction. When guaranteeing the installation of last quarter member, the safety of workman's operation, this engineering chooses for use the utility model provides a steel truss girder last quarter member connects operation platform, this platform simple manufacture, install and remove convenience, safe and reliable are favorable to the construction operation on-spot.

As shown in fig. 1, the steel truss girder lower chord member connection operation platform provided by the utility model comprises a top fixed connection support 1, a side upper and lower channel 2 and a bottom operation platform 3; wherein, the bottom operating platform 3 comprises a bottom support, a fence and a pattern steel plate; the bottom support is of a grid structure formed by cross welding of longitudinal and transverse keels; the lower end of the fence is arranged at the edge of the bottom support; the pattern steel plate is laid on the top surface of the bottom support; the top fixed connection support 1 comprises a support arm 1-1 and a connection plate 1-2; the two supporting arms 1-1 are arranged in parallel along the horizontal direction and are placed at the top of the lower chord member, one side of each supporting arm 1-1 is connected with a plurality of connecting plates 1-2 which are vertically arranged, and the connecting plates 1-2 are fixed on the lower chord member; the lateral upper and lower channels 2 comprise an upper channel 2-1 and a lower channel 2-2; the lower channel 2-2 is a frame consisting of an outer end face and two side faces, the lower end of the lower channel is fixed on a patterned steel plate of the bottom operating platform 3, and an opening on the side face is positioned on the inner side and is used as an access channel for constructors; the other sides of the two supporting arms 1-1 are respectively fixed on the tops of two side surfaces of the lower channel 2-2; the upper channel 2-1 is a frame composed of an outer end face and two side faces, the lower ends of the two side faces are respectively fixed on the top faces of the two supporting arms 1-1, and the upper channel 2-1 and the lower channel 2-2 are aligned up and down and the opening positions of the side faces are the same.

The lower channel 2-2 is formed by connecting vertical channel steel and transverse angle steel; the upper channel 2-1 is made by connecting a plurality of vertical and horizontal round steel bars.

The supporting arm 1-1 is made of channel steel; the connecting plate 1-2 is made of steel plates.

The use method of the steel truss girder lower chord member connecting operation platform provided by the utility model is explained as follows:

when needs utilize the utility model provides a steel truss girder last quarter member connects operation platform carries out the last quarter member connection construction of steel truss bridge, at first place the support arm 1-1 that props 1 with this operation platform upper portion fixed connection at last quarter member top by constructor subaerial crane, then fix connecting plate 1-2 on last quarter member, later hoist the last quarter member together with this operation platform and take one's place. A constructor stands on the bottom operation table 3 to perform high-strength bolt connection or welding construction of the lower chord member, and in the process, construction tools and parts can be placed on the bottom operation table 3; and after the lower chord member is connected, cutting off the connecting plate 1-2, thus removing the connection between the operation platform and the lower chord member, finally hoisting the operation platform to the ground by using a crane, and repeating the operation process if the next lower chord member is required to be installed. In addition, in the construction process, the side openings on the side upper and lower channels 2 can be used for the entering and exiting of constructors; the transverse angle steel on the lower channel 2-2 and the transverse round steel on the upper channel 2-1 can be used as climbing ladders for constructors to climb up and down.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an operation platform is connected to steel longeron lower chord member spare which characterized in that: the steel truss girder lower chord member connecting operation platform comprises a top fixed connecting support (1), a side upper and lower channel (2) and a bottom operation table (3); wherein, the bottom operating platform (3) comprises a bottom support, a fence and a pattern steel plate; the bottom support is of a grid structure formed by cross welding of longitudinal and transverse keels; the lower end of the fence is arranged at the edge of the bottom support; the pattern steel plate is laid on the top surface of the bottom support; the top fixed connection support (1) comprises a support arm (1-1) and a connecting plate (1-2); the two supporting arms (1-1) are arranged in parallel along the horizontal direction and are placed at the top of the lower chord member, one side of each supporting arm (1-1) is connected with a plurality of connecting plates (1-2) which are vertically arranged, and the connecting plates (1-2) are fixed on the lower chord member; the lateral upper and lower channels (2) comprise an upper channel (2-1) and a lower channel (2-2); the lower channel (2-2) is a frame consisting of an outer end face and two side faces, the lower end of the lower channel is fixed on a patterned steel plate of the bottom operating platform (3), and the side face opening is positioned on the inner side and used as an access channel for constructors; the other sides of the two supporting arms (1-1) are respectively fixed at the tops of two side surfaces of the lower channel (2-2); the upper channel (2-1) is a frame consisting of an outer end face and two side faces, the lower ends of the two side faces are respectively fixed on the top faces of the two supporting arms (1-1), and the upper channel (2-1) and the lower channel (2-2) are aligned up and down and have the same side opening position.

2. The steel truss girder lower chord member connecting operation platform as claimed in claim 1, wherein: the lower channel (2-2) is formed by connecting vertical channel steel and transverse angle steel; the upper channel (2-1) is made by connecting a plurality of vertical round steel and transverse round steel.

3. The steel truss girder lower chord member connecting operation platform as claimed in claim 1, wherein: the supporting arm (1-1) is made of channel steel; the connecting plate (1-2) is made of steel plates.

4. The steel truss girder lower chord member connecting operation platform as claimed in claim 1, wherein: the longitudinal and transverse keels on the bottom support are made of equilateral angle steel; the thickness of the figured steel plate is 3mm.