CN101967799B - Light-weight truss cradle - Google Patents

Abstract

The invention relates to special construction equipment for the form assembly/removal of a bridge percussion wall, the concrete casting construction of a cantilever, the stretching of transverse prestressing tendons of a box girder and the suspended external decoration construction of a high-speed railway, an overhead road and the like, in particular to a light-weight truss cradle. The invention is characterized in that the truss cradle comprises a major truss structure, a suspension system, a tail counterweight balance system and a traveling system, wherein the major truss structure is provided with a plurality of frame structures formed by welding of channel steel and I-beam steel; the suspension system is arranged at one side of the major truss structure; the tail counterweight balance system is arranged at the other side of the major truss structure opposite to the suspension system; and the traveling system is symmetrically installed on a plurality of steel wheel support structures at both sides of a flange plate on the bottom surface of the major truss structure and is used for enabling the cradle to move and travel on the bridge floor. The cradle has the advantages of simple structure, light weight and fast assembly and disassembly; the cradle can travel on the bridge floor, thereby facilitating transport and preservation; the height of the cantilever is adjustable, thereby realizing high adaptability; and the structure is formed by the combination of multiple sections, thereby ensuring simple assembly and high exchangeability.

Description

Light Truss Hanging Basket

technical field

The invention relates to special construction equipment for formwork removal of anti-collision wall groups of bridges such as high-speed railways and elevated roads, cantilever pouring concrete construction, box girder transverse prestressed beam tensioning operations, and hanging exterior decoration construction, in particular to a light truss hanging basket.

Background technique

At present, in the demolition of anti-collision walls of bridges such as high-speed railways and elevated roads, cantilever concrete construction, box girder transverse prestressed beam tensioning operations, and suspension decoration construction, floor-to-ceiling steel pipe scaffolding, suspended formwork supports, and triangular supports are mostly used. Formwork support or suspended steel pipe formwork support, etc. Ground steel pipe scaffolding has high requirements on the site, a large amount of steel pipes, and a long construction period. It cannot be used for the construction of overpass bridges or the construction of existing lines on spans; the installation and removal of suspended formwork supports and triangular formwork supports are difficult, and the safety risks are large; Formwork support requires pre-embedded pull-out steel bars during the construction of the bridge deck concrete pavement and welds them with steel pipes to prevent the support system from overturning. It has low rigidity, high cost, and complex structure.

Contents of the invention

The purpose of the present invention is to provide a light-duty truss hanging basket according to the shortcomings of the above-mentioned prior art. The balance system and the walking system overcome the deficiencies in the above-mentioned technologies, and provide a hanging basket with simple assembly and strong interchangeability.

The object of the present invention is realized by the following technical solutions:

A light-duty truss hanging basket, which is used for formwork removal of bridge anti-collision walls, cantilever pouring concrete construction, box girder transverse prestressed beam tensioning operation and hanging external decoration construction, is characterized in that the truss hanging basket includes:

The main structure of the truss has a plurality of frame structures welded by channel steel and I-beam. The upper and lower ends of the frame structure are equipped with flange plates, and the channel steel is welded with steel plate earrings with round holes, and Bolted together with the steel plate earrings through the angle steel structure;

The suspension system is set on one side of the main structure of the truss, and is composed of at least one set of upper cantilever I-beams and square steel pipes vertically connected to each other. The upper cantilever I-beam and the flange plate at the upper end of the main structure of the truss Arranged in parallel and bolted, the square steel pipe is movably connected to the upper cantilever I-beam;

The tail counterweight balance system is located on the other side of the truss main structure relative to the suspension system, and is bolted to the flange plate of the truss main structure. The tail counterweight balance system consists of upper and lower ends The square steel pipe bolted by the flange plate is used as the hanging rod, and the channel steel and the square steel pipe are bolted together as a whole;

The walking system is a plurality of steel wheel support structures symmetrically installed on both sides of the flange plate on the bottom surface of the truss main structure, and is used for the hanging basket to move and walk on the bridge surface.

The steel plate earrings are symmetrically distributed up, down, left, and right in the main structure.

The specific method for the movable connection of the square steel pipe and the upper cantilever I-beam is as follows: the square steel pipe and the end of the upper cantilever I-beam are connected through a sleeve pin structure.

In the bushing pin structure: the distance between any two adjacent pin bolting holes in the vertical direction is 10cm, and the number of the pin bolting holes is 7; the connecting bolts are pinned with M20 high-strength bolts of grade 8.8.

The number of the vertically connected upper cantilever I-beams and square steel pipes is 4 groups.

The steel wheel support structure includes a support plate for bolting and fixing to the bottom surface of the truss main structure, two parallel wheel frames are welded at the lower end of the support plate, and the other ends of the wheel frames are respectively provided with Corresponding to the copper sleeve bearings, a main shaft is set in the two copper sleeve bearings, and a roller is fixedly arranged on the main shaft.

The diameter of the roller is 100mm.

The number of the steel wheel support structures is 8, which are equally divided into two groups and symmetrically distributed at the bottom of the truss main structure.

The four steel wheel support structures on each side are all flattened by steel plates or channel steels.

The advantages of the present invention are: the hanging basket is simple in structure, light and handy, and can be assembled and disassembled quickly; it can walk along the bridge deck, is convenient for handling and storage; Strong interchangeability.

Description of drawings

Accompanying drawing 1 is the front view of the general assembly of the embodiment of the present invention;

Accompanying drawing 2 is the top view of the general assembly of the embodiment of the present invention;

Accompanying drawing 3 is the schematic diagram of the main body structure of the truss of the embodiment of the present invention;

Accompanying drawing 4 is the structure schematic diagram of steel wheel bearing of the embodiment of the present invention.

Detailed ways

The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

As shown in Figures 1 to 4, the general reference numerals 1-13 respectively represent: truss main structure 1, suspension system 2, support connection system 3, tail counterweight balance system 4, walking system 5, upper cantilever I-beam 6 , Square steel pipe 7, support plate 8, wheel frame 9, copper sleeve bearing 10, main shaft 11, roller 12, pin bolt connection hole 13.

Referring to Fig. 1-4, the basic structure of hanging basket structure in the present invention can be divided into truss main structure 1, hanging system 2, supporting connection system 3, tail counterweight balance system 4, and walking system 5 according to different purposes.

1 Truss main structure 1

The main structure 1 of the truss is a truss, and the material is Q345 ordinary low-alloy structural steel No. 10 channel steel and No. 8 I-beam welded into a row structure. Flange plates are installed at the upper and lower ends to mainly bear the suspension system 2 and the tail counterweight. The vertical shear force transmitted from balance system 4. Steel plate earrings with round holes are welded on the No. 10 channel steel. Its purpose is to insert the steel sleeve bolts on the supporting connection system 3 into the holes during assembly, so that the truss and the supporting connecting system 3 are tightly connected to bear the force together, forming Framework. All connection holes on the truss are symmetrical up and down, left and right, and can be used interchangeably.

2 hanging system 2

The suspension system 2 is the main working device for hanging basket construction. Its main material is square steel pipe 7 and upper cantilever I-beam 6. The spacing is adjusted, and the maximum lifting value is 60cm. The spacing between any two adjacent pin bolt connection holes 13 in the vertical direction is 10cm, and the number of pin bolt connection holes 13 is 7. The pins are connected with 8.8-grade M20 high-strength bolts. The eyelets on the top surface of the I-beam are used to connect the supporting frame and an angle steel to form a whole of four rows of hanging beams. The flange holes on the bottom surface of the I-beam are used to connect with the flange bolts on the truss.

3 Support connection system 3

The main material of the supporting connection system 3 is angle steel, which is divided into two types: large and small. Applied to the connection between trusses, the small support frame forms the main stable member of the hanging basket frame structure. Large support frames form the integrity of a 6m long unit. The dimensions of the support frames are different, so they cannot be used universally, but the connection forms of the support connection system 3 are all connected with steel sleeve bolts and truss holes, and the connection bolts can be interchanged for common use.

4 Tail counterweight balance system 4

The tail counterweight balance system 4 is mainly used as a platform for hanging basket anti-overturning and safely placing ballast materials. Its material is 100×50×5mm square steel pipe as the hanging rod, all of which are connected by flange plate bolts, and the platform structure is connected by No. 10 ordinary channel steel and square steel pipe bolts. The installation dimensions of the boom are all interchangeable.

5 walking system 5

The walking system 5 is mainly used for the overall movement of the unit structure after the hanging basket is assembled, and is a plurality of steel wheel support structures symmetrically installed on both sides of the flange plate on the bottom surface of the truss main structure 1 . The steel wheel support structure includes a support plate 8 for bolting and fixing to the bottom surface of the truss main structure 1, two parallel wheel frames 9 are welded on the lower end of the support plate 8, and the other ends of the wheel frames 9 are provided with corresponding Copper sleeve bearing 10, a main shaft 11 is set in two copper sleeve bearings 10, and a roller 12 with a diameter of 100mm is fixedly provided on the main shaft. The reason for using the copper sleeve bearing 10 is that the environment in the bridge construction is harsh, ordinary bearings are prone to failure, and the structure of the copper sleeve bearing 10 itself leads to large resistance, especially the large difference between the coefficient of static friction and the coefficient of dynamic friction, making it easy to be static and fixed. . Grease should be added when the steel wheel support structure is assembled to ensure lubrication and reduce parts wear, and all parts can be disassembled for easy maintenance.

The structure of the hanging basket designed in the present invention has been described in detail above, and the above-mentioned device structure is described below for the assembly operation requirements of the hanging basket:

(1) Before operating the hanging basket, you must be familiar with the structure brief in the manual. Designate specific management personnel, understand the main assembly sequence of the structure, and take necessary protective measures for use and storage to ensure the integrity of the hanging basket structural parts.

(2) When the hanging basket is assembled on the viaduct, the suspension device should be installed on the working platform on the side of the bridge of the existing railway line.

(3) After the 6-meter-long hanging basket of a unit body is assembled, it can be manually pushed or hoisted and dragged to move forward along the bridge.

(4) The walking system 5 of each hanging basket unit structure is equipped with 8 steel wheels to support the bridge deck. In order to ensure that the steel wheels can bear the weight of the hanging basket at the same time, the four wheels on each side must be flattened, and the flattened material should be steel plate or channel steel larger than No. 20. Especially when the wheels pass through the expansion joints at the end of the bridge, the transition must be flattened.

(5) In order to prevent tools, concrete particles and sundries from falling during construction, the bottom panel and side panels of the suspension system 2 are all closed with 18 mm thick wooden formwork. The top of the side panel is 2 meters high and closed with a dense mesh. The fixing method is to drill holes on the wooden board and bind with 4mm iron lead wire. This requirement is more important in the construction of the upper span railway section.

(6) The connecting bolts of the front hanging square steel pipe 7 and the sleeve of the hanging basket must be pinned with M20 high-strength bolts of grade 8.8.

(7) The tail ballast material chooses concrete blocks with standard module weights for ballast, which can be transported and the weight is clear. It is required to stack on the outer side of the tail, and strive to distribute evenly. It is strictly forbidden to randomly pile up materials with irregular volume and weight for safety balance.

Claims (9)

1. a light-duty truss hanging basket, used for bridge anti-collision wall group formwork removal, cantilever pouring concrete construction, box girder transverse prestressed bundle tensioning operation and hanging external decoration construction, it is characterized in that described truss hanging basket comprises: The main structure of the truss has a plurality of frame structures welded by channel steel and I-beam. The upper and lower ends of the frame structure are equipped with flange plates, and the channel steel is welded with steel plate earrings with round holes, and Bolted together with the steel plate earrings through the angle steel structure; The suspension system is set on one side of the main structure of the truss, and is composed of at least one set of upper cantilever I-beams and square steel pipes vertically connected to each other. The upper cantilever I-beam and the flange plate at the upper end of the main structure of the truss Arranged in parallel and bolted, the square steel pipe is movably connected to the upper cantilever I-beam; The tail counterweight balance system is located on the other side of the truss main structure relative to the suspension system, and is bolted to the flange plate of the truss main structure. The tail counterweight balance system consists of upper and lower ends The square steel pipe bolted by the flange plate is used as the hanging rod, and the channel steel and the square steel pipe are bolted together as a whole; The walking system is a plurality of steel wheel support structures symmetrically installed on both sides of the flange plate on the bottom surface of the truss main structure, and is used for the hanging basket to move and walk on the bridge surface. 2. A light truss hanging basket according to claim 1, characterized in that: the steel plate earrings are symmetrically distributed up, down, left, and right in the main structure. 3. A light-duty truss hanging basket according to claim 1, characterized in that the specific way of the movable connection between the square steel pipe and the upper cantilever I-beam is: the square steel pipe and the upper cantilever I-beam The ends of the beams are connected by a sleeve pin structure. 4. A light-duty truss hanging basket according to claim 3, characterized in that in the pin structure: the distance between any two adjacent pin bolt holes in the vertical direction is 10cm, and the pin bolt hole The quantity is 7; the connecting bolts are pinned with M20 high-strength bolts of grade 8.8. 5. A light-duty truss hanging basket according to claim 1, characterized in that: the number of the vertically connected upper cantilever I-beams and square steel pipes is 4 groups. 6. A light-duty truss hanging basket according to claim 1, wherein the steel wheel support structure includes a support plate for bolting and fixing to the bottom surface of the truss main structure, and the support plate Two parallel wheel frames are welded on the lower end, and the other ends of the wheel frame are respectively provided with corresponding copper sleeve bearings. A main shaft is set in the two copper sleeve bearings, and a roller is fixedly arranged on the main shaft. 7. A light truss hanging basket according to claim 6, characterized in that: the diameter of the roller is 100mm. 8. A light-duty truss hanging basket according to claim 1 or 6, characterized in that: the number of the steel wheel support structures is 8, which are divided into two groups and symmetrically distributed in the main structure of the truss bottom. 9. A light-duty truss hanging basket according to claim 8, characterized in that: the four steel wheel support structures on each side are all made of steel plates or channel steels.

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