CN220284626U - Rear pivot suspension bridge girder erection machine - Google Patents

Abstract

The utility model discloses a back pivot suspension bridge girder erection machine which mainly comprises a main truss, a track girder, a cross-link, a truss girder, a lifting mechanism with a rotation function, an anchor lug plate and a limiting steel plate. The main truss and the transverse connection are the main bearing structures of the erection machine, the girder of the truss vehicle and the lifting mechanism with the rotation form the movable bridge machine, the track beam is used as the supporting and force transmission structure of the movable bridge machine, the anchoring lug plate is arranged at the lower part of the main truss, and the erection machine is temporarily fixed on the installed steel girder. The rear pivot suspension bridge girder erection machine provided by the utility model has the advantages of wide application range, high work efficiency, high reliability, simple structural system, clear force transmission and high economy.

Description

Rear pivot suspension bridge girder erection machine

Technical Field

The utility model belongs to the field of design and construction of large-span suspension bridges, and particularly relates to a rear supporting point suspension bridge girder erection machine.

Background

The suspension bridge is widely applied at home and abroad due to large spanning capacity and mature design and construction technology, and the main girder erection scheme is an important technical point in the suspension bridge design and construction process, and is designed by considering various conditions such as transportation, hoisting, bridge site topography and the like at home and abroad. At present, the following steps are:

the cable crane method is mainly used for not navigating inland river or mountain terrain, and has the advantages of long construction period, high labor intensity, high cost, limited hoisting weight and great influence of wind load;

the cable-carrying crane method is mainly used for rivers, lakes and seas communicated with the channel and is required to have the condition of main beam section channel transportation and vertical lifting;

the floating crane method needs a certain lifting capacity of the floating crane, and is generally limited by factors such as water level, channel control and the like;

the bridge deck cantilever crane suspension splicing method is mainly suitable for cantilever splicing of steel truss girders, and rod units or node units are spliced in the air, so that the bridge deck cantilever crane suspension splicing method has the advantages of low efficiency, long construction period, high labor intensity and high safety risk, and is not suitable for a steel box girder structure;

the rail cable sliding method is only used once in a large-span suspension bridge, the technical maturity is not high, and mechanical equipment and special components are required to be customized;

disclosure of Invention

The utility model aims to provide a girder erection machine for a rear-fulcrum suspension bridge, which is mainly used for erecting a girder of a large-span steel box girder suspension bridge, and particularly can be used in environments such as mountain areas with limited girder transportation conditions, inner lakes which cannot navigate, or shoal areas with limited navigation, and the like, in which a cable-carried crane or a cable crane cannot be used as hoisting equipment, and has economy.

For this purpose, the utility model adopts the following technical scheme:

the main girder erection machine of the rear fulcrum suspension bridge is characterized by comprising a main truss, a track girder, a cross-link, a girder of a truss car, a lifting mechanism with a rotation function and a rear anchoring lug plate; the main truss comprises a left truss and a right truss, and the left truss and the right truss are connected into a whole by the transverse connection at the top to form a lifting channel which is positioned above the bridge deck and along the paving direction of the main girder and inside the main truss; the track beams are arranged along the length direction of the left side truss and the right side truss, are fixed on the upper part of the main truss and serve as supporting and moving tracks of the girder vehicle, load of the girder vehicle is transferred to the main truss, and the lifting mechanism with rotation is fixed at the lower end of the girder vehicle and plays roles in lifting and rotating girder segments; limiting steel plates are arranged at two ends of the track beam; the bottom of the back half part of the main truss is provided with an anchoring lug plate, and the anchoring lug plate can be temporarily bolted with the installed main girder to play a role in fixing the whole back pivot suspension bridge main girder erection machine.

Further, the bottom ends of the left truss and the right truss are provided with section steel along the length direction, and the section steel is in sliding fit with the installed main girder and is supported.

Further, the front ends of the left side truss, the right side truss and the track beams on the two sides are respectively picked forward, and diagonal trusses are connected between the bottoms of the front ends of the left side truss and the right side truss and the front ends of the track beams.

Compared with the existing steel box girder erection scheme, the rear pivot suspension bridge girder erection machine provided by the utility model has the advantages that:

(1) The box girder segments are transported, lifted and installed from the bridge deck, and the construction is not limited by the terrain and climate conditions.

(2) The erection machine factory is prefabricated or leased in advance, assembled on site, high in reliability, high in construction speed, economical in manufacturing cost and flexible in tonnage improvement and customization.

(3) The novel bridge girder erection machine can synchronously construct from the bridge tower to multiple working surfaces on two sides, and has the advantages of high efficiency, high speed and construction period saving.

(4) The erection machine is constantly loaded on the installed main beam, and has the advantages of simple structure system and definite stress.

(5) The bridge girder erection machine can enable the box girder structure to be rapidly and economically erected in environments with limited transportation and hoisting conditions such as canyons, shoals and the like.

Drawings

FIG. 1 is a schematic elevation view of a bridge girder erection machine according to the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model lifting a main beam;

FIG. 4 is a schematic cross-sectional view of the main beam of the present utility model after installation;

FIGS. 5-11 are schematic views of the whole process of the erection process of the present utility model; the method comprises the following steps of: assembling a bridge girder erection machine, pushing out and fixing the bridge girder erection machine, lifting up the girder segments, shifting the girder segments, lifting the girder segments into place, installing the girder segments and pushing out and fixing the bridge girder erection machine.

In the figure: 1. the girder comprises a main truss, a track beam, a transverse link, a truss girder, a lifting mechanism with a rotation, an anchor lug plate, a limit steel plate and a girder segment.

Detailed Description

According to fig. 1-11, the utility model provides a rear supporting point suspension bridge girder erection machine, which comprises a main truss 1, a track girder 2, a cross joint 3, a truss girder 4, a lifting mechanism 5 with a rotation function and a rear anchoring lug plate 6.

Referring to fig. 1 to 4, the main girder 1 and the cross-section 3 are main load-bearing structures of the girder 4, and have sufficient strength and rigidity, and the main girder 1 includes a left side girder 11 and a right side girder 12, and the left side girder 11 and the right side girder 12 are integrally connected by the cross-section 3 at the top to form a lifting channel 100 above a deck and along a girder erection direction inside the main girder 1. The track beam 2 is arranged along the length direction of the left side truss 11 and the right side truss 12, is fixed on the upper portion of the main truss 1, is used as a supporting and moving track of the truss girder 4, transmits the load of the truss girder 4 to the main truss 1, and is provided with a rotary lifting mechanism 5 which is fixed at the lower end of the truss girder 4 to play a role in lifting and rotating the girder segment 8, and the rotation axis of the lifting mechanism is a vertical horizontal plane. And limiting steel plates 7 are arranged at two ends of the track beam 2 to prevent the girder 4 from sliding out.

The bottom of main truss 1 and the girder 80 sliding fit who has installed and can promote the bridge crane and remove forward, specifically, the bottom of left side truss 11 and right side truss 12 sets up shaped steel 13 along length direction and slidingly cooperates and obtain the support with the girder 80 that has installed, and the bottom of the latter half of main truss 1 sets up anchor otic placode 6, anchor otic placode 6 and the interim bolt of girder 80 that has installed play the effect of fixing whole back fulcrum suspension bridge girder erection machine, can prop out girder erection machine forward and select long enough distance. The front ends of the left side truss 11, the right side truss 12 and the track beams 2 on the two sides are all picked forward, so that the side projection of the main truss is in an inverted straight foot trapezoid, the forward picking weight of the main girder erection machine can be reduced under the condition of the same picking length, and meanwhile, the rotation operation of the main girders is facilitated. A diagonal bracing truss 14 is connected between the bottoms of the front ends of the left side truss and the right side truss and the front end of the track beam 2.

Fig. 5 to 11 are steps of assembling the bridge girder erection machine (fig. 5), pushing out and fixing the bridge girder erection machine (fig. 6), lifting up the girder segments (fig. 7), shifting the girder segments (fig. 8), lifting the girder segments into place (fig. 9), installing the girder segments (fig. 10) and pushing out and fixing the bridge girder erection machine (fig. 11) respectively.

The method comprises the following specific steps:

when the erection machine is used, main beam hoisting is carried out from two sides of the bridge to the midspan:

(1) Assembling the erection machine: the main truss 1 of the erection machine and the anchor lug plate 6 at the lower part of the main truss are spliced on the No. 0 block of the main girder, the top cross joint 3 is installed, two main trusses (the left truss 11 and the right truss 12) are connected into a whole, the rail beam 2 is installed on the upper part of the main trusses, the rail beam 2 is a bearing support and a moving rail of the girder 4, after the rail beam 2 is installed, the girder 4 and the lifting mechanism 5 with the rotation are integrally installed on the rail beam 2, rectangular limit steel plates 7 are arranged at two ends of the rail beam 2, and the limit steel plates 7 are used for preventing the girder from sliding out of the rail beam.

(2) Setting up machine is put into place: pushing the erection machine out towards the erection direction of the main girder until the erection machine hangs the main girder to be close to half the length, and bolting and fixing the erection machine with an embedded part of the main girder top plate through an anchor lug plate 6 at the lower part of the rear half part of the main girder.

(3) Beam section transportation: after the girder segments are rotated by 90 degrees, the girder segments are pushed to the position right below the bridge girder erection machine through a girder transporting flat plate vehicle, the girder 4 of the girder erection machine is moved to a proper position, a lifting appliance of the lifting mechanism 4 is connected with a temporary lifting point on the girder, and after the girder is lifted, the girder is transported Liang Banche to be opened. The girder of the truss car and the lifting mechanism with the rotation can be operated by remote control.

(4) The beam section is in place: the girder segments to be installed are moved to the cantilever end of the bridge girder erection machine through the internal lifting channel 100, the girder segments are lowered below the main girder of the bridge girder erection machine at proper positions, the lifting mechanism 5 is operated to rotate in a rotating way, and the girder segments are reversely rotated for 90 degrees.

(5) And (3) beam section installation: and the girder segments are moved to the installation positions through the lifting mechanisms 5, the girder segments are connected with the suspenders and the assembled girders after the girder segments are well shaped, and the lifting appliances are released, so that the girder segments are completely installed.

(6) Shifting the erection machine: and (3) removing the temporary fixing of the anchor lug plate 6 at the lower part of the main truss and the main girder, pushing out the bridge girder erection machine to the girder erection direction, and assembling the main girder of the next section. And the steps are repeated in a circulating way until the main beams are folded.

The foregoing is only specific embodiments of the present utility model, but not limited to the present utility model, and all equivalent changes or modifications based on the technical features of the present utility model will be included in the scope of the technical solution of the present utility model.

Claims (3)

1. The main girder erection machine of the rear fulcrum suspension bridge is characterized by comprising a main truss, a track girder, a cross-link, a girder of a truss car, a lifting mechanism with a rotation function and a rear anchoring lug plate; the main truss comprises a left truss and a right truss, and the left truss and the right truss are connected into a whole by the transverse connection at the top to form a lifting channel which is positioned above the bridge deck and along the paving direction of the main girder and inside the main truss; the track beams are arranged along the length direction of the left side truss and the right side truss, are fixed on the upper part of the main truss and serve as supporting and moving tracks of the girder vehicle, load of the girder vehicle is transferred to the main truss, and the lifting mechanism with rotation is fixed at the lower end of the girder vehicle and plays roles in lifting and rotating girder segments; limiting steel plates are arranged at two ends of the track beam; the bottom of the back half part of the main truss is provided with an anchoring lug plate, and the anchoring lug plate can be temporarily bolted with the installed main girder to play a role in fixing the whole back pivot suspension bridge main girder erection machine.

2. A rear pivot suspension bridge girder erection machine as claimed in claim 1 wherein the bottom ends of the left and right side trusses are provided with section steel in the length direction, the section steel being slidably engaged with the installed girders and supported.

3. The rear pivot suspension bridge girder erection machine of claim 1, wherein front ends of the left side truss and the right side truss and the rail beams at both sides are all forwardly picked, and diagonal trusses are connected between bottoms of front ends of the left side truss and the right side truss and front ends of the rail beams.