阅读说明：本技术 一种适用于双线磁浮轨道梁的梁上运梁装置和架梁方法 (Beam-on-beam conveying device suitable for double-line magnetic floating track beam and beam erecting method ) 是由 刘延龙 田宝华 郭俊峰 肖红武 谭斌 李良才 翟勇 奚成 霍莉 林晓波 刘陈坤 于 2021-08-27 设计创作，主要内容包括：本发明涉及磁浮轨道技术领域,公开了一种适用于双线磁浮轨道梁的梁上运梁装置和架梁方法,运梁装置包括两榀轨道梁、连接装置和走行轨道,走行轨道架通过连接装置设于两榀轨道梁之间,走行轨道与轨道梁相互平行,走行轨道用于运梁车通行。走行轨道能够提供运梁车的运输路径,提供了待安装轨道梁的运输条件,从而不需要沿轨道线路规划重载、超长车辆的通行条件,取代了重载、超长车辆的使用,从而减少了施工的占地面积,降低了轨道梁的施工条件,适用于在城市中施工或施工线路长的工况,且相较于将走行轨道直接铺设在轨道梁上,本发明将走行轨道铺设于两榀轨道梁之间,走行轨道的轨距不受轨道梁尺寸的限制,从而适应于不同运梁装置的走行需求。(The invention relates to the technical field of magnetic levitation tracks, and discloses an on-beam transporting device and a beam erecting method suitable for a double-line magnetic levitation track beam. The walking track can provide a transportation path of a beam transporting vehicle and provides transportation conditions of the track beams to be installed, so that the passing conditions of heavy-load and ultra-long vehicles do not need to be planned along a track line, the use of the heavy-load and ultra-long vehicles is replaced, the occupied area of construction is reduced, the construction conditions of the track beams are reduced, and the walking track is suitable for working conditions of construction or long construction lines in cities.)

1. The on-beam transporting device suitable for the double-line magnetic floating track beam is characterized by comprising two track beams (1), a connecting device and a traveling track (3), wherein the traveling track (3) is erected between the two track beams (1) through the connecting device, the traveling track (3) and the track beams (1) are parallel to each other, and the traveling track (3) is used for a beam transporting vehicle to pass through.

2. The beam-on-beam conveying device suitable for the double-wire magnetic floating track beam is characterized in that the track gauge of the walking track (3) is larger than the beam body width of a single track beam (1).

3. The beam-on-beam conveying device suitable for the double-line magnetic floating track beam is characterized in that the connecting device comprises a cross beam (2), two ends of the cross beam (2) are respectively fixed on two track beams (1), the cross beams (2) are arranged at intervals along the extending direction of the track beams (1), and the walking track (3) is fixed above the cross beams (2).

4. The beam transporting device on the beam suitable for the double-line magnetic levitation track beam is characterized in that the connecting device comprises a cross beam (2) and a longitudinal beam (6), two ends of the cross beam (2) are respectively fixed on the two track beams (1), the cross beams (2) are arranged at intervals along the extending direction of the track beams (1), the longitudinal beam (6) is fixed above the cross beams (2) along the extending direction of the track beams (1), and the running track (3) is fixed above the longitudinal beam (6).

5. The beam-on-beam girder transporting device suitable for the double-line magnetic levitation track beam as claimed in claim 3 or 4, wherein pre-embedded sleeves (5) which are provided on the track beam (1) and used for installing F-rail cushion blocks are used as installation holes of the cross beam (2), and the cross beam (2) is fixedly connected with the pre-embedded sleeves (5) through fasteners.

6. The beam-on-beam girder transporting device suitable for the double-line magnetic floating track beam is characterized in that the cross beam (2) comprises a fixed section (21), a transition section (22) and a bearing section (23), the fixed section (11) serving as two ends of the cross beam (2) is fixed with the embedded sleeves (5), the bearing section (23) serving as the middle part of the cross beam (2) is used for supporting the running track (3), the transition section (22) is connected with the fixed section (21) and the bearing section (23), and the web height of the bearing section (23) is larger than that of the fixed section (21).

7. The beam-on-beam girder transporting device suitable for the double-line magnetic floating track beam is characterized in that the cross beam (2) is further provided with reinforcing plates (7), the reinforcing plates (7) are welded on two sides of a web plate of the cross beam (2), and the reinforcing plates (7) are arranged at the joint of the fixed section (21) and the embedded sleeve (5) and below the running track (3).

8. The device and the method for transporting and erecting the beam on the beam suitable for the double-line magnetic levitation track beam are characterized in that the walking track (3) is fixed to the connecting device through a fastener system (4), and the connecting device is H-shaped steel or channel steel.

9. The girder erection method using the girder erection device on the girder applicable to the double-line magnetic floating track girder according to claim 4, comprising the steps of:

A. completing the assembly of the bridge girder erection machine, wherein the bridge girder erection machine is in place in a span of a beam to be erected;

B. the beam transporting vehicle transports the rail beam to be installed to the lower part of the bridge girder erection machine, the bridge girder erection machine lifts the beam, and the left and right line rail beams are erected and adjusted in place;

C. a beam (2) is arranged between the erected track beams (1) by using a beam lifting trolley of the bridge girder erection machine;

D. a girder lifting trolley of the bridge girder erection machine is utilized, and a longitudinal beam (6) and a traveling track (3) are arranged on a cross beam (2);

E. completing the installation, fixation and inspection of the beam conveying device on the beam;

F. moving the bridge girder erection machine to the next span position;

G. the beam transporting vehicle transports the next span rail beam to be installed to the installation end through the beam transporting device on the beam, and the bridge girder erection machine hoists and erects the rail beam to be installed;

H. repeating the step C to the step G until the installation of the track beam in one area is completed;

I. and C, starting to install the track beams of the next area, and repeating the steps C to H until all the track beams are installed.

10. A girder erection method suitable for a girder erection device on a two-wire magnetic levitation track girder according to claim 9, wherein in step I, the cross girders (2), the longitudinal girders (6) and the running tracks (3) on the completed regional track girder are disassembled and used for the erection of the girder erection device on the next regional girder.

Technical Field

The invention relates to the technical field of magnetic levitation tracks, in particular to an on-beam conveying device and a beam erecting method suitable for a double-line magnetic levitation track beam.

Background

At present, a transport vehicle is generally adopted to transport the double-line medium-low speed magnetic floating track beam to an installation position, and the double-line medium-low speed magnetic floating track beam is installed in a mode of hanging the beam by a crane, the requirement of the erection method on a transport line and a construction site is high, the beam length of the double-line medium-low speed magnetic floating track beam is usually 25-30 m, and the self weight of a beam body is about 140-180 t, so that the passing conditions of heavy-load and overlong vehicles need to be planned along a running track line; when the construction line is long or under the working condition of construction in a city, the running track line often crosses obstacles or is extruded by surrounding buildings, so that the construction site is narrow and the passing condition of an ultralong vehicle is difficult to meet.

In addition, the urban traffic has strict restrictions on heavy-load and ultra-long vehicles, the vehicles are generally forbidden to enter main urban areas in rush hours, and special temporary roads are required to be developed in suburban areas, so that the construction cost is increased, construction sites for cranes and transport vehicles are developed, the occupied area for construction can be increased, and the construction condition restriction is increased.

Disclosure of Invention

The invention aims to: aiming at the problems that the traffic conditions of transport vehicles are difficult to meet and the construction floor area is large when the transport vehicles are adopted to transport track beams in the prior art, an on-beam transporting device and a beam erecting method suitable for the double-line magnetic levitation track beams are provided, the traffic conditions of heavy-load and ultra-long vehicles do not need to be planned along a walking track line, the on-beam transporting device can provide a transportation path of the beam transporting vehicle on the track beams, and the use of the heavy-load and ultra-long vehicles is replaced, so that the construction floor area is reduced, the construction conditions of the track beams are reduced, and the on-beam transporting device is suitable for the working conditions of construction or long construction lines in cities.

In order to achieve the purpose, the invention adopts the technical scheme that:

the beam-on-beam transporting device suitable for the double-line magnetic floating track beam comprises two track beams, a connecting device and a walking track, wherein the walking track is erected between the two track beams through the connecting device, the walking track is parallel to the track beams, and the walking track is used for transporting beam vehicles to pass through.

The walking track can provide a transportation path of a beam transporting vehicle, provides transportation conditions of the rail beams to be installed, realizes beam transportation on the laid rail beams, does not need to plan the passing conditions of heavy-load and ultra-long vehicles along a rail line, replaces the use of the heavy-load and ultra-long vehicles, reduces the occupied area of construction, reduces the construction conditions of the rail beams, is suitable for the working condition of construction or long construction line in cities, and compared with the method that the walking track is directly laid on the rail beams, the walking track is laid between two rail beams, the track gauge of the walking track is not limited by the size of the rail beams, the track gauge of the walking track can be enlarged, and the walking requirements of different beam transporting devices are met.

Preferably, the track gauge of the walking track is larger than the width of the beam body of a single track beam. The two rows of the walking tracks are adaptive to two rows of wheels of a common beam transporting vehicle, so that the normal operation of the beam transporting vehicle is ensured, the width of the beam body of the conventional double-line medium-low speed magnetic levitation track beam is smaller than that of the track beam of a conventional railway, and the width of the beam body of the magnetic levitation track beam is only 1.3m generally, so that the common beam transporting vehicle is difficult to directly pass on the track beam, and the walking tracks can provide a track gauge suitable for the wheel gauge of the on-site common beam transporting vehicle by utilizing the space between the double-line track beams, thereby being convenient for the installation and application of the common beam transporting vehicle.

Preferably, the connecting device comprises a cross beam, two ends of the cross beam are respectively fixed on two rail beams, the cross beams are arranged at intervals along the extending direction of the rail beams, and the walking rail is fixed above the cross beam.

It is a plurality of the crossbeam provides walk orbital mounting platform walks, just the crossbeam can guarantee the joint strength between the double-line track roof beam in the construction of fortune roof beam, strengthens the wholeness between the track roof beam, and then improves the stability of fortune roof beam, it passes through to walk the track the crossbeam is laid two pin between the track roof beam, has guaranteed that the fortune roof beam car is in walk can follow on the track walk the extending direction of track roof beam removes, and then makes the fortune roof beam car just accomplish the transportation of waiting to install the track roof beam on the track roof beam, through the crossbeam is as connecting device, simple structure can save construction material, control construction cost.

Preferably, the connecting device comprises a cross beam and a longitudinal beam, two ends of the cross beam are respectively fixed on the two track beams, the cross beams are arranged at intervals along the extending direction of the track beams, the longitudinal beam is fixed above the cross beams along the extending direction of the track beams, and the walking track is fixed above the longitudinal beam.

The longitudinal beam is arranged between the cross beam and the walking track, so that the supporting area of the walking track can be increased, the weight of a carried heavy object can be increased, or the beam spacing of the cross beam can be reduced; when the weight of the beam transporting vehicle is larger, the walking track is prevented from deforming among the plurality of cross beams.

Preferably, an embedded sleeve which is arranged on the track beam and used for installing the F-shaped rail cushion block is used as an installation hole of the cross beam, and the cross beam is fixedly connected with the embedded sleeve through a fastener. Patent CN213804658U discloses a magnetic levitation track supporting device, which replaces the application of track panels, saves materials, is convenient to adjust, and can be well popularized and applied in the construction of a magnetic levitation track beam, when the track beam is applied to the supporting device, a plurality of embedded sleeves are arranged on the upper surface of the track beam at intervals along the driving direction, so as to facilitate the installation of F-shaped track pads at the later stage of construction; this application is then be equipped with in advance on the track roof beam on the basis of pre-buried sleeve, made further optimization improvement to the technical scheme of this application, promptly laying during the construction of track roof beam, make full use of be equipped with in advance on the track roof beam pre-buried sleeve is right the crossbeam is fixed, very convenient utilization existing fixed knot structure, need not additionally punch on the track roof beam and install, has simplified fixed operation, has saved the engineering time, the track roof beam is laid and is accomplished the back, will the recovery is dismantled to the crossbeam, pre-buried sleeve still can be used to install F rail cushion, can not influence existing pre-buried sleeve's function, the fastener can be that bolt, steel wire or various centre gripping fasteners are right the crossbeam fastens.

Preferably, the embedded sleeves are arranged in a plurality of rows at intervals along the extending direction of the track beam, and each row of the embedded sleeves is fixed with the cross beam. The crossbeam can be according to existing the position of pre-buried sleeve is installed one by one, then the crossbeam with pre-buried sleeve one-to-one sets up, the interval of crossbeam all is confirmed according to pre-buried sleeve's position, make full use of is existing the pre-buried sleeve is installed, has greatly saved the engineering time.

Preferably, the cross beam comprises a fixed section, a transition section and a bearing section, the fixed section serves as two ends of the cross beam and is fixed with the embedded sleeves, the bearing section serves as the middle of the cross beam and is used for supporting the walking track, the transition section is connected with the fixed section and the bearing section, and the web height of the bearing section is greater than that of the fixed section. According to stress analysis, the bearing section can directly bear the pressure transmitted by the walking track, so that the bearing section can generate larger deflection relative to the transition section and the fixed section, the height of the bearing section structure is increased, the capability of the bearing section for bearing vertical load is further improved, and the cross beam is designed in a segmented manner, so that the stress of the cross beam is more reasonable, the stress conditions of different positions of the cross beam can be adapted, the use requirement of the cross beam is met, meanwhile, the material investment of the cross beam is saved, and the reduced weight is easier to transport.

Preferably, the crossbeam still is equipped with the reinforcing plate, the reinforcing plate welding is in the both sides of crossbeam web, the reinforcing plate sets up the fixed section with the junction of embedded sleeve and walk the below of moving the track. The connection part of the cross beam and the embedded sleeve and the part below the walking track, corresponding to the cross beam, have larger local stress, and the reinforcing plate is additionally arranged to increase the strength of a local structure.

Preferably, the running rail is fixed to the connecting device by a fastener system. The structure of the fastener system is convenient for the walking track to be installed and fixed on the connecting device, and meanwhile, the installation position of the walking track can be finely adjusted, so that the operation is flexible, the fault tolerance rate of installation and construction is improved, the installation difficulty of the walking track is reduced, the fastener system is also convenient for removing the fixation of the walking track, and is convenient for detaching the walking track, so that the walking track can be recycled. Of course, the running rails may also be fixed to the connecting device by other means, such as welding.

Preferably, the connecting device is H-shaped steel or channel steel. H shaped steel stable in structure, two planes that have can be regarded as respectively and connect face and holding surface, the channel-section steel also can form stable holding surface through the combination of self, just H shaped steel or the channel-section steel is easily obtained, saves materials, has controlled construction cost.

The girder erection method of the girder on-girder transportation device suitable for the double-line magnetic floating track girder comprises the following steps:

A. completing the assembly of the bridge girder erection machine, wherein the bridge girder erection machine is in place in a span of a beam to be erected;

B. the beam transporting vehicle transports the rail beam to be installed to the lower part of the bridge girder erection machine, the bridge girder erection machine lifts the beam, and the left and right line rail beams are erected and adjusted in place;

C. mounting a cross beam between the erected track beams by using a beam lifting trolley of the bridge girder erection machine;

D. a girder lifting trolley of the bridge girder erection machine is utilized, and a longitudinal beam and a traveling rail are arranged on a cross beam;

E. completing the installation, fixation and inspection of the beam conveying device on the beam;

F. moving the bridge girder erection machine to the next span position;

G. the beam transporting vehicle transports the next span rail beam to be installed to the installation end through the beam transporting device on the beam, and the bridge girder erection machine hoists and erects the rail beam to be installed;

H. repeating the step C to the step G until the installation of the track beam in one area is completed;

I. and C, starting to install the track beams of the next area, and repeating the steps C to H until all the track beams are installed.

The mounting end is the tail end of the mounted track beam in the extending direction along the track beam; the method for erecting the track beam by the beam-on-beam conveying device does not need to plan the passing conditions of heavy-load and overlong vehicles along a running track line to finish the transportation of the track beam to be installed, and replaces the use of the heavy-load and overlong vehicles, thereby reducing the occupied area of construction, reducing the construction conditions of the track beam, and being suitable for the working conditions of construction in cities or the working conditions of long construction lines.

The track beam to be installed is hoisted to the position to be laid from the beam transporting vehicle by using the bridge girder erection machine, the track beam to be installed is transported by the beam transporting vehicle, then the installation end is provided with no need of using a crane to hoist the track beam to be installed from the ground, after the beam transporting vehicle moves to the installation end, the track beam to be installed is hoisted to the position to be laid of one of the two track beams from the middle of the two track beams by using the bridge girder erection machine, the laying construction of the continuous connection of the track beams is completed, and further, the installation end is not required to be provided with the crane, so that the occupied area of the crane is reduced, and the construction condition of the track beam is reduced.

Preferably, in step I, the transverse beams, longitudinal beams and running rails on the completed section rail beam are disassembled and used for mounting the beam conveying device on the next section beam. The double-line track beam is divided into a plurality of areas for construction, according to the development of a construction process, the installed walking track, the longitudinal beam and the cross beam can be detached from the track beam area where the beam transporting vehicle does not need to walk, the beam transporting device on the beam in the next area is used for installing, the walking track, the longitudinal beam and the cross beam are all recycled, the construction materials are fully recycled, the cost input of the construction materials is controlled, the detachable arrangement of the cross beam, the longitudinal beam and the walking track is flexible in construction, and the construction cost can be saved due to recycling.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the beam-on-beam conveying device, the conveying path of the beam-conveying vehicle can be provided on the track beam, so that the conveying condition of the track beam to be installed is provided, the beam is conveyed on the laid track beam, the conditions of heavy load and passage of ultra-long vehicles do not need to be planned along a track line, and the use of the heavy load and ultra-long vehicles is replaced, so that the occupied area of construction is reduced, the construction condition of the track beam is reduced, and the beam-on-beam conveying device is suitable for the working condition of construction or long construction line in cities; compared with the method that the walking track is directly laid on the track beams and laid between two track beams, the method has the advantages that the track gauge of the walking track is not limited by the size of the track beams, and the track gauge of the walking track can be enlarged, so that the method is suitable for walking requirements of different beam transporting devices;

2. the beam is fixed by using the existing embedded sleeve, the existing fixing structure is fully utilized, additional punching and installing bolts on the track beam are not needed, after the beam is disassembled and recovered, the existing embedded sleeve can still be used for installing the F-shaped track cushion block, the original function of the embedded sleeve is not influenced, the fixing operation is simplified, and the installation and the construction are convenient;

3. by using the fastener system, the mounting position of the walking rail can be finely adjusted, the operation is flexible, the fault tolerance rate of mounting construction is improved, and the mounting difficulty of the walking rail is reduced;

4. the embedded sleeves and the fastener system are used for fixing, so that the cross beam and the walking rail can be disassembled and recycled, the construction is flexible, and the construction cost is saved;

5. by means of the sectional design of the cross beam, the stress of the cross beam is more reasonable, the stress conditions of different positions of the cross beam can be adapted, the use requirements of the cross beam are met, meanwhile, the material investment of the cross beam is saved, and the reduced weight is easier to transport;

6. the method for erecting the track beam by the beam-on-beam conveying device does not need to plan the passing conditions of heavy-load and ultra-long vehicles along a walking track line, replaces the use of the heavy-load and ultra-long vehicles, and also reduces the installation of a crane, thereby reducing the floor area of construction, reducing the construction conditions of the track beam, and being suitable for the working conditions of construction or long construction lines in cities.

Drawings

Fig. 1 is a schematic structural diagram of an on-beam conveying device suitable for a double-line magnetic floating track beam in embodiment 1;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic structural view of a single track beam according to embodiment 1;

FIG. 4 is a schematic view of the structure of the mounting end of the track beam according to embodiment 1;

FIG. 5 is a schematic structural diagram of a laid track beam to be installed according to embodiment 1;

FIG. 6 is a schematic diagram of FIG. 5 looping through step C to step B;

FIG. 7 is a schematic force diagram of the steel rail of example 1;

FIG. 8 is a model diagram of a steel rail according to example 1;

FIG. 9 is a force diagram of the steel rail model of example 1;

FIG. 10 is a stress diagram of the rail model of example 1;

FIG. 11 is a schematic view of the stress of the H-shaped steel according to example 1;

FIG. 12 is a stress diagram of the H-shaped steel pattern according to example 1;

FIG. 13 is a reaction force diagram of the H-shaped steel model according to example 1;

FIG. 14 is a force diagram of the rail beam according to example 1;

FIG. 15 is a stress diagram of the rail beam model described in example 1;

FIG. 16 is a schematic structural view of a cross member according to embodiment 2;

FIG. 17 is a top view of FIG. 16;

FIG. 18 is a schematic view showing the installation of the cross member according to embodiment 2;

FIG. 19 is a cross-sectional view taken at A-A of FIG. 16;

FIG. 20 is a cross-sectional view taken at B-B of FIG. 16;

FIG. 21 is a stress diagram of the beam model described in example 2;

FIG. 22 is a reaction force diagram of the beam model according to example 2;

the labels in the figure are: the method comprises the following steps of 1-track beam, 2-cross beam, 21-fixed section, 22-transition section, 23-bearing section, 3-running track, 4-fastener system, 5-embedded sleeve, 6-longitudinal beam and 7-reinforcing plate.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.

Example 1

As shown in fig. 1-2, the beam-on-beam transportation device suitable for the double-line magnetic floating rail beam comprises two rail beams 1, a connecting device and a walking rail 3, wherein the walking rail 3 is erected between the two rail beams 1 through the connecting device, the walking rail 3 is parallel to the rail beams 1, and the walking rail 3 is used for a beam-transporting vehicle to pass through.

In this embodiment, two track beams 1 are parallel to each other, as shown in fig. 3, patent CN213804658U discloses a magnetic levitation track supporting device for the track beams 1, a single track beam 1 is correspondingly spaced with a plurality of rows of embedded sleeves 5, each row includes two groups of embedded sleeves 5, each group is provided with four embedded sleeves 5, and the positions of the four embedded sleeves 5 are exactly used as four vertices of a rectangle; the multi-row embedded sleeves 5 of the two track beams 1 are arranged oppositely, the connecting device comprises cross beams 2, longitudinal beams 6 and a walking track 3, the cross beams 2 are arranged at intervals along the extending direction of the track beams 1, and the longitudinal beams 6 are fixed above the cross beams 2 along the extending direction of the track beams 1;

the transverse beams 2 are made of HW250x250 profile steel, the transverse beams 2 are placed on the upper surfaces of two rail beams 1, two ends of each transverse beam 2 are respectively fixed through single-row pre-embedded sleeves 5 on the two rail beams 1, namely two ends of each transverse beam 2 are fixed with eight pre-embedded sleeves 5, the transverse beams 2 are vertically fixed between the two rail beams 1, one transverse beam 2 is fixed on each row of pre-embedded sleeves 5 which are oppositely arranged on the two rail beams 1, and in the extending direction of the rail beams 1, the distance between every two adjacent transverse beams 2 is corresponding to the distance d between every two adjacent rows of pre-embedded sleeves 5 on the corresponding single rail beam 1; the bolts are selected for use as the fasteners for fixing the cross beam 2, and the bolts are connected so as to facilitate the disassembly of the cross beam, so that the cross beam can be recycled and is convenient to install and construct.

The walking rails 3 are used for the beam transporting vehicle to pass through, the walking rails 3 are made of 60 steel rails according to a railway standard, two rows of the walking rails 3 are arranged, the distance between the two rows of the walking rails 3 is 1.435m and is adaptive to the wheel distance of the on-site beam transporting vehicle, the longitudinal beams 6 are made of square steel, the adaptive walking rails 3 are arranged in two rows, meanwhile, the distance between the adaptive walking rails 3 is welded and fixed on the upper surface of the cross beams 2, the fastener systems 4 are fixed on the upper surface of the longitudinal beams 6, and the walking rails 3 are fixed above the longitudinal beams 6 through the fastener systems 4.

A beam erecting method suitable for an on-beam conveying device of a double-line magnetic floating track beam 1 comprises the following steps:

A. completing the assembly of the bridge girder erection machine, wherein the bridge girder erection machine is in place in a span of a beam to be erected;

B. the beam transporting vehicle transports the rail beam to be installed to the lower part of the bridge girder erection machine, the bridge girder erection machine lifts the beam, and the left and right line rail beams are erected and adjusted in place;

C. a beam 2 is arranged between the erected track beams 1 by using a beam lifting trolley of the bridge girder erection machine;

D. a girder lifting trolley of the bridge girder erection machine is utilized, and a longitudinal beam 6 and a traveling rail 3 are arranged on a cross beam 2;

E. completing the installation, fixation and inspection of the beam conveying device on the beam;

F. moving the bridge girder erection machine to the next span position;

G. the beam transporting vehicle transports the next span rail beam to be installed to the installation end through the beam transporting device on the beam, and the bridge girder erection machine hoists and erects the rail beam to be installed;

H. repeating the step C to the step G until the installation of the track beam in one area is completed;

I. and C, starting to install the track beams of the next area, and repeating the steps C to H until all the track beams are installed.

The bridge girder erection machine is assembled, a girder transport vehicle is used for transporting the track girder to be installed, two track girders 1 are erected at the starting end, the starting end is just the initial laying position of the track girders 1, the starting end can also change the position along the extending direction of the installed track girders 1 along the advancing of the construction process, as shown in figure 4, the installation of the beam-on-beam transportation device is further completed on the laid track beam 1, then the bridge girder erection machine moves to the installation end of the track beam 1, the installation end is the position where the track beam to be installed can be hoisted and provided on the installed track beam 1, the track beam to be installed is transported by the installed beam-on-beam transportation device by using a beam transport vehicle, as shown in figure 5, after the beam transporting vehicle transports the rail beam to be installed to the installation end of the rail beam 1 on the laid running rail, at the moment, the rail beam to be installed is positioned between two paved rail beams 1, and a bridge girder erection machine is used for hoisting the rail beam to be installed from a girder transport vehicle to the tail end of the rail beam 1 to be spliced;

as shown in fig. 6, when two track beams 1 are connected with a section of track beam to be installed, the beam lifting trolley of the bridge girder erection machine is used for continuously and fixedly installing a cross beam 2, a longitudinal beam 6 and a walking track 3 on the newly-laid track beam 1, so that the beam-on-beam transportation device extends along with the installation process of the track beam 1, and the laying of the track beam 1 and the extension of the beam-on-beam transportation device are repeated until the construction of the track beam 1 in the current area is completed.

For the design of the beam conveying device on the beam in the embodiment, the strength checking calculation is correspondingly carried out:

the data for modeling settings include: the total length of the track beam 1 is 31.2m, the self weight is 180t, the distance between two track beams 1 is 4.4m, and the beam body width of the track beam 1 is 1.3 m; the beam 2 is made of HW250x250 profile steel, the length is 5.7m, and the arrangement distance along the driving direction is 1.2 m; the traveling track 3 adopts two standard railway 60 steel rails with the dead weight of 60kg/m and the track gauge of 143.5cm, and is transversely, centrally and symmetrically arranged; the beam transporting vehicle is customized and has the self weight of 50 t.

1. Checking of running rails 3

The steel rail directly bears the load of the beam transporting vehicle and the track beam to be installed, the stress model can be simplified into a multi-span continuous beam structure, the length of a single span is 1.2m, the stress sketch is shown in figure 7,

(1) line conditions are as follows:

designing the traveling speed: 5 km/h;

minimum flat curve radius: 500 m;

(2) steel rail:

the yield strength of a standard rail with the length of 25m and the yield strength of 405Mpa is 60kg/m, and the safety coefficient K of the rail is 1.3;

(3) and (3) load calculation:

static load: the wheel axle load PJ acts on the steel rail symmetrically, and the value is 7.2 t;

transverse load: the static load is 0.8 times, is 26kN, and acts on the axle;

temperature stress: looking up a table to obtain 51 Mpa;

(4) computing

The results obtained by establishing the Midas model are shown in FIGS. 8-10, and the maximum stress of the section is obtained by solving the maximum stress of 61.8Mpa +51 Mpa-112.8 Mpa-405 Mpa-1.3-311 Mpa, which meets the requirement.

2. Checking of the beam 2

Two ends of the H-shaped steel are fixed on the built beam through bolts to bear the load transmitted by the steel rail, and a calculation sketch is shown in FIG. 11;

as can be seen from the reaction diagram of the steel rail in fig. 9, the maximum vertical load transmitted from the self-propelled rail 3 is 63.7kN, the maximum lateral load is 31.2kN, the result obtained by establishing the Midas model is shown in fig. 12 and fig. 13, and the maximum stress of the cross section is obtained by solving 125Mpa and 275Mpa/1.3 and 211Mpa, which meets the requirement.

3. Checking of the track Beam 1

The two rail beams 1 are positioned at two sides of the H-shaped steel and bear the load transmitted by the H-shaped steel, and the checking calculation process is considered according to the load distribution on the two rail beams 1.

(1) Longitudinal checking

The load transmitted by the H-shaped steel is distributed relatively small and uniform in the longitudinal direction of the bridge, so that the equi-generation uniform load is 50kN/m according to equi-generation uniform load and combination of the steel rail and the H-shaped steel reactive force diagram.

The designed live load of the original bridge is 25kN/m, and the designed impact coefficient is 2.28, so that the designed load of the bridge is larger than the equivalent load, and the longitudinal checking calculation is not needed.

(2) Transverse checking calculation

The bridge is transversely subjected to shear and torsion loads transmitted by H-shaped steel, 1.2m long transverse frame sections are checked, a stress sketch map is shown in fig. 14, a stress map of the track beam 1 obtained through modeling is shown in fig. 15, and the calculation results are shown in the following table 1:

therefore, the transverse checking calculation meets the requirement.

As shown in fig. 2, both ends of the cross beam 2 are fixed by two sets of embedded sleeves 5, according to the working condition of this embodiment, the anti-tilt calculation of the cross beam 2 is performed, and one end of the cross beam 2 can also be fixed by only one set of embedded sleeves 5, that is, both ends of the cross beam 2 are fixed by four embedded sleeves 5, for example, the cross beam 2 is fixed by only two sets of embedded sleeves 5 inside two track beams 1, so that the length of the cross beam 2 can be correspondingly shortened, the construction material can be saved, and the construction time for fixing the cross beam 2 can be reduced.

In the present embodiment, in consideration of the possibility that the girder transporting vehicle may transport a rail girder having a larger weight, the longitudinal girders 6 are additionally provided, and the support area of the traveling rails 3 is increased to prevent the traveling rails 3 from being deformed, and if the strength of the rail girder 1 transported by the traveling rails 3 is within the range of the checked load or the strength thereof can be enhanced, the traveling rails 3 may be directly fixed to the cross girders 2 as the traveling rails of the girder transporting vehicle without being supported by the longitudinal girders 6.

The track beam 1 can be split into a plurality of laying areas, each laying area is correspondingly provided with a beam storage field, when the construction of one laying area is completed and the construction of the track beam 1 of the next area is started, the cross beam 2, the longitudinal beam 6 and the walking track 3 in the previous area can be disassembled, the fastener system 4 and the bolts can also be disassembled, and after the track beam to be installed is adjusted away from the beam transporting vehicle through the bridge erecting machine, the disassembled cross beam 2, the longitudinal beam 6, the walking track 3, the fastener system 4 and the bolts can be transported to the installation end of the track beam 1 of the next area through the beam transporting vehicle and used for installing the beam transporting device on the beam of the next area.

If the girder transporting vehicle is provided with more than two rows of wheels for moving, the longitudinal beams 6 and the walking rails 3 are also paved with the row number consistent with the wheels in a self-adapting manner, so that the girder transporting vehicle can finish the transportation work; when the cross beam 2 is fixed, one cross beam 2 can also be fixed in the extending direction of the track beam 1 at intervals of one or more embedded sleeves 5, that is, in the extending direction of the track beam 1, the distance between two adjacent cross beams 2 is the distance between three or more corresponding embedded sleeves 5; the cross beam 2 can also be fixed in the embedded sleeve 5 through other fasteners such as clamping fasteners, the cross beam 2 and the longitudinal beam 6 can also be laid by section bars such as channel steel or steel plates, the walking track 3 can also be fixed on the longitudinal beam 6 or the cross beam 2 only through welding, and further the cost input of the fastener system 4 is not required to be increased.

After the laying construction of the track beam 1 in one area is completed, the laid walking track 3 and the fastener system 4 can be recycled in the next area or the subsequent engineering construction after being disassembled, and the construction efficiency and the construction benefit are improved.

Example 2

Different from the embodiment 1, as shown in fig. 16 to 17, the beam 2 is divided into a fixed section 21, a transition section 22 and a bearing section 23, which are all made of Q345 b-grade steel, the fixed section 21 is used as two ends of the beam 2 and fixedly connected with the embedded sleeve 5, the bearing section 23 is used as the middle part of the beam 2, the traveling rail 3 is directly fixed above the bearing section 23, the transition section 22 is used for smoothly connecting the fixed section 21 and the bearing section 23, each section is fixed by welding to form a beam 2, the bearing section 23 and the fixed section 21 are all i-steel, the web height of the bearing section 23 can meet the requirement of bearing the vertical load brought by the traveling rail 3, the deflection generated by the fixed section 21 is smaller than that of the bearing section 23, and the web height of the corresponding fixed section 21 is smaller than that of the bearing section 23; as shown in fig. 18 to 20, reinforcing plates 7 are respectively arranged at the connection part of the fixed section 21 and the embedded sleeve 5 and in the corresponding bearing section 23 below the running rail, and the reinforcing plates 7 are fixedly welded between the flange plates of the fixed section 21 and the bearing section 23.

Because only to crossbeam 2 carried out segmentation design and reinforcing plate 7's setting, track roof beam 1 does not change with the intensity calculation of walking track 3 result, has carried out the intensity calculation to crossbeam 2 correspondingly:

the beam 2 is made of Q345 b-grade steel, the length is 5.7m, the arrangement distance along the driving direction is 1.2m, compared with the embodiment 1, only the height design of the beam 2 is changed, and the reinforcing plate 7 is introduced, other parameters are not changed, so that two ends of the beam 2 are fixed on the built beam through bolts to bear the load transmitted by the steel rail, the calculation diagram is the same as the embodiment 1, and the reaction force diagram of the steel rail is correspondingly the same as the embodiment 1;

therefore, the maximum vertical load transmitted from the self-propelled track 3 is 63.7kN, the maximum transverse load is 31.2kN, the results obtained by establishing a Midas model are shown in fig. 21 and fig. 22, the maximum stress of the section is obtained by solving, wherein the maximum stress is not less than 101Mpa and not more than σ c, and the maximum deflection is 211Mpa, and the maximum deflection is 1.3mm, so that the requirements are met.

It can be seen from the stress diagram and the reaction diagram of the beam 2 that after the beam 2 is designed in sections, the stress concentration is obviously improved, the maximum value of the stress and the reaction is correspondingly reduced, and the stress of the beam 2 is more reasonable.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.