Operation device for splicing construction of existing double-width bridge

Abstract

The utility model discloses an operation device for splicing construction of an existing double-width bridge. The operation device comprises a supporting structure, an operation platform and a connecting structure. The supporting structure comprises a large support erected on top plates of the left box girder and the right box girder, two small supports welded to the bottom faces of the two ends of the large support in a one-to-one correspondence mode, and two sets of pulleys installed on the bottom faces of the two small supports in a one-to-one correspondence mode. The operation platform is located between webs on the opposite sides of the left box girder and the right box girder and is a rectangular box with an upward box opening. The connecting structure comprises two connecting frames which are connected between the middle parts of the front end and the rear end of the large bracket and the middle parts of the front end and the rear end of the action platform in a one-to-one correspondence manner; one connecting frame further comprises a crawling ladder which is connected between the middle part of the front end of the large bracket and the middle part of the front end of the action platform; the utility model has the characteristics of easy disassembly and assembly, no support, and no influence on the traffic below.

Description

Technical Field

[0001] The utility model relates to a working device for the splicing construction of an existing double - span bridge. Background Technique

[0002] With the rapid development of China's social economy, the road network traffic volume increases year by year, which makes it difficult for a large number of early - built road bridges to meet the current traffic operation requirements. Therefore, more and more reconstruction and expansion projects have emerged. Under such conditions, it is necessary to widen (broaden) and reinforce the bridge on the original basis, that is, on the basis of ensuring the safe operation of the bridge, effectively utilize the structure of the original bridge, so that the widened (broadened) bridge meets the existing technical specifications and also meets the existing functional requirements.

[0003] When reconstructing and splicing an existing double - span cast - in - place box girder, the construction working platform plays a key role. When splicing a double - span bridge, since the splicing part is suspended, although it is feasible to use a scaffold for high - altitude bridge splicing construction, there are many drawbacks. First of all, the process of erecting and dismantling the scaffold is cumbersome and time - consuming, and in high - altitude operations, its stability and load - bearing capacity face severe tests, increasing the construction risk. Once the scaffold loosens or collapses, it not only threatens the lives of construction workers, but also may cause inestimable damage to the traffic facilities, pedestrians and vehicles below the bridge. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a working device for the splicing construction of an existing double - span bridge, which has the characteristics of being easy to disassemble and assemble, eliminating the need for building a support, and not affecting the lower - level traffic.

[0005] The purpose of the utility model is realized as follows: A working device for the splicing construction of an existing double - span bridge, the existing double - span bridge includes a left - hand box girder and a right - hand box girder; the working device includes a support structure, a working platform and a connection structure; among them,

[0006] The support structure includes a large support, two small supports and two groups of pulleys; the large support includes a large rectangular frame composed of two cross - bars and two longitudinal bars and having a length greater than the width of the splicing surface of the left - hand box girder and the right - hand box girder, and several connecting rods longitudinally bridging between the two cross - bars; the small support is a small rectangular frame with the same width as the large rectangular frame, and the two small supports are welded to the bottom surfaces of the two ends of the large support respectively; the two groups of pulleys are installed on the bottom surfaces of the two small supports respectively, so that the large support can longitudinally slide on the top plates of the left - hand box girder and the right - hand box girder through the two groups of pulleys.

[0007] The working platform is located between the webs on the opposite sides of the left and right box girders. The working platform is a rectangular box with the opening facing upwards. The width of the working platform is adapted to the width of the large support, and the length of the working platform is less than the distance between the opposite webs of the left and right box girders.

[0008] The connecting structure includes two connecting frames; each connecting frame includes two long columns connected between the middle of a long side of the working platform and the middle of a cross bar of the large support, an upper cross beam column connected between the upper parts of the two long columns, a lower cross beam connected between the lower parts of the two columns, several upper columns connected between the upper cross beam and a cross bar of the large support, and several lower columns connected between the lower cross beam and a long side of the working platform; the distance between the two long columns is less than the width of the splicing surface of the left and right box girders, so that the connecting frame is located between the splicing sides of the left and right box girders; one of the connecting frames further includes a ladder connected between the middle of the upper cross beam and the middle of the lower cross beam.

[0009] In the above-mentioned working device for the splicing construction of an existing double-span bridge, the large support covers half of the area of the small support.

[0010] In the above-mentioned working device for the splicing construction of an existing double-span bridge, each group of pulleys is four pulleys respectively installed on the bottom surfaces of the four corners of the small support.

[0011] In the above-mentioned working device for the splicing construction of an existing double-span bridge, the working platform includes a box-shaped frame welded by square pipes and iron sheets covering the outer sides and the bottom of the box-shaped frame.

[0012] The characteristics of the working device for the splicing construction of an existing double-span bridge of the present utility model are:

[0013] 1. The support structure, the connecting structure and the working platform are connected by high-strength bolts, which are convenient for erection and disassembly, saving construction time;

[0014] 2. The support structure can move freely longitudinally under the action of pulleys, eliminating the need to build scaffolds, improving construction efficiency; the working platform adopts a box structure, which is easy for construction workers to work under the bridge body. At the same time, the box body is wrapped with iron sheets around and at the bottom to prevent falling objects from height;

[0015] 3. The working platform is suspended by the support structure and the connecting structure. Compared with traditional scaffolds, it avoids the impact on the traffic under the bridge body. Description of the Drawings

[0016] Figure 1 is a three-dimensional view of the working device for the splicing construction of an existing double-span bridge of the present utility model;

[0017] Figure 2 is a perspective view of the support structure in the working device of the present utility model;

[0018] Figure 3 is a perspective view of the working platform in the working device of the present utility model;

[0019] Figure 4 is a perspective view of the connection structure in the working device of the present utility model;

[0020] Figure 5 is a perspective view of the working device for the splicing construction of existing double - span bridges of the present utility model during use. Detailed implementation manners

[0021] The present utility model will be further described below in conjunction with the accompanying drawings.

[0022] Please refer to Figures 1 to 5 , for the working device for the splicing construction of existing double - span bridges of the present utility model, the existing double - span bridge box girders include the left - hand box girder 1A and the right - hand box girder 1B; the working platform 2 includes a support structure, a working platform 7 and a connection structure.

[0023] The support structure includes a large bracket 3, two small brackets 4 and two groups of pulleys 5; wherein, the large bracket 3 includes a large rectangular frame composed of two cross bars 31 and two longitudinal bars 32 and having a length greater than the width of the splicing surface of the left - hand box girder 1A and the right - hand box girder 1B, and a number of connecting rods 33 longitudinally bridging between the two cross bars 31 of the large rectangular frame; the small bracket 4 is a small rectangular frame with the same width as the large rectangular frame, and the two small brackets 4 are welded to the bottom surfaces at both ends of the large bracket 3 one by one. When welding, the large bracket 3 covers half of the area of the small bracket 4 to make the support structure more firm; each group of pulleys has four, and the two groups of pulleys 5 are installed at the bottom surfaces of the four corners of the two small brackets 4 one by one, so that the large bracket 3 longitudinally slides on the top plates of the left - hand box girder 1A and the right - hand box girder 1B through the two groups of pulleys 5.

[0024] The working platform 7 is located between the webs on the opposite sides of the left - hand box girder 1A and the right - hand box girder 1B. The working platform 7 is a rectangular box with the box opening facing upwards. The width of the working platform 7 is adapted to the width of the large bracket 5, and the length of the working platform 7 is less than the distance between the opposite - side webs of the left - hand box girder 1 and the right - hand box girder 2; the working platform 7 includes a box - type frame welded by square tubes and iron sheets covering the outer side surfaces and the bottom around the box - type frame.

[0025] The connecting structure includes two connecting frames 6. Each connecting frame 6 includes two long vertical columns 61, an upper cross beam 62, a lower cross beam 63, two upper vertical columns 611 and two lower vertical columns 612. Among them, the lower ends of the two long vertical columns 61 are respectively connected to the middle of a long side 71 of the working platform 7 through high-strength bolts 60, and the upper ends of the two long vertical columns 61 are respectively connected to the middle of a cross bar 31 corresponding to a long side 71 of the working platform 7 on the large bracket 3 through high-strength bolts 60. The distance between the two long vertical columns 61 is less than the width of the splicing surface of the left box girder 1A and the right box girder 1B, so that the connecting frame is located between the splicing sides of the left box girder 1A and the right box girder 1B. The upper cross beam 62 is welded between the upper parts of the two long vertical columns 61. The lower cross beam 63 is welded between the lower parts of the two vertical columns 61. The lower ends of the two upper vertical columns 611 are welded to the middle of the upper cross beam 62, and the upper ends of the two upper vertical columns 611 are respectively connected to a cross bar 31 of the large bracket 3 through high-strength bolts 60. The upper ends of the two lower vertical columns 612 are welded to the middle of the lower cross beam 63, and the lower ends of the two lower vertical columns 612 are respectively connected to a long side 71 on the working platform 7 through high-strength bolts 60. One of the connecting frames 6 further includes a ladder 64 welded between the middle of the upper cross beam 62 and the middle of the lower cross beam 63. The two upper vertical columns 611 make the middle part and the support structure more firmly connected. The two lower vertical columns 612 make the middle part and the working platform 7 more firmly connected.

[0026] For the working device for the splicing construction of existing double - span bridges of the present utility model, the working platform 7 is used to carry construction personnel and construction tools, the support structure is used to support the working platform 7, and the connecting structure is used to connect the support structure and the working platform 7, so that the working platform 7 is suspended above the ground between the webs on the opposite sides of the left box girder 1A and the right box girder 1B and is located below the top plates of the left box girder 1A and the right box girder 1B. During construction, the construction personnel go down to the working platform 7 through the ladder 64 in the connecting structure. After the construction personnel enter the working platform 7, they can carry out the construction of the lower part of the splicing surface of the left box girder 1A and the right box girder 1B. Since the periphery and bottom of the working platform 7 are wrapped with iron sheets, it is prevented that sundries fall from the inside of the working platform 7 during construction and pose a threat to the passing vehicles and pedestrians under the bridge.

[0027] The above embodiments are only for illustrating the present utility model, rather than limiting the present utility model. Those skilled in the relevant technical fields can also make various transformations or variations without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions should also belong to the scope of the present utility model and should be defined by each claim.

Claims

1. An operating device for splicing an existing double-span bridge, wherein the existing double-span bridge comprises a left box girder and a right box girder; the operating device comprises a supporting structure, an operating platform and a connecting structure; characterized in that: The supporting structure comprises a large bracket, two small brackets and two groups of pulleys; the large bracket comprises a large rectangular frame composed of two cross bars and two longitudinal bars and having a length greater than the width of the joint surface of the left box beam and the right box beam, and a plurality of connecting rods longitudinally spanning between the two cross bars; the small bracket is a small rectangular frame with the same width as the large rectangular frame, and the two small brackets are welded one by one on the bottom surfaces of the two ends of the large bracket; the two groups of pulleys are installed one by one on the bottom surfaces of the two small brackets, so that the large bracket slides longitudinally on the top plate of the left box beam and the top plate of the right box beam through the two groups of pulleys; The working platform is located between the webs on the opposite sides of the left box girder and the right box girder. The working platform is a rectangular box with the box opening facing upwards. The width of the working platform is adapted to the width of the large bracket, and the length of the working platform is less than the spacing between the webs on the opposite sides of the left box girder and the right box girder. The connection structure includes two connection frames; each connection frame includes two long columns connected between the middle part of a long side of the working platform and the middle part of a crossbar of the large support, an upper crossbeam connected between the upper parts of the two long columns, a lower crossbeam connected between the lower parts of the two columns, a plurality of upper columns connected between the upper crossbeam and a crossbar of the large support, and a plurality of lower columns connected between the lower crossbeam and a long side of the working platform; the spacing between the two long columns is smaller than the width of the splicing surface of the left box girder and the right box girder, so that the connection frame is located between the splicing sides of the left box girder and the right box girder; one of the connection frames also includes a ladder connected between the middle part of the upper crossbeam and the middle part of the lower crossbeam.

2. The operating device for splicing an existing double-span bridge according to claim 1 is characterized in that: The large bracket covers half the area of ​​the small bracket.

3. The operating device for splicing an existing double-span bridge according to claim 1 is characterized in that: Each group of pulleys consists of four pulleys which are mounted on the bottom surfaces of the four corners of the small bracket in a one-to-one correspondence.

4. The operating device for splicing an existing double-span bridge according to claim 1 is characterized in that: The working platform comprises a box-shaped frame welded from square tubes and iron sheets covering the outer sides and the bottom of the box-shaped frame.

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