Bailey beam supporting system construction method

Abstract

The invention discloses a construction method of a bailey beam supporting system. The construction method comprises the following construction steps that S1, a clamp is installed, specifically, the clamp is installed on a bailey beam when the bailey beam works on an assembling site; s2, integral hoisting: after the fixture and the bailey beam are assembled on the ground, the fixture and the bailey beam are integrally hoisted in place; s3, jacking and supporting are conducted, specifically, a jacking assembly is installed on a movable support of the clamp, and then a clamping base of the jacking assembly extends out of the clamp; s4, box girder bottom die primary and secondary ridge installation: the primary ridge is placed in the clamping seat, and the secondary ridge is placed at the top of the primary ridge; s5, concrete pouring; and S6, dismantling: after construction is finished and the exposed height of the jacking is reduced, the main edge and the secondary edge of the formwork are dismantled immediately, the jacking assembly is taken out, and the clamp is dismantled. The construction speed is high, the efficiency is high, the engineering quality is easy to guarantee, meanwhile, the construction safety can be improved, the adjustable device occupies a small space, and the construction cost is low. On-site construction conditions are easy to meet, adaptability is high, one-time investment cost is low, repeated use can be achieved, and the premise and guarantee are provided for civilized construction, energy conservation, consumption reduction and the like.

Description

Technical Field

[0001] The invention relates to the technical field of bridges, and in particular to a Bailey beam support system construction method. Background Art

[0002] Bridges play an important role in the development of my country's transportation. They are key nodes in the transportation network. They can cross obstacles such as rivers, lakes, and valleys, making transportation routes more coherent and smooth, expanding transportation coverage, and improving transportation efficiency. When encountering complex mountainous terrain, crossing rivers and seas, etc. during bridge construction, the Bailey beam system with easy installation and high strength is often used. At the same time, the disc-type bracket is combined with the adjustable bracket components of the bracket to adjust the pre-camber, slope and elevation of the bridge.

[0003] The combination of Bailey beam + disc support system can not only meet the load requirements of the construction stage, but also better guarantee the various design accuracy requirements. However, when the lower part of the new bridge encounters an existing building structure and the clearance between the two does not meet the installation height of the Bailey beam + disc support system, this support system cannot meet the on-site use requirements. The traditional solution is to use the Bailey beam directly and adjust the height by inserting a steel plate between the Bailey beam and the supported bridge body. This method is difficult to accurately control the support height. At the same time, due to the heavy weight of the supported structure, the construction of the steel plate is large, which is not convenient for on-site construction and requires a lot of manpower and material resources, affecting the construction period.

[0004] At present, the support system method combining Bailey beam and disc support system cannot meet the on-site use requirements when the lower part of the new bridge encounters an existing building and the clearance between the two does not meet the installation height of the Bailey beam and disc support system. The traditional solution is to use the Bailey beam directly and adjust the height by inserting a steel plate between the Bailey beam and the supported bridge body. This method is difficult to accurately control the support height. At the same time, due to the heavy weight of the supported structure, the construction of the inserted steel plate is large, which is not convenient for on-site construction and requires a lot of manpower and material resources, affecting the construction period.

[0005] There is a need for a Bailey beam support system construction method that can support the bridge body with Bailey beams and flexibly adjust the height to achieve accurate control of the height of the supported bridge body, thereby reducing the input of manpower and material resources, saving construction time and costs, and improving construction quality. Summary of the invention

[0006] In view of this, the present invention provides a Bailey beam support system construction method, which can realize the Bailey beam to support the bridge body, and can flexibly adjust the height to achieve accurate control of the height of the supported bridge body, thereby reducing the investment of manpower and material resources, saving construction time and cost, and improving construction quality.

[0007] The Bailey beam support system construction method provided by the present invention adopts the following technical solution:

[0008] A Bailey beam support system construction method comprises the following construction steps:

[0009] S1: Clamp installation: The clamp is installed on the Bailey beam when the Bailey beam is working at the assembly site;

[0010] S2: Overall hoisting: After the fixture and Bailey beam are assembled on the ground, they are hoisted into place together with the Bailey beam;

[0011] S3: Top support: first install the top support assembly on the movable bracket of the fixture, and then extend the clamping seat of the top support assembly out of the fixture;

[0012] S4: Installation of main and secondary ribs of box beam bottom formwork: the main ribs are placed in the clamping seat, and the secondary ribs are placed on the top of the main ribs;

[0013] S5: Concrete pouring;

[0014] S6: Dismantling: After the construction is completed, lower the exposed height of the top support, then remove the main and secondary ribs of the formwork, take out the top support assembly, and remove the clamp.

[0015] Optionally, S31: the height of the clamping seat extending out of the clamp is adjusted up and down by an adjustable device to pre-adjust it to meet the designed longitudinal and transverse slopes, pre-arch and elevation values ​​of the bridge.

[0016] Optional, S41: Installation and pre-stressing of box girder bottom formwork: After the installation of primary and secondary ribs is completed, the box girder bottom formwork is installed, and the support system is pre-stressed according to the design requirements.

[0017] Optional, S42: Fine-tuning of adjustable device: After the pre-stressing of the bottom formwork of the box girder is qualified, the longitudinal and transverse slopes, elevations and pre-arch of the bridge are rechecked, and fine-tuning is performed by adjusting the height of the jacking assembly.

[0018] Optionally, in S1, the fixture includes a fixed seat, a movable support and a top support assembly, the fixed seat has a receiving portion for accommodating the upper chord of the Bailey beam, the bottom of the movable support is arranged on the upper chord of the Bailey beam, the top support assembly is used to support the main rib of the bottom mold, and the top support assembly is arranged on the movable support.

[0019] Optionally, in S1, the fixed seat is provided with a sliding hole in vertical direction and communicated with the accommodating portion, and the movable support has a sliding rod, which is slidably fitted in the sliding hole.

[0020] Optionally, the fixing seat includes an upper clamp, a lower clamp and a connecting plate, the bottom of the upper clamp abuts the top of the lower clamp, the connecting plate is arranged at the abutting position between the upper clamp and the lower clamp, and a positioning piece for fixing the upper clamp and the lower clamp is arranged on the connecting plate, and the positioning piece is fixed to the web of the upper chord of the Bailey beam.

[0021] Optionally, an upper through hole connected to the upper clamp and a lower through hole connected to the lower clamp are formed on the connecting plate, and the positioning member includes an upper bolt and a lower bolt, the upper bolt passes through the upper through hole and is connected to the upper clamp, and the lower bolt passes through the lower through hole and is connected to the lower clamp.

[0022] Optionally, the movable bracket includes a support plate and a bottom plate, the top support assembly is arranged on the support plate, and the bottom plate is arranged at the bottom of the support plate for abutting against the upper chord of the Bailey beam.

[0023] Optionally, the top support assembly includes a clamping seat, a screw and a threaded sleeve, the clamping seat has a clamping portion, the clamping portion is used to clamp the main rib of the bottom mold, the top support assembly also includes a screw and a threaded sleeve, the screw is threadedly connected to the threaded sleeve, the threaded sleeve is arranged on the movable bracket, and the screw is arranged on the clamping seat.

[0024] In summary, the present invention includes at least one of the following beneficial technical effects: the present invention not only has a fast construction speed, high efficiency, and easy to ensure project quality, but also can improve construction safety, the adjustable device occupies a small space, the on-site construction conditions are easy to meet, the adaptability is strong, the one-time investment cost is low, and it can be reused, providing a prerequisite guarantee for civilized construction, energy saving and consumption reduction, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 The overall structure of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 2 The overall structure of the embodiment of the present invention is shown in FIG. Figure 2 .

[0028] Explanation of the accompanying drawings: 1. supporting member; 2. supporting assembly; 3. upper clamp; 4. positioning plate; 5. movable support; 6. lower clamp; 7. positioning member; 8. connecting plate; 9. sliding hole; 10. sliding rod. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] The following is combined with Figure 1-2 The present invention is described in further detail.

[0031] The embodiment of the invention discloses a construction method of a Bailey beam support system.

[0032] Reference Figure 1 , Figure 2 , a Bailey beam support system construction method, comprising the following construction steps:

[0033] S1: Clamp installation: The clamp is installed on the Bailey beam when the Bailey beam is working at the assembly site;

[0034] S2: Overall hoisting: After the fixture and Bailey beam are assembled on the ground, they are hoisted into place together with the Bailey beam;

[0035] S3: Lifting support: first install the lifting component 2 on the movable bracket of the clamp, and then extend the clamping seat of the lifting component 2 out of the clamp;

[0036] S31: The height of the clamping seat extending out of the fixture is adjusted up and down by an adjustable device to pre-adjust it to meet the designed longitudinal and transverse slopes, pre-camber and elevation values ​​of the bridge;

[0037] S4: Installation of main and secondary ribs of box beam bottom formwork: the main ribs are placed in the clamping seat, and the secondary ribs are placed on the top of the main ribs;

[0038] S41: Installation and preloading of box beam bottom formwork: After the installation of primary and secondary ribs is completed, the box beam bottom formwork is installed, and the support system is preloaded according to the design requirements;

[0039] S42: Fine adjustment of adjustable device: after the pre-pressing of the bottom form of the box girder is qualified, the longitudinal and transverse slopes, elevation and pre-camber of the bridge are re-checked, and fine adjustment is performed by adjusting the height of the jacking assembly 2;

[0040] S5: Concrete pouring. Before pouring concrete for bridges, the support system should be inspected and accepted in accordance with the "three inspections" system. For adjustable devices, the focus should be on checking whether the installation position is correct and whether the positioning bolts are leaking or loose. If any problems are found, they should be rectified in a timely manner. During the concrete pouring process, a special person should be assigned to conduct safety inspections and patrols on the formwork support system. If any abnormal situation is found, the system should be stopped immediately and concrete should be poured only after the hidden dangers have been eliminated.

[0041] S6: Dismantling: After the concrete curing period expires, that is, after the construction is completed, the exposed height of the top support assembly 2 is lowered, and then the main and secondary ribs of the formwork are dismantled, the top support assembly 2 is taken out, and the clamp is removed.

[0042] In S1, the clamp includes a fixed seat, a movable support 5 and a top support assembly 2, the fixed seat has a receiving portion for accommodating the upper chord of the Bailey beam, the bottom of the movable support 5 is set on the upper chord of the Bailey beam, the top support assembly 2 is used to support the main rib of the bottom mold, and the top support assembly 2 is set on the movable support 5.

[0043] In S1 , the fixed seat is provided with a sliding hole 9 in vertical direction and communicated with the accommodating portion, and the movable support 5 has a sliding rod 10 , which is slidably fitted in the sliding hole 9 .

[0044] When the Bailey beam is operated at the component assembly site, the clamp can be installed together with the Bailey beam to reduce high-altitude operations and improve safety; according to the main rib position of the frame designed by the formwork support system, the processed upper clamp 3 and lower clamp 6 are installed and fixed at the upper chord position of the Bailey beam through the connecting plate 8, and the four positioning bolts of the clamp are tightened and locked with the web of the upper chord of the Bailey beam to prevent the clamp from shaking.

[0045] Specifically, the clamp includes a fixed seat, a movable support 5 and a top support assembly 2. The fixed seat is installed on the Bailey beam, and the fixed seat has a receiving portion for receiving the upper chord of the Bailey beam. The fixed seat is provided with a sliding hole 9 connected to the receiving portion in the vertical direction. The movable support 5 has a sliding rod 10, and the sliding rod 10 is slidably arranged in the sliding hole 9. The bottom of the movable support 5 is arranged on the upper chord of the Bailey beam. The top support assembly 2 is used to support the main rib of the bottom mold, and the top support assembly 2 is arranged on the movable support 5. Not only is the construction speed fast, the efficiency is high, and the engineering quality is easy to be guaranteed, but also the construction safety can be improved. The adjustable device occupies a small space, the on-site construction conditions are easy to meet, the adaptability is strong, the one-time investment cost is low, and it can be reused, which provides a prerequisite guarantee for civilized construction, energy saving and consumption reduction, etc.

[0046] The fixing seat includes an upper clamp 3, a lower clamp 6 and a connecting plate 8, and the bottom of the upper clamp 3 is abutted against the top of the lower clamp 6. The upper clamp 3 is welded and processed with a 16mm thick steel plate; a φ50mm round hole is set on the top of the upper clamp 3, and the inner sleeve is supported; two φ16mm positioning bolt holes are set on the left and right sides of the upper clamp 3, with a spacing of 60mm; a 30*10mm strip hole is opened on the left and right sides of the upper clamp to form a sliding hole 9, and the strip hole is used for the sliding rod 10 of the movable support 5 to pass through, so that the upper clamp 3 and the movable support 5 are assembled into a whole, and the sliding rod 10 is slidably matched in the horizontal direction and set in the sliding hole 9 and the movable bracket. The lower clamp 6 is welded and processed with a 16mm thick steel plate, and two φ16mm positioning bolt holes are set on the left and right sides of the lower clamp 6, with a spacing of 60mm. The lower clamp 6 is combined with the upper clamp 3 through the connecting plate 8 to form a whole, and the upper clamp 3 and the lower clamp 6 are installed to form a receiving part for accommodating the upper chord of the Bailey beam.

[0047] The connecting plate 8 is arranged at the abutting position of the upper clamp 3 and the lower clamp 6, and the connecting plate 8 is provided with a positioning member 7 for fixing the upper clamp 3 and the lower clamp 6. The positioning member 7 is fixed to the web of the upper chord of the Bailey beam, and the connecting plate 8 is provided with an upper through hole connected to the upper clamp 3 and a lower through hole connected to the lower clamp 6. The positioning member 7 includes an upper bolt and a lower bolt, the upper bolt passes through the upper through hole and is connected to the upper clamp 3, and the lower bolt passes through the lower through hole and is connected to the lower clamp 6. The connecting plate 8 is made of 10mm steel plate, and two connecting plates 8 are respectively arranged on the left and right sides of the fixing seat, each connecting plate 8 is provided with an upper through hole and a lower through hole arranged in the vertical direction, and the above two through holes are φ20mm bolt holes with a center spacing of 60mm; the connecting plate 8 and the positioning member 7 are used to connect the upper and lower clamps into an integral fixing seat, and at the same time facilitate the removal of the adjustable device, and the bolts are pressed against the web of the upper chord steel of the Bailey beam to play a role in positioning and fixing the adjustment device.

[0048] The movable bracket includes a support plate and a base plate. The top support assembly 2 is arranged on the support plate. The base plate is arranged at the bottom of the support plate for contacting with the upper chord of the Bailey beam. Since the movable bracket is arranged in the fixed seat by sliding in the vertical direction through the sliding rod 10, the sliding rod 10 is driven to slide and adjust the position of the movable bracket relative to the fixed seat after the base contacts with the upper chord of the Bailey beam, so as to adapt to the upper chords of the Bailey beam of different heights, and the applicability is high.

[0049] The top support assembly 2 includes a clamping seat, a screw and a threaded sleeve. The clamping seat has a clamping portion, which is used to clamp the main rib of the bottom mold. The screw is threadedly connected to the threaded sleeve, the threaded sleeve is arranged on the movable bracket, and the screw is arranged on the clamping seat. The clamping seat has a clamping portion, which is used to clamp the main rib of the bottom mold. This design ensures a stable connection between the top support assembly 2 and the main rib of the bottom mold to prevent loosening or displacement during the construction process. The stable clamping connection helps to improve the stability of the entire support system and ensure safety during the construction process. The screw is connected to the threaded sleeve by a thread. This design allows the screw to rotate freely in the threaded sleeve and move axially, thereby realizing the height adjustment of the main rib of the bottom mold and improving applicability. The design of the top support assembly 2 makes its installation and disassembly process relatively simple and quick, which helps to shorten the construction period.

[0050] The invention has a simple structure, low one-time towing cost, can be used in a turnover manner, improves the utilization rate of construction resources, and effectively reduces construction waste on the construction site. The device is completed and manufactured in a processing plant and has almost no impact on the surrounding environment; it reduces the amount of steel used in technical measures, greatly reduces social energy consumption, promotes the development of green buildings, and meets the needs of building a low-carbon, environmentally friendly society.

[0051] When the Bailey beam is operated at the component assembly site, the component of the present invention can be installed together with the Bailey beam to reduce high-altitude operations and improve safety; according to the main rib position of the frame designed by the template support system, the processed upper clamp 3 and lower clamp 6 are installed and fixed at the upper chord position of the Bailey beam through the connecting plate 8, and the four positioning bolts of the clamp are tightened and locked with the web of the upper chord of the Bailey beam to prevent the clamp from shaking. After the upper clamp 3 and the lower clamp 6 are assembled with the Bailey beam on the ground, they are hoisted into place as a whole with the Bailey beam, and then the main rib of the bottom mold is placed in the clamping seat.

[0052] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can also make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A Bailey beam support system construction method, characterized in that: The construction steps include: S1: Clamp installation: The clamp is installed on the Bailey beam when the Bailey beam is working at the assembly site; S2: Overall hoisting: After the fixture and Bailey beam are assembled on the ground, they are hoisted into place together with the Bailey beam; S3: Top support: first install the top support assembly on the movable bracket of the fixture, and then extend the clamping seat of the top support assembly out of the fixture; S4: Installation of main and secondary ribs of box beam bottom formwork: the main ribs are placed in the clamping seat, and the secondary ribs are placed on the top of the main ribs; S5: Concrete pouring; S6: Dismantling: After the construction is completed, lower the exposed height of the top support assembly, then dismantle the main and secondary ribs of the formwork, take out the top support assembly, and remove the clamp.

2. The Bailey beam support system construction method according to claim 1, characterized in that: S31: The height of the clamping seat extending out of the clamp is adjusted up and down by an adjustable device to pre-adjust it to meet the designed longitudinal and transverse slopes, pre-camber and elevation values ​​of the bridge.

3. The Bailey beam support system construction method according to claim 1, characterized in that: S41: Installation and pre-stressing of box girder bottom formwork: After the installation of primary and secondary ribs is completed, the box girder bottom formwork is installed, and the support system is pre-stressed according to the design requirements.

4. The Bailey beam support system construction method according to claim 3, characterized in that: S42: Fine-tuning of adjustable device: After the pre-stressing of the bottom formwork of the box girder is qualified, the longitudinal and transverse slopes, elevations and pre-arch of the bridge are rechecked, and fine-tuning is performed by adjusting the height of the top support assembly.

5. The Bailey beam support system construction method according to claim 4, characterized in that: In S1, the fixture includes a fixed seat, a movable support and a top support assembly, the fixed seat has a receiving portion for accommodating the upper chord of the Bailey beam, the bottom of the movable support is arranged on the upper chord of the Bailey beam, the top support assembly is used to support the main rib of the bottom mold, and the top support assembly is arranged on the movable support.

6. The Bailey beam support system construction method according to claim 5, characterized in that: In S1, the fixed seat is provided with a sliding hole in vertical direction and communicated with the accommodating portion, and the movable support has a sliding rod, which is slidably fitted in the sliding hole.

7. The Bailey beam support system construction method according to claim 5, characterized in that: The fixing seat includes an upper clamp, a lower clamp and a connecting plate. The bottom of the upper clamp abuts the top of the lower clamp. The connecting plate is arranged at the abutting position between the upper clamp and the lower clamp. A positioning piece for fixing the upper clamp and the lower clamp is arranged on the connecting plate. The positioning piece is fixed to the web of the upper chord of the Bailey beam.

8. The Bailey beam support system construction method according to claim 7, characterized in that: The connecting plate is provided with an upper through hole connected to the upper clamp and a lower through hole connected to the lower clamp. The positioning member includes an upper bolt and a lower bolt. The upper bolt passes through the upper through hole and is connected to the upper clamp, and the lower bolt passes through the lower through hole and is connected to the lower clamp.

9. The Bailey beam support system construction method according to claim 5, characterized in that: The movable bracket comprises a supporting plate and a bottom plate. The top supporting assembly is arranged on the supporting plate, and the bottom plate is arranged at the bottom of the supporting plate for abutting against the upper chord of the Bailey beam.

10. The Bailey beam support system construction method according to claim 5, characterized in that: The top supporting assembly includes a clamping seat, a screw and a threaded sleeve. The clamping seat has a clamping part, which is used to clamp the main rib of the bottom mold. The top supporting assembly also includes a screw and a threaded sleeve. The screw is threadedly connected to the threaded sleeve, the threaded sleeve is arranged on the movable bracket, and the screw is arranged on the clamping seat.

Images