A cantilever segmental pouring scaffolding system

Abstract

The utility model provides a kind of cantilever beam segment pouring gallows system, set in the beam segment that has been poured and the beam segment to be poured, at least including bailey beam, formwork, jack, bailey beam is fixed on the beam segment that has been poured and extends to the top of the beam segment to be poured, formwork is located the bottom of the beam segment to be poured;Bottom longitudinal beam is evenly distributed multiple roots along longitudinal direction, set in the bottom of formwork, support formwork;Crossbeam includes front upper crossbeam, front lower crossbeam, rear upper crossbeam and rear lower crossbeam;Anchor beam includes upper anchor beam and lower anchor beam, set in the top of the beam segment that has been poured;The jack is provided with multiple, distributes in the top of front upper crossbeam, rear upper crossbeam and upper anchor beam;Cushion beam and jack quantity correspond;Suspender is evenly distributed in the top of front lower crossbeam, rear lower crossbeam and lower anchor beam.The utility model structure system is simple, force is clear, safe and reliable, material is saved, erects simple, and application scope is wide.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a cantilever beam segment casting support system. Background Technology

[0002] A cantilever bridge segment mainly refers to a beam segment in a cantilever bridge structure where one end is fixed to a pier or abutment, while the other end extends freely outward. Segment construction of bridges often employs the scaffolding method. Depending on the bridge's structural form and construction requirements, an appropriate type of scaffolding is selected, such as full-span scaffolding or Bailey bridges. Construction procedures, including scaffolding erection, prestressing, formwork installation, rebar tying, concrete pouring, and curing, are carried out according to design and specification requirements.

[0003] Preloading of the support frame can eliminate inelastic deformation, obtain the elastic and inelastic deformation amounts, provide a basis for setting the pre-camber of the box girder bottom formwork, ensure construction stability and safety, accelerate construction progress, and save time and labor costs. Common methods include water bag preloading, preloading block preloading, and jack preloading. The jack preloading method selects suitable counter-pressure component materials such as steel sections, fabricates a reaction frame according to the stress requirements, and applies tension using prestressed precision-rolled threads, performing graded preloading according to the proportion of the box girder's self-weight. However, when the pier height is large and the surrounding geological conditions are poor, the support frame design is difficult, and foundation treatment is challenging. Furthermore, the existing cast-in-place support frame construction and dismantling requires a long time and a large amount of materials and equipment, resulting in high construction costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a cantilever beam segment casting support system. Its structure is simple, the stress is clearly defined, it is safe and reliable, it saves materials, it is easy to erect, it has a wide range of applications, it is not limited by the surrounding geology, and it can meet the needs of most projects for efficient and economical cantilever segment construction at present.

[0005] The technical solution adopted to achieve the above-mentioned objectives of this utility model is as follows: A cantilever beam segment casting support system is provided, installed on both a cast-in-place beam segment and a beam segment to be cast, and includes at least a Bailey beam, formwork, and jacks. The Bailey beam is fixed to the cast-in-place beam segment and extends above the beam segment to be cast, the formwork is located at the bottom of the beam segment to be cast, and further includes: Multiple bottom longitudinal beams are evenly distributed along the longitudinal direction and are set below the formwork to support it. The crossbeams include the front upper crossbeam, the front lower crossbeam, the rear upper crossbeam, and the rear lower crossbeam. The front upper crossbeam and the front lower crossbeam are located at the front end of the beam segment to be poured and their positions correspond vertically. The rear upper crossbeam and the rear lower crossbeam are located at the front end of the already poured beam segment and their positions correspond vertically. The front lower crossbeam and the rear lower crossbeam are both horizontally positioned below the bottom longitudinal beam, the front upper crossbeam is horizontally positioned above the Bailey beam, and the rear upper crossbeam is horizontally positioned above the already poured beam segment. Anchor beams, including upper anchor beams and lower anchor beams, are set above the cast-in-place beam segment. Multiple sets are evenly arranged, with the lower anchor beam located below the Bailey beam and on the top surface of the cast-in-place beam segment, and the upper anchor beam located above the Bailey beam. The two are positioned vertically corresponding to each other. Multiple jacks are provided and distributed above the front upper crossbeam, the rear upper crossbeam, and the upper anchor beam; The support beams, corresponding to the number of jacks, are placed above and below the jacks. The hangers are evenly distributed above the front lower crossbeam, the rear lower crossbeam, and the lower anchor beam. The bottom of the hangers is anchored to the front lower crossbeam, the rear lower crossbeam, and the already poured beam segment, respectively. The top of the hangers passes through the front upper crossbeam, the rear upper crossbeam, and the upper anchor beam, and further extends to the pad beam above the jack and is anchored to the pad beam.

[0006] Furthermore, the template is provided with passageways around its perimeter.

[0007] Furthermore, the pedestrian passage includes a passage beam, a passage panel, a kick plate, and a guardrail. The passage panel is placed on the upper part of the passage beam, guardrails are installed on both sides of the passage beam, and a kick plate is installed at the junction of the lower part of the guardrail and the passage panel.

[0008] Furthermore, a ladder is provided between the pedestrian passage and the Bailey beam.

[0009] Furthermore, a concrete leveling layer is provided between the upper rear crossbeam and the lower anchor beam and the top surface of the already poured beam segment.

[0010] Furthermore, anchor bolts are provided at both the top and bottom of the boom, and the boom is anchored by the anchor bolts.

[0011] Compared with the prior art, the technical solution provided by this utility model has the following advantages: After the suspension system of this utility model is assembled, it can be used with jacks to conduct simulated static load tests according to specifications to determine the stress condition of the Bailey beams and the connection strength and deformation value of the Bailey beams under maximum load, so as to eliminate inelastic deformation and set accurate pre-lift values. Its structural system is simple, the stress is clear, it is safe and reliable, it saves materials, and it is easy to assemble. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the present invention. Figure 1 ; Figure 3 This is a cross-sectional schematic diagram of the present invention. Figure 2 ; Figure 4 This is a cross-sectional schematic diagram of the present invention. Figure 3 ; Figure 5 This is a detailed structural drawing of the pedestrian passage of this utility model; In the diagram: 11. Cast-in-place beam segment, 12. Beam segment to be cast, 20. Bailey beam, 21A. Front upper crossbeam, 21B. Front lower crossbeam, 22A. Rear upper crossbeam, 22B. Rear lower crossbeam, 23A. Upper anchor beam, 23B. Lower anchor beam, 24. Pad beam, 25. Jack, 26. Anchor bolt, 27. Bottom longitudinal beam, 28. Hanger rod, 29. Concrete leveling layer, 3. Formwork, 4. Pedestrian walkway, 41. Walkway beam, 42. Walkway panel, 43. Skirting board, 44. Guardrail, 5. Ladder. Detailed Implementation

[0013] The technical solution of this utility model patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] This embodiment provides a cantilever beam segment casting support system, the overall structure of which is as follows: Figure 1 and Figure 4 As shown, the entire system is set on the already poured beam segment 11 and the beam segment 12 to be poured. The Bailey beam 20 is fixed on the already poured beam segment 11 and extends above the beam segment 12 to be poured. The formwork 3 is located at the bottom of the beam segment 12 to be poured, and multiple bottom longitudinal beams 27 are evenly distributed along the longitudinal direction and set below the formwork 3 to support it. Since the next beam segment needs to be poured through the formwork, a simulated static load test is required on the entire system, especially the Bailey beams, before the pouring construction to determine the stress condition of the Bailey beams and the connection strength and deformation value of the Bailey beams under the maximum load, in order to eliminate inelastic deformation.

[0015] The crossbeams include a front upper crossbeam 21A, a front lower crossbeam 21B, a rear upper crossbeam 22A, and a rear lower crossbeam 22B. (See reference) Figure 2The front upper crossbeam 21A and the front lower crossbeam 21B are located at the front end of the beam segment 12 to be poured, and their positions are vertically corresponding. The front lower crossbeam 21B is horizontally positioned below the bottom longitudinal beam 27, and the front upper crossbeam 21A is horizontally positioned above the Bailey beam 20. Jacks 25 are distributed above the front upper crossbeam 21A, and pad beams 24 are positioned above and below the jacks 25. The bottom of the lifting rod 28 is anchored to the front lower crossbeam 21B by anchor bolts 26, and the top of the lifting rod 28 passes through the front upper crossbeam 21A and extends further to the pad beam 24 above the jacks 25 before being anchored to the pad beam 24.

[0016] Reference Figure 3 The upper rear crossbeam 22A and the lower rear crossbeam 22B are located at the front end of the cast-in-place beam segment 11, and their positions correspond vertically. The lower rear crossbeam 22B is positioned laterally below the bottom longitudinal beam 27, and the upper rear crossbeam 22A is positioned laterally above the cast-in-place beam segment. A concrete leveling layer 29 is provided between the upper rear crossbeam 22A and the top surface of the cast-in-place beam segment. Jacks 25 are distributed above the upper rear crossbeam 22A, and pad beams 24 are positioned above and below the jacks. The bottom of the lifting rod is anchored to the lower rear crossbeam 22B by anchor bolts 26, and the top of the lifting rod passes through the upper rear crossbeam and extends further to the pad beam above the jacks, where it is anchored.

[0017] Reference Figure 4 The anchor beams include an upper anchor beam 23A and a lower anchor beam 23B, which are set above the cast-in-place beam segment 11. Multiple sets are evenly arranged. The lower anchor beam 23B is located below the Bailey beam 20 and on the top surface of the cast-in-place beam segment 11. A concrete leveling layer 29 is provided between the lower anchor beam 23B and the top surface of the cast-in-place beam segment 11. The upper anchor beam 23A is located above the Bailey beam 20, and the two are positioned vertically. Jacks are distributed above the upper anchor beam 23A. Pad beams are set above and below the jacks. The bottom of the lifting rod is anchored to the bottom surface of the cast-in-place beam segment by anchor bolts. The top of the lifting rod passes through the lower anchor beam 23B and the upper anchor beam 23A, and extends further to the pad beam above the jacks before being anchored to the pad beam.

[0018] Passenger passages 4 are provided around the perimeter of template 3. The structure of the passenger passages 4 is as follows: Figure 5 As shown, the passageway includes a walkway beam 41, a walkway panel 42, a kick plate 43, and a guardrail 44. The walkway panel 42 is placed on the upper part of the walkway beam 41, and guardrails 44 are installed on both sides of the walkway beam 41. A kick plate 43 is installed at the lower part of the guardrail 44 where it meets the walkway panel 42. A ladder 5 is installed between the pedestrian passageway 4 and the Bailey beam 20.

[0019] In this embodiment, after the hanger system is assembled, a simulated static load test is conducted using jacks according to specifications to determine the stress condition of the Bailey beams and the connection strength and deformation value of the Bailey beams under maximum load, in order to eliminate inelastic deformation. Then, after the anchor nuts are tightened, the jacks and pad beams are removed to ensure that the jacks are not stressed during concrete pouring. Finally, the rebar tying, concrete pouring, and curing processes are carried out.

[0020] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A cantilever beam segment casting support system, installed on both a cast-in-place beam segment and a beam segment to be cast, comprising at least a Bailey beam, formwork, and jacks, wherein the Bailey beam is fixed to the cast-in-place beam segment and extends above the beam segment to be cast, and the formwork is located at the bottom of the beam segment to be cast, characterized in that, Also includes: Multiple bottom longitudinal beams are evenly distributed along the longitudinal direction and are set below the formwork to support it. The crossbeams include the front upper crossbeam, the front lower crossbeam, the rear upper crossbeam, and the rear lower crossbeam. The front upper crossbeam and the front lower crossbeam are located at the front end of the beam segment to be poured and their positions correspond vertically. The rear upper crossbeam and the rear lower crossbeam are located at the front end of the already poured beam segment and their positions correspond vertically. The front lower crossbeam and the rear lower crossbeam are both horizontally positioned below the bottom longitudinal beam, the front upper crossbeam is horizontally positioned above the Bailey beam, and the rear upper crossbeam is horizontally positioned above the already poured beam segment. Anchor beams, including upper anchor beams and lower anchor beams, are set above the cast-in-place beam segment. Multiple sets are evenly arranged, with the lower anchor beam located below the Bailey beam and on the top surface of the cast-in-place beam segment, and the upper anchor beam located above the Bailey beam. The two are positioned vertically corresponding to each other. Multiple jacks are provided and distributed above the front upper crossbeam, the rear upper crossbeam, and the upper anchor beam; The support beams, corresponding to the number of jacks, are placed above and below the jacks. The hangers are evenly distributed above the front lower crossbeam, the rear lower crossbeam, and the lower anchor beam. The bottom of the hangers is anchored to the front lower crossbeam, the rear lower crossbeam, and the already poured beam segment, respectively. The top of the hangers passes through the front upper crossbeam, the rear upper crossbeam, and the upper anchor beam, and further extends to the pad beam above the jack and is anchored to the pad beam.

2. A cantilever segmental pour hanger system according to claim 1, wherein: The template has passageways around its perimeter.

3. A cantilever segmental pour hanger system according to claim 2, wherein: The pedestrian passage includes a passage beam, a passage panel, a kickboard, and a guardrail. The passage panel is placed on the upper part of the passage beam, and guardrails are installed on both sides of the passage beam. A kickboard is installed at the junction of the lower part of the guardrail and the passage panel.

4. A cantilever segmental pour hanger system according to claim 2, wherein: A ladder is provided between the pedestrian passage and the Bailey beam.

5. A cantilever segmental pour hanger system according to claim 1, wherein: Both the upper rear crossbeam and the lower anchor beam have a concrete leveling layer between them and the top surface of the already poured beam segment.

6. A cantilever segmental pour hanger system according to claim 1, wherein: Anchor bolts are provided at both the top and bottom of the boom, and the boom is anchored by the anchor bolts.

Images