Continuous rigid frame truss structure and construction method thereof

Abstract

The application provides a continuous rigid frame bracket structure and a construction method thereof. One end of a platform cross beam is connected with one end of a support bracket, and the other end of the platform cross beam and the other end of the support bracket are connected with embedded parts in a pier column to form a triangular support structure. A plurality of triangular support structures are arranged in a circle around the pier column and are connected through steel structures to form a bracket support structure. An operation platform is arranged outside the plurality of triangular support structures, and a formwork is arranged inside the plurality of triangular support structures, and the formwork is used for pouring a beam body. The bracket support structure does not need conventional welding, improves work efficiency, reduces construction period, reduces technical difficulty, and increases safety guarantee. In addition, the bracket support structure is cheap to disassemble in the later period, is suitable for bracket construction at an ultrahigh position, and guarantees the safety, firmness and reliability of the bracket.

Description

Technical Field

[0001] This invention relates to the field of bridges, and in particular to a continuous rigid frame bracket structure and its construction method. Background Technology

[0002] In the construction of high-pier prestressed continuous beam bridges, the 0# block, as the starting segment for cantilever casting with hanging baskets, is characterized by its large concrete volume and weight, and generally high pier height. It is often constructed using the bracket method, which presents significant challenges and risks. A good bracket design for the 0# block should meet the necessary strength, stiffness, and stability requirements for construction, have a simple structure, and clearly define the stress distribution. Simultaneously, it must consider the operational difficulties during bracket installation to ensure convenient installation and dismantling, accelerate construction speed, and improve overall efficiency.

[0003] Conventional high-altitude triangular brackets are difficult to position, and the rigid connections at the joints will bear huge bending moments, requiring special reinforcement of the joints. However, the height of the piers is relatively high, and the positioning and reinforcement measures of the brackets will increase the risks and difficulties of construction and delay the construction progress.

[0004] During the pouring of prestressed continuous beam bridges with high piers, significant vibrations are generated. These vibrations can damage the stability of the high-altitude triangular brackets, causing deformation and resulting in gaps at the bottom of the cast formwork and errors in the accuracy of the poured shape. Currently, beam bridges require the use of tower cranes during formwork separation, which is difficult. Therefore, there is an urgent need for a simple, efficient, convenient, and safe method for positioning and installing triangular brackets. Summary of the Invention

[0005] The main objective of this invention is to provide a continuous rigid frame bracket structure and its construction method, which solves the problems of construction safety and progress being restricted by the difficulty in positioning conventional brackets, excessive bending moments at nodes, and the need for a large amount of manpower and large machinery to cooperate during installation and dismantling.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a continuous rigid frame bracket structure, wherein one end of the platform beam is connected to one end of the support bracket, and the other end of the platform beam and the other end of the support bracket are connected to the embedded parts inside the pier column to form a triangular support structure. Multiple triangular support structures are set around the pier column and connected by steel structure to form a bracket support structure. An operating platform is set on the outer ring of the multiple triangular support structures, and a template is set on the inner ring. The template is used for casting the beam.

[0007] In the preferred embodiment, the support structure of the bracket at the top of the pier is provided with side templates on both sides. The lower end of the side template is hinged to the operating platform, and the lower end of the inner surface of the side template is sealed and snapped to the platform beam. The lower end of the inner surface abuts against the surface of the pier.

[0008] In the preferred embodiment, multiple platform beams are provided with demolding support beams at their ends. The demolding support beams are inclined and connected to the ends of the platform beams in the middle by a cable-stayed bridge. The ends of the demolding support beams are provided with guide wheels.

[0009] In the preferred embodiment, a dual-shaft winch is provided on one side of the bottom of the pier column. The dual-shaft winch is connected to the top of the side formwork by passing the guide wheel at the end of the demolding support beam through the demolding cable.

[0010] The twin-shaft winch pulls the side templates on both sides to separate the mold using two demolding cables.

[0011] In the preferred embodiment, a buffer is also provided in the middle of the demolding support beam, and the end surface of the telescopic rod of the buffer is in contact with the outer surface of the side template after demolding.

[0012] A spring is fitted onto the telescopic rod of the buffer.

[0013] In the preferred embodiment, a shock-absorbing cylinder is provided between the platform crossbeam and the support bracket. The end of the telescopic rod of the shock-absorbing cylinder is hinged to the platform crossbeam, and the other end of the cylinder body is hinged to the support bracket.

[0014] In the preferred embodiment, bottom formwork frames are provided at both ends of the support structure at the top of the pier column. The bottom of the bottom formwork frames is set on multiple longitudinal connecting beams. The lower surface of the connecting beams is connected to the upper surface of the support structure through at least two height adjustment devices.

[0015] In the preferred embodiment, the height adjustment device includes an upper top plate and a lower bottom plate that are connected vertically. The folding plates on both sides of the lower bottom plate are slidably connected to the folding plates on both sides of the upper top plate. A connecting compartment is provided between the upper top plate and the lower bottom plate, and sliding blocks are provided in the holes at both ends of the connecting compartment.

[0016] The sliding block is equipped with an adjustment plate at its end. The upper and lower ends of the adjustment plate extend beyond the upper and lower surfaces of the sliding block. Both adjustment plates are equipped with bent pads at their upper and lower ends. The two ends of the bent protruding surfaces of the pads abut against the ends of the adjustment plates.

[0017] The screw passes through two sliding blocks, and nuts are provided at both ends of the screw. Rotating the nuts causes the sliding blocks to slide against each other inside the connecting chamber, and the relative movement of the adjusting plate squeezes the two pads to expand outward.

[0018] A guide block is provided in the middle of the bent protrusion of the plate, and guide grooves that match the guide block are provided on the upper and lower surfaces of the connecting compartment. The guide block and the guide groove are slidably connected up and down.

[0019] The upper and lower adjustment plates rest against the inner surfaces of the upper top plate and the lower bottom plate, respectively.

[0020] In the preferred embodiment, multiple pre-embedded threaded steel bars at the bottom and top are embedded through the inside of the pier column;

[0021] The bottom and top pre-embedded threaded steel bars have recessed slots at their ends;

[0022] Both the platform beam and the support bracket are equipped with mounting blocks at their ends. The mounting blocks are inserted into the slots and the platform beam and the support bracket are locked to the pier by bolts and pre-embedded threaded steel.

[0023] The method includes:

[0024] S1. Multiple threaded steel bars are pre-embedded during the casting of the pier column, and slots are pre-embedded at the ends of the threaded steel bars;

[0025] S2. Assemble the platform beams and support brackets according to the design drawings. Install the assembled platform beams and support brackets on the four sides of the top of the pier. Strengthen the structure of the support brackets with reinforcing beams. Install I-beams on the top of the platform beams to assemble them into a platform. Assemble the operating platform on the platform surface.

[0026] S3. First, install the side formwork on the platform beam. The bottom of the side formwork is assembled with the platform beam by hinge. Reinforcing bars and inner formwork are laid inside the side formwork. After installation, tie bars are used to tighten and fix the two side formwork.

[0027] S4. After the beam is poured, first remove the interlocking steel bars, then install two demolding support beams on the side platform beam. After the demolding support beams are fixed in position, install a buffer in the middle of the demolding support beams. The top of the side formwork is connected to the dual-shaft winch by passing the pulley at the end of the demolding support beam through the demolding cable. The two shafts of the dual-shaft winch are connected to the top of the two side formworks. The dual-shaft winch pulls down the two side formworks to start the demolding process.

[0028] S5. The side formwork rotates outward under the action of the twin-shaft winch, is buffered onto the platform beam by the buffer, and then the tower crane is used to disassemble and lift the side formwork away.

[0029] S6. The end face of the pier is also covered with formwork. The bottom of the end face formwork is connected to the bottom formwork frame. The bottom formwork frame is set on the platform beam of the end face of the pier. The bottom formwork frame is adjusted in height and the end face formwork is laid through the height adjustment equipment.

[0030] S7. By rotating the nut, the two adjusting plates move relative to each other. The adjusting plates push the two pads, and the two pads push the upper top plate and the lower bottom plate. The upper top plate and the lower bottom plate push the supporting connecting beam to rise or fall, thus completing the height adjustment of the bottom formwork frame. The bottom formwork frame supports and pours the cantilever side of the beam end face.

[0031] S8. After the beam end face is poured, start dismantling the end formwork and bottom formwork frame. Adjust the height adjustment equipment to retract, and the bottom formwork frame falls down under the action of gravity to separate the formwork.

[0032] S9. After the side formwork and end formwork are installed, when pouring the beam, install shock-absorbing cylinders between the platform crossbeam and the support bracket. Multiple shock-absorbing cylinders play a shock-absorbing role to prevent the entire platform from vibrating and damaging the pier.

[0033] This invention provides a continuous rigid frame bracket structure and its construction method. The operating platform and platform beam are connected by shock-absorbing cylinders, achieving a vibration filtering effect. This is equivalent to adding resistance between the operating platform and the platform beam, compensating for and filtering minor vibrations. The connection is hinged, directly offsetting the large bending moment at this point. Horizontal and diagonal bracing members are directly connected using node boxes, all with pin hinges, and none bear bending moment. Installation and dismantling are simple and quick, ensuring the bracket's safety and reliability while reducing construction difficulty, increasing work efficiency, reducing operation time, and improving safety. A dual-shaft winch and demolding cables are used for formwork separation, resulting in high separation efficiency and good safety, reducing worker workload. This improves work efficiency, shortens the construction period, reduces technical difficulty, and increases safety. Furthermore, subsequent dismantling is inexpensive, making it suitable for bracket construction at extremely high locations while ensuring the bracket's safety, stability, and reliability. Attached Figure Description

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0035] Figure 1 This is the main structural view of the beam-pier structure of the present invention;

[0036] Figure 2 This is a side view of the beam-pier structure of the present invention;

[0037] Figure 3 This is a front view of the bracket structure of the present invention;

[0038] Figure 4 This is a side view of the bracket structure of the present invention.

[0039] Figure 5 This is a structural diagram of the demolding support beam of the present invention;

[0040] Figure 6 This is a diagram of the side template parting structure of the present invention;

[0041] Figure 7 This is a structural diagram showing the installation position of the height adjustment device of the present invention;

[0042] Figure 8 This is an overall structural diagram of the height adjustment device of the present invention;

[0043] Figure 9 This is a disassembled structural diagram of the height adjustment device of the present invention;

[0044] Figure 10 This is a side sectional view of the height adjustment device of the present invention;

[0045] Figure 11 This is a top view of the crossbeam installation structure of the platform of this invention;

[0046] Figure 12 This is a diagram of the pre-embedded structure of the mounting block and slot of the present invention.

[0047] In the diagram: 1. Beam; 2. Pier; 3. Side formwork; 4. Operating platform; 5. Platform crossbeam; 6. Support bracket; 7. Shock-absorbing cylinder; 8. Bottom embedded threaded steel; 9. Top embedded threaded steel; 10. Bottom formwork frame; 11. Support connecting beam; 12. Height adjustment device; 1201. Upper top plate; 1202. Lower bottom plate; 1203. Nut; 1204. Screw; 1205. Adjusting plate; 1206. Sliding block; 1207. Pad; 1208. Guide block; 1209. Connecting compartment; 1210. Guide groove; 13. Reinforcing beam; 14. Demolding cable; 15. Buffer; 16. Demolding support beam; 17. Cable tie; 18. Dual-shaft winch; 19. Installation plug; 20. Slot. Detailed Implementation

[0048] Example 1

[0049] like Figures 1-12 As shown, a continuous rigid frame bracket structure is presented. One end of the platform beam 5 is connected to one end of the support bracket 6. The other end of the platform beam 5 and the other end of the support bracket 6 are connected to the embedded parts inside the pier column 2 to form a triangular support structure. Multiple triangular support structures are set around the pier column 2 and connected by steel structures to form the bracket support structure. An operating platform 4 is set on the outer ring of the multiple triangular support structures, and a template is set on the inner ring. The template is used for pouring the beam body 1. The operating platform 4 and the platform beam 5 are connected by a shock-absorbing cylinder 7, which plays a role in filtering vibration. It is equivalent to adding resistance between the operating platform 4 and the platform beam 5. Small vibrations are compensated and filtered by the shock-absorbing cylinder 7. The connection is hinged, and the huge bending moment at this point is directly offset. The horizontal members and diagonal braces are directly connected by node boxes. The connection is all pin hinges, which do not bear bending moment and are easy and quick to install and dismantle. This not only ensures the safety and reliability of the bracket, but also reduces the construction difficulty and increases the work efficiency.

[0050] In the preferred embodiment, side formwork 3 is provided on both sides of the top bracket support structure of pier 2. The lower end of the side formwork 3 is hinged to the operating platform 4, and the lower end of the inner surface of the side formwork 3 is sealed and snapped into the platform crossbeam 5, with the lower end of the inner surface abutting against the surface of pier 2. The hinged connection between the lower end of the side formwork 3 and the operating platform 4 facilitates the rotation and demolding of the side formwork 3.

[0051] In the preferred embodiment, each end of multiple platform beams 5 is provided with a demolding support beam 16. The demolding support beam 16 is inclined, and its middle part is connected to the end of the platform beam 5 via a cable-stayed bridge 17. The end of the demolding support beam 16 is provided with a guide wheel. Figure 5-6 As shown in the structure, the demolding support beam 16 mainly serves to guide the demolding cable 14 and bear the load of the side formwork 3.

[0052] In the preferred embodiment, a dual-shaft winch 18 is provided on one side of the bottom of the pier 2. The dual-shaft winch 18 is connected to the top of the side formwork 3 via a demolding cable 14 that passes over the guide wheel at the end of the demolding support beam 16; for example... Figure 5-6 As shown in the structure, the dual-shaft winch 18 pulls the side templates 3 on both sides to separate the mold through two demolding cables 14.

[0053] In the preferred embodiment, a buffer 15 is also provided in the middle of the demolding support beam 16. The end surface of the telescopic rod of the buffer 15 is in contact with the outer surface of the side template 3 after demolding. The side template 3 abuts against the buffer 15, and the buffering effect of the side template 3 increases the safety of demolding.

[0054] A spring is fitted onto the telescopic rod of the buffer 15. The spring provides a mechanical cushioning effect.

[0055] In the preferred embodiment, a shock-absorbing cylinder 7 is installed between the platform beam 5 and the support bracket 6. The end of the telescopic rod of the shock-absorbing cylinder 7 is hinged to the platform beam 5, and the other end of the cylinder body is hinged to the support bracket 6. The connection between the operating platform 4 and the platform beam 5 using the shock-absorbing cylinder 7 achieves a vibration filtering effect, essentially adding resistance between them. Minor vibrations are compensated and filtered by the shock-absorbing cylinder 7. The hinged connection directly cancels out the large bending moment at this point. Horizontal and diagonal bracing members are directly connected using node boxes, with pin-hinged connections that do not bear bending moments. Installation and disassembly are simple and quick, ensuring the safety and reliability of the bracket while reducing construction difficulty and increasing work efficiency.

[0056] In the preferred embodiment, bottom formwork frames 10 are provided at both ends of the top bracket support structure of pier 2. The bottom of the bottom formwork frames 10 is set on multiple longitudinal connecting beams 11. The lower surface of the connecting beams 11 is connected to the upper surface of the bracket support structure through at least two height adjustment devices 12.

[0057] In the preferred embodiment, the height adjustment device 12 includes an upper top plate 1201 and a lower bottom plate 1202 that are connected vertically. The folding plates on both sides of the lower bottom plate 1202 are slidably connected to the folding plates on both sides of the upper top plate 1201. A connecting compartment 1209 is provided between the upper top plate 1201 and the lower bottom plate 1202. Sliding blocks 1206 are provided in the holes at both ends of the connecting compartment 1209.

[0058] The sliding block 1206 has an adjusting plate 1205 at its end. The upper and lower ends of the adjusting plate 1205 extend out of the upper and lower surfaces of the sliding block 1206. Both ends of the adjusting plate 1205 have a bent pad 1207 at their upper and lower ends. The two ends of the bent protrusion of the pad 1207 abut against the ends of the adjusting plate 1205.

[0059] The screw 1204 passes through two sliding blocks 1206. Nuts 1203 are provided at both ends of the screw 1204. Rotating the nuts 1203 causes the sliding blocks 1206 to slide against each other inside the connecting chamber 1209. The adjusting plate 1205 moves relative to each other, pressing the two pads 1207 to expand outward.

[0060] A guide block 1208 is provided in the middle of the bent protrusion of the plate 1207, and a guide groove 1210 is provided on the upper and lower surfaces of the connecting compartment 1209 to cooperate with the guide block 1208. The guide block 1208 and the guide groove 1210 are slidably connected up and down.

[0061] The upper and lower adjustment plates 1205 are respectively abutted against the inner surfaces of the upper top plate 1201 and the lower bottom plate 1202.

[0062] By rotating the nut 1203, the two adjusting plates 1205 are pushed to move relative to each other. The adjusting plates 1205 push the two pads 1207, and the two pads 1207 push the upper top plate 1201 and the lower bottom plate 1202. The upper top plate 1201 and the lower bottom plate 1202 push the supporting connecting beam 11 to rise or fall, thus completing the height adjustment of the bottom formwork frame 10. The bottom formwork frame 10 supports and pours the cantilever side of the beam body 1 end face.

[0063] After the end face of beam 1 is poured, the end formwork and bottom formwork frame 10 are dismantled. The height adjustment device 12 is adjusted to retract, and the bottom formwork frame 10 falls down under the action of gravity to separate the formwork.

[0064] In the preferred embodiment, multiple pre-embedded threaded steel bars 8 at the bottom and pre-embedded threaded steel bars 9 at the top are embedded inside the pier column 2.

[0065] The bottom pre-embedded threaded steel bar 8 and the top pre-embedded threaded steel bar 9 have recessed slots 20 at their ends;

[0066] Both the platform beam 5 and the support bracket 6 are equipped with mounting blocks 19 at their ends. The mounting blocks 19 are inserted into the slots 20, and the platform beam 5 and the support bracket 6 are locked to the pier 2 by bolts and pre-embedded threaded steel. The pre-embedded parts include multiple precision-rolled threaded steel bars that run through the pier body and are fixed by nuts and washers. The pre-embedded parts are welded from several steel plates, and the principle is similar to a "drawer". The pre-embedded "drawer box" is used in advance, and the pre-embedded parts are installed by pulling them out directly. The pre-embedded parts are connected to the horizontal and diagonal bracing members by pins, which is quick to install. Since the connection is hinged, the huge bending moment at this point is directly offset. The horizontal and diagonal bracing members are directly connected by node boxes, and the connection is all pin hinged. They do not bear bending moment and are easy and quick to install and remove. This not only ensures the safety and reliability of the bracket, but also reduces the construction difficulty, increases work efficiency, reduces working time, and improves safety.

[0067] Example 2

[0068] Further explanation in conjunction with Example 1, such as Figure 1-12 As shown in the structure, multiple threaded steel bars are pre-embedded during the pouring of the pier column 2, and slots 20 are pre-embedded at the ends of the threaded steel bars.

[0069] Assemble the platform beam 5 and support bracket 6 according to the design drawings. Install the assembled platform beam 5 and support bracket 6 on the four sides of the top of the pier 2. Strengthen the structure of the support bracket 6 by reinforcing beam 13. Install I-beams on the top of the platform beam 5 to assemble it into a platform. Assemble the operating platform 4 on the platform surface.

[0070] First, install the side formwork 3 on the platform beam 5. The bottom of the side formwork 3 is assembled with the platform beam 5 by hinge. The side formwork 3 is filled with steel bars and inner formwork. After installation, the two side formwork 3 are tightened and fixed by interlocking steel bars.

[0071] After the beam 1 is poured, the interlocking steel bars are first removed, and two demolding support beams 16 are installed on the side platform beam 5. After the demolding support beams 16 are fixed in position, a buffer 15 is installed in the middle of the demolding support beams 16. The top of the side formwork 3 is connected to the dual-shaft winch 18 by the demolding cable 14 passing around the pulley at the end of the demolding support beam 16. The two shafts of the dual-shaft winch 18 are connected to the top of the two side formworks 3. The dual-shaft winch 18 pulls down the two side formworks 3 to start the demolding.

[0072] The side formwork 3 rotates outward under the action of the twin-shaft winch 18, and is buffered onto the platform beam 5 by the buffer 15. Then, the tower crane is used to disassemble and lift the side formwork 3 away.

[0073] The end face of the pier 2 is also covered with templates. The bottom of the end face template is connected to the bottom template frame 10. The bottom template frame 10 is set on the platform beam of the end face of the pier 2. The bottom template frame 10 is height-adjusted and the end face template is laid through the height adjustment device 12.

[0074] By rotating the nut 1203, the two adjusting plates 1205 are pushed to move relative to each other. The adjusting plates 1205 push the two pads 1207, and the two pads 1207 push the upper top plate 1201 and the lower bottom plate 1202. The upper top plate 1201 and the lower bottom plate 1202 push the supporting connecting beam 11 to rise or fall, thus completing the height adjustment of the bottom formwork frame 10. The bottom formwork frame 10 supports and pours the cantilever side of the beam body 1 end face.

[0075] After the end face of beam 1 is poured, the end formwork and bottom formwork frame 10 are dismantled. The height adjustment device 12 is adjusted to retract, and the bottom formwork frame 10 falls down under the action of gravity to separate the formwork.

[0076] After the side formwork 3 and end formwork are installed, when pouring the beam 1, damping cylinders 7 are installed between the platform crossbeam 5 and the support bracket 6. Multiple damping cylinders 7 play a damping role to prevent the entire platform from vibrating and damaging the pier 2.

[0077] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A continuous rigid frame bracket structure, characterized in that: One end of the platform beam (5) is connected to one end of the support bracket (6), and the other end of the platform beam (5) and the other end of the support bracket (6) are connected to the embedded parts inside the pier (2) to form a triangular support structure. Multiple triangular support structures are set around the pier (2) and connected by steel structure to form a bracket support structure. An operating platform (4) is set on the outer ring of the multiple triangular support structures, and a template is set on the inner ring. The template is used to pour the beam (1). The bottom of the bracket support structure at both ends of the pier (2) is provided with a bottom formwork frame (10). The bottom of the bottom formwork frame (10) is set on multiple longitudinal connecting beams (11). The lower surface of the connecting beams (11) is connected to the upper surface of the bracket support structure through at least two height adjustment devices (12). The height adjustment device (12) includes an upper top plate (1201) and a lower bottom plate (1202) that are connected vertically. The folding plates on both sides of the lower bottom plate (1202) are slidably connected to the folding plates on both sides of the upper top plate (1201). A connecting compartment (1209) is provided between the upper top plate (1201) and the lower bottom plate (1202). Sliding blocks (1206) are provided in the holes at both ends of the connecting compartment (1209). The sliding block (1206) is provided with an adjusting plate (1205) at its end. The upper and lower ends of the adjusting plate (1205) extend out of the upper and lower surfaces of the sliding block (1206). Both the upper and lower ends of the two adjusting plates (1205) are provided with bent pads (1207). The two ends of the bent protruding surface of the pads (1207) abut against the ends of the adjusting plates (1205). The screw (1204) passes through two sliding blocks (1206). Nuts (1203) are provided at both ends of the screw (1204). Rotating the nuts (1203) causes the sliding blocks (1206) to slide against each other inside the connecting chamber (1209). The relative movement of the adjusting plate (1205) squeezes the two pads (1207) to expand outward. A guide block (1208) is provided in the middle of the bent protrusion of the plate (1207), and a guide groove (1210) is provided on the upper and lower surfaces of the connecting compartment (1209) to match the guide block (1208). The guide block (1208) and the guide groove (1210) are slidably connected up and down. The upper and lower adjustment plates (1205) are respectively abutted against the inner surfaces of the upper top plate (1201) and the lower bottom plate (1202); Multiple platform beams (5) are provided with demolding support beams (16) at their ends. The demolding support beams (16) are inclined and connected to the ends of the platform beams (5) in the middle by a cable (17). The ends of the demolding support beams (16) are provided with guide wheels. A dual-shaft winch (18) is provided on one side of the bottom of the pier (2). The dual-shaft winch (18) is connected to the top of the side formwork (3) by passing the guide wheel at the end of the demolding support beam (16) through the demolding cable (14). The twin-shaft winch (18) pulls the side templates (3) on both sides through two demolding cables (14) to separate the mold; A shock-absorbing cylinder (7) is provided between the platform beam (5) and the support bracket (6). The end of the telescopic rod of the shock-absorbing cylinder (7) is hinged to the platform beam (5), and the other end of the cylinder body of the shock-absorbing cylinder (7) is hinged to the support bracket (6).

2. The continuous rigid frame bracket structure according to claim 1, characterized in that: The top bracket support structure of the pier (2) is provided with side templates (3) on both sides. The lower end of the side template (3) is hinged to the operating platform (4). The lower end of the inner surface of the side template (3) is sealed and snapped to the platform beam (5), and the lower end of the inner surface abuts against the surface of the pier (2).

3. The continuous rigid frame bracket structure according to claim 1, characterized in that: A buffer (15) is also provided in the middle of the demolding support beam (16), and the end surface of the telescopic rod of the buffer (15) is in contact with the outer side surface of the side template (3) after demolding; A spring is fitted on the telescopic rod of the buffer (15).

4. The continuous rigid frame bracket structure according to claim 1, characterized in that: Multiple pre-embedded threaded steel bars (8) at the bottom and pre-embedded threaded steel bars (9) at the top are embedded inside the pier column (2); The bottom pre-embedded threaded steel (8) and the top pre-embedded threaded steel (9) have recessed slots (20) at their ends. The platform beam (5) and the support bracket (6) are both equipped with mounting blocks (19). The mounting blocks (19) are inserted into the slots (20) and the platform beam (5) and the support bracket (6) are locked to the pier (2) by bolts and pre-embedded threaded steel.

5. A construction method for a continuous rigid frame bracket structure according to any one of claims 1-4, characterized in that: The method includes: S1, multiple threaded steel bars are pre-embedded during the pouring of the pier column (2), and slots (20) are pre-embedded at the ends of the threaded steel bars. S2. Assemble the platform beam (5) and support bracket (6) according to the design drawings. Install the assembled platform beam (5) and support bracket (6) on the four sides of the top of the pier (2). Strengthen the structure of the support bracket (6) by reinforcing beam (13). Install I-beams on the top of the platform beam (5) to assemble it into a platform. Assemble the operating platform (4) on the platform surface. S3. First install the side formwork (3) on the platform beam (5). The bottom of the side formwork (3) is assembled with the platform beam (5) by hinge. The side formwork (3) is filled with steel bars and inner formwork. After installation, the two side formwork (3) are tightened and fixed by interlocking steel bars. S4. After the beam (1) is poured, the inter-bracing steel bars are first removed. Two demolding support beams (16) are installed on the platform beam (5) on the side. After the demolding support beams (16) are fixed in position, a buffer (15) is installed in the middle of the demolding support beams (16). The top of the side formwork (3) is connected to the double-shaft winch (18) by passing the pulley at the end of the demolding support beam (16) through the demolding cable (14). The two shafts of the double-shaft winch (18) are connected to the top of the two side formworks (3). The double-shaft winch (18) pulls down the two side formworks (3) to start the demolding. S5. The side formwork (3) rotates outward under the action of the twin-shaft winch (18), and is buffered onto the platform beam (5) by the buffer (15). Then, the tower crane is used to disassemble and lift the side formwork (3) away. S6. The end face of the pier (2) is also covered with templates. The bottom of the end face template is connected to the bottom template frame (10). The bottom template frame (10) is set on the platform beam of the end face of the pier (2). The bottom template frame (10) is adjusted in height and the end face template is laid by the height adjustment device (12). S7. By rotating the nut (1203), the two adjusting plates (1205) are pushed to move relative to each other. The adjusting plate (1205) pushes the two pads (1207), and the two pads (1207) push the upper top plate (1201) and the lower bottom plate (1202). The upper top plate (1201) and the lower bottom plate (1202) push the supporting connecting beam (11) to rise or fall, thus completing the height adjustment of the bottom formwork frame (10). The bottom formwork frame (10) supports and pours the cantilever side of the beam body (1) end face. S8. After the beam body (1) end face is poured, the end formwork and bottom formwork frame (10) are dismantled. The height adjustment device (12) is adjusted to shrink, and the bottom formwork frame (10) falls down under the action of gravity to separate the formwork. S9. After the side formwork (3) and end formwork are installed, when pouring the beam (1), damping cylinders (7) are installed between the platform crossbeam (5) and the support bracket (6). Multiple damping cylinders (7) play a damping role to prevent the entire platform from vibrating and damaging the pier (2).

Images