Turnover Bailey beam side formwork truss type 0# block bracket and construction method

Abstract

A 0# block bracket bracket and construction method of a Bailey beam side form truss type that can be circulated, the bracket bracket structure includes a prestressed bracket system, a longitudinal and transverse beam system, a support frame system and a side form truss system, the prestressed bracket system is detachably connected and installed on the pier column, the longitudinal and transverse beam system is installed on the prestressed bracket system, and the support frame system and the side form truss system are installed on the longitudinal and transverse beam system; the bracket bracket construction steps are: step one, bracket design and processing; step two, prestressed bracket system installation; step three, longitudinal and transverse beam system installation; step four, support frame system installation; step five, side form truss system installation. The 0# block bracket bracket and construction method of the Bailey beam side form truss type that can be circulated adopt modular design, with a high degree of standardization, can be repeatedly used, and improve utilization, while reducing welding workload and having high safety.

Description

Technical Field

[0001] The invention relates to the technical field of 0# block construction of a continuous rigid frame bridge, and in particular to a rotatable Bailey beam side form truss type 0# block bracket and a construction method. Background Art

[0002] Continuous rigid frame bridges are widely used in bridge construction across rivers, canyons, etc. due to their advantages such as low cost, convenient construction, strong bending and torsion resistance, and low later operation and maintenance costs. Continuous rigid frame bridges are often constructed using the cantilever casting method. The 0# block is one of the key processes in the construction of the bridge structure as the benchmark segment. It is set on the top of the main pier, and its support system is often constructed using the bracket method.

[0003] In order to overcome the shortcomings of the embedded corbel structure, the prestressed corbel bracket structure came into being. This bracket eliminates the lateral deformation of the vertical rod of the corbel structure caused by the cantilever load during the construction process through prestressed tensioning, so as to ensure the overall stability and safety of the bracket system. However, the side formwork truss of the traditional prestressed corbel bracket adopts the form of welding the steel section and the formwork into one body, which occupies a large space during transportation and storage, is inconvenient to transport, has a large amount of welding, and has a low side formwork bearing capacity; at the same time, due to the different structural dimensions of different bridges, the 0# side formwork truss is only suitable for the construction of one bridge, with a low turnover rate, resulting in high material loss and increased construction costs. Summary of the invention

[0004] The purpose of the present invention is to provide a rotatable Bailey beam side form truss type 0# block bracket and a construction method to address the problems existing in the prior art. The technology adopts a modular design, has a high degree of standardization, can be repeatedly used, has a high utilization rate, and at the same time reduces the workload of welding operations and has high safety.

[0005] The present invention is achieved by adopting the following technical solutions: The rotatable Bailey beam side form truss type 0# block corbel bracket includes a prestressed corbel system, a longitudinal and transverse beam system, a support frame system and a side form truss system. The prestressed corbel system is detachably connected and installed on the pier, the longitudinal and transverse beam system is installed on the prestressed corbel system, and the support frame system and the side form truss system are installed on the longitudinal and transverse beam system.

[0006] The prestressed corbel system comprises a corbel, a precision-rolled threaded steel bar, a pre-embedded shear groove and a corbel crossbeam. The corbel is composed of a column, an upper chord, a diagonal bar, a web bar and a lower chord. The column, the upper chord and the diagonal bar are connected to form a right-angled triangle structure. One end of the column and the diagonal bar is welded to the lower chord. The web bar is arranged in the right-angled triangle structure, and they are all welded with channel steel. When processing each corbel component, each welding point must adopt groove welding, with internal and external penetration. The tensioning nodes of the industrial steel and the intersections of each rod are reinforced, and steel plates are welded to reinforce the intersections of the rods. In order to increase the overall stability of the two corbels, channel steel is used for processing and support, and the two corbels are connected into a whole. The columns and diagonal bars of the two corbels are respectively connected by welding with corbel crossbeams; the embedded shear groove is set in the pier body during the construction of the pier body of the last section of the pier column, and the pier body is also preset with a hole for inserting the lower chord rod. The hole is set with an embedded iron box to form a shear groove structure, and one end of the lower chord rod is inserted in the hole. The corbel passes through the embedded shear groove on the pier column to penetrate the fine-rolled threaded steel, and prestressing is performed after the concrete of the pier column reaches the design strength to form a prestressed corbel system.

[0007] The longitudinal and transverse beam system includes a lifting support, a bracket main beam, a vertical pole, a longitudinal distribution beam and a reinforcing web; the lifting support is arranged on the upper chord and column of the corbel, and is used to disassemble the bottom mold. The base of each lifting support is welded and fixed to the corresponding upper chord and column, and the top surface of the lifting support is adjusted to be at the same height; the bracket main beam adopts a transverse Bailey beam form, and reinforcing webs are installed at the upper chord positions on both sides of the Bailey beam, and the reinforcing webs are double-jointed channel steels; the vertical pole is arranged on the top of the column of the corbel, and is used to strengthen the stability of the stress concentration point on the innermost side of the corbel; the longitudinal distribution beam is arranged at the upper ends of both sides of the bracket main beam to form a longitudinal and transverse beam system. The longitudinal distribution beam and the bracket main beam form a longitudinal and transverse beam system, which plays the role of transferring loads. At the same time, the longitudinal distribution beam can serve as a supporting structure for the side mold truss system and act as a bottom plate platform bracket.

[0008] The support frame system includes a slope frame, a steel composite bottom formwork and a bottom plate platform; the slope frame is composed of a bottom frame, a top frame and a connecting frame. The bottom frame is arranged on the main crossbeam of the bracket in the form of an I-beam, and the top frame is in the form of a channel steel. The top frame is set to a slope matching the slope of the 0# bottom plate, and the top frame and the bottom frame are welded to form a whole through a connecting frame; a steel composite bottom formwork is installed on the slope frame; the bottom plate platform is welded with an extended channel steel on the slope frame and fully covered with patterned steel plates, which serves as a construction work platform at both ends, and is welded and fixed with 1.2m high protective railings on all sides.

[0009] The side form truss system comprises a Bailey beam side form truss, a connecting plate, a channel steel combined side form and a wing plate platform; the channel steel combined side form is provided with a secondary back rib, on which a connecting plate is welded; the Bailey beam side form truss is formed by connecting a plurality of vertical Bailey plates in series through a longitudinal connecting device; the vertical Bailey plates of the beam and the longitudinal connecting device are connected and fixed to the connecting plate by riding bolts; the top of the Bailey beam side form truss is vertically stiffened by Bailey plates; the wing plate platform uses I-beams as distribution beams placed on both sides of the side form frame and both sides of the wing plate top, and is fully paved with patterned steel plates as construction work platforms on both sides; 1.2m high guardrails are welded and fixed all around to provide good edge protection.

[0010] The construction process of the recyclable Bailey beam side form truss type 0# block bracket includes the following steps: Step 1: Bracket design and processing; The components of the bracket are pre-processed on-site and transported to the site for installation. First, the size of each component, welding quality, size and position of the embedded shear grooves in the pier body, and the position of the embedded pipes must be checked. Only when they meet the requirements can they be installed. During the construction process, the deformation and stability of the bracket are checked regularly, and any abnormalities are promptly reinforced.

[0011] Step 2: Installation of prestressed corbel system; After the construction of the last section of the pier is completed, the pier body formwork is removed first, and the pier cage ladder is retained as an operating platform for the installation of the prestressed corbel system; the corbel is installed by hoisting with a tower crane or a crane. When hoisting the corbel, the hoisting rope coincides with the center of gravity of the corbel, and the hoisting is smooth. The lower chord of the corbel is supported in the embedded iron box with manual assistance, and the lower chord is tightly attached to the embedded iron box. After the corbel is installed, a steel plate is inserted in the embedded iron box to constrain the horizontal displacement and prevent slippage; when installing the fine-rolled threaded steel tie rod, a steel wire rope is used to temporarily fix the corbel to the main reinforcement at the top of the pier. After the corbel is fixed, the fine-rolled threaded steel bar tie rod is inserted into the reserved tie rod hole, and the fine-rolled threaded steel bar is pulled according to the design load.

[0012] Step 3: Installation of longitudinal and transverse beam system; The main crossbeams of the bracket are assembled into groups on the ground, with two rows of Bailey beams as a group, and reinforcing webs are installed in the main crossbeams of the bracket at the position corresponding to the upper chord. The reinforcing webs are in the form of double-jointed channel steels, and then the whole group is hoisted onto the lifting support. The main crossbeams of the bracket are connected on the ground with a special flower rack. At the same time, a limit device needs to be welded on the lifting support, and then the support height is adjusted so that the beam elevation meets the requirements.

[0013] Step 4: Install the support frame system; The steel composite bottom formwork is supported by a slope frame. The slope frames are divided into a group on the ground and welded into a whole with channel steel. The grouped slope frames are then hoisted onto the main crossbeam of the bracket. After adjusting the position according to the measurement and layout, each group of slope frames are brought to the site and connected into one.

[0014] Step 5: Install the side formwork truss system; The Bailey beam side formwork truss should be assembled on the ground first, and the assembly of the components is simple and does not require welding; after the installation of the steel composite bottom formwork is completed and the elevation is verified, the Bailey beam side formwork truss is installed in blocks. After the channel steel composite side formwork is hoisted in place, the main reinforcement of the pier top and the side formwork are immediately tied by wire rope and hand winch, and then the next channel steel composite side formwork is hoisted and connected with the previous channel steel composite side formwork. After the single-side formwork is spliced ​​into a whole, the height and verticality of the side formwork are adjusted according to the adjusted bottom formwork. After the adjustment is completed, the channel steel composite side formwork and the Bailey beam side formwork truss can be fixed and connected, and the formwork on the other side can be hoisted in the same way. After the assembly is completed, the two side forms are welded to form a whole at both ends of the side formwork with channel steel on the upper part of the side formwork to increase the stability of the side formwork; then install 0# ordinary steel bars and prestressed steel bars, and fix the inner formwork by installing tie rods, and then pour 0# concrete in layers. The installation should be strictly assembled in accordance with the assembly sequence. During the assembly process, forced installation and unloading are prohibited to avoid damaging the components and affecting the use. During construction, check whether the corbels, longitudinal and transverse beam systems, slope frames, side formwork trusses and other structures meet the design requirements, including material specifications, erection methods, connection methods, etc. During the construction process, regularly check the deformation and stability of the brackets, and reinforce them in time if there are any abnormalities.

[0015] Further preferred: the tensile stress of the stretched fine-rolled threaded steel is not less than 1.2 times of the tensile force under the maximum load, the nuts are tightened, and the installation is carried out in a double-nut form, and the nuts are tightened again after the fine-rolled threaded steel is tensioned.

[0016] Further preferred: the 0# block template should have horizontal and vertical plate seams without misalignment and misalignment. When adjusting the template, pay attention to the adjustment of its axis and elevation, and the axis deviation should be within 1 cm.

[0017] Further preferred: the installation of the 0# block corbel bracket should be carried out strictly in accordance with the assembly sequence provided by the present technology, and forced installation and removal are prohibited during the assembly process to avoid damaging the components and affecting the use.

[0018] The present invention has the following beneficial effects: 1. The traditional 0# bracket side formwork truss and formwork panel are integrated, which takes up a lot of space during transportation and storage, and is inconvenient to transport. The 0# side formwork provided by this technology adopts an assembled structure, and the side formwork truss back ribs and formwork panels can be assembled and disassembled, saving a lot of space during transportation and storage. During the assembly process, the components are connected by bolts, and welding is not required, which greatly reduces the difficulty of operation.

[0019] 2. The traditional bracket side formwork truss is welded into one with steel and formwork. Due to the different structural dimensions of different bridges, the outer formwork of a 0# block is often only suitable for the construction of one bridge. The 0# block side formwork truss provided by this technology adopts a modular design, with Bailey plates as the main back ribs, a connecting steel plate welded on the back of the formwork, and the Bailey plates are connected to the panel by bolts. The web formwork is an ordinary steel formwork. After the Bailey plates and the panel are separated, they can be used for the construction of different bridge types 0# blocks or other structures. Most of the materials of the 0# block side formwork truss bracket provided by this technology can be repeatedly used, with high utilization rate and reduced material loss.

[0020] 3. The main back rib of the 0# block side form provided by this technology is a Bailey beam, which has a stronger bearing capacity than the traditional side form welded with steel sections, and can adapt to the construction of large-volume webs and flange plates. The Bailey side form trusses are assembled and constructed with a high degree of standardization, and the construction quality of the 0# block web concrete is guaranteed. Because the brackets provided by this technology can be flexibly assembled to meet the construction requirements of 0# block brackets with different spans and loads, and can also meet the requirements of the outer template of the hanging basket suspended casting section, it can be directly used for the web construction of subsequent suspended casting sections, and is widely applicable.

[0021] 4. The top of the 0# Bailey beam side formwork truss provided by this technology extends outward, allowing a protective platform of a certain operating width to be welded on the outside of the wing plate. At the same time, the bracket's corbels, longitudinal and transverse beam systems, slope frames, side formwork trusses, etc. are mainly assembled in the factory or on the ground, reducing the risk of high-altitude operations for construction workers and ensuring personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the Bailey beam side form truss type 0# block bracket; Figure 2 It is a schematic diagram of the cross-sectional structure of the Bailey beam side form truss type 0# block bracket; Figure 3 It is a schematic diagram of the cross-sectional structure of the side formwork truss system; Figure 4 It is a schematic diagram of the arrangement structure of the support frame system; Figure 5 It is a schematic diagram of the arrangement structure of the prestressed corbel system; Figure 6 It is a schematic diagram of the arrangement structure of the prestressed corbel system and the longitudinal and transverse beam system; The names of the parts corresponding to the serial numbers in the figure are: 1. Prestressed corbel system, 101. Corbel, 1011. Column, 1012. Upper chord, 1013. Diagonal bar, 1014. Web bar, 1015. Lower chord, 102. Finished rolled threaded steel bar, 103. Embedded shear groove, 104. Corbel beam, 2. Longitudinal and transverse beam system, 201. Lifting support, 202. Bracket main beam, 203. Column, 204. Longitudinal distribution beam, 205. Strengthen Web member, 3. Support frame system, 301. Slope frame, 302. Steel composite bottom formwork, 303. Bottom plate platform, 4. Side form truss system, 401. Vertical Bailey plate, 402. Bailey plate vertical stiffener, 403. Longitudinal connecting device, 404. Connecting plate, 405. Channel steel composite side formwork, 406. Riding bolt, 407. Wing plate platform, 5. Pier column, 6. 0# block, 7. Tie rod, 8. Inner formwork. DETAILED DESCRIPTION

[0023] The technical solutions in the invention are clearly and completely described below in conjunction with the embodiments. The described embodiments are only a part of the present invention, rather than all the embodiments. Example

[0024] The rotatable Bailey beam side form truss type 0# block corbel bracket comprises a prestressed corbel system 1, a longitudinal and transverse beam system 2, a support frame system 3 and a side form truss system 4. The prestressed corbel system 1 is detachably connected and installed on the pier 5, the longitudinal and transverse beam system 2 is installed on the prestressed corbel system 1, and the support frame system 3 and the side form truss system 4 are installed on the longitudinal and transverse beam system 2.

[0025] The prestressed corbel system 1 comprises a corbel 101, a finely rolled threaded steel bar 102, a pre-embedded shear groove 103 and a corbel cross beam 104. The corbel 101 is composed of a column 1011, an upper chord 1012, a diagonal bar 1013, a web bar 1014 and a lower chord 1015. The column 1011, the upper chord 1012 and the diagonal bar 1013 are connected to form a right-angled triangle structure. One end of the column 1011 and the diagonal bar 1013 are welded to the lower chord 1015. The web bar 1014 is arranged in the right-angled triangle structure, and they are all welded with channel steel. When processing each corbel component, each welding point must adopt groove welding, with internal and external penetration. The tensioning nodes of the industrial steel and the intersections of each rod are reinforced, and steel plates are welded to reinforce the intersections of the rods. In order to increase the overall stability of the two corbels, channel steel processing supports are used to connect the two corbels into a whole. The columns 1011 and diagonal bars 1013 of the two corbels 101 are welded and connected by corbel cross beams 104 respectively; the embedded shear groove 103 is set in the pier body when the pier body of the last section of the pier 5 is constructed, and the pier body is also preset with a hole for inserting the lower chord 1015, which is set by a pre-embedded iron box. The embedded iron box is set in the pier body when the pier body of the last section of the pier is constructed, forming a shear groove structure, one end of the lower chord 1015 is inserted in the hole, and the corbel 101 passes through the embedded shear groove 103 on the pier 5 to penetrate the fine-rolled threaded steel 102, and prestressing is performed after the concrete of the pier 5 reaches the design strength to form a prestressed corbel system 1.

[0026] The longitudinal and transverse beam system 2 includes a lifting support 201, a bracket main beam 202, a vertical pole 203, a longitudinal distribution beam 204 and a reinforcing web 205; the lifting support 201 is arranged on the upper chord 1012 and the column 1011 of the corbel 101, and is used to disassemble the bottom mold. The base of each lifting support 201 is welded and fixed to the corresponding upper chord 1012 and the column 1011, and the top surface of the lifting support 201 is adjusted to be at the same height; the bracket main beam 202 adopts a transverse Bailey beam form, and reinforcing webs 205 are installed at the upper chord 1012 position on both sides of the Bailey beam, and the reinforcing webs 205 are double-jointed channel steels; the vertical pole 203 is arranged on the top of the column 1011 of the corbel 101, and is used to strengthen the stability of the innermost stress concentration point of the corbel 101; the longitudinal distribution beam 204 is arranged at the upper ends of both sides of the bracket main beam 202 to form a longitudinal and transverse beam system 2. The longitudinal distribution beam 204 and the bracket main cross beam 202 form a longitudinal and cross beam system 2, which plays a role in transferring loads. At the same time, the longitudinal distribution beam 204 can serve as a supporting structure for the side form truss system 4 and act as a bracket for the bottom plate platform 303.

[0027] The support frame system 3 includes a slope frame 301, a steel composite bottom formwork 302 and a bottom plate platform 303; the slope frame 301 is composed of a bottom frame, a top frame and a connecting frame. The bottom frame is arranged on the main crossbeam 202 of the bracket in the form of an I-beam, and the top frame is in the form of a channel steel. The top frame is set to a slope matching the slope of the 0# block 6 bottom plate, and the top frame and the bottom frame are welded to form a whole through a connecting frame; the steel composite bottom formwork 302 is installed on the slope frame 301; the bottom plate platform 303 is welded on the slope frame 301 with an extended channel steel and fully covered with patterned steel plates, as construction work platforms at both ends, and is welded and fixed with 1.2m high guardrails on all sides.

[0028] The side form truss system 4 adopts a modular design, which includes a Bailey beam side form truss, a connecting plate 404, a channel steel combined side form 405 and a wing plate platform 407; the channel steel combined side form 405 is provided with a secondary back rib, the secondary back rib adopts a transverse channel steel, and a connecting plate 404 is welded on the secondary back rib. The Bailey beam side form truss is composed of multiple vertical Bailey plates 401 connected in series through a longitudinal connecting device 403. The Bailey beam side form truss is a 312 type Bailey beam structure. The vertical Bailey plates 401 and the longitudinal connecting devices 403 are connected and fixed to the connecting plates 404 by riding bolts 406. The top of the Bailey beam side form truss is a Bailey plate vertical stiffener 402. The wing plate platform 407 adopts an I-beam as a distribution beam and is placed on both sides of the side form frame and both sides of the wing plate top, and is fully paved with patterned steel plates as construction work platforms on both sides. 1.2m high guardrails are welded and fixed all around to provide good edge protection.

[0029] The construction process of the recyclable Bailey beam side form truss type 0# block bracket includes the following steps: Step 1: Bracket design and processing; The components of the bracket are pre-processed on-site and transported to the site for installation. First, the size of each component, welding quality, size and position of the embedded shear grooves in the pier body, and the position of the embedded pipes must be checked. Only when they meet the requirements can they be installed. During the construction process, the deformation and stability of the bracket are checked regularly, and any abnormalities are promptly reinforced.

[0030] Step 2: Installation of prestressed corbel system; After the construction of the last section of pier column 5 is completed, the pier body formwork of pier column 5 is first removed, and the pier column cage ladder is first retained as an operating platform for the installation of the prestressed corbel system 1; the corbel 101 is installed by a tower crane or a crane. When hoisting the corbel 101, the lifting rope coincides with the center of gravity of the corbel 101, and the hoisting is smooth. The lower chord rod 1015 of the corbel 101 is supported in the embedded iron box with manual assistance. The lower chord rod 1015 is tightly attached to the embedded iron box. After the corbel is installed, the steel plate is inserted into the embedded iron box for Horizontal displacement constraint to prevent slippage; when installing the high-quality rolled threaded steel tie rod, the wire rope is required to temporarily fix the corbel to the main reinforcement at the top of the pier. After the corbel is fixed, the high-quality rolled threaded steel bar 102 tie rod is inserted into the reserved tie rod hole, and the high-quality rolled threaded steel bar 102 is pulled according to the design load; for the pulled high-quality rolled threaded steel bar, the tensile stress shall not be less than 1.2 times of the tensile force under the maximum load, tighten the nuts, and it is advisable to use double nuts for installation, and tighten the nuts again after the high-quality rolled threaded steel bar is tensioned.

[0031] Step 3: Installation of longitudinal and transverse beam system; The main cross beams 202 of the bracket are assembled into groups on the ground, and are arranged in groups of two rows of Bailey beams. Reinforcing web members 205 are installed at the position corresponding to the upper chord 1012 in the main cross beams 202 of the bracket. The reinforcing web members 205 are in the form of double-jointed channel steels, and then the entire group is hoisted onto the lifting support 201; the main cross beams 202 of the bracket are connected on the ground with a special flower rack, and at the same time, a limit device needs to be welded on the lifting support, and then the support height is adjusted so that the beam elevation meets the requirements.

[0032] Step 4: Install the support frame system; The steel composite bottom formwork 302 is supported by a slope frame 301. The slope frames 301 are divided into groups of 5 on the ground and welded into a whole with channel steel. The grouped slope frames 301 are then hoisted onto the main crossbeam 202 of the bracket. After adjusting the position according to the measurement and layout, each group of slope frames 301 are brought into the site and connected into one.

[0033] Step 5: Install the side formwork truss system; The Bailey beam side formwork truss should first be assembled on the ground, and the assembly of the components is simple and does not require welding; after the installation of the steel composite bottom formwork 302 is completed and the elevation is verified, the Bailey beam side formwork truss is installed in blocks. After the channel steel composite side formwork 405 is hoisted in place, the main reinforcement of the pier top and the side formwork are immediately tied by wire rope and hand winch, and then the next channel steel composite side formwork 405 is hoisted and connected with the previous channel steel composite side formwork 405. After the single-side formwork is spliced ​​into a whole, the height and verticality of the side formwork are adjusted according to the adjusted bottom formwork. After the adjustment is completed, the channel steel composite side formwork 405 and the Bailey beam side formwork truss can be fixedly connected, and then the formwork on the other side can be hoisted in the same way. After the assembly is completed, the two side forms are welded to form a whole at the upper part of the side formwork with channel steel at both ends of the side formwork to increase the stability of the side formwork; then install 0# block 6 ordinary steel bars and prestressed steel bars, and fix the inner formwork 8 by installing tie rods 7, and then pour 0# block 6 concrete in layers.

[0034] The technology of this application has been applied in the construction of the 0# block of a continuous rigid frame bridge, which is a prestressed variable-section continuous rigid frame bridge with a span of 75+130+75m. The bridge is 9m wide, the main pier adopts a double-limb thin-walled pier, the pier column is 20.5m high, and the 0# block is 8m high.

[0035] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. The revolving Bailey beam side form truss type 0# block bracket is characterized by: The invention comprises a prestressed corbel system (1), a longitudinal and transverse beam system (2), a support frame system (3) and a side formwork truss system (4), wherein the prestressed corbel system (1) is detachably connected and installed on a pier column (5), the longitudinal and transverse beam system (2) is installed on the prestressed corbel system (1), and the support frame system (3) and the side formwork truss system (4) are installed on the longitudinal and transverse beam system (2).

2. The recyclable Bailey beam side form truss type 0# block bracket according to claim 1 is characterized in that: The prestressed corbel system (1) comprises a corbel (101), a finely rolled threaded steel bar (102), a pre-buried shear groove (103) and a corbel crossbeam (104); the corbel (101) is composed of a column (1011), an upper chord (1012), an inclined rod (1013), a web member (1014) and a lower chord (1015); the column (1011), the upper chord (1012) and the inclined rod (1013) are connected to form a right-angled triangle structure; one end of the column (1011) and the inclined rod (1013) are welded to the lower chord (1015); the web member (1014) is arranged in the right-angled triangle structure; the columns (1011) and the inclined rod (1013) of the two corbels (101) are connected to the lower chord (1015); the web member (1014) is arranged in the right-angled triangle structure; 1011) and the diagonal rod (1013) are respectively connected by welding with a corbel crossbeam (104); the embedded shear groove (103) is set in the pier body when the pier body of the last section of the pier column (5) is constructed, and a hole for inserting the lower chord rod (1015) is also preset on the pier body. The hole is set by an embedded iron box to form a shear groove structure. One end of the lower chord rod (1015) is inserted into the hole. The corbel (101) passes through the embedded shear groove (103) on the pier column (5) and is prestressed after the concrete of the pier column (5) reaches the design strength, so as to form a prestressed corbel system (1).

3. The recyclable Bailey beam side form truss type 0# block bracket according to claim 1 is characterized in that: The longitudinal and transverse beam system (2) comprises a lifting support (201), a bracket main cross beam (202), a vertical rod (203), a longitudinal distribution beam (204) and a reinforcing web rod (205); the lifting support (201) is arranged on the upper chord rod (1012) and the vertical column (1011) of the corbel (101) and is used to disassemble the bottom mold; the base of each lifting support (201) is welded and fixed to the corresponding upper chord rod (1012) and the vertical column (1011); and the top surface of the lifting support (201) is adjusted to be at the same a height; the bracket main crossbeam (202) is in the form of a transverse Bailey beam, and reinforcing web members (205) are installed at the positions of the upper chords (1012) on both sides of the Bailey beam, and the reinforcing web members (205) are double-jointed channel steels; the vertical rod (203) is arranged at the top of the column (1011) of the corbel (101) to strengthen the stability of the stress concentration point on the innermost side of the corbel (101); the longitudinal distribution beam (204) is arranged at the upper ends of both sides of the bracket main crossbeam (202) to form a longitudinal and transverse beam system (2).

4. The traversable Bailey beam side form truss type 0# block bracket according to claim 1 is characterized in that: The support frame system (3) comprises a slope frame (301), a steel composite bottom formwork (302) and a bottom plate platform (303); the slope frame (301) is composed of a bottom frame, a top frame and a connecting frame; the bottom frame is arranged on the main cross beam (202) of the bracket in the form of an I-beam; the top frame is arranged to match the slope of the bottom plate of the 0# block (6) according to the slope, and the top frame and the bottom frame are welded to form a whole through the connecting frame; the steel composite bottom formwork (302) is installed on the slope frame (301); the bottom plate platform (303) is welded on the slope frame (301) with an extended channel steel and fully covered with patterned steel plates, serving as a construction work platform at both ends.

5. The recyclable Bailey beam side form truss type 0# block bracket according to claim 1 is characterized in that: The side formwork truss system (4) comprises a Bailey beam side formwork truss, a connecting plate (404), a channel steel combined side formwork (405) and a wing plate platform (407); the channel steel combined side formwork (405) is provided with a secondary back rib, and a connecting plate (404) is welded on the secondary back rib; the Bailey beam side formwork truss is formed by connecting a plurality of vertical Bailey plates (401) in series via a longitudinal connecting device (403); the beam vertical Bailey plates (401) and the longitudinal connecting device (403) are connected and fixed to the connecting plate (404) via riding bolts (406); the top of the Bailey beam side formwork truss is a Bailey plate vertical reinforcement (402); the wing plate platform (407) uses an I-beam as a distribution beam and is placed on both sides of the side formwork frame and both sides of the wing plate top, and is fully paved with patterned steel plates to serve as a construction work platform on both sides.

6. The recyclable Bailey beam side form truss type 0# block bracket according to claim 1 is characterized in that: The construction process of the recyclable Bailey beam side form truss type 0# block bracket includes the following steps: Step 1: Bracket design and processing; The components of the bracket are pre-processed on site and transported to the site for installation. First, the size of each component, welding quality, size and position of the pre-buried shear grooves in the pier body, and the position of the pre-buried pipes must be checked. Only when they meet the requirements can they be installed. Step 2: Installation of prestressed corbel system; After the construction of the last section of the pier column (5) is completed, the pier body formwork of the pier column (5) is first removed, and the pier column cage ladder is first retained as an operating platform for installing the prestressed bracket system (1); the bracket (101) is installed by hoisting with a tower crane or a crane. When hoisting the bracket (101), the hoisting rope coincides with the center of gravity of the bracket (101), and the hoisting is smooth. The lower chord (1015) of the bracket (101) is supported in the embedded iron box with manual assistance, and the lower chord (1015) is tightly attached to the embedded iron box. After the bracket is installed, a steel plate is inserted into the embedded iron box to constrain horizontal displacement and prevent slippage; when installing the fine-rolled threaded steel tie rod, the bracket needs to be temporarily fixed to the main reinforcement at the top of the pier column by a steel wire rope. After the bracket is fixed, the fine-rolled threaded steel bar (102) tie rod is inserted into the reserved tie rod hole, and the fine-rolled threaded steel bar (102) is pulled according to the design load; Step 3: Installation of longitudinal and transverse beam system; The bracket main beams (202) are assembled into groups on the ground, and two rows of Bailey beams are arranged as one group. A reinforcing web member (205) is installed at a position corresponding to the upper chord (1012) in the bracket main beam (202). The reinforcing web member (205) is in the form of a double-jointed channel steel. The whole group is then hoisted onto the lifting support (201). The bracket main beams (202) are connected on the ground with a special flower rack. At the same time, a limit device needs to be welded on the lifting support. Then, the support height is adjusted so that the beam elevation meets the requirements. Step 4: Install the support frame system; The steel combined bottom formwork (302) is supported by a slope frame (301). The slope frames (301) are divided into groups of 5 on the ground and welded into a whole with channel steel. The grouped slope frames (301) are then hoisted onto the main crossbeam (202) of the bracket. After adjusting the position according to the measurement and setting out, each group of slope frames (301) is brought into the site and connected into a whole. Step 5: Install the side formwork truss system; The Bailey beam side formwork trusses are first assembled on the ground. After the steel composite bottom formwork (302) is installed and the elevation is verified, the Bailey beam side formwork trusses are installed in blocks. After the channel steel composite side formwork (405) is hoisted in place, the main reinforcement of the pier top and the side formwork are immediately tied together by wire rope and hand winch. Then the next channel steel composite side formwork (405) is hoisted and connected to the previous channel steel composite side formwork (405). After the single-side formwork is spliced ​​into a whole, it is adjusted according to the adjusted bottom formwork. After the height and verticality of the side formwork are adjusted, the channel steel combined side formwork (405) and the Bailey beam side formwork truss can be fixedly connected, and the formwork on the other side can be hoisted in the same way. After the assembly is completed, the two side forms are welded to the upper part of the side formwork with channel steel at both ends of the side formwork to form a whole, so as to increase the stability of the side formwork; then install 0# blocks (6) of ordinary steel bars and prestressed steel bars, and fix the inner formwork (8) by installing tie rods (7), and then pour 0# blocks (6) of concrete in layers.

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