CN114657882A - Super-huge type 0# block cast-in-place box girder bracket structure and mounting method thereof - Google Patents
Super-huge type 0# block cast-in-place box girder bracket structure and mounting method thereof Download PDFInfo
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- CN114657882A CN114657882A CN202210307239.8A CN202210307239A CN114657882A CN 114657882 A CN114657882 A CN 114657882A CN 202210307239 A CN202210307239 A CN 202210307239A CN 114657882 A CN114657882 A CN 114657882A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 223
- 239000010959 steel Substances 0.000 claims abstract description 223
- 238000010276 construction Methods 0.000 claims abstract description 42
- 238000003466 welding Methods 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000004873 anchoring Methods 0.000 claims description 43
- 238000009826 distribution Methods 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 10
- 238000009415 formwork Methods 0.000 claims description 5
- 238000005246 galvanizing Methods 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 3
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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Abstract
The invention relates to the technical field of road and bridge construction, in particular to an oversize 0# block cast-in-place box girder bracket structure and an installation method thereof, wherein the oversize 0# block cast-in-place box girder bracket structure comprises the following steps: step 1, pretreating a bracket foundation; step 2, installing pier body embedded parts; step 3, completing bracket assembly according to the assembly sequence; step 4, stretching the steel cable; step 5, installing a template; step 6, bracket prepressing detection; 7, constructing a 0# block box girder; compared with the traditional triangular bracket, the bridge bracket structure does not influence the navigation and passing requirements of the lower part of the bridge span; the structure is more stable, can resist wind load etc. has reduced construction safety risk when guaranteeing structure safety, can fine adaptation various large-scale 0# piece cast-in-place box girder constructions, and is safe, reliable, construction convenient. The bracket does not need a large number of tailor welding processes during installation, has high assembly efficiency, can realize quick installation and disassembly, can effectively shorten the whole construction period, improves the turnover utilization rate of materials, and has wide popularization and application values.
Description
Technical Field
The invention relates to the technical field of road and bridge construction, in particular to an oversize 0# block cast-in-place box girder bracket structure and an installation method thereof.
Background
With the increasing scale of road and bridge construction, large-scale continuous bridge construction projects are more common. Compared with the construction of common bridge engineering, the construction difficulty of the large continuous bridge is higher, the complexity is higher, and the technical requirements are stricter. The cast-in-place box girder 0# block has large dead weight, poor safety and higher construction technical difficulty, is not convenient for applying large machinery and is easily influenced by factors such as climate, geological conditions and the like, so that the guarantee of the construction quality of the cast-in-place box girder 0# block is a very critical link.
At present, the construction mode of a 0# block of a continuous beam (steel structure) bridge generally has two modes, one mode is a steel pipe pile support mode, and the other mode is a bracket support mode, such as a triangular bracket and the like. The steel pipe pile support needs to use a pre-poured bearing platform or a pre-poured concrete foundation as a bearing foundation, so that the requirement on the bearing capacity of a foundation is high, and the construction precision and the safety of the support can be influenced if the foundation is settled. Meanwhile, the material consumption of the landing support is large, and the landing support is not suitable for a bridge with a high pier. Therefore, in the bridge span with poor foundation and navigation and traffic requirements, the bracket is often adopted as the supporting structure of the 0# box girder template, and the embedded part is arranged to be welded with the bracket to support the upper box girder structure when the pier top or the pier body is poured. As a temporary structure, the bridge bracket mainly bears the vertical load of an upper structure and has higher requirements on the rigidity of a node of a connection area of the bridge bracket and a pier. Due to the uncertainty of the safety of the bracket, such as overlarge local stress at a node, poor stability and the like, and due to the reasons of poor management of a construction site, unqualified material use and the like, the bracket collapse accident happens occasionally, and the personnel casualties and property losses are caused. When the bracket is welded at high altitude, and the mounting accuracy of the bracket is insufficient due to deviation of the embedded part, the plane position of the bracket is difficult to adjust. Therefore, it is necessary to ensure the safety of the bracket structure, improve the installation accuracy and ensure the construction quality of the road and bridge engineering.
In view of the above-mentioned local atress of traditional bracket structure node too big, stability is relatively poor, construction installation accuracy appears the error scheduling problem easily, the application provides a super-huge 0# piece cast-in-place box girder bracket structure and mounting method thereof.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides the super-large 0# block cast-in-place box girder bracket structure and the mounting method thereof, which have the advantages of more stable structure, capability of resisting wind load and the like, capability of reducing construction safety risk while ensuring the structural safety, capability of well adapting to the construction of various large 0# block cast-in-place box girders, safety, reliability, convenience and quickness in construction and strong operability.
In order to achieve the purpose, the invention adopts the following technical scheme:
a mounting method of an oversize 0# block cast-in-place box girder bracket structure comprises the following specific steps:
pre-embedded threaded steel bars with the diameter of phi 28-phi 32 are arranged in the bridge pier at the node B, steel gaskets with the thickness of 12-16 mm are arranged at the end parts of the steel bars after the two ends of the steel bars are tensioned, and the steel gaskets are anchored by using anchoring bolts;
arranging pre-buried twisted steel in a reserved steel duct at a node C, and after tensioning two ends of the steel, arranging angle steel at one end to be connected with a steel cable to reinforce the end part; arranging a steel gasket at the other end of the steel gasket and anchoring the steel gasket by using an anchoring bolt;
arranging an embedded steel nail and an embedded steel plate at the node E, connecting the embedded steel plate and the embedded steel nail together in a welding mode, and arranging a steel bracket below the installation position of the lower cross beam for supporting so as to bear the dead weight of the bracket and the vertical shearing force generated by construction load;
and 3, completing the assembly of the brackets according to the assembly sequence: firstly, installing an upper cross beam and a lower cross beam on a pier by using a tower crane according to a design drawing and the positioning of an embedded part, welding the upper cross beam on a steel gasket at a node B in a welding mode, welding the lower cross beam on an embedded steel plate at a node E, and abutting the lower part of the lower cross beam against a steel corbel;
then, installing vertical rods, wherein the vertical rods are in the form of circular steel pipes, the upper ends and the lower ends of the vertical rods are provided with vertical rod end welding steel plates, 4 bolt holes are formed in the vertical rods, the vertical rods are arranged between the upper cross beam and the lower cross beam to play a supporting role, the vertical rods with fixed lengths are selected according to the supporting height, and are in anchoring connection with the upper cross beam and the lower cross beam through bolts;
finally, a steel cable is installed, the steel cable is a parallel steel cable consisting of phi 5 or phi 7 hot galvanizing high-strength steel wires, the strength is 1670MPa or 1770MPa, the upper end of the steel cable is anchored at the node C by using a bolt, and the lower end of the steel cable is abutted against the lower cross beam by using an anchoring block;
The invention also provides an oversize 0# block cast-in-place box girder bracket structure, which comprises a pile foundation and a bearing platform arranged on the pile foundation, wherein a pier is arranged on the bearing platform, an upper cross beam is arranged at the upper end part of the pier, a lower cross beam is arranged at the lower end part of the pier, the upper cross beam and the lower cross beam are arranged in parallel in an up-and-down correspondence manner, a vertical rod is arranged between the upper cross beam and the lower cross beam, the top of the vertical rod is fixedly connected with the upper cross beam, and the bottom of the vertical rod is fixedly connected with the lower cross beam;
the top of pier is equipped with the distributive girder, be provided with the sand section of thick bamboo between distributive girder and the entablature, install box girder template support on the distributive girder, install 0# piece box girder on the box girder template support.
Preferably, the position department that the entablature is connected with the pier is equipped with pre-buried twisted steel, the tip of pre-buried twisted steel is equipped with the steel gasket, the entablature passes through anchor bolt and is connected with pre-buried twisted steel anchor.
Preferably, the position department that the bottom end rail is connected with the pier is equipped with pre-buried steel nail and pre-buried steel sheet, pre-buried steel nail and pre-buried steel sheet welded fastening, bottom end rail and pre-buried steel sheet fixed connection, the below of bottom end rail and pier junction is equipped with the steel corbel.
Preferably, the 0# block cast-in-place box girder bracket structure further comprises a steel cable which is obliquely arranged, the upper end of the steel cable is connected with the pier in an anchoring mode through a stud, and the lower end of the steel cable is abutted to the lower cross beam through an anchoring block and an anchor head.
Preferably, a reserved steel bar hole is formed in the position of the joint of the steel cable and the pier, a pre-embedded threaded steel bar is arranged in the reserved steel bar hole, an angle steel is arranged at one end of the pre-embedded threaded steel bar, which is connected with the steel cable, and the steel cable is fixedly connected with the angle steel through a stud; and the other end of the embedded twisted steel is provided with a steel gasket and an anchoring bolt.
Preferably, the upper and lower ends of the vertical rod are provided with vertical rod end welding steel plates, the vertical rod end welding steel plates are provided with four bolt holes, and the upper and lower ends of the vertical rod are respectively connected with the upper cross beam and the lower cross beam through bolts in an anchoring manner.
Preferably, the steel cable is a parallel steel cable consisting of phi 5 or phi 7 hot galvanized high-strength steel wires.
Compared with the prior art, the invention has the following beneficial effects:
1. after the bracket is installed, the horizontal accuracy of the upper and lower beams can be adjusted through the tensioning steel cable, the steel cable consisting of parallel steel wires has good tensile property, and the levelness of box beam construction can be ensured; according to the invention, the steel corbels and the embedded parts are arranged at the joint of the lower cross beam and the pier, so that the local pressure-bearing part of the pier can be reinforced and protected, the pier body template cannot be damaged, the overall stability of the structure is improved, and the construction quality is enhanced.
2. Compared with the conventional support, the bracket structure does not influence the navigation and passing requirements of the lower part of the bridge span. Compared with the traditional triangular bracket, the invention has more stable structure, can resist wind load and the like, reduces the construction safety risk while ensuring the structure safety, can be well suitable for the construction of various large 0# block cast-in-place box girders, and has the advantages of safety, reliability, convenient construction and strong operability.
3. After the bracket is used, the invention can still be suitable for the construction of other continuous beam bridges, improves the turnover utilization rate of materials and has obvious economic benefit; meanwhile, the bracket does not need a large number of tailor welding processes during installation, is high in assembly efficiency, can realize rapid installation and disassembly, can effectively shorten the whole construction period, and has wide popularization and application values.
Drawings
FIG. 1 is a schematic view of a bracket according to the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic structural view of the vertical rod of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 1;
FIG. 5 is a cross-sectional view of a steel cord according to the present invention;
FIG. 6 is an enlarged view of portion B of FIG. 1;
FIG. 7 is an enlarged view of the portion C of FIG. 1;
FIG. 8 is an enlarged view of the portion D of FIG. 1;
fig. 9 is an enlarged view of the portion E in fig. 1.
In the figure: 1. 0# block box girder; 2. a box girder template support; 3. a distribution beam; 4. a sand cylinder; 5. an upper cross beam; 6. a bridge pier; 7. erecting a rod; 8. a steel cord; 9. reserving a steel bar hole channel; 10. a lower cross beam; 11. a steel corbel; 12. a bearing platform; 13. pile foundations; 14. the end part of the upright stanchion is welded with a steel plate; 15. bolt holes; 16. pre-burying a twisted steel bar; 17. a steel gasket; 18. an anchor bolt; 19. a steel wire; 20. angle steel; 21. a stud; 22. an anchoring block; 23. an anchor head; 24. pre-burying a steel plate; 25. pre-burying a steel nail; A. the vertical rods are anchored with the upper and lower cross beams; B. the upper cross beam and the pier anchoring node; C. anchoring nodes between the steel cable and the bridge piers; D. anchoring nodes between the steel cable and the lower cross beam; E. and the lower cross beam is connected with the pier anchoring node.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, so that those skilled in the art can better understand the advantages and features of the present invention, and thus the scope of the present invention is more clearly defined. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without inventive faculty based on the embodiments described herein are intended to fall within the scope of the present invention.
Referring to fig. 1-9, a mounting method of an oversize 0# block cast-in-place box girder bracket structure comprises the following specific steps:
as shown in fig. 6, the diameter of the embedded twisted steel 16 arranged in the bridge pier at the node B is phi 28 to phi 32, after the two ends of the twisted steel are tensioned, the end part is provided with a steel gasket 17, the thickness of the steel gasket is 12 to 16mm, and the steel gasket is anchored by using an anchor bolt 18;
as shown in fig. 7, pre-embedded threaded steel bars 16 are arranged in the reserved steel bar duct 9 at the node C, and after the two ends of the steel bars are tensioned, angle steel 20 is arranged at one end to be connected with the steel cable for end reinforcement; a steel gasket 17 is arranged at the other end and is anchored by an anchor bolt 18;
as shown in fig. 9, an embedded steel nail 25 and an embedded steel plate 24 are arranged at a node E, the embedded steel plate 24 and the embedded steel nail 25 are connected together in a welding manner, a steel bracket 11 is arranged below the installation position of the lower cross beam 10 for supporting, and the steel bracket 11 is used for bearing vertical shear force generated by the dead weight of the bracket, construction load and the like;
and 3, completing the assembly of the brackets according to the assembly sequence: as shown in fig. 1 and 2, firstly, according to the positioning of a design drawing and an embedded part, an upper cross beam 5 and a lower cross beam 10 are installed on a pier 6 by using a tower crane, the upper cross beam 5 and the lower cross beam 10 adopt a structural form of double-spliced I56 a-I56 c I-shaped steel according to actual engineering requirements, the upper cross beam 5 is welded on a steel gasket 17 at a node B in a welding mode, the lower cross beam 10 is welded on an embedded steel plate 24 at a node E, and the lower part of the lower cross beam 10 is abutted to a steel corbel 11;
as shown in fig. 3 and 4, a vertical rod 7 is installed, the vertical rod 7 is in a circular steel tube form, the upper end and the lower end of the vertical rod 7 are provided with vertical rod end welding steel plates 14, 4 bolt holes 15 are formed in the vertical rod, the vertical rod 7 is arranged between an upper cross beam and a lower cross beam to play a supporting role, the vertical rod with a fixed length is selected according to the supporting height, and is in anchoring connection with the upper cross beam and the lower cross beam through bolts;
finally, installing a steel cable 8, as shown in fig. 5, 7 and 8, wherein the steel cable 8 is a parallel steel cable consisting of phi 5 or phi 7 hot galvanizing high-strength steel wires, the strength is 1670MPa or 1770MPa, the upper end of the steel cable 8 is anchored at the node C by using a bolt 21, and the lower end of the steel cable 8 abuts against the lower beam 10 by using an anchoring block 22;
The utility model provides a super-huge 0# piece cast-in-place box girder bracket structure, refers to 1-2, includes pile foundation 13, locates cushion cap 12 on the pile foundation 13, be provided with pier 6 on the cushion cap 12, the upper end of pier 6 is provided with entablature 5, the lower tip of pier 6 is provided with bottom end rail 10, entablature 5 and bottom end rail 10 upper and lower correspond parallel arrangement, be equipped with the pole setting 7 of vertical setting between entablature 5 and the bottom end rail 10, the top and the entablature 5 fixed connection of pole setting 7, the bottom and the bottom end rail 10 fixed connection of pole setting 7.
The top of the pier 6 is provided with a distribution beam 3, a sand cylinder 4 is arranged between the distribution beam 3 and an upper cross beam 5, the distribution beam 3 is provided with a box girder template support 2, and the box girder template support 2 is provided with a 0# block box girder 1.
Specifically, referring to fig. 6, a pre-embedded threaded steel bar 16 is arranged at a position where the upper beam 5 is connected with the pier 6, a steel gasket 17 is arranged at an end of the pre-embedded threaded steel bar 16, and the upper beam 5 is connected with the pre-embedded threaded steel bar 16 in an anchoring manner through an anchor bolt 18.
Specifically, referring to fig. 9, the position department that the bottom end rail 10 is connected with pier 6 is equipped with pre-buried steel nail 25 and pre-buried steel sheet 24, pre-buried steel nail 25 and pre-buried steel sheet 24 welded fastening, bottom end rail 10 and pre-buried steel sheet 24 fixed connection, the below of bottom end rail 10 and pier 6 junction is equipped with steel corbel 11.
In this embodiment, set up steel corbel and built-in fitting through in bottom end rail and pier junction, can consolidate and protect the local pressure-bearing part of pier, can not produce the destruction to pier shaft template, promoted the overall stability of structure, strengthened construction quality.
Specifically, referring to fig. 7-8, the 0# block cast-in-place box girder bracket structure further includes a steel cable 8 disposed obliquely, an upper end of the steel cable 8 is connected to the pier 6 through a stud 21, and a lower end of the steel cable 8 is abutted to the lower beam 10 through an anchor block 22 and an anchor head 23.
Specifically, a reserved steel bar hole 9 is formed in the position of the joint of the steel cable 8 and the pier 6, an embedded threaded steel bar 16 is arranged in the reserved steel bar hole 9, an angle steel 20 is arranged at one end, connected with the steel cable 8, of the embedded threaded steel bar 16, and the steel cable 8 is fixedly connected with the angle steel 20 through a stud 21; and the other end of the embedded threaded steel bar 16 is provided with a steel gasket 17 and an anchoring bolt 18.
The steel cable 8 is a parallel steel cable consisting of phi 5 or phi 7 hot galvanizing high-strength steel wires 19, and the strength of the steel cable 8 is 1670MPa or 1770MPa so as to meet the actual use requirement.
In the embodiment, after the bracket is installed, the horizontal precision of the upper and lower beams can be adjusted through the tensioning steel cable, the steel cable consisting of parallel steel wires has good tensile property, and the levelness of the box girder construction can be ensured; meanwhile, embedded parts such as steel brackets are arranged on the local pressure-bearing part of the pier, the integral rigidity is good, the maintenance is easy, the pier body template cannot be damaged, the integral stability of the structure is improved, and the construction quality is enhanced.
The description and practice of the disclosure herein will be readily apparent to those skilled in the art from consideration of the specification and understanding, and may be modified and modified without departing from the principles of the disclosure. Therefore, modifications or improvements made without departing from the spirit of the invention should also be considered as the protection scope of the invention.
Claims (8)
1. The mounting method of the super-huge type 0# block cast-in-place box girder bracket structure is characterized by comprising the following specific steps of:
step 1, pretreatment of a bracket foundation: carrying out rolling compaction treatment on the foundation of the bracket construction area, ensuring that the foundation has enough bearing capacity, rigidity and stability and can bear the load generated in construction;
step 2, installing pier body embedded parts: accurately positioning according to a design drawing, arranging embedded parts at corresponding elevations of the bridge pier (6), wherein the positions needing to be provided with the embedded parts are an upper cross beam and bridge pier anchoring node B, a steel cable and bridge pier anchoring node C and a lower cross beam and bridge pier anchoring node E;
the embedded threaded steel bars (16) are arranged in the bridge pier at the node B, the diameter of each steel bar is phi 28-phi 32, after the two ends of each steel bar are tensioned, steel gaskets (17) are arranged at the end parts, the thickness of each steel gasket is 12-16 mm, and the steel gaskets are anchored by using anchor bolts (18);
pre-buried threaded steel bars (16) are arranged in a reserved steel bar pore channel (9) at the node C, and after the two ends of the steel bars are tensioned, angle steel (20) is arranged at one end, to which a steel cable needs to be connected, for end reinforcement; a steel gasket (17) is arranged at the other end and is anchored by an anchoring bolt (18);
arranging embedded steel nails (25) and embedded steel plates (24) at the nodes E, connecting the embedded steel plates (24) and the embedded steel nails (25) together in a welding mode, and arranging steel brackets (11) below the installation positions of the lower cross beams (10) for supporting so as to bear the dead weight of the bracket and the vertical shear force generated by construction load;
and 3, completing the assembly of the brackets according to the assembly sequence: firstly, according to a design drawing and the positioning of embedded parts, an upper cross beam (5) and a lower cross beam (10) are installed on a pier (6) by using a tower crane, the upper cross beam (5) is welded on a steel gasket (17) at a node B in a welding mode, the lower cross beam (10) is welded on an embedded steel plate (24) at a node E, and the lower part of the lower cross beam (10) is abutted to a steel corbel (11);
then, installing an upright rod (7), wherein the upright rod (7) is in a circular steel pipe form, welding steel plates (14) at the end parts of the upright rod are arranged at the upper end and the lower end of the upright rod (7), 4 bolt holes (15) are formed in the welded steel plates, the upright rod (7) is arranged between the upper cross beam (5) and the lower cross beam (10) to play a supporting role, the upright rod with a fixed length is selected according to the supporting height, and the upright rod is in anchoring connection with the upper cross beam and the lower cross beam through bolts;
finally, a steel cable (8) is installed, the steel cable (8) is a parallel steel cable consisting of phi 5 or phi 7 hot galvanizing high-strength steel wires, the strength is 1670MPa or 1770MPa, the upper end of the steel cable (8) is anchored at the node C by using a stud (21), and the lower end of the steel cable (8) is abutted against the lower cross beam (10) by using an anchoring block (22);
step 4, stretching the steel cable: after anchoring of the steel cable (8), tensioning the steel cable to meet the design requirement, adjusting the horizontal precision of the upper cross beam and the lower cross beam through tensioning the steel cable (8), anchoring the lower end of the steel cable (8) at the bottom of the lower cross beam (10) by using an anchor head (23) after tensioning is finished, and then firmly welding the upper end of the steel cable (8) with an embedded part at a node C;
step 5, template installation: after single brackets on two sides of the pier are installed in place, the two sides of the pier are adjusted to be at the same elevation, the 0# bracket is guaranteed to be stressed uniformly, safety is guaranteed, and then a sand cylinder (4) is arranged between an upper cross beam (5) and a distribution beam (3) of the bracket; the distribution beam (3) adopts double-spliced I45 a-I45 c I-shaped steel according to actual engineering requirements, and then a 0# box girder template bracket (2) is constructed on the distribution beam (3) to support a bottom die and an abdomen template;
step 6, bracket prepressing detection: before the 0# box girder (1) is poured, three-stage prepressing of no load, 50% load and 100% load is carried out on the bracket part by adopting a sand bag, the deformation amount of the bracket part is detected so as to eliminate foundation deformation and inelastic deformation of the bracket, and the actual bearing capacity and the safety of the bracket during normal use are detected;
step 7, construction of 0# block box girder: pouring a 0# box girder (1) girder body, and removing the formwork after the concrete reaches the design strength; and then removing the bracket and repairing the pier anchoring node.
2. The super-huge type 0# block cast-in-place box girder bracket structure is characterized by comprising a pile foundation (13) and a bearing platform (12) arranged on the pile foundation (13), wherein a pier (6) is arranged on the bearing platform (12), an upper cross beam (5) is arranged at the upper end part of the pier (6), a lower cross beam (10) is arranged at the lower end part of the pier (6), the upper cross beam (5) and the lower cross beam (10) are arranged in parallel in an up-down corresponding mode, a vertical upright rod (7) is arranged between the upper cross beam (5) and the lower cross beam (10), the top of the upright rod (7) is fixedly connected with the upper cross beam (5), and the bottom of the upright rod (7) is fixedly connected with the lower cross beam (10);
the top of pier (6) is equipped with distribution roof beam (3), be provided with sand section of thick bamboo (4) between distribution roof beam (3) and entablature (5), install case roof beam formwork support (2) on distribution roof beam (3), install 0# piece case roof beam (1) on case roof beam formwork support (2).
3. The super-huge type 0# block cast-in-place box girder bracket structure according to claim 2, characterized in that embedded threaded steel bars (16) are arranged at the positions where the upper cross beams (5) are connected with the piers (6), steel gaskets (17) are arranged at the end parts of the embedded threaded steel bars (16), and the upper cross beams (5) are connected with the embedded threaded steel bars (16) in an anchoring manner through anchoring bolts (18).
4. The super-huge type 0# block cast-in-place box girder bracket structure according to claim 2, characterized in that a position where the lower beam (10) is connected with the pier (6) is provided with an embedded steel nail (25) and an embedded steel plate (24), the embedded steel nail (25) and the embedded steel plate (24) are welded and fixed, the lower beam (10) is fixedly connected with the embedded steel plate (24), and a steel corbel (11) is arranged below the joint of the lower beam (10) and the pier (6).
5. The oversize cast-in-place box girder bracket structure with 0# block as claimed in claim 2, characterized in that the cast-in-place box girder bracket structure with 0# block further comprises an obliquely arranged steel cable (8), the upper end of the steel cable (8) is connected with a pier (6) in an anchoring manner through a stud (21), and the lower end of the steel cable (8) is abutted against the lower cross beam (10) through an anchoring block (22) and an anchor head (23).
6. The super-huge type 0# block cast-in-place box girder bracket structure according to claim 5, characterized in that a reserved steel bar hole (9) is arranged at the joint of the steel cable (8) and the pier (6), a pre-embedded threaded steel bar (16) is arranged in the reserved steel bar hole (9), an angle steel (20) is arranged at one end of the pre-embedded threaded steel bar (16) connected with the steel cable (8), and the steel cable (8) is fixedly connected with the angle steel (20) through a stud (21); and a steel gasket (17) and an anchoring bolt (18) are arranged at the other end of the embedded threaded steel bar (16).
7. The super-huge type 0# block cast-in-place box girder bracket structure according to claim 2, characterized in that the upper and lower ends of the vertical rod (7) are provided with vertical rod end welding steel plates (14), the vertical rod end welding steel plates (14) are provided with four bolt holes (15), and the upper and lower ends of the vertical rod (7) are respectively connected with the upper cross beam (5) and the lower cross beam (10) in an anchoring manner through bolts.
8. The super-huge type 0# block cast-in-place box girder bracket structure according to claim 5, characterized in that the steel cables (8) are parallel steel cables composed of phi 5 or phi 7 hot galvanized high-strength steel wires (19).
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