CN115341467B - Highway-railway dual-purpose river-crossing A-shaped stay cable anchoring structure and construction method thereof - Google Patents

Abstract

The invention provides an A-type cable-stayed cable anchorage structure and construction method for road-rail dual-purpose across the river, including a steel anchor beam and a steel corbel assembly. Between the corbel components; the first stiffener and the reinforcing plate are arranged on the embedded steel plate of the tower wall, which can significantly improve the shear strength and structural stability of the embedded steel plate of the tower wall; among them, the reinforcing plate is connected with the steel corbel Symmetry can prevent cracking at the connection between the steel corbel and the pre-embedded steel plate of the tower wall due to excessive force. The pre-embedded steel plate of the tower wall can not only be connected with the tower column through shear nails, but also the embedded steel plate of the tower wall can be connected with the tower column through the first stiffening plate and the reinforcing plate; Shear studs are provided on the reinforcing plate and the reinforcing plate, and the angles of the first shear stud, the second shear stud and the third shear stud are different, so that the connection firmness between the tower wall pre-embedded steel plate and the tower column in the present invention is Greatly enhanced, and further improved the shear strength.

Description

An A-type cable-stayed cable anchorage structure and its construction method for road-rail dual-purpose cross-river

technical field

The invention belongs to the technical field of bridge engineering, and in particular relates to an A-type cable-stayed anchorage structure and a construction method thereof for both highway and railway crossing rivers.

Background technique

Cable-stayed bridges have many advantages such as large span, high rigidity, light structure weight, and low cost, and are widely used in long-span bridge projects. Among them, the cable-stayed anchorage structure is an important part of the cable-stayed bridge. The stay cable anchorage structure includes a steel corbel assembly and a steel anchor beam. Each corbel roof directly supports a steel box girder. The steel corbel assembly is the supporting structure of the steel anchor beam. The installation accuracy and structural fastness of the steel corbel assembly directly depend on the safety performance of the stay cable anchorage structure. .

However, the steel corbel assembly of the existing cable-stayed anchorage structure has the following problems: 1. The installation precision of the steel corbel assembly is low, and it is not easy to assemble with the steel anchor beam; 2. The strength of the steel corbel assembly is low, and the structural stability is poor , has been deformed and bent, posing a safety hazard.

Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies in the prior art.

Contents of the invention

The object of the present invention is to provide a stay cable anchorage structure and its construction method, which can solve the deficiencies in the prior art.

In order to achieve the above object, the present invention provides the following technical solutions:

An A-type cable-stayed cable anchorage structure for road-rail dual-purpose across the river, comprising a steel anchor beam and a steel corbel assembly, the two ends of the steel anchor beam are correspondingly supported between the two oppositely arranged steel corbel assemblies;

The steel corbel assembly includes a pre-embedded steel plate unit and a steel corbel;

The pre-embedded steel plate unit includes:

Pre-embedded steel plates in the tower wall, the pre-embedded steel plates in the tower wall are arranged vertically, and the inner lower part is fixed with the steel corbels;

The first stiffening plate is fixed on the outer side of the pre-embedded steel plate of the tower wall, and the first stiffening plate is provided with a first shear nail;

Reinforcement plates are fixed horizontally on the outside of the pre-embedded steel plate of the tower wall and are distributed opposite to the steel corbels, and second shear studs are arranged on the reinforcement plates;

The third shear stud is fixed on the outer surface of the pre-embedded steel plate of the tower wall;

The anchor pipe is provided with an anchor pipe hole corresponding to the anchor pipe on the pre-embedded steel plate of the tower wall, and one end of the anchor pipe passes through the anchor pipe hole and protrudes outside the pre-embedded steel plate of the tower wall, The other end of the anchor pipe points to the anchor plate on the steel anchor beam.

Preferably, the two steel corbels are distributed symmetrically along the vertical centerline of the pre-embedded steel plate in the tower wall;

The steel corbels include:

web, the web is vertically fixed on one side of the tower wall pre-embedded steel plate corresponding to the steel anchor beam;

The first top plate is horizontally fixed on the top of the web, and is correspondingly connected with the pre-embedded steel plate of the tower wall, and a backing plate is provided on the surface of the first top plate, and the steel anchor beam is supported on the backing plate;

The first bottom plate is horizontally fixed on the bottom of the web plate and correspondingly connected with the pre-embedded steel plate of the tower wall;

The second stiffener is vertically fixed on both sides of the web, its upper end is fixed to the lower surface of the first top plate, and its side is fixed to the side of the web.

Preferably, the reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate, the upper reinforcing plate corresponds to the shape, size and height of the first top plate; the lower reinforcing plate corresponds to the first top plate The shape, size and height of the first bottom plate are all corresponding.

Preferably, the first stiffening plate is divided into an upper section and a lower section;

The upper part of the first stiffening plate is located on the upper part of the upper reinforcing plate, and its upper and lower ends are respectively flush with the upper end of the pre-embedded steel plate in the tower wall and the upper end surface of the first stiffening plate;

The lower section of the first stiffening plate is located between the upper stiffening plate and the lower stiffening plate.

A construction method for an A-type cable-stayed cable-stayed anchorage structure across a river for road and rail, comprising the following steps:

S1, assemble the steel anchor beam and steel corbel components respectively, and install the temporary reinforcement matching components for the tooling;

S2. Machining the surface of the backing plate for installation between the steel anchor beam and the steel corbel so that the friction coefficient of the backing plate between the steel anchor beam and the steel corbel is ≤0.05;

S3, the steel anchor beam and steel corbel components are assembled as a whole, the steel anchor beam at the side span end is connected to the steel corbel with high-strength bolts to form a consolidation state, and the steel anchor beam at the side of the main span and the steel corbel are connected with high-strength bolts to form a consolidated state. Bolts are temporarily consolidated, and the overall structure is formed by temporarily reinforcing matching components;

S4, hoist the steel anchor beam and steel corbel as a whole, and pour concrete for the tower column of the corresponding section according to the construction progress; before tensioning the corresponding stay cables, pre-tighten the temporarily consolidated high-strength bolts on the side steel anchor beam of the main span Release the force, and ensure that the nuts and washers do not fall off, and remove the temporary reinforcement matching components for the assembly tooling;

S5, after the tensioning of the stay cables of the whole bridge is completed, tighten the high-strength bolts between the main span side steel anchor beam and the steel corbel to completely lock the relative sliding between the steel anchor beam and the steel corbel.

Preferably, in the step S1, the assembling steps of the steel corbel assembly are:

S101, draw vertical and horizontal reference lines on the outside of the pre-embedded steel plate on the tower wall, draw the position line of the first stiffening plate and reinforcing plate on the embedded side according to the vertical and horizontal reference line, and assemble the first stiffening plate and reinforcing plate according to the position line;

S102, draw the positioning line of the steel corbel and the projection line of the anchor pipe on the embedded steel plate of the tower wall on the inner side of the embedded steel plate of the tower wall;

S103, using a laser measuring instrument to cooperate with assembling the steel corbel, welding the penetration weld between the steel corbel and the pre-embedded steel plate in the tower wall, and then using post-welding flame to correct welding deformation;

S104, placing the pre-embedded steel plate on the tower wall vertically on the steel platform, installing and welding the anchor pipe through the projection line of the anchor pipe in cooperation with the projected ground sample.

Preferably, in the step S1, the step of assembling the steel corbel includes: first placing the first top plate horizontally, and drawing the vertical and horizontal reference lines; according to the vertical and horizontal reference lines, sequentially drawing the position lines of the web and the second stiffening plate, Assemble the web and the second stiffener in sequence according to the position line; then draw the position line of the web on the first bottom plate, and assemble the web and the first bottom plate together according to the position line.

Preferably, in step S102, first retest the deviation of the external dimension of the pre-embedded steel plate in the tower wall, correct the vertical and horizontal baselines when marking the line, and then use the vertical and horizontal baselines as a reference to find out the assembly position of the top surface of the first roof as Assembly benchmark.

Preferably, in step S103, the web plate, the first top plate and the first bottom plate of the steel corbel are respectively welded to the pre-embedded steel plate of the tower wall.

Preferably, in step S101, before assembly, the shear studs are welded to the pre-embedded steel plate, the first stiffener plate and the reinforcement plate in advance, and the shear studs that affect the weld can be assembled in a single unit After welding.

Beneficial effects: the present invention can significantly improve the shear strength and structural stability of the pre-embedded steel plate on the tower wall by arranging the first stiffening plate and the reinforcing plate on the pre-embedded steel plate of the tower wall; Symmetry can prevent cracking at the connection between the steel corbel and the pre-embedded steel plate of the tower wall due to excessive force. The pre-embedded steel plate of the tower wall can not only be connected with the tower column through shear nails, but also the embedded steel plate of the tower wall can be connected with the tower column through the first stiffening plate and the reinforcing plate; Shear studs are provided on the reinforcing plate and the reinforcing plate, and the angles of the first shear stud, the second shear stud and the third shear stud are different, so that the connection firmness between the pre-embedded steel plate of the tower wall and the tower column in the present invention is Greatly enhanced, and further improved the shear strength.

To sum up, in the present invention, since the structure of the steel corbel assembly is stable, safe and reliable, the overall stability, safety and reliability of the stay cable anchorage structure are greatly improved.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. in:

Fig. 1 is the installation schematic diagram of stay cable anchorage structure among the present invention;

Fig. 2 is the structural representation of stay cable anchorage structure among the present invention;

Fig. 3 is the structural representation of steel anchor beam in the present invention;

Fig. 4 is the structural representation of steel corbel assembly in the present invention;

Fig. 5 is a schematic diagram of the assembly of the pre-embedded steel plate of the tower wall of the Sinosteel corbel assembly of the present invention.

In the figure: 1. Tower column; 2. Stay cable; 3. Anchoring structure; 301. Pre-embedded steel plate in the tower wall; 302. First bottom plate; 303. Web plate; 304. Backing plate; 305. Second stiffening plate; 306, the first top plate; 307, the upper reinforcing plate; 308, the lower reinforcing plate; 309, the first stiffening plate; 310, the anchor pipe; 311, the anchor plate; 312, the second bottom plate; 313, the partition; 314 , side tension plate; 315, transverse stiffener; 316, vertical stiffener; 317, pressure-bearing parts.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top", "bottom", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation, so they cannot be understood as Limitations on the Invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, for example, it can be fixedly connected or detachably connected; it can be directly connected or indirectly connected through intermediate parts, for ordinary A skilled person can understand the specific meanings of the above terms according to specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

The embodiment of cable-stayed anchorage structure in the present invention is as shown in Fig. 1-5, a kind of A-type cable-stayed anchorage structure of highway and railway crossing the river, anchorage structure 3 comprises steel anchor beam and steel corbel assembly, a group of relative steel The corbel components are located on opposite sides of the hollow cable tower, and the two ends of the steel anchor beam are supported on a pair of steel corbel components. The steel corbel components include pre-embedded steel plate units and steel corbels. The steel anchor beam and the steel corbel are connected by bolts. The embedded steel plate unit includes the tower wall embedded steel plate 301, the first stiffening plate 309, the third shear stud, the anchor pipe 310 and the reinforcement plate: the tower wall embedded steel plate 301 is arranged vertically and is used to connect with the tower column 1 , the inner lower part of the tower wall embedded steel plate 301 is fixed with a steel corbel, and the middle part of the tower wall embedded steel plate 301 is provided with an anchor pipe 310 hole; the tower wall embedded steel plate 301 is provided with an anchor pipe 310 corresponding to the anchor pipe 310 hole, one end of the anchor pipe 310 passes through the anchor pipe 310 hole and stretches out the outside of the tower wall embedded steel plate 301, and the other end of the anchor pipe 310 points to the anchor backing plate 311 on the steel anchor beam. The first stiffening plate 309 is fixed on the outside of the tower wall embedded steel plate 301, and the first stiffening plate 309 is provided with a first shear nail; Symmetrical, the second shear nail is set on the reinforcing plate; the third shear nail is fixed on the outer surface of the pre-embedded steel plate 301 of the tower wall. The tower wall pre-embedded steel plate 301, the first stiffening plate 309, the reinforcing plate, the first shear stud, the second shear stud and the third shear stud of the anchorage structure 3 of the stay cable 2 are all cast on the tower wall. Inside the concrete of column 1, the connection between the pre-embedded steel plate 301 on the tower wall and the tower column 1 is strong; It is heavy and causes cracking, which improves safety and stability. In the present invention, the tower wall pre-embedded steel plate 301 has strong shear resistance, which can effectively prevent the tower wall pre-embedded steel plate 301 from bending, and greatly improve the overall stability and safety reliability of the anchoring structure 3 .

In an optional embodiment of the present invention, the first shear stud is arranged vertically to the first stiffening plate 309, the second shear stud is arranged perpendicular to the reinforcing plate, and the third shear stud is arranged vertically to the pre-embedded steel plate of the tower wall. 301 is arranged vertically. Alternatively, the first shear stud and the first stiffening plate 309 are arranged obliquely, the second shear stud is arranged obliquely to the reinforcing plate, and the third shear stud is arranged obliquely to the pre-embedded steel plate 301 of the tower wall.

In an optional embodiment of the present invention, two steel corbels are arranged on the inner side of the tower wall embedded steel plate 301 , and the two steel brackets are symmetrically distributed along the vertical center line of the tower wall embedded steel plate 301 . The steel corbel includes a web 303, a first top plate 306, a first bottom plate 302 and a second stiffening plate 305. The web 303 is arranged vertically and is perpendicular to the pre-embedded steel plate 301 of the tower wall. The web 303 and the pre-embedded steel plate of the tower wall 301 is fixedly connected, and the edge of the web 303 is welded together with the pre-embedded steel plate 301 of the tower wall; the first top plate 306 is fixed on the top of the web 303, and a backing plate 304 is provided on its surface, and the backing plate 304 is polytetrafluoroethylene plate, the steel anchor beam is supported on the polytetrafluoroethylene plate; the first bottom plate 302 is fixed on the bottom of the web 303; The surface is fixed, and its side is fixed to the side of the web 303, which is used to improve the strength and stability of the steel corbel. PTFE board has excellent characteristics such as high and low temperature resistance (-192°C-260°C), corrosion resistance (strong acid, strong alkali, aqua regia, etc.), weather resistance, high insulation, high lubrication, non-adhesion, and non-toxic. The use of the polytetrafluoroethylene plate can reduce the possibility of corrosion at the connection between the steel anchor beam and the steel corbel, and improve the overall stability of the anchor structure 3 .

In an optional embodiment of the present invention, the reinforcing plate includes an upper reinforcing plate 307 and a lower reinforcing plate 308, and the upper reinforcing plate 307 corresponds to the shape, size and height of the first top plate 306; the lower reinforcing plate The plate 308 corresponds to the shape, size and height of the first bottom plate 302, so that a set of upper reinforcing plates 307 and lower reinforcing plates 308 are arranged corresponding to each steel corbel on the other side of the embedded steel plate 301 in the tower wall The reinforcing plate can reinforce the embedded steel plate 301 of the tower wall and the steel corbel to prevent the connection between the steel corbel and the embedded steel plate 301 of the tower wall from cracking due to excessive force.

In an optional embodiment of the present invention, the first stiffening plate 309 is divided into an upper section and a lower section; The upper end is flush with the upper end face of the first stiffening plate 309;

The lower section of the first stiffening plate 309 is located between the upper stiffening plate 307 and the lower stiffening plate 308 .

Because the height of the upper reinforcing plate 307 and the lower reinforcing plate 308 is the same as that of the steel corbel, and the lower section of the first stiffening plate 309 has a connection supporting effect on the upper reinforcing plate 307 and the lower reinforcing plate 308, the first stiffening plate 309 An I-shaped structure is formed with the upper reinforcing plate 307 and the lower reinforcing plate 308, which corresponds to the steel corbel.

In an optional embodiment of the present invention, the steel anchor beam is a box structure, including: a second bottom plate 312 , a side tension plate 314 unit, a pressure bearing plate assembly and a partition 313 . The two side pull plate 314 units are arranged symmetrically along the width direction of the second bottom plate 312 . Two sides of the second bottom plate 312 in the length direction are respectively provided with a pressure bearing plate assembly, and the pressure bearing plate assembly is located inside the two side pull plate 314 units. The partition plate 313 is located on the upper part of the second bottom plate 312 and between the two side pull plate 314 units for supporting the side pull plate 314 units.

The second bottom plate 312 is rectangular, and the second bottom plate 312 is provided with a first central hole, and the first central hole is a rectangular hole.

The side tension plate 314 unit includes a side tension plate 314 and a third stiffening plate, the third stiffening plate is fixed on the outer surface of the side tension plate 314, and the third stiffening plate and the side tension plate 314 are perpendicular to each other; the third stiffening plate includes a transverse stiffening plate Plate 315 and vertical stiffener 316, the upper and lower sides of the transverse stiffener 315 are provided with vertical stiffener 316; There are three each, and correspond to the vertical stiffeners 316 on the lower side of the corresponding transverse stiffeners 315 .

The two sides of the partition plate 313 are tightly fitted with the inner surfaces of the two side pull plates 314 respectively. The partition 313 is provided with a second central hole, which is a round hole. There are four partitions 313 , two are end partitions 313 and two are internal partitions 313 . The two ends of the second bottom plate 312 in the length direction are respectively provided with an end partition 313, and two internal partitions 313 are arranged between the two pressure bearing plate assemblies, and the two internal partitions 313 are located on the first side of the second bottom plate 312. both sides of the center hole.

In this embodiment, the pressure bearing plate assembly includes a pressure bearing 317 and an anchor plate 311, the pressure bearing 317 is a square box welded by steel plates, and its size is suitable for the distance between the two side pull plates 314 Matching, there are hinge shafts corresponding to the hinged side pull plates 314 protruding from both sides of the pressure member 317, the two ends of the pressure member 317 are provided with perforations corresponding to the anchor pipe 310, and the anchor pad 311 is arranged on the pressure member 317 away from the anchor The upper end surface of the pipe 310; after the steel anchor beam and the steel corbel are hoisted to the tower column 1, the steel corbel is poured into the hollow cable tower of the tower column 1, and an adjustment hole corresponding to the anchor pipe 310 is reserved on the outer wall of the tower column 1 to adjust The diameter of the hole is larger than the outer diameter of the anchor pipe 310 , and one end of the anchor pipe 310 corresponding to the pressure bearing 317 is welded and fixed to the pressure bearing 317 . In this embodiment, anchor pipe 310 holes are also provided on the bulkhead 313 at least at both ends of the steel anchor beam, and the diameter of the anchor pipe 310 holes on the bulkhead 313 and the tower wall pre-embedded steel plate 301 is greater than the diameter of the anchor pipe 310, so that the anchor pipe 310 can be adjusted in angle, preferably, the hole of the anchor tube 310 is a waist-shaped hole extending longitudinally.

The anchor tube 310 is rotated by the pressure member 317 by applying a preloaded tension to the stay cable 2 , so as to accurately angle the anchor tube 310 , and then the pressure member 317 and the two side pull plates 314 are welded and fixed. The anchor backing plate 311 is the main pressure-bearing member, the side tension plate 314 is the main tension member, the thickness of the third stiffening plate outside the side tension plate 314 is 16-20 mm, and the thickness of the partition plate 313 in the middle of the tension plates 314 on both sides is 16mm.

The present invention also provides a construction method for the anchorage structure of A-type cable-stayed cables across the river for road and rail, comprising the following steps:

S1, assemble the steel anchor beam and steel corbel components respectively, and install the temporary reinforcement matching components for the tooling;

S2, machining the surface of the backing plate 304 for installation between the steel anchor beam and the steel corbel, so that the friction coefficient of the sliding end of the steel anchor beam is ≤0.05;

S3, the steel anchor beam and steel corbel components are assembled in the factory; the side span end steel anchor beam and the steel corbel are connected by high-strength bolts to form a consolidated state, and the main span side steel anchor beam and steel corbels are connected by high-strength bolts Temporary consolidation, ensuring that the high-strength bolts and nuts are facing downwards, and the assembly tooling is temporarily reinforced with matching components to form an overall structure before leaving the factory;

S4, hoist the steel anchor beam and steel corbel as a whole, and then pour concrete for the tower column 1; before tensioning the corresponding stay cable 2, release the high-strength bolts temporarily connected to the side of the main span until the pre-tightening force is 0, and ensure that the nuts and washers No falling off, temporary reinforcement matching components for dismantling tooling;

S5, after the two tensions of the stay cables of the whole bridge are completed, tighten the high-strength bolts between the main span side steel anchor beam and the steel corbel to completely lock the relative sliding between the steel anchor beam and the steel corbel.

In this embodiment, when the pressure bearing part 317 is hinged to the side pull plate 314 through the hinge shaft, when the steel corbel is poured, an adjustment hole corresponding to the anchor pipe 310 is reserved on the outer wall of the tower column 1, and when the two stay cables are stretched, Firstly, a certain preload tension is preliminarily loaded, and the preload tension should not be greater than one-third of the preset tension. By applying a preload tension to the stay cable 2, the pressure bearing 317 drives the anchor pipe 310 to rotate, Thereby, the angle of the anchor pipe 310 can be precisely avoided, and the guide precision error of the anchor pipe 310 caused by measurement or construction accuracy can be avoided, and then the pressure-bearing part 317 and the two side pull plates 314 can be welded and fixed. In this embodiment, the corresponding anchor pipe 310 One end of the pressure member 317 is welded and fixed to the pressure member 317, and the hole of the anchor pipe 310 on the pre-embedded steel plate 301 of the tower wall is a waist-shaped hole extending longitudinally so that the angle of the anchor pipe 310 can be adjusted.

In an optional embodiment, in step S1, the assembly steps of the steel corbel assembly are:

S100, assembly of steel corbels: first place the first top plate 306 horizontally, draw the vertical and horizontal reference lines; draw the position lines of the web 303 and the second stiffener 305 in sequence according to the vertical and horizontal reference lines, and assemble them in sequence according to the position lines The web 303 and the second stiffener 305 ; then draw the position line of the web 303 on the first bottom plate 302 , and assemble the web 303 and the first bottom plate 302 together according to the position line. S101, pre-embedded steel plate unit assembly: place the tower wall pre-embedded steel plate 301 on the marking platform, draw the vertical and horizontal reference line on the tower wall pre-embedded steel plate 301; according to the vertical and horizontal reference line, draw the pre-embedded side first A stiffening plate 309 and the position line of the reinforcing plate; assemble the first stiffening plate 309 and the reinforcing plate according to the position line. In step S101, before assembly, the shear studs need to be welded to the tower wall pre-embedded steel plate 301, the first stiffener 309 and the reinforcing plate in advance, and some shear studs that affect the welding seam can be assembled in a single unit After welding. The shear studs include: the first shear stud, located on the first stiffened plate 309, and the two are perpendicular; the second shear stud, located on the stiffened plate, and the two are perpendicular; the third shear stud, located on the The tower wall is pre-embedded on the steel plate 301, and the two are perpendicular. S102, draw the positioning line of the steel corbel on the tower wall pre-embedded steel plate 301, and the projection line of the anchor pipe 310 on the tower wall pre-embedded steel plate 301. In step S102, first retest the external dimension deviation of the embedded steel plate 301 in the tower wall, correct the vertical and horizontal baselines when marking, and then use the vertical and horizontal baselines as a reference to find out the assembly position of the top surface of the first top plate 306 as an assembly reference. S103, use a laser measuring instrument to assemble steel corbels, weld the penetration welds between the steel corbels and the pre-embedded steel plate 301 on the tower wall, and then use the post-welding flame to correct the welding deformation. In step S103 , the web plate 303 of the steel corbel, the first top plate 306 and the first bottom plate 302 are respectively welded to the tower wall pre-embedded steel plate 301 . S104, vertically place the pre-embedded steel plate 301 on the tower wall on the steel platform, install and weld the anchor pipe 310 through the projected line of the anchor pipe 310 in cooperation with the projected ground sample.

In an optional embodiment, in step S1, the assembly steps of the steel anchor beam are: S1001, the assembly and positioning of the steel anchor beam partition 313: the second bottom plate 312 is placed flat on the platform, with the width direction of the second bottom plate 312 Draw the longitudinal base line of the second base plate 312 in the center of the second base plate 312, draw the transverse base line of the second base plate 312 and the assembly position line of the inner partition plate 313 with the center of the length direction of the second base plate 312, and assemble the partition plate 313 according to the position line; S1002, steel Anchor beam trough assembly: hoist the two side pull plates 314 into the tire frame, use a jack to tighten the side pull plates 314 and the partition plate 313, and use the jack to fine-tune the lateral position with the side pull plates 314. The outer partition 313 is the port size of the inner formwork to control the steel anchor beam; after the positioning of the groove is completed, the groove is assembled and welded first, and then the groove is fixed by tack welding, and the internal weld of the groove is polished evenly after welding Shun; S1003, Assembling the pressure-bearing plate assembly: hoist the pressure-bearing plate assembly into the groove and assemble it according to the baseline position, and position it on the side pull plate 314 after passing the inspection. S1004, installation of the anchor backing plate 311: install the anchor backing plate 311 separately using a laser measuring instrument, and weld the pressure-bearing part 317 and the anchor backing plate 311 to penetrate the weld. After the main box of the steel anchor beam is completed, the limit plate, the steel plate of the beam base, the stainless steel plate of the base and other parts are welded, and the welding deformation is corrected by flame after welding. S1005, Surface treatment of the second bottom plate 312: In order to control the flatness of the friction surface of the second bottom plate 312 of the steel anchor beam, so that the joint surface of the steel anchor beam and the steel corbel meets the requirements of the design and manufacturing rules, the second bottom plate 312 of the steel anchor beam The friction surface is machined and milled. S1006, steel anchor beam hole making: transfer the steel anchor beam to the scribing platform, draw the vertical and horizontal reference lines with the center line of the second bottom plate 312 of the box body with the second bottom plate 312 facing up, and make steel anchors with the vertical and horizontal reference lines The positioning line of the hole groups at both ends of the beam and the opposite line of the drilled holes of the 314 unit of the side tension plate are checked and passed, and the magnetic drill is used to cooperate with the drilling mold to make the holes. After the inspection is passed, the processing and manufacturing of the steel anchor beam is completed. S1007, Finished product acceptance: In order to ensure that the shape and assembly dimensions of the steel anchor beam meet the acceptance requirements, it is necessary to formulate the accuracy requirements for the semi-finished and finished products of the steel anchor beam. The inspection content mainly includes component marking deviation, structural installation verticality, and straightness Deviation, axis angle deviation of the anchor box cable, deviation between the axis of the 312 hole group on the second bottom plate of the steel anchor beam and the axis of the cable, and the overall structural size deviation. It can be understood that, the above description is only exemplary, and this embodiment of the present application does not limit it.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are within the scope of the pending rights of the present invention. within the scope of protection.

Claims (10)

1. A type A cable-stayed cable anchorage structure for road and rail dual-purpose across the river, characterized in that it comprises a steel anchor beam and a steel corbel assembly, and the two ends of the steel anchor beam are correspondingly supported on two relatively arranged steel bulls between leg assemblies; The steel corbel assembly includes a pre-embedded steel plate unit and a steel corbel; The pre-embedded steel plate unit includes: Pre-embedded steel plates in the tower wall, the pre-embedded steel plates in the tower wall are arranged vertically, and the inner lower part is fixed with the steel corbels; The first stiffening plate is fixed on the outer side of the pre-embedded steel plate of the tower wall, and the first stiffening plate is provided with a first shear nail; Reinforcement plates are fixed horizontally on the outside of the pre-embedded steel plate of the tower wall and are distributed opposite to the steel corbels, and second shear studs are arranged on the reinforcement plates; The third shear stud is fixed on the outer surface of the pre-embedded steel plate of the tower wall; The anchor pipe is provided with an anchor pipe hole corresponding to the anchor pipe on the pre-embedded steel plate of the tower wall, and one end of the anchor pipe passes through the anchor pipe hole and protrudes outside the pre-embedded steel plate of the tower wall, The other end of the anchor pipe points to the anchor backing plate on the steel anchor beam; The steel anchor beam is a box structure, including: the second bottom plate, side tension plate unit, bearing plate assembly and partition; The two side pull plate units are arranged symmetrically along the width direction of the second bottom plate, and a pressure bearing plate assembly is provided on both sides of the second bottom plate in the length direction, and the pressure bearing plate assembly is located inside the two side pull plate units; Located on the upper part of the second bottom plate and between the two side stay plate units, it is used to support the side stay plate units; The second bottom plate is rectangular, the second bottom plate is provided with a first central hole, and the first central hole is a rectangular hole; The side tension plate unit includes a side tension plate and a third stiffening plate, the third stiffening plate is fixed on the outer surface of the side tension plate, and the third stiffening plate and the side tension plate are perpendicular to each other; the third stiffening plate includes a transverse stiffening plate and a vertical stiffening plate There are vertical stiffeners on the upper and lower sides of the transverse stiffeners; There are 3 vertical stiffeners on the upper side of the transverse stiffeners along the length direction of the side tie plates respectively, corresponding to the vertical stiffeners on the lower side of the corresponding transverse stiffeners; The two sides of the partition are tightly matched with the inner surfaces of the two side pull plates; the partition is provided with a second central hole, and the second central hole is a round hole; There are four partitions, two are end partitions, two are internal partitions, one end partition is provided at both ends of the second bottom plate in the length direction, and two internal partitions, two internal partitions located on either side of the first central hole of the second bottom plate; The pressure-bearing plate assembly includes pressure-bearing parts and anchor pads. The pressure-bearing parts are square boxes welded by steel plates. There are hinge shafts corresponding to the hinged side pull plates, the two ends of the pressure-bearing parts are provided with perforations corresponding to the anchor pipes, and the anchor pads are arranged on the upper end surface of the pressure-bearing parts away from the anchor pipes; After the steel anchor beam and steel corbel are hoisted to the tower column, the steel corbel is poured into the hollow cable tower of the tower column, and an adjustment hole corresponding to the anchor tube is reserved on the outer wall of the tower column. The diameter of the adjustment hole is larger than the outer diameter of the anchor tube, and the anchor tube One end of the corresponding pressure-bearing part is welded and fixed to the pressure-bearing part; At least there are anchor pipe holes on the bulkheads at both ends of the steel anchor beam. The diameter of the anchor pipe holes on the diaphragm and the pre-embedded steel plate on the tower wall is larger than the diameter of the anchor pipe so that the angle of the anchor pipe can be adjusted. The tensile force makes the pressure-bearing part drive the anchor pipe to rotate, so that the angle of the anchor pipe is precise, and then the pressure-bearing part is welded and fixed to the two side tension plates. 2. The A-type cable-stayed cable anchorage structure for road-rail dual-purpose across the river according to claim 1, wherein the two steel corbels are symmetrically distributed along the vertical center line of the pre-embedded steel plate in the tower wall; The steel corbels include: web, the web is vertically fixed on one side of the tower wall pre-embedded steel plate corresponding to the steel anchor beam; The first top plate is horizontally fixed on the top of the web, and is correspondingly connected with the pre-embedded steel plate of the tower wall, and a backing plate is provided on the surface of the first top plate, and the steel anchor beam is supported on the backing plate; The first bottom plate is horizontally fixed on the bottom of the web plate and correspondingly connected with the pre-embedded steel plate of the tower wall; The second stiffener is vertically fixed on both sides of the web, its upper end is fixed to the lower surface of the first top plate, and its side is fixed to the side of the web. 3. The A-type cable-stayed cable anchorage structure for road-rail dual-purpose across the river according to claim 2, wherein the reinforcing plate comprises an upper reinforcing plate and a lower reinforcing plate, and the upper reinforcing plate and the The shape, size and height of the first top board correspond to each other; the shape, size and height of the lower reinforcement board correspond to the first bottom board. 4. The A-type cable-stayed cable anchorage structure for highway and railway crossing the river according to claim 3, wherein the first stiffening plate is divided into an upper section and a lower section; The upper part of the first stiffening plate is located on the upper part of the upper reinforcing plate, and its upper and lower ends are respectively flush with the upper end of the pre-embedded steel plate in the tower wall and the upper end surface of the first stiffening plate; The lower section of the first stiffening plate is located between the upper stiffening plate and the lower stiffening plate. 5. A construction method of the A-type cable-stayed cable anchorage structure for road-rail dual-purpose across the river as described in any one of claims 1-4, it is characterized in that, comprises the following steps: S1, assemble the steel anchor beam and steel corbel components respectively, and install the temporary reinforcement matching components for the tooling; S2. Machining the surface of the backing plate for installation between the steel anchor beam and the steel corbel so that the friction coefficient of the backing plate between the steel anchor beam and the steel corbel is ≤0.05; S3, the steel anchor beam and steel corbel components are assembled as a whole, the steel anchor beam at the side span end is connected to the steel corbel with high-strength bolts to form a consolidation state, and the steel anchor beam at the side of the main span and the steel corbel are connected with high-strength bolts to form a consolidated state. Bolts are temporarily consolidated, and the overall structure is formed by temporarily reinforcing matching components; S4, hoist the steel anchor beam and steel corbel as a whole, and pour concrete for the tower column of the corresponding section according to the construction progress; before tensioning the corresponding stay cables, pre-tighten the temporarily consolidated high-strength bolts on the side steel anchor beam of the main span Release the force, and ensure that the nuts and washers do not fall off, and remove the temporary reinforcement matching components for the assembly tooling; S5, after the tensioning of the stay cables of the whole bridge is completed, tighten the high-strength bolts between the main span side steel anchor beam and the steel corbel to completely lock the relative sliding between the steel anchor beam and the steel corbel; When the pressure-bearing parts are hinged to the side tie plate through the hinge shaft, the adjustment hole corresponding to the anchor pipe is reserved on the outer wall of the tower column when the steel corbel is poured. The preloaded tension should not be greater than one-third of the preset tension. By applying the preloaded tension to the stay cable, the pressure-bearing part drives the anchor pipe to rotate, so as to accurately define the angle of the anchor pipe, and then connect the pressure-bearing part with the two A side pull plate is welded and fixed. 6. The construction method of the A-type cable-stayed cable-stayed anchorage structure for road-rail dual-purpose across the river according to claim 5, characterized in that, in step S1, the assembling steps of the steel corbel assembly are: S101, draw vertical and horizontal reference lines on the outside of the pre-embedded steel plate on the tower wall, draw the position line of the first stiffening plate and reinforcing plate on the embedded side according to the vertical and horizontal reference line, and assemble the first stiffening plate and reinforcing plate according to the position line; S102, draw the positioning line of the steel corbel and the projection line of the anchor pipe on the embedded steel plate of the tower wall on the inner side of the embedded steel plate of the tower wall; S103, using a laser measuring instrument to cooperate with assembling the steel corbel, welding the penetration weld between the steel corbel and the pre-embedded steel plate in the tower wall, and then using post-welding flame to correct welding deformation; S104, placing the pre-embedded steel plate on the tower wall vertically on the steel platform, installing and welding the anchor pipe through the projection line of the anchor pipe in cooperation with the projected ground sample. 7. The construction method of the A-type cable-stayed cable-stayed anchorage structure for road-rail dual-purpose crossing the river according to claim 6, characterized in that, in the step S1, the step of assembling the steel corbels comprises: first horizontally placing the first top plate Place and draw the vertical and horizontal reference lines; according to the vertical and horizontal reference lines, draw the position lines of the web and the second stiffener in sequence, assemble the web and the second stiffener in sequence according to the position lines; then draw the web on the first bottom plate The position line of , according to which the web and the first bottom plate are assembled together. 8. The construction method of the A-type cable-stayed cable anchorage structure for road-rail dual-purpose across the river according to claim 7, characterized in that, in step S102, first re-measure the deviation of the external dimensions of the embedded steel plate in the tower wall, and mark When correcting the vertical and horizontal baselines, then use the vertical and horizontal baselines as a reference to find out the assembly position on the top surface of the first top plate as the assembly reference. 9. The construction method of the A-type cable-stayed cable anchorage structure for road-rail crossing the river according to claim 8, characterized in that, in step S103, the web, the first top plate and the first bottom plate of the steel corbel They are respectively welded with the pre-embedded steel plates on the tower wall. 10. The construction method of the A-type cable-stayed cable anchorage structure for highway and railway crossing rivers according to claim 5, characterized in that, in step S101, before assembling, the shear nails are welded to the pre-embedded tower wall in advance For the steel plate, the first stiffening plate and the reinforcing plate, the shear studs that affect the welding seam should be repaired after the unit assembly is completed.

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