Prefabricated box girder steel bar binding jig system and construction method

Abstract

The present invention relates to a precast box girder steel bar binding jig system and a construction method, including steps: installation of the bottom and web steel bar cage binding jig, processing of the steel bar cage hoisting frame, hoisting of the bottom and web steel bar cage, binding of the top plate steel bar cage, hoisting of the top plate steel bar cage, and assembly of the precast box girder steel bar cage. The beneficial effects of the present invention are as follows: the bottom and web steel bar cage binding jig and the top plate steel bar cage binding jig are respectively used for binding the bottom plate steel bar cage, the web steel bar cage, and the top plate steel bar cage, effectively accelerating the construction efficiency of binding the precast box girder steel bar cage; the bottom and web steel bar hoisting brackets and the top plate steel bar hoisting brackets are respectively used to hoist the bottom plate steel bar cage, the web steel bar cage, and the top plate steel bar cage, avoiding extrusion deformation, dislocation, etc. during the hoisting process of the precast box girder steel bar cage, ensuring the construction quality of the precast box girder, and being beneficial to the rapid binding construction of a large number of precast box girder steel bar cages.

Description

Technical Field

[0001] The invention belongs to the field of precast box girder manufacturing, and particularly relates to a precast box girder steel bar binding jig system and a construction method thereof. Background Art

[0002] With the rapid development of China's economy, the transportation industry has advanced by leaps and bounds. At present, whether it is highway, railway or urban interchange bridges in China, precast box girder structures are adopted. Most traditional construction methods use the construction method of precasting in the beam yard + on-site assembly. Among them, the steel bar binding jig for the precast box girder steel cage is the key factor affecting the rapid construction of traditional large-scale precast beam bodies. Traditional jig technologies have problems such as slow binding speed and deformation of the steel cage during hoisting.

[0003] In summary, for the construction of the precast box girder steel bar binding jig system, it is very important to seek a precast box girder steel bar binding jig system and a construction method thereof with fast construction speed, simple operation and reliable quality of the steel cage. Summary of the Invention

[0004] The purpose of the invention is to overcome the deficiencies in the prior art and provide a precast box girder steel bar binding jig system and a construction method thereof.

[0005] This precast box girder steel bar binding jig system includes: a bottom plate steel cage, a web steel cage, a top plate steel cage, a steel cage hoisting frame, a bottom and web steel cage binding jig, a bottom and web steel cage hoisting support, a top plate steel cage hoisting support, and a top plate steel cage binding jig;

[0006] The bottom and web steel cage binding jig includes a square steel base and a web steel bar positioning support. Diagonal rods are symmetrically welded on both sides of the square steel base; insertion pipes are welded on the diagonal rods, and the web steel bar positioning support passes through the insertion pipes and is connected to the longitudinal steel bars of the web steel cage and fixed by adjusting bolts;

[0007] The top plate steel cage binding jig includes a cross beam, a top plate steel cage and a steel bar alignment angle steel. Longitudinal top plate toothed plates are symmetrically arranged on the cross beam; a grooved steel plate is arranged outside the longitudinal top plate toothed plates; the steel bar alignment angle steel and the grooved steel plate are fixed by adjustable screws, and the width of the top plate steel cage matches the position of the steel bar alignment angle steel;

[0008] Lifting ears are provided at the bottom of the steel cage hoisting frame; lifting rings are provided at the tops of both the bottom and web steel cage hoisting support and the top plate steel cage hoisting support; the lifting ears are connected to the lifting rings of the bottom and web steel cage hoisting support or the top plate steel cage hoisting support through pins.

[0009] Preferably, the bottom web reinforcement cage binding jig includes a square steel base, a limiting angle steel, a bottom plate longitudinal tooth plate fixing channel steel, a bottom plate transverse tooth plate, a bottom plate longitudinal tooth plate, an ear plate, an inclined rod, a vertical rod, a bottom plate reinforcement cage, a reinforcing rib, an insertion pipe, a web reinforcement positioning bracket, a web tooth groove angle steel, a web reinforcement cage, and an adjusting bolt. A bottom plate longitudinal tooth plate fixing channel steel is welded in the middle of the square steel base, and a bottom plate transverse tooth plate is welded on the upper part of the bottom plate longitudinal tooth plate fixing channel steel; an ear plate is welded on the square steel base, and the ear plate is fixed to the bottom plate transverse tooth plate by bolts; inclined rods and vertical rods are symmetrically welded on both sides of the square steel base, a limiting angle steel for limiting the bottom web reinforcement cage is welded on the inner side of the bottom of the inclined rod, and a web tooth groove angle steel is arranged at the top of the inclined rod; a channel steel is welded on the inclined rod, and an insertion pipe is welded on the channel steel, and an adjusting bolt is arranged on the insertion pipe; the web reinforcement positioning bracket is inserted into the insertion pipe, the web reinforcement positioning bracket is placed on the longitudinal reinforcement of the web reinforcement cage, and the web reinforcement positioning bracket is telescopically fixed by the adjusting bolt; a reinforcing rib is arranged at the connecting part of the bottom plate reinforcement cage and the web reinforcement cage.

[0010] Preferably, the top plate reinforcement cage binding jig includes a support, a grooved steel plate, a top plate transverse tooth plate, a cross beam, a top plate longitudinal tooth plate, a top plate reinforcement cage, a transverse stirrup top height angle steel, a steel bar alignment angle steel, a fixed position longitudinal rod, and an adjustable screw rod. A support is arranged below the cross beam; a top plate transverse tooth plate is arranged in the middle of the cross beam, and transverse stirrup top height angle steels are arranged on both sides of the top plate transverse tooth plate; a top plate longitudinal tooth plate is arranged outside the transverse stirrup top height angle steel; a fixed position longitudinal rod is arranged outside the top plate longitudinal tooth plate, and a grooved steel plate is arranged between the fixed position longitudinal rod and the top plate longitudinal tooth plate; the steel bar alignment angle steel is fixed to the grooved steel plate by the adjustable screw rod, and the width of the top plate reinforcement cage changes with the position of the adjusted steel bar alignment angle steel.

[0011] Preferably, the reinforcement cage hoisting frame includes a square steel upper longitudinal beam, a square steel lower longitudinal beam, a hoisting frame cross bar, and a chord rod. The square steel upper longitudinal beam and the square steel lower longitudinal beam are connected by the chord rod, the square steel lower longitudinal beams are connected by the hoisting frame cross bar, a hoisting frame lifting ring is arranged on the square steel upper longitudinal beam, and a lifting lug is arranged below the hoisting frame cross bar.

[0012] Preferably, the bottom web reinforcement cage hoisting support is provided with a bottom web reinforcement cage hoisting U-shaped support. The bottom web reinforcement cage hoisting U-shaped support includes a square steel and a lifting ring. The bottom web reinforcement cage hoisting support is connected to the lifting lug of the reinforcement cage hoisting frame by a pin. The bottom web reinforcement cage and the bottom web reinforcement cage hoisting U-shaped support are fixed together by steel bar binding or U-shaped screw rods; the top plate reinforcement cage hoisting support includes a square steel, a lifting ring is welded on the square steel, and a detachable bottom support rod is connected to the lower part of the top plate reinforcement cage hoisting support by an anti-drop pin to form an integral body; when the top plate reinforcement cage is placed in the top plate reinforcement cage hoisting support, the detachable bottom support rod is inserted into the bottom of the top plate reinforcement cage to form a bottom support; the top plate reinforcement cage hoisting support is connected to the lifting lug of the reinforcement cage hoisting frame by a pin.

[0013] The construction method of this precast box girder steel bar binding jig system includes the following steps:

[0014] Step 1: Installation of the bottom and web steel bar cage binding jig: Install the bottom and web steel bar cage binding jig, and bind the bottom steel bar cage and the web steel bar cage through the bottom and web steel bar cage binding jig;

[0015] Step 2: Processing of the steel bar cage lifting frame: Assemble the steel bar cage lifting frame, set lifting frame lifting rings on the upper longitudinal beam of the square steel, and set lifting ears at the lower part of the cross bar of the lifting frame;

[0016] Step 3: Lifting of the bottom and web steel bar cages: Place the bottom steel bar cage and the web steel bar cage on the U-shaped support for lifting the bottom and web steel bar cages, and lift them integrally with the steel bar cage lifting frame;

[0017] Step 4: Binding of the top steel bar cage: Install the top steel bar cage binding jig, control the width of the top steel bar cage by adjusting the position of the steel bar alignment angle steel; Bind the top steel bar cage;

[0018] Step 5: Lifting of the top steel bar cage: Place the top steel bar cage lifting support on the upper part of the top steel bar cage, insert the detachable bottom support rod into the bottom of the top steel bar cage to hold it up; And lift it integrally with the steel bar cage lifting frame;

[0019] Step 6: Assembly of the precast box girder steel bar cage: Place the top steel bar cage on the upper part of the bottom steel bar cage and the web steel bar cage, and bind and assemble them.

[0020] Preferably, in Step 1: Weld the bottom longitudinal tooth plate fixing channel steel in the middle of the square steel base, and weld the bottom transverse tooth plate on the upper part of the bottom longitudinal tooth plate fixing channel steel; Weld ear plates at the designed positions of the square steel base, and fix the ear plates and the bottom transverse tooth plate with bolts; Weld diagonal rods and vertical rods in a cross-bracing manner on both sides of the square steel base, weld limit angle steel on the inner side of the bottom of the diagonal rods, use the limit angle steel to limit the bottom and web steel bar cages, and set web tooth groove angle steel at the top of the diagonal rods; Weld channel steel at the designed positions of the diagonal rods, weld insertion pipes on the channel steel, and set adjusting bolts on the insertion pipes; Insert the web steel bar positioning bracket into the insertion pipe, position the longitudinal steel bars of the web steel bar cage through the web steel bar positioning bracket, and fix the web steel bar positioning bracket through the adjusting bolts after adjusting its length according to the width of the web steel bar cage; Set reinforcement bars at the connection part of the bottom steel bar cage and the web steel bar cage.

[0021] Preferably, step four is specifically as follows: Install the binding jig for the top plate steel reinforcement cage, where a support is arranged below the cross beam; a transverse tooth plate for the top plate is arranged in the middle of the cross beam, and transverse stirrup top height angle steels are arranged on both sides of the transverse tooth plate for the top plate; longitudinal tooth plates for the top plate are arranged outside the transverse stirrup top height angle steels; a fixed position longitudinal rod is arranged outside the longitudinal tooth plate for the top plate, and a grooved steel plate is arranged between the fixed position longitudinal rod and the longitudinal tooth plate for the top plate; the width of the top plate steel reinforcement cage is controlled by adjusting the position of the steel bar alignment angle steel, and the steel bar alignment angle steel and the grooved steel plate are fixed by an adjustable screw rod; then bind the top plate steel reinforcement cage.

[0022] Preferably, step five is specifically as follows: After the binding of the top plate steel reinforcement cage is completed, place the part of the hoisting support for the top plate steel reinforcement cage except the detachable bottom support rod on the upper part of the top plate steel reinforcement cage, install the detachable bottom support rod, where the detachable bottom support rod is inserted into the bottom of the top plate steel reinforcement cage for bottom support; connect the lifting lugs of the hoisting support for the top plate steel reinforcement cage and the steel reinforcement cage hoisting frame by a pin, and hoist the steel reinforcement cage hoisting frame and the hoisting support for the top plate steel reinforcement cage as a whole by a crane.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1) The present invention adopts a new precast box girder steel reinforcement binding jig system. The binding jigs for the bottom and web steel reinforcement cages and the binding jig for the top plate steel reinforcement cage are respectively used to bind the bottom plate steel reinforcement cage, the web steel reinforcement cage and the top plate steel reinforcement cage, effectively accelerating the construction efficiency of binding the precast box girder steel reinforcement cage.

[0025] 2) The present invention uses the hoisting supports for the bottom and web steel reinforcements and the hoisting support for the top plate steel reinforcement to hoist the bottom plate steel reinforcement cage, the web steel reinforcement cage and the top plate steel reinforcement cage respectively, avoiding the extrusion deformation, dislocation, etc. during the hoisting process of the precast box girder steel reinforcement cage, ensuring the construction quality of the precast box girder, being conducive to the rapid binding construction of the precast box girder steel reinforcement cage on a large scale, and achieving good technical and economic benefits when applied to actual projects. Description of the Drawings

[0026] Figure 1 is the large-scale sectional view of the binding jig for the bottom and web steel reinforcement cages;

[0027] Figure 2 is the side elevation view of the binding jig for the bottom and web steel reinforcement cages;

[0028] Figure 3 is the plan view of the binding jig for the bottom and web steel reinforcement cages;

[0029] Figure 4 is the sectional view of the binding jig for the bottom and web steel reinforcement cages;

[0030] Figure 5 is the plan view of the binding jig for the bottom and web steel reinforcement cages;

[0031] Figure 6 is the large-scale sectional view of the longitudinal tooth plate for the top plate;

[0032] Figure 7 It is a plan schematic diagram of the steel reinforcement cage hoisting frame;

[0033] Figure 8 It is a side elevation schematic diagram of the steel reinforcement cage hoisting frame;

[0034] Figure 9 It is a sectional schematic diagram of the installation of the bottom and web steel reinforcement cage hoisting support;

[0035] Figure 10 It is a large-scale schematic diagram of the bottom and web steel reinforcement cage hoisting support;

[0036] Figure 11 It is a sectional schematic diagram of the installation of the top plate steel reinforcement cage hoisting support;

[0037] Figure 12 It is a large-scale schematic diagram of the top plate steel reinforcement cage hoisting support;

[0038] Figure 13 It is a construction process flow chart of the present invention.

[0039] In the figure: 1 - square steel base, 2 - limiting angle steel, 3 - bottom plate longitudinal tooth plate fixing channel steel, 4 - bottom plate transverse tooth plate, 5 - bottom plate longitudinal tooth plate, 6 - ear plate, 7 - diagonal bar, 8 - vertical bar, 9 - bottom plate steel reinforcement cage, 10 - reinforcing rib, 11 - insertion pipe, 12 - web steel bar positioning support, 13 - web tooth groove angle steel, 14 - web steel reinforcement cage, 15 - adjusting bolt, 16 - support, 17 - grooved steel plate, 18 - top plate transverse tooth plate, 19 - cross beam, 20 - top plate longitudinal tooth plate, 21 - top plate steel reinforcement cage, 22 - transverse stirrup top height angle steel, 23 - steel bar alignment angle steel, 24 - fixed position longitudinal bar, 25 - adjustable screw rod, 26 - upper longitudinal beam of square steel, 27 - lower longitudinal beam of square steel, 28 - steel reinforcement cage hoisting frame, 29 - hoisting frame cross bar, 30 - chord, 31 - ear plate, 32 - bolt pin, 33 - bottom and web steel reinforcement cage hoisting support, 34 - bottom and web steel reinforcement cage hoisting U-shaped support, 35 - square steel, 36 - lifting ring, 37 - anti-drop pin, 38 - top plate steel reinforcement cage hoisting support, 39 - bottom supporting rod. Specific embodiments

[0040] The following further describes the present invention in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0041] Embodiment 1

[0042] As an embodiment, as Figures 1 to 12As shown in the figure, the precast box girder steel bar binding jig system is characterized by comprising: square steel base 1, limiting angle steel 2, bottom plate longitudinal tooth plate fixing channel steel 3, bottom plate transverse tooth plate 4, bottom plate longitudinal tooth plate 5, ear plate 6, inclined rod 7, vertical rod 8, bottom plate steel bar cage 9, reinforcing rib 10, insertion pipe 11, web steel bar positioning bracket 12, web tooth groove angle steel 13, web steel bar cage 14, adjusting bolt 15, support 16, grooved steel plate 17, top plate transverse tooth plate 18, cross beam 19, top plate longitudinal tooth plate 20, top plate steel bar cage 21, transverse stirrup top height angle steel 22, steel bar alignment angle steel 23, fixed position longitudinal rod 24, adjustable screw rod 25, upper longitudinal square steel beam 26, lower longitudinal square steel beam 27, steel bar cage hoisting frame 28, hoisting frame cross bar 29, chord rod 30, ear plate 31, pin 32, bottom and web steel bar cage hoisting bracket 33, bottom and web steel bar cage hoisting U-shaped bracket 34, square steel 35, lifting ring 36, anti-drop pin 37, top plate steel bar cage hoisting bracket 38, bottom support rod 39; the precast box girder steel bar binding jig system adopts a bottom and web steel bar cage binding jig; the bottom and web steel bar cage hoisting bracket comprises a bottom protection and a temporary internal support bracket anti-deformation structure; the top plate steel bar cage hoisting bracket 38 adopts a bottom protection and anti-deformation protection structure.

[0043] The bottom and web steel bar cage binding jig comprises a square steel base 1 and a web steel bar positioning bracket 12, and inclined rods 7 are symmetrically welded on both sides of the square steel base 1; insertion pipes 11 are welded on the inclined rods 7, and the web steel bar positioning bracket 12 passes through the insertion pipes 11 and is connected to the longitudinal steel bars of the web steel bar cage 14 and fixed by an adjusting bolt 15;

[0044] The top plate steel bar cage binding jig comprises a cross beam 19, a top plate steel bar cage 21 and a steel bar alignment angle steel 23, and top plate longitudinal tooth plates 20 are symmetrically arranged on the cross beam 1; a grooved steel plate 17 is arranged outside the top plate longitudinal tooth plates 20; the steel bar alignment angle steel 23 and the grooved steel plate 17 are fixed by an adjustable screw rod 25, and the width of the top plate steel bar cage 21 matches the position of the steel bar alignment angle steel 23;

[0045] A lifting ear 31 is arranged at the bottom of the steel bar cage hoisting frame 28; lifting rings 36 are arranged at the tops of both the bottom and web steel bar cage hoisting bracket 33 and the top plate steel bar cage hoisting bracket 38; the lifting ear 31 is connected to the lifting ring 36 of the bottom and web steel bar cage hoisting bracket 33 or the top plate steel bar cage hoisting bracket 38 through a pin 32.

[0046] The described bottom web steel cage binding jig is composed of a square steel base 1, a limiting angle steel 2, a bottom plate longitudinal tooth plate fixing channel steel 3, a bottom plate transverse tooth plate 4, a bottom plate longitudinal tooth plate 5, an ear plate 6, an inclined rod 7, a vertical rod 8, a bottom plate steel cage 9, a reinforcing rib 10, an insertion pipe 11, a web steel bar positioning bracket 12, a web tooth groove angle steel 13, a web steel cage 14, an adjusting bolt 15, etc. The relevant components are all processed in the factory. Among them, the bottom plate longitudinal tooth plate fixing channel steel 3 is welded in the middle of the square steel base 1, and the bottom plate transverse tooth plate 4 is welded on the upper part of the bottom plate longitudinal tooth plate fixing channel steel 3; the ear plate 6 is welded at the designed position of the square steel base 1, and the ear plate 6 is bolted to the bottom plate transverse tooth plate 4; the inclined rod 7 and the vertical rod 8 are welded in a cross-bracing manner on both sides of the square steel base 1. The limiting angle steel 2 is welded on the inner side of the bottom of the inclined rod 7, and the limiting angle steel 2 limits the bottom web steel cage. The web tooth groove angle steel 13 is arranged at the top of the inclined rod 7; a channel steel is welded at the designed position of the inclined rod 7, and the insertion pipe 11 is welded on the channel steel. Among them, the adjusting bolt 15 is arranged on the insertion pipe 11; the web steel bar positioning bracket 12 is inserted into the insertion pipe 11. The web steel bar positioning bracket 12 positions the longitudinal steel bars of the web steel cage 14 and can be placed thereon. The web steel bar positioning bracket 12 can be telescopically adjusted and fixed by the adjusting bolt 15; the reinforcing rib 10 is arranged at the connecting part of the bottom plate steel cage 9 and the web steel cage 14;

[0047] The described top plate steel cage binding jig is composed of a support 16, a grooved steel plate 17, a top plate transverse tooth plate 18, a cross beam 19, a top plate longitudinal tooth plate 20, a top plate steel cage 21, a transverse stirrup top height angle steel 22, a steel bar alignment angle steel 23, a fixed position longitudinal rod 24, an adjustable screw rod 25, etc. The relevant components are all processed in the factory. Among them, the support 16 is arranged under the cross beam 19; the top plate transverse tooth plate 18 is arranged in the middle of the cross beam 19, and the transverse stirrup top height angle steel 22 is arranged on both sides of the top plate transverse tooth plate 18; the top plate longitudinal tooth plate 20 is arranged outside the transverse stirrup top height angle steel 22; the fixed position longitudinal rod 24 is arranged outside the top plate longitudinal tooth plate 20, and the grooved steel plate 17 is arranged between the fixed position longitudinal rod 24 and the top plate longitudinal tooth plate 20; the steel bar alignment angle steel 23 is fixed to the grooved steel plate 17 by the adjustable screw rod 25, and the width of the top plate steel cage 21 can be controlled by adjusting the position of the steel bar alignment angle steel 23;

[0048] The described steel cage hoisting frame 28 is composed of a square steel upper longitudinal beam 26, a square steel lower longitudinal beam 27, a steel cage hoisting frame 28, a hanger cross bar 29, chord members 30, etc. The relevant components are all processed in the factory. Among them, the square steel upper longitudinal beam 26 and the square steel lower longitudinal beam 27 are connected by the chord members 30, and the square steel lower longitudinal beams 27 are connected by the hanger cross bar 29. A hoisting frame lifting ring is arranged on the square steel upper longitudinal beam 26, and a lifting lug 31 is arranged at the lower part of the hanger cross bar 29; the bottom and web steel cage hoisting support 33 adopts a bottom and web steel cage hoisting U-shaped support 34, which is welded by square steel 35 and is provided with a lifting ring 36. The bottom and web steel cage hoisting support 33 is connected to the lifting lug 31 of the steel cage hoisting frame 28 through a pin 32. The bottom and web steel cage and the bottom and web steel cage hoisting U-shaped support 34 are fixed together by steel bar binding or U-shaped screw rods, which can effectively carry out bottom protection. The bottom and web steel cage hoisting U-shaped support 34 can also be used as a temporary internal support to prevent deformation. The steel cage hoisting frame 28 and the bottom and web steel cage hoisting support 33 are hoisted integrally by a crane; the top plate steel cage hoisting support 38 is welded by square steel 35, and a lifting ring 36 is welded on the square steel 35. A detachable bottom support rod 39 is arranged at the lower part of the top plate steel cage hoisting support 38 and is fixed into a whole through an anti-detachment pin 37; after the top plate steel cage 21 is bound, the top plate steel cage hoisting support 38 is placed on the upper part of the top plate steel cage 21, and the detachable bottom support rod 39 is installed. Among them, the detachable bottom support rod 39 is inserted into the bottom of the top plate steel cage 21 for bottom protection; the top plate steel cage hoisting support 38 is connected to the lifting lug 31 of the steel cage hoisting frame 28 through a pin 32, and the steel cage hoisting frame 28 and the top plate steel cage hoisting support 38 are hoisted integrally by a crane.

[0049] Embodiment 2

[0050] As another embodiment, the construction method of the precast box girder steel bar binding jig system described in Embodiment 1 is as Figure 13 shown, and its main construction steps are as follows:

[0051] Step 1. Construction preparation:

[0052] Carry out the drawing design of the precast box girder steel bar binding jig system and the training of relevant technical personnel, etc.;

[0053] Installation of the bottom and web steel cage binding jig:

[0054] All components of the bottom and web reinforcement cage binding jig are processed in the factory. Among them, longitudinal bottom plate tooth plates fixing channels 3 are welded in the middle of the square steel base 1, and transverse bottom plate tooth plates 4 are welded above the longitudinal bottom plate tooth plates fixing channels 3; ear plates 6 are welded at the designed positions of the square steel base 1, and the ear plates 6 are bolt-fixed to the transverse bottom plate tooth plates 4; diagonal rods 7 and vertical rods 8 are welded on both sides of the square steel base 1. Inside the bottom of the diagonal rod 7, a limiting angle steel 2 is welded, and the limiting angle steel 2 limits the bottom and web reinforcement cage. A web tooth groove angle steel 13 is arranged at the top of the diagonal rod 7; channels are welded at the designed positions of the diagonal rod 7, and inserting pipes 11 are welded on the channels, and adjusting bolts 15 are arranged on the inserting pipes 11; the web reinforcement positioning bracket 12 is inserted into the inserting pipe 11. The web reinforcement positioning bracket 12 positions the longitudinal reinforcement of the web reinforcement cage 14 and can be placed thereon. The web reinforcement positioning bracket 12 can be telescopically adjusted and fixed by the adjusting bolt 15; reinforcing ribs 10 are arranged at the connecting part of the bottom plate reinforcement cage 9 and the web reinforcement cage 14;

[0055] Binding of bottom and web reinforcement cages:

[0056] After the installation of the bottom and web reinforcement cage binding jig is completed, the bottom plate reinforcement cage 9 and the web reinforcement cage 14 are quickly bound through the jig;

[0057] Step 2. Processing of the reinforcement cage hoisting frame:

[0058] The reinforcement cage hoisting frame 28 is composed of a square steel upper longitudinal beam 26, a square steel lower longitudinal beam 27, a reinforcement cage hoisting frame 28, a hanging frame cross bar 29, chord members 30, etc. All relevant components are processed in the factory. Among them, the square steel upper longitudinal beam 26 and the square steel lower longitudinal beam 27 are connected by the chord members 30, the square steel lower longitudinal beams 27 are connected by the hanging frame cross bar 29, lifting rings are arranged on the square steel upper longitudinal beam 26, and lifting lugs 31 are arranged below the hanging frame cross bar 29;

[0059] Hoisting of bottom and web reinforcement cages:

[0060] The bottom and web reinforcement cage hoisting bracket 33 adopts a bottom and web reinforcement cage hoisting U-shaped bracket 34. The bottom and web reinforcement cage hoisting U-shaped bracket 34 is welded by square steel 35 and is provided with a lifting ring 36. The bottom and web reinforcement cage hoisting bracket 33 is connected to the lifting lug 31 of the reinforcement cage hoisting frame 28 through a pin 32. The bottom and web reinforcement cage and the bottom and web reinforcement cage hoisting U-shaped bracket 34 are fixed together by steel bar binding or U-shaped screw rods, which can effectively provide bottom protection. The bottom and web reinforcement cage hoisting U-shaped bracket 34 can also be used as a temporary internal support bracket to prevent deformation. The reinforcement cage hoisting frame 28 and the bottom and web reinforcement cage hoisting bracket 33 are integrally hoisted by a crane;

[0061] Step 3. Installation of the top plate reinforcement cage binding jig:

[0062] The top plate reinforcement cage binding jig is composed of a support 16, a grooved steel plate 17, a top plate transverse toothed plate 18, a cross beam 19, a top plate longitudinal toothed plate 20, a top plate reinforcement cage 21, a transverse stirrup top height angle steel 22, a steel bar alignment angle steel 23, a fixed position longitudinal rod 24, an adjustable screw rod 25, etc. All relevant components are processed in the factory. Among them, the support 16 is arranged under the cross beam 19; the top plate transverse toothed plate 18 is arranged in the middle of the cross beam 19, and the transverse stirrup top height angle steels 22 are arranged on both sides of the top plate transverse toothed plate 18; the top plate longitudinal toothed plate 20 is arranged outside the transverse stirrup top height angle steel 22; the fixed position longitudinal rod 24 is arranged outside the top plate longitudinal toothed plate 20, and the grooved steel plate 17 is arranged between the fixed position longitudinal rod 24 and the top plate longitudinal toothed plate 20; the steel bar alignment angle steel 23 and the grooved steel plate 17 are fixed by the adjustable screw rod 25, and the width of the top plate reinforcement cage 21 can be controlled by adjusting the position of the steel bar alignment angle steel 23;

[0063] Step Four: Binding of the top plate reinforcement cage

[0064] After the installation of the top plate reinforcement cage binding jig is completed, quickly bind the top plate reinforcement cage 21;

[0065] Step Five: Hoisting of the top plate reinforcement cage

[0066] The top plate reinforcement cage hoisting bracket 38 is welded by square steel 35. A lifting ring 36 is welded on the square steel 35. The detachable bottom support rod 39 is arranged under the top plate reinforcement cage hoisting bracket 38 and fixed as a whole through an anti-dropping bolt 37; after the binding of the top plate reinforcement cage 21 is completed, place the top plate reinforcement cage hoisting bracket 38 on the upper part of the top plate reinforcement cage 21 and install the detachable bottom support rod 39, where the detachable bottom support rod 39 is inserted into the bottom of the top plate reinforcement cage 21 for bottom support; the lifting ear 31 of the top plate reinforcement cage hoisting bracket 38 and the reinforcement cage hoisting frame 28 are connected by a bolt 32, and the reinforcement cage hoisting frame 28 and the top plate reinforcement cage hoisting bracket 38 are hoisted as a whole by a crane.

[0067] Step Six: Assembly of the precast box girder reinforcement cage

[0068] After the binding of the bottom and web reinforcement cages and the top plate reinforcement cage 21 is completed, hoist the top plate reinforcement cage 21 and the bottom and web reinforcement cages through the top plate reinforcement cage hoisting bracket 38 and the bottom and web reinforcement cage hoisting bracket 33, place the top plate reinforcement cage 21 on the upper part of the bottom and web reinforcement cages, and carry out binding.

Claims

1. A precast box girder steel bar binding jig system, characterized in that, Including: Bottom slab reinforcement cage (9), web reinforcement cage (14), top slab reinforcement cage (21), reinforcement cage lifting frame (28), bottom and web reinforcement cage binding jig, bottom and web reinforcement cage lifting support (33), top slab reinforcement cage lifting support (38), top slab reinforcement cage binding jig; The bottom and web reinforcement cage binding jig includes a square steel base (1) and a web reinforcement positioning support (12). Diagonal bars (7) are symmetrically welded on both sides of the square steel base (1); insertion pipes (11) are welded on the diagonal bars (7), and the web reinforcement positioning support (12) passes through the insertion pipes (11) and is connected to the longitudinal reinforcement of the web reinforcement cage (14) and fixed by adjusting bolts (15); The top slab reinforcement cage binding jig includes a cross beam (19), a top slab reinforcement cage (21), and a steel angle for aligning reinforcement bars (23). Top slab longitudinal toothed plates (20) are symmetrically arranged on the cross beam (19); a grooved steel plate (17) is arranged outside the top slab longitudinal toothed plates (20); the steel angle for aligning reinforcement bars (23) is fixed to the grooved steel plate (17) by an adjustable screw rod (25), and the width of the top slab reinforcement cage (21) matches the position of the steel angle for aligning reinforcement bars (23); The bottom of the reinforcement cage lifting frame (28) is provided with a lifting lug (31); lifting rings (36) are provided at the tops of both the bottom and web reinforcement cage lifting support (33) and the top slab reinforcement cage lifting support (38); the lifting lug (31) is connected to the lifting ring (36) of the bottom and web reinforcement cage lifting support (33) or the top slab reinforcement cage lifting support (38) through a pin (32); The bottom and web reinforcement cage binding jig includes a square steel base (1), a limiting steel angle (2), a bottom slab longitudinal toothed plate fixing channel steel (3), a bottom slab transverse toothed plate (4), a bottom slab longitudinal toothed plate (5), an ear plate (6), a diagonal bar (7), a vertical bar (8), a bottom slab reinforcement cage (9), a reinforcing rib (10), an insertion pipe (11), a web reinforcement positioning support (12), a web toothed groove steel angle (13), a web reinforcement cage (14), and an adjusting bolt (15). A bottom slab longitudinal toothed plate fixing channel steel (3) is welded in the middle of the square steel base (1), and a bottom slab transverse toothed plate (4) is welded on the upper part of the bottom slab longitudinal toothed plate fixing channel steel (3); an ear plate (6) is welded on the square steel base (1), and the ear plate (6) is fixed to the bottom slab transverse toothed plate (4) by a bolt; diagonal bars (7) and vertical bars (8) are symmetrically welded on both sides of the square steel base (1). A limiting steel angle (2) for limiting the bottom and web reinforcement cage is welded on the inner side of the bottom of the diagonal bar (7), and a web toothed groove steel angle (13) is provided at the top of the diagonal bar (7); a channel steel is welded on the diagonal bar (7), and an insertion pipe (11) is welded on the channel steel, and an adjusting bolt (15) is arranged on the insertion pipe (11); the web reinforcement positioning support (12) is inserted into the insertion pipe (11), the web reinforcement positioning support (12) is placed on the longitudinal reinforcement of the web reinforcement cage (14), and the web reinforcement positioning support (12) is telescopically fixed by the adjusting bolt (15); a reinforcing rib (10) is arranged at the connecting part of the bottom slab reinforcement cage (9) and the web reinforcement cage (14); The described steel cage hoisting frame (28) includes a square steel upper longitudinal beam (26), a square steel lower longitudinal beam (27), a hoisting frame cross bar (29) and chord bars (30). Among them, the square steel upper longitudinal beam (26) and the square steel lower longitudinal beam (27) are connected by the chord bars (30), and the square steel lower longitudinal beams (27) are connected by the hoisting frame cross bar (29). A hoisting frame lifting ring is arranged on the square steel upper longitudinal beam (26), and a lifting lug (31) is arranged at the lower part of the hoisting frame cross bar (29). The described bottom and web steel cage hoisting support (33) is provided with a bottom and web steel cage hoisting U-shaped support (34). The bottom and web steel cage hoisting U-shaped support (34) includes a square steel (35) and a lifting ring (36). The bottom and web steel cage hoisting support (33) is connected with the lifting lug (31) of the steel cage hoisting frame (28) through a pin (32). The bottom and web steel cage and the bottom and web steel cage hoisting U-shaped support (34) are fixed together by steel bar binding or U-shaped screw rods. The described top plate steel cage hoisting support (38) includes a square steel (35), and a lifting ring (36) is welded on the square steel (35). The lower part of the top plate steel cage hoisting support (38) is connected with a detachable bottom support rod (39) through an anti-dropping pin (37) to form an integral body. When the top plate steel cage (21) is placed into the top plate steel cage hoisting support (38), the detachable bottom support rod (39) is inserted into the bottom of the top plate steel cage (21) to form a bottom support. The top plate steel cage hoisting support (38) is connected with the lifting lug (31) of the steel cage hoisting frame (28) through a pin (32).

2. The precast box girder steel bar binding jig system according to claim 1, characterized in that The described top plate steel cage binding jig includes a support (16), a grooved steel plate (17), a top plate transverse toothed plate (18), a cross beam (19), a top plate longitudinal toothed plate (20), a top plate steel cage (21), a transverse stirrup top height angle steel (22), a steel bar alignment angle steel (23), a fixed position longitudinal rod (24) and an adjustable screw rod (25). Among them, supports (16) are arranged at the lower part of the cross beam (19); a top plate transverse toothed plate (18) is arranged in the middle of the cross beam (19), and transverse stirrup top height angle steels (22) are arranged on both sides of the top plate transverse toothed plate (18); top plate longitudinal toothed plates (20) are arranged outside the transverse stirrup top height angle steels (22); a fixed position longitudinal rod (24) is arranged outside the top plate longitudinal toothed plates (20), and a grooved steel plate (17) is arranged between the fixed position longitudinal rod (24) and the top plate longitudinal toothed plates (20); the steel bar alignment angle steel (23) and the grooved steel plate (17) are fixed through the adjustable screw rod (25), and the width of the top plate steel cage (21) changes with the change of the position of the steel bar alignment angle steel (23).

3. The construction method of the precast box girder steel bar binding jig system according to any one of claims 1 to 2, characterized in that, It includes the following steps: Step 1: Installation of the bottom and web steel cage binding jig: Install the bottom and web steel cage binding jig, and bind the bottom plate steel cage (9) and the web steel cage (14) through the bottom and web steel cage binding jig. Step 2: Processing of the steel cage hoisting frame: Assemble the steel cage hoisting frame (28), arrange a hoisting frame lifting ring on the square steel upper longitudinal beam (26), and arrange a lifting lug (31) at the lower part of the hoisting frame cross bar (29). Step 3. Hoisting of the bottom and web reinforcement cages: The bottom slab reinforcement cage (9) and the web reinforcement cage (14) are placed on the U-shaped support (34) for hoisting the bottom and web reinforcement cages, and are hoisted integrally with the reinforcement cage hoisting frame (28). Step 4. Binding of the top slab reinforcement cage: Install the binding jig for the top slab reinforcement cage, and control the width of the top slab reinforcement cage (21) by adjusting the position of the steel bar alignment angle steel (23); bind the top slab reinforcement cage (21). Step 5. Hoisting of the top slab reinforcement cage: Place the hoisting support (38) for the top slab reinforcement cage on the upper part of the top slab reinforcement cage (21), insert the detachable bottom-supporting rod (39) into the bottom of the top slab reinforcement cage (21) for bottom support; and hoist it integrally with the reinforcement cage hoisting frame (28). Step 6. Assembly of the precast box girder reinforcement cage: Place the top slab reinforcement cage (21) on the upper part of the bottom slab reinforcement cage (9) and the web reinforcement cage (14), and bind and assemble them.

4. The construction method of the precast box girder steel bar binding jig system according to claim 3, characterized in that, In Step 1: A bottom longitudinal tooth plate fixing channel steel (3) is welded to the middle of the square steel base (1), and a bottom transverse tooth plate (4) is welded to the upper part of the bottom longitudinal tooth plate fixing channel steel (3); ear plates (6) are welded at the designed positions of the square steel base (1), and the ear plates (6) are bolt-fixed to the bottom transverse tooth plate (4); diagonal rods (7) and vertical rods (8) are welded in a cross-bracing manner on both sides of the square steel base (1), a limit angle steel (2) is welded to the inner side of the bottom of the diagonal rod (7), the limit angle steel (2) limits the bottom and web reinforcement cages, and a web tooth groove angle steel (13) is arranged at the top of the diagonal rod (7); a channel steel is welded at the designed position of the diagonal rod (7), and an insertion pipe (11) is welded on the channel steel, and an adjusting bolt (15) is arranged on the insertion pipe (11); the web steel bar positioning bracket (12) is inserted into the insertion pipe (11), the longitudinal steel bar position of the web reinforcement cage (14) is positioned through the web steel bar positioning bracket (12), and after the web steel bar positioning bracket (12) is adjusted in length according to the width of the web reinforcement cage (14), it is fixed through the adjusting bolt (15); a reinforcing rib (10) is arranged at the connecting part of the bottom slab reinforcement cage (9) and the web reinforcement cage (14).

5. The construction method of the precast box girder steel bar binding jig system according to claim 3, characterized in that, Specifically, Step 4 is as follows: Install the binding jig for the top slab reinforcement cage, where a support (16) is arranged under the cross beam (19); a top transverse tooth plate (18) is arranged in the middle of the cross beam (19), and transverse stirrup top height angle steels (22) are arranged on both sides of the top transverse tooth plate (18); a top longitudinal tooth plate (20) is arranged outside the transverse stirrup top height angle steel (22); a fixed-position longitudinal rod (24) is arranged outside the top longitudinal tooth plate (20), and a grooved steel plate (17) is arranged between the fixed-position longitudinal rod (24) and the top longitudinal tooth plate (20); the width of the top slab reinforcement cage (21) is controlled by adjusting the position of the steel bar alignment angle steel (23), and the steel bar alignment angle steel (23) is fixed to the grooved steel plate (17) through an adjustable screw rod (25); bind the top slab reinforcement cage (21).

6. The construction method of the precast box girder steel bar binding jig system according to claim 3, characterized in that Step 5 is specifically as follows: After the top plate reinforcement cage (21) is tied up, place the part of the top plate reinforcement cage hoisting bracket (38) except the detachable bottom support rod (39) on the upper part of the top plate reinforcement cage (21), and install the detachable bottom support rod (39), wherein the detachable bottom support rod (39) is inserted into the bottom of the top plate reinforcement cage (21) for bottom support; connect the lifting lug (31) of the top plate reinforcement cage hoisting bracket (38) and the reinforcement cage hoisting frame (28) through a pin (32), and hoist the reinforcement cage hoisting frame (28) and the top plate reinforcement cage hoisting bracket (38) integrally by a crane.

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