CN116122169A

CN116122169A - Steel plate composite beam and construction method

Info

Publication number: CN116122169A
Application number: CN202310149094.8A
Authority: CN
Inventors: 程涛; 危明; 刘晓晗; 崔健; 荆翰林
Original assignee: Anhui Road and Bridge Engineering Co Ltd
Current assignee: Anhui Road and Bridge Engineering Co Ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-05-16

Abstract

The invention relates to a steel plate composite beam and a construction method, wherein a girder is spliced by utilizing a spliced steel beam to splice a jig frame; binding the prefabricated bridge deck steel bars by utilizing a spliced steel bar jig; a detachable bridge deck rapid formwork system is adopted; setting an accurate landing auxiliary device of the prefabricated bridge deck; setting a positioning device for wet joint steel bars; setting an epoxy mortar accurate laying device; and a self-made epoxy mortar leveling knife is adopted for quick coating. The beneficial effects of the invention are as follows: the assembly steel beam assembly jig frame is convenient to assemble on site, and the main beams are arranged in the steel beam limiting grooves of the lateral limiting columns at intervals, so that the assembly efficiency and assembly precision of the steel beams are improved; the transverse comb plate and the longitudinal comb plate are utilized to position the distance between the steel bars, so that the binding difficulty of the prefabricated bridge deck steel bars is effectively reduced; the placement accuracy of the prefabricated bridge deck is improved by arranging the placement auxiliary device of the prefabricated bridge deck; and the epoxy mortar laying device is arranged, so that the epoxy mortar laying precision and efficiency are effectively improved.

Description

Steel plate composite beam and construction method

Technical Field

The invention relates to a bridge construction system, in particular to a steel plate composite beam and a construction method.

Background

With the development of society and economy, construction technology based on standardization, assembly and informatization has become the first choice in construction of civil buildings and transportation facilities. For the bridge field, a bridge rapid construction technology based on a prefabrication assembly technology is adopted, and is a construction method for constructing a middle-small span bridge. The steel plate composite beam is a composite beam formed by combining a prefabricated bridge deck and an I-shaped steel beam. The steel plate composite beam structure is favorable for saving construction period, improving mechanization and industrialization of production and accelerating construction progress. However, the steel plate composite beam also has a plurality of difficulties in the construction process, such as large steel beam splicing difficulty, difficult positioning of wet joint steel bars, low reuse rate of a prefabricated bridge deck template system, low positioning precision of a prefabricated bridge deck slab and the like, and the construction process of the steel plate composite beam needs to be strictly controlled and improved.

In summary, aiming at the steel plate composite beam construction system, the steel plate composite beam with high construction speed, high formwork system reuse rate and high prefabricated bridge deck landing precision and the construction method are very important.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a steel plate composite beam and a construction method.

Such a steel plate composite girder includes: the assembly type steel beam assembly jig frame, the assembly type steel bar jig frame, the detachable bridge deck rapid formwork system, the accurate positioning auxiliary device of the prefabricated bridge deck, the positioning device of the wet joint steel bar, the accurate epoxy mortar laying device and the epoxy mortar leveling knife;

the assembly type steel beam assembly jig frame comprises lateral limiting columns; the lateral limiting columns are arranged on two sides of the assembly steel beam assembly jig frame, and steel beam limiting grooves are formed in the lateral limiting columns;

the assembled steel bar jig comprises a transverse comb plate and a longitudinal comb plate, wherein the transverse comb plate is provided with a steel bar limiting groove; a longitudinal comb plate is arranged between the transverse comb plates, and a steel bar limiting groove is also arranged on the longitudinal comb plate;

the detachable bridge deck plate rapid formwork system comprises a transverse comb plate, a flat bottom film, an end die and wedge-shaped adjusting blocks, wherein the transverse comb plate and the end die are arranged around the flat bottom film, and the wedge-shaped adjusting blocks are welded above the flat bottom film;

the accurate positioning auxiliary device of the prefabricated bridge deck comprises a limiting groove and guide channel steel, and the limiting groove is fixedly connected with the main beam; the prefabricated bridge deck is fixedly connected with guide channel steel;

the wet joint reinforcing steel bar setting and positioning device comprises an upper grooving connecting plate and a lower grooving connecting plate; the upper and lower slotting connecting plates are connected with a pressing plate through temporary fixing hooks; the upper and lower slotting connecting plates are provided with upper layer steel bar limiting holes and bottom layer steel bar limiting holes.

As preferable: the assembly steel beam assembly jig frame also comprises a vertical support of the jig frame, a transverse support of the jig frame, an inclined support of the jig frame, a right-angle connecting piece, an inclined strut fixing plate, a bracket underframe and a fixing bolt; the bottom of the vertical support of the jig frame is welded with a bracket underframe which is connected with the ground through a fixing bolt; the vertical support of the jig frame and the transverse support of the jig frame are fixed through right-angle connecting pieces, and fixing bolts are arranged on the right-angle connecting pieces; the two ends of the diagonal bracing of the jig frame are respectively fixed with the vertical support of the jig frame and the transverse support of the jig frame through diagonal bracing fixing plates; the lateral limit column and the transverse support of the jig frame are fixed through right-angle connecting pieces.

As preferable: the assembled steel bar jig further comprises a supporting upright post, a longitudinal comb plate fixing groove, a transverse support, a jig base plate, a longitudinal fixing plate and a clamping groove; the jig frame bottom plates are arranged symmetrically left and right, and are connected through transverse support reinforcement; a supporting upright post is arranged between the bed-jig bottom plate and the transverse comb plate, the supporting upright post is fixed through a right-angle connecting piece, and a fixing bolt is arranged on the right-angle connecting piece; the transverse comb plates are provided with longitudinal comb plate fixing grooves, the longitudinal comb plate fixing grooves on the transverse comb plates on the left side and the right side are symmetrically arranged, and the transverse comb plates on the left side and the right side are connected through the longitudinal fixing plates; the longitudinal comb plate is also provided with a clamping groove, and the longitudinal comb plate is fixedly connected with the longitudinal comb plate fixing groove by the clamping groove.

As preferable: the detachable bridge deck rapid formwork system also comprises an inclined strut fixing plate, a fixing bolt, a bottom die vertical support, a bottom film lateral support and a bottom film inclined strut; the lower part of the flat bottom film is fixed with the ground through a bottom die vertical support, and the bottom of the transverse comb plate is fixedly connected with the flat bottom film through a fixing bolt; the bottom of the end die is fixedly connected with the flat bottom film through a fixing bolt; the transverse comb plate is in reinforcing connection with the flat bottom film through the bottom film lateral support and the bottom film diagonal bracing, diagonal bracing fixing plates are welded at two ends of the bottom film diagonal bracing respectively, and the diagonal bracing fixing plates are connected with the transverse comb plate or the bottom film lateral support through fixing bolts.

As preferable: the accurate landing auxiliary device for the prefabricated bridge deck comprises a fixing bolt, a vertical limiting plate, a fixing connecting plate and a transverse limiting plate; the vertical limiting plates are symmetrically arranged at two ends of the transverse limiting plate in a left-right mode, and a limiting groove is formed in the middle of the transverse limiting plate; one side of the vertical limiting plate is welded with a fixed connecting plate, and the fixed connecting plate is connected with the main beam through a fixed bolt; the prefabricated bridge deck is fixedly connected with guide channel steel through a fixing bolt, and the guide channel steel is located in the limiting groove.

As preferable: the wet joint steel bar is provided with a positioning device and also comprises a reserved hook hole; temporary fixing hooks are arranged on the upper and lower slotted connecting plates through reserved hook holes, and the upper ends of the temporary fixing hooks are connected with the pressing plate; the top and the bottom of the upper and lower slotting connecting plates are respectively provided with an upper layer steel bar limiting hole and a bottom layer steel bar limiting hole.

As preferable: the epoxy mortar accurate laying device comprises a displacement adjusting shaft, a sliding rail, a sliding block, a sliding rail supporting column, a channel steel right-angle connecting piece, epoxy mortar and a sliding rail fixing plate; the left side and the right side of the sliding rail support column are symmetrically arranged, the lower end of the sliding rail support column is provided with a channel steel right-angle connecting piece, and the channel steel right-angle connecting piece is connected with the cross beam through a fixing bolt; the sliding rail fixing plate is fixed with the sliding rail supporting column through bolts, and a sliding rail is arranged on the sliding rail fixing plate; and displacement adjusting shafts are arranged on the sliding rails at intervals and are connected with the sliding rails through sliding blocks.

As preferable: the epoxy mortar leveling knife comprises an epoxy mortar storage tank, a blade, an epoxy mortar output port, an epoxy mortar conveying pipe, a valve connecting rod, a valve opening and closing plate, a valve, a handle and a supporting plate; a handle is welded on one side of the supporting plate, an epoxy mortar storage tank is arranged above the supporting plate, and epoxy mortar is stored in the epoxy mortar storage tank; the upper end of the epoxy mortar conveying pipe is connected with the bottom of the epoxy mortar storage tank, and the lower end of the epoxy mortar conveying pipe is level with the blade; the interior of the epoxy mortar conveying pipe is provided with a valve opening and closing plate, the valve opening and closing plate is connected with a valve by a valve connecting rod, and the angle of the valve opening and closing plate is adjusted to change along with the rotation of the valve.

The construction method of the steel plate composite beam comprises the following steps:

step one, assembling steel plate combined beams by utilizing assembled steel beam assembling jig frames: installing assembly type steel beam assembly jig frames, wherein the main beams are arranged in steel beam limiting grooves of the lateral limiting columns at intervals; welding cross beams between adjacent main beams, and assembling steel plate combined beams;

step two, hoisting construction of the steel plate composite beam: the single longitudinal beam whole span hoisting method is adopted, the automobile crane is utilized for hoisting, and the steel plate combination Liang Zongliang hoisting sequence is as follows: inner side beams, middle beams and outer beams;

step three, binding reinforcing steel bars: installing a spliced steel bar jig frame, positioning the steel bar spacing by using a transverse comb plate and a longitudinal comb plate, and binding the steel bars of the prefabricated bridge deck;

fourth, pouring the steel reinforcement framework into a die and a bridge deck slab: after the detachable bridge deck formwork supporting system is installed, the transverse steel bars and the transverse comb plates are aligned and lowered, so that the steel bar framework is put into the formwork; pouring a prefabricated bridge deck;

step five, paving epoxy mortar: mounting an epoxy mortar paving device, and adjusting the position of a displacement adjusting shaft by utilizing a sliding block to realize accurate paving of epoxy mortar; and an epoxy mortar scraping knife is adopted for auxiliary paving; adjusting the delivery of the epoxy mortar through a valve;

step six, accurate placement of bridge deck boards: the accurate positioning auxiliary device of the prefabricated bridge deck is utilized, and the guide channel steel is positioned in the limiting groove by hoisting the bridge deck;

step seven, wet joint construction: and installing a positioning device for the wet joint steel bars, and pouring concrete after the wet joint steel bars are positioned and the wet joint templates are fixed by adopting steel ropes and pressing plates.

Preferably, in the seventh step: a bamboo plywood is used as a bottom die of the wet joint, a plastic sleeve is arranged on a steel cable, and two ends of a pressing plate are provided with fixed connecting plates; the prefabricated bridge deck is provided with an embedded positioning plate, the embedded positioning plate is provided with an embedded inserted rod, and the embedded positioning plate is connected with the fixed connecting plate through a fixed bolt; pouring concrete after the steel bars and the templates are accepted; the concrete is poured by adopting an automobile crane matching hopper, an inserted vibrator is used for vibrating the concrete in the middle part after surrounding and in a quick-inserting and slow-pulling way, and a plastic film is covered after the concrete construction is finished.

The beneficial effects of the invention are as follows:

1) The assembly steel beam assembly jig frame is convenient to assemble on site, and the main beams are arranged in the steel beam limiting grooves of the lateral limiting columns at intervals, so that the assembly efficiency and the assembly precision of the steel beams are improved.

2) The invention provides the assembled steel bar jig frame, and positions the steel bar spacing by utilizing the transverse comb plate and the longitudinal comb plate, thereby effectively reducing the binding difficulty of the prefabricated bridge deck steel bars.

3) According to the invention, a detachable bridge deck plate rapid formwork system is adopted, the periphery of the flat bottom film is provided with the transverse comb plates and the end dies, and the wedge-shaped adjusting blocks are welded above the flat bottom film, so that the prefabrication efficiency of the variable-section bridge deck plate is improved.

4) The invention is provided with the prefabricated bridge deck landing auxiliary device, and is provided with the matched guide channel steel and the limit groove, so that the landing precision of the prefabricated bridge deck is improved.

5) The wet joint steel bar positioning device is arranged, and the difficulty in installing the wet joint steel bars is effectively reduced through the upper and lower slotted connecting plates with the upper layer steel bar limiting holes and the lower layer steel bar limiting holes at the upper and lower ends respectively.

6) According to the epoxy mortar paving device, the position of the displacement adjusting shaft is adjusted by the sliding block, so that the epoxy mortar is accurately paved, and the epoxy mortar paving precision and efficiency are effectively improved.

7) According to the invention, a self-made epoxy mortar scraping knife is adopted, the conveying of the epoxy mortar is regulated through a valve, and the knife blade which is flush with the lower end of the epoxy mortar conveying pipe is arranged, so that the epoxy mortar smearing speed can be greatly improved.

Drawings

FIG. 1 is a schematic diagram of a sectional steel beam assembly jig frame;

FIG. 2 is a schematic view of a girder assembly structure;

FIG. 3 is a schematic view of a steel beam assembly completion structure;

fig. 4 is a schematic diagram of a modular rebar matrix;

FIG. 5 is a schematic view of a longitudinal comb plate structure;

FIG. 6 is a schematic diagram of a removable bridge deck rapid formwork architecture;

FIG. 7 is a schematic view of a prefabricated deck mounting structure;

FIG. 8 is a schematic view of a prefabricated deck slab placement aid;

FIG. 9 is a schematic view of a wet joint construction;

fig. 10 is a schematic view of a wet joint rebar positioning device;

FIG. 11 is a schematic view of a wire rope construction;

FIG. 12 is a schematic anchoring of the pre-buried locating plate to the fixed connection;

FIG. 13 is a schematic view of an epoxy mortar laying device;

fig. 14 is a schematic diagram of a self-made epoxy mortar doctor blade.

In the figure: 1-assembly steel beam assembly jig frame, 2-jig frame vertical support, 3-jig frame transverse support, 4-jig frame inclined support, 5-steel beam limit groove, 6-right angle connector, 7-inclined support fixing plate, 8-bracket arm underframe, 9-fixing bolt, 10-lateral limit column, 11-shear pin, 12-vertical stiffening rib, 13-main beam, 14-cross beam, 15-assembly steel bar jig frame, 16-support upright post, 17-transverse comb plate, 18-longitudinal comb plate fixing groove, 19-transverse support, 20-steel bar limit groove, 21-jig frame bottom plate, 22-longitudinal fixing plate, 23-longitudinal comb plate, 24-clamping groove, 25-flat plate bottom film, 26-bottom die vertical support, 27-bottom film lateral support, 28-basement membrane diagonal bracing, 29-end mould, 30-wedge-shaped adjusting block, 31-vertical limiting plate, 32-limiting groove, 33-fixed connecting plate, 34-transverse limiting plate, 35-guide channel steel, 36-prefabricated bridge deck, 37-pre-buried wet joint reinforcing steel bar, 38-pressing plate, 39-steel cable, 40-temporary fixed steel hook, 41-bottom layer reinforcing steel bar, 42-upper layer reinforcing steel bar, 43-plastic sleeve, 44-wet joint bottom surface template, 45-upper and lower grooving connecting plate, 46-fixed connecting plate, 47-upper layer reinforcing steel bar limiting hole, 48-reserved hook hole, 49-bottom layer reinforcing steel bar limiting hole, 50-, pre-buried positioning plate, 51-pre-buried inserting rod, 52-displacement adjusting shaft and 53-sliding rail, 54-sliding blocks, 55-sliding rail supporting columns, 56-channel steel right-angle connectors, 57-epoxy mortar, 58-sliding rail fixing plates, 59-epoxy mortar storage tanks, 60-blades, 61-epoxy mortar output ports, 62-epoxy mortar conveying pipes, 63-valve connecting rods, 64-valve opening and closing plates, 65-valves, 66-handles and 67-supporting plates.

Detailed Description

The invention is further described below with reference to examples. The following examples are presented only to aid in the understanding of the invention. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present invention without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Example 1

As an example, as shown in fig. 1 to 14, the steel plate composite beam system comprises a combined steel beam assembly jig 1, a jig vertical support 2, a jig horizontal support 3, a jig diagonal support 4, a steel beam limit groove 5, a right angle connector 6, a diagonal bracing fixing plate 7, a bracket underframe 8, a fixing bolt 9, a lateral limit post 10, a shear nail 11, a vertical stiffening rib 12, a main beam 13, a cross beam 14, a combined steel bar jig 15, a support upright post 16, a horizontal comb plate 17, a vertical comb plate fixing groove 18, a horizontal support 19, a steel bar limit groove 20, a jig bottom plate 21, a vertical fixing plate 22, a vertical comb plate 23, a clamping groove 24, a flat plate bottom film 25, a bottom die vertical support 26, a bottom film lateral support 27, a bottom film diagonal support 28, an end die 29, a wedge-shaped adjusting block 30, a vertical limit plate 31, a limit groove 32 and a fixing connecting plate 33, the transverse limiting plate 34, the guide channel steel 35, the prefabricated bridge deck 36, the pre-buried wet joint steel bar 37, the pressing plate 38, the steel cable 39, the temporary fixing steel hook 40, the bottom layer steel bar 41, the upper layer steel bar 42, the plastic sleeve 43, the wet joint bottom surface template 44, the upper and lower grooving connecting plates 45, the fixing connecting plates 46, the upper layer steel bar limiting holes 47, the reserved hook holes 48, the bottom layer steel bar limiting holes 49, the pre-buried locating plate 50, the pre-buried inserting rod 51, the displacement adjusting shaft 52, the sliding rail 53, the sliding block 54, the sliding rail supporting column 55, the channel steel right-angle connecting piece 56, the epoxy mortar 57, the sliding rail fixing plate 58, the epoxy mortar storage groove 59, the blade 60, the epoxy mortar output port 61, the epoxy mortar conveying pipe 62, the valve connecting rod 63, the valve opening and closing plate 64, the valve 65, the handle 66 and the supporting plate 67; the main beam 13 is spliced and the jig frame 1 is spliced by utilizing the spliced steel beams; the prefabricated bridge deck 36 is bound by reinforcing steel bars and assembled by the reinforcing steel bar jig 15; a detachable bridge deck rapid formwork system is adopted; providing a precision landing aid for the precast bridge deck 36; setting a positioning device for wet joint steel bars; setting an epoxy mortar 57 accurate laying device; and a self-made epoxy mortar leveling knife is adopted for quick coating.

The assembly type steel beam assembly jig frame 1 consists of a vertical jig frame support 2, a transverse jig frame support 3, an inclined jig frame support 4, a steel beam limiting groove 5, a right-angle connecting piece 6, an inclined strut fixing plate 7, a bracket underframe 8, a fixing bolt 9 and a lateral limiting column 10; the bottom of the jig frame vertical support 2 is welded with a bracket arm underframe 8, and a fixed bolt 9 is arranged to be connected with the ground; the vertical support 2 of the jig frame and the transverse support 3 of the jig frame are fixed through right-angle connecting pieces 6, and fixing bolts 9 are arranged on the right-angle connecting pieces 6; a jig inclined support 4 is further arranged between the vertical jig support 2 and the transverse jig support 3 for reinforcing connection, and inclined support fixing plates 7 are welded at two ends of the inclined jig support 4 respectively and are fixed with the vertical jig support 2 and the transverse jig support 3; the lateral limiting column 10 is provided with a steel beam limiting groove 5 which is fixed with the transverse support 3 of the jig frame through a right-angle connecting piece 6.

The assembled steel bar jig 15 consists of a supporting upright post 16, a transverse comb plate 17, a longitudinal comb plate fixing groove 18, a transverse support 19, a steel bar limiting groove 20, a jig bottom plate 21, a longitudinal fixing plate 22, a longitudinal comb plate 23 and a clamping groove 24; the bed-jig bottom plates 21 are arranged symmetrically left and right and are connected in a reinforcing way through transverse supports 19; a steel bar limiting groove 20 is arranged on the transverse comb plate 17; a supporting upright post 16 is arranged between the jig frame bottom plate 21 and the transverse comb plate 17 and is fixed through a right-angle connecting piece 6, and a fixing bolt 9 is arranged on the right-angle connecting piece 6; the transverse comb plate 17 is provided with longitudinal comb plate fixing grooves 18 which are symmetrically arranged on the left side and the right side and are connected in a reinforcing way through longitudinal fixing plates 22; the longitudinal comb plate 23 is provided with a steel bar limiting groove 20 and a clamping groove 24, and is fixedly connected with the longitudinal comb plate fixing groove 18 by the clamping groove 24.

The detachable bridge deck plate rapid formwork system consists of an inclined support fixing plate 7, fixing bolts 9, a transverse comb plate 17, a flat bottom film 25, a bottom die vertical support 26, a bottom film lateral support 27, a bottom film inclined support 28, an end die 29 and a wedge-shaped adjusting block 30; a bottom die vertical support 26 is arranged below the flat bottom film 25 and fixed with the ground, and a wedge-shaped regulating block 30 is welded above the bottom die vertical support; the bottom fixing bolts 9 of the transverse comb plate 17 are fixedly connected with the flat bottom film 25; the bottom fixing bolt 9 of the end die 29 is fixedly connected with the flat bottom film 25; and a bottom film lateral support 27 and a bottom film diagonal support 28 are arranged between the transverse comb plate 17 and the flat bottom film 25 for reinforcement connection, diagonal support fixing plates 7 are welded at two ends of the bottom film diagonal support 28 respectively, and the bottom film diagonal support 28 is connected with the transverse comb plate 17 and the bottom film lateral support 27 through fixing bolts 9.

The accurate landing auxiliary device for the prefabricated bridge deck comprises a fixed bolt 9, a vertical limiting plate 31, a limiting groove 32, a fixed connecting plate 33, a transverse limiting plate 34 and a guide channel steel 35; the vertical limiting plate 31 and the horizontal limiting plate 34 are formed by welding, are symmetrically arranged left and right, and are provided with limiting grooves 32 in the middle; one side of the vertical limiting plate 31 is welded with a fixed connecting plate 33, and is connected with the main beam 13 through a fixed bolt 9; the prefabricated bridge deck 36 is fixedly connected with the guide channel steel 35 through the fixing bolts 9, and accurate positioning of the prefabricated bridge deck 36 is achieved through the locating limiting grooves 32 of the guide channel steel 35.

The wet joint steel bar setting and positioning device consists of a temporary fixing hook 40, an upper grooving connecting plate 45, a lower grooving connecting plate 45, an upper layer steel bar limiting hole 47, a reserved hook hole 48 and a bottom layer steel bar limiting hole 49; a reserved hook hole 48 is arranged on the upper and lower grooving connecting plates 45 for installing the temporary fixing hook 40, and the temporary fixing hook 40 is connected with the pressing plate 38; the top and the bottom of the upper and lower grooving connecting plates 45 are respectively provided with an upper layer steel bar limiting hole 47 and a bottom layer steel bar limiting hole 49, so that the accurate positioning of wet joint steel bars is realized.

The precise epoxy mortar 57 paving device consists of a displacement adjusting shaft 52, a sliding rail 53, a sliding block 54, a sliding rail supporting column 55, a channel steel right-angle connecting piece 56, epoxy mortar 57 and a sliding rail fixing plate 58; the left side and the right side of the slide rail support columns 55 are symmetrically arranged, and the lower end of the slide rail support columns is provided with a channel steel right-angle connecting piece 56 which is connected with the cross beam 14 through a fixing bolt 9; the slide rail fixing plate 58 is fixed with the slide rail supporting column 55 through bolts, and a slide rail 53 is arranged on the slide rail fixing plate; the displacement adjusting shafts 52 are arranged on the sliding rails at intervals, are connected with the sliding rails 53 through the sliding blocks 54, and the positions of the displacement adjusting shafts 52 are adjusted through the sliding blocks 54, so that the epoxy mortar 57 is accurately paved.

The epoxy mortar leveling knife consists of an epoxy mortar storage tank 59, a blade 60, an epoxy mortar output port 61, an epoxy mortar conveying pipe 62, a valve connecting rod 63, a valve opening and closing plate 64, a valve 65, a handle 66 and a supporting plate 67; the handle 66 is welded on the right side of the supporting plate 67, and the epoxy mortar storage tank 59 is arranged above the supporting plate to store the epoxy mortar 57; the upper end of the epoxy mortar conveying pipe 62 is connected with the bottom of the epoxy mortar storage tank 59, and the lower end is flush with the blade 60; the valve opening and closing plate 64 is arranged in the epoxy mortar conveying pipe 62, the valve connecting rod 63 is connected with the valve 65, and the angle of the valve opening and closing plate 64 is adjusted by rotating the valve 65, so that the epoxy mortar 57 is conveyed.

Example two

As another embodiment, the construction method of the steel plate composite beam according to the first embodiment is provided in this embodiment, and the main construction steps are as follows:

step one, steel beam transportation: after the steel structure unit element is manufactured in a factory, the steel structure unit element is transported to a bridge site erection site by adopting a highway, and the assembly extension and the installation erection of the steel beams are carried out on the assembled steel beam assembly jig frame 1.

Assembling steel beam assembling jig frame installation: the assembly type steel beam assembly jig frame 1 consists of a vertical jig frame support 2, a transverse jig frame support 3, a diagonal jig frame support 4, a steel beam limiting groove 5, a right-angle connecting piece 6, a diagonal bracing fixing plate 7, a bracket underframe 8, a fixing bolt 9 and a lateral limiting column 10; the bottom of the jig frame vertical support 2 is welded with a bracket arm underframe 8, and a fixed bolt 9 is arranged to be connected with the ground; the vertical support 2 of the jig frame and the transverse support 3 of the jig frame are fixed through right-angle connecting pieces 6, and fixing bolts 9 are arranged on the right-angle connecting pieces 6; a jig inclined support 4 is further arranged between the vertical jig support 2 and the transverse jig support 3 for reinforcing connection, and inclined support fixing plates 7 are welded at two ends of the inclined jig support 4 respectively and are fixed with the vertical jig support 2 and the transverse jig support 3; the lateral limiting column 10 is provided with a steel beam limiting groove 5 which is fixed with the transverse support 3 of the jig frame through a right-angle connecting piece 6. The prefabricated main beams 13 are provided with vertical stiffening ribs 12 and shear nails 11, and the main beams 13 are arranged in the steel beam limiting grooves 5 of the lateral limiting columns 10 at intervals; the cross beams 14 are welded between adjacent main beams 13.

Step two, hoisting construction of the steel plate composite beam: after the steel plate combined beam is assembled on site, a single longitudinal beam whole span one by one hoisting method is adopted, an automobile crane is utilized for hoisting, and the steel plate combination Liang Zongliang hoisting sequence is as follows: inner side beam, middle beam and outer side beam.

Step three, assembling type steel bar jig frame installation: the assembled steel bar jig 15 consists of a supporting upright post 16, a transverse comb plate 17, a longitudinal comb plate fixing groove 18, a transverse support 19, a steel bar limiting groove 20, a jig bottom plate 21, a longitudinal fixing plate 22, a longitudinal comb plate 23 and a clamping groove 24; the bed-jig bottom plates 21 are arranged symmetrically left and right and are connected in a reinforcing way through transverse supports 19; a steel bar limiting groove 20 is arranged on the transverse comb plate 17; a supporting upright post 16 is arranged between the jig frame bottom plate 21 and the transverse comb plate 17 and is fixed through a right-angle connecting piece 6, and a fixing bolt 9 is arranged on the right-angle connecting piece 6; the transverse comb plate 17 is provided with longitudinal comb plate fixing grooves 18 which are symmetrically arranged on the left side and the right side and are connected in a reinforcing way through longitudinal fixing plates 22; the longitudinal comb plate 23 is provided with a steel bar limiting groove 20 and a clamping groove 24, and is fixedly connected with the longitudinal comb plate fixing groove 18 by the clamping groove 24.

Binding reinforcing steel bars: after the assembly type steel bar jig 15 is installed, the comb plate is utilized to position the steel bar spacing, and steel bar binding of the prefabricated bridge deck 36 is carried out, so that the binding of the steel bars meets the construction requirement of a bridge.

Step four, manufacturing and installing a detachable bridge deck formwork system: the detachable bridge deck rapid formwork system is a combined system of a flat bottom die 25, wedge-shaped adjusting blocks 30, comb plates and end dies 29, and the size of the prefabricated bridge deck 36 is changed only by adjusting the positions of the wedge-shaped adjusting blocks 30 and the end dies 29 according to drawings. A bottom die vertical support 26 is arranged below a flat bottom film 25 of the detachable bridge deck rapid formwork system and fixed with the ground, and a wedge-shaped adjusting block 30 is welded above the bottom die vertical support; the bottom fixing bolts 9 of the transverse comb plate 17 are fixedly connected with the flat bottom film 25; the bottom fixing bolt 9 of the end die 29 is fixedly connected with the flat bottom film 25; and a bottom film lateral support 27 and a bottom film diagonal support 28 are arranged between the transverse comb plate 17 and the flat bottom film 25 for reinforcement connection, diagonal support fixing plates 7 are welded at two ends of the bottom film diagonal support 28 respectively, and the bottom film diagonal support 28 is connected with the transverse comb plate 17 and the bottom film lateral support 27 through fixing bolts 9.

And (5) molding the steel reinforcement framework: after binding the steel bars, adopting a special steel bar hoisting sling to slowly hoist the steel bars above the templates, aligning the gaps between the transverse steel bars and the comb plates through position adjustment, slowly lowering the steel bars to enable the steel bar framework to be slowly put into the die, and adjusting the intervals of part of the steel bars in time if collision positions exist between the steel bars and the templates in the process of putting into the die so as to enable the steel bars to be smoothly put into the die and then restored; and after the mold is put into the mold, installing the transverse prestressed pipeline.

Bridge deck slab concrete pouring and curing: to ensure the internal and external quality of the precast bridge deck 36 concrete, the corrugated pipe is vibrated by a phi 30 vibrating rod, and the corrugated pipe is vibrated by a phi 50 vibrating rod. The vibrator must not collide with templates, bellows and other embedded parts. The concrete curing adopts a surface film-covered water sprinkling and moisture-preserving curing mode.

Stretching and grouting: the steel bundles are stretched in a staggered way by adopting single ends, and the single ends are stretched in a staggered way and gradually loaded in a grading way; before grouting, cleaning the pore canal by using an air compressor, grouting by using intelligent grouting equipment, and continuously grouting the same pipeline, wherein the grouting is completed once.

Step five, paving epoxy mortar: the epoxy mortar laying device is installed when the epoxy mortar 57 is laid, and consists of a displacement adjusting shaft 52, a sliding rail 53, a sliding block 54, a sliding rail supporting column 55, a channel steel right-angle connecting piece 56, the epoxy mortar 57 and a sliding rail fixing plate 58; the left side and the right side of the slide rail support columns 55 are symmetrically arranged, and the lower end of the slide rail support columns is provided with a channel steel right-angle connecting piece 56 which is connected with the cross beam 14 through a fixing bolt 9; the slide rail fixing plate 58 is fixed with the slide rail supporting column 55 through bolts, and a slide rail 53 is arranged on the slide rail fixing plate; displacement adjusting shafts 52 are arranged on the sliding rails at intervals, are connected with the sliding rails 53 through sliding blocks 54, and the positions of the displacement adjusting shafts 52 are adjusted through the sliding blocks 54, so that the epoxy mortar 57 is accurately paved; when the epoxy mortar 57 is paved, a self-made epoxy mortar leveling knife is adopted for paving uniformly; the angle of the valve opening and closing plate 64 is adjusted by rotating a valve 65 arranged on the epoxy mortar scraping knife, so that the epoxy mortar 57 is conveyed.

Step six, installing a prefabricated bridge deck slab: the bridge deck 36 is installed and utilized to accurately fall to an auxiliary device, and consists of a fixed bolt 9, a vertical limiting plate 31, a limiting groove 32, a fixed connecting plate 33, a transverse limiting plate 34 and a guide channel steel 35; the vertical limiting plate 31 and the horizontal limiting plate 34 are formed by welding, are symmetrically arranged left and right, and are provided with limiting grooves 32 in the middle; one side of the vertical limiting plate 31 is welded with a fixed connecting plate 33, and is connected with the main beam 13 through a fixed bolt 9; the prefabricated bridge deck 36 is fixedly connected with the guide channel steel 35 through the fixing bolts 9, the bridge deck 36 is hoisted by a crane through the guide channel steel 35 falling position limiting groove 32, and accurate positioning of the prefabricated bridge deck 36 is achieved.

Step seven, wet joint construction: after the bridge deck 36 is in place, the wet joint construction is started, and a positioning device is arranged when the wet joint steel bars are bound, and the wet joint steel bar construction comprises a temporary fixing hook 40, an upper and a lower slotting connecting plates 45, an upper layer steel bar limiting hole 47, a reserved hook hole 48 and a bottom layer steel bar limiting hole 49; a reserved hook hole 48 is arranged on the upper and lower grooving connecting plates 45 for installing the temporary fixing hook 40, and the temporary fixing hook 40 is connected with the pressing plate 38; the top and the bottom of the upper and lower grooving connecting plates 45 are respectively provided with an upper layer steel bar limiting hole 47 and a bottom layer steel bar limiting hole 49, so that the accurate positioning of wet joint steel bars is realized. The wet joint template adopts a bamboo plywood as a bottom die, is fixed by adopting a steel cable 39 and a pressing plate 38, a plastic sleeve 43 is arranged on the steel cable 39, and two ends of the pressing plate 38 are provided with fixed connecting plates 46; the prefabricated bridge deck 36 is provided with an embedded locating plate 50, the embedded locating plate 50 is provided with an embedded inserted rod 51, and the embedded locating plate is connected with the fixed connection plate 46 through a fixed bolt 9. And (5) pouring concrete after the steel bars and the templates are accepted. The concrete is poured by adopting an automobile crane matching hopper, and the vibrator is inserted into the middle part after surrounding, so that quick and slow plugging and pulling are realized, and the phenomena of over vibration and leakage vibration are avoided. After the concrete construction is finished, the plastic film is covered, water is locked, and cracks are prevented from occurring due to early shrinkage.

Claims

1. A steel plate composite beam, comprising: the assembly type steel beam assembly jig frame (1), the assembly type steel bar jig frame (15), a detachable bridge deck rapid formwork system, a prefabricated bridge deck accurate landing auxiliary device, a wet joint steel bar setting positioning device, an epoxy mortar accurate laying device and an epoxy mortar leveling knife;

the assembly steel beam assembly jig frame (1) comprises lateral limit columns (10); the lateral limiting columns (10) are arranged on two sides of the assembled steel beam assembly jig frame (1), and steel beam limiting grooves (5) are formed in the lateral limiting columns (10);

the assembled steel bar jig frame (15) comprises a transverse comb plate (17) and a longitudinal comb plate (23), wherein the transverse comb plate (17) is provided with a steel bar limiting groove (20); a longitudinal comb plate (23) is arranged between the transverse comb plates (17), and a steel bar limiting groove (20) is also arranged on the longitudinal comb plate (23);

the detachable bridge deck plate rapid formwork system comprises a transverse comb plate (17), a flat plate bottom film (25), an end die (29) and a wedge-shaped adjusting block (30), wherein the transverse comb plate (17) and the end die (29) are arranged around the flat plate bottom film (25), and the wedge-shaped adjusting block (30) is welded above the flat plate bottom film (25);

the accurate positioning auxiliary device of the prefabricated bridge deck comprises a limiting groove (32) and a guide channel steel (35), wherein the limiting groove (32) is fixedly connected with the main beam (13); the prefabricated bridge deck (36) is fixedly connected with guide channel steel (35);

the wet joint reinforcing steel bar setting and positioning device comprises an upper grooving connecting plate and a lower grooving connecting plate (45); the upper and lower grooving connecting plates (45) are connected with a pressing plate (38) through temporary fixing hooks (40); the upper and lower grooving connecting plates (45) are provided with upper layer steel bar limiting holes (47) and bottom layer steel bar limiting holes (49).

2. The steel plate composite beam according to claim 1, wherein: the assembly steel beam assembly jig frame (1) further comprises a vertical jig frame support (2), a transverse jig frame support (3), a diagonal jig frame support (4), right-angle connectors (6), diagonal bracing fixing plates (7), a bracket underframe (8) and fixing bolts (9); the bottom of the jig frame vertical support (2) is welded with a bracket underframe (8), and the bracket underframe (8) is connected with the ground through a fixing bolt (9); the jig frame vertical support (2) and the jig frame transverse support (3) are fixed through a right-angle connecting piece (6), and a fixing bolt (9) is arranged on the right-angle connecting piece (6); a jig frame inclined support (4) is further arranged between the jig frame vertical support (2) and the jig frame transverse support (3) for reinforcing connection, and two ends of the jig frame inclined support (4) are respectively fixed with the jig frame vertical support (2) and the jig frame transverse support (3) through inclined support fixing plates (7); the lateral limit column (10) and the jig frame transverse support (3) are fixed through a right-angle connecting piece (6).

3. The steel plate composite beam according to claim 1, wherein: the assembled steel bar jig frame (15) further comprises a supporting upright post (16), a longitudinal comb plate fixing groove (18), a transverse support (19), a jig frame bottom plate (21), a longitudinal fixing plate (22) and a clamping groove (24); the bed-jig bottom plates (21) are arranged symmetrically left and right, and the bed-jig bottom plates (21) are connected in a reinforcing way through transverse supports (19); a supporting upright post (16) is arranged between the jig frame bottom plate (21) and the transverse comb plate (17), the supporting upright post (16) is fixed through a right-angle connecting piece (6), and a fixing bolt (9) is arranged on the right-angle connecting piece (6); the transverse comb plate (17) is provided with longitudinal comb plate fixing grooves (18), the longitudinal comb plate fixing grooves (18) on the transverse comb plate (17) on the left side and the right side are symmetrically arranged, and the transverse comb plates (17) on the left side and the right side are connected through longitudinal fixing plates (22); the longitudinal comb plate (23) is also provided with a clamping groove (24), and the longitudinal comb plate (23) is fixedly connected with the longitudinal comb plate fixing groove (18) by the clamping groove (24).

4. The steel plate composite beam according to claim 1, wherein: the detachable bridge deck rapid formwork system also comprises an inclined strut fixing plate (7), a fixing bolt (9), a bottom die vertical support (26), a bottom film lateral support (27) and a bottom film inclined strut (28); the lower part of the flat bottom film (25) is fixed with the ground through a bottom die vertical support (26), and the bottom of the transverse comb plate (17) is fixedly connected with the flat bottom film (25) through a fixing bolt (9); the bottom of the end mould (29) is fixedly connected with the flat bottom film (25) through a fixing bolt (9); the transverse comb plate (17) is in reinforced connection with the flat base film (25) through a base film lateral support (27) and a base film diagonal support (28), diagonal support fixing plates (7) are welded at two ends of the base film diagonal support (28) respectively, and the diagonal support fixing plates (7) are connected with the transverse comb plate (17) or the base film lateral support (27) through fixing bolts (9).

5. The steel plate composite beam according to claim 1, wherein: the accurate landing auxiliary device for the prefabricated bridge deck comprises a fixing bolt (9), a vertical limiting plate (31), a fixing connecting plate (33) and a transverse limiting plate (34); the vertical limiting plates (31) are symmetrically arranged at two ends of the transverse limiting plate (34) in a left-right mode, and a limiting groove (32) is formed in the middle of the transverse limiting plate (34); one side of the vertical limiting plate (31) is welded with a fixed connecting plate (33), and the fixed connecting plate (33) is connected with the main beam (13) through a fixed bolt (9); the prefabricated bridge deck (36) is fixedly connected with the guide channel steel (35) through the fixing bolt (9), and the guide channel steel (35) is located in the limit groove (32).

6. The steel plate composite beam according to claim 1, wherein: the wet joint reinforcing steel bar is provided with a positioning device and also comprises a reserved hook hole (48); a temporary fixing hook (40) is arranged on the upper and lower slotting connecting plates (45) through a reserved hook hole (48), and the upper end of the temporary fixing hook (40) is connected with the pressing plate (38); the top and the bottom of the upper and lower slotting connecting plates (45) are respectively provided with an upper layer steel bar limiting hole (47) and a bottom layer steel bar limiting hole (49).

7. The steel plate composite beam according to claim 1, wherein: the epoxy mortar accurate laying device comprises a displacement adjusting shaft (52), a sliding rail (53), a sliding block (54), a sliding rail supporting column (55), a channel steel right-angle connecting piece (56), epoxy mortar (57) and a sliding rail fixing plate (58); the left side and the right side of the sliding rail support columns (55) are symmetrically arranged, the lower ends of the sliding rail support columns (55) are provided with channel steel right-angle connecting pieces (56), and the channel steel right-angle connecting pieces (56) are connected with the cross beam (14) through fixing bolts (9); the sliding rail fixing plate (58) is fixed with the sliding rail supporting column (55) through bolts, and the sliding rail (53) is arranged on the sliding rail fixing plate (58); and displacement adjusting shafts (52) are arranged on the sliding rails (53) at intervals, and the displacement adjusting shafts (52) are connected with the sliding rails (53) through sliding blocks (54).

8. The steel plate composite beam according to claim 1, wherein: the epoxy mortar leveling knife comprises an epoxy mortar storage tank (59), a blade (60), an epoxy mortar output port (61), an epoxy mortar conveying pipe (62), a valve connecting rod (63), a valve opening and closing plate (64), a valve (65), a handle (66) and a supporting plate (67); a handle (66) is welded on one side of the supporting plate (67), an epoxy mortar storage tank (59) is arranged above the supporting plate (67), and epoxy mortar (57) is stored in the epoxy mortar storage tank (59); the upper end of the epoxy mortar conveying pipe (62) is connected with the bottom of the epoxy mortar storage tank (59), and the lower end is level with the blade (60); the interior of the epoxy mortar conveying pipe (62) is provided with a valve opening and closing plate (64), the valve opening and closing plate (64) is connected with a valve (65) by a valve connecting rod (63), and the angle of the valve opening and closing plate (64) is adjusted to change along with the rotation of the valve (65).

9. The construction method of a steel plate composite beam according to any one of claims 1 to 8, comprising the steps of:

step one, assembling steel plate combined beams by utilizing assembled steel beam assembling jig frames: installing assembly steel beam assembly jig frames (1), wherein main beams (13) are arranged in steel beam limiting grooves (5) of lateral limiting columns (10) at intervals; welding cross beams (14) between adjacent main beams (13), and assembling steel plate composite beams;

step three, binding reinforcing steel bars: installing a spliced steel bar jig (15), positioning the steel bar spacing by using a transverse comb plate (17) and a longitudinal comb plate (23), and binding the steel bars of a prefabricated bridge deck (36);

fourth, pouring the steel reinforcement framework into a die and a bridge deck slab: after the detachable bridge deck formwork system is installed, the transverse steel bars and the transverse comb plates (17) are aligned and lowered, so that the steel bar framework is put into the formwork; casting a prefabricated bridge deck (36);

step five, paving epoxy mortar: mounting an epoxy mortar paving device, and adjusting the position of a displacement adjusting shaft (52) by utilizing a sliding block (54) to realize accurate paving of epoxy mortar (57); and an epoxy mortar scraping knife is adopted for auxiliary paving; adjusting the delivery of the epoxy mortar (57) through a valve (65);

step six, accurate placement of bridge deck boards: the accurate positioning auxiliary device of the prefabricated bridge deck is utilized, and the guide channel steel (35) is positioned in the limiting groove (32) by lifting the bridge deck (36);

step seven, wet joint construction: and installing a positioning device for the wet joint steel bars, and after the wet joint steel bars are positioned, fixing the wet joint templates by adopting steel ropes (39) and pressing plates (38), and pouring concrete.

10. The method of constructing a steel plate composite beam according to claim 9, wherein in step seven: a bamboo plywood is used as a bottom die of a wet joint, a plastic sleeve (43) is arranged on a steel cable (39), and two ends of a pressing plate (38) are provided with fixed connection plates (46); the prefabricated bridge deck (36) is provided with an embedded positioning plate (50), the embedded positioning plate (50) is provided with an embedded inserted rod (51), and the embedded positioning plate (50) is connected with the fixed connection plate (46) through a fixed bolt (9); pouring concrete after the steel bars and the templates are accepted; the concrete is poured by adopting an automobile crane matching hopper, an inserted vibrator is used for vibrating the concrete in the middle part after surrounding and in a quick-inserting and slow-pulling way, and a plastic film is covered after the concrete construction is finished.