CN106149540A - Assembling steel plate composite beam bridge and construction method thereof based on steel reinforced concrete combined bridge deck - Google Patents

Abstract

The invention discloses an assembled steel plate composite girder bridge based on a steel-concrete composite bridge deck and a construction method thereof. In the steel-concrete composite bridge deck section on the main girder support structure, the multiple steel main beams are I-steel main beams laid along the longitudinal direction of the bridge; For steel-concrete composite bridge deck units, vertical cast-in-place concrete structures are evenly distributed above the steel main girder; the construction method includes steps: 1. Construction of the lower support structure of the bridge; 2. Construction of steel main girder erection; 3. Steel-concrete composite bridge deck Segmental installation; 4. Longitudinal connecting reinforcement piercing; 5. Longitudinal cast-in-place concrete structure pouring construction. The invention has the advantages of reasonable design, convenient construction, good use effect, excellent mechanical properties, fast installation and disassembly construction speed, short construction period, and can effectively solve the problem of excessive main beam spacing.

Description

Prefabricated steel plate composite girder bridge based on steel-concrete composite bridge deck and its construction method

technical field

The invention belongs to the technical field of bridge construction, and in particular relates to an assembled steel plate composite girder bridge based on a steel-concrete composite bridge deck and a construction method thereof.

Background technique

Steel plate composite girder bridges are composed of steel girders, concrete bridge decks and connecting systems. For bridge decks with a large width, it is usually connected in the form of longitudinal wet joints. At the wet joints, it is necessary to build formwork, connect reserved steel bars, and pour wet joint concrete. This construction method has complicated procedures and requires on-site operations. The amount is large, and it is not convenient for secondary replacement of the bridge deck.

The rapid assembly construction of steel plate composite girder bridges is a construction method that develops relatively rapidly at home and abroad. It is widely used in rapid construction of bridges and renovation projects of old bridges due to a series of advantages such as fast construction speed, small impact on traffic, and good construction quality. middle. In order to realize the rapid assembly of steel plate composite girder bridges, the connection between the steel girder and the concrete bridge deck is one of the key technologies. Traditional steel plate composite girder bridges mostly use reinforced concrete decks, but with the popularization and application of bridges with few main girders and the gradual increase of the distance between main girders, it is difficult for reinforced concrete decks to meet the design requirements of long-span bridge decks. Steel-concrete composite bridges The panel has a large bending stiffness and bearing capacity, which can effectively realize the design and application of the bridge deck with a large span. The steel-concrete composite bridge deck has many performance advantages of reinforced concrete bridge deck and steel bridge deck, and the steel plate can act as the bottom formwork in the prefabrication process. At the same time, the steel-concrete composite bridge deck has better durability than the reinforced concrete deck, which can effectively slow down the severe durability damage of the bridge deck. Therefore, it is necessary to design a prefabricated steel plate composite girder bridge and its construction method based on steel-concrete composite bridge deck with reasonable design, simple construction, good use effect and excellent mechanical properties. The installation and disassembly construction speed is fast, the construction period is short, and It can effectively solve the problem of too large distance between main girders.

Contents of the invention

The technical problem to be solved by the present invention is to provide an assembled steel plate composite girder bridge based on the steel-concrete composite bridge deck, which has simple structure, reasonable design, easy construction, good use effect and excellent mechanical properties. Excellent, fast installation and disassembly construction, short construction period, and can effectively solve the problem of excessive main beam spacing.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an assembled steel plate composite girder bridge based on steel-concrete composite bridge deck, which is characterized in that: it includes multiple steel girders that are all arranged on the same horizontal plane. The main girder support structure and a plurality of steel-concrete composite bridge deck sections installed on the main girder support structure from front to back, and the plurality of steel girders are I-steel main girders arranged along the longitudinal bridge direction, Each of the steel girders is spliced by a plurality of steel girder segments, and the plurality of steel girder segments are arranged on the same horizontal plane from back to front along the longitudinal bridge direction; a plurality of the steel-concrete composite bridge decks The sections have the same structure and they are arranged on the same level from back to front along the longitudinal direction of the bridge; each of the steel-concrete composite bridge deck segments includes multiple The steel-concrete composite bridge deck unit, the left and right sides of each steel-concrete composite bridge deck unit are respectively supported on two adjacent steel girders; A vertical cast-in-place concrete structure arranged horizontally, the two adjacent steel-concrete composite deck units on the left and right are connected by a longitudinal cast-in-place concrete structure, and the longitudinal cast-in-place concrete structure is arranged along the longitudinal direction of the bridge and located directly above the steel girder;

The steel-concrete composite bridge deck unit includes a bottom steel plate, a transverse stiffening structure arranged on the bottom steel plate, a plurality of prefabricated bridge deck steel bars that pass through the transverse stiffening structure from left to rear along the transverse bridge direction, and The prefabricated concrete slab poured on the bottom steel plate, the transverse stiffening structure includes multiple opening stiffeners arranged on the bottom steel plate from back to front along the longitudinal bridge direction, and the multiple opening stiffening ribs are all Arranged along the direction of the transverse bridge and all of them are on the same horizontal plane, multiple channels of the opening stiffeners and multiple prefabricated bridge deck steel bars are poured in the prefabricated concrete slab; the structure and size of the multiple channels of the opening stiffeners All are the same, each said opening stiffener is a long strip steel plate that is all arranged vertically, and the middle part of the strip steel plate has a plurality of steel bar perforations from left to right; the bottom steel plate includes The horizontal bottom steel plate and two steel plate connection structures symmetrically arranged on the left and right sides of the horizontal bottom steel plate, the horizontal bottom steel plate is a rectangular steel plate, and each of the steel plate connection structures includes a plurality of connecting bolts fixed to the steel main girder The steel plate connection strip on the top and the transition steel strip connected between the horizontal bottom steel plate and the steel plate connection strip, the steel plate connection strip is arranged horizontally and has a plurality of first bolt installation holes for the connection bolts to be installed on it. The connecting bolts are arranged from back to front along the longitudinal bridge, and the height of the steel plate connecting strip is lower than the height of the horizontal bottom steel plate; multiple opening stiffeners are welded and fixed on the horizontal bottom steel plate, and the prefabricated The concrete slab is a rectangular concrete slab directly above the horizontal bottom steel plate, and each of the prefabricated bridge deck steel bars passes through the steel bars on the multiple opening stiffeners from the back to the front;

The left and right sides of the upper wing plate of each said steel girder are provided with a row of second bolt installation holes for connecting bolts, and each row of said second bolt installation holes includes a plurality of The second bolt installation holes laid out; the upper flange of each steel girder and all the steel plate connection structures arranged on the upper flange form a forming formwork for the longitudinal cast-in-place concrete structure;

Two adjacent steel-concrete composite bridge deck units are connected by a horizontally arranged horizontal cast-in-place concrete structure, and the horizontal cast-in-place concrete structure is arranged along the direction of the bridge; the steel-concrete composite bridge deck units The front and rear ends of the bottom steel plate protrude to the outside of the precast concrete slab, and the sections where the front and rear ends of the bottom steel plate protrude to the outside of the precast concrete slab are steel plate extension sections; the front and rear adjacent two steel concrete slabs The prefabricated concrete slabs of the composite bridge deck unit and the steel-concrete composite bridge deck sections form the formwork of the horizontal cast-in-place concrete structure; cast as one

The upper surfaces of the prefabricated concrete slab, the longitudinal cast-in-place concrete structure and the transverse cast-in-place concrete structure are all flush.

The above-mentioned prefabricated steel plate composite girder bridge based on steel-concrete composite bridge deck is characterized in that: the bottom steel plates of two adjacent steel-concrete composite bridge deck units are fixedly connected by welding.

The above-mentioned prefabricated steel plate composite girder bridge based on steel-concrete composite bridge deck is characterized in that: the transitional steel strips are inclined steel strips that gradually slope downward from the inside to the outside, and the steel plate connecting strips and the transitional steel strips are both rectangular Steel strips; the bottom steel plate is formed by bending a rectangular steel plate.

The above-mentioned prefabricated steel plate composite girder bridge based on steel-concrete composite bridge deck is characterized in that: the left and right ends of the opening stiffeners protrude to the outside of the precast concrete slab, and the left and right ends of the opening stiffeners protrude The section to the outside of the precast concrete slab is the overhanging section of the stiffener, and the length of the overhanging section of the stiffener is half the width of the longitudinal cast-in-place concrete structure.

The above-mentioned prefabricated steel plate composite girder bridge based on the steel-concrete composite bridge deck is characterized in that: all the stiffener overhangs on the left side of the precast concrete slab in the steel-concrete composite bridge deck unit form a left stiffening group, and the steel In the composite composite bridge deck unit, all the stiffener extensions located on the right side of the precast concrete slab form the right stiffener group; All the right stiffening groups above the main steel girder form the right stiffening structure of the beam; the left stiffening structure of the beam and the right stiffening structure of the beam are provided with multiple longitudinal connecting steel bars from left to right, and more The longitudinal connecting reinforcements in each row are arranged horizontally and on the same horizontal plane, and each longitudinal connecting reinforcement passes from the left side of the beam to the front and from the left side of the beam or the reinforcement structure on the right side of the beam. The steel bars on the outstretched sections of the stiffeners are perforated through; the longitudinal connecting steel bars are poured in the longitudinal cast-in-place concrete structure.

The above-mentioned prefabricated steel plate composite girder bridge based on steel-concrete composite bridge deck is characterized in that: a plurality of said steel bar perforations are evenly arranged; each said opening stiffener includes a middle stiffener segment and two symmetrically connected The stretching ribs on the left and right sides of the middle stiffening rib segment, the steel bar on the middle stiffening rib segment is the first through hole for the prefabricated bridge deck steel bar to pass through, and the stiffening rib The steel bar perforation on the overhanging section is a second through hole for the longitudinal connecting steel bar to pass through.

The above-mentioned prefabricated steel plate composite girder bridge based on steel-concrete composite bridge deck is characterized in that: a row of shear studs are arranged on the left and right sides above the upper wing plate of each said steel girder, and each said upper wing plate The two rows of shear studs arranged are located between the two rows of second bolt installation holes opened on the upper flange; each row of shear studs includes multiple The shear studs are arranged vertically and their bottoms are welded and fixed on the upper flange; the two rows of shear studs are poured in the longitudinal cast-in-place concrete structure, and the two rows of shear studs The top heights of the force nails are all the same and lower than the upper surface height of the longitudinal cast-in-place concrete structure.

The above-mentioned prefabricated steel plate composite girder bridge based on steel-concrete composite bridge deck is characterized in that: the front and rear ends of each prefabricated bridge deck steel bar extend to the outside of the bottom steel plate, and the front and rear ends of the prefabricated bridge deck steel bar The segment extending from the end to the outside of the bottom steel plate is the overhanging section of the steel bar, and the length of the overhanging section of the steel bar is not more than half of the width of the transverse cast-in-place concrete structure.

The above-mentioned prefabricated steel plate composite girder bridge based on steel-concrete composite bridge deck is characterized in that: in each of the steel main girders, two adjacent steel girder segments are connected by welding.

At the same time, the present invention also discloses a construction method of an assembled steel plate composite girder bridge based on a steel-concrete composite bridge deck with simple steps, reasonable design, convenient implementation, and good use effect. The method is characterized in that the method includes the following steps:

Step 1. Construction of the lower supporting structure of the bridge: constructing the lower supporting structure of the constructed steel plate composite girder bridge;

The lower supporting structure includes a plurality of supporting piers arranged from rear to front along the longitudinal bridge direction;

Step 2. Steel main girder erection construction: on the lower support structure completed in step 1, multiple steel main girders are erected synchronously from back to front, and two adjacent steel main girders are completed. The splicing process between beams;

Step 3. Installation of steel-concrete composite bridge deck segments: install the multiple steel-concrete composite bridge deck segments respectively from back to front. The process is as follows:

Step 301, installation of the first steel-concrete composite bridge deck segment: installing the last steel-concrete composite bridge deck segment among the multiple steel-concrete composite bridge deck segments;

When installing the currently installed steel-concrete composite bridge deck segment, hoist all the steel-concrete composite bridge deck units in the steel-concrete composite bridge deck The left and right sides are respectively supported and fixed on two adjacent steel girders by a plurality of connecting bolts;

Step 302, installation of the next steel-concrete composite bridge deck segment: according to the method described in step 301, install the next steel-concrete composite bridge deck segment;

Step 303, repeating step 302 multiple times until the installation process of all steel-concrete composite bridge deck segments of the constructed steel plate composite girder bridge is completed;

Step 304, pouring construction of the horizontal cast-in-place concrete structure: performing pouring construction on the horizontal cast-in-place concrete structures between the steel-concrete composite bridge deck units in the two adjacent steel-concrete composite bridge deck sections;

Step 4. Longitudinal connecting steel bar piercing: After all steel-concrete composite bridge deck segments of the steel plate composite girder bridge constructed in Step 3 have been installed, all girder left stiffening structures and all girder right stiffening structures are pierced A plurality of said longitudinal connecting steel bars;

Step 5, pouring construction of the vertical cast-in-place concrete structure: perform pouring construction on the longitudinal cast-in-place concrete structure on each of the steel girders.

Compared with the prior art, the present invention has the following advantages:

1. The structure of the steel plate composite girder bridge adopted is simple, the design is reasonable and the construction cost is low.

2. The construction method of the steel plate composite girder bridge has simple steps, convenient construction and fast construction speed. The prefabricated steel girder section prefabricated units and steel-concrete composite bridge deck units are prefabricated in the factory; at the construction site, only the steel-concrete The composite bridge deck unit is fixed on the prefabricated unit of the steel girder segment by connecting bolts, and the horizontal cast-in-place concrete structure is poured, and then the longitudinal connecting steel bars are pierced above the steel girder, and the longitudinal cast-in-place concrete structure is poured. .

3. The structure of the steel-concrete composite bridge deck unit is simple, the design is reasonable, the prefabrication process is simple, and the mechanical performance is good. The bottom of the steel-concrete composite bridge deck unit is a bottom steel plate, which acts as a bottom formwork for concrete pouring during factory prefabrication ; The bottom steel plate and the precast concrete slab are connected as a whole through opening stiffeners to form a steel-concrete composite bridge deck. The steel-concrete composite bridge deck unit has relatively high flexural rigidity and bearing capacity, which can meet the conditions of double main girders or few main girders.

4. The cast-in-place position of the longitudinal cast-in-place concrete structure is located above the upper flange of the steel girder, which can effectively reduce the concrete pouring formwork; and the longitudinal connecting steel bars are installed in the stiffening structure on the left side of the beam or the stiffening structure on the right side of the beam, It can effectively ensure the accurate positioning of the longitudinal connecting steel bars.

5. The stiffener extension section of the opening stiffener goes deep into the joint between the left and right adjacent steel-concrete composite bridge deck units. Both the longitudinal connecting reinforcement and the longitudinal connecting reinforcement are poured in the longitudinal cast-in-place concrete structure, so that the connection between the left and right adjacent steel-concrete composite bridge deck units and the steel-concrete composite bridge deck unit are connected to form a whole and jointly bear the force.

6. The steel girder and the steel-concrete composite bridge deck unit are connected by connecting bolts, the construction is quick, and it is convenient for secondary replacement when the steel-concrete composite bridge deck unit is damaged. At the same time, the use of connecting bolts for connection can effectively ensure the overall performance of the steel main girder and the steel-concrete composite bridge deck unit.

7. The steel plate composite girder bridge used connects the steel-concrete composite bridge deck unit with the steel main girder through connecting bolts, and the longitudinal bridge direction connects the front and rear adjacent steel-concrete composite bridge deck units by welding, so the construction speed is fast. It is convenient for rapid assembly and secondary replacement of bridge decks, and at the same time simplifies the connection structure between adjacent transverse bridge decks, ensuring construction speed and construction quality.

8. The steel plate composite girder bridge adopted has high practical value, its structure is simple, the design is reasonable, the use effect is good, and the force is reasonable. The application of the steel-concrete composite bridge deck unit increases the bending stiffness and bearing capacity of the composite beam, which is suitable for Prefabricated steel plate composite girder bridge with double main girders or few main girders.

To sum up, the present invention is reasonable in design, easy in construction, good in use effect, and excellent in mechanical properties. The assembled steel plate composite girder bridge and its construction method based on steel-concrete composite bridge deck have fast installation and disassembly construction speed and short construction period. And it can effectively solve the problem of too large distance between main girders.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a sectional view along line A-A of Fig. 1 .

Fig. 3 is a schematic diagram of the layout position of the horizontal cast-in-place concrete structure of the present invention.

Fig. 4 is a structural schematic diagram of a steel-concrete composite bridge deck unit of the present invention.

Fig. 5 is a structural schematic diagram of a steel beam segment prefabricated unit of the present invention.

Fig. 6 is a flow chart of the method for constructing the assembled steel plate composite girder bridge according to the present invention.

Explanation of reference signs:

1—steel-concrete composite bridge deck unit; 1-1—horizontal bottom plate; 1-2—transitional steel strip;

1-3—steel plate connecting strip; 1-4—the first bolt installation hole;

1-5—opening stiffener; 1-6—first through hole; 1-7—second through hole;

1-8—prefabricated bridge deck reinforcement; 1-9—precast concrete slab; 2—steel girder segment;

2-1—second bolt mounting hole; 3—shear stud; 4—connecting bolt;

5—longitudinal connecting reinforcement; 6—longitudinal cast-in-place concrete structure;

7—Lateral cast-in-place concrete structure.

detailed description

As shown in Fig. 1, Fig. 2 and Fig. 3, the prefabricated steel plate composite girder bridge based on the steel-concrete composite bridge deck includes a main girder support structure composed of multiple steel girders arranged on the same horizontal plane and multiple The steel-concrete composite bridge deck section installed on the main girder support structure from front to back, the multiple steel main girders are I-shaped steel main girders arranged along the longitudinal bridge direction, and each steel main girder is It is spliced by a plurality of steel girder segments 2, and the plurality of steel girder segments 2 are arranged on the same horizontal plane from back to front along the longitudinal bridge direction; the structures of the plurality of steel-concrete composite bridge deck segments are the same And it is arranged on the same horizontal plane from back to front along the longitudinal bridge direction; each of the steel-concrete composite bridge deck segments includes a plurality of steel-concrete composite bridge decks arranged on the same horizontal plane from left to right along the transverse bridge direction Unit 1, the left and right sides of each steel-concrete composite bridge deck unit 1 are respectively supported on two adjacent steel girders; directly above each steel girder are horizontally arranged A longitudinal cast-in-place concrete structure 6, and two adjacent steel-concrete composite bridge deck units 1 on the left and right are connected by a longitudinal cast-in-place concrete structure 6. The longitudinal cast-in-place concrete structure 6 is arranged along the longitudinal direction of the bridge and is located at directly above the steel girder;

As shown in Fig. 2, Fig. 4 and Fig. 5, the steel-concrete composite bridge deck unit 1 includes a bottom steel plate, a transverse stiffening structure arranged on the bottom steel plate, and a plurality of stiffeners passing through from left to rear along the direction of the transverse bridge. The prefabricated bridge deck steel bars 1-8 in the transverse stiffening structure and the prefabricated concrete slabs 1-9 poured on the bottom steel plate, the transverse stiffening structure includes multiple roads arranged along the longitudinal direction of the bridge from back to front The opening stiffeners 1-5 on the bottom steel plate, the plurality of opening stiffeners 1-5 are arranged along the transverse bridge direction and are all on the same horizontal plane, and the plurality of opening stiffeners 1-5 are connected with the A plurality of prefabricated bridge deck steel bars 1-8 are all poured in the precast concrete slab 1-9; the structure and size of the plurality of opening stiffeners 1-5 are the same, and each of the opening stiffeners 1-5 5 are all elongated steel plates that are arranged vertically, and the middle part of the elongated steel plate has a plurality of steel bar perforations from left to right; the bottom steel plate includes a horizontal bottom steel plate 1-1 and two symmetrical The steel plate connection structures arranged on the left and right sides of the horizontal bottom steel plate 1-1, the horizontal bottom steel plate 1-1 is a rectangular steel plate, each of the steel plate connection structures includes a plurality of connecting bolts 4 fixed to the steel main beam The steel plate connecting strip 1-3 on the top and the transitional steel strip 1-2 connected between the horizontal bottom steel plate 1-1 and the steel plate connecting strip 1-3, the steel plate connecting strip 1-3 is arranged horizontally and has a A plurality of first bolt installation holes 1-4 for the installation of the connecting bolts 4, the plurality of connecting bolts 4 are laid out from back to front along the longitudinal bridge direction, and the height of the steel plate connecting strips 1-3 is lower than the horizontal bottom steel plate The height of 1-1; the plurality of opening stiffeners 1-5 are all welded and fixed on the horizontal bottom steel plate 1-1, and the prefabricated concrete slab 1-9 is a rectangular concrete located directly above the horizontal bottom steel plate 1-1 plate, each of the prefabricated bridge deck steel bars 1-8 is perforated through the steel bars on the multiple opening stiffeners 1-5 from the rear to the front;

There is a row of second bolt installation holes 2-1 for the installation of connecting bolts 4 on the left and right sides of the upper wing plate of each said steel girder. The second bolt installation holes 2-1 of each row include a plurality of The second bolt installation hole 2-1 arranged from the rear to the front of the longitudinal bridge; the upper flange of each steel girder and all the steel plate connection structures arranged on the upper flange form a longitudinal cast-in-place concrete structure 6 molding template;

Two adjacent steel-concrete composite bridge deck units 1 are connected by a horizontally arranged horizontal cast-in-place concrete structure 7, and the horizontal cast-in-place concrete structure 7 is arranged along the direction of the bridge; the steel-concrete composite bridge The front and rear ends of the bottom steel plate in the panel unit 1 protrude to the outside of the precast concrete slab 1-9, and the sections where the front and rear ends of the bottom steel plate protrude to the outside of the precast concrete slab 1-9 are steel plate extension sections The prefabricated concrete slabs 1-9 of the two steel-concrete composite bridge deck units 1 adjacent to each other and the steel-concrete composite bridge deck section form the forming formwork of the horizontal cast-in-place concrete structure 7; each of the horizontal cast-in-place The concrete structure 7 is integrated with the longitudinal cast-in-place concrete structure 6 located on the left and right sides;

The upper surfaces of the prefabricated concrete slabs 1-9, the longitudinal cast-in-place concrete structure 6 and the transverse cast-in-place concrete structure 7 are all flush.

In this embodiment, the bottom steel plates of two adjacent steel-concrete composite bridge deck units 1 are fixedly connected by welding.

In this way, transverse welding seams are formed between the bottom steel plates of two adjacent steel-concrete composite bridge deck units 1 .

In this embodiment, the transitional steel strip 1-2 is an inclined steel strip that gradually slopes downward from the inside to the outside, and the steel connecting strip 1-3 and the transitional steel strip 1-2 are rectangular steel strips; The bottom steel plate is formed by bending a rectangular steel plate.

In this embodiment, the left and right ends of the opening stiffener 1-5 extend to the outside of the precast concrete slab 1-9, and the left and right ends of the opening stiffener 1-5 extend to the precast concrete slab 1 The segment on the outside of -9 is the overhanging section of the stiffener, and the length of the overhanging section of the stiffener is half of the width of the longitudinal cast-in-place concrete structure 6 . Therefore, the outer end of the overhanging section of the stiffener is located directly above the longitudinal centerline of the steel girder.

In order to connect reliably, the opening stiffeners 1-5 adjacent to the left and right are connected by welding.

In this embodiment, all the stiffener overhangs on the left side of the precast concrete slab 1-9 in the steel-concrete composite bridge deck unit 1 form a left stiffening group, and the steel-concrete composite bridge deck unit 1 located on the left side of the precast concrete All the stretching sections of stiffeners on the right side of plate 1-9 form the right stiffening group; all the left stiffening groups located above the same steel main girder form the left stiffening structure of the beam, which are located above the same steel main girder All the right side stiffening groups of the beam form the right side stiffening structure of the beam; the left side stiffening structure of the beam and the right side stiffening structure of the beam are all pierced with multiple longitudinal connection steel bars 5 from left to right, and the multiple longitudinal connection The steel bars 5 are all arranged horizontally and on the same horizontal plane, and each of the longitudinal connecting steel bars 5 is connected from the back to the front from the left side of the beam or the plurality of the beams in the right side of the beam. The reinforcing bars on the outstretched sections of the stiffeners are perforated; the longitudinal connecting reinforcing bars 5 are poured into the longitudinal cast-in-place concrete structure 6 .

In this embodiment, a plurality of steel bar perforations are evenly arranged; each of the opening stiffeners 1-5 includes a middle stiffener segment and two symmetrically connected left and right sides of the middle stiffener segment. In the stretching section of the stiffener, the steel bar on the middle stiffening section is perforated as the first through hole 1-6 for the steel bar 1-8 of the prefabricated bridge deck to pass through. The steel bar perforation is the second through hole 1-7 for the longitudinal connecting steel bar 5 to pass through.

As shown in Figures 2 and 5, in this embodiment, a row of shear studs 3 is arranged on the left and right sides above the upper flange of each said steel girder, and two columns of shear studs 3 arranged on each said upper flange The shear studs 3 are all located between the two rows of the second bolt installation holes 2-1 opened on the upper wing; The shear studs 3 arranged, the shear studs 3 are arranged vertically and their bottoms are welded and fixed on the upper flange; the two rows of shear studs 3 are poured in the longitudinal cast-in-place concrete structure 6, The top heights of the two rows of shear studs 3 are the same and lower than the upper surface height of the vertical cast-in-place concrete structure 6 .

During actual construction, when the steel beam segment 2 is processed, two rows of the shear studs 3 need to be welded and fixed on the upper flange of the steel beam segment 2 simultaneously. Moreover, each steel beam segment 2 and two rows of shear studs 3 welded thereon constitute a steel beam segment prefabricated unit.

In this embodiment, the front and rear ends of each prefabricated bridge deck steel bar 1-8 extend to the outside of the bottom steel plate, and the front and rear ends of the prefabricated bridge deck steel bars 1-8 stick out to the bottom steel plate The outer section is the overhanging section of the steel bar, and the length of the overhanging section of the steel bar is not more than half of the width of the transverse cast-in-place concrete structure 7 .

In this embodiment, two adjacent steel beam segments 2 in front and back of each steel main beam are connected by welding.

During actual construction, the longitudinal connecting steel bar 5 is a longitudinally stressed steel bar and its front and rear ends are respectively anchored to the left and right sides of the longitudinal cast-in-place concrete structure 6 .

In this embodiment, the connecting bolts 4 are arranged vertically.

Moreover, the connecting bolt 4 includes a screw rod with a nut on the upper end and a nut installed on the screw rod, and the nut is located under the upper wing plate of the steel girder.

A construction method for a prefabricated steel plate composite girder bridge based on a steel-concrete composite bridge deck as shown in Figure 6 includes the following steps:

Step 1. Construction of the lower supporting structure of the bridge: constructing the lower supporting structure of the constructed steel plate composite girder bridge;

The lower supporting structure includes a plurality of supporting piers arranged from rear to front along the longitudinal bridge direction;

Step 2. Steel main girder erection construction: on the lower support structure completed in step 1, multiple steel main girders are erected synchronously from back to front, and two adjacent steel main girders are completed. The splicing process between beams;

During actual construction, the two adjacent steel girders are spliced together by multiple horizontal connecting beams arranged along the direction of the transverse bridge, and the multiple horizontal connecting beams are arranged along the longitudinal bridge direction from back to front, so The horizontal connecting beam is a horizontal steel beam and is fixedly connected with the steel main beam by welding;

Step 3. Installation of steel-concrete composite bridge deck segments: install the multiple steel-concrete composite bridge deck segments respectively from back to front. The process is as follows:

Step 301, installation of the first steel-concrete composite bridge deck segment: installing the last steel-concrete composite bridge deck segment among the multiple steel-concrete composite bridge deck segments;

When installing the currently installed steel-concrete composite bridge deck segment, hoist all the steel-concrete composite bridge deck units 1 in the steel-concrete composite bridge deck segment into place respectively, and place each steel-concrete composite bridge deck unit The left and right sides of 1 are respectively supported and fixed on two adjacent steel girders by a plurality of connecting bolts 4;

Step 302, installation of the next steel-concrete composite bridge deck segment: according to the method described in step 301, install the next steel-concrete composite bridge deck segment;

Step 303, repeating step 302 multiple times until the installation process of all steel-concrete composite bridge deck segments of the constructed steel plate composite girder bridge is completed;

Step 304, pouring construction of the horizontal cast-in-place concrete structure: performing pouring construction on the horizontal cast-in-place concrete structure 7 between the steel-concrete composite bridge deck units 1 in the two adjacent steel-concrete composite bridge deck sections;

Step 4. Longitudinal connecting steel bar piercing: After all steel-concrete composite bridge deck segments of the steel plate composite girder bridge constructed in Step 3 have been installed, all girder left stiffening structures and all girder right stiffening structures are pierced Multiple longitudinal connecting reinforcement bars 5;

Step 5, pouring construction of the longitudinal cast-in-place concrete structure: perform pouring construction on the longitudinal cast-in-place concrete structure 6 on each steel girder.

Before actual construction, all steel-concrete composite bridge deck units 1 and all steel girder segment prefabricated units required for the steel plate composite girder bridge to be constructed are processed separately in the processing plant.

Wherein, when the steel-concrete composite bridge deck unit 1 is prefabricated, a plurality of opening stiffeners 1-5 are first welded and fixed on the pre-processed bottom steel plate, and the stiffening ribs 1-5 are formed by multiple openings. The transverse stiffening structure composed of ribs 1-5 is pierced with a plurality of prefabricated bridge deck steel bars 1-8, and then concrete is poured on the bottom steel plate to obtain a prefabricated concrete slab 1-9 to complete the steel-concrete composite bridge Prefabrication process of panel unit 1.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical aspects of the present invention. within the scope of protection of the scheme.

Claims (10)

1. A prefabricated steel plate composite girder bridge based on a steel-concrete composite bridge deck, characterized in that: it includes a main girder support structure composed of multiple steel girders all laid on the same horizontal plane and a plurality of front-to-back installations. In the steel-concrete composite bridge deck section on the main girder support structure, the multiple steel main girders are I-shaped steel main girders arranged along the longitudinal bridge direction, and each steel main girder is composed of multiple steel girders. Beam segments (2) are spliced together, and multiple steel girder segments (2) are arranged on the same horizontal plane from back to front along the longitudinal bridge direction; multiple steel-concrete composite bridge deck segments have the same structure And it is arranged on the same horizontal plane from back to front along the longitudinal bridge direction; each of the steel-concrete composite bridge deck segments includes a plurality of steel-concrete composite bridge decks arranged on the same horizontal plane from left to right along the transverse bridge direction unit (1), the left and right sides of each steel-concrete composite bridge deck unit (1) are respectively supported on two adjacent steel girders; The vertical cast-in-place concrete structure (6) is horizontally arranged, and the two adjacent steel-concrete composite bridge deck units (1) on the left and right are connected by the longitudinal cast-in-place concrete structure (6), and the longitudinal cast-in-place concrete The structure (6) is arranged along the longitudinal bridge direction and is located directly above the steel girder; The steel-concrete composite bridge deck unit (1) includes a bottom steel plate, a transverse stiffening structure arranged on the bottom steel plate, and a plurality of prefabricated bridges passing through the transverse stiffening structure from left to rear along the transverse bridge direction The panel reinforcement (1-8) and the prefabricated concrete slab (1-9) poured on the bottom steel plate, the transverse stiffening structure includes a plurality of openings arranged on the bottom steel plate from back to front along the longitudinal bridge direction. Hole stiffeners (1-5), the plurality of opening stiffeners (1-5) are arranged along the transverse bridge direction and are all on the same horizontal plane, the plurality of opening stiffeners (1-5) and A plurality of prefabricated bridge deck steel bars (1-8) are poured in the prefabricated concrete slab (1-9); the structure and size of the plurality of said opening stiffeners (1-5) are the same, each said The opening stiffeners (1-5) are all elongated steel plates arranged vertically, and the middle part of the elongated steel plates is perforated with a plurality of steel bars from left to right; the bottom steel plate includes a horizontal bottom The steel plate (1-1) and two steel plate connection structures arranged symmetrically on the left and right sides of the horizontal bottom steel plate (1-1), the horizontal bottom steel plate (1-1) is a rectangular steel plate, each of the steel plate connection structures It includes a steel plate connection strip (1-3) fixed on the steel main beam through a plurality of connection bolts (4) and a transition between the horizontal bottom steel plate (1-1) and the steel plate connection strip (1-3) Steel strips (1-2), the steel strips (1-3) are arranged horizontally and have a plurality of first bolt mounting holes (1-4) for the installation of the connecting bolts (4). The connecting bolts (4) are arranged along the longitudinal bridge from back to front, and the height of the steel plate connecting strips (1-3) is lower than the height of the horizontal bottom steel plate (1-1); (1-5) are all welded and fixed on the horizontal bottom steel plate (1-1), and the described prefabricated concrete slab (1-9) is a rectangular concrete slab directly above the horizontal bottom steel plate (1-1). The prefabricated bridge deck steel bars (1-8) are all perforated through the steel bars on the multiple described opening stiffeners (1-5) from back to front; The left and right sides of the upper wing plate of each said steel girder all have a row of second bolt installation holes (2-1) for the installation of connecting bolts (4), and the second bolt installation holes (2-1) of each row are installed. ) all include a plurality of said second bolt installation holes (2-1) arranged from back to front along the longitudinal bridge direction; the upper flange of each said steel girder is connected with all the steel plates arranged on the upper flange Structural composition formwork of longitudinal cast-in-place concrete structure (6); Two adjacent steel-concrete composite bridge deck units (1) in the front and back are connected by horizontally arranged horizontal cast-in-place concrete structures (7), and the horizontally arranged cast-in-place concrete structures (7) are arranged along the direction of the transverse bridge; The front and rear ends of the bottom steel plate in the steel-concrete composite bridge deck unit (1) extend to the outside of the precast concrete slab (1-9), and the front and rear ends of the bottom steel plate extend to the precast concrete slab (1-9). -9) The outer segment is a steel plate extension section; the prefabricated concrete slabs (1-9) of the two adjacent steel-concrete composite bridge deck units (1) and the steel-concrete composite bridge deck segment form a transverse direction Formwork for the cast-in-place concrete structure (7); each of the horizontal cast-in-place concrete structures (7) is integrated with the longitudinal cast-in-place concrete structures (6) located on its left and right sides; The upper surfaces of the prefabricated concrete slabs (1-9), the longitudinal cast-in-place concrete structure (6) and the transverse cast-in-place concrete structure (7) are all flush. 2. The assembled steel plate composite girder bridge based on steel-concrete composite bridge deck according to claim 1, characterized in that: between the bottom steel plates of two adjacent steel-concrete composite bridge deck units (1) front and back Fixed connection by welding. 3. The assembled steel plate composite girder bridge based on steel-concrete composite bridge deck according to claim 1 or 2, characterized in that: the transitional steel strips (1-2) are inclined gradually downward from inside to outside Steel strips, the steel strips connecting strips (1-3) and transition steel strips (1-2) are rectangular steel strips; the bottom steel plate is formed by bending a rectangular steel plate. 4. The assembled steel plate composite girder bridge based on steel-concrete composite bridge deck according to claim 1 or 2, characterized in that: the left and right ends of the opening stiffeners (1-5) extend to the precast concrete On the outside of the slab (1-9), the segment at the left and right ends of the opening stiffener (1-5) protruding to the outside of the precast concrete slab (1-9) is the stretching section of the stiffener. The length of the extension is half of the width of the vertical cast-in-place concrete structure (6). 5. The assembled steel plate composite girder bridge based on the steel-concrete composite bridge deck according to claim 4, characterized in that: the steel-concrete composite bridge deck unit (1) is located on the left side of the precast concrete slab (1-9) All the stretching ribs of the steel-concrete bridge deck unit (1) on the right side of the precast concrete slab (1-9) form the stiffening group on the right side; All the left stiffening groups above the steel main girder in the same pass form the left stiffening structure of the beam, and all the right stiffening groups above the steel main girder in the same pass form the right stiffening structure of the beam; the left stiffening structure of the beam and the stiffening structure on the right side of the beam are all pierced with multiple longitudinal connecting reinforcements (5) from left to right, and the multiple longitudinal connecting reinforcements (5) are all arranged horizontally and on the same horizontal plane, each The said longitudinal connecting steel bars (5) all pass from the rear to the front through the steel bar perforations on a plurality of said stiffening ribs in the stiffening structure on the left side of the beam or the stiffening structure on the right side of the beam; The longitudinal connecting steel bars (5) are poured in the longitudinal cast-in-place concrete structure (6). 6. The assembled steel plate composite girder bridge based on steel-concrete composite bridge deck according to claim 5, characterized in that: a plurality of said steel bar perforations are evenly arranged; each said opening stiffener (1-5) Each includes a central stiffener section and two outstretched sections of the stiffener symmetrically connected to the left and right sides of the central stiffener section. The first through hole (1-6) through which the reinforcing bar (1-8) passes, and the perforation of the reinforcing bar on the extended section of the stiffener is the second through hole (1-6) for the longitudinal connection reinforcing bar (5) to pass through 7). 7. The assembled steel plate composite girder bridge based on the steel-concrete composite bridge deck according to claim 1 or 2, characterized in that: a column of shear forces is arranged on the left and right sides above the upper wing plate of each said steel girder Nails (3), the two rows of shear studs (3) arranged on each of the upper flanges are located between the two rows of second bolt mounting holes (2-1) on the upper flange The shear studs (3) of each column all include a plurality of shear studs (3) arranged from back to front along the longitudinal bridge direction, and the shear studs (3) are arranged vertically and their bottoms are fixed by welding On the upper wing plate; the shear studs (3) of the two rows are all poured in the longitudinal cast-in-place concrete structure (6), and the top heights of the shear studs (3) of the two rows are all the same and their top heights are lower than the upper surface height of the vertical cast-in-place concrete structure (6). 8. The assembled steel plate composite girder bridge based on steel-concrete composite bridge deck according to claim 1 or 2, characterized in that: the front and rear ends of each said prefabricated bridge deck reinforcement (1-8) all extend to On the outer side of the bottom steel plate, the front and rear ends of the prefabricated bridge deck steel bars (1-8) protrude to the outer side of the bottom steel plate. Pouring half of the width of the concrete structure (7). 9. According to claim 1 or 2, the assembled steel plate composite girder bridge based on the steel-concrete composite bridge deck, is characterized in that: two adjacent steel girder sections (2 ) are connected by welding. 10. A method for constructing a prefabricated steel plate composite girder bridge as claimed in claim 5, characterized in that the method comprises the following steps: Step 1. Construction of the lower supporting structure of the bridge: constructing the lower supporting structure of the constructed steel plate composite girder bridge; The lower supporting structure includes a plurality of supporting piers arranged from rear to front along the longitudinal bridge direction; Step 2. Steel main girder erection construction: on the lower support structure completed in step 1, multiple steel main girders are erected synchronously from back to front, and two adjacent steel main girders are completed. The splicing process between beams; Step 3. Installation of steel-concrete composite bridge deck segments: install the multiple steel-concrete composite bridge deck segments respectively from back to front. The process is as follows: Step 301, installation of the first steel-concrete composite bridge deck segment: installing the last steel-concrete composite bridge deck segment among the multiple steel-concrete composite bridge deck segments; When installing the currently installed steel-concrete composite bridge deck segment, hoist all the steel-concrete composite bridge deck units (1) in the steel-concrete composite bridge deck segment into place respectively, and place each steel-concrete composite bridge deck The left and right sides of the panel unit (1) are respectively supported and fixed on two adjacent steel girders by a plurality of connecting bolts (4); Step 302, installation of the next steel-concrete composite bridge deck segment: according to the method described in step 301, install the next steel-concrete composite bridge deck segment; Step 303, repeating step 302 multiple times until the installation process of all steel-concrete composite bridge deck segments of the constructed steel plate composite girder bridge is completed; Step 304, pouring construction of the horizontal cast-in-place concrete structure: performing pouring construction on the horizontal cast-in-place concrete structures (7) between the steel-concrete composite bridge deck units (1) in the two adjacent steel-concrete composite bridge deck sections; Step 4. Longitudinal connecting steel bar piercing: After all steel-concrete composite bridge deck segments of the steel plate composite girder bridge constructed in Step 3 have been installed, the reinforcement structures on the left side of all girders and the stiffening structures on the right side of all girders are pierced A plurality of said longitudinal connecting reinforcement bars (5); Step 5, pouring construction of the longitudinal cast-in-place concrete structure: perform pouring construction on the longitudinal cast-in-place concrete structure (6) on each steel girder.