CN111501521A - A prefabricated aluminum alloy prestressed truss bridge - Google Patents

Abstract

The invention relates to the technical field of bridge construction, and in particular to an assembled aluminum alloy prestressed truss bridge. , the two groups of the main truss beam pieces are arranged in parallel and spaced apart, and a plurality of the large beam pieces, a plurality of the small beam pieces and a plurality of the longitudinal beams are arranged between the two groups of the main truss beam piece components; Prestressed cable assemblies are provided on the faces of the two large cross beams located at both ends of the two sets of main truss beam assemblies away from each other. The beneficial effects of the present invention are as follows: the present invention reduces a series of problems in on-site processing, facilitates construction, and can be assembled and formed modularly; the aluminum alloy truss and the prestressed cable assembly are jointly stressed, on the one hand, it helps to resist the tension of the lower chord of the bridge, It is more to tighten the bridge to improve the stiffness of the bridge, solve the problem of insufficient stiffness of the aluminum alloy bridge and the slight shaking of the bridge body, and improve the comfort of pedestrian bridges.

Description

A prefabricated aluminum alloy prestressed truss bridge

technical field

The invention relates to the technical field of bridge construction, in particular to an assembled aluminum alloy prestressed truss bridge.

Background technique

In the process of urban construction and development, bridge construction is a key link. Among them, the rapid development of pedestrian bridges is due to the unique advantages of pedestrian bridges, which play an important role in ensuring the safety of pedestrians crossing the street and improving urban traffic. But often the pedestrian bridge itself is a major source of congestion in the construction stage, so the main direction of the development of the pedestrian bridge is the assembly type. In the past, prefabricated pedestrian bridges were mostly concrete or steel bridges. The weight of the assembled section of the concrete bridge is high. Prefabricated components require large-scale equipment transportation and hoisting; steel bridges are prone to corrosion, poor durability, and high maintenance costs in the later period, which will increase the project cost.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an assembled aluminum alloy prestressed truss bridge. Adding prestressed cable components can improve the mechanical performance of the bridge. The prestressed cable components are arranged on the tension side of the bridge, which can greatly improve the performance of the bridge. The stress distribution of the aluminum alloy increases the stiffness of the bridge body and improves the comfort of pedestrians passing through the bridge.

The technical solution of the present invention to solve the above technical problems is as follows: an assembled aluminum alloy prestressed truss bridge, comprising two sets of main truss girder pieces, a plurality of large beam pieces, a plurality of small beam pieces, a plurality of longitudinal beams, a plurality of The node connection mechanism and the prestressed cable assembly, the two groups of main truss beam pieces, a plurality of large beam pieces, a plurality of small beam pieces and a plurality of longitudinal beams are all made of aluminum alloy, and the two groups of the main truss beam piece components are parallel and arranged at intervals, a plurality of the large beam pieces, a plurality of the small beam pieces and a plurality of the longitudinal beams are arranged between the two groups of the main truss beam piece assemblies;

A plurality of the large beam pieces are evenly spaced, and the two sides are respectively fixedly connected with the two groups of the main truss beam pieces through the node connection mechanism, and the two ends of the two groups of the main truss beam pieces are respectively connected. is provided with the large beam piece;

The small beam pieces are arranged between the two adjacent large beam pieces, and the two sides of the small beam pieces are respectively fixedly connected with the two groups of the main truss beam pieces through the first connection core assembly. ; The large beam piece and the adjacent small beam piece are fixedly connected through the longitudinal beam, and the two ends of the longitudinal beam are respectively connected with the large beam piece and the small beam piece through the second connecting core assembly. fixed connection;

The prestressed cable assemblies are provided on the faces of the two large beam pieces located at both ends of the two sets of main truss beam pieces that are far away from each other.

The beneficial effects of the present invention are: the main truss beam assembly, the large beam, the small beam and the longitudinal beam of the present invention are all processed in the factory, which reduces a series of problems in on-site processing, facilitates construction, and can be assembled and formed by modularization; The connection mechanism is spliced with the first and second connecting core components, which can ensure the overall stability of the bridge and improve the stiffness of the joints; the aluminum alloy truss and the prestressed cable components are cooperatively stressed, which on the one hand helps resist the lower chord of the bridge In tension, the bridge is more tensioned, which improves the stiffness of the bridge, solves the problem of insufficient stiffness of the aluminum alloy bridge and the slight shaking of the bridge body, and improves the comfort of pedestrian bridges.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, the main truss girder piece assembly includes a plurality of main truss girder pieces that are connected end to end in sequence and located on the same plane, and the main truss girder pieces at both ends of the two groups of the main truss girder piece assemblies are connected by the node. The large beam pieces are fixedly connected to the mechanism, and a large cross beam piece is arranged between two adjacent main truss beam pieces of the same group of the main truss beam piece assemblies, and one of the large cross beam pieces is provided. The sides are arranged between the two main truss girder pieces in a group of the main truss girder pieces and are respectively fixedly connected with the two main truss girder pieces through the node connecting mechanism. The other side is located between the two main truss girder pieces in another group of the main truss girder pieces and is respectively fixedly connected with the two main truss girder pieces through the node connecting mechanism, and the The small beam pieces are fixedly connected with the main truss beam pieces in the two sets of the main truss beam piece assemblies through the first connecting sleeve core assembly.

The beneficial effect of adopting the above-mentioned further scheme is: the main truss girder assembly is spliced by a plurality of main truss girder pieces, and is spliced and fixed with the large cross beam while splicing, which is convenient for the transportation of each component of the truss bridge on the one hand, and on the other hand , which can ensure the stability and firmness of the connection between the main truss beam and the large beam, and ensure the overall strength and rigidity of the truss bridge.

Further, the main truss beam piece includes an upper chord, a lower chord, a first straight web bar and a diagonal web bar, the upper chord and the lower chord are arranged horizontally, and the upper chord is arranged vertically above the lower chord , the first straight web rod is vertically arranged between the upper chord rod and the lower chord rod, and the top end of the first straight web rod is fixedly connected with the middle of the upper chord rod. The bottom end is fixedly connected with the middle part of the lower chord, both sides of the first straight web rod are provided with the diagonal web rods, and the top ends of the two diagonal web rods are fixedly connected with the middle part of the upper chord rod , the bottom ends of the two inclined web bars are respectively fixedly connected with the two ends of the lower chord; The bottom end is fixedly connected with a first fixing hole, the two ends of the upper chord are provided with a second fixing hole for fixedly connecting with the top end of the side of the large beam piece through the node connecting mechanism, and the first straight belly The lower end of the rod is provided with a third fixing hole for fixedly connecting with the small beam piece through the first connecting sleeve core assembly.

The beneficial effect of the above-mentioned further scheme is that the upper chord and the lower chord are fixedly connected through the first straight web rod and the inclined web rod, which can ensure the strength of a single main truss beam and facilitate the connection between the main truss beams.

Further, the large beam piece includes two vertically spaced second straight web rods, and two horizontal and vertically spaced first cross beams are arranged between the two second straight web rods. A vertically arranged first vertical beam is arranged between the first horizontal beams, two ends of the first vertical beam are respectively fixedly connected with the middle parts of the two first horizontal beams, and both sides of the first vertical beam are provided with There are first inclined beams, the top ends of the two first inclined beams are respectively fixedly connected with the two ends of the first beam located above, and the bottom ends of the two first inclined beams are The middle part of the first beam is fixedly connected; both ends of the top and bottom of the two second straight web rods are provided with fourth fixing holes for connecting the main truss beam components through the node connecting mechanism, and the two The bottom end of the second straight web is further provided with a prestressed cable hole for connecting the prestressed cable assembly and a fifth fixing hole for connecting the main truss girder assembly through the node connecting mechanism, located at The middle part of the upper first cross beam is provided with a sixth fixing hole for fixing and connecting the longitudinal beam through the second connecting sleeve core assembly.

The beneficial effect of adopting the above-mentioned further scheme is: the two vertically arranged second straight web rods are fixedly connected through the first beam, the first vertical beam and the first inclined beam, and the two second straight web rods are respectively connected with the two groups of The main truss beam component is fixedly connected to ensure the firmness and stability of the connection between the large beam and the main truss beam component. At the same time, the large beam has sufficient strength to support the bridge deck.

Further, the small beam piece includes two second beams arranged horizontally and spaced up and down, a second vertical beam arranged vertically between the two second beams, the top and bottom ends of the second vertical beam They are respectively fixedly connected with the middle of the two second beams, the two sides of the second vertical beam are provided with second oblique beams, and the top ends of the two second oblique beams are respectively connected with the second beam located above. The two ends of the beam are fixedly connected, and the bottom ends of the two second inclined beams are fixedly connected with the middle of the second beam located below; A seventh fixing hole for fixedly connecting the first connecting core assembly and the main truss beam assembly, and the middle part of the second beam located above is provided with the second connecting core assembly for fixing with the longitudinal beam Connect the eighth fixing hole.

The beneficial effect of adopting the above-mentioned further scheme is that the arrangement of the small beam pieces can further improve the stability and strength of the connection between the two groups of main truss beam pieces, and at the same time further improve the supporting force of the bridge deck.

Further, the two second beams are square tubes, and the first connecting core assembly includes a first fixed steel plate and two first steel tubes for inserting into the ends of the two second beams, respectively. Each of the first steel pipes is arranged in parallel, and one end of each of them is fixedly connected to one side of the first fixed steel plate. Nine fixing holes, two of the first steel pipes are provided with a tenth fixing hole, and the tenth fixing hole is fixedly connected with the seventh fixing hole through a screw assembly.

The beneficial effect of adopting the above-mentioned further scheme is: the two ends of the two second beams of the small beam piece are respectively connected with one of the first steel pipes, and the same first connecting sleeve core component is connected with the two second beams to form a T Type joints, improve joint stiffness and reduce unnecessary drilling and bolt waste.

Further, the prestressed cable assembly includes an anchor plate, an anchor and a steel strand, one end of the steel strand is fixedly connected to the large beam piece through the anchor, and the anchor plate passes through the anchor Lock and fit on the large beam piece.

The beneficial effects of adopting the above-mentioned further scheme are: one end of the steel strand is fixedly connected with the large beam piece through the anchor, ensuring the strength of the connection between the prestressed cable assembly and the large beam piece, and ensuring that the entire truss bridge can be generated by the steel strand. Sufficient prestress to increase the stiffness of the truss bridge.

Further, the node connecting mechanism includes a gusset plate, the gusset plate is provided with a plurality of mounting holes for the screw assembly to pass through, and the gusset plate is connected to the main truss beam assembly and the large truss through the screw assembly. The beam piece is fixedly connected.

The beneficial effect of adopting the above-mentioned further scheme is: the main truss girder piece and the large beam piece are fixedly connected through the gusset plate, so as to ensure the stability of the connection and the rigidity of the joint at the same time, so that the strength of the aluminum material during welding is not affected by the strength of the welding point. degradation problem.

Further, the longitudinal beam is an aluminum alloy square tube, and both ends of the longitudinal beam are provided with eleventh fixing holes for being fixedly connected with the second connecting sleeve core assembly.

The beneficial effect of adopting the above-mentioned further scheme is that the longitudinal beam adopts aluminum alloy square tube, and both ends of the longitudinal beam have cavities, which are convenient for connection with the second connecting sleeve core assembly.

Further, the second connecting core assembly includes a second fixed steel plate and a second steel pipe for inserting into the end of the longitudinal beam, and one end of the second steel pipe is fixedly connected to one side of the second fixed steel plate, The second fixed steel plate is provided with a twelfth fixing hole for fixedly connecting with the large beam piece or the small beam piece through the screw assembly, the second steel pipe is provided with a thirteenth fixing hole, the The thirteenth fixing hole is fixedly connected with the eleventh fixing hole through the screw assembly.

The beneficial effect of adopting the above-mentioned further scheme is: inserting the second steel pipe into the end of the longitudinal beam, connecting through the screw assembly, and then fixing the second fixed steel plate with the large beam or the small beam, so as to facilitate the installation of the longitudinal beam, The strength of the installation can be ensured.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the main truss girder piece in the present invention;

Fig. 2 is the front view of the main truss girder piece in the present invention;

Fig. 3 is the three-dimensional structure schematic diagram of the large beam piece in the present invention;

Fig. 4 is the front view of the large beam piece in the present invention;

Fig. 5 is the side view of the large beam piece in the present invention;

Fig. 6 is the three-dimensional structure schematic diagram of the small beam piece in the present invention;

Fig. 7 is the front view of the small beam piece in the present invention;

Fig. 8 is the three-dimensional structure schematic diagram of the longitudinal beam in the present invention;

FIG. 9 is a schematic structural diagram of a node connecting mechanism in the present invention, and four embodiments of a node plate are provided in the drawing;

FIG. 10 is a schematic three-dimensional structure diagram of the first connecting sleeve assembly in the present invention;

FIG. 11 is a schematic three-dimensional structure diagram of the second connecting core assembly in the present invention;

Fig. 12 is the connection schematic diagram of the main truss beam piece and the small beam piece in the present invention;

13 is a schematic diagram of the connection between the large beam piece and the longitudinal beam in the present invention;

Fig. 14 is the connection schematic diagram of the small beam piece and the longitudinal beam in the present invention;

Fig. 15 is the connection schematic diagram of three main truss beam pieces and large beam pieces in the present invention;

Figure 16 is a schematic diagram of the assembly and connection of two main truss beam pieces and the large beam piece located at the end of the truss in the present invention;

Figure 17 is a schematic view of the installation of the prestressed cable assembly of the present invention;

Figure 18 is a schematic diagram of the truss assembly and molding in the present invention;

19 is a schematic diagram of the simple support arrangement of a truss bridge according to the present invention;

FIG. 20 is a schematic diagram of the continuous erection of a truss bridge according to the present invention.

In the accompanying drawings, the list of components represented by each number is as follows:

1. Main truss beam, 11, Upper chord, 12, Lower chord, 13, First straight web, 14, Diagonal web, 15, First fixing hole, 16, Second fixing hole, 17, Third fixing Hole, 2. Large beam piece, 21, Second straight web, 22, First beam, 23, First inclined beam, 24, First vertical beam, 25, Prestressed cable hole, 26, Fifth fixing hole , 27, the fourth fixing hole, 28, the sixth fixing hole, 3, the small beam piece, 31, the second beam, 32, the second inclined beam, 33, the second vertical beam, 34, the eighth fixing hole, 35, Seventh Fixing Hole, 4. Longitudinal Beam, 41, Eleventh Fixing Hole, 5, Prestressed Cable Assembly, 51, Anchor Plate, 52, Anchor, 53, Steel Strand, 6, Node Connection Mechanism, 61, lower gusset plate, 62, upper gusset plate, 63, side lower gusset plate, 64, side upper gusset plate, 7, first connecting core assembly, 71, ninth fixing hole, 72, first steel pipe, 73, tenth Fixing hole, 74, first fixing steel plate, 8, second connecting sleeve core assembly, 81, second fixing steel plate, 82, second steel pipe, 83, thirteenth fixing hole, 84, twelfth fixing hole, 9, Glass deck.

Detailed ways

The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples are only used to explain the present invention, but not to limit the scope of the present invention.

As shown in FIG. 18 , the embodiment of the present invention includes two sets of main truss beam pieces 1, multiple large beam pieces 2, multiple small beam pieces 3, multiple longitudinal beams 4, multiple node connection mechanisms 6 and prestressing The cable assembly 5, the two groups of main truss beam pieces 1, a plurality of large beam pieces 2, a plurality of small beam pieces 3 and a plurality of longitudinal beams 4 are all made of aluminum alloy, and the two groups of the main truss beam pieces 1 are parallel. And arranged at intervals, a plurality of the large beam pieces 2, a plurality of the small beam pieces 3 and a plurality of the longitudinal beams 4 are arranged between the two groups of the main truss beam pieces 1 components;

A plurality of the large beam pieces 2 are evenly spaced, and the two sides are respectively fixedly connected with the two groups of the main truss beam pieces 1 components through the node connecting mechanism 6, and the two groups of the two groups of the main truss beam pieces 1 components. The large beam pieces 2 are arranged between the ends;

The small cross-beam pieces 3 are arranged between the two adjacent large cross-beam pieces 2, and the two sides of the small cross-beam pieces 3 are respectively connected with the two groups of the main truss beam pieces 1 through the first connecting sleeve. The core assembly 7 is fixedly connected; the large beam piece 2 and the adjacent small beam piece 3 are fixedly connected through the longitudinal beam 4, and the two ends of the longitudinal beam 4 are respectively connected to the other through the second connection sleeve core assembly 8. Described large beam piece 2 and described small beam piece 3 are fixedly connected;

The prestressed cable assemblies 5 are provided on the faces of the two large beams 2 located at both ends of the two sets of the main truss beams 1 that are far away from each other.

In this embodiment, a glass bridge deck 9 is laid on the top of the large beam piece 2 and the small beam piece 3 , and the glass bridge deck 9 is tempered glass.

In the present invention, the main truss beam 1 component, the large beam 2, the small beam 3 and the longitudinal beam 4 are all processed in the factory, which reduces a series of problems in on-site processing, facilitates construction, and is modularized and assembled; The connecting mechanism 6 is spliced with the first connecting sleeve assembly 7 and the second connecting sleeve assembly 8, which can ensure the overall stability of the bridge and improve the stiffness of the joints; the aluminum alloy truss and the prestressed cable assembly 5 are cooperating to bear force, which on the one hand helps resist The lower chord 12 of the bridge is pulled, and more is to tighten the bridge, which improves the stiffness of the bridge, solves the problem of insufficient stiffness of the aluminum alloy bridge and the slight shaking of the bridge body, and improves the pedestrian comfort of the bridge.

Further, the main truss beam 1 assembly includes a plurality of main truss beams 1 that are connected end to end in sequence and located on the same plane, and the main truss beams 1 at both ends of the two sets of the main truss beam 1 components pass through. The node connecting mechanism 6 is fixedly connected with the large beam piece 2, and a large beam piece is provided between two adjacent main truss beam pieces 1 of the same group of the main truss beam piece 1 components. 2. One side of the large beam piece 2 is arranged between the two main truss beam pieces 1 in a group of the main truss beam piece 1 components and passes through the two main truss beam pieces 1 respectively. The node connecting mechanism 6 is fixedly connected, and the other side of the large beam piece 2 is located between the two main truss beam pieces 1 in the other group of the main truss beam piece 1 components and is respectively connected with the two main truss beam pieces 1 . The main truss beam piece 1 is fixedly connected through the node connecting mechanism 6 , and the small beam piece 3 is connected to the main truss in the two sets of the main truss beam piece 1 components through the first connection core assembly 7 The beam piece 1 is fixedly connected. The main truss beam 1 component is spliced by a plurality of main truss beams 1, and is spliced and fixed with the large beam 2 at the same time. The stability and firmness of the connection between sheet 1 and large beam sheet 2 ensure the overall strength and rigidity of the truss bridge.

As shown in Figures 1 and 2, the main truss beam 1 includes an upper chord 11, a lower chord 12, a first straight web 13 and a diagonal web 14, and the upper chord 11 and the lower chord 12 are arranged horizontally, Specifically, in the embodiment of the present invention, the upper chord 11 , the lower chord 12 , the first straight web bar 13 and the inclined web bar 14 are all aluminum alloy square tubes, and the upper chord 11 is arranged on the lower chord 12, the first straight web bar 13 is vertically arranged between the upper chord 11 and the lower chord 12, and the top end of the first straight web bar 13 is fixed to the middle of the upper chord 11 The bottom end of the first straight web rod 13 is fixedly connected with the middle of the lower chord rod 12. In this embodiment, the two ends of the first straight web rod 13 are respectively connected with the upper chord rod 11 and the lower chord rod 12. The lower chord rods 12 are welded and fixedly connected, the diagonal web rods 14 are provided on both sides of the first straight web rod 13 , and the top ends of the two diagonal web rods 14 are fixedly connected to the middle of the upper chord rod 11 . , preferably, the top ends of the two inclined web rods 14 are welded and fixed to the middle of the upper chord rod 11 and the top end of the first straight web rod 13 to improve the strength of the fixed connection and ensure the firmness of the fixed connection. The bottom ends of each of the oblique web bars 14 are respectively fixedly connected to both ends of the lower chord 12. Preferably, the bottom end of the oblique web bar 14 and the two ends of the lower chord 12 are fixedly connected by welding; the lower chord 12 There are first fixing holes 15 on the two ends of the joint connecting mechanism 6 for fixed connection with the bottom end of the side of the large beam piece 2. The hole axis of the first fixing hole 15 is connected to the lower chord. The length direction of the rod 12 is perpendicular to the length direction of the first straight web rod 13, and the two ends of the upper chord rod 11 are provided with the connection mechanism 6 and the large beam piece 2 through the node. The top end of the side is fixedly connected to the second fixing hole 16, and the hole axis of the second fixing hole 16 is perpendicular to the length direction of the upper chord 11 and at the same time is perpendicular to the length direction of the first straight web bar 13. The lower end of the first straight web rod 13 is provided with a third fixing hole 17 for fixedly connecting with the small beam piece 3 through the first connecting sleeve core assembly 7. The hole axis of the third fixing hole 17 is the same as the The length direction of the first straight web bar 13 is perpendicular to the longitudinal direction of the lower chord 12 at the same time. The upper chord 11 and the lower chord 12 are fixedly connected by the first straight web rod 13 and the inclined web rod 14 , which can ensure the strength of a single main truss beam 1 and facilitate the connection between the main truss beams 1 .

As shown in FIG. 3 , FIG. 4 , and FIG. 5 , the large beam piece 2 includes two vertically spaced second straight web bars 21 , and two horizontal and vertical web bars 21 are arranged between the two second straight web bars 21 . The first beam 22 is arranged at an upper and lower interval, the second straight web bar 21 is a square tube, and the sides facing each other of the two second straight web bars 21 are parallel to each other, so as to increase the end of the first beam 22 In order to improve the strength of the fixed connection, among the two first beams 22, the two ends of the first beam 22 located above are respectively connected with the lower parts of the sides facing each other of the two second straight web bars 21. Through welding and fixed connection, the bottom end of the first beam 22 located below and the bottom ends of the two second straight web rods 21 are fixedly connected by welding, and there is a vertical vertical connection between the two first beams 22. The first vertical beam 24 is provided, the two ends of the first vertical beam 24 are respectively connected with the middle parts of the two first horizontal beams 22 by welding and fixedly connected, and both sides of the first vertical beam 24 are provided with a first vertical beam 24. The oblique beams 23, the top ends of the two first oblique beams 23 are respectively connected with the two ends of the first beam 22 located above by welding, and the top ends of the two first oblique beams 23 are respectively connected with the two The sides of the straight web bars 21 are fixedly connected by welding, the bottom ends of the two first inclined beams 23 are fixedly connected with the middle of the first beam 22 located below by welding, and at the same time, the two The bottom end of the first inclined beam 23 is also fixedly connected with the first beam 22 located below by welding; in this embodiment, the upper surface of the first beam 22 located above is horizontally arranged to facilitate the installation of the glass bridge Surface 9, reduce the pressure on the glass bridge deck 9, if the top of the first beam 22 located above is an edge or a curved surface, the pressure on the glass bridge deck 9 will be larger, causing damage to the glass bridge deck 9. Influence; both the top and bottom ends of the two second straight web rods 21 are provided with fourth fixing holes 27 for connecting the main truss beam 1 components through the node connecting mechanism 6 . The fourth fixing holes The hole axis of 27 is perpendicular to the length direction of the second straight web bar 21, and at the same time is parallel to the length direction of the first beam 22. The bottom ends of the two second straight web bars 21 are also provided with The prestressed cable hole 25 for connecting the prestressed cable assembly 5 and the fifth fixing hole 26 for connecting the main truss beam 1 assembly through the node connecting mechanism 6, the prestressed cable hole The hole axis of 25 is perpendicular to the length direction of the second straight web bar 21, and at the same time is perpendicular to the length direction of the first beam 22. The hole axis of the fifth fixing hole 26 is perpendicular to the second straight beam 22. The longitudinal direction of the web rod 21 is vertical and parallel to the longitudinal direction of the first beam 22 . The middle part of the first beam 22 located above is provided with a fixed connection through the second connecting core assembly 8 The sixth fixing hole 28 of the longitudinal beam 4, the hole axis of the sixth fixing hole 28 is perpendicular to the length direction of the first beam 22, and at the same time is perpendicular to the length direction of the second straight web bar 21 set up. The two vertically arranged second straight web rods 21 are fixedly connected by the first cross beam 22 , the first vertical beam 24 and the first inclined cross beam 23 , and the two second straight web rods 21 are respectively connected with the two sets of main truss beam pieces. 1 component is fixedly connected to ensure the firmness and stability of the connection between the large beam piece 2 and the main truss beam piece 1 component, and at the same time, the large beam piece 2 has sufficient strength to support the bridge deck.

Preferably, as shown in FIGS. 6 and 7 , the small beam piece 3 includes two second beams 31 arranged horizontally and spaced up and down, and a second vertical beam 31 is arranged between the two second beams 31 . Beam 33, the top and bottom ends of the second vertical beam 33 are respectively connected with the middle of the two second horizontal beams 31 by welding, and the two sides of the second vertical beam 33 are provided with second inclined beams 32. , the second beam 31 , the second vertical beam 33 and the second inclined beam 32 are all square tubes, and the upper surfaces of the two second beams 31 are horizontally arranged, and the two second beams 31 are arranged horizontally. The top ends of the oblique beams 32 are respectively connected with the two ends of the second beam 31 located above by welding, and the bottom ends of the two second oblique beams 32 pass through the middle of the second beam 31 located below. Welding and fixed connection, the bottom ends of the two second inclined beams 32 are also fixedly connected by welding with the upper surface of the second beam 31 located below, and the overall strength of the small beam piece 3 can be improved by the above setting; In this embodiment, the upper surface of the second beam 31 located above and the upper surface of the first beam 22 located above are located on the same horizontal plane, so as to support the glass bridge deck 9 at the same time; two Both ends of the second beam 31 are provided with seventh fixing holes 35 for fixed connection with the main truss beam 1 component through the first connecting core assembly 7 , and the second beam 31 located above There is an eighth fixing hole 34 in the middle part for fixedly connecting with the longitudinal beam 4 through the second connecting sleeve assembly 8, the axis of the seventh fixing hole 35 and the axis of the eighth fixing hole 34 are both It is perpendicular to the length direction of the second horizontal beam 31 and is perpendicular to the length direction of the second vertical beam 33 . The arrangement of the small beam pieces 3 can further improve the stability and strength of the connection between the two sets of main truss beam pieces 1 components, and at the same time further improve the supporting force of the bridge deck.

Preferably, the two second beams 31 are square tubes. As shown in FIG. 10 , the first connecting core assembly 7 includes a first fixing steel plate 74 and two second steel plates for inserting the two second beams respectively. The first steel pipe 72 in the end of the beam 31, two of the first steel pipes 72 are arranged in parallel, and both ends are fixedly connected to one side of the first fixed steel plate 74, and the first fixed steel plate 74 is provided with a plurality of In order to fix the ninth fixing hole 71 of the main truss beam 1 component through the screw assembly, the two first steel pipes 72 are provided with a tenth fixing hole 73, and the hole axis of the tenth fixing hole 73 is in line with the The length direction of the first steel pipe 72 is vertically arranged, and the tenth fixing hole 73 is fixedly connected to the seventh fixing hole 35 through a screw assembly. Both ends of the two second beams 31 of the small beam piece 3 are respectively connected with one of the first steel pipes 72, and the same first connecting core assembly 7 is connected with the two second beams 31 to form a T-shaped node, which improves the Joint stiffness, reducing unnecessary drilling and bolt waste.

As shown in FIG. 17 , the prestressed cable assembly 5 includes an anchor plate 51 , an anchor 52 and a steel strand 53 , and one end of the steel strand 53 is fixed to the large beam piece 2 through the anchor 52 connected, the anchor plate 51 is locked and attached to the large beam piece 2 through the anchor tool 52 . One end of the steel strand 53 is fixedly connected to the large beam piece 2 through the anchor 52 to ensure the strength of the connection between the prestressed cable assembly 5 and the large beam piece 2, and to ensure that the steel strand 53 can generate a sufficiently large amount of energy for the entire truss bridge. Prestressing, thereby increasing the stiffness of the truss bridge.

As shown in FIG. 9 , the node connecting mechanism 6 includes a gusset plate, which is provided with a number of mounting holes for the screw assemblies to pass through, and the gusset plate is connected to the main truss beam through the screw assemblies. 1 component and the large beam piece 2 are fixedly connected. The main truss beam piece 1 and the large beam piece 2 are fixedly connected through the gusset plate to ensure the stability of the connection and the rigidity of the joint at the same time, avoiding the problem of strength degradation of the aluminum material at the welding point when welding is used. In the embodiment of the present invention, the gusset plate can be divided into a lower gusset plate 61 , an upper gusset plate 62 , a lower gusset plate 63 , and an upper gusset plate 64 according to the position of the connection and the size of the connection surface.

As shown in FIG. 8 , the longitudinal beam 4 is an aluminum alloy square tube, and both ends of the longitudinal beam 4 are provided with eleventh fixing holes 41 for being fixedly connected with the second connecting core assembly 8 . The axis of the eleventh fixing hole 41 is perpendicular to the longitudinal direction of the longitudinal beam 4 . The longitudinal beam 4 adopts an aluminum alloy square tube, and both ends of the longitudinal beam 4 have cavities, which are convenient for connecting with the second sleeve core assembly 8 to connect.

As shown in FIG. 11 , the second connecting core assembly 8 includes a second fixed steel plate 81 and a second steel pipe 82 for inserting into the end of the longitudinal beam 4 , and one end of the second steel pipe 82 is connected to the One side of the second fixed steel plate 81 is fixedly connected by welding, and the second fixed steel plate 81 is provided with a twelfth fixing hole 84 for fixedly connecting with the large beam piece 2 or the small beam piece 3 through a screw assembly, The second steel pipe 82 is provided with a thirteenth fixing hole 83, the hole axis of the thirteen fixing hole 83 is perpendicular to the length direction of the second steel pipe 82, and the thirteenth fixing hole 83 passes through the screw assembly It is fixedly connected with the eleventh fixing hole 41 . The second steel pipe 82 is inserted into the end of the longitudinal beam 4 and connected by screw components, and then the second fixed steel plate 81 is fixedly connected with the large beam 2 or the small beam 3, which is convenient for the installation of the longitudinal beam 4, but can ensure strength of installation.

Design assembly and erection, the main truss beam piece 1, the large beam piece 2, the small beam piece 3, the node connection mechanism 6, the first connecting sleeve core assembly 7, the second connecting sleeve core assembly 8 and the screw assembly are prepared, and the bridge is carried out. assembled. Specific steps are as follows:

(1) Install the main truss girder piece 1 and the small beam piece 3, and the two parts are connected by the first connecting sleeve core assembly 7; first, a main truss girder piece 1 is connected with the connecting sleeve core, the third fixing hole 17 and the ninth fixing hole 71 The holes are centered and tightened with three bolts; then put the second beam 31 of the small beam piece 3 on the first steel pipe 72, and the seventh fixing hole 35 and the tenth fixing hole 73 on the small beam piece 3 are just aligned, and screw Two bolts up and down can complete the installation of one side of the truss, and the other side can be installed with the first connecting sleeve component 7 on the other side and the other main truss beam to complete the repeated connection, and the main truss beam piece 1 and the small beam piece can be completed. 3 connections. The connected structure is shown in Figure 12.

(2) The large beam piece 2 and the longitudinal beam 4 are connected by the second connecting sleeve core assembly 8; first, connect the second connecting sleeve core assembly 8 on the large cross beam piece 2, pay attention to the first connecting core assembly 8 located above on a large cross beam piece 2 The beam 22 can be connected with two second steel pipes 82, and their sixth fixing hole 28 and twelfth fixing hole 84 should be aligned and centered, and the three left and right holes should be in a straight line, and then connected with left and right screws; next The longitudinal beam 4 is connected to it, and the eleventh fixing hole 41 and the thirteenth fixing hole 83 are passed through with screws, which are tightened and reinforced. The connection method of the longitudinal beam 4 on the other side is the same as above, and the connection between the large beam piece 2 and the longitudinal beam 4 can be completed, and the connected structure is shown in FIG. 13 .

(3) The small beam piece 3 and the longitudinal beam 4 are connected by the second connecting sleeve core assembly 8. First, connect the second connecting sleeve core assembly 8 on the small cross beam piece 3, and pay attention to the second cross beam located above on a small cross beam piece 3. 31 can be connected with two second steel pipes 82, the eighth fixing hole 34 and the twelfth fixing hole 84 should be aligned and centered, and the three holes on the left and right are in a straight line, and then connected with two screws on the left and right; the next is the longitudinal beam 4 is connected to it, the eleventh fixing hole 41 and the thirteenth fixing hole 83 are passed through with screws, and are tightened and reinforced. The connection method of the longitudinal beam 4 on the other side is the same as above, and the connection between the small beam piece 3 and the longitudinal beam 4 can be completed, and the connected structure is shown in FIG. 14 .

(4) The main truss beam 1 and the large beam 2 are connected by the node connecting mechanism 6; in the middle, first take two main truss beams 1 and a large beam 2, and the connecting members include two lower node plates 61, two Block upper gusset plate 62 and 31 sets of screws (including matching bolts, nuts, washers and spring sheets), the first fixing hole 15 of the main truss beam 1 and the bolt holes of the lower gusset plate 61 are aligned, the main truss beam 1 The second fixing hole 16 of the upper gusset plate 62 is aligned with the bolt hole of the upper gusset plate 62, the fifth fixing hole 26 on the large beam piece 2 is aligned with the bolt hole of the lower gusset plate 61, and the fourth fixing hole 27 on the large beam piece 2 is aligned with the upper gusset plate 61. The bolt holes of the gusset plate 62 are aligned, and two lower gusset plates 61 are used to clamp the lower part of the main truss beam piece 1 and the large beam piece 2, and two upper gusset plates 62 are used to clamp the main truss beam piece 1 and the large beam piece 2. The upper part of the truss can be spliced on one side, and the splicing method on the other side is as above; the truss assembly of the middle part can be completed (see Figure 15). At the end, first take a main truss beam piece 1 and a large beam piece 2, the connecting members include two lower gusset plates 61, two upper gusset plates 62 and 18 sets of screws (including matching bolts, nuts, washers and spring plate), the first fixing hole 15 of the main truss beam 1 is aligned with the bolt hole of the lower gusset plate 61, the second fixing hole 16 of the main truss beam 1 is aligned with the bolt hole of the upper gusset plate 62, the large beam 2 The upper fifth fixing hole 26 is aligned with the bolt hole of the lower gusset plate 61, the fourth fixing hole 27 on the large beam piece 2 is aligned with the bolt hole of the upper gusset plate 62, and the main truss girder is clamped with two lower gusset plates 61 The lower part of the sheet 1 and the large beam sheet 2, clamp the upper part of the main truss beam sheet 1 and the large beam sheet 2 with two upper gusset plates 62 to complete the splicing of one side of the truss, and the splicing method of the other side is as above; The truss assembly at both ends is completed, and the connected structure is shown in Figure 16.

(5) The prestressed cable (including the anchor plate 51, the anchor 52, and the steel strand 53) is inserted into the prestressed cable hole 25 drilled in advance in the large beam piece 2, and there is a steel strand 53 on the left and right, and The prestressed tension is performed to complete the prestressed overall stress on the bridge body. The connected structure is shown in Figure 17.

(6) The assembly of the bridge truss is completed, as shown in Figure 18, the glass deck is 90% of the bridge as a whole, and the bridge deck is made of aluminum alloy structural members. The connection method used by the truss hides the excess due to a large number of welding or gusset plate connections. Since the bridge surface is raised, the bridge deck is flat, directly squeeze the tempered glass installation glue on the upper beam and longitudinal beam 4 of the bridge, and then lay the frosted tempered glass on the bridge deck, leaving a certain distance between the bridge deck glass, and between the tempered glass. The shock-absorbing rubber strip is also squeezed; because the aluminum alloy bridge is lightweight, strong in integrity, and high in rigidity, it can be erected simply or continuously, see Figure 19 and Figure 20 .

Compared with the prior art, the advantages of the present invention are:

1. My pedestrian bridge is a prefabricated aluminum alloy bridge. The aluminum alloy beam unit and related connecting structure, glass bridge deck 9, etc. can be processed in the factory, reducing a series of problems in on-site processing, convenient construction, and modular assembly.

2. The present invention adopts aluminum alloy material, which has a series of advantages such as light weight, good durability, high specific strength, convenient construction and hoisting, anti-corrosion and rust prevention, green environmental protection and high material utilization rate; in the construction process of urban pedestrian bridges Among them, aluminum alloy pedestrian bridges have great utilization prospects.

3. The present invention adopts a variety of connection methods. The use of gusset plate connection at the main nodes can ensure the overall stability of the bridge, and the bolt connection method of the gusset plate avoids the problem of strength degradation of the aluminum material at the welding point during the welding process. At the cross beams and 4 longitudinal beams where the force is not so large, the connection sleeve core connection method imitating the curtain wall is used, and the cruciform nodes or T-row nodes can be firmly connected with only a few bolts, which improves the stiffness of the nodes and reduces unnecessary of punching and bolt waste.

4. The bridge structure in which the aluminum alloy truss and the prestressed steel strands 53 cooperate with each other is the first case. On the one hand, the appropriate tensile force of the steel strands 53 helps to resist the tension of the lower chord 12 of the bridge, and more is to tighten the bridge. Improve the stiffness of the bridge, solve the problem of insufficient stiffness of the aluminum alloy bridge and the slight shaking of the bridge body, and improve the comfort of pedestrian bridges.

5. The aluminum alloy bridge deck is regular and can be paved without any other treatment. The glass bridge deck 9 is made of frosted tempered glass, which can be customized with uniform specifications. The bridge deck paving is simple. The glass bridge deck 9 is relatively light and the overall Sexual beauty is good.

The bridge adopts toughened glass deck 9, and the structure is the guardrail. After the bridge is completed, the appearance is simple and beautiful, the structural stability is high, the construction period is short, the total cost of a single bridge is low, and the maintenance cost is low, which is conducive to promotion.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. The assembled aluminum alloy prestressed truss bridge is characterized by comprising two groups of main truss beam piece (1) assemblies, a plurality of large beam pieces (2), a plurality of small beam pieces (3), a plurality of longitudinal beams (4), a plurality of node connecting mechanisms (6) and a prestressed inhaul cable assembly (5), wherein the two groups of main truss beam piece (1) assemblies, the plurality of large beam pieces (2), the plurality of small beam pieces (3) and the plurality of longitudinal beams (4) are made of aluminum alloy materials, the two groups of main truss beam piece (1) assemblies are arranged in parallel at intervals, and the plurality of large beam pieces (2), the plurality of small beam pieces (3) and the plurality of longitudinal beams (4) are arranged between the two groups of main truss beam piece (1) assemblies;

the large cross beam pieces (2) are uniformly arranged at intervals, two side edges of the large cross beam pieces are fixedly connected with the two groups of main truss beam piece (1) assemblies through the node connecting mechanisms (6), and the large cross beam pieces (2) are arranged between two ends of the two groups of main truss beam piece (1) assemblies;

the small cross beam pieces (3) are arranged between every two adjacent large cross beam pieces (2), and two side edges of each small cross beam piece (3) are fixedly connected with two groups of main truss beam piece (1) assemblies through first connecting sleeve core assemblies (7); the large cross beam piece (2) is fixedly connected with the adjacent small cross beam piece (3) through the longitudinal beam (4), and two ends of the longitudinal beam (4) are fixedly connected with the large cross beam piece (2) and the small cross beam piece (3) through second connecting sleeve assemblies (8) respectively;

two of the two ends of the main truss beam piece (1) assemblies are far away from the large cross beam piece (2), and the prestressed inhaul cable assembly (5) is arranged on one surface of the two ends of the main truss beam piece (1) assemblies.

2. The fabricated aluminum alloy prestressed truss bridge as claimed in claim 1, wherein the main truss girder segment (1) assembly comprises a plurality of main truss girder segments (1) connected end to end in sequence and located on the same plane, the large girder segments (2) are fixedly connected between the main truss girder segments (1) at two ends of two groups of main truss girder segment (1) assemblies through the node connecting mechanism (6), one large girder segment (2) is arranged between two adjacent main truss girder segments (1) of one group of main truss girder segment (1) assembly, one side of the large girder segment (2) is arranged between two main truss girder segments (1) of one group of main truss girder segment (1) assembly and is fixedly connected with two main truss girder segments (1) through the node connecting mechanism (6), the other side edge of the large cross beam piece (2) is located on the other group of two main truss beam pieces (1) in the main truss beam piece assembly, the main truss beam pieces (1) are arranged between the main truss beam pieces (1) and are respectively fixedly connected with the two main truss beam pieces (1) through the node connecting mechanism (6), and the small cross beam piece (3) is fixedly connected with the main truss beam pieces (1) in the main truss beam piece assembly through the first connecting sleeve core assembly (7).

3. The assembled aluminum alloy prestressed truss bridge of claim 2, wherein the main truss girder segment (1) comprises an upper chord member (11), a lower chord member (12), a first straight web member (13) and diagonal web members (14), the upper chord member (11) and the lower chord member (12) are horizontally arranged, the upper chord member (11) is arranged vertically above the lower chord member (12), the first straight web member (13) is vertically arranged between the upper chord member (11) and the lower chord member (12), the top end of the first straight web member (13) is fixedly connected with the middle part of the upper chord member (11), the bottom end of the first straight web member (13) is fixedly connected with the middle part of the lower chord member (12), the diagonal web members (14) are arranged on two sides of the first straight web member (13), and the top ends of the two diagonal web members (14) are fixedly connected with the middle part of the upper chord member (11), the bottom ends of the two inclined web members (14) are respectively fixedly connected with the two ends of the lower chord member (12); be equipped with on the both ends of lower chord (12) and be used for through node coupling mechanism (6) with the bottom fixed connection's of the side of big beam piece (2) first fixed orifices (15), the both ends of going up chord (11) are equipped with and are used for passing through node coupling mechanism (6) with the top fixed connection second fixed orifices (16) of the side of big beam piece (2), the lower extreme of first straight-time web member (13) is equipped with and is used for passing through first connecting sleeve core subassembly (7) with little beam piece (3) fixed connection's third fixed orifices (17).

4. An assembled aluminum alloy pre-stressed truss bridge as defined in any one of claims 1 to 3, it is characterized in that the large beam piece (2) comprises two second straight web members (21) which are vertically arranged at intervals, two horizontal first beams (22) which are vertically arranged at intervals are arranged between the two second straight web members (21), a first vertical beam (24) which is vertically arranged is arranged between the two first beams (22), two ends of the first vertical beam (24) are respectively fixedly connected with the middle parts of the two first cross beams (22), first oblique cross beams (23) are arranged on two sides of the first vertical beam (24), the top ends of the two first oblique cross beams (23) are fixedly connected with two ends of the first cross beam (22) located above respectively, and the bottom ends of the two first oblique cross beams (23) are fixedly connected with the middle part of the first cross beam (22) located below respectively; two the top and bottom both ends of the straight web member of second (21) all are equipped with and are used for passing through node coupling mechanism (6) are connected fourth fixed orifices (27), two of main truss girder piece (1) subassembly the bottom of the straight web member of second (21) still is equipped with and is used for connecting prestressing force cable penetrating hole (25) of prestressing force cable subassembly (5) and be used for passing through node coupling mechanism (6) are connected fifth fixed orifices (26) of main truss girder piece (1) subassembly are located the top the middle part of first crossbeam (22) is equipped with and is used for passing through second coupling sleeve subassembly (8) fixed connection sixth fixed orifices (28) of longeron (4).

5. The fabricated aluminum alloy prestressed truss bridge as claimed in any one of claims 1 to 3, wherein the small beam piece (3) comprises two horizontal second beams (31) arranged at an interval from top to bottom, a vertically arranged second vertical beam (33) is arranged between the two second beams (31), both ends of the top and bottom of the second vertical beam (33) are respectively fixedly connected with the middle parts of the two second beams (31), both sides of the second vertical beam (33) are respectively provided with a second oblique beam (32), the top ends of the two second oblique beams (32) are respectively fixedly connected with both ends of the second beam (31) located above, and the bottom ends of the two second oblique beams (32) are respectively fixedly connected with the middle part of the second beam (31) located below; two the both ends of second crossbeam (31) all are equipped with and are used for passing through first connecting sleeve core subassembly (7) with main truss roof beam piece (1) subassembly fixed connection's seventh fixed orifices (35), are located the top the middle part of second crossbeam (31) is equipped with and is used for passing through second connecting sleeve core subassembly (8) with longeron (4) fixed connection's eighth fixed orifices (34).

6. The assembled aluminum alloy prestressed truss bridge of claim 5, wherein the two second beams (31) are square pipes, the first connecting bushing assembly (7) comprises a first fixed steel plate (74) and two first steel pipes (72) respectively inserted into the ends of the two second beams (31), the two first steel pipes (72) are arranged in parallel, and one end of each first steel pipe is fixedly connected with one surface of the first fixed steel plate (74), the first fixed steel plate (74) is provided with a plurality of ninth fixing holes (71) for fixedly connecting the main truss girder piece (1) assembly through screw assemblies, the two first steel pipes (72) are provided with tenth fixing holes (73), and the tenth fixing holes (73) are fixedly connected with the seventh fixing holes (35) through screw assemblies.

7. The assembled aluminum alloy prestressed truss bridge of any one of claims 1-3, wherein the prestressed guy cable assembly (5) comprises an anchor plate (51), an anchor (52) and a steel strand (53), one end of the steel strand (53) is fixedly connected with the large cross beam piece (2) through the anchor (52), and the anchor plate (51) is locked and attached to the large cross beam piece (2) through the anchor (52).

8. The fabricated aluminum alloy prestressed truss bridge as defined in any one of claims 1-3, wherein said node connecting mechanism (6) comprises a node plate, said node plate is provided with a plurality of mounting holes for said screw assembly to pass through, said node plate is fixedly connected with said main truss beam piece (1) assembly and said large beam piece (2) through the screw assembly.

9. An assembled aluminum alloy prestressed truss bridge as defined in any one of claims 1-3, wherein said longitudinal beams (4) are aluminum alloy square pipes, and both ends of said longitudinal beams (4) are provided with eleventh fixing holes (41) for fixedly connecting with said second connecting sleeve assembly (8).

10. The fabricated aluminum alloy prestressed truss bridge as claimed in claim 9, wherein the second connecting sleeve assembly (8) comprises a second fixing steel plate (81) and a second steel pipe (82) inserted into the end of the longitudinal beam (4), one end of the second steel pipe (82) is fixedly connected with one surface of the second fixing steel plate (81), a twelfth fixing hole (84) for fixedly connecting with the large beam piece (2) or the small beam piece (3) through a screw assembly is arranged on the second fixing steel plate (81), a thirteenth fixing hole (83) is arranged on the second steel pipe (82), and the thirteenth fixing hole (83) is fixedly connected with the eleventh fixing hole (41) through a screw assembly.

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