CN215405532U - Large-span steel truss bridge reinforcing structure - Google Patents
Large-span steel truss bridge reinforcing structure Download PDFInfo
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- CN215405532U CN215405532U CN202122120242.2U CN202122120242U CN215405532U CN 215405532 U CN215405532 U CN 215405532U CN 202122120242 U CN202122120242 U CN 202122120242U CN 215405532 U CN215405532 U CN 215405532U
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Abstract
The utility model discloses a large-span steel truss bridge reinforcing structure, wherein lower chords are integrally in a trapezoidal structure and comprise top chords which are horizontally arranged and inclined waist chords which are positioned at two ends of the top chords, longitudinal beams are arranged between the two lower chords in parallel, the longitudinal beams are connected with the lower chords at two sides through cross beams, free ends of the waist chords extend out of bearing parts along the horizontal direction, the top chords at the middle position of a bridge body are used as main supports, the pressure of the top chords is transmitted to piers of a supporting bridge body through the waist chords at the two ends, one part of the pressure borne by the waist chords is transmitted to the piers of the supporting bridge body, the other part of the pressure forms extrusion force to the top chords, and after the lower chords are connected with the longitudinal beams and the upper chords, the integral supporting strength of the lower chords can be ensured, and the supporting strength of the middle parts of the lower chords can be enhanced.
Description
Technical Field
The utility model belongs to the field of steel truss bridge structures, and particularly relates to a large-span steel truss bridge reinforcing structure.
Background
The steel truss bridge is a structural system between beams and arches, and is a structure formed by integrally combining a bent upper beam structure and a pressure-bearing lower column. The steel truss bridge is provided with two lower chords which are arranged side by side and horizontally and an upper chord which is positioned above the lower chords, the two lower chords are connected through a cross beam, the two upper chords are connected with an upper flat beam in a cargo group, the upper chords are connected with the lower chords through web members, then panels are erected on the lower chords and the cross beam, concrete is laid on the panels to form a road surface, the lower chords of the current steel truss bridge structure adopt horizontal box girders, the positions with larger stress are arranged in the middle and two ends of the lower chords, the two ends of the lower chords are supported by piers, the middle position is supported by the strength of the middle part and the connection strength of other structures, the support strength of the middle position is weaker, and the middle part of the bridge is easy to have weak floating up and down, the central support structure of its bridge therefore has room for further reinforcement.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: the reinforcing structure of the large-span steel truss bridge can solve the problems.
The technical scheme adopted by the utility model is as follows:
the utility model provides a structure is reinforceed to large-span steel truss bridge, includes two lower chords that set up side by side and the upper chord that is located two lower chord tops respectively, is connected through the web member between the lower chord that corresponds the position and the upper chord, connects with the help of last flat beam between two upper chords, a serial communication port, the whole trapezium structure that is of lower chord, and it includes the top chord that the level set up to and be located the waist chord of the slope at top chord both ends, set up parallel arrangement between two lower chords rather than shape assorted longeron, all be connected with the help of the crossbeam between the lower chord of longeron and both sides, the free end of waist chord extends along the horizontal direction and bears the portion.
The further technical scheme is that the lower chord adopts a pipe flange combination beam.
The technical scheme is that the tube flange composite beam comprises a tube flange beam body, wherein the tube flange beam body is provided with a lower flange, an upper flange in a square tubular structure and a web welded between the lower flange and the upper flange, the upper flange comprises a square tube, channel steel and a butt-joint sealing plate, the lower part of the square tube is provided with an opening, the upper end of the web is in contact with the top wall in the square tube through the opening and the upper part of the web is welded and fixed with the square tube, the two channel steel are positioned in the square tube and symmetrically arranged on two sides of the web respectively, the channel steel comprises a transverse plate and a first vertical plate and a second vertical plate which are positioned at two ends of the transverse plate and extend vertically upwards, the transverse plate is in contact with the bottom wall in the square tube, the first vertical plate is in contact with the inner side wall of the square tube, the second vertical plate is in contact with the side wall of the web, the channel steel is welded and connected with the square tube, the channel steel is welded and connected with the web, the butt-joint sealing plate comprises two butt-joint sealing plates, two the butt joint shrouding is located the both ends of pipe flange reason roof beam body respectively, and the butt joint shrouding is platelike structure, and butt joint shrouding welded fastening just can the tip of shutoff side's pipe at this end of body of pipe flange reason roof beam, and the slip casting hole has all been seted up to the top both sides of square pipe.
The technical scheme is that the lower chord comprises a plurality of sections of pipe flange composite beams which are sequentially connected to form the lower chord, the butt joint sealing plates are of quadrilateral structures, the length of each butt joint sealing plate is matched with the width of the pipe flange composite beam body, the height of each butt joint sealing plate is matched with the height of the pipe flange composite beam body, a plurality of connecting holes are formed in the butt joint sealing plates, the butt joint sealing plates on two adjacent pipe flange composite beams are in contact, and the two butt joint sealing plates in contact with each other are connected through bolts.
The further technical scheme is that the top chord member is a section of tube flange composite beam.
The technical scheme is that a plurality of steel bars are arranged inside the square tube, and the length direction of the steel bars is consistent with that of the square tube.
A further technical scheme lies in, all welded fastening has the side muscle in web both sides, and the side muscle sets up along web length direction equidistant, and the upper end and the side pipe welded fastening of side muscle, the lower extreme and the bottom flange welded fastening of side muscle.
The technical scheme is that the cross beam is a section of tube flange composite beam, the longitudinal beam is formed by sequentially connecting a plurality of sections of tube flange composite beams, the butt-joint sealing plate at one end of the cross beam is connected with the web plate of the tube flange composite beam forming the lower chord through a bolt, and the butt-joint sealing plate at the other end of the cross beam is connected with the web plate of the tube flange composite beam forming the longitudinal beam through a bolt.
The technical scheme is that the cross beams on the two sides of the longitudinal beam are arranged in a staggered mode.
The technical scheme is that the web members comprise vertical rods and diagonal rods, the diagonal rods are located between the two vertical rods, the upper ends of the diagonal rods are connected with the upper chord members, the lower ends of the diagonal rods are connected with the lower chord members, the upper ends of the vertical rods are connected with the upper chord members, and the lower ends of the vertical rods are connected with the lower chord members.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
1. the lower chord is of a trapezoidal structure integrally and comprises a top chord arranged horizontally and inclined waist chords arranged at two ends of the top chord, longitudinal beams are arranged between the two lower chords in parallel, the longitudinal beams are connected with the lower chords at two sides by means of cross beams, free ends of the waist chords extend out of bearing parts along the horizontal direction, the top chord at the middle part of the bridge body is used as a main support, the pressure on the top chord is transmitted to a bridge pier supporting the bridge body through the waist chords at the two ends, one part of the pressure borne by the waist chords is transmitted to the bridge pier supporting the bridge body, the other part of the pressure forms extrusion force on the top chord, after the lower chords are connected with the longitudinal beams and the upper chords, the integral supporting strength of the lower chords can be ensured, the supporting strength at the middle parts of the lower chords can be enhanced, the supporting strength of the middle parts of the lower chords is further enhanced compared with the existing horizontal lower chords, and the middle strength of the bridge body is further enhanced, can further avoid the weak up and down floating of the middle part of the bridge body, the longitudinal beam can enhance the supporting strength of the middle part of the bridge body in the width direction,
2. the lower chord adopts a tube flange composite beam which comprises a tube flange beam body, the upper flange of the tube flange beam body comprises a square tube, a channel steel and a butt-joint sealing plate, the lower part of the square tube is provided with an opening, the upper end of a web plate passes through the opening and contacts with the top wall in the square tube, the upper end of the web plate is welded and fixed with the square tube, the welding positions of the square tube and the web plate can form two welding positions between the two sides of the upper end of the web plate and the inner wall of the square tube, two channel steels are positioned in the square tube and are respectively and symmetrically arranged at the two sides of the web plate, the channel steels are welded with the square tube to form a whole, the channel steels are welded with the web plate, the welding position is arranged at the lower side position where the channel steel is contacted with the web plate, the square tube and the web plate can be indirectly connected, the welding positions at four positions can be arranged between the square tube and the web plate through the two channel steels on the whole, and the web upper end is located square intraduct, also can further improve the joint strength with the web after square intraduct slip casting is filled.
3. The channel-section steel includes the diaphragm and is located the diaphragm both ends along vertical riser and the second riser that upwards extends, and the diaphragm contacts with the diapire in the square tube, and the first riser contacts with square intraductal inside wall, and the second riser contacts with the web lateral wall, plays the supporting role through first riser and second riser between square intraductal inside wall and web, guarantees the structural strength who manages side self.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic view of the construction of the lower chord of the present invention;
FIG. 5 is a schematic view of the connection structure of the cross beam, the lower chord and the longitudinal beam;
FIG. 6 is a schematic structural view of the pipe flange composite beam according to the present invention;
FIG. 7 is a schematic view of the connection structure of the web and the upper flange according to the present invention;
fig. 8 is an enlarged schematic view of the structure at a in fig. 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1 to 8, a large-span steel truss bridge reinforcing structure includes two lower chords 20 arranged side by side and upper chords 21 respectively located above the two lower chords 20, the lower chords at corresponding positions are connected with the upper chords 21 through web members 22, the two upper chords 21 are connected with each other through upper flat beams 31, and is characterized in that the lower chords 20 are integrally in a trapezoidal structure and include top chords 23 arranged horizontally and inclined waist chords 24 located at two ends of the top chords 23, longitudinal beams 25 matched with the two lower chords 20 in shape are arranged in parallel between the two lower chords 20, the longitudinal beams 25 are connected with the lower chords 20 at two sides through cross beams 30, and free ends of the waist chords 24 extend out of bearing parts 29 in the horizontal direction.
When the bridge is used, after the integral structure of the bridge is completed, after a panel is welded or fixed by bolts on the bridge floor formed by the lower chord members 20, the longitudinal beams 25 and the cross beams 30, concrete filling molds are erected on the periphery of the panel, and then the final smooth bridge floor is formed.
The lower chord 20 is in a trapezoidal structure as a whole, and comprises a top chord 23 arranged horizontally and inclined waist chords 24 arranged at two ends of the top chord 23, a longitudinal beam 25 is arranged between the two lower chords 20 in parallel, the longitudinal beam 25 is connected with the lower chords 20 at two sides by a cross beam 30, the free end of the waist chord 24 extends out of a bearing part 29 along the horizontal direction, the top chord 23 at the middle position of the bridge body is used as a main support, the pressure of the top chord 23 is transmitted to the bridge pier of the supporting bridge body through the waist chords 24 at the two ends, one part of the pressure borne by the waist chord 24 is transmitted to the bridge pier of the supporting bridge body, the other part forms extrusion force to the top chord 23, after the lower chord 20 is connected with the longitudinal beam 25 and the upper chord 21, the integral supporting strength of the lower chord 20 can be ensured, the supporting strength at the middle part of the lower chord 20 can be enhanced, and the supporting strength at the middle part of the lower chord 20 is further enhanced compared with the existing horizontal lower chord 20, further, the strength of the middle part of the bridge body is further enhanced, the middle part of the bridge body can be further prevented from slightly floating up and down, and the longitudinal beam 25 can enhance the supporting strength of the middle part of the bridge body in the width direction.
The lower chord 20 is a tube flange composite beam 26, and the tube flange composite beam 26 may be an existing tube flange composite beam 26 or a tube flange composite beam 26 described below.
The pipe flange composite beam 26 comprises a pipe flange beam body 1, the pipe flange beam body 1 is provided with a lower flange 2, an upper flange 3 in a square pipe 5-shaped structure, and a web 4 welded between the lower flange 2 and the upper flange 3, the upper flange 3 comprises a square pipe 5, channel steel 6 and a butt-joint sealing plate 7, an opening 8 is arranged at the lower part of the square pipe 5, the upper end of the web 4 passes through the opening 8 and is contacted with the top wall in the square pipe 5, the upper end of the web 4 is welded and fixed with the square pipe 5, the channel steel 6 comprises two channel steels 6, the two channel steels 6 are both positioned in the square pipe 5 and are symmetrically arranged at two sides of the web 4 respectively, the channel steel 6 comprises a transverse plate 9 and a first vertical plate 10 and a second vertical plate 11 which are positioned at two ends of the transverse plate 9 and extend upwards vertically, the transverse plate 9 is contacted with the bottom wall in the square pipe 5, the first vertical plate 10 is contacted with the inner side wall of the square pipe 5, the second vertical plate 11 is contacted with the side wall of the web 4, channel-section steel 6 and square 5 welded connection of pipe, 6 and 4 welded connection of web of channel-section steel, butt joint shrouding 7 includes two, two butt joint shrouding 7 is located the both ends of pipe flange reason roof beam body 1 respectively, and butt joint shrouding 7 is platelike structure, and butt joint shrouding 7 welded fastening just can the shutoff square 5's of pipe tip at pipe flange reason roof beam body 1 tip, and grouting hole 12 has all been seted up to square 5's top both sides.
When the flange beam body 1 is used, the lower flange 2 is welded with the web 4 when the flange beam body 1 is formed, then the square tube 5 with the opening 8 is buckled on the web 4, the upper end of the web 4 is contacted with the top wall in the square tube 5, the upper end of the web 4 is welded and fixed with the square tube 5, the welding position can form two welding positions between the two sides of the upper end of the web 4 and the inner wall of the square tube 5, two channel steel 6 are arranged in the square tube 5 in a penetrating way after winding, the transverse plate 9 of the channel steel 6 is contacted with the bottom wall in the square tube 5, the first vertical plate 10 and the second vertical plate 11 which are positioned at the two ends of the transverse plate 9 and extend upwards vertically are respectively contacted with the side wall of the square tube 5 and the side wall of the web 4, the transverse plate 9 is welded with the edge position of the opening 8 of the square tube 5, the transverse plate 9 is welded with the web 4, after the square tube 5 and the channel steel 6 are regarded as an integral tube, the welding positions between the integral tube and the web 4 can be generated, compare the connected mode that current welding position only has two positions, can further improve pipe flange combination beam 26's bulk strength to satisfy the demand of large-span roof beam, it will dock shrouding 7 again at last and weld to pipe flange roof beam body 1 on later, alright in order to carry out the slip casting, the slip casting can follow two slip casting holes 12 and carry out the slip casting to square 5 inside pipes.
A plurality of transverse ribs 14 are arranged in the channel steel 6 at equal intervals along the length direction of the channel steel, one end of each transverse rib 14 is fixed to the first vertical plate 10, the other end of each transverse rib is fixed to the second vertical plate 11, and the transverse ribs 14 can support the first vertical plate 10 and the second vertical plate 11.
The lower chord 20 comprises a plurality of sections of tube flange composite beams 26 which are sequentially connected to form the lower chord 20, the butt joint sealing plates 7 are of quadrilateral structures, the length of each butt joint sealing plate is matched with the width of the tube flange beam body 1, the height of each butt joint sealing plate is matched with the height of the tube flange beam body 1, a plurality of connecting holes 13 are formed in the butt joint sealing plates 7, the butt joint sealing plates 7 on the two adjacent tube flange composite beams 26 are in contact, and the two butt joint sealing plates 7 in mutual contact are connected through bolts, so that the lower chord 20 is formed by assembling the plurality of sections of tube flange composite beams 26.
The top chord 23 is a section of the tube flange composite beam 26, and if a plurality of sections of the tube flange composite beams 26 are adopted, the top chord 23 itself is not a whole, because the top chord 23 is used as a direct supporting point of the middle part, the requirement on the connection strength of the mutual connection positions is higher.
Be fixed with branch 16 on the inside both sides wall of square pipe 5, 16 equidistant settings of branch along square pipe 5 length direction, the length direction of branch 16 sets up along square pipe 5 width direction, the free end downward sloping of branch 16 is provided with a plurality of bumping posts 17 on the branch 16, and reinforcing bar 15 is located the contained angle position that bumping post 17 and branch 16 formed, and its each reinforcing bar 15 corresponds a bumping post 17 respectively, can be inside square pipe 5 with reinforcing bar 15 evenly distributed through branch 16.
All welded fastening has side muscle 18 in 4 both sides of web, and side muscle 18 sets up along 4 length direction equidistant of web, and the upper end and the square pipe 5 welded fastening of side muscle 18, the lower extreme and the bottom flange 2 welded fastening of side muscle 18 can further play the supporting role between top flange 3 and bottom flange 2.
Set up preformed hole 19 in square 5 bottoms of pipe and side, preformed hole 19 inward flange welds with 6 contact intersection positions of channel-section steel, can further guarantee the joint strength between channel-section steel 6 and the square 5 of pipe.
The cross beam 30 is a section of tube flange composite beam 26, the height of the tube flange composite beam 26 serving as the cross beam 30 is matched with the height of a web of the tube flange composite beam 26 forming the lower chord 20, the longitudinal beam 25 is formed by sequentially connecting a plurality of sections of tube flange composite beams 26, the butt seal plate 7 at one end of the cross beam 30 is connected with the web 4 of the tube flange composite beam 26 forming the lower chord 20 through bolts, the butt seal plate 7 at the other end of the cross beam 30 is connected with the web 4 of the tube flange composite beam 26 forming the longitudinal beam 25 through bolts, through holes corresponding to the connecting holes 13 in the butt seal plate 7 are formed in the web 4 of the tube flange composite beam 26, then the through bolts are connected and fastened through nuts, and compared with the existing welding mode of the cross beam 30 and the lower chord 20, the bolt connection is adopted, and more connection points are higher in connection strength.
The cross beams 30 on the two sides of the longitudinal beam 25 are arranged in a staggered mode, so that the longitudinal beam 25 can be connected with the lower chord members 20 on the two sides more stably, the cross beams 30 on the two sides of the longitudinal beam 25 can be arranged correspondingly, and the use of bolts can be reduced.
The web members 22 comprise vertical rods 27 and diagonal rods 28, the diagonal rods 28 are located between the two vertical rods 27, the upper ends of the diagonal rods 28 are connected with the upper chord 21, the lower ends of the diagonal rods are connected with the lower chord 20, the upper ends of the vertical rods 27 are connected with the upper chord 21, and the lower ends of the vertical rods 27 are connected with the lower chord 20, so that the connection strength between the upper chord 21 and the lower chord 20 is ensured.
The above are merely preferred embodiments of the present invention.
Claims (10)
1. The utility model provides a large-span steel truss bridge reinforcing structure, includes two lower chord (20) that set up side by side and upper chord (21) that are located two lower chord (20) tops respectively, is connected through web member (22) between the lower chord of corresponding position and upper chord (21), connects with the help of last flat beam (31) between two upper chord (21), its characterized in that, lower chord (20) wholly is trapezium structure, and top chord (23) that it set up including the level to and waist chord (24) that are located the slope at top chord (23) both ends, set up parallel arrangement between two lower chord (20) and rather than shape assorted longeron (25), all connect with the help of crossbeam (30) between longeron (25) and the lower chord (20) of both sides, the free end of waist chord (24) extends out bearing part (29) along the horizontal direction.
2. The long-span steel truss bridge reinforcing structure of claim 1, wherein the lower chord (20) is a tube flange composite beam (26).
3. The large-span steel truss bridge reinforcing structure according to claim 2, wherein the tube flange combination beam (26) comprises a tube flange beam body (1), the tube flange beam body (1) is provided with a lower flange (2), an upper flange (3) in a square tube (5) shaped structure, and a web (4) welded between the lower flange (2) and the upper flange (3), the upper flange (3) comprises a square tube (5), channel steel (6) and a butt-joint sealing plate (7), an opening (8) is formed in the lower portion of the square tube (5), the upper end of the web (4) passes through the opening (8) and contacts with the top wall in the square tube (5), the upper end of the web (4) is welded and fixed with the square tube (5), the channel steel (6) comprises two channel steels, the two channel steels (6) are both located in the square tube (5) and are symmetrically arranged on both sides of the web (4) respectively, channel-section steel (6) include diaphragm (9) and be located diaphragm (9) both ends along vertical riser (10) and the second riser (11) that upwards extends, and diaphragm (9) and the diapire in the side pipe (5) contact, and first riser (10) and side pipe (5) inside wall contact, and second riser (11) and web (4) lateral wall contact, channel-section steel (6) and side pipe (5) welded connection, channel-section steel (6) and web (4) welded connection, butt joint shrouding (7) include two, two butt joint shrouding (7) are located the both ends of pipe flange roof beam body (1) respectively, and butt joint shrouding (7) are platelike structure, and butt joint shrouding (7) welded fastening is at pipe flange roof beam body (1) tip and can shutoff side pipe's the tip of pipe (5), and grouting hole (12) have all been seted up to the top both sides of side pipe (5).
4. The large-span steel truss bridge reinforcing structure according to claim 3, wherein the lower chord (20) comprises a plurality of sections of tube flange composite beams (26) which are sequentially connected to form the structure, the abutting sealing plates (7) are in a quadrilateral structure, the length of each abutting sealing plate is matched with the width of the tube flange beam body (1), the height of each abutting sealing plate is matched with the height of the tube flange beam body (1), a plurality of connecting holes (13) are formed in the abutting sealing plates (7), the abutting sealing plates (7) on two adjacent tube flange composite beams (26) are in contact, and the two abutting sealing plates (7) in contact with each other are connected through bolts.
5. The large-span steel truss bridge reinforcing structure of claim 4, wherein the top chord member (23) is a section of a pipe flange composite beam (26).
6. The large-span steel truss bridge reinforcing structure of claim 5, wherein a plurality of reinforcing steel bars (15) are arranged inside the square pipes (5), and the length direction of the reinforcing steel bars (15) is consistent with the length direction of the square pipes (5).
7. The large-span steel truss bridge reinforcing structure of claim 6, wherein the web (4) is welded and fixed with side ribs (18) on both sides, the side ribs (18) are arranged at equal intervals along the length direction of the web (4), the upper ends of the side ribs (18) are welded and fixed with the square pipes (5), and the lower ends of the side ribs (18) are welded and fixed with the lower flange (2).
8. The large-span steel truss bridge reinforcing structure according to claim 7, wherein the cross beam (30) is a section of the tube flange composite beam (26), the longitudinal beam (25) is formed by connecting a plurality of sections of the tube flange composite beam (26) in sequence, the butt-joint sealing plate (7) at one end of the cross beam (30) is connected with the web (4) of the tube flange composite beam (26) forming the lower chord (20) through bolts, and the butt-joint sealing plate (7) at the other end of the cross beam (30) is connected with the web (4) of the tube flange composite beam (26) forming the longitudinal beam (25) through bolts.
9. The large-span steel truss bridge reinforcing structure of claim 8, wherein the cross beams (30) at both sides of the longitudinal beams (25) are arranged in a staggered manner.
10. The large-span steel truss bridge reinforcing structure according to claim 1, wherein the web members (22) comprise vertical rods (27) and diagonal rods (28), the diagonal rods (28) are located between the two vertical rods (27), the upper ends of the diagonal rods (28) are connected with the upper chords (21), the lower ends of the diagonal rods are connected with the lower chords (20), the upper ends of the vertical rods (27) are connected with the upper chords (21), and the lower ends of the vertical rods are connected with the lower chords (20).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122120242.2U CN215405532U (en) | 2021-09-03 | 2021-09-03 | Large-span steel truss bridge reinforcing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122120242.2U CN215405532U (en) | 2021-09-03 | 2021-09-03 | Large-span steel truss bridge reinforcing structure |
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| CN215405532U true CN215405532U (en) | 2022-01-04 |
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| CN202122120242.2U Active CN215405532U (en) | 2021-09-03 | 2021-09-03 | Large-span steel truss bridge reinforcing structure |
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