Large-span integral steel bridge and construction method

Abstract

The invention relates to a large-span integral steel bridge and a construction method, and belongs to the technical field of chemical steel bridge construction. Comprising a pier bearing platform and a prefabricated pile foundation connected with the pier bearing platform, an inter-pier connecting cross beam is connected between a first pier and a second pier, and the upper end of the first pier and the upper end of the second pier are provided with a first pier positioning inclined face and a second pier positioning inclined face correspondingly; a bridge body positioning inclined face A matched with the first pier positioning inclined face is arranged on one side of the overline steel bridge, and a steel supporting frame is arranged between the overline steel bridge and the inter-pier connecting cross beam. The hoisting device has the following beneficial effects that the assembly of the overline steel bridge and the steel supporting frame is hoisted, the overline steel bridge is positioned through cooperation of the first bridge pier positioning inclined face and the bridge body positioning inclined face A and cooperation of the second bridge pier positioning inclined face and the bridge body positioning inclined face B, and after the overline steel bridge is hoisted in place, the steel supporting frame is hoisted; the steel supporting frames and the connecting cross beams between the bridge piers are used for fixing, and reinforcement of the overline steel bridge is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to a large-span integral steel bridge and a construction method, and belongs to the technical field of chemical steel bridge construction. BACKGROUND

[0002] Steel bridge erection is a construction method applied to bridge construction, mainly referring to the process of assembling and erecting the manufactured steel bridge bars or beam segments into a bridge.

[0003] With the vigorous development of prefabricated assembly technology, large-span integral steel bridges are more and more applied to elevated construction in central urban areas, especially in large-span road crossing bridges. However, the current technology is not comprehensive, and has the following disadvantages: in the traditional hoisting process of the steel bridge, the installation deviation caused by the insufficient matching degree of the bridge pier and the bridge body positioning surface needs to be repeatedly adjusted, and the connection stability of the steel support frame and the bridge pier is insufficient, affecting the safety of the overall structure.

[0004] To solve one of the above problems, a large-span integral steel bridge and a construction method are urgently needed. SUMMARY

[0005] According to the above deficiencies in the prior art, the technical problem to be solved by the present application is: how to use the first bridge pier positioning slope and the bridge body positioning slope A, the second bridge pier positioning slope and the bridge body positioning slope B to cooperate with the positioning of the steel bridge across the line, and after the steel bridge across the line is hoisted into place, the steel support frame and the connecting beam between the bridge piers are fixed to realize the reinforcement of the steel bridge across the line. Therefore, a large-span integral steel bridge and a construction method are provided.

[0006] The large-span integral steel bridge of the present application comprises a bridge pier cap and a prefabricated pile foundation connected with the bridge pier cap, characterized in that: it further comprises a steel bridge across the line, the upper surface of the steel bridge across the line is a bridge deck, the upper surface of the bridge pier cap is provided with a first bridge pier and a second bridge pier at intervals, a connecting beam between bridge piers is connected between the first bridge pier and the second bridge pier, a first bridge pier positioning slope and a second bridge pier positioning slope are respectively arranged at the upper end of the first bridge pier and the second bridge pier, a bridge body positioning slope A cooperating with the first bridge pier positioning slope is arranged on one side of the steel bridge across the line, a bridge body positioning slope B cooperating with the second bridge pier positioning slope is arranged on the other side of the steel bridge across the line, and a steel support frame is arranged between the steel bridge across the line and the connecting beam between the bridge piers.

[0007] The combined parts of the steel bridge across the line and the steel support frame are hoisted, the first bridge pier positioning slope and the bridge body positioning slope A, the second bridge pier positioning slope and the bridge body positioning slope B are used to cooperate with the positioning of the steel bridge across the line, and after the steel bridge across the line is hoisted into place, the steel support frame and the connecting beam between the bridge piers are fixed to realize the reinforcement of the steel bridge across the line.

[0008] The steel bridge is manufactured in a factory, and only overall assembly operation is carried out on site, so that construction time is short, quality is guaranteed, and influence on road traffic is small; the construction method has the advantages of short construction time, guaranteed construction quality, and small influence on high-speed road traffic, and can be widely used in highway overpass bridge construction.

[0009] The steel support frame strengthens the connection between the connecting crossbeam between the piers and the overpass steel bridge, and strengthens the stability of both, so that the stability of the steel support frame itself is good.

[0010] In any of the above schemes, preferably, the steel support frame comprises two groups of support columns arranged vertically and spaced apart, the top ends of the support columns are connected perpendicularly to the lower surface of the overpass steel bridge, a reinforcing and reinforcing mechanism is arranged between adjacent support columns, the reinforcing and reinforcing mechanism comprises a support crossbar and symmetrically arranged first and second inclined supports, the upper ends of the first and second inclined supports are connected to the overpass steel bridge, the other ends of the first and second inclined supports are fixed to the middle parts of the corresponding columns, the first and second inclined supports are respectively hinged with first and second inclined pull rods, the upper ends of the first and second inclined pull rods are respectively hinged to the two ends of the support crossbar, and two groups of locking mechanisms are arranged along the length direction of the support crossbar.

[0011] The reinforcing and reinforcing mechanism strengthens the connection between the columns and the overpass steel bridge, and strengthens the stability of both, so that the stability of the steel support frame itself is good.

[0012] In any of the above schemes, preferably, the locking mechanism comprises an upper screw rod, a lower screw rod and a rectangular frame, the upper edge frame of the rectangular frame has a first threaded hole threadedly connected with the upper screw rod, and the lower edge frame of the rectangular frame has a second threaded hole threadedly connected with the lower screw rod.

[0013] In any of the above schemes, preferably, the upper screw rod and the lower screw rod are fixedly connected with the overpass steel bridge and the support crossbar respectively, and the screw threads of the upper screw rod and the lower screw rod are opposite in rotation direction.

[0014] In any of the above schemes, preferably, the first inclined support is a circular pipe, the two ends of the first inclined support are respectively hinged with an upper hinge seat and a lower hinge seat, the upper hinge seat is fixed to the overpass steel bridge through a reinforcing bolt A and a cooperating nut A on the overpass steel bridge, and the lower hinge seat is fixed to the support column through a reinforcing bolt B and a cooperating nut B on the support column.

[0015] In any of the above schemes, preferably, a hoop A is detachably mounted on the first inclined support, and a hoop B is detachably mounted on the second inclined support, and the bottom ends of the first and second inclined pull rods are respectively hingedly connected with the hoop A and the hoop B.

[0016] The other end of the first inclined support and the second inclined support is fixed to the middle part of the corresponding stand column, and the first inclined support and the second inclined support are respectively hinged with a first inclined pull rod and a second inclined pull rod, and the upper end of the first inclined pull rod and the second inclined pull rod is respectively hinged to the two ends of the support horizontal rod, and two groups of locking mechanisms are arranged along the length direction of the support horizontal rod, and the support height is adjusted by changing the two groups of locking mechanisms, and the applicability of the device is improved.

[0017] In any of the above schemes, preferably, the hoop A includes a first half hoop and a second half hoop arranged oppositely, one end of the first half hoop is detachably connected with one end of the second half hoop through a locking bolt one, the other end of the first half hoop is detachably connected with the other end of the second half hoop through a locking bolt two, and the second half hoop has a hinged seat hinged with the first inclined pull rod.

[0018] In any of the above schemes, preferably, the support horizontal rod is a rectangular square tube.

[0019] In any of the above schemes, preferably, the bridge pier interconnecting cross beam is provided with a pre-embedded part, and the pre-embedded part is detachably connected with the bottom end of the support stand column.

[0020] In any of the above schemes, preferably, the steel bridge across the line is a hollow structure, and a reinforcing rib is welded inside.

[0021] The application also discloses a construction method of the large-span integral steel bridge. The steel support frame is installed at the bottom of the steel bridge across the line during construction. The combined part of the steel bridge across the line and the steel support frame is hoisted, and the steel bridge across the line is positioned by cooperation of the first bridge pier positioning slope and the bridge body positioning slope A, and the second bridge pier positioning slope and the bridge body positioning slope B. After the steel bridge across the line is hoisted in place, the steel support frame is fixed with the bridge pier interconnecting cross beam to realize reinforcement of the steel bridge across the line.

[0022] Compared with the prior art, the application has the following beneficial effects: The large-span integral steel bridge and the construction method have the beneficial effects that the combined part of the steel bridge across the line and the steel support frame is hoisted, the steel bridge across the line is positioned by cooperation of the first bridge pier positioning slope and the bridge body positioning slope A, and the second bridge pier positioning slope and the bridge body positioning slope B, and after the steel bridge across the line is hoisted in place, the steel support frame is fixed with the bridge pier interconnecting cross beam to realize reinforcement of the steel bridge across the line.

[0023] The large-span integral steel bridge and construction method described in this invention manufacture the overpass steel bridge in the factory, and only perform overall assembly operations on site. The construction time is fast, the quality is guaranteed, and the impact on road traffic is minimal. This construction method has the advantages of fast construction time, guaranteed construction quality, and minimal impact on highway traffic, and can be widely used in highway overpass construction.

[0024] The large-span integral steel bridge and construction method described in this invention strengthen the connection between the bridge pier connecting beams and the overpass steel bridge through the steel support frame, thereby enhancing the stability of both and achieving the goal of good stability of the steel support frame itself. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the steel support frame of the present invention; Figure 3 This is a structural diagram of the locking mechanism; In the diagram: 1. First pier; 2. Second pier; 3. Positioning ramp of first pier; 4. Positioning ramp of second pier; 5. Overpass steel bridge; 6. Connecting beam between piers; 7. Positioning ramp of bridge body A; 8. Positioning ramp of bridge body B; 9. Pier cap; 10. Precast pile foundation; 11. Bridge deck; 12. Support column; 13. First diagonal support; 14. Second diagonal support; 15. First diagonal tie rod; 16. Second diagonal tie rod; 17. Support crossbar; 18. Locking mechanism; 18.1. Upper screw; 18.2. Lower screw; 18.3. Rectangular frame; 19. Upper hinge seat; 20. Lower hinge seat; 21. Reinforcing bolt A; 22. Reinforcing bolt B; 23. Clamp A; 24. Clamp B. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings. The present invention will be further illustrated by specific embodiments, but it is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0028] Example 1, such as Figures 1-2As shown, the large-span integral steel bridge includes a pier cap 9 and precast pile foundations 10 connected to the pier cap 9, and also includes an overpass steel bridge 5. The upper surface of the overpass steel bridge 5 is the bridge deck 11. The upper surface of the pier cap 9 is provided with a first pier 1 and a second pier 2 at intervals. The first pier 1 and the second pier 2 are connected by an inter-pier connecting beam 6. The upper ends of the first pier 1 and the second pier 2 are respectively provided with a first pier positioning slope 3 and a second pier positioning slope 4. One side of the overpass steel bridge 5 is provided with a bridge body positioning slope A7 that cooperates with the first pier positioning slope 3, and the other side of the overpass steel bridge 5 is provided with a bridge body positioning slope B8 that cooperates with the second pier positioning slope 4. A steel support frame is provided between the overpass steel bridge 5 and the inter-pier connecting beam 6.

[0029] The overpass steel bridge 5 and the steel support frame assembly are hoisted. The first pier positioning ramp 3 and the bridge body positioning ramp A7, and the second pier positioning ramp 4 and the bridge body positioning ramp B8 are used to position the overpass steel bridge 5. After the overpass steel bridge 5 is hoisted into place, it is fixed by the connecting beam 6 between the steel support frame and the pier, thereby strengthening the overpass steel bridge 5.

[0030] The steel overpass 5 is manufactured in the factory, and only overall assembly is carried out on site. The construction time is fast, the quality is guaranteed, and the impact on road traffic is minimal. This construction method has the advantages of fast construction time, guaranteed construction quality, and minimal impact on highway traffic, and can be widely used in highway overpass construction.

[0031] The steel support frame strengthens the connection between the bridge pier connecting beam 6 and the overpass steel bridge 5, enhancing the stability of both, thereby achieving the goal of good stability of the steel support frame itself.

[0032] Example 2, as Figures 1-3 As shown, the large-span integral steel bridge includes a pier cap 9 and precast pile foundations 10 connected to the pier cap 9, and also includes an overpass steel bridge 5. The upper surface of the overpass steel bridge 5 is the bridge deck 11. The upper surface of the pier cap 9 is provided with a first pier 1 and a second pier 2 at intervals. The first pier 1 and the second pier 2 are connected by an inter-pier connecting beam 6. The upper ends of the first pier 1 and the second pier 2 are respectively provided with a first pier positioning slope 3 and a second pier positioning slope 4. One side of the overpass steel bridge 5 is provided with a bridge body positioning slope A7 that cooperates with the first pier positioning slope 3, and the other side of the overpass steel bridge 5 is provided with a bridge body positioning slope B8 that cooperates with the second pier positioning slope 4. A steel support frame is provided between the overpass steel bridge 5 and the inter-pier connecting beam 6.

[0033] Further, the steel support frame comprises two groups of support columns 12 arranged vertically and spaced apart, the top ends of the support columns 12 are connected perpendicularly to the lower surface of the steel bridge 5, a reinforcing and reinforcing mechanism is arranged between adjacent support columns 12, the reinforcing and reinforcing mechanism comprises a support cross bar 17 and symmetrically arranged first inclined support 13 and second inclined support 14, the upper ends of the first inclined support 13 and the second inclined support 14 are connected with the steel bridge 5, the other ends of the first inclined support 13 and the second inclined support 14 are fixed to the middle part of the corresponding column 12, the first inclined support 13 and the second inclined support 14 are respectively hinged with the first inclined rod 15 and the second inclined rod 16, the upper ends of the first inclined rod 15 and the second inclined rod 16 are respectively hinged to the two ends of the support cross bar 17, and two groups of locking mechanisms 18 are arranged along the length direction of the support cross bar 17. The reinforcing and reinforcing mechanism strengthens the connection between the column and the steel bridge 5, strengthens the stability of the two, so as to achieve the purpose of good stability of the steel support frame itself.

[0034] Further, the locking mechanism 18 comprises an upper screw 18.1, a lower screw 18.2 and a rectangular frame 18.3, the upper edge of the rectangular frame 18.3 is provided with a first threaded hole for threadedly connecting with the upper screw 18.1, and the lower edge of the rectangular frame 18.3 is provided with a second threaded hole for threadedly connecting with the lower screw 18.2.

[0035] Further, the upper screw 18.1 and the lower screw 18.2 are fixedly connected with the steel bridge 5 and the support cross bar 7 respectively, and the screw threads of the upper screw 18.1 and the lower screw 18.2 are opposite in rotation direction.

[0036] Further, the first inclined support 13 is a circular pipe, the two ends of the first inclined support 13 are respectively hinged with an upper hinge seat 19 and a lower hinge seat 20, the upper hinge seat 19 is fixed to the steel bridge 5 through a reinforcing bolt A 21 and a cooperating nut A, and the lower hinge seat 20 is fixed to the support column 12 through a reinforcing bolt B 22 and a cooperating nut B.

[0037] Further, the first inclined support 13 is detachably mounted with a hoop A 23, the second inclined support 14 is detachably mounted with a hoop B 24, and the bottom ends of the first inclined rod 15 and the second inclined rod 16 are hingedly connected with the hoop A 23 and the hoop B 24 respectively. The other ends of the first inclined support and the second inclined support are fixed to the middle part of the corresponding column, the first inclined support and the second inclined support are respectively hingedly connected with the first inclined rod and the second inclined rod, the upper ends of the first inclined rod and the second inclined rod are respectively hingedly connected to the two ends of the support cross bar, and two groups of locking mechanisms are arranged along the length direction of the support cross bar, the support height is adjusted by changing the two groups of locking mechanisms, and the applicability of the device is improved.

[0038] Further, the hoop A23 comprises oppositely arranged first and second half hoops, one end of the first half hoop is detachably connected with one end of the second half hoop through locking bolt one, the other end of the first half hoop is detachably connected with the other end of the second half hoop through locking bolt two, and the second half hoop is provided with a hinged seat hinged with the first inclined pull rod 15.

[0039] Further, the support cross bar 7 is a rectangular square tube.

[0040] Further, the pier interconnecting cross beam 6 is provided with a pre-embedded part 25, which is detachably connected with the bottom end of the support column 12.

[0041] Further, the cross-line steel bridge 5 is a hollow structure, and a reinforcing rib is welded inside the cross-line steel bridge 5.

[0042] In embodiment 3, the precast pile foundation 10 is pre-constructed, and then the pier cap 9, the first pier 1 and the second pier 2 are sequentially processed; The cross-line steel bridge 5 is pre-processed in a factory, and a steel support frame is installed at the bottom of the cross-line steel bridge 5 during construction; The combination of the cross-line steel bridge 5 and the steel support frame is hoisted, and the first pier positioning slope 3 and the bridge body positioning slope A7 and the second pier positioning slope 4 and the bridge body positioning slope B8 are matched to position the cross-line steel bridge 5; After the cross-line steel bridge 5 is hoisted into position, the steel support frame and the pier interconnecting cross beam 6 are fixed to reinforce the cross-line steel bridge 5.

[0043] The large-span integral steel bridge and the construction method disclosed by the application hoist the combination of the cross-line steel bridge and the steel support frame, match the first pier positioning slope and the bridge body positioning slope A and the second pier positioning slope and the bridge body positioning slope B to position the cross-line steel bridge, and after the cross-line steel bridge is hoisted into position, the steel support frame and the pier interconnecting cross beam are fixed to reinforce the cross-line steel bridge.

[0044] The large-span integral steel bridge and the construction method disclosed by the application manufacture the cross-line steel bridge in a factory, only perform integral assembly operation on site, construction time is fast, quality is guaranteed, and influence on road traffic is very small; the construction method has the advantages of fast construction time, guaranteed construction quality, and very small influence on high-speed road traffic, and can be widely used in highway cross-line bridge construction.

[0045] The large-span integral steel bridge and the construction method disclosed by the application strengthen the connection between the pier interconnecting cross beam and the cross-line steel bridge by the steel support frame, and strengthen the stability of the two, so that the purpose of good stability of the steel support frame itself is achieved.

[0046] The foregoing generally describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

[0047] The details of the present application not described above are well known to those skilled in the art.

Claims

1. A long-span integral steel bridge, comprising pier caps and precast pile foundations connected to the pier caps, characterized in that: It also includes an overpass steel bridge, the upper surface of which is the bridge deck. The upper surface of the pier cap is provided with a first pier and a second pier at intervals. The first pier and the second pier are connected by a pier connecting beam. The upper ends of the first pier and the second pier are respectively provided with a first pier positioning slope and a second pier positioning slope. One side of the overpass steel bridge is provided with a bridge body positioning slope A that cooperates with the first pier positioning slope. The other side of the overpass steel bridge is provided with a bridge body positioning slope B that cooperates with the second pier positioning slope. A steel support frame is provided between the overpass steel bridge and the pier connecting beam.

2. The long-span integral steel bridge according to claim 1, characterized in that, The steel support frame includes two sets of vertically arranged and spaced-apart support columns. The top of each support column is vertically connected to the lower surface of the overpass steel bridge. A reinforcement mechanism is provided between adjacent support columns. The reinforcement mechanism includes a support crossbar and symmetrically arranged first and second diagonal supports. The upper ends of the first and second diagonal supports are connected to the overpass steel bridge. The other ends of the first and second diagonal supports are fixed to the middle of the corresponding columns. A first and second diagonal tie rods are respectively hinged to the first and second diagonal supports. The upper ends of the first and second diagonal tie rods are respectively hinged to the two ends of the support crossbar. Two sets of locking mechanisms are spaced apart along the length of the support crossbar.

3. The long-span integral steel bridge according to claim 2, characterized in that, The locking mechanism includes an upper screw, a lower screw, and a rectangular frame. The upper frame of the rectangular frame has a first threaded hole that is threaded to the upper screw, and the lower frame of the rectangular frame has a second threaded hole that is threaded to the lower screw. The upper screw and the lower screw are fixedly connected to the cross-bridge and the support crossbar, respectively, and the threads of the upper screw and the lower screw have opposite directions.

4. The long-span integral steel bridge according to claim 3, characterized in that, The first inclined support is a round tube, and the two ends of the first inclined support are respectively hinged to an upper hinge seat and a lower hinge seat. The upper hinge seat is fixed to the overpass steel bridge by a reinforcing bolt A and a matching nut A. The lower hinge seat is fixed to the support column by a reinforcing bolt B and a matching nut B.

5. The long-span integral steel bridge according to claim 4, characterized in that, A clamp A is detachably installed on the first diagonal support, and a clamp B is detachably installed on the second diagonal support. The bottom ends of the first and second diagonal braces are hinged to clamp A and clamp B, respectively.

6. The long-span integral steel bridge according to claim 5, characterized in that, The clamp A includes a first half-clamp and a second half-clamp arranged opposite to each other. One end of the first half-clamp is detachably connected to one end of the second half-clamp by a locking bolt one, and the other end of the first half-clamp is detachably connected to the other end of the second half-clamp by a locking bolt two. The second half-clamp has a hinge seat that is hinged to the first diagonal tie rod.

7. The long-span integral steel bridge according to any one of claims 2-6, characterized in that, The supporting crossbar is a rectangular square tube.

8. The long-span integral steel bridge according to claim 7, characterized in that, The crossbeams connecting the bridge piers are equipped with embedded parts, which are detachably connected to the bottom of the supporting columns.

9. The long-span integral steel bridge according to claim 8, characterized in that, The overpass steel bridge is a hollow structure with internal reinforcing ribs welded in.

10. A construction method for a long-span integral steel bridge, characterized in that, The process includes the following steps: pre-constructing the precast pile foundation, and then sequentially fabricating the bridge pier cap, the first bridge pier, and the second bridge pier; The steel bridge is prefabricated in the factory, and a steel support frame is installed at the bottom of the bridge during construction. The assembly of the overpass steel bridge and steel support frame is hoisted, and the overpass steel bridge is positioned by using the positioning ramp of the first pier and the positioning ramp of the bridge body A, and the positioning ramp of the second pier and the positioning ramp of the bridge body B. After the overpass steel bridge is hoisted into place, it is fixed by the connecting beams between the steel support frame and the bridge piers to achieve the reinforcement of the overpass steel bridge.

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