Prefabricated box girder approach bridge jacking replacement support structure

Abstract

The utility model relates to a prefabricated box girder approach bridge jacking and replacing support structure. According to the scheme, the prefabricated box girder approach bridge jacking and replacing support structure comprises a prefabricated box girder, a self-stabilizing hoop body, a limiting device, a moving trolley, a steel pipe auxiliary supporting hoop jacking platform structure, a non-support jacking structure fixed to a cover beam, a steel box girder wet joint limiting device, a hanging type construction platform structure and a support moving, falling and replacing structure. The construction process is simplified, the labor input is reduced, the installation efficiency of the bridge replacement support is improved, and the construction difficulty is reduced.

Description

Technical Field

[0001] This application relates to the technical field of civil engineering, and particularly to a structure for jacking up and replacing bearings of a precast box girder approach bridge. Background Art

[0002] With the continuous development of the transportation industry, highway bridges need to bear an increasing load, thus posing higher requirements for the bearing capacity of bridges. The bearing capacity of bridge bearings will directly affect the quality of highways, and highway quality will also determine the bearing capacity of bridge bearings. Therefore, once the bridge bearings are damaged, it will affect the quality of the bridge structure, thus leading to potential safety hazards in the bridge structure. To address this issue, it is necessary to promptly handle severely damaged bridge bearings and, if necessary, replace them to ensure the normal use of the bridge.

[0003] The construction of jacking up and replacing bearings of precast box girder approach bridges will encounter the following difficulties: (1) When jacking up the bridge at the approach bridge without a capping beam, the space is limited, and the jacking equipment cannot take a position, making the operation difficult; (2) If the traditional method of erecting the construction platform support is used, the erection work is cumbersome, the construction time is long, and the procedures are complicated; (3) Installing the new bearing into a narrow space using the traditional manual installation method is difficult and has a high safety risk coefficient.

[0004] In view of this, in response to a series of problems that occur during the construction of jacking up and replacing bearings of precast box girder approach bridges, it is urgent to invent a simple and effective structure for jacking up and replacing bearings of precast box girder approach bridges to reduce the construction difficulty of erecting the traditional construction platform, simplify the construction procedures, reduce the construction difficulty, reduce the construction safety risk, and speed up the construction progress. Summary of the Utility Model

[0005] The purpose of this application is to provide a structure for jacking up and replacing bearings of a precast box girder approach bridge in view of the above problems existing in the prior art.

[0006] To achieve the above application purpose, the following technical solutions are adopted in this application: The structure for jacking up and replacing bearings of a precast box girder approach bridge includes a pile foundation, a pier column provided on the pile foundation, a capping beam provided on the pier column, a bearing provided on the capping beam, and a precast box girder provided on the bearing, and further includes:

[0007] A limiting device, which is provided at the wet joint of the precast box girder and fixed by a tie rod for limiting the precast box girder;

[0008] A hanging construction platform structure, which is installed on the capping beam through a balance beam, and a platform panel is laid on the platform cross beam, and railings are set around to form a hanging construction platform structure;

[0009] The steel pipe auxiliary support hoop jacking platform structure includes a hoop platform arranged at the top of the pier column, a flexible gasket arranged between the hoop platform and the pier column, the tops of multiple steel pipes connected to the hoop platform through ear plates, a self-stabilizing hoop body for fixing the pipe body of the steel pipe and the pier column, and a horizontal bracing frame;

[0010] The fixed bracketless jacking structure for the capping beam includes a leveling steel plate arranged on the capping beam and a jack arranged on the leveling steel plate, and the jack is arranged between the top of the hoop platform and the bottom of the precast box girder;

[0011] The support moving and positioning structure includes a moving frame arranged on the outside of the capping beam, a special-shaped tension frame for connecting the moving frame and the pier column, a moving trolley for transporting a new support, a track arranged between the capping beam and the moving frame, and a track diagonal brace arranged between the track and the pier column. The moving trolley is connected to the moving frame through a steel wire rope.

[0012] Furthermore, the limiting device includes an upper vertical plate, a lower vertical plate, and rib plates arranged between the upper vertical plate and the lower vertical plate. A pull rod is arranged at the top of the upper vertical plate, and a fixing hole is arranged on the lower vertical plate.

[0013] Furthermore, a flexible gasket cooperating with the limiting device is arranged at the bottom of the precast box girder.

[0014] Furthermore, the hanging construction platform structure further includes a hanging profiled steel. Through the insertion holes and fixing bolts arranged on the hanging profiled steel, the hanging profiled steel is arranged on the lifting beam, and the bottom of the hanging profiled steel is connected to the platform cross beam.

[0015] Furthermore, the self-stabilizing hoop body includes a fixing frame and a telescopic rod. Telescopic rods are arranged around the fixing frame, and fixing rotating rods and fixing rings are arranged on the telescopic rods.

[0016] Furthermore, the moving frame includes a cross bar, a vertical bar, and an inclined vertical bar. Moving devices are arranged at the bottoms of the vertical bar and the inclined vertical bar. A steel wire rope is arranged on the cross bar, and a moving trolley is arranged below the steel wire rope.

[0017] Furthermore, the moving trolley includes a stress rod, a jacking device, a driving device, and a movable rod. A lifting lug is arranged on the stress rod.

[0018] Furthermore, the new support is fixed in the moving trolley through a binding strap.

[0019] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0020] 1. The utility model develops a limiting device for the wet joint of the steel box girder. In the wet joint, the relative positions of the two sides of the steel box girder are limited through the pull rod and the fixing hole, ensuring reasonable load transfer after replacing the support and effectively guaranteeing driving safety.

[0021] 2. The utility model proposes a hanging construction platform technology. The construction platform is hung on the capping beam and adopts a quick-detachable structural system, which reduces the construction difficulty and the labor input cost.

[0022] 3. The utility model proposes a steel box girder jacking construction technology. By adopting the steel pipe assisted support hoop jacking platform technology and the bracketless jacking technology fixed on the capping beam, the problem of the jack occupancy during the steel box girder jacking under different types is solved, the construction process is simplified, and the work efficiency is improved.

[0023] 4. The utility model proposes a bearing moving, positioning and replacement technology. A moving trolley is developed, which solves the problem of bearing installation in a narrow space and reduces the installation difficulty and safety risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the longitudinal section of the bridge in the approach section of the utility model;

[0025] Figure 2 It is a construction schematic diagram of the box girder wet joint limiting device;

[0026] Figure 3 It is a schematic diagram of the limiting device;

[0027] Figure 4 It is a schematic diagram of the hanging construction platform;

[0028] Figure 5 It is a schematic diagram of the steel pipe assisted support hoop jacking platform;

[0029] Figure 6 It is a schematic diagram of the ear plate structure;

[0030] Figure 7 It is a schematic diagram of the self-stabilizing hoop system;

[0031] Figure 8 It is a schematic diagram of the steel pipe assisted support hoop jacking;

[0032] Figure 9 It is a construction schematic diagram of the moving support;

[0033] Figure 10 It is a schematic diagram of the moving trolley;

[0034] Figure 11 It is a translation sectional view of the moving trolley;

[0035] Figure 12 It is a translation plan view of the moving trolley.

[0036] In the figure: 1, precast box girder; 2, bearing; 3, rubble slope protection; 4, abutment; 5, expansion joint; 6, bridge approach transition section; 7, filling soil; 8, slate; 9, fine silt; 10, pile foundation; 11, pier column; 12, flexible washer; 13, ear plate; 14, expansion bolt; 15, steel pipe; 16, horizontal bracing frame; 17, self-stabilizing hoop body; 18, ground; 19, hoop platform; 20, bolt hole; 21, fixing frame; 22, fixed rotating rod; 23, telescopic rod; 24, fixing ring; 25, jack; 26, leveling steel plate; 27, cushion stone; 28, capping beam; 29, limiting device; 30, wet joint; 31, flexible gasket; 32, tie rod; 33, upper vertical plate; 34, rib plate; 35, lower vertical plate; 36, fixing hole; 37, fixing bolt; 38, crossbeam; 39, hanging type steel section; 40, groove; 41, insertion hole; 42, platform panel; 43, platform crossbeam; 44, railing; 45, moving device; 46, inclined vertical rod; 47, vertical rod; 48, special-shaped tension frame; 49, crossbar; 50, moving trolley; 51, jacking device; 52, lifting lug; 53, movable rod; 54, new bearing; 55, driving device; 56, strap; 57, stress rod; 58, track brace; 59, track; 60, bearing position; 61, moving frame; 62, steel wire rope. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0038] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present application.

[0039] Embodiment 1

[0040] As Figure 1 shown, the geological conditions of the approach bridge are composed of filling soil 7, fine silt 9, and slate 8 respectively. The pile foundation 10 enters the slate 8, the pier column 11 is arranged on the pile foundation 10, the capping beam 28 is arranged on the pier column 11, the bearing 2 is arranged on the capping beam 28, the precast box girder 1 is arranged on the bearing 2, the rubble slope protection 3 is adopted at the place with a large slope of the approach bridge ground 18, and the expansion joint 5 is arranged at the abutment 4.

[0041] As Figure 2 、 Figure 3 shown, a limiting device 29 is provided at the wet joint 30 of the precast box girder 1. The limiting device 29 is fixed by a tie rod 32. A flexible gasket 31 is provided at the bottom of the precast box girder 1. The limiting device 29 is composed of an upper vertical plate 33, a lower vertical plate 35, and a rib plate 34. A fixing hole 36 is provided on the lower vertical plate 35.

[0042] As Figure 4 shown, a crossbeam 38 is provided on the capping beam 28. A groove 40 is provided on the crossbeam 38. A through hole 41 and a fixing bolt 37 are provided on the suspended rolled steel 39. The suspended rolled steel 39 is arranged on the crossbeam 38. The bottom of the suspended rolled steel 39 is connected to the platform crossbeam 43. A platform panel 42 is laid on the platform crossbeam 43. Railings 44 are provided around the platform.

[0043] As Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 shown, a hoop platform 19 is provided at the top of the pier column 11. A flexible washer 12 is provided between the hoop platform 19 and the pier column 11. The hoop platform 19 is provided with ear plates 13. Bolt holes 20 are provided on the ear plates 13. The bottom of the ear plates 13 is connected to the steel pipe 15. The steel pipe 15 is fixed by tightening the expansion screw 14. A horizontal bracing frame 16 is directly provided on the steel pipe 15. The steel pipe 15 is connected to the pier column 11 through a self-stabilizing hoop body 17. The self-stabilizing hoop body 17 is composed of a fixing frame 21, a telescopic rod 23, a fixing ring 24, etc. Telescopic rods 23 are provided around the fixing frame 21. Fixing rotating rods 22 and fixing rings 24 are provided on the telescopic rods 23. A jack 25 is provided on the hoop platform 19. A cushion stone 27 is provided below the bearing 2.

[0044] As Figure 4 shown, a leveling steel plate 26 is provided on the capping beam 28. A jack 25 is provided on the leveling steel plate 26.

[0045] As Figure 9 、 Figure 10 、 Figure 11 、 Figure 12As shown in the figure, a movable frame 61 is arranged on the outside of the capping beam 28. The movable frame 61 is connected to the pier column 11 through a special-shaped tension frame 48. The movable frame 61 is composed of a cross bar 49, a vertical bar 47, an inclined vertical bar 46, etc. A moving device 45 is respectively arranged at the bottom of the vertical bar 47 and the inclined vertical bar 46. A steel wire rope 62 is arranged on the cross bar 49. A moving trolley 50 is arranged below the steel wire rope 62. The moving trolley 50 is composed of a stress bar 57, a jack 51, a driving device 55, a movable bar 53, etc. A lifting lug 52 for connecting the steel wire rope 62 is arranged on the stress bar 57. A new bearing 54 is placed in the moving trolley 50. The new bearing 54 is fixed by a binding band 56. A track 59 is arranged between the capping beam 28 and the movable frame 61. A track diagonal brace 58 is arranged between the track 59 and the pier column 11. The new bearing 54 is transported to the bearing position 60 by the moving trolley 50.

[0046] Embodiment 2

[0047] For the construction of Embodiment 1, the construction method of the precast box girder approach bridge jacking and bearing replacement structure in this embodiment includes the following steps:

[0048] 1) Steel box girder limit; The wet joint limit of the box girder is constructed by using a limiting device. A limiting device 29 is arranged at the wet joint 30 of the precast box girder 1. The limiting device 29 is fixed by a tie rod 32. A flexible gasket 31 is arranged at the bottom of the precast box girder 1. The limiting device 29 is composed of an upper vertical plate 33, a lower vertical plate 35, and a rib plate 34. A fixing hole 36 is arranged on the lower vertical plate 35.

[0049] 2) Construction platform erection; The hanging construction platform structure is adopted for the hanging construction platform. A shoulder beam 38 is arranged on the capping beam 28. A groove 40 is arranged on the shoulder beam 38. A hanging hole 41 and a fixing bolt 37 are arranged on the hanging section steel 39. The hanging section steel 39 is arranged on the shoulder beam 38. The bottom of the hanging section steel 39 is connected to the platform cross beam 43. A platform panel 42 is laid on the platform cross beam 43. Railings 44 are arranged around the platform.

[0050] 3) Steel box girder jacking; According to the structural form, the steel pipe assisted support and hoop jacking platform technology and the jacking technology without brackets fixed to the capping beam can be adopted for the box girder jacking. A hoop platform 19 is arranged on the top of the pier column 11. A flexible gasket 12 is arranged between the hoop platform 19 and the pier column 11. An ear plate 13 is arranged on the hoop platform 19. A bolt hole 20 is arranged on the ear plate 13. The bottom of the ear plate 13 is connected to the steel pipe 15. The expansion screw 14 is tightened to fix the steel pipe 15. A horizontal bracing frame 16 is directly arranged on the steel pipe 15. The steel pipe 15 is connected to the pier column 11 through a self-stabilizing hoop body 17. The self-stabilizing hoop body 17 is composed of a fixing frame 21, a telescopic rod 23, a fixing ring 24, etc. Telescopic rods 23 are arranged around the fixing frame 21. A fixing screw rod 22 and a fixing ring 24 are arranged on the telescopic rod 23. A jack 25 is arranged on the hoop platform 19. A bearing pad 27 is arranged below the bearing 2. A leveling steel plate 26 is arranged on the capping beam 28. A jack 25 is arranged on the leveling steel plate 26.

[0051] 4) Construction of bearing replacement; The bearing replacement adopts the bearing moving and positioning technology. A moving frame 61 is arranged outside the capping beam 28. The moving frame 61 is connected to the pier column 11 through a special-shaped tension frame 48. The moving frame 61 is composed of a cross bar 49, vertical bars 47, inclined vertical bars 46, etc. Moving devices 45 are respectively arranged at the bottoms of the vertical bars 47 and the inclined vertical bars 46. A steel wire rope 62 is arranged on the cross bar 49. A moving trolley 50 is arranged below the steel wire rope 62. The moving trolley 50 is composed of a stress rod 57, a jack 51, a driving device 55, a movable rod 53, etc. A lifting lug 52 is arranged on the stress rod 57. A new bearing 54 is placed in the moving trolley 50. The new bearing 54 is fixed by a binding band 56. A track 59 is arranged between the capping beam 28 and the moving frame 61. A track diagonal brace 58 is arranged between the track 59 and the pier column 11. The new bearing 54 is transported to the bearing position 60 by the moving trolley 50.

[0052] The parts not described in detail in this application are prior art, so this application does not describe them in detail.

[0053] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of this element can be multiple. The term "a" cannot be understood as a limitation on the quantity.

[0054] Although many technical terms are used in this article, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of this application; interpreting them as any additional limitation is contrary to the spirit of this application.

[0055] This application is not limited to the above best implementation mode. Anyone can obtain other various forms of products under the inspiration of this application. However, no matter what changes are made in its shape or structure, as long as it has a technical solution identical or similar to this application, it falls within the protection scope of this application.

Claims

1. A prefabricated box girder approach bridge jacking and replacement support structure, comprising a pile foundation (10), a pier (11) arranged on the pile foundation (10), a cap beam (28) arranged on the pier (11), a support (2) arranged on the cap beam (28), and a prefabricated box girder (1) arranged on the support (2), characterized in that: Also includes: A limiting device, disposed at a wet joint (30) of the prefabricated box girder (1) and fixed via a tie rod (32), for limiting the position of the prefabricated box girder (1); The hanging construction platform structure is installed on the cap beam (28) through a shoulder beam (38), and the hanging construction platform structure is formed by laying a platform panel (42) on the platform cross beam (43) and arranging a railing (44) around it; A steel pipe auxiliary support hoop jacking platform structure, comprising a hoop platform (19) arranged on the top of a pier column (11), a flexible gasket (12) arranged between the hoop platform (19) and the pier column (11), the tops of a plurality of steel pipes (15) connected to the hoop platform (19) via ear plates (13), a self-stabilizing hoop body (17) and a flat coupling frame (16) for fixing the pipe body of the steel pipe (15) and the pier column (11); A bracket-free jacking structure fixed to the cap beam comprises a leveling steel plate (26) arranged on the cap beam (28), and a jack (25) arranged on the leveling steel plate (26), wherein the jack (25) is arranged between the top of the hoop platform (19) and the bottom of the prefabricated box beam (1); The support moving and landing structure comprises a moving frame (61) arranged outside a cap beam (28), a special-shaped pulling frame (48) for connecting the moving frame (61) and a pier (11), a moving trolley (50) for transporting a new support (54), a track (59) arranged between the cap beam (28) and the moving frame (61), and a track diagonal brace (58) arranged between the track (59) and the pier (11), wherein the moving trolley (50) is connected to the moving frame (61) via a steel wire rope (62).

2. The prefabricated box girder approach bridge jacking and replacement support structure according to claim 1 is characterized in that: The limiting device (29) comprises an upper vertical plate (33), a lower vertical plate (35), and ribs (34) provided on the upper vertical plate (33) and the lower vertical plate (35); a pull rod (32) is provided on the top of the upper vertical plate (33), and a fixing hole (36) is provided on the lower vertical plate (35).

3. The prefabricated box girder approach bridge jacking and replacement support structure according to claim 2 is characterized in that: A flexible gasket (31) cooperating with the limiting device (29) is provided at the bottom of the prefabricated box beam (1).

4. The prefabricated box girder approach bridge jacking and replacement support structure according to claim 1 is characterized in that: The hanging construction platform structure also includes a hanging steel section (39). The hanging steel section (39) is provided with a through hole (41) and a fixing bolt (37), and the hanging steel section (39) is arranged on the shoulder beam (38). The bottom of the hanging steel section (39) is connected to the platform cross beam (43).

5. The prefabricated box girder approach bridge jacking and replacement support structure according to claim 1 is characterized in that: The self-stabilizing hoop body (17) comprises a fixing frame (21) and a telescopic rod (23). The fixing frame (21) is provided with telescopic rods (23) around it, and the telescopic rod (23) is provided with a fixed rotating rod (22) and a fixing ring (24).

6. The prefabricated box girder approach bridge jacking and replacement support structure according to any one of claims 1 to 5, characterized in that: The movable frame (61) comprises a crossbar (49), a vertical bar (47), and an oblique vertical bar (46); a moving device (45) is provided at the bottom of the vertical bar (47) and the oblique vertical bar (46); a steel wire rope (62) is provided on the crossbar (49); and a movable trolley (50) is provided below the steel wire rope (62).

7. The prefabricated box girder approach bridge jacking and replacement support structure according to claim 6 is characterized in that: The movable trolley (50) comprises a force-bearing rod (57), a pusher (51), a driving device (55), and a movable rod (53); the force-bearing rod (57) is provided with a lifting lug (52).

8. The prefabricated box girder approach bridge jacking and replacement support structure according to claim 1 is characterized in that: The new support (54) is fixed in the moving trolley (50) by means of a binding belt (56).

Images