Supporting structure for walking type incremental launching construction of large-span steel box girder

Abstract

The utility model discloses a supporting structure for large-span steel box girder walking type incremental launching construction, and relates to the technical field of bridge construction, the supporting structure comprises two first supporting seats, the upper surfaces of the first supporting seats are fixedly connected with first jacks, and the top ends of the first jacks are fixedly connected with a supporting table; an auxiliary supporting assembly capable of adjusting the supporting range is arranged between the two first supporting seats and comprises a first supporting plate, and through cooperative arrangement of the first supporting plate, the second supporting plate, the first U-shaped frame and other structures, during use, the second supporting plate is rotated, and the second supporting plate and the first supporting plate are located on the same horizontal plane; then the second U-shaped frame slides to be located at the hinged position of the first supporting plate and the second supporting plate, the hinged position is supported, the auxiliary supporting assembly is connected with the supporting table through the connecting assembly, and the problem that the supporting effect is reduced due to the fact that the supporting length of the auxiliary supporting mechanism cannot be adjusted is solved as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a support structure for walking-type jacking construction of a large-span steel box girder. Background Art

[0002] With the rapid development of transportation infrastructure construction, the volume of passenger and freight transportation on roads and railways is increasing day by day. Bridges play an important role in crossing obstacles, canyons and rivers. The requirements and difficulty of bridge construction are constantly increasing. When the span of the bridge increases and temporary piers cannot be set up due to the existence of existing buildings, the traditional bridge construction method can no longer meet the construction requirements. The jacking construction method originated from the longitudinal dragging of steel bridges. It is to set up a prefabrication yard behind the abutment along the axis of the bridge, set up temporary supports, jacking rails, horizontal jack force devices, and set steel guide beams in front of the structure. The bridge structure is pushed to the designated position through longitudinal jacking. This method has little impact on the traffic under the bridge, does not require large lifting equipment, and does not involve high-altitude operations. It has the characteristics of relatively low cost, fast progress, and wide application range.

[0003] The utility model patent with announcement number CN221029639U proposes a support structure for walking-type jacking construction, including a jacking device, the jacking device includes a slide arranged on the equipment body, a jacking platform connected to the top of the slide through a vertical jack, and also includes an auxiliary support mechanism and a clamping part. The auxiliary support mechanism includes a supporting base arranged on the side of the jacking device, a column connected to the top of the supporting base through a vertical jack, and a connecting groove is symmetrically opened on the upper end of the column, and a support platform is hinged in the connecting groove.

[0004] The above-mentioned support structure for walking-type jacking construction places the auxiliary support mechanism between two corresponding jacking devices, and drives the inner end of the movable support rod to move upward by controlling the lifting member, and adjusts the support platform to a horizontal state through the movable support rod, which is consistent with the height of the jacking platform. At the same time, with the cooperation of the clamping parts, the jacking platform and the support platform are connected together. At this time, when the jacking device drives the jacking platform to rise and jack the steel box girder, the jacking platform one and the jacking platform two operate synchronously, driving the jacking platform and the support platform to rise and fall synchronously to provide support for the steel box girder. However, when the length of the steel box girder is too long, the support length of the auxiliary support mechanism cannot be adjusted, resulting in a problem of reduced support effect. Utility Model Content

[0005] The purpose of the present invention is to solve or at least alleviate the problems existing in the prior art.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The lifting mechanism is a pair of fixedly mounted on two guide rails, and the two guide rails are connected along the longitudinal direction of the lifting link to the upper end of the lifting link, and the support rails are connected along the longitudinal direction of the lifting link to the upper end of the lifting link.

[0008] When the jack is lifted up, the two U-shaped supports are respectively moved to the bottom of the steel box girder, and the two support platforms are respectively abutted against the two ends of the lower surface of the steel box girder by the first jack to support the steel box girder. Then, the second support seat and the third support seat are moved between the two first support seats, and the first U-shaped frame and the second U-shaped frame are abutted against the first support plate and the steel box girder by the second jack to provide auxiliary support for the steel box girder and lift the steel box girder at the same time. When the length of the steel box girder is too long, the second support plate can be rotated to make the second support plate and the first support plate on the same horizontal plane, and then the second U-shaped frame can be slid so that the second U-shaped frame is respectively located at the hinge of the first support plate and the second support plate to support the hinge. Then, the auxiliary support assembly is connected to the support platform by the connecting assembly, thereby increasing the support area of ​​the steel box girder and reducing the stress effect of the bottom plate of the steel box girder during construction. This avoids as much as possible the problem that the support length of the auxiliary support mechanism cannot be adjusted when the length of the steel box girder is too long, resulting in reduced support effect.

[0009] Optionally, the connecting component includes a through hole opened on the side wall of the support platform, and slots are opened at both ends of the first support plate and the opposite ends of the two second support plates. Connecting plates are slidably connected in the through holes, and one end of the connecting plates is respectively plugged into the slots.

[0010] By adopting the above technical solution, the auxiliary support assembly can be connected to the support platform by sliding the connecting plate in the through hole and plugging one end of the connecting plate into the slot, thereby improving the stability of the auxiliary support assembly.

[0011] Optionally, the side walls on both sides of the second support seat are fixedly connected to two parallel fixed columns, and a fixing plate is sleeved on the fixing columns. The side wall of the fixing plate at one end away from the fixing column is provided with a fixing bolt, and the fixing bolt passes through the fixing plate and is respectively threadedly connected to the third support seat.

[0012] By adopting the above technical solution, after the two second U-shaped frames are moved to the hinged joint of the first support plate and the second support plate, the fixing plate is rotated and then one end of the fixing plate is threadedly connected to the third support seat through a fixing bolt, thereby preventing the second U-shaped frames from moving during use.

[0013] Optionally, a plurality of balls are rotatably connected to the upper surface of the second U-shaped frame, and the top ends of the balls are in contact with the lower surface of the first support plate.

[0014] By adopting the above technical solution, the second U-shaped frame can slide under the first support plate and the second support plate conveniently through the ball bearings.

[0015] Optionally, the end of the connecting plate away from the slot is fixedly connected to a limit plate, and the end of the support platform close to the limit plate is fixedly connected to two parallel limit rods, and the limit rods all pass through the limit plate to form a sliding connection.

[0016] By adopting the above technical solution, the sliding stability of the connecting plate in the through hole can be improved by the limiting rod and the limiting plate, making it easier to insert the connecting plate into the slot.

[0017] Optionally, a fixing block is threadedly connected to the limiting rod.

[0018] By adopting the above technical solution, after the connecting plate is inserted into the slot, the fixing block is rotated to abut against the connecting plate, thereby preventing the connecting plate from falling out of the slot.

[0019] Optionally, a first sliding groove is provided at both ends of the side walls on both sides of the first support plate, and a first sliding rod is fixedly connected to the first sliding groove, and a second sliding groove is provided at one end of the side walls on both sides of the second support plate close to one end of the first support plate, and a second sliding rod is fixedly connected to the second sliding groove, the first sliding groove is respectively connected to the second sliding groove, and the side walls on both sides of the inner side of the second U-shaped frame are fixedly connected to sliders, and the sliders are respectively mounted on the first sliding rod and slidably connected to the first sliding groove and the second sliding groove.

[0020] By adopting the above technical solution, the sliding stability of the second U-shaped frame can be improved through the first slide groove, the first slide rod and the slider. At the same time, when the first support plate and the second support plate are in a horizontal plane, the first slide groove and the second slide groove are aligned, and the first slide rod and the second slide rod are aligned, so that the slider can slide between the first slide groove and the second slide groove, so that the first slide rod and the second slide rod are located in the slider, thereby improving the stability of the hinge between the first support plate and the second support plate.

[0021] In summary, the beneficial effects of this application are as follows:

[0022] 1. The present application is provided with a coordination arrangement between the first support plate, the second support plate and the first U-shaped frame. When in use, the two first support seats are first moved to the bottom of the steel box beam, and the two support platforms are respectively abutted against the two ends of the lower surface of the steel box beam by the first jack to support the steel box beam. Then, the second support seat and the third support seat are moved between the two first support seats, and the first U-shaped frame and the second U-shaped frame are abutted against the first support plate and the steel box beam by the second jack to provide auxiliary support for the steel box beam. At the same time, the steel box beam is lifted. When the box girder is too long, the second support plate can be rotated to make the second support plate and the first support plate be at the same horizontal plane, and then the second U-shaped frame can be slid so that the second U-shaped frame is respectively located at the hinge of the first support plate and the second support plate to support the hinge, and then the auxiliary support assembly is connected to the support platform through the connecting assembly, thereby increasing the supporting area of ​​the steel box girder and reducing the stress of the bottom plate of the steel box girder during construction. This avoids as much as possible the problem that when the length of the steel box girder is too long, the support length of the auxiliary support mechanism cannot be adjusted, resulting in reduced support effect;

[0023] 2. The first slide groove, the first slide rod and the slider can improve the sliding stability of the second U-shaped frame. At the same time, when the first support plate and the second support plate are in a horizontal plane, the first slide groove and the second slide groove are aligned, and the first slide rod and the second slide rod are aligned, so that the slider can slide between the first slide groove and the second slide groove, so that the first slide rod and the second slide rod are located in the slider, thereby improving the stability of the hinge between the first support plate and the second support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0026] Figure 3 For the utility model Figure 1 Schematic diagram of the enlarged structure of area A in the middle;

[0027] Figure 4 For the utility model Figure 2Schematic diagram of the enlarged structure of area B in the middle.

[0028] Explanation of the accompanying drawings: 1. First support seat; 2. First jack; 3. Support platform; 4. First support plate; 5. Second support plate; 6. First U-shaped frame; 7. Second U-shaped frame; 8. Second support seat; 9. Third support seat; 10. Second jack; 11. Through hole; 12. Slot; 13. Connecting plate; 14. Fixing column; 15. Fixing plate; 16. Fixing bolt; 17. Ball; 18. Limiting plate; 19. Limiting rod; 20. Fixing block; 21. First slide groove; 22. First slide rod; 23. Second slide groove; 24. Second slide rod; 25. Slider. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 This application is described in further detail.

[0030] See also Figure 1-3 A support structure for walking-type jacking construction of a large-span steel box girder comprises two first support bases 1, the upper surface of the first support base 1 is fixedly connected to a first jack 2 for supporting lifting, the top of the first jack 2 is fixedly connected to a support platform 3 for supporting the steel box girder, an auxiliary support assembly with an adjustable support range is provided between the two first support bases 1, the auxiliary support assembly comprises a first support plate 4, a second support plate 5, a first U-shaped frame 6, a second U-shaped frame 7, a second support base 8, a third support base 9, and a second jack 10;

[0031] The second support plates 5 are provided with two and are respectively hinged to the two ends of the first support plate 4, the first U-shaped frame 6 is fixedly connected to the lower surface of the first support plate 4, the second U-shaped frame 7 is provided with two and is respectively located on both sides of the first U-shaped frame 6, the second U-shaped frame 7 is slidably arranged on the lower surface of the first support plate 4, the second support seat 8 is arranged below the first U-shaped frame 6, the third support seat 9 is provided with two and is located below the second U-shaped frame 7, the second jack 10 is provided with three and is respectively fixedly connected to the upper surface of the second support seat 8 and the third support seat 9, the top of the second jack 10 is respectively fixedly connected to the first U-shaped frame 6 and the second U-shaped frame 7, and the support platform 3 is provided with a connecting component for connecting to the auxiliary support component.

[0032] When in use, first move the two first support seats 1 to the bottom of the steel box girder, and use the first jack 2 to make the two support platforms 3 respectively abut the two ends of the lower surface of the steel box girder to support the steel box girder, and then move the second support seat 8 and the third support seat 9 between the two first support seats 1, and use the second jack 10 to make the first U-shaped frame 6 and the second U-shaped frame 7 abut the first support plate 4 with the steel box girder to provide auxiliary support for the steel box girder and lift the steel box girder at the same time. When the length of the steel box girder is too long, the second support plate 5 can be rotated to make the second support plate 5 and the first support plate 4 on the same horizontal plane, and then slide the second U-shaped frame 7 so that the second U-shaped frame 7 is respectively located at the hinge of the first support plate 4 and the second support plate 5 to support the hinge, and then connect the auxiliary support assembly to the support platform 3 through the connecting assembly to increase the support area of ​​the steel box girder and reduce the stress effect of the bottom plate of the steel box girder during construction. This avoids the problem that when the length of the steel box girder is too long, the support length of the auxiliary support mechanism cannot be adjusted, resulting in reduced support effect.

[0033] Reference Figure 2 The connecting component includes a through hole 11 opened on the side wall of the support platform 3, and slots 12 are opened at both ends of the first support plate 4 and the opposite ends of the two second support plates 5. Connecting plates 13 are slidably connected in the through holes 11, and one end of the connecting plate 13 is respectively plugged into the slots 12. By sliding the connecting plate 13 in the through hole 11 and plugging one end of the connecting plate 13 into the slots 12, the auxiliary support component can be connected to the support platform 3, thereby improving the stability of the support of the auxiliary support component.

[0034] Reference Figure 2 The side walls on both sides of the second support seat 8 are fixedly connected to two parallel fixed columns 14, and the fixed columns 14 are each sleeved with a fixing plate 15. The side wall of the fixing plate 15 at one end away from the fixing column 14 is provided with a fixing bolt 16. The fixing bolt 16 passes through the fixing plate 15 and is threadedly connected to the third support seat 9 respectively. After the two second U-shaped frames 7 are moved to the hinged position of the first support plate 4 and the second support plate 5, by rotating the fixing plate 15 and then threading one end of the fixing plate 15 with the third support seat 9 through the fixing bolt 16, the second U-shaped frame 7 can be prevented from moving during use.

[0035] Reference Figure 2 The upper surface of the second U-shaped frame 7 is rotatably connected to a plurality of balls 17, and the top of the balls 17 abuts against the lower surface of the first support plate 4, so that the second U-shaped frame 7 can slide under the first support plate 4 and the second support plate 5 through the balls 17.

[0036] Reference Figure 2The end of the connecting plate 13 away from the slot 12 is fixedly connected to the limiting plate 18, and the end of the support platform 3 close to the limiting plate 18 is fixedly connected to two parallel limiting rods 19. The limiting rods 19 all pass through the limiting plate 18 and form a sliding connection. The limiting rods 19 and the limiting plate 18 can improve the sliding stability of the connecting plate 13 in the through hole 11, making it easier for the connecting plate 13 to be inserted into the slot 12.

[0037] Reference Figure 2 The limiting rod 19 is threadedly connected to a fixing block 20 . After the connecting plate 13 is inserted into the slot 12 , the fixing block 20 is rotated to abut against the connecting plate 13 to prevent the connecting plate 13 from being separated from the slot 12 .

[0038] Reference Figure 2 、 Figure 3 and Figure 4 , a first slide groove 21 is opened at both ends of the side walls of both sides of the first support plate 4, and a first slide rod 22 is fixedly connected to the first slide groove 21. A second slide groove 23 is opened at one end of the side walls of both sides of the second support plate 5 close to the end of the first support plate 4, and a second slide rod 24 is fixedly connected to the second slide groove 23. The first slide groove 21 is respectively connected to the second slide groove 23. The side walls on both sides of the inner side of the second U-shaped frame 7 are fixedly connected with sliders 25. The sliders 25 are respectively sleeved on the first slide rod 22 and are in the first slide groove 21 and the second slide groove 23. The sliding connection, through the first slide groove 21, the first slide bar 22 and the slider 25, can improve the sliding stability of the second U-shaped frame 7. At the same time, when the first support plate 4 and the second support plate 5 are in a horizontal plane, the first slide groove 21 and the second slide groove 23 are aligned, and the first slide bar 22 and the second slide bar 24 are aligned, so that the slider 25 can slide between the first slide groove 21 and the second slide groove 23, so that the first slide bar 22 and the second slide bar 24 are located in the slider 25, thereby improving the stability of the hinge of the first support plate 4 and the second support plate 5.

[0039] The implementation principle of this application is as follows: when in use, first move the two first support seats 1 to the bottom of the steel box beam, and use the first jack 2 to make the two support platforms 3 respectively contact the two ends of the lower surface of the steel box beam to support the steel box beam, and then move the second support seat 8 and the third support seat 9 between the two first support seats 1, and use the second jack 10 to make the first U-shaped frame 6 and the second U-shaped frame 7 contact the first support plate 4 with the steel box beam to provide auxiliary support for the steel box beam and jack up the steel box beam at the same time. When the length of the steel box beam is too long, the second support plate 5 can be rotated to connect the second support plate 5 with the first support plate 4 is in the same horizontal plane, and then the second U-shaped frame 7 is slid so that the second U-shaped frame 7 is respectively located at the hinge of the first support plate 4 and the second support plate 5 to support the hinge. Then, by sliding the connecting plate 13 in the through hole 11, one end of the connecting plate 13 is plugged into the slot 12, and the auxiliary support assembly can be connected to the support platform 3, thereby improving the support stability of the auxiliary support assembly, increasing the support area of ​​the steel box girder, and reducing the stress of the bottom plate of the steel box girder during construction. It is also avoided as much as possible that when the length of the steel box girder is too long, the support length of the auxiliary support mechanism cannot be adjusted, resulting in reduced support effect.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A support structure for long-span steel box girder walking-type jacking construction, comprising two first support seats (1), wherein the upper surface of the first support seat (1) is fixedly connected to a first jack (2), and the top of the first jack (2) is fixedly connected to a support platform (3), and an auxiliary support assembly with an adjustable support range is provided between the two first support seats (1), characterized in that: The auxiliary support assembly comprises a first support plate (4), the first support plate (4) having second support plates (5) hingedly connected at both ends thereof, a first U-shaped frame (6) being fixedly connected to the lower surface of the first support plate (4), second U-shaped frames (7) being provided on both sides of the first U-shaped frame (6), the second U-shaped frame (7) being slidably arranged on the lower surface of the first support plate (4), a second support seat (8) and a third support seat (9) being provided below the first U-shaped frame (6) and the second U-shaped frame (7), the upper surfaces of the second support seat (8) and the third support seat (9) being fixedly connected to second jacks (10), the top ends of the second jacks (10) being fixedly connected to the first U-shaped frame (6) and the second U-shaped frame (7), respectively, and a connecting assembly for connecting with the auxiliary support assembly being provided on the support platform (3).

2. The support structure for walking-type jacking construction of a large-span steel box girder according to claim 1, characterized in that: The connecting assembly comprises a through hole (11) provided on the side wall of the support platform (3), slots (12) are provided at both ends of the first support plate (4) and at the opposite ends of the two second support plates (5), and connecting plates (13) are slidably connected in the through hole (11), and one end of the connecting plate (13) is respectively plugged into the slot (12).

3. The support structure for walking-type jacking construction of a large-span steel box girder according to claim 2, characterized in that: The side walls on both sides of the second support seat (8) are fixedly connected to two parallel fixed columns (14), and the fixed columns (14) are each sleeved with a fixed plate (15). The side wall of one end of the fixed plate (15) away from the fixed column (14) is provided with a fixing bolt (16), and the fixing bolt (16) passes through the fixing plate (15) and is respectively threadedly connected to the third support seat (9).

4. The support structure for walking-type jacking construction of a large-span steel box girder according to claim 3, characterized in that: The upper surface of the second U-shaped frame (7) is rotatably connected to a plurality of balls (17), and the top ends of the balls (17) are in contact with the lower surface of the first support plate (4).

5. The support structure for walking-type jacking construction of a large-span steel box girder according to claim 4, characterized in that: One end of the connecting plate (13) away from the slot (12) is fixedly connected to a limit plate (18), and one end of the support platform (3) close to the limit plate (18) is fixedly connected to two parallel limit rods (19), and the limit rods (19) both pass through the limit plate (18) to form a sliding connection.

6. The supporting structure for walking-type jacking construction of a large-span steel box girder according to claim 5, characterized in that: A fixing block (20) is threadedly connected to the limiting rod (19).

7. The support structure for walking-type jacking construction of a large-span steel box girder according to claim 6, characterized in that: The first support plate (4) has first sliding grooves (21) at both ends of the side walls on both sides, and first sliding rods (22) are fixedly connected in the first sliding grooves (21). The second support plate (5) has second sliding grooves (23) at one end of the side walls on both sides close to the end of the first support plate (4), and second sliding rods (24) are fixedly connected in the second sliding grooves (23). The first sliding grooves (21) are respectively connected to the second sliding grooves (23).

8. The support structure for walking-type jacking construction of a large-span steel box girder according to claim 7, characterized in that: Sliders (25) are fixedly connected to the inner side walls of the second U-shaped frame (7), and the slides (25) are respectively sleeved on the first slide rod (22) and slidably connected to the first slide groove (21) and the second slide groove (23).

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