Sectional on-site rapid assembling structure for steel box girder and construction method

Abstract

The invention discloses a steel box girder segment on-site rapid splicing structure and a construction method, and relates to the technical field of steel box girder installation. Comprising a bridge pier column, and a bridge bent cap is arranged on the bridge pier column; an upper truss is laid and installed on a bridge cover beam, a lower truss is arranged in the middle of the upper truss, and the height of the lower truss is lower than that of the upper truss on the two sides. A temporary buttress is erected in the lower truss, a beam transporting device is installed on the temporary buttress, the top of the beam transporting device is higher than the upper truss, and the height difference ranges from 10 cm to 50 cm; a counter-pulling traction device is installed outside the upper truss, a sliding way is installed at the end of the counter-pulling traction device, the sliding way communicates with the beam transporting device, and the end of the sliding way is fixedly installed at the top of the upper truss. The technical problems that in the existing steel box girder hoisting process, the positions of the steel box girders are adjusted through movement of a hoisting arm, operation is inconvenient, and the butt joint difficulty between the steel box girders is high are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel box girder installation, and in particular relates to a steel box girder segmented on-site rapid assembly structure and a construction method. Background Art

[0002] In recent years, structural reform of the construction industry has become a general trend. Compared with traditional concrete buildings, steel structure buildings have obvious advantages in energy conservation and emission reduction. At present, steel box girders have been widely used in urban overpasses and building structures in my country.

[0003] Steel box girders usually need to be manufactured by qualified manufacturers using an integral frame and longitudinal sections, and then transported to the site for assembly by hoisting. In the existing steel box girder hoisting process, the position of the steel box girder is adjusted by moving the boom, which is inconvenient to operate, and the connection between steel box girders is difficult and inefficient. In addition, the operation of the hoisting equipment is also restricted by the geological conditions under the bridge and the surrounding structures.

[0004] Therefore, there is a need for a steel box girder segmented on-site rapid assembly structure and construction method as mentioned in the present invention. Summary of the invention

[0005] The purpose of the present invention is to provide a steel box girder segmented rapid on-site assembly structure and construction method to solve the problems raised in the above-mentioned background technology. The solution has excellent quality, safety and reliability, economy and environmental protection, and can effectively ensure installation accuracy and installation quality.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A steel box girder segment on-site rapid assembly structure comprises: a bridge pier, a bridge cap beam is arranged on the bridge pier; an upper truss is laid and installed on the bridge cap beam, a lower truss is arranged in the middle of the upper truss, and the height of the lower truss is lower than the height of the upper trusses on both sides;

[0008] A temporary pier is set up inside the lower truss, and a beam transport device is installed on the temporary pier. The top height of the beam transport device is higher than the height of the upper truss, and the height difference is 10-50cm;

[0009] A reverse pulling device is installed outside the upper truss, and a slideway is installed at the end of the reverse pulling device. The slideway is connected to the beam transport device and the end of the slideway is fixedly installed on the top of the upper truss.

[0010] In a further technical solution, two parallel slideways are provided, and the ends thereof are fixed to the top of the upper truss by bolt connection.

[0011] In a further technical solution, the beam transport device is installed on a slideway, and the reverse pulling device is installed on a bridge cap beam located outside the upper truss;

[0012] The reverse pulling device includes a pulling rope, and a limit hook frame is installed outside the slideway. The pulling rope passes through the limit hook frame outside the slideway and is connected to the beam transport device, which is suitable for the pulling rope to move along the direction of the bridge cap beam.

[0013] In a further technical solution, a steel box beam segment is installed on the beam transport device of the slideway, and a limiting device is provided at the position, one end of the limiting device is rotatably connected to the slideway, and the top is suitable for abutting against the slideway.

[0014] In a further technical solution, the traction ropes on the anti-pull traction device are marked in sequence according to the length of the steel box girder segment, and the steel box girder segment is provided with multiple groups;

[0015] During reverse pulling, the operator controls the pulling distance by the marked position on the pulling rope.

[0016] In a further technical solution, the reverse pulling traction device comprises a traction machine and a traction disk, the traction telescopically connected to the traction disk, the output end of the traction machine is connected to the traction disk, and the traction machine is suitable for driving the traction disk to rotate;

[0017] The upper trusses on both sides of the lower truss are respectively installed with a right angle frame 1 and a right angle frame 2, and guide wheels are installed in the right angle frame 1 and the right angle frame 2, which are suitable for guiding the traction rope.

[0018] In a further technical solution, a guide wheel is installed in the right angle frame, and a transition wheel is installed in the limit hook frame, a wheel frame is installed outside the transition wheel and fixed in the limit hook frame, and a transition wheel is installed on one side of the phase transport beam device;

[0019] The transition wheel is a concave wheel and is suitable for abutting against the traction rope;

[0020] The guide wheel 1 is arranged in parallel with the transition wheel and is suitable for traction, telescopic and steering arrangement.

[0021] In a further technical solution, an extension frame is installed outside the right-angle frame 2, the extension frame is bent, and guide wheel 2, steering wheel 1 and steering wheel 2 are arranged inside the extension frame, and guide wheel 2, steering wheel 1 and steering wheel 2 are all installed with a fixed frame and fixedly connected to the extension frame; steering wheel 1 and steering wheel 2 are suitable for steering the traction rope.

[0022] A construction method for rapid on-site assembly of steel box girder segments comprises the following steps:

[0023] Step 1: Prefabricate steel box beam segments in the prefabrication beam yard. After the pre-assembly is qualified, the beam segments are numbered and marked, and the beam segments are transported to the construction destination;

[0024] Step 2: Install temporary piers below the steel box girder segment position, and install and fix temporary pier jacks on the top of the temporary piers;

[0025] Step 3: First, install the bridge support on the pier cap beam, and install the upper truss in the middle of the support. The top elevation of the upper truss is the same as the support elevation. Then, set up the lower truss in the middle of the upper truss, and install the slideway on the top of the sinking truss.

[0026] The position of the upper truss and the slideway is adjusted by the jack on the temporary pier, and the beam transport device is installed on the slideway. The top elevation of the beam transport device is adjusted to be higher than the top height of the upper truss by the beam transport jack;

[0027] Then, a reverse pulling device is fixed on the front pier, and the pulling ropes of the reverse pulling device are respectively laid out on the outsides of the two slideways and connected to the beam transport device;

[0028] Step 4: Then pre-press the upper truss to verify the structural stability, and adjust the elevation of the upper truss and slideway through the jack on the temporary pier;

[0029] Step 5: The beam transport device is positioned behind the upper truss, and then the corresponding steel box girder segment is hoisted onto the beam transport device. After the steel box girder segment is transported to the designed position through the reverse pulling device, the beam transport device includes a beam transport jack, and the beam transport jack is lowered to make the steel box girder segment move to the upper truss and be fixed, and the beam transport device returns to the initial position;

[0030] Step 6: Continue to transport the rear section of the beam to the rear end of the front section of the beam, and then assemble and weld it with the front section of the steel box beam segment;

[0031] Step 7: Repeat steps 5 and 6 until the steel box girder of the entire bridge is installed.

[0032] Beneficial Effects

[0033] (1) The present invention can realize the rapid positioning and installation of the steel box girder segments by pre-adjusting the positions of the steel box girder segments through the trusses and the limiting devices arranged on the slideways, thereby greatly improving the installation efficiency and preventing the collision between the front and rear segment beams, thereby ensuring the safety of the construction.

[0034] By setting up a beam transport device on the slideway and transporting the beam body through the reverse pulling device, the installation of the steel box beam at the far end can be achieved first, and the construction difficulties caused by complex construction environment and site conditions can be solved. At the same time, the working environment of the crane can be improved and the construction time of the crane can be reduced.

[0035] (2) The present invention realizes the reciprocating operation of the traction rope by providing a traction rope passing through the traction disk, the transition wheel of the limit hook frame, the guide wheel 1, the guide wheel 2, the steering wheel 1 and the steering wheel 2 and returning to the traction disk, thereby driving the beam transport device forward or backward and realizing stable transportation of the beam transport device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a schematic diagram of the on-site structure plane of the present invention;

[0038] Figure 2 It is a horizontal elevation schematic diagram of the on-site structure of the present invention;

[0039] Figure 3 It is a side view of the limit hook frame of the slideway of the present invention;

[0040] Figure 4 is a schematic diagram of a slideway limiting device of the present invention;

[0041] Figure 5 It is another schematic diagram of the on-site structure plane of the present invention;

[0042] Figure 6 It is a side view of another limiting hook frame of the slideway of the present invention;

[0043] Figure 7 It is a partial schematic top view of the anti-pull traction device of the present invention;

[0044] Figure 8 It is a structural schematic diagram of a right angle frame 1 of the present invention;

[0045] Fig. 9 It is a structural schematic diagram of the right angle frame 2 of the present invention;

[0046] Fig.10 It is a side view of the right angle bracket 2 of the present invention when in use.

[0047] In the figure: 1. bridge pier; 2. bridge cap beam; 3. bridge support; 4. temporary pier; 41. temporary pier jack; 5. upper truss; 6. slideway; 61. limit hook frame; 62. limit device; 63. transition wheel; 7. beam transport device; 71. beam transport jack; 8. reverse pulling traction device; 81. traction rope; 82. traction machine; 83. traction disc; 84. right angle frame one; 85. right angle frame two; 86. guide wheel one; 87. guide wheel two; 88. steering wheel one; 89. steering wheel two; 810. extension frame; 9. lower truss. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The application principle of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] Example 1

[0051] See also Figure 1-4 As shown, an embodiment of the present invention provides a steel box girder segment on-site rapid assembly structure, including: a bridge pier 1, a bridge cap beam 2 is arranged on the bridge pier 1; an upper truss 5 is laid and installed on the bridge cap beam 2, a lower truss 9 is arranged in the middle of the upper truss 5, and the height of the lower truss 9 is lower than the height of the upper trusses 5 on both sides;

[0052] A temporary pier 4 is set up inside the lower truss 9, and a beam transport device 7 is installed on the temporary pier 4. The top height of the beam transport device 7 is higher than the height of the upper truss 5, and the height difference is 10-50cm;

[0053] The upper truss 5 is externally installed with a back-pull traction device 8 , and the end of the back-pull traction device 8 is installed with a slideway 6 , which is connected to the beam transport device 7 and the end of which is fixedly installed on the top of the upper truss 5 .

[0054] like Figure 1 As shown, two parallel slideways 6 are provided, and the ends are fixed to the top of the upper truss 5 by bolt connection. The beam transport device 7 is installed on the slideway 6, and the reverse pulling device 8 is installed on the bridge cap beam 2 located outside the upper truss 5;

[0055] The reverse pulling device includes a pulling rope 81, and a limiting hook frame 61 is installed outside the slideway 6. The pulling rope 81 passes through the limiting hook frame 61 outside the slideway 6 and is connected to the beam transport device 7, which is suitable for the pulling rope 81 to move along the direction of the bridge cap beam 2.

[0056] In a further technical solution, a steel box beam segment is installed on the beam transport device 7 of the slideway 6, and a limiting device 62 is provided at the position, one end of the limiting device 62 is rotatably connected to the slideway 6, and the top is suitable for abutting against the slideway 6.

[0057] The traction rope 81 on the reverse pulling device 8 is marked in sequence according to the length of the steel box girder segment, and multiple groups of steel box girder segments are provided; during reverse pulling, the operator controls the traction distance by the position of the mark passed on the traction rope.

[0058] A construction method for rapid on-site assembly of steel box girder segments comprises the following steps:

[0059] Step 1: Prefabricate steel box beam segments in the prefabrication beam yard. After the pre-assembly is qualified, the beam segments are numbered and marked, and the beam segments are transported to the construction destination;

[0060] Step 2: Install a temporary buttress 4 below the steel box girder segment position, and install and fix a temporary buttress jack 41 on the upper part of the temporary buttress;

[0061] Step 3: First, install the bridge support on the pier cap beam, and install the upper truss 5 in the middle of the support. The top elevation of the upper truss 5 is the same as the support elevation. Then, set up the lower truss 9 in the middle of the upper truss 5, and install the slideway 6 on the top of the sinking truss.

[0062] The positions of the upper truss 5 and the slideway 6 are adjusted by the jack on the temporary pier, and the beam transport device 7 is installed on the slideway 6. The top elevation of the beam transport device 7 is adjusted to be higher than the top elevation of the upper truss 5 by the beam transport jack 71;

[0063] Then, the reverse pulling device 8 is fixed on the front pier, and the reverse pulling device pulling rope 81 is respectively arranged on the outside of the two slideways and connected to the beam transport device 7;

[0064] Step 4: Then, the upper truss 5 is pre-stressed to verify the structural stability, and the elevation of the upper truss 5 and the slideway 6 is adjusted by the jack 41 on the temporary pier;

[0065] Step 5: The beam transport device 7 is positioned behind the upper truss 5, and then the corresponding steel box girder segment is hoisted onto the beam transport device 7. After the steel box girder segment is transported to the designed position through the reverse pulling device 9, the beam transport device 7 includes a beam transport jack, and the beam transport jack is lowered to make the steel box girder segment move to the upper truss 5 and be fixed, and the beam transport device 7 returns to the initial position;

[0066] Step 6: Continue to transport the rear section of the beam to the rear end of the front section of the beam, and then assemble and weld it with the front section of the steel box beam segment;

[0067] Step 7: Repeat steps 5 and 6 until the steel box girder of the entire bridge is installed.

[0068] Example 2

[0069] like Figure 5-10 As shown, it is another embodiment of the present invention. On the basis of Example 1, the reverse pulling traction device 8 includes a traction machine 82 and a traction plate 83. The traction is telescopically connected to the traction plate 83. The output end of the traction machine 82 is connected to the traction plate 83. The traction machine 82 is suitable for driving the traction plate 83 to rotate.

[0070] The upper trusses 5 on both sides of the lower trusses 9 are respectively installed with a right angle frame 1 84 and a right angle frame 2 85 , and guide wheels are installed in the right angle frame 1 84 and the right angle frame 2 85 , which are suitable for guiding the traction rope 81 .

[0071] A guide wheel 86 is installed in the right angle frame 84, and a transition wheel 63 is installed in the limit hook frame 61. A wheel frame is installed outside the transition wheel 63 and fixed in the limit hook frame 61, and the transition wheel 63 is installed on one side of the phase transport beam device 7; Figure 6 As shown, the transition wheel 63 is a concave wheel and is suitable for abutting the traction rope 81;

[0072] The guide wheel 86 is arranged parallel to the transition wheel 63 and is suitable for steering the traction telescopic wheel 81.

[0073] An extension frame 810 is installed outside the right-angle frame 85. The extension frame 810 is bent, and a guide wheel 87, a steering wheel 88 and a steering wheel 89 are arranged inside the extension frame 810. The guide wheel 87, the steering wheel 88 and the steering wheel 89 are all installed with a fixing frame and fixedly connected to the extension frame 86; the steering wheel 88 and the steering wheel 89 are suitable for steering the traction rope 81.

[0074] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steel box girder segmented rapid on-site assembly structure, characterized in that: include: A bridge pier (1), on which a bridge cap beam (2) is arranged; an upper truss (5) is laid and installed on the bridge cap beam (2), a lower truss (9) is arranged in the middle of the upper truss (5), and the height of the lower truss (9) is lower than the height of the upper trusses (5) on both sides; A temporary pier (4) is set up inside the lower truss (9), and a beam transport device (7) is installed on the temporary pier (4). The top height of the beam transport device (7) is higher than the height of the upper truss (5), and the height difference is 10-50 cm; The upper truss (5) is externally provided with a reverse pulling device (8), and a slideway (6) is installed at the end of the reverse pulling device (8); the slideway (6) is connected to the beam transport device (7) and the end thereof is fixedly installed on the top of the upper truss (5).

2. The steel box girder segmented on-site rapid assembly structure according to claim 1 is characterized in that: The slideways (6) are provided in two parallel positions, and the ends thereof are fixed to the top of the upper truss (5) by bolt connection.

3. The steel box girder segmented on-site rapid assembly structure according to claim 1 is characterized in that: The beam transport device (7) is installed on the slideway (6), and the reverse pulling device (8) is installed on the bridge cap beam (2) located outside the upper truss (5); The reverse pulling device comprises a pulling rope (81), a limiting hook frame (61) is installed outside the slideway (6), and the pulling rope (81) is connected to the beam transport device (7) after passing through the limiting hook frame (61) outside the slideway (6), so that the pulling rope (81) is suitable for moving along the direction of the bridge cap beam (2).

4. The steel box girder segmented on-site rapid assembly structure according to claim 3 is characterized in that: A steel box beam segment is installed on the beam transport device (7) of the slideway (6), and a limiting device (62) is arranged at the position, one end of the limiting device (62) is rotatably connected to the slideway (6), and the top is suitable for abutting against the slideway (6).

5. The steel box girder segmented on-site rapid assembly structure according to claim 3 is characterized in that: The traction rope (81) on the reverse pulling traction device (8) is marked in sequence according to the length of the steel box girder segment, and the steel box girder segment is provided with multiple groups; During reverse pulling, the operator controls the pulling distance by the marked position on the pulling rope.

6. The steel box girder segmented on-site rapid assembly structure according to claim 3 is characterized in that: The reverse pulling traction device (8) comprises a traction machine (82) and a traction disk (83), wherein the traction machine is telescopically connected to the traction disk (83), the output end of the traction machine (82) is connected to the traction disk (83), and the traction machine (82) is suitable for driving the traction disk (83) to rotate; The upper trusses (5) on both sides of the lower trusses (9) are respectively provided with a right angle frame 1 (84) and a right angle frame 2 (85), wherein the right angle frame 1 (84) and the right angle frame 2 (85) are both provided with guide wheels suitable for guiding the traction rope (81).

7. The steel box girder segmented rapid on-site assembly structure according to claim 6, characterized in that: A guide wheel (86) is installed in the right angle frame (84), and a transition wheel (63) is installed in the limit hook frame (61). A wheel frame is installed outside the transition wheel (63) and fixed in the limit hook frame (61), and the transition wheel (63) is installed on one side of the phase transport beam device (7); The transition wheel (63) is a concave wheel and is suitable for abutting against the traction rope (81); The guide wheel 1 (86) is arranged in parallel with the transition wheel (63) and is suitable for steering the traction telescopic (81).

8. The steel box girder segmented rapid on-site assembly structure according to claim 7, characterized in that: An extension frame (86) is installed outside the right-angle frame (85), and the extension frame (86) is bent. A guide wheel (87), a steering wheel (88) and a steering wheel (89) are arranged inside the extension frame (86). The guide wheel (87), the steering wheel (88) and the steering wheel (89) are all installed with a fixing frame and are fixedly connected to the extension frame (86); the steering wheel (88) and the steering wheel (89) are suitable for steering the traction rope (81).

9. A construction method for the on-site rapid assembly structure of steel box beam segments as claimed in claim 5, characterized in that: The following steps are involved: Step 1: Prefabricate steel box beam segments in the prefabrication beam yard. After the pre-assembly is qualified, the beam segments are numbered and marked, and the beam segments are transported to the construction destination; Step 2: Install a temporary buttress (4) below the steel box girder segment, and install a fixing jack (41) on the top of the temporary buttress; Step 3: First, install the bridge support on the bridge pier cap beam, and install the upper truss (5) in the middle of the support. The top elevation of the upper truss (5) is the same as the elevation of the support. Then, set up the lower truss (9) in the middle of the upper truss (5), and install the slideway (6) on the top of the sinking truss. The positions of the upper truss (5) and the slideway (6) are adjusted by using a jack on the temporary pier, a beam transport device (7) is installed on the slideway (6), and the top elevation of the beam transport device (7) is adjusted by using a jack (71) to be higher than the top elevation of the upper truss (5); Then, a reverse pulling device (8) is fixed on the front pier, and the reverse pulling device pulling rope (81) is respectively arranged on the outside of the two slideways and connected to the beam transport device (7); Step 4: Then, the upper truss (5) is pre-stressed to verify the structural stability, and the elevation of the upper truss (5) and the slideway (6) is adjusted by the jack (41) on the temporary pier; Step 5: The beam transport device (7) is positioned behind the upper truss (5), and then the corresponding steel box girder segment is hoisted onto the beam transport device (7). After the steel box girder segment is transported to the designed position by the reverse pulling device (9), the beam transport device (7) includes a beam transport jack, and the beam transport jack is lowered to allow the steel box girder segment to be fixed on the upper truss (5), and the beam transport device (7) returns to the initial position; Step 6: Continue to transport the rear section of the beam to the rear end of the front section of the beam, and then assemble and weld it with the front section of the steel box beam segment; Step 7: Repeat steps 5 and 6 until the steel box girder of the entire bridge is installed.

Images