Steel box girder segmented on-site rapid assembly structure and construction method

Abstract

The application discloses a kind of steel box girder segmented field fast assembling structure and construction method, it is related to steel box girder installation technical field;Including: bridge pier column, bridge bent cap is provided on bridge pier column;Upper truss is installed on bridge bent cap and is laid, lower truss is set in the middle of upper truss, the height of lower truss is lower than the height of upper truss on both sides;Temporary support pier is erected in lower truss, and beam conveying device is installed on temporary support pier, the height of the top of beam conveying device is higher than the height of upper truss, and the height difference is 10-50cm;Anti-pulling traction device is installed outside upper truss, and the end of anti-pulling traction device is installed with slide, and the end of slide is fixedly installed on the top of upper truss and is communicated with beam conveying device.The application solves the technical problems that the position of steel box girder is adjusted by the movement of hoist arm in the process of existing steel box girder hoisting, inconvenient operation and high difficulty of butt joint between steel box girders.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of steel box girder installation, and particularly relates to a steel box girder segmented on-site rapid assembly structure and a construction method. BACKGROUND

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

[0003] Steel box girders usually need to be manufactured by a qualified manufacturer using the whole jig frame and longitudinal segmentation method, 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 hoisting arm, which is inconvenient to operate, has high difficulty in butt joint between steel box girders, is low in efficiency, and the operation of the hoisting machine is also restricted by the geological conditions under the bridge and the surrounding structures.

[0004] Therefore, a steel box girder segmented on-site rapid assembly structure and a construction method as mentioned in the present application are needed. SUMMARY

[0005] The present application aims to provide a steel box girder segmented on-site rapid assembly structure and a construction method to solve the problems mentioned in the background art, which is excellent in quality, safe and reliable, economical and environmentally friendly, and can effectively ensure the installation precision and installation quality.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A steel box girder segmented on-site rapid assembly structure, comprising: a bridge pier column, a bridge bent cap is arranged on the bridge pier column; an upper truss is arranged on the bridge bent cap, 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 truss on both sides;

[0008] A temporary support pier is arranged in the lower truss, and a girder transporting device is arranged on the temporary support pier, wherein the top height of the girder transporting device is higher than the height of the upper truss, and the height difference is 10-50 cm;

[0009] A counter-pulling traction device is arranged outside the upper truss, and a slide is arranged at the end of the counter-pulling traction device, wherein the slide is connected with the girder transporting device and is fixedly arranged at the top of the upper truss.

[0010] In a further technical solution, the slide is provided with two parallel slides, and the ends are fixedly connected to the top of the upper truss by bolts.

[0011] In a further technical solution, the beam transporting device is installed on the slide, and the counter-pulling traction device is installed on the bridge bent cap outside the upper truss.

[0012] The counter-pulling traction device comprises a traction rope, a limiting hook frame is installed outside the slide, the traction rope is connected with the beam transporting device after passing through the limiting hook frame outside the slide, and the traction rope is adapted to move along the direction of the bridge bent cap.

[0013] In a further technical solution, the beam transporting device of the slide is installed with a steel box girder segment, and the slide is provided with a limiting device, one end of the limiting device is rotationally connected with the slide, and the top is adapted to abut against the slide.

[0014] In a further technical solution, the traction rope on the counter-pulling traction device is sequentially provided with an identification according to the length of the steel box girder segment, and the steel box girder segment is provided with multiple groups.

[0015] When counter-pulling, the operator controls the pulling distance through the identification position provided on the traction rope.

[0016] In a further technical solution, the counter-pulling traction device comprises a traction machine and a traction disc, the traction rope is connected with the traction disc, the output end of the traction machine is connected with the traction disc, and the traction machine is adapted to drive the traction disc to rotate.

[0017] The upper truss on both sides of the lower truss is respectively provided with a right-angle frame one and a right-angle frame two, the right-angle frame one and the right-angle frame two are both provided with a guide wheel inside, and the guide wheel is adapted to guide the traction rope.

[0018] In a further technical solution, the right-angle frame one is provided with a guide wheel one inside, and a transition wheel is installed in the limiting hook frame, a wheel frame is installed outside the transition wheel and fixed in the limiting hook frame, and the transition wheel is installed on one side of the beam transporting device.

[0019] The transition wheel is a concave wheel, and is adapted to abut against the traction rope.

[0020] The guide wheel one and the transition wheel are arranged in parallel, and are adapted to divert the traction rope.

[0021] In a further technical solution, the right-angle frame two is provided with an extension frame outside, the extension frame is in a bent shape, and the extension frame is provided with a guide wheel two, a diverting wheel one and a diverting wheel two inside, the guide wheel two, the diverting wheel one and the diverting wheel two are both provided with a fixing frame and fixedly connected with the extension frame; the diverting wheel one and the diverting wheel two are adapted to divert the traction rope.

[0022] A construction method for on-site rapid assembly of a steel box girder segment, comprising the following steps:

[0023] Step 1: segment precast steel box girder segment in precast beam field, pre-assemble qualified, mark the beam segment with number, and transport the beam segment to the construction destination;

[0024] Step 2: install temporary support pier under the position of steel box girder segment, and install fixed temporary support pier jack on the upper part of the temporary support pier;

[0025] Step 3: first, install bridge support on the pier cap beam, and install upper truss in the middle of the support, the top elevation of the upper truss is the same as the elevation of the support, then set up lower truss in the middle of the upper truss, and install slide on the top of the lower truss;

[0026] Adjust the position of the upper truss and the slide through the jack on the temporary support pier, install the beam transporting device on the slide, and adjust the height of the top of the beam transporting device through the beam jack to be higher than the height of the top of the upper truss;

[0027] Then, fix the counter-pulling traction device on the front pier column, and arrange the traction ropes of the counter-pulling device on the outer sides of the two slides and connect them with the beam transporting device;

[0028] Step 4: then, pre-press the upper truss, verify the stability of the structure, and adjust the elevation of the upper truss and the slide through the jack on the temporary support pier;

[0029] Step 5: the beam transporting device is positioned behind the upper truss, then the corresponding steel box girder segment is hoisted to the beam transporting device, the steel box girder segment is transported to the designed position through the counter-pulling traction device, the beam transporting device includes the beam jack, the beam jack falls down, the steel box girder segment falls onto the upper truss and is fixed, and the beam transporting device returns to the initial position;

[0030] Step 6: continue to transport the next beam segment to the rear end of the previous beam segment, and assemble and weld the previous steel box girder segment;

[0031] Step 7: repeat steps 5 and 6 until the installation of the steel box girder of the whole bridge is completed.

[0032] Beneficial effects

[0033] (1) The steel box girder segment can be quickly positioned and installed through the pre-adjustment of the position of the steel box girder segment by the truss and the limiting device arranged on the slide, the installation efficiency is greatly improved, the collision between the front and rear segments is prevented, and the safety of the construction is ensured.

[0034] The beam body can be transported through the counter-pulling traction device by arranging the beam transporting device on the slide, the installation of the steel box girder at the far end can be realized in priority, the construction problems caused by the complex construction environment and site conditions can be solved, the working environment of the crane can be improved, and the construction time of the crane can be reduced.

[0035] (2) The present invention achieves the reciprocating operation of the traction rope by setting the traction rope through the traction disc, the transition wheel of the limiting hook frame, the guide wheel one, the guide wheel two, the steering wheel one and the steering wheel two back to the traction disc, thereby realizing the forward or backward movement of the beam transporting device and realizing the stable transportation of the beam transporting device. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

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

[0039] Figure 3 This is a side view of the limiting hook frame of the slide rail of the present invention;

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

[0041] Figure 5 This is a schematic diagram of another on-site structure according to the present invention;

[0042] Figure 6 This is a side view of another limiting hook frame for the slide rail of the present invention;

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

[0044] Figure 8 This is a schematic diagram of the right-angle frame of the present invention;

[0045] Figure 9 This is a schematic diagram of the structure of the right-angle frame II of the present invention;

[0046] Figure 10 This is a side view of the right-angle bracket II of the present invention in use.

[0047] In the diagram: 1. Bridge pier; 2. Bridge cap beam; 3. Bridge bearing; 4. Temporary support pier; 41. Temporary support pier jack; 5. Upper truss; 6. Slide rail; 61. Limiting hook frame; 62. Limiting device; 63. Transition wheel; 7. Beam transport device; 71. Beam transport jack; 8. Reverse 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 Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0049] The application principle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0050] Example 1

[0051] Please see Figures 1-4 As shown, this is one embodiment of the present invention, which provides a rapid on-site assembly structure for steel box girder segments, including: a bridge pier 1, a bridge cap beam 2 provided on the bridge pier 1; an upper truss 5 laid and installed on the bridge cap beam 2, and a lower truss 9 provided in the middle of the upper truss 5, the height of the lower truss 9 being lower than the height of the upper trusses 5 on both sides.

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

[0053] The upper truss 5 is equipped with a reverse tension traction device 8, and the end of the reverse tension traction device 8 is equipped with a slide rail 6. The slide rail 6 is connected to the beam transport device 7 and its end is fixedly installed on the top of the upper truss 5.

[0054] like Figure 1 As shown, the slide rail 6 has two parallel sections, and its ends are fixed to the top of the upper truss 5 by bolts. The beam transport device 7 is installed on the slide rail 6, and the anti-pull traction device 8 is installed on the bridge cap beam 2 located outside the upper truss 5.

[0055] The anti-pull traction device includes a traction rope 81 and a limiting hook 61 installed outside the slide 6. After the traction rope 81 passes through the limiting hook 61 outside the slide 6, it is connected to the beam transport device 7, which is suitable for the traction rope 81 to move along the direction of the bridge cap beam 2.

[0056] In a further technical solution, the beam transporting device 7 of the slide 6 is installed with a steel box girder segment, and the slide 6 is provided with a limiting device 62, one end of the limiting device 62 is rotatably connected with the slide 6, and the top is adapted to abut on the slide 6.

[0057] The traction rope 81 on the counter-pulling traction device 8 is sequentially provided with an identification according to the length of the steel box girder segment, and the steel box girder segment is provided with multiple groups; during counter-pulling traction, the operator controls the traction distance through the identification position provided on the traction rope.

[0058] A construction method for on-site rapid assembly of a steel box girder segment, comprising the following steps:

[0059] Step 1: pre-assemble the steel box girder segment at the precast beam yard, mark the beam segment after pre-assembly, and transport the beam segment to the construction destination;

[0060] Step 2: install temporary buttress 4 under the position of the steel box girder segment, and install fixed 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 elevation of the support, then set the lower truss 9 on the upper truss 5, and install the slide 6 on the top of the lower truss;

[0062] Adjust the position of the upper truss 5 and the slide 6 through the jack on the temporary buttress, install the beam transporting device 7 on the slide 6, and adjust the height of the top of the beam transporting device 7 through the beam transporting jack 71 to be higher than the top height of the upper truss 5;

[0063] Then, fix the counter-pulling traction device 8 on the front pier column, and simultaneously arrange the counter-pulling device traction rope 81 on the outer side of the two slides and connect it with the beam transporting device 7;

[0064] Step 4: then, pre-press the upper truss 5, verify the structural stability, and adjust the elevation of the upper truss 5 and the slide 6 through the jack 41 on the temporary buttress;

[0065] Step 5: position the beam transporting device 7 behind the upper truss 5, then hoist the corresponding steel box girder segment to the beam transporting device 7, transport the steel box girder segment to the designed position through the counter-pulling traction device 8, the beam transporting device 7 includes a beam transporting jack, the beam transporting jack falls down, so that the steel box girder segment falls onto the upper truss 5 to be fixed, and the beam transporting device 7 returns to the initial position;

[0066] Step 6: continue to transport the next beam to the rear end of the previous beam, and assemble and weld with the previous steel box girder segment;

[0067] Step 7: repeat steps 5 and 6 until the installation of the steel box girder of the whole bridge is completed.

[0068] Embodiment 2

[0069] As Figures 5-10 shown, another embodiment of the present application is based on embodiment 1, the counter-pulling traction device 8 comprises a traction machine 82 and a traction disc 83, the traction rope is connected to the traction disc 83, the output end of the traction machine 82 is connected to the traction disc 83, and the traction machine 82 is adapted to drive the traction disc 83 to rotate.

[0070] The upper truss 5 on both sides of the lower truss 9 is respectively provided with a right-angle frame one 84 and a right-angle frame two 85, the right-angle frame one 84 and the right-angle frame two 85 are both provided with a guide wheel, which is adapted to guide the traction rope 81.

[0071] The right-angle frame one 84 is provided with a guide wheel one 86, and the transition wheel 63 is provided in the limiting hook frame 61, the transition wheel 63 is provided with a wheel frame and fixed in the limiting hook frame 61, and the transition wheel 63 is provided on one side of the beam transporting device 7; as Figure 6 shown, the transition wheel 63 is a concave wheel, and is adapted to abut against the traction rope 81.

[0072] The guide wheel one 86 is parallel to the transition wheel 63, and is adapted to divert the traction rope 81.

[0073] The right-angle frame two 85 is provided with an extension frame 810, the extension frame 810 is in a bent shape, and the extension frame 810 is provided with a guide wheel two 87, a diverting wheel one 88 and a diverting wheel two 89, the guide wheel two 87, the diverting wheel one 88 and the diverting wheel two 89 are both provided with a fixing frame and fixedly connected to the extension frame 810; the diverting wheel one 88 and the diverting wheel two 89 are adapted to divert the traction rope 81.

[0074] It is obvious to those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0075] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A steel box girder segmented field rapid assembly structure, characterized in that, The utility model relates to a bridge pier column (1) is provided with bridge bent cap (2) on bridge pier column (1), and the upper truss (5) is installed on bridge bent cap (2) and is provided with lower truss (9) in the middle part of upper truss (5), and the height of lower truss (9) is lower than the height of two side upper trusses (5); The temporary support pier (4) is set up in lower truss (9), and the girder conveying device (7) is installed on temporary support pier (4), and the top height of girder conveying device (7) is higher than the height of upper truss (5), and the height difference is 10-50cm; The reverse pulling traction device (8) is installed outside upper truss (5), and the end of reverse pulling traction device (8) is installed with slide (6), and slide (6) is communicated with girder conveying device (7) and is fixedly installed at the top of upper truss (5); The girder conveying device (7) is installed on slide (6), and the reverse pulling traction device (8) is installed on bridge bent cap (2) outside upper truss (5); The reverse pulling traction device includes traction rope (81), and the limiting hook frame (61) is installed outside slide (6), and traction rope (81) is connected with girder conveying device (7) after passing through limiting hook frame (61) outside slide (6), and traction rope (81) is suitable for moving along the direction of bridge bent cap (2); The reverse pulling traction device (8) includes traction machine (82) and traction disc (83), and traction rope (81) is connected on traction disc (83), and the output end of traction machine (82) is connected with traction disc (83), and traction machine (82) is suitable for driving traction disc (83) to rotate; The right angle frame one (84) and right angle frame two (85) are installed on the two sides of upper truss (5) of lower truss (9) respectively, and the guide wheel is installed in right angle frame one (84) and right angle frame two (85), and traction rope (81) is guided; The guide wheel one (86) is installed in right angle frame one (84), and the transition wheel (63) is installed in limiting hook frame (61), the wheel frame is installed outside transition wheel (63) and is fixed in limiting hook frame (61), and the transition wheel (63) is installed on one side of girder conveying device (7); The transition wheel (63) is concave, and is suitable for abutting traction rope (81); The guide wheel one (86) is parallelly arranged with transition wheel (63), and is suitable for turning traction rope (81); The extension frame (810) is installed outside right angle frame two (85), the extension frame (810) is bended, and the guide wheel two (87), turning wheel one (88) and turning wheel two (89) are arranged in extension frame (810), the fixed frame is installed on guide wheel two (87), turning wheel one (88) and turning wheel two (89), and guide wheel two (87), turning wheel one (88) and turning wheel two (89) are fixedly connected with extension frame (810), and turning wheel one (88) and turning wheel two (89) are suitable for turning traction rope (81). Slide (6) is provided with two parallel and is fixedly connected at the top of upper truss (5) through bolt connection.

2. The steel box girder segmented and rapidly assembled structure on site according to claim 1, characterized in that, ​ 3. The steel box girder segmented and rapidly assembled in situ structure according to claim 2, characterized in that, The steel box girder section is installed on the beam transporting device (7) of the slide (6), and the slide (6) is provided with a limiting device (62), one end of the limiting device (62) is rotatably connected with the slide (6), and the top is adapted to abut on the slide (6).

4. The steel box girder segmented and rapidly assembled structure on site according to claim 3, characterized in that, The traction rope (81) on the counter-pulling traction device (8) is sequentially provided with marks according to the length of the steel box girder section, and the steel box girder section is provided with multiple groups. During counter-pulling traction, the operator controls the traction distance through the mark position provided on the traction rope (81).

5. The construction method of the steel box girder segmented field rapid assembly structure according to claim 4, characterized in that, The method comprises the following steps: Step 1: prefabricate the steel box girder section at the prefabricated beam field, mark the beam section after pre-assembling, and transport the beam section to the construction destination; Step 2: install temporary buttress (4) under the position of the steel box girder section, and install fixed jack (41) on the upper part of the temporary buttress; 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 elevation of the support, then set the lower truss (9) in the middle of the upper truss (5), and install the slide (6) on the top of the sinking truss; Adjust the position of the upper truss (5) and the slide (6) through the jacks on the temporary buttress, install the beam transporting device (7) on the slide (6), and adjust the height of the top of the beam transporting device (7) through the jack (71) to be higher than the height of the top of the upper truss (5); Then, fix the counter-pulling traction device (8) on the front pier column, and simultaneously arrange the traction rope (81) of the counter-pulling device on the outer side of the two slides and connect it with the beam transporting device (7); Step 4: then, pre-press the upper truss (5), verify the structural stability, and adjust the elevation of the upper truss (5) and the slide (6) through the jacks (41) on the temporary buttress; Step 5: the beam transporting device (7) is positioned behind the upper truss (5), then the corresponding steel box girder section is hoisted to the beam transporting device (7), the steel box girder section is transported to the designed position through the counter-pulling traction device (8), the beam transporting device (7) includes a beam transporting jack, the beam transporting jack falls, the steel box girder section falls on the upper truss (5) and is fixed, and the beam transporting device (7) returns to the initial position; Step 6: continue to transport the next beam to the rear end of the previous beam, and assemble and weld the previous steel box girder section; Step 7: repeat steps 5 and 6 until the installation of the whole bridge steel box girder is completed.

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