CN220908153U - Bridge precast beam hoisting point conversion equipment - Google Patents
Bridge precast beam hoisting point conversion equipment Download PDFInfo
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- CN220908153U CN220908153U CN202321931797.8U CN202321931797U CN220908153U CN 220908153 U CN220908153 U CN 220908153U CN 202321931797 U CN202321931797 U CN 202321931797U CN 220908153 U CN220908153 U CN 220908153U
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a bridge precast beam lifting point conversion device which comprises a rigid cross rod, a triangular flange plate, first lifting ropes, second lifting ropes, third lifting ropes and fourth lifting ropes, wherein one side of each of two ends of the rigid cross rod is connected with one side of each of the first lifting ropes, the other sides of the two first lifting ropes are connected with the triangular flange plate to form a flexible triangle, the other sides of the two ends of the rigid cross rod are respectively connected with the second lifting ropes and the third lifting ropes, and the triangular flange plate is outwards connected with the fourth lifting ropes. The rigid cross rod is adopted, so that a certain safety distance is kept between two lifting points of the lifting point conversion device, and the mutual interference of steel cables of the crane can be avoided; the assembly on site is convenient, the weight is light, and the transportation is convenient; the workload of site construction preparation and debugging is effectively reduced, and the traffic pressure of equipment-free transportation is reduced; even if the field around the bridge is limited, the double-truck lifting crane can be adopted, so that the requirement on the crane is reduced, and the applicability is strong.
Description
Technical Field
The utility model relates to the field of bridge engineering, in particular to a bridge precast beam hanging point conversion device.
Background
Bridge prefabrication beam erection methods are common, such as a bridge girder erection machine method, a girder guiding method, a floating crane method, a steam crane method and the like. Compared with other methods, the steam-hanging method has the characteristics of flexibility and high efficiency, and the method is used in projects with small precast beam erection scale, can effectively save equipment erection and debugging time, and can also avoid traffic problems of equipment transportation.
However, the steam-lifting method is limited by lifting capacity, so that strict requirements are placed on working sites and working radiuses, and a crane is often arranged near a span range of a bridge to be installed during lifting construction, so that the lifting position of the precast beam is overlapped with the working range of the crane to the greatest extent. In some middle-sized bridges crossing rivers or obstacles, the construction site under the bridge is limited, the crane can only work at two ends of the bridge span to be installed, and compared with the scheme that the crane is arranged near the range of the bridge span to be installed, the prefabricated beams with the same span are installed, and the crane can be installed only by more than twice the hoisting capacity of the original crane. Even if the two sides of the bridge span to be installed are simultaneously provided with the cranes in a double-truck lifting mode, the lifting points cannot be converted in the lifting process, and the limitation that the installation of the lifting points is completed before the lifting is required, one of the working radiuses of the cranes is required to cover the whole span. Under the condition that the requirement on the hoisting capacity of the crane is high, the matched crane cannot be easily found, and other methods such as a bridge girder erection machine, a guide girder and the like can be adopted, so that the construction period and the cost of the precast girder with smaller erection scale are increased.
Therefore, how to realize the double-truck lifting method under the precondition of ensuring safety, high efficiency and economy and under the condition of limited construction sites, fully utilizing the lifting capacity of the cranes and realizing the stable and safe conversion of lifting points among the cranes becomes a problem to be solved by the technicians in the field.
Based on the above situation, the utility model provides a bridge precast beam lifting point conversion device and a precast beam lifting method thereof, so as to effectively solve the problems.
Disclosure of Invention
In order to solve the problems in the background art, the utility model provides a bridge precast beam lifting point conversion device and a precast beam lifting method thereof.
The utility model adopts the following technical scheme:
The utility model provides a bridge precast beam hoisting point conversion equipment, includes rigidity horizontal pole, triangle ring flange, first lifting rope, second lifting rope, third lifting rope and fourth lifting rope, one side at rigidity horizontal pole both ends is connected a first lifting rope one side respectively, and the opposite side and the triangle ring flange of two first lifting ropes are connected and are formed flexible triangle, second lifting rope and third lifting rope are connected respectively to the opposite side at rigidity horizontal pole both ends, and the triangle ring flange is towards outside still connecting fourth lifting rope.
Further, the rigid cross rod is connected with the two first lifting ropes, the second lifting ropes and the third lifting ropes through lifting lugs, and the triangular flange plate is connected with the two first lifting ropes and the four lifting ropes through lifting lugs.
Further, the safety coefficient of the bearing capacity of the first lifting rope, the second lifting rope, the third lifting rope and the fourth lifting rope is not smaller than 6.
Further, the rigid cross rod comprises a steel pipe with a rectangular section and an ear plate, and two ends of the steel pipe with the rectangular section are connected with the ear plate.
Further, the section of the rectangular section steel pipe is of a closed rectangular structure, and the lug plates are positioned on the symmetrical central line of the section of the rectangular section steel pipe.
Furthermore, the lug plates extend into the rectangular section steel pipe along the symmetrical center line of the rectangular section steel pipe section to be welded with the rectangular section steel pipe, two hanging holes are formed in each lug plate according to the size of the lifting lug, and the periphery of each hanging hole is reinforced by welding a circular ring steel plate.
Further, one hanging hole of the lug plate is connected with the crane through the second hanging rope, the third hanging rope and the lifting lug, and the other hanging hole is connected with the triangular flange plate through the first hanging rope and the lifting lug.
Further, the triangular flange plate is an equilateral triangle, and three hanging holes are formed in the vertex angle of the triangular flange plate according to the size of the lifting lug.
Further, two hanging holes in the triangular flange plate are connected with the lug plate of the rigid cross rod through a first hanging rope and a lifting lug, and the remaining hanging hole is connected with the precast beam through a fourth hanging rope and a lifting lug.
Further, the precast beam hoisting method adopting the bridge precast beam hoisting point conversion device comprises the following construction steps:
Step one, selecting one end of a bridge span to be hoisted as a beam feeding end according to beam transportation traffic and site conditions;
Step two, arranging a beam feeding end hanging beam crane and a beam transporting gun car with self-running capability on a bridge deck or a road which is already constructed at a beam feeding end of a bridge span to be hoisted, arranging a beam feeding crane according to requirements, and arranging a non-beam feeding end hanging beam crane on a bridge deck or a road which is already constructed at a non-beam feeding end;
Assembling a hanging point conversion device, namely connecting a fourth hanging rope of the hanging point conversion device with one end of the precast beam, which is close to a bridge span to be hoisted, through a lifting lug after the precast beam is transported to a bridge deck or a road at a beam feeding end by a hanging vehicle, and directly installing the hanging rope at the other end of the precast beam;
Step four, connecting a beam feeding end lifting beam crane with a third lifting rope, connecting the beam feeding crane with the lifting rope at the other end of the precast beam through a lifting lug, lifting the precast beam away from a trailer, transferring the precast beam to a beam transporting gun carriage, lowering the precast beam by the beam feeding crane to support the precast beam on the beam transporting gun carriage, and separating the beam feeding crane from the lifting rope, wherein the beam end with a lifting point conversion device is at one side close to a bridge span to be lifted;
Step five, a beam transporting gun carriage moves towards a bridge span to be hoisted, a boom of a beam feeding end crane follows, when the end part of a precast beam moves to the edge of the bridge span to be hoisted, a non-beam feeding end crane is connected to a second lifting rope, but a lifting point is kept from being stressed, at the moment, the angle and the length of the boom of the beam feeding end crane are kept within a designed working range, and the non-beam feeding end crane is not limited by the working range;
Step six, continuously moving the beam transporting gun carriage, wherein the beam transporting gun carriage is driven to a half of the precast beam to suspend, or the angle and the length of the boom of the beam feeding side crane are close to the critical working range, or the boom of the beam feeding side crane is shortened and the lifting angle is shortened to enter the working range, and the non-beam feeding end crane starts to lift the second lifting rope until the third lifting rope of the beam feeding end crane is loosened;
Step seven, keeping the working states of the beam transporting gun carriage and the non-beam feeding end crane motionless, separating the beam feeding end crane from the third lifting rope, connecting the beam feeding end crane with the precast beam transporting gun carriage end lifting rope, lifting the lifting point by the beam feeding end crane, and driving away from the beam transporting gun carriage after the precast beam is separated from the beam transporting gun carriage;
Step eight, the non-beam feeding end hanging beam crane and the beam feeding end hanging beam crane work cooperatively, after the precast beam is put into a bridge span, a fourth hanging rope is separated from the precast beam, the non-beam feeding end hanging beam crane sends a hanging point conversion device to a bridge deck or an area where the beam feeding end is constructed, and the hanging rope at the other end of the precast beam is manually removed;
and step nine, repeating the above operation to finish the erection of the residual precast beams.
The utility model provides a bridge precast beam lifting point conversion device and a precast beam lifting method thereof, wherein the precast beam lifting point conversion device comprises the following steps:
1. The rigid cross rod is adopted, when the conversion device works, the cross rod is in a nearly horizontal posture after being stressed, so that a certain safety distance is ensured between two hanging points of the hanging point conversion device, and the mutual interference of steel cables of a crane can be avoided;
2. The device is composed of flexible suspenders except the cross rod, is convenient to assemble on site, has light weight and is convenient to transport;
3. The transfer device has definite force transfer, no larger internal force is generated in the device when the lifting points are switched, and the load transfer degree between the lifting machines can be directly determined through observation on the lifting beam site;
4. in the engineering with smaller construction scale of the precast beam, the workload of site construction preparation and debugging is effectively reduced, the traffic pressure of equipment transportation is avoided, the working efficiency is improved, and the construction cost is saved;
5. In the engineering with smaller prefabricated beam erection scale, equipment arrangement and hoisting construction are only needed on the constructed road or bridge, even if the field around the bridge is limited, double-truck hoisting can be adopted, so that the requirement on a crane is reduced, and the applicability is strong.
Drawings
FIG. 1 is a schematic diagram of a precast beam hanging point conversion device according to the present utility model;
FIG. 2 is a schematic elevation view of a rigid rail;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
Fig. 4 is a layout of a precast beam hoisting construction machine.
The sequence numbers marked in the figures are represented as follows: 1-first lifting ropes, 2-lifting lugs, 3-rigid cross bars, 4-triangular flange plates, 5-second lifting ropes, 6-third lifting ropes, 7-fourth lifting ropes, 8-non-beam-feeding end construction bridge decks or roads, 9-bridge spans to be lifted, 10-beam-feeding end construction bridge decks or roads, 11-beam-transporting gun trucks, 12-trailers, 13-non-beam-feeding end lifting beam cranes, 14-beam-feeding end lifting beam cranes, 15-beam-feeding cranes, 31-rectangular section steel pipes, 32-lug plates and 33-ring steel plates.
Detailed Description
The utility model is further described below with reference to the embodiments shown in the drawings, but the utility model is not limited to the specific constructions and applications shown and described below, so that all possible modifications and equivalents that may be used are intended to be included within the scope of the utility model.
Referring to fig. 1-3, a bridge precast beam lifting point conversion device comprises a rigid cross rod 3, a triangular flange 4, a first lifting rope 1, a second lifting rope 5, a third lifting rope 6 and a fourth lifting rope 7, wherein one side of each of two ends of the rigid cross rod 3 is connected with one side of the first lifting rope 1, the other sides of the two first lifting ropes 1 are connected with the triangular flange 4 to form a flexible triangle, the other sides of the two ends of the rigid cross rod 3 are respectively connected with the second lifting rope 5 and the third lifting rope 6, and the triangular flange 4 is further connected with the fourth lifting rope 7 towards the outer side.
The rigid cross rod 3 is connected with the two first lifting ropes 1, the second lifting rope 5 and the third lifting rope 6 through lifting lugs 2, and the triangular flange 4 is connected with the two first lifting ropes 1 and the four lifting ropes 7 through lifting lugs 2.
The bearing capacity of the first lifting rope 1, the second lifting rope 5, the third lifting rope 6 and the fourth lifting rope 7 is not less than 300 tons.
The rigid cross rod 3 comprises a rectangular section steel pipe 31 and an ear plate 32, and two ends of the rectangular section steel pipe 31 are connected with the ear plate 32. The rigid cross rod 3 is prefabricated by Q345 steel, the whole length of the rectangular section steel pipe 31 is 2.5m, the wall thickness is 10mm, and the section is a welded closed rectangular structure with 20cm multiplied by 20 cm.
The ear plate 32 is formed in an L-shape by using a plate member having a thickness of 20mm, a length of 55cm and a width of 40 cm.
The section of the rectangular section steel pipe 31 is of a closed rectangular structure, and the lug plates 32 are positioned on the symmetrical central line of the section of the rectangular section steel pipe 31.
The lug plates 32 extend into the rectangular section steel pipe 31 along the symmetrical center line of the section of the rectangular section steel pipe 31 to be welded with the rectangular section steel pipe 31, the length of the lug plates extends to 25cm, two hanging holes are formed in each lug plate 32 according to the size of the lifting lug 2, and the periphery of each hanging hole is welded and reinforced by adopting a circular ring steel plate 33. Preferably, the periphery of the hanging hole is welded and reinforced by a circular steel plate 33 with the inner diameter of 8cm, the outer diameter of 16cm and the thickness of 10 mm.
One hanging hole of the lug plate 32 is connected with the crane through the second hanging rope 5, the third hanging rope 6 and the lifting lug 2, and the other hanging hole is connected with the triangular flange 4 through the first hanging rope 1 and the lifting lug 2.
The triangular flange 4 is preferably made of Q345 steel plates, has the thickness of 4cm, is an equilateral triangle and has the side length of 40cm, and three hanging holes which are directly 8mm are formed in the vertex angle of the triangular flange 4 according to the size of the lifting lug 2.
Two lifting holes in the triangular flange plate 4 are connected with the lug plate 32 of the rigid cross rod 3 through the first lifting rope 1 and the lifting lug 2, and the rest lifting hole is connected with the precast beam through the fourth lifting rope 7 and the lifting lug 2.
Referring to fig. 1-3, the method for hoisting the precast beam by adopting the precast beam hoisting point conversion device for the bridge comprises the following construction steps:
Step one, selecting one end of a bridge span 9 to be hoisted as a beam feeding end according to beam transportation traffic and site conditions;
step two, arranging a beam feeding end hanging beam crane 14 and a beam transporting gun carriage 11 with self-running capacity on a bridge deck or a road 10 which is to be hung at the beam feeding end of the bridge span 9, arranging a beam feeding crane 15 according to the requirement, wherein the maximum bearing capacity is 400 tons, and arranging a non-beam feeding end hanging beam crane 13 on a non-beam feeding end bridge deck or a road 8, wherein the maximum bearing capacity is 600 tons;
step three, splicing the hoisting point conversion device, namely after the precast beam is transported to a bridge deck or a road 10 which is constructed at the beam feeding end by a trailer 12, connecting a fourth hoisting rope 7 of the hoisting point conversion device with one end of the precast beam, which is close to a bridge span 9 to be hoisted, through a lifting lug, and directly installing the hoisting rope at the other end;
Step four, connecting a beam feeding end lifting beam crane 14 with a third lifting rope 6, connecting a beam feeding crane 15 with the lifting rope at the other end of the precast beam through a lifting lug, lifting the precast beam away from a trailer 12, transferring the precast beam to a beam transporting gun carriage 11, lowering the precast beam by the beam feeding crane 15 to support the precast beam to the beam transporting gun carriage 11, and separating the beam feeding crane 15 from the lifting rope, wherein the beam end with a lifting point conversion device is at one side close to a bridge span 9 to be lifted;
Step five, a beam transporting gun carriage 11 moves towards a bridge span 9 to be hoisted, a boom of a beam feeding end crane 14 follows, when the end part of a precast beam moves to the edge of the bridge span 9 to be hoisted, a non-beam feeding end crane 13 is connected to a second lifting rope 5, but a lifting point is kept from being stressed, at the moment, the angle and the length of the boom of the beam feeding end crane 14 are kept within a designed working range, and the non-beam feeding end crane 13 is not limited by the working range;
Step six, continuously moving the beam transporting gun carriage 11, wherein the beam transporting gun carriage 11 is driven to a half of the precast beam to be suspended, or the angle and the length of a boom of the feeding Liang Ce crane 14 are close to a critical working range, or the boom of the feeding Liang Ce crane 13 is shortened and lifted to enter the working range by an angle which is far away from the boom side crane 13, and the non-beam feeding end crane 13 starts to lift the second lifting rope 5 until the third lifting rope 6 of the beam feeding end crane 14 is loosened;
Step seven, keeping the working states of the beam transporting gun carriage 11 and the non-beam feeding end crane 13 motionless, separating the beam feeding end crane 14 from the third lifting rope 6, connecting the beam feeding end crane 14 with the lifting rope at the end of the precast beam transporting gun carriage 11, lifting a lifting point by the beam feeding end crane 14, and driving away the beam transporting gun carriage 11 after the precast beam is separated from the beam transporting gun carriage 11;
Step eight, the non-beam feeding end hanging beam crane 13 and the beam feeding end hanging beam crane 14 work cooperatively, after a precast beam is put into a bridge span, the fourth hanging rope 7 is separated from the precast beam, the non-beam feeding end hanging beam crane 13 sends a hanging point conversion device to a bridge deck or an area where the beam feeding end is constructed, and the hanging rope at the other end of the precast beam is manually removed;
and step nine, repeating the above operation to finish the erection of the residual precast beams.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (9)
1. The utility model provides a bridge precast beam hoisting point conversion equipment, its characterized in that includes rigid horizontal pole (3), triangle ring flange (4), first lifting rope (1), second lifting rope (5), third lifting rope (6) and fourth lifting rope (7), one side at rigid horizontal pole (3) both ends is respectively connected one first lifting rope (1) one side, and the opposite side and the triangle ring flange (4) of two first lifting ropes (1) are connected and are formed flexible triangle, second lifting rope (5) and third lifting rope (6) are connected respectively to the opposite side at rigid horizontal pole (3) both ends, and fourth lifting rope (7) are still connected towards the outside to triangle ring flange (4).
2. The bridge precast beam hanging point conversion device according to claim 1, wherein the rigid cross rod (3) is connected with the two first hanging ropes (1), the second hanging ropes (5) and the third hanging ropes (6) through lifting lugs (2), and the triangular flange plate (4) is connected with the two first hanging ropes (1) and the four hanging ropes (7) through the lifting lugs (2).
3. The bridge precast beam hanging point conversion device according to claim 1 or 2, wherein the bearing capacity safety coefficient of the first hanging rope (1), the second hanging rope (5), the third hanging rope (6) and the fourth hanging rope (7) is not less than 6.
4. The bridge precast beam hanging point conversion device according to claim 1, wherein the rigid cross rod (3) comprises a rectangular section steel pipe (31) and an ear plate (32), and two ends of the rectangular section steel pipe (31) are connected with the ear plate (32).
5. The bridge girder lifting point conversion device according to claim 4, wherein the cross section of the rectangular section steel pipe (31) is of a closed rectangular structure, and the lug plate (32) is positioned on the symmetric central line of the cross section of the rectangular section steel pipe (31).
6. The bridge precast beam lifting point conversion device according to claim 4, wherein the lug plates (32) extend into the rectangular section steel pipe (31) along the symmetrical center line of the section of the rectangular section steel pipe (31) to be welded with the rectangular section steel pipe, two lifting holes are formed in each lug plate (32) according to the size of the lifting lug (2), and the periphery of each lifting hole is reinforced by welding with a circular steel plate (33).
7. The bridge precast beam hanging point conversion device according to claim 4, wherein one hanging hole of the lug plate (32) is connected with a crane through a second hanging rope (5), a third hanging rope (6) and a lifting lug (2), and the other hanging hole is connected with a triangle flange plate (4) through a first hanging rope (1) and the lifting lug (2).
8. The bridge precast beam lifting point conversion device according to claim 2, wherein the triangular flange plate (4) is of an equilateral triangle, and three lifting holes are formed in the vertex angle of the triangular flange plate (4) according to the size of the lifting lug (2).
9. The bridge precast beam hanging point conversion device according to claim 8, wherein two hanging holes in the triangular flange plate (4) are connected with the lug plate (32) of the rigid cross rod (3) through a first hanging rope (1) and a lifting lug (2), and the rest hanging holes are connected with the precast beam through a fourth hanging rope (7) and a lifting lug (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321931797.8U CN220908153U (en) | 2023-07-21 | 2023-07-21 | Bridge precast beam hoisting point conversion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321931797.8U CN220908153U (en) | 2023-07-21 | 2023-07-21 | Bridge precast beam hoisting point conversion equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220908153U true CN220908153U (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321931797.8U Active CN220908153U (en) | 2023-07-21 | 2023-07-21 | Bridge precast beam hoisting point conversion equipment |
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| Country | Link |
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| CN (1) | CN220908153U (en) |
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2023
- 2023-07-21 CN CN202321931797.8U patent/CN220908153U/en active Active
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