CN108978486B - Automatic beam falling device and construction method thereof - Google Patents
Automatic beam falling device and construction method thereof Download PDFInfo
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- CN108978486B CN108978486B CN201811076173.6A CN201811076173A CN108978486B CN 108978486 B CN108978486 B CN 108978486B CN 201811076173 A CN201811076173 A CN 201811076173A CN 108978486 B CN108978486 B CN 108978486B
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 25
- 239000004575 stone Substances 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention relates to the technical field of bridge pushing construction, in particular to an automatic girder falling device, which comprises: the bracket and the operation platform are used for installing and supporting the automatic bridge girder dropping device; the removing device is used for sequentially removing the cushion blocks positioned at the top of the steel beam bracket or the bent cap from bottom to top in the beam falling process so as to finish the beam falling operation; and the jacking device is used for jacking the reserved cushion block in the cushion block removing process, and falling back the reserved cushion block after the cushion block is removed, the operation platform is fixed on the bent cap, and the upper surface of the operation platform is flush with the surface of the support cushion stone on the bent cap. By the technical scheme, the problems of high manual operation and construction risk and the like can be effectively solved, the safety of beam falling is ensured, and the automation degree of beam falling is improved. The invention further discloses a construction method of the automatic beam falling device.
Description
Technical Field
The invention relates to the technical field of bridge pushing construction, in particular to an automatic girder falling device and a construction method thereof.
Background
After the bridge pushing forwards moves to reach the target bridge position, the girder falling construction is required. The general process of beam falling is that a jack positioned on a temporary pier at one end of a bridge lifts up a beam body by about 2mm, a supporting stack body is dismantled by about 10cm, the jack falls back down and falls onto the rest supporting stack body, and the lower part of the jack is sequentially lowered by about 10cm to support the chopped body; and then repeating the steps by a jack positioned on the temporary pier at the other end of the bridge until the two sides fall to the same height. The beam falling process is circulated until the beam body approaches the design elevation, a beam falling jack jacks up the beam body, the beam Zhi Duo at the support is removed, the support is installed, the line shape of the beam body is tested and adjusted to meet the design requirement, and the support is anchored; and then the beam falling jack falls down, and the support is completely stressed.
Currently, aiming at the problem of large-tonnage bridge girder falling construction, according to the operation mode of the traditional construction method, as shown in fig. 1, constructors need to sequentially dismantle a cushion block 3 for supporting at a support seat at the top of a bent cap 2 and a cushion block 3 under a jack 5 at the top of a steel girder support 4 serving as a temporary pier in a manual operation mode. Meanwhile, in the oil return process of the jack 5 on the steel beam support 4, the beam body 1 needs to be manually identified after being lowered onto the cushion block 3 at the bent cap 2, and is fed back to the control platform at the other end of the bridge to perform the beam falling operation at the other end. The defect of the beam falling operation mode is that the operation is too artificial, the labor intensity is high, the efficiency is low, the personnel safety problem cannot be guaranteed, and if the beam falling operation is improper or is wrong, the safety problem is probably brought to the operators.
In view of the above problems, the present designer actively researches and innovates based on the practical experience and expertise which are rich for years in such product engineering application, and in combination with the application of the theory, so as to create an automatic bridge girder dropping device and a construction method thereof, which make the bridge girder dropping device more practical.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the automatic beam falling device and the construction method thereof, the device structure and the construction method are safe and reliable, the beam body can be safely and automatically installed at the target position, the problems of high manual operation and construction risk and the like are effectively solved, the safety of beam falling is ensured, and the automation degree of beam falling is improved.
The technical scheme of the invention is as follows:
an automatic beam dropping device comprising:
the bracket and the operation platform are used for installing and supporting the automatic bridge girder falling device;
the removing device is used for sequentially removing the cushion blocks positioned at the top of the steel beam bracket or the bent cap from bottom to top in the beam falling process so as to finish beam falling operation, wherein a jack for lifting the beam body is arranged on the cushion blocks positioned at the top of the steel beam bracket;
the jacking device is used for jacking the reserved cushion blocks in the process of removing the cushion blocks, and falling the reserved cushion blocks back after the cushion blocks are removed;
the operation platform is fixed on the bent cap, the upper surface of the operation platform is flush with the surface of the support cushion stone on the bent cap.
Further, the jacking device comprises two supporting longitudinal beams, two jacking cross beams and a jacking jack;
the lifting jack is arranged on the operation platform, the supporting longitudinal beam moves up and down relative to the operation platform under the action of the lifting jack, the lifting cross beam is arranged at the top of the supporting longitudinal beam, two ends of the lifting cross beam are respectively connected with the end parts of the two supporting longitudinal beams through extrusion springs, and in the process that the lifting jack drives the supporting longitudinal beam to move upwards, the two lifting cross beams respectively enter grooves positioned at two sides of the cushion block under the action of the extrusion springs and continuously drive the cushion block to lift;
wedge blocks are arranged in grooves on the two sides of the cushion block at the bottommost layer on the operation platform and used for ejecting the jacking cross beam out of the cushion block at the bottommost layer in the falling process of the jacking cross beam.
Further, the jack-up jack is provided with four, and even distribution in two support longeron bottoms, the jack-up jack is under non-jack-up state, support longeron lower surface with operation platform upper surface contact.
Further, displacement sensors and pressure sensors are arranged in the jack and the jacking jack and are respectively used for monitoring displacement height differences of all fulcrums and supporting counter forces of the fulcrums.
Further, each lifting jack is connected with an operation platform positioned on the bracket and the operation platform through a load balancing valve.
Further, the removing device comprises a folding arm type push-pull rod and a power device;
the end part of the folding arm type push-pull rod is driven by the power device to do linear motion and is used for pushing the cushion block.
Further, the power device comprises an asynchronous motor and a wheel body which rotates under the drive of the asynchronous motor, and the wheel body drags and pulls the folding arm type push-pull rod attached to the side wall of the wheel body in the rotating process.
Further, a guide block is arranged at the end part of the folding arm type push-pull rod and used for increasing the end area of the folding arm type push-pull rod.
The construction method of the automatic beam falling device comprises the following steps:
step 1: mounting a bracket and an operation platform on a bent cap, wherein a removing device and a jacking device are respectively arranged on the operation platform;
step 2: pushing the beam body to a beam falling position, namely, above the steel beam support and the cover beam, adjusting the heights of the cover beam and cushion blocks on the steel beam support to enable the cushion blocks on the upper part of the cover beam to be in contact with the lower surface of the beam body, and simultaneously enabling the top surface of the jack on the top of the steel beam support to be in contact with the lower surface of the beam body;
step 3: determining one end of the beam body as an operation end, and controlling the jack of the operation end to lift the beam body so that a cushion block above the capping beam is separated from the beam body;
step 4: jacking the cushion blocks except the bottommost part on the bent cap through the jacking device, removing the cushion blocks positioned at the bottommost part through the removing device, and falling the rest cushion blocks back;
step 5: returning oil to the jack, so that the beam body is returned to the cushion block above the capping beam after the height is reduced, and beam falling operation at one end of the beam body is completed;
step 6: 3-5, switching the other end of the beam body to be an operation end, and finishing the beam falling operation of the other end of the beam body;
step 7: repeating the steps 3-6 until the beam body is separated from the mounting design height of the support above the capping beam by a preset height, removing the rest cushion blocks and the operation platform, mounting the support, and lowering the beam body onto the support to finish beam falling.
Further, a bracket and an operation platform are arranged at the top of the steel beam bracket, a removing device and a jacking device are respectively arranged on the bracket and the operation platform, and a plurality of cushion blocks are arranged between the bracket and the operation platform and the jack;
after the beam falling of each operation end of the beam body is completed, the jacking device at the top of the steel beam support is used for jacking the cushion blocks except the bottommost part of the steel beam support, and the cushion blocks at the bottommost part are removed by the removing device, so that the bottom height of the jack is reduced.
By the scheme, the invention has at least the following advantages:
according to the automatic bridge girder dropping device, the bracket and the operation platform are respectively and detachably arranged on the bent cap and the top of the steel girder support serving as the temporary bridge pier, one cushion block is removed each time, the cushion blocks except for the bottommost cushion block are jacked up through the jacking device, the pressure of the cushion block to be removed is relieved, the bottommost cushion block is removed through the removing device, and the cushion block is dropped back, so that the problems of high manual operation and construction risk are effectively solved, the girder dropping safety is guaranteed, and the girder dropping automation degree is improved.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic view of the mounting location of a spacer block;
FIG. 2 is a schematic view of the structure of the automatic beam dropping device (wherein the bracket and the operation platform are seen through);
FIG. 3 is a schematic diagram of the operation of the jacking device;
FIG. 4 is a schematic structural view (perspective) of a pad;
reference numerals: the lifting device comprises a beam body 1, a capping beam 2, a cushion block 3, a groove 31, a steel beam bracket 4, a jack 5, an operating platform 7, a removing device 8, a folding arm type push-pull rod 81, a guide block 81a, a power device 82, an asynchronous motor 82a, a wheel body 82b, a lifting device 9, a supporting longitudinal beam 91, a lifting cross beam 92, a lifting jack 93, a pressing spring 94 and a wedge block 95.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
An automatic beam dropping device comprising: the bracket and the operation platform 7 are used for installing and supporting the automatic bridge girder dropping device; the removing device 8 is used for sequentially removing the cushion blocks 3 positioned at the top of the steel beam bracket 4 or the bent cap 2 from bottom to top in the beam falling process so as to finish the beam falling operation; the jacking device 9 is used for jacking the reserved cushion block 3 in the process of removing the cushion block 3, and returning the reserved cushion block 3 after the cushion block 3 is removed; the operation platform 7 is fixed on the bent cap 2, and the upper surface of the operation platform 7 is flush with the surface of the support cushion stone on the bent cap 2. According to the automatic bridge girder dropping device, the bracket and the operation platform 7 are respectively and detachably arranged on the cover girder 2, and the top of the temporary bridge pier girder support 4 is taken as an example of removing one cushion block 3 at a time, the cushion blocks 3 except for the bottommost cushion block 3 are jacked up by the jacking device 9, the pressure of the cushion blocks 3 to be removed is relieved, then the bottommost cushion block 3 is removed by the removing device 8, and the cushion blocks 3 are dropped back, so that girder dropping operation is automatically realized, and the height of the cushion blocks 3 can be set according to specific construction requirements.
As a preference of the above-described embodiment, the jacking device 9 includes two support stringers 91, two jacking beams 92 and a jacking jack 93; the lifting jack 93 is arranged on the operation platform 7, the supporting longitudinal beams 91 move up and down relative to the operation platform 7 under the action of the lifting jack 93, the lifting cross beams 92 are arranged at the tops of the supporting longitudinal beams 91, two ends of the lifting cross beams are respectively connected with the end parts of the two supporting longitudinal beams 91 through extrusion springs 94, and in the process that the lifting jack 93 drives the supporting longitudinal beams 91 to move upwards, the two lifting cross beams 92 respectively enter the grooves 31 positioned at two sides of the cushion block 3 under the action of the extrusion springs 94 and continuously drive the cushion block 3 to lift; wedge blocks 95 are arranged in grooves 31 on the two sides of the bottommost cushion block 3 on the operating platform 7 and are used for ejecting the lifting cross beam 92 from the bottommost cushion block 3 in the falling process of the lifting cross beam 92. As shown in fig. 3, a schematic view of the lifting beam 92 at two heights is shown, wherein in the process of moving the lifting beam 92 from top to bottom, that is, in the case that the bottom cushion block 3 is removed, when the lifting beam 92 moves to the position of the wedge block 95, the lifting beam 92 is removed from the groove 31 under the guiding action of the inclined plane, so that the cushion block 3 falls onto the bracket and the operation platform 7; in the process of the upward movement of the jacking cross beam 92 from bottom to top, the jacking cross beam 92 slides upwards along the side wall of the cushion block 3 at the bottommost layer until reaching the bottom of the cushion block 3 at the upper layer, and is extruded into the groove 31 under the action force of the extrusion spring 94 due to the existence of the groove 31, so that the cushion block 3 at the upper layer is driven to move upwards in the process of continuously moving the supporting longitudinal beam 91, the cushion block 3 at the bottommost layer can be removed under the action of external force, and the jacking jack 93 is returned when the cushion block 3 falls.
As a preferable example of the above embodiment, four jack-up jacks 93 are provided and uniformly distributed at the bottoms of the two support stringers 91, and the lower surfaces of the support stringers 91 are in contact with the upper surface of the operation platform 7 in the non-jack-up state of the jack-up jacks 93. The jack 93 can select the jack of a small range, saves the expense, and 4 jacks of a small range develop the jacking operation simultaneously, guarantee the stationarity of jacking.
As a preferable mode of the above embodiment, the jack 5 and the jack 93 are provided with a displacement sensor and a pressure sensor for monitoring the displacement height difference of each fulcrum and the fulcrum support reaction force, respectively.
Preferably, in the above embodiment, each jack 93 is connected to the console 71 on the bracket and the console 7 through an averaging valve. The load balancing valve is used for guaranteeing the working consistency of all lifting jacks 93, guaranteeing the lifting height consistency or the falling height consistency and synchronously applying force.
Preferably, the removal device 8 comprises a folding arm push-pull rod 81 and a power device 82; the end part of the folding arm type push-pull rod 81 is driven by the power device 82 to move linearly for pushing the cushion block 3. The power device 82 includes an asynchronous motor 82a, and a wheel 82b that rotates under the driving of the asynchronous motor 82a, where the wheel 82b pulls the folding arm type push-pull rod 81 attached to the side wall thereof during the rotation process. In order to ensure the accuracy of the pushing direction of the cushion block 3, the end of the folding arm type push-pull rod 81 is provided with a guide block 81a for increasing the end area of the folding arm type push-pull rod 81.
The construction method of the automatic beam falling device comprises the following steps:
step 1: the bracket and the operation platform 7 are arranged on the capping beam 2, the removal device 8 and the jacking device 9 are respectively arranged on the operation platform 7, and the removal device 8 and the jacking device 9 can adopt the structures; the cushion block 3 is arranged between the supporting longitudinal beam 91 and the jacking cross beam 92, the position of the cushion block 3 is convenient for the jacking cross beam 92 to jack the cushion block 3 at the upper part, and the distance between the cushion block 3 and the jacking cross beam 92 is 1-2 cm;
step 2: pushing the beam body 1 to a beam falling position, namely, above the steel beam support 4 and the bent cap 2, adjusting the heights of the bent cap 2 and the cushion blocks 3 on the steel beam support 4 to enable the cushion blocks 3 on the upper part of the bent cap 2 to be in contact with the lower surface of the beam body 1, and simultaneously enabling the top surface of the jack 5 on the top of the steel beam support 4 to be in contact with the lower surface of the beam body 1; in the above description, the front end of the jack 5 is provided with the safety bolster, and the safety bolster is used for ensuring the uniformity of force application when the jack 5 supports the beam body 1, so that the beam body 1 is not locally deformed due to overlarge local stress; the fixed end of the jack 5 is fixedly connected with the top end of the cushion block 3, so that the safety and the accuracy of construction can be ensured, and the jack 5 is detached from the cushion block 3 when the girder falling construction is finished or maintenance is carried out; wherein, in order to ensure the safety, the steel pipe supports 4 are ensured to be arranged in parallel, and the heights of the steel pipe supports are ensured to be consistent.
Step 3: determining one end of the beam body 1 as an operation end, and controlling a jack 5 of the operation end to jack up the beam body 1 so that a cushion block 3 above the capping beam 2 is separated from the beam body 1;
step 4: jacking the cushion blocks 3 except the bottommost part on the cover beam 2 through a jacking device 9, and removing the cushion blocks 3 positioned at the bottommost part through a removing device 8;
step 5: the jack 5 returns oil, so that the beam body 1 is fallen back onto the cushion block 3 with the height lowered above the capping beam 2, and the beam falling operation at one end of the beam body 1 is completed;
step 6: 3-5, switching the other end of the beam body 1 to be an operation end, and finishing the beam falling operation of the other end of the beam body 1;
step 7: repeating the steps 3-6 until the beam body 1 is separated from the mounting design height of the support above the capping beam 2 by a preset height, removing the rest cushion blocks 3 and the operation platform, mounting the support, and lowering the beam body 1 onto the support to finish beam falling.
As a preference of the above embodiment, in order to reduce the working range of the jack 5 and ensure the supporting rigidity thereof, the top of the steel beam bracket 4 is provided with a bracket and an operating platform 7, the bracket and the operating platform 7 are respectively provided with a removing device 8 and a jacking device 9, and a plurality of cushion blocks 3 are arranged between the bracket and the operating platform 7 and the jack 5; after the beam falling of each operation end of the beam body 1 is completed, the bottom cushion block 3 except for the bottom part on the steel beam support 4 is lifted by the lifting device 9 positioned at the top of the steel beam support 4, and the bottom cushion block 3 positioned at the bottom part is removed by the removing device 8, so that the bottom height of the jack 5 is reduced. By the mode, the working range of the jack 5 can be reduced through the arrangement of the cushion blocks 3, and the synchronism of the beam falling process is ensured through the gradual removal of the cushion blocks 3.
In the above description, in the beam falling process, the jack 5 should record displacement and pressure each time the jack is lifted and falls back to the detachable cushion block 3, so as to determine the height difference of each supporting point and the supporting point supporting force, and monitor the change condition of the height difference of the supporting points and the supporting point supporting force of the adjacent piers and the same piers, so as to avoid exceeding the standard value and bringing unnecessary safety problem. Meanwhile, the fulcrum height difference and the supporting reaction force are analyzed, and the beam falling process is properly adjusted. When a series of problems of limited beam falling operation space, high manual operation danger, long construction operation time, high labor intensity and the like are faced, the beam falling device can realize automatic falling of the beam body, effectively control the synchronism of beam falling, effectively solve the problems of high manual operation and construction risk and the like, ensure the safety of beam falling and improve the automation degree of beam falling.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (6)
1. An automatic beam dropping device, comprising:
the bracket and the operation platform (7) are used for installing and supporting the automatic beam falling device;
the removing device (8) is used for sequentially removing the cushion blocks (3) positioned at the top of the steel beam support (4) or the cover beam (2) from bottom to top in the beam falling process so as to finish beam falling operation, wherein a jack (5) for lifting the beam body (1) is arranged on the cushion blocks (3) positioned at the top of the steel beam support (4);
the jacking device (9) is used for jacking the reserved cushion block (3) in the process of removing the cushion block (3), and falling the reserved cushion block (3) back after the cushion block (3) is removed;
the operation platform (7) is fixed on the bent cap (2), and the upper surface of the operation platform (7) is flush with the surface of the support cushion stone on the bent cap (2);
the jacking device (9) comprises two supporting longitudinal beams (91), two jacking cross beams (92) and a jacking jack (93);
the lifting jack (93) is arranged on the operation platform (7), the supporting longitudinal beams (91) move up and down relative to the operation platform (7) under the action of the lifting jack (93), the lifting cross beams (92) are arranged at the tops of the supporting longitudinal beams (91), two ends of the lifting cross beams are respectively connected with the ends of the two supporting longitudinal beams (91) through extrusion springs (94), and in the process that the lifting jack (93) drives the supporting longitudinal beams (91) to move upwards, the two lifting cross beams (92) respectively enter grooves (31) positioned at two sides of the cushion block (3) under the action of the extrusion springs (94) and continuously drive the cushion block (3) to lift;
wedge blocks (95) are arranged in grooves (31) positioned on two sides of the cushion block (3) at the bottommost layer on the operation platform (7) and used for ejecting the jacking cross beam (92) from the cushion block (3) at the bottommost layer in the falling process of the jacking cross beam (92);
the removing device (8) comprises a folding arm type push-pull rod (81) and a power device (82);
the end part of the folding arm type push-pull rod (81) is driven by the power device (82) to move linearly and is used for pushing the cushion block (3);
the power device (82) comprises an asynchronous motor (82 a) and a wheel body (82 b) which rotates under the drive of the asynchronous motor (82 a), and the wheel body (82 b) pulls a folding arm type push-pull rod (81) attached to the side wall of the wheel body in the rotating process;
the end part of the folding arm type push-pull rod (81) is provided with a guide block (81 a) for increasing the end part area of the folding arm type push-pull rod (81).
2. The automatic beam dropping device according to claim 1, wherein four jack-up jacks (93) are provided and uniformly distributed at the bottoms of two support stringers (91), and the jack-up jacks (93) are in contact with the upper surface of the operating platform (7) at the lower surface of the support stringers (91) in a non-jack-up state.
3. The automatic beam dropping device according to claim 1, wherein the jack (5) and the lifting jack (93) are respectively provided with a displacement sensor and a pressure sensor for respectively monitoring the displacement height difference of each fulcrum and the fulcrum supporting force.
4. Automatic beam dropping device according to claim 1, characterized in that each lifting jack (93) is connected with an operating table (71) located on the operating platform (7) through an averaging valve.
5. The construction method of the automatic beam falling device is characterized by comprising the following steps of:
step 1: a bracket and an operation platform (7) are arranged on the bent cap (2), and a removing device (8) and a jacking device (9) are respectively arranged on the operation platform (7);
step 2: pushing the beam body (1) to a beam falling position, namely, above the steel beam support (4) and the cover beam (2), and adjusting the heights of the cover beam (2) and the cushion blocks (3) on the steel beam support (4) to enable the cushion blocks (3) on the upper part of the cover beam (2) to be in contact with the lower surface of the beam body (1), wherein meanwhile, the top surface of the jack (5) at the top of the steel beam support (4) is in contact with the lower surface of the beam body (1);
step 3: determining one end of the beam body (1) as an operation end, and controlling the jack (5) of the operation end to lift the beam body (1) so that the cushion block (3) above the capping beam (2) is separated from the beam body (1);
step 4: jacking the cushion blocks (3) except the bottommost part on the bent cap (2) through the jacking device (9), removing the cushion blocks (3) positioned at the bottommost part through the removing device (8), and falling the rest cushion blocks (3) back;
step 5: the jack (5) returns oil, so that the beam body (1) is fallen back onto the cushion block (3) with the height above the capping beam (2) reduced, and one end of the beam body (1) is subjected to beam falling operation;
step 6: switching the other end of the beam body (1) to be an operation end, and completing the beam falling operation of the other end of the beam body (1) in steps 3-5;
step 7: repeating the steps 3-6 until the beam body (1) is separated from the mounting design height of the support above the capping beam (2) by a preset height, removing the rest cushion blocks (3) and the operation platform (7), mounting the support, and lowering the beam body (1) onto the support to finish beam falling.
6. The construction method of the automatic beam falling device according to claim 5, wherein a bracket and an operation platform (7) are also arranged at the top of the steel beam bracket (4), a removing device (8) and a jacking device (9) are respectively arranged on the bracket and the operation platform (7), and a plurality of cushion blocks (3) are arranged between the bracket and the operation platform (7) and the jack (5);
after the beam falling of each operation end of the beam body (1) is completed, the lifting device (9) positioned at the top of the steel beam support (4) is used for lifting the cushion block (3) except the bottommost part on the steel beam support (4), and the cushion block (3) is removed through the removing device (8), so that the bottom height of the jack (5) is reduced.
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| CN201811076173.6A CN108978486B (en) | 2018-09-14 | 2018-09-14 | Automatic beam falling device and construction method thereof |
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| CN201811076173.6A CN108978486B (en) | 2018-09-14 | 2018-09-14 | Automatic beam falling device and construction method thereof |
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| CN108978486A CN108978486A (en) | 2018-12-11 |
| CN108978486B true CN108978486B (en) | 2024-01-30 |
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| CN109972522B (en) * | 2019-03-07 | 2020-10-23 | 中交二航局第四工程有限公司 | Self-falling type adjustable box girder installation method |
| CN110258336A (en) * | 2019-05-16 | 2019-09-20 | 中铁七局集团有限公司 | A kind of broad box girder falls beam control method |
| CN111188283A (en) * | 2020-03-05 | 2020-05-22 | 陕西路桥集团有限公司 | Method for integrally and synchronously jacking and falling steel bridge |
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| CN104343088A (en) * | 2013-07-26 | 2015-02-11 | 秦皇岛天业通联重工股份有限公司 | Bridge erecting machine and girder erecting method |
| CN105350457A (en) * | 2015-11-13 | 2016-02-24 | 中铁大桥局集团第一工程有限公司 | Method for falling of steel trough beam in bridge walking type pushing construction |
| CN107354871A (en) * | 2017-08-11 | 2017-11-17 | 中国水利水电第七工程局有限公司 | A kind of precast beam is traversing and vertical fall girder apparatus and falls beam method |
| CN108330837A (en) * | 2018-02-05 | 2018-07-27 | 石家庄铁道大学 | Set up the construction method of girder steel |
| CN208899350U (en) * | 2018-09-14 | 2019-05-24 | 苏交科集团股份有限公司 | Intelligence jacking is united with girder system is fallen |
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| CN108978486A (en) | 2018-12-11 |
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