CN112127285A - Inhaul cable device for whole-hole span-by-span construction of reinforced concrete composite beam - Google Patents
Inhaul cable device for whole-hole span-by-span construction of reinforced concrete composite beam Download PDFInfo
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- CN112127285A CN112127285A CN202011040433.1A CN202011040433A CN112127285A CN 112127285 A CN112127285 A CN 112127285A CN 202011040433 A CN202011040433 A CN 202011040433A CN 112127285 A CN112127285 A CN 112127285A
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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 discloses a guy cable device for whole-hole span-by-span construction of a steel-concrete composite beam, which belongs to the technical field of bridge construction and comprises a bridge pier, wherein a beam box is arranged at the top end of the bridge pier through a bridge erecting machine, at least three groups of guy cable mechanisms for drawing flanges on two sides of the top end of the beam box are arranged on a cross beam of the bridge erecting machine, each guy cable mechanism comprises a winding device with a rope and a hook connected with the free end of the rope through a connecting block, and a limiting mechanism for positioning the hook is arranged at the bottom end of the cross beam of the bridge erecting machine. According to the invention, the telescopic end of the hydraulic cylinder is rotationally connected with the connecting block at the hook position on the inhaul cable mechanism, so that the hydraulic cylinders at two sides of the hook can limit the hook on the rope during winding and unwinding, the hook is ensured not to swing greatly during up-down position adjustment, the connection between the hook and the hanging ring is facilitated, meanwhile, the horizontal dislocation of the beam box on a bridge pier is also ensured, and the traction effect of the inhaul cable mechanism is improved.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a cable device for whole-hole span-by-span construction of a reinforced concrete composite beam.
Background
The bridge construction refers to a process of building a bridge according to design contents; mainly refers to the contents of bridge construction technology, construction organization, construction management, construction quality and the like; because the steel-concrete composite beam has a series of advantages of light structure, large crossing energy, high construction speed and the like, the construction requirements of urban viaducts and river-crossing and sea-crossing long bridges can be met to the greatest extent, and the steel-concrete composite beam is more and more widely applied to modern bridge structures.
The patent with the publication number of CN 207597269U discloses a cable device for whole-hole span-by-span construction of a steel-concrete composite beam, which pulls steel beam units without support supports through a plurality of sets of cable tensioning mechanisms to reduce the effect of bridge decks and poured concrete on the steel beam units and ensure smooth bridge construction, but because the cables in the cable tensioning mechanisms cannot be limited, the cable tensioning mechanisms have large acting force on the steel beam units and the cable swinging amplitude is large, the steel beam units can be horizontally dislocated on piers, and the laying quality of the steel beam units is influenced.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to provide a guy cable device for whole-hole span-by-span construction of a steel-concrete composite beam, so as to solve the problems in the background technology.
2. Technical scheme
In order to solve the problems, the invention adopts the following technical scheme:
a guy cable device for whole-hole span-by-span construction of a steel-concrete composite beam comprises a bridge pier, a beam box is arranged at the top end of the bridge pier through a bridging machine frame, a bridging machine cross beam on the bridging machine is arranged right above the bridge pier through a support, at least three groups of guy cable mechanisms for drawing flanges on two sides of the top end of the beam box are arranged on the bridging machine cross beam, each group of guy cable mechanisms are respectively provided with two guy cable mechanisms, each group of two guy cable mechanisms are symmetrical about a vertical center line of the bridge pier, each guy cable mechanism comprises a winding device with a rope and a hook connected with a free end of the rope through a connecting block, the bottom end of a shell of the winding device is in sliding connection with the bridging machine cross beam, the flanges on two sides of the top end of the beam box are pre-embedded with hanging rings matched with the size of the hook, the hanging rings on the beam box are distributed at equal intervals on the, stop gear including the connecting plate of sliding locate bridge crane crossbeam bottom and with the coiling mechanism one-to-one, rotate the hydraulic cylinder of being connected through articulated seat and connecting plate bottom left and right sides, every flexible serving of two hydraulic cylinders that correspond is connected with the connecting block rotation that corresponds the side couple top through another articulated seat respectively, constitutes an adjustable tripod between the connecting plate of every two adjacent hydraulic cylinders and corresponding side, every two hydraulic cylinders that correspond all are located the both sides that correspond the side rope.
Preferably, the winding device is an electric winch.
Preferably, every gyro wheel one is all installed on the bottom surface of coiling mechanism casing, be equipped with along its length direction on the bridge girder erection machine crossbeam and supply a gliding spacing spout of gyro wheel one.
Preferably, the housing of each winding device is connected with the connecting plate on the corresponding side through a connecting mechanism.
Preferably, coupling mechanism includes to rotate through the bearing locate on the connecting plate and run through two threaded rods of bridging machine crossbeam perpendicularly, with threaded rod bottom fixed connection and install in the motor of connecting plate bottom, every vertical central line symmetry about the connecting plate of two threaded rods of corresponding all, every equal shaping is equipped with the thread bush piece that cup joints with the threaded rod one-to-one and with the threaded rod thread on the casing of coiling mechanism.
Preferably, the cross beam of the bridge girder erection machine is provided with a strip-shaped through hole for the threaded rod and the rope to vertically pass through.
Preferably, a second roller is mounted on the surface of the top end of each connecting plate, a second limiting sliding groove for the second roller to slide is formed in the surface of the bottom end of the cross beam of the bridge girder erection machine, and the second limiting sliding groove is parallel to the first limiting sliding groove.
3. Advantageous effects
1. The invention can draw the beam box without support through the guy cable mechanism, so as to reduce the effect of the bridge deck paved on the beam box and the wet-poured concrete on the beam box, enhance the bearing capacity of the beam box, ensure the smooth operation of bridge construction, in addition, the telescopic end of the hydraulic cylinder is rotationally connected with a connecting block at the position of the hook on the inhaul cable mechanism, so that the hydraulic cylinders at the two sides of the hook can limit the hook on the rope during winding and unwinding, so as to ensure that the hook does not swing greatly when the upper and lower positions are adjusted, facilitate the connection of the hook and the hanging ring, meanwhile, the horizontal dislocation of the beam box on the bridge pier can not occur, the traction effect of the guy cable mechanism is improved, when the guy cable mechanism is used for drawing the beam box, accessible hydraulic cylinder is to the support of couple tip, to the effort that reduces the couple and receive to the reinforcing couple is to the tractive effect of roof beam case.
2. The first roller slides on the cross beam of the bridge girder erection machine, so that people can conveniently adjust the position of the winding device on the cross beam of the bridge girder erection machine, the connection between the hook and the hanging ring on the inhaul cable mechanism is convenient, and in addition, the first roller is in contact with the first limiting sliding groove, so that the inhaul cable mechanism can be adjusted in position along the first limiting sliding groove, and the inhaul cable mechanism is limited during position adjustment.
3. The invention drives the threaded rod to rotate through the operation of the motor, so that the threaded sleeve block can adjust the up-and-down position on the threaded rod under the rotation of the threaded rod, thereby realizing the connection between the connecting plate and the shell of the rolling device and the upper-and-lower ends of the bridge girder erection machine beam respectively, namely when the threaded sleeve block moves downwards on the threaded rod, the distance between the connecting plate and the shell of the rolling device is reduced, thereby the connecting plate and the shell of the rolling device can be clamped at the upper-and-lower ends of the bridge girder erection machine beam to realize the fixation between the connecting plate and the rolling device, when the distance between the connecting plate and the rolling device is increased under the rotation of the threaded rod, the connecting plate and the rolling device can move simultaneously with the connecting plate by moving the rolling device under the connection of the threaded rod, and the connection mode between the connecting plate, the rolling device and the bridge girder erection machine beam is simple and has high flexibility, the installation of people to connecting plate, coiling mechanism is made things convenient for.
4. When the connecting plate is clamped at the bottom end of the bridge girder erection machine cross beam through the threaded rod, the connecting plate can be limited through the contact between the second roller and the second limiting sliding groove on the bridge girder erection machine cross beam, and in addition, through the contact between the first roller and the first limiting sliding groove, the connecting plate and the winding device can limit the connecting plate and the winding device clamped at the upper end and the lower end of the bridge girder erection machine cross beam under the contact between the second roller and the first roller and the sliding groove, so that the dislocation of the inhaul cable mechanism during working is avoided, and the stability of the inhaul cable mechanism is ensured.
Drawings
FIG. 1 is a schematic front view of the internal structure of the present invention;
FIG. 2 is a side view of the external structure of the present invention;
fig. 3 is an enlarged schematic view of a portion a in fig. 1.
Reference numerals: 1-pier, 2-beam box, 3-bracket, 4-bridge girder erection machine, 5-guy cable mechanism, 6-electric winch, 7-rope, 8-connecting block, 9-hook, 10-roller I, 11-limit chute I, 12-connecting plate, 13-hydraulic cylinder, 14-hinged seat, 15-threaded rod, 16-threaded sleeve connecting block, 17-hanging ring, 18-strip-shaped perforation, 19-motor, 20-roller II and 21-limit chute II.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
The inhaul cable device for the whole-hole span-by-span construction of the steel-concrete composite beam comprises a bridge pier 1, a beam box 2 is arranged at the top end of the bridge pier 1 through a bridging machine frame, a bridging machine cross beam 4 on the bridging machine is arranged right above the bridge pier 1 through a support 3, at least three groups of inhaul cable mechanisms 5 for drawing flanges on two sides of the top end of the beam box 2 are arranged on the bridging machine cross beam 4, each group of inhaul cable mechanisms 5 is provided with two inhaul cable mechanisms 5, each group of two inhaul cable mechanisms 5 is symmetrical about a vertical central line of the bridge pier 1, each inhaul cable mechanism 5 comprises a winding device with a rope 7 and a hook 9 connected with the free end of the rope 7 through a connecting block 8, the bottom end of a shell of the winding device is connected with the bridging machine cross beam 4 in a sliding mode, a first winding roller 10 is arranged on the bottom end surface of the shell of each rolling device, a first limiting sliding chute 11 for the first, the sliding of the first roller 10 on the bridge girder erection machine cross beam 4 is convenient for people to adjust the position of the winding device on the bridge girder erection machine cross beam 4 so as to facilitate the connection of the hook 9 and the hanging ring 17 on the inhaul cable mechanism 5, in addition, the contact of the first roller 10 and the first limiting sliding groove 11 is used for adjusting the position of the inhaul cable mechanism 5 along the first limiting sliding groove 11 so as to limit the inhaul cable mechanism 5 during position adjustment, and the winding device is an electric winch 6;
hanging rings 17 matched with the size of the hook 9 are pre-embedded on flanges on two sides of the top end of the beam box 2, the hanging rings 17 on the beam box 2 are distributed on the top end of the beam box at equal intervals, a limiting mechanism for positioning the hook 9 is arranged at the bottom end of a cross beam 4 of the bridge girder erection machine, the limiting mechanism comprises connecting plates 12 which are slidably arranged at the bottom end of the cross beam 4 of the bridge girder erection machine and are in one-to-one correspondence with winding devices, hydraulic cylinders 13 which are rotatably connected with the left side and the right side of the bottom end of the connecting plate 12 through hinge seats 14, and a shell of each winding device is connected with the;
the connecting mechanism comprises two threaded rods 15 which are rotatably arranged on the connecting plate 12 through bearings and vertically penetrate through the bridge girder erection machine crossbeam 4, a motor 19 which is fixedly connected with the bottom ends of the threaded rods 15 and is installed at the bottom end of the connecting plate 12, each pair of two corresponding threaded rods 15 are symmetrical about the vertical central line of the connecting plate 12, a threaded sleeve connecting block 16 which is in one-to-one correspondence with the threaded rods 15 and is in threaded sleeve connection with the threaded rods 15 is formed on the shell of each winding device, the threaded rods 15 are driven to rotate through the operation of the motor 19, the threaded sleeve connecting blocks 16 are adjusted in the vertical positions on the threaded rods 15 under the rotation of the threaded rods 15, so that the connecting plate 12 and the shell of each winding device are respectively connected with the upper end and the lower end of the bridge girder erection machine crossbeam 4, namely, when the threaded sleeve connecting blocks 16 move downwards on the threaded rods 15, the distance between the connecting plate 12, The shell of the winding device is clamped at the upper end and the lower end of a cross beam 4 of the bridge girder erection machine so as to fix the connecting plate 12 and the winding device, when the distance between the connecting plate 12 and the winding device is increased under the rotation of the threaded rod 15, the connecting plate 12 and the winding device can be connected with the threaded rod 15 and can move simultaneously with the connecting plate 12 by moving the winding device, and the connection mode between the connecting plate 12, the winding device and the cross beam 4 of the bridge girder erection machine is simple and high in flexibility, so that people can conveniently install the connecting plate 12 and the winding device;
each telescopic end of two corresponding hydraulic cylinders 13 is rotatably connected with a connecting block 8 at the top end of a corresponding side hook 9 through another hinged seat 14, an adjustable tripod is formed between each two adjacent hydraulic cylinders 13 and a connecting plate 12 at the corresponding side, each two corresponding hydraulic cylinders 13 are positioned at two sides of a rope 7 at the corresponding side, a threaded rod 15 is arranged on a bridge girder 4, a strip-shaped perforation 18 through which the rope 7 vertically passes is arranged, the arrangement of the strip-shaped perforation 18 is convenient for the movement adjustment of the rope 7 on the bridge girder 4, a roller two 20 is arranged on the top surface of each connecting plate 12, a limit chute two 21 for the sliding of the roller two 20 is arranged on the bottom surface of the bridge girder 4, the limit chute two 21 is parallel to the limit chute one 11, when the connecting plate 12 is clamped at the bottom end of the bridge girder 4 through the threaded rod 15, the roller two 20 can be in contact with the limit chute two 21 on the bridge girder 4, the connecting plate 12 is limited, and in addition, the connecting plate 12 and the winding device can be limited by the contact of the first roller 10 and the first limiting sliding groove 11 under the contact of the second roller 20, the first roller 10 and the sliding groove, so that the connecting plate 12 and the winding device clamped at the upper end and the lower end of the bridge girder erection machine beam 4 are prevented from being misplaced during the operation of the inhaul cable mechanism 5, and the stability of the inhaul cable mechanism 5 is ensured.
The specific application process of the inhaul cable device for the whole-hole span-by-span construction of the reinforced concrete composite beam is as follows: when in use, firstly, the bridge girder erection machine is moved between the bridge piers 1, secondly, the bridge girder box 2 is erected between the two bridge piers 1 through the bridge girder erection machine, in order to enhance the bearing capacity of the bridge girder box 2, the bridge girder box 2 is drawn through the cable mechanism 5, when the cable mechanism 5 is connected with the bridge girder box 2, the hanging rings 17 are pre-embedded on the flanges at the two sides of the top end of the bridge girder box 2, when the bridge girder box 2 is erected, the winding device moves on the cross girder 4 of the bridge girder erection machine through the winding device, the position of the winding device is adjusted until the winding device is vertically aligned with the hanging rings 17, when the winding device is adjusted in position, the connecting plate 12 is connected with the thread sleeve connecting block 16 through the thread of the thread rod 15, the connecting plate 12 is connected with the winding device, thereby the connecting plate 12 moves along with the bottom end of the cross girder 4 of the bridge girder erection machine when the winding device moves, after the winding device and the connecting, the threaded sleeve connecting block 16 moves downwards on the threaded rod 15 under the rotation of the threaded rod 15, so that the distance between the connecting plate 12 and the shell of the winding device is shortened, the connecting plate 12 and the shell of the winding device can be clamped at the upper end and the lower end of the bridge girder erection machine cross beam 4 along with the continuous rotation of the threaded rod 15, so that the fixing of the connecting plate 12 and the winding device is realized, when the winding device moves on the bridge girder erection machine cross beam 4, the position of the winding device can be conveniently adjusted by people through the sliding of the first roller 10 and the first limiting sliding chute 11, and the winding device and the connecting plate 12 clamped at the upper end and the lower end of the bridge girder erection machine cross beam 4 are limited through the contact of the first roller 10 and the second roller 20 on the connecting plate 12 with the limiting sliding chutes respectively, so that the stability performance of the inhaul cable mechanism;
when the beam box 2 is pulled by the rope 7 on the inhaul cable mechanism 5, the telescopic end of the hydraulic cylinder 13 can be rotationally connected with the connecting block 8 at the position of the hook 9 on the inhaul cable mechanism 5, so that the hydraulic cylinders 13 positioned at two sides of the hook 9 can limit the hook 9 on the rope 7 during winding and unwinding, the hook 9 is ensured not to swing greatly during adjustment of the upper position and the lower position, the connection between the hook 9 and the hanging ring 17 is facilitated, meanwhile, the beam box 2 is also ensured not to be dislocated in the horizontal direction on the pier 1, and the pulling effect of the inhaul cable mechanism 5 is improved;
the inhaul cable mechanism 5 is connected with the connecting plate 12 through the threaded rod 15, so that people can conveniently assemble the winding device on the inhaul cable mechanism 5 and the connecting plate 12 with the bridge girder erection machine beam 4, and the using process of the inhaul cable device for the whole-hole span-by-span construction of the steel-concrete composite beam is completed.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (7)
1. A guy cable device for whole-hole span-by-span construction of a steel-concrete composite beam comprises a bridge pier (1), a beam box (2) is arranged at the top end of the bridge pier (1) through a bridging machine frame, a bridging machine cross beam (4) on the bridging machine is arranged right above the bridge pier (1) through a support (3), the guy cable device is characterized in that at least three groups of guy cable mechanisms (5) are arranged on the bridging machine cross beam (4) and used for drawing flanges on two sides of the top end of the beam box (2), each group of guy cable mechanisms (5) are respectively provided with two guy cable mechanisms (5), each group of the two guy cable mechanisms (5) are symmetrical about a vertical central line of the bridge pier (1), each guy cable mechanism (5) comprises a winding device with a rope (7) and a hook (9) connected with the free end of the rope (7) through a connecting block (8), and the bottom end of a shell of the winding device is, the flange pre-buried of roof beam case (2) top both sides is equipped with the link (17) of couple (9) size looks adaptation, link (17) on roof beam case (2) are equidistant distributes in its top, the bottom of bridging machine crossbeam (4) is equipped with the stop gear who fixes a position couple (9), stop gear includes the connecting plate (12) that slides and locate bridging machine crossbeam (4) bottom and with coiling mechanism one-to-one, through articulated seat (14) and the hydraulic cylinder (13) of connecting plate (12) bottom left and right sides rotation connection, on the flexible end of every two corresponding hydraulic cylinder (13) respectively through another articulated seat (14) with the connecting block (8) rotation connection of corresponding side couple (9) top, constitute an adjustable tripod between every two adjacent hydraulic cylinder (13) and the connecting plate (12) of corresponding side, every two corresponding hydraulic cylinders (13) are positioned on two sides of the corresponding side rope (7).
2. A cable device for whole-hole span-by-span construction of a steel-concrete composite beam according to claim 1, wherein the winding device is an electric winch (6).
3. A cable device for whole hole span-by-span construction of a steel-concrete composite beam according to claim 2, wherein a first roller (10) is installed on the bottom end surface of each winding device shell, and a first limiting sliding groove (11) for the first roller (10) to slide is formed in the bridge girder erection machine cross beam (4) along the length direction of the bridge girder erection machine cross beam.
4. A cable device for whole hole span-by-span construction of a steel-concrete composite beam according to claim 1, wherein the housing of each winding device is connected with the connecting plate (12) on the corresponding side through a connecting mechanism.
5. The inhaul cable device for whole-hole span-by-span construction of the steel-concrete composite beam as claimed in claim 4, wherein the connection mechanism comprises two threaded rods (15) which are rotatably arranged on the connection plate (12) through bearings and vertically penetrate through the cross beam (4) of the bridge girder erection machine, and a motor (19) which is fixedly connected with the bottom ends of the threaded rods (15) and is installed at the bottom end of the connection plate (12), each pair of two corresponding threaded rods (15) are symmetrical about a vertical central line of the connection plate (12), and a thread sleeve connection block (16) which corresponds to the threaded rods (15) one by one and is in thread sleeve connection with the threaded rods (15) is formed on a shell of each winding device.
6. A cable device for whole-hole span-by-span construction of a steel-concrete composite beam according to claim 5, wherein the cross beam (4) of the bridge girder erection machine is provided with a strip-shaped through hole (18) for a threaded rod (15) and a rope (7) to vertically pass through.
7. The inhaul cable device for whole-hole span-by-span construction of the steel-concrete composite beam according to claim 1, wherein a second roller (20) is installed on the top end surface of each connecting plate (12), a second limiting sliding groove (21) for the second roller (20) to slide is formed in the bottom end surface of the bridge girder erection machine cross beam (4), and the second limiting sliding groove (21) is parallel to the first limiting sliding groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011040433.1A CN112127285A (en) | 2020-09-28 | 2020-09-28 | Inhaul cable device for whole-hole span-by-span construction of reinforced concrete composite beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011040433.1A CN112127285A (en) | 2020-09-28 | 2020-09-28 | Inhaul cable device for whole-hole span-by-span construction of reinforced concrete composite beam |
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| Publication Number | Publication Date |
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| CN112127285A true CN112127285A (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011040433.1A Pending CN112127285A (en) | 2020-09-28 | 2020-09-28 | Inhaul cable device for whole-hole span-by-span construction of reinforced concrete composite beam |
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| CN (1) | CN112127285A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585099A (en) * | 2021-09-28 | 2021-11-02 | 中交投资南京有限公司 | Deviation monitoring system for double-span synchronous tension bridge girder erection machine and construction method for reinforced concrete composite bridge |
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| JP2005240353A (en) * | 2004-02-25 | 2005-09-08 | Ohbayashi Corp | Erection method of bridge |
| CN206691680U (en) * | 2017-05-13 | 2017-12-01 | 涡阳财富康达制动元件有限公司 | Vehicle bridge transfer carriage |
| CN207597269U (en) * | 2017-12-14 | 2018-07-10 | 河南省交通规划设计研究院股份有限公司 | The cable arrangement constructed by cross for the whole hole of steel reinforced concrete combination beam |
| CN208234405U (en) * | 2018-05-08 | 2018-12-14 | 上海神尹重工机械设备有限公司 | A kind of bridge crane |
| CN208617230U (en) * | 2018-07-16 | 2019-03-19 | 天津市川丰电气技术有限责任公司 | A kind of crane, which rises, puts anti-roll device |
| CN211235562U (en) * | 2019-11-21 | 2020-08-11 | 武汉普渡生物医药有限公司 | Clinical experiment detection viewing device |
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2020
- 2020-09-28 CN CN202011040433.1A patent/CN112127285A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240353A (en) * | 2004-02-25 | 2005-09-08 | Ohbayashi Corp | Erection method of bridge |
| CN206691680U (en) * | 2017-05-13 | 2017-12-01 | 涡阳财富康达制动元件有限公司 | Vehicle bridge transfer carriage |
| CN207597269U (en) * | 2017-12-14 | 2018-07-10 | 河南省交通规划设计研究院股份有限公司 | The cable arrangement constructed by cross for the whole hole of steel reinforced concrete combination beam |
| CN208234405U (en) * | 2018-05-08 | 2018-12-14 | 上海神尹重工机械设备有限公司 | A kind of bridge crane |
| CN208617230U (en) * | 2018-07-16 | 2019-03-19 | 天津市川丰电气技术有限责任公司 | A kind of crane, which rises, puts anti-roll device |
| CN211235562U (en) * | 2019-11-21 | 2020-08-11 | 武汉普渡生物医药有限公司 | Clinical experiment detection viewing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585099A (en) * | 2021-09-28 | 2021-11-02 | 中交投资南京有限公司 | Deviation monitoring system for double-span synchronous tension bridge girder erection machine and construction method for reinforced concrete composite bridge |
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Application publication date: 20201225 |
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