CN111119068A - Closure system for main beam of arch-tower cable-stayed bridge and construction method thereof - Google Patents
Closure system for main beam of arch-tower cable-stayed bridge and construction method thereof Download PDFInfo
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- CN111119068A CN111119068A CN202010027238.9A CN202010027238A CN111119068A CN 111119068 A CN111119068 A CN 111119068A CN 202010027238 A CN202010027238 A CN 202010027238A CN 111119068 A CN111119068 A CN 111119068A
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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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
Abstract
The invention discloses a closure system for a main beam of an arch tower cable-stayed bridge and a construction method thereof, wherein an arch tower is vertically arranged on a middle bridge pier of the cable-stayed bridge, and a bracket system and the main beam are arranged on two sides of the arch tower; the closure system comprises a pushing device, a transverse adjusting device, a vertical adjusting device and a guiding device, wherein one end of the transverse adjusting device is connected to the side edge of the arch tower, and the other end of the transverse adjusting device is connected to the corresponding side face of the corresponding main beam; one end of the vertical adjusting device is connected to the top of the arch tower, and the other end of the vertical adjusting device is connected to the upper end face of the corresponding main beam; the guide devices are installed on two sides of the main beam closure opening in a set; the pushing devices are arranged in the support system and on the tops of the piers on the side piers, and can drive the main beam and the back buckling tower to integrally move along the longitudinal direction of the support system, so that the left main beam and the right main beam are symmetrically closed by taking the arch tower as a center; the transverse adjusting device and the vertical adjusting device can drive the end surfaces of the left main beam and the right main beam to align by the coordinated action; the guide device can guide the left main beam and the right main beam to close and lock.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of bridge engineering, and particularly relates to a closure system and a construction method for a main beam of an arch-tower cable-stayed bridge.
[ background of the invention ]
The arch tower cable-stayed bridge has stronger competitiveness when the existing road is crossed at a small angle and low clearance, the main beam of the bridge type is usually constructed by adopting methods of support, pushing, hoisting and the like, and particularly the pushing of the main beam becomes the first choice when the traffic transportation of roads or railways under the bridge is busy.
At present, a pushing auxiliary matched cutting closure process is generally adopted for bidirectional pushing of a main beam, namely, the line shape of a steel beam in the pushing process is adjusted through a pushing device and a vertical jack of an auxiliary pier top, the unstressed blanking length of a closure section is calculated after the pushing is in place, a factory is matched and prefabricated, meanwhile, a traction device is arranged at the closure opening to adjust the state of the closure opening, the position and the shape of the closure section are adjusted by adopting a method of adjusting the width of a closure seam by seam, and the closure is welded.
But the defect is that the line shape is not easy to control in the pushing process, and the transverse deviation rectifying capability of the curved beam is not enough; the adjustment requirement on the closure state is high, active adjustment measures are lacked in closure joint matching, the closure section needs to adjust the width of the closure joint seam by seam, two seams are synchronously welded, the construction time is long, and the construction difficulty is high; meanwhile, the hoisting space of the arched main beam closure section of the arched pylon cable-stayed bridge is limited, the construction organization difficulty is higher, the closure section matched cutting changes the size of a component and the shape of a stress-free line, certain influence is caused on the bridge forming structure and stress, and the quality assurance degree is lower.
Aiming at the problems that the main beam line shape is not easy to control, especially the transverse deviation rectifying capacity of a curved beam is insufficient, the adjustment difficulty of the closure port posture is high, the active closure port adjusting measure is lacked and the like in the current bidirectional pushing construction process of the main beam of the arch-pylon cable-stayed bridge, an efficient adjusting system and a high-precision closure method suitable for the main beam of the arch-pylon cable-stayed bridge are expected, so that the construction time is shortened, the construction difficulty is reduced, and the construction quality is improved.
In view of the above, it is an urgent problem in the art to overcome the above-mentioned drawbacks of the prior art.
[ summary of the invention ]
The technical problems to be solved by the invention are as follows: aiming at the problems that the main beam line shape is not easy to control in the current bidirectional pushing construction process of the main beam of the arch-tower cable-stayed bridge, the transverse deviation rectifying capability of a curve type main beam is not enough, the adjustment difficulty of the closure port posture is high, and active closure port adjusting measures are lacked.
The invention achieves the above purpose by the following technical scheme:
in a first aspect, a closure system for a main beam of an arch-type cable-stayed bridge is provided, wherein an arch-type tower is vertically arranged on a middle bridge pier of the cable-stayed bridge, support systems are arranged on bridge piers on two sides of the arch-type tower, and the main beam is assembled on the support systems; the closure system comprises a pushing device, a transverse adjusting device, a vertical adjusting device and a guiding device, wherein the main beam comprises a left main beam and a right main beam which are arranged at two sides of the arch tower, each main beam is correspondingly provided with a set of back buckling tower and back buckling cables, and the back buckling towers are vertically arranged on the main beams; the buckling back cable penetrates through the top of the buckling back tower, and two ends of the buckling back cable are anchored on the inner end surface of the main beam, so that the main beam is hung on the corresponding buckling back tower; one end of the transverse adjusting device is connected to the side edge of the arch tower, and the other end of the transverse adjusting device is connected to the corresponding side surface of the corresponding main beam; one end of the vertical adjusting device is connected to the top of the arch tower, and the other end of the vertical adjusting device is connected to the upper end face of the corresponding main beam; the guide devices are installed on two sides of a main beam closure opening in a set, and specifically, the side surfaces of the ends, close to the arch tower, of the left main beam and the right main beam; the pushing device is arranged in the support system and on the top of the side pier, and can drive the main beam and the back-buckling tower to move integrally along the longitudinal direction of the support system, so that the left main beam and the right main beam are symmetrically closed by taking the arch tower as a center, a pushing component of the pushing device is arranged below the main beam, and a thrust component of the pushing device is arranged on the top of the side pier; the transverse adjusting device and the vertical adjusting device cooperatively act to drive the end faces of the left main beam and the right main beam to align, so that three-dimensional pushing deviation rectification of height, longitudinal angle and rotation angle is realized; the guiding device can guide the left main beam and the right main beam to close and lock, namely the high-precision butt joint and closure of the main beams are realized through the coordination action of the pushing device, the transverse adjusting device, the vertical adjusting device and the guiding device.
Further, the transverse adjusting device comprises a transverse pulling rope and a transverse pulling rope device; two transverse cable pulling devices are arranged on each side of the tower root of the arch tower and are divided into a left transverse cable pulling device and a right transverse cable pulling device, and each transverse cable pulling device is connected with a transverse cable; the transverse guy cable connects the main beam with the transverse guy cable pulling device, and can be adjusted when the transverse guy cable pulling device acts, the transverse guy cable can drive the corresponding main beam to move transversely, so as to adjust the transverse position of the main beam, specifically, the transverse guy cable extending out of the left transverse guy cable pulling device on the left side arch tower is connected to the left side surface of the left main beam, and the transverse guy cable extending out of the right transverse guy cable pulling device on the left side arch tower is connected to the left side surface of the right main beam; a transverse cable extending out of a left transverse cable pulling device on the right side arch tower is connected to the right side face of the left main beam, and a transverse cable extending out of a right transverse cable pulling device on the right side arch tower is connected to the right side face of the right main beam.
Furthermore, the vertical adjusting device comprises a longitudinal cable and a longitudinal cable pulling device; two longitudinal cable pulling devices are arranged on each side of the top of the arch tower and are divided into a left longitudinal cable pulling device and a right longitudinal cable pulling device, and each longitudinal cable pulling device is connected with a longitudinal cable; the longitudinal guy cable connects the main beam with the longitudinal guy cable pulling device, when the longitudinal guy cable pulling device acts, the longitudinal guy cable can be folded, the longitudinal guy cable can drive the corresponding main beam to move up and down, thereby adjusting the height of the main beam, specifically, the longitudinal guy cable extending out of the left longitudinal guy cable pulling device on the left side arch tower is connected to the left upper end surface of the left main beam, and the longitudinal guy cable extending out of the right longitudinal guy cable pulling device on the left side arch tower is connected to the left upper end surface of the right main; the longitudinal guy cable extending from the left longitudinal guy cable device on the right side arch tower is connected to the upper end surface of the right side of the left main beam, and the longitudinal guy cable extending from the right longitudinal guy cable device on the right side arch tower is connected to the upper end surface of the right side of the right main beam.
Furthermore, the pushing device comprises a roller device and a jack, wherein the roller device is transversely arranged below the main beam in a cushioning mode, so that the moving resistance of the main beam can be reduced; the jack is arranged on the pier top of the side pier and can jack the main beam and push the main beam forwards.
Furthermore, the roller device is a roller or a rolling ball, and the roller device is made of hard plastic, wood, stone or metal.
Furthermore, the guide device is a wedge-shaped guide block and comprises a female guide block and a male guide block which are arranged in a set; the female guide block is arranged on the end face side of the left main beam in a bolt connection or welding mode, the male guide block is arranged on the end face side of the right main beam in a bolt connection or welding mode, and the mounting positions of the female guide block and the male guide block in each set of guide blocks correspond to each other, so that the female guide block and the male guide block are conveniently butted.
Further, the female guide block and the male guide block are separately arranged on a top plate, a web plate and a bottom plate of the main beam.
Further, the main beam is a steel box beam, a concrete beam or a combined beam.
In a second aspect, a construction method for the closure system is provided, wherein the arch tower spans an existing road or railway line, after the arch tower is constructed, main beams are assembled on two sides of the existing road or railway line by adopting a support system, and then the main beams are pushed to the midspan until the closure system is closed, and the construction method comprises the following steps.
The method comprises the following steps: and (5) setting a pier and a support system to complete the construction of the arch tower.
Step two: the left main beam and the right main beam are respectively built in the middle of the support systems on the two sides of the arch tower, the back buckling tower and the back buckling cables are respectively built on the left main beam and the right main beam, specifically, the back buckling tower and the back buckling cables 7 are temporary building equipment, the back buckling tower and the back buckling cables are dismantled after the main beam and the arch tower are provided with the firm stay cables, and the back buckling tower and the back buckling cables are used for balancing the weight of a cantilever in the main beam pushing process.
Step three: setting a horizontal adjusting device: a left transverse cable pulling device and a right transverse cable pulling device are arranged at the tower root end on the left side of the arch tower, and a left transverse cable pulling device and a right transverse cable pulling device are arranged at the right side of the arch tower corresponding to the tower root end; each transverse cable pulling device is provided with a transverse cable;
step four: setting a vertical adjusting device: a left longitudinal cable pulling device and a right longitudinal cable pulling device are arranged at the top end of the left tower of the arch tower, a left longitudinal cable pulling device and a right longitudinal cable pulling device are arranged at the right side of the arch tower corresponding to the top end of the tower, and each longitudinal cable pulling device is provided with a longitudinal cable;
step five: arranging a pushing device: and a jack is arranged on the side pier, the main beam is jacked up by the jack, and a roller device is transversely arranged below the main beam.
Step six: arranging a guide device: a plurality of sets of guide blocks are arranged on the corresponding end surfaces of the left main beam and the right main beam, a female guide block is arranged on the end surface side of the left main beam close to the arch tower and is rigidly fastened through a bolt connection or welding mode, and a male guide block is arranged on the end surface side of the right main beam close to the arch tower and is rigidly fastened through a bolt connection or welding mode; each set of female guide block corresponds to the mounting position of the male guide block.
Step seven: preliminary top pushes away the girder: starting a pushing device, pushing a main beam to move longitudinally along a support system through a jack, and enabling a left main beam and a right main beam to symmetrically approach each other by taking an arch tower as a center, wherein the main beams drive a back buckling tower to synchronously move through a back buckling cable, so that the main beams and the back buckling tower integrally move; in the process that the left main beam and the right main beam symmetrically approach each other by taking the arch tower as a center, the roller device at the rear part can be moved to the front part, so that the roller devices are uniformly paved below the pressure bearing surface close to the support system when the main beams advance.
Step eight: connect horizontal transfer device and vertical transfer device: when the end face distance between the left main beam and the right main beam is equal to a specified threshold value of 1-50m, the horizontal adjusting device and the vertical adjusting device are completely connected to the main beam, the main beam and the horizontal cable pulling device are connected through a horizontal cable, and the main beam and the vertical cable pulling device are connected through a vertical cable, specifically:
a transverse cable extending out of a left transverse cable pulling device on the left side arch tower is connected to the left side surface of the left main beam, and a transverse cable extending out of a right transverse cable pulling device on the left side arch tower is connected to the left side surface of the right main beam; a transverse cable extending out of a left transverse cable pulling device on the right side arch tower is connected to the right side surface of the left main beam, and a transverse cable extending out of a right transverse cable pulling device on the right side arch tower is connected to the right side surface of the right main beam;
a longitudinal guy rope extending from a left longitudinal guy rope device on the left arch tower is connected to the upper end surface of the left side of the left main beam, and a longitudinal guy rope extending from a right longitudinal guy rope device on the left arch tower is connected to the upper end surface of the left side of the right main beam; the longitudinal guy cable extending from the left longitudinal guy cable device on the right side arch tower is connected to the upper end surface of the right side of the left main beam, and the longitudinal guy cable extending from the right longitudinal guy cable device on the right side arch tower is connected to the upper end surface of the right side of the right main beam.
Step nine: closing and rectifying deviation: after the left main beam and the right main beam are pushed and translated, the horizontal adjusting device and the vertical adjusting device are started according to the deviation of the height, the longitudinal angle and the rotating angle between the left main beam and the right main beam, and the left main beam and the right main beam are aligned and level.
Step ten: guiding and closing: after the left main beam and the right main beam are corrected, the pushing device is started to enable the left main beam and the right main beam to be continuously and symmetrically closed by taking the arch tower as a center, closing and correcting are timely and gradually carried out according to the step nine, the pushing device, the transverse adjusting device and the vertical adjusting device are repeatedly adjusted until friendly butt joint of the female guide block and the male guide block is achieved, after all the male guide blocks are embedded into the female guide block, longitudinal correction and transverse correction are confirmed to be completed, and then the pushing device is used for achieving tight closing of the main beams on two sides.
Step eleven: locking the closure opening: the closure opening is locked through a connecting plate and a bolt, and then the butt joints are welded one by one to complete rigid closure.
Step twelve: ending the project: and hanging the main beam on the arch tower through the stay cable, and after the structure of the arch tower cable-stayed bridge is stable, removing the pushing device, the transverse adjusting device, the vertical adjusting device, the back-buckling tower, the back-buckling cable and the bracket system according to the correct procedures to carry out the next procedure.
Furthermore, in the above steps, the transverse cable drawing device and the longitudinal cable drawing device act alternately when exerting force, and the power of each device should be properly adjusted according to the target moving position, so as to prevent damage caused by inertia impact of the device due to excessive force.
Compared with the prior art, the invention has the following advantages.
1. And pushing and correcting the main beams on the two sides by using a transverse adjusting device, a vertical adjusting device and a pushing device of the arch-pylon cable-stayed bridge, roughly adjusting the closure port postures of the main beams on the two sides, and realizing high-precision butt joint closure of the two main beams by using a wedge-shaped guide block of the closure port.
2. The closure method does not need temporary structures such as closure balance weight, closure stiff frameworks and the like, has simple structure and saves the manufacturing cost; the transverse adjusting device and the vertical adjusting device improve the linear adjusting efficiency of the main beam, and have good adaptability to the adjustment of the transverse displacement of the curved main beam; the wedge-shaped guide device of the closure opening actively adjusts the closure surface posture, high-precision butt joint is achieved, manual intervention is reduced, construction control factors are single, construction is simple, and work efficiency is improved.
3. The horizontal adjusting device and the vertical adjusting device are arranged on the arch tower, and a pulling force assisting pushing device can be provided to pull the left main beam and the right main beam to the arch tower simultaneously, so that the pushing translation efficiency is further improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a perspective view of a main beam of a cable-stayed bridge according to the present embodiment before closure after a pushing device is provided.
Fig. 2 is a perspective view of the left main beam and the right main beam in the embodiment before the lateral adjusting device, the vertical adjusting device and the guiding device are arranged after the pushing device pushes the arch tower.
Fig. 3 is an enlarged perspective view of the middle part of the left main beam and the right main beam in the embodiment before the lateral adjusting device, the vertical adjusting device and the guiding device are arranged after the pushing device pushes the arch tower.
Fig. 4 is a front view of the left main beam and the right main beam in the embodiment before the lateral adjusting device, the vertical adjusting device and the guiding device are arranged after the pushing devices push the arch tower.
Fig. 5 is a left side view of the left main beam and the right main beam of the present embodiment before the lateral adjusting device, the vertical adjusting device and the guiding device are arranged after being pushed to the arch tower by the pushing device.
Fig. 6 is a top view of the left main beam and the right main beam in the embodiment before the lateral adjusting device, the vertical adjusting device and the guiding device are arranged after the pushing devices are pushed to the arch tower.
Fig. 7 is a perspective view of the left main beam, the right main beam and the guiding device in this embodiment when they are isolated before closure.
Fig. 8 is a perspective view of the left main beam and the right main beam after closure is completed in the embodiment.
Fig. 9 is a partially enlarged perspective view of the left main beam and the right main beam of the present embodiment after closure.
In the figure: 1-a stent system; 5-a guiding device; 6-buckling a back tower; 7-buckling a back cable; 201-a roller device; 301-cross pull cable; 302-a transverse cable pulling device; 401-longitudinal cable; 402-a longitudinal cable puller; 501-a female guide block; 502-male guide block.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The invention will be described in detail below with reference to the figures and examples.
In this embodiment, the horizontal adjusting device includes a horizontal pulling cable 301 and a horizontal pulling cable device 302; two transverse cable drawing devices 302 are arranged on each side of the tower root of the arch tower and are divided into a left transverse cable drawing device 302 and a right transverse cable drawing device 302, each transverse cable drawing device 302 is connected with a transverse cable 301, the main beam is connected with the transverse cable drawing devices 302 through the transverse cables 301, the transverse cables 301 can be adjusted when the transverse cable drawing devices 302 act, the transverse cables 301 can drive the corresponding main beams to move transversely, and therefore the transverse position of the main beam is adjusted, specifically, the transverse cables 301 extending out of the left transverse cable drawing devices 302 on the left arch tower are connected to the left side face of the left main beam, and the transverse cables 301 extending out of the right transverse cable drawing devices 302 on the left arch tower are connected to the left side face of the right main beam; a cross cable 301 extending from a left bridle 302 on the right side pylon is attached to the right side of the left main beam and a cross cable 301 extending from a right bridle 302 on the right side pylon is attached to the right side of the right main beam.
In this embodiment, the vertical adjustment device includes a vertical cable 401 and a vertical cable puller 402; two longitudinal cable pulling devices 402 are arranged on each side of the top of the arch tower and are divided into a left longitudinal cable pulling device 402 and a right longitudinal cable pulling device 402, and each longitudinal cable pulling device 402 is connected with a longitudinal cable 401; the longitudinal cable 401 connects the main beam with the longitudinal cable pulling device 402, when the longitudinal cable pulling device 402 acts, the longitudinal cable 401 can be folded, the longitudinal cable 401 can drive the corresponding main beam to move up and down, thereby adjusting the height of the main beam, specifically, the longitudinal cable 401 extending out of the left longitudinal cable pulling device 402 on the left side arch tower is connected to the left upper end surface of the left main beam, and the longitudinal cable 401 extending out of the right longitudinal cable pulling device 402 on the left side arch tower is connected to the left upper end surface of the right main beam; a longitudinal guy rope 401 extending from a left longitudinal guy rope device 402 on the right side arch tower is connected to the upper end surface of the right side of the left main beam, and a longitudinal guy rope 401 extending from a right longitudinal guy rope device 402 on the right side arch tower is connected to the upper end surface of the right side of the right main beam;
in this embodiment, the pushing device includes a roller 201 and a jack, and the roller 201 is transversely disposed under the main beam to reduce the moving resistance of the main beam; the jack is arranged on the pier top of the side pier and can jack the main beam and push the main beam to move forwards.
In this embodiment, the roller device 201 is a roller, and the roller device 201 is made of hard wood.
In this embodiment, the guiding device 5 is a wedge-shaped guiding block, and includes a female guiding block 501 and a male guiding block 502 which are arranged in a set; the female guide block 501 is connected to the end face side of the left main beam through a bolt, the male guide block 502 is connected to the end face side of the right main beam through a bolt, and the mounting positions of the female guide block 501 and the male guide block 502 in each set of guide blocks correspond to each other, so that the female guide block 501 and the male guide block 502 can be conveniently butted.
In this embodiment, the female guide block 501 and the male guide block 502 are separately disposed on the top plate, the web plate and the bottom plate of the main beam.
In this embodiment, the main beam is a steel box beam, a concrete beam or a composite beam.
Embodiment 2 after providing the closure system for the main beam of the arch-pylon cable-stayed bridge described in embodiment 1, an embodiment of the present invention also provides a construction method for the closure system for the main beam of the arch-pylon cable-stayed bridge, and the closure system constructed in this embodiment can directly utilize the closure system described in embodiment 1.
In this embodiment, a construction method of a closure system for a main beam of an arch-type cable-stayed bridge is provided, in which an arch-type tower spans an existing road or railway line, after the construction of the arch-type tower is completed, the main beam is assembled at two sides of the existing road or railway line by using a support system 1, and then the main beam is pushed to the midspan until closure, and the construction method includes the following steps.
The method comprises the following steps: and (5) setting a pier and a support system 1 to complete the construction of the arch tower.
Step two: respectively building a left main beam and a right main beam in the middle of the support systems 1 at two sides of the arch tower, wherein the left main beam and the right main beam are both 80m long and 20m wide, respectively building a set of back-buckling tower 6 and a set of back-buckling cable 7 on the left main beam and the right main beam, and particularly, the back-buckling tower 6 and the back-buckling cable 7 are temporary building equipment, and are dismantled after a firm stay cable is arranged between the main beam and the arch tower, and the back-buckling tower 6 and the back-buckling cable 7 are used for balancing the weight of a cantilever in the main beam pushing process; specifically, the arch tower is 80m in height, 50m in width and 5m in thickness, and the back-off tower 6 is 50m in height and 30m in width.
Step three: setting a horizontal adjusting device: a left transverse cable pulling device 302 and a right transverse cable pulling device 302 are arranged at the tower root end on the left side of the arch tower, and a left transverse cable pulling device 302 and a right transverse cable pulling device 302 are arranged at the right side of the arch tower corresponding to the tower root end; one cross cable 301 is provided for each cross stay 302.
Step four: setting a vertical adjusting device: a left longitudinal rope pulling device 402 and a right longitudinal rope pulling device 402 are arranged at the top end of the left side of the arch tower, a left longitudinal rope pulling device 402 and a right longitudinal rope pulling device 402 are arranged at the top end of the right side of the arch tower corresponding to the top end of the arch tower, and each longitudinal rope pulling device 402 is provided with a longitudinal rope 401.
Step five: arranging a pushing device: jacks are arranged on the side bridge piers, the main beams and the buckling back tower 6 are jacked up through the jacks, and roller devices 201 are transversely arranged below the main beams and the buckling back tower 6 in a cushioning mode.
Step six: setting a guide device 5: a plurality of sets of guide blocks are arranged on the corresponding end surfaces of the left main beam and the right main beam, a female guide block 501 is arranged on the end surface side of the left main beam close to the arch tower and is rigidly fastened through a bolt connection mode, and a male guide block 502 is arranged on the end surface side of the right main beam close to the arch tower and is rigidly fastened through a bolt connection mode; each set of female guide blocks 501 corresponds to the male guide blocks 502 in installation position.
Step seven: preliminary top pushes away the girder: starting a pushing device, pushing the main beam to move longitudinally along the support system 1 through a jack, and enabling the left main beam and the right main beam to symmetrically approach each other by taking the arch tower as a center, wherein the main beam drives the back-buckling tower 6 to move synchronously through the back-buckling cable 7, so that the main beam and the back-buckling tower 6 move integrally; in the process that the left main beam and the right main beam symmetrically approach each other by taking the arch tower as the center, the roller 201 at the rear part can be moved to the front part, so that when the main beams advance, the roller 201 is uniformly paved below the pressure bearing surface close to the support system 1.
Step eight: connect horizontal transfer device and vertical transfer device: when the end face distance between the left main beam and the right main beam is equal to a specified threshold value of 30m, the horizontal adjusting device and the vertical adjusting device are completely connected to the main beam, the main beam and the horizontal cable pulling device 302 are connected through the horizontal cable 301, and the main beam and the vertical cable pulling device 402 are connected through the vertical cable 401, specifically:
a transverse cable 301 extending out of a left transverse cable pulling device 302 on the left side arch tower is connected to the left side surface of the left main beam, and a transverse cable 301 extending out of a right transverse cable pulling device 302 on the left side arch tower is connected to the left side surface of the right main beam; a cross cable 301 extending from a left bridle 302 on the right side pylon is attached to the right side of the left main beam and a cross cable 301 extending from a right bridle 302 on the right side pylon is attached to the right side of the right main beam.
A longitudinal guy rope 401 extending from a left longitudinal guy rope device 402 on the left arch tower is connected to the upper end surface of the left side of the left main beam, and a longitudinal guy rope 401 extending from a right longitudinal guy rope device 402 on the left arch tower is connected to the upper end surface of the left side of the right main beam; a longitudinal guy wire 401 extending from a left guy wire device 402 on the right side arch tower is connected to the upper end surface of the right side of the left main beam, and a longitudinal guy wire 401 extending from a right guy wire device 402 on the right side arch tower is connected to the upper end surface of the right side of the right main beam.
Step nine: closing and rectifying deviation: after the left main beam and the right main beam are pushed and translated, the following deviation rectification is required in the closure process:
firstly, the method comprises the following steps: the end surfaces of the closure surfaces of the left main beam and the right main beam are horizontal but are uneven, so that the height difference exists, and according to the height difference, the longitudinal cable pulling device 402 is started, and the height difference between the left main beam and the right main beam is reduced through the vertical adjusting device;
secondly, the method comprises the following steps: the end surfaces of the closure surfaces of the left main beam and the right main beam are tidy but not flat at a longitudinal angle, and according to the longitudinal angle, the longitudinal cable pulling device 402 is started and the back cable 7 is properly adjusted to ensure that the bridge surfaces of the left main beam and the right main beam are level;
thirdly, the method comprises the following steps: the distance between the end surface of one side at the closure surface of the left main beam and the right main beam and the distance between the end surface of the opposite side are not equal to form a V-shaped crack, and according to the situation, the transverse cable pulling device 302 is started, and the V-shaped crack is eliminated through the transverse adjusting device to realize longitudinal alignment;
fourthly: the end surfaces of the closure surfaces of the left main beam and the right main beam are twisted to form a lateral angle; according to the situation, the longitudinal cable pulling device 402 is started, the height of the left side and the height of the right side of the main beam are adjusted through the vertical adjusting device, and the lateral horizontal between the left main beam and the right main beam is kept.
Step ten: guiding and closing: after the left main beam and the right main beam are rectified, the pushing device is started to enable the left main beam and the right main beam to be continuously and symmetrically closed by taking the arch tower as a center, closing and rectifying are carried out step by step in due time, the pushing device, the transverse regulating device and the vertical regulating device are repeatedly regulated until friendly butt joint of the female guide block 501 and the male guide block 502 is realized, after all the male guide blocks 502 are embedded into the female guide block 501, longitudinal rectification and transverse rectification are confirmed to be finished, and then the pushing device is used for realizing tight closing of the main beams on two sides.
Step eleven: locking the closure opening: the closure opening is locked through a connecting plate and a bolt, and then the butt joints are welded one by one to complete rigid closure.
Step twelve: ending the project: and hanging the main beam on the arch tower through the stay cable, and after the structure of the arch tower cable-stayed bridge is stable, removing the pushing device, the transverse adjusting device, the vertical adjusting device, the back-buckling tower, the back-buckling cable and the bracket system 1 according to the correct procedures to carry out the next procedure.
Further, during construction, the transverse cable pulling device 302 and the longitudinal cable pulling device 402 act alternately when exerting force, and the power of each device should be properly adjusted according to the target moving position to prevent damage caused by inertial impact of the device due to excessive force.
Further, in the embodiment, the size and the structural strength of the corresponding components of the thrusting device, the transverse adjusting device, the vertical adjusting device and the guiding device 5 are related to the size and the weight of the main beam, and the thrusting device, the transverse adjusting device, the vertical adjusting device and the guiding device 5 are designed to have enough strength to support the translation, the fixation and the adjustment of the main beam, so that 100% of safety margin is reserved, and the risk of damage caused by sudden stress change due to shaking or impact during operation in the embodiment is avoided.
The method can be applied to the design and construction of the cross-line arch tower cable-stayed bridge, and has good popularization and application prospects.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art. The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A closure system for a main beam of an arch tower cable-stayed bridge is characterized in that an arch tower is vertically arranged on a middle bridge pier of the cable-stayed bridge, support systems (1) are arranged on bridge piers on two sides of the arch tower, and the main beam is assembled on the support systems (1);
it is characterized in that the closure system comprises a pushing device, a transverse adjusting device, a vertical adjusting device and a guiding device (5),
the main beams comprise a left main beam and a right main beam which are arranged at two sides of the arch tower, each main beam is correspondingly provided with a set of back buckling tower (6) and a back buckling cable (7), and the back buckling towers (6) are vertically arranged on the main beams; the buckling back cable (7) penetrates through the top of the buckling back tower (6), and two ends of the buckling back cable are anchored on the inner end surface of the main beam, so that the main beam is hung on the corresponding buckling back tower (6);
one end of the transverse adjusting device is connected to the side edge of the arch tower, and the other end of the transverse adjusting device is connected to the corresponding side surface of the corresponding main beam;
one end of the vertical adjusting device is connected to the top of the arch tower, and the other end of the vertical adjusting device is connected to the upper end face of the corresponding main beam;
the guide devices (5) are installed on two sides of the main beam closure opening in a complete set;
the pushing devices are longitudinally arranged in the support system and on the tops of the piers of the side piers and abut against the main beam and the buckling tower;
and the guide device (5) guides the left main beam and the right main beam to close and lock.
2. The closure system of claim 1,
the transverse adjusting device comprises a transverse pulling rope (301) and a transverse pulling rope device (302); each side of the arch tower root is provided with two transverse cable drawing devices (302) which are divided into a left transverse cable drawing device (302) and a right transverse cable drawing device (302), and each transverse cable drawing device (302) is connected with a transverse cable (301); the transverse cable (301) connects the main beam with the transverse cable pulling device (302), the transverse cable (301) can be adjusted when the transverse cable pulling device (302) acts, and the transverse cable (301) can drive the corresponding main beam to transversely move so as to adjust the transverse position of the main beam.
3. The closure system of claim 2,
the vertical adjusting device comprises a longitudinal pull rope (401) and a longitudinal rope pulling device (402); each side of the top of the arch tower is provided with two longitudinal cable drawing devices (402) which are divided into a left longitudinal cable drawing device (402) and a right longitudinal cable drawing device (402), and each longitudinal cable drawing device (402) is connected with a longitudinal cable (401); the longitudinal cable (401) connects the main beam with the longitudinal cable pulling device (402), the longitudinal cable (401) can be folded when the longitudinal cable pulling device (402) acts, and the longitudinal cable (401) drives the corresponding main beam to move up and down, so that the height of the main beam is adjusted.
4. Closure system according to claim 3, wherein said traversing means comprise a traversing cable (301) and a traversing cable puller (302); each side of the arch tower root is provided with two transverse cable pulling devices (302) which are divided into a left transverse cable pulling device (302) and a right transverse cable pulling device (302), and each transverse cable pulling device (302) is connected with a transverse cable (301) capable of driving the corresponding main beam to move transversely; the transverse guy cable (301) connects the main beam with the transverse guy cable pulling device (302).
5. The closure system according to claim 4, wherein the roller device (201) is a roller or a ball, and the roller device (201) is made of hard plastic, wood, stone or metal.
6. Closure system according to claim 5, wherein said guiding means (5) is a wedge-shaped guide block comprising a set of a female guide block (501) and a male guide block (502); wherein female guide block (501) set up in left girder terminal surface side through bolted connection or welding mode, public guide block (502) set up in right girder terminal surface side through bolted connection or welding mode, female guide block (501) and public guide block (502) mounted position correspond in each set of guide block, are convenient for dock between female guide block (501) and public guide block (502).
7. Closure system according to claim 6, wherein the female guide block (501) and the male guide block (502) are provided separately on the top, web and bottom plate of the main beam.
8. The closure system of claim 7, wherein the main beam is a steel box beam, a concrete beam, or a composite beam.
9. A construction method for the closure system of claim 8, wherein the arch tower spans an existing road or railway line, and after the arch tower is constructed, main beams are assembled at two sides of the existing road or railway line by using the support systems (1) and then pushed to the closure towards the midspan, and the construction method comprises the following steps:
the method comprises the following steps: arranging a pier and a support system (1) to complete the construction of the arch tower;
step two: a left main beam and a right main beam are respectively built in the middle of the support systems (1) at the two sides of the arch tower, and a set of back buckling tower (6) and a back buckling cable (7) are respectively built on the left main beam and the right main beam;
step three: setting a horizontal adjusting device: a left transverse cable pulling device (302) and a right transverse cable pulling device (302) are arranged at the tower root end on the left side of the arch tower, and a left transverse cable pulling device (302) and a right transverse cable pulling device (302) are arranged at the right side of the arch tower corresponding to the tower root end; each transverse cable pulling device (302) is provided with a transverse cable (301);
step four: setting a vertical adjusting device: a left longitudinal rope pulling device (402) and a right longitudinal rope pulling device (402) are arranged at the top end of the left side of the arch tower, a left longitudinal rope pulling device (402) and a right longitudinal rope pulling device (402) are arranged at the top end of the right side of the arch tower corresponding to the top end of the arch tower, and each longitudinal rope pulling device (402) is provided with a longitudinal rope (401);
step five: arranging a pushing device: a jack is arranged on the side pier, the main beam is jacked up by the jack, and a roller device (201) is transversely arranged below the main beam;
step six: -providing a guiding device (5): a plurality of sets of guide blocks are arranged on the corresponding end surfaces of the left main beam and the right main beam, a female guide block (501) is arranged on the end surface side of the left main beam close to the arch tower and is rigidly fastened through a bolt connection or welding mode, and a male guide block (502) is arranged on the end surface side of the right main beam close to the arch tower and is rigidly fastened through a bolt connection or welding mode; each set of female guide block (501) corresponds to the male guide block (502) in installation position;
step seven: preliminary top pushes away the girder: starting a pushing device, pushing a main beam to move longitudinally along the support system (1) through a jack, and enabling a left main beam and a right main beam to symmetrically approach each other by taking the arch tower as a center, wherein the main beams drive the back-buckling tower (6) to move synchronously through a back-buckling cable (7), so that the main beams and the back-buckling tower (6) move integrally; in the process that the left main beam and the right main beam symmetrically approach each other by taking the arch tower as the center, the rear roller device (201) can be moved to the front, so that when the main beams advance, the roller devices (201) are uniformly paved below the pressure bearing surface close to the support system (1);
step eight: connect horizontal transfer device and vertical transfer device: when the end face distance between the left main beam and the right main beam is equal to a specified threshold value, connecting the main beam with a transverse cable (302) by using a transverse cable (301), and connecting the main beam with a longitudinal cable (402) by using a longitudinal cable (401);
step nine: closing and rectifying deviation: after the left main beam and the right main beam are pushed and translated, the horizontal adjusting device and the vertical adjusting device are started according to the deviation of the height, the longitudinal angle and the rotating angle between the left main beam and the right main beam, and the left main beam and the right main beam are aligned and level.
Step ten: guiding and closing: after the left main beam and the right main beam are corrected, the pushing device is started to enable the left main beam and the right main beam to be continuously and symmetrically closed by taking the arch tower as a center, closing and correction are conducted step by step in due time according to the ninth step, the pushing device, the transverse adjusting device and the vertical adjusting device are adjusted repeatedly until friendly butt joint of the female guide block (501) and the male guide block (502) is achieved, after all the male guide blocks (502) are embedded into the female guide block (501), longitudinal correction and transverse correction are confirmed to be completed, and then the pushing device is used for achieving tight closing of the main beams on two sides.
Step eleven: locking the closure opening: the closure opening is locked through a connecting plate and a bolt, and then the butt joints are welded one by one to complete rigid closure.
Step twelve: ending the project: and hanging the main beam on the arch tower through the stay cable, and after the structure of the arch tower cable-stayed bridge is stable, removing the pushing device, the transverse adjusting device, the vertical adjusting device, the back-buckling tower, the back-buckling cable and the bracket system (1) according to the correct procedures to carry out the next procedure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027238.9A CN111119068A (en) | 2020-01-10 | 2020-01-10 | Closure system for main beam of arch-tower cable-stayed bridge and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027238.9A CN111119068A (en) | 2020-01-10 | 2020-01-10 | Closure system for main beam of arch-tower cable-stayed bridge and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733709A (en) * | 2020-05-18 | 2020-10-02 | 中铁三局集团有限公司 | Method for closing arched cable-stayed bridge beam in vertical rotation and downward rotation and bridge structure used in cooperation with method |
-
2020
- 2020-01-10 CN CN202010027238.9A patent/CN111119068A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733709A (en) * | 2020-05-18 | 2020-10-02 | 中铁三局集团有限公司 | Method for closing arched cable-stayed bridge beam in vertical rotation and downward rotation and bridge structure used in cooperation with method |
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