CN-121976454-A - Open bridge guiding device adapting to temperature difference deformation and arrangement method

CN121976454ACN 121976454 ACN121976454 ACN 121976454ACN-121976454-A

Abstract

The invention provides an open bridge guiding device adapting to temperature difference deformation and an arrangement method, and belongs to the field of water transportation and bridge engineering. The device comprises an opening bridge, a bridge tower, a track embedded part and a guiding device. The guiding device comprises three limiting types of XY direction, X direction and Y direction, and is composed of a high polymer self-lubricating limiting sliding block and a guiding frame. The core arrangement method comprises the steps of arranging an XY bidirectional limiting device at a first bridge tower to serve as a temperature difference deformation starting fixed point, arranging a Y-direction limiting device at a second bridge tower to allow X-direction deformation, arranging an X-direction limiting device at a third bridge tower to allow Y-direction deformation, and arranging no constraint at a fourth bridge tower to release maximum deformation. According to the invention, the high-performance self-lubricating sliding blocks are used at the key parts through differential constraint, so that the problems of expansion and buckling deformation of the large-span opening bridge caused by temperature difference are effectively solved, the adaptability, running stability and long-term durability of the guide system are obviously improved, and the maintenance cost and safety risk are reduced.

Inventors

JIN LIAO
YU QINGKUI
YAN RUOPENG
WANG DI
WU DI
HU JIXIANG
WANG KE
XIANG MINGFENG
SONG TIANTIAN
LIAO LEKANG

Assignees

长江勘测规划设计研究有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260306

Claims (10)

1. An opening bridge guide adapted to temperature differential deformation, comprising: The bridge comprises an opening bridge (101), at least four bridge towers (102) which are longitudinally arranged at intervals along the bridge, track embedded parts (103) which are arranged on part of the bridge towers (102), and guide devices (104) which are arranged on the opening bridge (101) and matched with the track embedded parts (103); the guide device (104) comprises a high polymer self-lubricating limit sliding block; The guide device (104) is arranged at the position of at least one first bridge tower (301) as an XY bidirectional limit guide device (202) for restraining the displacement of the opening bridge (101) along the direction of a road center line (X direction) and the direction of a span center line (Y direction) at the position; y-direction limiting guide devices (204) are arranged at the at least one second bridge tower (302) and are used for restraining Y-direction displacement of the opening bridge (101) at the position and allowing the opening bridge to adapt to temperature difference deformation in the X direction; At least one third bridge tower (303) is provided with an X-direction limiting guide device (203) for limiting X-direction displacement of the opening bridge (101) and allowing the opening bridge to adapt to Y-direction temperature difference deformation; at the at least one fourth pylon (304) no guide means or structures allowing free deformation in the X-and Y-directions are provided for releasing the maximum differential deformation of the opening bridge (101).
2. The guide device according to claim 1, wherein the specific wear rate of the high polymer self-lubricating limit slider is not higher than 10 -7 mg/N-m.
3. The guiding device according to claim 1, wherein the XY bi-directional limit guiding device (202), the X-directional limit guiding device (203) and the Y-directional limit guiding device (204) each comprise a guiding frame, and the polymer self-lubricating limit slider is fixed on the guiding frame in a predetermined spatial relationship to form a limit mating surface with the corresponding rail embedded part (103).
4. A guide arrangement according to claim 3, characterized in that the limit blocks (401, 402, 403) of the XY bi-directional limit guide arrangement (202) are arranged to sandwich the rail buries (305) on the first pylon (301) in X-direction and Y-direction, respectively.
5. A guide arrangement according to claim 3, characterized in that the limit blocks (501) of the X-direction limit guide arrangement (203) are symmetrically arranged for clamping rail buries (307) on the third pylon (303) from both X-directions.
6. A guide arrangement according to claim 3, characterized in that the limit blocks (601, 602) of the Y-direction limit guide arrangement (204) are arranged to constrain the rail buries (306) on the second pylon (302) from the Y-direction.
7. A method of arranging an opening bridge guide adapted to temperature differential deformation, characterized by employing the guide as claimed in any one of claims 1 to 6, comprising the steps of: S1, arranging an XY bidirectional limit guide device (202) and a corresponding track embedded part (305) at the position of a first bridge tower (301), and establishing an initial constraint point of temperature difference deformation of the open bridge (101); S2, arranging a Y-direction limiting guide device (204) and a corresponding track embedded part (306) at the position of a second bridge tower (302), and providing a release space for X-direction temperature difference deformation while restraining Y-direction displacement; S3, arranging an X-direction limiting guide device (203) and a corresponding track embedded part (307) at the position of a third bridge tower (303), and providing a release space for Y-direction temperature difference deformation while restraining X-direction displacement; S4, at the position of the fourth bridge tower (304), maintaining a non-guiding constraint state or setting a structure allowing bidirectional free deformation as a release end of maximum temperature difference deformation.
8. The arrangement method according to claim 7, characterized by, before step S1, further comprising: S0, according to the span of the open bridge, the linear expansion coefficient of the material and the design temperature difference, calculating the expected X-direction deformation quantity (delta X) of the open bridge (101) at the second bridge tower (302) and the expected Y-direction deformation quantity (delta Y) of the open bridge at the third bridge tower (303), and guiding the setting of the gap between the limit sliding block and the track embedded part in the corresponding guiding device according to the deformation quantities.
9. The arrangement method according to claim 7, wherein the guide devices arranged in the steps S1, S2 and S3 are made of a polymer self-lubricating material, so as to realize maintenance-free or low-maintenance operation.
10. The arrangement method according to claim 7, characterized in that the first bridge tower (301), the second bridge tower (302), the third bridge tower (303) and the fourth bridge tower (304) are arranged in sequence in the longitudinal direction of the open bridge (101), and the fourth bridge tower (304) is located at the end furthest from the first bridge tower (301).

Description

Open bridge guiding device adapting to temperature difference deformation and arrangement method Technical Field The invention relates to the technical field of water transportation engineering and bridge engineering, in particular to an open bridge guiding device adapting to temperature difference deformation and an arrangement method. Background The open bridge is used as a key structure for crossing special channels such as a channel, a navigation building and the like, has the core function of realizing the switching of a passing-open state by lifting a bridge body, and is widely applied to cross-sea river engineering, urban transportation junction and water transport engineering. Along with the enlargement of shipping ships (such as the increase of the draft of a megaton ship), the rapid increase of traffic flow and the continuous breakthrough of bridge span (the single span of the current opening bridge is 50-100 m), the day-night temperature difference of the overlapped partial area is obvious (the day-night temperature difference of the partial area can reach 20-35 ℃), and more stringent requirements are put on the operation precision, the response speed and the structural safety of the opening bridge, for example, the clearance of a channel is required to be accurately controlled within +/-5 cm, the opening/closing action of a bridge body is required to be completed in a very short time, and the span effect and the bridge body expansion and buckling deformation caused by the temperature difference are required to be adapted. The guide device is used as a core component for guaranteeing the stability of the movement track of the beam body, and the technical performance of the guide device directly determines the passing efficiency and the operation safety of the opening bridge. The rigid contact design of the traditional guide device cannot adapt to the composite deformation of the vertical corner and the horizontal extension of the large-span beam body caused by temperature difference, the abrasion speed caused by hard contact is increased by 3-5 times under the environment of large temperature difference, and meanwhile, the structural member fatigue damage is extremely easy to be caused by repeated impact of wind load and vibration load of the bridge body guide device and the embedded part, so that the service life of equipment is obviously shortened. Disclosure of Invention The invention aims to solve the technical problems that a guide device cannot adapt to bridge temperature difference deformation, dynamic deviation correction efficiency is low, adaptability is insufficient and the like in the prior art, and provides an opening bridge guide device and an arrangement method which are simple in arrangement, wide in application range and high in safety. The invention is realized by adopting the following technical scheme: an open bridge guide adapted to temperature differential deformation, comprising: the device comprises an opening bridge, at least four bridge towers longitudinally arranged at intervals along the bridge, track embedded parts arranged on part of the bridge towers, and a guide device arranged on the opening bridge and matched with the track embedded parts; the guide device comprises a high polymer self-lubricating limit sliding block; The guide device is arranged at the position of at least one first bridge tower as an XY bidirectional limit guide device and is used for restraining the displacement of the opening bridge along the direction of the central line of the road and the direction of the central line of the span; the Y-direction limiting guide device is arranged at the position of at least one second bridge tower and used for restraining Y-direction displacement of the opening bridge at the position and allowing the opening bridge to adapt to temperature difference deformation in the X direction; the X-direction limiting guide device is arranged at the position of at least one third bridge tower and used for restraining X-direction displacement of the opening bridge at the position and allowing the opening bridge to adapt to Y-direction temperature difference deformation; At the at least one fourth pylon, no guide means or structures allowing free deformation in the X-and Y-directions are provided for releasing the maximum differential deformation of the opening bridge. Furthermore, the specific wear rate of the high-molecular self-lubricating limit sliding block is not higher than 10 -7 mg/N.m. Further, the XY bidirectional limit guide device, the X-direction limit guide device and the Y-direction limit guide device all comprise a guide frame, and the high polymer self-lubricating limit sliding block is fixed on the guide frame in a preset space relation to form a limit matching surface corresponding to the track embedded part. Further, the limit sliding blocks of the XY bi-directional limit guide device are arranged to sandwich the track embedded parts on the first brid