CN111119038B - Multi-directional displacement composite plate type expansion device for highway bridge - Google Patents
Multi-directional displacement composite plate type expansion device for highway bridge Download PDFInfo
- Publication number
- CN111119038B CN111119038B CN201911400613.3A CN201911400613A CN111119038B CN 111119038 B CN111119038 B CN 111119038B CN 201911400613 A CN201911400613 A CN 201911400613A CN 111119038 B CN111119038 B CN 111119038B
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- fixed plate
- slideway
- compression
- connecting frame
- displacement device
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
Abstract
The invention discloses a multidirectional displacement composite plate type expansion device for a highway bridge, which consists of a displacement device and a fixed plate, wherein one end of the fixed plate is welded with the upper surface of an inner side beam of the displacement device in a flush manner, a force transmission fulcrum is formed by a supporting block at the inner side, and a polytetrafluoroethylene plate on the upper surface of the supporting block and the fixed plate form a sliding supporting point; the fixed plate opposite side passes through bolted connection on the anchor subassembly with the bridge floor, and the anchor subassembly comprises anchor box, compresses tightly the rubber piece and connecting bolt, and the fixed plate passes through the boss embedding anchor box of bottom, and the boss bottom forms the pretightning force with compressing tightly the rubber piece when the bolt-up. The displacement device comprises a beam body, a connecting frame, a compression beam, compression supports, a slideway and compression bolts, wherein the boundary beam and the middle beam are respectively compressed on the slideway by the bolts at two ends of the compression beam through the respective connecting frame and the compression supports, and the beams slide along a sliding surface formed by the compression supports, the compression beam and the contact surface of the slideway, so that the requirement of telescopic displacement is met.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a multidirectional displacement composite plate type telescopic device for a highway bridge.
Background
The expansion device for highway bridge at present is divided into two structural forms of a modulus type and a comb-shaped plate. The modular expansion device mainly comprises a bearing part, a supporting part and an adjusting member, wherein the bearing part bears the rolling of a vehicle and comprises special section steel and a sealing strip, the supporting part comprises a supporting beam, a rubber support and a supporting box which are positioned below the bearing part and used for bearing the load transmission of the vehicle, and the adjusting member adjusts the displacement uniformity of each beam of the bearing part by utilizing the shearing force of a vertically-installed spring or the pressing force of a horizontally-installed polyurethane spring. Comb shape plate-type telescoping device develops through improving on the basis at domestic early zigzag expansion joint and comes, it is mainly by big pinion rack, little pinion rack (fixed tooth plate), the waterproof area, the slip face and connect the crab-bolt and constitute, big pinion rack adopts the leapfrog formula, one end at the bridge is connected with the bridge floor with connecting the crab-bolt, the expansion joint of great displacement volume except with bolted connection, increased the axis of rotation or can satisfy big pinion rack micro-rotating's structural requirement, the other end is the bridge floor of broach form overlap joint at the other end, the bottom forms the slip face with stainless steel board, little pinion rack is fixed in the front with connecting bolt, form negative and positive broach with big pinion rack, satisfy the flexible needs of bridge. The comb-shaped plate expansion joint is shallow in specific installation depth, good in surface smoothness and comfortable in driving, is applied to domestic highway bridges, but is not long in service life due to the fact that a congenital anchoring system is thin, and transverse displacement of the bridge is limited by the male and female teeth, so that the phenomena of blocking, tooth breakage and steel plate loosening and falling are found to be more in practical application, and the service life and traffic safety are seriously affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a multidirectional displacement composite plate type expansion device for a highway bridge, so that the purposes of multidirectional displacement and shallow burying of an analog-digital expansion device are realized, and the service life and the driving comfort of the expansion device can be improved.
The technical scheme is as follows:
a multidirectional displacement composite plate type expansion device for highway bridges comprises a displacement device and a fixed plate, wherein one end of the fixed plate is welded with the upper surface of an inner side beam of the displacement device in a flush manner, a force transmission fulcrum is formed by a supporting block at the inner side, and a polytetrafluoroethylene plate on the upper surface of the supporting block and the fixed plate form a sliding supporting point; the other side of the fixed plate is connected with the bridge floor through a connecting bolt on the anchoring assembly, the anchoring assembly consists of an anchoring box body, a compression rubber block and a connecting bolt, the fixed plate is embedded into the anchoring box body through a boss at the bottom, and a pre-tightening force is formed when the boss bottom and the compression rubber block are fastened through the connecting bolt;
the upper part of the displacement device consists of an inner edge beam, an outer edge beam, a middle beam and a sealing rubber strip, the lower part of the displacement device consists of a supporting part and a slideway, the inner edge beam and the outer edge beam are made of C-shaped steel or F-shaped steel and are respectively connected with an inner beam connecting frame and an outer beam connecting frame into a whole in a welding mode, wherein the outer beam connecting frame is of a bottomless box-shaped structure and is fixedly welded with the slideway, the bottom of the inner beam connecting frame and the bottom of the middle beam connecting frame are pressed on the slideway by a pressing beam through a pressing support pair, the pressing support pair is two same rubber supports, the PTFE plate surfaces of the rubber supports are respectively tightly adhered with the pressing beam and the slideway to form an upper sliding surface and a lower sliding surface, the pressing beam is tightly pressed with the slideway by bolts through the pressing supports at two ends, notches are cut at the connecting positions of the middle beam and the middle beam connecting frame, the middle beam connecting frame is embedded and then welded and fixed, control springs are installed at the two ends of the inner edge beam, the outer edge beam and the middle beam at the upper part, and the inner edge beam are clamped by locking screws, And between the outer beam and the middle beam, the reserved width is adjusted by a nut at the end of the locking screw rod, and the nut is released to meet free expansion after the installation is finished.
Furthermore, the inner edge beam, the outer edge beam and the middle beam of the displacement device slide on the slideway and the pressing beam through the pressing support pair, when the bridge is subjected to telescopic deformation caused by vehicle load and temperature change, the bridge drives the outer edge beam of the displacement device to pull the pressing beam to move synchronously, the distance between the outer edge beam and the middle beam is increased or reduced, the control spring between the outer edge beam and the adjacent middle beam is loosened or pressed, and the elasticity is reduced or increased.
The invention has the following beneficial technical effects:
1) the device provided by the invention comprises two parts, namely a fixed plate and a displacement device, wherein the crossing type fixed plate plays a role in connection and bearing, the displacement device plays a role in displacement control, one end of the fixed plate is connected with an abutment by adopting an anchoring assembly connecting bolt, and the other end of the fixed plate is welded with a side beam of the displacement device during installation. The displacement device adopts a modular structure, an upper structure is formed by the edge beams and the plurality of middle beams, each beam is pressed on the slideway at the bottom by bolts at two ends through the connecting frame, the pressing support pair, the pressing beam and the pressing support, and free extension of the device can be realized by the pressing support pair, the slideway and the pressing beam which form the upper and lower moving pair. The control spring and the locking screw rod which are arranged at the two ends of the beam body realize the adjustment of the delivery width and the adjustment of the expansion uniformity in the working process.
2) The fixed plate and the displacement device are manufactured and installed in a segmented mode, the length of each segment can be adjusted according to design, the length of the fixed plate and the length of the displacement device can be consistent or inconsistent, the displacement device can be manufactured integrally or in a segmented mode, and the fixed plate and the displacement device are welded together after installation.
3) The anchor subassembly that fixed plate one end was adopted contains the anchor box, the compression rubber piece, boss, connecting bolt as an organic whole with the fixed plate, connecting bolt passes the box, inside boss embedding box, the boss compression compressed tightly the rubber piece and produced the pretightning force when screwing up connecting bolt, can play the bolt anticreep and satisfy the flexible coupling demand of fixed plate, the boss under the fixed plate of embedding anchor box can play the increase and pull the ability of fixed plate.
4) The other end of the fixing plate is welded with the inner edge beam of the displacement device, a fixed connection point is formed on the other side of the bridge beam plate, another support point is formed at a position close to the beam end by the support block, the pressing beam, the pressing support and the slide way through the up-down penetrating bolt, the stress state and the load transfer mode of the fixing plate are greatly improved, and the upper surface of the counter sink type support block is provided with the tetrafluoro plate which can form a translation sliding pair with the bottom joint surface of the fixing plate.
5) The displacement device comprises a beam body, a connecting frame, a compression beam, compression supports, a slideway and compression bolts, wherein the boundary beam and the middle beam are respectively compressed on the slideway by the bolts at two ends of the compression beam through the respective connecting frame and the compression supports, and each beam slides through a sliding surface formed by a compression support pair, the compression beam and a contact surface of the slideway, so that the requirement of telescopic displacement is met.
6) The displacement device adopts an integral structure, is supported at multiple points, has good force transmission effect and stable structure, and has longer service life. According to the actual flexible displacement volume of bridge, roof beam quantity satisfies the design needs in this telescoping device accessible increase and decrease, and the accessible inlays the control spring and the locking screw between each shaped steel and adjusts the seam width that dispatches from the factory, the parameter adjustment when greatly making things convenient for production and processing and installation.
Drawings
Fig. 1 is a schematic structural diagram of a multi-directional displacement composite plate type telescopic device.
Fig. 2 is a schematic view of the structure of the displacement device.
Description of reference numerals:
the device comprises a displacement device 1, a fixing plate 2, an anchoring box body 3, a compression rubber block 4, a connecting bolt 5, a supporting block 6, an inner edge beam 7, an outer beam connecting frame 8, an outer edge beam 9, a middle beam 10, a compression beam 11, a slideway 12, a compression support 13, a compression bolt 14, a compression support pair 15, an inner beam connecting frame 16, a locking screw 17, a control spring 18 and a sealing rubber strip 19.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following describes in detail a multidirectional displacement composite plate type expansion device for a road bridge according to the present invention with reference to the following embodiments. The following examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1 (a schematic structural diagram of a multidirectional displacement composite plate type telescopic device), the device mainly comprises a displacement device 1 and a fixed plate 2, wherein the fixed plate 2 is welded with an inner edge beam 7 of the displacement device 1. One end of the fixed plate 2 is welded with the upper surface of the displacement device inner side beam 7 in a flush manner to form an integral structure, a force transmission fulcrum is formed on the inner side by the supporting block 6, and the tetrafluoro plate on the upper surface of the supporting block 6 and the fixed plate 2 form a sliding supporting point. The other side of the fixed plate 2 is connected with the bridge floor through a connecting bolt on the anchoring assembly, the anchoring assembly is composed of an anchoring box body 3, a compression rubber block 4 and a connecting bolt 5, the fixed plate 2 is embedded into the anchoring box body 3 through a boss at the bottom, and the bottom of the boss and the compression rubber block 4 form a pre-tightening force when the connecting bolt is fastened.
Referring to fig. 2 (a schematic structural diagram of the displacement device) in conjunction with fig. 1, the displacement device 1 is composed of an upper part and a lower part: the upper part consists of an inner edge beam 7, an outer edge beam 9, a middle beam 10 and a sealing rubber strip 19. The lower part consists of a supporting part and a slideway, and the upper part and the lower part are respectively welded together with corresponding connecting frames. The inner and outer boundary beams are C-shaped steel or F-shaped steel and are respectively connected with the inner beam connecting frame 16 and the outer beam connecting frame 8 into a whole in a welding mode, wherein the outer beam connecting frame 8 is of a bottomless box type structure and is fixedly welded with the slide rail 12, the inner beam connecting frame and the middle beam connecting frame box bottom are compressed on the slide rail by the compression beam 11 through the compression support pair 15, the compression support pair 15 is two same rubber supports, and the PTFE plate surfaces of the rubber supports are respectively attached to the compression beam and the slide rail to form an upper sliding surface and a lower sliding surface. The pressing beam 11 is pressed by a bolt and a slideway 12 through pressing supports 13 at two ends, a notch is cut at the connecting position of each middle beam 10 and the middle beam connecting frame, and the middle beam connecting frames are welded together after being embedded so as to reduce the height of a seam body. Control springs 18 are arranged at two ends of the inner side beam, the outer side beam and the middle beam at the upper part, the control springs are clamped among the inner side beam, the outer side beam and the middle beam through locking screws 17, the reserved width of the factory is adjusted by nuts at the ends of the locking screws 17, and the nuts are released to meet free expansion after the control springs are installed.
The inner, outer and centre beams of the displacement device 1 can slide on the runners 12 and the hold-down beams 11 via hold-down support pairs 15. When the bridge is subjected to telescopic deformation caused by vehicle load and temperature change, the bridge drives the outer edge beam 9 of the displacement device to pull the pressing beam 11 to move synchronously, the distance between the outer edge beam 9 and the middle beam 10 is increased or reduced, the control spring 18 between the outer edge beam and the adjacent middle beam is loosened or pressed, and the elasticity is reduced or increased. Taking the reduction of the elastic force as an example, the elastic force of the control spring 18 between the first middle beam and the second middle beam is greater than the elastic force of the spring between the side beam and the first middle beam, the resultant force in the horizontal direction pushes the second middle beam to move towards the first middle beam, when the resultant force is zero, namely the balance point is reached, the second middle beam stops moving, and by analogy, the whole displacement component can finish the displacement adjustment again under the action of the control spring 18, and the purpose of uniform displacement control is achieved.
As shown in fig. 2, the pressing support pairs 15 and the slideways 12 are plane moving pairs, which can realize the longitudinal and transverse displacement motion of each beam, except the outer edge beam 9, the plane moving pairs between the pressing support pairs 15 and the pressing beams 11 at the bottom of the rest beam connecting frames can realize the multidirectional displacement of each connecting point of each beam, and can meet the requirement of multidirectional displacement. Sealing rubber bands 19 are arranged among the steel beams to solve the problems of water resistance and pollution resistance.
In the work, the vehicle load acting on the fixed plate 2 can be transmitted to the bridge floor through the anchoring component and the contact surface of the fixed plate 2 and the bridge on one side of the bridge beam end, the load on the other side of the fixed plate 2 can be transmitted to the bridge floor through the inner edge beam 7, the inner beam connecting frame 16, the pressing support pair 15, the slide way and supporting block 6, the pressing beam 11 and the pressing support 13 at multiple points, and the vehicle load acting on the displacement device 1 can be transmitted to the bridge through the beam body, the connecting frame, the pressing support pair and the slide way.
The present invention is not limited to the above-described examples, and various changes can be made without departing from the spirit and scope of the present invention within the knowledge of those skilled in the art.
Claims (1)
1. A multidirectional displacement composite plate type expansion device for a highway bridge is characterized by comprising a displacement device and a fixed plate, wherein one end of the fixed plate is welded with the upper surface of an inner side beam of the displacement device in a flush manner, a force transmission fulcrum is formed by a supporting block at the inner side, and a polytetrafluoroethylene plate on the upper surface of the supporting block and the fixed plate form a sliding supporting point; the other side of the fixed plate is connected with the bridge floor through a connecting bolt on the anchoring assembly, the anchoring assembly consists of an anchoring box body, a compression rubber block and a connecting bolt, the fixed plate is embedded into the anchoring box body through a boss at the bottom, and a pre-tightening force is formed when the boss bottom and the compression rubber block are fastened through the connecting bolt;
the upper part of the displacement device consists of an inner edge beam, an outer edge beam, a middle beam and a sealing rubber strip, the lower part of the displacement device consists of a supporting part and a slideway, the inner edge beam and the outer edge beam are made of C-shaped steel or F-shaped steel and are respectively connected with an inner beam connecting frame and an outer beam connecting frame into a whole in a welding mode, wherein the outer beam connecting frame is of a bottomless box-shaped structure and is fixedly welded with the slideway, the bottom of the inner beam connecting frame and the bottom of the middle beam connecting frame are pressed on the slideway by a pressing beam through a pressing support pair, the pressing support pair is two same rubber supports, the PTFE plate surfaces of the rubber supports are respectively tightly adhered with the pressing beam and the slideway to form an upper sliding surface and a lower sliding surface, the pressing beam is tightly pressed with the slideway by bolts through the pressing supports at two ends, notches are cut at the connecting positions of the middle beam and the middle beam connecting frame, the middle beam connecting frame is embedded and then welded and fixed, control springs are installed at the two ends of the inner edge beam, the outer edge beam and the middle beam at the upper part, and the inner edge beam are clamped by locking screws, Between the outer beam and the middle beam, the reserved width is adjusted by a nut at the end of the locking screw rod, and the nut is released to meet free expansion after the installation is finished;
when the bridge is subjected to telescopic deformation caused by vehicle load and temperature change, the bridge drives the outer edge beam of the displacement device to pull the pressing beam to move synchronously, the distance between the outer edge beam and the middle beam is increased or reduced, a control spring between the outer edge beam and the adjacent middle beam is loosened or pressed, and the elasticity is reduced or increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911400613.3A CN111119038B (en) | 2019-12-30 | 2019-12-30 | Multi-directional displacement composite plate type expansion device for highway bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911400613.3A CN111119038B (en) | 2019-12-30 | 2019-12-30 | Multi-directional displacement composite plate type expansion device for highway bridge |
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| CN111119038A CN111119038A (en) | 2020-05-08 |
| CN111119038B true CN111119038B (en) | 2021-12-03 |
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| CN201911400613.3A Active CN111119038B (en) | 2019-12-30 | 2019-12-30 | Multi-directional displacement composite plate type expansion device for highway bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942087B (en) * | 2021-01-29 | 2022-07-22 | 赵增豪 | Equidistant displacement bridge expansion joint device |
| CN112853960A (en) * | 2021-02-27 | 2021-05-28 | 天津城建大学 | Install bridge telescoping device fast |
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