CN112144379A

CN112144379A - Assembled buffering beam falling prevention device

Info

Publication number: CN112144379A
Application number: CN202011026861.9A
Authority: CN
Inventors: 孙得璋; 何先龙; 戴君武; 张昊宇; 李思汉
Original assignee: Institute of Engineering Mechanics China Earthquake Administration
Current assignee: Institute of Engineering Mechanics China Earthquake Administration
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2020-12-29
Anticipated expiration: 2040-09-25
Also published as: CN112144379B

Abstract

The invention relates to the field of bridge construction, and particularly discloses an assembled buffering and beam falling prevention device which comprises a bridge pier, wherein a vertically arranged anti-collision plate is fixed at the top of the bridge pier, the anti-collision plate is superposed with the center line of the bridge pier, fixing frames are symmetrically arranged on two sides of the anti-collision plate, and a connecting plate is hinged to the movable end of each fixing frame; two sections of beam bodies are symmetrically arranged on the bridge pier, cavities for accommodating connecting plates are formed in the end faces of the beam bodies, an access is formed in the bottom wall in each cavity, the width of the access is larger than that of each connecting plate and each fixing frame, connecting rods are hinged to the connecting plates and are spring telescopic rods, and the movable ends of the connecting rods extend out of the access and are detachably connected to the bridge pier; a plurality of hydraulic dampers are horizontally hinged on the inner walls of the two sides of the cavity, and the other ends of the hydraulic dampers are detachably hinged on the connecting plate; two side walls of the connecting plate are connected with limiting blocks through bolts, and gaps are reserved between the limiting blocks and the inner side walls of the cavities; the invention aims to solve the problems that the existing beam falling prevention facility is easy to damage and is difficult to replace after being damaged.

Description

Assembled buffering beam falling prevention device

Technical Field

The invention relates to the technical field of bridge construction, and particularly discloses an assembled buffering and beam falling preventing device.

Background

China is one of the countries with the strongest earthquake activity and the most serious earthquake disaster in the world, and particularly, beam falling examples caused by earthquakes occur in three earthquake activity areas of north China, northwest China and southwest China. The beam falling is one of the bridge earthquake disasters with the highest occurrence frequency, the most serious destructiveness and the most difficult repair. The damage form of the earthquake to the bridge superstructure comprises beam falling damage, collision damage, separation of a support from a guide groove or a bottom basin, and horizontal bearing capacity loss. The main construction measure of the traditional girder falling prevention mode is that concrete stop blocks, anchor bolts or steel brackets are arranged on two sides of the upper part of a pier body, and a transverse bridge can prevent the girder body from falling off. When vibrations take place between the roof beam body and the roof beam facility of preventing falling bumps, in addition the solarization wind-blowing, prevents falling roof beam facility and impairs gradually, and its effect of preventing falling the roof beam easily reduces, and current roof beam facility of preventing falling generally adopts non-detachable mode to connect, and difficult change or replacement cost are great after impaired.

Disclosure of Invention

The invention aims to provide an assembled buffering beam falling prevention device, and aims to solve the problems that an existing beam falling prevention facility is easy to damage and is not easy to replace after being damaged.

In order to achieve the purpose, the basic scheme of the invention is as follows:

an assembled buffering anti-falling beam device comprises a bridge pier, wherein a vertically arranged anti-collision plate is fixed at the top of the bridge pier, the anti-collision plate is superposed with the center line of the bridge pier, fixing frames are symmetrically arranged on two sides of the anti-collision plate, and a connecting plate is hinged to the movable end of each fixing frame; two sections of beam bodies are symmetrically arranged on the bridge pier, cavities for accommodating connecting plates are formed in the end faces of the beam bodies, an access is formed in the bottom wall in each cavity, the width of the access is larger than that of each connecting plate and each fixing frame, connecting rods are hinged to the connecting plates and are spring telescopic rods, and the movable ends of the connecting rods extend out of the access and are detachably connected to the bridge pier; a plurality of hydraulic dampers are horizontally hinged on the inner walls of the two sides of the cavity, and the other ends of the hydraulic dampers are detachably hinged on the connecting plate; the two side walls of the connecting plate are connected with limiting blocks through bolts, and gaps are reserved between the limiting blocks and the inner side walls of the cavities.

Optionally, a cavity is formed in the protective block, a positioning block is horizontally and movably connected in the cavity, and the fixing frame is detachably hinged to the positioning block; the cavity is internally and vertically symmetrically provided with a cavity, a rectangular positioning plate is arranged between the cavities, and two ends of the positioning plate extend into the cavity to be contacted with the protection block; a vertical groove is formed in the positioning block and is parallel to the beam body, the positioning plate vertically penetrates through the groove and horizontally slides in the groove, and damping springs in contact with the positioning plate are fixed at two ends of the groove respectively.

Optionally, a through groove is formed in the top of the protection block, the bottom of the through groove is communicated with the concave cavity in the top, a cover plate is clamped in the through groove, and the top end of the positioning plate penetrates through the concave cavity to abut against the bottom of the cover plate; a vertical buffering gap is reserved between the top end of the positioning block and the top of the cavity, two buffering plates are horizontally arranged in the vertical buffering gap and symmetrically arranged relative to the positioning plate, the buffering plates are in staggered cover plate contact with the top of the cavity, and a damping spring is fixed between each buffering plate and the positioning block.

Optionally, the connecting rod includes dead lever and movable rod, and the spout has been seted up to the tip of dead lever, and movable rod sliding connection is fixed with expanding spring between spout and the movable rod in the spout, sets up the logical groove that runs through the spout on the movable rod lateral wall, and the both sides of movable rod tip are fixed with the gag lever post that stretches out logical groove.

Optionally, a U-shaped clamping plate is arranged on the side wall of the hinged position of the connecting plate and the fixing frame, two ends of the clamping plate are respectively clung to the side walls of the connecting plate and the fixing frame, and the clamping plate is in threaded connection with the side walls of the connecting plate and the fixing frame through bolts.

Optionally, reinforcing ribs are fixed on two sides of the protective block, the other ends of the reinforcing ribs are fixedly connected with the bridge pier, and gaps are reserved between the reinforcing ribs and the side wall of the beam body.

The working principle and the beneficial effects of the scheme are as follows:

1. in the scheme, the connecting plate and the fixing frame extend into the inner cavity of the beam body to form a support to play a role in vertical protection, and the fixing frame is connected with the positioning block, so that when vertical vibration is too large, the capacity is converted into vertical movement of the positioning block, and energy dissipation and shock absorption are performed through the buffer plate and the shock absorption spring to prevent the beam body from jumping up and down to separate from a pier; and the hydraulic damper who connects between the cavity inner wall of connecting plate plays horizontal ascending shock attenuation protection when the roof beam body vibrations produce lateral displacement, and when the displacement was too big, the stopper of connecting plate both sides then played hard interception, prevented that the displacement is too big and break away from the pier.

2. In the scheme, the connecting plate is connected with the fixing frame in a hinged mode, can be folded to facilitate the installation of the beam body, and then is installed by pulling the connecting rod; after preventing falling the roof beam and implementing impaired back, take out the apron, extract the reference column after, the access & exit of accessible roof beam body bottom gets into the internal portion of roof beam, all can dismantle, maintain whole roof beam facility of preventing falling, the present roof beam implementation of preventing falling of relativity, this scheme is maintained and the change mode is more simple and convenient, swift.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a bridge pier according to an embodiment of the present invention;

FIG. 3 is a longitudinal cross-sectional view of an embodiment of the present invention;

FIG. 4 is a horizontal cross-sectional view of an embodiment of the present invention;

FIG. 5 is an enlarged schematic view at A in FIG. 3;

fig. 6 is an enlarged schematic view of fig. 3 at B.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a pier 1, a protective block 2, a beam body 3, a positioning block 4, a fixing frame 5, a connecting block 6, a clamping block 7, a connecting rod 8, a hydraulic damper 9, a limiting block 10, a positioning column 11, a cover plate 12, a damping spring 13, a damping plate 14, a fixing rod 15, a movable rod 16 and a reinforcing rib 17.

Examples

As shown in fig. 1, 2, 3, 4, 5 and 6:

an assembled buffering anti-falling beam device comprises a pier 1, wherein a vertically arranged anti-collision plate is fixed at the top of the pier 1, the anti-collision plate is superposed with the center line of the pier 1, fixing frames 5 are symmetrically arranged on two sides of the anti-collision plate, and movable ends of the fixing frames 5 are hinged with connecting plates; two sections of beam bodies 3 are symmetrically arranged on the pier 1, the end faces of the beam bodies 3 are provided with cavities for accommodating connecting plates, the bottom wall in each cavity is provided with an access, the width of each access is larger than that of each connecting plate and the fixing frame 5, the connecting plates are hinged with connecting rods 8, the connecting rods 8 are spring telescopic rods, and the movable ends of the connecting rods 8 extend out of the accesses and are detachably connected to the pier 1; a plurality of hydraulic dampers 9 are horizontally hinged on the inner walls of the two sides of the cavity, and the other ends of the hydraulic dampers 9 are detachably hinged on the connecting plate; two side walls of the connecting plate are connected with limiting blocks 10 through bolts, and gaps are reserved between the limiting blocks 10 and the inner side walls of the cavities; a cavity is formed in the protection block 2, a positioning block 4 is horizontally and movably connected in the cavity, and the fixing frame 5 is detachably hinged on the positioning block 4; the cavity is symmetrically provided with concave cavities up and down, rectangular positioning plates are arranged between the concave cavities, and two ends of each positioning plate extend into the concave cavities to be contacted with the protection blocks 2; a vertical groove is formed in the positioning block 4 and is parallel to the beam body 3, the positioning plate vertically penetrates through the groove and horizontally slides in the groove, and damping springs 13 which are in contact with the positioning plate are respectively fixed at two ends of the groove; the top of the protection block 2 is provided with a through groove, the bottom of the through groove is communicated with the concave cavity at the top, a cover plate 12 is clamped in the through groove, and the top end of the positioning plate penetrates out of the concave cavity to abut against the bottom of the cover plate 12; a vertical buffer gap is reserved between the top end of the positioning block 4 and the top of the cavity, two buffer plates are horizontally arranged in the vertical buffer gap and symmetrically arranged relative to the positioning plate, the buffer plates are staggered with the cover plate 12 and are in contact with the top of the cavity, and a damping spring 13 is fixed between each buffer plate and the positioning block 4; the connecting rod 8 comprises a fixed rod 15 and a movable rod 16, a chute is formed in the end part of the fixed rod 15, the movable rod 16 is connected in the chute in a sliding manner, a telescopic spring is fixed between the chute and the movable rod 16, a through groove penetrating through the chute is formed in the side wall of the movable rod 16, and limiting rods extending out of the through groove are fixed on two sides of the end part of the movable rod 16; a U-shaped clamping plate is arranged on the side wall of the hinged part of the connecting plate and the fixed frame 5, two ends of the clamping plate are respectively clung to the connecting plate and the side wall of the fixed frame 5, and the clamping plate is connected to the connecting plate and the side wall of the fixed frame 5 through bolts and threads; reinforcing ribs 17 are fixed on two sides of the protective block 2, the other ends of the reinforcing ribs 17 are fixedly connected with the pier 1, and gaps are reserved between the reinforcing ribs 17 and the side walls of the beam body 3.

Detailed Description

Installing the positioning block 4 in the cavity, inserting the positioning column 11 into the cavity, and covering the cover plate 12 to complete the installation of the positioning block 4; then the fixing frame 5 and the connecting plate are arranged on the side wall of the positioning block 4, and the connecting plate and the fixing frame 5 are folded; and then the girder 3 is placed on the pier 1.

Stretching the connecting rod 8 again, flatly placing the fixing frame 5 and the connecting plate, enabling the connecting plate to extend into the cavity of the beam body 3 and to be tightly attached to the bottom wall of the cavity, clamping the fixture block 7 at the hinged position of the connecting plate and the fixing frame 5, fixing the fixture block 7 by using a bolt, and detachably hinging the connecting rod 8 and the pier 1; the hydraulic damper 9 and the limiting block 10 are respectively connected with the side wall of the connecting plate.

When an earthquake occurs, the beam body 3 extrudes the hydraulic damper 9 when the beam body 3 transversely displaces, the hydraulic damper 9 is used for buffering and damping, when the transverse displacement is too large, the limiting block 10 is tightly attached to the inner wall of the beam body 3, the rigid interception limiting is realized, and the beam body 3 is prevented from being separated from the pier 1 when the displacement is too large; when the beam body 3 vertically displaces, the beam body 3 drives the positioning block 4 to vertically displace through the connecting plate and the fixing frame 5, the positioning block 4 and the damping plate 14 extrude the damping spring 13 in the moving process, so that the damping effect is realized, meanwhile, the chamber limits the vertical displacement distance of the positioning block 4, the positioning block 4 is effectively limited to be separated from the chamber, and the beam body 3 is limited from being separated from the pier 1 due to overlarge vertical displacement; when the beam body 3 horizontally displaces, the beam body 3 drives the hydraulic damper 9 to obliquely stretch, the hydraulic damper 9 is utilized for primary buffering and damping, when the hydraulic damper 9 reaches the maximum stretching distance, the beam body 3 pushes the connecting plate and the fixing frame 5 through the hydraulic damper 9 so as to push the positioning block 4 to horizontally slide, and in the sliding process of the positioning block 4, the damping spring 13 in the groove of the positioning block 4 is extruded with the positioning rod so as to perform secondary buffering and damping, so that the beam body 3 is prevented from being damaged due to vibration; when the horizontal displacement exceeds the damping range of the damping spring 13, the positioning block 4 is directly contacted with the positioning rod, and the positioning block 4 is limited by the positioning column 11 to continue to displace.

When the connecting plate displaces, the movable rod 16 in the connecting rod 8 displaces along with the connecting plate, namely the movable rod 16 slides in the chute of the fixed rod 15, and the relative sliding between the movable rod 16 and the fixed rod 15 is utilized to match the end parts of the fixed rod 15 and the movable rod 16 to be hinged, so that the connection between the connecting rod 8 and the connecting plate cannot be disconnected along with the displacement of the connecting plate.

When the anti-falling beam is overhauled or replaced, the cover plate 12 is taken down, the positioning column 11 is drawn out, the connecting rod 8 is disassembled from the pier 1 and enters the cavity of the beam body 3 through the inlet and the outlet and the fixing frame 5, the hydraulic damper 9, the limiting block 10 and the clamping block 7 are disassembled in sequence, the connecting plate and the fixing frame 5 are folded and disassembled, the positioning block 4 is withdrawn from the cavity, all parts are maintained or replaced in sequence, and then the parts are assembled again in sequence; for other complete non-detachable prevent falling roof beam facilities, prevent that each part of the roof beam facility that falls in this scheme all can dismantle and get off to maintain or change, need not the part damage and lead to holistic change, the maintenance process is simple and efficient promptly, also can reach resources are saved's purpose simultaneously.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims

1. The utility model provides a roof beam device is prevented falling in assembled buffering which characterized in that: the bridge pier comprises a bridge pier, wherein a vertically arranged anti-collision plate is fixed at the top of the bridge pier, the anti-collision plate is superposed with the center line of the bridge pier, fixing frames are symmetrically arranged on two sides of the anti-collision plate, and movable ends of the fixing frames are hinged with connecting plates; two sections of beam bodies are symmetrically arranged on the bridge pier, cavities for accommodating connecting plates are formed in the end faces of the beam bodies, an access is formed in the bottom wall in each cavity, the width of the access is larger than that of each connecting plate and each fixing frame, connecting rods are hinged to the connecting plates and are spring telescopic rods, and the movable ends of the connecting rods extend out of the access and are detachably connected to the bridge pier; a plurality of hydraulic dampers are horizontally hinged on the inner walls of the two sides of the cavity, and the other ends of the hydraulic dampers are detachably hinged on the connecting plate; the two side walls of the connecting plate are connected with limiting blocks through bolts, and gaps are reserved between the limiting blocks and the inner side walls of the cavities.

2. The assembled buffering beam-falling prevention device according to claim 1, wherein: a cavity is formed in the protective block, a positioning block is horizontally and movably connected in the cavity, and the fixing frame is detachably hinged on the positioning block; the cavity is internally and vertically symmetrically provided with a cavity, a rectangular positioning plate is arranged between the cavities, and two ends of the positioning plate extend into the cavity to be contacted with the protection block; a vertical groove is formed in the positioning block and is parallel to the beam body, the positioning plate vertically penetrates through the groove and horizontally slides in the groove, and damping springs in contact with the positioning plate are fixed at two ends of the groove respectively.

3. The assembled buffering beam-falling prevention device according to claim 2, wherein: the top of the protective block is provided with a through groove, the bottom of the through groove is communicated with the concave cavity at the top, a cover plate is clamped in the through groove, and the top end of the positioning plate penetrates out of the concave cavity to abut against the bottom of the cover plate; a vertical buffering gap is reserved between the top end of the positioning block and the top of the cavity, two buffering plates are horizontally arranged in the vertical buffering gap and symmetrically arranged relative to the positioning plate, the buffering plates are in staggered cover plate contact with the top of the cavity, and a damping spring is fixed between each buffering plate and the positioning block.

4. The assembled buffering beam-falling prevention device according to claim 3, wherein: the connecting rod includes dead lever and movable rod, and the spout has been seted up to the tip of dead lever, and movable rod sliding connection is fixed with expanding spring between spout and the movable rod in the spout, sets up the logical groove that runs through the spout on the movable rod lateral wall, and the both sides of movable rod tip are fixed with the gag lever post that stretches out logical groove.

5. The assembled buffering beam-falling prevention device according to claim 4, wherein: the U-shaped clamping plates are arranged on the side walls of the hinged positions of the connecting plates and the fixing frame, two ends of each clamping plate are respectively clung to the side walls of the connecting plates and the fixing frame, and the clamping plates are connected to the side walls of the connecting plates and the fixing frame through bolts in a threaded mode.

6. The assembled buffering beam-falling prevention device according to claim 5, wherein: reinforcing ribs are fixed on two sides of the protection block, the other ends of the reinforcing ribs are fixedly connected with the bridge pier, and gaps are reserved between the reinforcing ribs and the side wall of the beam body.