CN211772804U

CN211772804U - Bridge expansion device

Info

Publication number: CN211772804U
Application number: CN201922110349.1U
Authority: CN
Inventors: 张建勋; 惠涛; 韩功学; 黄正强; 牛文利
Original assignee: Zhengzhou Communications Planning Survey & Design Institute
Current assignee: Zhengzhou Transportation Planning Survey Design And Research Institute Co ltd
Priority date: 2019-11-30
Filing date: 2019-11-30
Publication date: 2020-10-27
Anticipated expiration: 2029-11-30

Abstract

The utility model relates to a bridge engineering construction field, concretely relates to bridge telescoping device. The bridge expansion device comprises comb plates and an anchoring base, wherein tooth-shaped structures are arranged at the front ends of the comb plates, and anchoring holes are arranged at the rear ends of the comb plates; the anchoring base is used for being fixed on a bridge deck or a bridge abutment and is provided with an anchoring connector, and the anchoring connector is used for being matched with the toothed plate anchoring part to fix the comb plate on the corresponding side; a toothed plate clamping groove is formed in the anchoring base and is located behind the anchoring connecting body, and a comb toothed plate faces the front of the notch of the toothed plate clamping groove; the groove cavity of the tooth plate clamping groove forms a clamping space, and the clamping space is used for clamping the rear end part of the corresponding side comb plate; the top cell wall of pinion rack draw-in groove forms and is used for carrying out spacing vertical limit structure along vertical direction to the rear end portion of fishback. Above-mentioned scheme can improve the easy condition of warping or becoming flexible of pinion rack anchor assembly to avoid appearing the problem that the pinion rack pine takes off.

Description

Bridge expansion device

Technical Field

The utility model relates to a bridge engineering construction field, concretely relates to bridge telescoping device.

Background

The bridge expansion joint is a space arranged between the ends of two bridge decks, between the ends of the bridge decks and the abutment or at the hinge joint position of the bridge, and the like, and aims to adapt to thermal expansion and cold contraction between the bridge decks or between the bridge decks and the abutment and meet the deformation requirement of the bridge deck. The bridge expansion joint can freely expand and contract in two directions of being parallel to the axis of the bridge and being perpendicular to the axis of the bridge, and a bridge expansion device is further arranged to realize the connection of the bridge deck. The water stop is arranged below the bridge expansion device, is a waterproof structure of the bridge expansion joint, is generally formed by a groove-shaped sealing rubber belt, extends along the width direction of the bridge, and is used for leading water to two sides of the width direction of the bridge and discharging the water.

One widely used bridge expansion device in the prior art is a comb plate expansion device, also called a comb-tooth bridge expansion device, and includes a first tooth plate, a second tooth plate and an anchoring base, as disclosed in the chinese patent application with application publication No. CN 104452581A. The front ends of the first toothed plate and the second toothed plate are provided with adaptive tooth-shaped structures, and the rear ends of the first toothed plate and the second toothed plate are provided with bolt holes. The anchoring base is used for being welded to embedded parts such as embedded steel plates or steel bars and the like in the bridge deck and poured in concrete; the anchoring base comprises an angle steel, and the top horizontal part of the angle steel forms a toothed plate supporting plate for supporting the corresponding first toothed plate or second toothed plate; be equipped with the nut seat on being used for supporting corresponding first pinion rack or the second pinion rack, the nut seat forms the anchor connecting seat, corresponds with the bolt hole on first pinion rack and the second pinion rack, uses the bolt can be fixed first pinion rack and second pinion rack to the anchor base on.

However, first pinion rack and second pinion rack among the above-mentioned bridge telescoping device that has now are cantilever type structure, and the rear end passes through the bolt fastening, and the structural strength requirement to the bolt is very high, if receive rolling of wheel, the bolt appears warping easily or becomes flexible, leads to the pinion rack to loosen, and then leads to the telescoping device inefficacy.

For another simple-support comb tooth expansion device in the prior art, the toothed plate is of a non-overhanging structure, for example, an SF steel comb tooth expansion device disclosed in chinese patent application with application publication No. CN107974935A, although the toothed plate is of a simple-support form, the height difference at both sides of the expansion joint and the deformation at the expansion joint when the gear is pressed can also cause the bolt for the second toothed plate to be deformed or loosened by a large acting force, resulting in the loosening of the toothed plate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bridge telescoping device, the pinion rack anchor assembly who solves among the current bridge telescoping device is out of shape or not hard up easily, leads to the problem that the pinion rack pine takes off.

The utility model discloses well bridge telescoping device adopts following technical scheme:

a bridge expansion device comprises a comb plate and an anchoring base, wherein the comb plate comprises a first tooth plate and a second tooth plate, and the first tooth plate and the second tooth plate are respectively used for being fixed to the corresponding anchoring base;

the front ends of the comb plates are provided with tooth-shaped structures, and the rear ends of the comb plates are provided with anchoring holes;

the anchoring base is used for being fixed on a bridge deck or a bridge abutment and is provided with an anchoring connector, and the anchoring connector is used for being matched with the toothed plate anchoring part to fix the comb plate on the corresponding side;

a toothed plate clamping groove is formed in the anchoring base and is located behind the anchoring connecting body, and a comb toothed plate faces the front of the notch of the toothed plate clamping groove;

the groove cavity of the tooth plate clamping groove forms a clamping space, and the clamping space is used for clamping the rear end part of the corresponding side comb plate;

the top cell wall of pinion rack draw-in groove forms and is used for carrying out spacing vertical limit structure along vertical direction to the rear end portion of fishback.

The technical scheme has the beneficial effects that: the vallecular cavity of the pinion rack draw-in groove that is located the rear of anchor connector can form the joint space, the joint space supplies the rear end card of corresponding side fishback to go into, and simultaneously, the top cell wall of pinion rack draw-in groove forms and is used for carrying out spacing vertical limit structure along vertical direction to the rear end of fishback, and like this, the pinion rack draw-in groove can carry on spacingly through the top cell wall to the rear portion of fishback, share the effort of pinion rack anchor assembly, improve the easy deformation of pinion rack anchor assembly or the not hard up condition, thereby avoid appearing the problem that the pinion rack pine takes off.

As a preferred technical scheme, the rear end part of the comb plate is provided with a clamping step which forms a clamping part;

the thickness of the clamping part is smaller than the front side part of the comb plate and is used for being clamped in the clamping space.

The technical scheme has the beneficial effects that: set up the joint step and can make the top surface and the pinion rack draw-in groove coplane of fishback, improve the planarization of bridge floor, promote the impression of traveling.

As a preferable technical solution, the width of the clamping portion is larger than the depth of the clamping space.

The technical scheme has the beneficial effects that: adopt this scheme can guarantee the effort area of joint part and fishback to the at utmost, increase spacing arm of force, improve spacing performance.

As a preferred technical solution, the anchoring base includes a tooth plate supporting plate, which is horizontally arranged and used for supporting the comb plate of the corresponding side;

the toothed plate supporting plate is provided with an L-shaped clamping body, and the toothed plate clamping groove is formed by the L-shaped clamping body and the toothed plate supporting plate in a surrounding mode.

The technical scheme has the beneficial effects that: the toothed plate clamping groove is simple in structure and easy to manufacture and is beneficial to reducing weight, and the L-shaped clamping body and the toothed plate supporting plate are enclosed.

As an optimal technical scheme, the L-shaped clamping body and the toothed plate supporting plate are integrally formed.

The technical scheme has the beneficial effects that: l shape joint body and pinion rack backup pad integrated into one piece are favorable to guaranteeing manufacturing accuracy, and then guarantee spacing reliability.

As a preferred technical scheme, the vertical part of the L-shaped clamping body is connected to the rear side edge of the toothed plate supporting plate.

The technical scheme has the beneficial effects that: by adopting the scheme, the L-shaped clamping body is convenient to form and manufacture.

As an optimal technical scheme, the size of the anchoring base corresponding to the second toothed plate in the front-back direction is larger than that of the second toothed plate in the front-back direction, and the tooth-shaped structure of the first toothed plate is used for supporting the anchoring base corresponding to the second toothed plate to form a simply-supported comb tooth telescopic device.

The technical scheme has the beneficial effects that: simple supporting formula broach telescoping device compares with cantilever type structure, can provide higher structural stability, further reduces the atress of pinion rack anchor assembly.

As a preferred technical scheme, the toothed plate anchoring part is a bolt, and the anchoring connecting body is an anchoring bolt sleeve; the bolt is used for downwards penetrating through the anchoring hole in the comb plate and is in threaded connection with the anchor bolt sleeve.

The technical scheme has the beneficial effects that: the combined form of the bolt and the anchor bolt sleeve has simple structure and convenient disassembly and assembly.

and the toothed plate supporting plate is provided with an anchor bolt sleeve fixing hole, and the top of the anchor bolt sleeve is embedded into the anchor bolt sleeve fixing hole and is welded and fixed with the toothed plate supporting plate.

The technical scheme has the beneficial effects that: the anchor bolt sleeve is fixed by the anchor bolt sleeve fixing hole, so that the structural strength is guaranteed, and the overall reliability is improved.

The above-described preferred embodiments may be adopted alone, or two or more embodiments may be arbitrarily combined when they can be combined, and the embodiments formed by the combination are not specifically described here and are included in the description of the present patent.

Drawings

Fig. 1 is a schematic view of a usage state of an embodiment of a middle bridge expansion device of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1, the cross-section being perpendicular to the direction of extension of the bridge expansion joint;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a right side view of FIG. 2, with portions of the pontic hidden;

FIG. 5 is a schematic view of the structure of FIG. 1 with the bridge removed;

fig. 6 is a side view of fig. 5 viewed in a direction perpendicular to the extension of the bridge expansion joint;

fig. 7 is a schematic view of a state of use of embodiment 2 of the bridge expansion device according to the present invention;

fig. 8 is a cross-sectional view of fig. 7, the cross-section being perpendicular to the direction of extension of the bridge expansion joint.

The names of the components corresponding to the corresponding reference numerals in the drawings are: 1-a first bridge; 2-a second pontic; 3-an asphalt pavement layer; 4-a first anchoring base; 41-first toothed plate support plate; 42-a first vertical plate, 43-a first L-shaped clamping body, 44-a toothed plate clamping groove; 5-a second anchoring base; 51-second toothed plate support plate; 52-a second vertical plate, 53-a second L-shaped clamping body; 6-a first bolt; 7-anchor bolt sleeve; 8-long anchoring steel bars; 9-short anchoring steel bars; 10-an elastic sealant; 11-elastic rubber mold; 12-water stop belt; 13-a first toothed plate; 131-clamping step; 14-a second bolt; 15-a second toothed plate; 16-anchoring holes, 17-anchor bolt sleeve fixing holes; 18-bridge expansion joints; 19-bridge step.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The features and properties of the present invention are described in further detail below with reference to examples.

The utility model discloses embodiment 1 of well bridge telescoping device is as shown in fig. 1 to fig. 6 for be connected to the bridge expansion joint 18 department that first pontic 1 and second pontic 2 formed, including fishback and anchor base. In this embodiment, the first bridge body 1 is a bridge deck, and the second bridge body 2 is a bridge abutment, specifically, a concrete back wall on the bridge abutment. The comb plate comprises a first toothed plate 13 and a second toothed plate 15, correspondingly, the anchoring base comprises a first anchoring base 4 and a second anchoring base 15, and the first toothed plate 13 and the second toothed plate 15 are respectively used for being fixed on the first anchoring base 4 and the second anchoring base 15.

As shown in fig. 1 and 3, the first tooth plate 13 and the second tooth plate 15 are arranged along the length direction of the bridge expansion joint 18 (i.e. the width direction of the bridge), so as to form a plurality of modules, and when in use, a proper number of modules can be arranged according to the width of the bridge deck. The front end of each comb plate is provided with a tooth-shaped structure, and the rear end is provided with an anchoring hole 16. Of course, it should be noted that "front" and "rear" are referred to each comb plate, and one end of each comb plate provided with the tooth-shaped structure is a front end, and the other end is a rear end; in addition, for the sake of clarity of the description of the present invention, the first anchoring base 4 and the second anchoring base 15 herein have a front-rear direction identical to the corresponding comb plate. The length of the first toothed plate 13 is greater than the length of the second toothed plate 15, and the first toothed plate 13 can span the bridge expansion joint 18.

As shown in fig. 1 and 2, the first anchoring base 4 and the second anchoring base 15 are intended to be fixed to the first bridge body 1 and the second bridge body 2, respectively. Specifically, taking the first anchoring base 4 as an example, the first anchoring base includes a first toothed plate supporting plate 41, a first L-shaped clamping body 43 is arranged on the rear side edge of the first toothed plate supporting plate 41, and a first vertical plate 42 is arranged on the front side edge. The first toothed plate support plate 41, the first L-shaped clamping body 43 and the first vertical plate 42 are integrally formed. Be equipped with anchor bolt cover fixed orifices 17 in the pinion rack backup pad, the top embedding anchor bolt cover fixed orifices 17 of corresponding anchor bolt cover 7 and with pinion rack backup pad welded fastening, be equipped with the screw hole along the axis in the anchor bolt cover 7.

As shown in fig. 2, 4 and 5, in order to fix the first anchoring base 4, the first anchoring base 4 is connected with a long anchoring reinforcement 8 and a short anchoring reinforcement 9, the long anchoring reinforcement 8 and the short anchoring reinforcement 9 are both U-shaped with the opening facing downwards, and the long anchoring reinforcement 8 and the short anchoring reinforcement 9 are welded together and are welded and fixed with the first toothed plate support plate 41 and the first vertical plate 42, and fixed together with the first bridge body 1 through concrete pouring. As shown in fig. 4, 5 and 6, the long anchoring bar 8 passes through the middle of the four anchor bushes 7 and is connected to the first vertical plate 42; the top surface of the short anchor reinforcing steel bars 9 protruding the long anchor reinforcing steel bars 8 can reinforce the asphalt pavement layer 3, and meanwhile, the short anchor reinforcing steel bars 9 are connected with the rear side edge of the first toothed plate supporting plate 41, so that the overall structural strength is favorably improved.

The first tooth plate support plate 41 is horizontally arranged for supporting the first tooth plate 13 of the corresponding side; a toothed plate clamping groove 44 is formed by the first L-shaped clamping body 43 and the first toothed plate supporting plate 41 in a surrounding mode at the rear of the anchoring connecting body; the notch of pinion rack draw-in groove 44 is towards the place ahead, and the vallecular cavity of pinion rack draw-in groove 44 forms the joint space, and the joint space supplies the back tip card of corresponding side fishback to go into, and the top cell wall of pinion rack draw-in groove 44 forms and is used for carrying out spacing vertical limit structure along vertical direction to fishback's back tip. Correspondingly, the rear end of the first toothed plate 13 is provided with a clamping step 131, and the clamping step 131 forms a clamping part; the thickness of the clamping part is smaller than the front side part of the comb plate and is used for being clamped into the clamping space, and the width of the clamping part is larger than the depth of the clamping space. Meanwhile, the first L-shaped clamping body 43 is higher than the first toothed plate support plate 41, so that a paving boundary of the asphalt paving layer 3 is formed, and asphalt is conveniently paved. The first vertical plate 42 is arranged in an L-shape with the first toothed plate support plate 41, and the top of the corresponding side slot wall of the bridge expansion joint 18 is formed by the first vertical plate 42.

As shown in fig. 2 and 6, the second anchoring base 5 has a structure similar to the first anchoring base 4, and includes a second rack support plate 51, a second vertical plate 52, and a second L-shaped snap-in body 53, only the sizes of some parts of which are different.

Through the first anchoring base 4 and the second anchoring base 15 of the above structure, the first toothed plate 13 and the second toothed plate 15 can be completely separated from the concrete. During the assembly, can be directly go into the back tip card of first pinion rack 13 and second pinion rack 15 in pinion rack draw-in groove 44, then use first bolt 6 and second bolt 14 to pass anchor hole 16 on first pinion rack backup pad 41 and the second pinion rack backup pad 51 respectively, threaded connection is fixed to crab-bolt cover 7 on, easy dismounting.

Meanwhile, the top groove wall of the tooth plate clamping groove 44 forms a vertical limiting structure used for limiting the rear end part of the comb plate along the vertical direction, and can assist in bearing the stress of the comb plate. Of course, the closer the width of the tooth plate clamping groove 44 is to the thickness of the clamping step 131 of the comb plate, the smaller the gap between the two is, so as to better share the stress of the first bolt 6 and the second bolt 14. However, since the tooth plate catching groove 44 has a certain depth, a vertical gap between the tooth plate catching groove 44 and the catching step 131 may be appropriately increased in consideration of the convenience of assembly. In addition, when the first tooth plate 13 and the second tooth plate 15 are disassembled, the first tooth plate 13 and the second tooth plate 15 can slide into the tooth plate clamping grooves 44 in the horizontal direction by using the front-back distance existing between the tooth-shaped parts of the first tooth plate 13 and the second tooth plate 15.

The fore-and-aft direction size of the anchoring base corresponding to the second toothed plate 15 is larger than the fore-and-aft direction size of the second toothed plate 15, the tooth profile structure of the first toothed plate 13 is used for supporting the anchoring base corresponding to the second toothed plate 15, a simply supported comb tooth telescopic device is formed, the simply supported comb tooth telescopic device can better reduce the stress of the first bolt 6, and the structural reliability is further ensured.

In addition, the bridge expansion device further comprises a waterproof structure, and the waterproof structure comprises elastic sealant 10, an elastic rubber mold 11 and a water stop belt 12. Horizontal turn-ups are arranged on two sides of the water stop 12 in the horizontal direction, a bridge step 19 is arranged at one end, close to each other, of the first bridge body 1 and the second bridge body 2, the bridge step 19 is provided with an upward horizontal step wall, and the horizontal turn-ups are supported on the horizontal step wall of the bridge step 19. The elastic rubber mold 11 is a rubber foam sponge strip, and the top surface is arc-shaped, so that the thickness of two sides of the elastic rubber mold 11 in the width direction is smaller than that of the middle of the elastic rubber mold in the width direction. The bottom surface of the elastic glue mold 11 is a plane, the elastic glue mold is supported on a horizontal flanging of the water stop belt 12, and the top surface, the first vertical plate 42 and the second vertical plate 52 form a glue pouring groove for pouring glue liquid; the elastic sealant 10 is formed by solidifying glue liquid poured into the glue pouring groove and is used for isolating the upper space from the lower water stop 12, and the glue liquid is made of bi-component polyurethane in the embodiment. The elastic sealant is a composite material consisting of liquid high molecular material, filler, plasticizer and other components, and is a material which forms an elastomer through a curing reaction under the action of a curing agent or air and water; the elastic sealant has two functions of bonding and sealing, and the currently commonly used elastic sealants include polyurethane sealant (divided into single-component sealant and double-component sealant), polysulfide sealant, organosilicon sealant and MS sealant.

The utility model discloses well bridge telescoping device's embodiment 2: the difference between this embodiment and embodiment 1 is that, in this embodiment, as shown in fig. 7 and fig. 8, the top surface of the elastic rubber mold 11 is a corrugated structure, which is substantially a sine wave in this embodiment, the waveform of the corrugated structure extends along the width direction of the bridge expansion joint 18, the corrugated structure has one trough and two peaks, the trough is located in the middle of the bridge expansion joint in the width direction, and the peak is located between the wall of the bridge expansion joint and the trough; correspondingly, the bottom surface of the elastic sealant 10 is matched with the top surface of the elastic rubber mold in shape and is also of a corrugated structure, in the forming process of the elastic sealant 10, an auxiliary forming mold is arranged on the top surface of the elastic sealant 10 and is arranged in a manner of being aligned with the bridge expansion joint 18, the shape of the middle part of the bottom surface of the auxiliary forming mold is the same as that of the middle part of the top surface of the elastic rubber mold 11 and is used for forming the middle part of the top surface of the elastic sealant 10, and the part, located between two wave crests of the corrugated structure, of the top surface of the elastic sealant 10 is parallel to the bottom surface; after the glue solution poured into the glue pouring groove is solidified, the auxiliary forming die is removed, so that the elastic sealant 10 is of a corrugated structure as a whole.

Like this, sealed glue 10 of elasticity receives the extrusion back along bridge expansion joint 18's width direction, and the mid portion can the bending deformation downwards, is favorable to the structural deformation, can adapt to the flexible of bridge expansion joint better, avoids upwards warping and produces the friction with the fishback.

In addition, in the embodiment, the top surfaces of the parts of the elastic sealant 10 along the two sides of the bridge expansion joint 18 in the width direction are planes, so that the two sides of the elastic sealant 10 in the width direction can have thicker thickness, and the elastic sealant can be firmly bonded with the wall of the bridge expansion joint, so that the sealing performance and the structural strength are improved; meanwhile, the elastic rubber mold 11 on the lower layer of the elastic sealant 10 can provide a deformation space for the elastic sealant 10, and can assist in the restoration of the deformed structural sealing layer formed by the elastic sealant 10.

In other embodiments, the corrugated structure may have other waveforms, such as isosceles triangle wave, isosceles trapezoid wave, etc.; in the case of a larger width of the bridge expansion joint 18, the corrugated structure may have more troughs and more crests. The utility model discloses well bridge telescoping device's embodiment 3, this embodiment and embodiment 1's difference lie in, in this embodiment, the anchor connector on the anchor base is anchor bolt, and anchor bolt fixes in the pinion rack backup pad, correspondingly ground, and anchor hole 16 on the pinion rack is the counter bore to this counter bore is the slot hole of extending from beginning to end, and pinion rack anchor assembly is the nut, and nut and anchor bolt adaptation can pack into in the counter bore.

The utility model discloses well bridge telescoping device's embodiment 4, this embodiment and embodiment 1's difference lie in, in this embodiment, L shape joint body protrusion sets up at the middle part of pinion rack backup pad, and welded fastening is in the pinion rack backup pad. Of course, in other embodiments, the thickness of the rear portion of the tooth plate supporting plate may also be increased, a boss is formed at the rear portion of the tooth plate supporting plate, and a slot is provided on the front side surface of the boss as the tooth plate clamping slot 44.

The utility model discloses well bridge telescoping device's embodiment 5, this embodiment and embodiment 1's difference lie in, and in this embodiment, the width of the joint part of fishback is less than the degree of depth in the joint space that the vallecular cavity of pinion rack draw-in groove 44 formed, can rely on the leading flank of the L shape joint body to realize the location.

The utility model discloses well bridge telescoping device's embodiment 6, this embodiment and embodiment 1's difference lie in, and in this embodiment, the fishback is the uniform thickness structure, and after pinion rack draw-in groove 44 was gone into to its rear portion card, can set up the layer of mating formation in the fishback top, avoids locating to form at bridge telescoping device and caves in and influence the steady passing through of vehicle.

The utility model discloses well bridge telescoping device's embodiment 7, this embodiment and embodiment 1's difference lie in, and in this embodiment, the fishback is cantilever type structure, specifically can refer to among the background art CN104452581A the chinese patent application disclose a cantilever base spiral shell anchor formula fishback telescoping device.

The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.

Claims

1. The bridge expansion device comprises a comb plate and an anchoring base, wherein the comb plate comprises a first tooth plate and a second tooth plate, and the first tooth plate and the second tooth plate are respectively used for being fixed on the respective corresponding anchoring base;

the front end of each comb plate is provided with a tooth-shaped structure, and the rear end of each comb plate is provided with an anchoring hole;

it is characterized in that the preparation method is characterized in that,

2. The bridge expansion device of claim 1, wherein the back end of the comb plate is provided with a clamping step, and the clamping step forms a clamping part;

3. The bridge expansion device of claim 2, wherein the width of the clamping portion is greater than the depth of the clamping space.

4. The bridge expansion device according to any one of claims 1 to 3, wherein the anchoring base comprises a toothed plate support plate arranged horizontally for supporting a comb plate of the respective side;

5. The bridge expansion device of claim 4, wherein the L-shaped clamping body is integrally formed with the toothed plate support plate.

6. The bridge expansion device of claim 4, wherein the vertical portion of the L-shaped clip body is connected to the rear side edge of the toothed plate support plate.

7. The bridge expansion device according to any one of claims 1 to 3, wherein the front-back direction dimension of the anchoring base corresponding to the second toothed plate is larger than the front-back direction dimension of the second toothed plate, and the tooth-shaped structure of the first toothed plate is used for being supported on the anchoring base corresponding to the second toothed plate to form a simply supported comb expansion device.

8. A bridge expansion device according to any one of claims 1 to 3, wherein the toothed plate anchor is a bolt and the anchor connection is an anchor sleeve; the bolt is used for downwards penetrating through the anchoring hole in the comb plate and is in threaded connection with the anchor bolt sleeve.

9. The bridge expansion device of claim 8, wherein the anchoring base comprises a toothed plate support plate, which is horizontally arranged for supporting the comb plate of the respective side;