CN211113161U - Connecting mechanism of telescopic device - Google Patents

Abstract

The utility model belongs to the structure and the construction of public road bridge roof beam telescoping device especially indicate telescoping device's coupling mechanism. The beam end or bridge head concrete structure with embedded parts embedded in the expansion joint comprises embedded parts which are embedded in the concrete structure at the bottom of a reserved groove arranged at the beam end or the bridge head at intervals and assembled with the anchoring ribs of the expansion device through lap joint ribs; the embedded part is integrally embedded in a concrete structure at the bottom of the preformed groove, the top of the embedded part is not higher than the bottom surface of the inner cavity of the preformed groove, the top of the embedded part comprises an assembling part which can form fixed assembly with the anchoring rib and/or a connecting plate which is fixed with the anchoring rib and can form fixed assembly with the anchoring rib, and a horizontal reinforcing steel bar is connected with the lap joint part of the lap joint rib and the anchoring rib in a crossing manner. The utility model discloses effectively solved among the prior art telescoping device construction period long and the big scheduling problem of the construction degree of difficulty, had the construction degree of difficulty and intensity little, construction speed is fast, be convenient for advantage such as standardized production.

Description

Connecting mechanism of telescopic device

Technical Field

The utility model belongs to the structure and the construction of public road bridge roof beam telescoping device especially indicate telescoping device's coupling mechanism.

Background

The expansion device is an indispensable part on the bridge structure regardless of the bridge of any specification, and is the weakest link on the bridge structure in order to adapt to the joint change caused by factors such as the temperature change of a beam, the shrinkage caused by creep and shrinkage of concrete, the rotation of a beam end, the deflection of the beam and the like and directly bear the repeated load of wheels in the bridge structure. The mounting quality of the highway bridge expansion device has important significance for guaranteeing the service performance of the bridge, improving the driving comfort level and guaranteeing the service quality of the highway bridge. Expansion joints are gaps in the upper structure of the bridge structure to accommodate the deformation of the bridge structure, as required by road bridge expansion devices (JT/T327 & 2016). The expansion device for highway bridge is a general name of various devices which are arranged at the expansion joint and composed of rubber, steel and other members, so that vehicles can stably pass through the bridge floor and meet the requirement of deformation of the upper structure of the bridge. In the above-mentioned industry standards, the classification, processing, technical performance, transportation and storage of the expansion device for highway bridges are described in detail, and a large amount of documents in the prior art have made clear requirements for the installation and construction of the expansion device. The installation of the conventional highway bridge expansion device is generally carried out according to the following steps: firstly, bridge deck pavement: filling materials or fillers into the expansion joints and the reserved grooves, and then paving the bridge deck on the surfaces of the fillers, the beams or the bridge heads to form a pavement layer; secondly, grooving of a cutting seam: marking a side line of the preformed groove according to the measurement requirement, cutting a pavement layer in the preformed groove by using an asphalt concrete cutting and sewing machine, removing fillers and the pavement layer in the cut, roughening the concrete surface on the side wall and the bottom of the preformed groove, and cleaning impurities; thirdly, positioning and welding: arranging a telescopic device in the notch, penetrating a transversely arranged connecting rib, adjusting the height and the straightness of the telescopic device to meet the requirements, and welding and fixing the anchoring rib of the telescopic device and the pre-embedded anchoring steel bar; fourthly, installing a template and pouring: cleaning the reserved grooves, filling the expansion joints with foamed plastic, additionally arranging templates on two sides of the expansion joints to prevent concrete from entering the expansion joints during pouring and vibrating, pouring the concrete into the reserved grooves on two sides of the templates, and vibrating and leveling; fifthly, sealing strip installation and maintenance: cleaning related parts, installing sealing strips, curing the concrete until the strength of the concrete meets the requirement, and opening the traffic.

The above-described conventional mounting method has the following problems: firstly, according to the construction requirement, the pre-buried bar can not crack, break and lose, and the steel bar with crack and break can be repaired or planted according to the welding requirement in time, and the bent pre-buried bar can be straightened. Because the lower part of the existing embedded rib is fixed in the concrete structure at the lower part of the preformed groove, and the upper part of the embedded rib forms a convex door-shaped structure in the preformed groove, the upper part of the embedded rib which protrudes out is bent or broken due to careless operation or processing error in practice, the construction time is delayed, and the construction cost is improved; sundries (particularly, the sundries such as asphalt on the surface of the embedded rib are difficult to remove) are easy to accumulate between the embedded rib protruding from the upper part and the preformed groove, and the sundries in the preformed groove are cleaned before the telescopic device is installed, and the embedded rib is usually slowly excavated by a special tool with a sharp front end, so that the construction difficulty and the strength are high, the sundries are difficult to clean, and the construction period is long; thirdly, if the upper part of the embedded rib is ultrahigh, the embedded rib needs to be cut off, so that unnecessary trouble is caused to construction; fourthly, when the multiple beams are spliced, due to the fact that errors exist when the beam pieces are prefabricated and hoisted in place, the widths of the reserved grooves and the expansion joints are different, and due to the influence of the protruding embedded ribs, the expansion joints can not be simply covered by the cover plates when the bridge deck is paved, then the cover plates are covered with fillers, and construction is complicated, labor intensity is high, and construction time is long when sundries in the embedded grooves are cleaned before the expansion device is installed.

The applicant does not find patent documents in domestic patent databases which are the same as or similar to those of the present invention, and the research on the expansion device is mainly focused on the structural improvement of the expansion device itself.

The prior art shows that improvement on the connecting mechanism and the construction process of the conventional highway bridge expansion device is imperative to improve the construction speed and the construction quality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coupling mechanism of telescoping device can effectively realize accelerating public road bridge roof beam telescoping device construction and installation progress, improvement construction quality.

The whole technical concept of the utility model is that:

the connecting mechanism of the telescopic device comprises embedded parts which are embedded in a concrete structure at the bottom of a preformed groove arranged at the beam end or the bridge head at intervals and are assembled with the anchoring ribs of the telescopic device through lap joint ribs; the embedded part is integrally embedded in a concrete structure at the bottom of the preformed groove, the top of the embedded part is not higher than the bottom surface of the inner cavity of the preformed groove, the top of the embedded part comprises an assembling part which can form fixed assembly with the anchoring rib and/or a connecting plate which is fixed with the anchoring rib and can form fixed assembly with the anchoring rib, and the lapping part of the lapping rib and the anchoring rib of the telescopic device is connected with a horizontal reinforcing steel bar in a crossing manner.

The specific technical concept of the utility model is that:

in order to realize the standardized assembly of the embedded part and simultaneously facilitate the improvement of the anchoring strength of the embedded part, the preferable technical scheme is that the side part or the bottom part of the embedded part is connected with a fixed frame or a concrete internal reinforcing steel bar arranged in a concrete structure at the bottom of the preformed groove.

The fixed of built-in fitting and mount or the inside reinforcing bar of concrete can adopt multiple current fixed mode to realize, all do not break away from the technical essence of the utility model, including but not being restricted to adopting following technological means, lateral part or the bottom of built-in fitting adopt one or combination among welding, ligature connection, quick-connect buckle dress, screw connection, bolted connection with mount or the inside reinforcing bar of concrete of locating in the reserve tank bottom concrete structure.

In order to increase the assembling reliability of the connecting plate and the adjacent component, the preferable technical implementation means is that the connecting plate is of a strip-shaped sheet structure.

The fixing of the anchoring rib, the overlapping rib and the connecting plate can be realized by various technologies, including but not limited to, adopting one or a combination of welding, screws, bolts and integrated molding for fixing the anchoring rib and the connecting plate or the assembling part through the overlapping rib.

In order to facilitate processing and reliable connection of parts and components and simultaneously meet the requirement of uniform stress of the telescopic device and the concrete structure, the preferable technical implementation means is that the embedded parts are arranged in parallel at intervals in the concrete structure at the bottom of the reserved groove formed at the beam end or the bridge head, and the applicant needs to explain that the embedded parts are embedded in the concrete structure at the bottom of the reserved groove formed at the beam end or the bridge head at intervals in parallel, namely the included angle between the embedded parts and the horizontal direction is α, and α is more than or equal to 0 degree and less than or equal to 180 degrees.

On the premise of meeting actual requirements, in order to adapt to the error requirements in production, processing and assembly links, the preferable technical implementation means is that the distance between the top of the embedded part and the bottom surface of the inner cavity of the preformed groove is D, and D is more than or equal to 0 and less than or equal to 10 mm. Even if the top of the embedded part is lower than the bottom surface of the inner cavity of the preformed groove, the top of the embedded part can be conveniently observed and found by people, and a universal appliance (such as a hammer head) is adopted to knock off floating ash on the top of the embedded part to expose the assembly part, otherwise, if the top of the embedded part is slightly higher than the bottom surface of the inner cavity of the preformed groove due to the inserting, fixing, cement curing and other reasons, the installation of the telescopic device cannot be influenced due to the exposure of individual embedded part; the adjustment of the above technical structure does not depart from the protection scope of the utility model.

More preferably, the technical implementation means is that D is more than or equal to 0 and less than or equal to 5 mm.

The applicant needs to state that:

in the description of the present invention, the terms "top", "bottom", "side", "bottom", "lateral", "bar", "sheet", "side wall", "both sides" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of simplifying the description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

To the extent that the applicant knows, relevant indexes and methods for verifying the technical effects of the present invention are not recorded in the existing national standards and industry standards. For verifying the technical effect of the utility model, the applicant has carried out the following tests:

firstly, test items: and (3) performing entity construction test on the embedded part special for the expansion joint.

II, testing time: 8 and 12 months in 2019.

Thirdly, testing site: ningbo Xiangshan, the new bridge connects the test section.

Fourthly, the participants: geminggang; taking care of the heaven; tension wave; jianpeng flying; preparing Weichun crystal; zhao Jie; high Jianhua; guo le; and (5) Huhui.

Fifthly, testing purposes: and counting and calculating data in the aspects of construction method, construction working hour, labor cost and the like of the special embedded part. On the premise of equal construction quality, the construction method is compared with the existing product structure and construction method.

Sixthly, testing steps

1. And (4) reserving grooves in the precast beam body. When the concrete for pouring the beam is not solidified, the embedded part in the utility model is inserted, and the top of the embedded part is flush with the bottom surface of the inner cavity of the preformed groove, the parallel distance is 250mm, and the distance is consistent with the anchoring rib distance of the telescopic device;

2. covering the expansion joint with a long wood plate at the bottom of the preformed groove to prevent impurities from entering; then filling sand bags into the reserved grooves, and paving the bridge deck when the backfilling height is consistent with the height of the bridge deck concrete;

3. determining the position of the expansion joint, accurately marking according to the size of a drawing, accurately sawing a bridge deck pavement layer according to the marked line by using a cutting machine, and timely cleaning by using water;

4. and taking out the sandbags and sundries falling in the gaps of the sandbags, wherein a small amount of concrete attached to the surfaces of the embedded parts can be knocked off. And checking whether the embedded parts are complete and correspond to the anchoring ribs of the telescopic device. Roughening the side wall and the bottom of the preformed groove and cleaning;

5. checking the size of the clearance of the profile steel of the telescopic device, adjusting the positioning value during installation, and fixing by using a special fixture;

6. installing a hanger and hanging the telescopic device into the groove pit, adjusting the central line of the telescopic device to coincide with the central line of the expansion joint, corresponding the anchoring ribs of the telescopic device to the positions of the embedded parts one by one, and adjusting the elevation of the telescopic device to enable the elevation of the top surface of the telescopic device to be consistent with the design requirement; connecting the anchoring ribs and the embedded parts of the telescopic device by using the lap joint ribs, immediately putting the horizontal reinforcing steel bars in a penetrating way, and loosening the fixture to enable the fixture to freely stretch and retract;

7. sealing the top surface seam of the expansion device by using a foam strip, installing a beam end template, pouring C50 premixed concrete in the preformed groove, and filling and tamping;

8. and (4) watering by mulching, cleaning the cavity and embedding the waterproof rubber strip when the concrete reaches more than 80% of the design strength. And opening the traffic when the strength of the concrete reaches the design requirement.

Seventh, conclusion of the experiment

1. Because the interior of the reserved groove is flat and has no reinforcing mesh, a sandbag or a large whole filler can be used for filling, and compared with the prior art, the cleaning by using granular bulk fillers such as bulk sand, construction waste and the like is more convenient, no dust is scattered, and the environmental protection is enhanced;

2. the pre-buried ribs are flat and have no protrusions in the reserved grooves, so that the whole pre-buried ribs can be cleaned by a general large tool, the time for cleaning sundries in the pre-buried ribs by a small tool during groove cleaning is saved, and the cleaning work is simpler, more convenient and faster;

3. because the pre-buried ribs do not protrude in the pre-reserved grooves, the work of straightening the bent pre-buried ribs, adjusting the space between the pre-buried ribs, planting the ribs and the like is omitted; the strip-shaped steel plate at the top of the embedded part increases the connecting size of the embedded part, and when the anchoring ribs of the telescopic device deviate from the position of the embedded part, the contact area is increased, so that the positioning of the telescopic device is convenient to realize;

4. the strip-shaped steel plate at the top of the embedded part increases the anchoring area and improves the connection reliability with the anchoring rib of the telescopic device;

to sum up, through the applicant calculate statistics, adopt under the prerequisite of equal construction quality the utility model discloses a structure and technology and current product and construction method contrast, effectively save the engineering time 3 times, and need not be with the help of specialized tool during the construction, and the work efficiency increases substantially and the feature of environmental protection is better.

The technical progress of the utility model lies in:

1. the utility model discloses a with the built-in fitting top not higher than the structural design of reservation tank inner chamber bottom surface, because reservation tank inner chamber bottom surface roughness is high, can adopt conventional instrument to go miscellaneous cleaning to its inner chamber, the construction progress can increase substantially when guaranteeing the reservation tank inner chamber and go miscellaneous effect.

2. The bottom surface of the inner cavity of the reserved groove has better flatness, so that sundries can be prevented from entering the expansion joint by covering the cover plate on the surface of the expansion joint when the bridge deck pavement layer is constructed, and the pavement construction progress is greatly accelerated compared with the expansion joint assembled by a plurality of beams by adopting the existing construction method; secondly, the difficulty in cleaning sundries in the telescopic joint before the telescopic device is constructed is reduced, and the cleaning speed is accelerated; thirdly, the workpiece damage phenomenon caused by the bending or the breaking of the upper part of the anchoring part and the straightening or bar repairing process of the anchoring part caused by the workpiece damage phenomenon can be avoided, the construction process is simplified, and the failure rate is low; and fourthly, as the reserved steel bars are flat in the reserved groove and have no door-shaped structure, sand bags or large whole fillers can be used for filling, and compared with the prior art, the cleaning by using granular bulk fillers such as loose sand, construction waste and the like is more convenient, no dust is scattered, and the environmental protection is enhanced.

3. By adopting the structural design that the top of the embedded part is provided with the assembly part which is in adaptive connection with the anchoring rib of the telescopic device, when the effective connection with the anchoring rib of the connecting plate and the telescopic device is ensured, the quick construction can be realized by conveniently adopting the conventional method of inserting the embedded part into the beam fixed with the fixed frame or to be poured when the concrete of the beam is not solidified, even if a small amount of concrete is attached to the surface of the embedded part, the embedded part can be conveniently removed by common mechanical modes such as hard object knocking and the like, the construction difficulty is small, and the standardized production is convenient to realize.

4. The structural design that the connecting plate is fixed at the top of the embedded part increases the surface area of the embedded part, further improves the connection reliability of the anchoring rib of the telescopic device, and is convenient for adjusting the connection position of the anchoring rib and the embedded part.

5. Because the embedded part is integrally embedded in the reserved groove concrete structure, the bottom surface of the reserved groove has high flatness, and the straightness accuracy adjustment is easier during the installation and construction of the telescopic device.

6. Through the applicant's experiment, adopt the utility model provides a structure and construction method compare current product structure and construction method, under the prerequisite of equal construction quality, can effectively save the engineering time 3 times and need not be with the help of specialized tool, and the work efficiency improves by a wide margin.

Drawings

Fig. 1 is a schematic structural view of the middle telescopic device connecting mechanism of the present invention when the installation is finished and concrete is not poured.

Fig. 2 is a schematic structural view of a finished pavement layer without a telescopic device.

Fig. 3 is a schematic view of an exposed expansion joint structure of an embedded part after cast-in-place splicing of a plurality of conventional beams.

Fig. 4 is a view from a-a in fig. 3.

Fig. 5 to 7 are schematic distribution diagrams of embedded parts of different structures in a reserved groove concrete structure.

Fig. 8 and 10 are schematic structural diagrams of embedded parts and connecting plates with different structures.

Fig. 9 is a top view of fig. 8.

Fig. 11 is a top view of fig. 10.

FIG. 12 is a schematic view of the installation of the embedment member orthogonal to the telescoping device.

FIG. 13 is a schematic view of an embedment and a telescoping device installed in an oblique manner.

The reference numbers in the drawings are as follows:

1. fixing frame or concrete internal reinforcing steel bar; 2. a paving layer; 3. horizontal reinforcing steel bars; 4. an anchoring rib of the telescoping device; 5. reserving a groove; 6. a connecting plate; 7. embedding parts; 8. a cover plate; 9. a filler; 10. and (5) overlapping the ribs.

Detailed Description

The present invention is further described with reference to the following examples, which should not be construed as limiting the scope of the present invention, but the scope of the present invention is defined by the following claims, and any equivalent technical means made according to the description should not be construed as departing from the scope of the present invention.

The overall structure of the embodiment is shown in the figure, and the connecting mechanism of the expansion device comprises embedded parts 7 which are embedded in a concrete structure at the bottom of a reserved groove 5 arranged at the beam end or the bridge head at intervals and assembled with the anchoring ribs 4 of the expansion device through lap joint ribs 10; the whole embedded part 7 is embedded in the concrete structure at the bottom of the preformed groove 5, the top of the embedded part 7 is not higher than the bottom surface of the inner cavity of the preformed groove 5, the top of the embedded part 7 comprises an assembling part which can form fixed assembly with the anchoring rib 4 and/or a connecting plate 6 which is fixed with the anchoring rib 4 and can form fixed assembly, and the lapping part of the lapping rib 10 and the anchoring rib 4 of the telescopic device is connected with the horizontal reinforcing steel bar 3 in a crossing manner.

The side part or the bottom of the embedded part 7 is welded with a fixed frame or a concrete internal reinforcing steel bar 1 arranged in a concrete structure at the bottom of the preformed groove 5; as shown in fig. 1.

The connecting plate 6 is of a strip-shaped sheet structure; as shown in fig. 8-11.

The anchoring ribs 4 are fixed with the connecting plate 6 or the assembling part through the lap joint ribs 10 by adopting one or combination of welding, screws, bolts and integrated molding; as shown in fig. 5-11.

The embedded parts 7 are arranged in parallel at intervals in a concrete structure at the bottom of the reserved groove 5 arranged at the beam end or the bridge head; as shown in fig. 12 and 13.

The distance between the top of the embedded part 7 and the bottom surface of the inner cavity of the preformed groove 5 is D, and D is more than or equal to 0 and less than or equal to 10 mm.

The application of the connecting mechanism of the expansion device in the installation and construction of the expansion joint device comprises the following steps:

A. bridge deck pavement

Placing a cover plate 8 at the bottom of the reserved grooves 5 at two sides of the expansion joint to prevent impurities from entering, placing a filler 9 in the reserved grooves 5 on the surface of the cover plate 8, and then paving the bridge deck on the filler 9 and the surface of the beam or the bridge head to form a pavement layer 2; as shown in fig. 2;

B. joint cutting slot

Marking a side line of the preformed groove according to the measurement requirement, cutting the pavement layer 2 in the preformed groove 5 by using an asphalt concrete cutting and sewing machine, removing the filler 9 and the pavement layer 2 in the cut, roughening the side wall and the bottom surface of the preformed groove 5, and cleaning impurities; as shown in fig. 1;

C. in place and welded

Checking the size of the clearance of the profile steel of the telescopic device, adjusting the positioning value during installation, and fixing by using a special fixture; arranging the telescopic device in the notch, enabling the anchoring rib 4 of the telescopic device to correspond to the embedded part 7, adjusting the height and the straightness of the telescopic device to meet the requirements, welding the anchoring rib 4 of the telescopic device and the embedded part 7 by using a lap joint rib 10, immediately putting a horizontal reinforcing steel bar 3 at the lap joint part of the lap joint rib 10 and the anchoring rib 4 of the telescopic device, and loosening a fixture to enable the horizontal reinforcing steel bar 3 to freely stretch and retract; as shown in fig. 1;

D. installing formwork and pouring

Cleaning the reserved slots 5 and filling the expansion joints with foamed plastic, additionally arranging templates on two sides of the expansion joints to prevent concrete from entering the expansion joints during pouring and vibrating, pouring the premixed concrete into the reserved slots 5 on two sides of the templates and then vibrating and leveling;

E. installing sealing strip and maintaining

Cleaning related parts, installing sealing strips, curing the concrete until the strength of the concrete meets the requirement, and opening the traffic.

And C1, after the step C or simultaneously with the height and straightness adjustment of the telescopic device in the step C, and the step C1 is to splice the segmented telescopic devices into a whole in an end-to-end manner.

Claims (8)

1. The connecting mechanism of the telescopic device comprises embedded parts (7) which are embedded in a concrete structure at the bottom of a reserved groove (5) arranged at the beam end or the bridge head at intervals and are assembled with the anchoring ribs (4) of the telescopic device through lap joint ribs (10); the concrete structure is characterized in that the embedded part (7) is integrally embedded in a concrete structure at the bottom of the preformed groove (5), the top of the embedded part (7) is not higher than the bottom surface of an inner cavity of the preformed groove (5), the top of the embedded part (7) comprises an assembling part capable of forming fixed assembly with the anchoring rib (4) and/or a connecting plate (6) capable of forming fixed assembly with the anchoring rib (4), and the lapping part of the lapping rib (10) and the anchoring rib (4) is connected with a horizontal reinforcing steel bar (3) in a crossing manner.

2. The connecting mechanism of the telescopic device according to claim 1, characterized in that the side or the bottom of the embedded part (7) is connected with a fixed frame or a concrete internal reinforcing steel bar (1) arranged in a concrete structure at the bottom of the preformed groove (5).

3. The connecting mechanism of the telescopic device according to claim 2, characterized in that the side or the bottom of the embedded part (7) and the fixed mount or the concrete internal steel bar (1) arranged in the concrete structure at the bottom of the preformed groove (5) adopt one or a combination of welding, binding connection, snap fastener fastening, screw connection and bolt connection.

4. A mechanism according to claim 1, wherein the connecting plate (6) is of a strip-like sheet-like configuration.

5. The coupling mechanism of a telescopic device according to claim 1, characterized in that the anchoring ribs (4) are fixed to the connecting plate (6) or the fitting part by the overlapping ribs (10) by one or a combination of welding, screws, bolts, and integral molding.

6. The connecting mechanism of the telescopic device according to claim 1, characterized in that the embedded parts (7) are arranged in parallel at intervals in a concrete structure at the bottom of the preformed groove (5) arranged at the beam end or the bridge head.

7. The connecting mechanism of the telescopic device according to any one of claims 1 to 6, wherein the distance between the top of the embedded part (7) and the bottom surface of the inner cavity of the preformed groove (5) is D, and D is more than or equal to 0 and less than or equal to 10 mm.

8. The connecting mechanism of a telescopic device according to claim 7, wherein D is more than or equal to 0 and less than or equal to 5 mm.

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