CN115787455A

CN115787455A - Integral type telescopic device for highway bridge and construction method thereof

Info

Publication number: CN115787455A
Application number: CN202211519432.4A
Authority: CN
Inventors: 杨晓光; 杨大海; 谢玉萌; 熊亮; 吴志刚; 连俊峰; 桂永全; 殷涛; 殷亮; 杨凯; 周云; 王倩; 朱俊
Original assignee: Anhui Transport Consulting and Design Institute Co Ltd
Current assignee: Anhui Transport Consulting and Design Institute Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-03-14

Abstract

The invention discloses an integral type telescopic device for a highway bridge and a construction method thereof, which consists of a spring seam crossing plate, an embedded steel plate and a water guide device; the spring seam crossing plate is an elastic plate body integrally formed by nano carbon fiber reinforced polyurethane materials, two ends of the elastic plate body are respectively anchored on the first side beam end and the second side beam end through anchor bolts, the elastic plate body is provided with a section of spring plate area and a section of seam crossing plate area, the spring plate area is positioned on the first side beam end, and the seam crossing plate area crosses a beam end gap; the embedded steel plate is embedded at the bottom of the seam crossing plate area and spans the beam end gap; the spring plate area is formed by all spring units which are arranged in parallel, and the spring units are of flexible hinge telescopic structures of broken line connecting rods; the water guide device is arranged below the spring seam crossing plate and is positioned at the position of the beam end gap. The invention has better anti-seismic performance, effectively reduces noise and realizes quick construction and replacement.

Description

Integral type telescopic device for highway bridge and construction method thereof

Technical Field

The invention relates to the technical field of bridge expansion devices and construction thereof, in particular to a highway bridge integral expansion device and a construction method thereof.

Background

The bridge expansion device is an indispensable part in bridge construction, and is required to adapt to the temperature change of a bridge, the shrinkage caused by creep and shrinkage of concrete, and joint change caused by factors such as corners of beam ends, beam deflection and the like in a bridge structure. It directly bears the repeated load of the wheel, is the weakest link in the bridge structure, and is therefore the most vulnerable part.

The defects of the bridge expansion device in structural design and construction can not only influence the comfort of a passerby due to vibration and noise, but also directly influence the normal use of the bridge and the service life of the bridge. The bridge expansion device with the same excellent performance has different construction and installation qualities, and the using effect and the durability also have obvious differences, so the excellent construction and installation qualities are key links for ensuring the using effect of the bridge expansion device. Along with the development of economy, the scale of bridge construction is continuously enlarged, the using amount of the bridge expansion device is larger and larger, the using range is wider and wider, and higher requirements are provided for the bridge expansion device on the anti-seismic performance and the rapidness degree of a construction method.

Disclosure of Invention

The invention provides a highway bridge integral type expansion device and a construction method thereof, aiming at avoiding the defects in the prior art, so as to obtain better anti-seismic performance, reduce noise and realize quick construction and replacement.

The invention adopts the following technical scheme for realizing the purpose of the invention:

the integral expansion device for the highway bridge is structurally characterized by comprising a spring seam crossing plate, an embedded steel plate and a water guide device; the spring seam crossing plate is an elastic plate body integrally formed by nano carbon fiber reinforced polyurethane materials, two ends of the elastic plate body are respectively anchored on the first side beam end and the second side beam end through anchor bolts, the elastic plate body is provided with a section of spring plate area and a section of seam crossing plate area, the spring plate area is positioned on the first side beam end, and the seam crossing plate area crosses a beam end gap; the embedded steel plate is embedded at the bottom of the seam crossing plate area and spans a beam end gap; the spring plate area is formed by connecting all spring units in parallel, and the spring units are of flexible hinge telescopic structures of broken line connecting rods; the water guide device is arranged below the spring seam crossing plate and is positioned at the position of the beam end gap.

The integral expansion device for the highway bridge is also characterized in that: the spring seam crossing plate is manufactured in sections, and the length of each section is 1-3m; the embedded steel plate is a rectangular steel plate with the thickness not less than 20 mm.

The integral expansion device for the highway bridge is also characterized in that: first side beam-ends and second side beam-ends are equipped with threaded sleeve respectively, and anchor bolt threaded connection is in the threaded sleeve on the corresponding position threaded sleeve's lower extreme is equipped with the tip through-hole horizontal reinforcing bar has been inserted in the tip through-hole, horizontal reinforcing bar and the reinforcing bar spot welding in the expansion joint notch are connected.

The construction method of the integral expansion device for the highway bridge is characterized by comprising the following steps:

step 1, placing anchor bolts in through holes of the spring seam crossing plate, connecting the anchor bolts in threaded sleeves, and inserting horizontal steel bars into the through holes at the bottom ends of the threaded sleeves;

step 2, fixing and arranging channel steel on the spring seam crossing plate by adopting self-tapping screws, wherein the length of the channel steel is greater than the width of a notch of the telescopic device, and assembling the integral telescopic device;

step 3, accurately marking the mounting position of the telescopic device at the position of the beam end notch where the telescopic device needs to be mounted, cutting according to a cutting line to form a notch, and manufacturing a template according to the shape and the size of the notch of the spring seam crossing plate;

and 4, step 4: two ends of the channel steel are respectively erected on the road surfaces at two sides of the opening of the expansion joint, so that the plate body of the spring seam crossing plate keeps straight on the opening; connecting the horizontal steel bars 12 inserted into the through holes at the bottom end of the threaded sleeve with the embedded steel bars in the notch in a spot welding manner to finish fixing;

and 5: and pouring concrete in the template, and vibrating by using a flat vibrator before the concrete is initially set, wherein the vibrating sequence is from inside to outside, so that redundant concrete is extruded out of the telescopic device until the telescopic device is installed to a designed height.

Step 6: and coating thread fastening glue on the anchor bolt, screwing the anchor bolt into the thread sleeve, and screwing the anchor bolt to a set torsion value.

And 7: fully filling and sealing the anchor bolt holes by using elastic asphalt crack pouring glue, and enabling the elastic asphalt crack pouring glue to be flush with the plate surface of the spring crack spanning plate to finish the installation of the integral type expansion device;

and 8: covering, heat preservation and health preservation are carried out aiming at the notch concrete, and after the concrete strength reaches the design requirement, the traffic can be opened.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention has low noise and environmental protection, the integral expansion device distinguishes the spring plate area and the seam crossing plate area embedded with the steel plate, and takes rigidity and flexibility into consideration, and the integral elastic module spans the gap of the bridge expansion joint, thereby not only ensuring the continuity of the road surface and leading the vehicle to smoothly pass, but also effectively absorbing the vibration and impact force generated by driving, reducing the noise of the vehicle passing through the expansion device, having good performances of comfortable driving, no vehicle jumping and low noise, and effectively prolonging the service life of the bridge.

2. The invention can be self-adaptive to multidirectional flexible displacement, the spring plate area of the integral type telescopic device is integrally formed into a flexible structure of the flexible hinge of the broken line connecting rod by elastic materials, and the use function requirement of the self-adaptive multidirectional flexible displacement is realized by arranging the broken line connecting rod and the flexible hinge and adjusting the number of the flexible hinges.

3. The device has a good anti-seismic function, and bridges on two sides of the expansion joint are limited by special bridge anti-seismic supports in an earthquake, so that the bridges are prevented from sliding off piers. The integral telescopic device has an anti-seismic function which is not possessed by other types of telescopic devices. Because the flexible hinge of the broken line connecting rod has strong geometric deformability, the load between two ends of the bridge can be effectively weakened to be mutually transferred, the bridges on two sides are connected together to form a mechanical load transfer attenuation damper, and therefore the flexible hinge has a good anti-seismic function and improves the safety of the bridge.

4. The construction process is simple and quick, the construction and technical requirements are greatly simplified by a quick construction mode at normal temperature, the construction efficiency is improved, the traffic service condition can be achieved in a short time, the influence on the operation of daily traffic facilities is reduced, the method is particularly suitable for quick installation and maintenance engineering of expansion devices such as urban elevated bridges, expressways and the like, has the advantages of energy conservation and environmental protection, and is suitable for popularization and application.

Drawings

FIG. 1 is a schematic view of an integral retractor of the present invention;

FIG. 2 is a schematic plan view of a spring seam crossing plate in the integrated retractor of the present invention;

FIGS. 3 and 4 are schematic views illustrating the construction process of the integral type telescopic device according to the present invention;

FIG. 5 is a schematic view of the flexible hinge of the middle broken-line connecting rod of the spring plate according to the present invention;

FIG. 6 is a schematic view of the structure of the anchor bolt closed by the thread fastening glue according to the present invention.

The reference numbers in the figures: 1 spring strides seam board, 2 embedded steel sheets, 3 water guide device, 4a spring board district side anchor bolt, 4b strides seam board district side anchor bolt, 5 spring units, 6 embedded steel bars, 7a first side beam-ends, 7b second side beam-ends, 8 stride seam board district, 9 spring board district, 10 beam-ends clearance, 11a spring board district side screw sleeve, 11b strides seam board district side screw sleeve, 12 horizontal steel bars, 13 channel-section steel, 14 cutting lines, 15 notch concrete, 16 elasticity pitch crack pouring glues.

Detailed Description

Referring to fig. 1 and 2, the integral expansion device for the highway bridge in the embodiment is composed of a spring seam crossing plate 1, an embedded steel plate 2 and a water guide device 3; the spring seam crossing plate 1 is an elastic plate body integrally formed by nano carbon fiber reinforced polyurethane materials, two ends of the elastic plate body are respectively anchored on a first side beam end 7a and a second side beam end 7b through anchor bolts, the elastic plate body is provided with a section of spring plate area 9 and a section of seam crossing plate area 8, the spring plate area 9 is positioned on the first side beam end 7a, and the seam crossing plate area 8 crosses a beam end gap 10; the embedded steel plate 2 is embedded at the bottom of the seam crossing plate area 8, the embedded steel plate 2 spans the beam end gap 10, and the embedded steel plate 2 is ensured to span the beam end gap 10; the spring plate area 9 is formed by connecting each spring unit 5 in parallel, and the spring units 5 are of a flexible hinge telescopic structure with a broken line connecting rod; the water guide device 3 is arranged below the spring seam crossing plate 1 and is positioned at the position of the beam end gap 10.

Fig. 5 shows the structural form of the spring unit 5 in the present embodiment, and the flexible structure of the flexible hinge of the broken line connecting rod can realize the use function requirement of self-adaptive multidirectional flexible displacement by adjusting the number of the flexible hinges; the flexible hinge of broken line connecting rod's geometric deformation ability is strong, can effectively weaken the load transmission of each other between the beam-ends, and the integral flexible device of strideing across is in the same place both sides bridge flexonics, forms mechanical load transmission attenuation attenuator, has better antidetonation function, improves the security of bridge.

The nano carbon fiber reinforced polyurethane material is characterized in that epoxy resin and polysulfide are introduced to a polyurethane main chain to form a terpolymer by utilizing the ring-opening polymerization reaction of the epoxy resin and the addition polymerization reaction of the polysulfide, so that the polyurethane elastomer has the advantages of polyurethane, epoxy and polysulfide, and is durable as an elastomer material.

In specific implementation, the corresponding structural measures also include:

the spring seam crossing plate 1 is manufactured in sections, and the length of each section is 1-3m; the embedded steel plate 2 is a rectangular steel plate with a thickness of not less than 20 mm.

Be equipped with the screw sleeve respectively at first side beam-ends 7a and second side beam-ends 7b, anchor bolt threaded connection includes in the screw sleeve on the corresponding position: the spring plate district side anchor bolt 4a is connected in spring plate district side thread bush 11a to and stride seam board district side anchor bolt 4b and connect and stride seam board district side thread bush 11b, and each anchor bolt adopts high-strength anchor bolt, is equipped with the tip through-hole at each threaded bush's lower extreme, has inserted horizontal reinforcement 12 in the tip through-hole, and horizontal reinforcement 12 is connected with the 6 spot welding of embedded reinforcement in the expansion joint notch.

The construction method of the integral type telescopic device for the highway bridge in the embodiment comprises the following steps:

step 1, as shown in fig. 3, placing anchor bolts including a spring plate region side anchor bolt 4a and a seam crossing plate region side anchor bolt 4b in through holes of a spring seam crossing plate 1, connecting the spring plate region side anchor bolt 4a in a spring plate region side threaded sleeve 11a, connecting the seam crossing plate region side anchor bolt 4b in a seam crossing plate region side threaded sleeve 11b, and inserting a horizontal steel bar 12 into through holes at the bottom end of each threaded sleeve.

Step 2, as shown in fig. 4, the spring seam crossing plate 1 is fixedly provided with channel steel 13 by self-tapping screws, the channel steel 13 can be set to 2-3 channels, the length of the channel steel 13 is larger than the width of a notch of the expansion device, so that the channel steel 13 can be guaranteed to be erected on road surfaces on two sides of the notch when being installed, the plate body of the spring seam crossing plate is guaranteed to be straight, the assembly of the integral expansion device is completed, the assembled spring seam crossing plate 1 is sealed by using an adhesive tape, and the slurry is prevented from entering during pouring construction.

Step 3, as shown in fig. 1, accurately marking the mounting position of the expansion device at the position of the beam end notch where the expansion device needs to be mounted, cutting according to a cutting line 14 to form a notch, manufacturing a template according to the shape and the notch size of the spring seam crossing plate 1, wherein the template is firmly mounted to prevent concrete from deforming and leaking slurry during vibration, and the edge of the water stop belt is reserved with a width of 30-40 mm and fixed on the inner side of the template; before the expansion device is initially installed, the size of the expansion device is checked again, and if the installation width of the expansion device needs to be adjusted due to large temperature change, the expansion device can be pre-pressed or pre-tensioned.

And 4, step 4: two ends of the channel steel 13 are respectively erected on road surfaces at two sides of the opening of the expansion joint, so that the plate body of the spring seam crossing plate 1 keeps straight on the opening; connect the completion with 6 spot welding of embedded bar in inserting horizontal reinforcing bar 12 and the notch in the screw sleeve bottom through-hole fixed, the spot welding should be accomplished fast, prevents that the overheated telescoping device that leads to of reinforcing bar from damaging.

And 5: pouring concrete in the formwork, vibrating by using a flat vibrator before initial setting of the concrete, wherein the vibrating sequence is from inside to outside, so that redundant concrete is extruded out of the telescopic device, and the concrete is guaranteed to be dense until the telescopic device is installed to a designed elevation. After the installation is finished, whether the expansion device is higher than the road surface or not is checked, if yes, the expansion device is locally dropped by adjusting the self-tapping screws, and a heavy object is pressed on the top surface of the expansion device to prevent rebound.

Step 6: and (3) coating thread fastening glue on the anchor bolt, screwing the anchor bolt into the thread sleeve by adopting an electric wrench, and screwing the anchor bolt to a set torsion value.

And 7: as shown in fig. 6, the anchor bolt holes are filled and sealed by using elastic asphalt crack pouring glue 16, so that the elastic asphalt crack pouring glue 16 is flush with the plate surface of the spring crack crossing plate 1, and the installation of the integral type expansion device is completed.

And 8: and covering, preserving heat and preserving health aiming at the notch concrete 15, and opening traffic after the concrete strength reaches the design requirement.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An integral expansion device for a highway bridge is characterized by comprising a spring seam crossing plate (1), an embedded steel plate (2) and a water guide device (3);

the spring seam crossing plate (1) is an elastic plate body integrally formed by nano carbon fiber reinforced polyurethane materials, two ends of the elastic plate body are respectively anchored on a first side beam end (7 a) and a second side beam end (7 b) through anchor bolts, the elastic plate body is provided with a section of spring plate area (9) and a section of seam crossing plate area (8), the spring plate area (9) is positioned on the first side beam end (7 a), and the seam crossing plate area (8) crosses a beam end gap (10);

the embedded steel plate (2) is embedded at the bottom of the seam crossing plate area (8), and a beam end gap (10) is spanned by the embedded steel plate (2);

the spring plate area (9) is formed by all spring units (5) which are arranged in parallel, and the spring units (5) are of a flexible hinge telescopic structure with a broken line connecting rod;

the water guide device (3) is arranged below the spring seam crossing plate (1) and is positioned at the position of the beam end gap (10).

2. The integral telescopic device for the highway bridge according to claim 1, which is characterized in that:

the spring seam crossing plate (1) is manufactured in sections, and the length of each section is 1-3m; the embedded steel plate (2) is a rectangular steel plate with the thickness not less than 20 mm.

3. The integral telescopic device for the highway bridge according to claim 1, which is characterized in that:

first side beam-ends (7 a) and second side beam-ends (7 b) are equipped with threaded sleeve respectively, and anchor bolt threaded connection is in the threaded sleeve on the corresponding position the threaded sleeve's lower extreme is equipped with the tip through-hole horizontal reinforcing bar (12) have been inserted in the tip through-hole, horizontal reinforcing bar (12) are connected with the reinforcing bar spot welding in the expansion joint notch.

4. A construction method of the integral telescopic device for the highway bridge as claimed in claim 1, which is characterized by comprising the following steps:

step 1, placing an anchor bolt in a through hole of the spring seam crossing plate (1), connecting the anchor bolt in a threaded sleeve, and inserting a horizontal steel bar (12) into the through hole at the bottom end of each threaded sleeve;

step 2, fixing and arranging channel steel (13) on the spring seam crossing plate (1) by adopting self-tapping screws, wherein the length of the channel steel (13) is greater than the width of a notch of the telescopic device, and assembling the integral telescopic device;

step 3, accurately marking the mounting position of the telescopic device at the position of the beam end notch where the telescopic device needs to be mounted, cutting according to a cutting line (14) to form a notch, and manufacturing a template according to the shape and the notch size of the spring seam crossing plate (1);

and 4, step 4: two ends of the channel steel (13) are respectively erected on road surfaces on two sides of the opening of the expansion joint, so that the plate body of the spring seam crossing plate (1) keeps straight on the opening; connecting a horizontal steel bar 12 inserted into a through hole at the bottom end of the threaded sleeve with an embedded steel bar (6) in the notch in a spot welding manner to finish fixing;

And 6: and coating thread fastening glue on the anchor bolt, screwing the anchor bolt into the thread sleeve, and screwing the anchor bolt to a set torsion value.

And 7: the anchor bolt holes are filled and sealed by elastic asphalt crack pouring glue (16), so that the elastic asphalt crack pouring glue (16) is flush with the plate surface of the spring crack spanning plate (1), and the installation of the integral type telescopic device is completed;

and 8: the notch concrete (15) is covered, insulated and maintained, and after the strength of the concrete reaches the design requirement, the traffic can be opened.