CN220746566U - Bridge expansion structure capable of modifying modulus type into comb teeth type - Google Patents

Abstract

The utility model provides a with modular modification to flexible structure of comb-tooth type bridge, includes boundary beam dysmorphism steel (2), its characterized in that: the utility model provides a roof beam profile steel (2) upper portion excision forms roof beam transformation piece (7), the roof beam transformation piece (7) is last to be fixedly provided with a plurality of fishback mounting (8), be provided with left flexible fishback (9) on being located left fishback mounting (8), be provided with right flexible fishback (10) on being located right fishback mounting (8), left flexible fishback (9) and right flexible fishback (10) are gone up along the broach direction and are offered reserved mounting hole (11) that run through the fishback, this application is rational in infrastructure, construction convenience, the fishback telescoping device after the quick remodelling construction is not only structural strength high, and fatigue resistance is strong moreover, can be convenient carry out on-the-spot height adjustment level, supporting property and flexible function of shifting all can be guaranteed, the traffic interruption time that the construction caused has been shortened greatly.

Description

Bridge expansion structure capable of modifying modulus type into comb teeth type

Technical Field

The application relates to a bridge expansion structure, in particular to a bridge expansion structure capable of changing a modulus type into a comb-tooth type, and belongs to the technical field of road and bridge engineering.

Background

The modular bridge expansion device is an important connecting part between bridge ends, is initiated by mr. Mao Le, has a proportion of more than 80% in all bridge expansion devices in the world, and has application in China for nearly 50 years. The modular bridge expansion device is composed of anchoring steel bars, boundary beam special-shaped steel, middle beam steel, cross beams, waterproof rubber belts, displacement boxes, pressure bearing supports, compression supports, hanging frames, hinges and the like, and the basic principle is that the middle beam steel is controlled by core components such as the hinges and the like, so that the middle beam steel takes 0-80 mm as one modulus to realize multi-modulus parallel equal division displacement.

The modular bridge expansion device has a complex structure, the design requirement life of the device is only 15 years in China, the traffic flow of roads and bridges is increased day by day due to the rapid development of China economy, the modular bridge expansion device is basically in a certain overload operation state, the premature fatigue damage of the device is directly caused, and the main diseases are as follows: the displacement cannot be equally divided, the middle beam steel is broken, the hanging frame and the hinge are oxidized and corroded, the cross beam is bent downwards, and the pressure bearing support and the compression support are aged, deformed or fall off.

The modulus bridge expansion device has great potential safety hazard after fatigue damage, and must be timely repaired. All the maintenance technologies, maintenance processes, maintenance methods and maintenance structures disclosed so far are that the damaged modular bridge expansion device is entirely chiseled out to be replaced by a new bridge expansion device, and the damaged modular bridge expansion device is maintained in a bridge traffic operation environment, so that the maintenance quality and safety of the damaged modular bridge expansion device are limited by environmental conditions, the fatigue resistance of a delivery inspection finished product is reduced, and the fatigue service life after maintenance is shorter; especially in areas with larger traffic pressure, owners require peak-shifting maintenance, the on-site operation time is required to be only a few hours, traffic is required to be released, and a series of processes such as on-site chiseling of an old telescopic device, chiseling of high-strength concrete of a transition zone, cleaning of a notch, reinstalling and leveling of a new telescopic device, correction of embedded bars, epoxy bar planting, welding of anchoring pieces, reinsertion of high-strength concrete, curing, cleaning of transportation garbage and the like need scientific and reasonable construction periods and curing periods, the high-strength concrete is required to be in large quantity during maintenance and replacement of the modular expansion joints, if the early-strength and ultra-high-performance concrete is used, the cost is too high, C50 steel fiber concrete with high cost performance is generally used during maintenance, and if the C50 steel fiber concrete is used during maintenance and replacement of one-modular expansion joints, the reasonable construction period and curing period generally need to be 30 days, because the curing period of the C50 steel fiber concrete is required to be 28 days according to relevant national specifications.

Scientific and reasonable construction period and health-preserving period are mutually contradictory with traffic pressure and are mutually restricted, and cannot be balanced. In addition, if the longitudinal distance of the bridge corresponding to the special-shaped steel of the two side beams of all the modular expansion joints is limited, the special-shaped steel of the two side beams cannot be directly modified into the comb plate type expansion device within the limited distance range, a common rule is found through statistical analysis, if the special-shaped steel of the two side beams of all the modular expansion joints is directly modified into the comb plate type expansion device within the longitudinal distance range of the bridge corresponding to the special-shaped steel of the two side beams, the expansion distance gaps are different by 125 mm, and the direct modification in the range can meet structural bottlenecks.

The maintenance and replacement of the worn-out damaged modular expansion device need to be interrupted for a long time, and besides the dismantling and the installation, the chiseling, the concreting and the maintenance of concrete need a lot of time, generally about one month, so that the smooth traffic can be seriously influenced, and particularly, the road section with larger traffic flow can be seriously and negatively influenced. The prior modular expansion device is remodeled and installed into the comb plate expansion device, if the modular expansion device is installed in a notch of the modular expansion device according to the structure and the installation mode of the traditional comb plate expansion device, the installation space is insufficient, the chiseling amount of abutment concrete is large, the construction difficulty is large, the construction period is long, in addition, the modular expansion device is also poor in structural strength and unsatisfactory in fatigue resistance after being installed by the traditional mode, the leveling of the comb plate is not facilitated, more waste and garbage are generated in the construction process, and the energy conservation and environmental protection are not realized. For example, the utility model patent with the application date of 2019, 11 and 1 discloses a bridge expansion device replacement method, wherein the original integral modular bridge expansion device is replaced by a unit comb plate type bridge expansion device capable of being constructed in a segmented mode, and the bridge expansion device has the series of problems of high leveling difficulty, low structural strength after replacement construction and unsatisfactory anti-fatigue capability in the process of replacing the bridge expansion device for a long time in traffic interruption. The present utility model has been made in view of the above problems, and has not been able to solve them effectively.

Disclosure of Invention

The utility model provides a change over the comb plate telescoping device after the quick remodelling construction is not only structural strength is high, but also anti-fatigue capability is strong, can conveniently carry out on-the-spot adjustment leveling, support performance and flexible function of shifting can all be guaranteed, greatly shortened interrupt traffic construction period, effectively solved the problem that the modular type remodelling device remodelled to the comb plate telescoping device exists is a bridge flexible structure that changes the modular type into the comb plate telescoping device, the defect and the defect that are difficult to construct are difficult in the installation are unfavorable in the installation to the height adjustment leveling, construction cycle is long, the construction difficulty is big, the present provides a rational in infrastructure, construction is convenient, the quick remodelling is constructed, the comb plate telescoping device after the construction is not only structural strength is high, and the anti-fatigue capability is strong, can be convenient carry out on-the scene adjustment leveling, support performance and flexible function of shifting can all be guaranteed.

In order to achieve the above purpose, the technical solution of the present application is: the utility model provides a with flexible structure of modular modification to broach type bridge, includes boundary beam dysmorphism steel, boundary beam dysmorphism steel anchor or pre-buried fixed both sides that set up in bridge expansion joint notch, boundary beam dysmorphism steel's upper portion excision forms boundary beam transformation piece or bar mount pad, and boundary beam transformation piece or bar mount pad are last to be fixedly provided with a plurality of broach board mounting, are provided with left flexible broach board on the broach board mounting that is located the left side, are provided with right flexible broach board on the broach board mounting that is located the right side, and left flexible broach board and right flexible broach board are gone up along the broach direction and are seted up the reservation mounting hole that runs through the broach board, and the upper end and the reservation mounting hole of broach board mounting match and welded fastening.

Further, the upper C-shaped structure of the boundary beam special-shaped steel is partially or completely cut off to form a boundary beam transformation piece, the lower part of the boundary beam special-shaped steel is reserved, reinforcing ribs are fixedly arranged on abutment concrete at the outer side of the boundary beam transformation piece in an expansion bolt mode or a bar planting mode, and the reinforcing ribs are fixedly welded with the boundary beam special-shaped steel.

Further, the comb plate fixing piece is a supporting anchor plate made of steel plates, a bayonet structure is arranged at the matching position of the supporting anchor plate and the side beam reconstruction piece in a welding mode, and the supporting anchor plate is vertically fixed on the side beam reconstruction piece through the bayonet structure.

Further, the comb structures of the left telescopic comb plate and the right telescopic comb plate are in cross fit and a certain telescopic gap is reserved, the comb plate fixing piece located on the left side provides support for the left telescopic comb plate and is fixed into a whole, and the comb plate fixing piece located on the right side provides support for the right telescopic comb plate and is fixed into a whole.

Further, the reserved mounting hole is a strip-shaped reserved hole, and the width of the strip-shaped reserved hole is slightly larger than the width of the upper end of the comb plate fixing piece penetrating into the strip-shaped reserved hole.

Further, the reserved mounting hole is a T-shaped reserved hole, the T-shaped reserved hole is composed of a long-strip-shaped reserved hole and a short reserved hole perpendicular to the long-strip-shaped reserved hole, the short reserved hole is located on one side away from the tooth tip of the comb plate, and the width of the T-shaped reserved hole is slightly larger than the width of the upper end of the comb plate fixing piece penetrating into the T-shaped reserved hole.

Further, anchor parts are fixedly arranged on abutment concrete at the bottoms of the left telescopic comb plate and the right telescopic comb plate in an expansion bolt mode or a bar planting mode, the anchor parts are fixedly connected with the bottoms or the side faces of the left telescopic comb plate or the right telescopic comb plate, a plurality of fixed mounting holes are respectively formed in the upper surfaces of one sides, far away from the comb teeth, of the left telescopic comb plate and the right telescopic comb plate, the anchor parts are fixing screws, fixing screws are fixedly arranged on abutment concrete at the bottoms of the left telescopic comb plate and the right telescopic comb plate, and the upper ends of the fixing screws are fixed through bolts after penetrating through the fixed mounting holes.

Further, the bottoms of the left telescopic comb plate and the right telescopic comb plate are provided with waterproof units, one ends of the waterproof units are fixed on the side beam reconstruction piece positioned on one side, and the other ends of the waterproof units are fixed on the side beam reconstruction piece positioned on the other side.

Further, the bottoms of the left telescopic comb plate and the right telescopic comb plate are provided with a left stainless steel plate and a right stainless steel plate which are vertically overlapped in a sliding way and are positioned right above the waterproof unit, one stainless steel plate is horizontally fixed at one side of the expansion joint notch, the other stainless steel plate is horizontally fixed on the other side of the expansion joint notch, and a dustproof elastic unit is arranged between the two stainless steel plates and the bottoms of the left telescopic comb plate and the right telescopic comb plate.

The beneficial effects of this application are:

1. this application make full use of the original boundary beam dysmorphism steel of modulus telescoping device that changes to cut the transformation has been carried out on the upper portion of boundary beam dysmorphism steel, has formed the boundary beam transformation piece that is applicable to fishback telescoping device installation fixed, has utilized original anchor basis to the maximum extent, only needs simultaneously to carry out the chisel of very little scope to the transition zone concrete and has reduced the construction volume.

2. This application is provided with a plurality of broach board mounting on the boundary beam transformation piece vertical fixation, forms the support fixed knot of supporting upper portion broach board, and the broach board mounting passes through bayonet structure vertical welding to be fixed on the boundary beam transformation piece, and structural strength is high, supports fixedly reliably to the broach board.

3. The reservation mounting hole that runs through the broach board has been seted up on flexible broach board in left side and flexible broach board in right side to this application, is convenient for penetrate and welded fastening on the broach board with broach board mounting upper end, not only is convenient for increase and leveling the upper surface of broach board in the broach board thickness range, and joint strength between broach board and the broach board mounting is high moreover, has guaranteed sufficient supporting strength.

4. The comb plate expansion device has the advantages that the technical problem that the modular expansion device is modified into the comb plate expansion device is effectively solved, the structure is reasonable, the construction is convenient, the comb plate expansion device after quick modification construction is high in structural strength, the fatigue resistance is high, the on-site heightening and leveling can be conveniently carried out, the supporting performance and the expansion and displacement function can be guaranteed, the traffic interruption construction period is greatly shortened, and the application prospect is wide.

Drawings

Fig. 1 is a schematic structural view of a prior art modular expansion device.

Fig. 2 is a schematic structural view of a cross section of a prior art modular expansion device.

Fig. 3 is a top view of a first embodiment of the present application.

FIG. 4 is a schematic cross-sectional view of A-A in FIG. 3.

Fig. 5 is a top view of a second embodiment of the present application.

FIG. 6 is a schematic cross-sectional view of A-A in FIG. 5.

Fig. 7 is a top view of a third embodiment of the present application.

FIG. 8 is a schematic cross-sectional view of A-A of FIG. 7.

Fig. 9 is a top view of a fourth embodiment of the present application.

FIG. 10 is a schematic cross-sectional view of A-A in FIG. 9.

In the figure: the side beam comprises middle beam steel 1, side beam special-shaped steel 2, a cross beam 3, a displacement box body 4, an anchoring steel bar 5, a hinge 6, a side beam reconstruction piece 7, a comb plate fixing piece 8, a left telescopic comb plate 9, a right telescopic comb plate 10, a reserved mounting hole 11, a reinforcing rib 12, a waterproof unit 13, a dustproof elastic unit 14, a fixed mounting hole 15, an anchoring piece 16 and high-strength concrete 17.

Detailed Description

The present application is described in further detail below with reference to the attached drawing figures and detailed description.

Referring to fig. 1 to 10, a bridge expansion structure for modifying a modulus type into a comb-tooth type comprises edge beam special-shaped steel 2, wherein the edge beam special-shaped steel 2 is anchored or pre-buried and fixedly arranged on two sides of a notch of a bridge expansion joint, and the bridge expansion joint is characterized in that: the upper portion excision of boundary beam dysmorphism steel 2 forms boundary beam transformation piece 7 or bar mount pad, and the boundary beam transformation piece 7 or bar mount pad are last to be fixedly provided with a plurality of broach board mounting 8, are provided with left flexible broach board 9 on the broach board mounting 8 that is located left, are provided with right flexible broach board 10 on the broach board mounting 8 that is located right, have seted up the reservation mounting hole 11 that runs through the broach board along the broach direction on left flexible broach board 9 and the right flexible broach board 10, and the upper end and the reservation mounting hole 11 of broach board mounting 8 match and welded fastening.

The upper C-shaped structure of the boundary beam special-shaped steel 2 is partially or completely cut off to form a boundary beam transformation piece 7, the lower part of the boundary beam special-shaped steel 2 is reserved, reinforcing ribs 12 are fixedly arranged on abutment concrete outside the boundary beam transformation piece 7 in an expansion bolt mode or a bar planting mode, and the reinforcing ribs 12 are fixedly welded with the boundary beam special-shaped steel 2.

The comb plate fixing piece 8 is a supporting anchor plate made of steel plates, a bayonet structure is formed in the matching position of the supporting anchor plate and the side beam transformation piece 7 in a set or welding mode, and the supporting anchor plate is vertically fixed on the side beam transformation piece 7 through the bayonet structure.

The comb structures of the left telescopic comb plate 9 and the right telescopic comb plate 10 are in cross fit and a certain telescopic gap is reserved, the comb plate fixing piece 8 positioned on the left side provides support for the left telescopic comb plate 9 and is fixed into a whole, and the comb plate fixing piece 8 positioned on the right side provides support for the right telescopic comb plate 10 and is fixed into a whole.

The reserved mounting holes 11 are strip-shaped reserved holes, and the width of each strip-shaped reserved hole is slightly larger than the width of the part of the upper end of the comb plate fixing piece 8 penetrating into the strip-shaped reserved hole.

The reserved mounting hole 11 is a T-shaped reserved hole, the T-shaped reserved hole is composed of a long-strip-shaped reserved hole and a short reserved hole perpendicular to the long-strip-shaped reserved hole, the short reserved hole is located on one side away from the tooth tip of the comb plate, and the width of the T-shaped reserved hole is slightly larger than the width of the upper end of the comb plate fixing piece 8 penetrating into the T-shaped reserved hole.

The bridge abutment concrete at the bottoms of the left telescopic comb plate 9 and the right telescopic comb plate 10 is fixedly provided with an anchoring piece 16 in an expansion bolt mode or a bar planting mode, the anchoring piece 16 is fixedly connected with the bottoms or the side faces of the left telescopic comb plate 9 or the right telescopic comb plate 10, a plurality of fixed mounting holes 15 are respectively formed in the upper surfaces of one sides, far away from the comb teeth, of the left telescopic comb plate 9 and the right telescopic comb plate 10, the anchoring piece 16 is a fixing screw, the bottom bridge abutment concrete of the left telescopic comb plate 9 and the right telescopic comb plate 10 is fixedly provided with a fixing screw, and the upper ends of the fixing screws penetrate through the fixed mounting holes 15 and are fixed through bolts.

The bottoms of the left telescopic comb plate 9 and the right telescopic comb plate 10 are provided with a waterproof unit 13, one end of the waterproof unit 13 is fixed on the side beam reconstruction piece 7 positioned on one side, and the other end of the waterproof unit 13 is fixed on the side beam reconstruction piece 7 positioned on the other side.

The waterproof device is characterized in that the bottoms of the left telescopic comb plate and the right telescopic comb plate are provided with left stainless steel plates and right stainless steel plates which are vertically overlapped in a sliding manner and are arranged right above the waterproof unit, one stainless steel plate is horizontally fixed on one side of the expansion joint notch, the other stainless steel plate is horizontally fixed on the other side of the expansion joint notch, and a dustproof elastic unit 14 is arranged between the two stainless steel plates and the bottoms of the left telescopic comb plate and the right telescopic comb plate.

Referring to fig. 3 to 10, aiming at the construction cycle constraint of the maintenance and replacement of the traditional modular bridge expansion device and the structural bottleneck of the modified comb plate type, through a great amount of field investigation and research, the standard size rule of the boundary beam special-shaped steel of all the modular bridge expansion devices is found, the longitudinal width of the C-shaped groove structure of the upper part of the single boundary beam special-shaped steel is 40 mm along the bridge, the total length of the two boundary beam special-shaped steels is 80 mm, the C-shaped structure of the upper part of the boundary beam special-shaped steel is cut off on site, the concrete of the transition zone of not less than 45 mm on the outer sides of the two boundary beam special-shaped steels is chiseled, and the installation distance of not less than 170 mm and the limit of far more than 125 mm are released. In addition, the damaged modular bridge expansion device is found that most areas of the transition zone high-strength concrete and the displacement box body are intact, the traditional maintenance method needs to spend most time to chisel the old expansion device, chisel the transition zone high-strength concrete and the displacement box body, clean the notch, implant the epoxy, pour the high-strength concrete again, preserve the health, clean and transport the rubbish, and the like, and a large amount of manpower and material resources are consumed, and the traditional maintenance method is not environment-friendly.

A modular expansion device is modified into a comb-tooth type structure and a replacement method thereof, and the modular expansion device is quickly modified into a comb-tooth type expansion device by only removing middle beam steel and partially cutting off side beam special-shaped steel on the premise of reserving intact areas such as side beam special-shaped steel, transition zone high-strength concrete and displacement box body to the greatest extent, chiseling off concrete of transition zones at the outer sides of the two side beam special-shaped steel of not less than 45 mm, and in a space range corresponding to the transition zones at the outer sides of the two side beam special-shaped steel of not less than 45 mm.

According to the method, the damaged modular expansion device is used for on-site rapid modification maintenance, the original modular expansion device is removed and replaced, the comb plate expansion device applied for the method is replaced, the service performance and durability of the expansion device are improved, meanwhile, the expansion device can be rapidly maintained and replaced, and traffic is prevented from being interrupted for a long time. Therefore, the application solves a series of technical problems which cannot be solved in the past, and the specific structure and principle are as follows:

the existing modular expansion device mainly comprises the following main components: the beam comprises a middle beam steel 1, side beam special-shaped steel 2, a cross beam 3, a displacement box body 4, anchoring steel bars 5 and hinges 6, wherein the displacement box bodies 4 are fixedly arranged at the left side and the right side of two adjacent bridge abutment beam ends respectively, the cross beam 3 is fixedly arranged between the two opposite displacement box bodies 4, the cross beams 3 are positioned on the same horizontal plane and are parallel to each other, a plurality of middle beam steels 1 are vertically and movably arranged on the cross beam 3, and the middle beam steels 1 and the side beam special-shaped steel 2 are arranged in parallel. The bridge abutment beam end is fixedly provided with an edge beam special-shaped steel 2, an anchoring steel bar 5 is pre-buried in the bridge abutment beam end, and the edge beam special-shaped steel 2 is fixedly welded with the anchoring steel bar 5. A hinge 6 is arranged between the two opposite displacement boxes 4, the hinge 6 is connected with each middle beam steel 1, and equidistant sliding expansion and contraction of each middle beam steel 1 on the cross beam 3 are ensured through the hinge 6.

When the existing modular expansion device needs to be replaced due to fatigue damage and the like caused by long-term use, only the middle beam steel 1 is required to be removed, the side beam special-shaped steel 2 is cut and reformed, the upper portion of the side beam special-shaped steel 2 is cut to form a side beam reformed part 7, specifically, the upper C-shaped structure of the side beam special-shaped steel 2 is cut or completely cut to form the side beam reformed part 7, and the lower portion of the side beam special-shaped steel 2 is reserved, so that the original available structure can be utilized to the greatest extent, the maintenance time is shortened, and the maintenance efficiency is improved. Meanwhile, only the concrete of the transition zone, which is not less than 45 mm wide and is close to one side of the pavement, of the boundary beam special-shaped steel 2 is required to be chiseled on site, and sufficient installation and construction space is provided for installing the comb plate expansion device. In addition, the boundary beam special-shaped steel 2 can be completely dismantled, a new strip-shaped mounting seat is mounted, the strip-shaped mounting seat is anchored on the end face of the bridge abutment, and the action and the function of the strip-shaped mounting seat are the same as those of the boundary beam reconstruction piece 7.

A plurality of comb plate fixing pieces 8 are fixedly arranged on the side beam reforming pieces 7 or the strip-shaped mounting seats which are respectively fixed on the two adjacent bridge abutment beam ends, and the comb plate fixing pieces 8 are formed by machining or casting. The comb plate fixing piece 8 can adopt a supporting anchor plate made of steel plates, a bayonet structure is arranged at the matching part of the supporting anchor plate and the side beam reforming piece 7 in a welding mode, the supporting anchor plate is vertically fixed on the side beam reforming piece 7 through the bayonet structure, the bottom and the side face of the bayonet structure of the supporting anchor plate are welded and fixed on the side beam reforming piece 7, and the supporting anchor plate and the side beam reforming piece 7 are fixed into a whole. The edge beam reforming piece 7 can also adopt supporting brackets, and the supporting brackets are welded and fixed on the edge beam reforming piece 7 to form a supporting and fixing structure for supporting the upper comb plate.

The comb structure of the left telescopic comb plate 9 and the comb structure of the right telescopic comb plate 10 are in crossed fit and a certain telescopic gap is reserved, and enough movement space is reserved for telescopic deflection. The left telescopic comb plate 9 and the right telescopic comb plate 10 are provided with reserved mounting holes 11 penetrating through the comb plate along the comb direction, the reserved mounting holes 11 have various structural forms, and the left telescopic comb plate and the right telescopic comb plate mainly have two structural forms of strip-shaped reserved holes and T-shaped reserved holes.

When the long-strip-shaped preformed hole is adopted, as in the first embodiment and the second embodiment, the width of the long-strip-shaped preformed hole is slightly larger than the width of the part of the upper end of the comb plate fixing piece 8 penetrating into the long-strip-shaped preformed hole, so that the upper end of the comb plate fixing piece 8 penetrates into the long-strip-shaped preformed hole. The upper end of the comb plate fixing piece 8 penetrates into the reserved mounting hole 11 and is installed in a matched mode, the upper surface of the comb plate is adjusted to be high and leveled in the thickness range of the comb plate, the upper end of the comb plate fixing piece 8 and the comb plate are welded and fixed, the comb plate fixing piece 8 located on the left side provides support for the left telescopic comb plate 9 and is fixed into a whole, and the comb plate fixing piece 8 located on the right side provides support for the right telescopic comb plate 10 and is fixed into a whole.

When the T-shaped preformed hole is adopted, as in the third embodiment and the fourth embodiment, the T-shaped preformed hole is formed by a long-strip-shaped preformed hole and a short preformed hole perpendicular to the long-strip-shaped preformed hole, the short preformed hole is positioned at one side far away from the tooth tip of the comb plate, the width of the reserved mounting hole 11 is slightly larger than the width of the part, penetrating into the reserved mounting hole 11, of the upper end of the comb plate fixing piece 8, and the upper end of the comb plate fixing piece 8 conveniently penetrates into the reserved mounting hole 11. The upper end of the comb plate fixing piece 8 penetrates into the T-shaped preformed hole 11 and is installed in a matched mode, the upper surface of the comb plate is heightened and leveled in the thickness range of the comb plate, the upper end of the comb plate fixing piece 8 and the comb plate are welded and fixed, the comb plate fixing piece 8 located on the left side provides support for the left telescopic comb plate 9 and is fixed into a whole, and the comb plate fixing piece 8 located on the right side provides support for the right telescopic comb plate 10 and is fixed into a whole.

In order to improve the anchoring effect of fishback, this application is fixed through expansion bolts mode or planting the fixed first strengthening rib 12 that is provided with of muscle mode on bridge abutment concrete in the boundary beam transformation piece 7 outside, and first strengthening rib 12 and boundary beam dysmorphism steel 2 welded fastening, first strengthening rib 12 adopt the reinforcing bar to make after crooked 90 degrees, can also adopt a door font reinforced bar structure, and planting the muscle degree of depth needs to satisfy epoxy planting muscle tensile strength design requirement. In addition, anchor 16 is fixedly arranged on abutment concrete outside the left telescopic comb plate 9 and the right telescopic comb plate 10 in an expansion bolt mode or a bar planting mode, and the outer ends of the comb plates are connected and fixed through the anchor 16, so that the anchoring strength of the comb plates is further improved. The anchor 16 adopts fixing screw, and a plurality of fixed mounting holes 15 have been seted up respectively to the side upper surface that left flexible broach board 9 and right flexible broach board 10 kept away from the broach, and fixing screw's bottom vertical fixation sets up in the bottom abutment concrete of left flexible broach board 9 and right flexible broach board 10, and fixing screw's upper end passes through fixed mounting hole 15 after fixed mounting hole through the bolt fastening, realizes the reinforcement anchor to the broach board.

In addition, the waterproof unit 13 is arranged at the bottoms of the left telescopic comb plate 9 and the right telescopic comb plate 10, the waterproof unit 13 adopts an elastic water stop belt structure, and the cross section of the middle part of the waterproof unit 13 is similar to a sugarcoated haws-like structure. One end of the waterproof unit 13 is fixed to the side beam reconstruction piece 7 located on one side, the other end of the waterproof unit 13 is fixed to the side beam reconstruction piece 7 located on the other side, two ends of the waterproof unit 13 can be further fixed to the lower end of the outer side of the side beam reconstruction piece 7 through C-shaped channel steel, the bottoms of the left telescopic comb plate and the right telescopic comb plate are further provided with left stainless steel plates and right stainless steel plates which are vertically overlapped in a sliding mode and are located right above the waterproof unit, one stainless steel plate is horizontally fixed to one side of an expansion joint notch, the other stainless steel plate is horizontally fixed to the other side of the expansion joint notch, and a dustproof elastic unit 14 is arranged between the two stainless steel plates and the bottoms of the left telescopic comb plate and the right telescopic comb plate. The left and right telescopic comb plates 9 and 10 are staggered with each other, an elastic material with a liquid initial state is poured between the comb plates and the waterproof unit 13, the dustproof elastic unit 14 is formed after solidification, the dustproof elastic unit 14 is made of a high polymer elastic material, the dustproof elastic unit 14 has certain elasticity, bonding strength, supporting strength, telescopic deflection performance and weather resistance, the waterproof unit 13 can also be made of two mutually overlapped and telescopic stainless steel plate structures, one end of each stainless steel plate is fixed with the side beam reconstruction piece 7 positioned on the same side, and the two mutually overlapped and telescopic stainless steel plate structures form effective support for the dustproof elastic unit 14.

The construction method for the remodelling replacement of the modular expansion device comprises the following steps: firstly, dismantling the middle beam steel 1 of the modular expansion device, reserving the boundary beam special-shaped steel 2 positioned on two sides of the expansion joint notch, and chiseling out transition zone concrete with the width of not less than 45 mm outside the boundary beam special-shaped steel 2 on site. And then cutting and reforming the boundary beam special-shaped steel 2, and cutting the upper part of the boundary beam special-shaped steel 2 to form a boundary beam reforming piece 7 which is convenient for installing and fixing the comb plate fixing piece 8. Then fixedly provided with a plurality of fishback fixing pieces 8 on the boundary beam transformation piece 7, the bayonet structure welding of fishback fixing piece 8 bottom is fixed on boundary beam transformation piece 7, and the side of backplate 17 is fixed with the outer terminal surface of supporting anchor plate vertically, and the bottom welding of backplate 17 sets up on boundary beam transformation piece 7 or bar mount pad. Then, the left telescopic comb plate 9 and the right telescopic comb plate 10 are installed and fixed on the comb plate fixing piece 8, the upper end of the comb plate fixing piece 8 penetrates into reserved installation holes 11 on the left telescopic comb plate 9 and the right telescopic comb plate 10, comb structures of the left telescopic comb plate 9 and the right telescopic comb plate 10 are matched in a crossing mode, a certain telescopic gap is reserved, the upper surface of the comb plate is heightened and leveled in the thickness range of the comb plate, and the upper end of the comb plate fixing piece 8 and the comb plate are welded and fixed. And finally, pouring high-strength concrete 17 in the notch of the transition zone area outside the left telescopic comb plate 9 and the right telescopic comb plate 10, and opening traffic after cleaning site garbage.

The foregoing is a further detailed description of the present application in connection with the detailed description, and it is not intended to limit the practice of the present application to the details, but is to be construed as falling within the scope of the present application, since numerous modifications and substitutions can be made by one of ordinary skill in the art without departing from the spirit of the present application.

Claims (8)

1. The utility model provides a with flexible structure of modular modification to comb tooth type bridge, includes boundary beam dysmorphism steel (2), boundary beam dysmorphism steel (2) anchor or pre-buried fixed setting in the both sides of bridge expansion joint notch, its characterized in that: the upper portion excision of boundary beam dysmorphism steel (2) forms boundary beam transformation piece (7) or bar mount pad, and the boundary beam transformation piece (7) or bar mount pad are gone up to be fixed and are provided with a plurality of broach board mounting (8), are provided with left flexible broach board (9) on being located left broach board mounting (8), are provided with right flexible broach board (10) on being located right broach board mounting (8), and reserved mounting hole (11) that run through the broach board are offered along the broach direction on left flexible broach board (9) and right flexible broach board (10), and the upper end and the reserved mounting hole (11) of broach board mounting (8) cooperate and welded fastening.

2. A bridge telescoping construction as recited in claim 1, wherein said modular retrofitting comprises: the upper C-shaped structure of the boundary beam special-shaped steel (2) is partially or completely cut off to form a boundary beam transformation piece (7), the lower part of the boundary beam special-shaped steel (2) is reserved, reinforcing ribs (12) are fixedly arranged on abutment concrete at the outer side of the boundary beam transformation piece (7) in an expansion bolt mode or a bar planting mode, and the reinforcing ribs (12) are fixedly welded with the boundary beam special-shaped steel (2).

3. A bridge telescoping construction as recited in claim 1, wherein said modular retrofitting comprises: the comb plate fixing piece (8) is a supporting anchor plate made of steel plates, a bayonet structure is arranged at the matching position of the supporting anchor plate and the side beam reconstruction piece (7) in a sleeved or welded mode, and the supporting anchor plate is vertically fixed on the side beam reconstruction piece (7) through the bayonet structure.

4. A bridge telescoping construction as recited in claim 1, wherein said modular retrofitting comprises: the comb structure of left flexible fishback (9) and right flexible fishback (10) alternately cooperates and leaves certain flexible clearance, and comb mounting (8) that are located left side provide support and fix as an organic wholely for left flexible fishback (9), and comb mounting (8) that are located right side provide support and fix as an organic wholely for right flexible fishback (10).

5. A bridge telescoping construction as recited in claim 1, wherein said modular retrofitting comprises: the reserved mounting holes (11) are strip-shaped reserved holes, and the width of each strip-shaped reserved hole is slightly larger than the width of the upper end of the comb plate fixing piece (8) penetrating into the part of each strip-shaped reserved hole.

6. A bridge telescoping construction as recited in claim 1, wherein said modular retrofitting comprises: the reserved mounting hole (11) is composed of a strip-shaped reserved hole and a short reserved hole perpendicular to the strip-shaped reserved hole, the short reserved hole is located on one side away from the tooth tip of the comb plate, and the width of the reserved mounting hole (11) is slightly larger than the width of the part, penetrating into the reserved mounting hole (11), of the upper end of the comb plate fixing piece (8).

7. A bridge telescoping construction as recited in claim 1, wherein said modular retrofitting comprises: the novel bridge abutment concrete structure is characterized in that anchoring pieces (16) are fixedly arranged on bridge abutment concrete at the bottoms of the left telescopic comb plate (9) and the right telescopic comb plate (10) in an expansion bolt mode or a bar planting mode, the anchoring pieces (16) are fixedly connected with the bottoms or the side faces of the left telescopic comb plate (9) or the right telescopic comb plate (10), a plurality of fixing mounting holes (15) are respectively formed in the upper surfaces of one sides, far away from the comb teeth, of the left telescopic comb plate (9) and the right telescopic comb plate (10), the anchoring pieces (16) adopt fixing screws, fixing screws are fixedly arranged on the bridge abutment concrete at the bottoms of the left telescopic comb plate (9) and the right telescopic comb plate (10), and the upper ends of the fixing screws penetrate through the fixing mounting holes (15) and are fixed through bolts.

8. A bridge telescoping construction as recited in claim 1, wherein said modular retrofitting comprises: the bottoms of the left telescopic comb plate (9) and the right telescopic comb plate (10) are provided with waterproof units (13), one ends of the waterproof units (13) are fixed on the side beam reconstruction piece (7) positioned on one side, and the other ends of the waterproof units (13) are fixed on the side beam reconstruction piece (7) positioned on the other side; the waterproof unit (13) can also be formed by two stainless steel plate structures which are mutually overlapped and telescopic, one end of each stainless steel plate is fixed with the side beam reconstruction piece (7) positioned on the same side, and the two stainless steel plate structures which are mutually overlapped and telescopic form effective support for the dustproof elastic unit (14).