CN224133550U - Structure suitable for longitudinal expansion joint of spliced wide bridge - Google Patents

Abstract

This utility model provides a structure suitable for longitudinal expansion joints in widened bridges, including an existing bridge section, a widened bridge section, a steel reinforcement component, a sealing structure, and an asphalt layer and a concrete layer arranged sequentially from top to bottom. Expansion joints are formed at intervals between the cantilever ends of the existing bridge section and the widened bridge section. Each cantilever end of both sections has recessed stepped grooves arranged opposite each other along the transverse direction. Each stepped groove includes an upper groove and a lower groove, and a steel reinforcement component is connected to each groove. By repaving the connecting pavement layer between the existing bridge section and the widened bridge section using stepped grooves, bridge deck stress can be released. Combined with the steel reinforcement component, crack formation can be reduced. The entire structure is simple, easy to construct, and the sealing structure prevents rainwater leakage, providing good waterproofing. The overall structure is low-cost and has broad application prospects.

Description

Structure suitable for longitudinal expansion joint of spliced wide bridge

Technical Field

The utility model relates to the technical field of spliced wide bridges, in particular to a structure suitable for a longitudinal expansion joint of a spliced wide bridge.

Background

Along with the rapid development of social economy, the traffic volume is increased year by year, and in order to improve the service passing level of the bridge, the bridge needs to be reconstructed and expanded. If the technical condition of the original bridge is good, the single-side or double-side splicing width of the original bridge is adopted to increase the traffic capacity of the original bridge in order to save land resources and reduce total investment.

Because the existing bridge and the spliced wide bridge have different construction periods, the existing bridge and the spliced wide bridge have the differences in the aspects of structure shrinkage deformation, foundation settlement, deflection deformation and the like. In order to reduce the influence of the spliced wide bridge on the existing bridge, the existing bridge is generally not connected with the upper part and the lower part of the spliced wide bridge, only a longitudinal seam is reserved between the existing bridge and the spliced wide bridge, and the existing bridge is directly separated or is provided with a telescopic device for treatment. If the two main beams are directly separated, the stress is clear, the two main beams are not influenced, the travelling comfort is influenced, the jumping of the vehicle exists, the cantilever ends of the main beams are easy to damage and repair difficultly under the impact action of the vehicle, and the rain sewage on the bridge floor flows into the lower part of the bridge to influence the vehicle passing or navigation under the bridge. If the telescopic device is arranged, the telescopic requirement is met, but the structure is complex, the construction is complicated, the replacement is difficult, and the cost is high.

In view of the foregoing, there is a need for a construction suitable for widening the longitudinal expansion joint of a bridge that addresses or at least alleviates the above-mentioned drawbacks.

Disclosure of utility model

The utility model mainly aims to provide a structure suitable for a longitudinal expansion joint of a spliced wide bridge, so as to solve the problems of easy vehicle jump and water leakage caused by the separation of a telescopic structure in the prior art.

In order to achieve the aim, the utility model provides a structure suitable for a longitudinal expansion joint of a spliced wide bridge, which comprises an existing bridge section, a spliced wide bridge section, a reinforcing steel bar reinforcing component, a sealing structure, and an asphalt layer and a concrete layer which are sequentially arranged from top to bottom,

The cantilever ends of the existing bridge section and the cantilever ends of the spliced wide bridge section are arranged at intervals to form expansion joints, the cantilever ends of the existing bridge section and the cantilever ends of the spliced wide bridge section are respectively concavely formed with step-type notches which are oppositely arranged along the transverse bridge direction, wherein,

Each stepped notch comprises an upper notch and a lower notch, the concrete layer is connected in the two lower notches, the sealing structure is connected between the two concrete layers, and the asphalt layer is connected in the two upper notches;

Each step-type notch is internally connected with a reinforcing steel bar reinforcing component, and the reinforcing steel bar reinforcing components in the two step-type notches are oppositely arranged along the transverse bridge.

Preferably, the reinforcing steel bar reinforcing component comprises a plurality of longitudinal reinforcing steel bars, every two longitudinal reinforcing steel bars which are arranged at intervals along the transverse bridge are longitudinal reinforcing steel bar groups, a group of longitudinal reinforcing steel bar groups are arranged in the concrete layer, and two groups of longitudinal reinforcing steel bar groups which are arranged at intervals along the vertical direction are arranged in the asphalt layer.

Preferably, the reinforcing steel bar reinforcing component further comprises a plurality of portal steel bars distributed along the longitudinal bridge at intervals, the top ends of the portal steel bars are arranged in the asphalt layer, the bottom ends of the portal steel bars extend downwards into the concrete layer, and the longitudinal steel bars are welded to the inner sides of the portal steel bars.

Preferably, the steel reinforcement assembly further comprises a hot rolled angle steel, wherein the hot rolled angle steel is arranged in the asphalt layer and welded at one end, close to the expansion joint, of the outer side of the top end of the inverted V-shaped steel bar.

Preferably, the sealing structure adopts a sponge sealing strip.

Preferably, the asphalt layer is filled between the two upper notches.

Preferably, the width of the lower notch is 15 cm-17 cm, and the width of the upper notch is 25 cm-27 cm.

Preferably, the longitudinal spacing distance between every two adjacent portal reinforcing bars is 15 cm-17 cm.

Preferably, the existing bridge section and the spliced wide bridge section comprise a bridge deck pavement layer and a bridge deck cast-in-situ layer which are arranged from top to bottom, and a waterproof layer is coated between the bridge deck pavement layer and the bridge deck cast-in-situ layer.

Preferably, the width of the expansion joint is 1 cm-2 cm.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model provides a structure suitable for a longitudinal expansion joint of a spliced wide bridge, which comprises an existing bridge section, a spliced wide bridge section, reinforcing steel bar reinforcing components, a sealing structure, and an asphalt layer and a concrete layer which are sequentially arranged from top to bottom, wherein expansion joints are formed by interval arrangement between cantilever ends of the existing bridge section and cantilever ends of the spliced wide bridge section, stepped notches which are oppositely arranged along a transverse bridge direction are respectively formed in a sunken mode on the cantilever ends of the existing bridge section and the cantilever ends of the spliced wide bridge section, each stepped notch comprises an upper notch and a lower notch, the concrete layer is connected in the two lower notches, the sealing structure is connected between the two concrete layers, the asphalt layer is connected in the two upper notches, the reinforcing steel bar reinforcing components are connected in each stepped notch, and the reinforcing steel bar reinforcing components in the two stepped notches are oppositely arranged along the transverse bridge direction. So through setting up the form of step notch and mating up the road surface layer between the existing bridge section and the wide bridge section of mating formation again, can release bridge deck stress, cooperation reinforcing bar reinforcing assembly reducible crack produces, whole simple structure, construction convenience, and be provided with seal structure and still can prevent the rainwater seepage, waterproof effect is good, and whole construction cost is low, has extensive application prospect.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of an overall structure in one embodiment of the utility model.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Reference numerals illustrate:

110. Existing bridge section, 111, expansion joint, 120, bridge section with splicing width, 121, bridge deck pavement layer, 122, bridge deck cast-in-situ layer, 123, waterproof layer, 130, reinforcing steel bar reinforcing component, 131, longitudinal reinforcing steel bar, 132, portal reinforcing steel bar, 133, hot rolled angle steel, 140, sealing structure, 150, asphalt layer, 160, concrete layer, 170, step notch, 171, upper notch, 172, lower notch.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present utility model) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1, a structure suitable for a longitudinal expansion joint 111 of a bridge with a width in accordance with an embodiment of the present utility model includes an existing bridge segment 110, a bridge segment 120 with a width, a reinforcing steel bar reinforcing component 130, a sealing structure 140, and an asphalt layer 150 and a concrete layer 160 sequentially arranged from top to bottom. Firstly, it should be noted that the transverse direction refers to the widening direction of the bridge, the longitudinal direction refers to the extending direction of the bridge, and the expansion joint 111 is different from the prior art in that if the structures are directly separated, the stress is clear, the two structures do not affect each other, but the travelling comfort is affected, the jumping is caused, the cantilever end of the main beam is easy to be damaged under the impact action of the vehicle, the repairing is difficult, the rain sewage on the bridge deck flows into the bridge to affect the passing or navigation under the bridge, and if the expansion device is arranged, the expansion device meets the expansion requirement, but the structure is complex, the construction is complicated, the replacement is difficult, and the cost is high. The present utility model solves the above-mentioned drawbacks of the prior art by providing a construction suitable for a longitudinal expansion joint 111 of a bridge of widening, in particular as follows:

The cantilever ends of the existing bridge section 110 and the cantilever ends of the spliced wide bridge section 120 are arranged at intervals to form expansion joints 111, the cantilever ends of the existing bridge section 110 and the cantilever ends of the spliced wide bridge section 120 are respectively concavely formed with stepped notches 170 oppositely arranged along the transverse bridge direction, each stepped notch 170 comprises an upper notch 171 and a lower notch 172, the concrete layer 160 is connected with the two lower notches 172, the sealing structure 140 is connected between the two concrete layers 160, the asphalt layer 150 is connected with the two upper notches 171, the reinforcing steel bar reinforcing components 130 are connected with the two stepped notches 170, and the reinforcing steel bar reinforcing components 130 in the two stepped notches 170 are oppositely arranged along the transverse bridge direction.

Specifically, the structure of the longitudinal expansion joint 111 suitable for the spliced wide bridge in the application comprises an existing bridge section 110, a spliced wide bridge section 120, a reinforcing steel bar reinforcing component 130, a sealing structure 140, and an asphalt layer 150 and a concrete layer 160 which are sequentially arranged from top to bottom, wherein the cantilever end of the spliced wide bridge section 120 and the cantilever end of the existing bridge section 110 are arranged at intervals so as to reserve a longitudinal expansion joint 111, the expansion joint 111 can be generally arranged to be 1 cm-2 cm wide, preferably, the expansion joint 111 is arranged to be 2cm wide in the application, and in order to change the structural strength of the cantilever end of the spliced wide bridge section 120 and the cantilever end of the existing bridge section 110, the damage is reduced so as to ensure the comfort, and the step-shaped notch 170 needs to be recessed to form a new structural pavement layer for paving again.

The stepped notch 170 of the existing bridge segment 110 and the stepped notch 170 of the spliced wide bridge segment 120 are oppositely arranged along the transverse bridge direction so as to ensure that the structural stress on two sides is uniform and the change is gentle, the stepped notch 170 can be formed in a chiseling way for the existing bridge segment 110, and can be formed in a reserved way for the spliced wide bridge segment 120, each stepped notch 170 comprises an upper notch 171 and a lower notch 172, the lower notch 172 is used for paving the concrete layer 160, the concrete layer 160 plays a role of bearing and transferring load so as to provide a solid foundation for the crane, preferably, the crane can be filled with high-strength small-macadam concrete, and compared with the original bridge floor layer 122, the crane has higher strength and is more suitable for the structural strength at the expansion joint 111; the upper notch 171 is used for paving the asphalt layer 150, the asphalt layer 150 can form a smooth and continuous pavement surface through good flexibility and plasticity, driving jolts are reduced, driving comfort is improved, in a preferred embodiment, elastomer modified asphalt can be adopted, so that the asphalt layer has better flexibility to release bridge deck stress, the sealing structure 140 is blocked between the concrete layers 160 of the two lower notches 172, thereby playing a role of preventing rainwater leakage, so as to prevent the rainwater and sewage of the bridge deck from flowing under the bridge to influence the traffic or navigation under the bridge, preferably, the sealing structure 140 can adopt flexible sponge sealing strips, which can better adapt to deformation besides playing a role of preventing water leakage, further, the reinforcing steel bar reinforcing component 130 is used for reinforcing the structural strength of the asphalt layer 150 and the concrete layer 160, so as to reduce the generation of cracks, avoiding long-term maintenance.

As a preferred embodiment of the present utility model, the reinforcing steel bar reinforcing component 130 includes a plurality of longitudinal reinforcing steel bars 131, each two longitudinal reinforcing steel bars 131 are arranged at intervals along the transverse bridge direction, one longitudinal reinforcing steel bar 131 is arranged in the concrete layer 160, and two longitudinal reinforcing steel bars 131 are arranged in the asphalt layer 150 at intervals along the vertical direction.

It should be noted that, the longitudinal steel bars 131 can effectively restrict the longitudinal shrinkage in the pavement layer, reduce the generation and expansion of cracks, reduce the uneven settlement of the pavement layer, and reduce the pavement damage caused by settlement, and considering the acting load generated by the asphalt layer 150 directly contacting the pedestrians, two groups of longitudinal steel bars 131 with more numbers are arranged in the asphalt layer 150 to increase the bearing capacity of the structure and reduce the cracks.

As a preferred embodiment of the present utility model, the reinforcing steel bar reinforcing component 130 further includes a plurality of herringbone reinforcing steel bars 132 arranged at intervals along the longitudinal bridge, wherein the top ends of the herringbone reinforcing steel bars 132 are disposed in the asphalt layer 150, the bottom ends of the herringbone reinforcing steel bars 132 extend downward into the concrete layer 160, and the longitudinal reinforcing steel bars 131 are welded to the inner sides of the herringbone reinforcing steel bars 132.

It should be noted that the portal reinforcement 132 can improve the shear resistance, and form a reinforcement mesh after being welded with the longitudinal reinforcement 131, so as to enhance the integrity of the pavement structure, and meanwhile, the portal reinforcement 132 can also effectively resist the crack of the pavement layer caused by shrinkage and temperature change, so that the longitudinal reinforcement 131 can be well matched to ensure the overall pavement strength of the expansion joint 111, wherein the portal reinforcement 132 of the existing bridge segment 110 can adopt a reinforcement planting mode, and the portal reinforcement 132 of the spliced-width bridge segment 120 can adopt a pre-buried mode, and preferably, the diameter of the portal reinforcement 132 is not less than 16mm.

As a preferred embodiment of the present utility model, the reinforcing steel bar reinforcing component 130 further includes hot rolled angle steel 133, and the hot rolled angle steel 133 is disposed in the asphalt layer 150 and welded to an end of the outer side of the top end of the herringbone reinforcing steel bar 132, which is close to the expansion joint 111.

It should be noted that the hot rolled angle steel 133 may have a better supporting and reinforcing effect on the road surface, and is welded to one end of the outer side of the top end of the inverted-v-shaped steel bar 132 near the expansion joint 111, so that when the vehicle passes through the expansion joint 111 to apply pressure load to the corners of the top surfaces of the two asphalt layers 150, the hot rolled angle steel 133 may have an edge protection effect, and preferably, the hot rolled angle steel 133 may be an equilateral angle steel 56mm by 8 mm.

Further, the asphalt layer 150 is filled between the two upper notches 171.

It should be noted that the gap of the asphalt layer 150 between the two upper notches 171 may be filled in such a manner as to improve the integrity and adaptability of the overall pavement and to improve the driving comfort.

Further, the width of the lower notch 172 is 15cm to 17cm, and the width of the upper notch 171 is 25cm to 27cm.

It should be understood that in view of the connection between construction cost and structural strength, in a preferred embodiment of the present application, the width of the lower notch 172 may be set to 15cm, and the width of the upper notch 171 may be set to 25cm, which may be selected by those skilled in the art according to actual needs.

Further, the longitudinal spacing distance between every two adjacent portal reinforcing bars 132 is 15 cm-17 cm.

It should be noted that, preferably, the welding seam forming is better, the stress of the welding point is more uniform, the stress concentration is reduced, and the length of the welding seam during welding is not less than 5 times of the diameter of the steel bar in consideration of the uniformity of the cost and the integral strength of the structure, and the double-sided welding mode is adopted between the portal steel bar 132 and the hot rolled steel bar 133 during connection.

Further, the existing bridge section 110 and the spliced wide bridge section 120 each comprise a bridge deck pavement layer 121 and a bridge deck cast-in-situ layer 122 which are arranged from top to bottom, and a waterproof layer 123 is coated between the bridge deck pavement layer 121 and the bridge deck cast-in-situ layer 122.

It should be noted that, the bridge deck pavement layer 121 and the bridge deck cast-in-situ layer 122 are pavement structures with the existing bridge section 110 and the spliced wide bridge section 120 each having the expansion joint 111 removed, and include the bridge deck pavement layer 121 and the bridge deck cast-in-situ layer 122, and the waterproof layer 123 is disposed between the bridge deck pavement layer 121 and the bridge deck cast-in-situ layer 122, so that moisture penetration can be effectively blocked, the base layer and the soil base can be protected, diseases can be reduced, the service life of the pavement can be prolonged, and driving comfort and safety can be improved.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. A structure suitable for a longitudinal expansion joint of a spliced wide bridge is characterized by comprising an existing bridge section, a spliced wide bridge section, a reinforcing steel bar reinforcing component, a sealing structure, an asphalt layer and a concrete layer which are sequentially arranged from top to bottom,

The cantilever ends of the existing bridge section and the cantilever ends of the spliced wide bridge section are arranged at intervals to form expansion joints, the cantilever ends of the existing bridge section and the cantilever ends of the spliced wide bridge section are respectively concavely formed with step-type notches which are oppositely arranged along the transverse bridge direction, wherein,

Each stepped notch comprises an upper notch and a lower notch, the concrete layer is connected in the two lower notches, the sealing structure is connected between the two concrete layers, and the asphalt layer is connected in the two upper notches;

Each step-type notch is internally connected with a reinforcing steel bar reinforcing component, and the reinforcing steel bar reinforcing components in the two step-type notches are oppositely arranged along the transverse bridge.

2. The structure for a longitudinal expansion joint of a bridge of claim 1, wherein the reinforcing steel bar reinforcing component comprises a plurality of longitudinal reinforcing steel bars, each two longitudinal reinforcing steel bars are arranged at intervals along the transverse direction of the bridge, one longitudinal reinforcing steel bar group is arranged in the concrete layer, and two longitudinal reinforcing steel bar groups are arranged at intervals along the vertical direction in the asphalt layer.

3. The structure for a longitudinal expansion joint of a bridge of claim 2, wherein the reinforcing member further comprises a plurality of gables arranged at intervals along the longitudinal bridge, the tops of the gables are disposed in the asphalt layer, the bottoms of the gables extend downward into the concrete layer, and the longitudinal reinforcing members are welded to the inner sides of the gables.

4. The structure for a longitudinal expansion joint of a bridge girder according to claim 3, wherein the reinforcing bar reinforcing assembly further comprises hot rolled angle steel which is disposed in the asphalt layer and welded to an end of the outer side of the top end of the gabled steel close to the expansion joint.

5. The structure for a longitudinal expansion joint of a bridge of claim 1, wherein said sealing structure is a sponge sealing strip.

6. The construction for a longitudinal expansion joint of a bridge of claim 1, wherein said asphalt layer is filled between two of said upper notches.

7. The structure of claim 1, wherein the width of the lower notch is 15 cm-17 cm and the width of the upper notch is 25 cm-27 cm.

8. The structure suitable for the longitudinal expansion joint of the spliced wide bridge according to claim 3, wherein the longitudinal spacing distance between every two adjacent portal reinforcing bars is 15 cm-17 cm.

9. The structure for a longitudinal expansion joint of a bridge of claim 1, wherein the existing bridge section and the spliced wide bridge section each comprise a bridge deck pavement layer and a bridge deck cast-in-situ layer which are arranged from top to bottom, and a waterproof layer is coated between the bridge deck pavement layer and the bridge deck cast-in-situ layer.

10. The structure suitable for a longitudinal expansion joint of a spliced wide bridge according to claim 1, wherein the width of the expansion joint is 1 cm-2 cm.