CN220057613U - Tunnel type combined bridge abutment structure and road-bridge overpass structure - Google Patents

Abstract

The utility model discloses a tunnel type combined bridge abutment structure which comprises a tunnel structure arranged above a road, wherein the tunnel structure is of a box-shaped structure which is formed by combining a bottom plate, a top plate and a pair of side walls, the bottom plate is arranged on the road, the trend of the side walls is consistent with that of the road, a cap beam is fixedly arranged on the top plate, and an ear back wall is fixedly arranged on the cap beam. The utility model also provides a road-bridge interchange structure. The tunnel type combined bridge abutment structure and the road-bridge overpass structure realize the functions of supporting the upper structural load of the bridge abutment, resisting the horizontal soil pressure and the downward running of the tunnel, and do not influence the erection of the bridge by adopting standard span precast beams and the use of the existing road.

Description

Tunnel type combined bridge abutment structure and road-bridge overpass structure

Technical Field

The utility model belongs to the field of bridges, and particularly relates to a bridge abutment structure and a bridge erection structure.

Background

The construction concept of green and low-carbon highways is currently becoming industry consensus. The standardized and serialized design of the bridge and culvert of the highway is realized, and the prefabricated assembly and industrialization of bridge and culvert construction are important contents of green highway construction. In order to ensure engineering quality, accelerate construction speed and reduce engineering cost, a prefabricated assembled concrete bridge generally adopts a standard span. Under the guidance of the strategy of the national and rural vibration of the strong traffic, the traffic industry in China develops rapidly, and the highway construction is gradually pushed to the mountain heavy-hilly area. When the prefabricated bridge with standard span is used for crossing valley roads and rivers, the bridge is limited by the topography and the topography at the bridge site, the longitudinal adjustable margin of the bridge is not large, and the situation that the bridge abutment falls on the existing road often occurs (as shown in figure 1).

In view of the above, the following two methods are generally adopted in the prior art:

1. bridge span is changed to span and span is increased. The end span is changed into a non-standard span with smaller span, the position of the original bridge abutment is changed into a bridge pier after the original bridge abutment is retreated beyond the existing road, and then a span is added to enable the bridge to span the existing road (as shown in figure 2), and the existing road is reserved. The problems with the above described modes of operation are as follows: the addition of the nonstandard span causes inconvenience to prefabrication construction, and nonstandard templates, prefabrication pedestals, girder transporting equipment and the like are required to be additionally arranged. The bridge length is increased, and the last bridge has a quite long section to enter into the cutting (or tunnel) to cause waste, so that the difficulty and the safety risk of erecting the bridge in the tunnel are high. The above problems not only increase the construction cost, but also cause an extended construction period.

2. The existing road changes the road. The problems with the above described modes of operation are as follows: limited by natural conditions such as mountain land topography, the cost of existing roads for changing routes is great, or high filling and high slope excavation occur, a large amount of slope supporting engineering is needed to be additionally arranged, or the length of line changing is too great, so that the possibility of reality is not available. The problems not only increase the construction cost and prolong the construction period, but also have great damage to the natural environment of the mountain area, and the construction and operation sections have great safety risks.

Therefore, aiming at the situation that the bridge abutment falls on the existing road in the prior art, the bridge abutment structure which is low in construction cost, free from adding a non-standard span and capable of avoiding the existing road from being changed is provided, and has important significance for realizing the standard span prefabricated bridge Liang Shunli to span valley roads and rivers.

Disclosure of Invention

The utility model aims to solve the technical problems of overcoming the defects and the shortcomings in the background technology, and provides a tunnel type combined bridge abutment structure and a road-bridge interchange structure which have low construction cost, do not need to increase nonstandard spans and avoid the existing road from changing. In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model provides a tunnel formula combination abutment structure, is including locating the tunnel structure of road (existing road) top, the tunnel structure is the inside hollow box structure that forms by bottom plate, roof and a pair of side wall combination, the road is located to the bottom plate, the trend of side wall is unanimous with the road trend, cap roof beam has set firmly on the roof, set firmly the ear back wall on the cap roof beam.

In the above-mentioned tunnel type combined bridge abutment structure, preferably, the roof is fixedly provided with a longitudinal beam with an end extending to the side wall, the bottom of the cap beam is provided with a channel for accommodating the longitudinal beam, the cap beam is arranged on the longitudinal beam through the channel, and the rest of the bottoms (except other bottoms at the channel) of the cap beam are clung to the roof. According to the utility model, through the arrangement of the longitudinal beams (two beams are preferably arranged and are perpendicular to the cap beams), the vertical load of the cap beams is transferred to the side wall, and the load born by the top plate is reduced. The hat beam and the longitudinal beam can be of an integral structure obtained by casting and molding together.

In the above-mentioned tunnel type combined bridge abutment structure, preferably, the roof is provided with an edge stone, and the edge stone is located at two side edges of the roof perpendicular to the road trend. The effect of the edge stone is mainly to prevent rainwater and sediment above the opening from falling into the lower road.

In the above-mentioned tunnel type combined bridge abutment structure, preferably, two sides of the bottom plate, which are consistent with the direction of the road, are provided with wall toes. The arrangement of the wall toe is beneficial to improving the stress of the optimized bottom plate and improving the bearing capacity of the optimized bottom plate.

In the above-mentioned tunnel type combined bridge abutment structure, preferably, the road is provided with a manual replacing and filling compaction foundation for meeting the bearing capacity requirement, and the bottom plate is arranged on the manual replacing and filling compaction foundation. By arranging manual replacement and compaction of the foundation, the foundation bearing capacity and uneven settlement can meet the design requirement. The bottom plate adopts the whole plate type foundation and the manual replacement and filling compaction foundation, so that better geological conditions of the mountain side slope are fully utilized, the bearing capacity and deformation requirements can be met, the construction cost is saved compared with a common pile foundation, the construction period is shortened, the problem that the pile foundation drilling slurry pollutes the environment is avoided, and the method is more friendly to the environment.

In the tunnel type combined bridge abutment structure, preferably, a plurality of lighting windows are formed in the side walls. The lighting window is arranged on the side wall of the bench opening, so that ventilation and illumination conditions in the tunnel structure can be effectively improved, and the oppression to traffic participants is avoided.

In the tunnel type combined bridge abutment structure, preferably, the tunnel structure, the longitudinal beams, the hat beams and the ear back wall are integrated into a cast-in-situ structure. The components of the tunnel type combined bridge abutment are fixedly connected together, and a cast-in-situ reinforced concrete structure is adopted, so that the tunnel type combined bridge abutment has the advantages of simple structure, definite stress, strong field adaptability of the cast-in-situ structure, structural integrity and good shock resistance.

The utility model also provides a road-bridge interchange structure which comprises a road and a bridge, wherein the side span main beam of the bridge is erected on the road through the tunnel type combined bridge abutment structure.

In the road-bridge interchange structure, preferably, the main beams of the bridge are all prefabricated beams with the same span, and the hollow part in the box-shaped structure is used for passing vehicles, pedestrians or pipeline ditches. The bridge span structure of the utility model keeps the standard span completely by the structural design, avoids the problem that the non-standard span and the terminal span enter the cutting excavation, effectively reduces the construction project amount, effectively shortens the construction period and greatly reduces the construction cost.

The bridge (bridge abutment) and the tunnel are combined, the functions of supporting the upper structural load of the bridge abutment, resisting the horizontal soil pressure and enabling the tunnel to pass downwards are achieved, the defects that the bridge is limited by the topography of the bridge site when the prefabricated bridge with the standard span spans the valley road and the river, the bridge is small in longitudinal adjustable margin and falls on the existing road are overcome, and the traditional methods of bridge span changing, span increasing, bridge under changing and the like are avoided. The bridge span structure keeps the standard span completely, so that the problem that the nonstandard span and the terminal span enter the cutting excavation is avoided, the construction engineering quantity is effectively reduced, the construction period is effectively shortened, and the engineering cost is greatly reduced. The situation that the existing road of mountain canyon is changed to have high filling and high slope excavation, a large amount of supporting projects are needed, and the safety risks in construction and operation periods are large is avoided, so that the construction cost is effectively reduced, the construction period is shortened, and the project safety risks are reduced.

Compared with the prior art, the utility model has the advantages that:

1. the tunnel type combined bridge abutment structure and the road-bridge overpass structure realize the functions of supporting the upper structural load of the bridge abutment, resisting the horizontal soil pressure and the downward running of the tunnel at the same time, and do not influence the use of the existing road while the bridge is erected by adopting the prefabricated beams with the same span. Compared with bridge span changing and span increasing and road changing in the prior art, the method has the characteristics of saving engineering quantity, reducing engineering cost, shortening construction period, being high in construction and later operation safety, small in influence on environment and the like, and has remarkable environmental protection and economic benefits.

2. According to the tunnel type combined bridge abutment structure and the road-bridge overpass structure, bridges are erected on the existing roads, and the side walls and the top plates of the bridge abutment structure form shed tunnel protection for the roads under the bridges, so that potential safety hazards caused by roof falling stones and collapse on the roads under the bridges are effectively prevented, and the safety of the existing roads is improved.

3. The tunnel type combined bridge abutment structure and the road-bridge overpass structure have the advantages of simple structure, convenient construction and the like, and can be widely applied to scenes limited by the topography and topography of bridge sites when the prefabricated assembled bridge with standard span spans the valley roads and rivers.

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 some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a bridge abutment falling on an existing road in the prior art.

Fig. 2 is a schematic diagram of a bridge span-changing and span-increasing structure in the prior art.

Fig. 3 is a schematic structural diagram of a road-bridge overpass structure in an embodiment.

Fig. 4 is an elevation view of a tunnel type composite abutment structure in an embodiment.

Fig. 5 is a side view of a tunnel type composite abutment structure in an embodiment.

Fig. 6 is a top view of a tunnel type composite abutment structure according to an embodiment.

Legend description:

1. a road; 11. manually replacing and filling the compacted foundation; 12. paving a road surface; 2. a tunnel structure; 21. a bottom plate; 211. wall toe; 212. a lighting window; 22. a top plate; 23. a side wall; 3. a cap beam; 4. an ear back wall; 5. a longitudinal beam; 6. stone edge; 7. precast beams with the same span; 8. a non-standard span precast beam; 9. cutting (or tunneling); 10. and (5) backfilling the bench back.

Detailed Description

The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the utility model, but the scope of the utility model is not limited to the specific embodiments shown.

Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present utility model.

Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present utility model are commercially available or may be prepared by existing methods.

Examples:

as shown in fig. 4-6, the tunnel type combined bridge abutment structure of the present embodiment includes a tunnel structure 2 disposed above a road 1, the tunnel structure 2 is a box structure formed by combining a bottom plate 21, a top plate 22 and a pair of side walls 23, the bottom plate 21 is disposed on the road 1, the trend of the side walls 23 is consistent with that of the road 1, a cap beam 3 is fixedly disposed on the top plate 22, and an ear back wall 4 is fixedly disposed on the cap beam 3.

In this embodiment, the top plate 22 is fixedly provided with two stringers 5 with ends extending to the side walls 23, the bottom of the cap beam 3 is provided with a channel for accommodating the stringers 5, the cap beam 3 is arranged on the stringers 5 through the channel, and the rest of the bottom of the cap beam 3 is tightly attached to the top plate 22. In other embodiments the number of stringers 5, the angle of intersection of cap beams 3 with stringers 5 may also be adjustable.

In this embodiment, the roof 22 is provided with the along stone 6, and the along stone 6 is located at two side edges of the roof 22 perpendicular to the direction of the road 1.

In this embodiment, the two sides of the soleplate 21, which are consistent with the direction of the road 1, are provided with wall toes 211.

In this embodiment, the road 1 is provided with a manual reclamation compacting foundation 11 for meeting the load-bearing capacity requirement, and the bottom plate 21 is disposed on the manual reclamation compacting foundation 11. The bottom of the interior of the box-like structure is provided with a pavement 12.

In this embodiment, a plurality of lighting windows 212 are formed on the side wall 23.

In this embodiment, the tunnel structure 2, the longitudinal beam 5, the cap beam 3 and the ear back wall 4 are an integral cast-in-situ structure.

As shown in fig. 3, the road-bridge overpass structure of the present embodiment includes a road 1 and a bridge, and a side span main beam of the bridge is arranged on the road 1 through the above-mentioned tunnel type combined bridge abutment structure.

In this embodiment, the main beams of the bridge are all prefabricated beams 7 with the same span, and the hollow part in the box-shaped structure is used for passing vehicles, pedestrians or pipeline trenches.

By adopting the road-bridge overpass structure in the embodiment, the girder of the bridge can allow the precast beams 7 with the same span, so that the problem that when the bridge abutment falls on the existing road 1 in the prior art, the non-standard span precast beam 8 is needed when the bridge is changed to span and the newly added precast beam 7 with the same span is avoided from entering the cutting (or tunnel) 9. The side span main beam of the bridge is arranged on the road 1 through the tunnel type combined bridge abutment structure, and then the abutment back filling layer 10 is filled at one side of the ear back wall 4.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (9)

1. The utility model provides a tunnel formula combination abutment structure, its characterized in that, including locating tunnel structure (2) of road (1) top, tunnel structure (2) are by bottom plate (21), roof (22) and a pair of side wall (23) combination form inside hollow box structure, on road (1) was located to bottom plate (21), the trend of side wall (23) is unanimous with the road (1) trend, roof beam (3) have been set firmly on roof (22), set firmly on roof beam (3) ear back wall (4).

2. The tunnel type combined bridge abutment structure according to claim 1, wherein a longitudinal beam (5) with an end portion extending to a side wall (23) is fixedly arranged on the top plate (22), a channel for accommodating the longitudinal beam (5) is arranged at the bottom of the cap beam (3), the cap beam (3) is arranged on the longitudinal beam (5) through the channel, and the rest of the bottom of the cap beam (3) is tightly attached to the top plate (22).

3. The tunnel type combined bridge abutment structure according to claim 1, wherein an edge stone (6) is arranged on the top plate (22), and the edge stone (6) is positioned at two side edges of the top plate (22) perpendicular to the direction of the road (1).

4. The tunnel type combined bridge abutment structure according to claim 1, wherein the two sides of the bottom plate (21) which are consistent with the direction of the road (1) are provided with wall toes (211).

5. The tunnel type combined bridge abutment structure according to claim 1, wherein a manual filling-replacing compaction foundation (11) for meeting the bearing capacity requirement is arranged on the road (1), and the bottom plate (21) is arranged on the manual filling-replacing compaction foundation (11).

6. The tunnel type combined bridge abutment structure as claimed in any one of claims 1-5, wherein a plurality of lighting windows (212) are formed in the side wall (23).

7. The tunnel type combined bridge abutment structure according to any one of claims 2 to 5, wherein the tunnel structure (2), the longitudinal beams (5), the hat beams (3) and the ear back wall (4) are integrated cast-in-situ structures.

8. A road-bridge overpass structure comprising a road (1) and a bridge, wherein the bridge side span main beam is arranged on the road (1) through the tunnel type combined bridge abutment structure as set forth in any one of claims 1-7.

9. Road-bridge overpass structure according to claim 8, characterized in that the girders of the bridge are all prefabricated girders (7) of the same span, the internal hollow of the box structure being used for vehicle traffic, pedestrian traffic or pipeline trench passage.