Multifunctional bridge high fill abutment structure

Abstract

The utility model relates to a kind of high fill abutment structure of multi-functional bridge, belong to municipal bridge engineering field, including reinforcing section tunnel, pile foundation located below reinforcing section tunnel and abutment body located above reinforcing section tunnel, abutment body does one level embankment structure, it includes caisson bottom plate, caisson front wall, caisson back wall, caisson top plate and caisson baffle, abutment body uses caisson structure, abutment body is provided with bridge superstructure, bridge superstructure is erected with large pipeline above flood level, abutment body is provided with hole, hole is arranged with large pipeline in riverbed bottom, the thinking of caisson structure is integrated into abutment structure, and the role of embankment is also considered, and pipeline crossing bridge and tunnel are jointly built, improve the utilization of abutment, realize bridge and tunnel, embankment, pipeline coexistence by three-dimensional space integration, avoid relocation, reduce engineering coordination difficulty, overcome the expensive cost produced by traditional relocation pipeline or change tunnel position or change bridge site method.

Description

Technical Field

[0001] This utility model belongs to the field of municipal bridge engineering design, and relates to a high-fill abutment structure for multifunctional bridges, and more particularly to a high-fill abutment structure for bridges co-constructed with tunnels, embankments and pipelines. Background Technology

[0002] With the development of Chinese society, urban bridges have become increasingly complex. When bridge abutments intersect with tunnels, embankments, and pipelines, how to handle the relationships between them is often a key challenge in engineering projects.

[0003] When faced with the above situations, the usual methods to relocate pipelines, change the location of tunnels, or change the location of bridges are to be chosen. However, traditional methods of relocating pipelines, tunnels, or changing the location of bridges are not only difficult to coordinate, but also costly.

[0004] Therefore, when joint construction is unavoidable, there is an urgent need for a high-fill bridge abutment structure that can achieve the joint construction function of bridge abutments while ensuring safety, economy, and aesthetics. Utility Model Content

[0005] In view of this, in order to solve the problems that traditional methods of relocating pipelines or tunnels or changing bridge sites are not only difficult to coordinate and costly, this utility model provides a high-fill abutment structure for multifunctional bridges, which can effectively integrate the abutment with tunnels, embankments and pipelines, and achieve the coexistence of the abutment with tunnels, embankments and pipelines.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-fill abutment structure for a multifunctional bridge includes a reinforced tunnel section, pile foundations located below the reinforced tunnel section, and an abutment body located above the reinforced tunnel section. The abutment body also serves as a primary embankment structure, comprising a caisson bottom slab, a caisson front wall, a caisson rear wall, a caisson top slab, and a caisson partition. The abutment body adopts a caisson structure, and a bridge superstructure is installed on the abutment body. Large pipelines above the flood level are erected on the bridge superstructure, and the abutment body has openings in which large pipelines from the riverbed are laid.

[0008] Furthermore, the holes adopt a high-strength steel pipe structure, and the steel pipe wall is connected to the bridge abutment body by shear studs. One end of the shear stud is welded to the steel pipe wall, and the other end is anchored to the front wall and rear wall of the caisson.

[0009] Furthermore, the inner surface of the steel pipe wall is fitted with rubber waterproofing filler to connect with large pipelines at the bottom of the riverbed.

[0010] Furthermore, the abutment body is an integral caisson-type abutment body, and the caisson structure and the abutment body are made of reinforced concrete.

[0011] Furthermore, several supports for the bridge superstructure are installed at the bottom of the bridge superstructure.

[0012] Furthermore, the bridge superstructure is arranged in a left-right configuration, with large pipelines above the flood level located between the left and right bridge sections.

[0013] Furthermore, the caisson partitions are made of multi-compartment reinforced concrete.

[0014] Furthermore, the pile foundation is a pile group foundation.

[0015] Furthermore, the tunnel is an integral tunnel, and the tunnel structure at the abutment is a reinforced section with increased size and stronger reinforcement.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. A high-fill abutment structure for multifunctional bridges, resolving spatial conflicts in a coordinated manner; incorporating the concept of caisson structure into the abutment structure, while also taking into account the role of the embankment, pipeline crossings, and co-construction with tunnels, improving the utilization rate of the abutments; through three-dimensional spatial integration, eliminating physical conflicts between structures, realizing the coexistence of bridges with tunnels, embankments, and pipelines, avoiding relocation, reducing the difficulty of engineering coordination, and overcoming the expensive costs of traditional methods of relocating pipelines, changing tunnel locations, or changing bridge locations.

[0018] 2. A multifunctional bridge abutment structure for high-fill environments, with structural optimization; the caisson structure forms a box-shaped cross-section, using partitions to divide multiple compartments, enhancing overall bending / torsional stiffness; and adopts a variable cross-section, with the bottom cross-section linearly varying to the maximum, which can better meet the stress requirements, optimize the stress path, and reduce redundant materials; compared with buttress abutments, the caisson abutment body, due to the addition of the rear wall of the caisson, can be equipped with more tensile reinforcement, greatly meeting the stress requirements, making it very suitable for abutments with higher fill.

[0019] 3. A high-fill abutment structure for a multifunctional bridge, with structural safety achieved through the co-construction of tunnel and abutment; the reinforced tunnel section directly bears the abutment load; and the pile foundation disperses the load to the deep soil layer, reducing tunnel settlement.

[0020] 4. A multifunctional bridge abutment structure with high embankment, allowing for the safe passage of large pipelines; high-strength steel pipe holes are drilled in the abutment body, with shear studs welded to the inner wall and anchored to concrete; rubber waterstop material is filled between the steel pipe and the pipeline to accommodate deformation and prevent seepage. This design ensures both the structural safety of the abutment and the safe passage of pipelines across the bridge.

[0021] 5. A high-fill abutment structure for a multifunctional bridge, integrating the functions of the embankment; eliminating the independent embankment structure, with the front wall of the abutment serving as the embankment retaining wall, the top elevation matching the flood control standard, and the rear wall retaining soil to form the embankment slope.

[0022] 6. A high-fill bridge abutment structure for multifunctional bridges, which is safe, economical and aesthetically pleasing; the abutment body is an integral caisson-type abutment body, which realizes the co-construction of bridges, tunnels, embankments and pipelines under the premise of ensuring safety, economy and aesthetics.

[0023] This utility model adopts a caisson structure + bridge abutment + pipeline holes + embankment function, which can bring about the synergistic effect of space integration, stress optimization and cost saving.

[0024] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is an elevation view of the high-fill abutment structure of the multifunctional bridge of this utility model.

[0027] Figure 2 This is a plan view of the high-fill abutment structure of the multifunctional bridge of this utility model;

[0028] Figure 3 This is a cross-sectional view of the pile foundation of the high-fill abutment structure of the multifunctional bridge of this utility model.

[0029] Figure 4 This is a detailed drawing of the pipeline opening in the high-fill abutment structure of the multifunctional bridge of this utility model.

[0030] Attached reference numerals: 1. Reinforced tunnel section; 2. Pile foundation; 3. Caisson bottom slab; 4. Caisson front wall; 5. Caisson rear wall; 6. Caisson top slab; 7. Caisson partition; 8. Large pipelines on the riverbed; 9. Large pipelines above the flood level; 10. Support; 11. Bridge superstructure; 12. Shear studs; 13. Steel pipe wall; 14. Rubber waterstop filler. Detailed Implementation

[0031] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] The tunnel is a monolithic tunnel, with a reinforced section at the abutment, featuring increased dimensions and stronger reinforcement. Large pipelines generally refer to pipes with a diameter of not less than 1000mm, and high-fill abutments generally refer to abutments with a backfill height of not less than 10 meters.

[0033] like Figures 1-4 The high-fill abutment structure of a multifunctional bridge shown includes a reinforced tunnel 1, pile foundations 2 located below the reinforced tunnel 1, and abutment body located above the reinforced tunnel 1.

[0034] Pile foundation 2 adopts a pile group foundation, which disperses the load to the deep soil layer, reduces tunnel settlement, and achieves stress safety.

[0035] The bridge abutment adopts a caisson structure, which is an integral caisson bridge abutment body. The caisson structure and the bridge abutment body are made of reinforced concrete.

[0036] The caisson abutment also serves as a primary embankment structure. It comprises a caisson bottom slab 3, a caisson front wall 4, a caisson rear wall 5, a caisson top slab 6, and a caisson partition 7. The partition 7 is a multi-compartment reinforced concrete partition. A bridge superstructure 11 is installed on the abutment. The bridge superstructure 11 supports large pipelines 9 above the flood level. Several supports 10 are installed at the bottom of the bridge superstructure 11. The bridge superstructure 11 is arranged in a left-right configuration, with the large pipelines 9 above the flood level located between the left and right bridge sections.

[0037] The abutment has openings in its body, within which large pipelines 8 are installed. The openings are constructed of high-strength steel pipes, with steel pipe walls 13 connected to the abutment body via shear studs 12. One end of each shear stud 12 is welded to the steel pipe wall 13, while the other end is anchored to the front wall 4 and rear wall 5 of the caisson. The shear studs 12 are cylindrical head weld studs manufactured using cold forging or hot working processes, primarily made of ML15Al or ML15 steel, conforming to national standards such as G13B10433-2002. The steel pipe wall 13 is made of Q345NHD steel, with a wall thickness that can be selected from 16mm to 25mm depending on the stress. The inner surface of the steel pipe wall 13 is fitted with rubber water-stopping filler 14 to seal the gap between the steel pipe wall (13) and the large pipelines (8) on the riverbed, preventing water infiltration. The filler can be an elastic sealing material such as water-swellable rubber strips, rubber waterstops, or polyurethane sealant.

[0038] In a preferred embodiment, a water-swellable rubber strip is used. During installation, it is wrapped around the outer wall of the large pipeline (8) at the bottom of the riverbed and inserted into the steel pipe hole along with the pipeline. After encountering water, it expands in volume and can automatically press the outer wall of the pipeline and the inner wall of the steel pipe to form a reliable flexible waterproof sealing layer. It can also adapt to the slight deformation caused by temperature and load changes between the bridge abutment structure and the pipeline.

[0039] When high-fill bridge abutments require co-construction with embankments, tunnels, and pipelines that cannot avoid each other, the specific implementation steps are as follows:

[0040] S1. Determine the bridge span and location, then determine the backfill height behind the abutment, and use these factors to determine the size of the caisson abutment.

[0041] S2. Based on the size of the caisson abutment, the tunnel is reinforced and the dimensions and reinforcement of the reinforced section tunnel 1 and pile foundation 2 are determined.

[0042] S3. For pipelines that need to cross the bridge, holes should be made in the abutments.

[0043] S4. Complete the construction of pile foundation 2, reinforced tunnel 1, bridge abutment body, and reinforced water-stopping treatment of holes in the bridge abutment body from bottom to top.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-fill abutment structure for a multifunctional bridge, characterized in that, The structure includes a reinforced tunnel section, pile foundations located below the reinforced tunnel section, and a bridge abutment body located above the reinforced tunnel section. The bridge abutment body also serves as a primary embankment structure, comprising a caisson bottom slab, a caisson front wall, a caisson rear wall, a caisson top slab, and a caisson partition. The bridge abutment body adopts a caisson structure, and a bridge superstructure is installed on the bridge abutment body. The bridge superstructure supports large pipelines above the flood level, and the bridge abutment body has openings in which large pipelines from the riverbed are laid.

2. The high-fill bridge abutment structure as described in claim 1, characterized in that, The hole adopts a high-strength steel pipe structure, and the steel pipe wall is connected to the bridge abutment body by shear studs. One end of the shear stud is welded to the steel pipe wall, and the other end is anchored to the front wall and rear wall of the caisson.

3. The high fill abutment structure according to claim 2, wherein The inner surface of the steel pipe is fitted with a rubber waterproofing filler that connects to the large pipeline at the bottom of the riverbed.

4. The high fill abutment structure according to claim 1, wherein The abutment body is an integral caisson-type abutment body, and the caisson structure and the abutment body are made of reinforced concrete.

5. The high fill abutment structure according to claim 1, wherein The bridge superstructure has several supports at its bottom.

6. The high fill abutment structure according to claim 5, wherein The superstructure of the bridge is arranged in left and right sections, with large pipelines above the flood level located between the left and right sections of the bridge.

7. The high fill abutment structure according to claim 1, wherein The caisson partition is a multi-compartment reinforced concrete partition.

8. The high-fill bridge abutment structure as described in claim 1, characterized in that, The pile foundation is a pile group foundation.

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