Groove-type girder bridge and flood prevention channel bridge abutment integrated structure adaptive to test run line

Abstract

The invention relates to a channel girder bridge and flood prevention channel bridge abutment integrated structure adaptive to a test run line. The channel girder bridge and flood prevention channel bridge abutment integrated structure comprises a rectangular hollow bridge abutment and a prestressed concrete channel girder. The rectangular hollow bridge abutments are located on the two transverse sides of the river channel and internally provided with rectangular channels penetrating in the upstream and downstream directions of the river channel, and the rectangular channels communicate with the flood prevention channels. The two transverse ends of the prestressed concrete channel beam are supported to the top of the inner side of the rectangular hollow bridge abutment. In the integrated structure, the channel beams reduce the line elevation to adapt to the flat slope of the test line and the flood control clearance requirement, the hollow bridge abutment is used for the flood control channel to penetrate downwards, the continuity and the traffic capacity of the flood control channel are met, and meanwhile the situation that the flood control channel bypasses the bridge abutment to cause poor plane line deformation is avoided; the problems of investment increase, land waste and function conflict are synchronously solved; meanwhile, the thickened areas are arranged at the ends of the groove-shaped beams, and the problem that the rigidity of the opening structure of the groove-shaped beams is weak is solved.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, specifically to an integrated structure of a trough beam bridge and a flood control channel abutment adapted to a test track. Background Technology

[0002] A test track is a route used for dynamic testing of new vehicles, overhauled vehicles, or new systems. Its bridges must meet extremely high requirements for smoothness and stability, demanding very high quality in foundation treatment and pile foundation construction. Overload preloading is mandatory to ensure near-zero post-construction settlement and differential settlement. During testing, vehicles need to reach their maximum design speed, and acceleration and braking performance must be tested. Any minor track irregularities can affect the accuracy of test data and even pose safety hazards. If the test track is located in a river environment, it will bring additional constraints and risks to construction; the construction plan must include detailed flood control and navigation protection measures.

[0003] Two major contradictions exist in the construction of bridges for cross-river rail transit test lines. First, the test lines must be strictly designed with level slopes, but to meet flood control clearance requirements, traditional simply supported box girders, due to their high construction height, necessitate raising the track elevation, which in turn raises the overall vehicle depot level, significantly increasing project investment and construction time. Second, flood control channels need to be constructed on both sides of the river. However, due to the obstruction of traditional solid bridge abutments, these channels must be rerouted, disrupting channel continuity, affecting emergency response efficiency, and requiring additional land, resulting in a deterioration in the horizontal alignment of the flood control channels.

[0004] Therefore, it is necessary to propose new measures to overcome the above-mentioned shortcomings. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated structure of a trough beam bridge and a flood control channel abutment that is compatible with test tracks, so as to solve the problems of high engineering investment, poor continuity and additional land occupation in existing projects.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An integrated structure for a trough beam bridge and a flood control channel bridge abutment adapted to a test track is provided. The integrated structure includes a rectangular hollow bridge abutment and a prestressed concrete trough beam.

[0008] The rectangular hollow bridge abutment is located on both sides of the river channel. The rectangular hollow bridge abutment has a rectangular channel running through the upstream and downstream direction of the river channel. The rectangular channel is connected to the flood control channel.

[0009] The two transverse ends of the prestressed concrete trough beam are supported on the top of the inner side of the rectangular hollow bridge abutment.

[0010] Furthermore, the flood control channel and the rectangular hollow bridge abutment form an underpass spatial three-dimensional intersection structure.

[0011] Furthermore, the rectangular passage within the rectangular hollow bridge abutment and the bottom of the flood control passage are paved with a hardened road surface.

[0012] Furthermore, the inner top of the rectangular hollow bridge abutment has a sunken support platform, and a support is provided on the top of the support platform. The end of the prestressed concrete trough beam is supported on the support.

[0013] Furthermore, the bottom of the rectangular hollow bridge abutment has an enlarged base.

[0014] Furthermore, the net width and net height of the rectangular passage within the rectangular hollow bridge abutment are the same as the net width and net height of the flood control road.

[0015] Furthermore, multiple prestressed concrete trough beams are arranged laterally, with their ends supported by bridge piers located within the river channel.

[0016] Furthermore, a pier support is provided on the top of the pier, and the end of the prestressed concrete trough beam is supported on the top of the pier support.

[0017] Furthermore, the prestressed concrete trough beam has a U-shaped cross-section, including a bottom plate and two side webs, with a horizontal flange at the top of the web.

[0018] Furthermore, the ends of the prestressed concrete trough beam have a thickened trough beam area.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention provides an integrated structure of a trough beam bridge and a flood control channel abutment adapted to a test track. The trough beam lowers the track elevation to meet the requirements of the test track's slope and flood control clearance. The hollow abutment allows the flood control channel to pass underneath, satisfying the continuity and traffic capacity of the flood control channel while avoiding the deterioration of the horizontal alignment caused by the flood control channel bypassing the abutment. This improves the beam end stiffness, load-bearing capacity, and deformation resistance, alleviates the problem of weak stiffness in the open structure of the trough beam, ensures stable load transfer, and simultaneously overcomes the problems of increased investment, land waste, and functional conflicts. At the same time, a thickened area is set at the end of the trough beam to alleviate the problem of weak stiffness in the open structure of the trough beam. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the integrated structure provided in an embodiment of the present invention.

[0023] Figure 2 This is a schematic cross-sectional view of the integrated structure provided in an embodiment of the present invention.

[0024] Figure 3 This is a structural elevation view of an integrated bridge abutment provided in an embodiment of the present invention.

[0025] Figure 4 This is a side view of the integrated structural bridge abutment provided in an embodiment of the present invention.

[0026] Figure 5 This is a plan view of the integrated structural bridge abutment provided in an embodiment of the present invention.

[0027] Figure 6 for Figure 2 AA cross-section diagram.

[0028] The diagram is labeled as follows:

[0029] 1- Rectangular hollow bridge abutment; 2- Flood control channel; 3- Prestressed concrete trough beam; 4- River channel; 5- Bridge pier; 6- Support; 7- Hardened road surface; 8- Trough beam bottom plate; 9- Trough beam web; 10- Trough beam flange plate; 11- Trough beam thickened area. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "lateral", "longitudinal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In this specific implementation, the direction of the river channel is defined as longitudinal, and the direction perpendicular to it is defined as transverse. Simultaneously, the side of the rectangular hollow bridge abutment closest to the river channel is defined as the inner side, and the side furthest from the river channel is defined as the outer side.

[0034] To address the core challenges in the construction of bridges for cross-river rail transit test tracks, such as controlling track elevation and ensuring the continuity of flood control channels, this invention provides an integrated structure of a trough-beam bridge and a flood control channel abutment, suitable for test track bridges of cross-river rail transit vehicle depots that require flood control channels.

[0035] like Figure 1 and Figure 2 The integrated structure includes a rectangular hollow bridge abutment 1 and a prestressed concrete trough beam 3.

[0036] Rectangular hollow bridge abutment 1 is located on both sides of the transverse direction of river channel 4. Inside rectangular hollow bridge abutment 1 is a rectangular passageway running upstream and downstream along river channel 4. The clear width can be set at 6 meters, and the clear height at 4.5 meters. These dimensions must meet the design requirements of flood control road 4 to ensure the smooth passage of large flood control vehicles and emergency rescue machinery. The clear width and height of the rectangular passageway are the same as those of flood control road 2. The rectangular passageway connects to flood control channel 2, which is directly constructed within the rectangular passageway, without requiring additional land outside the river channel boundary. This ensures the continuity, traffic capacity, and emergency rescue efficiency of flood control channel 2 while meeting the structural safety of the bridge and the flood control requirements of the river. To ensure the continuity of flood control channel 2, the rectangular passageway can be arranged diagonally within rectangular hollow bridge abutment 1, such as... Figure 3-5 To accommodate the orientation of flood control channel 2. In addition, the bottom of the rectangular hollow bridge abutment 1 is also equipped with an enlarged base to improve the structural stability of the rectangular hollow bridge abutment 1.

[0037] The flood control channel 2 and the rectangular hollow bridge abutment 1 form an underpass spatial three-dimensional intersection structure. The flood control channel 2 does not need to detour and can pass directly through the inside of the bridge abutment. Thus, without occupying additional land outside the river red line, the continuity and traffic capacity of the flood control channel are guaranteed. At the same time, the safety and stability of the bridge structure itself and the flood control requirements of the river channel are guaranteed. This avoids the problem of deterioration of the horizontal alignment of the flood control channel 2 due to detouring around the bridge abutment. Moreover, the flood control channel 2 is located between the blue line and the red line of the river channel 4, which significantly saves land resources.

[0038] The road surface of flood control channel 2 and the bottom of the rectangular channel within the rectangular hollow bridge abutment 1 are paved with hardened road surface 7, which ensures unobstructed flood control passages on the upstream and downstream embankment tops at both ends of the bridge and eliminates differences in road surface elevation and stiffness. The hardening treatment makes the road surface at the connection point smooth and flat, avoiding uneven settlement caused by different road surface materials. At the same time, it strengthens the load-bearing capacity of the connection point, enabling it to withstand the heavy impact of flood control vehicles, preventing damage and collapse of the road surface at the connection point, extending its service life, and ensuring the continuity and reliability of the passage.

[0039] The prestressed concrete trough beam 3 is the main beam of the integrated structure, and its two transverse ends are supported to the top of the inner side of the rectangular hollow abutment 1. The top of the inner side of the rectangular hollow abutment 1 has a sunken support platform, and a support 6 is provided on the top of the support platform. The ends of the prestressed concrete trough beam 3 are supported on the support 6.

[0040] like Figure 6 The prestressed concrete trough beam 3 has a U-shaped cross-section, including a bottom plate 8 and two side webs 9. The top of the webs 9 has a horizontal flange 10. This structure solves the problem of the test track requiring a level slope and meeting flood control clearance requirements, which forces the overall elevation of the vehicle depot to be raised. By using a low-height trough beam, the track elevation can be reduced as much as possible while meeting flood control clearance requirements, avoiding large-scale filling of the vehicle depot area and ultimately saving on project investment.

[0041] In addition, the prestressed concrete trough beam 3 has a thickened trough beam zone 11 within 1.3 m of its end. The bottom plate 8 and web plate 9 of the trough beam are also thickened, which improves the beam end stiffness, load-bearing capacity, and deformation resistance, alleviates the problem of weak stiffness in the open structure of the trough beam, and ensures stable load transfer. At the same time, it provides sufficient anchorage space for the prestressed steel strands, solves the problem of limited anchorage position of prestressed steel bars in the trough beam, and improves the mechanical stability of the anchorage node.

[0042] Depending on the width of the river channel 4, multiple prestressed concrete trough beams 3 can be arranged laterally, with their ends supported by piers 5 located within the river channel 4. Pier supports are provided on the top of the piers 5, and the ends of the prestressed concrete trough beams 3 are supported on the top of the pier supports.

[0043] The support platform of the rectangular hollow bridge abutment 1 is flush with the ground on both sides of the river channel 4, which further reduces the height of the prestressed concrete trough beam 3. The prestressed concrete trough beam 3 reduces the elevation of the line due to its low building height, which can effectively solve the technical problem of the test line of the rail transit vehicle depot needing to be sloped and meet the flood control clearance under the bridge, which leads to the overall elevation of the vehicle depot being raised and the project investment being increased.

[0044] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. An integrated structure of a test track's channel girder bridge and a flood control passage abutment, characterized in that: the integrated structure comprises a rectangular hollow abutment (1) and a prestressed concrete channel girder (3); the rectangular hollow abutment (1) is located on the lateral sides of a river (4), and the rectangular hollow abutment (1) has a rectangular passage inside, which penetrates along the upstream and downstream directions of the river (4) and is communicated with a flood control passage (2); and the prestressed concrete channel girder (3) is supported on the top of the inner side of the rectangular hollow abutment (1).

2. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 1, characterized in that: the flood control passage (2) and the rectangular hollow abutment (1) form a lower-penetrating spatial three-dimensional intersection structure.

3. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 2, characterized in that: the rectangular passage inside the rectangular hollow abutment (1) and the bottom of the flood control passage (2) are paved with a hardened road surface (7).

4. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 3, characterized in that: the inner top of the rectangular hollow abutment (1) has a sunken support platform, the top of the support platform is provided with a support (6), and the end of the prestressed concrete channel girder (3) is supported on the support (6).

5. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 4, characterized in that: the bottom of the rectangular hollow abutment (1) has an expanded base.

6. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 5, characterized in that: the net width and height of the rectangular passage inside the rectangular hollow abutment (1) are the same as the net width and height of the flood control passage (2).

7. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 6, characterized in that: a plurality of the prestressed concrete channel girders (3) are arranged transversely, and the ends thereof are supported by piers (5) arranged in the river (4).

8. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 7, characterized in that: the top of the pier (5) is provided with a pier support, and the end of the prestressed concrete channel girder (3) is supported on the top of the pier support.

9. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 8, characterized in that: the cross section of the prestressed concrete channel girder (3) is U-shaped, comprising a channel girder bottom plate (8) and channel girder web plates (9) on both sides, and the top of the channel girder web plate (9) has a horizontal channel girder flange plate (10).

10. The integrated structure of a test track's channel girder bridge and a flood control passage abutment according to claim 9, characterized in that: the end of the prestressed concrete channel girder (3) has a channel girder thickened area (11). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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