Lower support structure of special-shaped cover beam, orthogonal bridge and construction method thereof

Abstract

The application discloses a lower support structure adopting a special-shaped cover beam, which comprises a bridge pier and a special-shaped cover beam located above the bridge pier, the special-shaped cover beam comprises a first support beam body and a second force transmission beam body which are arranged in a cross manner, the first support beam body is located above the bridge pier and is directly connected with the bridge pier, and the second force transmission beam body is connected with the first support beam body and is used for bearing the load of an upper beam structure. The application further provides a bridge crossing a river / road in a skew manner and a construction method thereof. The application can better adapt to a terrain, can satisfy the realization of orthogonal arrangement of the bridge under different intersection angles of the bridge route and the intersected river and road, can avoid the adoption of the skew bridge which is complex in design and construction, can have the advantages of the skew bridge, is favorable for promoting the standardization of bridge design and construction, can reduce construction difficulty, can shorten a construction period, can save engineering investment, and can improve the durability of the bridge structure in a whole life cycle.

Description

Technical Field

[0001] This invention belongs to the field of bridges, and particularly relates to a substructure, a bridge, and a construction method thereof. Background Technology

[0002] Currently, the layout of small and medium-span bridges usually follows the overall route alignment, but the route inevitably intersects with intersecting rivers or roads at an angle. If the bridge is laid out orthogonally (with the cap beam perpendicular to the route alignment of the precast superstructure) to cross the river, it will lead to the piers in the river channel being misaligned, and the piers will increase the water resistance rate, which will have a significant impact on the intersecting river and may even affect the validity of the entire bridge design.

[0003] Therefore, when a route crosses a river or local road at an angle, the bridge inevitably adopts an skewed design, so that the cap beam above the piers forms an angle with the route direction of the precast superstructure, and the piers are positioned in the same direction as the water flow. Skewed bridges are more complex than orthogonal bridges in terms of design, construction, and stress, and are not conducive to standardization. In general, the skew angle of skewed bridges is controlled within 45° during design. When the skew angle exceeds 45°, the skewed bridge layout scheme is no longer applicable.

[0004] Therefore, it is necessary to propose a new structure to enable bridges to cross rivers or local roads at an angle. Summary of the Invention

[0005] The technical problem to be solved by this invention is to overcome the shortcomings and defects mentioned in the background art above, and to provide a substructure support structure using irregularly shaped cap beams, an orthogonal bridge, and a construction method thereof that is easy to construct, facilitates standardization, and has minimal impact on the roads of intersecting rivers. To solve the above technical problem, the technical solution proposed by this invention is as follows:

[0006] A substructure with an irregularly shaped cap beam includes a pier and an irregularly shaped cap beam located above the pier. The irregularly shaped cap beam includes a first support beam and a second force transmission beam arranged intersecting each other. The first support beam is located above the pier and directly connected to the pier. The second force transmission beam is connected to the first support beam and is used to bear the load of the superstructure.

[0007] In the aforementioned lower support structure using irregularly shaped cap beams, preferably, the first support beam and the second force transmission beam are integrally formed reinforced concrete structures, and the first support beam and the second force transmission beam are both located on the same horizontal plane and intersect at the middle.

[0008] In the aforementioned substructure using irregularly shaped cap beams, preferably, piers are provided below both ends of the first support beam, and tie beams are provided between adjacent piers. These tie beams can increase the overall stability of the structure.

[0009] In the aforementioned lower support structure using irregularly shaped cap beams, preferably, piers are provided below both ends of the first support beam, and piers are also provided below the intersection of the first support beam and the second force transmission beam, with tie beams provided between adjacent piers.

[0010] In the aforementioned lower support structure using irregularly shaped cap beams, preferably, the second force transmission beam has lateral stops at both ends.

[0011] As a general technical concept, the present invention also provides a bridge that crosses a river / road at an oblique angle, including an upper beam structure and a lower support structure with an irregularly shaped cap beam as described above. The upper beam structure is oblique to the direction of the river / road, the first support beam is set in the same direction as the river / road, and the upper beam structure is orthogonally mounted on the second force transmission beam through multiple supports.

[0012] As a general technical concept, the present invention also provides a construction method for the above-mentioned skew bridge crossing a river / road, comprising the following steps:

[0013] S1: Precast superbeam structure;

[0014] S2: Construction pier;

[0015] S3: Erect a support frame and installation template on the pier for constructing the first support beam and the second force transmission beam, tie the reinforcing bars in the first support beam and the second force transmission beam, pour concrete, cure and demold to obtain the first support beam and the second force transmission beam.

[0016] S4: Set up supports on the second force transmission beam and erect the upper beam structure to complete the construction.

[0017] This invention employs a substructure supporting an irregularly shaped cap beam, comprising an irregularly shaped cap beam to achieve orthogonal arrangement of the bridge, piers to transfer the load of the superstructure, tie beams to increase overall lateral stability, and pile foundations to transfer the load to the ground. The irregularly shaped cap beam consists of two parts: a first supporting beam parallel to the river or intersecting road direction, and a first force-transfer beam perpendicular to the bridge route to support the orthogonal precast superstructure. These two parts are integrated and cast together. The orthogonally arranged precast beams are connected to the irregularly shaped cap beam via supports, and the angle between the first supporting beam and the second force-transfer beam is determined according to the terrain.

[0018] This invention employs a substructure with an irregularly shaped cap beam. Through the structural design of the irregularly shaped cap beam, and by setting up a first supporting beam and a second force-transmitting beam, the two work together to ensure that the upper beam structure remains orthogonal to the cap beam. This solves the problem that skew bridges are more complex to design, construction, and stress than orthogonal bridges, and are not conducive to standardization, thus eliminating the need for traditional skew bridge designs. On the other hand, it also retains the advantages of traditional skew bridges, with the piers positioned in the same direction as the water flow or road, avoiding the impact of the piers on the river or road.

[0019] Overall, the present invention adopts a lower support structure with an irregularly shaped cap beam. The load-bearing capacity of this structure meets the design and construction requirements, and it has the characteristics of clear and reasonable stress distribution, convenient design and construction, fast construction speed, low cost, and minimal impact on the intersecting river channels and roads.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] The lower support structure of the irregularly shaped cap beam and the bridge using the above-mentioned lower support structure can adapt well to the terrain, meet the requirements of the bridge route and the different intersection angles with intersecting rivers and roads to achieve the orthogonal arrangement of the bridge, avoid the use of skew bridges which are more complicated in design and construction, and at the same time have the advantages of skew bridges. It is conducive to promoting the standardization of bridge design and construction, reducing construction difficulty, shortening the construction period, saving project investment, and improving the durability of the bridge structure throughout its entire life cycle. Attached Figure Description

[0022] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the lower support structure of the irregularly shaped cap beam used in Example 1.

[0024] Figure 2 This is a schematic diagram showing the positional relationship between the irregularly shaped cap beam and the river / road in Example 1.

[0025] Figure 3 for Figure 1 Floor plan.

[0026] Figure 4 for Figure 3 A cross-sectional view of plane AA.

[0027] Figure 5 for Figure 3 A cross-sectional view of the BB plane.

[0028] Figure 6 for Figure 5 A cross-sectional view of the C-plane.

[0029] Figure 7 This is a schematic diagram of the lower support structure of the irregularly shaped cap beam used in Example 2.

[0030] Legend:

[0031] 1. First supporting beam; 2. Pier; 3. Tie beam; 4. Pile foundation; 5. Second force transmission beam; 6. Lateral stop; 7. Support; S1. River / road schematic line; S2. Bridge alignment design schematic line; S3. River / road direction schematic line. Detailed Implementation

[0032] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0033] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0034] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0035] Example 1:

[0036] like Figures 1-6 As shown, the lower support structure of the irregular cap beam in this embodiment includes a pier 2 and an irregular cap beam located above the pier 2. The irregular cap beam includes a first support beam 1 and a second force transmission beam 5 arranged intersecting each other. The first support beam 1 is located above the pier 2 and is directly connected to the pier 2. The second force transmission beam 5 is connected to the first support beam 1 and is used to bear the load of the upper beam structure.

[0037] In this embodiment, the first supporting beam 1 and the second force-transmitting beam 5 are integrally formed reinforced concrete structures. The first supporting beam 1 and the second force-transmitting beam 5 are both located on the same horizontal plane and intersect at the middle.

[0038] In this embodiment, piers 2 are provided below both ends of the first supporting beam 1, and tie beams 3 are provided between adjacent piers 2.

[0039] In this embodiment, the second force transmission beam 5 is provided with lateral stops 6 at both ends.

[0040] This embodiment of an skewed bridge spanning a river / road includes an upper beam structure and a lower support structure employing an irregularly shaped cap beam. The upper beam structure is skewed to the direction of the river / road, and the first support beam 1 is oriented in the same direction as the river / road. The upper beam structure is orthogonally mounted on the second force-transmitting beam 5 via multiple supports 7. Specifically, as shown... Figure 2 As shown, the river / road schematic line S1 and the bridge route design schematic line S2 are obliquely intersecting. The first supporting beam 1 is parallel to the river / road direction schematic line S3, and the angle between it and the bridge route design schematic line S2 is α.

[0041] The construction method for the skew bridge crossing the river / road described in this embodiment includes the following steps:

[0042] S1: Precast superbeam structure;

[0043] S2: Construction pile foundation 4 and bridge pier 2;

[0044] S3: Erect supports and install templates on pier 2 for the construction of the first support beam 1 and the second force transmission beam 5, tie the steel bars in the first support beam 1 and the second force transmission beam 5, pour concrete, cure and demold to obtain the first support beam 1 and the second force transmission beam 5.

[0045] S4: Set up support 7 on the second force transmission beam 5 and erect the upper beam structure to complete the construction.

[0046] Example 2:

[0047] like Figure 7 As shown, this embodiment adopts a lower support structure of an irregularly shaped cap beam. Piers 2 are provided below both ends of the first support beam 1, and piers 2 are also provided below the intersection of the first support beam 1 and the second force transmission beam 5. Tie beams 3 are provided between adjacent piers 2. Other structures are the same as in embodiment 1.

[0048] The substructure with irregular cap beams and the bridge with the above substructure in the above embodiments can adapt well to the terrain, meet the requirements of the bridge route and the different intersection angles with intersecting rivers and roads to achieve the orthogonal arrangement of the bridge, avoid the use of skew bridges which are more complicated in design and construction, and at the same time have the advantages of skew bridges. This is conducive to promoting the standardization of bridge design and construction, reducing construction difficulty, shortening the construction period, saving project investment, and improving the durability of the bridge structure throughout its entire life cycle.

Claims

1. A lower support structure employing a special-shaped bent cap, characterized by, The application relates to a bridge pier (2) and a special-shaped bent cap above the bridge pier (2), wherein the special-shaped bent cap comprises a first support beam body (1) and a second force transmission beam body (5) which are arranged in a cross mode, the first support beam body (1) is arranged above the bridge pier (2) and is directly connected with the bridge pier (2), and the second force transmission beam body (5) is connected with the first support beam body (1) and is used for bearing the load of an upper beam structure. The first support beam body (1) and the second force transmission beam body (5) are integrated steel reinforced concrete structures, the first support beam body (1) and the second force transmission beam body (5) are located on the same horizontal plane and intersect at the middle part, and bridge piers (2) are arranged below the two ends of the first support beam body (1).

2. The lower support structure employing a special-shaped bent cap according to claim 1, wherein Tie beams (3) are arranged between adjacent bridge piers (2).

3. The lower support structure employing a special-shaped bent cap according to claim 1, wherein Bridge piers (2) are also arranged below the intersection part of the first support beam body (1) and the second force transmission beam body (5), and tie beams (3) are arranged between adjacent bridge piers (2).

4. The substructure with a special-shaped bent cap according to any one of claims 1-3, characterized in that, Side blocks (6) are arranged at the two ends of the second force transmission beam body (5).

5. A bridge for crossing a river / road at an angle, characterized in that, The application also discloses a lower support structure with a special-shaped bent cap, an upper beam structure and a method for constructing the lower support structure with the special-shaped bent cap.

6. A method of constructing a bridge according to claim 5, wherein, The application discloses a method for constructing the lower support structure with the special-shaped bent cap. S1, precasting an upper beam structure; S2, constructing a bridge pier (2); S3, erecting a support and installing a formwork on the bridge pier (2) for constructing the first support beam body (1) and the second force transmission beam body (5), binding steel bars in the first support beam body (1) and the second force transmission beam body (5), pouring concrete, curing and demolding to obtain the first support beam body (1) and the second force transmission beam body (5); S4, arranging a support (7) on the second force transmission beam body (5) and erecting the upper beam structure, thereby completing the construction.

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