A precast reinforced concrete bridge structure and construction method

Abstract

This invention provides a prefabricated reinforced concrete bridge structure and construction method, relating to the field of prefabricated bridge technology. The structure includes: a base, columns, connecting columns, and a bridge frame; several columns are connected at their upper and lower ends, with the lowest column fixedly connected to the base and the highest column connected to the connecting column, the top of which is connected to the bridge frame; corrugated pipes are pre-embedded in the columns, with several horizontal bars fixed to the bottom of the corrugated pipes, and several reinforcing bars fixed at intervals on the horizontal bars, extending upwards beyond the columns; a bottom groove is provided at the bottom of the columns, with the groove opening downwards; a first grouting hole and a second grouting hole are provided on the side of the columns for grouting, the first grouting hole communicating with the inside of the corrugated pipe, and the second grouting hole communicating with the top of the bottom groove; positioning plates are provided at the four corners of the bottom surface of the columns, and positioning grooves are provided on the top surface of the columns, along with bolts. This invention solves the problem of poor overall structural strength and stability when multiple piers are spliced ​​together.

Description

Technical Field

[0001] This invention relates to the field of prefabricated bridge technology, and in particular to a prefabricated reinforced concrete bridge structure and construction method. Background Technology

[0002] Precast bridges are a type of bridge structure where the main components of the superstructure and substructure are prefabricated in a factory or prefabrication yard, and then transported to the construction site for assembly. Precast bridges are widely used in bridge construction due to their high degree of standardization in production, rapid and convenient on-site installation, and reduced impact on the surrounding environment and road traffic.

[0003] Piers are the lower load-bearing structures used in civil engineering to support the superstructure. In the current bridge construction process, most piers adopt a prefabricated splicing structure, which is prefabricated in the factory and then assembled on the construction site, which can effectively improve construction efficiency. However, splicing multiple piers together results in poor overall structural strength and stability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a prefabricated reinforced concrete bridge structure and construction method, which solves the problem of poor overall structural strength and stability when multiple piers are spliced ​​together.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A prefabricated reinforced concrete bridge structure includes: a base, columns, connecting columns, and a bridge frame;

[0007] The column is provided in several parts, and the upper and lower ends of the column are connected. The bottom column is fixedly connected to the base, and the top column is connected to the connecting column. The top of the connecting column is connected to the cable tray.

[0008] The column is pre-embedded with a corrugated pipe, and several horizontal bars are fixed horizontally at the bottom of the corrugated pipe. Several first reinforcing bars are fixed at intervals along the length of the horizontal bars. The first reinforcing bars extend upward outside the column. The bottom of the column is provided with a bottom groove for the first reinforcing bars to enter. The bottom groove opens downward. The side of the column is provided with a first grouting hole and a second grouting hole for grouting. The first grouting hole communicates with the inside of the corrugated pipe, and the second grouting hole communicates with the top of the bottom groove.

[0009] Positioning plates are provided at the four corners of the bottom surface of the column, and positioning grooves are provided on the top surface of the column for the positioning plates to extend into. Bolts are also provided to fix the positioning plates in the positioning grooves.

[0010] Preferably, the bottom of the connecting column is provided with a fixing groove for the first reinforcing bar to extend into, and a third grouting hole communicating with the top of the fixing groove is provided on the side. The four corners of the bottom surface of the connecting column are also provided with fixing plates that cooperate with the positioning groove. The fixing plates extend into the positioning groove on the top surface of the column connected to them and are fixed by bolts.

[0011] Preferably, the bottom of the cable tray is provided with a connecting block, the top of the connecting column is provided with a connecting groove into which the connecting block can extend, the bottom of the connecting block is connected with a plurality of second reinforcing bars, the bottom of the connecting groove is provided with an elongated hole matching the second reinforcing bars, and a tie bolt is also provided, and the connecting block is fixed in the connecting groove by the tie bolt.

[0012] Preferably, the positioning plate includes a left connecting plate and a right connecting plate, with an included angle of 90° between the left connecting plate and the right connecting plate, and the left connecting plate and the right connecting plate are integrally formed.

[0013] Preferably, four bellows are provided.

[0014] Preferably, the lower part of the cable tray is provided with an inverted trapezoidal plate, and the connecting block is fixed to the bottom of the inverted trapezoidal plate.

[0015] Preferably, two tie bolts are provided.

[0016] A construction method for a precast reinforced concrete bridge structure as described above includes the following steps:

[0017] S1: Prefabricate the base, columns, connecting columns, and cable trays in the factory and transport them to the construction site;

[0018] S2: Fix a column to the base;

[0019] S3: Place another column on the column connected to the base, so that the first steel bar on the lower column extends into the bottom groove of the upper column, and the positioning plate at the bottom of the upper column extends into the positioning groove of the lower column, and fix it with bolts. After fixing, grouting is performed. Repeat the above steps to connect the other column to the column.

[0020] S4: Secure the connecting post to the top of the uppermost post;

[0021] S5: Secure the cable tray to the connecting column.

[0022] The present invention has the following beneficial effects:

[0023] When connecting the columns, the steel bars on the columns extend into the bottom groove of the upper column to which they are connected, and grout is injected into the corrugated pipe through the first grouting hole. A positioning plate is also provided, which extends into the positioning groove of the lower column to which it is connected. The positioning plate is then fixed in the positioning groove with bolts, thereby connecting the two columns and ensuring their structural strength and stability.

[0024] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the column structure of the present invention;

[0028] Figure 4 This is a schematic cross-sectional view of the column of the present invention;

[0029] Figure 5 This is a top view of the column of the present invention;

[0030] Figure 6 This is a schematic diagram of the vertical plate connection of the present invention;

[0031] Figure 7 This is a schematic diagram of the connecting column structure of the present invention;

[0032] Figure 8 This is a cross-sectional schematic diagram of the connecting column structure of the present invention.

[0033] In the above attached figures: 1. Base; 2. Column; 21. Bottom groove; 22. First grouting hole; 23. Second grouting hole; 24. Positioning groove; 3. Connecting column; 31. Connecting groove; 32. Fixing groove; 33. Third grouting hole; 34. Fixing plate; 4. Cable tray; 41. Connecting block; 42. Second reinforcing bar; 43. Tie bolt; 5. Corrugated pipe; 61. Crossbar; 62. First reinforcing bar; 7. Positioning plate. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of the present invention clearer and easier to understand, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] Please see Figures 1 to 8As shown, a precast reinforced concrete bridge structure includes: a base 1, columns 2, connecting columns 3, and a bridge frame 4; several columns 2 are provided, with their upper and lower ends connected together. The lowest column 2 is fixedly connected to the base 1, and the highest column 2 is connected to the connecting columns 3. The top of the connecting columns 3 is connected to the bridge frame 4; corrugated pipes 5 are pre-embedded in the columns 2, and several horizontal bars 61 are horizontally fixed to the bottom of the corrugated pipes 5. Several first reinforcing bars 62 are fixed at intervals along the length of the horizontal bars 61, and the first reinforcing bars 62 extend upwards. Outside the column 2, the bottom of the column 2 is provided with a bottom groove 21 for the first reinforcing bar 62 to extend into. The bottom groove 21 opens downward. The side of the column 2 is provided with a first grouting hole 22 and a second grouting hole 23 for grouting. The first grouting hole 22 communicates with the inside of the corrugated pipe 5, and the second grouting hole 23 communicates with the top of the bottom groove 21. Positioning plates 7 are provided at the four corners of the bottom surface of the column 2. The top surface of the column 2 is provided with a positioning groove 24 into which the positioning plates 7 can extend. Bolts are also provided to fix the positioning plates 7 in the positioning groove 24.

[0036] The base 1 is designed to increase the contact surface with the ground. The number of columns 2 can be selected according to the height requirements of the bridge. Connecting columns 3 are used to connect columns 2 to the bridge frame 4. The bridge frame 4 is used to connect the bridge deck and other structures. Since the bottom of the column 2 is equipped with a positioning plate 7, the base 1 is equipped with a base groove that matches the positioning plate 7, which can accurately position the column 2. Several base steel bars are pre-embedded in the base 1. The base steel bars extend into the bottom groove 21 at the bottom of the column 2. Concrete is injected into the groove through the second grouting hole 23, thereby fixing the column 2 below to the base 1. When connecting the columns 2, the... The first reinforcing bar 62 installed on column 2 extends into the bottom groove 21 of the column 2 connected above it, and grout is injected into the corrugated pipe 5 through the first grouting hole 22 and the second grouting hole 23, that is, concrete is injected into the corrugated pipe 5 and the bottom groove 21. A positioning plate 7 is also installed, which extends into the positioning groove 24 of the column 2 connected below it. The positioning plate 7 has through holes, and bolts pass through the through holes and are threaded and fixed in the column 2. By setting multiple bolts, the positioning plate 7 is fixed in the positioning groove 24, thereby connecting the two columns 2 and ensuring their structural strength and stability.

[0037] Furthermore, such as Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, the bottom of the connecting column 3 is provided with a fixing groove 32 for the first reinforcing bar 62 to extend into. A third grouting hole 33 communicating with the top of the fixing groove 32 is provided on the side. Fixing plates 34 that cooperate with the positioning groove 24 are also provided at the four corners of the bottom surface of the connecting column 3. The fixing plates 34 extend into the positioning groove 24 on the top surface of the connected column 2 and are fixed with bolts. When the uppermost column 2 is connected to the connecting column 3, the first reinforcing bar 62 of the column 2 extends into the fixing groove 32, and then concrete is injected into the fixing groove 32 through the third grouting hole 33. The fixing plate 34 also extends into the positioning groove 24. Several through holes are also provided on the fixing plate 34, through which bolts pass and are threaded into the column 2.

[0038] Furthermore, such as Figure 2 and Figure 8 As shown, the cable tray 4 has a connecting block 41 at its bottom, and the connecting column 3 has a connecting groove 31 at its top into which the connecting block 41 can extend. Several second reinforcing bars 42 are connected to the bottom of the connecting block 41. The bottom of the connecting groove 31 has elongated holes matching the second reinforcing bars 42, and also includes tie bolts 43. The connecting block 41 is fixed within the connecting groove 31 by the tie bolts 43. When the cable tray 4 is connected to the connecting column 3, the second reinforcing bars 42 extend into the elongated holes at the bottom of the connecting groove 31, the connecting block 41 is placed within the connecting groove 31, and the tie bolts 43 are inserted from one side of the connecting column 3, then pass through the connecting block 41, and exit from the other side of the connecting column 3. The tie bolts 43 fix the connecting block 41 within the connecting groove 31, thereby fixing the cable tray 4 to the connecting column 3.

[0039] Furthermore, such as Figure 5 and Figure 6 As shown, the positioning plate 7 includes a left connecting plate and a right connecting plate, with an included angle of 90° between the left connecting plate and the right connecting plate. The left connecting plate and the right connecting plate are integrally formed, and the positioning groove 24 is also set in a shape that matches the positioning plate 7. The lengths of the left connecting plate and the right connecting plate are not equal, which serves as both a connection and a limiting function.

[0040] Furthermore, such as Figure 5 As shown, to improve connection strength, four corrugated pipes 5 are provided. Four first grouting holes 22 are also provided, with each of the four first grouting holes 22 corresponding to one of the four corrugated pipes 5.

[0041] Furthermore, such as Figure 2 As shown, in order to improve the support stability, the lower part of the cable tray 4 is provided with an inverted trapezoidal plate, and the connecting block 41 is fixed to the bottom of the inverted trapezoidal plate.

[0042] Furthermore, such as Figure 2As shown, two tie bolts 43 are provided to improve connection reliability.

[0043] A construction method using the precast reinforced concrete bridge structure described above includes the following steps:

[0044] S1: Prefabricate the base 1, column 2, connecting column 3 and cable tray in the factory and transport them to the construction site;

[0045] S2: Fix one column 2 to the base 1;

[0046] S3: Place another column 2 on the column 2 connected to the base 1, so that the first steel bar 62 on the lower column 2 extends into the bottom groove 21 of the upper column 2, and the positioning plate 7 at the bottom of the upper column 2 extends into the positioning groove 24 of the lower column 2, and fix it with bolts. After fixing, grouting is performed. Repeat the above steps to connect the other column 2 to the column 2.

[0047] S4: Fix the connecting column 3 to the top of the uppermost column 2;

[0048] S5: The cable tray 4 is fixed to the connecting column 3.

[0049] Specifically, the base 1 has a base groove that mates with the positioning plate 7, and several base steel bars are pre-embedded in the base 1. During connection, the base steel bars extend into the bottom groove 21 at the bottom of the column 2, and concrete is injected into it through the second grouting hole 23 on the lower column 2, thereby fixing the lower column 2 to the base 1. When fixing the two columns 2, the first steel bar 62 on the lower column 2 extends into the bottom groove 21 of the upper column 2, and the positioning plate 7 at the bottom of the upper column 2 extends into the positioning groove 24 of the lower column 2, and is fixed with bolts. Grouting is performed through the first grouting hole 22 on the lower column 2 and the second grouting hole 23 on the upper column 2. The two columns 2 are fixed repeatedly. Operation: After all columns 2 are connected, the first reinforcing bar 62 of the uppermost column 2 extends into the fixing groove 32 of the connecting column 3. Then, concrete is injected into the fixing groove 32 through the third grouting hole 33, and the fixing plate 34 also extends into the positioning groove 24 of the uppermost column 2. The fixing plate 34 is also provided with several through holes. Bolts pass through the through holes and are threaded and fixed in the column 2. Finally, the second reinforcing bar 42 on the connecting block 41 extends into the elongated hole at the bottom of the connecting groove 31. The connecting block 41 is placed in the connecting groove 31. The tie bolt 43 is inserted from one side of the connecting column 3, then passes through the connecting block 41, and exits from the other side of the connecting column 3. The tie bolt 43 fixes the connecting block 41 in the connecting groove 31, thereby fixing the cable tray 4 to the connecting column 3.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A precast assembled reinforced concrete bridge structure, characterized in that, include: Base (1), column (2), connecting column (3) and cable tray (4); The column (2) is provided in several parts, and the upper and lower ends of the column (2) are connected together. The column (2) at the bottom is fixedly connected to the base (1), and the column (2) at the top is connected to the connecting column (3). The top of the connecting column (3) is connected to the cable tray (4). A corrugated pipe (5) is pre-embedded on the column (2). Several horizontal bars (61) are fixed horizontally at the bottom of the corrugated pipe (5). Several first steel bars (62) are fixed at intervals along the length of the horizontal bars (61). The first steel bars (62) extend upwards out of the column (2). The bottom of the column (2) is provided with a bottom groove (21) for the first steel bars (62) to extend into. The bottom groove (21) opens downwards. The side of the column (2) is provided with a first grouting hole (22) and a second grouting hole (23) for grouting. The first grouting hole (22) is connected to the inside of the corrugated pipe (5). The second grouting hole (23) is connected to the top of the bottom groove (21). Positioning plates (7) are provided at the four corners of the bottom surface of the column (2). The top surface of the column (2) is provided with positioning grooves (24) into which the positioning plates (7) can be inserted. Bolts are also provided to fix the positioning plates (7) in the positioning grooves (24). The cable tray (4) is provided with a connecting block (41) at the bottom, and the connecting column (3) is provided with a connecting groove (31) at the top, into which the connecting block (41) can extend. The bottom of the connecting block (41) is connected with a number of second reinforcing bars (42). The bottom of the connecting groove (31) is provided with an elongated hole that matches the second reinforcing bars (42), and is also provided with tie bolts (43). The connecting block (41) is fixed in the connecting groove (31) by the tie bolts (43).

2. The precast assembled reinforced concrete bridge structure as described in claim 1, characterized in that, The bottom of the connecting column (3) is provided with a fixing groove (32) into which the first reinforcing bar (62) extends. A third grouting hole (33) communicating with the top of the fixing groove (32) is provided on the side. Fixing plates (34) that cooperate with the positioning groove (24) are also provided at the four corners of the bottom surface of the connecting column (3). The fixing plates (34) extend into the positioning groove (24) on the top surface of the column (2) connected to them and are fixed by bolts.

3. A prefabricated reinforced concrete bridge structure as described in claim 1, characterized in that, The positioning plate (7) includes a left connecting plate and a right connecting plate, with an included angle of 90° between the left connecting plate and the right connecting plate, and the left connecting plate and the right connecting plate are integrally formed.

4. A precast assembled reinforced concrete bridge structure as described in claim 1, characterized in that, The bellows (5) are provided in four parts.

5. A precast assembled reinforced concrete bridge structure as described in claim 1, characterized in that, The lower part of the cable tray (4) is provided with an inverted trapezoidal plate, and the connecting block (41) is fixed to the bottom of the inverted trapezoidal plate.

6. A precast assembled reinforced concrete bridge structure as described in claim 1, characterized in that, Two tie bolts (43) are provided.

7. A construction method employing the precast assembled reinforced concrete bridge structure as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1: The base (1), column (2), connecting column (3) and cable tray are prefabricated in the factory and transported to the construction site; S2: Fix one column (2) to the base (1); S3: Place another column (2) on the column (2) connected to the base (1), so that the first steel bar (62) on the lower column (2) extends into the bottom groove (21) of the upper column (2), and so that the positioning plate (7) at the bottom of the upper column (2) extends into the positioning groove (24) of the lower column (2), and fix it with bolts. After fixing, grouting is performed. Repeat the above steps of connecting the other column (2) to the column (2); S4: Fix the connecting column (3) to the top of the uppermost column (2); S5: The cable tray (4) is fixed to the connecting column (3).

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