Prefabricated assembly type reinforced concrete bridge structure and construction method

Abstract

The invention provides a prefabricated assembly type reinforced concrete bridge structure and a construction method, and relates to the technical field of assembly type bridges. The upper ends and the lower ends of the stand columns are connected, the lowermost stand column is fixedly connected with the base, the uppermost stand column is connected with the connecting column, and the top end of the connecting column is connected with the bridge. A corrugated pipe is embedded in the stand column, a plurality of transverse rods are fixed to the bottom of the corrugated pipe, a plurality of steel bars are fixed to the transverse rods at intervals, the steel bars upwards stretch out of the stand column, a bottom groove is formed in the bottom of the stand column, an opening of the bottom groove faces downwards, and a first grouting hole and a second grouting hole which are used for grouting are formed in the side face of the stand column. The second grouting hole is communicated with the top of the bottom groove; positioning plates are arranged at the four corners of the bottom face of each stand column, positioning grooves are formed in the top faces of the stand columns, and bolts are further arranged. The problems that when a plurality of pier columns are spliced, the overall structural strength and stability are poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled bridges, and in particular to a prefabricated assembled reinforced concrete bridge structure and a construction method. Background Art

[0002] Prefabricated bridges are bridge structures in which the main components of the upper and lower structures of the bridge are prefabricated in factories or prefabrication yards, and then the bridge components are transported to the construction site and assembled on site to realize the bridge construction. Prefabricated bridges are widely used in the process of bridge construction because of their high degree of production standardization, fast and convenient on-site installation, and reduced impact on road traffic in the surrounding environment.

[0003] A pier is a lower load-bearing object used to support the upper structure in civil engineering. In the existing bridge construction process, most of the piers are prefabricated and spliced ​​structures. They are prefabricated in the factory and then assembled on the construction site, which can effectively improve the construction efficiency. However, when multiple piers are spliced ​​together, their overall structural strength and stability are poor. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a prefabricated reinforced concrete bridge structure and a construction method, which solves the problem of poor overall structural strength and stability caused by splicing multiple piers.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

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

[0007] There are a plurality of columns, the upper and lower ends of which are connected, the column at the bottom is fixedly connected to the base, the column at the top is connected to the connecting column, and the top of the connecting column is connected to the bridge frame;

[0008] A corrugated pipe is pre-embedded on the column, a plurality of cross bars are horizontally fixed at the bottom of the corrugated pipe, a plurality of first steel bars are fixed on the cross bars at intervals along the length direction of the cross bars, the first steel bars extend upward out of the column, a bottom groove for the first steel bars to extend into is provided at the bottom of the column, the bottom groove opens downward, a first grouting hole and a second grouting hole for grouting are provided on the side of the column, the first grouting hole is communicated with the inside of the corrugated pipe, and the second grouting hole is communicated with the top of the bottom groove;

[0009] Positioning plates are arranged at the four corners of the bottom surface of the column, and the top surface of the column is provided with a positioning groove for the positioning plate to extend into, and a bolt is also provided to fix the positioning plate in the positioning groove.

[0010] Preferably, a fixing groove for the first steel bar to extend into is provided at the bottom of the connecting column, and a third grouting hole connected to the top of the fixing groove is provided on the side. Fixing plates cooperating with the positioning groove are also provided at the four corners of the bottom surface of the connecting column. The fixing plate extends into the positioning groove on the top surface of the column connected thereto and is fixed by bolts.

[0011] Preferably, a connecting block is provided at the bottom of the bridge frame, a connecting groove for the connecting block to be inserted into is provided at the top of the connecting column, a plurality of second steel bars are connected to the bottom of the connecting block, a long hole matching the second steel bars is provided at the bottom of the connecting groove, and tension bolts are also provided, and the connecting block is fixed in the connecting groove by the tension bolts.

[0012] Preferably, the positioning plate comprises a left connecting plate and a right connecting plate, the angle between the left connecting plate and the right connecting plate is 90°, and the left connecting plate and the right connecting plate are integrally formed.

[0013] Preferably, four bellows are provided.

[0014] Preferably, an inverted trapezoidal plate is provided at the lower portion of the bridge frame, and the connecting block is fixed at the bottom of the inverted trapezoidal plate.

[0015] Preferably, two tension bolts are provided.

[0016] A construction method, the prefabricated reinforced concrete bridge structure as described above, comprises the following steps:

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

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

[0019] S3: placing 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 fixed by bolts, grouting is performed after fixing, and the above steps of connecting another column to the column are repeated;

[0020] S4: Fix the connecting column to the top of the uppermost column;

[0021] S5: The bridge frame and the connecting column are fixed.

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

[0023] When connecting between columns, the steel bars arranged on the column extend into the bottom groove of the column connected to it above, and grouting is injected into the corrugated pipe through the first grouting hole. A positioning plate is provided, and the positioning plate extends into the positioning groove of the column connected to it below. The positioning plate is then fixed in the positioning groove by bolts, thereby connecting the two columns and ensuring their structural strength and stability.

[0024] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0029] Figure 5 It is a top view schematic diagram of a column of the present invention;

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

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

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

[0033] In the above drawings: 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. bridge; 41. connecting block; 42. second steel bar; 43. tension bolt; 5. corrugated pipe; 61. cross bar; 62. first steel bar; 7. positioning plate. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the technical solutions in the present invention are further described below in conjunction with the accompanying drawings and embodiments.

[0035] See also Figures 1 to 8As shown, a prefabricated reinforced concrete bridge structure includes: a base 1, columns 2, connecting columns 3 and a bridge frame 4; the columns 2 are provided with a plurality of columns, the upper and lower ends of the plurality of columns 2 are connected, the column 2 located at the bottom is fixedly connected to the base 1, the column 2 located at the top is connected to the connecting column 3, and the top of the connecting column 3 is connected to the bridge frame 4; a corrugated pipe 5 is pre-embedded on the column 2, a plurality of cross bars 61 are horizontally fixed to the bottom of the corrugated pipe 5, a plurality of first steel bars 62 are fixed to the cross bars 61 at intervals along the length direction of the cross bars 61, and the first steel bars 62 extend upward Outside the column 2, a bottom groove 21 is provided at the bottom of the column 2 for the first steel bar 62 to extend into, and 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 is connected to the inside of the corrugated pipe 5, and 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, and a positioning groove 24 is provided on the top surface of the column 2 for the positioning plate 7 to extend into, and bolts are also provided to fix the positioning plate 7 in the positioning groove 24.

[0036] The base 1 is provided to increase the contact surface with the ground, and the number of the columns 2 can be selected according to the height requirements of the bridge. The connecting column 3 is used to connect the column 2 and the bridge frame 4, and the bridge frame 4 is used to connect the bridge deck and other structures of the bridge; since the positioning plate 7 is provided at the bottom of the column 2, a base groove matched with the positioning plate 7 is provided in the base 1, which can accurately position the column 2, and a plurality of base steel bars are pre-embedded on the base 1, and the base steel bars extend into the bottom groove 21 at the bottom of the column 2, and concrete is injected into the bottom groove 21 through the second grouting hole 23, so as to fix the lower column 2 to the base 1; when connecting between the columns 2, the base 1 A first steel bar 62 arranged on the column 2 extends into the bottom groove 21 of the column 2 connected thereto above, and grouting is injected into the corrugated pipe 5 through the first grouting hole 22, and grouting is injected into the bottom groove 21 through the second grouting hole 23, that is, concrete is injected into the corrugated pipe 5 and the bottom groove 21; and a positioning plate 7 is provided, the positioning plate 7 extends into the positioning groove 24 of the column 2 connected thereto below, a through hole is provided on the positioning plate 7, bolts pass through the through hole and are threadedly fixed in the column 2, and the positioning plate 7 is fixed in the positioning groove 24 by providing a plurality of bolts, thereby connecting the two columns 2, so that the structural strength and stability are guaranteed.

[0037] Furthermore, if 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 steel bar 62 to extend into, and a third grouting hole 33 connected to the top of the fixing groove 32 is provided on the side. The four corners of the bottom surface of the connecting column 3 are also provided with fixing plates 34 that cooperate with the positioning groove 24. The fixing plates 34 extend into the positioning groove 24 on the top surface of the column 2 connected thereto and are fixed by bolts. When the uppermost column 2 is connected to the connecting column 3, the first steel 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, and the fixing plate 34 also extends into the positioning groove 24. The fixing plate 34 is also provided with a plurality of through holes, and the bolts pass through the through holes and are threadedly fixed in the column 2.

[0038] Furthermore, if Figure 2 and Figure 8 As shown, a connection block 41 is provided at the bottom of the bridge frame 4, a connection groove 31 is provided at the top of the connection column 3 for the connection block 41 to extend into, a plurality of second steel bars 42 are connected to the bottom of the connection block 41, a long hole matching the second steel bars 42 is provided at the bottom of the connection groove 31, and a tension bolt 43 is also provided, and the connection block 41 is fixed in the connection groove 31 by the tension bolt 43. When the bridge frame 4 is connected to the connection column 3, the second steel bars 42 extend into the long hole at the bottom of the connection groove 31, the connection block 41 is placed in the connection groove 31, the tension bolt 43 penetrates from one side of the connection column 3, then passes through the connection block 41, and penetrates from the other side of the connection column 3, and the connection block 41 is fixed in the connection groove 31 by the tension bolt 43, so that the bridge frame 4 is fixedly connected to the connection column 3.

[0039] Furthermore, if Figure 5 and Figure 6 As shown, the positioning plate 7 includes a left connecting plate and a right connecting plate, the angle between the left connecting plate and the right connecting plate is 90°, the left connecting plate and the right connecting plate are integrally formed, the positioning groove 24 is also set to a shape that matches the positioning plate 7, and the lengths of the left connecting plate and the right connecting plate are not equal, so while playing a connecting role, it also plays a limiting role.

[0040] Furthermore, if Figure 5 As shown, in order to improve the connection strength, four bellows 5 are provided. Four first grouting holes 22 are also provided, and the four first grouting holes 22 are respectively provided corresponding to the four bellows 5 .

[0041] Furthermore, if Figure 2 As shown, in order to improve the supporting stability, an inverted trapezoidal plate is provided at the lower part of the bridge frame 4, and the connecting block 41 is fixed at the bottom of the inverted trapezoidal plate.

[0042] Furthermore, if Figure 2As shown, in order to improve the connection reliability, two tension bolts 43 are provided.

[0043] A construction method, using the above-mentioned prefabricated reinforced concrete bridge structure, comprises the following steps:

[0044] S1: Prefabricate the base 1, columns 2, connecting columns 3 and bridge frames in the factory and transport them to the construction site;

[0045] S2: Fix a 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 them with bolts, perform grouting after fixing, and repeat the above steps to connect another column 2 to the column 2;

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

[0048] S5: The bridge frame 4 and the connecting column 3 are fixed.

[0049] Specifically, a base groove that cooperates with the positioning plate 7 is provided in the base 1, and a plurality of base steel bars are pre-embedded on the base 1. When connected, the base steel bar extends into the bottom groove 21 at the bottom of the column 2, and concrete is injected therein through the second grouting hole 23 provided on the lower column 2, so as to fix the lower column 2 to the base 1; when the two columns 2 are fixed, 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 by bolts, and grouting is performed through the first grouting hole 22 provided on the lower column 2 and the second grouting hole 23 provided on the upper column 2, and the fixing of the two columns 2 is repeated many times. Operation: After all the columns 2 are connected, the first steel bar 62 of the uppermost column 2 is inserted into the fixing groove 32 of the connecting column 3, and then concrete is injected into the fixing groove 32 through the third grouting hole 33, and the fixing plate 34 is also inserted into the positioning groove 24 of the uppermost column 2. The fixing plate 34 is also provided with a plurality of through holes, and the bolts pass through the through holes and are threadedly fixed in the column 2; finally, the second steel bar 42 on the connecting block 41 is inserted into the long hole at the bottom of the connecting groove 31, the connecting block 41 is placed in the connecting groove 31, the tension bolt 43 is inserted from one side of the connecting column 3, and then passes through the connecting block 41 and comes out from the other side of the connecting column 3, and the connecting block 41 is fixed in the connecting groove 31 by the tension bolt 43, so that the bridge frame 4 and the connecting column 3 are fixedly connected.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A prefabricated reinforced concrete bridge structure, characterized in that: include: Base (1), columns (2), connecting columns (3) and bridge (4); A plurality of columns (2) are provided, and the upper and lower ends of the plurality of columns (2) are connected, the column (2) located at the bottom is fixedly connected to the base (1), and the column (2) located at the top is connected to the connecting column (3), and the top end of the connecting column (3) is connected to the bridge frame (4); A corrugated pipe (5) is pre-buried on the column (2); a plurality of cross bars (61) are horizontally fixed to the bottom of the corrugated pipe (5); a plurality of first steel bars (62) are fixed to the cross bars (61) at intervals along the length direction of the cross bars (61); the first steel bars (62) extend upwardly out of the column (2); a bottom groove (21) is provided at the bottom of the column (2) for the first steel bars (62) to extend into; the bottom groove (21) opens downward; a first grouting hole (22) and a second grouting hole (23) for grouting are provided on the side of the column (2); the first grouting hole (22) is communicated with the inside of the corrugated pipe (5); and the second grouting hole (23) is communicated with the top of the bottom groove (21); Positioning plates (7) are arranged at the four corners of the bottom surface of the column (2), and the top surface of the column (2) is provided with a positioning groove (24) for the positioning plate (7) to extend into, and a bolt is also provided to fix the positioning plate (7) in the positioning groove (24).

2. A prefabricated reinforced concrete bridge structure as claimed in claim 1, characterized in that: The bottom of the connecting column (3) is provided with a fixing groove (32) for the first steel bar (62) to extend into, and the side is provided with a third grouting hole (33) connected to the top of the fixing groove (32). The four corners of the bottom surface of the connecting column (3) are also provided with fixing plates (34) that cooperate with the positioning groove (24). The fixing plate (34) extends into the positioning groove (24) on the top surface of the column (2) connected thereto and is fixed by bolts.

3. The prefabricated reinforced concrete bridge structure according to claim 1, characterized in that: A connecting block (41) is arranged at the bottom of the bridge frame (4), a connecting groove (31) is arranged at the top of the connecting column (3) for the connecting block (41) to extend into, a plurality of second steel bars (42) are connected to the bottom of the connecting block (41), a long hole matching the second steel bars (42) is arranged at the bottom of the connecting groove (31), and a tension bolt (43) is also arranged, and the connecting block (41) is fixed in the connecting groove (31) by the tension bolt (43).

4. The prefabricated reinforced concrete bridge structure according to claim 1, characterized in that: The positioning plate (7) comprises a left connecting plate and a right connecting plate, the angle between the left connecting plate and the right connecting plate is 90°, and the left connecting plate and the right connecting plate are integrally formed.

5. The prefabricated reinforced concrete bridge structure according to claim 1, characterized in that: Four bellows (5) are provided.

6. The prefabricated reinforced concrete bridge structure according to claim 3, characterized in that: An inverted trapezoidal plate is provided at the lower part of the bridge frame (4), and the connecting block (41) is fixed at the bottom of the inverted trapezoidal plate.

7. The prefabricated reinforced concrete bridge structure according to claim 1, characterized in that: Two tension bolts (43) are provided.

8. A construction method, using any one of the prefabricated reinforced concrete bridge structures as claimed in claims 1 to 7, characterized in that: The following steps are involved: S1: prefabricate the base (1), columns (2), connecting columns (3) and bridge in the factory and transport them to the construction site; S2: Fixing a column (2) to the base (1); S3: placing 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 fixing them with bolts, and then grouting, and repeating the above steps to connect another column (2) to the column (2); S4: Fixing the connecting column (3) on the top of the uppermost column (2); S5: The bridge frame (4) and the connecting column (3) are fixed.

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