CN116200999A

CN116200999A - Bridge pavement area comprising electric power pipeline and construction method thereof

Info

Publication number: CN116200999A
Application number: CN202310092553.3A
Authority: CN
Inventors: 张锋; 胡详文; 杜利超; 李冰; 刘鑫; 刘宾; 张来丰; 洪祥; 刘海; 杜千; 刘琦
Original assignee: Tianjin Municipal Engineering Design and Research Institute
Current assignee: Tianjin Municipal Engineering Design and Research Institute
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-06-02

Abstract

The invention discloses a pavement area of a bridge comprising an electric pipeline and a construction method thereof, wherein the pavement area of the bridge comprises a second area arranged in the middle, a back wall of the bridge and a first area positioned at the bridge head; the top heights of the first area and the second area are equal; the first zone includes a cable well; in the second region, each bridge divides the line department to set up an expansion joint, and a plurality of first cable ducts are fixed to be laid in bridge pavement regional inside to extend to the cable shaft department in first region, first cable duct is used for holding the cable, and the second cable duct is located expansion joint department, the corresponding tip of every two relative first cable ducts all cup joints a second cable duct, and two tip of second cable duct are fixed only one end, ensure first cable duct and second cable duct telescopic connection. The invention can connect the first cable duct and the second cable duct in a telescopic way, meets the telescopic requirement of the bridge, does not change road route, and reduces construction difficulty.

Description

Bridge pavement area comprising electric power pipeline and construction method thereof

Technical Field

The invention belongs to the field of building construction, and particularly relates to a bridge pavement area comprising an electric pipeline and a construction method thereof.

Background

At present, the construction of an electric power calandria is synchronously considered in the municipal road construction, at present, a bridge is adopted for passing through a bridge by adopting a pull pipe under the bridge, a deep well is required to be arranged in the river channel, the depth of a part of cable well can reach about 10m, and a deep foundation pit is required to be adopted for construction, so that the construction difficulty and the construction investment are increased; meanwhile, the power pipelines need to deviate from the original design routing position, the number of the power pipelines and the cable well size are large, and in order to meet the power turning radius requirement, larger plane space is needed when deviating from the routing, and the land-marking scale needs to be increased.

Therefore, the method for passing the bridge through the electric pipeline is required, which greatly saves the use of the plane space and reduces the construction difficulty.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a pavement area of a bridge comprising an electric pipeline and a construction method thereof. The construction method does not change the lighting route, does not need to arrange an electric deep well, greatly saves the use of plane space, reduces the construction difficulty and has considerable economic benefit.

The bridge pavement area comprises a second area which is arranged in the middle, two sides of the second area are respectively provided with a bridge back wall, and the other side of each bridge back wall is provided with a first area positioned at the bridge head; the top heights of the first area and the second area are equal; the first zone includes a cable well; in the second area, each bridge is provided with an expansion joint at a cross line, and two adjacent expansion joints are separated by 30-40 m; the bridge pavement is characterized in that a plurality of first cable ducts are fixedly paved in the bridge pavement area and extend to the cable well of the first area, the first cable ducts are used for accommodating cables, the second cable ducts are located at the expansion joints, the corresponding end parts of every two opposite first cable ducts are sleeved with one second cable duct, only one end part of each of the two end parts of each second cable duct is fixed, and the first cable duct and the second cable duct are guaranteed to be in telescopic connection.

Further, the first cable pipeline and the second cable pipeline are laid under the pavement plate, a first concrete filling area and a second concrete filling area are arranged between the first cable pipeline and the pavement plate and used for filling concrete, the first concrete filling area and the second concrete filling area are respectively located at two sides of the expansion joint, the width of the first concrete filling area is equal to that of the second area, and the width of the second concrete filling area is smaller than that of the second area by 300-400mm.

Further, the diameter of the second cable duct is 15mm larger than that of the first cable duct.

Further, the first area is located at the bridge head, and the cable well is arranged close to the bridge back wall.

The construction method of the bridge pavement area comprises the following steps:

step one: building a second area and a bridge back wall, determining the positions and the widths of expansion joints according to the branch crossing lines in a bridge construction drawing, and arranging one expansion joint at each bridge branch crossing line in the second area, wherein two adjacent expansion joints are separated by 30m;

step two: building a first area close to one side of each bridge back wall, wherein the first area is positioned at the bridge head and comprises a cable well; the top elevation of the first area is consistent with the elevation of the second area, and the width of the first area is consistent with the elevation of the second area;

step three: a plurality of first cable pipelines which are arranged side by side are respectively laid at the tops of the second area, the bridge back wall and part of the first area and are used for placing cables, the end parts of the first cable pipelines are respectively 100mm away from the side wall of the nearest expansion joint, one end part of the first cable pipeline closest to the bridge head is flush with the wall of the cable well, and a third cable pipeline is arranged on the wall of the cable well opposite to the cable well and is used for accessing the cables in the cable well; the opposite ends of each two opposite first cable ducts are sleeved with a second cable duct;

step four: casting concrete at the tops of the first cable duct and the second cable duct of the second area on one side of the expansion joint for fixing the first cable duct and the second cable duct; the other side of the expansion joint is only poured with a part of the first cable pipeline far away from the second cable pipeline from the end part of the expansion joint, so that the first cable pipeline and the second cable pipeline can be connected in a telescopic way;

and then paving a pavement slab at the top of the second area, wherein the top of the cable well in the first area is at least partially provided with an openable filling type cover plate, and the top standard heights of the first area, the bridge back wall and the second area are equal.

Further, the filling content of the filling type cover plate is consistent with the material of the top of the second area; the top of the other parts of the first area except the cable well is paved with the same material as the top of the second area.

Further, the two opposite first cable duct ends in the second cable duct keep the interval of expansion joint width +200 as expansion space.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

(1) The expansion joints of the bridge pavement area are connected by the sleeves, so that the first cable pipeline and the second cable pipeline can be connected in a telescopic manner, and the expansion requirement of the bridge is met;

(2) The pipeline route is not changed, and the first cable pipeline and the second cable pipeline are arranged below the pavement plate;

(3) The cable wells with the same height and width as the second area are arranged at the bridge head position, the heights of the calandria are changed, the construction difficulty is reduced, and considerable economic benefits are achieved.

Drawings

FIG. 1 is a schematic plan view of a pavement area of a bridge incorporating an electrical conduit according to the present invention;

FIG. 2 is a cross-sectional view of the pavement area A-A of FIG. 1;

fig. 3 is a partial schematic view of fig. 2 showing a cross-sectional view of the bridge back wall and the second area A-A.

In the figure:

1: first region 2: bridge back wall 3: second region

4: expansion joint 5: cable well 6: first cable duct

7: second cable duct 8: third cable duct 9: pavement on road

10: on-bridge walkway 11: cover plate 12: first concrete filled area

13: second concrete filled area

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings and specific embodiments, which are only illustrative of the present invention and are not intended to limit the present invention.

Fig. 1 shows a schematic plan view of a pavement area of a bridge comprising electric power conduits, the pavement plate at the top of which is not shown in the figure for clarity of illustration of the structure of the cable well. The bridge pavement area comprises a second area 3 which is arranged in the middle, two sides of the second area are respectively provided with a bridge back wall 2, and the other side of each bridge back wall 2 is provided with a first area 1 positioned at the bridge head. The second area is laid on top of a pavement slab as an on-bridge pavement 10. In the second area 3, an expansion joint 4 is arranged at each bridge crossover line, and two adjacent expansion joints 4 are separated by 30-40 m.

The first cable duct 6 and the second cable duct are laid in the area of the bridge pavement and are located under the pavement plate, namely, located in the second area 3, the bridge back wall 2 and extending to the cable well 5 of the first area, the first cable duct 6 is used for accommodating cables, the second cable duct 7 is located at each expansion joint 4 and is used for sleeving corresponding end parts of the two first cable ducts 6 which are oppositely arranged, and only one end part of the two end parts of the second cable duct 7 is fixed, so that the first cable duct 6 and the second cable duct 7 are guaranteed to be connected in a telescopic manner.

A first concrete filling area 12 and a second concrete filling area 13 are arranged between the first cable pipeline and the pavement plate and used for filling concrete, the first concrete filling area 12 and the second concrete filling area 13 are respectively positioned on two sides of the expansion joint 4, the width of the first concrete filling area 12 is equal to that of the second area 3, and the width of the second concrete filling area 13 is smaller than that of the second area 3 by 300mm.

A construction method of a pavement area including an electric power pipeline, comprising:

step one: building a main body part of a bridge pavement area, namely building a second area 3 and a bridge back wall 2, and determining the position and the width of an expansion joint 4 according to a bridge sub-span line in a bridge construction drawing, wherein the bridge sub-span line is the central line of the expansion joint; in the second area 3, an expansion joint 4 is arranged at each bridge crossing line, and two adjacent expansion joints 4 are separated by 30m;

step two: building a first area 1 at the bridge head part, wherein the first area 1 is arranged close to one side of each bridge back wall 2, and the first area 1 comprises a cable well 5 which plays roles of converting elevation and extending sidewalk; the top elevation of the first area 1 is consistent with the elevation of the second area 3, and the width of the first area is consistent with the width of the second area 3;

step three: and a plurality of first cable ducts 6 which are arranged side by side are respectively laid at the tops of the second area 3, the bridge back wall 2 and part of the first area 1, the diameter of each first cable duct 6 is 175mm and used for placing and protecting an electric power main power cable, the end parts of the first cable ducts 6 are respectively 100mm away from the side wall of the nearest expansion joint, one end part of each first cable duct 6 closest to the bridge head reaches the wall of the cable well 5, namely the pipe orifice of each first cable duct 6 is flush with the wall of the cable well 5, and a third cable duct 8 is arranged on the wall of the corresponding cable well 5 and used for connecting a cable in the cable well 5. A plurality of second cable ducts 7 with the diameter of 200mm are arranged at each expansion joint 4, and each two opposite ends of each two opposite first cable ducts 6 are sleeved with one second cable duct 7 for protecting the first cable duct 6 therein; the length of the second cable duct 7 is D+500mm (wherein D is the width of the expansion joint), namely the sleeving lengths of the two ends of the second cable duct 7 are 250mm, and the second cable duct 7 is perpendicular to the expansion joint 4; the end part of the first cable pipeline 6 penetrates into the second cable pipeline 150mm, and 100mm is reserved.

Step four: as shown in fig. 2-3, C20 concrete is poured on top of the first and

second conduits

6, 7 of the second region 3 on only one side of the expansion joint 4 to integrate the first and second conduits with the bridge body to form a first concrete filled region 12 as shown in fig. 3; while the other side of the central expansion joint 4 is not poured from the end part of the expansion joint 4 by 350mm, and only part of the first cable pipeline 6 is poured to form a second concrete filling area 13 shown in fig. 3, so that the first cable pipeline 6 and the second cable pipeline 7 are connected in a telescopic way;

laying a pavement slab on the top of the second area 3 to form an overhead pavement 10, wherein the top of the overhead pavement 10 is the same as the top standard height of the bridge back wall 2;

an openable filling type cover plate is arranged at the top of the cable shaft 5, and the filling content is consistent with the material of the top of the second area 3; the top laying content of other parts of the first area 1 except the cable well 5 is consistent with the material of the top of the second area 3; and the jacking heights of the first area 1, the bridge back wall 2 and the second area 3 are equal.

The technical key points are as follows:

(1) The first cable ducts 6 are fixedly arranged, and the two opposite ends of the first cable duct 6 in the second cable duct 7 are used as telescopic spaces at intervals of 200+D;

(2) The top elevation and the width of the cable shaft 5 are consistent with those of the second area 3;

(3) To facilitate cabling, the cover plate at the top of the cable pit 5 should be fully openable.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are within the scope of the present invention.

Claims

1. The bridge pavement area comprising the electric power pipeline is characterized by comprising a second area (3) which is arranged in the middle, wherein two sides of the second area are respectively provided with a bridge back wall (2) close to the second area, and the other side of each bridge back wall (2) is provided with a first area (1) positioned at the bridge head; the top heights of the first area (1) and the second area are equal; the first zone (1) comprises a cable well (5); in the second area (3), each bridge is provided with an expansion joint (4) at a crossing line, and two adjacent expansion joints (4) are separated by 30-40 m; the bridge pavement is characterized in that a plurality of first cable ducts (6) are fixedly paved in the bridge pavement area and extend to cable wells (5) in the first area, the first cable ducts (6) are used for accommodating cables, the second cable ducts (7) are located at the expansion joints (4), the corresponding end parts of every two opposite first cable ducts (6) are sleeved with one second cable duct (7), and two end parts of each second cable duct (7) are fixed only at one end part, so that the first cable ducts (6) are connected with the second cable ducts (7) in a telescopic manner.

2. The bridge pavement area according to claim 1, characterized in that the first and second cable conduits are laid under the pavement plate, a first concrete filling area (12) and a second concrete filling area (13) are arranged between the first and second cable conduits and the pavement plate for filling concrete, the first concrete filling area (12) and the second concrete filling area (13) are respectively located at two sides of the expansion joint (4), the width of the first concrete filling area (12) is equal to the width of the second area (3), and the width of the second concrete filling area (13) is smaller than the width of the second area (3) by 300-400mm.

3. The bridge pavement area according to claim 1, characterized in that the diameter of the second raceway (7) is 15mm larger than the diameter of the first raceway (6).

4. The bridge pavement area according to claim 1, characterized in that the first area (1) is located at the bridge head and the cable shaft (5) is arranged against the bridge back wall (2).

5. The method for constructing a pavement area of a bridge according to claim 2, comprising:

step one: building a second area (3) and a bridge back wall (2), determining the position and the width of an expansion joint (4) according to a branch line in a bridge construction drawing, and arranging one expansion joint (4) at each bridge branch line in the second area (3), wherein two adjacent expansion joints (4) are separated by 30m;

step two: building a first area (1) close to one side of each bridge back wall (2), wherein the first area is positioned at the bridge head and comprises a cable well (5); the top elevation of the first area (1) is consistent with the elevation of the second area (3), and the width of the first area is consistent with the width of the second area (3);

step three: a plurality of first cable pipelines (6) which are arranged side by side are respectively laid at the tops of the second area (3), the bridge back wall (2) and part of the first area (1) and are used for placing cables, the end parts of the first cable pipelines (6) are respectively 100mm away from the side wall of the nearest expansion joint, one end part of the first cable pipeline (6) closest to the bridge head is flush with the wall of the cable well (5), and a third cable pipeline (8) is arranged on the opposite wall of the cable well (5) and is used for accessing cables in the cable well (5); the opposite ends of each two opposite first cable ducts (6) are sleeved with a second cable duct (7);

step four: casting concrete at the tops of a first cable duct (6) and a second cable duct (7) of the second area (3) on one side of the expansion joint (4) for fixing the first cable duct and the second cable duct; the other side of the expansion joint (4) is only poured with a part of the first cable pipeline (6) far away from the second cable pipeline (7) from the end part of the expansion joint (4), so that the first cable pipeline (6) and the second cable pipeline (7) can be connected in a telescopic way;

and then paving a pavement plate on the top of the second area (3), wherein at least part of the top of the cable well (5) in the first area is provided with an openable filling cover plate, and the top mark heights of the first area (1), the bridge back wall (2) and the second area (3) are equal.

6. The construction method according to claim 5, wherein the filling content of the filling type cover plate is consistent with the material of the top of the second area (3); the top laying content of other parts of the first area (1) except the cable well (5) is consistent with the material of the top of the second area (3).

7. Construction method according to claim 5, characterized in that the two opposite first raceway (6) ends in the second raceway (7) maintain a spacing of expansion joint width +200 as expansion space.