Mounting structure suitable for pressure water supply pipeline on large-span suspension bridge

Abstract

The utility model relates to an installation structure suitable for a pressure water supply pipeline on a large-span suspension bridge, which comprises a main bridge, two ends of the main bridge are connected with approach bridges, the water supply pipeline is erected on the upper sides of the main bridge and the approach bridges, erecting structures on the two approach bridges are symmetrically arranged relative to the midpoint of the main bridge, and dragging piers are arranged at the front ends of the approach bridges. A plurality of sliding supports, a special expansion joint and a double-spherical expansion joint are sequentially arranged on the approach bridge from one end close to the dragging pier; a fixed support is arranged in the middle of the main bridge, and a plurality of sliding supports are arranged on the two sides of the fixed support. A plurality of sliding supports, a special expansion joint, a double-spherical expansion joint and a lengthened sliding support are arranged on an approach bridge, a fixed support is arranged at the span center of a main bridge, and a plurality of sliding supports are arranged on the two sides of the fixed support, so that the deformation of a water supply pipeline is controllable, and the water supply pipeline can adapt to the expansion deformation of a bridge and the temperature load of a steel pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of water supply pipeline erection, in particular to an installation structure suitable for pressure water supply pipelines on large-span suspension bridges. Background Art

[0002] Crossing rivers with water supply pipelines is of great significance for enhancing the interconnection capacity of water supply networks between regions and achieving coordinated urban development. At present, there are three main ways to cross rivers with water supply pipelines:

[0003] (1) Along the riverbed, across the river below the riverbed, according to the site selection, water depth, implementation risk and other factors, you can choose the jacking method, shield method, immersed tube method, etc. The advantage of this method is that after completion, the pipeline is located at the bottom of the riverbed, which has little impact on the navigation capacity of the river. Disadvantages: long construction period, high construction difficulty, and high maintenance difficulty after the pipeline is built;

[0004] (2) Build a dedicated cross-river pipe bridge. The advantage of this solution is that it can be used for a dedicated purpose, which is easy to maintain and manage. Disadvantages: For large cross-river water supply pipelines, building a pipe bridge is costly and not worth the cost. In addition, the construction of the pipe bridge may affect the navigation function of the river.

[0005] (3) Using the existing main body of the bridge to cross the river. The advantages of this solution are short construction period, easy construction and maintenance, and little impact on the navigation capacity of the river after completion. Disadvantages: If the bridge does not reserve pipe positions at the beginning of the design, the newly added water supply pipeline must be within the allowable load range of the bridge and cannot have a negative impact on the main structure of the bridge.

[0006] Given the complexity and changeability of underwater terrain and the difficulty of operation, water supply pipelines often use existing bridge bodies to cross the river. Even if the bridge is not designed with water pipe positions reserved on the sidewalk or steel box girder, if the load allows and the installation space meets the requirements, the water supply pipeline can be installed in an overhead manner on the bridge deck at the central dividing strip of the bridge.

[0007] In order to adapt to the expansion and contraction deformation under temperature changes, conventional overhead steel pipes are generally equipped with a common expansion joint every 200m. However, for pipelines laid on the deck of steel box girder suspension bridges, the expansion and contraction deformation of the bridge must also be synchronized. Considering the effects of temperature loads and wind loads, the expansion and contraction deformation of steel box girder suspension bridges is much greater than that of conventional overhead steel pipes. Therefore, a mounting structure suitable for pressure water supply pipelines on large-span suspension bridges is needed to solve the above technical problems. Utility Model Content

[0008] The utility model aims at the technical problems existing in the prior art and provides an installation structure suitable for a pressure water supply pipeline on a large-span suspension bridge.

[0009] The utility model provides a technical solution to the above-mentioned technical problems as follows: a mounting structure suitable for a pressure water supply pipeline on a large-span suspension bridge, comprising a main bridge, both ends of the main bridge are connected to approach bridges, the water supply pipeline is erected on the upper sides of the main bridge and the approach bridges, the erection structures on the two approach bridges are symmetrically arranged about the midpoint of the main bridge, a dragging pier is arranged at the front end of the approach bridge, and a plurality of sliding bearings, special expansion joints, and double spherical expansion joints are sequentially arranged on the approach bridge from one end close to the dragging pier; a fixed bearing is arranged in the middle of the main bridge, and a plurality of sliding bearings are arranged on both sides of the fixed bearing.

[0010] Preferably, the above-mentioned installation structure is suitable for a pressure water supply pipe on a large-span suspension bridge, wherein the sliding support includes a roller pad groove, a first arc-shaped support plate, a rib groove and a plurality of rollers, the plurality of rollers are arranged in parallel in the roller pad groove, the rib groove is located on the upper side of the roller, the first arc-shaped support plate is fixed on the upper side of the rib groove, and the upper side of the first arc-shaped support plate is used to place the water supply pipe.

[0011] Preferably, in the above-mentioned installation structure suitable for a pressure water supply pipe on a long-span suspension bridge, the sliding support further comprises a rectangular square steel pipe, and the rectangular square steel pipe is enclosed on the outside of the water supply pipe.

[0012] Preferably, the above-mentioned installation structure is suitable for a pressure water supply pipeline on a large-span suspension bridge, wherein the fixed support includes a second steel pier support and a second arc-shaped support plate, the second steel pier support is fixed to the bottom of the second arc-shaped support plate, and the upper side of the second arc-shaped support plate is used to place the water supply pipeline.

[0013] Preferably, the above-mentioned installation structure is suitable for pressure water supply pipelines on large-span suspension bridges, wherein a second I-beam is welded to the bottom of the second steel pier support, and the second I-beam is welded and fixed to the railing foundation of the central dividing strip of the main bridge.

[0014] Preferably, the above-mentioned installation structure is suitable for a pressure water supply pipeline on a large-span suspension bridge, wherein the sliding support includes a first sliding support, a first steel pier support is fixed to the bottom of the first sliding support, an embedded part adapted to the first steel pier support is installed on the top surface of the steel box girder of the approach bridge, and the bottom of the first steel pier support is fixedly connected to the embedded part.

[0015] Preferably, the above-mentioned installation structure is suitable for a pressure water supply pipeline on a large-span suspension bridge, wherein the sliding support includes a second sliding support, a first I-beam is welded and fixed to the bottom of the second sliding support, and the first I-beam is welded and fixed to the railing foundation of the central dividing strip of the main bridge.

[0016] The beneficial effects of the utility model are as follows: the utility model arranges multiple sliding bearings, special expansion joints, double spherical expansion joints, and lengthened sliding bearings on the approach bridges at both ends, arranges a fixed bearing at the center of the main bridge span, and arranges multiple sliding bearings on both sides of the fixed bearing, thereby ensuring that the deformation of the water supply pipeline is controllable and can adapt to the expansion and contraction deformation of the bridge and the temperature load of the steel pipe itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the installation structure of the water supply pipeline on the approach bridge and the front end of the approach bridge;

[0018] Figure 2 This is a schematic diagram of the installation structure of the water supply pipeline on the main bridge;

[0019] Figure 3 is a schematic diagram of the cross section of the main bridge;

[0020] Figure 4 This is a schematic diagram of the cross section of the approach bridge;

[0021] Figure 5 is a front view structural schematic diagram of the first sliding support;

[0022] Figure 6 is a cross-sectional view of the first sliding support;

[0023] Figure 7 is a front view structural schematic diagram of the second sliding support;

[0024] Figure 8 It is a schematic diagram of the front view structure of the fixed support.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Water supply pipeline, 2. Drag pier, 3. First I-beam, 4. Extended sliding bearing, 5. First sliding bearing, 51. First steel pier bearing, 52. Roller pad groove, 53. Roller, 54. Rib groove, 55. First arc support plate, 56. Rectangular square steel pipe, 6. Double ball expansion joint, 7. Special expansion joint, 8. Fixed bearing, 81. Second steel pier bearing, 82. Second arc support plate, 9. Second I-beam, 10. Second sliding bearing. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, an installation structure suitable for a pressure water supply pipeline on a large-span suspension bridge includes a main bridge, both ends of the main bridge are connected to approach bridges, and the erection structures on the two approach bridges are symmetrically arranged about the midpoint of the main bridge, that is, the erection mechanisms on the two approach bridges are consistent. Figure 1 The AB section in the middle is a schematic diagram of the installation structure on the approach bridge. Figure 2 The schematic diagram of the installation structure of the middle BC section on the main bridge, where points B and C are the connection positions between the main bridge and the approach bridges at both ends. A central dividing strip is set on both the main bridge and the approach bridge, and the water supply pipeline 1 is set up at the central dividing strip on the upper side of the main bridge and the approach bridge.

[0029] The water supply pipeline 1 is laid underground before going up the bridge and after going down the bridge, and is laid overhead with a central dividing strip on the main bridge and the approach bridge. Trailing piers 2 are provided at the front ends of the two approach bridges, that is, the trailing piers 2 are located at both ends of the bridge. The front end of the water supply pipeline 1 laid on the bridge is fixed by the trailing piers 2. The function of the trailing piers 2 is to fix the water supply pipeline 1 to ensure that the expansion and contraction deformation of the pipeline on the bridge is not transmitted to the buried pipeline under the bridge. The trailing piers 2 are made of reinforced concrete and are located on the overhead pipeline after the water supply pipeline 1 passes through the ground. The distance from the bend is 2.5m or 3m, and it cannot be located at the deformation joint of the approach bridge.

[0030] like Figure 1 , Figure 5 , Figure 6 As shown, the approach bridge is provided with a plurality of sliding bearings, a special expansion joint 7, and a double spherical expansion joint 6 in sequence from one end close to the dragging pier 2. In order to distinguish the sliding bearings of the approach bridge and the main bridge in the following text, the sliding bearing on the approach bridge is named as the first sliding bearing 5, and the sliding bearing on the main bridge is named as the second sliding bearing 10. The first sliding bearing 5 and the second sliding bearing 10 have the same structure, but are fixedly installed on the bridge in different ways.

[0031] The first sliding support 5 is made of Q235B, and includes a roller pad groove 52, a first arc-shaped support plate 55, a rib groove 54, a rectangular square steel pipe 56, and a plurality of rollers 53. The plurality of rollers 53 are arranged in parallel in the roller pad groove 52, the rib groove 54 is located on the upper side of the roller 53, the first arc-shaped support plate 55 is fixed on the upper side of the rib groove 54, the upper side of the first arc-shaped support plate 55 is used to place the water supply pipe 1, and the rectangular square steel pipe 56 is enclosed on the outer side of the water supply pipe 1. The roller pad groove 52 is fixed on the first steel buttress support 51, and the top surface of the steel box girder of the approach bridge is installed with an embedded part adapted to the first steel buttress support 51. The embedded part should be constructed synchronously with the approach bridge. After the first steel buttress support 51 is installed, the pavement layer of the approach bridge deck is implemented, and the bottom of the first steel buttress support 51 is fixedly connected to the embedded part. The roller groove 52 is filled with special grease (the roller is fully coated with grease), which is required to have good low temperature (≤-30°C), high temperature (60-80°C) performance, lubrication performance and anti-corrosion performance. Under the action of the roller 53, the water supply pipeline 1 can slide along the axial direction of the pipeline, thereby ensuring the axial expansion and contraction of the pipeline.

[0032] The first sliding bearing 5 needs to be treated with anti-corrosion, and the number, spacing and grouping should be determined based on the calculation results and actual site conditions. However, the expansion joint of the approach bridge should be avoided, and the distance from the edge of the expansion joint should not be less than 2m.

[0033] In addition, an extended sliding support 4 is provided on the approach bridge. The difference between the extended sliding support 4 and the first sliding support 5 is that it adopts a longer rib groove and a longer arc-shaped support plate. The other technical features are the same. Its function is to ensure that this section of the pipeline has a larger telescopic deformation space.

[0034] A special expansion joint 7 is installed at the expansion joint of the bridge between the two extended sliding supports 4. The function of the special expansion joint 7 is to resist the axial expansion and contraction of the pipeline. Its characteristic is that it can meet the high-frequency expansion and contraction deformation requirements of the pipeline. Its expansion amount should be determined according to calculation. When the expansion joint of the bridge is centered, the special expansion joint 7 should be installed in the center; when it cannot be centered, the installation position of the special expansion joint 7 should match the expansion joint of the bridge.

[0035] A double ball expansion joint 6 is arranged between the last extended sliding support 4 on the approach bridge and the main bridge. The function of the double ball expansion joint 6 is to adapt to the small lateral deformation of the high-frequency pipeline, and its expansion amount should be determined according to calculation. When the bridge expansion joint is centered, the double ball expansion joint 6 should be installed in the center; when the center cannot be met, the installation position of the double ball expansion joint 6 should match the bridge expansion joint.

[0036] like Figure 2 , Figure 7 , Figure 8As shown, a fixed support 8 is provided at the center of the span of the main bridge, and multiple second sliding supports 10 are provided on both sides of the fixed support 8. No telescopic joint is provided, and the first I-beam 3 is welded and fixed to the bottom of the sliding support. The second sliding support 10 is located at the cross diaphragm of the steel box girder of the main bridge, and is fixed to the railing foundation of the central dividing strip of the main bridge by welding the first I-beam 3. All the above components need to be treated with anti-corrosion. The number, spacing and grouping of the second sliding supports 10 should be determined based on the calculation results and the actual situation on site.

[0037] The fixed support 8 is located at the cross diaphragm of the steel box girder of the main bridge. The fixed support 8 includes a second steel pier support 81 and a second arc-shaped support plate 82. The second steel pier support 81 is welded and fixed to the bottom of the second arc-shaped support plate 82. A second I-beam 9 is welded to the bottom of the second steel pier support 81. The upper side of the second arc-shaped support plate 82 is used to place the water supply pipe 1 to provide support for the water supply pipe 1. The second I-beam 9 is welded and fixed to the railing foundation of the central dividing strip of the main bridge.

[0038] The utility model ensures that the deformation of the water supply pipeline 1 is controllable and can adapt to the expansion and contraction deformation of the bridge and the temperature load of the steel pipe itself.

[0039] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. An installation structure for a pressure water supply pipeline on a long-span suspension bridge, comprising a main bridge, both ends of the main bridge are connected to approach bridges, and a water supply pipeline (1) is erected on the upper side of the main bridge and the approach bridge, characterized in that: The erection structures on the two approach bridges are symmetrically arranged about the midpoint of the main bridge. A towing pier (2) is arranged at the front end of the approach bridge. A plurality of sliding bearings, a special expansion joint (7), and a double spherical expansion joint (6) are arranged in sequence on the approach bridge from one end close to the towing pier (2); a fixed bearing (8) is arranged in the middle of the main bridge, and a plurality of sliding bearings are arranged on both sides of the fixed bearing (8).

2. The installation structure for pressure water supply pipelines on long-span suspension bridges according to claim 1 is characterized in that: The sliding support comprises a roller pad groove (52), a first arc-shaped supporting plate (55), a rib groove (54) and a plurality of rollers (53); the plurality of rollers (53) are arranged in parallel in the roller pad groove (52); the rib groove (54) is located on the upper side of the roller (53); the first arc-shaped supporting plate (55) is fixed on the upper side of the rib groove (54); and the upper side of the first arc-shaped supporting plate (55) is used for placing the water supply pipe (1).

3. The installation structure for pressure water supply pipelines on long-span suspension bridges according to claim 2 is characterized in that: The sliding support further comprises a rectangular square steel pipe (56), and the rectangular square steel pipe (56) is enclosed on the outside of the water supply pipe (1).

4. The installation structure for pressure water supply pipelines on long-span suspension bridges according to claim 1 is characterized in that: The fixed support (8) comprises a second steel buttress support (81) and a second arc-shaped support plate (82); the second steel buttress support (81) is fixed to the bottom of the second arc-shaped support plate (82); and the upper side of the second arc-shaped support plate (82) is used to place the water supply pipe (1).

5. The installation structure for pressure water supply pipelines on long-span suspension bridges according to claim 4 is characterized in that: A second I-beam (9) is welded to the bottom of the second steel pier support (81), and the second I-beam (9) is welded and fixed to the railing foundation of the central dividing strip of the main bridge.

6. The installation structure for pressure water supply pipelines on long-span suspension bridges according to claim 1 is characterized in that: The sliding support comprises a first sliding support (5), a first steel pier support (51) being fixed at the bottom of the first sliding support (5), an embedded part adapted to the first steel pier support (51) being installed on the top surface of the steel box girder of the approach bridge, and the bottom of the first steel pier support (51) being fixedly connected to the embedded part.

7. The installation structure for pressure water supply pipelines on long-span suspension bridges according to claim 1 is characterized in that: The sliding support comprises a second sliding support (10), a first I-beam (3) being welded and fixed to the bottom of the second sliding support (10), and the first I-beam (3) being welded and fixed to the railing foundation of the central dividing strip of the main bridge.

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