Bridge expansion joint edge drainage asphalt pavement internal seepage rapid drainage device

Abstract

The utility model belongs to the technical field of pavement drainage, and particularly relates to a rapid drainage device for internal seepage of a drainage asphalt pavement at the edge of a bridge expansion joint. Comprising the steps that a transverse water collecting pipe is arranged in drainage asphalt on the side edge of the expansion joint to form a drainage cavity; the cross section of the transverse water collecting pipe is a trapezoidal steel pipe, and the inclined side of the trapezoid is a water-passing steel plate which is provided with a water-passing hole facing the driving direction; the device further comprises a water collecting hopper and a water outlet bent pipe. A small opening at the bottom of the water collecting hopper is in sealed butt joint with a water outlet elbow pipe; the large opening of the water collecting hopper is butted and communicated with the bottom surface of the end part of the transverse water collecting pipe; the water outlet elbow is connected with a main drainage pipe of the bridge body through a siphon drainage hose; seepage water in the drainage asphalt is rapidly drained to the main drainage pipe in a siphon mode. The drainage device is simple in structure, high in drainage efficiency and stable, accumulated water near the expansion joint can be rapidly and timely drained, and the driving comfort and safety are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pavement drainage, and in particular relates to an internal seepage velocity drainage device for a drainage asphalt pavement at the edge of a bridge expansion joint. Background Art

[0002] Drainage asphalt pavement adopts a porous structure, with the characteristics of drainage and noise reduction, and no water mist during driving. It has been successfully applied in many road and bridge projects since this century, especially in urban elevated expressways in recent years. Drainage asphalt pavement is used on urban elevated bridges. Rainwater will flow into the asphalt in the pavement to form seepage water; seepage water is mainly discharged to the centralized drainage facilities on the side of the road through two ways: seepage between internal pores and runoff on the road surface. In the case of less rainfall, after the rainwater seeps down, seepage between the internal pores along the slope of the bridge deck is the main drainage method.

[0003] Bridge expansion joints are used to adjust the bridge deck displacement caused by vehicle loads and temperature changes to accommodate the smooth passage of bridge loads. They are essential facilities on bridges and are generally set up for each span or several spans in a city viaduct to meet the bridge displacement requirements.

[0004] The expansion joint of the bridge is an impermeable structure, which divides the drainage asphalt pavement on the plane and blocks the internal seepage of the drainage asphalt pavement. Especially during heavy rains, excessive rainfall will cause water gushing in the rain, accumulation of seepage water, and accumulation of water on the road surface after rain, thus affecting driving safety and comfort, and also affecting the life of the asphalt pavement.

[0005] At present, when drainage asphalt pavement is used on elevated roads, the expansion joints are still located in the same way as impermeable pavement. A spring tube with a diameter of only 5-20mm is buried at the junction of the expansion joint and the pavement. This method mainly collects a small amount of seepage at the interface between the expansion joint and the impermeable pavement. When used in drainage asphalt pavement, the small cavity of the spring tube is no different from the pores of drainage asphalt, and it is impossible to quickly remove the retained water inside the asphalt. In addition, with the rolling of vehicles, the spring tube is easily squeezed and deformed, blocked and ineffective. Therefore, it has become a common problem for urban elevated roads with drainage asphalt pavement today that a large amount of water accumulates near the expansion joints in the rain, and the accumulated water does not dissipate for a long time after the rain. Summary of the invention

[0006] The utility model aims to provide a device for draining the internal seepage flow of an asphalt pavement at the edge of a bridge expansion joint with good water permeability and rapid water drainage.

[0007] The utility model provides a drainage device for the internal seepage flow of the asphalt pavement at the edge of the bridge expansion joint, which is an independent drainage system with complete functions from collection to discharge built in the pavement structure layer. The whole system is independent of other bridge deck drainage systems, and can collect and discharge water separately. It can automatically switch between the gravity drainage mode and the siphon drainage mode as the degree of water accumulation changes, and solves the problem of rapid removal of the internal blocked water at the edge of the bridge expansion joint mentioned above; it includes: a collection device for the seepage water at the edge of the expansion joint, a pressure flow water collecting bucket and a siphon drainage device; wherein:

[0008] The device for collecting the seepage blocking water at the edge of the expansion joint is a transverse water collecting pipe arranged in the drainage asphalt area laid on the side of the expansion joint to form a drainage cavity;

[0009] The transverse water collecting pipe adopts a steel pipe with a trapezoidal cross section. The steel pipe cavity in the pipe body is used as a drainage cavity for collecting seepage water; one side of the trapezoidal hypotenuse is a water-passing steel plate, which is provided with a plurality of water-passing holes; the seepage water blocked in the asphalt inside the road surface enters the steel pipe cavity through the water-passing holes to form free water, thereby accelerating drainage;

[0010] The water-passing steel plate (the inclined surface of the transverse water collecting pipe) faces the driving direction; this can improve the transition of the rigid-flexible interface between the transverse water collecting pipe and the asphalt material, reduce the load impact of driving on the pre-buried transverse water collecting pipe, and facilitate the deformation coordination of the asphalt material;

[0011] The pressure flow water collecting bucket is arranged at the end of the transverse water collecting pipe and serves as a water accumulation device, including a water inlet grid plate, a water collecting bucket and a water outlet elbow;

[0012] The top opening of the water collecting bucket is larger than the bottom opening, and the water inlet grille plate is arranged at the top opening of the water collecting bucket; the water outlet elbow is arranged at the bottom opening of the water collecting bucket and is sealed and connected; the top opening of the water collecting bucket and the bottom surface of the end of the horizontal water collecting pipe are connected and connected, and the water inlet grille plate serves as a partition plate;

[0013] The siphon drainage device comprises a siphon drainage hose and a main drainage pipe of the bridge body;

[0014] The main drainage pipe is arranged along the edge of the bridge and is a bridge pavement drainage pipe; an opening is arranged on the main drainage pipe;

[0015] The siphon drainage hose is arranged in the main drainage pipe, vertically downward along the wall of the main drainage pipe; the water inlet of the siphon drainage hose is connected to the outlet elbow of the pressure flow water collecting bucket through a transfer pipe;

[0016] The transfer pipe passes through the opening of the main drain pipe, and the opening position is sealed.

[0017] In the utility model, the water holes are circular through holes or grid-like through holes arranged in an array with equal spacing.

[0018] In the utility model, the cross section of the tube body of the horizontal water collecting tube is a right-angle trapezoid.

[0019] In the utility model, support rods are intermittently arranged in the body of the transverse water collecting pipe to enhance the overall rigidity.

[0020] In the utility model, the transverse water collecting pipe is fixed on the concrete pavement of the bridge through the outwardly extending wing plate of the long side of the lower bottom and the connecting bolt component.

[0021] In the utility model, the water inlet grille plate above the water collecting bucket can play the role of preventing vortexes, greatly reducing the amount of air entrained when the water collected in the horizontal water collecting pipe enters the drainage system, the upper opening is connected to the rectangular opening at the bottom of the horizontal water collecting pipe, and the lower opening shrinks and changes diameter to connect the siphon drainage hose. When the water volume is large, the siphon drainage hose presents a full pipe flow state, and the water in the pipe falls under the action of gravity to form a siphon effect, and negative pressure appears within a certain range in the pipe. The rainwater in the water collecting bucket is discharged at a higher flow rate under the suction effect of the negative pressure in the pipe.

[0022] In the utility model, the inclined surface of the water-passing steel plate is designed to face the driving direction, so that the force-bearing surface of the impact force transmitted by the wheel through the asphalt is maximized, which can greatly reduce the load impact of driving on the pre-buried transverse water-collecting pipe, which is beneficial to the deformation coordination of the asphalt material and to prolonging the service life of the transverse water-collecting pipe.

[0023] In the actual road operation process, the utility model first introduces the blocked drainage asphalt pore seepage water into the horizontal water collection pipe, and collects it in the cavity of the collection pipe along the cross slope to the roadside water accumulation bucket in the form of free water, and then enters the downstream drainage connection pipe through the water collection bucket and the siphon drainage device, and finally discharges it into the ground drainage system;

[0024] During actual road operation, the utility model can drain water under both gravity and siphon states. In the early stage of rainfall, when there is less stagnant water inside the road surface, the system is in a wave flow and pulse flow state, and uses the principle of gravity to drain water. When the rainfall increases and the surface water on the road surface at the edge of the expansion joint reaches a certain thickness, the water collecting bucket will automatically isolate the air, and even the horizontal water collecting pipe will be partially full of flow. A siphon full-tube pressure flow will appear in the siphon drainage hose, and the drainage state will be transformed into an efficient siphon discharge mode, which sucks rainwater and discharges it downward quickly, and at the same time has a good self-cleaning effect.

[0025] The utility model is a technical improvement and perfection of the existing application of drainage asphalt on elevated roads. By optimizing the structure of the embedded horizontal water collection pipe, it not only realizes the formation of a sufficiently large drainage cavity in the road, but also takes into account the problem of its own strength and the problem of transition between the rigid and flexible interface. By establishing an independent siphon drainage channel on the road side, the discharge speed of seepage water during heavy rain is greatly improved, and the risk of sediment deposition in the drainage system is reduced, thereby effectively solving the technical problem of "permeability but not drainage" of drainage asphalt pavement at the expansion joint position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram showing the structure of the utility model.

[0027] Figure 2 It is a cross-sectional schematic diagram of a transverse water collecting pipe at an expansion joint of a bridge according to the utility model.

[0028] Figure 3 It is a schematic diagram of the plane layout of the internal seepage velocity drainage system of the asphalt pavement at the expansion joint of the bridge of the utility model.

[0029] Figure 4 This is a schematic diagram of the large-scale connection between the horizontal drainage pipe and the bridge drainage ditch of the utility model.

[0030] Figure 5 It is a schematic diagram of the overall elevation layout of the utility model and the bridge.

[0031] Numbers in the figure: 1 is a transverse water collecting pipe, 2 is a water passing steel plate, 3 is a water passing hole, 4 is a water inlet grille plate, 5 is a water collecting bucket, 6 is a water outlet elbow, 7 is a siphon drainage hose, 8 is a main drainage pipe, 9 is a rubber connecting pipe, 10 is a 90-degree elbow, 11 is a steel pipe cavity, 12 is a support rod, 13 is a bridge expansion joint structure, and 14 is a drainage asphalt area. DETAILED DESCRIPTION

[0032] The utility model is an independent drainage system with complete functions from collection to discharge built in the pavement structure layer. The whole system is independent of other bridge deck drainage systems, and can collect and discharge water separately. It can automatically switch between gravity drainage mode and siphon drainage mode as the degree of water accumulation changes.

[0033] Specifically include: a collection device for seepage water at the edge of the expansion joint, a pressure flow water collection bucket and a siphon drainage device; wherein:

[0034] The device for collecting the seepage blocking water at the edge of the expansion joint is a transverse water collecting pipe 1 provided in the drainage asphalt area 14 laid on the side of the expansion joint to form a drainage cavity;

[0035] The transverse water collecting pipe 1 adopts a steel pipe with a right-angle trapezoidal cross section. The steel pipe cavity in the pipe body for collecting seepage water is used as a drainage cavity; the straight side waist of the trapezoid faces the expansion joint; one side of the trapezoidal oblique side waist is a water-passing steel plate 2, which is provided with a plurality of water-passing holes 3, and the water-passing steel plate 2 faces the driving direction; the seepage water blocked in the asphalt inside the road surface enters the steel pipe cavity through the water-passing holes 3 to form free water, accelerating drainage; support rods are intermittently arranged in the pipe body of the transverse water collecting pipe 1 to enhance the overall rigidity;

[0036] The water holes 3 are circular through holes arranged in an array with equal spacing.

[0037] The pressure flow water collecting bucket is arranged at both ends of the transverse water collecting pipe 1, and serves as a water accumulation device, including a water inlet grid plate 4, a water collecting bucket 5 and a water outlet elbow 6;

[0038] The top opening of the water collecting bucket 5 is larger than the bottom opening, and the water inlet grid plate 4 is arranged at the top opening of the water collecting bucket 5; the water outlet elbow 6 is arranged at the bottom opening position of the water collecting bucket 5, and is sealed and connected; the top opening of the water collecting bucket 5 and the bottom surface of the end of the horizontal water collecting pipe 1 are connected and connected, and the water inlet grid plate 4 is used as a partition plate; Figure 1 shown.

[0039] The siphon drainage device comprises a siphon drainage hose 7, a main drainage pipe 8 of the bridge body, a rubber connecting pipe 9 and a 90-degree elbow 10;

[0040] The main drainage pipe 8 is arranged along the edge of the bridge, which is a conventional bridge drainage pipe arrangement method, and is used to drain the bridge road surface; an opening is provided on one side of the main drainage pipe 8; one end of the 90-degree elbow 10 is used as a horizontal pipe, passing through the opening, and the edge of the opening is sealed with a sealant; the other end of the 90-degree elbow 10 is inside the main drainage pipe 8, and is vertically downward;

[0041] The rubber connecting pipe 9 is arranged horizontally, one end of which is connected to the outlet elbow pipe 6 of the pressure flow water collecting bucket, and the other end is connected to a horizontal pipe of a 90-degree elbow pipe 10; the rubber connecting pipe 9 is soft, so it has an adjustable offset, which is convenient for construction and maintenance;

[0042] The siphon drainage hose 7 is arranged in the main drainage pipe 8, vertically downward along the wall of the main drainage pipe 8; the water inlet of the siphon drainage hose 7 is connected to the other end of the 90-degree elbow 10 through a transfer pipe, and the water outlet of the siphon drainage hose 7 is vertically downward to discharge the seepage water transferred from the horizontal water collecting pipe 1 through the main drainage pipe 8.

[0043] The transverse water collecting pipe 1 and the water collecting bucket 5 are all prefabricated in the steel structure factory. The water outlet elbow 6 is a 90° elbow. The various drainage pipes involved are rubber hoses, which are fixedly connected by connecting buckles. Finished products can be purchased according to size.

[0044] The transverse water collecting pipe 1 is fixed on the concrete pavement of the bridge through the outwardly extending wing plate of the lower long side and the connecting bolt member.

[0045] In the present invention, the siphon drainage device is a drainage component connected to the water outlet of the water collecting bucket and is placed in the elevated downpipe. Figure 3 , Figure 4 As shown, an integrated pressure-bearing rubber tube is used to reduce interfaces, facilitate the siphon effect, and facilitate construction and installation.

[0046] In the utility model, the water inlet grille plate can play an anti-vortex role when the water volume is large, greatly reducing the amount of air entrained when the water in the horizontal water collecting pipe enters the drainage system. The upper opening is connected to the rectangular opening at the bottom of the horizontal water collecting pipe, and the lower opening shrinks and changes its diameter. When the water volume is large, the water outflow from the lower opening is a pressure flow, and the water outlet pipe is kept in a full pipe flow state, forming a negative pressure, which is quickly discharged.

[0047] The construction operation of this utility model is as follows:

[0048] After the concrete pavement of the bridge deck is poured and maintained, the position of the horizontal water collection pipe is determined by the designed expansion joint width, the concrete surface is cleaned, the water inlet side of the horizontal water collection steel pipe (the direction of the trapezoidal hypotenuse) is placed in the driving direction, the steel pipe is fixed to the concrete pavement layer through steel connectors, and the water collection steel pipe is pre-buried until it penetrates the edge of the roadside water collection well; then the concrete at the edge of the water collection well is grooved, and the side of the water collection well is opened, and the water collection bucket is installed in the groove. The upper end of the water collection bucket is welded to the rectangular opening of the water collection steel pipe, and the lower end of the elbow passes through the opening of the water collection well and connects to a 90-degree elbow. The drainage hose is connected below the elbow, and the clamp buckle is firmly fixed. The drainage hose is placed in the bridge downpipe and penetrates the elevated drainage horizontal pipe and vertical pipe, and finally enters the ground rainwater well. After the drainage system is installed, the empty part of the water collection bucket position is filled with concrete, the garbage on the surface of the horizontal steel pipe is cleaned, and the bridge deck drainage asphalt is paved. When paving asphalt, ensure that the top surface of the horizontal water collection pipe has an asphalt layer of not less than 4cm. When installing the subsequent expansion joints, the position of the embedded steel pipe must first be marked on the asphalt surface through the horizontal pipe exposed in the water collection well, and then the road surface should be cut to install the expansion joints after avoiding the steel pipe position.

[0049] As an example, the dimensions of each component: the dimensions of the horizontal water-collecting trapezoidal steel pipe: upper width is 60mm, lower width is 120mm, height is 60mm, the bevel and top surface of the water inlet are perforated steel plates; the inner dimension of the upper inlet of the water collecting bucket is a 60mmx100mm rectangular opening, the outer dimension of the lower outlet is a 50mm circular opening, and the inner diameter of the drainage hose is 50mm. The entire device is independent of other bridge deck drainage systems, and collects and discharges separately. It can automatically switch between gravity drainage mode and siphon drainage mode as the degree of water accumulation changes, solving the problem of rapid removal of blocked water inside the edge of the bridge expansion joint.

[0050] In the actual road operation process, the utility model first introduces the blocked drainage asphalt pore seepage water into the horizontal water collection pipe, and collects it in the cavity of the collection pipe along the horizontal slope to the roadside water accumulation bucket in the form of free water, and then enters the downstream drainage connecting pipe, drainage horizontal pipe, drainage vertical pipe through the water collection bucket and the siphon drainage device, and finally discharges it into the ground drainage system;

[0051] The inclined surface of the water-passing steel plate is designed to face the driving direction, which can improve the transition of the rigid-flexible interface between the transverse water collecting pipe and the asphalt material, maximize the force-bearing surface of the impact force transmitted by the wheel through the asphalt, and greatly reduce the load impact of driving on the embedded transverse water collecting pipe, which is beneficial to the deformation coordination of the asphalt material and to extending the service life of the transverse water collecting pipe.

[0052] During actual road operation, the utility model can drain water under both gravity and siphon states. In the early stage of rainfall, when there is less stagnant water inside the road surface, the system is in a wave flow and pulse flow state, and uses the principle of gravity to drain water. When the rainfall increases and the surface water on the road surface at the edge of the expansion joint reaches a certain thickness, the water collecting bucket will automatically isolate the air, and even the horizontal water collecting pipe will be partially full of flow. A siphon full-tube pressure flow will appear in the siphon drainage hose, and the drainage state will be transformed into an efficient siphon discharge mode, sucking rainwater and discharging it rapidly downward.

[0053] The utility model has a simple structure and high and stable drainage efficiency, can quickly and timely drain the accumulated water near the expansion joint, and improves the driving comfort and safety.

[0054] Although the above methods are illustrated and described as a series of structures for simplicity of explanation, it should be understood and appreciated that these methods are not specifically limited because according to one or more embodiments, some structures may occur in different orders and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.

[0055] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for draining internal seepage velocity of asphalt pavement at the edge of a bridge expansion joint, characterized in that: include: A collection device for seepage water at the edge of the expansion joint, a pressure flow water collection bucket and a siphon drainage device; wherein: The device for collecting the seepage blocking water at the edge of the expansion joint is a transverse water collecting pipe arranged in the drainage asphalt area laid on the side of the expansion joint to form a drainage cavity; The transverse water collecting pipe adopts a steel pipe with a trapezoidal cross section. The steel pipe cavity in the pipe body is used as a drainage cavity for collecting seepage water; one side of the trapezoidal hypotenuse is a water-passing steel plate, which is provided with a plurality of water-passing holes; the seepage water blocked in the asphalt inside the road surface enters the steel pipe cavity through the water-passing holes to form free water, thereby accelerating drainage; The water-passing steel plate faces the driving direction; this can improve the transition of the rigid-flexible interface between the transverse water collecting pipe and the asphalt material, reduce the load impact of driving on the pre-buried transverse water collecting pipe, and facilitate the deformation coordination of the asphalt material; The pressure flow water collecting bucket is arranged at the end of the transverse water collecting pipe and serves as a water accumulation device, including a water inlet grid plate, a water collecting bucket and a water outlet elbow; The top opening of the water collecting bucket is larger than the bottom opening, and the water inlet grid plate is arranged at the top opening of the water collecting bucket; the water outlet elbow is arranged at the bottom opening of the water collecting bucket and is sealed and butted; The top opening of the water collecting bucket and the bottom surface of the end of the horizontal water collecting pipe are butted and connected, and the water inlet grid plate serves as a partition plate; The siphon drainage device comprises a siphon drainage hose and a main drainage pipe of the bridge body; The main drainage pipe is arranged along the edge of the bridge and is a bridge pavement drainage pipe; an opening is arranged on the main drainage pipe; The siphon drainage hose is arranged in the main drainage pipe, vertically downward along the wall of the main drainage pipe; the water inlet of the siphon drainage hose is connected to the water outlet elbow of the pressure flow water collecting bucket through a transfer pipe; The transfer pipe passes through the opening of the main drain pipe, and the opening position is sealed.

2. The internal seepage velocity drainage device for the drainage asphalt pavement at the edge of a bridge expansion joint as claimed in claim 1, characterized in that: The water holes are circular through holes or grid-like through holes arranged in an array with equal spacing.

3. The internal seepage velocity drainage device for the drainage asphalt pavement at the edge of a bridge expansion joint as claimed in claim 2, characterized in that: The cross section of the tube body of the transverse water collecting tube is a right-angle trapezoid.

4. The internal seepage velocity drainage device for drainage asphalt pavement at the edge of bridge expansion joints as claimed in claim 2, characterized in that: Support rods are intermittently arranged in the body of the transverse water collecting pipe to enhance the overall rigidity.

5. The device for draining internal seepage velocity of asphalt pavement at the edge of bridge expansion joint as claimed in claim 1, characterized in that: The transverse water collecting pipe is fixed on the concrete pavement of the bridge through the outwardly extending wing plate of the lower bottom long side and the connecting bolt member.

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