CN212128844U - A bridge deck drainage system of an integral subgrade one-way transverse slope bridge - Google Patents

Abstract

The utility model discloses a bridge deck drainage system of an integral subgrade one-way transverse slope bridge, which comprises a bridge structure and a central dividing belt. Drainage holes and vertical drainage pipes, the longitudinal drainage ditch is arranged at the bottom of the central partition, the bottom of the longitudinal drainage ditch is provided with a vertical drainage outlet, the vertical drainage outlet passes through the bridge structure, and the vertical drainage pipe is arranged in the vertical drainage outlet and is connected with the vertical drainage outlet. The bridge structure is fixed; the first transverse drainage hole is arranged at the bottom of the high side guardrail, and the first transverse drainage hole connects the road surface and the longitudinal drainage ditch. The utility model provides a bridge deck drainage system of an integral subgrade one-way transverse slope bridge, which makes full use of the space between the guardrails on both sides, and uses it as a longitudinal drainage ditch of the bridge deck, without the need for a cover plate, with convenient daily maintenance and low cost. low and high reliability.

Description

A bridge deck drainage system of an integral subgrade one-way transverse slope bridge

technical field

The utility model relates to the technical field of bridge engineering drainage systems, in particular to a bridge deck drainage system of an integral subgrade one-way transverse slope bridge.

Background technique

If the drainage of the bridge deck is not smooth, a water film will be formed after the accumulation of water, which will reduce the anti-skid ability of the bridge deck, reduce the braking effect of high-speed vehicles, and then cause accidents such as vehicle sideslip. Accumulation of water will also lead to a large amount of water splashing from the vehicle, affecting the driver's sight and causing other traffic accidents. The long-term accumulation of water on the bridge deck will also cause rainwater to penetrate into the pavement layer and even the structural layer, reducing the durability of the bridge deck pavement and structure, causing various bridge diseases, and greatly increasing the maintenance workload. The main function of the bridge deck drainage system is to quickly remove the water from the bridge area, which is very important.

At present, the main method of bridge deck drainage is to drain through the vertical and horizontal slopes of the bridge deck, and the bridge deck water is led out through the drainage ditch (or blind ditch) and the drain pipe set on the low side of the cross section, and then drained directly outside the bridge deck or carried out Collect and discharge into the ground drainage system.

Integral roadbed bridges are often wider, some of which will exceed 40m in width, and there will be one-way cross slopes on super-high road sections, while the central divider is equipped with anti-collision guardrails. At this time, the drainage of the bridge deck on the higher side will have greater difficulties. There are two commonly used solutions:

(1) Horizontal drainage holes are opened in the guardrail of the central divider, and the water from the bridge deck on the higher side is first discharged into the bridge deck on the lower side, and then drained through the drainage system on the lower side bridge deck. This method has a simple structure, but the water volume of the lower bridge deck Double the size, there are certain hidden dangers;

(2) Open a longitudinal drainage ditch on the bridge deck at the left guardrail on the higher side of the bridge deck to collect the bridge deck water, and then drain the rainwater through the vertical drainage pipe at the top of the bridge pier. This method has a good drainage effect, but a long cover plate needs to be installed on the top of the drainage ditch, and the cover plate is easily damaged, and the maintenance will affect the traffic, and the cost is high.

Chinese Patent Application Publication No. CN109338879A, published on February 15, 2019, titled "A two-in-one bridge deck drainage system for steel structure bridges", discloses a two-in-one bridge deck drainage system for steel structure bridges: sidewalk The interior space of the ground burden forms the bridge deck drainage pipe. The space above the bridge deck on the inner side of the sidewalk tunnel is provided with a stainless steel rainwater collection tank. The inner side of the sidewalk tunnel is provided with a drainage grille connected to the stainless steel rainwater collection tank. The bridge deck drainage pipes on both sides of the expansion joint The bridges are connected by rubber flexible joints, and the bridge deck drainage pipes are connected to the ground rainwater wells through downpipes placed at the piers or abutments. The invention skillfully utilizes the space of the stainless steel burden on the sidewalk as the bridge deck drainage pipe, which not only beautifies the bridge, but also solves the adverse effect on the landscape caused by the exposed drainage pipe of the conventional bridge. However, this patent does not apply to the deck drainage of one-way transverse slope bridges.

SUMMARY OF THE INVENTION

In order to overcome the problems in the prior art that the cover plate of the bridge deck drainage ditch of the one-way cross-slope bridge is easily damaged, the traffic will be affected during maintenance, and the construction cost is relatively high, the utility model provides a bridge of an integral roadbed one-way cross-slope bridge. The surface drainage system makes full use of the space between the guardrails on both sides and uses it as the longitudinal drainage ditch of the bridge deck, without the need for a cover plate, which is convenient for daily maintenance, low cost and high reliability.

In order to achieve the above object, the utility model adopts the following technical solutions:

A bridge deck drainage system for an integral subgrade one-way transverse slope bridge, comprising a bridge structure and a central divider, wherein the central divider includes a high-side guardrail and a low-side guardrail, and also includes a longitudinal drainage ditch, a first transverse drainage hole and a vertical The drainage pipe, the longitudinal drainage ditch is arranged at the bottom of the central dividing belt, the bottom of the longitudinal drainage ditch is provided with a vertical drainage port, the vertical drainage port passes through the bridge structure, and the vertical drainage pipe is arranged in the vertical drainage port and fixed with the bridge structure; A transverse drainage hole is arranged at the bottom of the high side guardrail, and the first transverse drainage hole connects the road surface and the longitudinal drainage ditch.

The above technical scheme makes full use of the space between the guardrails on the left and right side bridges of the one-way slope integral subgrade bridge, and uses it as the longitudinal drainage ditch of the bridge deck, without the need for cover plates, which is convenient for daily maintenance, low cost and high reliability. ;Drain the bridge deck water from the higher side into the longitudinal drainage ditch between the guardrails of the central divider through the horizontal drain pipe at the bottom of the high side guardrail; at the top of each pier, the bridge deck water is led under the bridge through the vertical drain pipe and connected to the ground drainage system. The above technical solution does not increase the drainage burden of the lower bridge deck, and the bridge deck water will not flow directly under the bridge.

Preferably, a leveling layer is provided at the bottom of the longitudinal drainage ditch, and the height of the top surface of the leveling layer is lower than the height of the bottom surface of the first transverse drainage hole. The thickness of the leveling layer is about half of the bridge deck pavement layer, and the beam top and the concrete guardrail are waterproofed before laying. The leveling layer can have the effect of leveling and waterproofing.

Preferably, the bridge deck pavement is also included, a longitudinal blind ditch is arranged between the high side guardrail and the bridge deck pavement, and the height of the longitudinal blind ditch is lower than the bridge deck pavement. The bridge deck pavement is generally asphalt, with a certain water seepage gap, and the longitudinal blind ditch can collect and remove the interlayer water seeping under the bridge deck pavement.

Preferably, the inside of the longitudinal blind ditch is gravel. The crushed stone has a supporting function shell to ensure the structural strength of the longitudinal blind ditch, and at the same time, it can seep water.

Preferably, the lower end of the longitudinal blind ditch is provided with a blocking plate and a second transverse drainage hole, and the second transverse drainage hole communicates with the longitudinal blind ditch, the longitudinal drainage ditch and the road surface. The height of the bottom surface of the second transverse drainage hole is higher than the height of the bottom surface of the longitudinal drainage ditch there, and the height of the bottom surface of the second transverse drainage hole is lower than the height of the bottom surface of the longitudinal blind ditch there. The blocking plate is used to intercept the water flowing down the vertical blind ditch and prevent it from flowing under the bridge; the second transverse drainage hole guides the water in the longitudinal blind ditch into the longitudinal drainage ditch and discharges together through the vertical drain pipe.

Preferably, the size of the second transverse drainage hole is larger than that of the first transverse drainage hole. The second transverse drainage hole simultaneously drains the bridge deck water and the water in the longitudinal blind ditch, and the drainage volume is greater than that of the first transverse drainage hole.

Preferably, the vertical drainage pipe includes a drainage pipe, a flange plate and an anchor bolt, the drainage pipe passes through the vertical drainage port, the flange plate is fixed to the drainage pipe, and the anchor bolt fixes the flange plate on the bridge structure. The flange plate is arranged under the leveling layer 3, and the vertical drain pipe with flange is used. The drainage system can be installed after the bridge structure is formed, without pre-embedding in the construction process, which is convenient for construction and the joint connection is reliable.

Preferably, the drainage pipe is a galvanized steel pipe. Has higher strength and better corrosion resistance.

The beneficial effects of the utility model are as follows: (1) The above technical scheme makes full use of the space between the guardrails on both sides of the left and right bridges of the central dividing belt of the one-way slope integral roadbed bridge, and uses it as the longitudinal drainage ditch of the bridge deck without a cover plate. It is convenient to maintain, low cost and high reliability; (2) The drainage of bridge deck water and inter-pavement water is considered separately, the drainage effect is good, the drainage burden of the lower side bridge deck is not increased, and the bridge deck water will not flow directly into the bridge (3) The longitudinal blind ditch can collect and remove the interlayer water seeping under the bridge deck, and the longitudinal blind ditch itself has high strength; (4) The vertical drain pipe with flange is used, and the drainage system It can be installed after the bridge structure is formed, without pre-embedding in the construction process, which is convenient for construction and the joint connection is reliable.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the structural representation of the second transverse drainage hole in the present invention;

Figure 3 is a top view of the present invention.

In the figure: bridge structure 1, vertical drainage outlet 1.1, central divider 2, high side guardrail 2.1, low side guardrail 2.2, longitudinal drainage ditch 3, first horizontal drainage hole 4, vertical drainage pipe 5, drainage pipe 5.1, Flange 5.2, anchor bolts 5.3, leveling layer 6, bridge deck pavement 7, longitudinal blind ditch 8, blocking plate 9, second transverse drainage hole 10.

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 and 3, a bridge deck drainage system of an integral subgrade one-way transverse slope bridge includes a bridge structure 1 and a central divider 2, a longitudinal drainage ditch 3, a first transverse drainage hole 4, a vertical drain The water pipe 5 and the deck pavement 7, the central divider 2 includes the high side guardrail 2.1 and the low side guardrail 2.2.

The longitudinal drainage ditch 3 is arranged at the bottom of the central dividing belt 2, and the bottom of the longitudinal drainage ditch 3 is provided with a leveling layer 6 and a vertical drainage port 1.1, and the top surface height of the leveling layer 6 is lower than the bottom surface height of the first horizontal drainage hole 4; The drain 1.1 passes through the bridge structure 1. The vertical drain pipe 5 includes a drain pipe 5.1 made of galvanized steel pipe, a flange plate 5.2 and an anchor bolt 5.3. The drain pipe 5.1 passes through the vertical drain port 1.1. The flange plate 5.2 and the drain The pipe 5.1 is fixed, and the anchor bolts 5.3 fix the flange 5.2 on the bridge structure 1.

The first transverse drainage hole 4 is arranged at the bottom of the high side guardrail 2.1, and the first transverse drainage hole 4 communicates with the road surface and the longitudinal drainage ditch 3.

There is a longitudinal blind ditch 8 between the high side guardrail 2.1 and the bridge deck pavement 7, and the longitudinal blind ditch 8 is filled with gravel; the bottom surface of the longitudinal blind ditch 8 is lower than the bridge deck pavement 7; as shown in Figure 2, the longitudinal The lower end of the blind ditch 8 is provided with a blocking plate 9 and a second transverse drainage hole 10. The second transverse drainage hole 10 is connected to the longitudinal blind ditch 8, the longitudinal drainage ditch 3 and the road surface; the height of the bottom surface of the second transverse drainage hole 10 The height of the bottom surface of the second transverse drainage hole 10 is lower than that of the longitudinal blind ditch 8 here; the size of the second transverse drainage hole 10 is larger than that of the first transverse drainage hole 4 .

The above technical scheme makes full use of the space between the central dividing belt 2 of the one-way slope integral roadbed bridge between the guardrails on both sides of the bridge, and uses it as the longitudinal drainage ditch 3 of the bridge deck, which does not require a cover plate, and is convenient for daily maintenance, low cost and reliable. High; open the horizontal drainage pipe 5.1 at the bottom of the high side guardrail 2.1 to discharge the higher side deck water into the longitudinal drainage ditch 3 between the guardrails of the central divider 2; at the top of each pier, the bridge deck water is led to the Under the bridge, access to the ground drainage system. The above technical solution does not increase the drainage burden of the lower bridge deck, and the bridge deck water will not flow directly under the bridge. The longitudinal blind ditch 8 can collect and drain the interlayer water that seeps under the bridge deck pavement 7 . The blocking plate 9 is used to intercept the water flowing down the longitudinal blind ditch 8 to prevent it from flowing under the bridge; the second transverse drainage hole 10 guides the water in the longitudinal blind ditch 8 into the longitudinal drainage ditch 3, through the vertical drain pipe 5 discharged together.

Claims (8)

1. a bridge deck drainage system of an integral roadbed one-way transverse slope bridge, comprising a bridge structure and a central dividing belt, the central dividing belt comprising a high side guardrail and a low side guardrail, it is characterized in that, also comprises longitudinal drainage ditch, first Horizontal drainage holes and vertical drainage pipes, the longitudinal drainage ditch is arranged at the bottom of the central dividing belt, the bottom of the longitudinal drainage ditch is provided with a vertical drainage outlet, the vertical drainage outlet passes through the bridge structure, and the vertical drainage pipe is arranged in the vertical drainage outlet and It is fixed with the bridge structure; the first transverse drainage hole is arranged at the bottom of the high side guardrail, and the first transverse drainage hole connects the road surface and the longitudinal drainage ditch. 2. The bridge deck drainage system of a monolithic roadbed one-way transverse slope bridge according to claim 1, wherein the bottom of the longitudinal drainage ditch is provided with a leveling layer, and the top surface height of the leveling layer is lower than the first horizontal drainage The height of the bottom of the hole. 3. The bridge deck drainage system of an integral subgrade one-way transverse slope bridge according to claim 1 or 2, characterized in that it also comprises bridge deck pavement, and between the high side guardrail and the bridge deck pavement is provided Longitudinal blind ditch, the height of the longitudinal blind ditch is lower than the bridge deck pavement. 4 . The bridge deck drainage system of an integral subgrade one-way transverse slope bridge according to claim 3 , wherein the longitudinal blind ditch is filled with gravel. 5 . 5. The bridge deck drainage system of an integral subgrade one-way transverse slope bridge according to claim 3, wherein the lower end of the longitudinal blind ditch is provided with a blocking plate and a second transverse drainage hole , the second transverse drainage hole is connected with the longitudinal blind ditch, the longitudinal drainage ditch and the road surface. 6 . The bridge deck drainage system of an integral subgrade one-way transverse slope bridge according to claim 5 , wherein the size of the second transverse drainage hole is larger than that of the first transverse drainage hole. 7 . 7. The bridge deck drainage system of an integral subgrade one-way transverse slope bridge according to claim 1 or 2, wherein the vertical drainage pipe comprises a drainage pipe, a flange plate and an anchor bolt, and the drainage pipe Through the vertical drain, the flange is fixed with the drain pipe, and the anchor bolts fix the flange on the bridge structure. 8 . The bridge deck drainage system of an integral subgrade one-way transverse slope bridge according to claim 7 , wherein the drainage pipe is a galvanized steel pipe. 9 .

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