CN210621457U

CN210621457U - Asphalt bridge floor drainage structure

Info

Publication number: CN210621457U
Application number: CN201920969504.2U
Authority: CN
Inventors: 梁涛; 王孝群
Original assignee: Anhui Xingluo Construction Group Co ltd
Current assignee: Anhui Xingluo Construction Group Co ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-05-26
Anticipated expiration: 2029-06-24

Abstract

The utility model relates to the technical field of bridge drainage, and discloses a drainage structure of an asphalt bridge deck, which comprises a bridge deck, guardrails arranged at two ends of the bridge deck, and an asphalt pavement layer paved on the bridge deck, wherein the upper surface of the asphalt pavement layer is in a micro-arch shape; a drainage pavement layer is laid at the end part of the asphalt pavement layer close to the guardrail; the drainage pavement layer is provided with drainage devices at intervals along the driving direction of the bridge deck; the drainage pavement layer comprises a waterproof layer paved on the bridge deck, a gravel layer paved above the waterproof layer and a permeable layer paved above the gravel layer; the drainage device comprises a drainage hopper arranged in the drainage pavement layer and provided with water permeable holes on the side wall, and a drainage groove which is arranged along the bridge deck towards the lower surface of the bridge deck and communicated with the drainage hopper; the outer side wall of the drainage hopper is wrapped with geotextile. The utility model has the advantages of it is following and effect: the drainage effect is good, and the blockage of a drainage system can not be caused.

Description

Asphalt bridge floor drainage structure

Technical Field

The utility model relates to a bridge drainage technology field, in particular to pitch bridge floor drainage structures.

Background

Asphalt pavement is always the first choice for the viaduct pavement due to the superior performances of low noise, high stability, driving comfort and the like. In the constructed elevated asphalt surface course in China, most bridge decks generate various water damage damages in the early stage, and from the perspective of water prevention and drainage, the compactness of the asphalt layer is not enough, atmospheric precipitation cannot be freely discharged after permeating into the asphalt pavement layer, and thus interlayer water formed in the asphalt surface course is a main factor causing the damage of the bridge deck.

At present, the utility model discloses a chinese utility model patent of bulletin number CN208748512U discloses a bridge drainage system, and the bridge floor top-down of bridge includes pitch layer and concrete layer, and the bridge floor both sides are equipped with the guardrail, and this drainage system includes water drainage tank and drain pipe, water drainage tank is located the bridge floor both sides, and is located between bridge floor and the guardrail, and the water drainage tank bottom is equipped with the mouth in the water, has laid the level and has joined in marriage the metalling below the water drainage tank, and level joins in marriage metalling one end and is connected with the pitch layer, and the drain pipe includes internal diameter pipe and external diameter pipe, and internal diameter pipe diameter is less than the external diameter pipe diameter, and external diameter pipe one end is connected with the level and joins in marriage the metalling other end, and the other end passes the guardrail, and internal diameter pipe.

The external drainage that has adopted the water drainage tank internal diameter pipe to carry out the bridge floor runoff among the above-mentioned technical scheme and rubble layer external diameter pipe carry out asphalt interlaminar capillary water and asphalt mixture limit portion infiltration water and discharge, have improved drainage efficiency, nevertheless have following defect: lay the metalling around water drainage tank for some ponding is followed the metalling and is infiltrated the outside footpath pipe and discharged, this outside footpath pipe and metalling intercommunication, and inside the inside footpath pipe with water drainage tank intercommunication stretched into the outside footpath pipe, and in the in-service use, silt is along with rivers entering metalling, and the granule of fine grain footpath can cause the drain pipe to block up in the metalling along with the washing away of rainwater gets into the outside footpath pipe, and long-term accumulation can cause bridge drainage system to damage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a pitch bridge floor drainage structures, its drainage effect is good, can not cause drainage system to block up.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a drainage structure of an asphalt bridge deck comprises a bridge deck, guardrails arranged at two ends of the bridge deck and an asphalt pavement layer paved on the bridge deck, wherein the upper surface of the asphalt pavement layer is in a micro-arch shape; a drainage pavement layer is laid at the end part of the asphalt pavement layer close to the guardrail; the drainage pavement layer is provided with drainage devices at intervals along the driving direction of the bridge deck; the drainage pavement layer comprises a waterproof layer paved on the bridge deck, a gravel layer paved above the waterproof layer and a permeable layer paved above the gravel layer; the drainage device comprises a drainage hopper arranged in the drainage pavement layer and provided with water permeable holes on the side wall, and a drainage groove which is arranged along the bridge deck towards the lower surface of the bridge deck and communicated with the drainage hopper; the outer side wall of the drainage hopper is wrapped with geotextile.

By adopting the technical scheme, the drainage pavement layer is arranged, so that accumulated water on the bridge deck can be drained quickly, and the accumulated water can flow out along the bridge deck to the direction close to the guardrail due to the micro-arch shape of the bridge deck; the drainage pavement layer is arranged to be beneficial to seeping the flowing accumulated water to the lower part, and then the accumulated water flows to the drainage hopper along the drainage pavement layer and is discharged from the drainage groove. And a part of accumulated water directly flows into the drainage groove from the upper part of the drainage hopper to be drained, so that the drainage efficiency is greatly improved. Is favorable for draining accumulated water of the bridge deck in time and prolongs the service life of the asphalt bridge deck. The side wall of the drainage hopper is provided with the geotextile, so that the drainage hopper is beneficial to reducing the blockage caused by the fine particles entering the drainage hopper when seeper permeates into the drainage hopper. The permeable layer is arranged, so that accumulated water can be rapidly introduced to the lower part of the bridge floor; the arrangement of the crushed stone layer is favorable for seeping accumulated water into the drainage hopper in time; set up the waterproof layer, avoid ponding to permeate to the decking on, cause the decking to damage.

The utility model discloses further set up to, the layer of mating formation of asphalt is including laying waterproof concrete on the decking, laying the bonding waterproof layer in waterproof concrete top, laying the fine grain formula concrete of bonding waterproof layer top, laying the skid resistant top layer in fine grain formula concrete top.

By adopting the technical scheme, the anti-slip surface layer is beneficial to preventing the vehicle from slipping during running; the arrangement of the bonding waterproof layer is beneficial to improving the overall bonding property of the asphalt pavement layer, so that the asphalt pavement layer can form a firm whole and is not easy to crack and shear deformation; fine grain type concrete is arranged, and asphalt with small void ratio is selected to strengthen the compaction of the bridge deck, so that seeper can be prevented from permeating; the waterproof layer is arranged, so that accumulated water is prevented from further permeating the bridge deck to damage the bridge deck; the whole anti-scouring capability of the asphalt pavement layer is strong.

The utility model is further arranged that a filter screen matched with the inner wall of the drainage hopper is arranged in the drainage hopper; the upper end of the filter screen is provided with an installation frame; mounting bars are vertically arranged at two ends of the mounting frame; the top of the drainage hopper is provided with a mounting groove matched with the mounting bar at a position corresponding to the mounting bar.

By adopting the technical scheme, the mounting strip is aligned to the mounting groove and is embedded into the mounting groove, so that the mounting of the filter screen is realized; the filter screen filters the debris that get into the drain fill fast with the inner wall looks adaptation of drain fill, discharges the water drainage tank fast with ponding under the condition that does not influence the drainage, avoids debris to block up the drain pipe.

The utility model is further arranged that the top of the drainage hopper is provided with a grid plate; the lower end face of the grating is provided with a fixing frame attached to the inner wall of the mounting frame.

Through adopting above-mentioned technical scheme, set up the grid board, carry out the prefilter with the debris that ponding mix with, set up fixed frame for the grid block is on the filter screen, is convenient for dismantle and clear up the debris in the filter screen.

The utility model is further arranged that the bottom of the drainage groove is provided with a rainwater hopper; the lower part of the rainwater hopper is communicated with a drain pipe.

Through adopting above-mentioned technical scheme, set up the rainwater fill for ponding in the water drainage tank can discharge fast, increases drainage efficiency.

The utility model is further arranged that the bridge deck is arranged below the drainage groove and is provided with a water storage tank; the end part of the drain pipe, which is far away from the rainwater hopper, is communicated with the inside of the water storage tank.

Through adopting above-mentioned technical scheme, with the water storage box, with the ponding of bridge floor in the water storage box is arranged, be favorable to carrying out recycle, and can not lead to the ponding of drain pipe to flow down along the bridge and lead to the bridge to breed the moss.

The utility model is further arranged that a waterproof layer is laid between the guardrail and the bridge deck; and the joint surface of the asphalt pavement layer and the drainage pavement layer is provided with a bonding waterproof layer.

Through adopting above-mentioned technical scheme, set up the waterproof layer, avoid ponding infiltration drainage layer of mating formation to cause the damage to being connected of guardrail and decking, prevent effectively that the ponding of infiltration from permeating reinforced concrete structure again in, playing the guard action to concrete structure. The joint surface of the asphalt pavement layer and the drainage pavement layer is provided with the bonding waterproof layer, so that the bridge deck forms a whole and is not easy to split.

The utility model discloses further set up to, the upper surface on drainage layer of mating formation sets up to a lopsidedness that is close to the guardrail along one side that is close to pitch layer of mating formation, and the upper surface on drainage layer of mating formation is higher than one side that the upper surface on drainage layer of mating formation is close to the guardrail.

Through adopting above-mentioned technical scheme, lay the slope of layer and set up the drainage, be favorable to quick the layer of laying the drainage asphalt pavement of ponding fast for ponding can be followed drainage layer infiltration drainage fill of laying a pavement, and another part is discharged from the top of drainage fill, and two kinds of ways make drainage efficiency higher.

To sum up, the utility model discloses a beneficial technological effect does:

1. set up the drainage layer of mating formation, be favorable to discharging ponding on the bridge floor very fast, because the bridge floor is little hunch form, ponding can flow to the direction of being close to the guardrail along the bridge floor, set up the drainage layer of mating formation and be favorable to permeating the below with the ponding that comes, paves the laminar flow along the drainage again and to the drain fill, discharges from the water drainage tank, and some ponding is direct to flow in the water drainage tank from the top of drain fill and discharges, has improved drainage efficiency greatly. The accumulated water on the bridge deck can be discharged in time, and the service life of the asphalt bridge deck is prolonged;

2. the water storage tank is used for discharging accumulated water on the bridge floor into the water storage tank, so that the water storage tank is favorable for recycling, and the accumulated water of the water discharge pipe cannot flow down along the bridge to cause the bridge to grow green moss;

3. set up the waterproof layer, avoid ponding infiltration drainage layer of mating formation to cause the damage to being connected of guardrail and decking, prevent effectively that the ponding of infiltration from permeating reinforced concrete structure again in, playing the guard action to concrete structure.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is an enlarged schematic view of A of FIG. 1;

FIG. 3 is an enlarged schematic view of B of FIG. 1;

FIG. 4 is a schematic structural view of a drain device according to an embodiment;

fig. 5 is an enlarged schematic view of C in fig. 4.

Reference numerals: 1. a bridge deck; 11. a guardrail; 12. a bridge pier; 2. an asphalt pavement layer; 21. waterproof concrete; 22. bonding a waterproof layer; 23. fine grain concrete; 24. an anti-slip surface layer; 3. a drainage pavement layer; 31. a waterproof layer; 32. a crushed stone layer; 33. a water permeable layer; 34. a drainage device; 341. a drainage hopper; 342. a water discharge tank; 343. geotextile; 344. a drain pipe; 345. mounting grooves; 35. filtering with a screen; 351. installing a frame; 352. mounting a bar; 36. a grid; 361. a fixing frame; 4. a rainwater hopper; 5. a water storage tank; 51. and a box cover.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, an asphalt bridge deck drainage structure includes a bridge deck 1, guardrails 11 poured on two ends of the bridge deck 1, piers 12 fixed on the lower end of the bridge deck 1, an asphalt pavement layer 2 laid on the bridge deck 1, and a drainage pavement layer 3 laid on the bridge deck 1 and attached to the guardrails 11. The drainage mat layer 3 is recessed downward along the length direction and near the two sides of the drainage hopper 341. A plurality of adjacent drain pipes 344 are connected to the same pipe and then to the reservoir 5. The water storage tank 5 is arranged at the bottom of the bridge deck 1, which is positioned below the drainage groove 342 and is close to the pier 12, and the tank cover 51 of the water storage tank 5 is detachably connected with the water storage tank 5, so that collected water in the water storage tank 5 can be conveniently taken out for recycling. The end of the drain pipe 344 remote from the rain water scoop 4 communicates with the interior of the reservoir 5. The upper surface of the asphalt pavement layer 2 is in a micro arch shape.

As shown in fig. 2, the asphalt pavement layer 2 includes waterproof concrete 21 laid on the bridge deck 1, an adhesive waterproof layer 22 laid over the waterproof concrete 21, fine-grained concrete 23 laid over the adhesive waterproof layer 22, and an anti-skid surface layer 24 laid over the fine-grained concrete 23. A bonding waterproof layer 22 is laid between the side face of the guardrail 11 close to the bridge deck 1 and the position of the upper surface of the bridge deck 1 close to the guardrail 11, the bonding waterproof layer 22 is laid on the joint face of the asphalt pavement layer 2 and the drainage pavement layer 3 in an inclined manner, and the upper surface of the bonding waterproof layer 22 is flush with the lower surface of the fine grain type concrete 23, so that a small amount of accumulated water permeating into the asphalt pavement layer 2 can flow into the drainage pavement layer 3 along the arch face of the asphalt pavement layer 2, and then flows into the drainage hopper 341. The bonding waterproof layer 22 adopts SBS modified asphalt, which can play the role of both the waterproof layer 31 and the bonding layer.

As shown in fig. 3, the drainage mat layer 3 includes a waterproof layer 31 laid on the bridge deck 1, a gravel layer 32 laid above the waterproof layer 31, and a water-permeable layer 33 laid above the gravel layer 32. In order to facilitate rapid infiltration of standing water into the drain funnel 341, the porosity of the crushed stone layer 32 is preferably greater than 20%.

As shown in fig. 4, the drainage mat 3 is provided with drainage devices 34 at intervals along the running direction of the bridge deck 1. The drainage device 34 includes a drainage funnel 341 disposed in the drainage pavement layer 3 and having a plurality of water permeable holes in a position above the side wall, and a drainage groove 342 disposed along the upper surface of the bridge deck 1 toward the lower surface of the bridge deck 1 and communicating with the drainage funnel 341. The outer side wall of the drain hopper 341 is wrapped with geotextile 343. The upper surface of drainage pavement layer 3 sets up along one side that is close to bituminous paving layer 2 to the slope of one side that is close to guardrail 11, and the upper surface of drainage pavement layer 3 is higher than the one side that drainage pavement layer 3's upper surface is close to guardrail 11 on one side that bituminous paving layer 2 is close to.

Referring to fig. 5, the filter screen 35 adapted to the inner wall of the drain hopper 341 is installed in the drain hopper 341, the mounting frame 351 is formed at the upper end of the filter screen 35, the mounting frame 351 is vertically welded to the lower end faces at the two ends of the mounting frame 351, the mounting groove 345 adapted to the mounting bar 352 is formed in the position, corresponding to the mounting bar 352, at the top of the drain hopper 341, and the mounting bar 352 is directly embedded into the mounting groove 345 for installation, so that the filter screen 35 can be suspended.

The top of the drain funnel 341 is provided with a grid 36 plate, and the lower end surface of the grid 36 is welded with a fixing frame 361 jointed with the inner wall of the mounting frame 351. The grill 36 is covered over the drain funnel 341 so that the outer side of the fixing frame 361 is attached to the inner side of the mounting frame 351.

The rainwater hopper 4 is installed at the bottom of the drainage groove 342, the lower part of the rainwater hopper 4 is communicated with the drainage pipe 344, and the drainage pipe 344 vertically penetrates through the bridge deck 1 to the bottom of the bridge deck 1.

A section of the drain pipe 344 located outside the bridge deck 1 is vertically disposed downward along the pier 12, and the drain pipe 344 is fixed to a position corresponding to the pier 12 by a clip.

When this embodiment is in use, when there is ponding on the bridge floor, because the arch shape of bituminous paving layer 2 for ponding flows to drainage pavement layer 3 along bituminous paving layer 2. Because the surface of the drainage pavement layer 3 is the permeable layer 33 made of permeable material, and the crushed stone layer 32 in the drainage pavement layer 3 has large permeability, the accumulated water can quickly permeate into the drainage hopper 341. The drainage pavement layer 3 is upwardly convex in an arch shape at the middle position between two adjacent drainage hoppers 341, so that accumulated water which does not permeate into the drainage hoppers 341 quickly enters from the inlets of the drainage hoppers 341. Because the asphalt pavement layer 2 and the drainage pavement layer 3 are connected by the bonding waterproof layer 22, the accumulated water is not easy to enter the asphalt pavement layer 2 under the infiltration of the accumulated water, and the normal use of the asphalt pavement layer 2 is influenced. In addition, the micro arch shape of the asphalt pavement layer 2 ensures that a part of accumulated water can timely permeate into the asphalt pavement layer 2 and can also flow into the drainage pavement layer 3.

The accumulated water entering the drainage hopper 341 passes through the geotextile 343 and the filter screen 35, so that the drainage system is not easily blocked by sundries. Under the action of the rainwater hopper 4, the accumulated water in the drainage groove 342 is quickly drained into the water storage tank 5 for recycling. Draw the drainage of bridge floor edge earlier in the drainage layer of mating formation 3, under the condition that does not influence the use of bridge floor and guarantee the intensity of bridge floor, can discharge the ponding of bridge floor fast, drainage efficiency is high, and the durability of bridge floor is strong.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a pitch bridge floor drainage structures, includes decking (1), locates guardrail (11) at decking (1) both ends, lays asphalt pavement layer (2) on decking (1), characterized by: the upper surface of the asphalt pavement layer (2) is in a micro arch shape; a drainage pavement layer (3) is laid at the end part of the asphalt pavement layer (2) close to the guardrail (11); the drainage pavement layer (3) is provided with drainage devices (34) at intervals along the travelling direction of the bridge deck (1); the drainage pavement layer (3) comprises a waterproof layer (31) paved on the bridge deck (1), a gravel layer (32) paved above the waterproof layer (31), and a permeable layer (33) paved above the gravel layer (32); the drainage device (34) comprises a drainage hopper (341) which is arranged in the drainage pavement layer (3) and provided with water permeable holes on the side wall, and a drainage groove (342) which is arranged along the bridge deck (1) to the lower surface of the bridge deck (1) and communicated with the drainage hopper (341); the outer side wall of the drainage hopper (341) is wrapped with geotextile (343).

2. A drainage structure for asphalt bridge deck according to claim 1, wherein: the asphalt pavement layer (2) comprises waterproof concrete (21) paved on the bridge deck (1), a bonding waterproof layer (22) paved above the waterproof concrete (21), fine grain concrete (23) paved above the bonding waterproof layer (22), and an anti-slip surface layer (24) paved above the fine grain concrete (23).

3. A drainage structure for asphalt bridge deck according to claim 1, wherein: a filter screen (35) matched with the inner wall of the drainage hopper (341) is arranged in the drainage hopper (341); the upper end of the filter screen (35) is provided with an installation frame (351); mounting bars (352) are vertically arranged at two ends of the mounting frame (351); the top of the drainage hopper (341) is provided with a mounting groove (345) matched with the mounting strip (352) at a position corresponding to the mounting strip (352).

4. A drainage structure for asphalt bridge deck according to claim 1, wherein: the top of the drainage hopper (341) is provided with a grating (36) plate; and a fixing frame (361) attached to the inner wall of the mounting frame (351) is arranged on the lower end face of the grating (36).

5. A drainage structure for asphalt bridge deck according to claim 1, wherein: a rainwater hopper (4) is arranged at the bottom of the drainage groove (342); the lower part of the rainwater hopper (4) is communicated with a drain pipe (344).

6. An asphalt bridge deck drainage structure as defined in claim 5, wherein: a water storage tank (5) is arranged below the drainage groove (342) of the bridge deck (1); the end part of the drain pipe (344) far away from the rainwater hopper (4) is communicated with the inside of the water storage tank (5).

7. A drainage structure for asphalt bridge deck according to claim 1, wherein: a waterproof layer (31) is laid between the guardrail (11) and the bridge deck (1); and a bonding waterproof layer (22) is arranged on the joint surface of the asphalt pavement layer (2) and the drainage pavement layer (3).

8. A drainage structure for asphalt bridge deck according to claim 1, wherein: the upper surface of drainage pavement layer (3) sets up to one side slope that is close to guardrail (11) along one side that is close to asphalt pavement layer (2), and the upper surface of drainage pavement layer (3) is higher than one side that the upper surface of drainage pavement layer (3) is close to guardrail (11) near one side of asphalt pavement layer (2).