CN210529482U

CN210529482U - Bridge expansion joint drainage structures

Info

Publication number: CN210529482U
Application number: CN201921189576.1U
Authority: CN
Inventors: 洪彭文; 左玉强
Original assignee: Hefei Dongfang Transportation Planning And Design Institute Co Ltd
Current assignee: Hefei Dongfang Transportation Planning And Design Institute Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-05-15
Anticipated expiration: 2029-07-25

Abstract

The utility model relates to the technical field of bridge waterproofing, and discloses a bridge expansion joint drainage structure, which comprises a drainage groove arranged on a bridge deck cast-in-situ layer and close to a telescopic device groove, and a drainage pipe arranged at the bottom of the drainage groove, wherein the bridge deck cast-in-situ layer is paved with a first reinforcing mesh layer at the drainage groove; an asphalt concrete layer is laid above the bridge floor cast-in-place layer; the drainage channel is filled with sand-free concrete; two sides of the drainage notch are provided with catchment slopes with 5% gradient; a first waterproof layer is laid at the position where the asphalt concrete layer is connected with the telescopic device groove; and a grid cover is arranged at the notch of the drainage groove. The utility model has the advantages of it is following and effect: it can carry out the drainage to bridge expansion joint department effectively.

Description

Bridge expansion joint drainage structures

Technical Field

The utility model relates to a waterproof technical field of bridge, in particular to flexible seam drainage structures of bridge.

Background

Bridge expansion joints, which are meant to satisfy the requirements of deck deformation, are usually provided between two beam ends, between a beam end and an abutment, or at the hinge joint of a bridge. The expansion joint is required to be freely telescopic in two directions parallel to and perpendicular to the axis of the bridge, and the expansion joint is firm and reliable, and when a vehicle runs, the vehicle is smooth and free of sudden jump and noise; the rainwater and garbage soil can be prevented from infiltration and blocking; the installation, the inspection, the maintenance and the dirt elimination are all simple and convenient. At the position of the expansion joint, the handrail and the bridge deck pavement are disconnected.

In the prior art, due to the special constructability of the expansion joint, the broken joint is formed at the bridge floor, so that rainwater cannot be effectively discharged into a bridge floor drainage facility through a road longitudinal slope under the condition of heavy rain, accumulated water is gathered at the expansion joint, the bridge floor driving comfort is influenced, partial accumulated water is caused to seep downwards through an asphalt pavement for a long time, the expansion joint device and the bridge floor pavement are damaged, and the bridge structure safety is further influenced.

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 flexible seam drainage structures of bridge, it can be effectively to the drainage of bridge expansion joint department.

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

a drainage structure for a bridge expansion joint comprises a drainage groove and a drainage pipe, wherein the drainage groove is formed in a bridge deck cast-in-situ layer and is close to a telescopic device groove, the drainage pipe is arranged at the bottom of the drainage groove, and a first reinforcing mesh layer is paved at the drainage groove of the bridge deck cast-in-situ layer; an asphalt concrete layer is laid above the bridge floor cast-in-place layer; the drainage channel is filled with sand-free concrete; two sides of the drainage notch are provided with catchment slopes with 5% gradient; a first waterproof layer is laid at the position where the asphalt concrete layer is connected with the telescopic device groove; and a grid cover is arranged at the notch of the drainage groove.

Through adopting above-mentioned technical scheme, reserve the notch of water drainage tank in the position department of being close to the telescoping device groove, can introduce the water drainage tank with the ponding of bituminous paving infiltration and discharge, reduce the structure of ponding to expansion joint department and lead to destroying to the life of extension bridge structures. At the lowest point department of cross bridge to the cross slope, be located the uphill direction at the expansion joint, the drainage tank that forms is reserved when the cast-in-place layer of bridge floor is pour, pre-buried PVC drain pipe in the below of drainage tank, and wear out from the bridge bottom, set up the catchment slope that the slope is 5% when cast in situ concrete, make the infiltration enter into asphalt concrete layer's ponding can flow in the drainage tank along catchment slope and discharge, backfill C20 no sand concrete in the drainage tank, at last the pre-buried grid lid of notch department at drainage tank, finally with ponding drainage to the bridge bottom, this drainage structures also can be suitably encrypted according to the bridge width. The sand-free concrete is backfilled to prevent the sinking and collapse of the pavement, and meanwhile, the pores in the sand-free concrete are large, so that the heat transfer performance is low, the water permeability is good, and the drainage performance of the drainage tank is not influenced. The main difference between the sand-free concrete and the common concrete is that no fine aggregate is used, only coarse aggregate is used, and cement is used for covering the surface of the coarse aggregate and performing cementation rather than filling gaps. The first reinforcing mesh layer is paved at the position, located in the drainage groove, of the bridge deck cast-in-place layer, so that the stability of a concrete structure is enhanced, the condition that the concrete cracks around the concrete after grooving is effectively reduced, the quality of the bridge deck cast-in-place layer is improved, and the service life of a bridge is prolonged. The first waterproof layer is arranged at the position where the asphalt concrete layer is connected with the expansion device groove, so that accumulated water which permeates into the asphalt concrete is prevented from permeating into the expansion device groove, and the waterproof capacity of the expansion joint is improved.

The utility model is further provided with that the drainage groove is provided with a placing groove near the notch and extending to the direction departing from the drainage groove; the grid cover is arranged in the placing groove.

Through adopting above-mentioned technical scheme, set up the standing groove, when preventing to pour concrete, the grid lid prevents the off tracking for the installation of grid lid is more stable, and the cast-in-place layer department of bridge floor fluting increases the grid lid that has certain rigidity, thereby makes the overall structure of decking more firm, can also effectively block in the infiltration water drainage tank when asphalt concrete pours.

The utility model discloses further set up to, in the standing groove and the upper and lower below that is located the grid lid respectively be equipped with the first geotechnological cloth of one deck.

Through adopting above-mentioned technical scheme, set up first geotechnological cloth, prevent that the fine grain in the asphalt concrete layer from scouring off under ponding, also can prevent to take place to block up in the drain pipe. The fabric is placed in the asphalt concrete layer to facilitate water absorption, and accumulated water can be further quickly introduced into the drainage groove to be drained.

The utility model is further arranged that a second waterproof layer is arranged between the asphalt concrete layer and the bridge floor cast-in-place layer; the second waterproof layer covers the notch of the drainage groove and the surfaces of the catchment slopes on the two sides of the drainage groove.

Through adopting above-mentioned technical scheme, set up the second waterproof layer, be favorable to reducing ponding further infiltration entering bridge internal, can strengthen the waterproof ability of the cast-in-place layer upper surface of bridge floor for ponding can discharge in getting into the water drainage tank along catchment slope, protects bridge structures.

The utility model is further arranged that the first waterproof layer and the second waterproof layer are both bonding waterproof layers; the bonding waterproof layer adopts SBS modified asphalt.

By adopting the technical scheme, the SBS belongs to a styrene thermoplastic elastomer and is a styrene-butadiene-styrene triblock copolymer. The SBS modified asphalt is prepared by taking base asphalt as a raw material, adding a certain proportion of SBS modifier, uniformly dispersing SBS in the asphalt by methods of shearing, stirring and the like, simultaneously adding a certain proportion of special stabilizer to form SBS blending material, and modifying the asphalt by utilizing good physical properties of SBS. The high-temperature-resistant and low-temperature-resistant adhesive has good high-temperature-resistant and low-temperature-resistant capabilities in regions with large temperature difference, good anti-rutting capability, good elasticity and toughness and particularly strong bonding capability. Between cast-in-place layer of bridge floor and asphalt concrete layer to and asphalt concrete layer and telescoping device groove department all must have good adhesion, reduce the lapse between the road surface, avoid the bridge floor to produce crack scheduling problem, the bonding waterproof layer makes each layer can form firm whole, combined action when guaranteeing load effect or temperature variation, prevent effectively that the water of infiltration from infiltrating reinforced concrete structure again in, play fine guard action to concrete structure.

The utility model discloses further set up to, first reinforcing bar net below is mated formation has one deck second reinforcing bar net.

Through adopting above-mentioned technical scheme, in order to further improve cast-in-place concrete layer's intensity, lay the second reinforcing bar net in the below of first reinforcing bar net, because the first reinforcing bar net of laying at water drainage tank department can break off the setting when meetting water drainage tank, the reinforcing bar net is established in the booklet benefit under the department of breaking off to guarantee that the first reinforcing bar net of the cast-in-place layer of continuity bridge floor of structure should extend to telescoping device inslot, make the overall structure of bridge more firm.

The utility model discloses further set up to, one deck second geotechnological cloth has been laid to the tank bottom of water drainage tank.

Through adopting above-mentioned technical scheme, lay the second geotechnological cloth, further strengthen the effect of preventing blockking up of drain pipe department for the drainage is more smooth and easy.

The utility model discloses further set up to, the cast-in-place layer of bridge floor adopts waterproof concrete placement.

Through adopting above-mentioned technical scheme, use waterproof concrete, can further strengthen prevention of seepage water effect, guarantee that the structure of pontic is not corroded away by ponding, can also guide the ponding of infiltration road surface inside to the water drainage tank effectively for drainage effect is better.

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

1. the notch of the drainage groove is reserved at the position close to the expansion device groove, accumulated water seeped downwards from an asphalt pavement can be introduced into the drainage groove to be drained, and damage to the structure at the expansion joint caused by the accumulated water is reduced, so that the service life of the bridge structure is prolonged;

2. the non-sand concrete is backfilled to prevent the sinking and collapse of the pavement, and meanwhile, the non-sand concrete has large pores, so that the heat transfer performance is low, the water permeability is good, and the drainage performance of the drainage tank is not influenced;

3. between cast-in-place layer of bridge floor and asphalt concrete layer to and asphalt concrete layer and telescoping device groove department all must have good adhesion, reduce the lapse between the road surface, avoid the bridge floor to produce crack scheduling problem, the bonding waterproof layer makes each layer can form firm whole, combined action when guaranteeing load effect or temperature variation, prevent effectively that the water of infiltration from infiltrating to reinforced concrete structure again in, play fine guard action to concrete structure.

Drawings

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

fig. 2 is a schematic view of the structure of the drain tank of the embodiment.

Reference numerals: 1. a bridge body; 11. a bridge deck cast-in-place layer; 111. a second waterproof layer; 112. a first reinforcing mesh; 113. a second reinforcing mesh; 12. an asphalt concrete layer; 13. a first waterproof layer; 2. a water discharge tank; 21. a placement groove; 22. a grid cover; 23. a first geotextile; 24. a second geotextile; 3. a telescoping device slot; 4. a drain pipe; 5. a water catchment slope.

Detailed Description

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

As shown in figure 1, the drainage structure for the bridge expansion joint comprises a drainage groove 2 reserved on a bridge deck cast-in-situ layer 11 and close to a telescopic device groove 3, and a drainage pipe 4 reserved at the bottom of the drainage groove 2. An asphalt concrete layer 12 is paved above the bridge floor cast-in-place layer 11, and after the asphalt concrete layer 12 is paved, a telescopic device groove 3 is arranged along the width direction of the bridge body 1. During construction, the drain pipe 4 is covered with a stainless steel wire net and fixed by a cement nail.

The bridge floor cast-in-place layer 11 is cast to a layer of foundation concrete layer cast on the bridge body 1 in a cast-in-place mode, and the bridge floor cast-in-place layer 11 is cast by waterproof concrete. When the bridge deck cast-in-place layer 11 is poured, a first mesh reinforcement 112 is paved in the bridge deck cast-in-place layer 11 and at the position of the drainage groove 2, and a second mesh reinforcement 113 is paved in the bridge deck cast-in-place layer 11 and right below the first mesh reinforcement 112. One side of the first mesh reinforcement 112 extends into the retractor slot 3.

As shown in fig. 2, a shallow groove deep placement groove 21 is formed in the drain groove 2 near the groove opening in a direction away from the drain groove 2. The drainage channel 2 is filled with non-sand concrete, and the non-sand concrete cannot be strongly vibrated or tamped during pouring, otherwise, cement paste can be deposited to destroy the uniformity of a concrete structure. Since the non-fine concrete has a lot of pores, is easy to be dried by water, and is quickly dried, early curing is important, and after pouring, the surface of the non-fine concrete is covered with a plastic film and water spraying curing is started. Before the sand-free concrete is poured, a layer of second geotextile 24 is laid at the bottom of the drainage channel 2. After the sand-free concrete is poured, a layer of first geotextile 23 is laid below the placing groove 21, then the grid cover 22 is installed, and finally a layer of first geotextile 23 is laid on the upper surface of the grid cover 22, wherein the upper surface of the first geotextile 23 is flush with the notch of the drainage groove 2.

As shown in fig. 1, when the bridge deck cast-in-place layer 11 is cast in place, catchment slopes 5 with a gradient of 5% are arranged at two sides of the opening of the drainage channel 2, a second waterproof layer 111 is cast on the upper surface of the bridge deck cast-in-place layer 11, and then an asphalt concrete layer 12 is laid. The second waterproof layer 111 covers the opening of the drain tank 2 and the surface of the catchment slope 5 on both sides of the drain tank 2. A first waterproof layer 13 is paved on the asphalt concrete layer 12 and the expansion device groove 3. The first waterproof layer 13 and the second waterproof layer 111 are both bonding waterproof layers, and the bonding waterproof layers are made of SBS modified asphalt.

This embodiment is when using, and at the lowest point department of cross bridge to the cross slope, be located the uphill direction at the expansion joint, the drainage tank 2 that forms is reserved when cast-in-place layer 11 of bridge floor pours, and drainage tank 2 is close to its notch department and has offered standing groove 21 to the direction extension that deviates from drainage tank 2, at the pre-buried PVC drain pipe 4 in drainage tank 2's below to wear out from the bridge bottom. And (3) setting a catchment slope 5 with the slope of 5% when the bridge deck cast-in-place layer 11 is poured, and paving a second reinforcing mesh 113 and a first reinforcing mesh 112 from bottom to top when the bridge deck cast-in-place layer 11 is poured. After the second geotextile 24 is laid at the bottom of the drainage groove 2, C20 sand-free concrete is filled in the drainage groove 2, finally, a layer of first geotextile 23 is laid at the bottom of the placing groove 21, the grid cover 22 is installed, and a layer of first geotextile 23 is laid on the upper surface of the grid cover 22. And finally, paving a second waterproof layer 111 on the upper surface of the bridge floor cast-in-place layer 11, paving an asphalt concrete layer 12, arranging a telescopic device groove 3 along the width direction of the bridge body 1, bonding the joint of the telescopic device groove 3 and the asphalt concrete layer 12 by using a first waterproof layer 13, and finally draining accumulated water to the bottom of the bridge, wherein the drainage structure can also be properly encrypted according to the width of the bridge.

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 bridge expansion joint drainage structures, is including locating on the cast-in-place layer of bridge floor (11) and be close to water drainage tank (2) in telescoping device groove (3), locate drain pipe (4) of the tank bottom of water drainage tank (2), characterized by: a first reinforcing mesh (112) is paved on the bridge deck cast-in-place layer (11) at the drainage groove (2); an asphalt concrete layer (12) is laid above the bridge deck cast-in-place layer (11); the drainage channel (2) is filled with sand-free concrete; two sides of the opening of the drainage channel (2) are provided with catchment slopes (5) with 5% gradient; a first waterproof layer (13) is laid at the junction of the asphalt concrete layer (12) and the telescopic device groove (3); and a grid cover (22) is arranged at the notch of the drainage groove (2).

2. The bridge expansion joint drainage structure of claim 1, wherein: a placing groove (21) is formed in the position, close to the notch, of the drainage groove (2) and extends in the direction departing from the drainage groove (2); the grid cover (22) is arranged in the placing groove (21).

3. The bridge expansion joint drainage structure of claim 2, wherein: a layer of first geotextile (23) is respectively arranged in the placing groove (21) and above and below the grid cover (22).

4. The bridge expansion joint drainage structure of claim 1, wherein: a second waterproof layer (111) is arranged between the asphalt concrete layer (12) and the bridge deck cast-in-place layer (11); the second waterproof layer (111) covers the notch of the drainage groove (2) and the surfaces of the water collection slopes (5) on the two sides of the drainage groove (2).

5. The bridge expansion joint drainage structure of claim 1, wherein: the first waterproof layer (13) and the second waterproof layer (111) are both bonding waterproof layers; the bonding waterproof layer adopts SBS modified asphalt.

6. The bridge expansion joint drainage structure of claim 1, wherein: and a second reinforcing mesh (113) is paved below the first reinforcing mesh (112).

7. The bridge expansion joint drainage structure of claim 1, wherein: and a layer of second geotextile (24) is laid at the bottom of the drainage groove (2).

8. The bridge expansion joint drainage structure of claim 1, wherein: the bridge deck cast-in-place layer (11) is cast by adopting waterproof concrete.