CN215668996U

CN215668996U - Bridge expansion joint drainage structure suitable for water permeability road surface

Info

Publication number: CN215668996U
Application number: CN202121038296.8U
Authority: CN
Inventors: 陶辉; 朱俭锋; 王金国; 刘冬冬
Original assignee: Shanghai Lintongyan Liguohao Civil Engineering Consulting Co ltd
Current assignee: Shanghai Lintongyan Liguohao Civil Engineering Consulting Co ltd
Priority date: 2021-05-15
Filing date: 2021-05-15
Publication date: 2022-01-28
Anticipated expiration: 2031-05-15

Abstract

The utility model belongs to the technical field of road and bridge facilities, and particularly relates to a bridge expansion joint drainage structure suitable for a water permeable pavement. This drainage structure includes: the transverse drainage pipes are arranged at two sides of the bridge expansion joint; a plurality of longitudinal water drainage pipes are arranged between the two transverse water drainage pipes; the longitudinal water drainage pipes are connected by expansion joints at the positions of the expansion joints; the longitudinal pipe is communicated with the two transverse pipes; two ends of the two transverse pipes are respectively communicated with the water collecting well; the expansion joint drainage structure is arranged in the concrete pavement layer; rainwater in the upstream permeable asphalt layer can be introduced into the transverse pipes and then the plurality of longitudinal pipes, the water is discharged into the downstream transverse pipes after being divided into the longitudinal pipes, and finally the water is discharged into the water collecting well and introduced into a ground drainage system. This bridge expansion joint structure is indulged, horizontal drainage channel in the inside formation of expansion joint, can effectively solve the problem of blocking water and the near ponding problem of expansion joint of bridge expansion joint in permeable pavement, improves the travelling comfort of driving, reduces the probability that takes place the traffic accident.

Description

Bridge expansion joint drainage structure suitable for water permeability road surface

Technical Field

The utility model belongs to the technical field of road and bridge facilities, and particularly relates to a drainage structure for a bridge expansion joint.

Background

Bridge expansion joints are very important auxiliary facilities of bridge structures and are used for adjusting bridge deck displacement of bridges caused by vehicle load and temperature change so as to adapt to stable passing of bridge load. An expansion joint is generally arranged at about 120m on an urban viaduct to meet the requirement of bridge displacement. The water permeable pavement adopts a porous structure and has the characteristics of drainage, noise reduction, no water mist during driving, good skid resistance and the like; the method has been successfully applied to a plurality of road and bridge projects in the century, and particularly widely applied to urban overhead express ways in recent years. The urban elevated bridge is paved with permeable pavement, and the rainwater on the pavement is mainly discharged into the centralized drainage facility at the roadside through two modes of rainwater infiltration, internal pore seepage and road surface runoff. The seepage path inside the road surface is mainly related to the longitudinal slope and the transverse slope of the bridge surface and presents the plane flow characteristic. The existing bridge expansion joint is an internal impervious structure, the permeable pavement is divided on a plane, the internal seepage of the permeable pavement is blocked, and the problems of water burst in rain at two sides of the bridge expansion joint, water accumulation on a road after rain and the like are caused, so that the driving safety and the comfort are influenced as shown in figure 1.

Disclosure of Invention

Aiming at the actual problems of the bridge expansion joint in the permeable pavement, the utility model aims to provide a novel drainage structure of the bridge expansion joint, wherein longitudinal and transverse drainage channels are formed in the expansion joint so as to solve the problems of water blocking of the bridge expansion joint in the permeable pavement and water accumulation near the expansion joint.

The utility model provides a drainage structure for a bridge expansion joint, which is an improvement on the existing bridge expansion joint structure, and particularly arranges transverse (relative to the width direction of the bridge and basically parallel to the expansion joint) drainage pipes on two sides of the existing bridge expansion joint respectively; a certain distance is reserved between the two transverse drainage pipes, and a plurality of longitudinal drainage pipes (which are basically vertical to the expansion joint relative to the length direction of the bridge) are arranged;

two sections of longitudinal drainage pipes corresponding to the two sides of the expansion joint are connected by an inverted siphon expansion joint at the position of the expansion joint; the outer ends of the longitudinal water drainage pipes are respectively communicated with the two transverse water drainage pipes; two ends of the two transverse drainage pipes are respectively communicated with the water collecting well; see fig. 2, 3;

the two transverse drain pipes and the plurality of longitudinal transverse drain pipes are arranged in a concrete pavement layer of the bridge expansion joint.

The utility model designs a drainage structure for a bridge expansion joint, which is characterized in that rainwater in an upstream permeable asphalt layer is introduced into a transverse drainage pipe, then enters a plurality of longitudinal drainage pipes at the bottom of the transverse drainage pipe, and is discharged into a downstream transverse pipe after the water is divided into the longitudinal drainage pipes, and finally is discharged into a water collecting well and introduced into a ground drainage system.

The bridge expansion joint drainage structure designed by the utility model optimizes the reserved expansion joint gap, generally, the gap is not less than 8cm, so that an expansion joint of a longitudinal pipe can be conveniently arranged; for the prefabricated main beam, the embedded position of the longitudinal pipe is synchronously considered, and the embedded steel bars of the expansion joint are used for avoiding the longitudinal drain pipe; the thickness of the cast-in-place concrete pavement layer is not less than 100mm, so that enough space is provided for arranging the drain pipe; in addition, a group of water collecting wells are additionally arranged at the downstream for discharging rainwater from the upstream longitudinal drainage pipe and rainwater from the downstream longitudinal drainage pipe.

The utility model relates to a bridge expansion joint drainage structure, which mainly comprises the following components: the transverse drain pipe can be a rectangular steel pipe, the longitudinal drain pipe can be an inverted siphon round steel pipe, and accessories of the transverse drain pipe comprise an expansion joint in an expansion joint, a pre-embedded steel pipe, a connecting piece between concrete, a drainage filter screen and the like.

The construction operation is as follows:

the longitudinal and transverse steel pipes are prefabricated in a factory and comprise steel connecting pieces and drain holes which are connected with concrete. Pre-embedding is carried out after the construction of the main beam is finished, steel pipes are fixed on the concrete pavement layer through steel connecting pieces, and the longitudinal pipes corresponding to the two sides of the expansion joint are connected through expansion joints; then installing the expansion joint part, and adopting steel fiber concrete as a post-cast strip; and a filter screen is arranged on the water outlet to prevent the holes from being blocked when the asphalt is paved. And finally paving asphalt on two sides to ensure that the top surface of the transverse drain pipe is provided with an asphalt layer not less than 4 cm.

The drainage structure for the bridge expansion joint, which is designed by the utility model, forms the longitudinal and transverse drainage channels in the expansion joint, and can effectively solve the problems of water blocking of the bridge expansion joint in a permeable pavement and water accumulation near the expansion joint. The travelling comfort of the bridge is improved, the probability of traffic accidents is reduced, and the workload of bridge engineering maintenance is reduced.

Drawings

Fig. 1 is a schematic view of water blocking of a permeable pavement by a conventional bridge expansion joint.

FIG. 2 is a schematic sectional view of a drainage structure for a bridge expansion joint according to the present invention.

Fig. 3 is a schematic plan view of a drainage structure for bridge expansion joints according to the present invention.

Reference numbers in the figures: the expansion joint comprises a bridge expansion joint 1, a transverse drainage pipe 2, a longitudinal drainage pipe 3, an expansion joint 4, expansion joint water stop rubber 5, a drainage hole 6 in the transverse drainage pipe, a concrete pavement layer 7, expansion joint concrete 8, a concrete beam 9, an OGFC (one glass fiber reinforced plastics) water permeable asphalt layer 10, a lower asphalt layer AC-20 11 and a water collecting well 12.

Detailed Description

The utility model is additionally provided with a transverse drain pipe, a longitudinal drain pipe and accessories thereof, wherein the structures comprise a transverse rectangular steel pipe, a longitudinal inverted siphon round steel pipe, an in-seam expansion joint, a connecting piece between an embedded steel pipe and concrete and a drainage filter screen, and the structures are shown in figures 2 and 3.

The longitudinal and transverse steel pipes are prefabricated in a steel structure factory, and comprise steel connecting pieces and drain holes, wherein the steel connecting pieces and the drain holes are made of concrete, finished products are purchased through the telescopic joints in the joints according to sizes, and finished products are purchased through the drainage filter screen.

The expansion joint is installed after the construction of the main beam is completed, the surface of the plate beam is cleaned, the longitudinal and transverse pipes are embedded and fixed, the bridge deck is poured and paved, the longitudinal pipes on the two sides are connected by adopting expansion joints after the concrete curing is completed, then the expansion joint part is installed, and the post-cast strip adopts steel fiber concrete; after maintenance is finished, garbage in the longitudinal and transverse steel pipes is cleaned, the filter screen is arranged at the water outlet, so that the asphalt pavement is prevented from being blocked, and the top surface of the transverse drain pipe is ensured to have an asphalt layer not smaller than 4cm when the asphalt pavements on two sides are paved. Finally, a water shut-off test was performed.

As an example, the data of the pipe size, the pitch, etc. are as follows: the expansion joint width is greater than 60mm, the size of horizontal rectangle steel pipe: the width is 100mm, and the height is 50mm, and vertical rainbow circular steel tube diameter is 60mm, and the vertical rainbow circular steel tube length of falling of expansion joint both sides is 500mm respectively, and two adjacent vertical rainbow circular steel tube intervals are 3000 mm. The bridge expansion joint drainage structure designed like this forms vertical and horizontal drainage channels, and can effectively solve the problem of blocking water of the bridge expansion joint in the permeable pavement and the problem of ponding near the expansion joint.

Claims

1. A bridge expansion joint drainage structure suitable for water permeable pavements is an improvement on the existing bridge expansion joint structure, and is characterized in that two sides of the existing bridge expansion joint are respectively provided with a transverse drainage pipe; a certain distance is reserved between the two transverse water drainage pipes, and a plurality of longitudinal water drainage pipes are arranged;

two sections of longitudinal drainage pipes corresponding to the two sides of the expansion joint are connected by an inverted siphon expansion joint at the position of the expansion joint; the outer ends of the longitudinal water drainage pipes are respectively communicated with the two transverse water drainage pipes; two ends of the two transverse drainage pipes are respectively communicated with the water collecting well;

2. The drainage structure for the expansion joint of the bridge as claimed in claim 1, wherein the rainwater in the upstream permeable asphalt layer is introduced into the transverse drainage pipe, then enters the plurality of longitudinal drainage pipes at the bottom of the transverse drainage pipe, and is discharged into the downstream transverse pipe after being divided into the longitudinal drainage pipes, and finally is discharged into the sump and introduced into the ground drainage system.

3. The drainage structure for bridge expansion joints according to claim 1, wherein the transverse drainage pipe is a rectangular steel pipe, and the longitudinal drainage pipe is an inverted siphon round steel pipe.