Integrated drainage structure suitable for drainage asphalt pavement bridge expansion joint
By installing an integrated drainage structure consisting of permeable main pipes, branch pipes, and concrete blocks at the bridge expansion joints, the problem of water accumulation at the bridge expansion joints has been solved, achieving efficient drainage and ensuring road stability and driving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional drainage designs cannot effectively remove water accumulation at bridge expansion joints, leading to road surface damage, corrosion, and structural damage, affecting driving safety and comfort.
Design an integrated drainage structure including a permeable main pipe, permeable branch pipes, concrete blocks, and steel reinforcement supports to form longitudinal and transverse drainage channels. The permeable holes are equipped with filter screens, and the permeable main pipe is connected to the bridge deck ditch to ensure effective drainage of accumulated water.
It improves drainage efficiency, reduces road surface damage, enhances driving safety and comfort, and reduces maintenance workload.
Smart Images
Figure CN224092308U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of road drainage technology, specifically relating to an integrated drainage structure suitable for bridge expansion joints in asphalt pavement. Background Technology
[0002] With the acceleration of urbanization, elevated bridges have become important transportation infrastructure. During the construction of elevated bridges, expansion joints are prone to displacement and deformation due to factors such as temperature changes and load effects. This makes expansion joints a major area for rainwater infiltration and accumulation. Especially when the bridge deck uses drainage asphalt pavement, rainwater is more likely to accumulate at the expansion joints, leading to pavement damage, corrosion, and structural damage. In severe cases, this can affect vehicle driving safety and ride comfort.
[0003] Traditional drainage designs typically rely solely on surface drainage systems or drainage systems that collect asphalt at the bridge deck edges. These designs suffer from insufficient drainage, pipe blockage, and maintenance difficulties, failing to effectively address the unique drainage needs at the expansion joints of elevated bridges. In particular, when moisture accumulates along the expansion joints, the lack of an efficient drainage system for timely removal can exacerbate pavement aging, reduce pavement durability, and even cause pavement cracks and structural damage.
[0004] Therefore, developing an integrated drainage device for bridge expansion joints in asphalt pavement that can solve the problem of water accumulation at expansion joints, improve drainage efficiency, and ensure road stability and driving safety has become an urgent technical challenge. Summary of the Invention
[0005] The purpose of this utility model is to provide an integrated drainage structure that is simple in structure, easy to construct, and has good drainage effect, suitable for bridge expansion joints in asphalt pavement, which can ensure driving safety and comfort.
[0006] The integrated drainage structure for bridge expansion joints in drainage asphalt pavement provided by this utility model is set on one side of the bridge expansion joint, located between the bridge deck leveling layer and the bridge expansion joint, and includes a permeable main pipe, permeable branch pipes, concrete blocks and steel reinforcement supports.
[0007] The permeable branch pipe has several branches. One end of the permeable branch pipe is vertically installed on the body of the permeable main pipe and is connected to the permeable main pipe. The other end of the branch pipe has a permeable hole.
[0008] The concrete block is located on one side of the bridge expansion joint, and the steel reinforcement support is embedded in the concrete block and extends towards the bridge deck leveling layer to provide stable support for the concrete block.
[0009] The water permeable main pipe is embedded in a concrete block, fixed on a steel support, and the length of the water permeable main pipe is along the width direction of the bridge pavement; the length of the water permeable branch pipe is along the length direction of the bridge pavement and extends into the bridge pavement layer, and the bridge pavement layer is arranged on the bridge leveling layer.
[0010] One end of the water permeable main pipe is higher than the other end, and the lower end is connected with the bridge side ditch drainage system.
[0011] In the utility model, the filter screen is arranged on the water permeable hole of the water permeable branch pipe to prevent the hole from being blocked during asphalt paving.
[0012] In the utility model, the diameter of the water permeable main pipe is 50mm-100mm.
[0013] In the utility model, the bridge pavement layer is made of drainage asphalt material.
[0014] In the utility model, the water permeable main pipe is a transverse drainage pipe along the width direction of the bridge pavement, serves as the main pipe for drainage at the expansion joint, and is responsible for collecting and guiding the accumulated water in the concrete near the expansion joint.
[0015] The water permeable branch pipe is a longitudinal drainage branch pipe along the length direction of the bridge pavement, serves as the water collecting pipe for collecting the accumulated water in the drainage asphalt of the bridge pavement layer, and the water permeable hole end of the multiple longitudinal branch pipes extends into the bridge pavement layer with drainage asphalt, so that the longitudinal and transverse seepage water can be effectively collected.
[0016] The construction method of the integrated drainage device provided by the utility model comprises the following specific steps:
[0017] The water permeable main pipe and the water permeable branch pipe are prefabricated in a factory, are pre-buried after the main beam construction is completed, and are fixed by the water permeable pipe fixing steel bars; then, the water permeable main pipe is synchronously installed with the steel structure of the expansion joint, the post-pouring belt is made of steel fiber concrete; the water permeable hole end of the longitudinal branch pipe is wrapped with a filter screen to prevent the hole from being blocked during asphalt paving; finally, asphalt paving is performed on both sides to ensure that the end top surface of the drainage branch pipe has an asphalt layer with a thickness of not less than 4cm.
[0018] The integrated structure of the utility model makes the construction and maintenance more convenient, has the advantages of simple structure, high stability, excellent drainage efficiency and strong adaptability, etc. The seepage water in the drainage asphalt pavement is collected into the transverse drainage main pipe through the multiple longitudinal branch pipes, and finally connected to the elevated edge drainage system, so that the road surface damage or damage caused by accumulated water is effectively avoided, and the comfort and safety of driving are ensured. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 The utility model discloses a bridge expansion joint drainage device plane schematic view.
[0020] Figure 2 The utility model discloses a bridge expansion joint drainage device profile schematic view.
[0021] The figure mark: 1 is water -permeable main pipe, 2 is water -permeable branch pipe, 3 is concrete block, 4 is reinforcing support, 5 filter screen, 6 is bridge deck pavement, 7 is bridge deck leveling layer, 8 is expansion joint. DETAILED DESCRIPTION
[0022] The utility model sets up in the expansion joint of bridge one side, is located between bridge deck leveling layer and expansion joint of bridge, including water -permeable main pipe 1, water -permeable branch pipe 2, concrete block 3 and reinforcing support 4, water -permeable main pipe 1 selects Φ80mm specification, and water -permeable branch pipe 2 selects Φ20mm specification.
[0023] Water -permeable branch pipe 1 has several, and the specific design according to bridge deck width, and water -permeable branch pipe 2 one end is vertically arranged in the pipe body of water -permeable main pipe 1 in turn, and the cavity of pipe and the through of water -permeable main pipe 1, and the other end end part pipe body is provided with several water -permeable holes, and filter screen is arranged on water -permeable hole, prevents the hole from being blocked when asphalt paving;
[0024] Concrete block 3 sets up in the expansion joint of bridge one side, and reinforcing support 4 is buried in concrete block 3, and extends to bridge deck leveling layer 7 direction to provide the stable support of concrete block 3;
[0025] Water -permeable main pipe 1 is buried in concrete block 3, and is fixed on reinforcing support 4, and the pipe length of water -permeable main pipe 1 is along the bridge road surface width direction, and the pipe length of water -permeable branch pipe 2 is along the bridge road surface length direction, and extends to bridge deck pavement 6, and bridge deck pavement 6 is set up on bridge deck leveling layer 7, and adopts drainage asphalt material quality, as shown in Figure 1 、 Figure 2 As shown;
[0026] One end of water -permeable main pipe 1 is higher than the other end, and the lower end is connected with bridge side ditch drainage system.
[0027] Water -permeable main pipe, water -permeable branch pipe are all prefabricated in factory, and drainage filter screen is purchased finished product.
[0028] The utility model installs expansion joint in main girder construction after completion, and the surface of plate girder is cleaned, and longitudinal and transverse pipes are pre -buried and adopt water -permeable pipe fixed reinforcement fixed, and bridge deck pavement is poured, and then is installed with expansion joint synchronously, and post -poured zone adopts steel fiber reinforced concrete, and after maintenance is completed, garbage in longitudinal and transverse steel pipes is cleaned, and filter screen is arranged in drainage outlet, prevents asphalt paving from being blocked, and when paving both sides asphalt, it is ensured that the top surface of transverse drainage pipe has asphalt layer not less than 4cm. Finally, closed water test is carried out.
[0029] The bridge expansion joint drainage device forms longitudinal and transverse drainage channels in the expansion joint, can effectively solve the water blocking problem of the bridge expansion joint in the pervious pavement and the water accumulation problem near the expansion joint, improves the comfort of driving, reduces the probability of traffic accidents, and reduces the workload of bridge engineering maintenance.
[0030] Although the above-described methods are illustrated and described as a series of structures for simplicity of explanation, it is to be understood and appreciated that the methods are not limited by the illustrated order, as some structures can occur in different orders and / or concurrently with each other, in accordance with one or more embodiments.
[0031] 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 readily apparent to those skilled in the art, and the generic principles defined herein can 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 is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1. An integrated drainage structure suitable for bridge expansion joints in asphalt pavement, wherein it is installed on one side of the bridge expansion joint, located between the bridge deck leveling layer and the bridge expansion joint, characterized in that: This includes the main permeable pipe, permeable branch pipe, concrete blocks, and steel reinforcement supports; The permeable branch pipe has several branches. One end of the permeable branch pipe is vertically installed on the body of the permeable main pipe and is connected to the permeable main pipe. The other end of the branch pipe has a permeable hole. The concrete block is located on one side of the bridge expansion joint, and the steel reinforcement support is embedded in the concrete block and extends towards the bridge deck leveling layer to provide stable support for the concrete block. The permeable main pipe is embedded in the concrete block and fixed on the steel reinforcement support. The length of the permeable main pipe is along the width of the bridge road surface. The length of the permeable branch pipe is along the length of the bridge road surface and extends into the bridge deck pavement layer, which is set on the bridge deck leveling layer. One end of the permeable main pipe is higher than the other end, and the lower end is connected to the bridge side ditch drainage system.
2. The integrated drainage structure as described in claim 1, characterized in that, The permeable branch pipe is equipped with a filter screen on the permeable hole to prevent the hole from being blocked during asphalt paving.
3. The integrated drainage structure as described in claim 1, characterized in that, The bridge deck pavement is made of drainage asphalt.
4. The integrated drainage structure as described in claim 1, characterized in that, The diameter of the main permeable pipe is 50mm~100mm.