A bridge deck bridge expansion joint part drainage structure

Abstract

This invention provides a drainage structure for bridge expansion joints, relating to the field of bridge engineering technology. The drainage structure for bridge expansion joints includes a base and a shoulder. The upper part of the base is divided into two parts: a cross slope area and a longitudinal slope area. The cross slope area includes a water-stabilized layer on top of the base, a waterproof layer laid on the surface of the water-stabilized layer, and an asphalt layer laid on the surface of the waterproof layer. In this invention, by setting up a template with pre-reserved drainage channels and installing rainwater collection boxes before pouring the expansion joint concrete, and by adding permeable fillers such as crushed stone after construction, a continuous water-conducting channel is formed, consisting of drainage channels, permeable fillers, rainwater collection boxes, and drainage pipes. This effectively solves the problem of drainage obstruction caused by the subsequent concrete interrupting the original drainage channel, achieving effective collection and orderly discharge of water accumulated in the interrupted area, avoiding water accumulation at the expansion joint, and improving the drainage efficiency and structural durability of the bridge expansion joint.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, specifically to a drainage structure for the expansion joint of a bridge deck. Background Technology

[0002] In the construction and maintenance of highway bridges, the design of the road surface drainage system is crucial, directly affecting driving safety and the service life of the bridge structure. To ensure that the bridge deck can quickly drain rainwater, ordinary highways are typically designed with specific cross and longitudinal slopes. This slope design utilizes gravity to allow water falling on the road surface to flow smoothly along the combined direction of the cross and longitudinal slopes towards both sides of the bridge, and finally be collected and discharged from the bridge surface through pre-installed drainage pipes, thus keeping the road surface dry.

[0003] However, in actual construction applications, the drainage system at bridge expansion joints often suffers from significant structural defects. Because the installation and fixing of bridge expansion joints requires concrete structures, the subsequent pouring of concrete during construction often inadvertently blocks the original bridge deck drainage channels due to variations in pouring height and area. This structural obstruction prevents water from flowing smoothly, leading to water accumulation around the concrete of the expansion joint. The long-term retention of this water not only seeps into the concrete cracks but also causes continuous erosion and corrosion of the expansion joint and its foundation structure under vehicle loads, seriously threatening the safety and durability of the bridge structure.

[0004] Therefore, those skilled in the art have provided a drainage structure for the bridge deck expansion joint to solve the problems mentioned in the background art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a drainage structure for the bridge deck expansion joint, which solves the problem of water accumulation around the expansion joint concrete caused by the post-cast concrete cutting off the original bridge deck drainage channel, thereby affecting the structural safety of the bridge.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A drainage structure for a bridge deck expansion joint includes a base and a shoulder. The upper part of the base is divided into two parts, namely a cross slope area and a longitudinal slope area.

[0008] The cross slope zone includes a water-stabilized layer set on the substrate, a waterproof layer laid on the surface of the water-stabilized layer, and an asphalt layer laid on the surface of the waterproof layer.

[0009] The longitudinal slope area includes a connecting layer, which is divided into two by an expansion joint at the upper end of the substrate. A rainwater collection box is provided at the lower end of one of the connecting layers and at the upper end of the substrate. A water-permeable filler is provided on one side of the connecting layer and at the upper end of the rainwater collection box. A drain pipe is connected to the side wall of the rainwater collection box and extends into the expansion joint opened in the middle of the substrate.

[0010] The upper end of the connecting layer is equipped with an expansion joint body. There are two expansion joint bodies, which are located on both sides of the expansion joint gap, respectively.

[0011] The above technical solution effectively solves the problem of drainage obstruction caused by the post-cast concrete cutting off the original drainage channel. By setting up a template with reserved drainage slots and installing rainwater collection boxes before pouring the expansion joint concrete, and adding permeable fillers such as crushed stone after construction, a continuous water guiding channel is formed, consisting of drainage slots, permeable fillers, rainwater collection boxes, and drainage pipes. This achieves effective collection and orderly discharge of water accumulated in the area cut off by the post-cast concrete, avoids water accumulation at the expansion joint, and improves the drainage efficiency and structural durability of the bridge expansion joint.

[0012] Furthermore, the permeable filler is made of permeable gravel, and the lower end face of the permeable filler is connected to the inner cavity of the rainwater collection box to guide the permeated water into the rainwater collection box.

[0013] By utilizing the gaps between the permeable gravel as a rapid water passage channel, the accumulated water can be quickly guided vertically downwards, ensuring that the infiltrated water smoothly enters the rainwater collection box and improving the effectiveness of local drainage capacity.

[0014] Furthermore, the road shoulders are provided on both sides of the base, and a drainage groove is provided at the upper end of the road shoulders;

[0015] The above technical solution pre-designed a special drainage channel on the road shoulder structure, providing a definite discharge outlet for surface water, ensuring the continuity and guidance of the water flow channel, and improving the overall orderliness of drainage.

[0016] Furthermore, the water-stabilized layer, waterproof layer, and asphalt layer are all inclined towards the shoulder to guide surface water towards the shoulder side for discharge.

[0017] Through the above technical solution, the slope design of each structural layer is used to construct gravitational potential energy that guides the direction of water flow. This can actively and continuously push the water accumulated on the road surface to the shoulder side, realize the gravity discharge of water on the road surface, and improve the smoothness of bridge deck drainage.

[0018] Furthermore, the connecting layer is inclined toward the expansion joint to guide infiltrated water into the rainwater collection box for discharge;

[0019] The above technical solution sets a directional slope pointing towards the expansion joint in the seepage layer, which can control the flow direction of the seepage water and make it accurately flow into the rainwater collection box at the expansion joint, realizing the targeted discharge of deep seepage water and improving the targeted drainage of the internal structure.

[0020] This invention provides a drainage structure for the expansion joint of a bridge deck. It offers the following advantages:

[0021] 1. This invention provides a drainage structure for the expansion joint of a bridge. By setting up a template to reserve drainage channels and installing rainwater collection boxes before pouring concrete at the expansion joint, and adding permeable fillers such as crushed stone after construction, a continuous water-conducting channel is formed, consisting of drainage channels, permeable fillers, rainwater collection boxes, and drainage pipes. This effectively solves the problem of drainage obstruction caused by the subsequent pouring of concrete cutting off the original drainage channel, achieving effective collection and orderly discharge of water accumulated in the cut-off area, avoiding water accumulation at the expansion joint, and improving the drainage efficiency and structural durability of the bridge expansion joint. Attached Figure Description

[0022] Figure 1 This is an overall isometric view of the present invention;

[0023] Figure 2 This is an isometric view of the permeable filler and rainwater collection box of the present invention;

[0024] Figure 3 This is a top view of the present invention;

[0025] Figure 4 This is a front view of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Substrate; 2. Water-stabilized layer; 3. Waterproof layer; 4. Asphalt layer; 5. Connecting layer; 6. Expansion joint body; 7. Water-permeable filler; 8. Rainwater collection box; 9. Drainage pipe; 10. Shoulder. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] like Figure 1-4As shown, this embodiment of the invention provides a drainage structure for the expansion joint of a bridge deck, including a base 1 and a shoulder 10. The upper part of the base 1 is divided into two parts, namely a cross slope area and a longitudinal slope area.

[0031] The cross slope area includes a water-stabilized layer 2 set on top of the substrate 1, a waterproof layer 3 laid on the surface of the water-stabilized layer 2, and an asphalt layer 4 laid on the surface of the waterproof layer 3.

[0032] The longitudinal slope area includes a connecting layer 5, which is divided into two by an expansion joint at the upper end of the base 1. A rainwater collection box 8 is provided at the lower end of one of the connecting layers 5 and at the upper end of the base 1. A water-permeable filler 7 is provided on one side of the connecting layer 5 and at the upper end of the rainwater collection box 8. A drain pipe 9 is connected to the side wall of the rainwater collection box 8 and extends into the expansion joint opened in the middle of the base 1.

[0033] An expansion joint body 6 is installed on the upper end of the connecting layer 5. There are two expansion joint bodies 6, which are located on both sides of the expansion joint gap, respectively.

[0034] By setting up a pre-reserved drainage channel in the formwork and installing a rainwater collection box 8 before pouring the expansion joint concrete, and adding permeable filler such as crushed stone 7 after construction, a continuous water guiding channel is formed, consisting of a drainage channel, permeable filler 7, rainwater collection box 8, and drainage pipe 9. This effectively solves the problem of drainage obstruction caused by the post-poured concrete cutting off the original drainage channel, and achieves effective collection and orderly discharge of water accumulated in the area cut off by the post-poured concrete. This avoids water accumulation at the expansion joint and improves the drainage efficiency and structural durability of the bridge expansion joint.

[0035] The permeable filler 7 is made of permeable gravel. The lower end of the permeable filler 7 is connected to the inner cavity of the rainwater collection box 8, allowing permeable water to be guided into the rainwater collection box 8. Utilizing the gaps between the permeable gravel as a rapid water passage channel, the collected water can be quickly guided vertically downwards, ensuring that the permeable water smoothly enters the rainwater collection box 8, thus improving the effectiveness of local drainage. Shoulders 10 are located on both sides of the base 1, and drainage channels are provided at the upper ends of the shoulders 10. Dedicated drainage outlets are pre-set in the shoulder 10 structure, providing a definite discharge outlet for surface water, ensuring the continuity and guidance of the water flow channel, and improving the overall orderliness of drainage. Water-stabilized layer 2. Both the waterproof layer 3 and the asphalt layer 4 are inclined towards the shoulder 10 to guide surface water towards the shoulder 10. The slope design of each structural layer creates gravitational potential energy to guide the direction of water flow, which can actively push the surface water continuously towards the shoulder 10, realizing the gravity flow of road water and improving the smoothness of bridge deck drainage. The connecting layer 5 is inclined towards the expansion joint to guide infiltrated water to the rainwater collection box 8 for discharge. A directional slope pointing towards the expansion joint is set on the infiltrated layer to control the flow direction of infiltrated water and make it accurately flow into the rainwater collection box 8 at the expansion joint, realizing the targeted discharge of deep infiltrated water and improving the targeted drainage of the internal structure.

[0036] Working Principle: Before pouring the expansion joint concrete, a drainage channel is pre-reserved in the formwork and a rainwater collection box 8 is installed. After construction, permeable gravel is filled as a seepage filler 7. During operation, the slope of the water-stabilized layer 2, waterproof layer 3, and asphalt layer 4 towards the shoulder 10 guides surface water to converge on both sides and drain away through the drainage channel at the upper end of the shoulder 10. Simultaneously, the inclined setting of the connecting layer 5 towards the expansion joint guides the infiltrated water to the collection box, allowing it to seep downwards through the pores of the permeable gravel into the rainwater collection box 8. Finally, the water is discharged directly through the drainage pipe 9. Through the above design, a continuous water guiding channel is formed, consisting of a drainage channel, seepage filler 7, rainwater collection box 8, and drainage pipe 9. This effectively solves the drainage obstruction problem caused by the post-poured concrete cutting off the original drainage channel, achieving effective collection and orderly discharge of water accumulated in the area cut off by the post-poured concrete, avoiding water accumulation at the expansion joint, and significantly improving the drainage efficiency and structural durability of the bridge expansion joint.

[0037] The following points should be noted in this article:

[0038] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0039] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A drainage structure for a bridge deck expansion joint, comprising a base (1) and a shoulder (10), characterized in that: The upper part of the substrate (1) is divided into two parts, namely the transverse slope area and the longitudinal slope area; The cross slope area includes a water-stabilized layer (2) set on the substrate (1), a waterproof layer (3) laid on the surface of the water-stabilized layer (2), and an asphalt layer (4) laid on the surface of the waterproof layer (3). The longitudinal slope area includes a connecting layer (5), which is divided into two by an expansion joint at the upper end of the substrate (1). A rainwater collection box (8) is provided at the lower end of the connecting layer (5) and at the upper end of the substrate (1). A water-permeable filler (7) is provided on one side of the connecting layer (5) and at the upper end of the rainwater collection box (8). A drain pipe (9) is connected to the side wall of the rainwater collection box (8). The drain pipe (9) extends into the expansion joint opened in the middle of the substrate (1). The upper end of the connecting layer (5) is equipped with an expansion joint body (6), and there are two expansion joint bodies (6), which are located on both sides of the expansion joint gap respectively.

2. The drainage structure for the bridge deck expansion joint as described in claim 1, characterized in that: The permeable filler (7) is made of permeable gravel. The lower end face of the permeable filler (7) is connected to the inner cavity of the rainwater collection box (8) to guide the permeated water into the rainwater collection box (8).

3. The drainage structure for the bridge deck expansion joint as described in claim 1, characterized in that: The road shoulder (10) is provided on both sides of the base (1), and a drainage groove is provided at the upper end of the road shoulder (10).

4. The drainage structure for the bridge deck expansion joint as described in claim 1, characterized in that: The water-stabilized layer (2), waterproof layer (3) and asphalt layer (4) are all inclined toward the shoulder (10) to guide surface water toward the shoulder (10) side for discharge.

5. The drainage structure for the bridge deck expansion joint as described in claim 1, characterized in that: The connecting layer (5) is inclined toward the expansion joint to guide the infiltrated water to the rainwater collection box (8) for discharge.

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