Pier top drainage structure capable of preventing expansion joint from leaking water

Abstract

The utility model relates to a pier top drainage structure capable of preventing water leakage of an expansion joint. The pier top drainage structure comprises a U-shaped drainage groove, a trapezoidal ramp and a water dripping part. The U-shaped drainage channel is arranged along the edge of the inner side of the padstone, the trapezoidal ramp is arranged on one side of the U-shaped drainage channel, and the dripping part is arranged on one side of the trapezoidal ramp. Plugs are arranged at the two ends of the U-shaped drainage groove, and a first drainage pipe is pre-buried in the plugs and connected with a second drainage pipe; the U-shaped drainage groove has a gradient, so that accumulated water in the U-shaped drainage groove can be conveniently guided to the first drainage pipe on the side edge. Compared with the prior art, the U-shaped drainage structure is suitable for transition piers of various plate-type piers and transition piers of capping beam connecting column type piers, the U-shaped drainage groove, the water dripping part and the piers are of an integrated permanent structure, replacement is not needed, durability is good, maintenance cost is low, and the structure of the piers is not affected. In addition, the U-shaped drainage groove is not limited by whether the top of the bridge pier has a gradient or not, longitudinal and transverse drainage gradients of the bridge can be formed through the U-shaped drainage groove, and drainage is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a pier top drainage structure for preventing expansion joint leakage. Background Art

[0002] Expansion joints are a crucial component of bridge structures. Existing bridge expansion joints generally have a short service life, typically only 2-3 years, with some lasting only 4-5 years. They also experience a breakage rate of up to 80%. Failure to maintain and repair expansion joints promptly can lead to leakage, which in turn can cause rainwater to directly erode the pier tops. Long-term, untimely maintenance can also cause water accumulation on the pier tops and rainwater erosion on the sides of the piers. This can also cause rust and aging in the bearings, shortening their service life. This is particularly true for slab-type piers.

[0003] To address this issue, the current method involves installing U-shaped metal drain channels at the bottom of the beams on both sides of the expansion joint. One side is fixed to the beam bottom, while the other side is located at the bottom of the beam at the other end, allowing for sliding to accommodate the expansion and contraction requirements of the beam ends. However, this structure suffers from structural failure and poor durability due to repeated expansion and contraction of the beam ends, and water leakage and erosion of the pier tops can still occur.

[0004] Therefore, there is an urgent need to study a pier top drainage structure that can prevent expansion joint leakage and is durable. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art by providing a pier top drainage structure that prevents expansion joint leakage. The U-shaped drainage channel utilizes the space between the original pad stones for drainage, and the drip portion can be adjusted to suit the shape of the pier without affecting the pier structure. It features a simple design and convenient construction.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] The utility model provides a pier top drainage structure for preventing expansion joint leakage, comprising a U-shaped drainage trough, a trapezoidal ramp and a drip portion, wherein the U-shaped drainage trough is arranged along the inner edge of the pad stone, the trapezoidal ramp is arranged on one side of the U-shaped drainage trough, and the drip portion is arranged on one side of the trapezoidal ramp;

[0008] Both ends of the U-shaped drainage trough are provided with plugs, a first drainage pipe is embedded in the plug, and the end of the first drainage pipe is connected to the second drainage pipe; the U-shaped drainage trough is provided with a slope to facilitate the drainage of the accumulated water in the U-shaped drainage trough to the first drainage pipe on the side.

[0009] Furthermore, the cross section of the dripping portion is in an inverted L shape.

[0010] Furthermore, the plug is embedded in both ends of the U-shaped drainage trough, and the width of the plug is less than or equal to 300 mm.

[0011] Furthermore, the length of the first drain pipe is consistent with the width of the plug.

[0012] Furthermore, the second drain pipe is arranged below the first drain pipe, the end of the second drain pipe is placed in a water collecting bucket, and the other end of the water collecting bucket is connected to one end of the third drain pipe.

[0013] Furthermore, the U-shaped drainage trough, trapezoidal ramp, drip portion and bridge pier are an integrated structure.

[0014] Furthermore, the height of the U-shaped drainage trough is less than the height of the pad stone, and the height of the U-shaped drainage trough is greater than 100 mm.

[0015] Furthermore, the trapezoidal ramps are arranged opposite to each other along both sides of the U-shaped groove, and the edges of the two trapezoidal ramps are provided with dripping parts.

[0016] Furthermore, the plug is a slope-top plug, which is formed by the confluence of the slope top of the trapezoidal ramp as the highest point;

[0017] The height of the plug is higher than the height of the drainage trough.

[0018] Furthermore, a third drainage pipe is provided below the water collecting hopper, and the third drainage pipe is connected to the ground water collecting system for draining the water accumulated on the pier top.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. This utility model utilizes a U-shaped gutter, drip section, and bridge pier as an integrated, permanent structure, eliminating the need for replacement and offering excellent durability and low maintenance costs. The U-shaped gutter utilizes the space between the existing bed stones for drainage, and the drip section can be adjusted to suit the shape of the bridge pier without affecting the pier structure. The design is simple and construction is convenient.

[0021] 2. The U-shaped drainage trough in the present invention is not limited by whether the pier top is provided with a slope. The design of the U-shaped drainage trough can form a longitudinal and transverse drainage slope of the bridge, which is beneficial to drainage.

[0022] 3. The utility model utilizes the bridge pier as a drainage structure, which does not affect the expansion and contraction requirements of the upper structure beam end, and is applicable to the transition piers of various plate-type piers and the transition piers of cap beam-column piers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a side sectional view of a pier top drainage structure for preventing expansion joint leakage;

[0024] Figure 2 It is a side view of a pier top drainage structure for preventing expansion joint leakage;

[0025] Figure 3 This is a top view of a pier top drainage structure that prevents expansion joint leakage.

[0026] Figure 1 Description of the markup in:

[0027] 1- trapezoidal ramp, 2- dripping part, 3- U-shaped drainage trough, 9- pier, 10- pad stone;

[0028] Figure 2 Description of the markup in:

[0029] 1- trapezoidal ramp, 2- dripping part, 4- plug, 5- first drainage pipe, 6- second drainage pipe, 7- water collecting hopper, 8- third drainage pipe, 9- bridge pier;

[0030] Figure 3 Description of the markup in:

[0031] 1- Trapezoidal ramp, 2- Drip part, 3- U-shaped drainage trough, 4- Plug, 5- First drainage pipe, 6- Second drainage pipe, 7- Water collection bucket. DETAILED DESCRIPTION

[0032] The specific implementation methods of the present invention are described in detail below through examples. These examples are implemented on the premise of the scheme described in the present invention, and provide detailed implementation methods and specific operating processes, but the protection scope of the present invention is not limited to the following examples.

[0033] The present invention is further described below with reference to the accompanying drawings and specific embodiments. Any features, such as component models, material names, connection structures, preparation methods, materials, structures, or composition ratios, that are not explicitly described in this technical solution are considered to be common technical features disclosed in the prior art.

[0034] Example 1

[0035] This embodiment provides a pier top drainage structure to prevent expansion joint leakage, such as Figures 1 to 3 As shown, the U-shaped drainage trough 3, trapezoidal ramp 1, and drip section 2 are integrated with the bridge pier 9. The U-shaped drainage trough 3 is located along the inner edge of the sill 10. Its height is less than that of the sill 10 and greater than 100 mm. A transverse slope is provided within the U-shaped drainage trough 3 to direct accumulated water within the trough 3 to the first drainage pipe 5 at the side.

[0036] The trapezoidal ramp 1 is provided on one side of the U-shaped drainage trough 3, and the drip portion 2 is provided on one side of the trapezoidal ramp 1. The trapezoidal ramps 1 are arranged opposite each other along the two sides of the U-shaped trough, and the edges of the two trapezoidal ramps 1 are provided with drip portions 2. A plug 4 is provided at both ends of the U-shaped drainage trough 3, and a first drainage pipe 5 is embedded in the plug 4. The end of the first drainage pipe 5 is connected to a second drainage pipe 6. The cross-section of the drip portion 2 is an inverted L-shape. The length of the first drainage pipe 5 is consistent with the width of the plug 4. The second drainage pipe 6 is provided below the first drainage pipe 5, and the end of the second drainage pipe 6 is placed in a water collecting hopper 7. The other end of the water collecting hopper 7 is connected to one end of a third drainage pipe 8.

[0037] The plug 4 is embedded in both ends of the U-shaped drain trough 3. The width of the plug 4 is less than or equal to 300 mm and can be adjusted according to the actual construction requirements. The plug 4 is formed by the top of the trapezoidal ramp 1 extending and converging as the highest point to form a slope-top plug 4. The height of the plug 4 is higher than the height of the drain trough.

[0038] In this embodiment, the height of the pier 9 is 15m, and the height of the continuous beam support system, that is, the total height of the wedge, support, and pad stone, is 450mm. The pad stone 10 is 190mm high, and the height of the U-shaped drainage trough 3 is 150mm, and the width is 500mm. The width of the drip portion 2 is 200mm. The pier 9 is a conventional plate-type transition pier, and the pier head is expanded along the bridge. When constructing the pier, the trapezoidal ramp 1, the drip portion 2, the plug 4 on both sides of the U-shaped drainage trough 3 are pre-embedded with connecting steel bars to the pier. After the pier construction is completed, the first drainage pipe 5 is pre-embedded, and the concrete of the trapezoidal ramp 1, the drip portion 2, and the plug 4 is poured to complete the construction of the U-shaped drainage trough 3. The second drainage pipe 6, the third drainage pipe 8, and the water collection bucket 7 are constructed simultaneously with the drainage pipes of the entire bridge.

[0039] In order to reduce the possible blockage and difficulty in replacement caused by the first drain pipe 5 embedded in the plugs 4 on both sides of the U-shaped drainage trough 3, the width of the plug 4 is set to be less than or equal to 300 mm, which can be adjusted according to actual structural needs; the diameter of the first drain pipe 5 is not less than 150 mm, and attention should be paid to the adaptability of the height of the plug 4 and the diameter of the first drain pipe 5 to reduce blockage caused by untimely maintenance.

[0040] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A pier top drainage structure for preventing expansion joint leakage, characterized in that: The invention comprises a U-shaped drainage trough (3), a trapezoidal ramp (1) and a dripping portion (2), wherein the U-shaped drainage trough (3) is arranged along the inner edge of the cushion stone (10), the trapezoidal ramp (1) is arranged on one side of the U-shaped drainage trough (3), and the dripping portion (2) is arranged on one side of the trapezoidal ramp (1); Both ends of the U-shaped drainage trough (3) are provided with plugs (4), a first drainage pipe (5) is pre-buried in the plug (4), and the end of the first drainage pipe (5) is connected to a second drainage pipe (6); the U-shaped drainage trough (3) is provided with a slope, so as to facilitate the drainage of the accumulated water in the U-shaped drainage trough (3) to the first drainage pipe (5) on the side.

2. A pier top drainage structure for preventing expansion joint leakage according to claim 1, characterized in that: The cross section of the dripping portion (2) is in an inverted L shape.

3. The pier top drainage structure for preventing expansion joint leakage according to claim 1, characterized in that: The plug (4) is embedded in both ends of the U-shaped drainage trough (3), and the width of the plug (4) is less than or equal to 300 mm.

4. The pier top drainage structure for preventing expansion joint leakage according to claim 1, characterized in that: The length of the first drain pipe (5) is consistent with the width of the plug (4).

5. The pier top drainage structure for preventing expansion joint leakage according to claim 1, characterized in that: The second drainage pipe (6) is arranged below the first drainage pipe (5), and the end of the second drainage pipe (6) is placed in a water collecting bucket (7), and the other end of the water collecting bucket (7) is connected to one end of the third drainage pipe (8).

6. The pier top drainage structure for preventing expansion joint leakage according to claim 1, characterized in that: The U-shaped drainage trough (3), the trapezoidal ramp (1), the dripping portion (2) and the bridge pier (9) are an integrated structure.

7. The pier top drainage structure for preventing expansion joint leakage according to claim 1, characterized in that: The height of the U-shaped drainage trough (3) is less than the height of the cushion stone (10), and the height of the U-shaped drainage trough (3) is greater than 100 mm.

8. The pier top drainage structure for preventing expansion joint leakage according to claim 1, characterized in that: The trapezoidal ramps (1) are arranged opposite to each other along two sides of the U-shaped groove, and the edges of the two trapezoidal ramps (1) are both provided with dripping parts (2).

9. The pier top drainage structure for preventing expansion joint leakage according to claim 1, characterized in that: The plug (4) is a slope-top plug, and the slope-top plug is formed by taking the slope top extension and confluence of the trapezoidal ramp (1) as the highest point; The height of the plug (4) is higher than the height of the drainage trough.

10. The pier top drainage structure for preventing expansion joint leakage according to claim 5, characterized in that: A third drainage pipe (8) is provided below the water collecting hopper (7), and the third drainage pipe (8) is connected to the ground water collecting system and is used to drain the water accumulated on the pier top.

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