A detachable and replaceable bridge deck drainage pipe device

Abstract

This utility model discloses a detachable and replaceable bridge deck drainage pipe device, including a steel sleeve, a drainage ring, a waterproof gasket, a grating cover, an inner drainage pipe, and a sealing and fixing layer. One end of the steel sleeve is threadedly connected to the drainage ring; the drainage ring is installed in an installation hole drilled in the bridge body, and its other end serves as an inlet connected to a drainage ditch. A second annular step is also provided on the inner wall of the pipe body; the grating cover is embedded in the inlet; one end of the inner drainage pipe has a retaining ring on its outer circumference, and the other end protrudes from the steel sleeve; the retaining ring is located inside the drainage ring; the waterproof gasket is fitted onto the inner drainage pipe, with its two ends respectively contacting the retaining ring and the second annular step for sealing and waterproofing; the sealing and fixing layer fills and seals the gap between the drainage ring and the installation hole. This utility model's drainage pipe device effectively isolates rainwater from contact with the steel sleeve and bridge reinforcement, preventing corrosion and concrete spalling, and improving bridge durability.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of bridge engineering drainage technology, and more specifically, relate to a detachable and replaceable bridge deck drainage pipe device. Background Technology

[0002] As a crucial component of bridge ancillary facilities, bridge drainage design is key to ensuring the durability of the bridge structure. A bridge drainage system generally consists of road longitudinal and transverse slope design, bridge deck drainage pipe layout, under-bridge longitudinal drainage pipe layout, pier and abutment riser layout, and surface drainage system. Of these, only the bridge deck drainage pipes are located inside the bridge structure; the other components are all located externally. Their difficulty to detect and disassemble / replace makes the bridge deck drainage pipes one of the most vulnerable parts of the drainage system.

[0003] Conventional bridge deck drainage pipes typically include PVC pipes and cast iron pipes. PVC pipes have poor durability, are prone to cracking and leaking after long-term wear, and have a short service life. Cast iron pipes are prone to rust and aging, and because they need to be tied to the steel reinforcement of the bridge superstructure, this provides a channel for the steel reinforcement inside the beams to corrode, becoming a major source of pollution affecting the bridge's durability. Both types also share some common drawbacks: they are difficult to disassemble and replace, difficult to clean after blockage, and unable to drain accumulated rainwater. An investigation of the current state of bridge deck drainage pipes on existing highway bridges in my country reveals that damaged PVC pipes, rusted metal pipes, blocked pipes, spalling of concrete from the main beams around the pipe outlets, and exposed and rusted main beam reinforcement are common occurrences.

[0004] Therefore, there is an urgent need for a bridge deck drainage pipe device that facilitates the replacement of damaged and aging pipes, isolates rainwater from the potential for corrosion and concrete spalling of the surrounding bridge structure, and improves the durability of the bridge. Summary of the Invention

[0005] In view of the problems that existing drainage pipes are prone to concrete spalling, exposed and corroded steel bars, and difficulty in replacing the pipes, this utility model provides a detachable and replaceable bridge deck drainage pipe device to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides a detachable and replaceable bridge deck drainage pipe device, comprising: a steel sleeve pre-embedded in the bridge body, with an external thread on the outer side of the sleeve near the bridge deck drainage ditch; a drainage ring disposed in an installation hole drilled in the bridge body, with one end of the sleeve serving as an inlet connected to the drainage ditch, and the other end having an internal thread on its inner side, and a second annular step on its inner wall; a fixed connection between the drainage ring and the steel sleeve achieved by a waterproof adhesive tape around the outer periphery of the external thread and the internal thread; a drainage inner pipe with a retaining ring around one end of its outer periphery, the other end serving as a drainage outlet and extending through the other end of the steel sleeve; and a waterproof gasket fitted on the drainage inner pipe, with both ends abutting against the retaining ring and the second annular step, respectively, and the drainage inner pipe being limited and fixed within the drainage ring by an interference fit.

[0007] Furthermore, it also includes a sealing and fixing layer, which is formed by filling the gap between the drain ring and the mounting hole with asphalt-impregnated hemp or sealant.

[0008] Furthermore, the inlet of the drain ring is fitted with a grid cover plate with multiple grid holes for allowing rainwater to pass through while blocking debris from entering the drain ring.

[0009] Furthermore, the drain sleeve is made of PVC material and has a frustum-shaped tubular structure. The thicker end of the sleeve serves as the water inlet and is connected to the drainage ditch; the thinner end of the sleeve has an internal thread on its inner side.

[0010] Furthermore, the outer pipe of the drain sleeve is provided with multiple sets of disassembly holes in the circumferential direction.

[0011] Furthermore, the drain sleeve pipe is provided with a first annular step near the inlet to limit the embedding depth of the grille cover.

[0012] Furthermore, the steel sleeve is a steel tubular component, and a circular steel plate is fixedly welded to the outer circumference of its bottom. The circular steel plate has a ring width of 10cm. Multiple sets of anchoring reinforcing ribs are vertically welded to the circular steel plate.

[0013] Furthermore, the steel sleeve is set vertically and is embedded in the main beam of the bridge superstructure, located below the drainage ditch. The external threaded part at the top of the sleeve is located in the mounting hole, which is located at the bottom of the drainage ditch and is formed by excavating the asphalt pavement layer and the cast-in-place concrete layer.

[0014] Furthermore, the steel sleeve is installed in a horizontal direction and is embedded in the concrete guardrail of the bridge superstructure. The external threaded part at the top of the sleeve is located in the mounting hole, which is located outside the drainage ditch and is formed by chiseling the bottom of the inner side of the concrete guardrail.

[0015] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0016] (1) The drain pipe device of this utility model adopts a threaded steel sleeve and drain ring structure, combined with the disassembly hole design, to achieve quick disassembly and replacement, avoiding the situation that the concrete needs to be chiseled open to replace the drain pipe, and solving the problem that traditional drain pipes are difficult to clean and cannot be replaced after being blocked.

[0017] (2) The drainage pipe device of this utility model effectively isolates rainwater from contact with the steel sleeve and bridge steel bars through multiple sealing measures such as waterproof tape, waterproof gasket and sealing fixing layer, preventing corrosion and concrete spalling, and improving the durability of the bridge.

[0018] (3) The drainage pipe device of this utility model adopts a combination of steel sleeve and PVC inner pipe, which takes into account both the strength of steel and the waterproof performance of PVC pipe, and isolates the potential for water to corrode the bridge structure.

[0019] (4) The drainage pipe device of this utility model is composed of standardized modules such as steel sleeve, drainage ring, and PVC drainage inner pipe, which can flexibly adapt to the installation requirements of different bridge structures (main beam or guardrail) and take into account both versatility and scenario application. Attached Figure Description

[0020] Figure 1 A structurally disassembled cross-sectional view of a detachable and replaceable bridge deck drainage pipe device provided by this utility model;

[0021] Figure 2 A structural breakdown diagram of a detachable and replaceable bridge deck drainage pipe device provided by this utility model;

[0022] Figure 3 A schematic diagram of the structural assembly of a detachable and replaceable bridge deck drainage pipe device provided by this utility model;

[0023] Figure 4 A schematic diagram of the first embodiment of a detachable and replaceable bridge deck drainage pipe device provided by this utility model;

[0024] Figure 5 This is a schematic diagram of the second embodiment of a detachable and replaceable bridge deck drainage pipe device provided by this utility model.

[0025] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-steel sleeve, 2-circular steel plate, 3-external threaded part, 4-drainage collar, 401-first annular step part, 402-second annular step part, 5-internal threaded part, 6-drainage ditch, 7-disassembly hole, 8-drainage inner pipe, 9-clamping ring, 10-waterproof gasket, 11-grating cover plate, 12-sealing and fixing layer, 13-anchoring reinforcing rib, 14-main beam, 15-concrete guardrail, 16-asphalt pavement layer, 17-cast-in-place concrete layer. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1-5 As shown, this utility model provides a detachable and replaceable bridge deck drainage pipe device, including a steel sleeve 1, a drainage ring 4, a waterproof gasket 10, a grating cover plate 11, a drainage inner pipe 8, and a sealing and fixing layer 12. The steel sleeve 1 is pre-embedded in the bridge body, and its outer side near the bridge deck drainage ditch 6 has an external threaded part 3; the drainage ring 4 is fixedly installed in the installation hole drilled in the bridge body, one end of its pipe opening serves as a water inlet connected to the drainage ditch 6, and the other end of its pipe opening has an internal threaded part 5, and the inner wall of the pipe body also has a second annular step part 402; the grating cover plate 11 is embedded in the water inlet to prevent impurities from entering; the drainage ring 4 and the steel sleeve 1 are fixedly connected by a waterproof tape on the outer periphery of the external threaded part 3 and the internal threaded part 5; The inner drainage pipe 8 is a PVC drainage pipe. One end of the pipe has a retaining ring 9 on its outer circumference, and the other end serves as a drainage outlet, extending through the other end of the steel sleeve 1. The retaining ring 9 is located inside the drain ring 4, and its outer diameter is larger than the inner diameter of the second annular step 402. The waterproof gasket 10 is fitted onto the inner drainage pipe 8, with both ends contacting the retaining ring 9 and the second annular step 402 respectively for sealing and waterproofing. The sealing and fixing layer 12 fills and seals the gap between the drain ring 4 and the mounting hole, preventing rainwater from flowing into the mounting hole and contacting the steel sleeve 1. In this embodiment, the threaded connection between the steel sleeve 1 and the drain ring 4 facilitates the inspection and replacement of the drainage pipeline. The waterproof tape, waterproof gasket 10, and sealing and fixing layer 12 isolate rainwater from contact with the steel sleeve 1, preventing rainwater from seeping into the surrounding bridge structure and reducing the occurrence of defects such as concrete spalling and exposed and corroded reinforcing bars.

[0028] The steel sleeve 1 is a steel tubular component, pre-embedded in the bridge body, used to fix and install the drainage sleeve 44 and to drain rainwater from the bridge deck through the drainage inner pipe 8. Furthermore, a circular steel plate 2 with a ring width of 10cm is welded and fixed to the outer circumference of the bottom of the steel sleeve 1. Multiple sets of anchoring reinforcing ribs 13 are vertically welded to the circular steel plate 2 and tied and fixed to the steel bars in the bridge body, thereby improving the binding and fixing strength and accuracy of the steel sleeve 1, preventing stress displacement during later pouring, and improving the bonding strength between the steel sleeve 1 and the concrete, avoiding the spalling of the main beam concrete around the pipe outlet in the later stage, which would affect the structural durability and aesthetics.

[0029] Furthermore, the outer side of the steel sleeve 1 near the bridge deck drainage ditch is provided with an external thread 3, which is located in the mounting hole and is used to connect the drainage ring 4, making it convenient for disassembly and replacement later.

[0030] The drain sleeve 4 is made of PVC material and has a frustum-shaped tubular structure. Its thicker end serves as the inlet, connecting to the drainage ditch. The thinner end has an internal thread 5 that matches the external thread 3, and the two are connected by threads to fix the drain sleeve 4 to the steel sleeve 1. Furthermore, to prevent rainwater from flowing from the drain sleeve 4 into the external thread 3 and causing corrosion of the steel sleeve 1, waterproof tape is provided between the internal thread 5 and the external thread 3. In use, the waterproof tape is wrapped around the outer circumference of the external thread 3, and then the internal thread 5 and external thread 3 are threaded together to seal and isolate the connection between the drain sleeve 4 and the steel sleeve 1. This allows for easy disassembly and replacement of the drain pipe while effectively sealing and isolating the steel sleeve 1, preventing corrosion and thus significantly improving the service life of the drain pipe device.

[0031] Furthermore, the drain sleeve 4 is provided with a first annular step 401 near the water inlet, which is used to limit the embedding depth of the grille cover 11.

[0032] Furthermore, the drain sleeve 4 is provided with a second annular step portion 402 inside the pipe, the inner diameter of which is smaller than the inner diameter of the first annular step portion 401, which is used to limit the drainage inner pipe 8 and determine the installation position of the drainage inner pipe 8.

[0033] Furthermore, the outer tube of the drain ring 4 is provided with multiple sets of disassembly holes 7 in the circumferential direction, which provide radial force points when disassembling and replacing the drain ring 4. By inserting the end of the pry bar into the disassembly hole 7 and hammering the other end of the pry bar, a radial impact force is applied to the drain ring 4, causing the drain ring 4 to rotate and thus separate from the steel sleeve 1, which facilitates the disassembly of the drain ring 4 in the narrow space of the installation hole.

[0034] During installation, waterproof tape is wrapped around the outer circumference of the external threaded portion 3. The drain ring 4 is then placed into the mounting hole on the bridge body, aligning the internal threaded portion 5 with the external threaded portion 3. The drain ring 4 is then tightened to fix it onto the steel sleeve 1. The gap between the drain ring 4 and the mounting hole is filled and sealed by using asphalt-impregnated hemp or sealant to fill the gap and form a sealing and fixing layer 12. This further fixes the drain ring 4 and prevents rainwater from seeping into the bridge body through the gap between the drain ring 4 and the mounting hole and contacting the steel sleeve 1. This prioritizes preventing corrosion of the steel reinforcement and steel sleeve 1 within the bridge body, thus avoiding the occurrence of exposed steel reinforcement corrosion and concrete spalling.

[0035] The drainage inner pipe 8 discharges rainwater that enters the drainage sleeve 4 into the bridge body. It is a circular pipe structure made of PVC material. Its outer diameter is matched with the inner diameter of the steel sleeve 1 and can pass through the steel sleeve 1, thereby leading the rainwater out of the bridge body.

[0036] Furthermore, a retaining ring 9 is provided on the outer periphery of one end of the drain inner pipe 8. The retaining ring 9 is used to limit the engagement with the second annular step portion 402 to determine the installation position of the drain inner pipe 8, which is located inside the drain sleeve 4 pipe, and its outer diameter is larger than the inner diameter of the second annular step portion 402.

[0037] Furthermore, a waterproof gasket 10 is also fitted on the inner drain pipe 8, which limits and fixes the inner drain pipe 8 within the drain sleeve 4 through an interference fit to prevent axial displacement. The waterproof gasket 10 is made of rubber, with an inner diameter smaller than the outer diameter of the inner drain pipe 8 and an outer diameter larger than the inner diameter of the first annular step portion 401. Its two ends abut against the retaining ring 9 and the second annular step portion 402, respectively.

[0038] When installing the inner drain pipe 8, a waterproof gasket 10 is fitted onto the body of the inner drain pipe 8, and the inner drain pipe 8 is passed through the drain ring 4 and the steel sleeve 1 in sequence until the two ends of the waterproof gasket 10 abut against the retaining ring 9 and the second annular step 402 respectively, thereby completing the positioning and installation of the inner drain pipe 8.

[0039] By providing a waterproof gasket 10, the inner drain pipe 8 can be limited and fixed inside the drain sleeve 4 to prevent axial displacement. At the same time, the gap between the inner drain pipe 8 and the drain sleeve 4 is sealed to prevent rainwater from entering the steel sleeve 1 from the outside of the inner drain pipe 8 and causing corrosion.

[0040] The structure of the grating cover 11 is adapted to the structure of the inlet of the drainage ring 4 and is embedded in the inlet of the drainage ring 4. It has multiple grid holes to allow rainwater to pass through while blocking debris from entering the drainage ring 4, preventing blockage in the drainage pipe 8 and thus ensuring smooth drainage. For disassembly, a pry bar can be inserted into the grid holes to pry the grating cover 11 out.

[0041] like Figure 4 As shown, in one embodiment of this utility model, the steel sleeve 1 is arranged vertically and is pre-embedded in the main beam 14 of the bridge superstructure, located below the drainage ditch 6. Its top external thread 3 is located in an installation hole at the bottom of the drainage ditch, formed by excavating the asphalt pavement layer 16 and the cast-in-place concrete layer 17. Waterproof tape is wrapped around the outer circumference of the external thread 3, and the drainage ring 4 is inserted into the installation hole on the bridge body, aligning the internal thread 5 with the external thread 3. The drainage ring 4 is then tightened to fix it to the steel sleeve 1. The gap between the pipe and the mounting hole is filled and sealed by using asphalt-impregnated hemp or sealant to fill the gap and form a sealing and fixing layer 12. A waterproof gasket 10 is fitted onto the body of the inner drainage pipe 8, and the inner drainage pipe 8 is passed through the drain ring 4 and the steel sleeve 1 in sequence until both ends of the waterproof gasket 10 abut against the retaining ring 9 and the second annular step 402, respectively. The grating cover plate 11 is embedded in the inlet of the drain ring 4 to complete the installation of the drain pipe device. Rainwater can enter the inner drainage pipe 8 from the grating cover plate 11 at the bottom of the drainage ditch 6 and then be discharged outside the bridge body. When disassembling and replacing, the sealing and fixing layer 12 is removed, the drain ring 4 is turned, and the drain ring 4 and the inner drainage pipe 8 are taken out for replacement.

[0042] like Figure 5 As shown, in another embodiment of this utility model, the steel sleeve 1 is arranged in a horizontal direction and is pre-embedded in the concrete guardrail 14 of the bridge superstructure. The external thread 3 at the top of the sleeve is located in the mounting hole, which is located outside the drainage ditch and is formed by chiseling the bottom of the inner side of the concrete guardrail 15. Waterproof tape is wrapped around the outer circumference of the external thread 3, and the drainage ring 4 is placed into the mounting hole on the bridge body, so that the internal thread 5 is aligned with the external thread 3. The drainage ring 4 is then tightened to fix it to the steel sleeve 1. The gap between the drainage ring 4 and the mounting hole is filled and sealed by using asphalt-impregnated hemp or sealant. The gaps are filled to form a sealing and fixing layer 12; a waterproof gasket 10 is fitted onto the body of the inner drainage pipe 8, and the inner drainage pipe 8 is passed through the drain ring 4 and the steel sleeve 1 in sequence until both ends of the waterproof gasket 10 abut against the retaining ring 9 and the second annular step 402 respectively. The end of the inner drainage pipe 8 located outside the concrete guardrail 14 is connected to the vertically installed drainage pipe through a bend connector, thereby discharging rainwater to the area under the bridge; the grating cover plate 11 is embedded in the inlet of the drain ring 4 to complete the installation of the drainage pipe device; rainwater can enter the inner drainage pipe 8 from the grating cover plate 11 on the side of the drainage ditch 6 and then be discharged outside the bridge. When disassembling and replacing, remove the bend connector and the vertically installed drainage pipe, remove the sealing and fixing layer 12, and twist the drain ring 4 to remove the drain ring 4 and the inner drainage pipe 8 for replacement.

[0043] The drainage pipe device of this utility model adopts a threaded connection steel sleeve and drainage ring structure, combined with a disassembly hole design, to achieve quick disassembly and replacement, avoiding the situation where concrete needs to be chiseled and cut to replace the drainage pipe, and solving the problem that traditional drainage pipes are difficult to clean and cannot be replaced after being blocked.

[0044] The drainage pipe device of this utility model effectively isolates rainwater from contact with the steel sleeve and bridge steel bars through multiple sealing measures such as waterproof tape, waterproof gasket and sealing fixing layer, preventing corrosion and concrete spalling, and improving the durability of the bridge.

[0045] The drainage pipe device of this utility model adopts a combination of steel sleeve and PVC inner pipe, which takes into account both the strength of steel and the waterproof performance of PVC pipe, and isolates the bridge structure from the risk of corrosion caused by water.

[0046] The drainage pipe device of this utility model is composed of standardized modules such as steel sleeve, drainage collar, and PVC drainage inner pipe. It can flexibly adapt to the installation requirements of different bridge structures (main beam or guardrail) and take into account both versatility and scenario-based application.

[0047] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A demountably replaceable deck drain device, characterized by, include: The steel sleeve (1) pre-embedded in the bridge body has an external thread (3) on the outer side of the pipe body at the end near the bridge deck drainage ditch (6). The drain ring (4) installed in the installation hole drilled on the bridge body has one end of its pipe opening as a water inlet connected to the drainage ditch (6), and the other end of its pipe opening has an internal thread (5) on the inside, and a second annular step (402) on the inner wall of its pipe body; after the outer periphery of the external thread (3) is provided with waterproof tape, it is threadedly connected to the internal thread (5) to realize the fixed connection between the drain ring (4) and the steel sleeve (1); A drain pipe (8) with a retaining ring (9) on the outer periphery of one end of the pipe opening, and the other end of the pipe serving as a drain outlet and passing through the other end of the steel sleeve (1); And a waterproof gasket (10) fitted on the inner drain pipe (8), the two ends of which abut against the retaining ring (9) and the second annular step (402) respectively, and the inner drain pipe (8) is limited and fixed in the drain sleeve (4) by interference fit.

2. A demountably replaceable bridge drain device according to claim 1, wherein, It also includes a sealing and fixing layer (12), which is formed by filling the gap between the drain ring (4) and the mounting hole with asphalt-impregnated hemp or sealant.

3. A detachable and replaceable bridge deck drainage pipe device according to claim 1, characterized in that, The inlet of the drain ring (4) is fitted with a grid cover plate (11), which has multiple grid holes for allowing rainwater to pass through and blocking debris from entering the drain ring (4).

4. A detachable and replaceable bridge deck drainage pipe device according to any one of claims 1-3, characterized in that, The drain ring (4) is made of PVC material and has a frustum-shaped tubular structure. The thicker end of the pipe is used as the inlet and connected to the drainage ditch; the thinner end of the pipe has an internal thread (5) on its inner side.

5. A detachable and replaceable bridge deck drainage pipe device according to any one of claims 1-3, characterized in that, The outer side of the drain sleeve (4) is provided with multiple sets of disassembly holes (7).

6. A detachable and replaceable bridge deck drainage pipe device according to claim 3, characterized in that, The drain ring (4) has a first annular step (401) inside the pipe, near the water inlet, which is used to limit the embedding depth of the grid cover (11).

7. A detachable and replaceable bridge deck drainage pipe device according to any one of claims 1-3, characterized in that, The steel sleeve (1) is a steel tubular component, and a circular steel plate (2) is fixedly welded to the outer periphery of its bottom. The circular steel plate (2) has a ring width of 10cm. Multiple sets of anchoring reinforcing ribs (13) are vertically welded on the circular steel plate (2).

8. A detachable and replaceable bridge deck drainage pipe device according to any one of claims 1-3, characterized in that, The steel sleeve (1) is set vertically and is embedded in the main beam (14) of the bridge superstructure. It is located below the drainage ditch (6) and the external thread (3) at the top is located in the mounting hole, which is located at the bottom of the drainage ditch and is formed by chiseling the asphalt pavement layer (16) and the cast-in-place concrete layer (17).

9. A detachable and replaceable bridge deck drainage pipe device according to any one of claims 1-3, characterized in that, The steel sleeve (1) is set in a horizontal straight direction and is embedded in the concrete guardrail (15) of the bridge superstructure. The external thread (3) at the top of the sleeve is located in the mounting hole, which is located outside the drainage ditch and is formed by chiseling the bottom of the inner side of the concrete guardrail (15).

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