Bridge prefabricated drainage device and construction method thereof

Abstract

The invention discloses a bridge prefabricated drainage device and a construction method thereof, the bridge prefabricated drainage device comprises: a water falling opening cup, the top of which is in an open state and the bottom of which is provided with a water outlet; the first hollow pipe is communicated with the water outlet of the water falling cup; the second hollow pipe is arranged outside the first hollow pipe in a sleeving manner, so that a mounting area for mounting a drainage pipe is formed between the first hollow pipe and the second hollow pipe; and the water stop steel ring is arranged on the second hollow pipe, so that the second hollow pipe and the water stop steel ring jointly serve as a vertical anti-seepage structure for preventing rainwater from infiltrating downwards along the outer wall of the prefabricated drainage device. By installing the prefabricated drainage device at the drainage hole and forming the prefabricated drainage device and the cast-in-place structure at a time, the rainwater grate can be directly installed through the prefabricated drainage device, the rainwater grate can be installed without digging asphalt in the later period, the integrity of the cast-in-place structure cannot be damaged, the bridge construction quality can be effectively improved, and the problems of leakage and water dripping of the drainage hole in the bridge bottom can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a prefabricated bridge drainage device and a construction method thereof. Background Art

[0002] In the infrastructure of cast-in-place reinforced concrete bridges on municipal highways, the conventional construction method for the drainage holes of cast-in-place concrete box girder flange plates is to cut a section of a conventional steel pipe before pouring concrete and directly install it at the drainage hole position in the design drawing. After the concrete pouring is completed and before the asphalt is paved, the drainage hole is blocked with a plate to prevent the asphalt from falling to the bottom of the bridge through the reserved drainage hole during the paving and rolling process. After the asphalt is paved, the asphalt at the drainage hole position is chiseled to install the rainwater grate. This construction method not only affects the quality of the asphalt construction of the bridge deck, but may also lead to the common quality problem of rainwater leaking downward through the contact surface between the drainage hole and the asphalt and dripping from the bottom of the drainage hole. In addition, after the existing drainage holes are constructed, the drainage pipe is generally directly embedded in the drainage holes so that rainwater flows into the drainage holes through the grates and is then discharged through the drainage pipe. However, the arrangement of the drainage pipe embedded in the drainage holes easily reduces the tightness of the connection between the drainage pipe and the drainage holes under long-term erosion by rainwater, resulting in a gap between the drainage pipe and the inner wall of the drainage holes, thereby causing rainwater to seep downward along the gap to the bottom of the drainage holes and drip out, affecting the concrete bottom structure, and the rainwater in the gap laterally seeps into the concrete structure, affecting the stability of the concrete structure.

[0003] In view of this, it is necessary to design a prefabricated bridge drainage device and a construction method thereof to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a prefabricated bridge drainage device and a construction method thereof which has a simple structure, is easy to install, and can effectively prevent rainwater leakage and ensure the construction quality of the bridge drainage holes.

[0005] To achieve the above-mentioned purpose, the present invention provides a prefabricated water discharge device for a bridge, comprising: A water-dropping cup, wherein the top of the water-dropping cup is open and a water outlet is provided at the bottom; A first hollow tube is connected to the water outlet of the water drop cup; A second hollow tube is sleeved outside the first hollow tube, so that an installation area for installing a drain pipe is formed between the first hollow tube and the second hollow tube; The water-stop steel ring is arranged on the second hollow tube, so that the second hollow tube and the water-stop steel ring together serve as a vertical anti-seepage structure for preventing rainwater from seeping down the outer wall of the prefabricated drainage device.

[0006] As a further improvement of the present invention, it also includes a drainage pipe installed in the installation area, and the inner wall and the outer wall of the drainage pipe are respectively connected to the first hollow pipe and the second hollow pipe through fixing members.

[0007] As a further improvement of the present invention, the fixing member is a structural adhesive.

[0008] As a further improvement of the present invention, the diameter of the water outlet is less than or equal to the inner diameter of the first hollow tube.

[0009] As a further improvement of the present invention, the top of the second hollow tube is connected to the bottom of the water drop cup.

[0010] As a further improvement of the present invention, the outer diameter of the second hollow tube is smaller than the diameter of the water drop cup.

[0011] As a further improvement of the present invention, the top of the second hollow tube is connected to the first hollow tube through a top plate, so that the installation area is in a state of being closed at the top and open at the bottom.

[0012] As a further improvement of the present invention, the water spout cup is also provided with a slot for facilitating installation of a cover plate.

[0013] The present invention also provides a construction method of a prefabricated bridge drainage device, comprising the following steps: S1. After the flange plate formwork of the bridge is installed, the prefabricated drainage device is fixed at the drainage hole position; S2, pouring concrete, sealing the prefabricated drainage device with a cover plate after pouring, and then paving asphalt; S3. After the asphalt paving is completed, remove the cover plate, install the rain grate on the water drain cup, and install the drain pipe in the installation area.

[0014] As a further improvement of the present invention, in step S2, the asphalt paving height is equal to the water drop cup height.

[0015] As a further improvement of the present invention, in step S3, when installing the drain pipe, a structural adhesive is used to bond the inner wall of the drain pipe to the first hollow tube, and the outer wall of the drain pipe to the second hollow tube, so that a first bonding layer is formed between the drain pipe and the first hollow tube, and a second bonding layer is formed between the drain pipe and the second hollow tube.

[0016] As a further improvement of the present invention, in step S3, before asphalt paving, a mortar protective layer is first laid around the water spout cup using mortar.

[0017] The beneficial effects of the present invention are: 1. The prefabricated drainage device of the present invention forms an installation area for installing a drainage pipe between the two layers of hollow pipes, thereby solving the problem of difficulty in installing the drainage pipe in the later stage; at the same time, the first hollow pipe located in the inner layer is connected to the water outlet of the water drain cup as a drainage channel, so that the drainage pipe is sleeved on the outer wall of the first hollow pipe from the installation area, which can prevent the situation in which rainwater erodes the bonding layer between the first hollow pipe and the drainage pipe and affects the fixing effect of the drainage pipe during the rainwater discharge process, and the installation area of ​​the present invention is also convenient for fixing the drainage pipe to the first hollow pipe and the second hollow pipe respectively, effectively improving the fixing effect of the drainage pipe.

[0018] 2. The double-layer hollow tube arrangement of the present invention, in addition to forming an installation area for facilitating the installation of a drainage pipe, can also utilize the second hollow tube located in the outer layer as an impermeable member to prevent rainwater from penetrating into the concrete in the lateral direction, effectively improving the impermeable effect of the prefabricated drainage device. In addition, by arranging a water-stop steel ring on the second hollow tube, the water-stop steel ring and the second hollow tube can also serve as a vertical impermeable structure to prevent rainwater from penetrating along the outer wall of the prefabricated drainage device, thereby enabling the prefabricated drainage device to have a good impermeable effect and a long service life, fully meeting the drainage needs of the bridge.

[0019] 3. The present invention can install the prefabricated drainage device at the drainage hole while the bridge is under construction, and form it with the cast-in-place structure at one time, that is, the prefabricated drainage device can be used to directly install the rainwater grate, and there is no need to excavate asphalt to install the rainwater grate later, which will not damage the integrity of the cast-in-place structure, can effectively improve the quality of bridge construction and solve the problem of water leakage from the drainage hole at the bottom of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the prefabricated drainage device for the bridge.

[0021] Figure 2 This is a top view of the portion of the bridge's prefabricated drainage device where the drainage pipe is not installed.

[0022] Figure 3 Partial top view of the installation of drainage pipes in the prefabricated drainage device of the bridge.

[0023] Figure 4 Schematic diagram of the internal orientation of the prefabricated drainage device for the bridge.

[0024] Figure 5 It is a schematic diagram of the internal orientation of a prefabricated drainage device for a bridge in another embodiment.

[0025] Figure 6 It is a schematic diagram of the built-in drainage pipe in the prior art.

[0026] Figure 7 Schematic diagram of the completion of concrete pouring.

[0027] Figure 8 This is a schematic diagram of the completed construction.

[0028] Reference numerals 10. Water drain cup; 11. Water outlet; 12. Slot; 13. Limiting area; 21. First hollow tube; 22. Second hollow tube; 23. Installation area; 30. Drain pipe; 41. First bonding layer; 42. Second bonding layer; 50. Water-stop steel ring; 60. Reinforcing ribs; 71. Concrete; 72. Asphalt; 73. Mortar protective layer; 80. Rainwater grate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0031] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0032] like Figure 1-Figure 3 As shown, the present invention provides a prefabricated water discharge device for a bridge, comprising: A water outlet cup 10, wherein the top of the water outlet cup 10 is open and a water outlet 11 is provided at the bottom; The first hollow tube 21 is connected to the water outlet 11 of the water drop cup 10; The second hollow tube 22 is sleeved outside the first hollow tube 21, so that an installation area 23 for installing the drain pipe 30 is formed between the first hollow tube 21 and the second hollow tube 22; The water-stop steel ring 50 is arranged on the second hollow tube 22, so that the second hollow tube 22 and the water-stop steel ring 50 together serve as a vertical anti-seepage structure for preventing rainwater from seeping down the outer wall of the prefabricated drainage device.

[0033] Exemplarily, the diameter of the water outlet 11 is less than or equal to the inner diameter of the first hollow tube 21, and the tops of the first hollow tube 21 and the second hollow tube 22 are connected to the bottom of the water outlet cup 10, so that rainwater flowing into the water outlet cup 10 can be discharged from the water outlet 11 and the first hollow tube 21 in sequence. Exemplarily, the tops of the first hollow tube 21 and the second hollow tube 22 are welded to the bottom of the water outlet cup 10; the hollow tubes are steel tubes.

[0034] The outer diameter of the second hollow tube 22 is smaller than the outer diameter of the water drop cup 10, so that a limiting area 13 is formed on the bottom surface of the water drop cup 10, so that the limiting area 13 can be used to clamp on the surface of the concrete layer later ( Figure 4 ), and then use the concrete 71 to limit and fix the prefabricated drainage device in the vertical direction.

[0035] In another embodiment, if Figure 5 As shown, the top of the first hollow tube 21 is welded to the bottom of the drain cup 10. Regarding the connection method of the second hollow tube 22, the top of the second hollow tube 22 can be connected to the first hollow tube 21 using a top plate, and an installation area 23 with a closed top and an open bottom can be formed for easy installation of a drain pipe.

[0036] Specifically, it also includes a drain pipe 30 installed in the installation area 23, and the inner wall and the outer wall of the drain pipe 30 are respectively connected to the first hollow pipe 21 and the second hollow pipe 22 through fixing members. Exemplarily, the fixing member is a structural adhesive. The structural adhesive can form a first bonding layer 41 between the inner wall of the drain pipe 30 and the outer wall of the first hollow pipe 21, and a second bonding layer 42 between the outer wall of the drain pipe 30 and the inner wall of the second hollow pipe 22, so that the drain pipe 30 is stably fixed on the prefabricated drainage device.

[0037] By using the first hollow tube 21 and the second hollow tube 22 to form the installation area 23, the drainage pipe 30 can be installed quickly, and the installation method of the drainage pipe 30 embedded in the drainage channel, i.e., the first hollow tube 21, in the prior art can be converted into an installation method in which the outer jacket of the drainage pipe 30 is fixed to the outer wall of the first hollow tube 21. Since the discharge channel of rainwater is the water outlet 11 and the first hollow tube 21 in sequence, the prefabricated drainage device of the present invention will not allow rainwater to contact the first bonding layer 41 (between the first hollow tube 21 and the drainage pipe 30) during the rainwater discharge process. Figure 4 ), that is, the way in which the drain pipe 30 is installed in the installation area 23 can prevent rainwater from eroding the first adhesive layer 41 between the first hollow pipe 21 and the drain pipe 30, thereby preventing a gap from appearing between the first hollow pipe 21 and the drain pipe 30 and causing rainwater to leak along the gap; in addition, unlike the existing drain pipe 30 embedded in the first hollow pipe 21, the drain pipe 30 can only be fixed by bonding the outer wall of the drain pipe 30 with the inner wall of the first hollow pipe 21 ( Figure 6 ), the present invention uses structural adhesive to bond the inner wall of the drain pipe 30 to the first hollow tube 21 and the outer wall of the drain pipe 30 to the second hollow tube 22, which can greatly increase the connection stability between the drain pipe 30 and the prefabricated drainage device.

[0038] In addition, after the drain pipe 30 is fixed in the installation area 23, in the horizontal direction, there are the first adhesive layer 41, the drain pipe 30 and the second adhesive layer 42 in sequence between the first hollow tube 21 and the second hollow tube 22. In addition to improving the fixation of the drain pipe 30 and the prefabricated drainage device, the two adhesive layers can also achieve a certain degree of anti-seepage effect. Compared with the conventional method of connecting the drain pipe 30 by embedding it in the first hollow tube 21, so that rainwater will contact the bonding layer between the drain pipe 30 and the first hollow tube 21 during the process of flowing from the water outlet cup 10 to the water outlet 11 and being discharged through the drain pipe 30, the prefabricated drainage device of the present invention may cause the first bonding layer 41 to be eroded by rainwater only when the drain pipe 30 is blocked and rainwater accumulates, and the erosion is from bottom to top. Compared with the built-in drainage pipe 30 so that the bonding layer is continuously flushed by rainwater, the erosion process is significantly slower. At the same time, only when gaps are generated in the first bonding layer 41 and the second bonding layer 42, rainwater will further penetrate into the second hollow tube 22. At this time, the second hollow tube 22 also serves as an anti-seepage member to prevent rainwater from penetrating into the concrete 71. Therefore, the prefabricated drainage device has a good anti-seepage effect and a long service life, which can fully meet the drainage needs of the bridge.

[0039] Specifically, the water drop cup 10 is also provided with a slot 12 for facilitating the installation of the cover plate. Exemplarily, the slot 12 is arranged on the upper part of the inner wall of the water drop cup 10.

[0040] Specifically, the water-stop steel ring 50 is arranged on the outer wall of the second hollow tube 22. By arranging the water-stop steel ring 50 on the second hollow tube 22, the second hollow tube 22 can not only prevent rainwater from penetrating into the concrete 71 in the lateral direction together with the first hollow tube 21, the drainage pipe 30 and the bonding layer, but also can serve as a vertical anti-seepage structure together with the water-stop steel ring 50 to prevent rainwater from penetrating due to gaps between the contact surfaces of the side wall of the prefabricated drainage device and the concrete 71 and the asphalt 72.

[0041] Specifically, the drainage pipe 30 is a PVC pipe.

[0042] like Figure 7 and Figure 8 As shown, the present invention also provides a construction method for a prefabricated bridge drainage device, comprising the following steps: S1. Cut the corresponding length of materials according to the thickness of the flange plate, including the water outlet cup 10, the first hollow tube 21, the second hollow tube 22 and the water stop steel ring 50; weld the first hollow tube 21 to the bottom surface of the water outlet cup 10 at the position corresponding to the water outlet 11, then sleeve the second hollow tube 22 on the first hollow tube 21, and weld one end of the second hollow tube 22 to the bottom surface of the water outlet cup 10; weld the water stop steel ring 50 to the outer wall of the second hollow tube 22, and complete the production of the prefabricated drainage device; S2. After the flange plate formwork of the bridge is installed and the steel bars are tied, the prefabricated drainage device is placed at the drainage hole position, and the prefabricated drainage device and the drainage hole are welded by reinforcing ribs 60 to ensure that the prefabricated drainage device will not shift or tilt during the subsequent pouring of concrete 71, thereby ensuring the accuracy of the drainage hole position; S3, pouring concrete 71, during which the concrete 71 around the prefabricated drainage device is vibrated to ensure that the concrete 71 is tightly combined with the prefabricated drainage device to avoid subsequent water seepage quality problems; S4. After the pouring of concrete 71 is completed, the cover plate is clamped on the clamping groove 12 of the water drain cup 10 to block the prefabricated drainage device to prevent excess asphalt 72 from falling from the water drain cup 10 to the bottom of the bridge during the paving process of asphalt 72; at the same time, a small amount of mortar is used to lay a mortar protective layer 73 with an angle of about 45° around the water drain cup 10 to prevent uneven rolling of the roller during the subsequent paving of asphalt 72, causing the water drain cup 10 to tilt and affect the installation of the rain grate 80; S5, paving the asphalt 72, so that the paving height of the asphalt 72 is consistent with the height of the water drop cup 10; S6. After the asphalt 72 is paved, the cover plate is removed, the rain grate 80 is installed on the water drain cup 10, and the drain pipe 30 is installed in the installation area 23. The inner wall of the drain pipe 30 is bonded to the first hollow tube 21 with structural adhesive to form a first bonding layer 41, and the outer wall of the drain pipe 30 is bonded to the second hollow tube 22 to form a second bonding layer 42, so as to ensure that the drain pipe 30 is tightly bonded to the prefabricated drainage device, ensure the stability of the connection between the drain pipe 30 and the prefabricated drainage device, and prevent rainwater from overflowing and penetrating into the concrete 71.

[0043] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A prefabricated drainage device for a bridge, characterized in that: include: A water-dropping cup, wherein the top of the water-dropping cup is open and a water outlet is provided at the bottom; A first hollow tube is connected to the water outlet of the water drop cup; A second hollow tube is sleeved outside the first hollow tube, so that an installation area for installing a drain pipe is formed between the first hollow tube and the second hollow tube; The water-stop steel ring is arranged on the second hollow tube, so that the second hollow tube and the water-stop steel ring together serve as a vertical anti-seepage structure for preventing rainwater from seeping down the outer wall of the prefabricated drainage device.

2. The prefabricated bridge drainage device according to claim 1 is characterized in that: It also includes a drainage pipe installed in the installation area, wherein the inner wall and the outer wall of the drainage pipe are respectively connected to the first hollow pipe and the second hollow pipe through fixing members.

3. The prefabricated bridge drainage device according to claim 2 is characterized in that: The fixing member is structural adhesive.

4. The prefabricated bridge drainage device according to claim 1 is characterized in that: The water outlet diameter is smaller than or equal to the inner diameter of the first hollow tube.

5. The prefabricated bridge drainage device according to claim 1 is characterized in that: The top of the second hollow tube is connected to the bottom of the water drain cup; the outer diameter of the second hollow tube is smaller than the outer diameter of the water drain cup.

6. The prefabricated bridge drainage device according to claim 1, characterized in that: The top of the second hollow tube is connected to the first hollow tube through a top plate, so that the installation area is in a state of being closed at the top and open at the bottom.

7. The prefabricated bridge drainage device according to claim 1, characterized in that: The water spout cup is also provided with a slot for facilitating installation of a cover plate.

8. A construction method for the prefabricated bridge drainage device according to claim 1, characterized in that: The following steps are involved: S1. After the flange plate formwork of the bridge is installed, the prefabricated drainage device is fixed at the drainage hole position; S2, pouring concrete, sealing the prefabricated drainage device with a cover plate after pouring, and then paving asphalt; S3. After the asphalt paving is completed, remove the cover plate, install the rain grate on the water drain cup, and install the drain pipe in the installation area.

9. The construction method of the prefabricated bridge drainage device according to claim 8, characterized in that: In step S2, the asphalt paving height is equal to the water drop cup height.

10. The construction method of the prefabricated bridge drainage device according to claim 8, characterized in that: In step S3, when installing the drain pipe, use structural adhesive to bond the inner wall of the drain pipe to the first hollow tube, and bond the outer wall of the drain pipe to the second hollow tube, so that a first bonding layer is formed between the drain pipe and the first hollow tube, and a second bonding layer is formed between the drain pipe and the second hollow tube.

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