A rigid-flexible composite hydrophobic type pavement drainage groove structure and setting method

Abstract

The application discloses a rigid-flexible composite hydrophobic pavement drainage groove structure and a setting method, and relates to the technical field of road engineering. The rigid-flexible composite hydrophobic pavement drainage groove structure comprises a groove body, a rectangular steel plate and rubber pads, the groove body is in isosceles trapezoidal structure, is uniformly distributed on the pavement according to specific pavement analysis and determination, the rubber pads are respectively arranged at the bottom and the waist position of the groove body, and are located between the rectangular steel plate and the groove body. The rigid-flexible composite structure of the rectangular steel plate and the rubber pads is adopted, the integrity of the groove body is ensured by the outer steel plate, the rubber pads play a buffering role, the stress acting on the groove of the asphalt pavement is greatly reduced, and the service life of the groove is greatly improved. In addition, the application also provides a setting method of the drainage groove, and the reasonable utilization efficiency of drainage is improved.

Description

Technical Field

[0001] This invention relates to the field of road engineering technology, and in particular to a rigid-flexible composite hydrophobic road surface drainage ditch structure and its installation method. Background Technology

[0002] Asphalt pavement grooving technology, as a simple and easy-to-construct drainage technique, is often used in superelevation transition sections of highways, i.e., sections prone to water accumulation. Existing conventional road drainage channels mostly adopt rectangular channels, which are generally cut directly into the surface layer of the asphalt pavement. The bearing edge of the rectangular channel is in direct contact with the external load. Under the impact load of vehicle wheels, the asphalt surface layer at the edge of the channel is prone to corner damage, which can lead to channel collapse and loss of drainage function. This type of drainage channel has a short service life and greatly increases the intensity of road maintenance. In addition, in order to ensure the comfort and safety of vehicles during driving, the width of existing road drainage channels is generally small, resulting in a small drainage flow rate per unit time and a slow water removal speed. To solve the above problems, there is an urgent need to design a rigid-flexible composite hydrophobic road drainage channel structure. Summary of the Invention

[0003] To address the above shortcomings, this invention provides a rigid-flexible composite hydrophobic road drainage ditch structure and installation method, which can reduce the possibility of corner damage to the ditch body, increase its drainage flow rate, improve the speed of removing accumulated water, and extend the service life of the drainage ditch.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A rigid-flexible composite hydrophobic road drainage channel structure includes:

[0006] The troughs are isosceles trapezoidal in shape and are distributed on the road surface;

[0007] A rectangular steel plate is disposed within the groove.

[0008] A rubber pad is provided inside the groove.

[0009] A further preferred embodiment of the present invention is that the tank includes a first waist and a second waist.

[0010] A further preferred embodiment of the present invention is that the rubber pad includes a first rubber pad, a second rubber pad, and a third rubber pad, wherein the first rubber pad is disposed at the first waist, the second rubber pad is disposed at the second waist, and the third rubber pad is disposed at the bottom of the trough and between the rectangular steel plate and the trough.

[0011] A further preferred embodiment of the present invention is that the rectangular steel plate is coated with a superhydrophobic coating.

[0012] A further preferred solution of the present invention is that the road surface on both sides of the groove body is cut down by 3 mm to form wing grooves, and wing plates are installed at the wing grooves.

[0013] A further preferred solution of the present invention is that the wing plate is 2 cm wide and 2 mm thick.

[0014] A further preferred solution of the present invention is that the inner bottom surface of the rectangular steel plate is 2 cm wide, the inner height is 2 cm, the steel plate is 2 mm thick, the rectangular steel plate and the wing plate are integrally structured, and a 1-mm-thick rubber pad is provided between the wing plate and the wing groove. The rubber pad and the rectangular steel plate and the wing plate are integrally structured. When the rectangular steel plate is placed in the groove body, the top surface is just flush with the road surface.

[0015] A further preferred solution of the present invention is that the rectangular steel plate is a combined steel plate, and each section is 2 m long.

[0016] A further preferred solution of the present invention is that the combination method between each section of the rectangular steel plate adopts a stepped buckle.

[0017] A further preferred solution of the present invention is that the setting method is as follows:

[0018] S1: Determine the position of the road surface drainage groove and the number of drainage grooves to be set. Specifically:

[0019] When D0 / D≥1, A = L / 5; <00000​​​​​​​​​​​​​​​​​​​​​S4: After cutting a rectangular groove in the original road surface using a grooving machine, mark the position of the cut trapezoid using a laser marking instrument;

[0028] S5: To ensure the flatness of the cut during the cutting process, a guide rail is set up along the groove direction. The cutting machine is connected to the guide rail, and then the angle of the cutting machine is adjusted so that the cutting machine blade makes a 30° angle with the vertical direction. Finally, the cutting machine is fixed so that it can only move and cut along the guide rail. Before starting the cutting, the cutting machine is moved to the cutting starting point and then fixed with a clip so that it cannot move along the guide rail. Then the height of the guide rail is adjusted so that the blade just touches the ground. The handheld cutting machine is started, and then the height of the guide rail is slowly lowered. After the blade reaches the cutting depth, the guide rail adjustment is stopped. Then the handheld cutting machine is slowly pushed along the guide rail to cut until the rectangular groove is cut into a trapezoidal groove.

[0029] S6: Using a small machine with milling function, cut the road surface on both sides of the cut trapezoidal groove by 3mm, so that the width is just enough to fit the wing plate, and ensure that the top surface of the rectangular steel plate and rubber pad is flush with the road surface after the groove is placed in the groove.

[0030] S7: After the original road surface trench construction is completed, the trench is cleaned, uneven areas are repaired, protruding areas are locally cut and leveled, and areas with granulation are repaired and leveled with epoxy resin.

[0031] S8: Apply a layer of modified emulsified asphalt adhesive layer to the bottom surface of the original road surface trench, then place the third rubber pad into the bottom of the trench to bond the third rubber pad to the bottom surface of the trench, and then bond the first rubber pad and the second rubber pad to the trench in the same way.

[0032] S9: After all the rubber pads are installed, apply a layer of modified emulsified asphalt adhesive to the surface of the rubber groove, and then put in the rectangular steel plate to bond the rectangular steel plate to the rubber pad. In addition, apply a layer of modified emulsified asphalt to the connection between the rectangular steel plates to strengthen the overall integrity and prevent water from seeping down from the connection.

[0033] S10: After the rectangular steel plate construction is completed, spray a layer of superhydrophobic material onto the inner surface of the rectangular steel plate to complete the construction.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] 1. The present invention provides a rigid-flexible composite hydrophobic road drainage trough structure. Through the rigid-flexible composite structure of rectangular steel plate and rubber pad, the outer steel plate ensures the integrity of the trough, while the rubber pad plays a buffering role, which greatly reduces the stress acting on the asphalt road surface trough and thus greatly improves the service life of the trough.

[0036] 2. The groove in this invention is an isosceles inverted trapezoid, which increases the contact area with the wheel compared to a rectangular drainage groove, thus minimizing stress concentration.

[0037] 3. In this invention, the inner surface of the rectangular steel plate is coated with a superhydrophobic material, which increases drainage efficiency and reduces the time when water remains on the road surface.

[0038] 4. The rectangular steel plates in this invention are assembled in a segmented manner, making replacement and installation more convenient. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0040] Figure 1 This is a cross-sectional view of the overall structure in this invention;

[0041] Figure 2 This is a schematic diagram of the interlocking structure between rectangular steel plates in this invention.

[0042] The markings shown in the figure are as follows: 1. Trough; 2. Rectangular steel plate; 3. First waist section; 4. Second waist section; 5. First rubber pad; 6. Second rubber pad; 7. Third rubber pad; 8. Wing plate. Detailed Implementation

[0043] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be noted that the terms "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Example

[0047] Please refer to Figure 1 and Figure 2 As shown, a preferred embodiment of the present invention provides a rigid-flexible composite hydrophobic road drainage ditch structure, including a ditch body 1 and a rectangular steel plate 2 and a rubber pad installed in the ditch body 1;

[0048] The trough 1 has an isosceles trapezoidal structure. According to the specific road surface analysis and measurement, the trough 1 is evenly distributed on the road surface, and the two symmetrical waists of the trough 1 are respectively set as the first waist 3 and the second waist 4.

[0049] The rectangular steel plate 2 is coated with a superhydrophobic coating. The rectangular steel plate 2 is a composite steel plate, with each section being 2m long. The sections of the rectangular steel plate 2 are joined together in a stepped interlocking manner.

[0050] The rubber pad includes a first rubber pad 5, a second rubber pad 6 and a third rubber pad 7. The first rubber pad 5 is located at the first waist 3, the second rubber pad 6 is located at the second waist 4, and the third rubber pad 7 is located at the bottom of the trough 1 and between the rectangular steel plate 2 and the trough 1.

[0051] By engraving trapezoidal grooves into the asphalt surface layer and adding a rectangular steel plate 2, and further inserting rubber pads between the trapezoidal grooves and the rectangular steel grooves, the load on the asphalt surface layer is further reduced, extending its service life. In addition, the inner surface of the rectangular steel plate, which is in direct contact with water, is roughened and then coated with a superhydrophobic coating to improve the drainage efficiency of the groove.

[0052] In a preferred embodiment of the present invention, 3mm deep wing grooves are cut into the road surface on both sides of the trough 1, and wing plates 8 are installed at the wing grooves. The wing plates 8 are 2cm wide and 2mm thick. The inner bottom surface of the rectangular steel plate 2 is 2cm wide, the inner side is 2cm high, and the steel plate is 2mm thick. The rectangular steel plate 2 and the wing plates 8 are designed as an integral structure. A 1mm thick rubber pad is also provided between the wing plates 8 and the wing grooves. The rubber pad, the rectangular steel plate 2, and the wing plates 8 are designed as an integral structure. After the rectangular steel plate 2 is placed in the trough 1, its top surface is flush with the road surface.

[0053] A method for installing rigid-flexible composite hydrophobic road drainage channels:

[0054] S1: Determine the position of the road surface drainage groove and the number of drainage grooves to be set, specifically:

[0055] When D0 / D ≥ 1, A = L / 5;

[0056] When 0.5 ≤ D0 / D < 1, A = L / (5 * D0 / D);

[0057] When D0 / D < 0.5, A = L / 2.5;

[0058] Where A is the number of drainage grooves to be set, L is the length of the water accumulation area,

[0059] D0 is the critical depth of water accumulation, which varies with the change of the combined slope i of the water accumulation area. When 0 < i < 0.3%, D0 is taken as 5 mm. When 0.3 ≤ i < 1%, D0 is taken as 10 mm. When i ≥ 1%, D0 is taken as 15 mm;

[0060] D is the average depth of water accumulation at the five - equal - point of the water accumulation area (mm), D = (D1 + D2 + D3 + D4 + D5) / 5;

[0061] S2: After determining the grooving position, use a laser line - drawing instrument to mark a straight cutting line on the ground to be cut;

[0062] S3: Determine the angle between the groove and the road center line, ensuring that the angle is within the range of 30° - 60°;

[0063] S4: After cutting out a rectangular groove on the original road surface by a grooving machine, use a laser line - drawing instrument to mark the position for cutting out a trapezoid;

[0064] S5: During the cutting process, to ensure the flatness of cutting, set up a guide rail along the grooving direction, connect the cutting machine to the guide rail, then adjust the angle of the cutting machine so that the cutting machine blade forms a 30° angle with the vertical direction. Finally, fix the cutting machine so that it can only move along the guide rail direction for cutting. Before starting cutting, move the cutting machine to the cutting starting point, then use a buckle to fix it so that it cannot move along the guide rail. Then adjust the height of the guide rail so that the blade just touches the road surface, start the hand - held cutting machine, and then slowly lower the height of the guide rail. When the blade reaches the cutting depth, stop adjusting the guide rail, and then manually hold the cutting machine and slowly push the cutting machine along the guide rail for cutting until the rectangular groove is cut into a trapezoidal groove;

[0065] S6: Use a small mechanical device with a milling function to cut the road surface on both sides of the cut trapezoidal groove by 3 mm, and make the width just able to fit the wing plate 8, and ensure that the top surface of the rectangular steel plate 2 and the rubber cushion block is just flush with the road surface after being placed in the groove body 1;

[0066] S7: After the original road surface trench construction is completed, the trench is cleaned, uneven areas are repaired, protruding areas are locally cut and leveled, and areas with granulation are repaired and leveled with epoxy resin.

[0067] S8: Apply a layer of modified emulsified asphalt adhesive layer to the bottom surface of the original road surface trough 1, then place the third rubber pad 7 (1mm thick) into the bottom of the trough, so that the third rubber pad 7 is bonded to the bottom surface of the trough 1, and then bond the first rubber pad 5 and the second rubber pad 6 to the trough 1 in the same way.

[0068] S9: After all the rubber pads are installed, apply a layer of modified emulsified asphalt adhesive to the surface of the rubber groove, and then put in the rectangular steel plate 2 to bond the rectangular steel plate 2 to the rubber pad. In addition, apply a layer of modified emulsified asphalt to the connection between the rectangular steel plates 2 to strengthen the overall integrity and prevent water from seeping down from the connection.

[0069] S10: After the construction of the rectangular steel plate 2 is completed, spray a layer of superhydrophobic material on the inner surface of the rectangular steel plate 2 to complete the construction.

[0070] Among them, superhydrophobic materials must satisfy the following conditions: contact angle (CA) θ > 150°, roll-off angle (SA) α < 10°. The contact angle and roll-off angle are calculated according to the following formula:

[0071] γ sv =γ sl +γ lv cosθ (1)

[0072] cosα=k2πr / (mg) (2)

[0073] Where γ sv γ represents the surface tension at the solid-gas interface. lv γ represents the surface tension at the liquid-gas interface. sl The surface tension of the solid-liquid interface is represented by r; the radius of the interface is r; the mass of the droplet is m; g is the acceleration due to gravity; and k is a proportionality constant, which is related to the interaction energy between the liquid and the solid.

[0074] Comparison of experimental data:

[0075] 1. Through the rigid-flexible composite structure of rectangular steel plate and rubber pad, the outer steel plate ensures the integrity of the groove, while the rubber pad plays a buffering role, which greatly reduces the stress acting on the asphalt pavement groove and thus greatly improves the service life of the groove.

[0076] type Maximum stress of the tank Location of occurrence Standard Grooving 0.8MPa At the top edge of the trough New type of groove 0.5MPa At the top edge of the wing slot

[0077] 2. Superhydrophobic materials increase drainage efficiency and reduce the time water remains on the road surface.

[0078] type Average flow velocity in the tank Standard Grooving 0.43m / s New type of groove 0.57m / s

[0079] Based on the above description of the embodiments, the present invention provides a rigid-flexible composite hydrophobic road drainage channel structure. Through a rigid-flexible composite structure of rectangular steel plate 2 and rubber pads, the outer steel plate ensures the integrity of the channel, while the rubber pads act as a buffer, greatly reducing the stress acting on the asphalt pavement channel 1, thereby significantly improving the service life of the groove. The channel in the present invention is an isosceles inverted trapezoid, which, compared to a rectangular drainage channel, increases the contact area with the wheels, minimizing stress concentration. The inner surface of the rectangular steel plate is coated with a superhydrophobic material, increasing drainage efficiency and reducing the road surface water retention time. The rectangular steel plate in the present invention is assembled in segments, making replacement and installation more convenient.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for installing a rigid-flexible composite hydrophobic road surface drainage channel, characterized in that, Use a rigid-flexible composite hydrophobic pavement drainage trough structure, which includes: A trough body (1), having an isosceles trapezoid structure and distributed on the road surface; the trough body (1) includes a first waist (3) and a second waist (4); A rectangular steel plate (2), disposed within the trough body (1); Rubber pads, disposed within the trough body (1); the rubber pads include a first rubber pad (5), a second rubber pad (6) and a third rubber pad (7), the first rubber pad (5) is disposed at the first waist (3), the second rubber pad (6) is disposed at the second waist (4), and the third rubber pad (7) is disposed at the bottom of the trough body (1) and between the rectangular steel plate (2) and the trough body (1); The setting method is as follows: S1: Determine the position of the pavement drainage trough and the number of drainage troughs to be set, specifically: When D0 / D≥1, A = L / 5; When 0.5 ≤ D0 / D < 1, A = L / (5 D0 / D); When D0 / D<0.5, A = L / 2.5; where A is the number of drainage troughs to be set, L is the length of the water accumulation area, D0 is the critical depth of water accumulation, which changes according to the change of the composite slope i of the water accumulation area. When 0 < i < 0.3%, D0 is taken as 5 mm. When 0.3 ≤ i < 1%, D0 is taken as 10 mm. When i ≥ 1%, D0 is taken as 15 mm; D is the average depth of water accumulation at the five equal division points of the water accumulation area, D = (D1 + D2 + D3 + D4 + D5) / 5; S2: After determining the grooving position, use a laser line marker to mark a straight cutting line on the ground to be cut; S3: Determine the angle between the groove and the road center line, ensuring that the angle is within the range of 30° to 60°; S4: After cutting out a rectangular trough body on the original road surface by a grooving machine, use a laser line marker to mark the position of the cut trapezoid; S5: During the cutting process, to ensure the flatness of the cutting, install a guide rail along the grooving direction, connect the cutting machine to the guide rail, then adjust the angle of the cutting machine so that the cutting blade forms an angle of 30° with the vertical direction. Finally, fix the cutting machine so that it can only move along the guide rail for cutting. Before starting the cutting, move the cutting machine to the cutting starting point, and then use a buckle to fix it so that it cannot move along the guide rail. Then adjust the height of the guide rail so that the blade just touches the road surface. Then start the hand-held cutting machine, and then slowly lower the height of the guide rail. After the blade reaches the cutting depth, stop adjusting the guide rail, and then manually hold the cutting machine and slowly push the cutting machine along the guide rail for cutting until the rectangular trough is cut into a trapezoidal trough; S6: Use a small mechanical device with a milling function to cut the road surface on both sides of the cut trapezoidal trough by 3 mm, and make the width just able to fit the wing plate (8), and ensure that the top surface of the rectangular steel plate (2) and the rubber pads is just flush with the road surface after being placed in the trough body (1); S7: After the construction of the original road surface trough body is completed, clean the trough body, repair the uneven positions, cut and level the protruding places locally, and use epoxy resin to repair and level the places where degranulation occurs; S8: Apply a layer of modified emulsified asphalt bonding layer to the bottom surface of the original road surface trough (1), then place the third rubber pad (7) into the bottom of the trough so that the third rubber pad (7) is bonded to the bottom surface of the trough (1), and then bond the first rubber pad (5) and the second rubber pad (6) to the trough (1) in the same way. S9: After all the rubber pads are installed, a layer of modified emulsified asphalt adhesive layer is applied to the surface of the rubber groove, and then the rectangular steel plate (2) is placed in so that the rectangular steel plate (2) is bonded to the rubber pad. In addition, a layer of modified emulsified asphalt is also applied to the connection between the rectangular steel plates (2) to strengthen the integrity and prevent water from seeping down from the connection. S10: After the rectangular steel plate (2) is completed, spray a layer of superhydrophobic material on the inner surface of the rectangular steel plate (2) to complete the construction.

2. The method for setting up a rigid-flexible composite hydrophobic road drainage channel according to claim 1, characterized in that, The rectangular steel plate (2) is coated with a superhydrophobic coating.

3. The method for setting up a rigid-flexible composite hydrophobic road drainage channel according to claim 1, characterized in that, The road surface on both sides of the trough (1) is cut with a 3mm deep wing groove, and a wing plate (8) is installed at the wing groove.

4. The method for setting up a rigid-flexible composite hydrophobic road drainage channel according to claim 3, characterized in that, The wing plate (8) is 2cm wide and 2mm thick.

5. The method for setting up a rigid-flexible composite hydrophobic road drainage channel according to claim 4, characterized in that, The rectangular steel plate (2) has an inner bottom width of 2cm, an inner height of 2cm, and a steel plate thickness of 2mm. The rectangular steel plate (2) and the wing plate (8) are designed as an integral structure. A 1mm thick rubber pad is also provided between the wing plate (8) and the wing groove. The rubber pad, the rectangular steel plate (2), and the wing plate (8) are designed as an integral structure. After the rectangular steel plate (2) is placed in the groove (1), its top surface is flush with the road surface.

6. The method for setting up a rigid-flexible composite hydrophobic road drainage channel according to claim 1, characterized in that, The rectangular steel plate (2) is a composite steel plate, with each section being 2m long.

7. The method for setting up a rigid-flexible composite hydrophobic road drainage channel according to claim 1, characterized in that, The rectangular steel plate (2) is assembled in a stepped interlocking manner between each segment.

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