Special-shaped cover plate for side drainage ditch of highway tunnel

Abstract

The utility model relates to the technical field of highway tunnel drainage, in particular to a highway tunnel side type drainage ditch special-shaped cover plate which is an open trench type cover plate, the open trench type cover plate is flush with a tunnel pavement and arranged on a side type drainage ditch, and the open trench type cover plate comprises an open trench part and a cover plate part. The open ditch part is used for collecting and discharging operation cleaning sewage, fire fighting water, rainwater and the like, and the cover plate part is movably connected with the side type drainage ditch body; the cover plate is used for solving the problems that in the prior art, a side type drainage blind ditch cover plate is buried below a tunnel pavement, clogging objects are difficult to clean, and a common rectangular cover plate is difficult to achieve sewage cleaning and separation. Through the open trench type cover plate design, the requirement for high displacement of the tunnel can be met, and the requirement for cleaning and separating can also be met; the drainage ditch convenient to open is formed through the cover plate part and the connecting part, the device structure is simplified, and the effect of convenience of overhauling and cleaning the blind ditch is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of highway tunnel drainage, and more specifically to a special-shaped cover plate of a side drainage ditch of a highway tunnel. Background Art

[0002] In order to facilitate the drainage of operational cleaning water, firefighting water and other wastewater and prevent these wastewaters from overflowing on the road surface, side drainage ditches are set up on the roadside, which together with the side drainage ditches constitute the roadside ditch drainage system of the highway tunnel. According to the "clean and dirty separation" principle required by the current highway tunnel design specifications, the side drainage ditches are in an inverted Ω shape, arranged on both sides of the tunnel pavement, flush with the main pavement, and directly receive accumulated water, operational cleaning water and wastewater from the road surface; the side drainage ditches are generally buried 50 to 60 cm below the pavement elevation, and receive the surrounding rock fissure water behind the lining through the transverse drainage blind pipe. The blind ditch cover of the side drainage ditch is buried below the pavement elevation and the cover cannot be opened.

[0003] In order to clean up the blockage of silt, crystals and other substances in the side drainage ditch during operation, side drainage ditch inspection wells are set up every 50 to 100 meters. The elevation of the inspection well cover is level with the road surface elevation. During operation, the silt blockage in the side drainage ditch can be inspected and cleaned by opening the inspection well cover. Current maintenance experience shows that this design method brings many inconveniences to the cleaning of the tunnel side drainage ditch. The side drainage ditch has poor maintainability during operation. When it is seriously blocked, it will affect the discharge of fissure water behind the tunnel lining, leading to a series of problems such as water gushing on the tunnel pavement and cracking of the lining, which endangers the safety of the tunnel structure and affects the normal operation of tunnel traffic.

[0004] In order to improve the maintainability of the side drains of highway tunnels during operation, it is necessary to make the cover of the side drains easy to open to facilitate regular maintenance of the side drains. However, if the cover of the side drains is placed at the same elevation as the tunnel pavement, there will be two main problems:

[0005] 1) The current type of drainage ditch cover lacks drainage function and cannot meet the requirements of "clean and dirty separation";

[0006] 2) At present, the cover of the side drainage ditch is a concrete rectangular cover with a thickness of 15 to 30 cm. If the cover is directly set on both sides of the tunnel pavement, the cover is generally located on both sides of the road traffic markings, which may be directly subjected to the power of heavy-loaded vehicles, resulting in cracks, posing a huge safety hazard to traffic in the tunnel.

[0007] It can be seen that there is an urgent need for a tunnel side drainage ditch cover that can meet the needs of "clean and dirty separation" and the safety of traffic in the tunnel. Utility Model Content

[0008] The utility model aims to overcome at least one defect (deficiency) of the above-mentioned prior art and provides a special-shaped cover plate for the side drainage ditch of a highway tunnel, which is used to solve the problems that the silt blockage in the side drainage ditch is difficult to clean, the cleaning inspection well occupies the lane in the tunnel, and affects the passage of vehicles; the cover plate design is insufficient to meet the problem of separation of cleaning and sewage; the cover plate is located on both sides of the tunnel pavement and is easily crushed and cracked.

[0009] The technical solution adopted by the utility model is a special-shaped cover plate for the side drainage ditch of a highway tunnel, wherein the special-shaped cover plate is an open ditch cover plate, the open ditch cover plate is flush with the tunnel pavement and is arranged on the side drainage ditch, the open ditch cover plate comprises an open ditch portion and a cover plate portion, the open ditch portion is used to collect and discharge operational cleaning sewage, fire water and rainwater, and both ends of the cover plate portion are movably connected to the ditch body of the side drainage ditch.

[0010] The integrated design of the open ditch cover can meet the high drainage demand of the tunnel and the design requirements of clean and pollutant separation. At the same time, the open ditch cover is flush with the tunnel pavement and is made of high-strength material, so that it is not easily damaged by the rolling of tunnel vehicles. The cover part arranged on the side drainage ditch is convenient for opening during the operation period to clean up the silt in the blind ditch in the drainage ditch, thereby improving the convenience of maintenance and not affecting the normal passage of the tunnel.

[0011] The thickness of the cover plate portion gradually decreases from the outer end to the inner end, and the ratio of the outer end thickness H1 of the cover plate portion close to the tunnel side wall to the inner end thickness H2 of the cover plate portion close to the tunnel road surface is in the range of 2:5-1:2.

[0012] It is beneficial to have a cover plate portion whose thickness decreases along one side, which can not only save the manufacturing materials of the cover plate portion and shorten the construction time, but also reduce the weight of the cover plate portion, saving effort and time for maintenance personnel when opening the cover plate portion; it is beneficial to provide a stable structure for the bearing capacity of the cover plate portion through a specific ratio range of the outer end thickness of the cover plate portion and the inner end thickness of the cover plate portion.

[0013] The cover plate portion comprises an upper cover surface and a lower cover surface, wherein the upper cover surface is flush with the tunnel pavement, and the lower cover surface and the wall of the side drainage ditch form a closed cavity.

[0014] It is beneficial to make the upper cover flush with the tunnel pavement, which is not only convenient for collecting rainwater, fire water and operational cleaning sewage on the tunnel pavement and discharging them along the open ditch of the upper cover, but also helps to hide the cover part visually; it is also beneficial to avoid being crushed by vehicles passing through the tunnel; it is beneficial to form a closed cavity through the lower cover and the side drainage ditch, so that the tunnel drainage can achieve the effect of separating clean and dirty water.

[0015] The lower cover surface comprises an open ditch bottom section, a curved surface section, and a plane section, wherein the curved surface section connects the open ditch bottom section and the inner end plane section of the plane section.

[0016] It is beneficial to improve the flatness and convenience of connecting the side drainage ditch through the plane section, and increase the drainage width of the drainage ditch; it is beneficial to minimize the volume of the cover plate portion whose thickness is reduced along one side through the connection of the first curved surface and the second curved surface, thereby reducing the amount of material used and its weight, so that maintenance personnel can save effort and time when opening the cover plate portion, and it is also beneficial for the side of the cover plate close to the road surface to transfer the force to one end of the open ditch side wall of the cover plate when it is loaded by traffic vehicles, thereby reducing the possibility of stress concentration.

[0017] The open groove portion is in the shape of a groove, and the width of the groove close to the side wall of the open groove of the cover plate is L2. The depth of the groove from the arc surface section close to the bottom section of the open groove is H1-H2, and gradually decreases toward the arc surface section and the plane section close to the inner end plane section until the position where the arc surface section and the plane section are connected. The radii of the connection at both ends of the arc surface section are R1 and R2 respectively, and R1=R2. The center of the circle is respectively located on the upper and lower sides of the cover plate, and the ratio to the height H1 of the cover plate open groove side wall of the cover plate portion is in the range of 1:2-2:3.

[0018] It is beneficial to pass through a specific ratio range of the radius of the arc surface section connection and the height of the side wall of the open ditch of the cover plate, and reduce the volume and weight of the open ditch part without affecting the bearing capacity of the cover plate part, so that maintenance personnel can save effort and time when opening the cover plate part.

[0019] The cover plate portion includes a side wall of the cover plate open ditch, and the movable connection surface between the cover plate portion and the side drainage ditch includes a first connection surface and a second connection surface, the first connection surface is connected to the bottom of the side wall of the cover plate open ditch, and the second connection surface is connected to the bottom of the outer end plane section of the plane section.

[0020] It is beneficial to connect with the outer end plane section and the inner end plane section respectively through the first connecting surface and the second connecting surface, thereby increasing the sealing performance of the cover plate part and the wall of the side drainage ditch.

[0021] The cover plate part also includes a front splicing surface and a rear splicing surface. Two adjacent open trench cover plates are spliced ​​with each other along the length direction of the tunnel through a front splicing surface and another rear splicing surface. The splicing surfaces are splicing grooves.

[0022] It is beneficial to splice multiple open-ditch cover plates along the length of the tunnel through the splicing surface, thereby improving construction flexibility and convenience; it is beneficial to improve the sealing through the splicing surface, thereby enhancing the drainage and sewage separation effect in the tunnel; it is beneficial to reduce the installation of splicing parts through the splicing groove, directly fill in the water-stop strip to shorten the construction time, simplify the construction process, and improve the water-stop performance of the joint.

[0023] The splicing surface is a splicing wedge, and a water-stopping rubber strip is filled in the splicing wedge.

[0024] It is beneficial to complete the sealing connection of the splicing surface through the splicing wedge formed by one side convex outward and one side concave inward. The construction and installation are simple, the construction time is saved, and a better cleaning and separation effect can be achieved.

[0025] The splicing surface is a splicing piece.

[0026] It is beneficial to seal the joint surface by embedding the water-stop rubber strip into the joint wedge, and its water-stop sealing performance is good, which can prevent road sewage from flowing into the drainage ditch through the cover plate joint, and can better achieve the effect of cleaning and sewage separation.

[0027] Compared with the prior art, the beneficial effects of the utility model are as follows: through the integrated design of the open ditch cover, it can meet the needs of high drainage volume in the tunnel and the needs of clean and dirty separation. At the same time, the open ditch cover is flush with the tunnel pavement, making it less susceptible to damage caused by the rolling of tunnel vehicles; it is beneficial to open and clean the silt in the blind ditch in the drainage ditch during the operation period through the cover portion arranged on the side drainage ditch, thereby improving the convenience of maintenance and not affecting the normal passage of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of the special-shaped cover plate of the present utility model.

[0029] Figure 2 It is a top view of the special-shaped cover plate of the utility model.

[0030] Figure 3 It is a middle cross-sectional view of the special-shaped cover plate of the present utility model.

[0031] Figure 4 It is a cross-sectional view of the wedge opening at the first end of the special-shaped cover plate of the present invention.

[0032] Figure 5 It is a cross-sectional view of the wedge opening at the rear end of the special-shaped cover plate of the present invention.

[0033] Figure 6 It is a longitudinal cross-sectional view of the wedge opening of the special-shaped cover plate of the utility model. DETAILED DESCRIPTION

[0034] The drawings of the present invention are only used for illustrative purposes and cannot be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] Example

[0036] like Figure 1-6 As shown, this embodiment provides a special-shaped cover plate for the side drainage ditch of a highway tunnel, wherein the special-shaped cover plate is an open ditch cover plate, which is flush with the tunnel pavement and is arranged on the side drainage ditch, and the open ditch cover plate includes an open ditch portion and a cover plate portion, the open ditch portion is used to collect and discharge operational cleaning sewage, fire water and rainwater, and both ends of the cover plate portion are movably connected to the side drainage ditch body.

[0037] In this embodiment, the drainage ditch on the original tunnel road side is embedded on the special-shaped cover plate, and the buried elevation of the special-shaped cover plate installed on the side drainage ditch is raised so that the setting elevation of the special-shaped cover plate is flush with the road surface. That is, the special-shaped cover plate no longer lays the drainage ditch cover plate below the tunnel road surface, and no longer lays the "Ω" road side open ditch. Instead, the special-shaped cover plate is laid on both sides of the tunnel road side, and the open ditch part of the special-shaped cover plate becomes an "open drainage ditch". The inspection and maintenance of the side drainage ditch can be achieved by opening the open ditch cover plate at any position of the side drainage ditch.

[0038] In this embodiment, the open trench cover plate is prefabricated from UHPC high-strength concrete and is a special-shaped cover plate with different thicknesses. The length of the open trench cover plate is 50 cm.

[0039] In this embodiment, the special-shaped cover plate on the side drain ditch is arranged with two kinds of longitudinal and transverse steel bars, with a single length of 46 cm and 49 cm respectively, and a diameter of 10 mm. Six transverse steel bars are dispersed along the longitudinal direction of the cover plate, with the two ends of the steel bars 2 cm away from the two ends of the cover plate respectively, and the placement position is 1.5 cm away from the bottom of the thickest and thinnest parts of the cover plate. Five longitudinal steel bars are dispersed from the head end to the tail end of the transverse steel bar and placed on the transverse steel bar.

[0040] In this embodiment, the width of the open ditch cover is 50 cm, and it is divided into 6 parts. 1 is the open ditch side wall of the cover, which is 3 cm thick and close to one side of the cable trench. 2 is the bottom section of the open ditch, 3 is the curved surface section, 4 is the inner end plane section of the plane section, 5 is the outer end plane section of the plane section, and 6 is the open ditch drainage space of the cover. The cover 1 and 5 are respectively connected to the ditch wall of the side drainage ditch to form a simply supported beam bearing structure.

[0041] The thickness of the cover plate portion gradually decreases from the outer end to the inner end, and the ratio of the outer end thickness H1 of the cover plate portion close to the tunnel side wall to the inner end thickness H2 of the cover plate portion close to the tunnel road surface is in the range of 2:5-1:2.

[0042] In this embodiment, the open groove cover is groove-shaped, with a longitudinal length of 50 cm, consisting of a concave head and a long handle. The thickness gradually decreases from the head to the tail end of the handle. The head H1 is the thickest, which is 13 cm, and the tail end H2 is the thinnest, which is 5 cm.

[0043] The cover plate portion comprises an upper cover surface and a lower cover surface, wherein the upper cover surface is flush with the tunnel pavement, and the lower cover surface and the wall of the side drainage ditch form a closed cavity.

[0044] In this embodiment, the upper cover is flush with the tunnel pavement, which is not only convenient for collecting rainwater, firefighting water, and operational cleaning sewage on the tunnel pavement and discharging them along the open ditch portion of the upper cover, but also helps to avoid rolling over by vehicles passing through the tunnel. The lower cover and the side drainage ditch form a closed cavity, so that the tunnel drainage can achieve the effect of separating clean and dirty water.

[0045] In this embodiment, parts 2 and 3 of the bottom section of the cover plate open ditch are connected by an arc with a radius of 10 cm, and parts 3 and 4 are also connected by an arc with the same radius. The horizontal widths of parts 2, 3 and 4 are 10 cm, 12 cm and 12 cm respectively, the horizontal width of the outer end plane section 5 of the plane section is 12 cm, and the horizontal width of the cover plate open ditch side wall 1 is 4 cm, which can effectively ensure that the drainage space is basically consistent with the "Ω" roadside open ditch drainage space in the traditional design.

[0046] In this embodiment, the side of the open ditch cover plate close to the tunnel pavement is the inner end, and the side away from the tunnel pavement is the outer end. The length of the outer end plane section is 12 cm, and the inner end plane section is composed of two parts, the cover plate open ditch side wall 1 and the cover plate open ditch bottom section, with a total length of 14 cm.

[0047] The open ditch portion is in the shape of a groove, and the width of the groove near the side wall of the open ditch of the cover plate is L2. The depth of the groove from the arc surface section near the bottom section of the open ditch is H1-H2, and gradually decreases toward the arc surface section and the plane section near the inner end plane section until the position where the arc surface section and the plane section are connected. The radii at the connection points at both ends of the arc surface section are R1 and R2, and R1=R2. The centers of the circles are located at the upper and lower sides of the cover plate, respectively, and the ratio to the height H1 of the side wall of the open ditch of the cover plate portion is in the range of 1:2-2:3. In this embodiment, the open ditch cover plate is in the shape of a groove, and the concave groove is the open ditch portion for drainage. The depth of the open ditch portion near the side wall of the open ditch of the cover plate is 7 cm, and gradually decreases toward the arc surface section and the plane section near the inner end plane section until the position where the arc surface section and the plane section are connected.

[0048] The cover plate portion includes a side wall of the cover plate open ditch, and the movable connection surface between the cover plate portion and the side drainage ditch includes a first connection surface and a second connection surface, the first connection surface is connected to the bottom of the side wall 1 of the cover plate open ditch, and the second connection surface is connected to the bottom of the outer end plane section 5 of the plane section.

[0049] In this embodiment, the first connecting surface and the second connecting surface are respectively connected to the bottom of the open ditch side wall 1 of the cover plate and the bottom of the outer end plane section 5 of the plane section, thereby increasing the sealing performance of the cover plate part and the side drainage ditch.

[0050] The cover plate part also includes a front splicing surface and a rear splicing surface. Two adjacent open trench cover plates are spliced ​​with each other along the length direction of the tunnel through a front splicing surface and another rear splicing surface. The splicing surfaces are splicing grooves.

[0051] In this embodiment, the splicing grooves are arranged on both sides of the open groove cover along the length direction of the tunnel, and grooves with a width and height of 1.5 cm are reserved inward from the longitudinal head and tail respectively, so as to form a sealed joint when two adjacent open groove cover plates are spliced ​​longitudinally.

[0052] In this embodiment, in order to improve the waterproof effect of the joints of the special-shaped cover plate in the longitudinal laying direction, different design methods are adopted at the two ends of the special-shaped cover plate, that is, the transverse wedge 7 at the head end (section CC) and the transverse wedge 8 at the tail end (section EE) are respectively provided with transverse wedges, one side is convex outwardly and the other side is concave inwardly, with consistent size and position, which are used for splicing the special-shaped cover plate in the longitudinal laying direction.

[0053] In this embodiment, the detailed structures of the transverse wedge opening 7 at the head end and the transverse wedge opening 8 at the tail end of the special-shaped cover plate are shown in the longitudinal section AA and the longitudinal section BB respectively. The transverse wedge opening 7 at the head end is in the shape of a concave trapezoid with a depth of 1 cm. The upper base of the trapezoid is 2 cm long, the lower base of the trapezoid is 2.5 cm long, and the right-angled side is close to the upper side of the cover plate and is 1 cm long.

[0054] The splicing surface is a splicing wedge, and a water-stopping rubber strip is filled in the splicing wedge.

[0055] In this embodiment, along the longitudinal laying direction of the special-shaped cover plate, the head end transverse wedge 7 and the tail end transverse wedge 8 are spliced ​​with each other, and the contact surface 9 of the wedge is filled with a waterproof rubber strip to improve the waterproof property of the joint and prevent road water from seeping into the drainage ditch and affecting the cleaning and separation effect.

[0056] The splicing surface is a splicing piece.

[0057] In this embodiment, the splicing piece is a waterproof rubber strip, and the width of the waterproof rubber strip is 0.25 cm.

[0058] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical solution of the utility model, and are not intended to limit the specific implementation methods of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A special-shaped cover plate for side drainage ditch of a highway tunnel, characterized in that: The special-shaped cover plate is an open ditch cover plate, which is flush with the tunnel pavement and is arranged on the side drainage ditch. The open ditch cover plate includes an open ditch portion and a cover plate portion. The open ditch portion is used to collect and discharge operational cleaning sewage, fire water and rainwater. The two ends of the cover plate portion are movably connected to the ditch body of the side drainage ditch.

2. The special-shaped cover plate for the side drainage ditch of a highway tunnel according to claim 1, characterized in that: The thickness of the cover plate portion gradually decreases from the outer end to the inner end, and the ratio of the outer end thickness H1 of the cover plate portion close to the tunnel side wall to the inner end thickness H2 of the cover plate portion close to the tunnel road surface is in the range of 2:5-1:

2.

3. The special-shaped cover plate for the side drainage ditch of a highway tunnel according to claim 1, characterized in that: The cover plate portion comprises an upper cover surface and a lower cover surface, wherein the upper cover surface is flush with the tunnel pavement, and the lower cover surface and the wall of the side drainage ditch form a closed cavity.

4. The special-shaped cover plate for the side drainage ditch of a highway tunnel according to claim 3 is characterized in that: The lower cover surface comprises an open ditch bottom section, a plane section and a curved surface section, wherein the curved surface section is connected to the open ditch bottom section and the inner end plane section of the plane section.

5. The special-shaped cover plate for the side drainage ditch of a highway tunnel according to claim 4, characterized in that: The cover plate portion includes a side wall of the cover plate open ditch, and the movable connection surface between the cover plate portion and the side drainage ditch includes a first connection surface and a second connection surface, the first connection surface is connected to the bottom of the side wall of the cover plate open ditch, and the second connection surface is connected to the bottom of the outer end plane section of the plane section.

6. The special-shaped cover plate for the side drainage ditch of a highway tunnel according to any one of claims 1 to 5, characterized in that: The cover plate part also includes a front splicing surface and a rear splicing surface. Two adjacent open trench cover plates are spliced ​​with each other along the length direction of the tunnel through a front splicing surface and another rear splicing surface. The splicing surfaces are splicing grooves.

7. The special-shaped cover plate for the side drainage ditch of a highway tunnel according to claim 6, characterized in that: The splicing surface is a splicing wedge.

8. The special-shaped cover plate for the side drainage ditch of a highway tunnel according to claim 6, characterized in that: The splicing surface is a splicing piece.

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