Overhaul facility for waterproof and drainage system of highway tunnel
By setting up maintenance facilities in cross passages, vertical shafts, and horizontal tunnels within highway tunnels, combined with gaskets and negative pressure water diversion devices, the problems of insufficient space in tunnel maintenance passages and traffic interference have been solved, achieving efficient and safe maintenance and dredging results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI LUAN HEXIANG EXPRESSWAY CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-05-12
AI Technical Summary
Existing highway tunnel drainage and waterproofing system maintenance facilities suffer from problems such as limited maintenance access space, traffic control affecting traffic safety, complex construction, and inconvenience for operating intelligent testing equipment.
A maintenance facility consisting of a transverse passage, a vertical shaft section, a horizontal tunnel section, and gaskets was designed. The transverse passage is set horizontally along the tunnel sidewall, the vertical shaft section is connected to the transverse passage, the horizontal tunnel section is connected to a longitudinal drainage pipe, and the gaskets form a water passage. Combined with a negative pressure water diversion device, convenient maintenance and dredging can be achieved.
It provides convenient maintenance space, reduces traffic interference, lowers construction costs, increases operating space, supports intelligent detection, promptly removes accumulated water, and improves maintenance efficiency and safety.
Smart Images
Figure CN224228682U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel maintenance technology, specifically to a maintenance facility for a highway tunnel drainage system. Background Technology
[0002] Drainage and waterproofing structures are crucial for ensuring the operation of highway tunnels. Substances carried by flowing groundwater accumulate in drainage pipes and ditches. As highway tunnels are underground, concealed engineering projects, quality control during tunnel drainage and waterproofing construction remains challenging. Construction quality issues such as discontinuous cross-sections, uneven ditch walls, and blockages caused by construction waste frequently arise, further exacerbating drainage system blockages and leading to a series of tunnel safety hazards. For example, blocked drainage pipes can cause water accumulation inside the tunnel, seeping into lighting and ventilation systems, and even eroding cracks in the tunnel's concrete structure, weakening its stability. Therefore, regular inspection, maintenance, and dredging of the tunnel drainage and waterproofing system are necessary to ensure its reliability and enhance the tunnel's operational safety and resilience.
[0003] In existing tunnel structures, different drainage and waterproofing structures have different maintenance methods. Drainage ditches are set on both sides of the road, and the covers can be opened directly for maintenance. Longitudinal and circumferential drainage pipes are inspected by small maintenance robots through inlets set in the tunnel sidewalls. The central drainage ditch located below the road surface has maintenance manholes set down from the road surface for maintenance. However, conventional maintenance manholes are set at intervals in the driving lane. During inspection, traffic control is required, which affects tunnel traffic and is prone to traffic safety hazards. Moreover, the entrances of maintenance manholes are mostly set in the middle of the road. This setting makes it impossible to increase the space. The limited operating space inside the manhole is not conducive to the operation of intelligent inspection equipment or inspection vehicles, and is even more unfavorable for subsequent drainage pipe dredging.
[0004] Therefore, developing a maintenance facility for a highway tunnel drainage system is not only of urgent research value, but also has good economic benefits and industrial application potential. This is the driving force and foundation for the completion of this utility model. Utility Model Content
[0005] In order to overcome the defects of the prior art as mentioned above, the inventors of this utility model have conducted in-depth research and, after a great deal of creative work, have completed this utility model.
[0006] Specifically, the technical problem to be solved by this utility model is to provide a maintenance facility for a highway tunnel drainage system, so as to solve the technical problems of existing highway tunnel maintenance channels.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A maintenance facility for a highway tunnel drainage system, the maintenance facility comprising:
[0009] Transverse passages are opened laterally on the sidewalls of the tunnel and are arranged at intervals along the longitudinal direction of the tunnel;
[0010] The vertical shaft section is located underground in the horizontal passage. The upper opening end is the maintenance entrance, which is flush with the ground of the horizontal passage and covered with a movable cover plate.
[0011] The horizontal tunnel section connects to the lower end of the vertical shaft section and extends to the central drainage ditch, connecting the two and connecting the longitudinal drainage pipe along the extension path.
[0012] The gaskets are laid in sections at the bottom of the tunnel section, with raised sides that fit against the sidewalls of the tunnel section. The center is a groove to form a water passage. The section below the connection with the longitudinal drainage pipe is the front gasket, and the section laid to the central drainage ditch is the rear gasket. The inclination angle of the raised parts on both sides of the front gasket can be adjusted.
[0013] The drainage pipeline is laid inside the horizontal tunnel section and the vertical shaft section. The water inlet end is connected to the water passage of the rear gasket, and the water outlet end extends to the horizontal channel and is connected to the water diversion device in the horizontal channel.
[0014] In this utility model, as an improvement, the transverse passages of the up-going tunnel and the down-going tunnel are located at the same transverse position and are connected to form an emergency passage.
[0015] In this utility model, as an improvement, the maintenance channels are arranged at intervals along the longitudinal direction of the tunnel, and the distance between two maintenance channels is less than 350m.
[0016] In this utility model, as an improvement, the longitudinal drainage pipe passes through the side wall of the flat tunnel section and communicates with the inner cavity of the flat tunnel section.
[0017] In this utility model, as an improvement, the gasket is a silicone gasket with a hardness between 20-30A, and the interior of the raised part of the front gasket is an air bladder, with the air inlet of the air bladder located on the side wall of the gasket.
[0018] In this utility model, as an improvement, the water passage formed by the segmented laying of gaskets is inclined along the extension direction of the flat tunnel section, and the elevation of the bottom surface of the groove of the front gasket is higher than that of the bottom surface of the groove of the rear gasket.
[0019] In this utility model, as an improvement, the drainage pipeline located in the flat tunnel section is buried under the gasket, and the water inlet end of the drainage pipeline extends to the connection between the front gasket and the central drainage ditch, and is connected to the water passage at the connection.
[0020] In this utility model, as an improvement, the inner walls of the raised portions on both sides of the gasket are inclined in an inverted cone shape from the top to the bottom, and the outer walls are attached to the side walls of the flat hole section. The top of the raised portion of the front gasket is attached to the bottom of the longitudinal drainage pipe passage.
[0021] In this utility model, as an improvement, the water-drawing device is a negative pressure water-drawing bag or a water pump.
[0022] Compared with the prior art, the beneficial effects of this utility model are:
[0023] (1) In this application, the maintenance passage is set up based on the cross passage, and provides maintenance space for both the up and down passages. The entrance of the maintenance passage is set at the cross passage, so there is no need for traffic control during maintenance, which improves the convenience and safety of tunnel drainage facility inspection.
[0024] (2) Make full use of existing tunnel facilities to reduce construction costs. This method can be applied to the initial construction phase or the later renovation of existing tunnels without the need to adjust the tunnel structure, thus reducing construction steps.
[0025] (3) No longer constrained by the needs of tunnel construction, the space inside the maintenance passage is increased to meet the needs of testing equipment and testing vehicles, and to facilitate subsequent dredging. At the same time, pads are laid in the maintenance passage, and impurities are avoided from accumulating in the maintenance passage by replacing the pads, which facilitates the passage of maintenance facilities.
[0026] (4) The maintenance passage is equipped with a drainage mechanism. By checking the amount of water in the maintenance passage, it can be determined whether the central drainage ditch or longitudinal drainage pipe connected to the maintenance passage is blocked. Before maintenance, the water caused by the blockage can be drained, which is convenient for subsequent observation and photography by the testing equipment. Attached Figure Description
[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0028] Figure 1 This is a schematic diagram of the structure of the maintenance passage of this utility model located between the up and down tunnels;
[0029] Figure 2 for Figure 1 A structural sectional view of section AA in the middle;
[0030] Figure 3 This is a schematic diagram of the structure of the maintenance access channel of this utility model located inside a single-tube tunnel;
[0031] Figure 4 This is a schematic diagram of the maintenance passage of this utility model;
[0032] Figure 5 This is a schematic diagram of the structure of the gasket of this utility model;
[0033] Figure 6 This is a schematic diagram of the structure of the front gasket of this utility model when it is not inflated;
[0034] Figure 7 This is a schematic diagram of the structure of the front gasket of this utility model after it is inflated;
[0035] Figure 8 This is a schematic diagram of the structure of the rear gasket of this utility model;
[0036] Figure 9 This is a schematic diagram of the drainage pipeline and water diversion device of this utility model;
[0037] In the diagram: 1. Horizontal passage, 2. Vertical shaft section, 3. Horizontal tunnel section, 4. Central drainage ditch, 5. Longitudinal drainage pipe, 6. Drainage side ditch, 7. Front gasket, 8. Movable cover plate, 9. Rear gasket, 10. Middle gasket, 11. Airbag, 12. Drain outlet, 13. Drainage pipeline, 14. Negative pressure water intake bag, 15. Water pump. Detailed Implementation
[0038] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0039] like Figure 1 As shown, a maintenance facility for a highway tunnel drainage system comprises three parts. First, a transverse passage 1 is opened laterally along the tunnel sidewall. The depth of the transverse passage 1 can be set based on the size of the maintenance equipment or the length of the maintenance vehicle. The width and height of the transverse passage cross section are 2m and 2.5m, respectively. Inside the transverse passage 1, a maintenance passage front section - shaft section 2 is drilled downward from the ground. The upper end of the shaft section 2 is the maintenance passage entrance. The cross-sectional width and length of the entrance are between 1m and 1.5m. The upper entrance of the shaft section 2 is flush with the ground of the transverse passage 1, and the entrance is covered with a movable cover plate 8.
[0040] The rear section of the passage is the horizontal tunnel section 3. The front end of the horizontal tunnel section 3 is connected to the lower end of the vertical shaft section 2, and the rear end extends to the central drainage ditch 4. The vertical shaft section 2, the horizontal tunnel section 3 and the central drainage ditch 4 are connected. The height and width of the horizontal tunnel section 3 are between 0.6m and 0.8m, which meets the operating space requirements of personnel and mechanized equipment.
[0041] The horizontal tunnel section 3 passes through the location of the longitudinal drainage pipe 5, cuts off the longitudinal drainage pipe 5, and the ends of the longitudinal drainage pipe 5 on both sides of the cut-off point penetrate the side wall of the horizontal tunnel section 3 and connect to the inner cavity of the horizontal tunnel section 3. The water accumulated in the circumferential and transverse drainage pipes in the tunnel waterproofing and drainage system flows into the horizontal tunnel section through the longitudinal drainage pipe 5 and flows into the central drainage ditch 4 through the horizontal tunnel section.
[0042] The tunnel section 3 and the drainage ditch 6 can be connected by a pipeline or the bottom of the drainage ditch 6 can be used as the side wall of the tunnel section 3. An equipment passage can be opened at the bottom and a sealing plate or sealing plug can be installed at the passage. In special circumstances where it is not possible to open the cover plate to inspect the drainage ditch 6 inside the tunnel, it can be inspected and repaired through the tunnel section 3.
[0043] The horizontal tunnel section 3 connects the longitudinal drainage pipe 5 and the central drainage ditch 4, and serves as a drainage channel between the two. To prevent impurities in the water flow from accumulating in the horizontal tunnel section 3, a gasket is laid in the horizontal tunnel section 3 between the longitudinal drainage pipe 5 and the central drainage ditch 4. When the testing equipment needs to move in the horizontal tunnel section, the gasket can be lifted and removed.
[0044] The gasket is composed of multiple spliced sections. The front section gasket 7 is laid below the connection of the longitudinal drainage pipe, and the rear section gasket 9 is laid in the flat section at the connection with the central drainage ditch. The middle section gasket 10 is laid between the two according to the length of the flat section 3. The gaskets are raised on both sides and concave in the middle to form a groove. This groove forms a water passage along the extension direction of the flat section. The gaskets are silicone gaskets with a hardness between 15-25A, which meet the support hardness requirements while having a certain degree of plasticity.
[0045] Among them, the interior of the raised parts on both sides of the front gasket 7 is an air bladder 11. By inflating it, the tilt height of the raised parts on both sides can be changed. For longitudinal drainage pipes at different elevations, their penetration height in the flat tunnel section is also different. By adjusting the tilt height, it can adapt to different water outlet positions.
[0046] The rear gasket 9 is located in the flat tunnel section where the flat tunnel section 3 connects to the central drainage ditch. When a section of longitudinal drainage pipe or the central drainage ditch connected to the maintenance passage is blocked, a large amount of water will inevitably accumulate in the maintenance passage. The rear gasket 9 has a through-hole 12 in the middle groove near the central drainage ditch. The drainage outlet 12 is connected to the drainage pipe 13 below the gasket. The drainage pipe 13 is embedded in the inner wall of the flat tunnel section 3 and the vertical shaft section 2, or embedded in the groove set on the inner wall surface.
[0047] The water passage formed inside the gasket is an inclined passage. The inner surface of each gasket is inclined along the laying direction, and they are connected to form a smooth inclined water passage. The end of the gasket located at the longitudinal drain pipe is higher than the other end connected to the central drain ditch, so that the water flowing out of the longitudinal drain pipe can flow into the central drain ditch.
[0048] The outlet end of the drainage pipe 13 extends to the maintenance inlet of the vertical shaft section 2. When draining water, the outlet end of the drainage pipe 13 can be connected by a water-guiding device installed in the cross passage. The water-guiding device is a negative pressure water-guiding bag 14 or a water pump 15. The pipe end of the water-guiding device can be connected to the outlet section of the drainage pipe 13 through a pipe connector.
[0049] The water diversion device is located in the cross passage 1 for easy operation by construction personnel. The water outlet of the water diversion device can be connected to a water collection bucket or other transfer equipment through a pipeline, or the accumulated water can be discharged directly to the outside of the tunnel through the pipeline.
[0050] The negative pressure water-diverting bag 12 is used when there is insufficient power in the tunnel. The accumulated water is introduced into the bag by manually opening the negative pressure valve. It can be used again by replacing the bag. When there is sufficient power in the tunnel, the water pump 13 can be used to drain the water.
[0051] The maintenance passage is arranged at intervals of 250m-350m along the longitudinal direction of the tunnel. In tunnels with a cross passage 1, the cross passage can be used directly. In tunnels without a cross passage, a vertical shaft section and a horizontal tunnel section of the maintenance passage can be further set up by opening a cross passage 1 on one side of the tunnel. The opened cross passage 1 also serves as a pedestrian cross passage in the tunnel, meeting the requirements of rescue and escape functions.
[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.
Claims
1. A maintenance facility for a highway tunnel drainage system, characterized in that, The maintenance facilities include: Transverse passages are opened laterally on the sidewalls of the tunnel and are arranged at intervals along the longitudinal direction of the tunnel; The vertical shaft section is located underground in the horizontal passage. The upper opening end is the entrance to the maintenance passage, and the entrance is flush with the ground of the horizontal passage. The entrance is covered with a movable cover plate. The horizontal tunnel section connects to the lower end of the vertical shaft section and extends to the central drainage ditch, connecting the two and connecting the longitudinal drainage pipe along the extension path. The gaskets are laid in sections at the bottom of the tunnel section, with raised sides that fit against the sidewalls of the tunnel section. The center is a groove to form a water passage. The section below the connection with the longitudinal drainage pipe is the front gasket, and the section laid to the central drainage ditch is the rear gasket. The inclination angle of the raised parts on both sides of the front gasket can be adjusted. The drainage pipeline is laid inside the horizontal tunnel section and the vertical shaft section. The water inlet end is connected to the water passage of the rear gasket, and the water outlet end extends to the horizontal channel and is connected to the water diversion device in the horizontal channel.
2. The maintenance facility for a highway tunnel drainage and waterproofing system according to claim 1, characterized in that: The cross passages of the up-going tunnel and the down-going tunnel are located at the same transverse position and are connected to form an emergency passage.
3. The maintenance facility for a highway tunnel drainage and waterproofing system according to claim 1, characterized in that: The maintenance access channels are arranged at intervals along the longitudinal direction of the tunnel, with the distance between two maintenance access channels being less than 350m.
4. The maintenance facility for a highway tunnel drainage and waterproofing system according to claim 1, characterized in that: The longitudinal drainage pipe passes through the side wall of the tunnel section and communicates with the inner cavity of the tunnel section.
5. A maintenance facility for a highway tunnel drainage and waterproofing system according to claim 1, characterized in that: The gasket is a silicone gasket with a hardness between 15 and 25A. The interior of the raised part of the front gasket is an air bladder, and the air inlet of the air bladder is located on the side wall of the gasket.
6. A maintenance facility for a highway tunnel drainage and waterproofing system according to claim 2, characterized in that: The water passage formed by the segmented laying of gaskets is inclined along the extension direction of the tunnel section, and the elevation of the bottom surface of the groove of the front gasket is higher than the elevation of the bottom surface of the groove of the rear gasket.
7. A maintenance facility for a highway tunnel drainage and waterproofing system according to claim 1, characterized in that: The drainage pipeline located in the flat tunnel section is buried under the gasket, and the water inlet end of the drainage pipeline extends to the connection between the front gasket and the central drainage ditch, and is connected to the water passage at the connection.
8. A maintenance facility for a highway tunnel drainage and waterproofing system according to claim 1, characterized in that: The inner walls of the raised portions on both sides of the gasket are inclined in an inverted cone shape from the top down, and the outer walls are attached to the side walls of the flat section. The top of the raised portion of the front gasket is attached to the area below the longitudinal drainage pipe.
9. A maintenance facility for a highway tunnel drainage and waterproofing system according to claim 3, characterized in that: The water intake device is a negative pressure water intake bag or a water pump.