Tunnel drainage system

Abstract

The utility model provides a tunnel drainage system which comprises a main traffic lane, an auxiliary channel, a center drainage ditch and an inspection well, the auxiliary channel is adjacent to or connected with the main traffic lane, the center drainage ditch is arranged below the main traffic lane and used for draining underground water in a tunnel, the inspection well is located on the auxiliary channel, and a maintenance channel is formed in the well bottom of the inspection well. The central drainage ditch is communicated. The inspection well is arranged, and the maintenance channel communicated with the central drainage ditch is formed in the well bottom, so that maintenance personnel and a dredging operation machine can enter the central drainage ditch from the inspection well when maintenance operation such as inspection, dredging and the like needs to be carried out on the tunnel drainage system, road surface damage or road breaking construction is not needed, the maintenance convenience is improved, and the influence on traffic is reduced. Furthermore, the inspection well is located on the auxiliary channel, the problem of traffic jam possibly caused by the fact that the inspection well is arranged on the main traffic lane is avoided, the traffic capacity of the main traffic lane is guaranteed, traffic in the tunnel can run normally, and the traffic efficiency is improved.

Description

Technical Field

[0001] This application belongs to the technical field of traffic engineering, and particularly relates to a tunnel drainage system. Background Art

[0002] With the continuous development of traffic infrastructure, tunnels play an increasingly important role in modern traffic. However, the geological environment where tunnels are located is complex, and they are often troubled by groundwater. If the groundwater in the tunnel cannot be effectively drained, it will pose a serious threat to the structural safety and driving safety of the tunnel.

[0003] Many drawbacks have emerged in the actual application of traditional tunnel drainage systems. Among them, the maintenance of the drainage system is quite difficult. Due to the lack of a convenient maintenance passage, the road surface must be damaged during inspection and silt cleaning, and construction must be carried out with the road closed. After the operation is completed, the road surface must be restored. The inspection is time-consuming and laborious, and it affects traffic. Utility Model Content

[0004] Therefore, the technical problem to be solved by this application is to provide a tunnel drainage system that does not require road surface damage or road closure during maintenance operations such as inspection and silt cleaning, greatly improving the convenience of maintenance.

[0005] To solve the above problems, this application provides a tunnel drainage system, including:

[0006] The main driving lane;

[0007] An accessory passage, which is adjacent to or connected to the main driving lane;

[0008] A central drainage ditch, which is arranged under the main driving lane and used to drain the groundwater in the tunnel;

[0009] An inspection well, which is located on the accessory passage. A maintenance passage is opened at the bottom of the inspection well for connecting the central drainage ditch.

[0010] Optionally, the vertical cross-section of the central drainage ditch is rectangular, and the side lengths of the rectangle are not less than 1 m.

[0011] Optionally, the central drainage ditch is covered with a drainage ditch cover plate, and a heat preservation plate is arranged on the side of the drainage ditch cover plate away from the main driving lane.

[0012] Optionally, the maintenance passage slopes downward in the direction from far away from the central drainage ditch to close to the central drainage ditch.

[0013] Optionally, in the tunnel, the bottom of the tunnel is provided with an inverted arch structure, a support structure and a lining structure are sequentially arranged on both sides of the tunnel, and a plurality of circumferential drain pipes are arranged between the support structure and the lining structure. The plurality of circumferential drain pipes are arranged at equal intervals along the extension direction of the central drainage ditch for guiding the groundwater to the longitudinal drainage system.

[0014] Optionally, the longitudinal drainage system includes:

[0015] A longitudinal drain pipe extending in the same direction as the central drainage ditch for collecting seepage water from the circumferential drain pipes and other parts of the tunnel;

[0016] A transverse drainage trough perpendicular to the longitudinal drain pipe, one end of the transverse drainage trough is connected to the longitudinal drain pipe, and the other end is connected to the central drainage ditch;

[0017] Wherein, a plurality of the transverse drainage troughs are arranged at equal intervals along the extension direction of the longitudinal drain pipe.

[0018] Optionally, the transverse drainage trough slopes downward in the direction from far away from the central drainage ditch to close to the central drainage ditch.

[0019] Optionally, the longitudinal drainage system further includes:

[0020] A longitudinal water collecting trough located at the intersection of the transverse drainage trough and the longitudinal drain pipe. The longitudinal water collecting trough is used for converging the groundwater in the longitudinal drain pipe and guiding the groundwater to the transverse drainage trough;

[0021] Wherein, a plurality of the longitudinal water collecting troughs are also arranged, and the plurality of longitudinal water collecting troughs are arranged in one-to-one correspondence with the plurality of transverse drainage troughs.

[0022] Optionally, the cross-sectional area of the longitudinal water collecting trough is larger than the cross-sectional area of the longitudinal drain pipe.

[0023] Optionally, cable trenches are respectively arranged on both sides of the main driving lane, and drain pipes penetrating through the bottom surface of the cable trench are arranged below the cable trenches. One end of the drain pipe far away from the cable trench is connected to the transverse drainage trough.

[0024] Beneficial effects

[0025] In the embodiment of the present utility model, the provided tunnel drainage system is provided with inspection wells and a maintenance passage communicating with the central drainage ditch is opened at the bottom of the well. Thus, when maintenance operations such as inspection and dredging of the tunnel drainage system are required, maintenance personnel and dredging operation machines can enter the central drainage ditch from the inspection well without damaging the road surface, improving the convenience of maintenance; at the same time, there is no need for road closure construction, reducing the impact on traffic, avoiding the inconvenience brought to passing vehicles and pedestrians by road closure construction, and reducing the pressure of traffic management. Further, the inspection well is located on the auxiliary passage, avoiding the traffic congestion problems that may be caused by setting the inspection well on the main traffic lane, ensuring the traffic capacity of the main traffic lane, enabling the traffic in the tunnel to operate normally, and improving traffic efficiency; at the same time, it is convenient for maintenance personnel to directly enter the inspection well from the auxiliary passage, and the traffic interference during inspection and maintenance operations is small. There is no need to carry out dangerous operations on the main traffic lane, reducing the risk of maintenance operations, and maintenance personnel can carry out work more safely and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic structural diagram of an auxiliary passage of an optional embodiment of the present application;

[0027] Figure 2 FIG. is a schematic structural diagram of a tunnel of an optional embodiment of the present application.

[0028] The reference numerals are shown as:

[0029] 1, main traffic lane; 2, auxiliary passage; 3, central drainage ditch; 4, inspection well; 5, maintenance passage; 6, drainage ditch cover plate; 7, insulation board; 8, inverted arch structure; 9, support structure; 10, lining structure; 11, circumferential drain pipe; 12, longitudinal drain pipe; 13, transverse drainage trough; 14, longitudinal water collection trough; 15, cable trench; 16, drain pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0031] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0032] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model and are not used to limit the present utility model.

[0034] See Figure 1 and Figure 2 As shown, according to an embodiment of the present application, a tunnel drainage system is provided, including: a main traffic lane 1; an auxiliary passage 2, the auxiliary passage 2 being adjacent to or connected to the main traffic lane 1; a central drainage ditch 3, the central drainage ditch 3 being arranged below the main traffic lane 1 for draining the groundwater in the tunnel; an inspection well 4, the inspection well 4 being located on the auxiliary passage 2, and a maintenance passage 5 being opened at the bottom of the inspection well 4 for communicating with the central drainage ditch 3.

[0035] By providing the inspection well 4 and opening the maintenance passage 5 communicating with the central drainage ditch 3 at the bottom, when maintenance operations such as inspection and dredging of the tunnel drainage system are required, maintenance personnel and dredging operation machines can enter the central drainage ditch 3 from the inspection well 4 without damaging the road surface, improving the convenience of maintenance; at the same time, there is no need for road closure construction, reducing the impact on traffic, avoiding the inconvenience brought to passing vehicles and pedestrians by road closure construction, and reducing the pressure of traffic management. Further, the inspection well 4 is located on the auxiliary passage 2, avoiding the traffic congestion problem that may be caused by setting the inspection well 4 on the main traffic lane 1, ensuring the traffic capacity of the main traffic lane 1, enabling the traffic in the tunnel to operate normally, and improving the traffic efficiency; at the same time, it is convenient for maintenance personnel to directly enter the inspection well 4 from the auxiliary passage 2, with less traffic interference during inspection and maintenance operations, without the need for dangerous operations on the main traffic lane 1, reducing the risk of maintenance operations, and enabling maintenance personnel to carry out work more safely and efficiently.

[0036] Among them, the main traffic lane 1 extends in the same direction as the tunnel and is the main passage for vehicles to travel in the tunnel.

[0037] Specifically, the main traffic lane 1 is composed of a pavement asphalt layer and a concrete sublayer. The pavement asphalt layer is at the topmost layer of the main traffic lane 1, which can absorb and reduce the noise generated during vehicle driving and reduce the noise pollution in the tunnel. The concrete sublayer is below the pavement asphalt layer and serves as a solid foundation for the main traffic lane 1, with extremely high load-bearing capacity and can withstand the huge pressure from vehicles and various dynamic loads.

[0038] Among them, the auxiliary passage 2 is adjacent to or connected to the main traffic lane 1 and is an emergency passage for personnel evacuation and rescue in case of emergencies on the main traffic lane 1.

[0039] Specifically, the auxiliary passage 2 can be a pedestrian cross-passage, a vehicle cross-passage, an emergency parking belt, etc., and the present application does not limit this. It can be understood that when the auxiliary passage 2 is a pedestrian cross-passage or a vehicle cross-passage, the auxiliary passage 2 is connected to the main traffic lane 1; when the auxiliary passage 2 is an emergency parking belt, the auxiliary passage 2 is adjacent to the main traffic lane 1.

[0040] Among them, a central drainage ditch 3 is provided below the center of the main traffic lane 1. The central drainage ditch 3 extends in the same direction as the main traffic lane 1 and is used to collect and drain the groundwater in the tunnel. The groundwater flows into the central drainage ditch 3 through various channels (such as rock fissure infiltration, tunnel lining leakage, etc.), and then is guided to the outside of the tunnel to prevent the groundwater from accumulating in the tunnel and causing damage to the tunnel structure.

[0041] Among them, an inspection well 4 is provided on the auxiliary passage 2. A maintenance passage 5 is opened at the bottom of the inspection well 4. One end of the maintenance passage 5 intersects with the inspection well 4, and the other end intersects with the central drainage ditch 3, which is used to connect the inspection well 4 and the central drainage ditch 3, so that maintenance personnel can conveniently enter the central drainage ditch 3 for cleaning, maintenance and other work without affecting the traffic on the main traffic lane 1.

[0042] Specifically, to reduce the excavation construction volume, the passage of the inspection well 4 is a straight passage, and the side wall and the center line of the passage are both perpendicular to the center line of the auxiliary passage 2.

[0043] Among them, a wellhead cover plate is detachably provided at the wellhead of the inspection well 4.

[0044] Specifically, for the convenience of operation, one end curbstone of the wellhead cover plate is a movable curbstone, and the movable curbstone and the wellhead cover plate can be moved away during operation.

[0045] Among them, for the convenience of subsequent operation, an identification mark is provided on the movable curbstone. For example, it can be a yellow and black striped paint layer brushed on the exposed surface of the movable curbstone to facilitate the identification of the position of the inspection well 4.

[0046] Among them, a ladder can be installed on the well wall of inspection well 4 to facilitate the maintenance personnel to move up and down.

[0047] Specifically, the ladder can be several reinforced steel bar segments anchored at intervals.

[0048] It should be noted that in this embodiment, when maintenance operations such as inspection and dredging of the tunnel drainage system are required, the maintenance personnel open the manhole cover of inspection well 4, then move to the bottom of inspection well 4 with the help of the ladder, and finally enter the central drainage ditch 3 through the maintenance passage 5. For small blockages, tools can be used for manual cleaning to remove the blockages from the drainage ditch. For relatively serious siltation or large-volume blockages, a high-pressure water gun can be used for flushing. After the blockages are washed away, they can be cleaned up. Or equipment such as a dredging pump can be used to pump out the silt from the drainage ditch.

[0049] In some possible embodiments provided by the present application, as shown in Figure 2 As shown, the vertical cross-section of the central drainage ditch 3 is rectangular, and the side lengths of the rectangle are not less than 1 m. Thus, sufficient space is provided for the flow of groundwater. Even in extreme weather conditions such as heavy rain, a large amount of groundwater in the tunnel can be effectively drained, reducing the risk of water accumulation in the tunnel. Further, the vertical cross-section of the central drainage ditch 3 is rectangular and the side lengths are not less than 1 m, enabling the maintenance personnel to enter the inside of the drainage ditch more easily for operations such as cleaning silt and inspecting the structure of the drainage ditch, improving the convenience of cleaning and maintenance work.

[0050] Among them, from the perspective of the cross-section of the tunnel, the central drainage ditch 3 is rectangular. It can be understood that during the construction of the tunnel, the rectangular central drainage ditch 3 can be more easily connected and integrated with other tunnel structures. For example, it can be more closely combined with the foundation structure under the main traffic lane 1 to ensure the accurate position and stability of the drainage ditch. At the same time, the space at the bottom of the tunnel can be more effectively utilized to achieve a larger drainage capacity in a limited space.

[0051] Among them, the side lengths not less than 1 m ensure that the central drainage ditch 3 has a larger cross-sectional area for water flow, can accommodate more groundwater flow, and effectively drain the accumulated water in the tunnel. At the same time, it provides sufficient operating space for the maintenance personnel. When it is necessary to clean, inspect or repair the central drainage ditch 3, the maintenance personnel can more easily enter the inside of the drainage ditch for operations.

[0052] In some possible embodiments provided by the present application, as shown in Figure 2 As shown, the central drainage ditch 3 is covered with a drainage ditch cover 6, and a heat preservation board 7 is arranged on the side of the drainage ditch cover 6 away from the main traffic lane 1.

[0053] By setting the drain cover plate 6, the central drain 3 can be protected from external mechanical damage, extending the service life of the drain. By setting the thermal insulation board 7, the heat loss in the central drain 3 can be effectively reduced. In cold regions or winter, the temperature of the groundwater is relatively high, while the temperature in the tunnel is relatively low. Without thermal insulation measures, the water in the drain may freeze due to the too low temperature, affecting the drainage effect. The setting of the thermal insulation board 7 can prevent this situation from occurring, ensuring the normal operation of the tunnel drainage system in a low-temperature environment.

[0054] Among them, the drain cover plate 6 can specifically be a reinforced concrete cover plate with a thickness of 20 cm.

[0055] Specifically, there are reinforced concrete abutments on both sides of the central drain 3, and the drain cover plate 6 is exactly located on the reinforced concrete abutments, playing an important role in protecting the central drain 3. Above the drain cover plate 6 is the concrete base layer of the main traffic lane 1. As a solid foundation part of the main traffic lane 1, the concrete base layer directly covers the drain cover plate 6. It bears the huge pressure and various dynamic loads from the road surface asphalt layer and vehicles, and together with the drain cover plate 6 located below it, constitutes a part of the tunnel structure. This up-and-down layout not only ensures the stability and load-bearing capacity of the main traffic lane 1 but also provides effective protection for the central drain 3.

[0056] Among them, the thermal insulation board 7 can specifically be a polyurethane thermal insulation board 7 with a thickness of 5 cm.

[0057] Specifically, the thermal insulation board 7 is located below the drain cover plate 6 and is closely attached to the lower surface of the drain cover plate 6, thereby preventing the heat in the central drain 3 from dissipating to the outside. In cold climate conditions, the thermal insulation board 7 can ensure that the water temperature in the drain is relatively stable, preventing the freezing phenomenon caused by too low temperature.

[0058] In some possible implementation embodiments provided by the present application, as shown in Figure 1 As shown, the maintenance passage 5 slopes downward in the direction from far away from the central drain 3 to close to the central drain 3. Thus, a small amount of accumulated water entering the maintenance passage 5 can flow naturally to the central drain 3, avoiding the accumulated water in the maintenance passage 5 from affecting the maintenance operation. It can be understood that in the tunnel environment, there will inevitably be some water vapor or a small amount of water entering the maintenance passage 5 due to accidents. The downward-sloping maintenance passage 5 can ensure that this water drains away quickly, keeping the maintenance passage 5 relatively dry, creating a good working environment for maintenance personnel, and at the same time reducing the equipment damage and safety hazards that may be caused by the accumulated water.

[0059] Furthermore, for maintenance personnel, the downwardly inclined maintenance passage 5 makes it easier to access the central drainage ditch 3. When maintenance personnel go from the inspection well 4 to the central drainage ditch 3 for inspection, dredging and other operations, they do not need to climb or descend with excessive effort. They can reach the working location more easily along the inclined maintenance passage 5, reducing the labor intensity and improving work efficiency. At the same time, for equipment such as dredging machines, the inclined maintenance passage 5 facilitates their entry into the central drainage ditch 3. Some small dredging equipment can enter the drainage ditch more smoothly by relying on the inclined slope of the maintenance passage 5, reducing the difficulty of equipment handling and installation and making the dredging operation more convenient and efficient.

[0060] Among them, the slope of the maintenance passage 5 can be 2%.

[0061] In some possible embodiments provided by the present application, as shown in Figure 2 In the tunnel, the bottom of the tunnel is provided with an inverted arch structure 8, and a support structure 9 and a lining structure 10 are successively arranged on both sides of the tunnel. A number of circumferential drain pipes 11 are arranged between the support structure 9 and the lining structure 10, and the number of circumferential drain pipes 11 are arranged at equal intervals along the extension direction of the central drainage ditch 3 for guiding groundwater to the longitudinal drainage system.

[0062] Among them, the inverted arch structure 8 and the arch ring at the top of the tunnel together form a closed ring structure, which can better bear the soil pressure and other loads above the tunnel and prevent uneven settlement and deformation at the bottom of the tunnel.

[0063] Among them, the support structure 9 is located on the outermost side of the tunnel and is used to temporarily support the surrounding rock and soil mass during the tunnel excavation process to prevent the rock and soil mass from collapsing.

[0064] Among them, the lining structure 10 is located inside the support structure 9 and is a permanent structure of the tunnel, which is used to bear various loads inside the tunnel, such as vehicle loads, groundwater pressure, etc., and protect the facilities and personnel safety inside the tunnel.

[0065] Among them, the circumferential drain pipe 11 is located between the support structure 9 and the lining structure 10. It should be noted that due to a certain gap between the support structure 9 and the lining structure 10 of the tunnel, groundwater is likely to accumulate here. By setting the circumferential drain pipe 11, these groundwater can be timely guided to the longitudinal drainage system to avoid the erosion and damage of the tunnel structure by groundwater.

[0066] Furthermore, several circumferential drain pipes 11 are provided, and the several circumferential drain pipes 11 are arranged at equal intervals along the extension direction of the central drainage ditch 3, ensuring that groundwater can be evenly collected and guided. This layout method can cover the entire peripheral area of the tunnel. No matter from which position the groundwater seeps in, it can be quickly captured by the circumferential drain pipes 11, greatly improving the efficiency of the drainage system.

[0067] Specifically, the interval distance between two adjacent circumferential drain pipes 11 can be 3m to 5m. The groundwater on both sides of the tunnel can enter the circumferential drain pipes 11 through natural infiltration, capillary action, water pressure drive and other means.

[0068] Among them, a longitudinal drainage system is arranged below the circumferential drain pipes 11. The circumferential drain pipes 11 can guide groundwater into the longitudinal drainage system and enter the central drainage ditch 3 through the longitudinal drainage system.

[0069] In some possible embodiments provided by the present application, as shown in Figure 2 shown, the longitudinal drainage system includes: a longitudinal drain pipe 12, the longitudinal drain pipe 12 extends in the same direction as the central drainage ditch 3 and is used to collect the seepage water from the circumferential drain pipes 11 and other parts of the tunnel; a transverse drainage groove 13, the transverse drainage groove 13 is arranged perpendicular to the longitudinal drain pipe 12, one end of the transverse drainage groove 13 is communicated with the longitudinal drain pipe 12, and the other end is communicated with the central drainage ditch 3; among them, several transverse drainage grooves 13 are arranged at equal intervals along the extension direction of the longitudinal drain pipe 12. Thus, the seepage water from the circumferential drain pipes 11 and other parts of the tunnel can be collected, ensuring that the groundwater at each position in the tunnel can be effectively discharged.

[0070] Furthermore, the circumferential drain pipes 11 cooperate with the central drainage ditch 3 and the longitudinal drainage system to form a complete drainage network. Groundwater enters the longitudinal drainage system through the circumferential drain pipes 11 and finally flows into the central drainage ditch 3 and is discharged outside the tunnel, effectively reducing the risk of water accumulation in the tunnel and ensuring the dryness and safety of the tunnel.

[0071] Among them, the longitudinal drain pipe 12 is consistent with the tunnel alignment and is located below the circumferential drain pipes 11 and is used to collect the seepage water from the circumferential drain pipes 11 and other parts of the tunnel. The circumferential drain pipes 11 guide the groundwater around the tunnel to the longitudinal drain pipe 12. At the same time, other possible seepage sources in the tunnel, such as the leakage of the tunnel wall and the seepage at the construction joint, will also flow into the longitudinal drain pipe 12.

[0072] Specifically, a number of water seepage openings are distributed on the top surface of the longitudinal drain pipe 12, which are used to pass groundwater, so as to effectively collect and discharge the groundwater in the tunnel. During the actual use of the tunnel, after the groundwater seeps into the surrounding rock and soil mass of the tunnel through various channels, it will flow downward under the action of gravity and water pressure. At this time, the water seepage openings on the top surface of the longitudinal drain pipe 12 become important entrances for groundwater. The groundwater can quickly enter the interior of the longitudinal drain pipe 12 through these water seepage openings, then flow along the longitudinal drain pipe 12 to the transverse drainage trough 13, and finally be guided to the central drainage ditch 3 and discharged outside the tunnel.

[0073] Among them, the transverse drainage trough 13 is located between the longitudinal drain pipe 12 and the central drainage ditch 3, and one end of the transverse drainage trough 13 is connected to the longitudinal drain pipe 12, and the other end is connected to the central drainage ditch 3. During the actual use of the tunnel, the groundwater enters the longitudinal drain pipe 12 through the circumferential drain pipe 11, then flows into the central drainage ditch 3 through the transverse drainage trough 13, and finally is discharged outside the tunnel through the central drainage ditch 3.

[0074] Specifically, in the extending direction of the longitudinal drain pipe 12, a number of transverse drainage troughs 13 are arranged at equal intervals, ensuring that groundwater can flow into the central drainage ditch 3 evenly from different positions. Each transverse drainage trough 13 is like an efficient transfer channel, quickly guiding the groundwater in the longitudinal drain pipe 12 to the central drainage ditch 3, greatly improving the overall efficiency of the tunnel drainage system.

[0075] Among them, the interval distance between two adjacent transverse drainage troughs 13 can be 5m to 15m.

[0076] In some possible implementation embodiments provided by the present application, as shown in Figure 2 As shown, the transverse drainage trough 13 is inclined downward in the direction from far away from the central drainage ditch 3 to close to the central drainage ditch 3. Thus, the groundwater can flow more quickly to the central drainage ditch 3 under the action of gravity, forming a continuous and efficient drainage network and improving the drainage speed. At the same time, it makes it not easy for sundries to accumulate in the transverse drainage trough 13. The rapid flow of water can directly carry some smaller sundries into the central drainage ditch 3, reducing the risk of blockage of the transverse drainage trough 13.

[0077] Among them, the slope of the transverse drainage trough 13 can be 8%.

[0078] In some possible implementation embodiments provided by the present application, as shown in Figure 2As shown in the figure, the longitudinal drainage system further includes: a longitudinal catch basin 14, which is located at the intersection of the transverse drainage groove 13 and the longitudinal drainage pipe 12. The longitudinal catch basin 14 is used to converge the groundwater in the longitudinal drainage pipe 12 and guide the groundwater to the transverse drainage groove 13. Among them, several longitudinal catch basins 14 are also provided, and the several longitudinal catch basins 14 are arranged in one-to-one correspondence with the several transverse drainage grooves 13.

[0079] By providing the longitudinal catch basin 14, the groundwater in the longitudinal drainage pipe 12 can be converged. Since the longitudinal drainage pipe 12 may receive seepage water from multiple directions, setting the longitudinal catch basin 14 can concentrate these scattered water flows, avoid the scattered flow of water in the longitudinal drainage pipe 12, and thus improve the drainage efficiency.

[0080] Furthermore, the longitudinal catch basin 14 can guide the groundwater to the transverse drainage groove 13, ensuring a clear flow direction of the groundwater. This can avoid the chaotic flow or backflow of groundwater at the intersection, making the tunnel drainage system more stable and reliable.

[0081] Among them, the longitudinal catch basin 14 can be a rectangular groove, etc., and the present application does not limit this.

[0082] Specifically, the longitudinal catch basin 14 is located at the intersection of the transverse drainage groove 13 and the longitudinal drainage pipe 12. When the groundwater flows in the longitudinal drainage pipe 12 and reaches the intersection with the transverse drainage groove 13, the longitudinal catch basin 14 concentrates these scattered water flows and guides the converged groundwater to the transverse drainage groove 13. The transverse drainage groove 13 then conveys the groundwater to the central drainage ditch 3 and finally discharges it outside the tunnel. In this way, the longitudinal catch basin 14 ensures a clear flow direction of the groundwater in the drainage system and improves the drainage efficiency.

[0083] Among them, each transverse drainage groove 13 has a corresponding longitudinal catch basin 14, which can ensure that the groundwater flows smoothly from the longitudinal drainage pipe 12 into the transverse drainage groove 13, avoiding the chaos and blockage of water flow. At the same time, it is also convenient for the management and maintenance of the tunnel drainage system, because the corresponding longitudinal catch basin 14 can be quickly found according to the position of the transverse drainage groove 13.

[0084] In some possible implementation embodiments provided by the present application, refer to Figure 2As shown in the figure, the cross-sectional area of the longitudinal water collecting trough 14 is larger than that of the longitudinal drain pipe 12. Thus, more groundwater can be accommodated. When the water in the longitudinal drain pipe 12 flows into the longitudinal water collecting trough 14, due to the larger cross-sectional area of the water collecting trough, more water can be temporarily stored, avoiding blockage or poor drainage caused by the water flowing into the transverse drainage trough 13 too quickly. At the same time, in the case of a large groundwater flow rate, the longitudinal water collecting trough 14 can play a buffering role. It can withstand the relatively large water flow pressure from the longitudinal drain pipe 12, relieve the water flow to a certain extent within the longitudinal water collecting trough 14, and then flow smoothly into the transverse drainage trough 13, improving the drainage capacity of the entire drainage system.

[0085] Specifically, in the direction of the tunnel, the vertical cross-sectional area of the longitudinal water collecting trough 14 is larger than the cross-sectional area of the longitudinal drain pipe 12.

[0086] In some possible embodiments provided by the present application, refer to Figure 2 As shown in the figure, cable trenches 15 are respectively arranged on both sides of the main traffic lane 1. A drain pipe 16 penetrating the bottom surface of the cable trench 15 is arranged below the cable trench 15, and one end of the drain pipe 16 far away from the cable trench 15 is communicated with the transverse drainage trough 13.

[0087] By arranging the drain pipe 16, the accumulated water in the cable trench 15 can be discharged in time, avoiding damage to the cables caused by the accumulated water. It can be understood that in extreme weather conditions such as heavy rain, the accumulated water in the tunnel may increase. Without effective drainage measures, the cable trench 15 is easily flooded. The arrangement of the drain pipe 16 can communicate the cable trench 15 with the transverse drainage trough 13, enabling the accumulated water in the cable trench 15 to quickly flow into the transverse drainage trough 13, and then be discharged out of the tunnel through the longitudinal drainage system and the central drainage ditch 3, reducing the risk of the cable trench 15 being flooded.

[0088] Specifically, the drain pipe 16 extends in the vertical direction to communicate the cable trench 15 with the transverse drainage trough 13, thus forming a relatively independent drainage subsystem. When maintaining and managing the tunnel drainage system, the drainage situation of the cable trench 15 can be inspected and processed separately. For example, if it is found that there is accumulated water in the cable trench 15, by checking whether the drain pipe 16 is blocked and whether the connection with the transverse drainage trough 13 is unobstructed and other issues, the fault point can be quickly determined and repaired, improving the maintenance efficiency.

[0089] Those skilled in the art can easily understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0090] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present application, several improvements and variations can still be made, and these improvements and variations should also be regarded as within the protection scope of the present application.

Claims

1. A tunnel drainage system, characterized in that, Including: Main traffic lane (1); Auxiliary passage (2), the auxiliary passage (2) is adjacent to or connected with the main traffic lane (1); Central drainage ditch (3), the central drainage ditch (3) is arranged under the main traffic lane (1) and is used for draining the groundwater in the tunnel; Inspection well (4), the inspection well (4) is located on the auxiliary passage (2), and a maintenance passage (5) is opened at the bottom of the inspection well (4) for communicating with the central drainage ditch (3); The central drainage ditch (3) is covered with a drainage ditch cover plate (6), and a heat preservation plate (7) is arranged on the side of the drainage ditch cover plate (6) away from the main traffic lane (1).

2. The tunnel drainage system according to claim 1, wherein, The vertical section of the central drainage ditch (3) is rectangular, and the side lengths of the rectangle are not less than 1m.

3. The tunnel drainage system according to claim 1, characterized in that, The maintenance passage (5) slopes downward in the direction from far away from the central drainage ditch (3) to close to the central drainage ditch (3).

4. The tunnel drainage system according to claim 1, characterized in that, In the tunnel, the bottom of the tunnel is set as an inverted arch structure (8), a support structure (9) and a lining structure (10) are sequentially arranged on both sides of the tunnel, and a plurality of circumferential drain pipes (11) are arranged between the support structure (9) and the lining structure (10). The plurality of circumferential drain pipes (11) are arranged at equal intervals along the extension direction of the central drainage ditch (3) and are used for guiding the groundwater to the longitudinal drainage system.

5. The tunnel drainage system according to claim 4, characterized in that, The longitudinal drainage system includes: Longitudinal drain pipe (12), the longitudinal drain pipe (12) extends in the same direction as the central drainage ditch (3) and is used for collecting the seepage water from the circumferential drain pipes (11) and other parts of the tunnel; Transverse drainage trough (13), the transverse drainage trough (13) is arranged perpendicular to the longitudinal drain pipe (12), one end of the transverse drainage trough (13) is communicated with the longitudinal drain pipe (12), and the other end is communicated with the central drainage ditch (3); Wherein, a plurality of the transverse drainage troughs (13) are arranged, and the plurality of transverse drainage troughs (13) are arranged at equal intervals along the extension direction of the longitudinal drain pipe (12).

6. The tunnel drainage system according to claim 5, characterized in that, The transverse drainage trough (13) slopes downward in the direction from far away from the central drainage ditch (3) to close to the central drainage ditch (3).

7. The tunnel drainage system according to claim 5, wherein, The longitudinal drainage system further includes: Longitudinal water collecting trough (14), the longitudinal water collecting trough (14) is located at the intersection of the transverse drainage trough (13) and the longitudinal drain pipe (12), and the longitudinal water collecting trough (14) is used for converging the groundwater in the longitudinal drain pipe (12) and guiding the groundwater to the transverse drainage trough (13); Wherein, a plurality of the longitudinal water collecting troughs (14) are also arranged, and the plurality of longitudinal water collecting troughs (14) are arranged in one-to-one correspondence with the plurality of transverse drainage troughs (13).

8. The tunnel drainage system according to claim 7, characterized in that, The cross-sectional area of the longitudinal water collecting trough (14) is larger than the cross-sectional area of the longitudinal drain pipe (12).

9. The tunnel drainage system according to claim 5, characterized in that, On both sides of the main carriageway (1), cable trenches (15) are respectively arranged. A drain pipe (16) penetrating the bottom surface of the cable trench (15) is arranged below the cable trench (15). One end of the drain pipe (16) far away from the cable trench (15) is communicated with the transverse drainage trough (13).

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