Blind ditch drainage system for tunnel pavement base course

Abstract

The utility model belongs to the technical field of tunnel engineering, and discloses a blind ditch drainage system for a tunnel pavement base course, which is characterized in that transverse drainage blind ditches are arranged at the top of the tunnel pavement base course along the longitudinal direction of a tunnel at certain intervals, and longitudinal drainage blind ditches are arranged along tunnel traffic lane separation lines; steel plates with shear nails are arranged at the tops of the longitudinal drainage blind ditches and the transverse drainage blind ditches to protect the drainage ditches, the steel plates do not shift in the driving process, and the longitudinal drainage blind ditches and the transverse drainage blind ditches are communicated with each other, so that a #-shaped blind ditch drainage system is formed in the tunnel pavement base course to collect leakage water and drain the leakage water to roadside ditches; and the collection of the leakage water at the deformation joint is further strengthened. The drainage problem of leaked water in the tunnel pavement base layer is solved, streaming of accumulated water is avoided, the problem of pavement cracking caused by water leakage of the pavement base layer can be effectively avoided, the service life of the pavement structure in the tunnel is prolonged, and the maintenance cost of tunnel pavement engineering in the whole life cycle is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel engineering, and in particular relates to a blind ditch drainage system for a tunnel pavement base. Background Art

[0002] In recent years, tunnel pavement damage caused by water seepage from the tunnel floor has become commonplace, with damage occurring most prominently at tunnel expansion joints. This is largely due to drainage issues. Conventional blind drainage ditches within the pavement base layer are unable to effectively drain water seeping from the tunnel floor or the pavement surface. Over time, the pavement structure, exposed to water-rich environments, gradually develops diffraction cracks, sometimes even causing waterlogging. Therefore, developing an active drainage system that can effectively collect and drain water seeping from the pavement base layer is crucial.

[0003] The leakage water in the tunnel pavement base has the characteristics of large water outflow at the deformation joints, easy accumulation in the blind areas of the lateral drainage facilities, and complex water flow direction at the cross slope changes. How to effectively solve these problems is also the focus of the research of this utility model. Utility Model Content

[0004] The utility model aims to solve the technical problem that the conventional drainage blind ditch set in the tunnel pavement base cannot effectively drain the leakage water from the tunnel bottom or the pavement surface, and provides a blind ditch drainage system for the tunnel pavement base. On the basis of quickly collecting the leakage water in the pavement base at the tunnel deformation joint, the blind ditch drainage system can efficiently discharge the leakage water in the tunnel pavement base to the roadside ditch through partitioned water collection and vertical and horizontal two-way transportation, avoiding the cross-flow of accumulated water and effectively avoiding the pavement cracking problem caused by the leakage of the pavement base, thereby extending the service life of the pavement structure in the tunnel and reducing the maintenance cost of the tunnel pavement project during the whole life cycle.

[0005] In order to solve the above technical problems, the present invention is implemented through the following technical solutions:

[0006] The utility model provides a blind ditch drainage system for tunnel pavement base, wherein a plurality of transverse drainage blind ditches and a plurality of longitudinal drainage blind ditches are arranged on the top of the pavement structure base, and a plurality of permeable columns are arranged under the transverse drainage blind ditches at the deformation joints of the tunnel floor;

[0007] The transverse drainage blind ditch extends transversely along the tunnel and is arranged corresponding to the deformation joints of the tunnel floor and is arranged at intervals between the deformation joints of the tunnel floor; the transverse drainage blind ditch comprises a transverse groove opened on the top of the pavement structure base layer, a transverse permeable blind pipe is laid in the transverse groove, and the space inside the transverse groove except the transverse permeable blind pipe is filled with clean gravel, and the clean gravel is wrapped with non-woven fabric;

[0008] The permeable columns are arranged below the transverse drainage blind ditch corresponding to the deformation joint of the tunnel floor and are evenly spaced along the transverse direction of the tunnel; the tops of the permeable columns are connected to the transverse drainage blind ditch, and the bottoms are connected to the deformation joint of the tunnel floor; the permeable columns include columnar channels, the interior of which is filled with clean gravel or random wire blind tubes, and the clean gravel or random wire blind tubes are wrapped with non-woven fabrics;

[0009] The longitudinal drainage blind ditch extends longitudinally along the tunnel and is arranged corresponding to the lane divider; the longitudinal drainage blind ditch comprises a longitudinal groove opened on the top of the pavement structure base layer, a longitudinal permeable blind pipe is laid in the longitudinal groove, and the space inside the longitudinal groove except the longitudinal permeable blind pipe is filled with clean gravel, and the clean gravel is wrapped with non-woven fabric;

[0010] The transverse drainage blind ditch and the longitudinal drainage blind ditch are connected to each other, and the transverse permeable blind pipe is connected to the roadside ditch, which is used to collect leaked water in the pavement structure base and discharge it through the roadside ditch; the transverse permeable blind pipe and the longitudinal permeable blind pipe are mutually arranged in sections, and the ends of each section of the transverse permeable blind pipe and each section of the longitudinal permeable blind pipe are connected by a four-way joint, and the ends of the transverse permeable blind pipe and the ends of the longitudinal permeable blind pipe connected by the four-way joint are both wrapped with non-woven fabric;

[0011] The tops of the transverse drainage blind ditch and the longitudinal drainage blind ditch are both provided with long thick steel plates, and the tops of the intersections of the transverse drainage blind ditch and the longitudinal drainage blind ditch are provided with cross-shaped thick steel plates; the long thick steel plates and the cross-shaped thick steel plates are located on the surface of the pavement structure base layer and do not invade the pavement structure surface layer; anti-slip shear nails are respectively provided on both sides of the long thick steel plates and the cross-shaped thick steel plates to prevent the long thick steel plates and the cross-shaped thick steel plates from shifting during use.

[0012] Furthermore, the transverse drainage blind ditch and the longitudinal drainage blind ditch are both located below the surface layer of the pavement structure.

[0013] Furthermore, the slope of the transverse drainage blind ditch is consistent with the transverse slope of the road surface in the tunnel, and the slope of the longitudinal drainage blind ditch is consistent with the longitudinal slope of the road surface in the tunnel.

[0014] Furthermore, the transverse drainage blind ditches located between the deformation joints of the tunnel floor are evenly distributed along the longitudinal direction of the tunnel between adjacent tunnel floor deformation joints.

[0015] Furthermore, the transverse water-permeable blind pipe is placed centrally inside the transverse groove, and the longitudinal water-permeable blind pipe is placed centrally inside the longitudinal groove.

[0016] Furthermore, the width of the permeable column is smaller than the width of the transverse groove of the transverse drainage blind ditch.

[0017] Furthermore, the transverse water-permeable blind pipe and the longitudinal water-permeable blind pipe are soft water-permeable pipes or corrugated pipes with holes in the upper half wall.

[0018] Furthermore, the long strip thick steel plate and the cross thick steel plate are connected by welding.

[0019] Furthermore, the anti-slip shear nails are evenly spaced on both sides of the long thick steel plate and the cross thick steel plate.

[0020] Furthermore, the gaps between the slots of the long thick steel plate and the cross thick steel plate and the anti-slip shear nails are filled and fixed with the same material as the base of the pavement structure.

[0021] The beneficial effects of the utility model are:

[0022] (1) The utility model evenly arranges permeable columns at certain intervals along the transverse direction of the tunnel below the transverse drainage blind ditch at the deformation joint, which can quickly and efficiently collect the seepage water in the road base at the tunnel deformation joint and greatly reduce the cross-flow of seepage water;

[0023] (2) The utility model arranges transverse drainage blind ditches at regular intervals along the longitudinal direction of the tunnel, and arranges longitudinal drainage blind ditches below the lane divider. The longitudinal and transverse permeable blind pipes in the blind ditch are connected by four-way pipes, thereby forming a well-shaped blind ditch drainage system. While strengthening transverse water collection and drainage, it can efficiently discharge the leaked water in the tunnel pavement base to the roadside ditch through zoned water collection and longitudinal and transverse two-way transportation.

[0024] (3) The geometric dimensions and spacing of the permeable columns, transverse drainage blind ditches, and longitudinal drainage blind ditches of the present invention can be adjusted according to actual drainage needs to ensure the economy of their application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A plan view of the blind ditch drainage system for the tunnel pavement base provided by the embodiment of the utility model;

[0026] Figure 2 A cross-sectional layout diagram of a transverse drainage blind ditch at a deformation joint in a drainage system provided by an embodiment of the present utility model;

[0027] Figure 3 A cross-sectional layout diagram of a transverse drainage blind ditch between deformation joints in a drainage system provided by an embodiment of the present utility model;

[0028] Figure 4A schematic diagram of the cross-sectional structure of a horizontal drainage blind ditch in a drainage system provided by an embodiment of the present utility model;

[0029] Figure 5 A schematic diagram of the cross-sectional structure of a longitudinal blind drainage ditch in a drainage system provided by an embodiment of the present utility model;

[0030] Figure 6 This is a partially enlarged structural diagram of a four-way joint connecting longitudinal and transverse permeable blind pipes in a drainage system provided by an embodiment of the present utility model.

[0031] Figure 7 This is a partially enlarged schematic diagram of the long strip thick steel plates and the cross-shaped thick steel plates in the drainage system provided by an embodiment of the utility model.

[0032] In the above figure: 1. Permeable column; 2. Horizontal permeable blind pipe; 3. Longitudinal permeable blind pipe; 4. Four-way pipe joint; 5. Long strip thick steel plate; 6. Cross-shaped thick steel plate; 7. Anti-slip shear nail; 8. Cleaned gravel; 9. Non-woven fabric; 10. Pavement structure surface layer; 11. Pavement structure base layer; 12. Tunnel main structure bottom plate; 13. Tunnel bottom plate deformation joint; 14. Roadside ditch. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] like Figure 1 As shown, an embodiment of the utility model provides a blind ditch drainage system for the pavement base in a tunnel. On the basis of the existing system of collecting pavement water only by relying on the transverse slope and longitudinal slope of the pavement, a number of transverse drainage blind ditches and a number of longitudinal drainage blind ditches are added on the top of the pavement structure base 11, and a number of permeable columns 1 are added under the transverse drainage blind ditch at the deformation joint 13 of the tunnel floor.

[0035] like Figure 2 and Figure 3 As shown, transverse drainage blind ditches are arranged on top of the pavement structure base layer 11 and below the pavement structure surface layer 10. The slope of the transverse drainage blind ditches matches the transverse slope of the tunnel pavement. Transverse drainage blind ditches extend transversely along the tunnel and are arranged corresponding to and between tunnel floor deformation joints 13. Transverse drainage blind ditches located between tunnel floor deformation joints 13 are evenly spaced along the tunnel longitudinal direction 13 between adjacent tunnel floor deformation joints, with spacing generally no greater than 1 / 3 of the spacing between tunnel floor deformation joints 13.

[0036] like Figure 4As shown, the transverse drainage blind ditch includes a transverse groove opened on the top of the pavement structure base 11, and a transverse permeable blind pipe 2 is laid along the length direction of the transverse groove. The transverse permeable blind pipe 2 is placed centrally inside the transverse groove; the space inside the transverse groove except the transverse permeable blind pipe 2 is filled with clean gravel 8, and the clean gravel 8 is wrapped with non-woven fabric 9 to strengthen the collection of leaked water at the deformation joint 13 of the tunnel floor.

[0037] At the lower part of each transverse drainage blind ditch corresponding to the deformation joint 13 of the tunnel floor, a number of permeable columns 1 are evenly arranged at a certain interval along the transverse direction of the tunnel. The permeable column 1 includes a columnar channel, the interior of the columnar channel is filled with clean gravel 8, and the clean gravel 8 is wrapped with non-woven fabric 9 to strengthen the collection of leaked water at the deformation joint 13 of the tunnel floor. In some embodiments, the permeable column 1 can also be filled with a random wire blind pipe instead of the clean gravel 8. The top of the permeable column 1 is connected to the transverse drainage blind ditch, and the bottom is connected to the deformation joint 13 of the tunnel floor. The width of the permeable column 1 is smaller than the transverse groove width of the transverse drainage blind ditch, generally 1 / 2-2 / 3 of the transverse groove width, to ensure effective collection of deformation joint leakage water and reduce overflow.

[0038] The longitudinal drainage blind ditch is located on top of the pavement structure base layer 11 and below the pavement structure surface layer 10. The slope of the longitudinal drainage blind ditch is consistent with the longitudinal slope of the tunnel pavement. The longitudinal drainage blind ditch extends along the longitudinal direction of the tunnel and is arranged between adjacent lanes to minimize traffic rolling.

[0039] like Figure 5 As shown, the longitudinal drainage blind ditch includes a longitudinal groove opened on the top of the pavement structure base 11, and a longitudinal permeable blind pipe 3 is laid along the length direction of the longitudinal groove. The longitudinal permeable blind pipe 3 is placed centrally inside the longitudinal groove; the space inside the longitudinal groove except the longitudinal permeable blind pipe 2 is filled with clean gravel 8, and the clean gravel 8 is wrapped with non-woven fabric 9 to strengthen the collection of leaked water at the deformation joint 13 of the tunnel floor.

[0040] The transverse water-permeable blind pipe 2 and the longitudinal water-permeable blind pipe 3 can be made of soft water-permeable pipes or corrugated pipes with holes punched on the upper half wall.

[0041] The transverse drainage blind ditch and the longitudinal drainage blind ditch are interconnected and are used to collect leakage water in the pavement structure base 11 and discharge it to the roadside ditch 14 through the transverse permeable blind pipe 2 to discharge it out of the tunnel or to the sewage pumping station.

[0042] like Figure 6As shown, the transverse blind-tubes 2 and longitudinal blind-tubes 3 are arranged in sections, each with its own node. The intersecting ends of each transverse blind-tube 2 and each longitudinal blind-tube 3 are connected via a four-way joint 3, thus forming a well-shaped blind ditch drainage system. To prevent water leakage, the ends of the transverse blind-tubes 2 and the longitudinal blind-tubes 3 connected by the four-way joint 3 are wrapped with non-woven fabric 4.

[0043] The horizontal drainage blind ditch, the vertical drainage blind ditch and the permeable column 1 constitute a well-shaped blind ditch drainage system, which has the characteristics of strengthening horizontal water collection and drainage, and has the characteristics of zoned water collection, and vertical and horizontal two-way transportation and discharge.

[0044] like Figure 7 As shown, the tops of the transverse drainage blind ditch and the longitudinal drainage blind ditch are both provided with long thick steel plates 5 for protection, and the tops of the intersections of the transverse drainage blind ditch and the longitudinal drainage blind ditch are provided with cross-shaped thick steel plates 6 for protection to prevent the transverse drainage blind ditch and the longitudinal drainage blind ditch from being crushed during driving.

[0045] The long strip thick steel plate 5 and the cross thick steel plate 6 have the same width, height and thickness. They are installed on the surface layer of the pavement structure base layer 11 and should not invade the pavement structure surface layer 10. The long strip thick steel plate 5 and the cross thick steel plate 6 are connected by welding.

[0046] Anti-slip shear nails 7 are respectively arranged on both sides of the long strip thick steel plate 5 and the cross-shaped thick steel plate 6. The anti-slip shear nails 7 are evenly distributed at a certain interval on both sides of the long strip thick steel plate 5 and the cross-shaped thick steel plate 6 to prevent the long strip thick steel plate 5 and the cross-shaped thick steel plate 6 from shifting during use.

[0047] The gaps between the slots for constructing the long strip thick steel plates 5 and the cross thick steel plates 6 and their anti-slip shear nails 7 are filled and fixed with the same material as the pavement structure base 11.

[0048] In some embodiments, the geometric dimensions and spacing of the permeable columns 1 , the transverse permeable blind pipes 2 , and the longitudinal permeable blind pipes 3 can be adjusted according to actual drainage requirements to ensure the economic efficiency of their application.

[0049] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms of specific changes without departing from the scope of protection of the invention and the claims. These all fall within the scope of protection of the present invention.

Claims

1. A blind ditch drainage system for tunnel pavement base, characterized in that: A plurality of transverse drainage blind ditches and a plurality of longitudinal drainage blind ditches are arranged on the top of the pavement structure base, and a plurality of permeable columns are arranged under the transverse drainage blind ditches at the deformation joints of the tunnel floor; The transverse drainage blind ditch extends transversely along the tunnel and is arranged corresponding to the deformation joints of the tunnel floor and is arranged at intervals between the deformation joints of the tunnel floor; the transverse drainage blind ditch comprises a transverse groove opened on the top of the pavement structure base layer, a transverse permeable blind pipe is laid in the transverse groove, and the space inside the transverse groove except the transverse permeable blind pipe is filled with clean gravel, and the clean gravel is wrapped with non-woven fabric; The permeable columns are arranged below the transverse drainage blind ditch corresponding to the deformation joint of the tunnel floor and are evenly spaced along the transverse direction of the tunnel; the tops of the permeable columns are connected to the transverse drainage blind ditch, and the bottoms are connected to the deformation joint of the tunnel floor; the permeable columns include columnar channels, the interior of which is filled with clean gravel or random wire blind tubes, and the clean gravel or random wire blind tubes are wrapped with non-woven fabrics; The longitudinal drainage blind ditch extends longitudinally along the tunnel and is arranged corresponding to the lane divider; the longitudinal drainage blind ditch comprises a longitudinal groove opened on the top of the pavement structure base layer, a longitudinal permeable blind pipe is laid in the longitudinal groove, and the space inside the longitudinal groove except the longitudinal permeable blind pipe is filled with clean gravel, and the clean gravel is wrapped with non-woven fabric; The transverse drainage blind ditch and the longitudinal drainage blind ditch are connected to each other, and the transverse permeable blind pipe is connected to the roadside ditch, which is used to collect leaked water in the pavement structure base and discharge it through the roadside ditch; the transverse permeable blind pipe and the longitudinal permeable blind pipe are mutually arranged in sections, and the ends of each section of the transverse permeable blind pipe and each section of the longitudinal permeable blind pipe are connected by a four-way joint, and the ends of the transverse permeable blind pipe and the ends of the longitudinal permeable blind pipe connected by the four-way joint are both wrapped with non-woven fabric; The tops of the transverse drainage blind ditch and the longitudinal drainage blind ditch are both provided with long thick steel plates, and the tops of the intersections of the transverse drainage blind ditch and the longitudinal drainage blind ditch are provided with cross-shaped thick steel plates; the long thick steel plates and the cross-shaped thick steel plates are located on the surface of the pavement structure base layer and do not invade the pavement structure surface layer; anti-slip shear nails are respectively provided on both sides of the long thick steel plates and the cross-shaped thick steel plates to prevent the long thick steel plates and the cross-shaped thick steel plates from shifting during use.

2. A blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The transverse drainage blind ditch and the longitudinal drainage blind ditch are both located below the surface layer of the pavement structure.

3. The blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The slope of the transverse drainage blind ditch is consistent with the transverse slope of the road surface in the tunnel, and the slope of the longitudinal drainage blind ditch is consistent with the longitudinal slope of the road surface in the tunnel.

4. The blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The transverse drainage blind ditch located in the tunnel floor deformation joint interval is evenly distributed along the tunnel longitudinal direction between adjacent tunnel floor deformation joints.

5. The blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The transverse water-permeable blind pipe is placed in the center of the transverse groove, and the longitudinal water-permeable blind pipe is placed in the center of the longitudinal groove.

6. The blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The width of the permeable column is smaller than the transverse groove width of the transverse drainage blind ditch.

7. The blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The transverse water-permeable blind pipe and the longitudinal water-permeable blind pipe are soft water-permeable pipes or corrugated pipes with holes punched on the upper half wall.

8. The blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The long strip thick steel plate and the cross thick steel plate are connected by welding.

9. The blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The anti-slip shear nails are evenly distributed at intervals on both sides of the long thick steel plate and the cross thick steel plate.

10. The blind ditch drainage system for tunnel pavement base according to claim 1, characterized in that: The gaps between the slots of the long strip thick steel plate, the cross thick steel plate and the anti-slip shear nails are filled and fixed with the same material as the base layer of the pavement structure.

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