Drainage type pavement water seepage treatment structure for operation tunnel
By setting up drainage pavement seepage treatment structures in the tunnel, including permeable cover plates and drainage blind ditches, the problem of poor seepage treatment treatment effect in the existing technology of obvious leakage areas or excessive water inflows is solved, and effective Sewage removal and preventing new seepage phenomena have reduced operating and maintenance costs and improved driving quality and service life.
Patent Information
- Application Number
- CN202420237976.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-31
AI Technical Summary
The prior art is not effective in treating water seepage in areas with obvious leakage or tunnel road surfaces with excessive water influx, and new water seepage is prone to occur.
A drainage-type pavement seepage treatment structure is adopted, including a permeable cover plate, a first drainage blind ditch and a second drainage blind ditch connecting it with the tunnel side ditch. The permeable cover is laid on the top of the first drainage blind ditch. The first drainage blind ditch contains a permeable pipe, an isolation filter layer and a water filling layer. The second drainage blind ditch is also equipped with a permeable pipe, an isolation filter layer and a filling layer to ensure that Drainage slope ≥ 2%.
Through clear drainage paths, the seepage of the tunnel pavement structure is effectively eliminated, the water pressure is reduced, and new seepage phenomenon is prevented. It is especially suitable for areas with obvious leakage or areas with excessive water influx, reducing project operation and maintenance costs, and improving driving quality. Extend service life.
Smart Images
Figure CN222477143U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tunnels, in particular to a drainage type road surface seepage treatment structure for operating tunnels. Background Art
[0002] The treatment of structural defects and diseases in operating tunnels has become an important task that cannot be avoided during the operation stage of tunnels. Tunnel pavement seepage is a disease that cannot be ignored among tunnel diseases. The main causes of tunnel pavement seepage are loose filling and emptying between the pavement structure and the tunnel invert, resulting in a large amount of water accumulation; or due to construction reasons, the originally designed drainage system is damaged or cannot play its role, and the drainage capacity of the horizontal drainage blind ditch between the road base and the drainage ditch is too low to effectively drain the accumulated water in the base; or the excavation of the tunnel causes the groundwater to be concentrated and discharged in the direction of the tunnel, forming a loose surrounding rock area within a certain range around the tunnel. Within this range, due to the adjustment of the original ground stress of the stratum, the surrounding rock is deformed and cracks open, causing groundwater to flow into the tunnel along the opened cracks.
[0003] In the prior art, the main method for treating tunnel pavement seepage is grouting, that is, slotting in the seepage range, burying grouting pipes to close the slots, injecting chemical slurry, and manually sealing the seepage points. This method is likely to cause new seepage outside the existing seepage pavement range due to the inability to dissipate groundwater pressure after the existing seepage pavement is completely blocked, especially for areas with obvious leakage or areas with excessive water inflow, making this treatment method difficult or even impossible to apply.
[0004] In view of this, it is necessary to propose a drainage type pavement seepage treatment structure for operating tunnels to solve or at least alleviate the above-mentioned defects. Utility Model Content
[0005] The main purpose of the utility model is to provide a drainage type pavement seepage treatment structure for operating tunnels, so as to solve the technical problems in the prior art that the tunnel pavement seepage treatment effect is poor in areas with obvious leakage or areas with excessive water inflow, and new seepage phenomena are prone to occur.
[0006] To achieve the above-mentioned purpose, the utility model provides a drainage type pavement seepage treatment structure for operating tunnels, comprising a permeable cover plate, a first drainage blind ditch for being arranged in a pavement seepage area, and a second drainage blind ditch connecting the first drainage blind ditch and the tunnel side ditch, wherein the permeable cover plate is laid on the top of the first drainage blind ditch;
[0007] The first drainage blind ditch includes a first permeable pipe, a first isolation filter layer wrapped around the first permeable pipe, and a first water-passing filling layer filled between the first permeable pipe and the first isolation filter layer; the second drainage blind ditch includes a second permeable pipe, a second isolation filter layer wrapped around the second permeable pipe, and a second water-passing filling layer filled between the second permeable pipe and the second isolation filter layer; wherein, the first permeable pipe has a first drainage slope toward the second permeable pipe, and the second permeable pipe has a second drainage slope toward the tunnel side ditch.
[0008] Preferably, the first drainage blind ditch includes a plurality of first sub-drainage blind ditches arranged at intervals along a first direction in the road surface seepage area and a plurality of second sub-drainage blind ditches arranged at intervals along a second direction in the road surface seepage area, the first sub-drainage blind ditch is connected to the second sub-drainage blind ditch, and the first direction is perpendicular to the second direction.
[0009] Preferably, the spacing distance between two adjacent first sub-drainage blind gutters and the spacing distance between two adjacent second sub-drainage blind gutters are both set between 70-90 cm.
[0010] Preferably, the first isolation and filtration layer and the second isolation and filtration layer are both geotextiles.
[0011] Preferably, the first water-passing filling layer is a filling layer formed by crushed stones with a particle size of 5-20 mm filled between the first permeable pipe and the first isolation filter layer, and the second water-passing filling layer is a filling layer formed by crushed stones with a particle size of 5-20 mm filled between the second permeable pipe and the second isolation filter layer.
[0012] Preferably, the first drainage slope and the second drainage slope are both ≥ 2%.
[0013] Preferably, the thickness of the geotextile is greater than 1.0 mm, and the weight of the geotextile is greater than 200 g / m2.
[0014] Preferably, both the first water-permeable pipe and the second water-permeable pipe are soft water-permeable pipes, and the thickness of the soft water-permeable pipe is greater than 2.5 mm.
[0015] Preferably, the water-permeable cover plate is a ductile iron water-permeable cover plate.
[0016] Preferably, the diameters of the first water-permeable pipe and the second water-permeable pipe are both 80 mm.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] The utility model provides a drainage type road surface water seepage treatment structure for operating tunnels, comprising a permeable cover plate, a first drainage blind ditch for setting in a road surface water seepage area, and a second drainage blind ditch connecting the first drainage blind ditch and the tunnel ditch, the permeable cover plate is laid on the top of the first drainage blind ditch, the first drainage blind ditch comprises a first permeable pipe, a first isolation filter layer wrapped around the first permeable pipe, and a first water-passing filling layer filled between the first permeable pipe and the first isolation filter layer, and the second drainage blind ditch comprises a second permeable pipe, a second water-isolating filter layer wrapped around the second permeable pipe, and a second filling layer filled between the second permeable pipe and the second isolation filter layer. The present application sets a drainage type blind ditch, and the drainage path is clear, which can effectively exclude water seepage of the tunnel pavement structure, reduce water pressure, and effectively prevent the occurrence of new water seepage, especially can solve the road surface water seepage treatment in obvious water leakage areas or areas with excessive water inflow; the structure is low in cost, high in construction efficiency, easy to control in quality, simple and durable, can reduce the cost of project operation and maintenance, improve driving quality, extend the service life of the project, reduce the cost of the life cycle, and has significant social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0020] Figure 1 This is an application scenario diagram of the overall structure in one embodiment of the utility model;
[0021] Figure 2 It is a schematic elevation view of a first blind drainage ditch in one embodiment of the utility model;
[0022] Figure 3 It is a schematic structural diagram of a water-permeable cover plate in one embodiment of the utility model.
[0023] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.
[0024] Description of Figure Numbers:
[0025] 10. Permeable cover plate; 110. Water hole; 20. First drainage blind ditch; 210. First permeable pipe; 220. First isolation filter layer; 230. First water-passing filling layer; 240. First sub-drainage blind ditch; 250. Second sub-drainage blind ditch; 30. Second drainage blind ditch; 40. Tunnel lining; 50. Invert concrete; 60. Tunnel side ditch; 70. Pavement seepage area; 80. Asphalt concrete pavement layer. DETAILED DESCRIPTION
[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as described in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0030] Please refer to the attached Figures 1 to 3 In one embodiment of the utility model, a drainage type pavement seepage treatment structure for an operating tunnel comprises a permeable cover plate 10, a first drainage blind ditch 20 for being arranged in a pavement seepage area 70, and a second drainage blind ditch 30 connecting the first drainage blind ditch 20 and the tunnel side ditch 60, wherein the permeable cover plate 10 is laid on the top of the first drainage blind ditch 20; wherein,
[0031] The first drainage blind ditch 20 includes a first permeable pipe 210, a first isolation filter layer 220 wrapped around the first permeable pipe 210, and a first water-passing filling layer 230 filled between the first permeable pipe 210 and the first isolation filter layer 220; the second drainage blind ditch 30 includes a second permeable pipe (not shown in the figure), a second isolation filter layer (not shown in the figure) wrapped around the second permeable pipe, and a second water-passing filling layer (not shown in the figure) filled between the second permeable pipe and the second isolation filter layer; wherein the first permeable pipe 210 has a first drainage slope toward the second permeable pipe, and the second permeable pipe has a second drainage slope toward the tunnel side ditch 60.
[0032] The second drainage blind ditch 30 and the first drainage blind ditch 20 can adopt the same structural form, and the first drainage slope and the second drainage slope can be consistent or inconsistent. In a preferred example, as a preferred example, the first drainage slope and the second drainage slope are both ≥ 2%. In this way, water can be better discharged into the tunnel ditch 60.
[0033] Specifically, as a preferred example, the permeable cover plate 10 is a ductile iron permeable cover plate 10. The permeable cover plate 10 has a plurality of water holes 110. In a specific example, the size of the permeable cover plate 10 is set to 100×20×3cm (length×width×thickness). The main functions of the permeable cover plate 10 are: ① Drainage function: the permeable cover plate 10 has the function of draining the road surface water into the first drainage blind ditch 20; ② Bearing function: the permeable cover plate 10 has the function of bearing the heavy pressure of vehicles and pedestrians to prevent the road surface structure from sinking; ③ Filtering function: the permeable cover plate 10 has the function of preventing blocks or large-volume particles in the road surface structure from entering the first drainage blind ditch 20, so as to avoid nearby ground water accumulation due to blockage by debris.
[0034] In this application plan, Figure 1 Among them, number 40 is the tunnel lining. Figure 2 The 50 in the middle is the graded inverted arch concrete; by setting up a drainage blind ditch, the drainage path is clear, which can effectively eliminate the seepage of the tunnel pavement structure, reduce the water pressure, and effectively prevent the emergence of new seepage phenomena, especially it can solve the road seepage treatment in areas with obvious leakage or excessive water inflow.
[0035] As a preferred example, the first drainage blind ditch 20 includes a plurality of first sub-drainage blind ditches 240 arranged at intervals along a first direction in the road surface water seepage area 70 and a plurality of second sub-drainage blind ditches 250 arranged at intervals along a second direction in the road surface water seepage area 70, the first sub-drainage blind ditches 240 and the second sub-drainage blind ditches 250 are connected, and the first direction is perpendicular to the second direction. Figure 1As shown, the first sub-drainage blind ditch 240 and the second sub-drainage blind ditch 250 form a criss-cross pattern, dividing the seepage area into small seepage surfaces, and then draining the collected road surface seepage into the tunnel ditch 60 through the blind ditch.
[0036] As a specific example, the spacing distance between two adjacent first sub-drainage blind ditches 240 and the spacing distance between two adjacent second sub-drainage blind ditches 250 are both set between 70-90 cm. As a specific example, the spacing distances are both set to 80 cm. In other embodiments, those skilled in the art can also set them to other values according to actual needs.
[0037] As a preferred example, the first isolation filter layer 220 and the second isolation filter layer are both geotextiles. As a preferred example, the thickness of the geotextile is greater than 1.0 mm, and the weight of the geotextile is greater than 200 g / m2.
[0038] Specifically, as a preferred implementation, the geotextile is made of polyethylene material with excellent corrosion resistance, acid and alkali resistance, and anti-aging properties; the thickness of the geotextile is greater than 1.0 mm; the weight of the geotextile is greater than 200 g / m2; when laying the geotextile, its surface should be smooth without obvious damage, wrinkles, and other defects. At the same time, the geotextile should be closely fitted to the gravel to avoid water leakage. When connecting the geotextile, a special joint should be used to ensure the firmness and sealing of the connection.
[0039] The main functions of geotextiles are: ① Particle prevention function: Blind ditch geotextiles have the function of preventing the loss of particles in the pavement structure or roadbed. ② Filtering function: Blind ditch geotextiles have the function of filtering out large-diameter particles in the surface water on the road to prevent blind ditch blockage. ③ Drainage function: The blind ditch body composed of blind ditch geotextiles and filled gravel has the function of draining the seepage water in the pavement structure and guiding the water from high to low, thereby avoiding the accumulation of water in the tunnel pavement structure.
[0040] As a preferred example, the first water-passing filling layer 230 is a filling layer formed by gravel with a particle size of 5-20 mm filled between the first permeable pipe 210 and the first isolation filter layer 220, and the second water-passing filling layer is a filling layer formed by gravel with a particle size of 5-20 mm filled between the second permeable pipe and the second isolation filter layer.
[0041] Specifically, as a preferred embodiment, the particle size requirements of the first water-passing filling layer 230 and the second water-passing filling layer are as follows: the particle size of the crushed stone is between 5-20 mm. The crushed stone within this range can form a good drainage effect and also maintain the stability of the drainage facilities. It should be noted that it is best not to mix crushed stones larger than 30 mm or smaller than 5 mm; the surface of the crushed stone should be flat, and the surface roughness is preferably less than 5 mm. The particle shape of the crushed stone should be mainly angular and cubic. The crushed stones of this shape can be interlocked to form a relatively stable filling body; the mud content of the crushed stone is preferably less than 2%. Too much mud and sand will affect the drainage effect and even cause pipe blockage; the impurities in the filling crushed stone are preferably controlled below 5%. These impurities will affect the drainage effect and also reduce the stability of the filling body; after construction, the gap between the drainage shell and the crushed stone should be filled, and check whether there is poor drainage in the blind ditch.
[0042] The main functions of the filling layer are: ① Collecting pavement seepage: Filling gravel has the function of quickly collecting seepage in the pavement structure and directing it into the drainage system, effectively reducing rain erosion and damage to the road. ② Slowing down the runoff speed: Filling gravel has the function of slowing down and dispersing the runoff, reducing the speed of the runoff and preventing the loss of particles in the pavement structure or roadbed. ③ Skeleton support: Filling gravel has the function of skeleton support to prevent local sinking of the pavement structure.
[0043] As a preferred example, the first water-permeable pipe 210 and the second water-permeable pipe are both soft water-permeable pipes, and the thickness of the soft water-permeable pipe is greater than 2.5 mm. Specifically, in a preferred embodiment, the appearance of the soft water-permeable pipe should be free of tears, holes, and obvious yarn removal, the steel wire protective material should not fall off, and the steel wire skeleton should be integrated with the pipe wall; the thickness of the soft water-permeable pipe is greater than 2.5 mm; the permeability of the soft water-permeable pipe is not less than 500 mm / h. The main function of the soft water-permeable pipe is to discharge the collected rainwater into the tunnel ditch 60. As an example, the diameters of the first water-permeable pipe 210 and the second water-permeable pipe are both 80 mm. In other embodiments, it can also be set to other values according to actual needs.
[0044] The present application also provides the following specific implementation schemes for reference by those skilled in the art, which are as follows:
[0045] (1) Construction process
[0046] Comprehensively investigate the road surface water seepage situation - break the asphalt pavement layer in the road surface water seepage area 70 - dig a trough body for installing a blind ditch for water supply and drainage - bury the corresponding first permeable pipe 210 and second permeable pipe in the trough body - fill with coarse gravel or crushed stone to form a corresponding filling layer - lay a permeable cover plate 10 - restore the asphalt concrete pavement layer 80 - clean up the site and open it to traffic.
[0047] (2) Construction plan
[0048] ① Find and determine the water outlet point and seepage range: clear the water on the road surface, find the water outlet point and seepage range, and observe the road surface infiltration. The center point with obvious water bubbling or large area infiltration on the road surface is the water outlet point.
[0049] ② Remove the asphalt pavement layer: remove the asphalt pavement layer near the seepage point or the seepage surface.
[0050] ③ Grooving: According to the size of the pavement seepage area 70, divide the seepage surface into squares of 0.8×0.8 meters, such as Figure 1 As shown, a blind ditch body with a width of 12 cm and a depth of 15 cm is excavated using a cutting machine, and the ditch body is connected to the side ditches on both sides of the tunnel.
[0051] ④ Trenching: Chisel and level the bottom of the trench, clean the inside of the trench, level the bottom with a thin layer of mortar, and connect it with the tunnel ditch 60. The slope inside the trench should be ≥2% so that the seepage water can be discharged into the tunnel ditch 60.
[0052] ⑤ Blind ditch layout: Set up a soft permeable pipe with a diameter of 80mm, backfill it with coarse gravel and wrap it with geotextile.
[0053] ⑥ Laying the cover plate: After the blind ditch is arranged, a permeable cover plate 10 is laid on the top of the first drainage blind ditch 20 .
[0054] ⑦ Road surface restoration: After the permeable cover 10 is laid, the asphalt concrete road surface layer 80 is re-paved and traffic is restored.
[0055] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A drainage type pavement seepage treatment structure for an operating tunnel, characterized in that: It includes a permeable cover plate, a first blind drainage ditch set in a road surface water seepage area, and a second blind drainage ditch connecting the first blind drainage ditch and the tunnel ditch, wherein the permeable cover plate is laid on the top of the first blind drainage ditch; The first drainage blind ditch includes a first permeable pipe, a first isolation filter layer wrapped around the first permeable pipe, and a first water-passing filling layer filled between the first permeable pipe and the first isolation filter layer; the second drainage blind ditch includes a second permeable pipe, a second isolation filter layer wrapped around the second permeable pipe, and a second water-passing filling layer filled between the second permeable pipe and the second isolation filter layer; wherein, the first permeable pipe has a first drainage slope toward the second permeable pipe, and the second permeable pipe has a second drainage slope toward the tunnel side ditch.
2. The drainage type pavement seepage treatment structure for operating tunnels according to claim 1, characterized in that: The first drainage blind ditch includes a plurality of first sub-drainage blind ditches arranged at intervals along a first direction in the road surface seepage area and a plurality of second sub-drainage blind ditches arranged at intervals along a second direction in the road surface seepage area, the first sub-drainage blind ditch is connected to the second sub-drainage blind ditch, and the first direction is perpendicular to the second direction.
3. The drainage type pavement seepage treatment structure for operating tunnels according to claim 2, characterized in that: The spacing distance between two adjacent first sub-drainage blind ditches and the spacing distance between two adjacent second sub-drainage blind ditches are both set between 70-90 cm.
4. The drainage type pavement seepage treatment structure for operating tunnels according to claim 2, characterized in that: The first isolation and filtering layer and the second isolation and filtering layer are both geotextiles.
5. The drainage type pavement seepage treatment structure for operating tunnels according to claim 4, characterized in that: The first water-passing filling layer is a filling layer formed by gravel with a particle size of 5-20 mm filled between the first permeable pipe and the first isolation filter layer, and the second water-passing filling layer is a filling layer formed by gravel with a particle size of 5-20 mm filled between the second permeable pipe and the second isolation filter layer.
6. The drainage type pavement seepage treatment structure for operating tunnels according to claim 1, characterized in that: The first drainage slope and the second drainage slope are both ≥2%.
7. The drainage type pavement seepage treatment structure for operating tunnels according to claim 4, characterized in that: The thickness of the geotextile is greater than 1.0 mm, and the weight of the geotextile is greater than 200 g / m2.
8. The drainage type pavement seepage treatment structure for operating tunnels according to claim 1, characterized in that: The first water-permeable pipe and the second water-permeable pipe are both soft water-permeable pipes, and the thickness of the soft water-permeable pipe is greater than 2.5 mm.
9. The drainage type pavement seepage treatment structure for operating tunnels according to claim 1, characterized in that: The water-permeable cover plate is a ductile iron water-permeable cover plate.
10. The drainage type pavement seepage treatment structure for operating tunnels according to claim 1, characterized in that: The diameters of the first water-permeable pipe and the second water-permeable pipe are both 80 mm.