Drainage device and method for short-term water gushing treatment of local bottom plate in tunnel in rainy season

Abstract

The invention provides a drainage device and method for short-term water gushing treatment of local parts of a bottom plate in a tunnel in a rainy season, belongs to the technical field of tunnel drainage construction, and aims to solve the problem that the water gushing amount of the bottom plate of the tunnel is too large due to sudden cracks in the rainy season. The drainage bin is communicated with the central ditch through a drainage pipe, and the inverted rubber water absorption disc is arranged at a strand-shaped serious water gushing part at the bottom of the inverted arch of the tunnel. A movable water retaining structure is arranged in the center water collecting pipe in the direction close to the drainage bin, the movable water retaining structure is closed at ordinary times to prevent silt from entering and prevent sewage in the center ditch from flowing backwards, when the water inflow of a water outlet point is large and the water is converged into the center water collecting pipe, the movable water retaining structure can be automatically opened through water pressure, and the purpose of automatic starting can be achieved. A spiral rotary paddle is arranged in the drainage pipe, water flows in the drainage pipe to drive the rotary paddle to rotate, and pumping and drainage force is formed to drive silt in the pipe to gush out.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel drainage construction, and in particular relates to a drainage device and method for treating short-term water gushing in a local bottom plate of a tunnel due to rainy season. Background Art

[0002] During the construction or operation of a tunnel, water seepage and leakage in the tunnel are common tunnel diseases, especially in the water-rich mountainous areas of the southwest. Due to the influence of the rainy season, the local fissure water in the tunnel varies greatly due to the influence of rainfall, especially on the tunnel floor. Due to the influence of the rainy season, the local water inflow is large in a short period of time and cannot be discharged quickly and in time, resulting in excessive local water pressure, affecting the balance of the entire invert arch and the secondary lining. At present, the general method for dealing with local water inflow on the floor of the tunnel is that when there is a large area of ​​fissure water seepage on the rock surface floor, and the water volume and pressure are small, concrete water blocking is generally used in combination with initial support. The amount of accelerator should be increased in the concrete, and the water should be drained with a soft permeable pipe first, and then continuous pouring should be carried out so that the water flow can be concentrated on the main fissure and enter the annular permeable pipe (such as Figure 1 arrangement shown).

[0003] This method still has many disadvantages. For example, long-term sedimentation of silt in the water will lead to blockage of the permeable pipe and affect the drainage function of the entire secondary lining. Construction before the rainy season cannot reflect the specific peak value of the fissure water volume here. Whether the drainage volume of the embedded pipe is greater than the water gushing volume in a short period of time, resulting in excessive local water pressure, cannot achieve the purpose of reducing risks in advance, and bury great safety hazards for the subsequent operation of the tunnel. Summary of the invention

[0004] In order to solve the above problems, the excessive water inrush from the tunnel floor due to sudden cracks in the rainy season can be discharged promptly and quickly, ensuring that the local water pressure will not be too large, affecting the balance of the entire invert arch and the secondary lining, and ensuring the safety of operation. The present invention proposes a drainage device and method for treating short-term water inrush from the local floor of the tunnel due to the rainy season. The device quickly drains the excessive short-term water inrush from the local area of ​​the tunnel due to the rainy season, plays an auxiliary role in the circumferential and longitudinal drainage of the tunnel, and has the function of self-purification of sediment, providing an effective guarantee for the subsequent operation and use of the tunnel.

[0005] The technical solution adopted by the present invention is:

[0006] In the first aspect, the present invention proposes a drainage device for treating short-term water gushing in a local area of ​​a tunnel floor due to rainy season. The drainage device comprises an inverted rubber water absorption tray, a central water collecting pipe and a drainage bin which are connected in sequence, and the drainage bin is connected to the central ditch through the drainage pipe. The inverted rubber water absorption tray is arranged at a location where water gushing is serious at the bottom of the tunnel invert.

[0007] In some embodiments, a filament composite drainage belt is further provided between the inverted rubber water absorption disc and the severe strand-shaped water gushing portion at the bottom of the tunnel invert.

[0008] In some embodiments, the inverted rubber water absorbent disc is composed of an inner inverted rubber disc and an outer inverted metal disc, the top of the inverted metal disc is plugged into the bottom of the drain pipe, the outer edge of the bottom of the inverted rubber disc extends to the bottom of the inverted metal disc, and a plurality of suction cup units are arranged on its inner wall.

[0009] In some embodiments, the movable water retaining structure includes an inverted conical guide platform, a T-shaped seat is arranged on the top of the inverted conical guide platform, the T-shaped seat is connected to the inner wall of the water collecting pipe through a fixed rod, and a movable water retaining plate is arranged on the outer side of the inverted conical guide platform, and the movable water retaining plate is connected to the fixed rod through a vertical rod.

[0010] In some embodiments, the movable water retaining plate is a circular structure formed by alternately splicing movable water retaining units and fixed water retaining units. Two adjacent fixed water retaining units are connected by a horizontal rod, and the movable water retaining unit is set on the horizontal rod and can rotate around the horizontal rod.

[0011] In some embodiments, an annular positioning groove is provided on the outer wall of the inverted conical guide platform, the inner ends of the movable water retaining unit and the fixed water retaining unit are located in the annular positioning groove, and a plurality of arc guide grooves are provided along the outer wall of the inverted conical guide platform and perpendicular to the direction of the annular positioning groove, the bottom of the arc guide groove is connected to the annular positioning groove, and the inner end of the movable water retaining unit can slide in the arc guide groove.

[0012] In some embodiments, the outer walls and inner walls of the movable water retaining unit and the fixed water retaining unit are both designed with curved surfaces. The outer walls and inner walls of the movable water retaining unit are in sliding contact with the inner wall of the water collecting pipe and the inner wall of the arc-shaped guide groove, and the outer walls and inner walls of the fixed water retaining unit are in sliding contact with the inner wall of the water collecting pipe and the inner wall of the annular guide groove.

[0013] In some embodiments, grooves A concentric with the movable hole are respectively provided on both side walls of the movable water retaining unit, grooves B matching with grooves A are respectively provided on both side walls of the fixed water retaining unit, and torsion springs are provided in adjacent grooves A and B.

[0014] In some embodiments, the bottom of the upright pole is connected to the top wall of the fixed water retaining unit.

[0015] In a second aspect, the present invention proposes a drainage method for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season, and the drainage method comprises the following steps:

[0016] Step 1: When the rainy season comes, due to the increase in precipitation, the amount of water inflow from the fissures in the tunnel increases, and each water inflow point will flow into the central water collecting pipe through the side water collecting pipes and connecting pipes. The increased water pressure pushes the movable water retaining unit to rotate counterclockwise, opening the movable water retaining plate, and rainwater flows into the drainage tank;

[0017] Step 2: When the water level in the drainage tank is higher than the connection between the drainage pipe and the drainage tank, rainwater flows into the drainage pipe, driving the spiral rotating blades to rotate and generate suction force, accelerating the speed of the water flow and quickly flowing to the central ditch.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention lays a filament composite drainage belt at a location with serious water gushing to filter out debris, and an inverted rubber water absorption disk is inverted on the filament composite drainage belt, and the top of the inverted rubber water absorption disk is connected to a water collecting pipe. When there are multiple water gushing points on the same side of the same inverted arch, multiple water collecting pipes are set, one of the water collecting pipes is used as a central water collecting pipe, and the other water collecting pipes are used as side water collecting pipes. The side water collecting pipes are connected to the central water collecting pipe through a connecting pipe, so that multiple water gushing points are drained centrally and the drainage speed is accelerated.

[0020] 2. The inverted rubber water-absorbing disc of the present invention is composed of an inner inverted rubber disc and an outer inverted metal disc. The inverted metal disc can protect the inner inverted rubber disc and is convenient for connecting with the drainage pipe above. Several suction cup units are arranged on the inner wall of the outer edge of the bottom of the inverted rubber disc. When the inverted rubber water-absorbing disc is buckled on the filament composite drainage belt, the entire drainage device will squeeze the inverted rubber water-absorbing disc, and the suction cup unit will fit more closely on the filament composite drainage belt. At the same time, the inverted metal disc is against the ground, which improves the stability of the entire device.

[0021] 3. The movable water retaining structure of the present invention is composed of an inverted cone-shaped guide platform, a T-shaped seat, a fixed rod, a movable water retaining unit and a fixed water retaining unit. The movable water retaining unit is movably connected to the fixed water retaining unit through a horizontal rod, and a torsion spring is arranged between adjacent movable water retaining units and fixed water retaining units. Normally, the movable water retaining unit and the fixed water retaining unit are located on the same plane, that is, they cooperate to form a water retaining cover, which can prevent mud and sand from entering and sewage from flowing back into the central ditch. When the water pressure increases, the movable water retaining unit is squeezed to rotate counterclockwise around the horizontal rod, and the movable water retaining unit is misaligned with the fixed water retaining unit. Its structure is similar to a screen, which can not only pass sewage, but also the fixed water retaining unit can prevent mud and sand from surging up. Moreover, the movable water retaining unit is tilted upward. When rainwater surges up, it will hit the wall of the movable water retaining unit, but because the wall is tilted, it can also prevent mud and sand from moving up, thereby achieving the purpose of filtering.

[0022] 4. In the present invention, a spiral rotating blade is arranged in the drain pipe. When sewage flows into the drainage bin, it drives the spiral rotating blade to generate a pumping force when passing through the drain pipe, thereby accelerating the speed of the water flow. Combined with the multi-hole pumping, it plays a role in reducing the water pressure of the bottom plate. The drainage device is arranged at the intersection of the circumferential and longitudinal drainage of the bottom plate, and the generated pumping force also has a certain self-purification function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the local water gushing and drainage in the tunnel floor at the current stage.

[0025] Figure 2 This is the water gushing condition on the tunnel floor during the rainy season.

[0026] Figure 3 This is a schematic diagram of an inverted rubber water-absorbing disc sealing a water collection point.

[0027] Figure 4 It is a front cross-sectional view of an inverted rubber water-absorbing tray.

[0028] Figure 5 Schematic diagram of the interconnection between water collecting pipes.

[0029] Figure 6 Schematic diagram of the movable water retaining structure in the water collecting pipe.

[0030] Figure 7 This is a schematic diagram of the drainage status of the drainage device.

[0031] Figure 8 This is a top view of the water collecting pipe.

[0032] Fig. 9 It is a top view of the movable water retaining plate.

[0033] Fig.10 It is a schematic diagram of a movable water retaining unit.

[0034] Fig.11 Schematic diagram of a fixed water retaining unit.

[0035] Fig.12 Schematic diagram of the drainage tank.

[0036] Fig.13 This is a front view of the drainage tank.

[0037] Fig.14 A schematic diagram of a spiral blade.

[0038] Fig.15 This is a schematic diagram showing that the drainage bin is connected to the central ditch through a drainage pipe.

[0039] Among them, 1. filament composite drainage belt; 2. inverted rubber water absorption disc; 201. inverted metal disc; 202. inverted rubber disc; 203. suction cup unit; 3. central water collecting pipe; 4. movable water retaining structure; 401. inverted cone guide platform; 402. T-shaped seat; 403. fixed rod; 404. movable water retaining unit; 405. fixed water retaining unit; 406. horizontal rod; 407. vertical rod; 5. drainage bin; 6. drainage pipe; 7. spiral rotating blade; 8. connecting pipe; 9. side water collecting pipe. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0041] Example 1

[0042] On-site data collection shows that the precipitation in the rainy season is relatively high. The water inrush in the tunnel floor during the rainy season is as follows: Figure 2 As shown, the drainage device is designed and developed. Figure 3-15 As shown, a drainage device is specifically provided for treating short-term water inrush in a local part of a tunnel floor due to rainy season, comprising an inverted rubber water absorption plate 2, a central water collecting pipe 3 and a drainage chamber 5 which are connected in sequence, and the drainage chamber 5 is connected to the central ditch through a drainage pipe 6.

[0043] At the bottom of the tunnel invert where water is gushing out seriously, a filament composite drainage belt 1 is laid to filter out debris, and an inverted rubber water absorption plate 2 is inverted on the filament composite drainage belt 1 and connected to the bottom of the central water collecting pipe 3.

[0044] In some embodiments, the inverted rubber water-absorbing disk 2 is as follows Figure 4 As shown, it is composed of an internal inverted rubber disc 202 and an external inverted metal disc 201, the top of the inverted metal disc 201 is plugged into the bottom of the drain pipe 6 and reinforced by screws, the bottom outer edge of the inverted rubber disc 202 extends to the bottom of the inverted metal disc 201, and a plurality of suction cup units 203 are arranged on its inner wall, the suction cup unit 203 is attached to the filament composite drainage belt 1, so as to improve the stability of the inverted rubber water-absorbing disc 2 and extend the service life of the inverted rubber water-absorbing disc 2.

[0045] When the inverted rubber water-absorbing disc 2 is buckled onto the filament composite drainage belt 1, the entire drainage device will squeeze the inverted rubber water-absorbing disc 2, and the suction cup unit 203 will fit more closely onto the filament composite drainage belt 1. At the same time, the inverted metal disc 201 is against the ground, and the inverted rubber disc 202 can be fixed to the ground by screws.

[0046] When there are multiple water gushing points on the same side of the same inverted arch, multiple side water collecting pipes 9 can be provided, and each side water collecting pipe 9 is provided with an inverted rubber water absorbing plate 2 at the bottom, and the inverted rubber water absorbing plate 2 is buckled at the water gushing point. The side water collecting pipe 9 is connected to the central water collecting pipe 3 through a connecting pipe 8.

[0047] A movable water retaining structure 4 is arranged inside the central water collecting pipe 3 near the drainage bin 5. Normally, the movable water retaining structure 4 is closed to prevent mud and sand from entering and sewage from backflowing into the central ditch. When a large amount of water gushes out of the outlet and gathers in the central water collecting pipe 3, the water pressure will automatically push open the movable water retaining structure 4, flow into the drainage bin 5, enter the drainage pipe 6 and be discharged to the central ditch.

[0048] The above pipeline parameter selection process is as follows:

[0049] 1. Determine the amount of water inflow

[0050] 1. Use instruments to measure flow rate, flow rate, and water inflow under normal conditions on site. Assume that the measured flow rate is 0.8m 3 / h, flow rate is 1.0m / s.

[0051] 2. According to the construction drawings, consider the maximum water inflow, and take into account special circumstances and emergencies, select a suitable safety factor for the maximum design water inflow, refer to the design drawings, and perform calculations based on different circumstances.

[0052] ① Use rainfall infiltration method to calculate the maximum water inflow in this section of the tunnel.

[0053] Q=2.74W*A*ɑ

[0054] W: annual rainfall in the region over many years (mm);

[0055] A: underground water collection area of ​​the water body through which the tunnel passes (K㎡);

[0056] ɑ: precipitation infiltration coefficient;

[0057] 2.74- is the calculation constant;

[0058] Q: Maximum water inflow (m 3 / d).

[0059] The maximum water inflow at this location is determined to be Q = 2.74 * 1688 * 0.027 * 0.2 = 24.98m3 / d, that is, 1.04m 3 / h;

[0060] ② Use the runoff modulus method to calculate the maximum water inflow in this section of the tunnel.

[0061] Q=86.4*M*A

[0062] M: runoff modulus (l / sK㎡), calculated according to the annual maximum runoff modulus;

[0063] A: underground water collection area of ​​the water body through which the tunnel passes (K㎡);

[0064] 86.4-Convert from l / s (liter / second) to m 3 / d (tons / day and night) constant;

[0065] Q: Maximum water inflow (m 3 / d).

[0066] The maximum water inflow at this location is determined to be Q = 86.4 * 16.8 * 0.027 = 39.19m 3 / d, that is 1.63m 3 / h.

[0067] 2. Choose a drain pipe

[0068] 1. According to the infiltration method, the maximum water inflow in this section of the tunnel is 1.04m 3 / h, assuming there are two water inflow points in this section, refer to the "Pipe Diameter / Flow Velocity / Flow Rate Comparison Table" to obtain the following flow rates:

[0069] Φ20 steel pipe: flow rate: 1.1m 3 / h>1.04m 3 / h, flow rate: 1.0m / s (measured before), which can meet the requirements.

[0070] There are two water inflow points in this section, so the Φ20 steel pipe is the side water collecting pipe 9, connected to the central water collecting pipe 3, then the maximum water inflow at the central water collecting pipe 3 is 2.08m 3 / h.

[0071] Φ32 steel pipe: flow rate: 2.9m 3 / h>2.08m 3 / h, flow rate: 1.0m / s (measured before), which can meet the requirements.

[0072] At the same time, two Φ20 steel pipes (drain pipe 6) are set at the outlet. When the flow rate is 1.0m / s, the flow rate is:

[0073] 1.1m 3 / h*2=2.2m 3 / h is greater than the total flow rate 2.08m3 / h.

[0074] 2. The method of selecting pipe diameter when using the runoff modulus method for calculation is the same as above.

[0075] Pipe diameter / flow rate / flow rate comparison table

[0076]

[0077] Example 2

[0078] This embodiment introduces the movable water retaining structure 4 based on the embodiment 1.

[0079] like Figure 6-11 As shown, the movable water retaining structure 4 includes an inverted conical guide platform 401, a T-shaped seat 402 is arranged on the top of the inverted conical guide platform 401, the T-shaped seat 402 is connected to the inner wall of the water collecting pipe through a fixed rod 403, and a movable water retaining plate is arranged on the outer side of the inverted conical guide platform 401, and the movable water retaining plate is connected to the fixed rod 403 through a vertical rod 407.

[0080] In this embodiment, the movable water retaining plate is a circular structure formed by alternating movable water retaining units 404 and fixed water retaining units 405. Two adjacent fixed water retaining units 405 are connected by a horizontal rod 406, and the movable water retaining unit 404 is set on the horizontal rod 406 and can rotate around the horizontal rod 406.

[0081] An annular positioning groove is arranged on the outer wall of the inverted conical guide platform 401, and the inner ends of the movable water retaining unit 404 and the fixed water retaining unit 405 are located in the annular positioning groove. A plurality of arc guide grooves are arranged along the outer wall of the inverted conical guide platform 401 and perpendicular to the direction of the annular positioning groove. The bottom of the arc guide groove is connected to the annular positioning groove, and the inner end of the movable water retaining unit 404 can slide in the arc guide groove.

[0082] The outer walls and inner walls of the movable water retaining unit 404 and the fixed water retaining unit 405 are both designed with curved surfaces, that is, the outer walls and inner walls of the movable water retaining unit 404 are in sliding contact with the inner wall of the water collecting pipe and the inner wall of the arc guide groove, and the outer walls and inner walls of the fixed water retaining unit 405 are in sliding contact with the inner wall of the water collecting pipe and the inner wall of the annular guide groove.

[0083] The movable water retaining unit 404 is provided with grooves A concentric with the movable hole on both side walls, and the fixed water retaining unit 405 is provided with grooves B matching with the grooves A on both side walls, and torsion springs are provided in adjacent grooves A and B. In the natural state, under the action of the torsion springs, the movable water retaining unit 404 and the fixed water retaining unit 405 are located on the same plane, and the tight fit can prevent the entry of mud and sand and the backflow of sewage from the central ditch.

[0084] In this embodiment, the bottom of the vertical rod 407 is connected to the top wall of the fixed water retaining unit 405 .

[0085] In this embodiment, five fixing rods 403 are provided, which can be welded on the inner wall of the water collecting pipe. Correspondingly, five vertical rods 407 are also provided, and the five vertical rods 407 are evenly spaced and fixed on the top walls of the five fixed water retaining units 405 for connection.

[0086] During processing, first make the inverted cone guide platform 401, process the annular positioning groove and the arc guide groove on the outer wall of the inverted cone guide platform 401, then make the T-shaped seat 402 and the fixed rod 403, and weld or screw them to the top of the inverted cone guide platform 401. Finally, process the movable water retaining plate, and move the movable water retaining plate from the bottom of the inverted cone guide platform 401 to the inner ends of the movable water retaining unit 404 and the fixed water retaining unit 405 located in the annular positioning groove. Place the manufactured movable water retaining structure 4 inside one end of the water collecting pipe connected to the drainage bin 5, and weld the outer end of the fixed rod 403 to the inner wall of the water collecting pipe, or use a reinforcing sheet (welded to the outer end of the fixed rod 403, attached to the inner wall of the water collecting pipe) to fix it to the inner wall of the water collecting pipe by screws.

[0087] During the processing, the horizontal rod 406 first passes through the movable hole of the movable water retaining unit 404 , and then the two ends of the horizontal rod 406 are welded to the side walls of the two adjacent fixed water retaining units 405 .

[0088] When the water flow from the outlet is large and gathers into the water collecting pipe, the water pressure will squeeze the movable water retaining plate, and the movable water retaining unit 404 will rotate around the horizontal rod 406 under the action of the water pressure, and due to the limitation of the annular positioning groove, the movable water retaining unit 404 can only rotate counterclockwise at this time, and its inner end slides along the arc guide groove, the movable water retaining plate is opened, and the rainwater is discharged into the drainage chamber 5 through the water collecting pipe. When the water pressure drops, it is reset under the action of the torsion spring.

[0089] Example 3

[0090] In this embodiment, the structures of the drainage bin 5 and the drainage pipe 6 are described in detail.

[0091] A spiral rotating blade 7 is arranged inside the drain pipe 6, and both ends of the spiral rotating blade 7 are connected to the inner wall of the drain pipe 6 through a rotating frame. The rotating frame can be composed of a bearing and a fixed frame, and the bearing is located at the center of the fixed frame and is rotatably connected to the central axis of the spiral rotating blade 7. When water flows in the drain pipe 6, it drives the rotating blade to rotate, forming a pumping force to accelerate the discharge of water, thereby driving the sediment in the pipe to gush out, forming a self-cleaning function.

[0092] A support frame is provided at the outlet end of the drain pipe 6, which supports the drain pipe 6 and is set up near the central ditch. The support frame is composed of a steel structure, a fixing seat is provided on the top, a groove is provided on the top of the fixing seat, and the drain pipe 6 is located in the groove and fits with the inner wall of the groove.

[0093] In this embodiment, a sealing cover is provided on the top of the drainage bin 5 , and the sealing cover is sealed on the drainage bin 5 by snapping.

[0094] During the burial process, the entire drainage device is set between the longitudinal and annular drainage rooms and is close to the central ditch to facilitate on-site construction and maintenance.

[0095] So far, this embodiment also provides a drainage method for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season, which specifically includes the following steps:

[0096] Step 1: When the rainy season comes, due to the increase in precipitation, the amount of water inflow from the fissures in the tunnel increases, and each water inflow point will flow into the central water collecting pipe 3 through the side water collecting pipe 9 and the connecting pipe 8. The increased water pressure pushes the movable water retaining unit 404 to rotate counterclockwise, opening the movable water retaining plate, and the rainwater flows into the drainage chamber 5;

[0097] Step 2: When the water level in the drainage chamber 5 is higher than the connection port between the drainage pipe 6 and the drainage chamber 5, rainwater flows into the drainage pipe 6, driving the spiral rotating blades 7 to rotate and generate a pumping force, thereby accelerating the speed of the water flow and quickly flowing to the central ditch.

[0098] The use of upper multi-hole drainage can reduce the water pressure of the bottom plate, and the drainage device is arranged at the intersection of the circumferential and longitudinal drainage of the bottom plate. The generated drainage force also has a certain self-purification function.

[0099] The embodiments described above are only preferred specific implementation modes of the present invention, and the protection scope of the present invention is not limited thereto. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with the field within the technical scope disclosed in the present invention belong to the protection scope of the present invention.

Claims

1. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season, characterized in that: The drainage device includes an inverted rubber water absorption tray, a central water collecting pipe and a drainage chamber which are connected in sequence, and the drainage chamber is connected to the central ditch through the drainage pipe. The inverted rubber water absorption tray is arranged at a location where water gushing is serious at the bottom of the tunnel invert.

2. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season according to claim 1, characterized in that: A filament composite drainage belt is also provided between the inverted rubber water absorption plate and the severe strand-shaped water gushing part at the bottom of the tunnel invert.

3. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season according to claim 2, characterized in that: The inverted rubber water-absorbing disc is composed of an inner inverted rubber disc and an outer inverted metal disc. The top of the inverted metal disc is plugged into the bottom of the drain pipe. The outer edge of the bottom of the inverted rubber disc extends to the bottom of the inverted metal disc, and a plurality of suction cup units are arranged on its inner wall.

4. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season according to claim 1, characterized in that: The movable water retaining structure includes an inverted cone guide platform, a T-shaped seat is arranged on the top of the inverted cone guide platform, the T-shaped seat is connected to the inner wall of the water collecting pipe through a fixed rod, a movable water retaining plate is arranged on the outside of the inverted cone guide platform, and the movable water retaining plate is connected to the fixed rod through a vertical rod.

5. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season according to claim 4, characterized in that: The movable water retaining plate is a circular structure formed by alternately splicing movable water retaining units and fixed water retaining units. Two adjacent fixed water retaining units are connected by a horizontal rod, and the movable water retaining unit is set on the horizontal rod and can rotate around the horizontal rod.

6. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season according to claim 5, characterized in that: An annular positioning groove is arranged on the outer wall of the inverted cone guide platform, and the inner ends of the movable water retaining unit and the fixed water retaining unit are located in the annular positioning groove. A plurality of arc guide grooves are arranged along the outer wall of the inverted cone guide platform and perpendicular to the direction of the annular positioning groove. The bottom of the arc guide groove is connected with the annular positioning groove, and the inner end of the movable water retaining unit can slide in the arc guide groove.

7. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season according to claim 6, characterized in that: The outer walls and inner walls of the movable water retaining unit and the fixed water retaining unit are both designed with curved surfaces. The outer walls and inner walls of the movable water retaining unit are in sliding contact with the inner wall of the water collecting pipe and the inner wall of the arc guide groove, and the outer walls and inner walls of the fixed water retaining unit are in sliding contact with the inner wall of the water collecting pipe and the inner wall of the annular guide groove.

8. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season according to claim 7, characterized in that: The movable water retaining unit has two side walls respectively provided with grooves A concentric with the movable hole, and the fixed water retaining unit has two side walls respectively provided with grooves B matching with the grooves A, and adjacent grooves A and B are provided with torsion springs.

9. A drainage device for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season according to claim 8, characterized in that: The bottom of the vertical pole is connected with the top wall of the fixed water retaining unit.

10. A drainage method for treating short-term water inrush in a local area of ​​a tunnel floor due to rainy season, characterized in that: The drainage device according to any one of claims 1 to 9 is used for drainage, and the drainage method comprises the following steps: Step 1: When the rainy season comes, due to the increase in precipitation, the amount of water inflow from the fissures in the tunnel increases, and each water inflow point will flow into the central water collecting pipe through the side water collecting pipes and connecting pipes. The increased water pressure pushes the movable water retaining unit to rotate counterclockwise, opening the movable water retaining plate, and rainwater flows into the drainage tank; Step 2: When the water level in the drainage tank is higher than the connection between the drainage pipe and the drainage tank, rainwater flows into the drainage pipe, driving the spiral rotating blades to rotate and generate suction force, accelerating the speed of the water flow and quickly flowing to the central ditch.

Images