Pressure-limiting discharge structure for tunnel to pass through large-scale strong-flowing-water underground river

Abstract

The invention discloses a pressure-limiting discharge structure for a tunnel to pass through a large strong flowing water underground river, and belongs to the technical field of tunnel construction, the pressure-limiting discharge structure comprises the tunnel and the underground river, a drainage tunnel is arranged below the underground river, a plurality of communication structures are arranged between the drainage tunnel and the underground river, and the communication structures are used for communicating the drainage tunnel with the underground river; a drainage ditch is formed in the bottom of the tunnel, a drainage pipe communicated with the underground river is arranged at the bottom of the drainage ditch, a check block used for blocking the drainage pipe is slidably connected into the drainage pipe, a plurality of supporting rods are arranged at the bottom of the check block, and a plurality of supports are arranged in the drainage pipe. The supporting rods penetrate through the corresponding supports and are in sliding connection with the supports, and hydraulic buffers are arranged between the supporting rods and the supports. An annular groove is coaxially formed in the inner wall of the drainage pipe and located between the device support and the check block. The problem that the danger to the tunnel is increased when the underground river water level rises is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction, and particularly relates to a pressure-limiting discharge structure for a tunnel to cross a large-scale strong-flowing underground river. Background Art

[0002] With the rapid development of social economy, the problem of traffic congestion has become increasingly serious. As an important part of the transportation industry, tunnels can effectively relieve traffic pressure. However, due to various factors, during tunnel construction, tunnels are often adjacent to underground rivers. Since there are karst fissures in the mountain body, the water gushing from the underground river will damage the safety of tunnel construction or tunnel operation. In addition, when it rains, the underground river in the mountain body is replenished by atmospheric precipitation, the water level rises, and the water head pressure increases, which greatly aggravates the harm of the underground river to the tunnel. Summary of the Invention

[0003] In view of this, the present invention discloses a pressure-limiting discharge structure for a tunnel to cross a large-scale strong-flowing underground river, and its purpose is to solve the problem that the danger to the tunnel increases when the water level of the underground river rises.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A pressure-limiting discharge structure for a tunnel to cross a large-scale strong-flowing underground river includes a tunnel and an underground river. A drainage tunnel is provided obliquely below the underground river, and a plurality of communication structures are provided between the drainage tunnel and the underground river, and the communication structures are used to connect the drainage tunnel and the underground river; a drainage ditch is provided at the bottom of the tunnel, and a drain pipe communicating with the underground river is provided at the bottom of the drainage ditch. A blocking block for blocking the drain pipe is slidably connected inside the drain pipe. A plurality of support rods are provided at the bottom of the blocking block. A plurality of supports are provided inside the drain pipe. The support rods penetrate through the corresponding supports and are slidably connected therewith, and hydraulic buffers are provided between the support rods and the supports; an annular groove is coaxially provided on the inner wall of the drain pipe, and the groove is located between the device support and the blocking block.

[0006] In this solution, when it rains, the underground river is connected to the drainage tunnel through the communication structure, and part of the gushing water in the underground river is discharged to prevent the underground river from rising and causing the water level in the underground river to rise, thereby damaging tunnel construction or affecting tunnel operation; in addition, when the drainage tunnel cannot meet the drainage requirement, the water flow surges into the drain pipe, and then pushes the blocking block to move towards the drainage ditch until the blocking block extends into the drainage ditch, and then the gushing water is introduced into the drainage ditch and discharged out of the tunnel uniformly, preventing the gushing water from overflowing into the tunnel through the karst fissures and damaging tunnel construction or affecting tunnel operation; at the same time, when there is a large amount of accumulated water in the tunnel and it cannot be discharged, the accumulated water squeezes the blocking block downward in the drainage ditch, so that the blocking block is located in the groove, and the accumulated water flows into the underground river through the groove to assist the tunnel in draining water.

[0007] Further, the connecting structure includes a pipeline. Inside one end of the pipeline facing the underground river, a ring-shaped bracket is rotatably arranged coaxially, and several fan blades are fixed in the middle of the bracket. Above the bracket, there is a hollow cylinder body. The cylinder body is slidably connected inside the pipeline. At the top end of the cylinder body, there is a buoyancy block for closing the end of the cylinder body. On the circumferential side of the cylinder body, there are several vertically arranged water inlet grooves. On the bottom end face of the cylinder body, there are several guiding holes. On the circumferential side of the upper end of the bracket, there are several guiding rods extending into and slidably connected with the corresponding guiding holes.

[0008] In this solution, when the water level of the underground river is normal, the water inlet grooves are submerged in the pipeline, and the water flow of the underground river cannot flow into the pipeline, avoiding the reduction of the water level of the underground river and affecting the normal ecology of the underground river. When the water level of the underground river rises due to rainy days, the cylinder body moves upward with the rise of the water surface through the buoyancy block, and then the water inlet grooves are exposed at the corresponding height, allowing the water flow to enter the pipeline and be discharged to the drainage tunnel, preventing the rise of the water level of the underground river from affecting the safety of the tunnel. In addition, when the water flow passes through the fan blades, it drives the fan blades to rotate, and the fan blades drive the cylinder body to rotate through the bracket, making the water flow on the circumferential side of the cylinder body form a rotation, preventing the gravel in the water flow from entering the pipeline and causing blockage.

[0009] Further, filter screens are arranged in the water guiding grooves, and protective devices are arranged on the water guiding grooves. The protective devices include several baffles hinged to one side of the corresponding water guiding grooves. The movable ends of the baffles are all hinged with connecting plates. Both the baffles and the connecting plates are arc-shaped. On the other side of the water guiding grooves, chutes corresponding to the baffles are opened. The protective devices also include sliding seats slidably connected in the chutes. The sliding seats are hinged to the ends of the corresponding connecting plates. Elastic buffer members are arranged between the sliding seats and the chutes. Both the baffles and the connecting plates are located inside the water guiding grooves.

[0010] In this solution, by arranging the filter screens, a filtering effect is achieved to prevent the gravel in the underground river from entering the pipeline and causing blockage. In addition, when the gravel moves towards the filter screen, the gravel first impacts on the baffle or the connecting plate, and then drives the baffle and the connecting plate to move towards the filter screen. In addition, the connecting plate pushes the sliding seat to squeeze the elastic buffer member, playing an energy-consuming role to prevent the gravel from directly impacting on the filter screen and damaging the filter screen, providing further protection for the connecting structure.

[0011] Further, a communication groove is opened between the water inlet groove and the chute. Inside the communication groove, a vertically arranged rotating shaft is rotatably connected. The rotating shaft is fixedly connected to the end of the baffle. A gear is coaxially fixed at the top end of the rotating shaft. An arc-shaped toothed plate is fixed on the sliding block. The toothed plate and the sliding track of the sliding block are coaxial. The toothed plate extends into the adjacent communication groove and meshes with the corresponding gear.

[0012] Further, the longitudinal section of the stop block is arc-shaped.

[0013] Further, a waterproof layer is poured between the tunnel and the underground river.

[0014] Further, water-permeable holes are provided on both the baffle and the connecting plate.

[0015] Other advantages, objectives and features of the present invention will be described in the subsequent description, and to some extent will be obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0018] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0019] Figure 3 is Figure 1 an enlarged schematic view of part B in

[0020] Figure 4 It is a schematic structural diagram of the cylinder body in an embodiment of the present invention;

[0021] Figure 5 It is a transverse sectional view of the cylinder body in an embodiment of the present invention.

[0022] The reference signs in the drawings are as follows: tunnel 1, underground river 2, drainage ditch 3, drain pipe 4, stop block 5, support rod 6, support 7, hydraulic buffer 8, pipeline 9, bracket 10, fan blade 11, cylinder body 12, buoyancy block 13, guide rod 14, filter screen 15, baffle 16, connecting plate 17, sliding seat 18, elastic buffer 19, rotating shaft 20, water-proof layer 21, drainage tunnel 22, groove 23, groove 23, gear 24, toothed plate 25. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] As Figures 1 to 4 shown:

[0024] The pressure-limiting discharge structure for Tunnel 1 passing through a large and strong-flowing underground river 2 includes Tunnel 1 and the underground river 2. A drainage tunnel 22 is arranged obliquely below the underground river 2, and a number of connecting structures are arranged between the drainage tunnel 22 and the underground river 2 for connecting the drainage tunnel 22 and the underground river 2. A drainage ditch 3 is arranged at the bottom of Tunnel 1, and a drain pipe 4 communicating with the underground river 2 is arranged at the bottom of the drainage ditch 3. A block 5 for blocking the drain pipe 4 is slidably connected inside the drain pipe 4. A number of support rods 6 are arranged at the bottom of the block 5. A number of supports 7 are arranged inside the drain pipe 4. The support rods 6 penetrate through the corresponding supports 7 and are slidably connected therewith, and hydraulic buffers 8 are arranged between the support rods 6 and the supports 7. An annular groove 23 is coaxially arranged on the inner wall of the drain pipe 4, and the groove 23 is located between the support 7 of the device and the block 5.

[0025] In this solution, when it rains, the underground river 2 is connected to the drainage tunnel 22 through the connecting structure, and part of the gushing water in the underground river 2 is discharged to prevent the rise of the underground river 2 and the consequent rise of the water level in the underground river 2, which may damage the construction of Tunnel 1 or affect its operation. In addition, when the drainage tunnel 22 cannot meet the drainage requirements, the water flows into the drain pipe 4, pushing the block 5 towards the drainage ditch 3 until the block 5 extends into the drainage ditch 3, guiding the gushing water into the drainage ditch 3 and discharging it out of Tunnel 1 uniformly, preventing the gushing water from overflowing into Tunnel 1 through karst fissures and damaging the construction of Tunnel 1 or affecting its operation. At the same time, when there is a large amount of accumulated water in Tunnel 1 and it cannot be discharged, the accumulated water presses the block 5 downward in the drainage ditch 3, causing the block 5 to be located in the groove 23, allowing the accumulated water to flow into the underground river 2 through the groove 23 to assist in draining Tunnel 1.

[0026] Under normal conditions, the block 5 can isolate the underground river 2 from Tunnel 1, preventing the water vapor in the underground river 2 from floating into Tunnel 1 and eroding Tunnel 1.

[0027] In this embodiment, the connecting structure includes a pipe 9. An annular bracket 10 is coaxially and rotatably arranged inside one end of the pipe 9 facing the underground river 2. A number of fan blades 11 are fixed in the middle of the bracket 10. A hollow cylinder 12 is arranged above the bracket 10. The cylinder 12 is slidably connected inside the pipe 9. A buoyancy block 13 for closing the end of the cylinder 12 is arranged at the top of the cylinder 12. A number of vertically arranged water inlet grooves are arranged on the circumferential side of the cylinder 12. A number of guide holes are arranged on the bottom end face of the cylinder 12, and a number of guide rods 14 extending into the corresponding guide holes and slidably connected therewith are arranged on the circumferential side of the upper end of the bracket 10.

[0028] In this solution, when the water level of the underground river 2 is normal, the water inlet tank is submerged in the pipeline 9, and the water flow of the underground river 2 cannot flow into the pipeline 9, avoiding the decrease of the water level of the underground river 2 and affecting the normal ecology of the underground river 2; when the water level of the underground river 2 rises due to the influence of rain, the buoyancy block 13 makes the cylinder 12 move upward with the rising water surface, and then makes the water inlet tank expose the corresponding height, allowing the water flow to enter the pipeline 9 and be discharged to the drainage tunnel 22, preventing the rising water level of the underground river 2 from affecting the safety of the tunnel 1. In addition, when the water flow passes through the fan blades 11, the fan blades 11 are driven to rotate, and the fan blades 11 drive the cylinder 12 to rotate through the support 10, so that the water flow on the circumferential side of the cylinder 12 forms a rotation, preventing the gravel in the water flow from entering the pipeline 9 and causing blockage.

[0029] In this embodiment, filter screens 15 are arranged in the water guide grooves, and protective devices are arranged on the water guide grooves. The protective devices include a plurality of baffles 16 hinged to one side of the corresponding water guide grooves. Connecting plates 17 are hinged to the movable ends of the baffles 16. Both the baffles 16 and the connecting plates 17 are arc-shaped. Sliding grooves corresponding to the baffles 16 are opened on the other sides of the water guide grooves. The protective devices further include sliding seats 18 slidably connected in the sliding grooves. The sliding seats 18 are hinged to the ends of the corresponding connecting plates 17. Elastic buffer members 19 are arranged between the sliding seats 18 and the sliding grooves. The baffles 16 and the connecting plates 17 are both located in the water guide grooves.

[0030] In this solution, by arranging the filter screens 15, a filtering effect is achieved, preventing the gravel in the underground river 2 from entering the pipeline 9 and causing blockage; in addition, when the gravel moves towards the filter screens 15, the gravel first impacts on the baffles 16 or the connecting plates 17, and then drives the baffles 16 and the connecting plates 17 to move towards the filter screens 15. In addition, the connecting plates 17 push the sliding seats 18 to squeeze the elastic buffer members 19, playing an energy-consuming role, preventing the gravel support 10 from impacting on the filter screens 15 and causing damage to the filter screens 15, and providing further protection for the communication structure.

[0031] In this embodiment, a communication groove is opened between the water inlet tank and the sliding groove. A vertically arranged rotating shaft 20 is rotatably connected in the communication groove. The rotating shaft 20 is fixedly connected to the end of the baffle 16. A gear 24 is coaxially fixed at the top of the rotating shaft 20. An arc-shaped toothed plate 25 is fixed on the slider. The toothed plate 25 and the sliding track of the slider are coaxial. The toothed plate 25 extends into the adjacent communication groove and meshes with the corresponding gear 24.

[0032] Using the synchronous rod, when the gravel impacts one of the baffles 16 or the connecting plates 17, the corresponding slider is pushed to slide. The slider drives the corresponding gear 24 to rotate through the toothed plate 25. The gear 24 drives the baffles 16 at the same height in the adjacent water inlet tank to deflect towards the filter screen 15 through the rotating shaft 20, and then drives the corresponding slider to slide through the connecting plate 17, playing an auxiliary energy-consuming role. Through the above settings, the sliders at the same height can be synchronously slid, expanding the energy-consuming efficiency.

[0033] In this embodiment, the longitudinal section of the stopper 5 is arc-shaped.

[0034] The arc-shaped stopper 5 can prevent the water flow from jetting out and flying away from the drainage ditch 3.

[0035] In this embodiment, a water isolation layer 21 is poured between the tunnel 1 and the underground river 2; further preventing the underground river 2 from eroding the tunnel 1.

[0036] In this embodiment, water permeable holes are provided on both the baffle 16 and the connecting plate 17; reducing the obstruction of the water inflow into the water inlet tank by the stopper 5 and the connecting plate 17.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in terms of form and details without departing from the scope defined by the claims of the present invention.

Claims

1. Pressure-limiting discharge structure for a tunnel passing through a large and strongly flowing underground river, comprising a tunnel and an underground river, characterized in that: A drain hole is arranged obliquely below the underground river. A number of connecting structures are arranged between the drain hole and the underground river, and the connecting structures are used to connect the drain hole and the underground river. A drainage ditch is arranged at the bottom of the tunnel, and a drain pipe communicating with the underground river is arranged at the bottom of the drainage ditch. A block for blocking the drain pipe is slidably connected inside the drain pipe. A number of support rods are arranged at the bottom of the block. A number of supports are arranged inside the drain pipe. The support rods penetrate through the corresponding supports and are slidably connected therewith, and hydraulic buffers are arranged between the support rods and the supports. An annular groove is coaxially arranged on the inner wall of the drain pipe, and the groove is located between the device support and the block.

2. The pressure-limiting discharge structure for a tunnel to cross a large and strong-flowing underground river according to claim 1, wherein: The connecting structure includes a pipe. An annular bracket is coaxially and rotatably arranged inside one end of the pipe facing the underground river. A number of fan blades are fixed in the middle of the bracket. A hollow cylinder is arranged above the bracket. The cylinder is slidably connected inside the pipe. A buoyancy block for closing the end of the cylinder is arranged at the top end of the cylinder. A number of vertically arranged water inlet grooves are arranged on the circumferential side of the cylinder. A number of guide holes are arranged on the bottom end surface of the cylinder. A number of guide rods extending into and slidably connected with the corresponding guide holes are arranged on the circumferential side of the upper end of the bracket.

3. The pressure-limiting discharge structure for a tunnel to cross a large and strong-flowing underground river according to claim 2, characterized in that: Filter meshes are arranged in the water guide grooves, and protective devices are arranged on the water guide grooves. The protective devices include a number of baffles hinged to one side of the corresponding water guide grooves. Connecting plates are hinged to the movable ends of the baffles. The baffles and the connecting plates are both arc-shaped. Chutes corresponding to the baffles are opened on the other side of the water guide grooves. The protective devices further include sliding seats slidably connected inside the chutes. The sliding seats are hinged to the ends of the corresponding connecting plates. Elastic buffers are arranged between the sliding seats and the chutes. The baffles and the connecting plates are both located inside the water guide grooves.

4. The pressure-limiting discharge structure for a tunnel to cross a large and strong-flowing underground river according to claim 3, characterized in that: Synchronizing rods are arranged between the vertically adjacent baffles.

5. The pressure-limiting discharge structure for a tunnel to cross a large and strong-flowing underground river according to claim 4, wherein: The longitudinal section of the block is arc-shaped.

6. The pressure-limiting discharge structure for a tunnel to cross a large and strong-flowing underground river according to claim 5, characterized in that: A waterproof layer is cast between the tunnel and the underground river.

7. The pressure-limiting discharge structure for a tunnel to cross a large and strong-flowing underground river according to claim 6, characterized in that: Water permeable holes are arranged on the baffles and the connecting plates.

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