Double-hole concentrated water outlet check valve structure for guiding and discharging ultra-large-flow high-permeability water and construction method of double-hole concentrated water outlet check valve structure

Abstract

The double-hole concentrated water outlet check valve structure comprises a plurality of water diversion steel pipes, seamless steel pipes and drainage pipes, the water diversion steel pipes are arranged below the side of a lining, one ends of the water diversion steel pipes are located in surrounding rock of a water seepage area on the outer side of the lining, and the other ends of the water diversion steel pipes extend into the lining; the drainage pipe is located at the bottom of the lining, the two ends of the seamless steel pipe are connected with the water diversion steel pipes and the drainage pipe respectively, each water diversion steel pipe is sleeved with the corresponding film bag, a gate valve is arranged on the side, close to the seamless steel pipe, of each film bag, and a check valve is arranged at a water outlet of the drainage pipe. The underground water outside the tunnel is led to the water collecting pit reserved in the bottom plate of the lining, surface surrounding rock and a concrete structure are prevented from being damaged by overlarge water pressure outside the lining, the method is suitable for the condition of large-flow underground water, the water diversion stability and safety are improved, the film bag can resist long-time high-pressure water flow scouring, the service life of the system can be prolonged, and the maintenance cost can be reduced.

Description

Technical Field

[0001] The invention relates to the field of tunnel groundwater drainage design, and in particular to a double-hole centralized water outlet check valve structure for draining ultra-large flow and high-permeability water and a construction method thereof. Background Art

[0002] Groundwater control is a critical issue in hydropower projects and tunnel construction. Groundwater management becomes particularly difficult in areas with complex geological conditions, such as areas with loose and broken shallow surrounding rock and developed karst grooves in deep surrounding rock. The surrounding rock in these areas often exhibits large-scale and large-flow water discharge characteristics, which traditional groundwater grouting and plugging control methods often have difficulty coping with, and may even cause serious structural problems such as lining cracking or water pressure failure. Traditional groundwater control methods include grouting and plugging, but these methods have limited effectiveness in areas with ultra-large flow and high permeability water. Grouting methods are not effective under conditions of high rock porosity and fast water flow because the slurry is difficult to distribute evenly in the rock cracks. Plugging methods also face challenges when dealing with ultra-large flow water because the water flow pressure may overturn initial plugging measures and cause water to leak through new or old channels.

[0003] In addition, there is a drainage system, which is to lead groundwater to the surface or safe areas through pipes. The existing drainage system still has limitations in dealing with extreme flow and high pressure conditions. The design of a single water outlet point can lead to uneven water output, excessive pipe pressure and even pipe rupture under ultra-large flow conditions. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a double-hole centralized water outlet check valve structure for draining ultra-large flow and high permeability water, which can solve the problem of groundwater leakage in ultra-large flow and high permeability water areas.

[0005] To this end, the present invention adopts the following technical solutions: A double-hole centralized water outlet check valve structure for draining ultra-large flow and high-permeability water, comprising a plurality of water diversion steel pipes, seamless steel pipes and diversion and drainage pipes arranged below the lining side, one end of the water diversion steel pipe is located in the surrounding rock of the seepage area outside the lining, the other end of the water diversion steel pipe extends into the lining, the diversion and drainage pipes are located at the bottom of the lining, the two ends of the seamless steel pipe are respectively connected to the water diversion steel pipe and the diversion and drainage pipes, each of the water diversion steel pipes is respectively provided with a membrane bag on the outside, each of the membrane bags is respectively provided with a gate valve on the side close to the seamless steel pipe, and a check valve is provided at the water outlet of the diversion and drainage pipe.

[0006] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination: The outlet of the drainage pipe is higher than the bottom surface of the lining.

[0007] A sump is provided on the bottom surface of the lining, and the outlet of the drainage pipe corresponds to the position of the sump.

[0008] The inner walls of the gate valve and the check valve are coated with an anti-corrosion coating.

[0009] The outlet of the drainage pipe is at least 5 cm higher than the lining bottom plate.

[0010] The outlet direction of the check valve is vertically upward.

[0011] The purpose of the present invention is also to overcome the deficiencies of the above-mentioned prior art and provide a construction method of a double-hole centralized water outlet check valve structure for draining ultra-large flow and high permeability water, which can solve the problem of groundwater leakage in areas with ultra-large flow and high permeability water.

[0012] To this end, the present invention adopts the following technical solutions: A construction method of a double-hole centralized water outlet check valve structure for draining ultra-large flow and high-permeability water comprises the following steps: 1. Geological survey and location selection: First, conduct a detailed geological survey to determine the geological structure of the tunnel, especially the hydrogeological conditions. According to the survey results, select several groups of optimal groundwater diversion and drainage points in the tunnel surrounding rock with ultra-large flow and high permeability water. Each group has two groundwater diversion and drainage points to ensure that the two groundwater diversion and drainage points can effectively disperse the groundwater flow and reduce the impact on the tunnel structure. Set a sump on the tunnel floor; 2. Material preparation: prepare a number of water diversion steel pipes, membrane bags, gate valves, seamless steel pipes, diversion and drainage pipes and check valves; 3. Install the water diversion steel pipe and membrane bag: Drill a large diameter hole at the predetermined groundwater diversion and drainage point, install the water diversion steel pipe vertically in the hole, put a membrane bag on the outside of the water diversion steel pipe, and fix the membrane bag and the water diversion steel pipe with a sealing tie to ensure sealing and stability; 4. Connect the gate valve: Install the gate valve at the end of each membrane bag; 5. Arrange seamless steel pipe and lock nut: connect the gate valve to the seamless steel pipe through the lock nut; 6. Install the drainage pipe and check valve: The other end of the seamless steel pipe is connected to the drainage pipe, and a check valve is installed at the outlet end of the drainage pipe. The outlet of the check valve is designed to be vertically upward and correspond to the position of the sump.

[0013] Compared with the prior art, the present invention, by setting a number of water diversion steel pipes, seamless steel pipes and drainage pipes, diverts groundwater outside the tunnel to the sump reserved in the lining bottom plate, thereby avoiding excessive water pressure outside the lining that damages the surface surrounding rock and concrete structure. The present invention is suitable for large-flow groundwater conditions, improves the stability and safety of water diversion, and the membrane bags can withstand long-term high-pressure water flow erosion, which can extend the service life of the system and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent elements with the same or similar functions. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as limitations on the present invention. In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted, and the positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as limitations on the present invention.

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0017] The present invention provides a double-hole centralized water outlet check valve structure for diverting and discharging ultra-large flow and high-permeability water, comprising a plurality of water diversion steel pipes 1 arranged below the side of a lining 6, as well as a seamless steel pipe 4 and a diversion and discharge pipe 5. One end of the water diversion steel pipe 1 is located in the surrounding rock of the seepage area outside the lining 6, and the other end of the water diversion steel pipe 1 extends into the lining 6. The diversion and discharge pipe 5 is located at the bottom of the lining 6. The two ends of the seamless steel pipe 4 are respectively connected to the water diversion steel pipe 1 and the diversion and discharge pipe 5. A membrane bag 2 is respectively sheathed on the outside of each water diversion steel pipe 1, and a gate valve 3 is respectively arranged on the side of each membrane bag 2 close to the seamless steel pipe 4. A check valve 8 is arranged at the water outlet of the diversion and discharge pipe 5.

[0018] The water diversion steel pipe 1 is a large diameter steel pipe.

[0019] In this embodiment, the diameter of the water diversion steel pipe 1 is between 108 mm and 150 mm.

[0020] In this embodiment, each seamless steel pipe 4 is connected to two water diversion steel pipes 1, and the two water diversion steel pipes 1 are connected to their respective membrane bags 2, so that water can be diverted and discharged from two places at the same time, effectively dispersing the water pressure and reducing the risks caused by ultra-high flow at a single point. Each membrane bag 2 is respectively provided with a gate valve 3 to help control the water flow diverted from the surrounding rock, while protecting the surrounding rock from being damaged by water erosion. The check valve 8 maintains a discharge state under high pressure conditions to prevent water backflow and ensure the safety inside the tunnel.

[0021] In this embodiment, the gate valve 3 and the seamless steel pipe 4 are connected by a lock nut to ensure the sealing and stability of the connection and prevent leakage under high flow water pressure. The membrane bag 2 is made of special high-strength waterproof material to adapt to the long-term erosion of high-pressure water flow and ensure the long-term stability and safety of the system.

[0022] In this embodiment, the film bag 2 is made of high-density polyethylene.

[0023] In this embodiment, the check valve 8 can be manually closed in an emergency situation to increase the emergency response capability of the system.

[0024] The outlet of the drain pipe 5 is higher than the bottom surface of the lining 6 .

[0025] A sump 7 is provided on the bottom surface of the lining 6 , and the outlet of the drainage pipe 5 corresponds to the position of the sump 7 , so that the water flow is guided to the sump 7 , thereby facilitating the smooth discharge of the water flow.

[0026] The inner walls of the gate valve 3 and the check valve 8 are coated with an anti-corrosion coating to improve their durability and anti-corrosion ability, and are suitable for environments that are in a humid state for a long time and may contain corrosive liquids.

[0027] The outlet of the drain pipe 5 is at least 5 cm higher than the bottom plate of the lining 6.

[0028] The outlet direction of the check valve 8 is vertically upward.

[0029] The double-hole concentrated water outlet check valve structure for draining ultra-large flow and high-permeability water of the present invention is arranged in an ultra-large flow and high-permeability water area, and several groups can be arranged along the length direction of the tunnel.

[0030] The construction steps of a double-hole centralized water outlet check valve structure for draining ultra-large flow high-permeability water of the present invention are as follows: The construction method of the check valve includes the following steps: first, install several water diversion steel pipes 1 in the tunnel surrounding rock with ultra-large flow and high permeability water area and respectively set membrane bags 2 as water outlets; then install the gate valve 3 and connect it with the seamless steel pipe 4 with a lock nut; the seamless steel pipe 4 is connected with the drainage pipe 5; the check valve 8 is installed at the outlet of the drainage pipe 5; finally, ensure that the vertical outlet of the check valve 8 is higher than the concrete surface of the bottom plate; after the construction is completed, conduct a comprehensive inspection to ensure the normal operation of the system.

[0031] A construction method of a double-hole centralized water outlet check valve structure for draining ultra-large flow and high-permeability water comprises the following steps: 1. Geological survey and location selection: First, conduct a detailed geological survey to determine the geological structure of the tunnel, especially the hydrogeological conditions. According to the survey results, select several groups of optimal groundwater diversion and drainage points in the tunnel surrounding rock with ultra-large flow and high permeability water. Each group has two groundwater diversion and drainage points to ensure that the two groundwater diversion and drainage points can effectively disperse the groundwater flow and reduce the impact on the tunnel structure. Set a water collection pit on the tunnel floor 7; 2. Material preparation: prepare several water diversion steel pipes 1, membrane bags 2, gate valves 3, seamless steel pipes 4, diversion and drainage pipes 5 and check valves 8. All materials must meet engineering standards, especially strict requirements on corrosion resistance and pressure resistance; 3. Install the water diversion steel pipe and membrane bag: Drill a large diameter hole at the predetermined groundwater diversion and drainage point, vertically install the water diversion steel pipe 1 in the hole, cover the outside of the water diversion steel pipe 1 with the membrane bag 2, and fix the membrane bag 2 and the water diversion steel pipe 1 with a sealing tie to ensure sealing and stability; 4. Connect the gate valve: Install the gate valve 3 at the end of each membrane bag 2. The selection and installation of the gate valve 3 must ensure its operational reliability and sealing performance under ultra-high water pressure; 5. Arrange seamless steel pipe and lock nut: Connect gate valve 3 to seamless steel pipe 4 through lock nut to ensure no leakage or falling off under high pressure environment; 6. Install the drainage pipe and check valve: The other end of the seamless steel pipe 4 is connected to the drainage pipe 5, and a check valve 8 is installed at the outlet end of the drainage pipe 5. The outlet of the check valve 8 is designed to be vertically upward and correspond to the position of the sump 7.

[0032] Testing and debugging after installation Pressure test: After all installations are completed, pressure test the system to check the response and stability of the system under different water pressure conditions. Check all connection points and valves for leaks to ensure that the system's sealing and pressure resistance meet the design requirements.

[0033] Functional test: Test the closing and opening functions of the check valve 9 to ensure that it can respond quickly in actual operation. At the same time, test the manual operation mechanism to confirm that the check valve can be manually controlled in an emergency.

[0034] Actual water diversion test: Conduct actual water diversion test under safe conditions to observe whether the water can flow to the sump according to the designed route and check the water diversion efficiency and stability of the entire system.

[0035] Regular inspection: Regularly inspect key components such as the check valve 9, gate valve 3, and drain pipe 5, and replace worn or damaged components in a timely manner.

[0036] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the double-hole centralized water outlet check valve structure of the present invention for draining ultra-large flow high-permeability water, and can produce the positive effects recorded in the present invention.

[0037] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internally connected between two mechanisms, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the mechanism or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The terms "first" and "second" are also used only for simplicity of description, and do not indicate or imply relative importance.

[0039] Furthermore, in practicing the claims of the present invention, those skilled in the art can understand and effect variations to the disclosed embodiments by studying the drawings, the disclosure and the appended claims. In addition, in the claims and the specification, the words "comprise", "contain" and the like do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A double-hole centralized water outlet check valve structure for draining ultra-large flow high-permeability water, characterized in that: The invention comprises a plurality of water diversion steel pipes (1) arranged below the side of a lining (6), a seamless steel pipe (4), and a drainage pipe (5). One end of the water diversion steel pipe (1) is located in the surrounding rock of the seepage area outside the lining (6), and the other end of the water diversion steel pipe (1) extends into the lining (6). The drainage pipe (5) is located at the bottom of the lining (6). The two ends of the seamless steel pipe (4) are respectively connected to the water diversion steel pipe (1) and the drainage pipe (5). The outside of each water diversion steel pipe (1) is respectively provided with a membrane bag (2). A gate valve (3) is respectively provided on the side of each membrane bag (2) close to the seamless steel pipe (4). A check valve (8) is provided at the water outlet of the drainage pipe (5).

2. A double-hole concentrated water outlet check valve structure for draining ultra-large flow high-permeability water as claimed in claim 1, characterized in that: The outlet of the drainage pipe (5) is higher than the bottom surface of the lining (6).

3. A double-hole concentrated water outlet check valve structure for draining ultra-large flow high-permeability water as claimed in claim 1, characterized in that: A water collection pit (7) is provided on the bottom surface of the lining (6), and the outlet of the drainage pipe (5) corresponds to the position of the water collection pit (7).

4. A double-hole concentrated water outlet check valve structure for draining ultra-large flow high-permeability water as claimed in claim 1, characterized in that: The inner walls of the gate valve (3) and the check valve (8) are coated with an anti-corrosion coating.

5. A double-hole concentrated water outlet check valve structure for draining ultra-large flow high-permeability water as claimed in claim 1, characterized in that: The outlet of the drainage pipe (5) is at least 5 cm higher than the bottom plate of the lining (6).

6. A double-hole concentrated water outlet check valve structure for draining ultra-large flow high-permeability water as claimed in claim 1, characterized in that: The outlet direction of the check valve (8) is vertically upward.

7. A construction method for a double-hole centralized water outlet check valve structure for draining ultra-large flow and high-permeability water, characterized in that: The following steps are involved:

1. Geological survey and location selection: First, conduct a detailed geological survey to determine the geological structure of the tunnel, especially the hydrogeological conditions. According to the survey results, select several groups of optimal groundwater diversion and drainage points in the tunnel surrounding rock with extremely large flow and high permeability water. Each group has two groundwater diversion and drainage points to ensure that the two groundwater diversion and drainage points can effectively disperse the groundwater flow and reduce the impact on the tunnel structure. Set a water collection pit on the tunnel floor (7); 2. Material preparation: prepare a number of water diversion steel pipes (1), membrane bags (2), gate valves (3), seamless steel pipes (4), diversion and discharge pipes (5) and check valves (8); 3. Install the water diversion steel pipe and the membrane bag: Drill a large diameter hole at the predetermined groundwater diversion and drainage point, vertically install the water diversion steel pipe (1) in the hole, cover the outside of the water diversion steel pipe (1) with the membrane bag (2), and fix the membrane bag (2) and the water diversion steel pipe (1) with a sealing tie to ensure sealing and stability; 4. Connecting the gate valve: Install a gate valve (3) at the end of each membrane bag (2); 5. Arrange the seamless steel pipe and lock nut: connect the gate valve (3) to the seamless steel pipe (4) through the lock nut; 6. Install the drainage pipe and check valve: The other end of the seamless steel pipe (4) is connected to the drainage pipe (5). A check valve (8) is installed at the outlet of the drainage pipe (5). The outlet of the check valve (8) is designed to be vertically upward and correspond to the position of the sump (7).

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