Sub-membrane exhaust and drainage device and method

Abstract

The present application discloses a sub-membrane exhaust and drainage device and method, belonging to the field of water and gas treatment devices. A sub-membrane exhaust and drainage device for a geomembrane anti-seepage system includes: an adjustment tank, a well body, a drainage ditch, and a geomembrane. The geomembrane covers the adjustment tank, the drainage ditch, and the well body; the bottom of the adjustment tank is arranged in a symmetric slope from two side walls to the center direction; a well body is arranged at the bottom position of the pool near the side wall; the geomembrane extends from the top opening of the well body to the inner wall of the well body to form an inner wall membrane, and the inner wall membrane is provided with an exhaust structure; a drainage ditch is opened at the bottom of the adjustment tank, and the drainage ditch includes a first drainage ditch and a second drainage ditch. The first drainage ditch is inclined, and the inclination direction of the first drainage ditch is opposite to the inclination direction of the pool bottom. The first drainage ditch is communicated with the well body. The present application can effectively solve the problem of poor drainage and exhaust caused by groundwater seepage and gas remaining under the geomembrane, and further eliminate the risk of rupture and damage of the geomembrane caused by gas expansion.

Description

Technical Field

[0001] This application belongs to the technical field of water and gas treatment devices, and particularly relates to a sub-membrane exhaust and drainage device and method. Background Art

[0002] In recent years, geomembrane (geotextile) covering has been widely used in the environmental remediation anti-seepage system and has gradually become a relatively common and effective remediation means in the actual construction process. The horizontal anti-seepage of geomembrane is widely used in the anti-seepage treatment of various scenarios because of its strong adaptability to topographic and geological conditions, convenient construction, and simple process. Although geomembrane, as a large-area soft one or more geosynthetics, its low permeability characteristics are often used as the anti-seepage lining of liquid or gas reservoirs; however, due to the influence of various factors, there may still be gas swelling under the membrane and new leakage problems may be caused.

[0003] For example, after the geomembrane covering is completed, a series of problems may follow. The biggest hidden danger is that due to the laying process or the rising of the groundwater level under the geomembrane, groundwater may seep out, which is very likely to cause gas and water accumulation under the membrane. Over time, it will cause gas swelling of the geomembrane and then rupture and damage.

[0004] In related technologies, for the seepage water under the geomembrane, a drainage ditch formed by gravel and block stones with a certain width and thickness is often set under the geomembrane, or a drainage blind pipe is set for drainage. However, the existing drainage structures cannot quickly and effectively drain the seepage water, nor can they effectively discharge the stored gas. Therefore, the existing technologies are not perfect enough and need to be further improved. Summary of the Invention

[0005] In view of the above problems, the present invention aims to solve at least one of the technical problems in the related technologies to some extent. For this purpose, the present invention provides a sub-membrane exhaust and drainage device and method, which can alleviate the problem of poor drainage and exhaust caused by groundwater seepage and gas retention under the geomembrane, can effectively reduce or avoid the risk of rupture and damage of the geomembrane due to gas swelling, and can overcome the deficiencies in the existing technologies.

[0006] To solve the above technical problems, the present application is implemented as follows:

[0007] According to one aspect of the present application, an embodiment of the present application provides a sub-membrane exhaust and drainage device for a geomembrane anti-seepage system. The sub-membrane exhaust and drainage device includes: a regulating pond, a well body, a drainage ditch, and a geomembrane, and the geomembrane covers the regulating pond, the drainage ditch, and the well body;

[0008] The regulating tank includes a tank bottom and two side walls arranged opposite to each other. The tank bottom is symmetrically sloped from the two side walls towards the center direction, and the tank bottom has a slope that slopes downward from the side walls to the center of the tank bottom;

[0009] The well body is provided at the position of the tank bottom near at least one of the two side walls. Part of the well body extends downward to the lower part of the tank bottom, and the other part of the well body extends above the tank bottom;

[0010] The top of the well body is open. The geomembrane covers the outer wall of the well body, and the geomembrane extends from the open mouth to the inner wall of the well body to form an inner wall membrane. The inner wall membrane is provided with an exhaust structure for discharging the gas under the membrane;

[0011] The tank bottom of the regulating tank is provided with the drainage ditch. The drainage ditch includes a first drainage ditch and a second drainage ditch. The first drainage ditch and the second drainage ditch are arranged perpendicular to each other and intersect. The first drainage ditch is inclined, and the inclination direction of the first drainage ditch is opposite to the inclination direction of the tank bottom. The first drainage ditch is communicated with the well body for discharging the water under the membrane.

[0012] In some embodiments, the first drainage ditch has a slope that slopes from the center of the tank bottom to the side wall direction, and the inclination slope of the first drainage ditch is less than the inclination slope of the tank bottom.

[0013] In some embodiments, the inclination slope of the tank bottom is 0.4%-0.6%; and / or, the inclination slope of the first drainage ditch is 0.1%-0.2%.

[0014] In some embodiments, the exhaust structure includes exhaust holes opened on the inner wall membrane, and the distance between the exhaust holes and the open mouth of the well body is 4 cm - 6 cm.

[0015] In some embodiments, a water discharge port is opened on the side wall of the well body for communicating with the first drainage ditch; and / or, a drainage mechanism is arranged in the well body.

[0016] In some embodiments, a filter screen is installed at the water discharge port; and / or, the diameter of the water discharge port is 20 cm - 40 cm, and the distance between the lower end of the water discharge port and the bottom end of the first drainage ditch is 5 cm - 15 cm.

[0017] In some of these embodiments, the drainage mechanism includes a drainage pump disposed on the inner wall of the well body, and a first water suction pipe and a second water suction pipe connected to the drainage pump; the first water suction pipe extends towards the bottom end of the well body, and the distance between the bottom end of the first water suction pipe and the bottom of the well body is 10 cm - 30 cm; the second water suction pipe extends towards the open end of the well body and extends out of the well body from the side wall of the well body, and the distance between the top end of the second water suction pipe and the open end of the well body is 40 cm - 60 cm.

[0018] In some of these embodiments, there is one first drainage ditch, and both ends of the first drainage ditch are respectively communicated with the well bodies on both sides; there are two second drainage ditches, and the two second drainage ditches are equidistantly distributed at intervals between the center of the pool bottom and the well bodies, and the two second drainage ditches are respectively perpendicular to and intersect with the first drainage ditch.

[0019] In some of these embodiments, drainage and silt prevention plates are respectively laid on both sides of the first drainage ditch, and granular materials are arranged inside the first drainage ditch; and / or, granular materials are arranged both inside and on the upper two sides of the first drainage ditch, drainage and silt prevention plates are laid on the granular materials on the upper two sides of the first drainage ditch, and the geomembrane covers the drainage and silt prevention plates.

[0020] According to another aspect of the present application, an under-membrane exhaust and drainage method is provided by embodiments of the present application. The method includes:

[0021] Providing a regulating pond, the regulating pond includes a pond bottom and two opposite side walls, the pond bottom is arranged in a symmetric slope from the two side walls towards the center direction, and the pond bottom has a slope that slopes downward from the side walls to the center of the pond bottom;

[0022] Well bodies are arranged at the pond bottom positions near at least one of the two side walls, a part of the well bodies extends downward to the lower part of the pond bottom, and another part of the well bodies extends above the pond bottom;

[0023] A drainage ditch is opened on the pond bottom of the regulating pond, the drainage ditch includes a first drainage ditch and a second drainage ditch, the first drainage ditch and the second drainage ditch are arranged perpendicular to and intersect with each other, the first drainage ditch is inclined, and the inclination direction of the first drainage ditch is opposite to the inclination direction of the pond bottom, and the first drainage ditch is communicated with the well body;

[0024] The regulating pond, the drainage ditch and the well body are all covered with a geomembrane;

[0025] The top of the well body is open, and the geomembrane extends from the opening to the inner wall of the well body to form an inner wall membrane. The inner wall membrane is provided with an exhaust structure, and the gas under the membrane is discharged by adjusting the bottom slope of the regulating pond, the well body and the exhaust structure; the water under the membrane is discharged through the second drainage ditch, the first drainage ditch and the well body in sequence by making the inclination direction of the first drainage ditch opposite to that of the bottom of the pond.

[0026] Implementing the technical solution of the present invention has at least the following beneficial effects: In the embodiment of the present application, the provided device for exhausting gas and draining water under the membrane can be applied to the geomembrane anti-seepage system. In this device for exhausting gas and draining water under the membrane, the bottom of the regulating pond is provided with symmetric slopes, and the bottom of the pond has a slope that slopes downward from the side wall to the center of the bottom of the pond, that is, the center of the bottom of the pond can be used as the lowest point; at the position of the bottom of the pond close to the side wall, that is, at the high position of the bottom of the pond, a well body is provided; a drainage ditch is also opened at the bottom of the pond, and the first drainage ditch among them is communicated with the well body, and the first drainage ditch has a slope opposite to the inclination direction of the bottom of the pond. In this way, through the setting of the well body and by using the different settings of the bottom slope of the pond and the slope of the first drainage ditch, the gas and water under the membrane can be exhausted and drained, which not only solves the problem of draining water under the membrane, but also helps to realize the recycling of water resources.

[0027] Therefore, the device for exhausting gas and draining water under the membrane of the present application can effectively solve the problem of poor drainage and gas exhaust caused by groundwater seepage and the gas remaining under the geomembrane, further eliminate the risk of the geomembrane bursting and being damaged due to gas expansion, and can also break the problem that only one of the traditional single gas exhaust or water drainage can be selected.

[0028] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a device for exhausting gas and draining water under the membrane provided by some embodiments of the present invention;

[0030] Figure 2 is Figure 1 the sectional view taken along the line a-a in

[0031] Figure 3 is Figure 2 the sectional view taken along the line b-b in

[0032] Figure 4 is a schematic structural diagram of a regulating pond in a device for exhausting gas and draining water under the membrane provided by some embodiments of the present invention.

[0033] Description of the reference numerals:

[0034] 10 - regulating pond; 101 - bottom of the pond; 111 - center of the bottom of the pond; 102 - side wall;

[0035] 20 - Well body; 201 - Drainage outlet; 202 - Filter screen;

[0036] 30 - Drainage ditch; 301 - First drainage ditch; 302 - Second drainage ditch; 311 - Drainage anti - siltation plate; 312 - Aggregate;

[0037] 40 - Geomembrane; 401 - Inner wall membrane; 402 - Vent hole.

[0038] 50 - Drainage mechanism; 501 - Drainage pump; 502 - First suction pipe; 503 - Second suction pipe. Detailed implementation mode

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0040] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values and individual point values of each range, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges.

[0041] It should be noted that the term "and / or" or " / " used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0042] Next, the embodiments of the present application will be described in detail in conjunction with the accompanying drawings through specific embodiments and their application scenarios.

[0043] Geomembranes have been widely used in the field of environmental restoration and anti-seepage projects such as earth-rock dams, dikes, and carbide slag due to their good anti-seepage performance, strong adaptability to deformation, low project cost, and fast construction speed. Exemplarily, there are large-scale carbide slag mountains in some regions or enterprises, which not only occupy valuable land resources but also pollute the soil and shallow groundwater. Although the phenomenon of dust can be controlled by covering the surface of the carbide slag pile with non-woven geotextiles, due to the unorganized runoff collection on the slag mountain caused by rainfall over the years, there are sewage ditches around the slag mountain. Over the years, some of the sewage has seeped underground, and the quality of the leaching water exceeds the alkaline standard, causing a certain degree of pollution to the shallow groundwater and soil, and destroying the balance of the ecological hydrological environment system. In order to avoid pollution, anti-seepage and anti-loss measures need to be taken to ensure that the water quality meets the standards and restore a good ecological environment for the landform. Based on this, the inventors of the present application used a double-seam hot melt welding laying process for geomembranes (such as HDPE geomembranes made of high-density polyethylene) to weld and cover the exposed carbide slag on-site. Since HDPE geomembranes have strong weather resistance and anti-aging performance, they can be exposed for a long time and maintain their original performance. At the same time, they have good chemical stability, high rigidity and toughness, good mechanical strength, and good resistance to environmental stress cracking and tear strength performance. In addition, as the density increases, the mechanical properties and barrier properties will increase accordingly, and the heat resistance and tensile strength will also be higher. They can resist corrosion by acids, alkalis, organic solvents, etc., and are a better choice as anti-seepage and environmental protection materials. On this basis, the inventors of the present application also built facilities such as a total regulation pool in the relevant site to achieve stepped water storage and diversion, block the direct contact between rainwater and the carbide slag pile body, and at the same time configure a pH on-line monitoring system and a dosing pool to achieve real-time monitoring of rainwater, treatment of excessive water quality, and prevention of damage to the anti-seepage membrane. However, the problem is that during the process of laying and welding HDPE geomembranes, gas will remain under the membrane, and with the seepage of groundwater, it is very likely that water will accumulate under the membrane, posing a safety hazard to the quality of the covered membrane during the maintenance and quality assurance period after acceptance.

[0044] In view of this, in order to solve the problem of poor drainage and exhaust caused by groundwater seepage and gas retention under the geomembrane, and reduce or avoid the risk of rupture and damage of the geomembrane caused by gas expansion, the present application proposes a new device and process technology for gas collection, exhaust and drainage under the anti-seepage covering geomembrane. The description of the specific technical solution is as follows.

[0045] Please refer to Figures 1 to 4 As shown in the figure, in some embodiments of the present application, a gas exhaust and drainage device under the membrane is provided for the geomembrane anti-seepage system. The gas exhaust and drainage device under the membrane includes: a regulation pool 10, a well body 20, a drainage ditch 30, and a geomembrane 40. The geomembrane 40 covers the regulation pool 10, the drainage ditch 30, and the well body 20. The geomembrane 40 therein can adopt an HPDE geomembrane.

[0046] The sub-membrane exhaust and drainage device provided in this embodiment can be applied in the field of geosynthetic membrane environmental remediation and anti-seepage systems. For example, it can be applied in the carbide slag pollution control project as described above. Of course, it can also be applied in other fields, and this embodiment does not limit this.

[0047] Specifically, in the provided sub-membrane exhaust and drainage device, the regulating tank 10 includes a tank bottom 101 and two side walls 102 arranged oppositely. The tank bottom 101 is arranged in a symmetric slope from the two side walls 102 to the center direction, and the tank bottom 101 has a slope that slopes downward from the side walls 102 to the center 111 of the tank bottom.

[0048] The above-mentioned regulating tank 10 can generally be a square regulating tank 10, which includes a tank bottom 101 and a plurality of side walls 102 arranged around the tank bottom 101. For example, two oppositely arranged side walls 102 are respectively provided on the left and right sides of the tank bottom 101 of the regulating tank 10, and two oppositely arranged side walls are also respectively provided on the front and back sides of the regulating tank 10. In the following of this embodiment, mainly the two side walls provided on the left and right sides of the regulating tank 10 will be described. Specifically, the two side walls 102 provided on the left and right sides of the tank bottom 101 of the regulating tank 10 can be respectively the first side wall and the second side wall. The tank bottom 101 of this regulating tank 10 is a tank bottom with a slope and symmetrically arranged. The tank bottom 101 has a slope that slopes along the direction from the first side wall to the center 111 of the tank bottom, and has a slope that slopes along the direction from the second side wall to the center 111 of the tank bottom.

[0049] In this embodiment, it is set that the center position of the regulating tank 10 at the project site is the lowest point of the elevation. On the left and right sides of the tank bottom 101, gentle slopes are respectively provided towards the center point of the tank bottom, so that the tank bottom 101 is symmetrically inclined from the two side walls 102 to the center direction, and the center 111 of the tank bottom can be used as the lowest point, and the position of the tank bottom 101 close to the side wall 102 is the high point.

[0050] In addition, in other embodiments, the regulating tank 10 can also adopt other shape structures, and this embodiment does not limit this.

[0051] The structure of this regulating tank 10 is symmetric, and the structures on both sides can be the same. In the following, mainly one side of the regulating tank 10, such as the left side or the right side, will be taken as an example for detailed description.

[0052] In this embodiment, a well body 20 is provided at the bottom 101 of the pool near at least one of the two side walls 102. For example, a well body 20 can be provided at the bottom 101 near the first side wall, and a well body 20 can be provided at the bottom 101 near the second side wall. That is, a well body 20 can be respectively provided at the high points on both sides of the bottom 101 of the pool, and the well body 20 can be located in the middle of the front and back sides. Alternatively, in other embodiments, a well body 20 can also be provided at the bottom 101 near the first side wall or the second side wall. Among them, part of the well body 20 extends downward from the bottom 101 of the pool, and the other part of the well body 20 extends above the bottom 101 of the pool. It should be understood that the structures of the two well bodies on the left and right sides can be the same or similar. Hereinafter, one of the well bodies will be mainly taken as an example for detailed description.

[0053] Optionally, the well body 20 is a hollow well body, and the well body 20 can be a cement hollow well, which can function as a pumping well.

[0054] Optionally, the inner diameter of the well body 20 can be 0.8 m - 1.6 m, and the height can be 4 m - 5 m. Exemplarily, the inner diameter of the well body 20 can be 1 m, and the height can be 4.5 m. In addition, in other embodiments, the inner diameter and height of the well body 20 can also be selected and set according to different actual situations.

[0055] Optionally, the bottom of the well body 20 is about 1 m below the bottom of the adjustment pool 10. Optionally, a ladder can be provided inside the well body 20 to facilitate the operation personnel to get in and out.

[0056] In this embodiment, the top of the well body 20 is open, the geomembrane 40 covers the outer wall of the well body 20, and the geomembrane 40 extends from the open end to the inner wall of the well body 20 to form an inner wall membrane 401. The inner wall membrane 401 is provided with an exhaust structure for discharging the gas under the membrane. Optionally, a manhole cover can also be provided at the open end of the well body 20.

[0057] The above-mentioned HPDE geomembrane can completely cover the adjustment pool 10, and the outer wall of the well body 20 can be completely covered with the HPDE geomembrane and connected to the bottom 101 of the adjustment pool 10. A small amount of surplus can be left for the geomembrane 40 above the well body 20 and rolled up to the inner wall of the well body 20 for fixation. That is, the geomembrane 40 can extend from the open end of the well body 20 to the inner wall of the well body 20 to form an inner wall membrane 401, and the geomembrane 40 can be fixedly connected to the inner wall of the well body 20. The exhaust structure provided on the inner wall membrane 401 can discharge the gas under the membrane.

[0058] In this embodiment, a drainage ditch 30 is formed at the bottom 101 of the regulating pond 10. The drainage ditch 30 includes a first drainage ditch 301 and a second drainage ditch 302. The first drainage ditch 301 and the second drainage ditch 302 are arranged vertically and intersectingly. The first drainage ditch 301 is inclined, and the inclination direction of the first drainage ditch 301 is opposite to the inclination direction of the bottom 101 of the pond. The first drainage ditch 301 is communicated with the well body 20 for discharging the water under the membrane.

[0059] The above-mentioned first drainage ditch 301 can be arranged along the left-right direction, and the second drainage ditch 302 can be arranged along the front-back direction. Both ends of the first drainage ditch 301 can be respectively communicated with the well bodies 20 on the left and right sides, and the second drainage ditch 302 is communicated with the first drainage ditch 301. The inclination direction of the first drainage ditch 301 is opposite to the inclination direction of the bottom 101 of the pond. That is to say, the first drainage ditch 301 can be inclined gradually from the center 111 of the bottom of the pond towards the side wall 102, and the slope direction of the first drainage ditch 301 is opposite to that of the bottom 101 of the pond. The second drainage ditch 302 can be used to collect the accumulated water, then the accumulated water flows into the first drainage ditch 301, and then the accumulated water flows into the well body 20, so as to realize the discharge of the water under the membrane.

[0060] Therefore, based on the above settings, the device for exhausting and draining water under the membrane provided in this embodiment can effectively solve the problem of poor drainage and exhaust caused by the seepage of groundwater and the retention of gas under the geomembrane, further eliminate the risk of rupture and damage of the geomembrane caused by gas expansion, and can also break the traditional problem that only one of the single exhaust or drainage can be selected. Specifically, the bottom 101 of the regulating pond 10 of the device for exhausting and draining water under the membrane is provided with symmetric slopes, and the center 111 of the bottom of the pond can be used as the lowest point, and the position of the bottom 101 close to the side wall 102 can be used as the high point. By using the fact that the slope of the bottom 101 of the pond is opposite to the slope of the bottom of the first drainage ditch 301, both exhaust and drainage under the membrane can be realized. Since the slope of the bottom 101 of the pond slopes downward from the side wall 102 to the center 111 of the bottom of the pond, that is, the slope of the bottom 101 of the pond gradually increases towards the direction of the well body 20, the gas under the membrane can gradually flow along the bottom 101 of the pond towards the well body 20 and can be discharged through the exhaust structure on the inner wall membrane 401. The accumulated water under the membrane can be collected by the second drainage ditch 302 in the front-back direction into the first drainage ditch 301 (main drainage ditch) in the left-right direction, and by using the different settings of the slope of the bottom 101 of the pond and the slope of the first drainage ditch 301, the accumulated water can flow into the well body 20, and the accumulated water can be discharged. Thus, both exhaust and drainage under the membrane are realized, which not only solves the problem of drainage under the membrane, but also helps to realize the recycling of water resources.

[0061] In addition, in some preferred embodiments of the present invention, the first drainage ditch 301 is filled with granular material 312; in this way, when the accumulated water converges into the first drainage ditch 301 through the second drainage ditch 302, the filled granular material 312 can effectively prevent the problem of poor water flow caused by silt blockage. Further, in some preferred embodiments of the present invention, a drainage mechanism 50 is provided in the well body 20; in this way, when the accumulated water in the first drainage ditch 301 flows into the well through the drain opening 201, when the accumulated water in the well reaches a certain height, the drainage mechanism 50 (such as an automatic drainage pump) will pump the accumulated water in the well through the drain pipe along the well wall outlet to the adjustment pool 10 according to the liquid level height, which not only solves the problem of sub-membrane drainage but also realizes the recycling of water resources.

[0062] In some embodiments, the first drainage ditch 301 has a slope that slopes from the center of the pool bottom 111 towards the side wall 102, and the slope of the first drainage ditch 301 is less than the slope of the pool bottom 101.

[0063] The above-mentioned first drainage ditch 301 has a slope opposite to the slope direction of the pool bottom 101, and the slope of the first drainage ditch 301 is less than the slope of the pool bottom 101. In this way, it helps the accumulated water to flow from the first drainage ditch 301 to the well body 20, and helps the stored gas to flow along the pool bottom 101 to the well body 20 and be discharged through the exhaust structure on the inner wall membrane 401. Thus, by utilizing the difference in the slope of the pool bottom 101 and the slope of the first drainage ditch 301, especially the slope of the first drainage ditch 301 being less than the slope of the pool bottom 101, the requirements of both drainage and gas exhaust under the geomembrane can be achieved.

[0064] Optionally, the pool bottom 101 slopes downward from the side wall 102 to the center of the pool bottom 111, and the slope of the pool bottom 101 is 0.4% - 0.6%. Exemplarily, the slope of the pool bottom 101 can be 0.4%, 0.5%, 0.6%, etc., and preferably 0.5%

[0065] Optionally, the first drainage ditch 301 slopes upward from the side wall 102 to the center of the pool bottom 111, and the slope of the first drainage ditch 301 is 0.1% - 0.2%. Exemplarily, the slope of the first drainage ditch 301 can be 0.1%, 0.15%, 0.2%, etc., and preferably 0.1%.

[0066] The slope of the above-mentioned pool bottom or the slope of the first drainage ditch 301 should not be too large or too small to avoid affecting the gas exhaust or drainage effect, or affecting the anti-seepage covering effect of the geomembrane.

[0067] In some embodiments, the exhaust structure includes exhaust holes 402 opened on the inner wall membrane 401, and the distance between the exhaust holes 402 and the open mouth of the well body 20 is 4 cm - 6 cm.

[0068] An exhaust structure is formed by opening holes in the inner wall membrane 401 to form exhaust holes 402. The structure is simple, convenient for processing, and also beneficial to gas discharge. Optionally, the distance between the exhaust hole 402 and the open end (the top of the well body) of the well body 20 is 4 cm - 6 cm. Exemplarily, this distance can be 4 cm, 4.5 cm, 5 cm, 5.5 cm, 6 cm, etc., and preferably 5 cm. Within this distance range, it is more conducive to exhaust and can improve the exhaust efficiency.

[0069] In addition, other types of exhaust structures can also be adopted. The specific structure or type of the exhaust structure in this embodiment is not limited. Other structural methods are also known to those skilled in the art and will not be elaborated here. Additionally, in other embodiments, the distance between the exhaust hole 402 and the open end of the well body 20 can also be adjusted according to actual situations.

[0070] In some embodiments, there is one first drainage ditch 301, and both ends of the first drainage ditch 301 are respectively connected to the well bodies 20 on both sides; there are two second drainage ditches 302, and the two second drainage ditches 302 are equidistantly distributed at intervals between the center 111 of the pool bottom and the well bodies 20, and the two second drainage ditches 302 are respectively perpendicular to and intersect with the first drainage ditch 301.

[0071] Optionally, the width of the above-mentioned first drainage ditch 301 can be about 50 cm. Optionally, the above-mentioned second drainage ditches 302 can be two drainage ditches of 50 * 50 cm.

[0072] The above two second drainage ditches 302 can be equidistantly distributed between the center 111 of the pool bottom and the well bodies 20, which can be used to better collect the water accumulated under the membrane. The above two second drainage ditches 302 in the front - rear direction are connected to one first drainage ditch 301 in the left - right direction.

[0073] In some embodiments, drainage and silt - prevention plates 311 are respectively laid on both sides of the first drainage ditch 301, and granular materials 312 are arranged inside the first drainage ditch 301. Or, granular materials 312 are arranged inside and on both upper sides of the first drainage ditch 301, and drainage and silt - prevention plates 311 are laid on the granular materials 312 on both upper sides of the first drainage ditch 301, and the geomembrane 40 covers the drainage and silt - prevention plates 311.

[0074] By laying drainage and silt - prevention plates 311 on both sides of the above - mentioned first drainage ditch 301, it can be used to separate from the silt in the external project soil, and the ditch of the first drainage ditch 301 is filled with granular materials 312, which is convenient for the smooth flow of the water accumulated in the ditch and will not be blocked by silt. Further, the first drainage ditch 301 can also be filled with granular materials 312 above, and drainage and silt - prevention plates 311 are laid on the granular materials 312, and a film is covered on the drainage and silt - prevention plates 311.

[0075] In this way, by filling the first drainage ditch 301 with granular material 312, the problem of poor circulation caused by silt blockage during the drainage process can be effectively solved. Moreover, the drainage and silt prevention plate 311 can serve as a practical permeable material, effectively collecting the seepage water into the first drainage ditch 301.

[0076] In some embodiments, a drain outlet 201 is provided on the side wall of the well body 20 for communicating with the first drainage ditch 301.

[0077] To achieve the connection between the well body 20 and the first drainage ditch 301, a drain outlet 201 needs to be provided on the side wall of the well body 20 to enable water to flow from the first drainage ditch 301 into the well body 20.

[0078] Optionally, a filter screen 202 is installed at the drain outlet 201. In this way, it can prevent the granular material 312 from falling into the well body 20 and can effectively intercept other impurities.

[0079] Optionally, the diameter of the drain outlet 201 is 20 cm - 40 cm. Exemplarily, the diameter of the drain outlet 201 can be 20 cm, 30 cm, 40 cm, etc., preferably 30 cm. The diameter of the drain outlet 201 should not be too large or too small to avoid affecting the water flow rate or the drainage effect.

[0080] Optionally, the distance between the lower end of the drain outlet 201 and the bottom end of the first drainage ditch 301 is 5 cm - 15 cm. Exemplarily, the distance between the lower end of the drain outlet 201 and the bottom end of the first drainage ditch 301 can be 5 cm, 6 cm, 8 cm, 10 cm, 12 cm, 15 cm, etc., preferably 10 cm. In this embodiment, by leaving a margin of about 10 cm below the drain outlet 201 on the well wall, the drain outlet 201 can be effectively prevented from being blocked by silt.

[0081] Thus, by providing a drain outlet 201 of about 30 cm on the inner wall below the bottom 101 of the well body 20, leaving a margin of about 10 cm below, and communicating with the first drainage ditch 301, and installing a filter screen 202 at the drain outlet 201, it can prevent the granular material from falling into the well body and can also effectively prevent the drain outlet 201 from being blocked by silt.

[0082] In some embodiments, a drainage mechanism 50 is provided in the well body 20. By providing the drainage mechanism 50 in the well body 20, the accumulated water in the well body 20 can be drained out through the drainage mechanism 50. Optionally, the drainage mechanism 50 can adopt an automatic drainage mechanism, which can drain water automatically according to the liquid level.

[0083] Optionally, the drainage mechanism 50 includes a drainage pump 501 disposed on the inner wall of the well body 20, and a first water suction pipe 502 and a second water suction pipe 503 connected to the drainage pump 501; the first water suction pipe 502 extends towards the bottom end of the well body 20, and the second water suction pipe 503 extends towards the top end of the well body 20 and extends out of the well body 20 through the side wall of the well body 20.

[0084] The above-mentioned drainage pump 501 can adopt an automatic drainage pump. The automatic drainage mechanism 50 can drain water automatically according to the liquid level. For the structure and working principle of the automatic drainage pump, reference can be made to the prior art, and this embodiment does not limit it.

[0085] Both ends of the drainage pump 501 can be respectively connected to the first water suction pipe 502 and the second water suction pipe 503. The first drainage pipe and the second drainage pipe can adopt PPR water suction pipes; for example, the first end of the drainage pump 501 extends towards the bottom end of the well body 20 through the first water suction pipe 502, and the second end of the drainage pump 501 extends towards the top end of the well body 20, that is, the open direction, through the second water suction pipe 503, and the second water suction pipe 503 is bent to extend out of the well body 20 through the side wall of the well body 20 to communicate with the outside. In this way, when the water accumulated under the film in the well body 20 gathers to a certain amount, the drainage pump 501 can be started, and the accumulated water is pumped into the regulation pool 10 through the drainage pump 501, the first water suction pipe 502 and the second water suction pipe 503.

[0086] Therefore, in this embodiment, an automatic drainage mechanism 50 is provided in the well body 20. The automatic drainage mechanism 50 in the well body 20 can automatically drain the water accumulated in the well body 20 back into the pool according to the water accumulation situation in the well body 20. All processes are completed in the well, avoiding the inconvenience of inserting a pipe for drainage due to the limitation of the manhole cover. Moreover, the automatic drainage mechanism 50 pumps the water accumulated in the well body 20 into the regulation pool 10 through the second water suction pipe 503 along the well wall outlet, which not only solves the problem of drainage under the film but also realizes the recycling of water resources.

[0087] Optionally, the distance between the bottom end of the first water suction pipe 502 and the bottom of the well body 20 is 10 cm - 30 cm. Exemplarily, the distance between the bottom end of the first water suction pipe 502 and the bottom of the well body 20 can be 10 cm, 15 cm, 20 cm, 25 cm, 30 cm, etc., and preferably 20 cm. In this way, it is more helpful to achieve smooth drainage and can improve the drainage effect and efficiency.

[0088] Optionally, the distance between the top end of the second water suction pipe 503 and the open end of the well body 20 is 40 cm - 60 cm. Exemplarily, the distance between the top end of the second water suction pipe 503 and the open end of the well body 20 can be 40 cm, 45 cm, 50 cm, 55 cm, 60 cm, etc., and preferably 60 cm. In this way, it is more helpful to achieve smooth drainage and can improve the drainage effect and efficiency.

[0089] In some embodiments, a method for exhausting air and draining water under a membrane is provided. The method includes:

[0090] Providing an adjustment tank 10, the adjustment tank 10 includes a tank bottom 101 and two side walls 102 arranged opposite to each other. The tank bottom 101 is arranged in a symmetric slope from the two side walls 102 to the center direction, and the tank bottom 101 has a slope that slopes downward from the side walls 102 to the center 111 of the tank bottom;

[0091] A well body 20 is arranged at the position of the tank bottom 101 near at least one of the two side walls 102. Part of the well body 20 extends downward to the lower part of the tank bottom 101, and the other part of the well body 20 extends out above the tank bottom 101;

[0092] A drainage ditch is opened on the tank bottom 101 of the adjustment tank 10. The drainage ditch includes a first drainage ditch 301 and a second drainage ditch 302. The first drainage ditch 301 and the second drainage ditch 302 are arranged vertically and intersectingly. The first drainage ditch 301 is arranged obliquely, and the inclination direction of the first drainage ditch 301 is opposite to the inclination direction of the tank bottom 101. The first drainage ditch 301 is communicated with the well body 20;

[0093] The adjustment tank 10, the drainage ditch and the well body 20 are all covered with a geomembrane 40;

[0094] The top of the well body 20 is open. The geomembrane 40 extends from the opening to the inner wall of the well body 20 to form an inner wall membrane 401. The inner wall membrane 401 is provided with an exhaust structure. By means of the slope of the tank bottom 101 of the adjustment tank 10, the well body 20 and the exhaust structure, the gas under the membrane is discharged; by means of the inclination direction of the first drainage ditch 301 being opposite to the inclination direction of the tank bottom 101, the water under the membrane is discharged through the second drainage ditch 302, the first drainage ditch 301 and the well body 20 in sequence.

[0095] It should be understood that this method for exhausting air and draining water under a membrane and the aforementioned device for exhausting air and draining water under a membrane are based on the same inventive concept. Regarding the device structure and its connection, etc., reference can be made to the description of the aforementioned device for exhausting air and draining water under a membrane, and this method for exhausting air and draining water under a membrane has at least all the features and advantages of the aforementioned device for exhausting air and draining water under a membrane, which will not be elaborated here.

[0096] Contents not described in detail in this specification belong to the prior art well-known to those skilled in the art.

[0097] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0098] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0099] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0100] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0101] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A membrane - under exhaust and drainage device for a geomembrane anti - seepage system, characterized in that, Including: A regulating pond, a well body, a drainage ditch, and a geomembrane, wherein the geomembrane covers the regulating pond, the drainage ditch, and the well body; The regulating pond includes a pond bottom and two opposite side walls. The pond bottom is arranged in a symmetric slope from the two side walls towards the center direction, and the pond bottom has a slope that slopes downward from the side walls to the center of the pond bottom; The well body is arranged at the position of the pond bottom near at least one of the two side walls. A part of the well body extends downward to the lower part of the pond bottom, and another part of the well body extends upward to protrude above the pond bottom; The top of the well body is open. The geomembrane covers the outer wall of the well body, and the geomembrane extends from the open mouth to the inner wall of the well body to form an inner wall membrane. The inner wall membrane is provided with an exhaust structure for discharging the gas under the membrane. The pond bottom of the regulating pond is provided with the drainage ditch. The drainage ditch includes a first drainage ditch and a second drainage ditch. The first drainage ditch and the second drainage ditch are arranged perpendicular to and intersect with each other. The first drainage ditch is inclined, and the inclination direction of the first drainage ditch is opposite to the inclination direction of the pond bottom. The first drainage ditch is communicated with the well body for discharging the water under the membrane; A water discharge port is arranged on the side wall of the well body for communicating with the first drainage ditch; a filter screen is installed at the water discharge port; the diameter of the water discharge port is 20 cm - 40 cm, and the distance between the lower end of the water discharge port and the bottom end of the first drainage ditch is 5 cm - 15 cm; A drainage mechanism is arranged in the well body; the drainage mechanism includes a drainage pump arranged on the inner wall of the well body, and a first suction pipe and a second suction pipe connected to the drainage pump; the first suction pipe extends towards the bottom end of the well body, and the distance between the bottom end of the first suction pipe and the bottom of the well body is 10 cm - 30 cm; the second suction pipe extends towards the open mouth of the well body and extends out of the well body from the side wall of the well body, and the distance between the top end of the second suction pipe and the open mouth of the well body is 40 cm - 60 cm.

2. The membrane-covered exhaust and drainage device according to claim 1, wherein The first drainage ditch has a slope that slopes from the center of the pond bottom towards the side wall direction, and the inclination slope of the first drainage ditch is less than the inclination slope of the pond bottom.

3. The under-film exhaust and drainage device according to claim 2, characterized in that, The inclination slope of the pond bottom is 0.4% - 0.6%; And / or, the inclination slope of the first drainage ditch is 0.1% - 0.2%.

4. The membrane-covered exhaust and drainage device according to claim 1, characterized in that The exhaust structure includes exhaust holes opened on the inner wall membrane, and the distance between the exhaust holes and the open mouth of the well body is 4 cm - 6 cm.

5. The sub-membrane exhaust and drainage device according to any one of claims 1-4, characterized in that, There is one first drainage ditch, and both ends of the first drainage ditch are respectively communicated with the well bodies on both sides; there are two second drainage ditches, and the two second drainage ditches are evenly distributed at equal intervals between the center of the pond bottom and the well body, and the two second drainage ditches are respectively perpendicular to and intersect with the first drainage ditch.

6. The membrane-covered exhaust and drainage device according to any one of claims 1-4, characterized in that, Drainage and silt prevention plates are respectively laid on both sides of the first drainage ditch, and granular materials are arranged inside the first drainage ditch; And / or, granular materials are provided on both the inner side and the upper sides inside the first drainage ditch. A drainage and silt prevention board is laid on the granular materials on both upper sides of the first drainage ditch, and the geomembrane covers the drainage and silt prevention board.

7. A method for membrane - covered exhaust and drainage using the membrane - covered exhaust and drainage device according to any one of claims 1 - 6, characterized in that, The method includes: providing a regulating pond, the regulating pond including a pond bottom and two opposite side walls, the pond bottom being arranged in a symmetric slope from the two side walls towards the center direction, and the pond bottom having a slope that slopes downward from the side walls to the center of the pond bottom; arranging a well body at the pond bottom position near at least one of the two side walls, a part of the well body extending downward to the lower part of the pond bottom, and another part of the well body extending out above the pond bottom; a drainage ditch is formed in the pond bottom of the regulating pond, the drainage ditch including a first drainage ditch and a second drainage ditch, the first drainage ditch and the second drainage ditch being arranged perpendicular to and intersecting with each other, the first drainage ditch being inclined, and the inclination direction of the first drainage ditch being opposite to the inclination direction of the pond bottom, the first drainage ditch being communicated with the well body; the regulating pond, the drainage ditch and the well body are all covered with a geomembrane; the top of the well body is open, the geomembrane extends from the opening to the inner wall of the well body to form an inner wall membrane, and the inner wall membrane is provided with an exhaust structure. By means of the pond bottom slope of the regulating pond and the well body and the exhaust structure, the gas under the membrane is discharged; by means of the inclination direction of the first drainage ditch being opposite to the inclination direction of the pond bottom, the water under the membrane is discharged through the second drainage ditch, the first drainage ditch and the well body in sequence.

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