CN220620354U

CN220620354U - Underground liquid drainage system

Info

Publication number: CN220620354U
Application number: CN202322218809.9U
Authority: CN
Inventors: 苟广宁; 姚清宝; 赵建华; 鲁楠
Original assignee: Xi'an Century Metal Structure Co ltd
Current assignee: Xi'an Century Metal Structure Co ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-03-19
Anticipated expiration: 2033-08-17

Abstract

The utility model relates to an underground liquid drainage system, which comprises a drainage pipe unit arranged above an anti-seepage system of a drainage area; the drainage pipe guide unit comprises a blind ditch lower disc, a blind ditch upper disc and a soft permeable pipe, wherein an anti-seepage shell is fixedly covered outside the blind ditch lower disc, the anti-seepage shell is fixedly connected with a drainage area anti-seepage system, and a first pipe groove is arranged at the center of the upper end of the blind ditch lower disc; the lower extreme central authorities of french drain upper disc set up the second tube chute, and the french drain upper disc lock is fixed on the french drain lower disc, and first tube chute and second tube chute are just to constituting the long chamber of pipeline accommodation, the pipeline holds long intracavity and sets up many soft water permeability pipes. The drainage system can realize automatic collection and drainage of underground liquid, and the arrangement of the drainage system does not need a great deal of earthwork and complicated procedures, so that the resources and the cost are saved, and the damage to the environment is reduced.

Description

Underground liquid drainage system

Technical Field

The utility model relates to the technical field of underground liquid collection and drainage, in particular to an underground liquid drainage system which is suitable for underground submerged collection and drainage and collection and drainage of seepage liquid of various tailing ponds, solid waste landfills and refuse landfills.

Background

The collection and drainage of underground liquid is an important environmental protection and resource utilization project, and relates to a plurality of industries and fields, such as agriculture, metallurgy, coal mine, power plant, chemical industry, garbage disposal and the like. The collection and drainage of the underground liquid can not only prevent the underground water level from being abnormal and causing salinization or sedimentation of soil, but also recycle the underground water or leachate, thereby reducing the emission of pollutants.

Aiming at the storage fields in various fields, the current focus is mainly on the seepage prevention treatment of the bottom, and how to effectively and reliably dredge the deposited seepage solution is ignored. The conventional permeable pipe diversion construction method is that after the impermeable construction of the pile storage area is completed, a plurality of permeable pipes are placed at the relatively lower part of the upper part of the pile storage area, gravel and broken stone are adopted for protection and positioning on the four peripheries and the foundation, and the leachate collected at the low-lying part of the field is dredged. Although the mode can meet the use requirement in theory, the construction difficulty is high, and the arrangement of the permeable pipes easily damages an impermeable layer formed by the prior impermeable construction, so that the impermeable requirement of the whole drainage guide system is influenced; in addition, the design and installation requirements of the structure on the permeable pipe network are high, and the permeable pipe is easy to be blocked.

There is also a drainage system based on a drilling drainage method in the prior art, wherein the drainage system drills holes in a region or a stratum where underground liquid is concentrated, a shaft and a filter are arranged in the drill holes, and the underground liquid is pumped out or drained out by a pump or a gravity flow mode. The method is suitable for the condition of low water level or uneven distribution of underground liquid, but has the advantages of large drilling quantity, high cost and high requirement on geological conditions, and is easy to cause soil structure change and pollutant diffusion.

Therefore, it is needed to provide an underground liquid drainage system with good drainage effect and low construction cost.

Disclosure of Invention

The utility model provides an underground liquid drainage system, which aims to solve the problems of poor drainage effect, high construction cost and the like of the drainage system in the prior art.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

an underground liquid drainage system comprising a drainage pipe unit disposed over a drainage zone barrier system;

the drainage and guide pipe unit comprises a blind ditch lower disc, a blind ditch upper disc and a soft permeable pipe, wherein an anti-seepage shell is fixedly covered outside the blind ditch lower disc, the anti-seepage shell is fixedly connected with a drainage area anti-seepage system, and a first pipe groove is arranged in the center of the upper end of the blind ditch lower disc; the lower extreme central authorities of french drain upper disc set up the second tube chute, and the french drain upper disc lock is fixed on the french drain lower disc, and first tube chute and second tube chute are just to constituting the long chamber of pipeline accommodation, the pipeline holds long intracavity and sets up many soft water permeable pipes.

Further, the blind drain lower disc and the blind drain upper disc are both plastic blind drains with half structures, and the blind drain upper disc is buckled and adhered to the blind drain lower disc to form an integral structure with a round corner rectangle section.

Furthermore, the anti-seepage shell is a geomembrane coated outside the lower disc of the blind drain.

Further, two soft permeable pipes are arranged, and the two soft permeable pipes are horizontally arranged in the long cavity for accommodating the pipeline.

Further, the soft permeable tube comprises a lining spiral steel wire, and a permeable layer, a filter layer and a coating layer are sequentially coated outside the lining spiral steel wire; the permeable layer is non-woven geotextile, the filter layer is nylon geotextile, and the coating layer is synthetic polyester fiber.

Further, the surface of the plastic blind ditch is provided with 95-97% of holes, and the void ratio is 80-95%.

Furthermore, the seepage-proofing system is a geomembrane seepage-proofing system covered on the guide area, and the seepage-proofing shell and the field bottom seepage-proofing system are fixedly connected through hot melt welding or bonding.

Further, the seepage-proofing system is a clay lining seepage-proofing system positioned in the guide and discharge area, and a limiting canal for accommodating the guide and discharge pipe units is arranged on the clay lining.

Further, a plurality of groups of the guide and discharge pipe units are closely arranged in parallel to form a continuous guide and discharge pipe belt.

Further, a plurality of groups of the guide and discharge pipe units are arranged in parallel at intervals to form an intermittent guide and discharge pipe belt.

Compared with the prior art, the utility model has the beneficial effects that:

1. the drainage system can realize automatic collection and drainage of underground liquid, and the arrangement of the drainage system does not need a great deal of earthwork and complicated procedures, so that the resources and the cost are saved, and the damage to the environment is reduced.

2. According to the drainage system, the soft permeable pipe is arranged in the plastic blind ditch, so that an impermeable system with an impermeable shell is constructed, and after the plastic blind ditch is subjected to primary filtration and permeation, the soft permeable pipe is subjected to secondary filtration, so that the problems of blockage, breakage and the like of the soft permeable pipe are avoided, and the pressure resistance, the water permeability, the filtration and the corrosion resistance of the drainage pipe unit are ensured.

3. The drainage system can adapt to different geological conditions and underground liquid distribution characteristics, and different arrangement modes are formed by arranging the drainage pipe units, such as close parallel arrangement, interval parallel arrangement and the like, so that full-section collection and drainage of underground liquid are realized, and the effect and efficiency of drainage engineering are improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a single conduit unit of embodiment 1 of the present utility model;

FIG. 2 is a schematic cross-sectional view of a blind drain pan according to embodiment 1 of the present utility model;

FIG. 3 is a schematic cross-sectional view of a blind drain pan according to embodiment 1 of the present utility model;

FIG. 4 is a schematic diagram of the attachment of the blind drain pan to the geomembrane barrier system of example 1 of the present utility model;

FIG. 5 is a schematic diagram showing the connection of the blind drain pan and the clay layer seepage prevention system according to embodiment 2 of the present utility model;

in the figure, the bottom plate of the 1-blind ditch, the upper plate of the 2-blind ditch, the 3-soft permeable pipe, the 4-impermeable shell, the 5-geomembrane impermeable system and the 6-clay lining are shown.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the patent and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the patent.

In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be. The present utility model will be described in detail with reference to the accompanying drawings and examples.

Example 1:

the embodiment discloses an underground liquid drainage system which is used for drainage and dredging of seepage and leaching liquid in a drainage area of a landfill.

Referring to fig. 1, in this embodiment, the drainage area seepage prevention system of the refuse landfill is a geomembrane seepage prevention system 5 laid on the bottom of the landfill, and the drainage system comprises a single drainage pipe unit arranged above the drainage area geomembrane seepage prevention system 5; the drainage and guide pipe unit comprises a blind ditch lower disc 1, a blind ditch upper disc 2 and a soft permeable pipe 3, wherein an impermeable shell 4 is fixedly covered outside the blind ditch lower disc 1, the impermeable shell 4 is fixedly connected with a drainage area geomembrane impermeable system 5, and a first pipe groove is arranged in the center of the upper end of the blind ditch lower disc 1; the lower end center of the blind ditch upper disc 2 is provided with a second pipe groove, the blind ditch upper disc 2 is buckled and fixed on the blind ditch lower disc 1, the first pipe groove and the second pipe groove are opposite to each other and are spliced to form a pipeline accommodating long cavity, in the embodiment, the accommodating long cavity comprises two adjacent circular pipe cavities, and two soft water permeable pipes 3 are arranged in the pipeline accommodating long cavity; in other embodiments, the number and arrangement of the soft permeable pipes may be adjusted according to the engineering requirements.

Referring to fig. 2 and 3, in this embodiment, the blind drain lower disc 1 and the blind drain upper disc 2 are both plastic blind drains with a half-width structure, the plastic blind drain is a novel geosynthetic material, and is a three-dimensional net structure formed by modifying thermoplastic synthetic resin, extruding fine plastic filaments through a nozzle in a hot-melt state, and welding the junctions of the plastic filaments. The water-collecting type porous ceramic material has the advantages of high surface aperture ratio, good water collection property, large void ratio, good drainage property, strong compression resistance, good durability, light weight, convenient construction and the like. The plastic blind ditch arranged outside can filter the seepage liquid in the drainage area of the landfill site for the first time, reduce suspended matters in water and protect the soft water permeable pipe 3 from being blocked and damaged.

The blind drain upper disc 2 is placed and buckled on the blind drain lower disc 1, a pipeline containing long cavity is formed in the middle of the blind drain upper disc, the cross section of the blind drain upper disc is of a round-corner rectangular integral structure, the cross section of the round-corner rectangular cross section structure can increase the cross section area of the pipe guiding and arranging unit and the containing space of the pipeline containing long cavity, and then the water permeability and the filtering performance of the pipe guiding and arranging unit are improved. The round-corner rectangular cross-section structure can enhance the overall rigidity and stability of the pipe guiding and arranging unit and prevent the pipe guiding and arranging unit from being deformed or damaged due to soil pressure or load; the blind ditch upper disc 2 and the blind ditch lower disc 1 with the half-width structures are convenient for splicing the two and forming a long cavity for accommodating a pipeline, so that the arrangement process of the on-site drainage guide system is simplified, and the construction cost is saved.

In order to enable the drainage system to have good seepage and drainage effects, the surface of the plastic blind ditch is provided with 97% of holes, and the void ratio is 95%. The surface open pore shelter is the proportion that the surface open pore part of plastics french drain accounts for, and the surface open pore shelter is higher, and the demonstration plastics french drain can contact more water, and this embodiment plastics french drain has very strong water collecting capacity and permeable capacity. The void ratio is the proportion of the void part inside the plastic blind ditch, and the larger the void ratio is, the more water bodies can be accommodated in the plastic blind ditch, and the plastic blind ditch has strong drainage capacity.

Referring to fig. 4, the impermeable casing 4 is a HDPE (High Density Polyethylene) geomembrane coated outside the lower disc of the blind ditch, is the same as the geomembrane impermeable system 5 paved at the bottom of the blind ditch, and is fixedly connected with the geomembrane impermeable system 5 at the bottom of the blind ditch into a whole in a hot-melt welding manner; the HDPE geomembrane has excellent environmental stress cracking resistance, low temperature resistance, ageing resistance and corrosion resistance, and can effectively prevent collected leachate from flowing out of the blind ditch; meanwhile, the HDPE geomembrane can support the blind drain lower disc 2 with certain strength, so that the blind drain lower disc 2 is prevented from being deformed or damaged. It should be noted that, in other embodiments, the geomembrane impermeable system 5 and the impermeable casing 4 of the field bottom may be integrally connected by means of strong glue.

The soft permeable pipe 3 comprises a lining spiral steel wire serving as a framework, wherein the lining spiral steel wire is subjected to rust prevention treatment and can bear the pressure of external force and the weight of soil body, so that the shape and smoothness of a pipeline are maintained; a permeable layer, a filter layer and a coating layer are sequentially coated outside the lining spiral steel wire; the permeable layer is an inner layer, is made of non-woven geotextile, and can play a role in reverse filtration to prevent mud sand impurities from entering the pipe; the filter layer is an intermediate layer, is made of nylon geotextile, and can effectively filter and prevent sediment from entering the pipe; the coating layer is the outermost layer, is made of synthetic polyester fiber, has excellent water absorption, tensile strength and wear resistance, and can rapidly collect redundant water around. The principle of the soft water permeable pipe 3 is to utilize the capillary phenomenon and the siphon principle, and collect water absorption, water permeability and water drainage are finished in one go; the infiltration liquid infiltrates into the permeable layer through the coating layer and the filter layer, enters the inside of the guide pipe formed by the lining steel wires under the action of pressure, and is discharged by the guide pipe.

The following describes the construction steps of this embodiment:

step S1, selecting a lower position in a landfill storage area as a guide area, and cleaning, leveling and compacting the bottom of the landfill to ensure that the bottom has a certain gradient and strength according to design requirements.

And S2, paving a geomembrane seepage-proofing system at the bottom of the field, and splicing and fixing in a welding or bonding mode to form a continuous, complete and seamless seepage-proofing layer.

And S3, constructing a single-row drainage and guide pipe unit above the impermeable layer, connecting and fixing the impermeable shell of the blind ditch lower disc and the impermeable layer in a hot-melt welding mode, arranging two soft water permeable pipes in parallel in a second pipe groove of the blind ditch lower disc, fastening and fixing the blind ditch upper disc on the blind ditch lower disc, positioning the soft water permeable pipes in a pipeline accommodating long cavity, and leading one end of the soft water permeable pipes out to a water collecting well or an adjusting tank.

Step S4, covering a protective layer above each pipe guiding and arranging unit, wherein the protective layer can be gravel, broken stone or other materials, and the thickness of the protective layer can be used for protecting the pipe guiding and arranging unit from the influence of garbage load and mechanical action.

And S5, landfill is carried out above the protective layer, and landfill, compaction and coverage are carried out according to design requirements, so that the stability and safety of a landfill site are ensured.

The drainage guide system of the embodiment can effectively collect and guide the leachate generated in the landfill storage area of the landfill site, prevent the leachate from polluting a lower anti-seepage system and the surrounding environment, and simultaneously improve the water permeability, the filtering performance and the pressure resistance of the drainage guide pipe unit by utilizing the elasticity of the soft permeable pipe and the gaps of the plastic blind ditches, reduce the construction difficulty and the cost and improve the engineering quality and the efficiency.

Example 2:

the embodiment discloses an underground liquid drainage system which is used for drainage and dredging of leachate generated in a coal mine tailing pond.

Referring to fig. 5, in this embodiment, the drainage area seepage control system of the mine tailing pond is a clay liner 6 seepage control system laid on the bottom of the pond, and the drainage system comprises a plurality of rows of drainage pipe units arranged above the drainage area clay liner 6 seepage control system; the multiple rows of guide and discharge pipe units are closely arranged in parallel to form a continuous guide and discharge pipe belt, and blind ditch bottom plates 1 of the multiple rows of guide and discharge pipe units are respectively arranged in the limiting channels of the clay lining 6.

Other technical features of this embodiment are the same as those of embodiment 1.

The multiple rows of guide and discharge pipe units are closely arranged in parallel, so that the total cross section area and total accommodating space of the guide and discharge system can be increased, and the water permeability and the filtering performance of the guide and discharge system are improved; the redundancy and the reliability of the guide and exhaust system are improved, and even if a certain guide and exhaust pipe unit is blocked or damaged, the normal operation of the whole guide and exhaust system is not affected.

It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims

1. An underground liquid drainage system, characterized in that the drainage system comprises a plurality of groups of drainage pipe units arranged above a drainage area seepage-proofing system;

2. The underground liquid drainage system of claim 1, wherein the lower blind drain pan and the upper blind drain pan are both semi-width plastic blind drains, and the upper blind drain pan is fastened and adhered to the lower blind drain pan to form an integral structure with a round rectangular cross section.

3. The underground liquid drainage system of claim 1 or 2, wherein the impermeable casing is a geomembrane that is wrapped around the bottom wall of the blind drain.

4. The underground liquid drainage system of claim 3, wherein two soft water permeable pipes are provided, and two soft water permeable pipes are horizontally arranged in the long pipeline accommodating cavity.

5. The underground liquid drainage system of claim 4, wherein the soft permeable pipe comprises a lining spiral steel wire, and the lining spiral steel wire is sequentially coated with a permeable layer, a filter layer and a coating layer; the permeable layer is non-woven geotextile, the filter layer is nylon geotextile, and the coating layer is synthetic polyester fiber.

6. The underground liquid drainage system of claim 2, wherein the plastic blind drain has a surface open-cell shelter of 95-97% and a void fraction of 80-95%.

7. The underground liquid drainage system of claim 5, wherein the impermeable system is a geomembrane impermeable system covering the drainage area, and the impermeable casing is fixedly connected with the ground bottom impermeable system by hot melt welding or bonding.

8. The underground liquid drainage system of claim 5, wherein the barrier is a clay liner barrier in the drainage area, and a spacing canal is provided in the clay liner to accommodate the drainage pipe units.

9. The underground liquid drainage system of claim 1, wherein a plurality of sets of said drainage tube units are arranged in close proximity and in parallel to form a continuous drainage tube strip.

10. The underground liquid drainage system of claim 1, wherein a plurality of sets of said drainage tube units are arranged in parallel at intervals to form intermittent drainage tube strips.