CN115094820A - Underground water pollution risk control system for valley type landfill - Google Patents
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- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
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Abstract
The invention discloses a groundwater pollution risk control system for a valley type landfill, which is characterized in that a leachate seepage-proof vertical curtain is built underground at the groundwater outlet position of the whole valley type landfill to prevent polluted groundwater from flowing out; constructing a groundwater blocking vertical curtain along the underground part of the landfill edge to cooperate with a leachate impermeable vertical curtain to form a closed surrounding for the landfill in the reservoir and block peripheral groundwater from entering the reservoir area; constructing an interception and elevation well to extract leachate generated in the reservoir for treatment; constructing a precipitation well in the reservoir to reduce the underground water level in the reservoir to be below the bottom of the landfill, so as to avoid the generation of percolate; building an out-of-reservoir dewatering well to reduce the underground water level nearby outside the reservoir, so that the water quantity entering the reservoir area through the underground water blocking vertical curtain is reduced; and building a sealing covering structure to cover the landfill, and preventing rainwater and surface water from permeating into the landfill. The system can completely eliminate the pollution risk of the valley type landfill to the surrounding underground water.
Description
Technical Field
The invention relates to the technical field of underground water pollution prevention and control, in particular to an underground water pollution risk control system for a valley type landfill.
Background
The valley type landfill is a landfill which builds an interception dam at the valley mouth of a natural valley and then buries waste in the valley upstream of the interception dam, and has the advantages of large storage capacity and low construction cost. A large number of valley type landfill sites exist in China, and are divided into valley type domestic garbage landfill sites, valley type tailing reservoirs, valley type industrial solid waste landfill sites, valley type dangerous waste landfill sites and the like according to different landfill objects. Because people in the early stage have slight environmental awareness and low environmental requirements, most of the environmental protection measures of the valley type landfill built in China in the past are incomplete, and measures such as covering, bottom seepage prevention and the like are lacked, or the environmental protection measures are gradually ineffective due to poor construction quality. These legacy valley-type landfills have caused pollution or present a greater risk of contamination to surrounding groundwater, leading to frequent environmental events in recent years with respect to valley-type landfills. Therefore, there is a need to take systematic engineering measures for these legacy valley-type landfills to eliminate their risk of groundwater contamination.
Disclosure of Invention
The invention aims to provide an underground water pollution risk control system for valley-type landfill banks, which aims to solve the problem that the environment events of the valley-type landfill banks are frequent in recent years due to the fact that the left valley-type landfill banks pollute the surrounding underground water or have great pollution risk hidden dangers.
The invention provides a groundwater pollution risk control system for a valley type landfill, which comprises: constructing a percolate seepage-proofing vertical curtain around an interception dam in a U shape under the ground at the valley opening underground water outlet position of the whole valley type landfill reservoir, constructing underground water separation vertical curtains along the underground of the edges of the landfill matters in the reservoir from the end points of two U-shaped wings of the percolate seepage-proofing vertical curtain, and forming closed surrounding of the landfill matters in the reservoir by the cooperation of the underground water separation vertical curtains and the percolate seepage-proofing vertical curtains;
further, building a plurality of intercepting lift wells at the upstream and the downstream of the intercepting dam in the U-shaped area of the seepage-proofing vertical curtain of the percolate; constructing a plurality of precipitation wells in a warehouse in landfill covering areas outside the influence range of all intercepting lifting wells; constructing a plurality of external precipitation wells in a single row along the outer edge of the underground water blocking vertical curtain; and constructing a sealing covering structure on the upper part of the landfill to completely cover the landfill.
Furthermore, the seepage-proof vertical curtain for the percolate is integrally built underground, and the bottom is inserted with a permeability coefficient K which is less than or equal to 1 multiplied by 10 -7 The permeability coefficient K of the vertical impervious percolate curtain per se in a cm/s impervious stratum is more than 2m and less than or equal to 1 multiplied by 10 -7 cm/s。
Furthermore, the underground water blocking vertical curtain is integrally built underground, and the bottom is inserted with a permeability coefficient K which is less than or equal to 1 multiplied by 10 -5 cm/s of relatively impervious stratum more than 2m, and the permeability coefficient K of the underground water barrier vertical curtain is less than or equal to 1 multiplied by 10 -5 cm/s。
Further, the bottom of the interception lift well is drilled until the permeability coefficient K is less than or equal to 1 multiplied by 10 -5 The bottom of the relative impervious layer of cm/s, the water level in the well is controlled within the thickness range of the relative impervious layer, the total pumping capacity of all the intercepting lift wells is larger than the percolate production of the landfill, and the influence range of all the intercepting lift wells is setThe U-shaped area surrounded by the whole percolate seepage-proofing vertical curtain except the area occupied by the interception dam is completely covered.
Further, the bottom of the precipitation well in the warehouse is drilled until the permeability coefficient K is more than 1 multiplied by 10 -5 The water level in the well is controlled to be at the bottom of the permeable stratum below the bottom of the landfill, the total pumping capacity of all the precipitation wells in the warehouse is larger than the infiltration amount of the groundwater outside the warehouse after the underground water barrier vertical curtain and the percolate anti-seepage vertical curtain are built, and the influence range of all the precipitation wells in the warehouse is set to completely cover the landfill covering area outside the influence range of the interception lifting well.
Further, the bottom of the precipitation well outside the reservoir is drilled until the permeability coefficient K is more than 1 multiplied by 10 -5 And the control water level of each precipitation well outside the reservoir is higher than the control water level of the precipitation well in the reservoir closest to the bottom of the permeable stratum by 3m at the cm/s permeable stratum bottom.
Furthermore, the sealing covering structure is positioned above the landfill, the edge of the sealing covering structure is connected with the top planes of the underground water barrier vertical curtain and the percolate seepage-proofing vertical curtain, the landfill at the upstream of the interception dam is completely covered, the sealing covering structure is sequentially provided with a nutrition vegetation layer, a drainage layer, an impermeable layer and an exhaust layer from top to bottom, wherein the permeability coefficient of the impermeable layer is less than 1 multiplied by 10 -7 cm/s。
Furthermore, the underground water level in the underground water blocking vertical curtain is controlled below the underground water level outside the underground water blocking vertical curtain by the in-warehouse dewatering well, so that the height difference is formed between the underground water level inside and outside the underground water blocking vertical curtain, and polluted underground water in the in-warehouse cannot seep out of the in-warehouse.
Furthermore, the precipitation well outside the reservoir reduces the underground water level outside the reservoir near the underground water blocking vertical curtain, so that the water head difference inside and outside the underground water blocking vertical curtain is reduced, the contact area between the underground water outside the reservoir and the underground water blocking vertical curtain is reduced, and the purpose of reducing the infiltration amount of the underground water outside the reservoir into the reservoir through the underground water blocking vertical curtain is achieved.
According to the technical scheme, the underground water pollution risk control system for the valley type landfill is characterized in that a percolate seepage-proofing vertical curtain is built underground at the underground water outlet position of the whole valley type landfill to prevent polluted underground water from flowing out; constructing a groundwater blocking vertical curtain along the underground of the landfill edge to cooperate with a leachate impermeable vertical curtain to form a closed surrounding for the landfill in the reservoir and block peripheral groundwater from entering the reservoir area; constructing an interception and elevation well to extract leachate generated in the reservoir for treatment; constructing a precipitation well in the reservoir to reduce the underground water level in the reservoir to be below the bottom of the landfill, so as to avoid the generation of percolate; building an out-of-reservoir dewatering well to reduce the underground water level nearby outside the reservoir, so that the water quantity entering the reservoir area through the underground water blocking vertical curtain is reduced; and building a sealing covering structure to cover the landfill, and preventing rainwater and surface water from permeating into the landfill. The system can completely eliminate the pollution risk of the valley type landfill to the surrounding underground water, avoid the contact between the landfill in the landfill and the external environment to cause environmental pollution, prevent the landfill on the surface layer in the landfill from causing environmental pollution along with the atmospheric dispersion, and has good environmental benefit; and the construction method has the advantages of relatively low construction cost, relatively short construction period, low subsequent operation cost and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a plan view of a groundwater pollution risk control system for a valley type landfill according to the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of a groundwater pollution risk control system for a valley type landfill according to the present invention;
FIG. 3 is a schematic cross-sectional view B-B of a groundwater pollution risk control system for a valley type landfill according to the present invention.
Illustration of the drawings: 1-leachate impermeable vertical curtain; 2-underground water blocking vertical curtain; 3-sealing a covering structure; 4-intercepting a dam; 5-impermeable formation; 6-relatively impermeable formations; 7-permeable formation; 8-landfill; 9-intercepting a lift well; 10-a precipitation well in the warehouse; 11-precipitation well outside the reservoir.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Spatially relative terms, such as "above … …", "above … …", "above … …, on a surface", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1 to 3, the valley type landfill related to the present invention is mainly constructed with an interception dam 4 positioned at a valley opening, a landfill 8 stocked upstream of the interception dam 4, and a natural formation under the landfill. The lower natural stratum is divided into the following layers according to different permeability coefficients: permeable stratum 7 with permeability coefficient K > 1X 10 -5 cm/s, typically the uppermost portion of the natural formation, in direct contact with the landfill 8; relative to the impermeable formation 6, permeability coefficient 1 x 10 -7 cm/s＜K≤1×10 -5 cm/s, typically the middle portion of a natural formation, between a permeable formation 7 and a impermeable formation 5; impervious stratum 5 with permeability coefficient K less than or equal to 1 × 10 -7 cm/s, generally the lowest part of the natural stratum, and is buried deep. It is generally considered that it is difficult for groundwater to pass through a permeability coefficient K.ltoreq.1X 10 -7 In a cm/s artificial or natural structure, the groundwater may pass through a small amount with a permeability coefficient of 1X 10 -7 cm/s＜K≤1×10 -5 cm/s artificial or natural configuration.
The underground water pollution risk control system for the valley type landfill comprises a percolate seepage-proofing vertical curtain 1, an underground water obstruction vertical curtain 2, an interception lifting well 9, an in-reservoir dewatering well 10, an out-of-reservoir dewatering well 11 and a sealing covering structure 3.
The leachate seepage-proofing vertical curtain 1 is arranged at a downstream valley port of the landfill, and the groundwater outlet position of the whole landfill is arranged around the interception dam 4 in a U shape. The vertical impervious percolate curtain is integrally built underground, the top of the vertical impervious percolate curtain is flush with the ground, and the bottom of the vertical impervious percolate curtain is inserted into an impervious stratum for more than 2 m. The permeability coefficient K of the seepage-proof vertical curtain of the percolate is less than or equal to 1 multiplied by 10 -7 cm/s, which has the function of preventing underground water (namely percolate) polluted by landfill materials in the landfill from flowing downstream, so that the percolate is finally collected in the U-shaped percolate anti-seepage vertical curtain to prevent the downstream water body from being polluted. Engineering of seepage-proof vertical curtain of percolateThe construction mode can be as follows: plastic concrete underground continuous walls, HDPE film underground vertical impervious walls and the like.
The underground water separation vertical curtain 2 is arranged along the edge of the covering area of the landfill object 8 from the end points of two U-shaped wings of the percolate seepage-proofing vertical curtain 1, the underground water separation vertical curtain 2 and the percolate seepage-proofing vertical curtain 1 cooperate to form a closed surrounding for the landfill object 8 in the warehouse, and the landfill object 8 is completely positioned on the inner sides of the underground water separation vertical curtain 2 and the percolate seepage-proofing vertical curtain 1. The underground water blocking vertical curtain is integrally built underground, the top of the underground water blocking vertical curtain is flush with the ground, and the bottom of the underground water blocking vertical curtain is inserted into the relatively impermeable stratum for more than 2 m. The permeability coefficient K of the underground water barrier vertical curtain is less than or equal to 1 multiplied by 10 -5 cm/s, which is used for preventing uncontaminated groundwater around the landfill from greatly permeating into the reservoir area and forming percolate after being polluted, and reducing the generation amount of the percolate in the reservoir area. The engineering construction mode of the underground water blocking vertical curtain can be as follows: curtain grouting, high-pressure jet grouting secant pile and the like.
A plurality of intercepting lift wells 9 are arranged at the upstream and the downstream of the intercepting dam 4 in the U-shaped area of the leachate seepage-proofing vertical curtain 1, the intercepting well at the upstream of the intercepting dam 4 is drilled to the bottom of the relative impervious layer from the surface of the landfill, and the intercepting well at the downstream of the intercepting dam 4 is drilled to the bottom of the relative impervious layer from the natural earth surface. The caliber of the intercepting and lifting well is 1.2m, a HDPE perforated pipe of DN710 is arranged in the intercepting and lifting well, the perforated pipe is wrapped by a fabric geotextile, pebbles are filled between the perforated pipe and the well wall, and a submersible sewage pump is arranged in the perforated pipe at the bottom of the well. The water level in the well is controlled within the thickness range of the relative impervious layer. The interception lifting well has the functions of pumping out the percolate collected in the U-shaped percolate anti-seepage vertical curtain, and the pumped percolate is sent to a subsequent treatment device for treatment, and the sum of pumping out capacities of all the interception lifting wells is greater than the percolate generation amount of the landfill. The plane influence range of the single interception lifting well is a circular area taking the center of the interception lifting well as the center of a circle, the radius of the circular area is determined through field tests, a plurality of interception lifting wells are uniformly distributed in a U-shaped area (the area occupied by the interception dam is not required to be distributed) formed by the leachate seepage-proofing vertical curtain, and the influence range of all the interception lifting wells completely covers the whole U-shaped area except the area occupied by the interception dam.
The area covered by the landfill 8 outside the range of all the interception lift wells 9 is provided with a plurality of openings for the precipitation well 10 in the warehouse, the precipitation well in the warehouse is drilled to the bottom of a permeable stratum from the surface of the landfill, the caliber of the precipitation well in the warehouse is 1.2m, a HDPE perforated pipe of DN710 is arranged in the perforated pipe, the perforated pipe is wrapped by a fabric geotextile, pebbles are filled between the perforated pipe and the well wall, and a submersible sewage pump is arranged in the perforated pipe at the bottom of the well. The water level in the well is controlled at the bottom of the permeable stratum. The function of the in-reservoir dewatering well is to lead out the retained groundwater in the landfill, so that the groundwater level in the area covered by the landfill is reduced to be below the bottom of the landfill, the slag-water separation is realized, the generation of percolate is avoided, the groundwater level in the groundwater barrier curtain (the groundwater level in the reservoir) is controlled to be below the groundwater level outside the groundwater barrier curtain (the groundwater level outside the reservoir), the height difference between the inside and outside groundwater levels of the groundwater barrier curtain is formed, and the seepage of the polluted groundwater (percolate) in the reservoir to the outside of the reservoir is prevented. The groundwater extracted at the initial stage of building the precipitation well in the warehouse is polluted groundwater (percolate) which is then sent to a subsequent treatment device for treatment; after the underground water level in the reservoir is reduced to be below the bottom of the landfill, the percolate retained in the landfill can not seep out, the percolate can not be generated any more, and the pumped underground water is clean underground water slowly seeped from the outside of the reservoir and can be directly discharged without treatment. The sum of the pumping capacities of all the precipitation wells in the reservoir is greater than the infiltration amount of the groundwater outside the reservoir into the reservoir after the groundwater barrier vertical curtain and the percolate seepage-proof vertical curtain are built. The plane influence range of the single-port in-warehouse dewatering well is a circular area with the center of the in-warehouse dewatering well as the center of the circle, the radius of the circular area is measured through field tests, a plurality of ports are arranged in the landfill covering area of the in-warehouse dewatering well outside the influence range of all intercepting lifting wells, and the influence range of all in-warehouse dewatering wells completely covers the landfill covering area outside the influence range of the intercepting lifting wells.
The plurality of the precipitation wells 11 outside the reservoir are arranged in a single row along the outer edge of the underground water blocking vertical curtain 2, the distance between the center of each precipitation well outside the reservoir and the outer edge of the underground water blocking vertical curtain is 2-3m, the spacing distance between every two precipitation wells is determined through field tests, and the arrangement interval of the precipitation wells outside the reservoir can be properly reduced at the position with larger underground water flow. The precipitation well outside the reservoir is drilled from the natural ground surface to the bottom of the permeable stratum, the diameter of a well mouth is 0.6m, a HDPE perforated pipe of DN450 is arranged in the precipitation well, the perforated pipe is wrapped by fabric geotextile, fine gravel is filled between the perforated pipe and the well wall, and a submersible sewage pump is arranged in the perforated pipe at the well bottom. The control water level of each precipitation well outside the reservoir is higher than the control water level of the precipitation well in the reservoir closest to the precipitation well (keeping the water head difference inside and outside the underground water separation curtain) by 3m and is as close to the bottom position of the permeable stratum as possible. The function of the precipitation well outside the reservoir is to reduce the underground water level near the underground water blocking vertical curtain outside the reservoir, reduce the water head difference inside and outside the underground water blocking vertical curtain and reduce the contact area between the underground water outside the reservoir and the underground water blocking vertical curtain, so that the infiltration amount of the underground water which is not polluted outside the reservoir to the reservoir through the underground water blocking vertical curtain is reduced. The underground water pumped by the precipitation well outside the reservoir is generally uncontaminated underground water, and can be directly discharged without treatment.
The sealing covering structure 3 is positioned above the landfill object 8, the edge of the sealing covering structure 3 is connected with the top plane of the underground water barrier vertical curtain 2 and the percolate seepage-proofing vertical curtain 1, and the landfill object 8 at the upstream of the interception dam 4 is completely covered. The sealing covering structure is sequentially provided with a nutrition vegetation layer, a drainage layer, an impermeable layer and an exhaust layer from top to bottom. The nutrient vegetation layer is used for promoting vegetation growth, providing support and nutrients for vegetation growth, and protecting the drainage layer and the impermeable layer, and is usually set to be greening soil with the thickness of more than 500 mm. The drainage layer is used for removing rainwater and surface water penetrating through the nutrient vegetable layer by adopting a material with high permeability, the thickness is generally set to be more than 300mm, the particle size is 20-40 mm, the gravel (pebble) stone or the composite geotechnical net with the thickness being more than 5mm, and the permeability coefficient of the drainage layer is generally more than 1 multiplied by 10 -1 cm/s. The impermeable layer is the most important component in the sealing covering structure, the function of the impermeable layer is to prevent water from permeating the sealing covering structure to enter landfill to form percolate and prevent landfill gas from escaping through the sealing covering structure, the impermeable layer is usually set to be compacted clay with the thickness of more than 300mm or HDPE film and LLDPE film with the thickness of more than 1.5mm, and the permeability coefficient of the impermeable layer is usually less than 1 multiplied by 10 -7 cm/s. The air-release layer is used for providing a stable supporting surface, so that the impermeable layer can be laid on the air-release layer,and collecting landfill gas generated in the landfill, usually set to be more than 300mm gravel (pebble) thickness, and the permeability coefficient of the exhaust layer should be usually more than 1 x 10 -2 cm/s。
The application case is as follows: in a valley type tailing pond of a chemical factory in southwest of China, the covering area of slag is 44639m 2 And a circumference 1054 m. Where landfill slag is identified as a hazardous waste, the tailings ponds lack bottom seepage prevention and covering structures and the downstream groundwater has been contaminated.
According to a reservoir region 'hydrogeological survey report', the height difference between the south and the north of the valley type tailing reservoir is about 52m, the south, the east and the north are provided with surface watershed, the reservoir basin sealing condition is better, the underground water in the reservoir is not easy to leak towards the east, the south and the west under the current flow field condition, the absolute elevation of the surface of a valley opening terrace at the north of the reservoir region is lower than a covering layer of a region of 440m, and the elevation of the watershed is gradually leveled and lower than the height of the terrace at the reservoir region, so that the reservoir region is a unique way for the polluted underground water to leak towards a downstream region. The permeability coefficient K of the lower part of the tailing pond is less than or equal to 1 multiplied by 10 -7 The buried depth of the top of the impervious stratum of cm/s is about 40-61m, and the permeability coefficient is 1 multiplied by 10 -7 cm/s＜K≤1×10 -5 The buried depth at the top of the relatively impermeable stratum of cm/s is about 15-48 m.
The application of the invention to treat the disease:
an underground plastic concrete impervious wall is built around the interception dam in an underground U shape at the valley opening of the north part, the horizontal axis of the impervious wall is 172m in length, two wings of the U shape extend to the position of the absolute elevation 440m of the earth surface, and the integral permeability coefficient K is less than 2 multiplied by 10 -8 cm/s, wall thickness of 1m, downward embedded permeability coefficient K less than or equal to 1 × 10 -7 2m in cm/s impermeable formation, average wall depth 53.1 m.
Vertical curtain grouting is carried out along the edge of slag in an area with the absolute elevation of over 440m of the ground surface from the end points of the U-shaped two wings of the impervious wall, the slag completely surrounds a closed area formed by the cooperation of the plastic concrete impervious wall and the vertical curtain grouting, the horizontal axis of the vertical curtain grouting is 941m in length, three rows of holes are adopted for curtain grouting, the row spacing is 0.5m, the hole spacing is 1m, and the curtain permeability coefficient K is less than 1 multiplied by 10 -5 cm/s, grouting offline embedding permeability coefficient K is less than or equal to 1 multiplied by 10 -5 2m in cm/s formation, average depth 38.7m。
Two intercepting and lifting wells are arranged at the downstream of the intercepting dam in the U-shaped area of the plastic concrete impervious wall and are drilled from the ground surface until the permeability coefficient K is less than or equal to 1 multiplied by 10 -7 The top of the formation in cm/s (again with a permeability coefficient of 1X 10) -7 cm/s＜K≤1×10 -5 cm/s of the bottom of the formation), the average well depth is 39.5 m; six intercepting lift shafts are arranged at the upstream of the intercepting dam and drilled from the surface of the slag until the permeability coefficient K is less than or equal to 1 multiplied by 10 -7 cm/s of the top of the formation, with an average well depth of 54 m. The calibers of all the intercepting and lifting wells are 1.2m, HDPE perforated pipes with DN710 are arranged in the intercepting and lifting wells, the perforated pipes are wrapped by woven geotextile, pebbles are filled between the perforated pipes and the well wall, and the flow rate of the perforated pipes at the bottom of the well is 10m 3 The water level in the well is controlled at the upper part 4m of the bottom of the well. And (4) detecting the underground water pumped by the intercepting and lifting well once every 3 months, comparing the detected underground water with the background value of the upstream underground water, discharging the underground water into a sewage treatment system for treatment if the underground water is polluted, and directly discharging the underground water if the underground water is not polluted.
In the slag covering area with the absolute ground surface elevation above 440m, an opening 24 of a dewatering well in the field is arranged, and the water is drilled from the surface of the slag to the penetration coefficient of 1 multiplied by 10 -7 cm/s＜K≤1×10 -5 The top of the formation in cm/s (again with a permeability coefficient K > 1X 10) -5 cm/s of stratum bottom), the average well depth is 34.6m, the aperture of each dewatering well in each yard is 1.2m, a HDPE perforated pipe with DN710 is arranged in each perforated pipe, the perforated pipes are wrapped by a fabric geotextile, pebbles are filled between the perforated pipes and the well wall, and the flow rate in each perforated pipe at the bottom of the well is 10m 3 The water level in the well is controlled at the upper part of the well bottom by 2 m. And (4) detecting the underground water pumped by the precipitation well in the field once every 3 months, comparing the detected underground water with the background value of the upstream underground water, discharging the underground water into a sewage treatment system for treatment if the underground water is polluted, and directly discharging the underground water if the underground water is not polluted.
64 ports of off-site dewatering wells are arranged in a single row along the outer edge of the underground water separation vertical curtain, the center distance of the off-site dewatering wells is about 3m from the outer edge of the underground water separation vertical curtain, the center distance of the off-site dewatering wells is set to be 16m, and the off-site dewatering wells are drilled from the natural ground surface to the permeability coefficient of 1 multiplied by 10 -7 cm/s＜K≤1×10 -5 cm/s formation top (also permeability)Coefficient K > 1X 10 -5 cm/s of stratum bottom), the average well depth is 35.5m, the calibers of all the off-site dewatering wells are 0.6m, HDPE perforated pipes with DN450 are arranged in the perforated pipes, the perforated pipes are wrapped by woven geotextile, fine gravel is filled between the perforated pipes and the well wall, and the flow rate in the perforated pipes at the bottom of the well is 6.4m 3 The water level in the well is controlled at the upper part of the bottom of the well by 5 m. And the off-site underground water pumped by the off-site dewatering well is discharged into the flood interception ditch of the field area.
And a sealing cover structure is arranged above the slag, the edge of the sealing cover structure is connected with the top planes of the underground water barrier vertical curtain and the percolate impervious vertical curtain, and the total coverage area is 44951m 2. The sealing covering structure comprises a nutrient vegetation layer, a drainage layer, an impermeable layer and an exhaust layer from top to bottom in sequence. The nutrient vegetation layer is greening soil with the thickness of 800mm, and the vegetation is mainly shrubs and ornamental flowers, mainly camellia, pecan, platycladus orientalis, rhododendron, zephyranthes candida and ophiopogon japonicus. The drainage layer is a 5mm composite geonet. The barrier layer was a 1.5mm HDPE film. The exhaust level was 300mm gravel.
After the system is built, the quality of underground water at the downstream of a tailing pond is rapidly and obviously improved, and the concentration of characteristic pollutants is reduced to below the national standard from 14 times exceeding the standard within 6 months. The invention can save the project cost by about 2.4 hundred million yuan (56%) and reduce the construction period by about 360 days (50%).
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances such that, for example, embodiments of the application described herein may be implemented in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A groundwater contamination risk control system for a valley type landfill comprising: constructing a percolate impervious vertical curtain (1) around an interception dam (4) in a U shape under the ground at the valley opening underground water outlet position of the whole valley type landfill reservoir, constructing an underground water separation vertical curtain (2) along the underground of the edge of a landfill object (8) in the reservoir from the two U-shaped wing end points of the percolate impervious vertical curtain (1), and forming a closed surrounding of the landfill object (8) in the reservoir by the cooperation of the underground water separation vertical curtain (2) and the percolate impervious vertical curtain (1);
building a plurality of intercepting lift wells (9) at the upstream and the downstream of the intercepting dam (4) in the U-shaped area of the percolate impervious vertical curtain (1); building a plurality of precipitation wells (10) in a warehouse in a landfill (8) covered area outside the influence range of all intercepting lift wells (9); a plurality of external precipitation wells (11) are built in a single row along the outer edge of the underground water blocking vertical curtain (2); and constructing a closing field covering structure (3) on the upper part of the landfill (8) to completely cover the landfill (8).
2. A groundwater risk control system for valley type landfill according to claim 1, wherein the leachate seepage prevention vertical curtain (1) is integrally built underground with bottom insertion permeability coefficient K ≦ 1 x 10 -7 The permeability coefficient K of the vertical impervious percolate curtain (1) in a cm/s impervious stratum (5) is less than or equal to 1 multiplied by 10 and more than 2m -7 cm/s。
3. A groundwater contamination risk control system as claimed in claim 1 for a valley type landfillThe system is characterized in that the underground water barrier vertical curtain (2) is integrally built underground, and the bottom insertion permeability coefficient K is less than or equal to 1 multiplied by 10 -5 The cm/s relatively impervious stratum (6) is more than 2m, and the permeability coefficient K of the underground water blocking vertical curtain (2) is less than or equal to 1 multiplied by 10 -5 cm/s。
4. A groundwater pollution risk control system for valley type landfills according to claim 1, wherein the interception lift well (9) is drilled at the bottom to permeability K ≦ 1 x 10 -5 The water level in the well is controlled within the thickness range of the opposite impervious bed (6) at the bottom of the cm/s opposite impervious bed (6), the sum of the pumping capacities of all the intercepting and lifting wells (9) is larger than the percolate generation amount of the landfill, and the influence range of all the intercepting and lifting wells (9) is set to completely cover a U-shaped area formed by the whole percolate anti-seepage vertical curtain (1) except the area occupied by the intercepting dam (4).
5. A groundwater pollution risk control system for valley type landfill according to claim 1, wherein the precipitation well (10) in the landfill is drilled to a bottom with permeability coefficient K > 1 x 10 -5 The bottom of the permeable stratum (7) is cm/s, the water level in the well is controlled to be lower than the bottom of the permeable stratum (7) under the bottom of the landfill (8), the sum of the pumping capacities of all the in-warehouse dewatering wells (10) is larger than the infiltration amount of the underground water outside the warehouse into the warehouse after the underground water separation vertical curtain (2) and the percolate seepage-proofing vertical curtain (1) are built, and the influence range of all the in-warehouse dewatering wells (10) is set to completely cover the covering area of the landfill (8) outside the influence range of the interception lifting well (9).
6. A groundwater pollution risk control system for valley type landfill according to claim 1, wherein the extra-reservoir dewatering well (11) is drilled to the bottom with permeability coefficient K > 1 x 10 -5 The control water level of each precipitation well (11) outside the reservoir is higher than the control water level of the precipitation well (10) in the reservoir closest to the bottom of the permeable stratum (7) by 3m at the bottom of the permeable stratum (7) of cm/s.
7. A groundwater pollution risk control system for valley type landfill according to claim 1, wherein the block covering structure (3) is located above the landfill (8), the edge of the block covering structure (3) is connected with the top plane of the vertical groundwater barrier curtain (2) and the vertical leachate barrier curtain (1) to completely cover the landfill (8) upstream of the dam (4), the block covering structure (3) is sequentially provided with a nutrition vegetation layer, a drainage layer, an impermeable layer and an exhaust layer from top to bottom, wherein the permeability coefficient of the impermeable layer is less than 1 x 10 -7 cm/s。
8. The groundwater pollution risk control system for valley type landfill according to claim 1, wherein the precipitation well (10) in the landfill controls the groundwater level inside the groundwater blocking vertical curtain (2) below the groundwater level outside the groundwater blocking vertical curtain (2) so that a height difference is formed between the groundwater level inside and outside the groundwater blocking vertical curtain (2) and polluted groundwater in the landfill cannot seep outside the landfill.
9. A groundwater pollution risk control system for a valley type landfill according to claim 1, wherein the extra-reservoir dewatering well (11) lowers the extra-reservoir groundwater level near the groundwater blocking vertical curtain (2), so that the head difference inside and outside the groundwater blocking vertical curtain (2) is reduced, the contact area between the extra-reservoir groundwater and the groundwater blocking vertical curtain (2) is reduced, and the purpose of reducing the infiltration amount of the extra-reservoir groundwater into the reservoir through the groundwater blocking vertical curtain (2) is achieved.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125404A (en) * | 2022-09-02 | 2022-09-30 | 矿冶科技集团有限公司 | System and method for collecting ion type rare earth ore in-situ leaching field leakage liquid |
| CN115652974A (en) * | 2022-12-15 | 2023-01-31 | 北京高能时代环境技术股份有限公司 | Pollution control system of valley type landfill and construction method |
| CN116377959A (en) * | 2023-06-05 | 2023-07-04 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2999963A1 (en) * | 2012-12-20 | 2014-06-27 | Samid Aziz | System, useful for drainage of leachate from waste landfills, comprises semi-permeable cover for covering excavating portion in ground, where excavation portion comprises sealing unit at its base as geo membrane |
| CN108374384A (en) * | 2018-02-07 | 2018-08-07 | 兰州有色冶金设计研究院有限公司 | A kind of zero-emission system of tailings and implementation |
| CN109235505A (en) * | 2017-06-02 | 2019-01-18 | 北京高能时代环境技术股份有限公司 | Three-dimensional environmental protection complex ecological closing structure |
| CN109940021A (en) * | 2017-12-21 | 2019-06-28 | 天津如纳福科技有限公司 | Refuse landfill planning construction structure |
| CN112922039A (en) * | 2021-01-21 | 2021-06-08 | 中铝环保生态技术(湖南)有限公司 | Negative pressure prevention of seepage clean system |
| CN113863345A (en) * | 2021-11-22 | 2021-12-31 | 中国电建集团贵阳勘测设计研究院有限公司 | Underground water pollution-removing and shunting treatment structure and method for harmful substance storage field |
| CN114293596A (en) * | 2021-11-27 | 2022-04-08 | 中国化学工程第十四建设有限公司 | Vertical seepage-proofing process for large garbage mountain |
| CN114319455A (en) * | 2021-11-27 | 2022-04-12 | 中国化学工程第十四建设有限公司 | Full-coverage sealing, environmental treatment and greening process for large-scale refuse landfill |
| CN114439047A (en) * | 2022-01-27 | 2022-05-06 | 中国地质科学院矿产综合利用研究所 | Method for controlling, guiding and preventing seepage of pollution of tailing pond |
-
2022
- 2022-07-09 CN CN202210807682.1A patent/CN115094820B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2999963A1 (en) * | 2012-12-20 | 2014-06-27 | Samid Aziz | System, useful for drainage of leachate from waste landfills, comprises semi-permeable cover for covering excavating portion in ground, where excavation portion comprises sealing unit at its base as geo membrane |
| CN109235505A (en) * | 2017-06-02 | 2019-01-18 | 北京高能时代环境技术股份有限公司 | Three-dimensional environmental protection complex ecological closing structure |
| CN109940021A (en) * | 2017-12-21 | 2019-06-28 | 天津如纳福科技有限公司 | Refuse landfill planning construction structure |
| CN108374384A (en) * | 2018-02-07 | 2018-08-07 | 兰州有色冶金设计研究院有限公司 | A kind of zero-emission system of tailings and implementation |
| CN112922039A (en) * | 2021-01-21 | 2021-06-08 | 中铝环保生态技术(湖南)有限公司 | Negative pressure prevention of seepage clean system |
| CN113863345A (en) * | 2021-11-22 | 2021-12-31 | 中国电建集团贵阳勘测设计研究院有限公司 | Underground water pollution-removing and shunting treatment structure and method for harmful substance storage field |
| CN114293596A (en) * | 2021-11-27 | 2022-04-08 | 中国化学工程第十四建设有限公司 | Vertical seepage-proofing process for large garbage mountain |
| CN114319455A (en) * | 2021-11-27 | 2022-04-12 | 中国化学工程第十四建设有限公司 | Full-coverage sealing, environmental treatment and greening process for large-scale refuse landfill |
| CN114439047A (en) * | 2022-01-27 | 2022-05-06 | 中国地质科学院矿产综合利用研究所 | Method for controlling, guiding and preventing seepage of pollution of tailing pond |
Non-Patent Citations (3)
| Title |
|---|
| 刘国生;: "止、排及降水技术在垃圾填埋场库区开挖中的应用", 环境与发展 * |
| 张文杰;陈云敏;: "垃圾填埋场抽水试验及降水方案设计", 岩土力学 * |
| 张文杰;陈云敏;詹良通;: "垃圾填埋场渗滤液穿过垂直防渗帷幕的渗漏分析", 环境科学学报 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125404A (en) * | 2022-09-02 | 2022-09-30 | 矿冶科技集团有限公司 | System and method for collecting ion type rare earth ore in-situ leaching field leakage liquid |
| CN115652974A (en) * | 2022-12-15 | 2023-01-31 | 北京高能时代环境技术股份有限公司 | Pollution control system of valley type landfill and construction method |
| CN116377959A (en) * | 2023-06-05 | 2023-07-04 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
| CN116377959B (en) * | 2023-06-05 | 2023-08-15 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
| US11959238B1 (en) | 2023-06-05 | 2024-04-16 | Nanjing Institute Of Environmental Sciences, Mee | Treatment system and method for sandy soil landfill solid waste polluted river channel |
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