CN214253279U - Three-dimensional risk management and control system in soil pollution place - Google Patents
Three-dimensional risk management and control system in soil pollution place Download PDFInfo
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- CN214253279U CN214253279U CN202120083546.3U CN202120083546U CN214253279U CN 214253279 U CN214253279 U CN 214253279U CN 202120083546 U CN202120083546 U CN 202120083546U CN 214253279 U CN214253279 U CN 214253279U
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Abstract
The application provides a three-dimensional risk management and control system in soil pollution place includes: a lower water-resisting layer, a vertical blocking layer, a surface covering impervious layer and an underground water long-term monitoring well; the lower waterproof layer is a foundation layer which is continuously distributed below the underground of the soil pollution risk control field; the vertical barrier layer forms a closed structure to isolate the soil pollution risk control site inside; the surface layer covering impermeable layer is built above the soil pollution risk control site and the vertical barrier layer, and the surface layer covering impermeable layer sequentially comprises a concrete cushion layer, an impermeable layer and a reinforced concrete layer from bottom to top; the underground water long-term monitoring wells are distributed inside the soil pollution risk management and control site. Keep apart the pollutant through the stratum basalis, the perpendicular barrier layer that pollute the continuous distribution of soil lower part and the top layer covering barrier layer that pollutes soil, make the pollutant separation be in the utility model discloses an in the three-dimensional risk management and control system, change the system and have stability strong, characteristics such as the precision is high, with low costs.
Description
Technical Field
The utility model belongs to the technical field of pollute landmass risk management and control, especially, relate to a three-dimensional risk management and control system in soil pollution place.
Background
With the continuous acceleration of the modernization and industrialization process of cities and towns in China, a large amount of toxic and harmful substances enter soil in various modes such as sewage irrigation, atmospheric sedimentation, chemical waste burying and the like, so that the structure and the function of the soil are deteriorated, various potential risks are brought to the ecological environment of the soil and the health of surrounding residents, and the soil pollution becomes a difficult problem facing the whole world. In 2014, "national soil pollution condition survey bulletin" shows that the exceeding rate of the total point location of the soil in China is 16.1%, and the proportion of the exceeding rate of the point location in the soil point locations on two sides of an industrial waste land, an industrial park, a solid waste centralized treatment and disposal site, an oil extraction area, a mining area, a sewage irrigation area and a trunk road reaches 34.9%, 29.4%, 21.3%, 23.6%, 33.4%, 26.4% and 20.3% respectively.
However, at present, the risk control of the soil pollution site in China is in an initial stage, and the method faces the outstanding problems of high uncertainty of the risk control effect of the soil pollution site, lack of accurate and efficient technology and management level, high input cost and the like.
SUMMERY OF THE UTILITY MODEL
The utility model provides a three-dimensional risk management and control system in soil pollution place for solve the great technical problem of soil pollution place risk management and control effect uncertainty.
The utility model provides a pair of three-dimensional risk management and control system in soil pollution place, include: a lower water-resisting layer, a vertical blocking layer, a surface covering impervious layer and an underground water long-term monitoring well;
the lower waterproof layer is a foundation layer which is continuously distributed below the soil pollution risk control field;
the vertical barrier layer forms a closed structure to isolate the soil pollution risk control site inside;
the surface covering impermeable layer is built above the soil pollution risk control site and the vertical barrier layer, and the surface covering impermeable layer sequentially comprises a concrete cushion layer, an impermeable layer and a reinforced concrete layer from bottom to top;
and the underground water long-term monitoring wells are distributed inside the soil pollution risk management and control site.
Preferably, the vertical barrier layer is a cement mixing pile diaphragm wall.
Preferably, the lower end of the vertical barrier layer is embedded in the lower water barrier layer.
Preferably, the distance between the centers of the cement mixing pile cut-off walls is 20cm, the diameter of the pile is 0.5m, the depth of the pile is 10-15m, and the depth of the pile embedded into the lower waterproof layer is 0.5-1 m.
Preferably, the impermeable layer comprises a non-woven geotextile protective layer, an HDPE membrane impermeable layer and a non-woven geotextile protective layer from bottom to top in sequence.
Preferably, the groundwater long term monitoring well is drilled above the underlying water barrier.
Based on above-mentioned embodiment can see, the utility model provides a three-dimensional risk management and control system in soil pollution place, include: a lower water-resisting layer, a vertical blocking layer, a surface covering impervious layer and an underground water long-term monitoring well; the lower waterproof layer is a foundation layer which is continuously distributed below the soil pollution risk control field; the vertical barrier layer forms a closed structure to isolate the soil pollution risk control site inside; the surface layer covering impermeable layer is built above the soil pollution risk control site and the vertical barrier layer, and comprises a concrete cushion layer, an impermeable layer and a reinforced concrete layer from bottom to top in sequence; the underground water long-term monitoring well is arranged in different directions or in the soil pollution risk management and control site. The pollutants are isolated through the continuously distributed basal rock layer, the vertical barrier layer and the surface layer covering impermeable layer of the polluted soil at the lower part of the polluted soil, so that the pollutants are isolated in the three-dimensional risk management and control system of the utility model, and meanwhile, the liquid such as external surface water, underground water and the like can be effectively prevented from entering the three-dimensional risk management and control system through the barrier body, and the pollution factors in the barrier body are effectively prevented from entering a pollution-free area through the barrier body; detecting and monitoring the underground water through the underground water long-term monitoring well; above realized to soil pollution place stability, high accuracy, efficient risk management and control.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic top view of a three-dimensional risk management and control system for a soil polluted site provided by an embodiment of the present invention;
fig. 2 is a schematic sectional view of a three-dimensional risk management and control system for a soil pollution site provided by an embodiment of the present invention;
fig. 3 is a schematic view illustrating the composition of a surface-covered impermeable layer according to an embodiment of the present invention.
The reference numbers illustrate: 1-lower water barrier; 2-a vertical barrier layer; 3-covering the surface layer with an impermeable layer; 4-underground water long-term monitoring well; 5-soil pollution risk management and control site; 31-concrete cushion; 32-barrier layer; 321-non-woven geotextile protective layer; 322-HDPE film barrier layers; 33-reinforced concrete layer.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 is the embodiment of the utility model provides a three-dimensional risk management and control system in soil pollution place constitutes and overlooks the schematic diagram, fig. 2 is the utility model discloses a three-dimensional risk management and control system in soil pollution place constitutes and cuts up the schematic diagram, fig. 3 is the utility model provides a surface layer covers barrier layer and constitutes the schematic diagram, it is right to combine fig. 1 ~ 3 below the utility model provides a three-dimensional risk management and control system in soil pollution place carries out detailed explanation.
As shown in fig. 1 and 2, the three-dimensional risk management and control system of the soil pollution site mainly comprises: a lower water-resisting layer 1, a vertical blocking layer 2, a surface covering impervious layer 3 and a groundwater long-term monitoring well 4.
Specifically, the lower water-resisting layer 1 is a foundation layer which is naturally and continuously distributed below the soil pollution risk control field 5, the foundation layer which is naturally and continuously distributed is set above the soil pollution risk control field 5, the geological characteristics of the pollution field can be fully utilized, and the input cost is reduced and the stability of the system is increased.
The vertical barrier layer 2 forms a closed structure to isolate the soil pollution risk management and control field 5 inside. As a preferred implementation manner of the embodiment of the application, the vertical barrier layer 2 is a cement mixing pile diaphragm wall; more preferably, the lower end of the vertical barrier layer 2 is embedded into the lower water barrier layer 1; the pile center distance of the cement mixing pile cut-off wall is 10-30 cm, the diameter of the pile is 0.3-1 m, and the depth is 10-15mAnd the depth of the water-resisting layer 1 embedded into the bedrock layer below is 0.5-1 m. In the embodiment of the application, the permeability coefficient of the cement mixing pile cut-off wall is less than 10-7The construction method of the impervious wall of the cement mixing pile adopts a single-row jet grouting pile waterproof curtain construction process, and the seepage wall of the cement mixing pile is manufactured by expanding 1-3 m to the periphery of the pollution range due to the migration of pollutants in soil. The construction process of the cement mixing pile diaphragm wall is that before the drilling machine enters the field for construction, a GPS is used for setting off according to a construction organization design according to a reference point, after the drilling machine moves to a preset position, the diameter of a drill bit needs to be checked, pile position deviation and verticality are strictly controlled, common silicate cement with the compressive strength of 42.5MPa is used as the cement, the water cement ratio of cement slurry mixed on site is controlled to be 0.8-1.0, the mixing sinking speed of the drill bit is less than 1m/min during drilling operation of the drilling machine, when the drilling machine drills to a designed pile bottom elevation, reverse lifting is carried out when grouting is started and the cement mixing amount is less than 0.5m/min, and the cement mixing amount is ensured to be 230 kg/m. When the drill bit is lifted to the designed elevation, the drill rod is lifted after the top end of the cement mixing pile is fully mixed for 30s, the spraying is stopped after the drill bit is lifted to the height which is 0.5m higher than the designed elevation of the pile top, and the grouting is performed again until the height is 0.5m higher than the designed elevation after the drill bit is re-mixed to the elevation of the pile bottom.
As shown in fig. 2 and 3, the surface covering impermeable layer 3 is built above the soil pollution risk management and control site 5 and the vertical barrier layer 2, and the surface covering impermeable layer 3 is sequentially a concrete cushion layer 31, an impermeable layer 32 and a reinforced concrete layer 33 from bottom to top. As a preferred embodiment of the present application, the impermeable layer 32 comprises a nonwoven geotextile protective layer 321, an HDPE membrane impermeable layer 322, and a nonwoven geotextile protective layer 321 from bottom to top. In the embodiment of the application, the first layer is the concrete cushion 31, and the C20 concrete cushion 31 with the thickness of 10cm is adopted; the second layer is an impermeable layer 32, which comprises two non-woven geotextile protective layers 321 and a 2.0mm HDPE film impermeable layer 322, and the HDPE film impermeable layer 322 is welded by a double seam heat sealing welding machine; the third layer is a reinforced concrete layer 33, a C30 reinforced concrete raft of 20cm is adopted, and the phi 12 thread steel is bidirectional. In addition, a customized 15 cm-height channel steel is adopted as a side mold before the concrete cushion 31 is poured, the template is flat, straight and smooth, the elevation of the template is referenced to a road arch transverse slope, the template is firmly and tightly connected, and the seam width is not more than 2 mm.
As shown in fig. 1, the groundwater long-term monitoring wells 4 are arranged in different directions or in the soil pollution risk management and control site 5. As a preferred embodiment of the present embodiment, the groundwater long term monitoring well 4 is drilled above the underlying water barrier 1. In this application embodiment, including six groundwater long-term monitoring wells 4, four of them are established respectively in four directions of perpendicular barrier layer 2, and 2 mouthful set up respectively in soil pollution risk management and control place 5. The selection of 4 construction figure and positions of specific groundwater long-term monitoring well can be according to the size, the pollution degree of risk management and control scope, landform complexity etc. and set for, for example, the size of risk management and control scope is great, the pollution degree is darker, can be appropriate when the landform is more complicated increase the figure of 4 groundwater long-term monitoring wells to corresponding adjustment construction position, in order to guarantee that groundwater can all be monitored in whole risk management and control scope, reach not omitting, unrepeated purpose.
The utility model provides a three-dimensional risk management and control system in soil pollution place can effectively obstruct the diffusion of pollutant in the soil, and the basement rock layer through the natural continuous distribution that pollutes the soil lower part, cement mixing stake cut-off wall on the vertical direction and the top layer that pollutes soil cover barrier 3 keep apart the pollutant, make the pollutant separation be in the utility model discloses an inside three-dimensional risk management and control system, prevent simultaneously effectively that liquid such as external surface water, groundwater from getting into three-dimensional risk management and control system through the separation body inside, also avoid the internal pollution factor of separation to get into pollution-free region through the separation body simultaneously to can avoid polluting the problem of diffusion, area of pollution increase.
The utility model discloses a three-dimensional risk management and control system in soil pollution place is normal position management and control measure, does not relate to the excavation and the transportation that pollute soil, has avoided polluting the safe risk that produces in soil excavation and the transportation and the secondary pollution risk that causes.
The three-dimensional risk management and control system for the soil pollution site has lower treatment cost on large-area polluted soil, only needs to build the vertical barrier layer 2 and the surface layer covering impermeable layer 3 around the polluted soil once, combines the monitoring of long-term underground water, and saves a large amount of funds compared with ex-situ remediation of the polluted soil; the method is suitable for the polluted plots with deeper pollution depth, larger pollution range, higher restoration cost and lower economic utilization benefit after restoration.
Since the above embodiments are all described by referring to and combining with other embodiments, the same portions are provided between different embodiments, and the same and similar portions between the various embodiments in this specification may be referred to each other. And will not be described in detail herein.
It should be noted that, unless otherwise specified and limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, mechanically or electrically connected, or may be communicated between two elements, directly or indirectly through an intermediate medium, and specific meanings of the terms may be understood by those skilled in the relevant art according to specific situations. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or device comprising the element. In the description of the present invention, it is to be understood that the terms "above", "bottom", "inside", "top", "middle", "other end", "upper", "one side", "top", "inside", "front", "center", "both ends", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (6)
1. The utility model provides a three-dimensional risk management and control system in soil pollution place which characterized in that includes: a lower water-resisting layer (1), a vertical blocking layer (2), a surface covering impervious layer (3), a long-term underground water monitoring well (4) and a soil pollution risk management and control site (5);
the lower waterproof layer (1) is a foundation layer which is continuously distributed below the soil pollution risk control site (5);
the vertical barrier layer (2) forms a closed structure to isolate the soil pollution risk control site (5) inside;
the surface covering impermeable layer (3) is built above the soil pollution risk management and control site (5) and the vertical barrier layer (2), and the surface covering impermeable layer (3) sequentially comprises a concrete cushion layer (31), an impermeable layer (32) and a reinforced concrete layer (33) from bottom to top;
the underground water long-term monitoring wells (4) are distributed inside the soil pollution risk management and control site (5).
2. The three-dimensional risk management and control system for the soil pollution site according to claim 1, wherein the vertical barrier layer (2) is a cement mixing pile diaphragm wall.
3. The soil contaminated site stereoscopic risk management and control system according to claim 2, wherein the lower end of the vertical barrier layer (2) is embedded in the lower water barrier layer (1).
4. The soil pollution site three-dimensional risk management and control system according to claim 3, wherein the distance between the centers of the cement mixing pile cut-off walls is 20cm, the diameter of the pile is 0.5m, the depth of the pile is 10-15m, and the depth of the cement mixing pile cut-off walls embedded in the lower waterproof layer is 0.5-1 m.
5. The soil contaminated site three-dimensional risk management and control system according to claim 1, wherein the impermeable layer (32) is a non-woven geotextile protective layer (321), an HDPE membrane impermeable layer (322), and a non-woven geotextile protective layer (321) from bottom to top.
6. The soil contamination site stereoscopic risk management and control system according to claim 1, wherein the groundwater long term monitoring well (4) is drilled above the lower water barrier (1).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232590A (en) * | 2021-12-20 | 2022-03-25 | 上海毅同环境技术有限公司 | Risk control method for hexavalent chromium polluted land by combining vertical partition wall and modified microbial complexing agent |
| CN116562654A (en) * | 2023-07-04 | 2023-08-08 | 广州市第一市政工程有限公司 | Land development and construction planning method based on soil environment restoration and protection |
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2021
- 2021-01-13 CN CN202120083546.3U patent/CN214253279U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232590A (en) * | 2021-12-20 | 2022-03-25 | 上海毅同环境技术有限公司 | Risk control method for hexavalent chromium polluted land by combining vertical partition wall and modified microbial complexing agent |
| CN116562654A (en) * | 2023-07-04 | 2023-08-08 | 广州市第一市政工程有限公司 | Land development and construction planning method based on soil environment restoration and protection |
| CN116562654B (en) * | 2023-07-04 | 2024-03-29 | 广州市第一市政工程有限公司 | Land development and construction planning method based on soil environment restoration and protection |
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