CN115318811A - Method for utilizing polluted land blocks - Google Patents
Method for utilizing polluted land blocks Download PDFInfo
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- CN115318811A CN115318811A CN202210960051.3A CN202210960051A CN115318811A CN 115318811 A CN115318811 A CN 115318811A CN 202210960051 A CN202210960051 A CN 202210960051A CN 115318811 A CN115318811 A CN 115318811A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
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Abstract
The invention discloses a contaminated land block utilization method, which comprises the steps of dividing a contaminated land block into a contaminated soil area and a clean soil area, moving contaminated soil in a wide and thin contaminated soil area and contaminated soil in a narrow and thin contaminated soil area to the wide and thick contaminated soil area, moving part of the contaminated soil in the narrow and thick contaminated soil area to the wide and thick contaminated soil area to form a contaminated soil accumulation area, forming an available space by the wide and thin contaminated soil area, the narrow and thin contaminated soil area and the narrow and thick contaminated soil area from which the contaminated soil is moved, and finally arranging a blocking structure around the contaminated soil accumulation area. The method gathers the polluted soil in the polluted soil land blocks together by a local moving and allocating method, the polluted soil does not need to be transferred in a long distance, a storage field after the polluted soil is transferred does not need to be arranged additionally, the implementation difficulty is low, the implementation cost is low, and secondary pollution is not easy to cause.
Description
Technical Field
The invention relates to the technical field of polluted land treatment, in particular to a method for utilizing polluted land blocks.
Background
In recent years, the urbanization rate of China keeps increasing at a high speed, and cities need more land supply urgently. Urban land obtained by urban layout adjustment and industrial structure upgrading replacement is an important new land supply source for cities, the land blocks are generally high in development value, but the moved and left fields of industrial enterprises often have heavy metal pollution, so that human health is greatly threatened, and soil remediation is required. The main points of the treatment of the heavy metal contaminated soil are fixation and isolation, and the traditional treatment method of the heavy metal contaminated soil usually adopts the following two treatment modes: one is to adopt methods such as cement kiln co-processing, chemical leaching, curing/stabilizing and the like for processing, and then to carry out landfill, however, the processing method has great influence on the surrounding environment and is not suitable for being used in urban and other dense areas; the other type is dredging and outward transportation, the method has the advantages that the underground space is not influenced by polluted soil distribution, however, the method has the defects of complex implementation, high cost, secondary pollution caused by remote disposal, high management and control risk and the like.
Disclosure of Invention
In view of the above, there is a need for a method for recycling contaminated land pieces, which can recycle contaminated land pieces simply at low cost and without causing secondary pollution.
The application provides a method for utilizing a polluted soil plot, which comprises the following steps:
detecting the accumulation condition of pollutants in a polluted land block, and dividing the polluted land block into at least two polluted soil areas and at least two clean soil areas according to the accumulation condition of the pollutants in the polluted land block;
identifying the polluted soil area with the depth larger than a first preset value as a thick polluted soil area, and identifying the polluted soil area with the depth smaller than the first preset value as a thin polluted soil area; regarding the depth direction of the polluted soil plot as a projection direction, regarding the polluted soil area with the projection area larger than a second preset value as a wide polluted soil area, and regarding the polluted soil area with the projection area smaller than the second preset value as a narrow polluted soil area;
moving the polluted soil of the wide and thin polluted soil area and the polluted soil of the narrow and thin polluted soil area to the wide and thick polluted soil area, and moving the polluted soil of the narrow and thick polluted soil area within a first preset depth range to the wide and thick polluted soil area, so that the wide and thin polluted soil area, the narrow and thin polluted soil area and the narrow and thick polluted soil area are free of polluted soil at the parts within the first preset depth range to form usable spaces, and the wide and thick polluted soil area and the narrow and thick polluted soil area form a polluted soil accumulation area at the parts outside the first preset depth range;
and arranging a barrier structure outside the polluted soil accumulation area to isolate the polluted soil accumulation area.
In the method for utilizing the polluted soil block, the polluted soil block is divided into a polluted soil area and a clean soil area by detecting pollutants in the polluted soil block, the polluted soil area is further classified according to the size of the polluted soil area, so that all the polluted soil in the wide, thin, narrow and thin polluted soil area is moved to the wide and thick polluted soil area, the polluted soil in the first preset depth range of the narrow and thick polluted soil area is moved to the wide and thick polluted soil area, the wide, thin polluted soil area, the narrow and thin polluted soil area and the narrow and thick polluted soil area are free of polluted soil in the first preset depth range to form an available space, the wide, thick polluted soil area and the narrow and thick polluted soil area form a polluted soil gathering area outside the first preset depth range, and the clean soil in the clean soil area can be applied to the available space to build buildings such as civil defense engineering, underground garages and the like, so that the polluted soil block can be reused; for the polluted soil accumulation area, a blocking structure is arranged on the outer side of the polluted soil accumulation area to isolate the polluted soil accumulation area, so that buildings such as civil air defense projects and underground garages in the available space are protected from being polluted by the polluted soil. Therefore, the polluted soil plot utilization method gathers the polluted soil in the polluted soil plot by a method of local moving and blending the polluted soil, the polluted soil does not need to be transferred in a long distance, a storage site for the polluted soil after being transferred is not required to be arranged additionally, the implementation difficulty is low, the implementation cost is low, and secondary pollution is not easy to cause; and an available space can be formed for building buildings such as civil air defense engineering, underground garages and the like, and the recycling of the polluted soil plots is realized.
The technical scheme of the application is further explained as follows:
in one embodiment, after the steps of detecting the accumulation condition of the pollutants in the polluted land block and dividing the polluted land block into at least two polluted soil areas and at least two clean soil areas according to the accumulation condition of the pollutants in the polluted land block, the method further comprises the following steps:
and detecting the pollutant types in each polluted soil area, and when at least two pollutant types exist in the polluted soil area, further dividing the polluted soil area into a first type polluted soil subarea, a second type polluted soil subarea, a 8230; an 8230; and an nth type polluted soil subarea, wherein n is more than or equal to 2.
In one embodiment, the method for manufacturing the soil conditioner comprises the steps of moving polluted soil of the wide and thin polluted soil area and polluted soil of the narrow and thin polluted soil area to the wide and thick polluted soil area, and moving polluted soil of the narrow and thick polluted soil area within a first preset depth range to the wide and thick polluted soil area, so that the wide and thin polluted soil area, the narrow and thin polluted soil area and the narrow and thick polluted soil area are free of polluted soil in a part within the first preset depth range to form usable space, and the wide and thick polluted soil area and the narrow and thick polluted soil area form a polluted soil gathering area in a part outside the first preset depth range:
moving the polluted soil in the wide and thin first-class polluted soil subarea of the polluted soil area and the polluted soil in the narrow and thin first-class polluted soil subarea of the polluted soil area to the wide and thick first-class polluted soil subarea of the polluted soil area, and moving the polluted soil in the narrow and thick first-class polluted soil subarea of the polluted soil area within the first preset depth range to the wide and thick first-class polluted soil subarea of the polluted soil area;
moving polluted soil in a second type polluted soil subarea of the wide and thin polluted soil area and polluted soil in a second type polluted soil subarea of the narrow and thin polluted soil area to a second type polluted soil subarea of the wide and thick polluted soil area, and moving the polluted soil of the second type polluted soil subarea of the narrow and thick polluted soil area in the first preset depth range to the second type polluted soil subarea of the wide and thick polluted soil area;
and by analogy, moving the polluted soil in the nth polluted soil partition of the wide and thin polluted soil area and the polluted soil in the nth polluted soil partition of the narrow and thin polluted soil area to the nth polluted soil partition of the wide and thick polluted soil area, and moving the polluted soil of the nth polluted soil partition of the narrow and thick polluted soil area in the first preset depth range to the nth polluted soil partition of the wide and thick polluted soil area.
In one embodiment, before the step of moving the contaminated soil of the wide and thin contaminated soil area and the contaminated soil of the narrow and thin contaminated soil area to the wide and thick contaminated soil area and moving the contaminated soil of the narrow and thick contaminated soil area within the first preset depth range to the wide and thick contaminated soil area, so that the wide and thin contaminated soil area, the narrow and thin contaminated soil area and the narrow and thick contaminated soil area are free of contaminated soil at a part within the first preset depth range to form an available space, and the wide and thick contaminated soil area and the narrow and thick contaminated soil area form a contaminated soil accumulation area at a part outside the first preset depth range, the method further comprises the following steps:
dividing the polluted soil plot into a non-utilization area, a local utilization area and a full utilization area according to the use requirement of a land construction scheme on the polluted soil plot;
and planning the wide and thick polluted soil area as a non-utilization area, planning the wide and thin polluted soil area and the narrow and thin polluted soil area as all-utilization areas, and planning the narrow and thick polluted soil area as a local utilization area.
In one embodiment, the step of providing a barrier structure outside the contaminated soil accumulation zone to isolate the contaminated soil accumulation zone comprises the steps of:
the method comprises the following steps that an external blocking wall is arranged on the circumferential outer side of the polluted land block boundary, the external blocking wall and the polluted land block boundary are arranged at intervals, a waterproof layer is formed on the side face of the external blocking wall, the depth of the external blocking wall is in a second preset depth range, so that the root of the external blocking wall can be embedded into a waterproof layer of an underground soil body, and the external blocking wall is a part of a blocking structure.
In one embodiment, the step of arranging an outer barrier wall at the circumferential outer side of the contaminated land boundary, the outer barrier wall being spaced apart from the contaminated land boundary, the outer barrier wall having a waterproof layer formed on the side surface thereof, the outer barrier wall having a depth within a second predetermined depth range so that the root of the outer barrier wall can be embedded in the waterproof layer of the underground soil, the outer barrier wall being a part of the barrier structure, comprises the steps of:
cement is sprayed into soil bodies arranged at intervals on the outer sides of the periphery of the polluted land block boundary and is stirred with the soil bodies, so that the cement and the soil bodies react to form cement stirring pile walls, the thickness of the cement stirring pile walls is within a first preset thickness range so that the side surfaces of the cement stirring pile walls can form a waterproof layer, the depth of the cement stirring pile walls is within a second preset depth range so that the roots of the cement stirring pile walls can be embedded into a waterproof layer of underground soil bodies, and the cement stirring pile walls are part of the external barrier walls.
In one embodiment, the step of providing a barrier structure outside the contaminated soil accumulation zone to isolate the contaminated soil accumulation zone comprises the steps of:
and constructing an inner barrier layer at the bottom and the circumferential outer side of the available space to isolate the available space from the polluted soil accumulation area.
In one embodiment, the step of providing a barrier structure outside the contaminated soil accumulation zone to isolate the contaminated soil accumulation zone comprises the steps of:
the inner barrier layer with it is provided with the connection barrier layer to connect between the outside barrier wall, the connection barrier layer does a part of separation structure, the connection barrier layer the inner barrier layer outside barrier wall be used for with the impervious barrier of the underground soil body encloses to close and forms the closed space with sealed pollute soil and gather the district.
In one embodiment, the step of detecting the accumulation of pollutants in the polluted land block and dividing the polluted land block into at least two polluted soil areas and at least two clean soil areas according to the accumulation of pollutants in the polluted land block comprises the following steps:
and detecting the pollutant accumulation condition in the polluted land block by using a pollutant detector.
In one embodiment, when the polluted soil area with the depth greater than a first preset value is regarded as the thick polluted soil area, the polluted soil area with the depth less than the first preset value is regarded as the thin polluted soil area; the method comprises the following steps of taking the depth direction of the polluted soil plot as the projection direction, identifying the polluted soil area with the projection area larger than a second preset value as a wide polluted soil area, and identifying the polluted soil area with the projection area smaller than the second preset value as a narrow polluted soil area:
setting the first preset value as one half of the total depth of the polluted soil plot; and setting the second preset value as one half of the total projection area of the polluted soil plot in the depth direction of the polluted soil plot.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 based on these drawings without creative efforts.
FIG. 1 illustrates the operational steps of a contaminated land mass utilization method according to one embodiment of the present invention;
FIG. 2 illustrates the operational steps of a method for utilizing contaminated land pieces in accordance with one embodiment of the present invention;
FIG. 3 is one of the steps of a contaminated land area utilization method according to one embodiment of the present invention, and is a cross-sectional view of a contaminated land area in the depth direction;
FIG. 4 is one of the steps of a contaminated land reclamation method according to one embodiment of the invention, and is a cross-sectional view of a contaminated land in the depth direction;
FIG. 5 is one of the steps of a contaminated land area utilization method according to one embodiment of the present invention, and is a cross-sectional view of a contaminated land area taken along the depth direction;
FIG. 6 is one of the steps of a contaminated land reclamation method according to one embodiment of the invention, and is a cross-sectional view of a contaminated land in the depth direction;
fig. 7 is a top view of the contaminated soil block of fig. 6.
Description of reference numerals:
10. contaminated soil plots; 100. a contaminated soil area; 110. partitioning the first kind of polluted soil; 120. partitioning the second type of polluted soil; 200. a clean soil area; 300. space is available; 400. a contaminated soil accumulation zone; 500. a barrier structure; 510. an inner barrier layer; 511. a bottom barrier panel; 512. a side blocking wall; 520. an outer barrier wall; 530. connecting the barrier layers; 540. a closed space; 600. polluting the boundary of the land block; 20. a impervious bed of underground soil.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
An embodiment of a method for utilizing contaminated soil blocks, please refer to fig. 1 to 6, includes the following steps:
s1, referring to FIG. 3, detecting the accumulation condition of pollutants in a polluted soil plot 10, and dividing the polluted soil plot 10 into at least two polluted soil areas 100 and at least two clean soil areas 200 according to the accumulation condition of the pollutants in the polluted soil plot 10;
s2, referring to FIG. 4, regarding the polluted soil area 100 with the depth (the depth direction is referred to the direction H shown in FIG. 4) larger than the first preset value as a thick polluted soil area 100, and regarding the polluted soil area 100 with the depth smaller than the first preset value as a thin polluted soil area 100; regarding the depth direction (for example, the H direction in fig. 4) of the contaminated soil block 10 as the projection direction, the contaminated soil area 100 having a projection area larger than the second preset value is identified as a wide contaminated soil area 100, and the contaminated soil area 100 having a projection area smaller than the second preset value is identified as a narrow contaminated soil area 100;
s3, referring to FIG. 5, moving the contaminated soil in the wide and thin contaminated soil area 100 and the contaminated soil in the narrow and thin contaminated soil area 100 to the wide and thick contaminated soil area 100, and moving the contaminated soil in the first preset depth range of the narrow and thick contaminated soil area 100 to the wide and thick contaminated soil area 100, so that the wide and thin contaminated soil area 100, the narrow and thin contaminated soil area 100 and the narrow and thick contaminated soil area 100 are free of contaminated soil in the first preset depth range to form an available space 300, and the wide and thick contaminated soil area 100 and the narrow and thick contaminated soil area 100 are formed into a contaminated soil accumulation area 400 outside the first preset depth range;
s4, referring to FIG. 6, a barrier structure 500 is disposed outside the contaminated soil accumulation area 400 to isolate the contaminated soil accumulation area 400.
In the contaminated land block utilization method, the contaminated land block 10 is divided into a contaminated soil area 100 and a clean soil area 200 by performing contaminant detection on the contaminated land block 10, the contaminated soil is further classified according to the size of the contaminated soil area 100, so that all the contaminated soil in the wide, thin, narrow and thin contaminated soil area 100 is moved to the wide and thick contaminated soil area 100, the contaminated soil in the first preset depth range of the narrow and thick contaminated soil area 100 is moved to the wide and thick contaminated soil area 100, so that the portions of the wide, thin contaminated soil area 100, the narrow, thin contaminated soil area 100 and the narrow and thick contaminated soil area 100 in the first preset depth range are free of contaminated soil to form an available space 300, the portions of the wide, thick contaminated soil area 100 and the narrow, thick contaminated soil area 100 outside the first preset depth range form a contaminated soil accumulation area 400, and the clean soil in the clean soil area 200 can be applied to the available space 300 to build buildings such as civil engineering, underground and the like, so as to realize the reuse of the contaminated land block 10; for the contaminated soil accumulation area 400, the blocking structure 500 is disposed outside the contaminated soil accumulation area 400 to isolate the contaminated soil accumulation area 400, so as to protect buildings such as civil air defense projects and underground garages in the available space 300 from being contaminated by the contaminated soil. Therefore, the polluted soil plot utilization method gathers the polluted soil in the polluted soil plot 10 together by a method of local moving and blending the polluted soil, the polluted soil does not need to be transported in a long distance, a storage site after the polluted soil is transported does not need to be arranged additionally, the implementation difficulty is low, the implementation cost is low, and secondary pollution is not easy to cause; and an available space 300 can be formed for constructing buildings such as civil air defense engineering, underground garages and the like, thereby realizing the reuse of the contaminated soil plot 10.
It will be readily appreciated that the contaminated soil area 100 is a section of the contaminated soil block 10 having contaminants therein, and the clean soil area 200 is a section of the contaminated soil block 10 having no contaminants therein.
Specifically, the contaminated soil in the first predetermined depth range of the narrow and thick contaminated soil area 100 is the surface contaminated soil of the narrow and thick contaminated soil area 100, and the contaminated soil in the narrow and thick contaminated soil area 100 outside the first predetermined depth range is the deep contaminated soil of the narrow and thick contaminated soil area 100.
Alternatively, the contaminated soil of the wide and thin contaminated soil area 100 and the contaminated soil of the narrow and thin contaminated soil area 100 may be stacked above the wide and thick contaminated soil area 100, and the contaminated soil within the first predetermined depth range of the narrow and thick contaminated soil area 100 may be stacked above the wide and thick contaminated soil area 100.
In some embodiments, referring to fig. 3, after the steps of detecting the accumulation of the pollutants in the contaminated soil block 10, and dividing the contaminated soil block 10 into at least two contaminated soil areas 100 and at least two clean soil areas 200 according to the accumulation of the pollutants in the contaminated soil block 10, the method further includes the following steps:
and detecting the pollutant types in each polluted soil area 100, and when at least two pollutant types exist in the polluted soil area 100, further dividing the polluted soil area 100 into a first type polluted soil subarea 110, a second type polluted soil subarea 120, 8230, an nth type polluted soil subarea (not shown), wherein n is more than or equal to 2, according to the aggregation condition of each pollutant type. When at least two types of pollutants exist in the polluted soil plot 10, the polluted soil area 100 is further divided into a first type polluted soil subarea 110, a second type polluted soil subarea 120, 8230, a 8230and an nth type polluted soil subarea, and the purpose of classifying and processing the various types of pollutants is to avoid mutual reaction among different types of pollutants in subsequent operation to enlarge a pollution range or make a pollution situation more complicated.
Optionally, the method for dividing the contaminated soil area 100 may be classified according to the types of the heavy metal pollutants, for example, may be classified into a mercury heavy metal contaminated soil partition, a lead heavy metal contaminated soil partition, a chromium heavy metal contaminated soil partition, and the like, and may also be classified according to the types of the organic pollutants, and the specific classification method is determined according to the types of the pollutants existing in the contaminated soil area 100.
It is easy to understand that, in the actual operation process, according to the accumulation condition of the pollutants in the polluted soil area 100, at least two first type polluted soil subareas 110 may be provided, at least two second type polluted soil subareas 120 may be provided, and so on, at least two nth type polluted soil subareas may be provided, and the setting number of the various types of polluted soil subareas such as the first type polluted soil subarea 110, the second type polluted soil subarea 120, and so on is determined according to the pollutant type condition of the actual polluted soil block 10.
Optionally, in one embodiment, referring to fig. 3, the number of the detected pollutant types in the polluted soil block 10 is two, and the polluted soil block 10 is divided into at least one first type polluted soil partition 110 and at least one second type polluted soil partition 120.
In some embodiments, referring to fig. 3 to 5, the steps of moving the contaminated soil in the wide and thin contaminated soil area 100 and the contaminated soil in the narrow and thin contaminated soil area 100 to the wide and thick contaminated soil area 100, and moving the contaminated soil in the first predetermined depth range of the narrow and thick contaminated soil area 100 to the wide and thick contaminated soil area 100, so that the wide and thin contaminated soil area 100, the narrow and thin contaminated soil area 100 and the narrow and thick contaminated soil area 100 are free of contaminated soil in the first predetermined depth range to form the usable space 300, and the wide and thick contaminated soil area 100 and the narrow and thick contaminated soil area 100 form the contaminated soil accumulation area 400 in the portion outside the first predetermined depth range include the following steps:
moving the contaminated soil in the first contaminated soil sub-area 110 of the wide and thin contaminated soil area 100 and the contaminated soil in the first contaminated soil sub-area 110 of the narrow and thin contaminated soil area 100 to the first contaminated soil sub-area 110 of the wide and thick contaminated soil area 100, and moving the contaminated soil of the first contaminated soil sub-area 110 of the narrow and thick contaminated soil area 100 within a first preset depth range to the first contaminated soil sub-area 110 of the wide and thick contaminated soil area 100;
moving the contaminated soil in the second contaminated soil sub-zone 120 of the wide and thin contaminated soil area 100 and the contaminated soil in the second contaminated soil sub-zone 120 of the narrow and thin contaminated soil area 100 to the second contaminated soil sub-zone 120 of the wide and thick contaminated soil area 100, and moving the contaminated soil of the second contaminated soil sub-zone 120 of the narrow and thick contaminated soil area 100 within a first preset depth range to the second contaminated soil sub-zone 120 of the wide and thick contaminated soil area 100;
by analogy, the contaminated soil in the nth contaminated soil partition of the wide and thin contaminated soil area 100 and the contaminated soil in the nth contaminated soil partition of the narrow and thin contaminated soil area 100 are both moved to the nth contaminated soil partition of the wide and thick contaminated soil area 100, and the contaminated soil in the nth contaminated soil partition of the narrow and thick contaminated soil area 100 within the first preset depth range is moved to the nth contaminated soil partition of the wide and thick contaminated soil area 100. Thus, the different types of contaminated soil in the wide, thin, narrow, thin, and narrow and thick contaminated soil area 100 are respectively moved to the same type of contaminated soil in the wide and thick contaminated soil area 100, so that the various types of contaminated soil are gathered in different types, and the pollution range is prevented from being enlarged or the pollution degree is increased or the pollution condition is prevented from being more complicated due to the fact that the different types of contaminants are mixed or react with each other.
It should be noted that, in the present technical field, all kinds of pollutants are generally present in the wide and thick polluted soil area 100, and therefore, the first-type polluted soil sub-area 110, the second-type polluted soil sub-area 120, 8230, the 8230, and the n-type polluted soil sub-area can be divided in the wide and thick polluted soil area 100, and thus, all kinds of polluted soils in the wide and thin polluted soil area 100, the narrow and thin polluted soil area 100, and the narrow and thick polluted soil area 100 can be moved to the same-type polluted soil area 100 in the wide and thick polluted soil area 100 in a one-to-one correspondence manner, thereby gathering all kinds of polluted soils in different categories and avoiding the pollution range or the pollution severity caused by the reaction of different kinds of polluted soils.
In some embodiments, referring to fig. 4, before the steps of moving the contaminated soil in the wide and thin contaminated soil area 100 and the contaminated soil in the narrow and thin contaminated soil area 100 to the wide and thick contaminated soil area 100, and moving the contaminated soil in the first predetermined depth range of the narrow and thick contaminated soil area 100 to the wide and thick contaminated soil area 100, so that the wide and thin contaminated soil area 100, the narrow and thin contaminated soil area 100, and the narrow and thick contaminated soil area 100 are free of contaminated soil in the first predetermined depth range to form the usable space 300, and the wide and thick contaminated soil area 100 and the narrow and thick contaminated soil area 100 are formed as the contaminated soil accumulation area 400 in the portion outside the first predetermined depth range, the steps further include:
according to the use requirements of the land construction scheme on the polluted soil plots 10, dividing the polluted soil plots 10 into a non-utilization area, a local utilization area and a total utilization area;
the wide and thick contaminated soil area 100 is planned as a non-use area, the wide and thin contaminated soil area 100, the narrow and thin contaminated soil area 100 are planned as a total use area, and the narrow and thick contaminated soil area 100 is planned as a partial use area. Thus, the construction requirements are combined with site conditions, the polluted soil plots 10 are recycled according to the characteristics of the polluted soil areas 100, the utilization rate of the polluted soil plots 10 can be maximized, and the mode of 'environmental remediation + development construction' encouraged in the 'guidance opinions about the construction of modern environmental management systems' at present is better met. Specifically, since the polluted soil in the wide and thick polluted soil area 100 is distributed deeply and in a large amount, and is difficult to move, which results in high moving cost, the polluted soil area is planned as a non-utilization area, and the polluted soil is not subjected to moving treatment; in the wide and thin contaminated soil area 100 and the narrow and thin contaminated soil area 100, since the contaminated soil is distributed shallowly, is easily moved and has low moving cost, the wide and thin contaminated soil and the narrow and thin contaminated soil can be moved to other places, thereby completely utilizing the wide, thin, narrow and thin contaminated soil area 100 and maximizing the usable area of the contaminated soil block 10; although the amount of the contaminated soil in the narrow and thick contaminated soil area 100 is small, the contaminated soil is distributed deeply and is moved with a moderate difficulty, the contaminated soil within the first preset depth range can be moved to the wide and thick contaminated soil area 100 to utilize a part of the space, and the contaminated soil outside the first preset depth range is retained at the original position to reduce the moving cost of the soil, so that the narrow and thick contaminated soil area 100 is planned to be a local utilization area, the utilization rate of the contaminated soil block 10 can be maximized at a low cost, the use requirement of a land construction scheme on the contaminated soil block 10 is met, and the contaminated soil block 10 is fully utilized.
Optionally, the local utilization area and the total utilization area can be used as underground spaces such as civil air defense projects and parking lots to meet construction requirements such as civil air defense and parking.
As will be readily understood, the available space 300 includes a partial utilization region and a full utilization region.
In some embodiments, referring to fig. 6 and 7, the step of providing a barrier structure 500 outside the contaminated soil accumulation zone 400 to isolate the contaminated soil accumulation zone 400 comprises the steps of:
an inner barrier 510 is built at the bottom of the available space 300 and outside in the circumferential direction to isolate the available space 300 from the contaminated soil accumulation zone 400. Thus, the inner partition 510 is disposed at the bottom and the circumferential outer side of the usable space 300, and may be used to partition the inside of the usable space 300 from the contaminated soil gathering area 400, and may also be used as a building structure such as a floor, a wall, etc. of a building in the usable space 300, so as to reduce the amount of construction materials and save the utilization cost of the contaminated soil block 10.
Alternatively, referring to fig. 6 and 7, a bottom partition plate 511 is formed at the bottom of the available space 300, and side partition walls 512 are formed at the sides of the available space 300, wherein an end of the side partition wall 512 adjacent to the bottom partition plate 511 and an end of the bottom partition plate 511 adjacent to the side partition wall 512 are connected to each other to form an inner partition 510.
Specifically, when the space 300 is available as a basement, the bottom blocking plate 511 may be a floor of the basement, and the side blocking walls 512 may be side walls disposed along the circumferential direction of the basement, and the floor of the basement is connected to the side walls of the basement.
Preferably, the bottom barrier plate 511 may be a cement barrier plate or a concrete barrier plate, the side barrier wall 512 may be a cement barrier wall or a concrete barrier wall, and the bottom barrier plate 511 is within the second predetermined thickness range, and the wall thickness of the side barrier wall 512 is within the third predetermined thickness range, so that the inner barrier layer 510 after the bottom barrier plate 511 and the side barrier wall 512 are connected has a certain waterproof performance, and meets the requirement of blocking contaminated soil.
In some embodiments, referring to fig. 6 and 7, the step of providing a barrier structure 500 outside the contaminated soil accumulation area 400 to isolate the contaminated soil accumulation area 400 includes the steps of:
an outer blocking wall 520 is arranged on the circumferential outer side of the contaminated land boundary 600, the outer blocking wall 520 and the contaminated land boundary 600 are arranged at intervals, a waterproof layer (not shown) is formed on the side surface of the outer blocking wall 520, the depth of the outer blocking wall 520 is within a second preset depth range so that the root of the outer blocking wall 520 can be embedded into the waterproof layer 20 of the underground soil body, and the outer blocking wall 520 is a part of the blocking structure 500. Thus, the outer portion of the contaminated soil block 10 is surrounded by the outer blocking wall 520, and the outer blocking wall 520 is used for preventing the contaminants in the contaminated soil block 10 from polluting the clean soil outside the contaminated soil block 10; a waterproof layer (not shown) is formed on the side surface of the outer barrier wall 520, so that the waterproof layer exists between the contaminated land block boundary 600 and the outer barrier wall 520, which is beneficial to preventing the liquid carrying the contaminants in the contaminated land block 10 from penetrating into the outer barrier wall 520 and then entering into the clean soil outside the contaminated land block 10; the depth of the external blocking wall 520 is within a second preset depth range so that the root of the external blocking wall 520 can be embedded into the impervious layer 20 of the underground soil body, and by means of the impermeability of the impervious layer 20 of the underground soil body, pollutants in the polluted soil block 10 can not permeate into clean soil body outside the polluted soil block 10 by bypassing the wall root of the external blocking wall 520; the outer blocking walls 520 are spaced from the boundaries of the contaminated soil block 10 in order to reduce the concentration of the contaminants within the contaminated soil block 10 when the contaminants permeate the outer blocking walls 520, so that the outer blocking walls 520 can prevent the contaminants from permeating into the clean soil outside the contaminated soil block 10 as much as possible.
The distance between the outer barrier walls 520 and the contaminated land boundary 600 is set according to actual circumstances. Alternatively, the outer barrier walls 520 may be spaced apart from the boundary of the contaminated soil block 10 by a distance of 4m to 10m.
In some embodiments, referring to fig. 6 and 7, the step of disposing an outer blocking wall 520 outside the boundary of the contaminated soil plot 10, the outer blocking wall 520 being spaced apart from the boundary of the contaminated soil plot 10, the outer blocking wall 520 having a waterproof layer formed on a side surface thereof, the outer blocking wall 520 having a depth within a second predetermined depth range so that the root of the outer blocking wall 520 can be embedded into the waterproof layer 20 of the underground soil body, the outer blocking wall 520 being a part of the blocking structure 500, includes the steps of:
cement is sprayed into soil bodies which are arranged at intervals outside the boundary of the polluted soil plot 10 and the cement and the soil bodies are stirred, so that the cement and the soil bodies react to harden the soil bodies to form a cement stirring pile wall, the thickness of the cement stirring pile wall is within a first preset thickness range, so that the side surface of the cement stirring pile wall can form a waterproof layer, the depth of the cement stirring pile wall is within a second preset depth range, so that the root of the cement stirring pile wall can be embedded into a waterproof layer 20 of the underground soil bodies, and the cement stirring pile wall is part of an external barrier wall 520. As such, a cement mixing stud wall is provided as the outer barrier wall 520 at the outer side of the contaminated land boundary 600.
It is easily understood that in the art, when the cement mixing pile wall reaches a certain thickness, the side of the cement mixing pile wall can form a waterproof layer, and the cement wall also has a waterproof function, which can prevent the liquid in the contaminated soil block 10 from penetrating into the external barrier wall 520 and thus into the clean soil outside the contaminated soil block 10.
Alternatively, the cement can be sprayed into the soil body by using a mixing pile machine and fully mixed, so that the cement and the soil are subjected to a series of physical and chemical reactions, the soil body is hardened, the strength of the soil body is improved, and the cement mixing pile wall is formed.
In some embodiments, referring to fig. 6 and 7, the step of providing a barrier structure 500 outside the contaminated soil accumulation zone 400 to isolate the contaminated soil accumulation zone 400 comprises the steps of:
the inner barrier layer 510 and the outer barrier wall 520 are connected to form a connection barrier layer 530, the connection barrier layer 530 is a part of the barrier structure 500, and the connection barrier layer 530, the inner barrier layer 510 and the outer barrier wall 520 are used for enclosing with the impermeable layer 20 of the underground soil body to form a closed space 540 to seal the contaminated soil accumulation area 400. Thus, the contaminated soil accumulation area 400 and the clean soil and the available space 300 outside the contaminated soil accumulation area 400 can be completely isolated, and the contaminants in the contaminated soil accumulation area 400 are prevented from polluting the clean soil and the available space 300 outside the contaminated soil accumulation area 400.
Preferably, the connection barrier layer 530 may be a cement connection board or a concrete connection board, the inner barrier layer 510 may be a cement barrier layer or a concrete barrier layer, the outer barrier wall 520 may be a cement mixing pile wall, and the layer thickness of the connection barrier layer 530, the layer thickness of the inner barrier layer 510, and the wall thickness of the outer barrier wall 520 are all large enough to make the pollutant, liquid, etc. in the polluted soil accumulation area 400 unable to penetrate through the connection barrier layer 530, the inner barrier layer 510, and the outer barrier wall 520 to enter the space outside the polluted soil accumulation area 400, so that the connection barrier layer 530, the inner barrier layer 510, and the outer barrier wall 520 can form a water-tight closed space 540 meeting the requirement of the polluted soil barrier with the water-tight layer 20 of the underground soil body, and the barrier structure 500 has higher pollutant barrier capability, and ensures that the pollutant in the polluted soil accumulation area 400 does not pollute the clean soil and the available space 300 outside the polluted soil accumulation area 400 within a certain service life.
In some embodiments, the step of detecting the accumulation of the pollutants in the polluted soil block 10 and dividing the polluted soil block 10 into at least two polluted soil areas 100 and at least two clean soil areas 200 according to the accumulation of the pollutants in the polluted soil block 10 includes the following steps:
a contaminant detector is used to detect the accumulation of contaminants within the contaminated soil plot 10.
Optionally, the pollutant species and the distribution of each pollutant species within the contaminated soil plot 10 are also detected by using a pollutant detector.
In some embodiments, referring to fig. 3, when the contaminated soil area 100 with the depth greater than the first preset value is identified as a thick contaminated soil area 100, the contaminated soil area 100 with the depth less than the first preset value is identified as a thin contaminated soil area 100; the method comprises the following steps of taking the depth direction of the polluted soil plot 10 as the projection direction, identifying the polluted soil area 100 with the projection area larger than the second preset value as a wide polluted soil area 100, and identifying the polluted soil area 100 with the projection area smaller than the second preset value as a narrow polluted soil area 100:
setting the first preset value as one half of the total depth of the polluted soil plot 10; the second preset value is set to be one-half of the total projected area of the contaminated soil lot 10 in the depth direction of the contaminated soil lot 10. In this way, the contaminated soil area 100 having a depth greater than one-half of the total depth of the contaminated soil block 10 is regarded as a thick contaminated soil area 100, and the contaminated soil area 100 having a depth less than one-half of the total depth of the contaminated soil block 10 is regarded as a thin contaminated soil area 100; the contaminated soil area 100 having a projected area larger than one-half of the total projected area of the contaminated soil block 10 in the depth direction of the contaminated soil block 10 is defined as a wide contaminated soil area 100, and the contaminated soil area 100 having a projected area smaller than one-half of the total projected area of the contaminated soil block 10 in the depth direction of the contaminated soil block 10 is defined as a narrow contaminated soil area 100
It is easy to understand that the first preset value and the second preset value are set according to the specific conditions of the size of the polluted soil plot 10, the distribution of the pollutants in the polluted soil plot 10, the aggregation degree of the pollutants, and the like, and when the volume of the polluted soil plot 10 is larger, the number of the pollutants in the polluted soil plot 10 is larger, and the distribution of the pollutants is more aggregated, the first preset value and the second preset value can be set to be larger values; when the contaminated soil block 10 has a small volume, the contaminants in the contaminated soil block 10 are less, and the distribution of the contaminants is sparse, the first preset value and the second preset value may be set to relatively small values.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of using contaminated land pieces, comprising the steps of:
detecting the accumulation condition of pollutants in a polluted land block, and dividing the polluted land block into at least two polluted soil areas and at least two clean soil areas according to the accumulation condition of the pollutants in the polluted land block;
identifying the polluted soil area with the depth larger than a first preset value as a thick polluted soil area, and identifying the polluted soil area with the depth smaller than the first preset value as a thin polluted soil area; regarding the depth direction of the polluted soil plot as a projection direction, regarding the polluted soil area with the projection area larger than a second preset value as a wide polluted soil area, and regarding the polluted soil area with the projection area smaller than the second preset value as a narrow polluted soil area;
moving the polluted soil of the wide and thin polluted soil area and the polluted soil of the narrow and thin polluted soil area to the wide and thick polluted soil area, and moving the polluted soil of the narrow and thick polluted soil area within a first preset depth range to the wide and thick polluted soil area, so that the wide and thin polluted soil area, the narrow and thin polluted soil area and the narrow and thick polluted soil area are free of polluted soil at the parts within the first preset depth range to form usable spaces, and the wide and thick polluted soil area and the narrow and thick polluted soil area form a polluted soil accumulation area at the parts outside the first preset depth range;
and arranging a blocking structure outside the polluted soil accumulation area to isolate the polluted soil accumulation area.
2. The contaminated soil block utilization method according to claim 1, further comprising, after the steps of detecting accumulation of contaminants in a contaminated soil block, and dividing the contaminated soil block into at least two contaminated soil areas and at least two clean soil areas according to the accumulation of contaminants in the contaminated soil block, the steps of:
and detecting the pollutant types in each polluted soil area, and when at least two pollutant types exist in the polluted soil area, further dividing the polluted soil area into a first type polluted soil subarea, a second type polluted soil subarea, a 8230; an 8230; and an nth type polluted soil subarea, wherein n is more than or equal to 2.
3. The method of utilizing contaminated land mass according to claim 2, wherein in the step of moving contaminated soil of the wide and thin contaminated soil area, contaminated soil of the narrow and thin contaminated soil area to the wide and thick contaminated soil area, and contaminated soil within a first predetermined depth range of the narrow and thick contaminated soil area to the wide and thick contaminated soil area, such that the wide and thin contaminated soil area, the narrow and thin contaminated soil area, and the narrow and thick contaminated soil area are free of contaminated soil at portions within the first predetermined depth range to form usable spaces, and the wide and thick contaminated soil area and the narrow and thick contaminated soil area form contaminated soil accumulation areas at portions outside the first predetermined depth range, the method comprises the steps of:
moving the polluted soil in the wide and thin first-class polluted soil subarea of the polluted soil area and the polluted soil in the narrow and thin first-class polluted soil subarea of the polluted soil area to the wide and thick first-class polluted soil subarea of the polluted soil area, and moving the polluted soil in the narrow and thick first-class polluted soil subarea of the polluted soil area within the first preset depth range to the wide and thick first-class polluted soil subarea of the polluted soil area;
moving polluted soil in a wide and thin second type polluted soil subarea of the polluted soil area and polluted soil in a narrow and thin second type polluted soil subarea of the polluted soil area to a wide and thick second type polluted soil subarea of the polluted soil area, and moving the polluted soil of the narrow and thick second type polluted soil subarea of the polluted soil area within the first preset depth range to the wide and thick second type polluted soil subarea of the polluted soil area;
and by analogy, moving the polluted soil in the nth polluted soil subarea of the wide and thin polluted soil area and the polluted soil in the nth polluted soil subarea of the narrow and thin polluted soil area to the nth polluted soil subarea of the wide and thick polluted soil area, and moving the polluted soil of the nth polluted soil subarea of the narrow and thick polluted soil area within the first preset depth range to the nth polluted soil subarea of the wide and thick polluted soil area.
4. The method of utilizing a contaminated soil block according to claim 1, further comprising, before the step of moving contaminated soil in the wide and thin contaminated soil zone and contaminated soil in the narrow and thin contaminated soil zone to the wide and thick contaminated soil zone, and moving contaminated soil in a first predetermined depth range of the narrow and thick contaminated soil zone to the wide and thick contaminated soil zone, so that the wide and thin contaminated soil zone, the narrow and thin contaminated soil zone, and the narrow and thick contaminated soil zone are free of contaminated soil in a portion within the first predetermined depth range to form a usable space, and the wide and thick contaminated soil zone and the narrow and thick contaminated soil zone are free of contaminated soil in a portion outside the first predetermined depth range to form a contaminated soil accumulation zone:
dividing the polluted soil plot into a non-utilization area, a local utilization area and a full utilization area according to the use requirement of a land construction scheme on the polluted soil plot;
and planning the wide and thick polluted soil area as a non-utilization area, planning the wide and thin polluted soil area and the narrow and thin polluted soil area as all-utilization areas, and planning the narrow and thick polluted soil area as a local utilization area.
5. The method of utilizing a contaminated soil mass according to claim 1, wherein in the step of providing a barrier structure outside said contaminated soil accumulation zone to isolate said contaminated soil accumulation zone, the steps of:
the soil block pollution device is characterized in that an external separation wall is arranged on the outer side of the periphery of the polluted soil block boundary, the external separation wall and the polluted soil block boundary are arranged at intervals, a waterproof layer is formed on the side face of the external separation wall, the depth of the external separation wall is within a second preset depth range, so that the root of the external separation wall can be embedded into a waterproof layer of an underground soil body, and the external separation wall is a part of a separation structure.
6. The contaminated soil block utilization method according to claim 5, wherein the step of providing an outer barrier wall circumferentially outside the contaminated land block boundary, the outer barrier wall being spaced apart from the contaminated land block boundary, the outer barrier wall having a waterproof layer formed on a side surface thereof, the outer barrier wall having a depth within a second predetermined depth range so that a root portion thereof can be embedded in the waterproof layer of the underground soil body, the outer barrier wall being a part of the barrier structure comprises the steps of:
cement is sprayed into soil bodies arranged at intervals on the outer sides of the periphery of the polluted land block boundary and is stirred with the soil bodies, so that the cement and the soil bodies react to form cement stirring pile walls, the thickness of the cement stirring pile walls is within a first preset thickness range so that the side surfaces of the cement stirring pile walls can form a waterproof layer, the depth of the cement stirring pile walls is within a second preset depth range so that the roots of the cement stirring pile walls can be embedded into a waterproof layer of underground soil bodies, and the cement stirring pile walls are part of the external barrier walls.
7. The method of utilizing a contaminated soil block according to claim 5, wherein in the step of providing a barrier structure outside the contaminated soil accumulation zone to isolate the contaminated soil accumulation zone, the method comprises the steps of:
and constructing an inner barrier layer at the bottom and the circumferential outer side of the available space to isolate the available space from the polluted soil accumulation area.
8. The method of utilizing a contaminated land mass according to claim 7, wherein in the step of providing a barrier structure outside said contaminated soil accumulation zone to isolate said contaminated soil accumulation zone, the steps of:
inner barrier layer with it is provided with the connection barrier layer to connect between the outside separation wall, the connection barrier layer does a part of separation structure, the connection barrier layer inner barrier layer outside separation wall be used for with the impervious barrier of the underground soil body encloses to close and forms the closed space in order to seal pollute soil gathering area.
9. The contaminated land mass utilizing method according to any one of claims 1 to 8, wherein in the step of detecting a contaminant accumulation condition in a contaminated land mass, dividing the contaminated land mass into at least two contaminated soil areas and at least two clean soil areas according to the contaminant accumulation condition in the contaminated land mass, the method comprises the steps of:
detecting the accumulation of pollutants in the polluted land mass by using a pollutant detector.
10. The method of contaminated land mass utilization according to any of claims 1 to 8, characterized in that, in identifying as thick said contaminated soil zone having a depth greater than a first preset value, identifying as thin said contaminated soil zone having a depth less than said first preset value; the method comprises the following steps of taking the depth direction of the polluted soil plot as the projection direction, identifying the polluted soil area with the projection area larger than a second preset value as a wide polluted soil area, and identifying the polluted soil area with the projection area smaller than the second preset value as a narrow polluted soil area:
setting the first preset value as one half of the total depth of the polluted soil plot; and setting the second preset value as one half of the total projection area of the polluted soil plot in the depth direction of the polluted soil plot.
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