CN108356069A - Polluted Soil stir in situ uniformity computational discrimination method - Google Patents
Polluted Soil stir in situ uniformity computational discrimination method Download PDFInfo
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- CN108356069A CN108356069A CN201810088773.8A CN201810088773A CN108356069A CN 108356069 A CN108356069 A CN 108356069A CN 201810088773 A CN201810088773 A CN 201810088773A CN 108356069 A CN108356069 A CN 108356069A
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- situ
- soil
- stir
- uniformity
- depth direction
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- 238000003756 stirring Methods 0.000 title claims abstract description 107
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 95
- 239000002689 soil Substances 0.000 title claims abstract description 86
- 238000012850 discrimination method Methods 0.000 title claims abstract description 15
- 230000035515 penetration Effects 0.000 claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 230000003068 static effect Effects 0.000 claims description 13
- 238000007689 inspection Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 48
- 238000000034 method Methods 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000003814 drug Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005067 remediation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of Polluted Soil stir in situ uniformity computational discrimination methods, it is characterised in that the computational discrimination method includes the following steps:Test obtains the pH value and moisture content of soil sample at each sampled point in the groups of samples being located in same depth plane, if variance≤0.5 PH and moisture content variance≤0.02 of each sampled point soil sample in the same groups of samples, show that soil body stir in situ is uniform in the depth plane where the groups of samples.It is an advantage of the invention that:The index system judged using pH value, moisture content, specific penetration resistance P S as Polluted Soil stir in situ uniformity, to realize the quick judgement of the uniformity in the plane and on depth direction to stir in situ.
Description
Technical field
The invention belongs to field of environment engineering technology, and in particular to a kind of Polluted Soil stir in situ uniformity computational discrimination side
Method.
Background technology
With the industrialized fast development in China, soil environment is constantly endangered by various pollutions, meanwhile, contaminated soil
The demand of repairing and treating will be increasing.Original position can be divided into according to disposal site for the repairing and treating technology of pollution soil sample at present
It repairs and showering, based technique for in-situ remediation is just becoming the following recovery technique and selecting because at low cost, consume energy small, non-secondary pollution
Hot spot.In situ remediation technology mainly has heat treatment, chemical oxidization method, multiphase extracting, bioanalysis etc., and chemical oxidation skill
Art is quick, cost is controllable, has been widely used in field engineering reparation.Based technique for in-situ remediation is divided into original position according to embodiment
Injection and stir in situ.
Stir in situ reparation carries out fixed point stirring frequently with engineering pile-forming equipment or digging machine stir in situ equipment and injects oxygen
Chemical drug agent.After stir in situ the uniformity of the soil body for medicament and the soil body come into full contact with and final pollutant removal is imitated
Fruit is affected, and differentiates relevant index system not yet for stir in situ soil body uniformity at present.
Invention content
According to the deficiencies of the prior art described above, It is an object of the present invention to provide a kind of Polluted Soil stir in situ uniformities
Computational discrimination method, it is uniform which judges stir in situ in the plane by using pH value and moisture content
Property, while it is uniform by using static sounding data and specific penetration resistance P S curve to judge stir in situ in the depth direction
Property.
The object of the invention realization is completed by following technical scheme:
A kind of Polluted Soil stir in situ uniformity computational discrimination method, it is characterised in that the computational discrimination method includes following step
Suddenly:Test obtains the pH value and moisture content of soil sample at each sampled point in the groups of samples being located in same depth plane, if same
Variance≤0.5 PH and moisture content variance≤0.02 of each sampled point soil sample in the groups of samples then show described adopt
Soil body stir in situ is uniform in depth plane where sampling point group.
The computational discrimination method is further comprising the steps of:Using static sounding device in situ to the soil body after stir in situ
Static sounding in situ is carried out, to obtain static sounding data and specific penetration resistance P S curve in the depth direction, if in depth
Each specific penetration resistance P S value on direction is no more than threshold value P, then shows that soil in-situ stirs evenly in the depth direction.
Soil layer is polluted for the superficial part being made of miscellaneous fill and cohesive soil, if each specific penetration resistance P S in the depth direction
Value is no more than 0.3 MPa, then shows that soil in-situ stirs evenly in the depth direction.
The mode of the Polluted Soil stir in situ stirs for body formula, and it is in latticed prison that stir in situ region division, which is several,
Survey unit.
Each sampled point in the groups of samples is arranged in center and four in the latticed monitoring unit
Corner location.
The mode of the Polluted Soil stir in situ is the stirring of stake formula, and stir in situ region is by several adjacent overlapped mixing piles
Body is composed, and each stirring pile body constitutes a monitoring unit.
Each sampled point in the groups of samples is arranged in the center of the stirring pile body and the adjacent stirring
Crosspoint between pile body.
Each groups of samples is 0.5-1.0m in the setting spacing of depth direction.
It is an advantage of the invention that:It is judged using pH value, moisture content, specific penetration resistance P S as Polluted Soil stir in situ uniformity
Index system, to realize the quick judgement of the uniformity in the plane and on depth direction to stir in situ.
Description of the drawings
Sampled point arrangement schematic diagram when Fig. 1 is body formula paddling process in the present invention;
Sampled point arrangement schematic diagram when Fig. 2 is stake formula paddling process in the present invention;
Fig. 3 is the sectional view of original position stirring region in the present invention;
Fig. 4 is the pH value and moisture content statistics in the present invention in the 3m depth bounds of monitoring unit 1-1,1-2,2-1,2-2,2-3
Table;
Fig. 5 is the pH value and moisture content statistical form in the 6m depth bounds of monitoring unit Z1, Z2, Z3, Z4 in the present invention;
Fig. 6 is the forward and backward soil body specific penetration resistance P S curve of stir in situ in a certain monitoring unit 6m depth bounds in the present invention
Contrast schematic diagram.
Specific implementation mode
The feature of the present invention and other correlated characteristics are described in further detail by embodiment below in conjunction with attached drawing, with
Convenient for the understanding of technical staff of the same trade:
Such as Fig. 1-6, respectively label is respectively in figure:Monitoring unit 1, sampled point 2, groups of samples 3, layering boundary line 4.
Embodiment 1:As shown in Figure 1,3, the present embodiment is specifically related to a kind of Polluted Soil stir in situ uniformity computational discrimination
Method specifically includes following steps:
(1)As shown in Figure 1, completing the stir in situ to Polluted Soil using body formula stirring means, stir in situ region is constituted;It
Afterwards, be several by stir in situ region division it is in latticed monitoring unit 1, grid is advisable with rectangular, and the area of each grid is not
Preferably more than 25 ㎡, so-called body formula stirring specifically refers to that the pollution soil body is equally divided into several latticed lists before stirring
Member utilizes stirring-head to complete the stirring reparation to each latticed unit later;
(2)As shown in Figure 1,3, different soil layers is distributed in the depth direction of stirring region in situ, and layering boundary line 4 is each soil
Line of demarcation between layer;Therefore, in each monitoring unit 1, a groups of samples is arranged at interval of 0.5-1.0m along depth direction
3, it should be ensured that a groups of samples 3 is all disposed in each soil layer, each groups of samples 3 includes several in same level
Sampled point 2, each sampled point 2 are distributed in the center position and four corner locations of grid;
(3)As shown in Figure 1,3, soil-like is carried out to each sampled point 2 respectively using fetch earth hand drill or lightweight sample acquisition machine
The acquisition of product carries out pH value test, while utilizing baking oven using PH meters to soil sample acquired in same monitoring unit 1 later
Method carries out soil sample acquired in same monitoring unit 1 test of moisture content;
(4)Object is judged using each monitoring unit 1 as one, with the sampled point in monitoring unit 1 in same depth plane
Each sampled point 2 is one group in group 3, calculates the PH of soil sample and the average value of moisture content and variance, and carry out data comparison, specifically such as
Under:
If variance≤0.5 soil sample PH between each sampled point 2 in the groups of samples 3 in same depth plane and moisture content
Variance≤0.02, then it is assumed that the soil in-situ stirring in the monitoring unit 1 in corresponding depth plane is uniform, can also be recognized
For the soil in-situ stirring of soil layer where the depth plane is also uniform;
In addition, PH variances above-mentioned and moisture content variance are smaller, then stir in situ is more uniform;
It is illustrated in figure 4 the pH value at monitoring unit 1-1,1-2,2-1,2-2,2-3 within the scope of 3m pollution depths in the present embodiment
With moisture content statistical table, four corners and center point data of pH value and moisture content data for monitoring unit 1, and pH value is to be added
PH value after sodium peroxydisulfate and sodium hydroxide stirring;As it can be seen that in monitoring unit 1-1, it is in situ at 1.0m and 2.0m depth planes
It stirs evenly;In monitoring unit 1-2, stir in situ is uneven at 1.0m and 2.0m depth planes;In monitoring unit 2-1,
Stir in situ is uneven at 1.0m and 2.0m depth planes;In monitoring unit 2-2, stirred in situ at 1.0m and 2.0m depth planes
It mixes uniformly;In monitoring unit 2-3, stir in situ is uniform at 1.0m and 2.0m depth planes;
PH value and moisture content within the scope of 6m pollution depths at monitoring unit Z1, Z2, Z3, Z4 are illustrated in figure 5 in the present embodiment
Statistical table, pH value and moisture content data are four corners and the center point data of monitoring unit 1, and pH value is that sodium peroxydisulfate is added
PH value after being stirred with sodium hydroxide;As it can be seen that in monitoring unit Z1, stir in situ is uniform at 1.0m and 2.0m depth planes;
In monitoring unit Z2, stir in situ is uneven at 1.0m and 2.0m depth planes;In monitoring unit Z3,1.0m and 2.0m are deep
It is uniform to spend stir in situ at plane;In monitoring unit Z4, stir in situ is uniform at 1.0m and 2.0m depth planes;
(5)After completing to judge the stir in situ uniformity of monitoring unit 1 in the plane, continue to monitoring unit 1 in depth
Stir in situ uniformity on degree direction is judged:
The uniformity of the soil body in the depth direction obtains static sounding by the way of static sounding in situ after the completion of stir in situ
Data and specific penetration resistance P S curve, to be analyzed and be judged;It is illustrated in figure 6 in 1 depth bounds 6m of a certain monitoring unit
Stir in situ before and after soil body specific penetration resistance P S curve comparison schematic diagram, first by the ratio after stir in situ on depth direction
Penetration resistance Ps curves are compared with the original specific penetration resistance P S curve before stir in situ, the uniform soil body after stir in situ
Soil strength can significantly reduce in longitudinal depth bounds after medicament injection and outer force-disturbance, and specific penetration resistance P S curve can be from
Originally smoother curve is alternate with raised " burr " curve is changed into smooth continuous curve, and numerically significantly reduces,
Curve is moved to the directions 0Mpa, thinks that soil body uniformity is preferable at this time;This is from the apparent determination method on image, the present embodiment
In specifically quantify determination method and be:The static sounding data after stir in situ can be analyzed(A ratio can be generated at interval of 10cm
Penetration resistance Ps values), soil layer is polluted often based on miscellaneous fill and cohesive soil for superficial part, soil body specific penetration resistance after stir in situ
Ps values are generally in 0~0.3Mpa, it is believed that the soil body in place monitoring unit 1 has stirred evenly in the depth direction;If in situ
Soil body specific penetration resistance P S value is more than 0.3MPa after stirring, then it is assumed that the soil body in place monitoring unit 1 is former in the depth direction
Position stirring is uneven.
It should be noted that be above to the evaluation method of the stir in situ uniformity in a certain depth plane and
The evaluation method of stir in situ uniformity on depth direction, generally speaking for monitoring unit 1, only when in monitoring unit 1
When stir in situ in each depth plane is judged as stir in situ uniformly and in the depth direction and is also judged as uniform,
It can judge and think the monitoring unit 1 stir in situ is uniform on the whole.If conversely, in monitoring unit 1 in any depth plane
Stir in situ be judged as stir in situ uneven or in the depth direction be judged as it is uneven, then judge think this
Stir in situ is uneven on the whole for monitoring unit 1.
Embodiment 2:As shown in Figure 2,3, the present embodiment is specifically related to a kind of Polluted Soil stir in situ uniformity computational discrimination
Method specifically includes following steps:
(1)As shown in Fig. 2, completing the stir in situ to Polluted Soil using stake formula stirring means, stir in situ region is constituted;It
It afterwards, will each one monitoring unit 1 of the stereoscopic work of individual mixing pile;So-called stake formula stirring specifically refers to institute's shape after completion of stirring
At cylindrical stirring pile body should carry out the overlap joint that intersects between adjacent stirring pile body when carrying out the stirring of stake formula;
(2)As shown in Figure 2,3, different soil layers is distributed in the depth direction of stirring region in situ, and layering boundary line 4 is each soil
Line of demarcation between layer;Therefore, in each monitoring unit 1, a groups of samples is arranged at interval of 0.5-1.0m along depth direction
3, it should be ensured that a groups of samples 3 is all disposed in each soil layer, each groups of samples 3 includes several in same level
Sampled point 2, each sampled point 2 are distributed in the overlap joint cross-point locations between the central point and adjacent stirring pile body of stirring pile body;
(3)As shown in Figure 2,3, soil-like is carried out to each sampled point 2 respectively using fetch earth hand drill or lightweight sample acquisition machine
The acquisition of product carries out pH value test, while utilizing baking oven using PH meters to soil sample acquired in same monitoring unit 1 later
Method carries out soil sample acquired in same monitoring unit 1 test of moisture content;
(4)Object is judged using each monitoring unit 1 as one, with the sampled point in monitoring unit 1 in same depth plane
Each sampled point 2 is one group in group 3, calculates the PH of soil sample and the average value of moisture content and variance, and carry out data comparison, specifically such as
Under:
If variance≤0.5 soil sample PH between each sampled point 2 in the groups of samples 3 in same depth plane and moisture content
Variance≤0.02, then it is assumed that the soil in-situ stirring in the monitoring unit 1 in corresponding depth plane is uniform, can also be recognized
For the soil in-situ stirring of soil layer where the depth plane is also uniform;
In addition, PH variances above-mentioned and moisture content variance are smaller, then stir in situ is more uniform;
(5)After completing to judge the stir in situ uniformity of monitoring unit 1 in the plane, continue to monitoring unit 1 in depth
Stir in situ uniformity on degree direction is judged:
The uniformity of the soil body in the depth direction obtains static sounding by the way of static sounding in situ after the completion of stir in situ
Data and specific penetration resistance P S curve, to be analyzed and be judged;It is illustrated in figure 6 in 1 depth bounds 6m of a certain monitoring unit
Stir in situ before and after soil body specific penetration resistance P S curve comparison schematic diagram, first by the ratio after stir in situ on depth direction
Penetration resistance Ps curves are compared with the original specific penetration resistance P S curve before stir in situ, the uniform soil body after stir in situ
Soil strength can significantly reduce in longitudinal depth bounds after medicament injection and outer force-disturbance, and specific penetration resistance P S curve can be from
Originally smoother curve is alternate with raised " burr " curve is changed into smooth continuous curve, and numerically significantly reduces,
Curve is moved to the directions 0Mpa, thinks that soil body uniformity is preferable at this time;This is from the apparent determination method on image, the present embodiment
In specifically quantify determination method and be:The static sounding data after stir in situ can be analyzed(A ratio can be generated at interval of 10cm
Penetration resistance Ps values), soil layer is polluted often based on miscellaneous fill and cohesive soil for superficial part, soil body specific penetration resistance after stir in situ
Ps values are generally in 0~0.3Mpa, it is believed that the soil body in place monitoring unit 1 has stirred evenly in the depth direction;If in situ
Soil body specific penetration resistance P S value is more than 0.3MPa after stirring, then it is assumed that the soil body in place monitoring unit 1 is former in the depth direction
Position stirring is uneven.
Claims (3)
1. a kind of Polluted Soil stir in situ uniformity computational discrimination method, it is characterised in that the computational discrimination method includes following
Step:Test obtains the pH value and moisture content of soil sample at each sampled point in the groups of samples being located in same depth plane, if together
Variance≤0.5 PH and moisture content variance≤0.02 of each sampled point soil sample in one groups of samples then show described
Soil body stir in situ is uniform in depth plane where groups of samples.
2. a kind of Polluted Soil stir in situ uniformity computational discrimination method according to claim 1, it is characterised in that described
Computational discrimination method is further comprising the steps of:Static(al) in situ is carried out to the soil body after stir in situ using static sounding device in situ
Feeler inspection, to obtain static sounding data and specific penetration resistance P S curve in the depth direction, if each ratio in the depth direction
Penetration resistance Ps values are no more than threshold value P, then show that soil in-situ stirs evenly in the depth direction.
3. a kind of Polluted Soil stir in situ uniformity computational discrimination method according to claim 2, it is characterised in that for
Soil layer is polluted by the superficial part that miscellaneous fill and cohesive soil are constituted, if each specific penetration resistance P S value in the depth direction is no more than
0.3 MPa then shows that soil in-situ stirs evenly in the depth direction.
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Application publication date: 20180803 |