CN110935721A - Closed soil taking system for polluted soil and soil taking replacement repair method - Google Patents
Closed soil taking system for polluted soil and soil taking replacement repair method Download PDFInfo
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- CN110935721A CN110935721A CN201911358742.0A CN201911358742A CN110935721A CN 110935721 A CN110935721 A CN 110935721A CN 201911358742 A CN201911358742 A CN 201911358742A CN 110935721 A CN110935721 A CN 110935721A
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- 239000002689 soil Substances 0.000 title claims abstract description 206
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008439 repair process Effects 0.000 title claims abstract description 26
- 238000005553 drilling Methods 0.000 claims abstract description 59
- 238000005527 soil sampling Methods 0.000 claims abstract description 55
- 239000003814 drug Substances 0.000 claims abstract description 48
- 239000000428 dust Substances 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 13
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 11
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 6
- 241001330002 Bambuseae Species 0.000 claims abstract description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 6
- 239000011425 bamboo Substances 0.000 claims abstract description 6
- 238000011066 ex-situ storage Methods 0.000 claims abstract description 6
- 239000000796 flavoring agent Substances 0.000 claims abstract description 4
- 235000019634 flavors Nutrition 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 30
- 229940079593 drug Drugs 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 238000005507 spraying Methods 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 11
- 239000003112 inhibitor Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009412 basement excavation Methods 0.000 abstract description 6
- 238000003915 air pollution Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 18
- 238000005067 remediation Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000003900 soil pollution Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a closed contaminated soil borrowing system and a soil borrowing replacement repair method, relates to the technical field of contaminated soil repair, and solves the technical problems of ex-situ repair of scattered and distributed small-range deep contaminated soil, insufficient safety of foundation pit support, limited support space and generation of raised dust and peculiar smell during excavation in the prior art. The closed contaminated soil sampling system comprises a closed soil sampling device, a sealed casing device and a dustproof and odor-inhibiting device; wherein, protect a section of thick bamboo and bury in the contaminated soil, airtight geotome of borrowing device can creep into the soil in protecting a section of thick bamboo and take out soil, and the medicament of dustproof inhibiting the flavor device sprays the unit and can stretch into protect a section of thick bamboo oral area. The method comprises the steps of embedding a pile casing, drilling to take soil, backfilling clean soil, pulling the pile casing and the like. The invention provides a closed soil borrowing system and a soil borrowing replacement repair method for the polluted soil, which are suitable for scattered distributed deep polluted soil in a small range, ensure the safety of support and prevent air pollution.
Description
Technical Field
The invention relates to the technical field of contaminated soil remediation, in particular to a contaminated soil closed soil borrowing system and a soil borrowing replacement remediation method.
Background
With the development of urban industrialization, the problem of soil pollution is very slow. According to the requirements of relevant national laws and regulations, the site needs to be investigated and risk evaluated after the industrial enterprise is moved and before the site is reused, and the site with pollution needs to be repaired. The industrial polluted site in China has various pollutants, some factories have long history and serious pollution, and different functional areas are distributed more dispersedly, so that the depth of the polluted soil is deeper, and a small-range deep polluted site with scattered distribution is formed. In-situ or ex-situ remediation technology can be adopted for deep polluted soil with dispersed pollution.
The in-situ remediation refers to a process of treating the unearthed soil, can effectively remediate the deeply polluted soil, avoids large-area excavation of the soil, and prevents the generation of dust and peculiar smell in the construction process. However, the project implementation time of the restoration mode is long, and the restoration effect is greatly influenced by the soil type and the soil stratum.
The construction implementation time of the ectopic repair is shorter, and the prediction of the repair treatment effect is higher than that of the in-situ repair. However, the deep foundation pit is formed by excavating the deep polluted soil in the restoration mode, the supporting safety and the supporting space are influenced by buildings around the site, the excavation disturbance in the restoration process is obvious, and the raising dust and the peculiar smell are easily generated in the exposed excavation process.
The applicant finds that in the prior art, for the heterotopic remediation of scattered small-range deep contaminated soil, the deep foundation pit support increases the site remediation engineering quantity, and the small-range deep excavation has the problems of limited foundation pit support safety and support space, which undoubtedly increases the soil remediation difficulty.
Disclosure of Invention
The invention aims to provide a contaminated soil closed soil taking system and a soil taking replacement repair method, and aims to solve the technical problems that the ex-situ repair of scattered and distributed deep contaminated soil in a small range exists, the safety and the supporting space of a foundation pit are limited, the soil repair difficulty is increased, and dust raising odor is generated in exposed excavation in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes of the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a closed contaminated soil sampling system which comprises a closed soil sampling device, a sealed casing protecting device and a dustproof odor inhibiting device; wherein the content of the first and second substances,
the sealed cylinder protecting device comprises a cylinder, and the cylinder is of a cylindrical structure and can be buried in the polluted soil;
the closed soil sampling device comprises a soil sampling device body and a soil sampling drilling tool, and the soil sampling drilling tool can drill into the soil in the pile casing and can take out the soil in the pile casing;
dustproof device of suppressing flavor includes that the medicament sprays the unit, the medicament sprays the unit and can stretch into protect a section of thick bamboo oral area.
In a preferred or alternative embodiment, the casing is detachably connected with the soil taking device body;
and/or the outer wall surface of the soil sampling drilling tool can be attached to the inner wall surface of the casing.
In a preferred or alternative embodiment, the sealing casing device comprises at least two casings, and the at least two casings are connected end to end in sequence.
In a preferred or alternative embodiment, the soil sampling drilling tool comprises a containing box and a drill bit, the drill bit is rotatably connected with the soil sampling device body, the containing box is fixedly connected with the soil sampling device body, a partial section of the drill bit is arranged in the containing box and can rotate relative to the containing box around the axial direction of the drill bit, and when the drill bit drills into soil, the soil can be screwed into the containing box.
In a preferred or alternative embodiment, the bottom of the container box is provided with a through hole, and a cover plate is arranged on a section of the drill bit outside the container box, wherein the cover plate and the drill bit can synchronously rotate and can cover the through hole.
In a preferred or alternative embodiment, one surface of the cover plate is parallel to the bottom of the containing box, and the through hole has a smaller flow area than the surface of the cover plate parallel to the containing box.
In a preferred or alternative embodiment, the dust and odor preventing device further comprises a storage unit and a delivery unit, the delivery unit communicating the storage unit with the medicament spraying unit.
In a preferred or alternative embodiment, the storage unit comprises a medicament storage tank and a water storage tank;
the conveying unit comprises a stirring tank and a drug injection pump, the drug storage tank and the water storage tank are connected in parallel and then are communicated with the stirring tank, and the stirring tank is communicated with the drug injection pump through a pipeline;
the medicament spraying unit is a telescopic spray head, and the medicament injection pump is communicated with the telescopic spray head through a pipeline.
In a preferred or optional embodiment, the telescopic nozzle comprises an inner pipe and an outer pipe, the outer pipe can be sleeved outside at least a part of the inner pipe, the inner pipe is communicated with the pipeline, and threads which are matched with each other are arranged between the inner wall surface of the outer pipe and the outer wall surface of the inner pipe.
In preferred or optional embodiment, prevent dust and suppress flavor device still includes the automatic control integrated system the injection pump with between the medicament sprays the unit be provided with injection switch, flow sensor and manometer on the pipeline, the injection pump flow sensor the manometer and the medicament sprays the unit all with the automatic control integrated system electricity is connected.
The method for carrying out soil borrowing replacement repair by using the closed soil borrowing system for the polluted soil provided by any embodiment of the invention comprises the following steps:
step A: leveling a field, and determining the center of a hole site;
and B: embedding a pile casing, installing the pile casing on a soil taking device body, and driving the pile casing to drill into soil by using the soil taking device body;
and C: drilling and taking soil, detaching the pile casing from the soil taking device body, drilling the soil taking drilling tool into the soil in the pile casing, and loading the polluted soil into the soil taking drilling tool to be taken above the ground;
step D: unloading the polluted soil, namely dumping the polluted soil in the soil taking drilling tool into a closed transport vehicle for storage;
step E: spraying an odor inhibitor or a dust inhibitor;
step F: backfilling clean soil, namely backfilling the clean soil into the protective cylinder and tamping the clean soil in layers;
step G: pulling the protective cylinder, connecting the soil taking device body with the protective cylinder after backfilling clean soil, and pulling out the protective cylinder;
step H: backfilling the hole opening, and backfilling clean soil until the soil is level to the ground and tamping;
step I: leveling the field;
step J: transporting and repairing the polluted soil, namely transporting the polluted soil in the closed transport vehicle to an ex-situ repair system for treatment;
repeating the step C and the step D until clean soil is dug out, then performing the step E, and fixedly connecting the pile casing to be embedded with the previous pile casing when the step B is repeated, and then embedding;
repeating the step A to the step H to drill holes and take soil at different positions within the pollution range, and replacing the soil within the pollution range; ensuring that the red line of the polluted site is contained in the drilling range;
step I is carried out after the soil within the pollution range is replaced, and a field within the pollution range is paved;
and D, restoring the polluted soil in the step J after replacing the soil in the pollution range.
In a preferred or alternative embodiment, when the hole site center is determined in step a, adjacent drill holes are engaged with each other; and/or, when the step A is repeated, the center of the hole position of the drilled hole is square.
In a preferred or alternative embodiment, soil remediation is performed in the second hole after remediation of soil in the first hole is completed, with a gap between the first hole and the second hole; and after the second hole is repaired, repairing the soil in the third hole, wherein the third hole is positioned in the gap between the first hole and the second hole and is mutually occluded with the first hole and the second hole.
In a preferred or alternative embodiment, the drilling depth is L, the drilling verticality is K, and the drilling engagement thickness is d, which satisfy: d-2KL is more than or equal to 50 mm;
and/or the meshing area between the adjacent drill holes is S0, the central angle of the meshing surface is theta, the sector area of the theta is S1, the triangular area of the theta is S2, and the meshing area between the adjacent drill holes satisfies the following conditions: s0 ═ (S1-S2) × 2.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
the invention provides a closed contaminated soil sampling system which comprises a closed soil sampling device, a sealed casing protecting device and a dustproof odor-inhibiting device, wherein the sealed casing protecting device can be buried in soil, a soil sampling drilling tool can drill into the soil in the casing, and after the soil in the casing is taken out, the casing can play a role of supporting to prevent the wall of a hole from collapsing, and meanwhile, the supporting of a deep foundation pit is not needed, so that the problems of limited space and safety of foundation pit supporting are avoided, and the construction period can be shortened; when taking out soil, downthehole contaminated soil can briefly expose in the air, and soil may produce raise dust, peculiar smell contaminated air, dustproof inhibiting odor device can be to spraying smell inhibitor or dustproof inhibitor in protecting a section of thick bamboo, can prevent to pollute soil contaminated air, makes the process of fetching earth safe environmental protection more.
The preferable technical scheme in the technical schemes provided by the invention can at least produce the following technical effects:
1. the invention can prevent the hole wall from collapsing, does not need the support of a deep foundation pit, avoids the problems of limited space and safety of the support of the foundation pit and can shorten the construction period;
2. the invention can prevent the raising dust or peculiar smell generated in the soil taking process, so that the soil taking process is safer and more environment-friendly;
3. according to the invention, holes are dug and soil is taken in an occlusion mode, so that the polluted soil can be thoroughly dug and taken, and the field restoration effect is ensured;
4. the diameter of the drill hole can reach 1500-1800mm, the repair depth of the drill hole can reach 40-56m, and the drill hole has good repair effect on deep and ultra-deep polluted soil;
5. the sealing casing device comprises a plurality of single-section casings, the length range of the single-section casings is 0.5-7 m, the single-section casings can be freely and flexibly combined according to the repair depth, different casing lengths are matched, and the repair requirements of different depths are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a closed soil sampling system for contaminated soil provided by the present invention;
FIG. 2 is a schematic view of the earth-boring tool structure provided by the present invention;
FIG. 3 is a schematic view of the bit shown in FIG. 2;
FIG. 4 is a schematic structural view of a chemical spraying unit provided in the present invention;
FIG. 5 is a schematic view of a drilling process provided by the present invention;
FIG. 6 is a drill hole layout provided by the present invention;
FIG. 7 is a flow chart of the soil borrowing replacement repair method provided by the present invention;
FIG. 8 is a schematic view showing a state before embedding the casing;
FIG. 9 is a schematic view showing a state after the pile casing is buried;
FIG. 10 is a schematic view of a drilling and borrowing step;
FIG. 11 is a schematic view of a contaminated soil discharge step;
FIG. 12 is a schematic view of a clean soil backfilling step;
FIG. 13 is a schematic view of the step of pulling up the casing.
In the figure, 1, a soil sampling device is sealed; 11. a soil sampling device body; 12. a soil sampling drilling tool; 121. an accommodating box; 122. a drill bit; 123. a through hole; 124. a cover plate; 125. drilling teeth; 2. sealing the casing protecting device; 21. protecting the cylinder; 3. a dust-proof and odor-inhibiting device; 31. a drug spraying unit; 311. an inner tube; 312. an outer tube; 32. a storage unit; 321. a medicament storage tank; 322. a water storage tank; 33. a conveying unit; 331. a stirring tank; 332. a drug injection pump; 34. a self-control integrated system; 35. a medicine injection switch; 36. a flow sensor; 37. a pressure gauge; 38. a pipeline; 4. a closed transport vehicle; 5. a first hole; 6. a second hole; 7. a third aperture.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a contaminated soil closed soil borrowing system and a soil borrowing replacement repair method, which are suitable for scattered distributed small-range deep soil pollution, ensure the safety of support and reduce the difficulty of soil repair.
The technical solution provided by the present invention will be explained in more detail with reference to fig. 1 to 13.
As shown in fig. 1 to 13, the closed contaminated soil sampling system provided by the present invention comprises a closed soil sampling device 1, a sealed casing device 2 and a dust-proof and odor-inhibiting device 3; wherein the content of the first and second substances,
the sealed cylinder protecting device 2 comprises a cylinder protecting 21, and the cylinder protecting 21 is of a cylindrical structure and can be buried in the polluted soil;
the closed soil sampling device 1 comprises a soil sampling device body 11 and a soil sampling drilling tool 12, wherein the soil sampling drilling tool 12 can drill into soil in the pile casing 21 and can take out the soil in the pile casing 21;
the dust-proof and odor-suppressing device 3 includes a medicine spraying unit 31, and the medicine spraying unit 31 can extend into the mouth area of the shield 21.
Specifically, the soil sampling device body 11 is a drilling machine in the prior art, the structure of which is the prior art and is not described herein, and the soil sampling drilling tool 12 is installed at the tail end of a drill rod of the drilling machine. The invention provides a closed soil taking system for polluted soil, which comprises a closed soil taking device 1, a sealed casing protecting device 2 and a dustproof odor-inhibiting device 3, wherein the sealed casing protecting device 2 can be buried in the soil, a soil taking drilling tool 12 can drill into the soil in a casing 21, and the casing 21 can play a role of supporting to prevent the wall of a hole from collapsing after the soil in the casing 21 is taken out; the closed soil taking system for the polluted soil is closed in the soil taking and transporting processes, so that the polluted soil is effectively prevented from polluting air or influencing the health of operators, the polluted soil in the holes is temporarily exposed in the air only when the soil is taken out, the polluted air with raised dust and peculiar smell can be generated in the soil, the dustproof and odor-inhibiting device 3 sprays the odor inhibitor or the dustproof inhibitor into the protective cylinder 21, the polluted soil can be prevented from polluting the air, and the soil taking process is safer and more environment-friendly.
In a preferred or alternative embodiment, the casing 21 is detachably connected to the soil sampling device body 11;
and/or the outer wall surface of the earth boring tool 12 can be attached to the inner wall surface of the casing 21.
Specifically, when the pile casing is buried, the pile casing 21 can be directly connected to the soil taking device body 11 and screwed into soil, other large-scale equipment is not needed, and the construction efficiency is high; the soil sampling device body 11 may be a drilling machine and the casing 21 may be connected to the driver of the drilling machine. The outer wall surface of the soil sampling drilling tool 12 can be attached to the inner wall surface of the protective cylinder 21, so that the tightness of the soil sampling process can be ensured, and the polluted soil is prevented from generating dust and peculiar smell to pollute the air.
In a preferred or alternative embodiment, the sealing casing device 2 comprises at least two casings 21, and at least two casings 21 are connected end to end in sequence. When contaminated soil is darker, set up a plurality of casings 21 of protecting of mutual detachable and can screw in many times, can prevent to protect a casing 21 length longer and increase the transportation degree of difficulty and the construction degree of difficulty.
In a preferred or alternative embodiment, the soil sampling drill 12 comprises a receiving box 121 and a drill bit 122, the drill bit 122 is rotatably connected with the soil sampling device body 11, the receiving box 121 is fixedly connected with the soil sampling device body 11, a part of the drill bit 122 is arranged in the receiving box 121 and can rotate relative to the receiving box 121 in the axial direction of the drill bit 122, and soil can be screwed into the receiving box 121 when the drill bit 122 drills into the soil.
In a preferred or alternative embodiment, the bottom of the accommodating box 121 is provided with a through hole 123, and the section of the drill 122 outside the accommodating box 121 is provided with a cover plate 124, and the cover plate 124 and the drill 122 can rotate synchronously and can cover the through hole 123.
Specifically, as shown in fig. 2-3, both fig. 2 and 3 are upside down, during the soil drilling process, the soil is loosened by the rotation of the drill 122, during the downward movement of the soil sampling drill 12, the soil enters the accommodating box 121 through the through hole 123 for temporary storage, the soil sampling drill 12 is lifted up after the accommodating box 121 is full, the bottom and the middle of the accommodating box 121 may be pivotally connected, after the soil sampling drill 12 is lifted above the ground, the bottom of the accommodating box 121 is opened, the soil is dumped into the closed transport vehicle, and the outer surface of the cover plate 124 is provided with a plurality of drill teeth 125 for drilling the soil.
In a preferred or alternative embodiment, one surface of the cover plate 124 is parallel to the bottom of the container 121, and the through-hole 123 has a smaller area than the area of the surface of the cover plate 124 parallel to the container 121. The cover plate 124 can cover the through hole 123 during the lifting of the earth boring tool 12 to prevent the soil in the housing case 121 from leaking out of the through hole 123.
As a preferred or alternative embodiment, the dust and odor preventing device 3 further comprises a storage unit 32 and a delivery unit 33, the delivery unit 33 communicating the storage unit 32 with the medicament spraying unit 31.
In a preferred or alternative embodiment, the storage unit 32 includes a medicament storage tank 321 and a water storage tank 322;
the conveying unit 33 comprises a stirring tank 331 and a drug injection pump 332, the drug storage tank 321 and the water storage tank 322 are connected in parallel and then are communicated with the stirring tank 331, and the stirring tank 331 is communicated with the drug injection pump 332 through a pipeline 38;
the medicine spraying unit 31 is a telescopic nozzle, and the medicine injection pump 332 is communicated with the telescopic nozzle through a pipeline 38.
Specifically, the odor inhibitor or the dust inhibitor may be stored in the chemical storage tank 321, and the chemical storage tank 321 and the water storage tank 322 are connected in parallel, and are simultaneously introduced into the stirring tank 331 to be stirred and fully mixed, and then pressurized by the injection pump 332 and sprayed into the casing 21 through the chemical spraying unit 31.
In a preferred or alternative embodiment, the telescopic nozzle includes an inner tube 311 and an outer tube 312, the outer tube 312 can be sleeved outside at least a section of the inner tube 311, the inner tube 311 is communicated with the pipeline 38, and the inner wall surface of the outer tube 312 and the outer wall surface of the inner tube 311 are provided with mutually matched threads.
Specifically, when spraying the medicament, the medicament spraying unit 31 needs to go deep into the mouth of the casing along the radial direction of the casing 21, and by adopting the telescopic nozzle, the outer pipe 312 can be fixed on the ground, the inner pipe 311 can extend out to spray the medicament when the medicament needs to be sprayed, and the inner pipe 311 retracts to avoid interfering with the soil sampling drilling tool 12 when the drilling and soil sampling are carried out.
In a preferred or alternative embodiment, the dust-proof and odor-suppressing device 3 further comprises an automatic control integrated system 34, a drug injection switch 35, a flow sensor 36 and a pressure gauge 37 are disposed on the pipeline 38 between the drug injection pump 332 and the drug spraying unit 31, and the drug injection pump 332, the flow sensor 36, the pressure gauge 37 and the drug spraying unit 31 are all electrically connected to the automatic control integrated system 34. Can transmit pressure signal, flow signal and drive signal to automatic control integrated system 34 for the process of spraying the medicament can be more accurate, and the response is quicker, volatilizees with the reduction of digging and getting contaminated soil in-process raise dust or peculiar smell.
The closed contaminated soil borrowing system provided by the invention adopts a fully-closed cab, the closed cab is provided with an automatic air supply and exhaust device, the air supply device adopts a compressed air bottle, the top of the cab is provided with an automatic air exhaust device, an operation interface is operated to give an early warning indication when the concentration of pollutants in the cab is too high in the process of borrowing contaminated soil, and a driver can open the air supply device according to needs to purify the air in the cab so as to achieve the concentration of the operation environment of the driver. Meanwhile, in view of the particularity of polluted soil treatment, if the detection value of the atmospheric environment in the soil taking process exceeds the standard, the operators in the soil taking area are equipped with safety equipment such as protective clothing, gas masks and safety goggles to ensure the health and safety of field operation.
The method for carrying out soil borrowing replacement repair by using the closed soil borrowing system for the polluted soil provided by any embodiment of the invention comprises the following steps:
step A: leveling a field, and determining the center of a hole site; tamping the position of equipment, accurately determining the center of a hole site by using a coordinate lofting function through a total station, fixing the position of a cross pile, measuring the ground elevation through a level gauge, retesting the measured hole site, controlling the error within a specified range, and ensuring that the polluted site is contained in the drilling range.
And B: embedding a pile casing 21, installing the pile casing 21 on the soil sampling device body 11, and driving the pile casing 21 to drill into soil by using the soil sampling device body 11; and aligning the central axis of the pile casing with the center of the hole site to be measured, embedding the pile casing 21, arranging a cross pile, and rechecking the verticality of the drill rod by using a total station. And controlling the vertical accuracy deviation of the formed hole to be not more than 3 per thousand, preferably, the diameter of the protective cylinder 21 is 20-30 cm larger than the designed hole diameter of the drilled hole, and the upper opening of the protective cylinder 21 is about 20cm higher than the ground.
And C: drilling and taking out soil, detaching the pile casing 21 from the soil taking device body 11, drilling the soil taking drilling tool 12 into the soil in the pile casing 21, and loading the polluted soil into the soil taking drilling tool 12 to be taken out to the ground; the pile foundation position is rechecked before drilling, the soil sampling drilling tool 12 is aligned with the hole position, the rotation speed is controlled after the verticality of the equipment is adjusted, slow drilling is started, the soil quality is found out by sampling from the accommodating box 121 when the drilling is carried out for 2m or the stratum change position, the soil sampling drilling tool is checked with design data, the drilling tool 12 to be sampled can be accelerated after completely entering the stratum, the verticality, the drilling depth and other parameters of a drilling rod are adjusted and controlled by a hydraulic control system in the drilling process, and a hole cleaning drill bit is used for cleaning the hole after the drilling and soil sampling, so that the pollution-free soil residue at the bottom of the.
Step D: unloading the polluted soil, namely dumping the polluted soil in the soil taking drilling tool 12 into the closed transport vehicle 4 for storage; after the soil is filled in the soil-taking drilling tool 12, the cover plate 124 covers the through hole 123, the drill bucket is lifted to the ground, and the polluted soil is discharged into the closed transport vehicle 4.
Step E: spraying an odor inhibitor or a dust inhibitor; if the soil polluted by volatile organic compounds has obvious peculiar smell or dust, after the soil taking drilling tool 12 is lifted to the ground, a certain amount of smell inhibitor or dust inhibitor can be sprayed into the drill hole through the medicament spraying unit 31.
Step F: backfilling clean soil, namely backfilling the clean soil into the protective cylinder and tamping the clean soil in layers; checking and confirming the embedding depth and verticality of the casing 21 in the drilled hole, and connecting the metering feeding device with the upper opening of the underground sealed casing device. Shoveling clean soil into a metering and feeding device by using a loader, feeding the clean soil into a protective cylinder 21 through the metering and feeding device, backfilling the clean soil into a drilled hole, and compacting the soil by using a vibration compactor; the backfilled clean soil is paved in layers, and the paving thickness of each layer is controlled within 300 mm.
Step G: pulling the protective cylinder 21, backfilling clean soil, connecting the soil taking device body 11 with the protective cylinder 21, and pulling out the protective cylinder 21; when the clean soil in the drill hole is backfilled to the designed elevation, the soil taking device body 11 is used for pulling up the protective cylinders 21 one by one.
Step H: backfilling the hole opening, and backfilling clean soil until the soil is level to the ground and tamping; after the protective cylinder 21 is completely pulled out, the backfilling soil surface is below the ground elevation, and the upper part of the backfilling soil is backfilled by clean soil.
Step I: leveling the field;
step J: transporting and repairing the polluted soil, namely transporting the polluted soil in the closed transport vehicle to an ex-situ repair system for treatment;
repeating the step C and the step D until clean soil is dug out, then performing the step F, and fixedly connecting the pile casing 21 to be embedded with the previous pile casing 21 and then embedding when the step B is repeated;
repeating the step A to the step H to drill holes and take soil at different positions within the pollution range, and replacing the soil within the pollution range;
step I is carried out after the soil within the pollution range is replaced, and a field within the pollution range is paved;
and D, restoring the polluted soil in the step J after replacing the soil in the pollution range.
In a preferred or alternative embodiment, when the hole position center is determined in the step A, the adjacent drill holes are mutually meshed; and/or, when the step A is repeated, the center of the hole position of the drilled hole is square. Can ensure that the soil in the pollution range is completely replaced, the total occlusion area of the pollution site is 20-50 percent, and figure 6 is an embodiment of one occlusion mode.
As a preferred or alternative embodiment, after the soil in the first hole 5 is repaired, the soil in the second hole 6 is repaired, and a gap is formed between the first hole 5 and the second hole 6; and after the soil in the second hole 6 is repaired, repairing the soil in the third hole 7, wherein the third hole 7 is positioned in the gap between the first hole 5 and the second hole 6 and is mutually occluded with the first hole 5 and the second hole 6. The concrete construction sequence is shown in fig. 5, which can ensure that the soil in the pollution range is completely replaced.
In a preferred or alternative embodiment, the drilling depth is L, the drilling verticality is K, and the drilling occlusion thickness is d, which satisfy the following conditions: d-2KL is more than or equal to 50 mm;
and/or the meshing area between the adjacent drill holes is S0, the central angle of the meshing surface is theta (the theta angle is shown in figure 5), the sector area of the theta is S1, the triangular area of the theta is S2, and the meshing area between the adjacent drill holes satisfies the following conditions: s0 ═ (S1-S2) × 2.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connection (such as riveting and welding), of course, the mutual fixed connection can also be an integral structure (for example, the mutual fixed connection is manufactured by casting and integral forming instead (except that the integral forming process can not be adopted obviously).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A closed soil sampling system for polluted soil is characterized by comprising a closed soil sampling device, a sealed casing protecting device and a dustproof odor inhibiting device; wherein the content of the first and second substances,
the sealed cylinder protecting device comprises a cylinder, and the cylinder is of a cylindrical structure and can be buried in the polluted soil;
the closed soil sampling device comprises a soil sampling device body and a soil sampling drilling tool, and the soil sampling drilling tool can drill into the soil in the pile casing and can take out the soil in the pile casing;
dustproof device of suppressing flavor includes that the medicament sprays the unit, the medicament sprays the unit and can stretch into protect a section of thick bamboo oral area.
2. The closed contaminated soil sampling system according to claim 1, wherein the casing is detachably connected to the soil sampling device body;
and/or the outer wall surface of the soil sampling drilling tool can be attached to the inner wall surface of the casing.
3. The closed contaminated soil borrowing system according to claim 1, wherein the soil borrowing drill comprises a containing box and a drill bit, the drill bit is rotatably connected with the soil borrowing device body, the containing box is fixedly connected with the soil borrowing device body, a part of section of the drill bit is arranged in the containing box and can rotate relative to the containing box in the axial direction of the drill bit, and the drill bit can screw soil into the containing box when drilling into the soil.
4. The closed contaminated soil sampling system according to claim 1, wherein the dust-proof and odor-inhibiting device further comprises a storage unit and a delivery unit, and the delivery unit communicates the storage unit with the chemical spraying unit.
5. The closed contaminated soil borrowing system according to claim 4, wherein the storage unit comprises a drug storage tank and a water storage tank;
the conveying unit comprises a stirring tank and a drug injection pump, the drug storage tank and the water storage tank are connected in parallel and then are communicated with the stirring tank, and the stirring tank is communicated with the drug injection pump through a pipeline;
the medicament spraying unit is a telescopic spray head, and the medicament injection pump is communicated with the telescopic spray head through a pipeline.
6. The closed contaminated soil sampling system according to claim 5, wherein the dustproof and odor-suppression device further comprises an automatic control integrated system, a drug injection switch, a flow sensor and a pressure gauge are arranged on the pipeline between the drug injection pump and the drug spraying unit, and the drug injection pump, the flow sensor, the pressure gauge and the drug spraying unit are all electrically connected with the automatic control integrated system.
7. A soil borrowing replacement and restoration method using the closed soil borrowing system for contaminated soil according to any one of claims 1 to 6, wherein the method comprises the following steps:
step A: leveling a field, and determining the center of a hole site;
and B: embedding a pile casing, installing the pile casing on a soil taking device body, and driving the pile casing to drill into soil by using the soil taking device body;
and C: drilling and taking soil, detaching the pile casing from the soil taking device body, drilling the soil taking drilling tool into the soil in the pile casing, and loading the polluted soil into the soil taking drilling tool to be taken above the ground;
step D: unloading the polluted soil, namely dumping the polluted soil in the soil taking drilling tool into a closed transport vehicle for storage;
step E: spraying an odor inhibitor or a dust inhibitor;
step F: backfilling clean soil, namely backfilling the clean soil into the protective cylinder and tamping the clean soil in layers;
step G: pulling the protective cylinder, connecting the soil taking device body with the protective cylinder after backfilling clean soil, and pulling out the protective cylinder;
step H: backfilling the hole opening, and backfilling clean soil until the soil is level to the ground and tamping;
step I: leveling the field;
step J: transporting and repairing the polluted soil, namely transporting the polluted soil in the closed transport vehicle to an ex-situ repair system for treatment;
repeating the step C and the step D until clean soil is dug out, then performing the step E, and fixedly connecting the pile casing to be embedded with the previous pile casing when the step B is repeated, and then embedding;
repeating the step A to the step H to drill holes and take soil at different positions within the pollution range, and replacing the soil within the pollution range;
step I is carried out after the soil within the pollution range is replaced, and a field within the pollution range is paved;
and D, restoring the polluted soil in the step J after replacing the soil in the pollution range.
8. The method of claim 7, wherein adjacent boreholes bite into each other when the determination of the center of the borehole is made in step a; and/or when the step A is repeated, the hole site centers of the drilled holes are distributed in a square shape.
9. The soil borrowing replacement repair method according to claim 7, wherein after the soil in the first hole is repaired, the soil in the second hole is repaired, and a gap is formed between the first hole and the second hole; and after the second hole is repaired, repairing the soil in the third hole, wherein the third hole is positioned in the gap between the first hole and the second hole and is mutually occluded with the first hole and the second hole.
10. The soil borrowing replacement repair method according to any one of claims 8 or 9, wherein the depth of the drilled hole is L, the verticality of the drilled hole is K, and the occlusion thickness of the drilled hole is d, which satisfy the following requirements: d-2KL is more than or equal to 50 mm;
and/or the meshing area between the adjacent drill holes is S0, the central angle of the meshing surface is theta, the sector area of the theta is S1, the triangular area of the theta is S2, and the meshing area between the adjacent drill holes satisfies the following conditions: s0 ═ (S1-S2) × 2.
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| CN112404112A (en) * | 2020-09-30 | 2021-02-26 | 广州草木蕃环境科技有限公司 | Layered replacement and restoration method for mercury-polluted farmland |
| CN113653068A (en) * | 2021-09-08 | 2021-11-16 | 中建八局第二建设有限公司 | Construction method of deep foundation pit support based on upper soft and lower hard rock stratum |
| CN115846384A (en) * | 2022-12-08 | 2023-03-28 | 森特士兴环保科技有限公司 | Ectopic remediation ultra-deep distribution contaminated soil minimally invasive dredging method |
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