CN113317164B - Method and device for improving planting soil by in-situ solidification of river and lake bottom mud - Google Patents
Method and device for improving planting soil by in-situ solidification of river and lake bottom mud Download PDFInfo
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- CN113317164B CN113317164B CN202110673928.6A CN202110673928A CN113317164B CN 113317164 B CN113317164 B CN 113317164B CN 202110673928 A CN202110673928 A CN 202110673928A CN 113317164 B CN113317164 B CN 113317164B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/60—Apparatus for preparing growth substrates or culture media
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
- A01G24/12—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material containing soil minerals
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
- C05D9/02—Other inorganic fertilisers containing trace elements
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Soil Sciences (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Inorganic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method and a device for in-situ solidification and improvement of planting soil of river and lake bottom mud, which comprise a solidification stack, wherein a water collecting device is arranged in the solidification stack, the water collecting device comprises a top pipeline, a plurality of branch pipelines, an annular pipeline and a drainage pipeline, the plurality of branch pipelines are distributed in an umbrella rib shape, one ends of the plurality of branch pipelines are converged and connected with the top pipeline, the other ends of the plurality of branch pipelines are connected to the annular pipeline in a scattered manner, and one side of the annular pipeline is connected with the drainage pipeline; the plurality of branch pipelines and the annular pipeline are respectively provided with a plurality of small holes, the interiors of the plurality of branch pipelines and the annular pipeline are respectively provided with a drainage assembly, and the exteriors of the branch pipelines and the annular pipeline are wrapped with outer geotextiles; the device has the advantages of reasonable structure, convenient construction and installation and low cost, has the function characteristics of simultaneously promoting soil body drainage and solidified soil improvement, and is particularly suitable for dredging and recycling river sediment of nearby farmlands.
Description
Technical Field
The invention relates to the technical field of planting soil, in particular to a method and a device for in-situ solidification and improvement of planting soil by river and lake bottom mud.
Background
River bottom and lake bottom often produce a large amount of lake bottom silt, and in the face of such a large amount of silt, traditional treatment methods often adopt simple stacking and natural drying, and on one hand, the method needs a large amount of places to stack the silt, and natural drying usually lasts for a long time, and on the other hand, the method also can cause a large amount of waste of resources under the condition of limited urban land area, and on the other hand, secondary pollution can be generated to a stacking area in the stacking process.
The organic fertilizer is prepared by composting and fermenting sludge, but the method for treating the different places is not the first choice of engineering projects because of relatively high production cost, and the in-situ solidification treatment is a widely adopted method in production. The lake bottom sludge is solidified into mud cakes with good engineering properties by adding the curing agent, and is used for filling materials and the like of engineering, and common curing agents include cement, steel mill waste residues, fly ash and the like. The sludge at the river bottom and the lake bottom is subjected to the long-term sedimentation, the organic matter and nutrient contents are high, and the surrounding vegetation and soil are often damaged greatly in the construction process of the tunnel at the river bottom and the lake bottom, so that the sludge is converted into garden planting soil, on one hand, the sludge treatment problem is solved, the safe disposal and the resource perpetual utilization of the sludge are realized, and on the other hand, the planting soil converted from the sludge with high organic matter content is also beneficial to the recovery of damaged vegetation in the tunnel construction process.
For example, chinese patent application (publication No. CN 105210718A) discloses a planting soil prepared by solidifying silt, a preparation method and application thereof, and discloses application of the planting soil prepared by solidifying silt to vegetation planting. In the process of solidifying the sludge, how to accelerate the solidification speed and the dewatering effect of the sludge is also important, and corresponding special equipment needs to be designed.
In addition, when the existing silt is solidified and used as planting soil, the modifier is applied by equipment alone, and the modifier is difficult to enter the solidified soil.
Disclosure of Invention
The invention aims at solving the problems existing in the prior art and provides a method and a device for in-situ solidification and improvement of planting soil by river and lake sediment.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the river and lake bottom mud in-situ solidification improved planting soil device comprises a solidification stack, wherein a water collecting device is arranged in the solidification stack and comprises a top pipeline, a plurality of branch pipelines, an annular pipeline and a drainage pipeline, the branch pipelines are distributed in an umbrella rib shape, one ends of the branch pipelines are converged and connected with the top pipeline, the other ends of the branch pipelines are connected to the annular pipeline in a scattered manner, and one side of the annular pipeline is connected with the drainage pipeline; the water draining device comprises a plurality of branch pipelines and annular pipelines, wherein the branch pipelines and the annular pipelines are respectively provided with a plurality of small holes, the interiors of the branch pipelines and the annular pipelines are respectively provided with a water draining component, and the exteriors of the branch pipelines and the annular pipelines are wrapped with outer geotextiles.
The device has the advantages of reasonable structure, convenient construction and installation and low cost, has the function characteristics of promoting soil drainage and improving solidified soil, and solves the contradiction between the high-efficiency dehydration requirement of the solidified soil and the good water-retaining property of the planting soil in the technical process of in-situ solidification construction and resource utilization of the bottom mud; is especially suitable for dredging and recycling river sediment in the nearby farmland.
Through the setting of catchment device makes the bed mud when the normal position solidification, can discharge water, steam etc. in the earth stack, and discharge rate and efficiency are better, are favorable to solidification molding and stew the requirement that expects the dehydration.
The branch pipeline and the annular pipeline that rib column distributed can cover most space in the solidification stack, and water can get into the pipeline inside from these apertures under the effect of drainage subassembly, temperature and pressure, liquid bright water can follow drainage pipe discharges, gaseous or absorptive moisture can also follow under the transpiration of high temperature the top pipeline discharges to the effectual moisture with earth stack is inside discharges.
In actual operation, the bottom mud and the curing agent are uniformly mixed and stirred, the pile mud is drained, the water collecting device is embedded into the soil pile, the material is stewed for 24-48 hours, the top pipeline exposes out of the highest point of the soil pile, and clear water is collected through the drainage pipeline at the bottom.
Further, the drainage component is plant straw and/or sponge filled in the pipeline of the water collecting device, and the plant straw and/or the sponge are wrapped by water permeable geotextile.
The plant straw and the sponge can effectively absorb moisture in the soil stack, and the moisture is transferred and gradually discharged.
The plant straw or the sponge can be in a block or beam shape, is wrapped by the permeable geotextile, and then is arranged in a pipeline, or can be in a whole structure; the arrangement of the permeable geotechnical cloth can wrap the scattered straws, so that the straws are prevented from entering the soil pile from the small holes, and meanwhile, the permeable geotechnical cloth also has the permeable performance, and the discharge of moisture is not influenced.
The arrangement of the outer geotextile can protect the pipelines on one hand and improve the affinity with soil on the other hand, and does not collapse.
Further, the small holes are uniformly and equidistantly arranged on the branch pipeline and the annular pipeline.
Further, the inner diameter of the branch pipeline is 2-3 cm, and the diameter of the small hole is 0.3-0.7 cm; the inner diameter of the annular pipeline is larger than that of the branch pipeline, and the inner diameter of the drainage pipeline is not smaller than that of the branch pipeline. The arrangement of this structure facilitates drainage.
Further, the top pipeline is vertically arranged, and the annular pipeline and the drainage pipeline are horizontally arranged.
Further, the top pipeline upwards passes through the top of the solidified stack, the annular pipeline is positioned below the solidified stack, and one end of the drainage pipeline passes through the lower side edge of the solidified stack.
Further, the top pipeline, the branch pipeline, the annular pipeline and the drainage pipeline are all metal drainage pipes or hard plastic drainage pipes.
Further, the annular pipeline is circular or elliptical or oval.
Further, the top pipeline and the drainage pipeline positioned in the inner part of the solidified stack are respectively provided with a drainage component, and the outer part of the drainage component is also wrapped with an outer geotextile.
Further, the top pipeline is a drainage pipeline and/or an exhaust pipeline; or the top pipeline is a liquid modifier adding pipeline, and the liquid modifier is one or more of ammonium polyacrylate solution, ferrous sulfate solution and ferrous sulfate solution.
When soil is required to be improved after the soil is stewed and solidified, the water collecting device can be used as a liquid modifier adding pipeline, after the modifier is added from the top pipeline, the modifier permeates and flows in the branch pipeline and the annular pipeline, and enters the solidified stack from the small holes, so that the effect of improving the soil in the stack is achieved, the bottom drainage pipeline can be closed, or forward pressure is applied to the water outlet holes (overflow holes) of the drainage pipeline, and the modifier is accelerated to permeate into the soil.
A method for in-situ solidification of river and lake bottom mud for improving planting soil comprises the following steps:
step one, uniformly mixing and stirring bottom mud and a curing agent, and preparing mud piling and draining;
embedding a water collecting device into the soil pile in the soil pile draining process, exposing part of pipelines at the top of the soil pile, arranging a drain pipe at the bottom of the soil pile, and stewing materials for 24-48 hours to form a solidified pile; when stewing materials, the bottom drain pipe collects clear water;
step three: and (3) carrying out soil improvement on the solidified stacks completed by stewing, taking the water collecting device as a pipeline for adding and dispersing a liquid modifier, adding the liquid modifier through a pipeline at the top, and simultaneously applying forward pressure to overflow holes at the bottom.
The method can realize in-situ solidification of the river and lake sediment and improve the sediment into the planting soil, is simple and easy, and solves the contradiction between the high-efficiency dehydration requirement of the solidified soil and the good water retention of the planting soil in the technical process of in-situ solidification construction and resource utilization of the sediment. Is especially suitable for dredging and recycling river sediment in the nearby farmland. The device has the advantages that the adding of the curing agent and the adding of the liquid modifying agent can be separated, other liquid can not be added in the process of the curing agent to act, interference and conflict between the modifying agent and the curing agent are avoided, and the liquid modifying agent added later has a good modifying effect. In the improvement process, the soil pile is not required to be scattered and mixed with other additives, the operation is more convenient, and the improvement efficiency is higher.
Compared with the prior art, the invention has the beneficial effects that: 1. the device has the advantages of reasonable structure, convenient construction and installation and low cost, has the function characteristics of promoting soil drainage and improving solidified soil, and solves the contradiction between the high-efficiency dehydration requirement of the solidified soil and the good water-retaining property of the planting soil in the technical process of in-situ solidification construction and resource utilization of the bottom mud; the method is particularly suitable for dredging and recycling river bottom mud of farmlands nearby; 2. the water collecting device is arranged, so that when the bottom mud is solidified in situ, water vapor and the like in the soil stack can be discharged, the discharge speed and the discharge efficiency are good, and the requirements of solidification molding and stewing dehydration are met; 3. the branch pipelines and the annular pipelines which are distributed in an umbrella rib shape can cover most of the space in the solidified stack, and water can improve the discharge of water in the solidified stack under the action of the drainage component, the temperature and the pressure; 4. the plant straws and the sponge can effectively absorb and discharge water in the soil stacks, and the water-permeable geotechnical cloth can wrap the scattered straws, so that the straws are prevented from entering the soil stacks from the small holes, and meanwhile, the water-permeable soil stacks have water permeability and do not influence the discharge of water; 5. the water collecting device can be used as a water draining function and also can be used as an improver adding channel for improving the subsequent soil quality so as to effectively improve the soil quality after stewing.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a river and lake sediment in-situ solidification improved planting soil device;
FIG. 2 is a schematic cross-sectional view of a pipeline according to the present invention;
in the figure: 1. curing and stacking; 2. a top line; 3. a branch pipeline; 4. an annular pipeline; 5. a drainage pipeline; 6. a small hole; 7. an outer geotextile layer; 8. water permeable geotextile; 9. plant stalks.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.
Embodiment one:
as shown in fig. 1 and fig. 2, an in-situ solidification improved planting soil device for river and lake bottom mud comprises a solidification stack 1, wherein a water collecting device is arranged in the solidification stack 1 and comprises a top pipeline 2, a plurality of branch pipelines 3, an annular pipeline 4 and a drainage pipeline 5, the plurality of branch pipelines 3 are distributed in an umbrella rib shape, one ends of the plurality of branch pipelines 3 are gathered and connected with the top pipeline 2, the other ends of the branch pipelines are connected to the annular pipeline 4 in a dispersed manner, and one side of the annular pipeline 4 is connected with the drainage pipeline 5; a plurality of small holes 6 are respectively arranged on the branch pipelines 3 and the annular pipelines 4, drainage assemblies are respectively arranged in the branch pipelines 3 and the annular pipelines 4, and outer geotechnical cloth 7 is wrapped outside the drainage assemblies.
The device has the advantages of reasonable structure, convenient construction and installation and low cost, has the function characteristics of promoting soil drainage and improving solidified soil, and solves the contradiction between the high-efficiency dehydration requirement of the solidified soil and the good water-retaining property of the planting soil in the technical process of in-situ solidification construction and resource utilization of the bottom mud; is especially suitable for dredging and recycling river sediment in the nearby farmland.
Through the setting of catchment device makes the bed mud when the normal position solidification, can discharge water, steam etc. in the earth stack, and discharge rate and efficiency are better, are favorable to solidification molding and stew the requirement that expects the dehydration.
The branch pipelines 3 and the annular pipelines 4 distributed in the umbrella rib shape can cover most of the space in the solidification stack 1, water can enter the pipelines from the small holes 6 under the action of the drainage component, the temperature and the pressure, liquid bright water can be discharged from the drainage pipeline 5, and gaseous or absorbed water can be discharged from the top pipeline 2 under the high-temperature transpiration, so that the water in the soil stack is effectively discharged.
In actual operation, the bottom mud and the curing agent are uniformly mixed and stirred, the pile mud is drained, the water collecting device is embedded into the soil pile, the material is stewed for 24-48 hours, the top pipeline exposes out of the highest point of the soil pile, and clear water is collected through the drainage pipeline 5 at the bottom.
Further, the drainage component is plant straw 9 filled in the branch pipeline 3 and the annular pipeline 4 of the water collecting device, and water permeable geotechnical cloth 8 is wrapped outside the plant straw 9.
The plant straw 9 can be in a block or beam shape, is wrapped by the water-permeable geotextile 8 and then is arranged in a pipeline, or can be in a whole structure; the arrangement of the permeable geotechnical cloth 8 can wrap the scattered straws, so that the straws are prevented from entering the soil pile from the small holes, and meanwhile, the permeable geotechnical cloth has the permeable performance and does not influence the discharge of moisture.
The arrangement of the outer geotextile 7 can protect the pipelines on one hand and improve the affinity with soil on the other hand, and does not collapse.
Further, the small holes 6 are uniformly and equally arranged on the branch pipeline 3 and the annular pipeline 4.
Further, the inner diameter of the bypass pipeline 3 is 2.5cm, and the diameter of the small hole is 0.5cm; the inner diameter of the annular pipeline 4 is larger than the inner diameter of the branch pipeline 3, and the inner diameter of the drainage pipeline 5 is not smaller than the inner diameter of the branch pipeline 3. The arrangement of this structure facilitates drainage.
Further, the top pipeline 2 is vertically arranged, and the annular pipeline 4 and the drainage pipeline 5 are horizontally arranged.
Further, the top pipeline 2 passes through the top of the solidified stack 1, the annular pipeline 4 is located below the solidified stack 1, and one end of the drainage pipeline 5 passes through the lower side of the solidified stack 1.
Further, the top pipeline 2, the branch pipeline 3, the annular pipeline 4 and the drainage pipeline 5 are all hard plastic drainage pipes.
Further, the annular pipeline 4 is in a circular shape.
Further, the inside of the top pipeline 2 and the drainage pipeline 5 which are positioned in the inner part of the solidified stack 1 are respectively provided with a drainage component, and the outside is also wrapped with an outer geotextile.
Embodiment two:
the present embodiment provides another method of using the catchment device of embodiment one.
The top pipeline 2 is a liquid modifier adding pipeline, and the liquid modifier is an ammonium polyacrylate solution.
When soil is required to be improved after the soil is stewed and solidified, the water collecting device can also be used as a liquid modifier adding pipeline, after the modifier is added from the top pipeline 2, the modifier permeates and flows in the branch pipeline 3 and the annular pipeline 4, and enters the solidified stack 1 from the small holes 6, so that the effect of improving the soil in the stack is achieved, the bottom of the water discharging pipeline 5 can be sealed, or forward pressure is applied to water outlets (overflow holes) of the water discharging pipeline 5 to accelerate the modifier to permeate into the soil in order to ensure the effect of modifier adding.
Embodiment III:
a method for in-situ solidification of river and lake bottom mud for improving planting soil comprises the following steps:
step one, uniformly mixing and stirring bottom mud and a curing agent, and preparing mud piling and draining;
embedding a water collecting device into the soil pile in the soil pile draining process, exposing part of pipelines at the top of the soil pile, arranging a drain pipe at the bottom of the soil pile, and stewing materials for about 48 hours to form a solidified pile; when stewing materials, the bottom drain pipe collects clear water;
step three: and (3) carrying out soil improvement on the solidified stacks completed by stewing, taking the water collecting device as a pipeline for adding and dispersing a liquid modifier, adding the liquid modifier through a pipeline at the top, and simultaneously applying forward pressure to overflow holes at the bottom.
The method can realize in-situ solidification of the river and lake sediment and improve the sediment into the planting soil, is simple and easy, and solves the contradiction between the high-efficiency dehydration requirement of the solidified soil and the good water retention of the planting soil in the technical process of in-situ solidification construction and resource utilization of the sediment. Is especially suitable for dredging and recycling river sediment in the nearby farmland.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The device for in-situ solidification and improvement of planting soil of river and lake bottom mud is characterized by comprising a water collecting device arranged in a solidification stack, wherein the water collecting device comprises a top pipeline, a plurality of branch pipelines, an annular pipeline and a drainage pipeline, the plurality of branch pipelines are distributed in an umbrella rib shape, one ends of the plurality of branch pipelines are converged and connected with the top pipeline, the other ends of the branch pipelines are connected to the annular pipeline in a scattered manner, and one side of the annular pipeline is connected with the drainage pipeline; the plurality of branch pipelines and the annular pipeline are respectively provided with a plurality of small holes, the interiors of the plurality of branch pipelines and the annular pipeline are respectively provided with a drainage assembly, and the exteriors of the branch pipelines and the annular pipeline are wrapped with outer geotextiles;
the drainage component is plant straw and/or sponge filled in a pipeline of the water collecting device, and the plant straw and/or the sponge are wrapped by water permeable geotextile;
the inner diameter of the branch pipeline is 2-3 cm, and the diameter of the small hole is 0.3-0.7 cm; the inner diameter of the annular pipeline is larger than that of the branch pipeline, and the inner diameter of the drainage pipeline is not smaller than that of the branch pipeline;
the top pipeline is vertically arranged, and the annular pipeline and the drainage pipeline are horizontally arranged;
the top pipeline and the drainage pipeline which are positioned in the inner part of the solidified stack are respectively provided with a drainage component, and the outside is also wrapped with an outer geotextile.
2. The apparatus for in-situ solidification of river and lake bottom mud for improving planting soil of claim 1, wherein the small holes are uniformly and equally arranged on the branch pipeline and the annular pipeline.
3. The apparatus for solidifying modified planting soil in situ from river or lake sediment of claim 1 wherein said top pipe extends upwardly out of the top of said solidified stack, said annular pipe is positioned below said solidified stack, and one end of said drainage pipe extends from the lower side of said solidified stack.
4. The apparatus for in-situ solidification of river and lake bottom mud for improving planting soil of claim 1, wherein the top pipeline, the branch pipeline, the ring pipeline and the drainage pipeline are all metal drainage pipes or hard plastic drainage pipes.
5. The apparatus for in-situ solidification of river and lake bottom mud for improving planting soil of claim 1, wherein the annular pipeline is circular or elliptical or doughnut-shaped.
6. A method for in-situ solidification of river and lake bottom mud to improve planting soil, which is characterized in that the device for in-situ solidification of river and lake bottom mud to improve planting soil is used, and comprises the following steps:
step one, uniformly mixing and stirring bottom mud and a curing agent, and preparing mud piling and draining;
embedding a water collecting device into the soil pile in the soil pile draining process, exposing part of pipelines at the top of the soil pile, arranging a drain pipe at the bottom of the soil pile, and stewing materials for 24-48 hours to form a solidified pile; when stewing materials, the bottom drain pipe collects clear water;
step three: soil improvement is carried out on the solidified stacks completed by stewing, the water collecting device is used as a pipeline for adding and dispersing a liquid modifier, the liquid modifier is added from a pipeline at the top, and meanwhile, forward pressure is applied to overflow holes at the bottom;
the liquid modifier is one or more of ammonium polyacrylate solution, ferrous sulfate solution and ferrous sulfate solution.
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| CN111187047A (en) * | 2020-03-06 | 2020-05-22 | 西南科技大学城市学院 | Method for treating waste sludge |
| CN111153585A (en) * | 2020-03-14 | 2020-05-15 | 中新瑞美(天津)环保科技有限公司 | Environment-friendly dredging and recycling method for polluted bottom mud |
| CN111606542A (en) * | 2020-04-21 | 2020-09-01 | 路德环境科技股份有限公司 | Formula for repairing river and lake silt and method for preparing green soil by using formula |
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