JP3705484B2 - Semi-fluid soil contamination and its incorporation into soil - Google Patents

Description

【００３２】
上記の実施例１に基づき、本発明の半流動状土壌混入材を用いて土壌処理を実施し、土壌処理の施工後２０日経過後に土壌処理を実施した土壌の一部をサンプル採取分析の結果、好ましい土壌処理が完了されていることが確認できた。
この本発明の半流動状土壌混入材を用いて上記の実施例１の条件における土壌処理容量１５０立方メートルの土壌処理は、本発明によるときは所用日数は段取り準備共に３日間で完了したが、従来の土壌処理の工法による場合には通常は１０日間以上の所用日数を必要とするものであるから、土壌処理の施工期間を著しく短縮することができるという効果があり、更に、従来必要とした土壌処理場所として土壌を一旦掘削して土壌処理場所へ搬送する設備や土壌処理スペース、或いは、トラクター等の耕運機等の土壌処理機械器具や処理場所を全く必要としないという効果がある。
【００３３】
【発明の効果】
本発明は上記の如く構成したから、従来ポンプを用いた圧送による機械的移送手段を利用することができなかった土壌混入用の混合材として、その比重が重く又は粒子が大きいために、粒子の重量が大きい混合材であっても、乾燥粉状粘性土と水との所定量を加えて、略均一に混練することにより、ポンプにより圧送可能な半流動性を有するモルタル状の半流動状土壌混入材に形成したから、比重の重い粉体又は粒子が大きく、その重量が大きい混合材を、搬送途中で分離し沈下させることなく、ポンプを用いて圧送するという機械的移送手段によって略均一に直接に土壌中へ混入される半流動状土壌混入材を提供することができるという効果がある。
【００３４】
本発明の半流動状土壌混入材は、土壌への混合材として比重の重い鉄粉等の金属粉を混合材として利用でき、しかもこれをポンプによって圧送可能な半流動性を有するモルタル状に形成してなるものであるから、汚染土壌の浄化処理において、直接に汚染土壌中の任意の深さに混入することができるという効果がある。
【００３５】
本発明の半流動状土壌混入材は、ポンプによって圧送可能な半流動性を有するモルタル状に形成してなるものであるから、土壌処理の深度に応じて任意の処理深さまで掘削浄化処理が可能となるという効果がある。
【００３６】
本発明の半流動状土壌混入材の土壌中への混入方法の工法によるときは、従来汚染土壌の掘削搬送に伴うシートパイル等による囲い込み工事や山留め工事等が全く不要となり、狭い汚染土壌スペースでも土壌処理が容易に可能となり、土壌処理施工期間も著しく短縮され、土壌処理の施工が容易で従来工法に比較して大幅にコストダウンが図られ、土壌処理に用いる使用材料も安価で、かつ、その入手が比較的容易であるという効果がある。
【００３７】
本発明の半流動状土壌混入材の土壌中への混入方法の工法によるときは、土壌処理すべき土壌中に直接に掘削するものであるから、掘削機械やミキサ、コンクリートポンプ等の機械装置が小型ですみ、特殊な機械を必要とせずに現在一般に当業界で使用されているこれらの機械装置がそのまま利用でき、しかも、従来工法における土壌処理する土壌を、一旦掘り上げて土壌処理装置まで搬送するものではなく、直接に土壌中へ混入するものであるから、従来必要であった施工工事に伴う湧水処理が全く不要となり、しかも、残土処分が殆ど必要ないという優れた効果がある。
【図面の簡単な説明】
【図１】本発明の半流動状土壌混入材を形成する装置とその土壌中への混入に用いる掘削機による混入方法を示す斜視図である。
【図２】半流動状土壌混入材を掘削ドリルにより土壌中へ混入する要部の斜視図である。
【図３】半流動状土壌混入材を掘削ドリルで土壌中へ混入する状態を示す要部の斜視図である。
【図４】半流動状土壌混入材を掘削ドリルで土壌中へ混入する状態を示す要部の斜視図である。
【図５】掘削ドリルで土壌中へ半流動状土壌混入材を混入して掘削ドリルを抜き取る状態を示す要部の斜視図である。
【図６】土壌中へ半流動状土壌混入材を混入して土壌中に設けた土柱体を示す要部の断面図である。
【図７】本発明の半流動状土壌混入材における混合材の沈下時間をその混合割合を変えた場合の沈下時間とを比較したデータを示すグラフである。
【符号の説明】
１ 半流動状土壌混入材
２ 混合材
３ 乾燥粉状粘性土
４ 水
５ コンクリートミキサ
６ ホッパー
７ モルタルポンプ
８ 掘削機
９ 高圧ホース
１０ 掘削ドリル
１１ 掘削指示深さ
１２ 土柱体
Ａ 土壌[0001]
[Industrial application fields]
In the present invention, a predetermined amount of dry powdery clay soil, a mixed material for soil mixing, and water is kneaded substantially uniformly and formed into a mortar shape having semi-fluidity so that it can be pumped by a pump. The present invention relates to a semi-fluid soil contaminated material and a method of directly mixing the semi-fluid soil contaminated material into the soil excavated by an excavator by pumping the semi-fluid soil contaminated material.
[0002]
[Prior art]
Conventionally, as a kind of soil mixing material for soil improvement, soil neutralization and other purposes, heavy and heavy manganese powder, iron powder and other metal powders, and garnet sand and other heavy sands such as heavy particles and heavy weight are used. It is used as a mixed material for soil contamination.
[0003]
These mixed materials for soil mixing are heavy in specific gravity or large in size and large in weight, so the required amount is transported almost uniformly to any place by mechanical transfer means such as pumping. Therefore, it is impossible to knead into the soil on the spot. First, the excavated soil was transported to a soil treatment plant, and the soil mixed material was kneaded substantially uniformly into the excavated soil.
[0004]
In this way, it is used for soil contamination that consists of heavy and heavy iron powder and other metal powders used for soil improvement, soil neutralization and other purposes, and garnet sand and other heavy sand particles. Due to the large weight of the mixed material, the necessary amount can be transported almost uniformly to any place by mechanical transfer means such as pumping with a pump, etc., and kneaded directly into the soil on the spot. Therefore, in order to mix these soil-mixing materials into the soil, the soil at the target location should be adjusted to the required depth and area according to soil improvement, soil neutralization and other purposes. After driving a sheet pile or the like and surrounding it, the soil surrounded by the sheet pile or the like by an excavator or the like is once dug up and transported as excavated soil to the ground. Mix of In a soil treatment plant provided on the ground, the material was kneaded substantially uniformly with stirring using a soil treatment machine such as a mixer, and then the excavated soil surrounded by the sheet pile was dug up again. It was to be backfilled in place.
[0005]
[Problems to be solved by the invention]
As a conventional means of ground improvement, a soil treatment method in which a cement-based soil conditioner is pumped into the soil using a pneumatic pump and stirred in the soil, and a cement-based soil conditioner as an aqueous solution is pumped into the soil. A soil treatment method in which the material is conveyed and stirred is used.
However, in any of these conventional methods, the specific gravity (2.6) of the cement-based soil improver is relatively lightweight and the particles are small (particles are about 0.002 to several microns). Because of its small weight, it can be transported by pump using air pressure or water, but iron powder (specific gravity 7.8) or manganese (specific gravity) whose specific gravity is heavier than the specific gravity of this cementitious soil conditioner 7.3) Other metal powders and large particles (particles are about 0.8 mm to 2 mm or less), mixed materials for soil mixing made of garnet sand or other rough sands are heavy in specific gravity or large in weight. Therefore, there is a problem in that mechanical transfer means by pumping using air pressure or water as it is cannot be applied.
[0006]
In other words, for the purpose of soil improvement, soil neutralization and other purposes, conventionally, there has been a mixture material for mixing soil consisting of iron powder and other metal powders having a relatively high specific gravity, and coarse sandy substances such as garnet sand having a large particle size. Generally used, these mixed materials for soil mixing have a heavy specific gravity or large particles, and the weight per particle is large. Therefore, pumps using liquids such as water or compressed air are used. Even if you try to transport it almost uniformly to soil at any place by mechanical transfer means such as by feeding by pressure, it will separate and settle because of its large weight, and it will stay and clog in the middle of transportation There has been a problem that, by pumping with a pump or the like, transfer by a mechanical transfer means cannot be performed substantially uniformly at a time.
[0007]
Conventionally, iron powders and other metal powders with heavy specific gravity, and heavy-mixing materials for mixing with heavy soil consisting of coarse particles such as garnet sand have been applied directly to the soil for soil improvement and In order to agitate and knead in the soil for the purpose of summing and other purposes, the soil mixture and soil spread by a power cultivator or agricultural tractor must be agitated and agitated. In order to spread the mixed material directly on the soil, it is scattered or spilled to the outside due to strong winds, rain, etc., and the spraying depends on natural conditions, and inefficient and uniform stirring and kneading cannot be expected, It was also necessary to cure with sheets. In addition, using a power cultivator, agricultural tractor, etc. for kneading the soil-mixing material and soil requires a considerably long work period depending on the volume of the soil. It requires heavy machinery such as a tractor for kneading the mixed material with soil and the soil, and construction costs are inevitably high, and part of the remaining soil dug up by heavy machinery such as tractors as needed. There was a problem that it had to be transported outside and processed off-site.
[0008]
In addition, the soil for soil improvement, soil neutralization, and other purposes is mixed with heavy soils such as iron powder with high specific gravity and other metal powders, and garnet sand with large particles. In the method of agitating and kneading the material, the soil at the target location is excavated by an excavator or the like and conveyed to a soil treatment plant, and the conveyed excavated soil and the mixed material for mixing the soil are agitated by a mixer or the like. In the case of kneading and refilling the excavation site where the excavated soil is dug up again, it is necessary to mount the site to be excavated with a sheet pile or the like to prevent collapse after excavation.
Excavated soil must be completely covered with a waterproof sheet or the like to prevent runoff or infiltration due to rainfall, if necessary, excavated soil transport device, temporary storage space for transported soil, excavation Excavated soil once transported, requiring soil treatment machinery and soil treatment facilities with soil and mixed materials for soil mixing, and unsuitable for sites where there is not enough space, resulting in longer construction periods and higher construction costs In the area where soil treatment is not possible, a separate soil disposal site is required, and spring water such as groundwater is often generated due to excavation, and there is a problem that spring treatment must be performed.
[0009]
As a result of diligent research on solving the problems in these conventional techniques, the present invention has a heavy soil consisting of heavy sand, such as gunman powder, iron powder and other metal powders having a high specific gravity, and garnet sand having a large particle size. The mixed material for mixing is not limited to the mixed material for soil mixing alone, but is focused on dry powdery viscous soil, and this is used as a medium for semi-fluid material. Knowing that it is possible to obtain a mortar-like semi-fluid soil-mixing material having semi-fluidity that can be pumped by a pump by adding water to the dry powdery clay and mixing it almost uniformly. The object is to provide a semi-fluid soil-mixing material and a method for mixing it into the soil.
[0010]
[Means for Solving the Problems]
In the present invention, a heavy mixed material for soil mixing made of iron powder or other metal powders with a high specific gravity or a coarse sandy material such as garnet sand having a large particle size is used alone to reduce air pressure or water. Even if it is pumped by using a pump, it is heavy and separates and settles and stays in the middle of transportation and becomes clogged. A predetermined amount of dry powdery clay and water is added to the mixing material for mixing, and the mixture is kneaded substantially uniformly to form a mortar-like semi-fluid soil-containing material that has semi-fluidity. It is made possible.
Furthermore, while the semi-fluid soil-contaminated material obtained in this way is pumped to the excavator by a pump and the excavator excavates the soil to an arbitrary depth, the semi-fluid soil-contaminated material is simultaneously removed from the soil. It is a method of mixing in.
[0011]
The semi-fluid soil-mixing material of the present invention is formed into a mortar shape having semi-fluidity by kneading a predetermined amount of dry powdery viscous soil, a mixed material for soil mixing, and water substantially uniformly. Thus, it can be pumped by a pump.
[0012]
Furthermore, the semi-fluid soil-contaminated material of the present invention comprises a predetermined amount of a slightly alkaline or neutral dry powdery clay soil, a soil-mixing material, and water in a weight ratio of 05: 1: 05. It is kneaded substantially uniformly, formed into a mortar shape having semi-fluidity, and can be pumped by a pump.
[0013]
Furthermore, the semi-fluid soil-contaminated material of the present invention is a mixture consisting of a fine powdery, weakly alkaline or neutral dry powdery viscous soil, and a heavy metal powder for soil contamination or a rough sandy material such as garnet sand. A predetermined amount of the material and water in a ratio of 05: 1: 05 are kneaded substantially uniformly to form a semi-fluid mortar that can be pumped by a pump.
[0014]
Further, the semi-fluid soil-mixing material of the present invention is a fine powdery weakly alkaline or neutral dry powdery viscous soil, a heavy iron powder mixture material for soil mixing, and water in a weight ratio of 05 each. A predetermined amount is kneaded substantially uniformly at a ratio of 1:05, formed into a mortar shape having semi-fluidity, and can be pumped by a pump.
[0015]
The method of mixing the semi-fluid soil mixed material of the present invention into the soil is that a predetermined amount of dry powdery clay soil, a mixed material for soil mixing, and water can be kneaded substantially uniformly and pumped by a pump. Forming a mortar-like semi-fluid soil admixture having a semi-fluidity, and then pumping the semi-fluid soil admixture to the excavator by a pump, and the soil to an arbitrary depth by the excavator Simultaneously with excavation, the semi-fluid soil-containing material is mixed into the soil.
[0016]
In addition, the method of mixing the semi-fluid soil mixed material of the present invention into the soil is a weakly alkaline or neutral dry powdery viscous soil, a mixed material for soil mixing, and water, each having a weight ratio of 0.5. A predetermined amount at a ratio of 1: 0.5 is kneaded substantially uniformly with a mixer to form a mortar-like semi-fluid soil-containing material having semi-fluidity that can be pumped by a pump, and then the semi-fluid A semi-fluid soil contaminated material pumped to the excavator at the same time while excavating the soil to an arbitrary depth by the excavator with a pump by pumping the soil-like soil contaminated material through a high-pressure hose; The excavated soil is stirred and kneaded and mixed in the excavated soil to form a soil column.
[0017]
Furthermore, in the method of mixing the semi-fluid soil contamination material of the present invention into the soil, the semi-fluid soil contamination material is a fine powder, weakly alkaline or neutral dry powdery clay soil, and By kneading a predetermined amount substantially uniformly at a weight ratio of 0.5: 1: 0.5, with a mixture of heavy metal powder or a rough sand-like material such as garnet sand, and water. The mortar has a semi-fluidity that can be pumped by a pump.
[0018]
In the method of mixing the semi-fluid soil-containing material into the soil of the present invention, the semi-fluid soil-containing material is in the form of a fine powder having a particle size in the range of mesh number 150 to mesh number 350, and pH 8 to A slightly alkaline or neutral dry powdery viscous soil having a pH of 7, a mixed material composed of heavy iron powder for mixing with soil, and water in a weight ratio of 0.5: 1: 0.5, respectively. A predetermined amount is kneaded substantially uniformly and formed into a mortar shape having semi-fluidity that can be pumped by a mortar pump.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is a heavy mixture material for mixing soil consisting of heavy iron powder and other metal powders used for purposes such as soil improvement and soil neutralization, and rough sandy substances such as garnet sand with large particles. Because the specific gravity is heavy alone, or the particles are large and the weight is large, even if the air pressure or water is used as a medium to pump the mixture, the mixed material separates and settles and stays in the middle of transportation and becomes clogged. The uniform mechanical transfer by a pump or the like was impossible.
By mixing a predetermined amount of dry powdery viscous soil and water and kneading the mixture for soil mixing, the mixture is kneaded into the semi-fluided viscous soil. The viscous soil in the form of resistance acts to prevent the separation and settling of the heavy mixed material, significantly slows the settling rate of the mixed material, and maintains a state of being kneaded substantially uniformly for a considerable period of time, A mortar-like semi-fluid soil contamination material that can be pumped by a pump is formed, and the semi-fluid soil contamination material thus formed is applied to the soil for purposes such as soil improvement and soil neutralization. In this method, the soil is excavated to an arbitrary depth by the excavator while being pumped to the excavator by the pump, and at the same time, this semi-fluid soil admixture is mixed into the excavated soil.
[0020]
【Example】
Hereinafter, the present invention will be described in detail with reference to the drawings in FIGS.
The mixed material 2 for mixing soil used in the present invention is conventionally used as a soil treatment agent for soil improvement, soil neutralization or neutralization of contaminants in the industry related to soil improvement, soil neutralization and other soil treatments. It consists of iron powder and other metal powders used, and rough sands such as garnet sand.
The mixed material 2 is iron powder (specific gravity 7.8), manganese (specific gravity 7.3) or other metal powder having a relatively higher specific gravity than cement (specific gravity 2.6), or a cement powder or the like. Rough sands such as garnet sand (specific gravity 4.0) larger than clay (particle size of about 0.002 to several microns) (particle size is about 0.8 mm to 2 mm or less) Therefore, a material whose weight per particle of the mixed material 2 is larger than that of powdered clay such as cement is used.
[0021]
The dry powdery clay 3 is a natural soil of a relatively dry clayy clay having a relatively small viscosity, and its particle size is a powder of small particles of cement (less than about mesh No. 100). The particle size is in the range of about the number of meshes, and the mesh number of 200 to 300 is most preferable.
When the particle size becomes the size of mesh 150 or less, the semi-fluid soil-mixing material 1 formed into a mortar shape having semi-fluidity by kneading the mixed material 2 and water 4 kneads due to the viscosity of the viscous soil. The resistance to the settlement of the mixed material 2 is reduced, the mixed material 2 sinks in a short time, and the mortar-like semi-fluidity of the semi-fluid soil-mixed material 1 that has been bent is maintained for a long time. This causes a problem that the pump cannot be pumped by the pump.
Moreover, when the particle size becomes smaller than mesh 350, the dry powdery viscous soil 3 becomes a light dusty form of fine particles, and water 4 is added to the mixed material 2 by a mixer or the like and stirred and kneaded. Since handling such as scattering during work is inconvenient, the particle size is most preferably in the range of mesh 200 to mesh 300.
The dry powdery clay 3 is a natural soil that takes into consideration the mild safety of pH 8 or less having a light viscosity or the neutral safety of pH 7, and a large viscosity increases the alkalinity. Etc. cannot be used, and the clay is a dry powder having a relatively small powdery viscosity.
[0022]
The semi-fluid soil-mixing material 1 includes a dry powdery viscous soil 3, a heavy metal powder having a high specific gravity, or a heavy mixed material 2 made of rough sandy material such as garnet sand having a large particle, and water 4. A predetermined amount is kneaded using a mixer or the like so that these ratios are 0.5: 1: 0.5 in each weight ratio, and has a semi-fluidity that can be pumped by a pump. It is formed in a mortar shape.
[0023]
The semi-fluid soil-mixing material 1 of the present invention comprises a dry powdery clay 3, a heavy mixture 2, and water 4, each in a weight ratio of 0.5: 1: 0.5. A predetermined amount so as to be a ratio is kneaded substantially uniformly with stirring using the concrete mixer 5 shown in FIG. 1 and formed into a mortar shape having semi-fluidity that can be pumped by the mortar pump 7. is there.
In order to mix the semi-fluid soil mixed material 1 obtained in this way into the soil A to be subjected to soil treatment, the mortar pump 7 is supplied from the concrete mixer 5 to the hopper 6 and connected to the hopper 6. While being pumped to the excavation drill 10 of the excavator 8 through the high-pressure hose 9 and excavating the soil A by the rotation of the excavation drill 10, while being agitated and excavated from the tip of the excavation drill 10 into the soil A, When the excavated soil is kneaded and reaches a predetermined excavation depth, the excavation drill 10 is gradually extracted from the soil A while the excavation drill 10 is reversed, and the soil column 12 is formed in the soil A.
[0024]
In order to mix the semi-fluid soil mixed material 1 of the present invention into the soil A by the excavator 8, the semi-fluid soil mixed material 1 kneaded and formed by the concrete mixer 5 in FIG. The pump 7 is pumped to the excavation drill 10 of the excavator 8 through the high-pressure hose 9, and the excavation drill 10 is vertically arranged on the soil A as shown in FIG. The excavation instruction depth 11 to be set is set, and as shown in FIG. 3, the excavation drill 10 is gradually rotated according to the excavation instruction depth 11 set in the soil A, and at the same time, from the tip of the excavation drill 10. The semi-fluid soil-mixing material 1 is stirred while being jetted into the soil A and kneaded into the soil.
[0025]
In this case, as shown in FIG. 4, according to the kneading state of the semi-fluid soil mixed material 1 and the excavated soil, the excavation drill 10 is appropriately rotated in the forward and reverse directions to move the excavation drill 10 up and down. The drilling is performed by the drilling drill 10 until the drilling instruction depth 11 is gradually reached.
In this way, when the semi-fluid soil mixed material 1 and the excavated soil are kneaded with the excavation drill 10 to the excavation instruction depth 11 in the soil A, the excavation drill 10 of the excavator 8 as shown in FIG. As shown in FIG. 6, the semi-fluid soil mixed material 1 and the excavated soil are kneaded in the soil A to a depth reaching the excavation instruction depth 11 as shown in FIG. 6. The soil pillar body 12 is formed.
The soil column 12 obtained by kneading the semi-fluid soil mixed material 1 and the excavated soil formed in this way achieves the purpose of soil treatment by forming a necessary number according to the area of soil treatment. It is.
[0026]
In the semi-fluid soil mixing material 1 formed into a mortar shape having a semi-fluidity that can be pumped by the mortar pump 7 of the present invention used for soil treatment, in the kneaded mixture material 2 having a large weight for mixing the soil. FIG. 7 shows data obtained by measuring the settlement time using iron powder having a high specific gravity (specific gravity 7.8).
In addition, in FIG. 7 displayed as measurement data of subsidence time, as for the mixing amount of the semi-fluid soil-mixing material 1 according to the present invention with respect to 1 liter of soil, each weight ratio is 0.5: 1: 0. 1, 50 g (grams) of the dry powdery clay 3, 100 g of the mixed material 2 made of iron powder, and 50 g of water 4 are stirred using the concrete mixer 5 of FIG. However, kneaded substantially uniformly, formed into a mortar shape having a semi-fluidity capable of being pumped by the mortar pump 7, and the data obtained by measuring the settling time of the mixed material 2 made of iron powder is as shown in FIG. 7C. there were.
In addition, as a comparative example, dry powdery clay 3, mixed material 2 made of iron powder, and water 4 are mixed at a mixing ratio of 100 g of dried powdery viscous soil 3 and 100 g of mixed material 2 made of iron powder. The data representing the settlement time of water 4 as 100 g is represented as A in FIG.
Moreover, as the mixing ratio, the dry powdery clay 3 is 40 g, the mixed material 2 made of iron powder is 100 g, and the water 4 is 40 g. Compared.
In addition, the data of the measurement of the settlement time was measured by the amount of settlement deposition corresponding to the settlement time after being kneaded at each mixing ratio and left standing naturally.
[0027]
As apparent from the data shown in FIG. 7, the settling time and the settling amount of the mixed material 2 are obtained by changing the mixing ratio of the dry powdery clay 3, the mixed material 2 made of iron powder, and the water 4. As a result of measuring, after 30 minutes
When 100 g of the dry powdery clay 3 in the data A of FIG. 7, 100 g of the mixed material 2 made of iron powder and 100 g of water 4 are mixed, there is a subsidence amount of 1 cm,
When 40 g of dry powdery clay 3 in the data B of FIG. 7, 100 g of the mixed material 2 made of iron powder and 40 g of water 4 are mixed, there is a sinking accumulation amount of 0.3 cm,
When 50 g of dry powdery clay 3 in data C in FIG. 7, 100 g of mixed material 2 made of iron powder, and 50 g of water 4 were mixed, there was a subsidence accumulation amount of 0.5 cm.
[0028]
From the data of the settlement time measurement of FIG. 7, the mixed material 2 made of iron powder settles even after 30 minutes have passed after the dry powdery clay 3 and water 4 are kneaded and left to stand naturally. The mixing ratio of 50 g of dry powdery clay 3, 100 g of mixed material 2 made of iron powder, and 50 g of water 4 in the measurement data C where the deposition amount is 0.5 cm is the weight ratio. The ratio of 0.5: 1: 0.5 was most suitable in terms of the settlement time of the mixed material 2 and the mortar-shaped semi-fluidity of the semi-fluid soil-mixed material 1.
[0029]
In the case of B in the measurement data, even after 30 minutes have elapsed since the settling time of the mixed material 2, the amount of subsidence is 0.3 cm, and the amount of subsidence is the smallest. When the semi-fluid soil mixed material 1 is kneaded with the cohesive soil 3, the iron powder mixture 2 and the water 4, the mortar-like semi-fluidity is low, so clogging occurs when pumping with a mortar pump. There is a possibility that it may occur, there is a problem in terms of its fluidity, and it is not practical.
[0030]
In the case of the measurement data A, even after 30 minutes have elapsed since the settling time of the mixed material 2, it is a 1 cm settling amount, which is the largest settling amount. In this case, the dry powdery clay 3 If the mixed material 2 made of iron powder and the water 4 make the semi-fluid soil-mixed material 1, the mortar-like semi-fluidity is high, but the mixed material 2 made of iron powder sinks in the middle of conveyance. It may cause clogging, and there is a problem in terms of the settlement time, which is not practical.
[0031]
(Example 1)
The data of the Example which performed the soil treatment of the factory site of Nagano Prefecture using the semi-fluid soil mixing material of this invention were as follows.

[0032]
Based on Example 1 above, soil treatment was performed using the semi-fluid soil-mixing material of the present invention, and a part of the soil subjected to soil treatment after the lapse of 20 days from the construction of the soil treatment was collected and analyzed. It was confirmed that preferable soil treatment was completed.
Using this semi-fluid soil-mixing material of the present invention, soil treatment with a soil treatment capacity of 150 cubic meters under the conditions of Example 1 above was completed in 3 days in both preparation preparations according to the present invention. In the case of the soil treatment method, since it usually requires 10 days or more, it has the effect that the construction period of the soil treatment can be remarkably shortened. There is an effect that no facility or soil treatment space for excavating the soil once as a treatment place and transporting it to the soil treatment place, or a soil treatment machine such as a cultivator such as a tractor or a treatment place is required.
[0033]
【The invention's effect】
Since the present invention is configured as described above, it is difficult to use mechanical transfer means by conventional pumping using a pump. As a mixture for mixing soil, the specific gravity is large or the particles are large. A mortar-like semi-fluid soil that has a semi-fluidity that can be pumped by a pump by adding a predetermined amount of dry powdery clay and water and kneading it almost uniformly, even if the mixture is heavy Because it is formed into a mixed material, powder or particles with heavy specific gravity is large, and the mixed material with a large weight is substantially evenly distributed by mechanical transfer means that pumps it using a pump without separating and sinking during conveyance. There is an effect that it is possible to provide a semi-fluid soil mixed material that is directly mixed into the soil.
[0034]
The semi-fluid soil-mixed material of the present invention can be used as a mixed material to the soil, such as iron powder with heavy specific gravity as a mixed material, and is formed into a mortar shape having semi-fluidity that can be pumped by a pump Therefore, in the purification treatment of the contaminated soil, there is an effect that it can be mixed directly into an arbitrary depth in the contaminated soil.
[0035]
Since the semi-fluid soil mixed material of the present invention is formed into a mortar shape having semi-fluidity that can be pumped by a pump, excavation and purification treatment is possible up to an arbitrary treatment depth according to the depth of soil treatment. It has the effect of becoming.
[0036]
When using the method of mixing the semi-fluid soil contamination material of the present invention into the soil, there is no need for conventional enclosure work such as sheet pile accompanying the excavation and transportation of contaminated soil or mountain retaining work, even in a narrow contaminated soil space Soil treatment is easily possible, the soil treatment construction period is significantly shortened, the soil treatment construction is easy, the cost is greatly reduced compared to the conventional method, the material used for soil treatment is also inexpensive, and There is an effect that its acquisition is relatively easy.
[0037]
When using the method of mixing the semi-fluid soil mixing material of the present invention into the soil, the excavating machine, the mixer, the concrete pump, and other mechanical devices are directly excavated into the soil to be treated. It is small and can use these mechanical devices that are generally used in the industry without requiring special machinery. Moreover, the soil to be treated in the conventional method is dug up once and transferred to the soil treatment device. However, since it is mixed directly into the soil, the spring water treatment associated with the construction work that has been required in the past is completely unnecessary, and there is an excellent effect that almost no disposal of the remaining soil is required.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an apparatus for forming a semi-fluid soil mixing material of the present invention and a mixing method using an excavator used for mixing into the soil.
FIG. 2 is a perspective view of a main part in which a semi-fluid soil mixed material is mixed into the soil by an excavation drill.
FIG. 3 is a perspective view of a main part showing a state in which a semi-fluid soil mixed material is mixed into soil with a drilling drill.
FIG. 4 is a perspective view of a main part showing a state in which a semi-fluid soil mixed material is mixed into soil with a drilling drill.
FIG. 5 is a perspective view of an essential part showing a state in which a semi-fluid soil mixed material is mixed into soil with an excavation drill and the excavation drill is extracted.
FIG. 6 is a cross-sectional view of a main part showing a soil pillar provided in soil by mixing a semi-fluid soil-containing material into the soil.
FIG. 7 is a graph showing data comparing the settlement time of the mixed material in the semi-fluid soil mixed material of the present invention with the settlement time when the mixing ratio is changed.
[Explanation of symbols]
1 Semi-fluid soil mixed material
2 Mixed materials
3 Dry powdery clay
4 Water
5 Concrete mixer
6 Hopper
7 Mortar pump
8 Excavator
9 High pressure hose
10 Drilling drill
11 Drilling instruction depth
12 clay pillars
A soil

Claims (8)

A semi-mixed mixture of a predetermined amount of dry powdery clay, soil-mixing material, and water is uniformly mixed and formed into a semi-fluid mortar that can be pumped by a pump. Fluid soil mixed material. Weakly alkaline or neutral dry powdery viscous soil, a mixed material for soil mixing, and water are kneaded in a uniform amount at a weight ratio of 0.5: 1: 0.5, respectively, with a pump. A semi-fluid soil-mixing material, which is formed into a mortar shape having semi-fluidity capable of being pumped. A fine powdery weak alkaline or neutral dry powdery viscous soil, a mixed material consisting of a heavy metal powder for mixing with soil or a rough sandy material such as garnet sand, and water, each having a weight ratio of 0.5: A semi-fluid soil-mixing material characterized in that a predetermined amount is kneaded substantially uniformly at a ratio of 1: 0.5 and formed into a mortar shape having semi-fluidity that can be pumped by a pump. A fine powdery weakly alkaline or neutral dry powdery viscous soil, a heavy iron powder mixture for soil mixing, and water in a weight ratio of 0.5: 1: 0.5, respectively. A semi-fluid soil-mixing material characterized in that a predetermined amount is kneaded substantially uniformly and formed into a mortar shape having semi-fluidity that can be pumped by a pump. A predetermined amount of dry powdery cohesive soil, a mixed material for soil mixing, and water are kneaded substantially uniformly to form a mortar-like semi-fluid soil mixed material having semi-fluidity that can be pumped by a pump, Next, while pumping the semi-fluid soil mixed material to an excavator by a pump, the semi-fluid soil mixed material is mixed into the soil simultaneously with excavating the soil to an arbitrary depth by the excavator. A method of mixing semi-fluid soil mixed material into soil. Weakly alkaline or neutral dry powdery clay soil, mixed material for soil mixing, and water are kneaded substantially uniformly with a mixer in a predetermined ratio of 0.5: 1: 0.5 by weight ratio. , Forming a mortar-like semi-fluid soil mixed material having semi-fluidity that can be pumped by a pump, and then pumping the semi-fluid soil mixed material to an excavator by a pump, and arbitrarily selecting the soil by the excavator It is characterized by mixing the semi-fluid soil mixed material pumped to the excavator and excavating soil at the same time while excavating to the depth of kneading and kneading, then mixing in the excavated soil to form a soil column To mix semi-fluid soil-containing material into soil. A semi-fluid soil-contaminated material is a fine powdery weakly alkaline or neutral dry powdery viscous soil, a mixed material consisting of a heavy metal powder or garnet sand or other rough sandy material, and water. A predetermined amount is kneaded substantially uniformly at a weight ratio of 0.5: 1: 0.5, respectively, and formed into a mortar shape having a semi-fluidity capable of being pumped by a pump. 6. Mixing method of 6 semi-fluid soil mixed material into soil. Semi-fluid soil-mixing material is in the form of fine powder having a particle size in the range of mesh No. 150 to No. 350, weakly alkaline or neutral dry powdery clay of pH 8 to pH 7, and heavy iron for soil mixing A predetermined amount of powder mixture and water are kneaded substantially uniformly in a weight ratio of 0.5: 1: 0.5, respectively, and formed into a mortar shape having semi-fluidity that can be pumped by a mortar pump. A method for mixing the semi-fluid soil-mixing material of claim 5 or 6 into soil.

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