KR102306793B1 - Method of solidifying surface of soft ground with preventing particle of solidifying agent from flying and being scattered - Google Patents

Abstract

The present invention relates to a method for solidifying the surface layer of the soft ground. The method comprises: a solidifying agent storage step of storing a powder type solidifying agent in a silo; a solidifying agent loading step of loading the solidifying agent, stored in the silo, into a closed solidifying agent chamber provided in a solidifying agent carrier, through a transfer pipe; a solidifying agent transport step of moving the solidifying agent carrier to a position capable of supplying the solidifying material to a first mixing position where modified soil is to be produced, on the soft ground; a solidifying agent supply step of supplying the solidifying agent from the solidifying agent carrier to the first mixing position; a raw soil improvement step of mixing the solidifying agent and raw soil at the first mixing position on the soft ground by a mixing device to produce modified soil; and a modified soil solidifying step of compacting the modified soil with a compaction roller and curing the same. Therefore, the method can prevent air pollution as a power type solidifying agent is not released into the atmosphere during a surface layer solidification process on the soft ground, and can lower the cost of improvement work and increase working speed, thereby reducing the time and cost of improvement work on the soft ground.

Description

A method of solidifying the surface layer of soft ground to prevent scattering of solidified materials in powder state

The present invention relates to a method for solidifying the surface layer of a soft ground, and more specifically, preventing air pollution caused by the scattering of micro-particles of the solidifying material into the air in the process of solidifying the soft ground using a solidifying material and at the same time providing a defined area It relates to a method for solidifying the surface of a soft ground and an apparatus used therefor, which improves work efficiency and cost by shortening the time of the solidification process of the surface of the soft ground.

In general, soft ground refers to a ground that does not have sufficient bearing capacity to become the foundation ground of a building.

In general, soft ground consists of soft and highly compressible clay, silt, pit, etc. with an N value of 0 to 4 in the standard penetration test, and can be easily found in alluvial land such as deltas and drowned valleys. On the other hand, the ground containing water in the sand layer with an N value less than 10 also belongs to the soft ground.

The surface layer solidification method of soft ground analyzes the soil quality of the soft ground distributed at the construction site, conducts structural review and mix design to produce improved soil by stirring the raw ground soil with the solidifying material at a predetermined ratio, then compaction and curing It refers to a construction method that secures the bearing capacity required for the ground through a process.

To this end, the raw soil within 5m of the lower part of the surface of the earth is mined with an excavator, put into a mixing device, mixed with a powder solidifying material at a predetermined ratio in a separate stirring device to produce improved soil, and using a dozer and roller It goes through a compaction and curing process. Here, the modified soil dispersed in the soft ground is hardened and solidified through chemical actions such as etringite reaction, hydration reaction, pozzolan reaction, and ion exchange of the solidifying material to obtain bearing power.

Here, the raw material of the powder solidifying material has a component ratio as shown in Table 1 below.

CaO SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ MgO SO ₃ K ₂ O Na ₂ O Cl Ig portland cement 62.0% 21.0% 5.0% 3.0% 2.0% 1.2% 1.0% 4.8% blast furnace slag 37.2% 34.0% 15.0% 0.5% 6.3% 0.5% 6.6% fly ash 0.7% 52.6% 33.8% 4.6% 0.7% 0.3% 4.5% 0.3% 2.5% Paper Ash 52.0% 14.0% 9.3% 2.0% 3.0% 1.0% 0.3% 0.8% 15.0% 2.6% Desulfurization Dust 0.1% 0.1% 0.1% 40.5% 0.0% 47.5% 3.5% 8.2% Desulfurized gypsum 63.0% 2.9% 0.8% 0.7% 0.6% 23.7% 0.2% 0.0% 8.1% CKD 32.2% 4.2% 1.7% 1.4% 1.0% 1.5% 26.2% 1.2% 16.9% 13.7% anhydrite 40.0% 1.0% 1.0% 0.1% 50.0% 7.9% ferronickel 0.7% 53.5% 1.5% 4.5% 35.5% 4.5% metakaolin 49.1% 43.2% 1.3% 0.2% 0.3% 5.9% bentonite 2.0% 65.0% 17.0% 3.0% 4.0% 0.5% 3.0% 5.5% Silica fume 90.0% 0.6% 0.6% 8.8%

The powder solidified material prepared by the appropriate mixing of the above raw materials is subjected to a pozzolan reaction under moisture. Pozzolan is a fine powder with amorphous silica with high activity. It has no hydraulic properties by itself, but in the presence of moisture, it reacts with calcium hydroxide to form calcium silicate hydrate crystals, and the following reactions occur.

CaO + SiO ₂ + H ₂ O → CSH (calcium silicate hydrate crystal)

When pozzolan is combined with portlant cement, it reacts with calcium hydroxide generated during the hydration reaction to consume calcium hydroxide and increase the ratio of C-S-H. At this time, calcium oxide is important, and the mixing ratio is designed in consideration of the ratio of activated calcium oxide among the main material components in the table above.

On the other hand, the expanding material having the function of inducing the expansion of the modified soil by having the property of expanding during the hydration reaction process is called etringite, and the reaction according to the following chemical formula occurs.

3CaO·Al ₂ O ₃ + 3CaSO ₄ + 26 H ₂ O → 3CaO·Al ₂ O ₃ ·3CaSO ₄ ·32H ₂ O

By pushing and expanding between hardened particles or between hydrates by the generation pressure accompanying the growth of ettringite crystals in the hardened body of the solidified modified soil, the contractility of the hardened ground after curing is completed and the effect of introducing chemical prestress can be obtained. And it is possible to obtain the effect of improving the strength according to the watertightening. Etringite reacts with 3CaO·Al ₂ O ₃ again to form monosulfate and calcium aluminate hydrate.

In addition, the solidifying material is combined with clay or sandy soil to form a network of aggregates, loses fluidity by confinement of moisture in the soil and solidifies, and is hardened by the hydration reaction of the powdered solidifying material.

In addition, the powder solidification material dissolves Si and Al from the solid aluminum silicate material with an alkali activator to form an oligomer composed of Si-O-Si and Si-O-Al type polymer bonds, and polycondensation of the three-dimensional oligomer cured to a final solid polymer structure by

The surface layer solidification process of the soft ground is performed using the powder solidification material by the reaction as described above.

To this end, in the prior art, 1 ton at a high fire production plant was individually packaged in large sacks and transported to the site by a transport truck, and then equipment capable of entering the soft ground was mobilized and the mixing device was placed in several locations as much as the amount to be used at one place. Place a tonma bag or tonbag containing solidified materials. Then, while inserting the sack as it is in the high fire hopper on the upper part of the mixing device with a lifting device such as a separate crane, the lower end of the sack was torn and supplied. Usually 5-6 sacks are used per hour.

However, in the process of tearing and opening the lower end of the tonnage and putting the solidified material in powder form into the mixing device, the minute the tornado is torn, the fine powder of the solidified material in the nanometer unit is spread into the atmosphere, and the solidified material is exposed to the atmosphere. It was also blown by the wind, causing a serious problem of polluting the surrounding air. Moreover, as the awareness of fine dust increases in recent years, there is an urgent need to prevent the solidified powder from flowing into the atmosphere.

In addition, not only is the process of locating the tonma poles in various places on the soft ground inconvenient, but also the tonma poles are packed daily, the seals are manually released at the site, and a lifting device is used 5 to 6 times per hour. Therefore, the process of repeatedly inputting into the mixing device takes a long time, delaying the work time, and there was a problem in that the surface solidification process had to be stopped frequently in the process of inputting the solidification material of tonma.

In addition, the cost of sackcloth reaches about 15% compared to relatively cheap solidified materials, and as the lower end of the sack is torn and put in, it is difficult to reuse, which increases the cost and causes environmental pollution due to sack waste. became

In order to solve the above-mentioned problems, the present invention provides a method for solidifying the surface of the soft ground that fundamentally prevents air pollution by preventing the solidification material in powder form from leaking into the atmosphere during the surface solidification process of the soft ground. The purpose.

In addition, an object of the present invention is to reduce the time and cost of improving the soft ground by lowering the cost and increasing the working speed.

To this end, the present invention aims to simplify the construction process and increase the working speed by directly mixing the solidified material and the raw soil sand on the soft ground.

Above all, it is an object of the present invention to accurately supply the solidified material in powder state to the mixing device without leakage even if the position of the mixing device for mixing the solidified material and raw soil is changed.

An object of the present invention is to prevent subsidence of the original ground by a solidified material carrier and secure the safety of movement while reciprocating the solidified material from the silo to the improvement site.

And, an object of the present invention is to prevent the surface layer solidification process of the soft ground from being interrupted during the process of supplying the solidifying material, so that the surface layer solidification process of the soft ground is continuously continued to increase process efficiency.

And, an object of the present invention is to shorten the process time while increasing the bearing capacity of the improved ground even for a soft ground with little moisture such as sandy soil.

In order to achieve the above object, the present invention provides a method for solidifying a surface layer of a soft ground, comprising: a solidifying material storage step of storing a powdery solidified material in a silo; a solidified material loading step of loading the solidified material stored in the silo into a closed solidified fire chamber provided in a solidified material transporter through a transfer pipe; a solidifying material transport step of moving the solidifying material transporter to a position capable of supplying the solidified material to a first mixed position where the modified soil is to be produced on the soft ground; a solidification material supply step of supplying the solidification material from the solidification material carrier to the first mixing position; a raw soil improvement step of mixing the solidified material and the raw soil of the first mixing position on a soft ground by a mixing device to produce improved soil; The modified soil solidification step of curing the modified soil after compacting it with a compaction roller; It provides a surface layer solidification method of the soft ground, characterized in that it comprises.

In addition, according to another field of the invention, the present invention is an apparatus used for a surface solidification method of a soft ground, and a silo for accommodating a solidifying material in powder form; A solidification chamber in a closed state that is filled by receiving the solidification material from the silo is provided, and the solidification material can be supplied to the first mixing position where the modified soil is to be produced on the soft ground by moving to the caterpillar wheel. a solid fire carrier moving to the location; a supply pipe connected to the solidification chamber and supplying the solidification material filled in the solidification chamber to the first mixing position so as not to leak to the outside air; a mixing device for mixing the solidified material and raw soil supplied to the first mixing position on the soft ground to produce improved soil; a compaction roller for compacting the improved soil generated by the mixing device; It provides a surface layer solidification device of the soft ground, characterized in that it comprises.

The 'closed state' and similar terms described in the present specification and claims are defined to refer to a state in which the solidified material in powder form does not leak to the outside air enough to pollute the atmosphere, and a very small amount of powder is It is not meant to refer to a sealed state to the extent of being discharged.

The 'first mixing location' and similar terms described in this specification and claims are defined to refer to any location where raw soil sand and solidified material are mixed by a mixing device on a soft ground, and a specific location of the soft ground it doesn't mean Here, the 'first mixing position' may be a position for mixing in advance, and includes all arbitrary positions that are improvised during work in the field.

As described above, the present invention can obtain an advantageous effect of fundamentally preventing air pollution by preventing the solidification material in powder form from flowing into the atmosphere during the surface layer solidification process of the soft ground.

That is, the present invention completely eliminates the conventional problem of inevitably flowing out into the air in the process of opening and putting the tonnage bag by excluding the use of the tonnage bag during the surface layer solidification process of the soft ground. A beneficial effect of solving the problem can be obtained.

At the same time, the present invention eliminates the use of tonnage belts, which have a high cost ratio compared to solid materials, thereby lowering the cost of the improvement work and increasing the work speed, thereby obtaining the advantageous effect of reducing the time and cost of the improvement work of the soft ground. can

Above all, the present invention supplies the solidified material in the powder state input to the improvement work of the soft ground to the closed chamber using the transport pipe and the supply pipe sealed with the outside air, and from it, by supplying it to the improvement site, An advantageous effect of preventing the fire from leaking out can be obtained.

Furthermore, in the present invention, the modified soil is not produced in a separate device by rotating the mixing member of the mixing device immediately at the position where the improvement work of the soft ground is being performed and mixing the solidified material and the raw soil sand to produce the improved soil, It is possible to obtain the effect of excluding the possibility of air pollution that may occur in the process of supplying to the soft ground in the state in which the improved soil is produced.

And, according to the present invention, as the mixing operation is performed while supplying the liquid by connecting the liquid supply unit to the mixing unit of the mixing apparatus, the effect of reliably preventing dust that may be generated in the mixing process from spreading to the atmosphere can be obtained. .

On the other hand, the present invention is configured so that the solid fire chamber of the solidified material transporter can be filled with minimal empty space while reducing the chamber's own weight by lowering the height of the solidified fire chamber. By minimizing the weight of the solid fire carrier, it is possible to prevent subsidence of the soft ground during movement, and at the same time, by lowering the height of the solid fire chamber, the center of gravity is lowered to ensure stable movement.

And, the present invention supplies the solidified material in powder form from the solidified material carrier to the mixing device through a flexible supply pipe, so that the solidified material can be supplied from the solidified material carrier without leakage even during the process of continuing the operation while the mixing device moves. Thus, it is possible to obtain the advantageous effect of increasing the process efficiency by continuously continuing the surface layer solidification process of soft ground, while certainly reducing the possibility of air pollution.

In addition, in the process of improving soft soil with low moisture, such as sandy soil, the present invention increases the moisture content by containing moisture that enhances the solidification effect, thereby securing greater bearing capacity of the improved soil and increasing the compaction rate of the improved soil. advantageous effect can be obtained.

1 is a flowchart sequentially showing a surface layer solidification method of a soft ground according to an embodiment of the present invention;
Figure 2 is a view for explaining the principle of the surface layer solidification method of Figure 1;
Figure 3 is a view showing the configuration of the surface layer solidification device of the soft ground according to an embodiment of the present invention;
4 is a view showing the configuration of transferring the solidified material in the powder state from the silo to the solidified material transporter;
5 is a cross-sectional view showing the configuration of the solidification chamber along the cutting line VV of FIG. 4;
Figure 6a is a view showing the configuration of supplying the solidification material in the powder state to the first mixing position of the soft ground in the solidification material transporter;
Figure 6b is a view showing the configuration of mixing the solidified material supplied to the first mixing position with the raw soil sand of the soft ground with a mixing device;
7 is a view showing the configuration of a mixing member for performing a mixing operation while a supply pipe and a liquid supply part are connected to the mixing unit of the mixing apparatus as another embodiment of the present invention, and the solidification material and the liquid are supplied;
8 is a front view showing a mixing member applicable to a mixing apparatus as another embodiment of the present invention;
Fig. 9 is a perspective view showing a configuration in which a flexible supply pipe is connected to the solidification chamber of Fig. 6A;
Fig. 10 is a perspective view showing the configuration through the solidification chamber and the supply pipe of Fig. 9;
11 is a view for explaining the configuration of an opening/closing cover of the outlet of the solidified fire chamber of FIG. 10;
12 is a view showing the configuration of dispersing the modified soil in which the solidification material and the raw soil sand are mixed with the dozer.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, detailed descriptions of well-known functions or configurations will be omitted in order to clarify the gist of the present invention.

As shown in Figure 1, the surface layer solidification method (S100) of the soft ground according to an embodiment of the present invention, the solidification material storage step (S110) of storing the solidification material in powder form in a silo (silo, 100) and , a solidified material loading step (S120) of mounting the solidified material 97 stored in the silo 100 on the solidified material transporter 200, and the solidified material transporter 200 is placed on the soft ground 60 at a mixing position (P1, P2, P3, . An improvement in which the solidified material supply step (S140) of supplying (97) is mixed with the raw soil sand 98 and the solidified material 97 on the soft ground 60 with the mixing device 300 to produce the modified soil 99 The soil generation step (S150), the modified soil dispersion step (S160) of widely dispersing the modified soil 99 remaining in the soft ground 60, and the modified soil solidification step of compacting and curing the dispersed modified soil to solidify it ( S170) is included.

This is, as shown in FIG. 2, when raw soil 98 with low adhesion and low bearing power is mixed with solidification material 97 in powder form in a predetermined ratio, the solidification material 97 is mixed with raw soil sand ( 98) becomes the modified soil 99 to which the particles are attached, and in a state in which the modified soil 99 is evenly dispersed in the soft ground 60, pressure is applied with the compaction roller 600 to cure and solidify, The principle of increasing support is used.

Here, the solidifying material 97 contains fine powder in a micro unit, and when it is put into a mixing device as a conventional tonma, the fine particles of the solidifying material instantly spread into the atmosphere and pollute the air in the surrounding area. A problem arose. The present invention prevents air pollution caused by the outflow of solidifying material particles into the atmosphere, thereby enabling an environmentally friendly improvement process of solidifying the surface layer of the soft ground, and at the same time improving the soft ground within a short time using inexpensive equipment that allowed the process to be carried out.

On the other hand, the mixing positions (P1, P2, P3) of the soft ground 60 refer to a location or area where the modified soil 99 is to be generated on the soft ground, and the mixing positions P1, P2, P3 of each It is determined in order to produce the improved soil 99 of the amount necessary to improve the surroundings. Accordingly, as shown in FIG. 3 , the first mixing location P1 , the second mixing location P2 , and the third mixing location P3 may be disposed adjacent to each other, and spaced apart from each other although not shown in the drawing It can also be arranged. In addition, the mixing position is not limited to one point, and may refer to an area sufficient to mix the solidification material 97 and the raw soil 98 , and as the mixing device 300 moves, the solidification material 97 and the circle As the soil 98 is mixed, it may refer to a larger area.

To this end, the apparatus 1 according to an embodiment of the present invention used to perform the surface layer solidification method (S100) of the soft ground 60 configured as described above, as shown in FIG. 3 , the solidification material 97 ) receiving the silo (Silo, 100), and the solidification material 97 is supplied from the silo 100 to the mixing position (P1, P2, P3, ...) on the soft ground 60. When it is necessary to excavate in advance the solidified material carrier 200 that supplies At the mixing position where the excavator 400 and the solidification material 97 are supplied by the excavator 400, and a dozer 500 for dispersing the modified soil 99 supplied to the soft ground 60 from the mixing device 300 to be widely spread around the mixing device 300 , and a thickness predetermined by the dozer 500 . Mixing positions (P1, P2, P3,..) of the compaction roller 600 compacting the improved soil 99 dispersed in the Including a liquid supply unit 700 for supplying a liquid 88 while supplying to and while mixing the solidified material 97 and the raw soil 98 by the mixing device 300 to produce the modified soil 99 is composed

On the other hand, in another embodiment of the present invention, when the raw soil 98 is naturally excavated by the mixing member 332 of the mixing device 300 , the excavator 400 may not be included, and the mixing device 300 . The dozer 500 may not be included in the case where the modified soil is uniformly generated over the entire area of the soft ground while moving on the soft ground.

The silo 100 is disposed at a position around the soft ground 60 where the surface layer solidification process is performed or a position where the improvement process is already completed, and accommodates the solidifying material 97 in powder form.

Here, the solidifying material is in the form of a fine powder, and includes micro-powder, cement and blast furnace slag, fly ash, desulfurized gypsum, paper ash, incinerated ash, slaked lime, anhydrite, portland cement, lime, alkali activator, It refers to a mixture of various powder materials such as bentonite for use. The powder solidifying material is advantageous in terms of being able to easily control the water content of the soil.

At this time, when the silo 100 is formed to be long in the gravitational direction, the applied load per unit area may increase to cause subsidence of the ground, so as shown in FIG. 4 , the length L in the horizontal direction is It is preferable to be formed longer than H) to prevent subsidence of the ground.

On the upper side of the silo 100, the inlet 110 is formed in a closed structure that is covered by the cover 110a, and while accommodating the solidified material 97 in powder form, the solidified material particles spread to the atmosphere by wind, etc. prevent At the same time, at the lower side of the silo 100 , an outlet 130 is formed and a conveying pipe 190 for transferring the solidified material to the solidified material chamber 210 of the solidified material transporter 200 is mounted.

Here, the silo 100 is formed to have a funnel-shaped inclined region 120x that gradually decreases in cross section toward the bottom, and is provided with a support 120 for supporting the silo overturning, and through the outlet 130 . In the process of discharging the solidification material 97 , the solidification material 97 in powder form does not remain in the inner corner of the silo 100 as much as the angle of repose, and is configured to be completely discharged through the outlet 130 .

In this case, the configuration of the opening/closing covers 217 and 218 installed in the solidification chamber 210 to be described later may be provided at the outlet 130 of the silo 100 .

The solidified material transporter 200 is a closed solidification chamber 210 filled by receiving the solidification material 97 from the silo 100, and a caterpillar type that allows it to move by itself while distributing the load applied to the ground. A wheel 220 is provided.

Since the solidified material transporter 200 moves on the soft ground 60 where the surface solidification process is not performed, it is necessary to lower the center of gravity as low as possible and transport as much solidified material as possible, without leaving the conveyed solidification material. It is very important that the soft ground 60 is supplied to the mixing positions P1, P2, P3, ... and used to produce improved soil by the mixing device 300 .

This can increase the capacity of the solidified material to be transported by forming the long length of the solidified material carrier 200, but raising the standard of the solidified material carrier 200 by one step greatly increases the cost required for the improvement process of the soft ground. causes Therefore, there is a need for a method of using the solid fire carrier 200 of a predetermined standard, for example, a standard of 5 tons or less.

With respect to the solidified material transporter 200 of a predetermined standard, the weight enough to safely move without subsidence in the soft ground, as much as possible of the solidified material 97 is loaded at once, and moved to the mixing device 300 (71). ), returning to the silo 100 again 72, and supplying all the solidified material transported to the mixing device 300 without any residue is very important in improving process efficiency and lowering the cost of equipment. At the same time, it is necessary to form an outlet 210b at the lower end of the solidified material carrier 200 so that the supply pipe 290, which is a flexible screw conveyor, can be detached.

In this aspect, as shown in FIG. 5 , the solidification chamber 210 mounted on the solidification carrier 200 receives the solidification material 97 from the silo 100 through the transfer pipe 190 . The inlet 210a is formed on the upper side, and the solidifying material 97 is supplied to the mixing positions (P1, P2, P3, ...) of the soft ground 60 through the supply pipe 290 or the mixing device 300. An outlet (210b) for directly supplying the solidification material (97) to the mixing member of the lower side is formed.

And, similar to the silo 100, the solidification chamber 210 is formed to have a funnel-shaped inclined region 210x whose cross section is gradually smaller toward the bottom, similar to the silo 100, and a support 212 for supporting it is provided. do. Through this, the solidification material 97 accommodated in the solidification chamber 210 and transported to the solidification carrier 200 is supplied (Fig. 6a) or transfer to the mixing unit 330 of the mixing apparatus 300 and supply (FIG. 7) becomes possible.

For example, the solidification chamber 210 may be formed of 3m * 1.8m * 1.5m in order to provide a loading space of 4 tons to 5 tons.

On the other hand, since it is necessary to minimize the weight of the casing 211 forming the internal space of the solidification chamber 210 , it is very important to fill the solidification material 97 with respect to a predetermined height of the casing 211 . This is because, if the solidification material 97 is not fully filled with respect to the height of the casing 211 , the transport amount of the transportable solidification material 97 is reduced due to the unnecessary weight of the casing, thereby reducing the supply amount at one time.

5, when the solidification material 97 is introduced 51 through the transfer pipe 190 connected to the inlet 210a of the solidification material chamber 210, the solidification material 97 in a powder state is approximately It forms an angle of repose (ang) of 40 degrees and fills the internal space of the solidification chamber 210 . For this reason, the solidification material 97 is piled high at the lower side of the inlet 210a, but is piled low around the inlet port 210a, thereby leaving an empty space 210v not filled with the solidification material 97. That is, the effective loading space may be reduced to about 1/2 of the total loading space. Accordingly, in order to fill the empty space 210v of the solidification chamber 210 with the solidification material 97 , a dispersing unit for dispersing the solidification material in the horizontal direction is provided inside the solidification material chamber 210 .

That is, as shown in FIGS. 5 and 10 , the dispersion unit has a rotation shaft ( 214s, 215s) and the first transfer blades (214x, 215x) coupled in the first spiral direction in the first area to one end based on the center of each of the rotation shafts 214s, 215s, and each rotation shaft 214s, 215s) is provided with second transfer blades 214y and 215y coupled in a second helical direction opposite to the first helical direction in the second region from the center to the other end.

In the embodiment illustrated in the drawings, the configuration in which the rotation shafts 214s and 215s of the dispersion unit are arranged in two rows at right angles to each other is shown, but according to another embodiment according to the present invention, the dispersion unit is formed with one rotation shaft. Alternatively, two or more rows may be arranged at an angle other than a right angle.

5, when the solidification material 97 is filled in the solidification chamber 210 and the height of the solidification material accumulated at the lower side of the inlet 210a reaches the rotation shafts 214s and 215s or covers the center of the rotation shaft, the driving unit ( The rotation shafts 214s and 215s are rotated 214r and 215r by M). At this time, as the first transfer blades 214x and 215x and the second transfer blades 214y and 215y are formed in opposite directions to each other, the first transfer blades 214x and 215x and the second transfer blades 214y and 215y are formed. Thus, the solidified material in the center of the chamber is moved 52 in a direction to be dispersed to both sides.

In this way, in a state in which the dispersion unit is operating, the solidification material 97 introduced from the silo 100 is dispersed in the horizontal direction in the internal space of the solidification material chamber 210 to fill the solidification material chamber 210 as much as possible. There is an effect that it is possible to lower the center of gravity by horizontal dispersion, and to make the weight of the casing 211 of the solidification chamber 210 filling the predetermined amount of the solidification material 97 smaller.

An outlet 210b as a coupling portion to which the supply pipe 290 is detachably coupled is formed below the inclined region 210x of the solidification chamber 210 . The outlet 210b is operated in an open state and a closed state by the opening/closing cover.

To this end, as shown in FIGS. 5 and 11 , a fixing plate 217 having an exposed hole 217a is fixed to the lower side of the inclined region 210x of the solidification chamber 210 , and the fixing plate 217 is fixed. An opening/closing device in which a moving plate 218 having a through-hole 218a formed therein is installed so as to be reciprocally slidably moved 218d is provided on a lower side of the . Here, the guide part 218x for guiding the movement of the moving plate 218 is provided on the inner wall of the casing 211 of the solidifying fire chamber 210 , thereby ensuring smooth movement of the moving plate 218 . The movement of the moving plate 218 may be performed manually by an operator or electrically by a separate actuator (not shown). Although the drawing illustrates a configuration in which a plurality of exposed holes 217a and through holes 218a are provided, the present invention is not limited thereto, and according to another embodiment of the present invention, the exposed holes 217a and the through holes 218a are provided. Any one or more of them may be formed as only one.

Accordingly, before the supply pipe 290 is mounted to the outlet 210b, the blocked cover surface 218b of the moving plate 218 blocks all the exposed holes 217a of the fixed plate 217, and the solid fire chamber ( The solidifying material 97 in the powder state accommodated in the interior of the 210 is prevented from leaking to the outside. Then, after the supply pipe 290 is mounted to the outlet 210b, the moving plate 218 slides so that the through hole 218a becomes an open position in which the through hole 218a is aligned with the exposed hole 217a of the fixed plate 217. do.

Then, by operating the driving motor 299 for driving the supply pipe 290, the conveying screw 295 having only a blade formed in a spindleless shape of the supply pipe 290 rotates 295r, as shown in FIG. 6A As shown, the solidified material 97 in the powder state passes 53 through the open/close cover in the open state, and the first mixing position P1 of the soft ground 60 from the solidified material chamber 210 through the supply pipe 290 (P1). ), it is possible to transfer the solidified material in the powder state without leaking to the atmosphere (54).

Although not shown in the drawing, the opening and closing devices 217 and 218 shown in FIGS. 5 and 10 are also provided at the outlet 130 of the silo 100, and a transfer pipe 190 to the outlet 130 of the silo 100. It is possible to prevent air leakage of solid fires in the process of connecting them.

Meanwhile, as shown in FIG. 4 , a transfer pipe 190 is used in the process of transferring the solidified material 97 in powder state from the silo 100 to the solidification chamber 210 , and from the solidification chamber 210 . A supply pipe 290 is used in the process of transporting to the mixing unit 330 .

4, the transfer pipe 190 has one end 191 coupled to the outlet 130 of the silo 100, and the other end 192 at the inlet 210a of the solidification chamber 210. It is combined to transport the solidifying material 97 in a powder state.

Here, the conveying pipe 190 may be formed of a material such as metal, but according to a preferred embodiment of the present invention, the conveying pipe 190 is formed in a shape that can be bent or deformed or the conveying tube 194 made of a flexible material. is formed, and the inside of the conveying tube 194 is formed in the form of a spiral blade without a main shaft, and the solidified material 97 is conveyed from one end 191 to the other end 192 while rotating (195r) by the conveying motor 199. A transfer screw 195 is disposed.

Accordingly, in a state in which both ends 191 and 192 of the transfer pipe 190 are connected to the outlet 130 of the silo 100 and the solidification chamber 210, respectively, by the rotation of the transfer motor 199, the transfer screw ( 195) rotates, the solidified material inside the silo 100 does not leak to the outside air, and the solidified material is continuously transferred as powder, transferred to the solidified material chamber 210, and mounted on the solidified material carrier 200. . Furthermore, as the conveying tube 194 is formed of a material that can be bent and deformed, even if the solidified material carrier 200 is located at an arbitrary position around the silo 100, it connects the conveying pipe 190 to remove the solidified material in the powder state. It is possible to obtain the advantage that it becomes possible to transfer 51 into the interior of the solidification chamber 210 .

The transfer pipe 190 is separated independently, and if necessary, one end 191 and the other end 192 are connected to the outlet 130 of the silo 100 and the inlet 210a of the solidification chamber 210 respectively. It can be used to transport 51 fire 97. According to another embodiment of the present invention, any one of both ends of the transfer pipe 190 is installed in a fixed state to any one of the outlet 130 of the silo 100 and the inlet 210a of the solidification chamber 210 Thus, it may be configured to couple the unfixed end to the other of the outlet 130 of the silo 100 and the inlet 210a of the solidification chamber 210 only when the transfer of the solidification material 97 is required.

Similarly, as shown in FIGS. 6A to 10 , the supply pipe 290 has one end 291 coupled to the outlet 210b of the solidification chamber 210, and the other end 292 having a solidification material ( 97) is placed in the mixing positions (P1, P2, P3, ..) such as the first mixing position (P1) of the soft ground 60 to be supplied, and the solidified material 97 in the powder state is transferred to the solidification carrier ( 200) to the mixing positions (P1, P2, P3, ...) on the soft ground (60). According to another embodiment of the present invention shown in FIG. 7 , one end 291 of the supply pipe 290 is coupled to the outlet 210b of the solidification chamber 210 , and the other end 292 of the supply pipe 290 is ) may be connected to the connector 330c of the mixing unit 330 of the mixing apparatus 300 .

Here, the supply pipe 290 may be formed of a material such as metal, but according to a preferred embodiment of the present invention, the supply pipe 290 is formed of a material capable of bending deformation or the supply tube 294 of a flexible material. A conveying screw 295 that is formed in the form of a blade without a main shaft and continuously conveys the solidified material 97 as a powder while rotating (295r) by the conveying motor 299 is disposed inside the supply tube 294 do.

Accordingly, one end 291 of the supply pipe 290 is connected to the outlet 210b of the solidification chamber 210, respectively, and the other end 292 of the supply pipe 290 is a mixed position to improve the soft ground 60 (P1, P2, P3, ...), when the conveying screw 295 rotates (295r) by the rotation of the supply motor 299, the solidification material inside the solidification chamber 210 is moved to the other end ( 292), so that the solidified material is supplied from the supply pipe 290 without leaking to the outside air.

Meanwhile, according to another embodiment of the present invention shown in FIG. 7 , the other end 292 of the supply pipe 290 may be configured to be connected to the connector 330c of the mixing unit 330 of the mixing apparatus 300 . . In this configuration, as the supply tube 294 is formed of a material that can be bent and deformed, the relative position of the movable solidification carrier 200 and the mixing device 300 for supplying the modified soil to the soft ground 60 while moving Even if ? is somewhat fluctuated, it becomes possible to transfer 54 the solidified material in the powder state from the solidified material chamber 210 to the mixing unit 330 through the bendable and deformable supply pipe 290 .

Therefore, the mixing device 300 proceeds with a mixing process of mixing the raw sand 98 of the soft ground 60 with the solidified material 97 being supplied in real time through the supply pipe 290 on the soft ground 60 . It is not necessary to stop in order to receive the supply of solid fire while doing so. That is, while the solidified material 97 and the raw soil 98 are mixed by the mixing device 300 to produce the modified soil 99 in the soft ground 60 , the solidified material transporter through the supply pipe 290 A solidification material may be supplied to the mixing device 300 from 200 . Through this, by supplying the solidifying material 97 in powder state from the solidifying material carrier 200 to the mixing device 300 through the flexible supply pipe 290, the mixing device 300 moves while continuing the surface layer solidification operation. During the process, it is possible to supply the solidification material 97 from the solidification material carrier 200 without leakage, so that the surface layer solidification process of the soft ground 60 can be continuously continued to obtain an advantageous effect of increasing the process efficiency.

On the other hand, the supply pipe 290 is separated independently, and if necessary, one end 291 and the other end 292 are connected to the outlet 210b of the solidification chamber 210 and the inlet 310a of the mixing unit 330, respectively. It can be used to transfer 54 of the solidification material 97 by connecting to each other. According to another embodiment of the present invention, any one of both ends of the supply pipe 290 is fixed to any one of the outlet 210b of the solidification chamber 210 and the inlet 310a of the mixing unit 330. It may be installed and coupled to the other of the outlet 210b of the solidification chamber 210 and the inlet 310a of the mixing unit 330 with the unfixed end only when the transfer of the solidification material 97 is required. have.

The mixing device 300, as shown in FIGS. 6B to 8, is a caterpillar type including parts surrounding a plurality of wheels, such as a tank, so that it can move by itself while dispersing the load applied to the soft ground 60 The wheel 310, the extension member 320 that is extended in the form of a two-section link extending from the main body 301 to allow mixing within a predetermined radius without moving the main body 201, and the extension member 320 The coupling plate (335a) is coupled to the end of the mixing member (332, 332') is formed to protrude from the rotating body (334) and rotates integrally while mixing the solidification material (97) and the raw soil (98) and a mixing unit 330 .

Here, the mixing unit 330 may be formed in various ways in which the rotating shaft 33 is disposed in a direction parallel to the ground, for example, as shown in FIG. 7 , coupled to the extension member 320 . The mixing member 332 of the first group 330A is rotatably formed in a bite shape protruding from the rotating body 335 of the one end of the fixed frame 335 with respect to the rotating shaft 33, and the fixed frame ( The mixing member 332 of the second group 330B may be rotatably formed in the shape of a bite on the rotating body of the other end of the 335 . Each mixing member 332 is arranged not only to protrude in a rotating circumferential direction component, but also to have a direction component away from or closer to the fixed frame 335 (ie, a direction component toward the rotation axis 33 ). For example, the mixing members 332 of the first group 330A and the second group 330B are arranged in two rows along the circumferential direction, and the outer row is formed to protrude in a direction apart from the fixing frame 335 and , the inner row may be formed to protrude in a gathered direction toward the fixing frame 335 . Through this, it is possible to increase the mixing efficiency of the solidification material 97 and the raw soil 98 by one rotation of the mixing unit 330 and to generate the modified soil 99 homogeneously mixed.

According to another embodiment of the present invention, the mixing unit 330 ′ may be formed in a direction in which the rotating shaft 34 faces the ground as shown in FIG. 8 , and is perpendicular to the rotating shaft 34 from the fixed frame 335 . The mixing member 332' is formed to protrude in the form of a bite in one direction, and the extension bar 336 is coupled to the mixing member 332' to extend the protruding length of the mixing member 332'. have. Also, the mixing member 332 ″ may be formed to protrude in a direction inclined to the rotation shaft 34 in the shape of a bite at the front end of the fixed frame 335 .

That is, the mixing units 330 and 330' according to the present invention can mix the raw soil 98 directly from the soft ground 60 with the solidification material 97 supplied, the mixing members 332, 332', 332 ") can be formed to protrude in various shapes. According to one embodiment of the present invention, the raw soil 98 of the soft ground 60 is a mixing device 300 as soil excavated by a separate excavator 400. may be configured to mix with the solidifying material 97 by the It may be configured to produce improved soil 99 by mixing it with the solidification material 97 while excavating the raw soil 98 from it.

On the other hand, according to an embodiment of the present invention, as shown in Figure 6a, the solidification material 97 from the solidification material carrier 200 is the first mixing position of the soft ground 60 through the supply pipe 290 ( After being supplied to P1), as shown in FIG. 6b , it may be configured to mix the solidified material 97 and the raw soil 98 supplied by the mixing device 300 to produce the modified soil 99 . .

Further, according to another embodiment of the present invention, as shown in FIG. 7 , the other end 292 of the supply pipe 290 is connected to the mixing unit 330 of the mixing device 300 , and the solidified material carrier 200 ) through the mixing unit 330 through the supply pipe 290 from the solidification material 97 can be supplied to the mixing positions (P1, P2, P3, ..). That is, the mixing unit 330 is provided with a connector 330c, and when the other end 292 of the supply pipe 290 is connected to the connector 330c, the solidified material supply pipe 336 is connected from the connector 330c to the mixing members. (332) is formed extending to the location.

Through this, as the supply pipe 292 is installed to directly connect the solidified material carrier 200 and the mixing unit 330 , the mixing device 300 continuously moves the solidified material 97 while moving on the soft ground 60 . It is possible to receive the supply, and it is possible to obtain the effect that the process of producing the improved soil 99 mixed with the solidification material 97 and the raw soil 98 can be continuously performed without interruption.

In addition to this, the solidification material 97 is supplied to the end of the mixing unit 330 by a certain amount per unit time through the supply pipe 290 and the solidification material supply pipe 336 from the solidification material carrier 200, Not only can the ratio of mixing the fire 97 and the raw soil 98 be accurately adjusted, but the solidified material 97 is wind It is possible to obtain the effect of completely eliminating the possibility of being blown away and causing air pollution.

In addition, the connector 330c of the mixing unit 330 is also connected to the liquid supply pipe 710 of the liquid supply unit 700 , and the mixing unit 330 is a liquid supplied through the liquid supply pipe 710 connected to the connector 330c. and a liquid ejection tube 339 for ejecting the liquid toward the mixing member 332 during the mixing process. Through this, during the mixing process of the solidified material 97 and the raw soil 98 supplied in real time by the mixing unit 330, the possibility that a part of the solidified material is blown into the atmosphere and causes air pollution is completely eliminated. can

As described above, after the solidifying material 97 and the raw soil 98 are mixed at a predetermined mixing ratio by the mixing device 300 to produce the modified soil 99, the modified soil 99 is the raw soil with a high water content. Since it is homogeneously mixed with 98, the fine powder solidified material contained in the improved soil 99 is blown away by the wind and does not pollute the surrounding air. Therefore, the improved soil 99 in the state where the mixing process is completed does not generate air pollution.

On the other hand, as shown in FIG. 6A , when the water content of the raw soil 98 is low while the solidifying material 97 is supplied, there is a risk of being dispersed into the surrounding atmosphere. And, even if the raw sand 98 is mixed with the mixing member 332 while supplying the solidifying material 97 as shown in FIG. 7 , when the raw soil of the soft ground 60 is sandy soil with a low water content, the wind There is a possibility that it will blow up and pollute the surrounding air.

In order to prevent such air pollution, as shown in Figure 6a, the liquid supply unit 700 moves the liquid supply pipe 710 to the mixing positions (P1, P2, ..) to spray the liquid into several branches. Accordingly, it is possible to minimize the scattering of the solidification material 97 supplied through the supply pipe 290 .

In addition, as shown in FIG. 7 , by connecting the liquid supply pipe 710 to the connector 330c of the mixing unit 330 , the solidification material 97 and the raw soil 98 are mixed from the liquid injection pipe 339 . It is possible to suppress the scattering of the solidifying material 97 and the raw soil 98 of the sandy soil component by spraying the liquid to the part to be used. The liquid supply from the liquid supply unit 710 is mainly performed when the raw soil 98 is sandy soil, and may be performed to more reliably suppress scattering of solidified materials even for raw soil with a high water content.

Here, the liquid 88 may be water. Through this, by increasing the water content by spraying water in the process of mixing the raw sand 98, which is sandy soil, with the solidification material 97 at a predetermined ratio, the improved material produced by mixing the solidification material 97 and the raw soil 98 It is possible to prevent the soil 99 from scattering on the soft ground 60 .

More preferably, the liquid 88 supplied from the liquid supply unit 360 includes a liquid solidifying material including any one of an enzyme and a polymer such as an acrylic polymer, a styrene-butadiene emulsion, or a styrene-butadiene-latex emulsion. can be configured.

Here, the polymer such as an acrylic polymer is usually a white liquid substance, and is easily dispersed in water by itself, so it can be used by diluting and adjusting the concentration. Since it is evenly attached to the soil particles, after curing and drying, it is not irreversibly dissolved in water again and hardens the soil, so that excellent performance in hardening and waterproofing of the raw soil 98 can be obtained.

And, the enzyme (enzyme) uses a urease extract by removing the water-insoluble component from the urease active microorganism culture solution. When an enzyme is mixed with water and sprayed on the raw soil 98, urea in the soil is decomposed into ammonia ions and carbonate ions, and the carbonate ions react with surrounding calcium ions _{to produce calcium carbonate (CaCO 3} ), which is a cement Calcium hydroxide reacts with carbon dioxide to produce calcium carbonate during the hardening process of cement, which is the same as the process of hardening cement, and an enzymatic cementation effect can be obtained. For example, the enzyme may be applied with urease, which hydrolyzes urea.

CO(NH ₂ ) ₂ + 2H ₂ O →(Urease)→ 2NH ⁴⁺ + CO ₃ ^2-

Ca ²⁺ + CO ₃ ^2- → CaCO ₃

Comparing the case where the liquid is used with water and the case where the liquid solidifying material is included, the liquid solidifying material has a higher viscosity than water and has an adsorption power, so fine powder solidifying material is scattered from the modified soil 99 even if a small amount is supplied. can be prevented more effectively. The liquid solidifying material fills the pores of the soil and has the advantage of excellent waterproofing effect. In other words, when an enzyme or polymer, which is a liquid solidifying material, is supplied to the modified soil, not only can the water content be increased, but also an advantageous effect can be obtained in terms of accelerating the solidification of the soil.

Hereinafter, with reference to the accompanying drawings, the surface layer solidification method using the surface layer solidification apparatus 1 of the present invention configured as described above will be described in detail.

Step 1 : First, the solidifying material in powder form is stored in the silo 100. (S100) The silo 100 is formed in a horizontal form with a smaller height (H) compared to the length (L), and includes a flexible tube and It is stored in an airtight state without leakage of solidified powder in the form of powder to the outside by a non-spindle screw.

Since the amount of solidification required per day for the surface layer solidification process of the soft ground is approximately 120 tons, the capacity of the silo 100 can be formed to accommodate the solidification material 97 weighing 30 to 40 tons, 3 times a day ~4 fillings can be made.

In general, when the 30 ton capacity silo 100 is installed in a vertical gravity type, its own weight is concentrated on the ground, so it is not suitable for installation in a soft ground. Furthermore, the silo 100 is preferably disposed outside the soft ground 60 in which the surface solidification process is performed, but in some cases, it may be disposed on the soft ground 60 in which the surface solidification process is performed.

Therefore, it is preferable that the silo 100 is installed as a horizontal silo having a relatively large load distribution area since the length L with respect to the height H is larger. And, since the solidified material in powder form accommodated in the horizontal silo 100 cannot be discharged by gravity, a transfer screw 195 as a spindleless blade that enables powder transfer in the flexible tube 194 is provided. discharged by the conveying pipe 190 .

Step 2 : The solidified material 97 stored in the silo 100 is transferred to the solidified material chamber 210 of the solidified material transporter 200 through the airtight transport pipe 190 and mounted (S120).

At this time, the transfer pipe 190 connecting the solidification chamber 210 and the silo 100 is formed of a bendable transfer tube 194 and a spindleless transfer screw 195 rotatably installed therein. can be Through this, even if there is a position deviation of the solidified material transporter 200 with respect to the silo 100, the solidified material 97 in powder form is transferred to the solidified material chamber 210 through the transfer pipe 190 without any setback and without leakage to the outside air. It can be transported 51 and mounted on the solid fire carrier 200 .

According to one embodiment of the present invention, the conveying pipe 190 has one end 191 fixed to the outlet 130 of the silo 100, so that the solidified material carrier 200 returns from the soft ground 60 (72). When the other end 192 of the transfer pipe 190 is coupled to the inlet 210a of the solidification chamber 210 , the solidification material 97 is transferred to the solidification chamber 210 .

At this time, as shown in FIG. 5, when the solidification material 97 is sufficiently filled in the solidification chamber 210, the dispersion unit rotates the rotation shafts 214s and 215s, and the blades 214x formed in opposite directions to each other. 214y; 215x, 215y) horizontally moves 52 the solidifying material 97 at the center of the chamber toward the edge of the chamber.

Through this, it is possible to fill the predetermined internal space of the solidification chamber 210 without empty space, so that the solidification material 97 of the predetermined capacity of the solidification chamber 210 can be accurately loaded and transported, and at the same time, the solidification chamber 210 can be transported. It is possible to obtain the advantage of reducing the weight of the solid fire carrier 200 by minimizing the amount of the casing 211 required to manufacture the 210 .

For example, the solidified material transporter 200 may include a solidified material chamber 210 accommodating 3.75 tons of solidified material at a time, and transports and supplies the solidified material to the mixing device 300 twice per hour. . Accordingly, if two solidified material carriers 200 are used, 15 tons of solidified material per hour can be supplied to the mixing device 300 .

Step 3 : Then, the solidified material transporter 200 is filled with the solidified material in the closed solidified chamber 210 and moves on its own in the soft ground 60 at a mixing position P1, where the modified soil 99 is created. The solidified material 97 is transported to the first mixing position P1 by moving (71) to the vicinity of the first mixing position P1, which is any one of P2, P3, ...) (S130).

As shown in the figure, since the solid fire carrier 200 moves with the caterpillar wheels 220, the weight of the solid fire loaded by the calculated amount and the weight of the vehicle itself is distributed, and does not cause subsidence of the soft ground can move without

Step 4 : Then, as shown in FIG. 6A , one end 291 of the supply pipe 290 is connected with the solidification chamber 210 of the solidification material carrier 200, and the supply pipe 290 is blocked from outside air. ) to maintain the sealed state and supply 54 the solidifying material 97 in the powder state from the other end 292 of the supply pipe 290 to the first mixing position P1.

At this time, the liquid 88 is sprayed onto the solidified material 97 supplied with the liquid 88 from the liquid supply unit 700 to suppress scattering of the solidified material into the air. Here, the liquid 88 may be water or a liquid containing a polymer or an enzyme. By supplying the liquid, it is possible to prevent the fine powder solidified material from being blown into the atmosphere by wind or the like to contaminate it.

Meanwhile, in the process of inserting and coupling one end 291 of the supply pipe 290 to the outlet 210b of the solidification chamber 210, the solidification material may leak and pollute the surrounding atmosphere. Therefore, before inserting one end 291 of the supply pipe 290, the opening/closing covers 217 and 218 installed at the outlet 210b of the solidification chamber 210 are placed in a closed state, and the supply pipe 290 is placed in a closed state. It fundamentally prevents the leakage of solidified materials during the combined installation process.

Step 5 : While step 4 is being performed or after step 4 is performed, as shown in FIG. 6B , the solidified material 97 supplied to the first mixing location P1 is mixed with a soft ground by using the mixing device 300 . Mixed with the raw soil 98 of (60) to produce the improved soil 99 (S160).

To this end, first, when one end 291 of the supply pipe 290 is completely coupled to the outlet 210b of the solidification chamber 210, the opening/closing covers 217 and 218 are placed in an open state to expose each plate. A path 53 passing through the hole 217a and the through hole 218a allows the solidification material 97 to be transferred from the solidification material chamber 210 to the supply pipe 290 . Then, the solidifying material 97 is supplied to the first mixing position P1 through the supply pipe 290 .

Also in the process of generating the modified soil 99 , the liquid 88 is sprayed from the liquid supply 700 to the mixing member 332 , and the modified soil is produced by mixing and combining the solidifying material 97 and the raw soil 98 . Avoid scattering into the air during the process. Here, the liquid 88 may be water or a liquid containing a polymer or an enzyme. By supplying liquid during the production process of the modified soil 99, the solidifying material 97 and the raw soil 98 are more firmly combined, and the fine powder solidified material mixed in the modified soil 99 by wind or the like is in the air. It can be prevented from being blown up and polluted. When the liquid 88 supplied from the liquid supply unit 360 is a liquid solidifying material containing a polymer or an enzyme, in addition to promoting the bonding of the solidifying material 97 and the raw soil 98, it is supplied to the ground and compacted It is possible to obtain the advantage of shortening the curing process after the process.

If necessary, the raw sand 98 of the soft ground 60 may be picked up with the excavator 400 and supplied to the place where the mixing unit 330 is located. For example, the excavator 400 may supply 50 m ³ of raw sand 98 per hour to the mixing device 300, so that 100 m ³ of raw sand 98 per hour using two excavators is mixed with the mixing device 300 . can be supplied continuously.

Meanwhile, according to another embodiment of the present invention, steps 4 and 5 may be simultaneously performed using the configuration shown in FIG. 7 .

That is, one end 291 of the supply pipe 290 is connected to the solidification chamber 210 of the solidification material carrier 200 , and the other end 292 of the supply pipe 290 is connected to the connector 330c of the mixing device 300 . ), instead of directly supplying the solidifying material 97 to the first mixing position P1, it is supplied through the mixing device 300 .

In other words, the raw soil 98 is excavated while rotating the mixing member 332 of the mixing unit 330 at the first mixing position P1 of the soft ground 60, and at the same time, the solidification chamber 210 The solidification material 97 is supplied to the raw soil 98 while sequentially passing through the supply pipe 290 and the solidification material supply pipe 336 (S140), and at the same time, the mixing member 332 of the mixing unit 330 is While rotating, the raw soil 98 and the solidification material 97 are mixed to produce the modified soil 99 on the fly (S150).

The supply pipe 290 may be formed of a hard material such as metal. According to a preferred embodiment of the present invention, the supply pipe 290 connecting the solidification chamber 210 and the mixing unit 330 includes a flexible supply tube 294 capable of bending and rotatably installed therein. It may be formed with a spindleless conveying screw 295 . Accordingly, in a state in which the supply pipe 290 is connected to the solidification chamber 210, even while the mixing device 300 is moving while working, the mixing device 300 is formed by the supply pipe 290 capable of bending and deforming. ) and the movement speed and movement distance of the solid material carrier 200, even if a deviation occurs, this deviation is accommodated by the supply pipe 290 to which bending deformation is allowed, so the mixing device 300 is improved without stopping the operation It is possible to obtain an advantageous effect of continuously producing the soil 99 and performing the process of continuously supplying it. Through this, it is possible to further improve the efficiency of the improvement process of the soft ground.

In addition, since the solidified material supply pipe 336 extends below the rotation center of the rotating body 334 , the solidified material 97 supplied through the solidified material supply pipe 336 is hardly exposed to the outside, but the connector 330c ) through the liquid supply pipe 710 connected to the liquid 88 such as water or liquid solidifying material is supplied to the lower part of the mixing member 332 rotating through the liquid injection pipe 339, the solidifying material 97 and the circle While the soil 98 is mixed to produce improved soil, it is dispersed to the outside and does not cause air pollution.

And, when the worker of the mixing apparatus 300 puts the solidifying material 97 into the mixing unit 330 of the mixing apparatus 300, the supply pipe 290 is connected to the connector 330c of the mixing unit 330. Since it is fixed to the , it is not necessary to pay attention to the input process of the solidification material, and it is enough to care only about mixing the solidification material 97 and the raw soil 98 that are being supplied in an appropriate ratio. In this way, since the worker of the mixing device 300 and the worker of the solid fire carrier 200 are separated from each other and proceed to individual tasks, it is possible to obtain the advantage of reducing errors and securing work safety by concentrating on their respective roles.

For example, the solidification carrier 200 takes about 8 minutes to fill the solidification material chamber 210 from the silo 100 with the powder solidification material 97 in step 2, and the soft ground 60 It takes 5 minutes to cross and reach the mixing device 300, and it takes 12 minutes to supply the solidification material in powder form accommodated in the solidification chamber 210 to the mixing unit 330 of the mixing apparatus 300, , which took 25 minutes in total.

The mixing device 300 moves the soft ground 60 while moving the soft ground 60 in step 4 and step at several mixing locations P1, P2, P3 until it produces the modified soil 99 that can cover the entirety of the soft ground 60. 5 will be done.

At this time, the amount of solidifying material to be mixed may vary depending on the water content and soil quality of the base soil, and since it should be mixed homogeneously, by adjusting the feeding speed (rotation speed) of the screw of the supply pipe 290, the solidified material to be input ( 97) and raw soil 98 can be combined at a fixed rate.

Step 6 : When the modified soil 99 remains at the first mixing position P1 of the soft ground 60 by the mixing device 300, as shown in FIG. 99) to evenly disperse it (S160).

Since the dozer 500 also moves (500d) to the caterpillar wheel 510, it does not cause subsidence of the soft ground, and the modified soil 99 unevenly distributed by the mixing device 300 is surrounded by a uniform thickness. evenly distributed over

Step 7 : Then, a process of compacting the uniformly dispersed modified soil 88 by the compaction roller 600 is performed (S170). As a result, as the pozzolan reaction occurs, the solidifying material 97 and the raw soil 98 are chemically integrated, thereby improving the bearing capacity of the soft ground.

The surface layer solidification method (S100) of the soft ground according to the present invention configured as described above is a powder through the sealed chambers 100 and 210 and the sealed pipes 190, 290 from the silo 100 to the mixing device 300. Since the solidification material 97 in the form is supplied, it is possible to obtain an advantageous effect of preventing the scattering of the solidification material and improving the working environment.

In addition, since the present invention does not use sacks, so waste is not generated, and the price of sacks and packaging and transport costs can be reduced, so it is possible to obtain the effect of lowering the cost required to improve the soft ground.

Furthermore, the present invention can also obtain the advantage of economical construction compared to the prior art by increasing the working speed and efficiency by using the caterpillar-type solid material transporter 200 and a flexible pipe capable of bending deformation.

In addition, in the present invention, by supplying the solidifying material by connecting the supply pipe to the connector of the mixing unit, the supply of the solidifying material and the generation of the improved soil are simultaneously performed, so that the work efficiency is improved and the improvement work of the soft ground can be performed in a shorter period. It has the effect of ending it.

In the above, preferred embodiments of the present invention have been exemplarily described, but the scope of the present invention is not limited only to such specific embodiments, and can be appropriately changed within the scope described in the claims.

1: surface solidification device 100: silo
190: conveying pipe 200: solid fire carrier
210: solid fire chamber 210x: cross-section area
214: transverse dispersion unit 215: longitudinal dispersion unit
217: fixed plate 218: moving plate
220: caterpillar wheel 300: mixing device
330: mixing unit 330c: connector
336: solid fire supply pipe 339: liquid injection pipe
290: supply pipe 294: flexible supply tube
295: spindleless feed blade 400: excavator
500: compaction roller 600: dozer
700: liquid supply 97: solid fire
98: original soil 99: improved soil

Claims (14)

delete As a surface layer solidification method of soft ground,
A solidification material storage step of storing the solidification material in powder form in a silo;
A rotary shaft that is disposed at a height between the middle height and the upper end of the solidification chamber and is rotationally driven by loading the solidified material stored in the silo in a sealed solidification chamber provided in the solidification transporter through a transfer pipe; A first transfer blade coupled in a first helical direction to a first area from the center to one end of the rotation shaft, and a second transfer blade coupled in a direction opposite to the first helical direction to a second area from the center to the other end of the rotation shaft a solidifying material loading step comprising a solidifying material dispersing step of dispersing the solidified material in a horizontal direction in the interior of the solidified fire chamber by a dispersing unit including a blade;
a solidifying material transport step of moving the solidifying material transporter to a position capable of supplying the solidified material to a first mixed position where the modified soil is to be produced on the soft ground;
a solidification material supply step of supplying the solidification material from the solidification material carrier to the first mixing position;
a raw soil improvement step of mixing the solidified material and the raw soil at the first mixing position on a soft ground by a mixing unit of a mixing device to produce the modified soil;
The modified soil solidification step of curing the modified soil after compacting it with a compaction roller;
The surface layer solidification method of the soft ground, characterized in that it comprises.
As a surface layer solidification method of soft ground,
A solidification material storage step of storing the solidification material in powder form in a silo;
a solidified material loading step of loading the solidified material stored in the silo into a closed solidified fire chamber provided in a solidified material transporter through a transfer pipe;
a solidifying material transport step of moving the solidifying material transporter to a position capable of supplying the solidified material to a first mixed position where the modified soil is to be produced on the soft ground;
A solidified material supply for supplying the solidified material to the first mixing position from the solidified material transporter through a supply pipe having a bendable and deformable supply tube and a spindleless conveying screw for transporting the solidified material in the supplying tube. step;
a raw soil improvement step of mixing the solidified material and the raw soil at the first mixing position on a soft ground by a mixing unit of a mixing device to produce the modified soil;
The modified soil solidification step of curing the modified soil after compacting it with a compaction roller;
Constructed to include, by connecting the solidification chamber and the mixing unit to supply the solidification material to the raw soil, the solidification material is supplied even while the mixing device is moving, the solidification material supply step and the raw soil improvement step A surface layer solidification method of soft ground, characterized in that it is carried out at the same time.
As a surface layer solidification method of soft ground,
A solidification material storage step of storing the solidification material in powder form in a silo;
a solidified material loading step of loading the solidified material stored in the silo into a closed solidified fire chamber provided in a solidified material transporter through a transfer pipe;
a solidifying material transport step of moving the solidifying material transporter to a position capable of supplying the solidified material to a first mixed position where the modified soil is to be produced on the soft ground;
Prepare a supply pipe that is detachably coupled to the discharge unit located at the lower side of the solidification chamber of the solidification material carrier, and couple the supply pipe to the discharge unit with the opening/closing cover of the discharge unit closed, and then an opening/closing cover operation step of opening the opening/closing cover to the ;
a solidifying material supply step of supplying the solidified material from the solidified material carrier to the first mixing position through the supply pipe after the opening/closing cover operation step;
a raw soil improvement step of mixing the solidified material and the raw soil at the first mixing position on a soft ground by a mixing unit of a mixing device to produce the modified soil;
The modified soil solidification step of curing the modified soil after compacting it with a compaction roller;
The surface layer solidification method of the soft ground, characterized in that it comprises.
5. The method according to any one of claims 2 to 4,
a liquid supply step of supplying a liquid to the first mixing position while at least one of the solidification material supply step and the raw soil improvement step is performed;
The surface layer solidification method of the soft ground, characterized in that it further comprises.
6. The method of claim 5,
The liquid is an acrylic polymer, a styrene-butadiene emulsion, a styrene-butadiene-latex emulsion, and a surface layer solidification method of soft ground, characterized in that it contains any one liquid solidifying material among enzymes.
delete As a device used in the surface layer solidification method of soft ground,
a silo for accommodating the solidified material in powder form;
A solidification chamber in a closed state that is filled by receiving the solidification material from the silo is provided, and the solidification material can be supplied to the first mixing position where the modified soil is to be produced on the soft ground by moving to the caterpillar wheel. a solid fire carrier moving to the location;
a supply pipe connected to the solidification chamber and supplying the solidification material filled in the solidification chamber to the first mixing position so as not to leak to the outside air;
a mixing device having a mixing unit in which a plurality of mixing members protrude from an outer surface and rotate, and mixing the solidified material and raw soil supplied to the first mixing position on the soft ground to produce the modified soil;
a compaction roller for compacting the improved soil generated by the mixing unit;
wherein the supply pipe includes a bendable supply tube and a spindleless conveying screw for transporting the solidification material in the supply tube, and connecting the solidification material chamber and the mixing unit to remove the solidification material Surface layer solidification device of soft ground, characterized in that supplied to the raw soil.
As a device used in the surface layer solidification method of soft ground,
a silo for accommodating the solidified material in powder form;
A solidification chamber in a closed state that is filled by receiving the solidification material from the silo is provided, and the solidification material can be supplied to the first mixing position where the modified soil is to be produced on the soft ground by moving to the caterpillar wheel. a solid fire carrier moving to the location;
a supply pipe connected to the solidification chamber and supplying the solidification material filled in the solidification chamber to the first mixing position so as not to leak to the outside air;
a mixing device having a mixing unit in which a plurality of mixing members protrude from an outer surface and rotate, and mixing the solidified material and raw soil supplied to the first mixing position on the soft ground to produce the modified soil;
a compaction roller for compacting the improved soil generated by the mixing unit;
The supply pipe is detachably coupled to the solidified material carrier, and the outlet located at the lower side of the solidified fire chamber to which the supply pipe is coupled is provided with an opening and closing cover that can be opened and closed to prevent the outflow of the solidified material. Surface layer solidification device of soft ground, characterized in that.
As a device used in the surface layer solidification method of soft ground,
a silo for accommodating the solidified material in powder form;
A solidification chamber in a closed state that is filled by receiving the solidification material from the silo is provided, and the solidification material can be supplied to the first mixing position where the modified soil is to be produced on the soft ground by moving to the caterpillar wheel. a solid fire carrier moving to the location;
a supply pipe connected to the solidification chamber and supplying the solidification material filled in the solidification chamber to the first mixing position so as not to leak to the outside air;
a mixing device having a mixing unit in which a plurality of mixing members protrude from an outer surface and rotate, and mixing the solidified material and raw soil supplied to the first mixing position on the soft ground to produce the modified soil;
a compaction roller for compacting the improved soil generated by the mixing unit;
In the soft ground, characterized in that the solidification material is supplied to the first mixing position from the solidification material carrier through the supply pipe while the solidification material and the raw soil sand are mixed by the mixing unit. Surface solidification device.
As a device used in the surface layer solidification method of soft ground,
a silo for accommodating the solidified material in powder form;
A solidification chamber in a closed state that is filled by receiving the solidification material from the silo is provided, and the solidification material can be supplied to the first mixing position where the modified soil is to be produced on the soft ground by moving to the caterpillar wheel. a solid fire carrier that moves to a location, but moves on the soft ground with a wheel in the form of a caterpillar;
a supply pipe connected to the solidification chamber and supplying the solidification material filled in the solidification chamber to the first mixing position so as not to leak to the outside air;
a mixing device having a mixing unit in which a plurality of mixing members protrude from an outer surface and rotate, and mixing the solidified material and raw soil supplied to the first mixing position on the soft ground to produce the modified soil;
a compaction roller for compacting the improved soil generated by the mixing unit;
The surface layer solidification apparatus of soft ground, characterized in that the solidification chamber is provided with an inclined region in the lower portion of which the receiving width is gradually narrowed.
12. The method of claim 11,
a rotating shaft driven to rotate;
a first transfer blade coupled in a first spiral direction to a first area from the center of the rotation shaft to one end;
a second transfer blade coupled to a second area from the center of the rotation shaft to the other end in a direction opposite to the first helical direction;
a dispersing unit in which the rotating shaft is rotatably disposed at a height between a middle height and an upper end of the solidification chamber to disperse the solidification material in a horizontal direction in the solidification chamber;
Surface layer solidification device of the soft ground, characterized in that it further comprises.
13. The method according to any one of claims 8 to 12,
a liquid supply unit supplying the liquid to the first mixing position while supplying the solidified material to the first mixing position or mixing the solidified material with the raw soil sand by the mixing device;
Surface layer solidification device of the soft ground, characterized in that it further comprises.
14. The method of claim 13,
The liquid is an acrylic polymer, a styrene-butadiene emulsion, a styrene-butadiene-latex emulsion, and a surface layer solidification device of soft ground, characterized in that it comprises any one liquid solidifying material among enzymes.

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