KR102259616B1 - Method of solidifying surface of soft ground with preventing particle of solidifying agent from flying and being scattered - Google Patents

Abstract

The present invention provides a method for solidifying the surface layer of soft ground and an apparatus used therefor. The method comprises: a solidifying agent storage step of storing a powder-type solidifying material in a silo; a solidifying agent transport step of filling a sealed solidifying agent chamber with the solidifying agent stored in the silo through a transfer pipe without leakage of the solidifying agent, and moving, to an improved soil supply, a solidifying agent transporter that transports the solidifying agent chamber; a solidifying agent supply step of supplying the solidifying agent from the solidifying agent chamber to a sealed accommodation chamber provided in the improved soil supply through a supply pipe; an improved soil generation step of generating, in the improved soil supply, improved soil in which the soil of the soft ground and the solidifying agent are mixed; an improved soil supply step of supplying the improved soil while the improved soil supply moves on the soft ground; an improved soil distribution step of more widely distributing the improved soil supplied from the improved soil supply by a dozer; an improved soil compaction step of compacting the improved soil distributed by the doser with a compaction roller; and a curing step of curing the improved soil. The method not only fundamentally prevents air pollution as the powder-type solidifying agent is not leaked to the atmosphere while the surface layer of the soft ground is solidified, but also reduces the cost of the improvement work and increases working speed, thereby reducing the time and cost required for the 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, a predetermined 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 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. whose N value of the standard penetration test is 0 to 4, 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 original soil and soil at a fixed ratio with the solidifying material, 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 5 m of the lower surface of the earth's surface is mined with an excavator, put into a modified soil feeder, mixed with a powder solidifying material at a predetermined ratio in a stirring unit to produce improved soil, and compacted using a dozer and roller It goes through the work 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-mentioned raw material is subjected to a pozzolan reaction under water. 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

When the ettringite crystals grow in the hardened body of the solidified modified soil, it expands while pushing between the hardened particles or between the hydrates by the generated pressure accompanying the growth, thereby improving the shrinkage of the hardened ground after curing and obtaining the effect of introducing chemical prestress. 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 confining moisture in the soil and solidifies, and is hardened by 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, in a high fire production plant, each 1 ton 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 to several locations as much as the amount used by the modified soil feeder at one place. Place a tonma bag or tonbag containing solidified materials on the Then, with a separate lifting device such as a crane, the sack was inserted into the high fire hopper at the top of the modified soil feeder as it was, and 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 modified soil feeder, at the moment of tearing the tonnage, fine solidified powder in the nanometer unit is spread into the atmosphere, and the solidified material is exposed to the atmosphere. It was also blown away 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, there is the inconvenience of separately performing the process of locating the tonnage stand in various places on the soft ground, and the tonnage stand is manually packed every day, and the seal is manually released at the site, and a lifting device 5 to 6 times per hour The process of repeatedly inputting into the modified soil feeder by using a long time was delayed, and there was a problem that the surface solidification process had to be stopped frequently in the process of inputting the solidified material of tonma.

In addition, the cost of sackcloth is about 15% compared to relatively cheap solidified materials. As the bottom 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 flowing 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 cost and increase the working speed, thereby reducing the time and cost of the improvement work of the soft ground.

And, an object of the present invention is to make it possible to accurately transfer the solidified material in the powder state without leakage even if the positions of the devices such as the modified soil feeder and the solidified material transporter are not accurate.

In particular, an object of the present invention is to prevent subsidence of the original ground by a solid fire carrier that reciprocates from a silo to an improvement site where an improved soil feeder is located and to secure the safety of movement.

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 object as described above, 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 transport step of filling the solidified material stored in the silo into the closed solidified fire chamber without leakage of the solidified material through a transfer pipe, and moving the solidified material transporter for transporting the solidified fire chamber to the modified soil supply; a solidifying material supplying step of supplying the solidified material from the solidified material chamber to the sealed accommodation chamber provided in the modified soil supply unit through a supply pipe; an improved soil generating step of generating, in the modified soil feeder, the modified soil mixed with the soil of the soft ground and the solidified material; an improved soil supply step of supplying the modified soil while the modified soil supply unit moves the soft ground; an improved soil dispersing step of more widely dispersing the modified soil supplied from the modified soil feeder by a dozer; an improved soil compaction step of compacting the modified soil dispersed by the doser with a compaction roller; A curing step of curing the modified soil; 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, comprising: a silo for accommodating a solidifying material in powder form; The receiving chamber receiving and receiving the solidified material from the silo is accommodated in a closed state, and the modified soil generated by stirring the soil of the soft ground to be reformed and the solidified material supplied from the receiving chamber is filled in the ground to be filled. A modified soil feeder to supply; a solidification material carrier having a solidification chamber in a closed state that is filled by receiving the solidification material from the silo, and moves in a caterpillar form and supplies the solidification material filled in the solidification chamber to the accommodation chamber; a supply pipe connecting the solidification chamber and the accommodating chamber to supply the solidified material filled in the solidification chamber to the accommodating chamber so as not to leak to the outside; a compaction roller for compacting the modified soil supplied from the modified soil feeder; 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 a powder state does not leak to the outside air to the extent that it may pollute the atmosphere.

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 inputting the tonnage bag by excluding the use of the tonnage bag during the surface layer solidification process of the soft ground. A beneficial effect can be obtained in solving

At the same time, the present invention eliminates the use of a tonnage belt, which has a high cost ratio compared to the solid material, 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 provides an advantageous effect of completely removing the solidified material flowing out to the outside air by supplying the solidified material in the powder state that is input to the improvement work of the soft ground to the closed chamber using a pipe sealed with the outside air. can

In addition, the present invention reduces air pollution by supplying the solidified material using a flexible pipe, so that the solidified material in the powder state can be accurately transferred without leakage even if the positions of the devices such as the modified soil feeder and the solidified material transporter are not accurate. You can definitely get a preventative effect.

In particular, the present invention is configured to reduce the chamber weight by lowering the height of the solid fire chamber of the solid fire carrier, and to fill the solid fire chamber with minimal empty space. By minimizing the weight of the solid fire carrier, it is possible to prevent the 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.

In addition, the present invention supplies solidified material in powder form from the solidified material carrier to the modified soil feeder through a flexible supply pipe, thereby supplying the solidified material from the solidified material carrier without leakage even during the process of continuing the operation while the modified soil feeder moves. Thus, it is possible to obtain the advantageous effect of increasing the process efficiency by continuously continuing the surface layer solidification process of the soft ground.

In addition, in the process of improving soft soil with low moisture, such as sandy soil, the present invention increases the moisture content by increasing the moisture content to increase the solidification effect, thereby increasing the compaction rate of the improved soil while securing a greater bearing capacity 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;
6 is a view showing the configuration of transferring the solidified material in the powder state from the solidified material transporter to the improved soil supplier;
Fig. 7 is a perspective view showing a configuration in which a flexible supply pipe is connected to the solidification chamber of Fig. 6;
Fig. 8 is a perspective view showing the configuration through the chamber casing and the flexible tube of Fig. 7;
FIG. 9 is a view for explaining the configuration of an opening/closing cover of an outlet of the solidification chamber of FIG. 8;

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 , the solidified material loading step (S120) of loading the solidified material 97 stored in the silo 100 on the solidified material transporter 200, and the modified soil supplying machine 300 in which the solidified material transporter 200 is operated on soft ground ) moving to the solidified material transport step (S130), and the solidified material supply step (S140) of supplying the solidified material 97 from the solidified material transporter 200 to the modified soil feeder 300 (S140), and the soft ground (60). The raw soil supply step (S150) of supplying the raw soil 98 to be improved to the modified soil feeder 300, and the modified soil 99 produced by stirring and mixing the supplied solidification material 97 and the raw soil 98 ) of the modified soil supply step (S160) of supplying the soft ground (60), the modified soil dispersing step (S170) of widely dispersing the modified soil (99) supplied to the soft ground (60), and the dispersed modified soil It is configured to include an improved soil solidification step (S180) of compacting and curing to solidify.

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

Here, the solidifying material 97 contains micro-sized fine powder, and when it is put into the modified soil feeder in an existing tonma, the fine particles of the solidified material are instantly spread into the atmosphere and pollute the air in the surrounding area. The problem of making The present invention prevents air pollution caused by the outflow of solidifying material particles into the atmosphere, so that the improvement process of solidifying the surface layer of the soft ground can be performed in an environmentally friendly manner, and at the same time, the soft ground is improved in a short time using inexpensive equipment that allowed the process to be carried out.

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 is, as shown in FIG. 3 , the solidification material 97 ) and the silo 100, which receives the solidification material 97 from the silo 100, and moves to the modified soil feeder 300 that supplies the modified soil 99 on the soft ground to the solidification material 97. The solidified material transporter 200 that supplies the, the excavator 400 that excavates and supplies the raw soil 98 to be improved of the soft ground 60, and the solidified material 97 are supplied from the solidified material transporter 200 A modified soil supplier 300 for receiving raw soil 98 of the soft ground 60 from the excavator 400, mixing them in a predetermined ratio, and supplying the modified soil 99 to the soft ground 60; A dozer (500) for dispersing the modified soil (99) supplied to the soft ground (60) from the modified soil supply unit (300) to a wide periphery, and the modified soil (99) dispersed to a predetermined thickness by the dozer (500) ) is configured to include a compaction roller 600 that compacts the roller.

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 has already been 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 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 increases the height ( 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 lower portion, 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 includes a closed solidified fire chamber 210 filled with a solidified material 97 supplied from the silo 100, and a caterpillar type that allows it to move by itself while dispersing the load applied to the ground. A wheel 220 is provided.

Since the solidification carrier 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 of the solidified material as possible, without leaving the conveyed solidification material. It is very important to move to the receiving chamber 310 of the modified soil feeder 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.

For the solidified material transporter 200 of the specified 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 modified soil feeder 300 ( 71), returning to the silo 100 again (72), and supplying all of the solidified material transported to the modified soil feeder 300 without 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 390, which is a flexible screw conveyor, can be detached.

In this aspect, as shown in FIG. 5 , the solidified material chamber 210 mounted on the solidified material carrier 200 receives the solidified material 97 from the silo 100 through the conveying pipe 190 . The inlet 210a is formed at the upper side, and the outlet 210b for supplying the solidifying material 97 to the receiving chamber 310 of the modified soil feeder 300 through the supply pipe 390 is formed at the lower side.

And, the solidification chamber 210, similar to the silo 100, is formed to have a funnel-shaped inclined region 210x whose cross section is gradually smaller toward the bottom at the bottom, and a support 212 for supporting it is provided. do. Through this, it becomes possible to transfer and supply the solidified material 97 accommodated in the solidified material chamber 210 and transported to the solidified material transporter 200 to the receiving chamber 310 of the modified soil feeder 300 without leaving any residue.

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 amount of transportable solidification material 97 is reduced due to the unnecessary weight of the casing.

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 stacked high on the lower side of the inlet 210a but low on the periphery, 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 8 , the dispersion unit is rotatably arranged in different horizontal directions by the driving unit M at a height between the middle height and the upper end of the solidification chamber 210 in different horizontal directions ( 214s, 215s) and the first transfer blades (214x, 215x) coupled in the first spiral direction in the first area to one end from 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 spiral direction opposite to the first spiral 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, the solidification material 97 flowing in from the silo 100 in a state in which the dispersion unit is operating can fill the internal space of the solidification material chamber 210, thereby causing a predetermined amount of the solidification material 97. It is possible to obtain the effect that it is possible to form a smaller weight of the casing 211 of the solidification chamber 210 filling the .

An outlet 210b as a coupling portion to which the supply pipe 390 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 and closing cover.

To this end, as shown in FIGS. 5 and 9 , 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 below 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 to ensure 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 shows a configuration in which a plurality of exposed holes 217a and through holes 218a are exemplified, 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 390 is mounted on the outlet 210b, the blocked cover surface 218b of the moving plate 218 blocks all the exposed holes 217a of the fixed plate 217, so that 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 390 is mounted on 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 drive motor 399 for driving the supply pipe 390, when the conveying screw 395 having only a blade formed in the form of a shaft free of the supply pipe 390 rotates (395r), the solidified material in the powder state 97 passes 53 through the open/close cover in an open state, and waits for the solidified material in the powder state from the solidified material chamber 210 to the receiving chamber 310 of the modified soil feeder 300 through the supply pipe 390 It is possible to transfer 54 in a state in which there is no leakage.

Although not shown in the drawing, the opening and closing devices 217 and 218 shown in FIGS. 5 and 8 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 390 is used in the process of transporting to the receiving chamber 310 .

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 of a material capable of bending deformation or a 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 transporter 200. . Moreover, 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, only when the transfer of the solidification material 97 is required, the unfixed end may be coupled to the other one of the outlet 130 of the silo 100 and the inlet 210a of the solidification chamber 210 .

Similarly, as shown in Figs. 6 to 8, the supply pipe 390 has one end 391 coupled to the outlet 210b of the solidification chamber 210, and the other end 392 has a receiving chamber ( It is coupled to the inlet 310a of the 310 and supplies 54 to the modified soil feeder 300 from the solidifying material 97 in a powder state from the solidifying material carrier 200 .

Here, the supply pipe 390 may be formed of a material such as metal, but according to a preferred embodiment of the present invention, the supply pipe 390 is formed of a material capable of bending deformation or the supply tube 394 of a flexible material. A conveying screw 395 that is formed in a blade shape without a main shaft and continuously conveys the solidified material 97 as a powder while rotating (395r) by a conveying motor 399 is disposed inside the supply tube 394 do.

Accordingly, in a state in which both ends 391 and 392 of the supply pipe 390 are connected to the outlet 210b of the solidification chamber 210 and the inlet 310a of the accommodation chamber 310, respectively, of the supply motor 399 When the conveying screw 395 rotates (395r) by rotation, the solidified material inside the solidified material chamber 210 is transferred to the receiving chamber 310. It becomes possible to supply Moreover, as the supply tube 394 is formed of a material that can be bent and deformed, the relative position of the movable solidified material carrier 200 and the modified soil feeder 300 that supplies the modified soil to the soft ground 60 while moving is reduced. Even if it fluctuates to some extent, it becomes possible to transfer 54 the solidified material in the powder state from the solidified material chamber 210 to the receiving chamber 310 through the bendable and deformable supply pipe 390 .

Therefore, since the improved soil feeder 300 does not have to stop in order to receive the solidification material, while the modified soil feeder 300 is supplying the modified soil 99 to the soft ground 60 , the supply pipe 390 ), the solidified material may be supplied from the solidified material transporter 200 to the modified soil feeder 300 . Through this, by supplying the solidifying material 97 in powder form from the solidifying material carrier 200 to the modified soil supply unit 300 through the flexible supply pipe 390, the surface layer solidification operation is performed while the modified soil supply unit 300 moves. It is possible to supply the solidification material 97 from the solidification material carrier 200 without leakage even during the continuous process, thereby continuously continuing the surface layer solidification process of the soft ground 60, thereby increasing process efficiency.

On the other hand, the supply pipe 390 is separated independently, and if necessary, one end 391 and the other end 392 are connected to the outlet 210b of the solidification chamber 210 and the inlet 310a of the receiving chamber 310 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 390 is fixed to any one of the outlet 210b of the solidification chamber 210 and the inlet 310a of the receiving chamber 310 . It may be installed and coupled to the other of the outlet 210b of the solidification chamber 210 and the inlet 310a of the accommodation chamber 310 with the unfixed end only when the transfer of the solidification material 97 is required. have.

The modified soil transporter 200 includes a sealed accommodation chamber 310 that receives and accommodates the solidification material 97 accommodated in the silo 100 from the solidification material transporter 200, and distributes the load applied to the ground. A caterpillar-type wheel 320 including parts that wrap around a number of wheels, such as a tank, so that it can move on its own while doing so, and a raw sand receiving part for receiving and accommodating raw sand 98 of soft ground from the excavator 400 ( 330), a stirring unit 340 that mixes raw soil 98 and solidifying material 97 to produce improved soil, and the modified soil 99 generated in the stirring unit 340 is used as a soft ground 60 The modified soil supply unit 350 for supplying, and the liquid supply unit 360 for supplying the liquid 88 for accelerating solidification to the modified soil 99 supplied to the soft ground 60 by the modified soil supply unit 350 is comprised of

The receiving chamber 310 receives the supply 54 of the solidifying material 97 through the inlet 310a in a closed state with the outside air as described above, and the amount according to the amount of the modified soil 99 produced is gradually reduced through the outlet 310b. ) is supplied (58) to the stirring unit 340 through the.

Although not shown in the drawing, an opening/closing unit for controlling the degree of opening according to the height of the solidification material 97 accommodated in the accommodation chamber 310 may be provided at the outlet 310b. Similar to the above-described silo 100 and solidification chamber 210 , an inclined region whose cross section gradually decreases toward the bottom may be provided in the lower portion of the accommodating chamber 310 .

The raw sand receiving part 330 continuously receives and accommodates the raw sand 98 of the soft ground 60 to be improved by the excavator 400 . The raw sand 98 accommodated in the raw sand receiving part 330 is supplied 56 to the stirring unit 340 by the movement 331 of the conveyor belt.

Here, the solidification material 97 discharged 58 through the outlet 310b of the receiving chamber 310 and the raw soil 98 discharged from the raw soil receiving part 330 are in a predetermined ratio in a stirring unit ( 340) is put in. To this end, a limiting member 333 for limiting the upper height of the conveyor belt may be provided so as to constantly maintain the supply amount per unit time to the stirring unit 340 by the conveyor belt.

Raw soil contains moisture and hardly spreads to the atmosphere by wind, etc., and even in the case of sandy soil, the size and weight of the particles are larger and heavier than the solidified material 97, so even if it spreads to the atmosphere, it does not cause air pollution. .

The stirring unit 340 is provided with a rotating shaft 341 equipped with a mixing blade 342 in the stirring chamber 340c, and the solidification material 97 and the raw soil sand ( 98) is supplied, and the solidification material 97 and the raw soil 98 are mixed with the rotating mixing blade 342 until discharged to the outlet located on the other side of the stirring chamber 340c, while moving toward the other side.

Accordingly, as shown in FIG. 2, when the solidification material 97 and the raw soil 98 are discharged to the outlet of the stirring chamber 340c, the modified soil 99 is mixed and combined in a homogeneous state equal to or greater than the reference value. do. In particular, since most of the soft ground is soil with a high water content, the solidified material 97 and the raw soil 98 maintain a solid bonding state.

The modified soil supply unit 350 includes a conveyor and supplies 59 the modified soil 99 discharged from the outlet of the stirring unit 340 to a predetermined position of the soft ground. Although the drawing is shown in the form of pouring the modified soil 99 at one location for convenience, the modified soil feeder 300 can evenly supply the soft ground by a predetermined amount while moving during the production and supply process of the modified soil 99. have.

Since the modified soil 99 is homogeneously mixed with the raw soil 98 with a high water content, even when the modified soil 99 is supplied in the form of a conveyor, the fine powder solidified material contained in the modified soil 99 is blown away by the wind. Does not pollute the air.

On the other hand, when the raw soil of the soft ground 60 is sandy soil with a low water content, a part of the modified soil 99 is blown by the wind and may pollute the surrounding air. In other words, as described above, the silo 100, the transfer pipe 190, the solidified material chamber 210, the supply pipe 390, and the receiving chamber 310 in the process of storing, transferring, and supplying the solidified material 97. Even though all of them are sealed in the , and the scattering of the solidified material 97 is blocked, the water content of the raw soil 98 is low during the production of the modified soil in which the solidified material 97 and the raw soil 98 are mixed in the modified soil feeder 300 . If the modified soil 99 is discharged and supplied to the soft ground 60 before the solidified material sufficiently absorbs or reacts to the moisture of the soil, there is still a possibility that the solidified material 97 is scattered by the wind.

Accordingly, the liquid supply unit 360 for spraying and supplying the liquid 88 to the modified soil 99 discharged from the outlet of the stirring unit 340 may be provided. In the drawing, as soon as the solidifying material 97 and the raw soil 98 are mixed and transferred from the outlet of the stirring unit 340 to the modified soil supply unit 350 in the form of a conveyor, the modified soil 99 from the liquid supply unit 360 Although the configuration in which the liquid 88 is sprayed is illustrated, according to a preferred embodiment of the present invention, the liquid supply unit 360 is the liquid 88 to the modified soil 99 being discharged from the outlet of the stirring unit 340 . It can be configured to spray.

Here, the liquid 88 may be water. Through this, the scattering of the solidified material can be prevented by spraying water on the improved soil 99 in which the sandy soil is mixed with the solidifying material to increase the water content.

More preferably, the liquid 88 supplied from the liquid supply unit 360 includes a liquid solidifying material including any one of a polymer and an enzyme 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 88 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 even if a small amount is supplied, the fine powder It is possible to more effectively prevent the spread of fire. 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 solidified 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 the spindleless screw.

Since the amount of solidification material 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 where the surface solidification process is performed, but in some cases, it may be disposed on the soft ground 60 where the surface layer 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 carrier 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 carrier 200 with respect to the silo 100, the solidified material 97 in powder form is transferred to the solidification chamber 210 through the transfer pipe 190 without any setback and leakage to the outside air. It can be transported 51 and mounted on the solid fire carrier 200 .

According to an 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 solid fire 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 material 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 solidification chamber 210 that accommodates 3.75 tons of solidified material at a time, and transports and supplies the solidified material to the modified soil feeder 300 twice per hour. do. Therefore, if two solidified material carriers 200 are used, 15 tons of solidified material per hour can be supplied to the modified soil feeder 300 .

Step 3 : Then, the solidified material carrier 200 is filled with the solidified material in the closed solidified material chamber 210, and the modified soil feeder is supplying the modified soil 99 while moving on its own in the soft ground 60 ( By moving (71) to the position of 300), the solidified material 97 is transported to the modified soil feeder 300 for producing the modified soil 99 (S130).

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

Step 4 : Then, as shown in FIG. 6 , the solidification chamber 210 and the receiving chamber 310 are connected with a supply pipe 390, and the sealed state is established through the supply pipe 390 blocked from outside air. and supply 54 of the solidifying material 97 in the powder state to the receiving chamber 310 of the modified soil feeder 300 .

According to an embodiment of the present invention, the other end 392 of the supply pipe 390 is fixed to the inlet 310a of the receiving chamber 310 , and the solidified material carrier 200 moves on the soft ground 60 . to reach the modified soil feeder 300, one end 391 of the supply pipe 390 is coupled to the outlet 210b of the solidification chamber 210, and then the solidification material 97 is inserted into the solidification chamber 210. It is supplied from the receiving chamber (310).

In this case, in the process of inserting and coupling one end 391 of the supply pipe 390 to the outlet 210b of the solidification chamber 210, the solidification material may leak and contaminate the surrounding atmosphere. Therefore, before inserting the one end 391 of the supply pipe 390, the opening/closing covers 217 and 218 installed at the outlet 210b of the solidification chamber 210 are placed in a closed state, so that the supply pipe 390 is closed. It fundamentally prevents the leakage of solidified materials during the combined installation process.

At this time, when the operator of the modified soil supply 300 or the operator of the excavator 400 puts the solidification material 97 into the receiving chamber 310 of the modified soil supply 300 , the supply pipe 390 is Since it is fixed to the upper inlet 310a of the accommodating chamber 310, it is not necessary to pay attention to the inputting process of the solidified material, and it is sufficient to only care about the worker transporting and supplying the solidified material. In this way, since the operator of the modified soil supplying machine 300, the operator of the excavator 400, and the operator of the solid fire transporter 200 are separated from each other and proceed with individual operations, focus on their respective roles to reduce errors and work safety can have the advantage of obtaining

And, when one end 391 of the supply pipe 390 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, and the exposed holes 217a of each plate are placed in an open state. ) and the path 53 passing through the through hole 218a so that the solidification material 97 can be transferred from the solidification chamber 210 to the supply pipe 390 .

The supply pipe 390 may be formed of a hard material such as metal. According to a preferred embodiment of the present invention, the supply pipe 390 connecting the solidification chamber 210 and the accommodating chamber 310 includes a flexible supply tube 394 capable of bending and deformation, and rotatably installed therein. It may be formed of a spindleless conveying screw 395 . Accordingly, in a state in which the supply pipe 390 connects the solidification chamber 210 and the receiving chamber 310, while the modified soil feeder 300 is moving while working, the supply pipe ( Even if a deviation in the movement speed and movement distance of the modified soil feeder 300 and the solidified material carrier 200 is generated by 390), the deviation is accommodated by the supply pipe 390 in which bending deformation is allowed, so the modified soil feeder 300 can obtain an advantageous effect of continuously generating and continuously supplying the modified soil 99 without stopping the operation. Through this, it is possible to further improve the efficiency of the improvement process of the soft ground.

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 reach the modified soil feeder 300 across and 12 minutes to supply the solidified material in powder form accommodated in the solidification chamber 210 to the receiving chamber 310 of the modified soil feeder 300 . It took a total of 25 minutes.

Step 5 : As shown in FIG. 6 , while step 4 is performed, the excavator 400 picks up the raw sand 98 of the soft ground 60 and collects the raw sand receiving part 330 of the improved soil feeder 300 . ) is supplied (S150).

For example, since the excavator 400 can ^{supply 50 m 3} of raw sand 98 per hour to the modified soil feeder 300, two excavators are used to transfer 100 m ³ of raw sand 98 per hour to the modified soil feeder ( 300) can be continuously supplied.

Step 6 : During the process in which steps 4 and 5 are performed, or in the state in which steps 4 and 5 are performed, the modified soil feeder 300 feeds the raw soil sand 98 and the solidified material 97 to the stirring unit 340 . The raw soil 98 and the solidifying material 97 are mixed and combined to produce the modified soil 99 by input in a predetermined ratio. In addition, the modified soil supplier 300 supplies the modified soil 99 generated while moving the soft ground 60 ( S160 ).

At this time, the amount of solidifying material to be mixed may vary depending on the water content and soil quality of the original soil, and since it should be mixed homogeneously, the feeding speed (rotation speed) of the stirring unit 340 is adjusted, and the solidification material is input (97) An electronic control device may be provided in the stirring unit 340 so as to be able to mix and match the raw soil 98 at a fixed rate.

On the other hand, when the raw soil 98 of the ground is sandy soil with a low water content, the liquid 88 may be sprayed from the liquid supply unit 360 to the generated modified soil 99 discharged through the outlet of the stirring unit 340 . .

Here, the liquid 88 may be water or a liquid containing a polymer or an enzyme. By supplying the liquid to 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 is blown to the atmosphere by wind or the like. contamination can be prevented.

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.

Step 7 : When the modified soil 99 is supplied to the soft ground 60 by the modified soil feeder 300 , the dozer 500 pushes the modified soil 99 to uniformly disperse it ( S170 ).

Step 8 : Then, by compacting the uniformly dispersed modified soil 88 with the compaction roller 600, the pozzolan reaction occurs and the solidifying material 97 and the raw soil 98 are chemically integrated, It improves the bearing capacity of soft ground.

As described above, the modified soil feeder 300 works while moving by itself in a self-propelled manner, and it is possible to supply the solidified material 97 while the modified soil 99 is produced, so it is very efficient.

The surface layer solidification method (S100) of the soft ground according to the present invention configured as described above is a closed chamber (100, 210, 310) and a sealed pipe (190, 390) from the silo (100) to the modified soil supply unit (300) Since the solidifying material 97 in powder form is supplied through the , it is possible to obtain an advantageous effect of improving the working environment by preventing the scattering of the solidifying material.

In addition, since the present invention does not use sacks, no waste is generated, and the cost of sacks and packaging and transportation costs can be reduced, thereby reducing 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 the above, preferred embodiments of the present invention have been exemplarily described, but the scope of the present invention is not limited 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: modified soil feeder
310: receiving chamber 320: caterpillar wheel
330: Wontosa receiving part 340: stirring unit
350: improved soil supply unit 360: liquid supply unit
390: supply pipe 394: flexible supply tube
395: spindleless feed blade 400: excavator
500: compaction roller 600: dozer
97: high fire 98: Wontosa
99: improved soil

Claims (14)

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 solidified material transport step of moving the solidified fire transporter to the modified soil supply unit located on the soft ground;
an opening/closing cover operation step of removably coupling a supply pipe to the outlet in a state in which the opening/closing cover of the outlet located at the lower side of the solidification chamber of the solidification material carrier is closed, and then opening the opening/closing cover;
After the opening/closing cover operation step is performed, the solidified material is supplied through the supply pipe coupled to the outlet to supply the solidified material accommodated in the solidified material to the sealed accommodation chamber provided in the modified soil feeder. step;
a raw soil supply step of supplying the raw soil of the soft ground to the raw soil receiving part provided in the modified soil supplying machine;
an improved soil supply step of mixing the raw soil sand and the solidifying material to produce improved soil, and supplying the modified soil produced while moving the soft ground to the modified soil supplying machine;
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.
The method of claim 1,
a liquid supply step of supplying a liquid to the modified soil supplied to the soft ground from the modified soil supplier;
The surface layer solidification method of the soft ground, characterized in that it further comprises.
3. The method of claim 2,
The liquid is an acrylic polymer, a styrene-butadiene emulsion, a styrene-butadiene-latex emulsion, and a surface layer solidification method of a soft ground, characterized in that it contains any one liquid solidifying material among enzymes.
As a device used in the surface layer solidification method of soft ground,
a silo for accommodating the solidified material in powder form;
The accommodating chamber for receiving and accommodating the solidification material accommodated in the silo is accommodated in a closed state, and the raw soil of the soft ground to be reformed and the solidified material supplied from the accommodating chamber are stirred to fill the improved soil produced. A modified soil feeder for supplying the desired ground;
a solidification material carrier having a solidification chamber in a closed state to be filled by receiving the solidification material from the silo, and moving on a caterpillar-type wheel to supply the solidification material filled in the solidification chamber to the accommodation chamber;
A supply tube capable of bending deformation, and a spindleless transport screw for transporting the solidification material in the supply tube, is detachably coupled to at least one of the solidification material carrier and the modified soil supply machine, the solidification material a supply pipe for supplying the solidified material filled in the solidified fire chamber to the accommodation chamber without leaking to the outside air while the chamber and the accommodation chamber are connected;
an opening/closing cover operably provided at the outlet located below the solidification chamber to which the supply pipe is coupled to prevent the outflow of the solidification material;
a compaction roller for compacting the modified soil supplied from the modified soil feeder;
Surface layer solidification device of soft ground, characterized in that it comprises.
According to claim 4, wherein the cover,
a fixing plate having an exposed hole formed therein and fixed to the lower side of the solidification chamber;
a moving plate having a through hole formed in the cover surface and sliding with respect to the fixed plate to reciprocate between a closed position in which the cover surface blocks the exposed hole and an open position in which the through hole and the exposed hole are partially aligned;
Surface layer solidification device of the soft ground, characterized in that it comprises.
As a device used in the surface layer solidification method of soft ground,
a silo for accommodating the solidified material in powder form;
The accommodating chamber for receiving and accommodating the solidification material accommodated in the silo is accommodated in a closed state, and the raw soil of the soft ground to be reformed and the solidified material supplied from the accommodating chamber are stirred to fill the improved soil produced. A modified soil feeder for supplying the desired ground;
a solidification material carrier having a solidification chamber in a closed state to be filled by receiving the solidification material from the silo, and moving on a caterpillar-type wheel to supply the solidification material filled in the solidification chamber to the accommodation chamber;
A supply tube capable of bending deformation and a spindleless transport screw for transporting the solidification material in the supply tube are provided, and the solidification material chamber and the accommodation chamber are connected to remove the solidification material filled in the solidification material chamber. a supply pipe for supplying the accommodating chamber so as not to leak to outside air;
a compaction roller for compacting the modified soil supplied from the modified soil feeder;
and, while the modified soil feeder moves or supplies the modified soil, the solidification material is supplied from the solidification material carrier to the modified soil feeder through the supply pipe.
As a device used in the surface layer solidification method of soft ground,
a silo for accommodating the solidified material in powder form;
The accommodating chamber for receiving and accommodating the solidification material accommodated in the silo is accommodated in a closed state, and the raw soil of the soft ground to be reformed and the solidified material supplied from the accommodating chamber are stirred to fill the improved soil produced. A modified soil feeder for supplying the desired ground;
It includes a solidification chamber in a closed state that is provided with an inclined region in the lower part of which the accommodation width is gradually narrowed and is filled by receiving the solidification material from the silo, and moves on the soft ground with a wheel in the form of a caterpillar to move the a solidified fire carrier for supplying the solidified material filled in the fire chamber to the accommodating chamber;
a supply pipe connecting the solidification chamber and the accommodating chamber to supply the solidified material filled in the solidification chamber to the accommodating chamber so as not to leak to the outside air;
A rotary shaft driven to rotate, a first transfer blade coupled in a first spiral direction to a first area from the center to one end of the rotary shaft, and a second area from the center to the other end of the rotary shaft in a direction opposite to the first spiral direction a dispersion for dispersing the solidification material in a horizontal direction in the interior of the solidification chamber by including a second transfer blade coupled to the rotation shaft, the rotation shaft being rotatably disposed at a height between the middle height and the upper end of the solidification chamber unit;
a compaction roller for compacting the modified soil supplied from the modified soil feeder;
Surface layer solidification device of soft ground, characterized in that it comprises.
8. The method according to any one of claims 4 to 7,
a liquid supply unit for supplying a liquid to the modified soil supplied to the soft ground from the modified soil supply unit;
Surface layer solidification device of the soft ground, characterized in that it further comprises.
9. The method of claim 8,
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.


delete delete delete delete delete

Images