KR102319909B1 - Directional press-in method with enhanced digging power - Google Patents

Abstract

A directional press-in method with enhanced digging power according to the present invention comprises: a first step of forming an entrance hole by excavating a predetermined part of the ground to a certain depth and installing an excavation device including an excavator at a fore-end at the side of the entrance hole; a second step of forming an excavation hole into the ground by the excavator while spraying an excavation composition including abrasive and water into the excavation hole using a spray means mounted on the excavator; and a third step of separating the excavator from the fore-end of the excavation device and combining a reamer to expand the excavation hole, wherein the abrasive includes at least one among sodium bicarbonate, corn cob, and quatz sand. According to the directional press-in method with enhanced digging power according to the present invention, an environmentally friendly abrasive base including sodium bicarbonate, corn cob, and quatz sand is mixed with an abrasive enhancer including garnet powder to perform wet abrasion, thereby enhancing digging power in an environmentally friendly manner.

Description

Directional press-in method with enhanced digging power

The present invention relates to a directional indentation method with enhanced digging force, and more particularly, to a directional indentation method for enhancing digging force by spraying an excavation composition including water and abrasives into an excavation hole in an excavation step through an excavator.

The directional horizontal excavation, that is, the HDD (Horizontal Directional Drilling) method, refers to a method of burying a pipe without excavating the ground surface, which is also called a directional press-in method.

This method is a method of excavating underground without causing destruction or deformation of the upper structure during pipeline construction and underground facility construction. It is a process that compensates for problems such as traffic congestion and waste of resources due to the opening and closing.

Whether this directional indentation method can provide an excavation process with excellent digging power, whether the excavation hole can accurately reach the target when the excavation hole has a long distance, and whether the sludge accumulated in the drill hole can be efficiently removed. It can be said that it is an important factor in determining an efficient process.

Korean Patent No. 10-2080788, a directional drilling device using a water hammer unit and a directional press-in method using the same, is disclosed as providing the advantage of simultaneously performing directional and straight-line drilling by applying a water hammer unit in the excavation process.

In this way, using a water hammer unit or a water jet can provide excellent digging power with strong water pressure along with the excavation power of the bit, but in addition to physical water pressure, chemical A solution for phosphor polishing needs to be additionally required.

Therefore, in addition to the excavation process such as water jet, there is a need to develop a new and advanced directional indentation method that can provide better digging force by spraying an excavation composition including an additional abrasive to water, which is the basis of water pressure.

The present invention has been devised to overcome the problems of the above technology, and is a directional indentation method in which an abrasive, which is environmentally friendly and capable of providing a fast excavation speed, is mixed with water and sprayed with an excavation composition produced in the excavation step to strengthen the excavation force Its main purpose is to provide

Another object of the present invention is to improve the abrasive performance of the abrasive and to prevent the abrasive particles from being destroyed during spraying.

Another object of the present invention is to prevent agglomeration of the granular component contained in the abrasive.

It is a further object of the present invention to agglomerate the sludge to increase the recovery rate.

A further object of the present invention is to increase the convenience of agglomeration by controlling the diameter of the agglomerates generated by agglomeration in the flocculation of sludge.

In order to achieve the above object, the directional press-in method with enhanced excavation force according to the present invention forms an entry hole by excavating a predetermined portion of the ground surface to a certain depth, and an excavator equipped with an excavator at the tip of the entry hole The first step of installing on the side; a second step of forming an excavation hole into the underground through the excavator while spraying the excavation composition including an abrasive and water by the spraying means mounted on the excavator; A third step of separating the excavator from the tip of the excavator and then coupling the reamer to expand the excavation hole; including, wherein the abrasive is sodium bicarbonate and, corn cob and It is characterized in that it comprises at least one of quartz sand (quatz sand).

In addition, the excavator, characterized in that it includes at least one of a water hammer unit and a water jet for spraying the excavation composition to the excavation hole.

In addition, the abrasive includes 30 to 50 parts by weight of an abrasive base including sodium bicarbonate and at least one of corn cob and quartz sand, and garnet powder. 5 to 15 parts by weight of an abrasive enhancer including, and 35 to 65 parts by weight of water.

According to the directional press-in method with enhanced excavation force according to the present invention,

1) By mixing an abrasive reinforcing agent containing garnet powder with an eco-friendly abrasive base containing sodium bicarbonate, concove, and quartz sand to perform wet grinding, it is environmentally friendly and has the advantage of strengthening the digging power,

2) The composition of an abrasive enhancer coated with a resin-based abrasive on the surface of the garnet powder improves polishing performance and prevents particle destruction due to mutual collision of abrasives during water jet spraying.

3) By strengthening the miscibility of the granular and liquid components contained in the abrasive enhancer, it not only prevents agglomeration of the granular abrasive when sprayed by the waterjet method, but also

4) As the sludge recovery agent is sprayed and sucked into the sludge generated during the excavation process, the sludge can be efficiently aggregated and recovered, but the diameter of the aggregated aggregate can be adjusted so that the sludge does not have an excessively large volume. to increase efficiency,

5) It provides the effect of controlling the viscosity of the colloidal dispersion formed by dispersing bentonite contained in the sludge recovery agent in water and enhancing the function of adjusting the diameter of aggregates.

1 is a conceptual diagram showing a schematic process of the directional press-in method of the present invention.
Figure 2 is a flow chart of the directional indentation method of the present invention.
Figure 3 is a flow chart showing the steps of manufacturing an abrasive enhancer.
4 is a flow chart showing the steps of preparing a physical property improving agent.
Figure 5 is a flow chart showing the steps for preparing the stabilizer.
6 is a flow chart showing the steps of preparing a dispersibility enhancer.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numbers in each drawing refer to like elements.

Figure 1 is a conceptual diagram showing a schematic process of the directional indentation method of the present invention, Figure 2 is a flowchart of the directional indentation method of the present invention.

As can be seen from FIGS. 1 and 2 , especially FIG. 2 , the directional press-in method of the present invention basically includes three steps.

The directional press-in method of the present invention can be applied to form the excavation hole 30 of various diameters in a state having a certain length in a general terrain.

This directional press-in method is not shown in the drawings, including a unidirectional horizontal excavation process as shown in FIG. 1 , but it is also possible to include a bidirectional excavation process.

In particular, the method of the present invention does not depend on the physical excavation force of a known excavator, and in terms of providing a method using an abrasive to be described later as a main feature, a smaller diameter than the known tunnel-like excavation hole 30 However, it is better to apply it to a subsea environment (such as burying a long pipe or other structure in the seabed) where excavation/press-fitting of the excavation hole 30 with a length of several km or more than a dozen km or more is required instead. desirable.

Hereinafter, each step of the present invention will be described according to the process sequence of FIG. 2 .

(S1) First step of installing an excavator after forming an access hole

First, in the directional press-in method of the present invention, the area in which the excavation hole 30 is to be formed, that is, an obstacle is investigated and planned, as well as pre-preparation steps such as surveying and linear determination, and then the pipe 60 or other structures. The entry hole 10 is formed by excavating the ground surface (or the seabed) to be buried (hereinafter, in the present invention, such excavation is also referred to as 'press-in').

At this time, when the obstacle is the ground, it is possible to form not only the entry hole 10 but also the arrival hole 20, and when the later press-fitting method is completed, an error is severely generated in the position of the target reaching hole 20 In order to prevent this, these reaching holes 20 are formed spaced apart from the entry holes 10 at intervals corresponding to the total length of the above-described pipe 60 or other structures.

When the entry hole 10 is formed, the operation of installing the excavator 100 having an excavator at the tip near the entry hole 10 is performed.

After that, a drill pipe 40 having an excavation blade (excavation blade) attached to the entry hole 10 or an excavator 100 capable of mounting an excavator is installed through a known installation means, and then the excavator is driven By continuously pushing the drill pipe 40 into the ground, the excavation hole 30 is formed in the direction from the entry hole 10 to the arrival hole 20 . At this time, the drill pipe 40 is not necessarily a necessary means, and it is also possible to form the excavation hole 30 only by the excavation process of an excavator without such a drill pipe 40 as will be described later.

The excavator 100 of the present invention is equipped with an excavator such as a head having a bit or a water hammer unit to be described later through the drill pipe 40 as described above or without the drill pipe 40 at the tip of the tip, thereby performing a basic excavation process. As a capable device, it is possible that this excavator further comprises injection means, which will be described later.

In addition, the excavator 100 is based on a state in which the excavator can be detachably coupled to the excavator 100 in addition to the excavator 50 is coupled to the front end of the excavator 100 as well as the side end around the front end in addition to the front end. It is also possible to install a spray module or an inhaler capable of spraying a specific composition or inhaling vomit or the like. A detailed device for this will be described again in a step to be described later.

In summary, the first step of the present invention consists of a known entry hole 10 / reaching hole 20 forming process, and a step of installing an excavator 100 having a known excavation function, which is a well-known It can be said that the process of forming the entry hole and the like and the installation process of the excavator are the same.

(S2) A second step of forming an excavation hole accompanied by a spraying process of the excavation composition

The second step of the present invention is the step of forming the excavation hole 30 into the underground through the excavator while spraying the excavation composition including the abrasive and water to the excavation hole 30 by the spraying means mounted on the excavator, that is, the excavation process means

As mentioned briefly above, the excavator of the present invention may include the above-described drill pipe 40 or may have various structures such as a bit head, a water hammer unit, and a water jet.

Among them, a water hammer unit as an excavator of the present invention will be described as an example.

In general, hammer devices include an air hammer using pneumatic pressure and a water hammer using water pressure. Air hammers have a problem in that it is difficult to drill a relatively deep excavation hole. When discharging the sludge mixed with water along with the earth and sand generated in the excavation process, it has the advantage of discharging rock fragments and the like at the same time.

The water hammer unit refers to a water hammer using water pressure as described above, and although not shown in the drawings, a pipe-shaped body in which a plurality of bits providing striking force during excavation are rotatably installed via a rotating shaft, and inside the body It may include a tank storing water, a pump for pumping water stored in the tank, and a nozzle for spraying water pumped by the pump to the front end of the body.

The above-described water hammer unit describes a known basic structure, and the water hammer unit of the present invention has an additional structure such as an excavation angle adjustment means, water pressure/water quantity adjustment means, and injection timing control means in a state based on this structure. Can be additionally included, it is possible to be coupled via a rod capable of moving forward via the motor to the tip of the excavator.

This water hammer unit forms an excavation hole 30 inside the underground while moving forward in the entry hole 10 by the advancement of the rod and the rotation of the rotation shaft, while the bit strikes the underground rock, and at the same time toward the bore 30 It is possible to pursue the ease of discharging sludge including soil and rock fragments as well as providing excellent excavation power by the sprayed water pressure.

The present invention provides an excavation composition including an abrasive in addition to the water providing such a hydraulic pressure, and provides water pressure necessary for basic excavation through the water of the excavation composition, and provides better excavation with abrasive function of rock or soil by abrasives Its main feature is to provide power.

At this time, when the excavator of the present invention is not a water hammer unit, it is also possible to apply an excavator including a spray function capable of spraying the excavation composition, so the excavator of the present invention does not necessarily consist of a water hammer unit, but basic water spray Applying a water hammer unit equipped with a function is more preferable for economic reasons that do not require a separate injection device.

This water hammer unit is detachable from the tip of the excavator 100 , so that the reamer 50 can be coupled to the tip of the separated excavator 100 . The separable structure of the water hammer unit may refer to a known structure in which the above-described coupling structure with the rod is designed in a detachable manner.

The abrasive of the present invention is included with water in the tank of the water hammer unit described above, or it is also possible to configure so that the abrasive is sprayed together when water is sprayed from the excavator through a separate supply pipe connected to the excavator.

By using such abrasive, it is possible to provide more excellent digging power by reinforcing chemical digging force to the physical digging force such as bit and hydraulic pressure, and the specific composition of the abrasive will be described later.

(S3) The third step of excavating the excavation hole

As described above, the drill pipe 40 or the water hammer unit (or water jet) with the excavation blade (excavation blade) attached to the entry hole 10 side is operated, that is, the drill pipe 40 is continuously pushed into the ground or water When the excavation hole 30 is formed in the direction from the entry hole 10 to the arrival hole 20 by performing a continuous excavation process through the hammer unit, the excavator (drill pipe or water hammer unit) coupled to the tip of the excavator 100 ) is separated and then the reamer 50 is coupled.

Since the reamer 50 has the same structure as a known reamer, a description of a separate specific structure will be omitted.

The drilling hole 30 of a certain diameter is formed while the drilling hole 30 is drilled through the drilling machine 50, and the drilling hole 50 has a diameter enough to allow the pipe 60 or other structures to be introduced. When an excavation hole 30 having a size is formed, the pipe 60 is connected to the rear end of the reamer 50, and the reamer 50 is entered from the reach hole 20 using the excavator 100. The pipe 60 in the drilling hole 30 between the reaching hole 20 and the entry hole 10 by pulling in the direction of the ball 10 so that a pipe or other structure is drawn into the drilled hole 30 ) can be buried. Finally, when the reaching hole 20 and the entrance hole 10 are filled with a buried material such as earth and sand, the pipe (or other structure) laying operation is completed.

At this time, a grouting process may be performed on the excavation hole 30 , which will be described later.

Hereinafter, the composition of the abrasive for enhancing the digging force and the function thereof will be described in detail.

First, the abrasive of the present invention is based on including at least one of sodium bicarbonate and corn cob and quartz sand.

In the directional indentation method of the present invention, since excavation can be performed through a water hammer unit or a water jet as mentioned above, sodium bicarbonate used as a wet abrasive as an abrasive base as a base for an abrasive is basically included, Here, it would be most preferable to use a mixture of concove and quartz sand as an abrasive base. Here, there is no limitation on the mixing ratio of components of sodium bicarbonate, concove, and quartz sand that may constitute the polishing base.

Sodium bicarbonate is soluble in water, so it is mainly used for wet polishing and has the advantage of being environmentally friendly. In addition, it has the effect of increasing the excavation speed by exhibiting a fast working speed due to its excellent performance as an abrasive.

Corn cob is an eco-friendly material with moderate hardness, which is obtained by drying, compressing, and pulverizing the subsequent stems from which the corn fruit is harvested, and has a Mohs (MOHS) hardness of about 4.5. It has the advantage of being eco-friendly and inexpensive.

Quartz sand is a high-hardness material having a Mohs (MOHS) hardness of about 7.5, and has excellent performance as an abrasive and a very low price. Therefore, it has the advantage of being excellent in economical efficiency and excellent polishing performance.

At this time, the abrasive is mixed with the water of the water hammer unit or water jet as described above to form an excavation composition, and the excavation composition may be mixed with 80 to 95 parts by weight of water and 1 to 20 parts by weight of an abrasive, and the amount of the abrasive is based on water. It is possible to vary the weight according to the situation according to the density of rocks in the ground, and the distribution of rocks and soil.

In summary, the abrasive of the present invention is mixed with water to form an excavation composition, and more efficiently grind an excavation target (rock or soil, etc.) in the excavation process of an excavator, thereby increasing the excavation force as a result.

Furthermore, the above-described abrasive may further include an abrasive enhancer including garnet powder.

In this case, the abrasive includes 30 to 50 parts by weight of an abrasive base including at least one of sodium bicarbonate and corn cob and quartz sand, and an abrasive including garnet powder. 5 to 15 parts by weight of the reinforcing agent and 35 to 65 parts by weight of water are included as a basic embodiment.

Here, water is included in the abrasive, and this water can be understood as a separate concept from the water in the water hammer unit, that is, the mixing ratio of water and the abrasive can be adjusted in more detail according to adjusting the ratio of water in the abrasive.

Garnet powder is a material having a Mohs hardness of 7.5 to 8.0, and has excellent performance as an abrasive, so that the working speed is fast and economical efficiency is excellent compared to high hardness. Therefore, when it is added as an abrasive enhancer, the polishing efficiency can be maximized.

In other words, the polishing performance of the abrasive can be further improved by adding an abrasive enhancer including garnet powder to the abrasive base.

In order to prove the performance of the abrasive including such an abrasive enhancer, the evaluation results of Examples and Comparative Examples will be compared and described. Examples are composed of Examples 1 to 3, which are preferred examples including the composition of the abrasive of the present invention, and Comparative Examples 1 and 2 are known abrasives that do not contain the component of the abrasive of the present invention.

<Example 1>

20 g of sodium carbonate, 10 g of Concove, and 10 g of quartz sand were mixed to prepare 40 g of a polishing base. 40 g of the prepared abrasive base, 10 g of garnet powder, and 50 g of water were mixed to prepare 100 g of an abrasive.

<Example 2>

40 g of a polishing base was prepared by mixing 20 g of sodium carbonate and 20 g of Concove. 40 g of the prepared abrasive base, 10 g of garnet powder, and 50 g of water were mixed to prepare 100 g of an abrasive.

<Example 3>

20 g of sodium carbonate and 20 g of quartz sand were mixed to prepare 40 g of a polishing base. 40 g of the prepared abrasive base, 10 g of garnet powder, and 50 g of water were mixed to prepare 100 g of an abrasive.

<Control Example 1>

20 g of sodium carbonate, 10 g of Concove, and 10 g of quartz sand were mixed to prepare 40 g of a polishing base. 40 g of the prepared abrasive base and 60 g of water were mixed to prepare 100 g of an abrasive.

<Control Example 2>

40 g of sodium carbonate and 60 g of water were mixed to prepare 100 g of an abrasive.

A polishing test was performed with the prepared abrasives of Examples 1, 2, and 3 and Comparative Examples 1 and 2, respectively. Through the excavation process using the abrasive of the present invention, excavation and strictly cutting of a glass specimen having a width and length of 10 cm and a thickness of 5 mm were performed.

Examples 1, 2, 3 and Control Examples 1 and 2 of the present invention were sprayed on the above-mentioned specimens through a water jet or water hammer unit, and the time taken to cut the specimens, and the roughness of the cut sections were compared to the following table 1 is shown.

Comparison of polishing time and section finish for each abrasive material Example 1 Example 2 Example 3 Control Example 1 Control Example 2 Time
(s) 1.1 1.3 1.05 1.4 1.5 section roughness
(μm) 1.2 1.3 1.4 1.3 1.6

Looking at the results of Table 1 described above, it can be seen that the polishing time for the abrasives of Examples 1 to 3 of the present invention is shorter than that of the abrasives of Control Examples 1 and 2 of the present invention. That is, it can be confirmed that the abrasive of the present invention has superior polishing performance compared to known abrasives.

Furthermore, through the comparative treatment of Examples 1 and 2 of the present invention, when quartz sand is included as the polishing base, it can be confirmed that the cut cross-section becomes uniform and the required time is also shortened, that is, the polishing performance is improved.

Through the comparative treatment between Examples 2 and 3, the physical properties between the convo and the quartz sand added as abrasive bases can be compared. Although the polishing rate of the abrasive of Example 3 to which quartz sand was added was improved compared to the abrasive of Example 2 to which concove was added, it was confirmed that the roughness of the cross-section was increased, resulting in a relatively uneven cross-section.

However, in comparison between Examples 1, 2, and 3, the abrasive of Example 1 showed a more even cross-sectional roughness without a significant difference in the required time compared to Example 3, so that the abrasive of Example 1 had a required time and cross-section. It can be confirmed that the most excellent effect is obtained when the aspect of illuminance is considered.

In addition, through the comparative treatment between Example 1 and Control Example 1, it was possible to confirm the change in the required time and cross-sectional roughness according to whether or not garnet, which is an abrasive reinforcing agent, was included. Therefore, it can be confirmed that the time required for adding garnet is shortened, and the roughness of the cross section is low, indicating a more even cross section.

Furthermore, through the comparative treatment between Control Examples 1 and 2, it can be confirmed that the time required and the surface roughness improvement are improved by including the concove and quartz sand in the polishing base.

In summary, in the case of the abrasive of the present invention, it can be confirmed from the above test results that not only the polishing performance is superior to that of the known abrasive, but also the fast working speed and the surface uniformity are excellent.

Furthermore, it is said that the abrasive enhancer of the present invention includes garnet powder as described above. Here, the abrasive enhancer may include an additional composition as well as garnet powder as an active ingredient. This is explained as follows.

3 is a flowchart illustrating the steps of preparing an abrasive enhancer.

Referring to Figure 3, the polishing enhancer of the present invention, the step of preparing a first mixed solution (S11). It may be prepared through the step of preparing the second mixed solution (S12) and the step of completing the polishing enhancer (S13).

(S11) preparing a first mixed solution

First, 30 to 50 parts by weight of garnet powder, 15 to 30 parts by weight of urea, and 20 to 55 parts by weight of melamine resin are mixed to prepare a first mixed solution.

As described above, garnet powder is a material having a Mohs hardness of 7.5 to 8.0, and has excellent performance as an abrasive, a fast working speed, and excellent economic feasibility compared to high hardness.

Both urea and melamine resins can also be referred to as plastic media-based abrasives, and are medium-hardness abrasives that have fast working performance by themselves and have a value of about 3.5 to 4.0 based on Mohs hardness. Therefore, as it is added to the polishing enhancer, it has the effect of improving the polishing rate and improving the polishing performance itself.

Furthermore, since urea and melamine resin are mixed and used as a coating material for the surface of the garnet powder, even when the abrasive of the present invention is used for excavation, the surface of the garnet powder, which is an abrasive strengthening agent, is covered with urea and melamine resin to protect the particles. By minimizing damage to the powder particles, the abrasive enhancer including the garnet powder serves to control the particle size so that the abrasive enhancer has a uniform particle size.

(S12) preparing a second mixed solution

Then, 80 to 90 parts by weight of the above-described first mixture, 5 to 15 parts by weight of fused alumina, 1 to 5 parts by weight of aluminum monostearate, and ethylenediamine tetraacetic acid ( ethylenediamine tetraacetic acid) 1 to 5 parts by weight were mixed to prepare a second mixed solution.

Fused alumina is crystallized by melting alumina in an arc furnace, and is also called artificial gold steel. It has extremely hard properties due to its high brittleness and hardness, and has excellent economic feasibility. When added to the polishing enhancer of the present invention, it functions to improve polishing performance and increase polishing rate.

Aluminum monostearate is an aluminum compound of stearic acid and palmitic acid. By acting as an anti-caking agent and dispersing agent, various solid particles contained in the abrasive enhancer are added to prevent agglomeration, thereby preventing agglomeration or binding cake, and increasing dispersibility.

Ethylenediamine tetraacetic acid is a chelating agent that blocks the activity of metal ions, and serves as a dispersant for inorganic powder as well as preventing activity on trace metal ions that may be included on solid particles included in the polishing enhancer. is added to improve the mixability.

(S13) Step of completing the abrasive enhancer

Finally, 85 to 95 parts by weight of the second mixture, 1 to 5 parts by weight of tetraethylammonium hydroxide, and a vinyl acetate-butyl acrylate copolymer (Vinyl acetate-Butyl acrylate Copolymer) 1 to 10 parts by weight of the improving agent is mixed to complete the polishing enhancer.

Since tetraethylammonium hydroxide has excellent mutual repulsion, various components included in the polishing enhancer, particularly garnet powder and molten alumina, are added to form a stable dispersion without agglomeration or sinking in the mixed solution.

The physical property improver includes a vinyl acetate-butyl acrylate copolymer as an active ingredient, where the vinyl acetate-butyl acrylate copolymer is added as a physical property improver to improve the mechanical strength of the resin material included in the polishing enhancer, that is, urea and melamine resin. Not only can it be improved, but it also serves to improve adhesion between the liquid resin component including urea and melamine resin and the granular component including garnet powder and fused alumina when added.

The abrasive enhancer contains a liquid resin component. Preferably, after the abrasive enhancer is prepared, the abrasive enhancer in a stable dispersion is dried and pulverized to prepare the abrasive enhancer in the form of particles, and then it can be added to the abrasive. have.

Through the addition of the abrasive enhancer, it is possible to improve the polishing performance of the abrasive and to produce an abrasive having an even particle diameter, and to prevent agglomeration of granular components in a wet abrasive containing water to obtain a stable liquid state. Enables water jet spraying.

Furthermore, the above-described physical property improving agent may include an additional composition in addition to the vinyl acetate-butyl acrylate copolymer, and the physical property improving agent including the additional composition may be prepared as follows.

2 is a flowchart illustrating a step of preparing a physical property improving agent.

Referring to FIG. 2 , the physical property improving agent of the present invention is to be manufactured through a step of preparing a first solution (S21), a step of preparing a second solution (S22), and a step of completing the property improving agent (S23). can

(S21) preparing the first solution

First, 40 to 70 parts by weight of vinyl acetate-butyl acrylate copolymer and 20 to 40 parts by weight of polyvinyl alcohol and tetradecyl trimethyl ammonium bromide (Tetradecyl Trimethyl Ammonium Bromide) 5 to 15 parts by weight are mixed to prepare a first solution.

As described above, when the vinyl acetate-butyl acrylate copolymer is added as a physical property improver, it improves the mechanical strength of the resin material containing melamine resin and urea, thereby increasing the performance as an abrasive, and between the particle component and the resin component included in the abrasive enhancer. It has the effect of strengthening the adhesion.

Polyvinyl alcohol is added to serve as a solvent for the primary solution, and when added as a physical property improver, it helps to coat the resin-based components on the surface of garnet powder and molten alumina while increasing the mixability of various resin components included in the polishing enhancer. perform the function

Tetradecyl trimethyl ammonium bromide (Tetradecyl Trimethyl Ammonium Bromide) acts as a surfactant, and when a physical property improver is included, it has an effect of increasing the miscibility of various resin components included in the polishing enhancer.

(S22) preparing a secondary solution

Then, 80 to 90 parts by weight of the first solution, and 5 to 15 polylactide-polycyclohexene carbonate-polylactide (PLA-PCHC-PLA: poly(lactide)-poly(cyclohexene carbonate)-poly(lactide)) A second solution is prepared by mixing parts by weight and 3 to 10 parts by weight of sodium dodecyl sulfate.

Polylactide-polycyclohexenecarbonate-polylactide (PLA-PCHC-PLA) is a material that simultaneously functions as a thermoplastic elastomer and a reinforced plastic. It performs the function of increasing the mixing ability.

Sodium dodecyl sulfate is an anionic surfactant and is added to enhance the miscibility and dispersibility of various substances included in the secondary solution.

(S23) Step of completing the physical property improving agent

Finally, 85 to 98 parts by weight of the secondary solution, 1 to 10 parts by weight of furfuryl sulphide, and 1 to 10 parts by weight of 2-ethyl hexanol to complete a physical property improving agent .

Furfuryl sulfide is added to maximize the dispersion effect in the various dispersants and surfactants included in the above-described physical property improving material and polishing enhancer, and the anti-caking effect is maximized according to the addition of furfuryl sulfide.

2-Ethylhexanol is a substance added as a plasticizer. That is, the vinyl acetate-butyl acrylate copolymer, melamine resin, and urea contained in the physical property improver are coated on the surfaces of granular fused alumina and garnet powder to form a coatable abrasive film.

According to the addition of the physical property improving agent, the mechanical strength of the resin-based component included in the polishing enhancer is increased, and the mixing property of the granular component and the liquid-based resin component is increased, and further, the polishing properties can be further strengthened.

The directional press-fitting method of the present invention may include a step including a grouting step of injecting a filler into the excavation hole (inner wall) after the third step described above.

That is, in order to prevent the excavation hole 30 from collapsing or the occurrence of a phenomenon such as soil concentration, it may include a well-known grouting treatment (filler injection) in the drilled hole 30. It means that .

At this time, the filler injection (grouting treatment) process is to put a known injection tube made of a single tube such as a single packer, a rod, a strainer, or a multi tube such as a double packer into the excavation hole, and then insert the end of the injection tube into the inner wall of the hole. After fixing in this way, it is possible to inject the filler into the inner wall of the excavation hole through the injection tube by operating the injector connected to the injection tube, and since this is the same as the known grouting process, a separate detailed description will be omitted.

Here, the injection tube may be formed of a manjet tube, which is a composite tube that can be injected while mixing various materials as the filler to be described later is a composite composition.

In addition, it may include a step of curing when the filler is injected into the injection tube.

Curing means that after the filler is injected into the injection tube, it is protected so that it is sufficiently cured without being adversely affected by temperature change, impact, and load.

Usually, the curing stage means up to 28 days after pouring (of course, it may be shorter than this), and since it is difficult to judge the degree of hardening of the filler with the naked eye, it is preferable to set a sufficient curing period in consideration of the amount of the injected filler. .

Of course, it is also possible to specify the end time of the curing step by determining the degree of hardening of the filler through known non-destructive testing methods such as radiographic inspection, ultrasonic inspection, and acoustic emission inspection.

Additionally, the directional indentation method of the present invention may include a recovery step for sludge mixed with water, abrasives, and excavation residues during the excavation process.

Specifically, the directional press-in method of the present invention injects a sludge recovery agent into the excavation hole 30 drilled after the above-described third step through the injection module mounted on the excavation apparatus 100, and the drilled hole 30 It is possible to include; a coagulation step of coagulating the sludge of ) and a suction step of sucking the coagulated sludge through an aspirator mounted on an excavator.

Here, the injection module may be mounted on the excavator 100 itself or the reamer 50 separately from the injection means mounted on the excavator, and may include a tank storing the sludge recovery agent, a pump, and a nozzle, which It has the same or similar structure to the water jet or the above-described jetting means.

In addition, the inhaler can also be made of a compressor capable of sucking sludge in the state mounted on the excavator 100 itself or the reamer 50, which is for sludge recovery of the excavation hole in a known excavation process. Since it is the same as a general-purpose device, a detailed description of the structure and function will be omitted.

In particular, in the coagulation step of the present invention, the sludge recovery agent is sprayed to recover the sludge accumulated in the excavation hole, so that the sludge recovery agent is the excavation composition composed of the above-mentioned water and abrasive, as well as the sludge composed of excavation residues such as soil and rock fragments. It is characterized in that it is mixed and agglomerated.

At this time, the sludge recovery agent is preferably 40 to 70 parts by weight of water, 15 to 30 parts by weight of bentonite, and 1 to 10 parts by weight of a stabilizer including ammonium lauryl sulfate (ALS: Ammonium Lauryl Sulphate) It is possible to include .

Water is added to spray the sludge recovery agent in a water jet (or water hammer unit) method, and bentonite is a clay containing mainly montmorillonite, a mineral belonging to the monoclinic system with a mica-like crystal structure. It is added to coagulate this mixed sludge.

When bentonite is mixed with water, it is dispersed in water to form a colloidal dispersion exhibiting high structural viscosity. This colloidal dispersion is agglomerated together with the sludge to increase the recovery efficiency of the sludge.

However, in this case, when the size of the aggregated particles is too large, there may be difficulty in recovery, so a stabilizer including ammonium lauryl sulfate is added to control the size of the aggregated particles.

Ammonium lauryl sulfate is a type of surfactant, which improves mixing stability when mixing sludge and bentonite to maintain a colloidal state, and reduces the size of aggregates when agglomerates are formed due to agglomeration.

Therefore, as such a sludge recovery agent is sprayed through the spray module by a water jet method, etc., the sludge in which the excavation residues generated in the excavation process and the previously sprayed abrasive are mixed can be aggregated and recovered, but the agglomerated sludge is too much. It has a large volume so that the sludge collection efficiency can be maximized by allowing the diameter of the sludge to be adjusted to block the excavation hole or solve the problem of accumulation when the sludge is sucked through the suction machine.

Furthermore, in the case of the above-described stabilizer, an additional composition may be further included in addition to ammonium lauryl sulfate.

5 is a flowchart showing the steps of preparing a stabilizer.

5, the stabilizer of the present invention is characterized in that it is prepared through a step of preparing a first solution (S31), a step of preparing a second solution (S32), and a step of completing the stabilizer (S33). do it with

(S31) preparing a first solution

First, 20 to 40 parts by weight of Ammonium Lauryl Sulphate (ALS), 15 to 30 parts by weight of water, and 10 to 20 parts by weight of n-dodecyl mercaptan are mixed to prepare a first solution do.

As described above, ammonium lauryl sulfate is a type of surfactant, which improves mixing stability when mixing sludge and bentonite to maintain a colloidal state, and reduces the diameter of aggregates when aggregates are formed due to agglomeration. and water is added as a solvent of the first solution.

Normaldodecyl mercaptan has a surface activity function, so it increases the effect of maintaining the colloidal state and stabilizing the solution through ammonium lauryl sulfate, and further serves as a solvent for various components to dissolve some substances contained in the sludge. It has the role of a solvent that can

(S32) preparing a second solution

Then, 75 to 90 parts by weight of the first solution, 3 to 15 parts by weight of sodium dodecyl sulfate, and 5 to 20 parts by weight of lauryl alcohol ethoxylate, and polydimethyl A second solution is prepared by mixing 3 to 10 parts by weight of polydimethyl siloxane (PDMS).

Sodium dodecyl sulfate is an anionic surfactant, and is added to further enhance the surfactant function of ammonium lauryl sulfate and normaldodecyl mercaptan contained in the first solution.

As an emulsifier, lauryl alcohol ethoxylate serves to increase the miscibility of the components included in the stabilizer by assisting the role of various surfactants included in the stabilizer of the present invention, and at the same time enhance the effect of controlling the diameter of the aggregate. carry out

Polydimethylsiloxane is a kind of silicone-based antifoaming agent. It has the function of suppressing the foaming caused by ammonium lauryl sulfate and sodium dodecyl sulfate, which can be generated by surfactants in stabilizers containing various surfactant components. carry out That is, when the sludge recovery agent containing the stabilizer of the present invention is sprayed by a water jet method, it performs a function of suppressing the generation of bubbles.

(S33) step of completing the stabilizer

Finally, 85 to 95 parts by weight of the second solution, 1 to 5 parts by weight of oxalic acid dihydrate and 1 to 10 parts by weight of a dispersibility enhancer including propylene carbonate are mixed to form a stabilizer complete

Oxalic acid dihydrate is colorless needle-like crystals and is the simplest form of carboxylic acid. It is highly soluble in water and acts as a metal chelate sequestrant. Therefore, when it is added to a stabilizer and sprayed as a sludge recovery agent, it prevents precipitation and agglomeration by metal ions that may be contained in the sludge in a mixed state with the sludge, thereby increasing the effect of reducing the diameter of the aggregate and maintaining the colloidal state longer play a role in making

The dispersibility enhancer includes propylene carbonate as an active ingredient. Propylene carbonate serves as a solvent miscible with water and various solvents and at the same time reduces the viscosity of the mixed material. Mixing of various components added to the stabilizer It plays a role in increasing the property, and furthermore, by reducing the viscosity of the colloidal aqueous solution generated when bentonite is mixed with water, it increases the effect of reducing the diameter of the aggregate and enhances the dispersibility.

Therefore, in the case of the stabilizer having the above-described composition, it controls the viscosity of the colloidal dispersion formed by dispersing bentonite in water and at the same time maintains the colloidal state even when mixed with the sludge, furthermore, the colloidal dispersion and the sludge are mixed and aggregated It provides the effect of increasing the sludge recovery rate by reducing the diameter of the

In addition, the dispersibility enhancer may further include an additional composition in addition to propylene carbonate. The steps for preparing such a dispersibility enhancer are as follows.

6 is a flowchart illustrating the steps of preparing a dispersibility enhancer.

Referring to FIG. 6 , the dispersibility enhancer of the present invention comprises a step of preparing a first mixture (S41), a step of preparing a second mixture (S42), and a step of completing the dispersibility enhancer (S43). characterized in that it is manufactured.

(S41) step of preparing the first mixture

A first mixed solution is prepared by mixing 30 to 50 parts by weight of propylene carbonate, 30 to 50 parts by weight of water, and 10 to 30 parts by weight of 2-butoxyethanol.

Propylene carbonate serves to reduce the viscosity of the mixed material as described above, thereby increasing the miscibility of various components added to the stabilizer, and water is added as a solvent of the first mixed solution.

2-Butoxyethanol is a kind of solvent with excellent viscosity reducing effect. When added to a dispersibility enhancer and mixed with a stabilizer, in the sludge recovery agent containing the stabilizer, the stabilizer enhances the viscosity reduction function of the colloidal dispersion. perform the function

(S42) preparing a secondary mixture

Then, 80 to 95 parts by weight of the first mixed solution, 5 to 15 parts by weight of dextrin palmitate, and 1 to 10 parts by weight of aminomethyl propanol are mixed to prepare a second mixed solution.

Dextrin palmitate is a lipophilic surfactant synthesized by reacting dextrin and acyl chloride. As most of the dispersibility enhancers and stabilizers of the present invention contain water-based surfactants, various surfactants are added by adding oil-based surfactants. It is added to maximize the effect of adjusting the size of aggregates and maintaining the colloid.

Aminomethylpropanol serves as a pH adjuster, and is added to adjust the pH, which can be reduced by oxalic acid dihydrate, etc., to a neutral range when included in a dispersibility enhancer and added to a stabilizer.

(S43) Step of completing the dispersibility enhancer

Finally, 88 to 98 parts by weight of the secondary mixture, 1 to 10 parts by weight of 2-Octyldodecanol, and 1 to 5 parts by weight of Stearalkonium Hectorite are mixed to enhance the dispersibility. complete the

2-octyldodecanol is a colorless and clear liquid, and serves to form an emulsion so that an oil-based surfactant such as dextrin palmitate described above can be mixed with a dispersibility enhancer having a water-based component, and further serves as an antifoaming agent It functions to reduce foaming by combining

Stearalkonium hectorite is a substance obtained by ion-exchanging a cation mainly composed of sodium ions in hectorite with benzyldimethylstearylammonium, and functions as a suspending agent. perform the role That is, it serves to promote the dispersion of solids in the liquid to form a stable colloidal dispersion.

Therefore, through such a dispersibility enhancer, the bentonite contained in the sludge recovery agent maintains the colloidal form for a longer time, and at the same time, the sludge recovery agent and the sludge are mixed to strengthen the role of reducing the diameter of the agglomerate treated, and further By blocking metal ions contained in sludge or other residues, it suppresses agglomeration and provides the effect of maximizing the miscibility between materials.

As described so far, the configuration and action of the directional press-in method with enhanced excavation force according to the present invention are expressed in the above description and drawings, but this is merely an example and the spirit of the present invention is not limited to the above description and drawings. It goes without saying that various changes and modifications are possible within the scope without departing from the technical spirit of the present invention.

10: entry hole 20: reach hole
30: excavator 40: drill pipe
50: reamer 60: pipe
100: excavator

Claims (9)

As a directional press-in method with enhanced digging power,
A first step of forming an entry hole by excavating a predetermined portion of the ground surface to a predetermined depth, and installing an excavator having an excavator at the tip side of the entry hole;
a second step of forming an excavation hole into the underground through the excavator while spraying the excavation composition including an abrasive and water into the excavation hole by the spraying means mounted on the excavator;
A third step of separating the excavator from the front end of the excavator and then excavating the excavation hole by coupling the reamer to the excavator;
The abrasive is
30 to 50 parts by weight of an abrasive base comprising at least one of sodium bicarbonate and, corn cob and quartz sand,
5 to 15 parts by weight of an abrasive strengthening agent including garnet powder, and 35 to 65 parts by weight of water, a directional press-in method with enhanced digging force. The method of claim 1,
the excavator,
A directional press-in method with enhanced digging force, characterized in that it comprises at least one of a water hammer unit and a water jet for spraying the excavation composition into the excavation hole. delete The method of claim 1,
The abrasive enhancer,
preparing a first mixed solution by mixing 30 to 50 parts by weight of garnet powder, 15 to 30 parts by weight of urea, and 20 to 55 parts by weight of a melamine resin;
80 to 90 parts by weight of the first mixture, 5 to 15 parts by weight of fused alumina, 1 to 5 parts by weight of aluminum monostearate, and ethylenediamine tetraacetic acid ) preparing a second mixed solution by mixing 1 to 5 parts by weight;
85 to 95 parts by weight of the second mixture, 1 to 5 parts by weight of tetraethylammonium hydroxide, and a vinyl acetate-butyl acrylate copolymer (Vinyl acetate-Butyl acrylate Copolymer). To complete the polishing enhancer by mixing 10 parts by weight; characterized in that produced through, the directional press-in method with enhanced digging force. 5. The method of claim 4,
The physical property improving agent,
40 to 70 parts by weight of vinyl acetate-butyl acrylate copolymer and 20 to 40 parts by weight of polyvinyl alcohol, and 5 to 15 parts by weight of tetradecyl trimethyl ammonium bromide preparing a first solution by mixing parts by weight;
80 to 90 parts by weight of the first solution, and 5 to 15 parts by weight of polylactide-polycyclohexene carbonate-polylactide (PLA-PCHC-PLA: poly(lactide)-poly(cyclohexene carbonate)-poly(lactide)) and 3 to 10 parts by weight of sodium dodecyl sulfate to prepare a secondary solution;
Completing a physical property improving agent by mixing 85 to 98 parts by weight of the secondary solution, 1 to 10 parts by weight of furfuryl sulphide, and 1 to 10 parts by weight of 2-ethyl hexanol; A directional press-in method with enhanced excavation force, characterized in that it is manufactured through. The method of claim 1,
After the third step,
Grouting step of injecting a filler into the inner wall of the drilled hole; characterized in that it comprises, the directional press-in method with enhanced digging force. The method of claim 1,
After the third step,
Coagulation step of coagulating the sludge of the drilled hole by spraying a sludge recovery agent into the drilled hole through a spray module mounted on the drilling device;
Including; including a;
The sludge recovery agent,
40 to 80 parts by weight of water, 5 to 20 parts by weight of bentonite, and 1 to 10 parts by weight of a stabilizer comprising ammonium lauryl sulfate (ALS: Ammonium Lauryl Sulphate). press-fitting method. 8. The method of claim 7,
The stabilizer is
Preparing a first solution by mixing 20 to 40 parts by weight of ammonium lauryl sulfate (ALS: Ammonium Lauryl Sulphate), 15 to 30 parts by weight of water, and 10 to 20 parts by weight of n-dodecyl mercaptan;
75 to 90 parts by weight of the first solution, 3 to 15 parts by weight of sodium dodecyl sulfate, 5 to 20 parts by weight of lauryl alcohol ethoxylate, and polydimethylsiloxane (PDMS) : preparing a second solution by mixing 3 to 10 parts by weight of polydimethyl siloxane;
85 to 95 parts by weight of the second solution, 1 to 5 parts by weight of oxalic acid dihydrate and 1 to 10 parts by weight of a dispersibility enhancer containing propylene carbonate to complete the stabilizer Step; characterized in that manufactured through, the directional indentation method with enhanced excavation force. 9. The method of claim 8,
The dispersibility enhancing agent,
Preparing a first mixed solution by mixing 30 to 50 parts by weight of propylene carbonate, 30 to 50 parts by weight of water, and 10 to 30 parts by weight of 2-butoxyethanol;
preparing a second mixture by mixing 80 to 95 parts by weight of the first mixture, 5 to 15 parts by weight of dextrin palmitate, and 1 to 10 parts by weight of aminomethyl propanol;
88 to 98 parts by weight of the secondary mixture, 1 to 10 parts by weight of 2-Octyldodecanol, and 1 to 5 parts by weight of Stearalkonium Hectorite are mixed to complete a dispersibility enhancer A directional press-in method with enhanced excavation force, characterized in that it is manufactured through;

Images