KR20130090116A

KR20130090116A - Construction method of ground hardening pile and construction apparatus thereof

Info

Publication number: KR20130090116A
Application number: KR1020120011210A
Authority: KR
Inventors: 윤남식
Original assignee: (주)지성이씨에스
Priority date: 2012-02-03
Filing date: 2012-02-03
Publication date: 2013-08-13

Abstract

The present invention relates to a method and a device for forming a ground hardening column, and more particularly, an arc cross section having a center angle (α) corresponding to a desired angle of the ground hardening column while rotating in one direction without rotating the injection rod in the forward and reverse directions. The present invention relates to a method for forming a ground hardened column and a device thereof.
Ground hardening pillar forming method according to the present invention by connecting a plurality of injection rods to the ground is inserted into the bottom of the injection rods and coaxially up and down through the injection nozzle hardened material, water and compressed air to eject the high pressure, inside the ground In the method of forming a ground hardening column having an arc-shaped ground hardening column having a center angle α of a desired angle, the hardening material, water and compressed air are ejected from the injection nozzle of the lowest injection rod at the starting point of the center angle. And stopping the ejection of the hardened material, the water and the compressed air at the end point of the center angle to form the ground hardened column of the arc-shaped cross section while rotating the injection rod only in one direction.
The ground hardening column forming apparatus according to the present invention connects a plurality of injection rods to the ground and inserts them into the ground and sprays hardened material, water, and compressed air through the injection nozzles provided to coaxially up and down the lowermost injection rod, and then discharges them into the ground. A ground hardening column forming apparatus for forming a ground hardening column having an arc-shaped cross section having a central angle α of a desired angle, wherein the injection rod or the injection is formed at an angle corresponding to the central angle α of the desired angle. A first sensing piece and a second sensing piece disposed on the member interlocked with the rod; A detector configured to generate a detection signal when the first sensing piece and the second sensing piece are detected; A three-way valve installed in a supply line for supplying hardened material, water, and compressed air to the injection rod; And controlling the opening and closing operation of the three-way valve so that hardening material, water, and compressed air are supplied to the injection rod when the first sensing piece is sensed by the sensing unit, and when the second sensing piece is detected by the sensing unit, the injection rod It characterized in that it comprises a valve control unit for controlling the opening and closing operation of the three-way valve so that the supply of the furnace hardener and water and compressed air.

Description

Ground hardening pillar formation method and apparatus therefor {CONSTRUCTION METHOD OF GROUND HARDENING PILE AND CONSTRUCTION APPARATUS THEREOF}

The present invention relates to a method and a device for forming a ground hardening column, and more particularly, an arc cross section having a center angle (α) corresponding to a desired angle of the ground hardening column while rotating in one direction without rotating the injection rod in the forward and reverse directions. The present invention relates to a method for forming a ground hardened column and a device thereof.

In general, ground hardening pillars are constructed in the ground to stabilize the soft ground or to adjust the foundation and ground work of the structure. The ground hardening pillar is inserted into the ground by inserting a swivel at the top and a crown having a spout as an annulus at the top, as shown in Korean Patent Laid-Open Publication No. 10-1983-0007970, and swivel The hardening agent is introduced into the injection tube through the ground curing agent injection method in which the injection tube is raised while ejecting from the annular jet port at the tip to form the ground hardened layer.

In this construction method, since the annular ejection port of the tip is rotated to eject and form a curing agent, the cured product column is constructed in a cylindrical shape. Accordingly, even when the pressure of the soil is not so large, it has to be always formed in a cylindrical shape. Therefore, there is a problem in that the city park price is increased due to the consumption of unnecessary raw materials. Even when it is necessary to form such as, there is a disadvantage that acts as a barrier to the construction of the construction as it is formed in a cylindrical shape.

In order to improve such a problem, the Republic of Korea Patent Registration No. 10-0100984 is inserted into the target material (S) with a predetermined operating mechanism (1) as shown in Figure 1a to 1c inserted into the target material (S) Then, the injection rod 2 is rotated and raised while spraying hardened material and fresh water from the injection nozzle 3a installed on the uppermost rod member 3 so as to form a base hardened column P in the target ground S. In the method of forming the ground hardened column, the injection nozzle 3a provided in the uppermost rod member 3 is arranged in a straight line up and down, and the injection rod 2 is fixed at an angle (α) with the operation mechanism 1. Ground hardening column to form a circular arc shaped ground hardening column having a center angle equal to the forward and backward rotating angle α of the injection rod 2 by raising the positive and reverse rotations within a range of forming a central angle of Formation method is disclosed .

In addition, the injection rod (2) has a polygonal outer surface that fits into the groove portion (2a) having a polygonal inner surface at one end and the groove at the other end as a connecting means of the connecting portion so as not to be separated even during forward and reverse rotation. Excited protrusion 2b is formed, and the bolt is inserted and fixed in a state where the groove 2a and the protrusion 2b are fitted to each other. In addition, the injection rod 2 is formed with a recognition mark (2c) so that the injection rod can be connected to each other while checking the injection nozzle direction of the lowermost injection rod.

Patent No. 10-0100984 as described above can be formed in the target ground in the target ground to form a cured pile of circular arc cross-sectional shape with a predetermined angle (α), thereby reducing the construction cost and There is an effect that can shorten the construction period, but there are disadvantages that accompany the following problems.

First, the method of forming the ground hardener pillar according to the above-described Patent Registration No. 10-0100984 requires a rotation of the injection rod in the forward and reverse directions, so it is impossible to work with a conventional ground drilling device configured to rotate only in one direction. There are disadvantages to remodeling or making new ones.

In addition, the conventional method of forming the ground hardening column is a failure occurs when the injection rod is rotated forward and backward for a long time, and the failure of the ground excavation device, causing wear and damage of the injection rod connection part, so frequent maintenance work is required for downtime Due to the increase of construction period, there is a disadvantage that the increase of the construction period and the increase of maintenance cost. In particular, if a failure occurs during the injection of the curing agent has a disadvantage that causes a serious adverse effect on the construction quality.

In addition, in the conventional ground hardening column forming apparatus as shown in Fig. 1c, the polygonal groove 2a at one end and the polygonal protrusion 2b at the other end in order to prevent the injection rod 2 from being separated even during forward and reverse rotation. ) Is formed, and as the assembling rod is assembled by inserting and fixing the bolt in the state where the recess 2a and the protrusion 2b are fitted together, the assembly is complicated and inconvenient, and the injection rod is processed separately. There is a problem with the increase in the construction cost because it must be manufactured or.

The present invention has been proposed in view of the above, and the ground which can be formed in the circular cross-sectional shape having the center angle (α) of the ground hardening column by the desired angle while rotating in one direction without rotating the injection rod in the forward and reverse It is an object of the present invention to provide a method for forming a cured pillar and a device thereof.

In order to achieve the above object, the ground hardening column formation method according to the present invention is connected to the plurality of injection rods in the ground by inserting and inserting the coaxially up and down on the lower injection rod hardening material and water and compressed air through the injection nozzle In the ground hardening column forming method of ejecting and forming a ground hardening column having an arc-shaped cross section having a central angle α in the ground, the hardening material from the injection nozzle of the lowest injection rod at the starting point of the center angle. And water and compressed air are ejected and the ejection of hardened material and water and compressed air is stopped at the end point of the center angle so as to form the ground hardened column of the arc-shaped cross section while rotating the injection rod only in one direction. .

In order to achieve the above object, the ground hardening column forming apparatus according to the present invention connects a plurality of injection rods to the ground and inserts the high pressure hardening material, water and compressed air through the injection nozzles provided to coaxially up and down the lowermost injection rod. In the ground hardening column forming apparatus which ejects and forms the ground hardening column of the arc-shaped cross section which has the center angle (alpha) of the desired angle inside the ground, the angle corresponding to the center angle (alpha) as much as the said desired angle. A first sensing piece and a second sensing piece disposed on the injection rod or a member interworking with the injection rod; A detector configured to generate a detection signal when the first sensing piece and the second sensing piece are detected; A three-way valve installed in a supply line for supplying hardened material, water, and compressed air to the injection rod; And controlling the opening and closing operation of the three-way valve so that hardening material, water, and compressed air are supplied to the injection rod when the first sensing piece is sensed by the sensing unit, and when the second sensing piece is detected by the sensing unit, the injection rod It characterized in that it comprises a valve control unit for controlling the opening and closing operation of the three-way valve so that the supply of the furnace hardener and water and compressed air.

The recovery line may be connected to the three-way valve to return or exhaust the hardened material, the water, and the compressed air when the supply of the hardened material, the water, and the compressed air is blocked in the injection rod direction.

The first and second sensing pieces may be detachably installed on an output shaft of an auger machine for rotating the injection rod, and the sensing part may correspond to the first and second sensing pieces. Can be installed on

According to the method and the apparatus for forming a ground hardening column according to the present invention, even if the injection rod is rotated in only one direction, the ground hardening column can be constructed with an arc-shaped cross section. It can be, and there is no need to separately manufacture or improve the injection rod capable of reverse rotation, there is a reduction in construction cost according to the reduction of the investment cost of the facility.

And according to the present invention, because the construction through the one-way rotation of the injection rod can prevent the failure of the misalignment device, power generation and transmission device of the ground excavation device, wear or damage of the connection portion of the injection rod can be installed without downtime Therefore, the construction quality can be improved and productivity improvement and maintenance cost can be reduced by increasing uptime.

Figures 1a to 1c is a view for explaining the conventional ground hardening column formation method and apparatus,
2a and 2b is a view for explaining a method and apparatus for forming a ground hardening column according to the present invention,
Figure 3 is a schematic diagram for explaining the ground hardening pillar forming apparatus according to an embodiment of the present invention,
4 is an enlarged perspective view of portion B of FIG. 3;
Figure 5 is a schematic plan view for explaining the construction example of the ground hardened column pillar forming apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2a and Figure 2b is a view for explaining the method and apparatus for forming the ground hardener pillar according to the present invention, Figure 2a is a schematic diagram showing the construction situation according to the method and apparatus for forming the ground hardener pillar, Figure 2b is the ground It is a cross-sectional view briefly showing the injection direction of the hardening material, water and compressed air to form a hardened body pillar.

2A and 2B, the ground hardening column formation method according to an embodiment of the present invention by connecting a plurality of injection rods 11 to the ground excavation device (1, crawler crane) for the excavation of the ground to the ground Inserted, the injection nozzle is provided to be coaxially up and down on the lower injection rod 12, and the hardened material, water and compressed air are ejected under high pressure, to form a ground hardening column (p), the desired angle inside the ground While the injection rod 11 is rotated only in one direction to form a ground hardened column p having an arc-shaped cross section having a center angle α, the hardened material, water and compressed air at the starting point s1 of the center angle α This is done by blowing off and stopping the release of hardener, water and compressed air at the end point (p) of the central angle.

That is, as the lowermost injection rod 12 including the injection rod 11 is rotated by the operation of the misalignment device provided in the ground excavation apparatus, as shown in FIG. 2B, the upper portion of the ground hardening pillar at its starting point s1 is shown. Water and compressed air are ejected under high pressure and sprayed through the spray nozzles provided in the cutting chamber to cut the soft ground to provide a receiving space. To be implemented. At the end point s2 of the ground hardener column, the ejection of hardened material, water and compressed air from the spray nozzle is stopped, so that the ground hardened column having a center angle of "α" between the starting point s1 and the end point s2 is obtained. do.

On the other hand, as described above, the control operation of the hardened material and the water and the compressed air ejected from the lowermost injection rod 12 directly controls the driving of the supply device (for example, equipment such as a pump car) that supplies the hardened material, the water, and the compressed air. The first sensing piece and the second sensing piece may be disposed on the injection rod or the member interlocked with the injection rod at an angle corresponding to the center angle α of the desired angle as described in detail below. Then, according to the detection signal of the sensing unit for detecting the first sensing piece and the second sensing piece is carried out in a manner to interrupt the flow of the hardener and water and compressed air supplied to the injection rod.

The ground hardening pillar forming method can be constructed to reconstruct the ground hardening pillar of the arc-shaped cross section having a central angle α of the desired angle even if the injection rod 11 is rotated in only one direction. There is an advantage that can be used without compatibility. In addition, since construction is performed through one-way rotation of the injection rod, it is possible to prevent failure of the misalignment device, power generation and transmission device of the ground excavation device, wear or damage of the connection part of the injection rod, and thus it can be installed without downtime. Can improve productivity and reduce maintenance costs by increasing uptime.

Hereinafter, an embodiment of a concrete ground hardening column forming apparatus capable of implementing the above-described ground hardening column forming method will be described.

Figure 3 is a schematic configuration diagram for explaining the ground hardening pillar forming apparatus according to an embodiment of the present invention, Figure 4 is an enlarged perspective view of portion B of FIG.

Referring to Figures 3 and 4, the ground hardening column forming apparatus is a plurality of injection rods 11 are installed in the ground excavation device (1) for the excavation of the ground and connected to each other and inserted into the ground, a plurality of The lowermost injection rod 12 connected to the lowermost of the injection rods and having high pressure and ejection of the hardener, water and compressed air, and the ejection direction of the hardener, water and compressed air ejected from the injection nozzle of the lowest injection rod 12 are controlled. A first sensing piece 21 and a second sensing piece 22, a sensing unit 23, a three-way valve 24, and a valve control unit (not shown) are provided as a configuration for the purpose. A ground hardening column p having an arcuate cross section having a central angle α of is formed.

The injection rod 11 transmits rotational force from the organ device 15 installed in the form of being suspended by a wire cable 17 on an upper end of a leader 14 installed in a longitudinal direction on a support arm of a ground excavator such as a crawler crane. It is configured to receive and rotate. More specifically, the swivel 16 is connected to the lower side of the organ device 15 and the injection rod 11 is connected to the swivel 16 to rotate, and the swivel 16 is the output shaft of the organ device 15. It consists of the rotator 16a connected to 15a, and the outer cylinder 16b arrange | positioned outside this rotator.

In addition, the injection rod 11 is composed of a plurality of pieces are assembled in such a way that they are connected to each other and extend in accordance with the depth inserted into the ground in accordance with the present invention even if the injection rod 11 is rotated in one direction only ground Since the hardened body pillar is constructed, it can be configured in a simple structure without the need to form a separate groove or protrusion on the injection rod as shown in the background art (Registration No. 10-0100984). For example, the connection portion of each injection rod 11 may be formed in a structure in which the connection operation is easily performed and the manufacturing cost is low, such as a screwing method.

The lowermost injection rod 12 is connected to the lowermost side of the injection rod 11 inserted into the ground, the first injection portion is provided with a high-pressure injection nozzle for ejecting the high pressure of water and compressed air, the high pressure of the hardening material The second injection unit is provided with a spray nozzle for ejecting.

The first sensing piece 21 and the second sensing piece 22 extend from the center with the starting point s1 of the hardening material, the water and the compressed air for forming the ground hardening column p, and the center angle therebetween. One of the radial segments) and the end point (s2, which means the other of the two radial segments extending from the center with the center angle in between) and the member connected to the injection rod or injection rod. have.

In addition, the first sensing piece 21 and the second sensing piece 22 may be configured in various forms without limitation as long as the structure can be easily sensed by the sensing unit 23 to be described later. As shown in 4, it is formed in the form of a bolt that is easy to disassemble and assemble. Further, the first and second sensing pieces 21 and 22 are detachably attached to the output shaft 15a of the auger machine 15 which rotates the injection rod. In addition, the first sensing piece 21 can be adjusted at the site where the first sensing piece 21 and the second sensing piece 22 are installed in accordance with the desired center angle α of the ground hardening column p. And a plurality of fastening holes capable of fastening the second sensing pieces 22 at a predetermined angle.

The sensing unit 23 is configured to generate a detection signal when the first sensing piece 21 and the second sensing piece 22 are detected. Various sensing sensors may be applied, but in this embodiment, the proximity sensor is selected and configured. do.

In addition, the sensing unit 23 is installed close to the position corresponding to the first and second sensing pieces so as to generate a switching signal when the first and second sensing pieces 21 and 22 are detected. In the example, since the first sensing piece 21 and the second sensing piece 22 are installed on the output shaft 15a of the auger machine 15, the first sensing piece 21 and the second sensing piece 22 are installed on the outer cylinder 16b of the swivel 16 so as to correspond thereto. do.

The three-way valve 24 is a valve having three flow paths formed in the valve body. In this embodiment, the three-way valve 24a for the hardener is connected to a supply line for supplying the hardener, and water and compressed air. It consists of the three-way valve 24b for water connected to the supply line 31 for supplying of water. In addition, the three-way valve 24 is provided in the first supply line 31a, 31b disposed between the supply device 4 and the injection rod 11 to supply the hardened material, water, and compressed air to the injection rod 11. And a second connection part connected thereto, and a recovery line 32 is connected to the third connection part to return or exhaust the hardened material, the water, and the compressed air when the supply rod 11 is cut off from the supply of the hardened material, the water, and the compressed air. have.

In addition, a three-way valve 24 is provided in the valve body to open and close the opening and closing means (not shown, the opening and closing body for opening and closing the flow path, such as disk or ball), and the valve control unit (not shown) It consists of an automatic valve equipped with a drive actuator (not shown) for operating the opening and closing means in accordance with the drive signal of the).

The valve control unit (not shown) is configured to control the opening and closing operation of the three-way valve, and when the first sensing piece 21 is detected by the sensing unit 23, the hardener, water, and compressed air are supplied to the injection rod 11. The opening and closing operation of the three-way valve 24 is controlled so that the second detection piece 22 is detected by the detection unit 23, and the injection rod 11 blocks the supply of the hardening material, the water, and the compressed air. The ground hardening pillar p having the center angle corresponding to the placement angles of the second sensing pieces 21 and 22 is controlled to be formed.

Figure 5 is a schematic plan view for explaining the construction example of the ground hardened column pillar forming apparatus according to an embodiment of the present invention.

As shown in FIG. 5, the sensing unit 23 is preferably installed at a position ahead of the starting point s1 of the ground hardening column p by a predetermined angle β.

In this way, when the sensing unit 23 is installed at a position ahead of the starting point s1 of the ground hardening column p by a predetermined angle β, the first sensing piece 21 is the starting point s1 of the ground hardening column p. Since it is sensed in a more advanced position, the three-way valve 24 can also perform the injection operation more accurately while the line is opened. That is, when the three-way valve 24 is opened a little faster, even if a time difference occurs in the process of transferring the hardened material or water and the compressed air to the lowest injection rod 12 from the supply device 4 to compensate for this time difference ground ground body It is to be able to eject exactly at the starting point (s1) of the column (p).

Then, when the sensing unit 23 is installed at a position ahead of the start point of the ground hardening column p by a predetermined angle, the second sensing piece 22 also passes through the end point s2 of the ground hardening column p. Since the sensing unit 23 is detected at a position ahead of a predetermined angle, the closing operation of the three-way valve 24 is performed a little faster. In this way, when the closing operation of the three-way valve 24 is performed a little earlier, the end point of the hardened material, the water, and the compressed air being pushed into the supply line 31 and the injection rod 11 in the ground hardening column p, s2. Since it is possible to prevent the phenomenon of eruption after passing through), it is possible to more accurately form the ground hardening pillar (p).

In addition, the installation position of the sensing unit 23 may be used for various conditions such as supply pressure of hardened material, water and compressed air, installation position of the three-way valve 24, length of the supply line 31 and the injection rod 11, and the like. If it is arithmetic calculation or standardization based on data accumulated through experiment, it can be properly adjusted according to working conditions or situation.

Hereinafter, the operation of the ground hardening pillar forming apparatus according to an embodiment of the present invention will be described briefly.

First, the ground excavation device 1 and the supply device 4 are arranged at the construction site, and the preliminary preparation is performed such as to connect the injection rod 11 and the lowest injection rod 12, and then the ground hardening column to be constructed (p). The first and second sensing pieces 21 and 22 are installed according to the shape and the center angle of the c), and the injection rod 11 is inserted into the ground by operating the ground excavator in the state in which the sensing unit 23 is positioned.

Then, when the construction point of the ground hardening column (p) is reached, the water and the compressed air are ejected under high pressure and ejected through the upper injection nozzle while rotating the lower injection rod 12 to cut the soft ground and at the same time the lower injection rod 12. When the hardening material is ejected to the spray nozzle provided in the lower portion of the lower portion and gradually raised, the ground hardened column of the arc-shaped cross section having the center angle is adjusted.

In this case, as shown in FIGS. 3 and 5, the three-way valve 24 is opened according to the detection signal of the sensing unit 23 that detects the first sensing piece 21 to start the starting point of the ground hardening column p. In s1), the hardened material, water, and compressed air are ejected to the lowest injection rod 12 via the injection rod 11, and according to the detection signal of the detection unit 23 detecting the second detection piece 22, the three-way. When the valve 24 is closed, the hardening material, the water and the compressed air are blocked at the end point s2 of the ground hardening column p, thereby forming a ground hardening column having a desired center angle. In addition, when the three-way valve 24 is blocked, since the hardened material, water, and compressed air are recovered through the recovery line 32, the three-way valve 24 may be reused without waste of raw materials.

What has been described above is only one embodiment for implementing the method and the device for ground hardening pillar according to the present invention, the present invention is not limited to the above embodiment, as claimed in the following claims Those skilled in the art to which the present invention pertains without departing from the gist of the present invention will have the technical idea of the present invention to the extent that various modifications can be made.

1: Ground Excavator 11: Injection Rod
12: Lower injection rod 14: Leader
15: Ogagi 16: swivel
16a: Rotator 16b: External cylinder
17: wire cable 21: first sensing piece
22: 2nd sensing piece 23: sensing part
24: Three-way valve 31: Supply line
32: recovery line 4: feeder
p: ground hard column

Claims

A plurality of injection rods are connected to the ground and inserted into the ground, and the injection nozzles are arranged to be coaxially up and down with the lower injection rod. In the ground hardening column formation method of forming the ground hardening column of the arc-shaped cross section which has,
At the start of the center angle, the hardening material, water and compressed air are ejected from the injection nozzle of the lowest injection rod, and the ejection of the hardening material, water and compressed air is stopped at the end point of the center angle so that the injection rod is rotated only in one direction. A method of forming a ground hardening column, wherein the ground hardening column has an arc-shaped cross section.

A plurality of injection rods are connected to the ground and inserted into the ground, and the injection nozzles are arranged to be coaxially up and down with the lower injection rod. In the ground hardening column forming apparatus for forming a ground hardening column having an arc-shaped cross section,
A first sensing piece and a second sensing piece disposed on the injection rod or the member interlocked with the injection rod at an angle corresponding to the center angle α by the desired angle;
A detector configured to generate a detection signal when the first sensing piece and the second sensing piece are detected;
A three-way valve installed in a supply line for supplying hardened material, water, and compressed air to the injection rod; And
When the first sensing piece is detected in the sensing unit, the opening and closing operation of the three-way valve is controlled to supply hardening material, water, and compressed air to the injection rod side, and when the second sensing piece is detected in the sensing unit, the injection rod And a valve control unit controlling an opening and closing operation of the three-way valve so that supply of hardened material, water, and compressed air is blocked.

The method of claim 2,
And the recovery line is connected to the three-way valve so that the supply of hardener, water, and compressed air in the direction of the injection rod is blocked so that the hardener, water, and compressed air are returned or exhausted.

The method of claim 3,
The first and second sensing pieces are detachably installed on an output shaft of an auger machine that rotates the injection rod, and the sensing part is installed on the outer cylinder of the swivel to correspond to the first and second sensing pieces. Ground hardening pillar forming apparatus, characterized in that.