KR101429634B1 - Grouting reinforced spiral steel pipe pile - Google Patents

Abstract

More particularly, the present invention relates to a spiral steel pipe pile having improved supportability through grouting while permitting intrusion installation, and a method of lifting the foundation by lifting the casing and the steel material, Reinforced grooved steel pipe file.
The grouting reinforced spiral steel pipe pile according to the present invention is formed of at least one steel pipe pile having a cylindrical shape and having a sharp tip at the tip so as to be installed by perforation, A spiral wing for penetrating the steel pipe file while disturbing the ground by rotation; a spiral wedge formed through an outer circumferential surface of the steel pipe and formed at a rear end of the spiral wing, And a first grouting jet port for jetting the grout to the void portion of the disturbed ground along the path.

Description

{GROUTING REINFORCED SPIRAL STEEL PIPE PILE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grouting reinforced spiral steel pipe file, and more particularly, to a grouting reinforced steel pipe pipe having a spiral steel pipe file which improves the supporting force through grouting while allowing rotational penetration installation, File.

Since the stability of the structures installed on the ground is ensured by the interaction with the ground, the stability of the structure is determined according to the stability of the ground. If the ground conditions are changed such as the inflow of groundwater or the surrounding environment, Is required.

As a conventional technique of a pile method for reinforcing the supportability of a structure to a soft foundation, direct pile file method, line pile file insertion method, indentation pile method, field pile file method, micro pile method and screw auger file method are representative.

Among the screw auger file method, there is a method using a helical steel file. The helical steel file is a steel file having a helical wing mounted on the outer circumferential surface. It is a file that can be intruded by a helical wing without any additional equipment.

However, since such a helical steel filing method is merely penetrated into the ground without forming a bulb by grouting, there is a limitation in reinforcing the supporting force of the steel pile due to disturbance and relaxation of the steel filing ground caused by penetration.

In order to solve such a problem, a device for injecting grouting through a through hole is formed by forming a through hole on the outer circumferential surface of a spiral steel material pile. However, when the spiral blades are penetrated while rotating, irregular fluid rotation causes the gap However, since the ground in the path where the spiral wing passes is formed with a lot of gaps and becomes softer, the through hole may be blocked by the soil of the ground, and the grouting injection filling effect may not be obtained .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a grouting reinforced spiral steel pipe file capable of forming a bulb by grouting.

Also, it is an object of the present invention to provide a grouting reinforced steel pipe tube structure in which a first grouting air outlet is formed at the rear end of a spiral blade so that grouting can be easily injected, and the first grouting air outlet is prevented from being closed.

Further, it is intended to provide a grouting reinforced spiral steel pipe pipe capable of reinforcing the ground reinforcement by inserting a steel pipe casing and a steel pipe casing reinforcing the steel pipe file at the upper end of the spiral wing after the steel pipe file is penetrated by the rotation of the spiral wing.

According to the present invention, there is provided a grouting-reinforced spiral-shaped steel pipe file comprising a steel pipe file having a sharp-tipped end and being in the form of a cylindrical pipe, A spiral wing for penetrating the steel pipe pile into the ground while disturbing the ground by rotation, and a spiral wedge formed through the outer peripheral surface of the steel pipe pile, And a first grouting jet port formed on the spiral wing for jetting the grout to the gap portion of the ground disturbed along the rotation path of the spiral wing.

In order to solve the unevenness of the pile type and the supporting force due to irregular pores generated at the time of penetrating the rotating ground of the steel pipe pile on the upper side of the spiral wing formed on the uppermost side of the outer peripheral surface of the steel pipe file, It is preferable to provide a wing for opening to form a gap, and further, there is a casing spreading which is a wing plate for inserting a steel pipe to be inserted for reinforcing the ground disturbed by the weak spiral wing .

A casing extension is formed on the outer circumferential surface of the steel pipe file on the upper side of the spiral wing in the form of a ground expanding vane plate. A steel pipe casing is inserted and mounted in an area expanded by the casing expansion, Grouting is to be filled.

Here, a steel bar for reinforcing the foundation pillar can be inserted into the inner diameter side of the steel pipe file.

Here, the end of the helical wing is further formed with a first injection part enlarging part for facilitating the injection of the grouting material, one side of which is in contact with the helical wing and the other side of which is in contact with the outer circumferential surface of the pipe, .

Here, it is preferable that the first injection portion enlargement has a shape of a triangular pyramid, and the front end side is a vertex and the end side is a triangular surface with respect to the rotation direction of the helical wings.

Here, the end of the helical wing is further formed with a first injection part enlarging part which facilitates the injection of the grouting material, one side of which is in contact with the helical wing and the other side of which is in contact with the outer circumferential surface of the pipe, , A second grouting jet port is formed on one side of the steel pipe pile on the upper side where the helical wing is formed, and a second injection port enlargement forming the ground for pouring the grouting material jetted from the second grouting jet port is further formed .

According to the structure of the present invention described above, it is possible to form a bulb by grouting and to form a first grouting jet port at the rear end of the helical blade to prevent the first grouting jet port from being closed, It is possible to provide a grouting reinforced spiral steel pipe pipe capable of reinforcing the ground reinforcement by inserting a steel pipe casing and a steel pipe casing for reinforcing the steel pipe file at the upper end side of the spiral wing after the steel pipe file is penetrated by the rotation of the wing.

1 is a basic structural view of a grouting reinforced spiral steel pipe file according to the present invention.
2 is a structural view showing another embodiment of a spiral wing of a grouting reinforced spiral steel pipe pile according to the present invention.
FIG. 3 is a structural view of a grouting reinforced spiral steel pipe file in which a casing for forming a pile or a casing of a certain size or more is inserted into the structure of FIG. 1;
4 is a structural view of a grouting-reinforced spiral steel pipe pile in which a steel pipe casing is inserted into the structure of Fig. 3;
Fig. 5 is a structural view of a grouting reinforced spiral steel pipe pile in which a steel bar as a reinforcement is inserted into the structure of Fig. 4. Fig.
6 is a view showing a reinforcing state of the soft ground by the grouting reinforcing spiral steel pipe pile according to the present invention.
FIG. 7 is a structural view of a grouting-reinforced spiral steel pipe file in which a first injection part enlargement for grouting around a steel pipe file intruded into the structure of FIG. 1 is further formed.
8 is another example of the casing extension shown in Fig.
FIG. 9 is a construction flowchart using the spiral steel pipe file of FIG. 1. FIG.
FIG. 10 is a construction flowchart using the spiral steel pipe file of FIG. 4; FIG.
FIG. 11 is a construction flowchart using the spiral steel pipe file of FIG. 7. FIG.

Hereinafter, the structure and operation effects of the grouting reinforcing spiral steel pipe pile according to the present invention will be described with reference to the drawings.

1 is a basic structural view of a grouting reinforced spiral steel pipe file according to the present invention.

1, a grouting-reinforced spiral steel pipe pile 10 (hereinafter referred to as a "spiral steel pipe pile") according to the present invention comprises a steel pipe 11 and a spiral wing 12.

The steel pipe 11 may have a sharp-edged blade so that it can be installed by intrusion, and the inside of the steel pipe 11 is formed into a cylindrical tube shape so as to fill the grouting after penetration installation. A first grouting air outlet 13 is formed on the outer circumferential surface of one side of the steel pipe 11 in such a manner that the grouting is sprayed and filled.

The first grouting spout 13 is formed in the same number as the number of the spiral wings 12 and the forming position is formed just behind the end of the spiral wing 12.

The first grouting spout 13 is formed by grouting the pores of the disturbed ground while disturbing the ground due to the rotation of the spiral blade 12 during the installation of the steel pipe pile 11 by the rotation of the spiral wing 12 .

The reason why the first grouting spout 13 is formed immediately behind the end of the spiral blade 12 is that when the spiral blade 12 penetrates through the ground by rotation and the penetration of the disturbed ground is less than that of the existing ground, So that grouting is sprayed through the first grouting air outlet 13 in succession to the portion where the gap of the ground is generated by the spiral blade 12 to fill the space between the grouting spouts.

The spiral wing (12) allows the ground to be penetrated by rotation so that the steel pipe (11) can be installed by penetration.

The ground is disturbed more than the width of the spiral blade 12 because the penetration installation is performed by the spiral blade 12. When the grout material is injected through the steel pipe 11 and discharged by the first grouting air outlet 13 (Grouting along the ground disturbance path of the spiral blade 12 due to the formation position of the first grouting spout 13) grouting is performed while penetrating into the ground disturbance range so that the spiral wing 12 is disturbed by rotation A file bulb is formed and the tip end supporting force and the main surface friction force can be simultaneously increased.

2 is a structural view showing another embodiment of a spiral wing of a grouting reinforced spiral steel pipe pile according to the present invention.

The spiral steel pipe file 20 shown in FIG. 2 is an example of a form in which the width of the spiral blade 22 widens toward the upward direction, and the remaining structure is the same as in FIG.

FIG. 3 is a structural view of a grouting reinforced spiral steel pipe tube in which a casing extension for insertion of a steel pipe casing is formed in the structure of FIG. 1;

As shown in FIG. 3, the spiral steel pipe file 30 has a structure in which a casing reentry 31 is further formed in the spiral steel pipe file 10 of FIG.

The ground is disturbed by the rotation of the spiral blade 12 and the void portion of the disturbed ground is grouting by the first grouting jet 13 but the upper ground portion of the spiral blade 12, It is necessary to reinforce it because it remains in a disturbed state due to the presence of the dust particles 12.

The casing ream 31 is formed on the steel pipe 11, which is the upper portion of the spiral wing 12.

The casing reentry 31 is mounted on one side of the steel pipe file 11 and on the opposite side thereof in the form of a wing plate so as to interfere with the rotation of the steel pipe file 11 and surround the disturbed ground region caused by the spiral wing 12, And a perforation hole of a diameter equal to or larger than the diameter of the hole 31 is formed.

4 is a structural view of a grouting-reinforced spiral steel pipe pile in which a steel pipe casing is inserted into the structure of Fig. 3;

As shown in Fig. 4, the spiral steel pipe pile 40 takes a form in which the steel pipe casing 41 is inserted into the spiral steel pipe pile 30 shown in Fig.

The steel pipe casing 41 is inserted into the perforation hole formed by the casing reentry 31, and then the inner and outer portions thereof are filled with grouting, thereby reinforcing the soft ground.

Fig. 5 is a structural view of a grouting reinforced spiral steel pipe pile in which a steel bar as a reinforcement is inserted into the structure of Fig. 4. Fig.

As shown in Fig. 5, the spiral steel pipe file 50 has a shape in which a steel bar 51, which is a reinforcing material, is inserted into the inner center of the steel pipe file 11 in the spiral steel pipe file 40 of Fig.

Grouting is performed to the inside of the steel pipe pile 11 in a state where the steel bar 51 is inserted inside the steel pipe file 11 to further reinforce the supporting force of the foundation ground by the steel pipe piercing method.

The spiral steel pipe file 10 shown in Fig. 1 is a structure having a steel pipe file 11, a spiral wing 12 and a first grouting spout 13, and the spiral steel pipe file 30 shown in Fig. 4 and 5 show a structure in which the steel pipe casing 41 and the steel bar 51 are respectively reinforced with the base ground reinforcement 31, And a structure in which grout filling is additionally inserted to reinforce the spiral steel pipe file.

6 is a view showing a reinforcing state of the soft ground by the grouting reinforcing spiral steel pipe pile according to the present invention.

Referring to FIG. 6, there is shown a structural view of a ground reinforcement of a ground by a grouting reinforcing spiral steel pipe pile according to the present invention.

First, the steel pipe file 11 is penetrated by penetrating the ground 61 in a straight direction from the upper side to the lower side by the helical wing 12 while rotating the spiral steel pipe file 30 as shown in FIG.

The ground is disturbed by the rotation of the spiral blade 12 and the ground 61 is disturbed by the rotation of the spiral blade 12 and is disturbed by the first grouting vents 13 formed on the rear end side of the spiral vane 12 A grouting filler 15a is formed along the entering path of the spiral wing 12 through the void portion of the ground.

The ground on the upper side of the spiral blade 12 is placed in a disturbed state by the rotation of the spiral blade 12 and the portion is pierced by the casing reamer 31 rotated in conjunction with the rotation of the steel pipe file 11 Holes are formed.

A steel pipe casing 41 is inserted into a portion where the perforation hole is formed, and a steel rod 51 as a reinforcing material is inserted into the inner diameter side of the steel pipe pile 11 again.

The steel pipe casing 11 and the steel pipe casing 41 and the steel bar 51 are integrated so that the foundation of the soft ground is formed as a result of the grouting filling 15b being performed while the steel pipe casing 41 and the steel rods 51 are inserted and mounted. Making the reinforcement more robust and increasing the end bearing capacity and peripheral frictional force.

In this case, the first grouting spout 13 is located immediately behind the end of the spiral blade 12, and the grouting is smoothly filled above and below the end of the spiral blade 12 It is preferable to form the first injection section reamer 14.

The first injection portion reaming 14 is located above and below the end of the spiral blade 12 and has a contact surface where the spiral blade 12 and the steel pipe file 11 are in contact with each other and one surface is in contact with the steel pipe 11, 12 so as to be inclined at a predetermined inclination angle from the starting end side 14a toward the distal end side 14b in the direction of rotation corresponding to the direction in which the helical blade 12 is rotated.

The first injection section reaming 14 takes the form of a triangular pyramid, the vertex portion at the leading end side 14a facilitates penetration of the ground, and the distal end portion 14b facilitates the penetration of the grout ejected from the first grouting air- The injection of the ash is expanded to facilitate the injection of the grout material into the void portion of the ground disturbed by the spiral wing (12).

FIG. 7 is a structural view of a grouting reinforced spiral steel pipe file in which a first injection part enlargement for grouting around a steel pipe file intruded into the structure of FIG. 1 is further formed.

The spiral steel pipe file 70 shown in FIG. 7 has a structure in which a second grouting spout 71 and a second injection portion spool 72 are formed in the structure of the spiral steel pipe 10 shown in FIG.

Unlike the first grouting spout 13 shown in FIG. 1, the second grouting spout 71 is not formed at the end of the spiral blade 12 but is formed at the outer circumferential surface of the steel pipe 11 having no spiral blade 12, Is formed on the upper portion of the helical blade (12)

A second injection section reamer 72 is formed on the lower side of the second grouting jet port 71 and a second injection section reamer 72 is formed on the lower side of the second grouting jet port 71, And may be formed in the shape of a wing plate on the outer circumferential surface, preferably three spaced apart from each other by the same angle.

The second injection portion reaming portion 72 expands the region where grouting is not performed in the ground disturbed by the spiral blade 12 to fill the grouting material sprayed from the second grouting jetting portion 71 into the expanded region, Reinforcing the reinforcement of the ground.

8 is another example of the casing extension shown in Fig.

The casing ream 31 shown in Fig. 3 and the casing ream 81 shown in Fig. 8 have the same function and role as those of the casing ream 31 shown in Fig.

The casing reamer 81 is formed such that three wing plates are spaced at the same angle, which is a structure for stably mounting the steel pipe casing 41, but may be formed horizontally with two as shown in Fig. Also, the casing reamer 81 can further form the seat portion 82 so that the steel pipe casing 41 can be stably installed.

FIG. 9 is a construction flowchart using the spiral steel pipe file of FIG. 1. FIG.

First, referring to (A), the spiral steel pipe pile 10 is rotated, and the spiral blade 12 is pulled downward while rotating and disturbing the ground 61.

At this time, the ground disturbed by the rotation of the helical blade 12 is formed with a disturbance region along the rotation path of the helical blade 12, and the grouting injection is performed by the first grouting jet opening 13 formed at the end of the helical blade 12 . The grouting injection portion can be extended by the first injection portion re-filling 14, and rotational penetration is repeatedly performed to the required position (B to D).

D process, the upper side of the foundation foundation 61 forms a foundation concrete 91 layer to finish the basic foundation of the soft foundation.

FIG. 10 is a construction flowchart using the spiral steel pipe file of FIG. 4; FIG.

(A), the spiral steel pipe pile 40 is rotated, and the spiral blade 12 is pulled downward while rotating and disturbing the ground 61.

At this time, the ground disturbed by the rotation of the helical blade 12 is formed with a disturbance region along the rotation path of the helical blade 12, and the grouting injection is performed by the first grouting jet opening 13 formed at the end of the helical blade 12 . The grouting injection portion can be extended by the first injection portion re-filling 14, and rotational penetration is repeatedly performed to the required position (B to D).

The portion of the casing ream 31 which is disturbed by the spiral blade 12 by the casing ream 31 or 81 and filled with grouting in the course of penetration of the steel pipe file 11 by the rotation of the spiral wing 12, (B to D) while expanding the disturbance zone to the range of the rotation diameter.

At this time, when the casing reamer 31 is pulled to a certain extent of the ground 61 (when the ground 61 in which the steel pipe casing 41 can be inserted is secured), the steel pipe casing 41 is expanded (C).

D process, the upper side of the foundation foundation 61 forms a foundation concrete 91 layer to finish the basic foundation of the soft foundation.

In order to strengthen the reinforcement strength before forming the base concrete layer 91, a process of pulling the steel bar 51 of FIG. 5 into the steel pipe 11 and filling the empty space with the grouting material may be added.

FIG. 11 is a construction flowchart using the spiral steel pipe file of FIG. 7. FIG.

(A), the spiral steel pipe pile 70 is rotated, and the spiral blade 12 is pulled downward while rotating and disturbing the ground 61.

At this time, the ground disturbed by the rotation of the helical blade 12 is formed with a disturbance region along the rotation path of the helical blade 12, and the grouting injection is performed by the first grouting jet opening 13 formed at the end of the helical blade 12 . The grouting injection portion can be extended by the first injection portion re-filling 14, and rotational penetration is repeatedly performed to the required position (B to D).

By the second injection part reamer 72 for reinforcing the peripheral portion of the steel pipe file 11 in which the spiral blade 12 is not formed in the course of the steel pipe file 11 being penetrated by the rotation of the spiral wing 12, And expanded in the downward direction (B to D) while expanding the portion filled with grouting by being disturbed by the wing 12.

The ground region expanded by the second injection portion reamer 72 is filled with the grouting material while the grouting material is continuously injected.

D process, the upper side of the foundation foundation 61 forms a foundation concrete 91 layer to finish the basic foundation of the soft foundation.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, As will be understood by those skilled in the art. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

10, 20, 30, 40, 50: Spiral steel pipe file
11, 21: Steel pipe file 12, 22: Spiral wing
13, 23: first grouting jet port 14: first injection port
14a: front end side 14b: distal end side
15a, 15b: grouting filling 31, 81: casing widening
41: steel pipe casing 51: steel bar
61: ground 71: second grouting outlet
72: second injection portion reaming 82:
91: Basic concrete

Claims (7)

A steel pipe file having a cylindrical shape and having a pointed end so as to be able to be installed by perforation,
At least one spiral blade formed at a lower end of the steel pipe and spaced apart from the steel pipe by a predetermined distance and rotating the steel pipe while disturbing the ground by rotation,
A grooved portion formed on an outer circumferential surface of the steel pipe and formed on a rear end of the end of the helical wing with respect to a rotation direction of the helical wing so as to spout grout on the gap portion of the ground disturbed along the rotation path of the helical wing; A first grouting jet port,
Wherein the first and second injection portions are inclined upwardly and downwardly with respect to the rotation direction of the helical blade and are inclined from the initial end to the distal end. The method according to claim 1,
Wherein a casing extension is formed on both sides of the outer circumferential surface of the steel pipe file, the casing extension being a ground expansion blade for reinforcing the ground disturbed by the spiral wing at an upper side of the spiral wing formed at the uppermost end. The method according to claim 1,
A casing extending in the form of a ground expanding vane plate is further formed on an outer circumferential surface of the steel pipe file above the spiral wing,
Wherein the steel pipe casing is inserted and mounted in an area expanded by the casing extension. The method according to claim 1,
Reinforced steel pipe is inserted into the inner diameter side of the steel pipe file. The method according to claim 1,
Wherein one end of the helical wing is in contact with the helical wing and the other side of the helical wing is in contact with the outer circumferential surface of the steel pipe,
The first injection portion enlargement has the form of a triangular pyramid,
Wherein the leading end side is a vertex point and the distal end side is a triangular surface with respect to the rotational direction of the helical wing. delete The method according to claim 1,
A second grouting jet port is formed on one side of the steel pipe filament on the upper side where the helical wings are formed and a second injection port enlargement forming the ground for injecting the grouting material jetted from the second grouting jet port is further formed , Grouting reinforcement spiral steel pipe file.

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