KR20120034432A - Grouting apparatus for direct-boring and grouting method using that - Google Patents

Abstract

PURPOSE: A direct-perforated steel pipe multi-stage grouting device for inserting 12m steel pipes with a top hammer and a method for grouting using the same are provided to install steel pipes in relatively hard soil layer and various heights and minimize working time and man-hour for installing the steel pipes. CONSTITUTION: A direct-perforated steel pipe multi-stage grouting device for inserting 12m steel pipes with a top hammer(100) comprises a vehicle, a boom unit(120), and a perforation unit(130). The boom unit is installed in the vehicle and controls working position of the perforation unit. The boom unit comprises a draw-out unit(121) and a swing table(125). The draw-out unit is installed to be adjusted length. The swing table is rotatably installed in the end of the draw-out unit. The perforation unit comprises a base(131), a movement support(141), a head(161), an extension rod, and a perforation(171). The base is installed in the swing table of the boom unit and the movement support is installed to be moved forth and back along the base. The perforation unit is installed in the end of the extension road to perforate the ground with the power supplied from the head.

Description

Multi-stage grouting device for direct hole steel pipe for inserting 12m single-bone steel pipe using top hammer and grouting method using same {Grouting apparatus for direct-boring and grouting method using that}

The present invention relates to a multi-stage grouting apparatus for direct drilling steel pipes and a grouting method using the same for inserting a 12m single-bone steel pipe using a top hammer, and more particularly, by inserting a 12m single-bone steel pipe at the same time as drilling, minimizing ground disturbance and reducing work time and labor. The present invention relates to a multi-stage grouting device for direct drilling steel pipe for inserting a 12m single-bone steel pipe using a short hammer, and a grouting method using the same.

In general, when digging underground or slope in the form of tunnels, it is necessary to provide stress to the ground around the excavation site prior to tunnel excavation. Pre-fire the soil of the excavated ground by arranging the pipe (steel pipe) in the form of arch or rafters, and then allowing the grout material to penetrate into the strata through the non-return valve formed evenly over the pipe and all parts of the pipe. Subsidiary construction methods such as so-called steel pipe reinforcement multi-stage grouting method, pipe roop method, or Reinforced Protective Umbrella Method (RPUM) that enable stabilization of pre-membrane grounds are registered in Korean Patent No. 166423 , 182613 and 392931 and the like.

In addition, the various auxiliary methods and the like are based on a so-called poprepoling method, which drills holes in the soft ground and injects and solidifies stabilizers thereto.

According to the conventional auxiliary method by using the drilling equipment on the membrane surface for the construction of the tunnel, the installation of the steel pipe (P) of the appropriate diameter in addition to the drilling work, and then injecting grout material (G) through the steel pipe to solidify the ground As a result, the steel pipe (P) and the ground are integrated and the load or earth pressure that can be applied to the tunnel is dispersed or reduced by the action of the beam formed by the steel pipe and the surrounding ground. In the case of using the light, the order effect and the reinforcement effect can be obtained at the same time.

Therefore, the steel pipe reinforcement multi-stage grouting method, pipe loop method, or protective umbrella net method (hereinafter referred to as "pipe loop method") alleviate the loosening area of the ground and increase the shear strength of the soil and rock. It is recognized as a very advantageous method in terms of economy and economics, and is widely adopted as an auxiliary means of various civil works.

Conventionally disclosed direct drilling equipment is a drill operation by inserting a rod equipped with a hammer in a casing at a place outside of the equipment in the preparation step for drilling, and then mounted on the equipment, respectively, after the drilling is completed It is a structure that separates the rod and inserts the rod into the newly prepared casing to perform the next drilling operation.

Conventionally, when installing the steel pipes along the up and down direction, it was necessary to match the height of the support surface for supporting the housing for inserting the steel pipe corresponding to each steel pipe mounting height, excavation work to sequentially excavate the support surface according to the insertion height of the pile Should be done at the same time or had to install a separate support to adjust the height, this caused a problem that the labor time is increased and work time is delayed.

In particular, conventional direct drilling steel pipe multi-stage drilling equipment can be drilled where the ground structure is composed of earth and sand, but when the ground structure is composed of stone layers or rock layers, the construction speed becomes much slower and the construction is delayed in the hard rock ionizing layer. There is a problem that the construction period is extended. In particular, when using a pneumatic hammer 3.5inch ahammer is installed because there is a problem that rock drilling is difficult in the multi-stage method of the direct hole steel pipe having a diameter of 5 inches.

The present invention was created in order to solve the above problems, it is possible to install a direct perforated steel pipe in the soil layer of relatively solid soil, and a multi-stage perforated steel pipe for inserting a 12m single-bone steel pipe using a top hammer easy to install steel pipes for various installation heights It is an object of the present invention to provide a grouting device and a grouting method using the same.

12m single-hole steel pipe multi-stage grouting device for inserting 12m single-bone steel pipe using the top hammer according to the present invention for achieving the above object is provided with a vehicle, a boom unit installed in the vehicle, and a drilling unit installed in the boom unit, One end of the boom unit is rotatably installed on the vehicle so that the other end can rotate in the vertical direction, and the other end of the boom unit is rotatably installed around the rotation axis extending in the vertical direction so that the drilling unit can be installed. The punching unit includes a base unit installed in the boom unit, a movable support unit slidably moved forward and backward along the base unit, a head unit installed in the movable support unit, and installed and inserted into the head unit. An extension rod extending through the inside of the steel pipe and having an inner circumferential hollow, and installed at an end of the extension rod; A perforated part having a drainage hole communicating with the hollow of the extension rod, and a rotary joint connected to an injection pipe connected to the discharge water inlet to supply the discharged water to the hollow; And moving means for moving the moving support part along the base part.

The drilling portion is installed at the end of the extension rod and the pilot bit penetrating the steel pipe, the casing shoe coupled to the end of the steel pipe and the inner peripheral surface to support the pilot bit to rotate and retract, the outside of the steel pipe It is preferable to include a ring bit fastened to the pilot bit and boring the ground while moving forward and backward integrally with the pilot bit.

The pilot bit is formed to strike the rear end of the casing shoe coupled with the steel pipe to the front in the process of advancing back and forth for the drilling, the insertion direction of the steel pipe is inserted It is preferable to further include an auxiliary guide pipe mounted on the outside of the steel pipe so as to improve the straightness and corresponding to the diameter of the hole drilled by the ring bit.

The grouting method using a 12m single-hole steel pipe insertion direct pipe steel pipe multi-stage grouting device using a top hammer to achieve the above object is a steel pipe mounting step of mounting the steel pipe to the drilling unit so that the extension rod of the drilling unit penetrates the inside, and the steel pipe A drilling unit moving step of driving the boom unit to move the mounted drilling unit to a drilling position, a drilling step of drilling ground through a drilling unit installed at an end of the extension rod, and a process of drilling by the drilling unit And an ejecting step of discharging the by-product generated from the outside, and inserting the steel pipe into the punched hole in the process of hitting the punching part for drilling.

Before performing the drilling step may further include an auxiliary guide tube mounting step of installing an auxiliary guide pipe on the outer circumferential surface of the steel pipe to increase the straightness when the steel pipe is inserted.

12m single-hole steel pipe insert using a top hammer according to the present invention multi-stage grouting device and a grouting method using the same can be installed in a straight pipe even in a relatively solid soil layer and can be easily installed in different heights, steel pipes There is an advantage that can minimize the labor and work time according to the installation.

In addition, since the top hammer is used during the drilling operation, sludge can be discharged into the water without air, thereby minimizing the deterioration of the working environment due to the dust generated during the operation.

Figure 1 is a side view showing a straight hole steel pipe multi-stage grouting device for inserting 12m single-bone steel pipe using a top hammer according to the present invention,
Figure 2 is a perspective view of the perforation unit of Figure 1,
Figure 3 is a partially cut perspective view showing the drive unit of the drilling unit of Figure 2,
Figure 4 is an exploded perspective view showing a perforation of the perforation unit of Figure 2,
5 is a cross-sectional view showing an insertion state of the perforated part and the steel pipe of FIG.
6 is a cross-sectional view showing another embodiment of the perforation;
7 is a cross-sectional view showing another embodiment of the perforation;
Figure 8 is a side view showing a state in which the steel pipe is inserted by adjusting the height,
FIG. 9 is a plan view of a 12 m single-hole steel pipe multi-stage grouting device for inserting a 12m single-bone steel pipe using the top hammer of FIG. 1.

Hereinafter, with reference to the accompanying drawings will be described in more detail the 12m single-hole steel pipe inserting direct-hole steel pipe multi-stage grouting device (hereinafter referred to as the 'grouting device') and the grouting method using the same according to the present invention with reference to the accompanying drawings.

1 to 9 show one preferred embodiment of the grouting device 100 according to the invention.

Referring to the drawings, the grouting apparatus 100 includes a vehicle, a boom unit 120 installed in the vehicle, and a drilling unit 130 installed in the boom unit 120.

The vehicle includes a main body 111, a wheel 112, and a hydraulic drive unit 113, which is generally the same as a vehicle used for a perforator or an excavator. Wheel 112 has been applied to the caterpillar, the hydraulic drive unit 113 provides a driving force for driving the cylinder or hydraulic motor used for the drive of the boom unit 120 and the drilling unit 130 to be described later.

The boom unit 120 is for adjusting the working position of the punching unit 130, the length of the drawer 121 is adjustable and the swing table 125 rotatably installed at the end of the drawer 121 Equipped.

The lead portion 121 has a first boom 122, one end of which is rotatably installed in the vehicle, a second boom 123 and a second boom 123 provided to be pulled out and pulled out from the first boom 122. ) Is provided with a third boom 124 installed to be withdrawn and withdrawn. The number of the boom can be adjusted in various ways as needed.

The first boom 122 is rotated about the coupling portion coupled to the vehicle by the hydraulic cylinder to adjust the end height of the third boom 124.

The swing table 125 is installed at the end of the third boom 124, it is possible to rotate around the axis of rotation extending in the vertical direction. The swing table 125 may be rotated by a cylinder, and may be formed to be driven by a driven gear installed on a rotating shaft and a drive gear that is rotated by a motor and engaged with the driven gear.

The drilling unit 130 includes a base part 131 installed on the swing table 125 of the boom unit 120, a moving support part 141 installed to be slidable in the front-rear direction along the base part 131, and The head 161 supported by this moving support part 141, the extension rod 162 driven by the head 161 and extending along the longitudinal direction of the base part 131, and this extension rod 162 The perforation part 161 which is cut off at the end part is provided.

The base portion 131 is rotatably installed on the swing table 125, and guides the retraction direction so that the moving support part 141, which will be described later, moves forward and backward along the front and rear directions. The base part 131 includes a lower plate 134 coupled to the swing table 125, a connecting plate 133 extending upward from the lower plate 134, and an upper plate formed at an upper end of the connecting plate 133. 132 and has an H beam shape as a whole.

The moving support part 141 is supported on the upper plate 132 to slide in the longitudinal direction of the base part 131, and may be moved forward and backward by the moving means 151. In the present exemplary embodiment, the movable support 141 is slidingly driven on the upper plate 132, but additional guide rails are further provided on the upper plate 132 and the movable support 141 so that the movable support 141 can be easily moved in and out. It may be provided.

The moving unit 151 connects the drive motor 152, the first to fourth sprockets 153 to 156 that are rotated by the drive motor 152, and the first and second sprockets 153 and 154. And a second chain 158 connecting the first chain 157, the third and fourth sprockets 155 and 156.

The drive motor 152 is mounted to the rear of the base portion 131, the first sprocket 153 is mounted to the drive shaft of the drive motor 152 so as to rotate integrally, the second sprocket 154 Is rotatably installed on the rotating shaft provided on the rear side of the intermediate plate. The first and second sprockets 153 and 154 are connected to allow power transmission through the first chain 157 as described above.

The third sprocket 155 is installed on the same rotation shaft as the second sprocket 154, so that when the second sprocket 154 rotates under the rotational force through the first sprocket 153, rotation can be made together. In addition, the fourth sprocket 156 is installed in a state spaced apart from the third sprocket 155 in front of the base portion 131, and the second chain 158 transfers power to the third and fourth sprockets 155 and 156 mutually. It is hung up to make the connection possible.

The movement supporting part 141 is formed in a shape in which both ends can grip both ends of the upper plate 132, and the sliding support 141 is slidable along the longitudinal direction of the upper plate 132. One side of the moving support part 141 is connected to the second chain 158 so that the second chain 158 travels together with the second chain 158 when the second chain 158 travels between the third and fourth sprockets 155 and 156. Is connected to make. Although not shown, an idle sprocket for maintaining the tension of the second chain 158 may be installed between the third and fourth sprockets 155 and 156 having a long separation distance.

In this embodiment, the chain connection method is used as the moving means 151 for moving the moving support part 141 in the front and rear directions of the base part 131. Alternatively, the chain connection method is moved by a hydraulic / pneumatic cylinder or a screw type actuator. The moving unit 151 may be formed to allow the support 141 to slide.

The head 161 is installed on the upper part of the moving support part 141 so as to slide together with the moving support part 141. The head 161 is the same as that used in a general punching machine, and a vibrator and a motor are built in to apply the vibration and rotational force to the punching unit 161.

The extension rod 162 extends from the head 161 and transmits power to the drilling portion 161, and has a diameter smaller than the inner diameter of the steel pipe 10 so as to extend through the interior of the steel pipe 10. In addition, the extension rod 162 has a hollow 163 is formed so that the discharge water can be supplied therein.

In addition, the end of the extension rod 162 is connected to the head 161 is connected via a support shaft, the rotary joint 167 is provided to give the Siebel function to the outer peripheral surface of the support shaft. The rotary joint 167 is provided with an injection pipe 168 connected to the discharge water injection device, and a check valve 169 is installed in the injection pipe 168. This is to facilitate the workability by drawing the sludge generated during the drilling process to the outside of the drilling hole through the discharged water. The discharged water introduced into the rotary joint 167 is discharged to the outside by moving through the inner hollow 163 of the extension rod 162 to the perforated part 161 where the perforation is made, and the discharged discharged water together with the sludge generated in the perforating process. Along the outer circumferential surface of the steel pipe 10 is discharged to the outside of the drilling hole to discharge the sludge.

 Unlike the present embodiment, the extension rod 162 may be formed in a screw shape as shown in FIG. 7 so that sludges may be transferred to the outside by the rotation of the extension rod 162 during the excavation process.

As shown in the figure, the movable support 141 and the base 131 are provided with first and second steel pipe supports 165 and 166 for supporting the steel pipe 10 in a horizontal state. The first steel pipe support 165 supports one end of the steel pipe 10 and presses the steel pipe 10 when the moving support part 141 moves to the end side of the base part 131 by the moving means 151. Steel pipe 10 is to be able to move forward with the moving support (141). And the second steel pipe support 166 is fixed to the upper surface of the base portion 131, and supports the steel pipe 10 so that the steel pipe 10 can be maintained in a horizontal state.

The drilling portion 161 is installed at the end of the extension rod 162 to excavate the soil, the pilot bit 171, the ring bit 175 is fastened to the pilot bit 171, and the end of the steel pipe 10 It includes a casing shoe 178 welded to.

The pilot bit 171 is connected to the end of the extension rod 162, the drain hole 172 communicated with the hollow 163 of the extension rod 162 is formed to communicate with the outside through the front surface.

The ring bit 175 is fastened to the pilot bit 171 and has a fastening hole 176 penetrating the front and rear surfaces so that the pilot bit 171 can be inserted therein.

The pilot bit 171 is provided with a coupling groove 173 extending in the circumferential direction and spaced apart from each other in the front-rear direction on the outer circumferential surface, extending in the front-rear direction, and inserted into the same depth as the coupling groove 173. Groove 174 is formed. Three insertion grooves 174 are formed spaced at equal intervals along the circumferential direction, and the coupling groove 173 communicates with an insertion groove 174 adjacent to one side and the other insertion groove 174 adjacent to the other. It is formed to be closed.

The ring bit 175 is provided with a plurality of coupling protrusions 177 protruding inward on an inner circumferential surface thereof. These coupling protrusions 177 are fastened to the coupling groove 173, two rows in the front and rear direction, and like the insertion groove 174, three are formed at equal intervals along the circumferential direction.

When the pilot bit 171 and the ring bit 175 are fastened to each other, the coupling protrusions 177 correspond to the insertion grooves 174, and then the pilot bits 171 are pushed through the fastening holes 176. Then, the pilot bit 171 and the ring bit 175 are fastened by rotating the pilot bit 171 so that the coupling protrusions 177 may be fastened to the coupling groove 173. On the contrary, when the pilot bit 171 and the ring bit 175 are separated, the pilot bit 171 is rotated so that the coupling protrusion 177 is positioned in the insertion groove 174, and then the pilot bit 171 is ring ring 175. Towed away from each other.

The direction in which the coupling protrusion 177 rotates to be coupled to the coupling groove 173 is the same as the rotation direction in which the extension rod 162 rotates during the excavation process, and the pilot bit 171 rotates only in one direction during the excavation operation. Since the coupling protrusion 177 is continuously inserted into the coupling groove 173, the ring bit 175 is rotated and retracted integrally with the pilot bit 171.

The casing shoe 178 is welded with a part inserted into an end portion of the steel pipe 10, and an end of the casing shoe 178 inserted into the steel pipe 10 may be pilot bit 171 to move forward. It is supposed to take time. The inner circumferential surface of the casing shoe 178 is in contact with the outer circumferential surface of the pilot bit 171 so that the pilot bit 171 may be rotated without interfering with the steel pipe 10.

Insertion process of the steel pipe 10 by the horizontal drilling device described above is as follows.

The casing shoe 178 is welded to the end of the steel pipe 10, and the steel pipe 10 is fastened so that the pilot bit 171 and the extension rod 162 are embedded therein. The pilot bit 171 is exposed to the outside through the end of the steel pipe 10 is installed casing shoe 178, and then the ring bit 175 is fastened to the pilot bit 171.

Thereafter, the drilling unit 130 is positioned in the drilling target portion, and then the steel pipe 10 is inserted into the drilled hole while performing the drilling through the front and rear vibration and rotation by the driving force provided from the head 161. The steel pipe 10 is towed forward together with the casing shoe 178 as the pilot bit 171 hits the casing shoe 178 forward in the course of the pilot bit 171 vibrating in the front and rear direction, the pilot bit When the traction force due to the impact of the 171 is not sufficient, the moving support 141 is inserted while the steel pipe 10 is moved forward through the transfer force forward by the moving means 151.

Through this process, the drilling and the insertion of the steel pipe 10 proceeds, and after the insertion of the steel pipe 10 so that the ends of the drilling part 161 and the steel pipe 10 are exposed through the opposite side of the drilling target ring ring ( 175 is separated from the pilot bit 171, the ring bit 175 and the extension rod 162 is withdrawn from the steel pipe 10, then the casing shoe 178 is cut off the end of the welded steel pipe (10) This completes the insertion of the steel pipe (10).

The drilling portion 161 may further include an auxiliary guide pipe 179 installed outside the end of the steel pipe 10 as shown in FIG.

When the blue hole is made by the pilot bit 171 and the ring bit 175, the diameter of the hole to be drilled is drilled a little larger than the diameter of the steel pipe 10, the steel pipe (10) The straightness of the steel pipe 10 in the horizontal direction may be deteriorated because it is supported by the lower side of the drilling hole. Therefore, the auxiliary guide pipe 179 having an outer diameter corresponding to the diameter of the hole to be drilled is mounted outside the end of the steel pipe 10 so that the steel pipe 10 to be inserted during the drilling and the insertion of the steel pipe 10 is in a horizontal state. Keep it inserted.

Grouting device 100 according to the present invention having the above configuration can be freely set the working position of the drilling unit 130 by the boom unit 120 to perform the drilling work at various heights and positions in a fixed state of the vehicle Work time can be shortened.

The grouting method (hereinafter referred to as the 'groting method') using the 12m single-hole steel pipe multi-stage grouting device 100 for inserting the top hammer according to the present invention is an extension rod 162 of the drilling unit 130. Steel pipe mounting step for mounting the steel pipe 10 to the drilling unit 130 to penetrate, and the drilling unit for driving the boom unit 120 to move the drilling unit 130 equipped with the steel pipe 10 to the drilling position A moving step, a drilling step of drilling the ground through the drilling unit 161 installed at the end of the extension rod 162, and a discharge step of discharging the by-products generated in the process of drilling by the drilling unit 161 to the outside And an insertion step of inserting the steel pipe 10 into the perforated hole in the process of hitting the perforation part 161.

Mounting the steel pipe 10 to be inserted into the ground on the extension rod 162 of the grouting device 100 and then adjust the boom unit 120 to position the drilling unit 130 to the drilling point. The working point of the drilling unit 130 is set by rotating the first boom stand 122 and adjusting the outgoing length from which the second boom stand 123 and the third boom stand 124 are drawn out from the first boom stand 122. . When performing the drilling at a low position as shown in Figure 9 by rotating the vehicle to one side so that the drilling unit 130 does not interfere with the vehicle can lower the drilling unit 130 to the position close to the ground.

It can be seen that the drilling step and the discharge step and the insertion step are performed at substantially the same time. In the process of advancing the perforation part 161 and the extension rod 162 for drilling, the steel pipe 10 is also inserted into the hole to insert and install the steel pipe 10.

The grouting method is the outer peripheral surface of the steel pipe 10 to the auxiliary guide pipe 179 to increase the straightness when inserting the steel pipe 10 as described above before the installation step of the steel pipe 10 to install the steel pipe 10 Auxiliary guide pipe 179 to be installed in may further comprise the step of mounting.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100; Multi-Stage Grouting Device for Direct Hole Steel Pipe Inserting 12m Single-Band Steel Pipe Using Top Hammer
110; vehicle
120; Boom unit
130; Drilling Unit
131; Base portion 141; Moving support
151; Vehicle 161; head
162; Extension rod 171; Perforation

Claims (6)

A vehicle;
A boom unit installed in the vehicle;
And a punching unit installed in the boom unit.
The boom unit may be rotatably installed at one end of the boom unit so that the other end may rotate in the up and down direction, and the drawer may adjust the takeout length, and the up and down direction may be installed at the other end of the takeout unit. It includes a swing table rotatably installed about an extended axis of rotation,
The drilling unit is the base portion is installed on the boom unit;
A moving support part slidably installed in the front and rear directions along the base part;
A head part provided at the moving support part;
An extension rod extending through an inside of the steel pipe to be inserted into and inserted into the head and having an inner circumferential hollow;
A perforation part installed at an end of the extension rod and boring the ground by the power transmitted from the head and having a drain hole communicating with the hollow of the extension rod;
A rotary joint connected to an injection pipe connected to the discharge water injection unit to supply the discharge water to the hollow;
12-m single-ended steel pipe multi-stage grouting device for inserting a 12m single-bone steel pipe using a top hammer, characterized in that it comprises a moving means for moving the moving support along the base. The method of claim 1,
The drilling portion is installed at the end of the extension rod and the pilot bit penetrating the steel pipe, the casing shoe coupled to the end of the steel pipe and the inner peripheral surface to support the pilot bit to rotate and retract, the outside of the steel pipe The multi-stage grouting device for inserting a 12m single-bone steel pipe using a top hammer, characterized in that it comprises a ring bit fastened to a pilot bit and boring the ground while advancing and rotating integrally with the pilot bit. The method of claim 2,
The pilot bit is 12m short using a top hammer, characterized in that the front end of the casing shoe coupled with the steel pipe to be moved forward to the front to pull the steel pipe forward in the process of advancing in the front and rear direction for drilling Direct pipe steel pipe multi-stage grouting device for steel pipe insertion. The method according to any one of claims 2 or 3,
12m using the top hammer, characterized in that it further comprises an auxiliary guide tube mounted on the outside of the steel pipe to the straightness of the insertion direction is inserted into the steel pipe corresponding to the diameter of the hole drilled by the ring bit Direct drilling steel pipe multi-stage grouting device for inserting single-bone steel pipe. A steel pipe mounting step of attaching the steel pipe to the drilling unit so that the extension rod of the drilling unit passes therethrough;
A drilling unit moving step of driving the boom unit to move the drilling unit equipped with the steel pipe to the drilling position;
A perforating step of perforating the ground through a perforation provided at an end of the extension rod;
A discharge step of discharging the by-products generated in the process of drilling by the perforator to the outside;
The grouting method using a 12-m single-ended steel pipe multi-stage grouting device for inserting a 12m single-bone steel pipe using a top hammer, characterized in that the inserting step of inserting the steel pipe into the punched hole in the process of hitting the punched portion. 6. The method of claim 5,
Before the drilling step is inserted into the 12m single-bone steel pipe insert using a top hammer, characterized in that further comprising the step of installing the auxiliary guide pipe for installing the auxiliary guide pipe on the outer circumferential surface of the steel pipe to increase the straightness when the steel pipe is inserted Grouting method using perforated steel pipe multi-stage grouting device.

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