KR200362093Y1 - An agitating device for improving ground - Google Patents

Abstract

The present invention relates to an agitator for improving soil, wherein a high binder supply pipe is formed in the axle shaft in the axial direction, and an agitator blade is provided in the middle of the outer peripheral surface of the auger shaft. After extending as long as, a hollow cylindrical receiving portion is formed at the lower end of the elongated opening, an air supply pipe and a water supply pipe are formed in the auger shaft in parallel with the high drug supply pipe, and the inside of the receiving part is connected to the high drug supply pipe. A water supply pipe connected to the high drug supply pipe and the water supply pipe is formed to the vicinity of the distal end of the receiving portion, and a high pressure jet port for high drug discharge connected to the high drug supply pipe is connected to the outer peripheral surface of the tip of the accommodation portion and a water jet is connected to the water supply pipe. The high pressure injection port is formed, and the inside of the receiving portion is provided with a predetermined coupling means. Excavation hammer is coupled to the air supply pipe in succession, a conveying screw is formed on the outer peripheral surface of the auger shaft and the receiving portion, the air discharge hole is formed in the bottom of the hammer bit provided at the tip of the excavation hammer to the side to the air discharge hole It is a configuration in which a high pressure injection port for air blowing is formed to the outer peripheral surface of the hammer bit in succession.

Description

Ground Agitation System {AN AGITATING DEVICE FOR IMPROVING GROUND}

The present invention relates to an agitator for improving the ground, and more specifically, to a rock formation layer of weathered rock, soft rock, granite, etc., or a stone layer such as amber stone, which is present in the ground to be improved, by quickly crushing and excavating without a digging wing. It relates to a ground improvement agitating device configured to make an improved object in which the ground to be improved is stirred and mixed.

In general, when constructing a structure directly on the ground, if the ground is soft ground composed of soft soil such as sea viscous clay and stratified clay soil, the ground is improved and reinforced, and the river, reservoir, embankment, In the case of requiring landfills such as landfills, vertical walls are being formed in the ground.

The ground improvement stirring device used for the soft ground improvement and the vertical order wall is usually inserted into the ground to the desired depth of the auger shaft, and the high binders such as cement paste, solidified material during the excavation and drawing of the auger shaft ( Iii) is sprayed through the improver ejection opening formed at the tip of the auger shaft, and mixed and stirred the improved soil and the high binder to improve the soft ground or form a cast-order wall.

However, in digging into the ground to be improved, when rock layers such as weathered rock and soft rock or stony layers such as amber stones exist in the ground to be improved, such rock layers or stone layers must be dug into and improved.

In the conventional ground improvement stirring apparatus disclosed in Korean Utility Model Model Publication No. 20-0317286 filed by the applicant and published on June 10, 2003, a high drug supply pipe is formed in the axle shaft in the axial direction. The stirring blade is installed in the middle of the outer circumferential surface of the auger shaft, and the front end of the auger shaft extends downward by a predetermined length, and a hollow cylindrical accommodating part is formed at the extended front end, and a hollow cylindrical accommodating part is formed inside the accommodating part. A high drug supply pipe connected in series with the high drug supply pipe is formed to the vicinity of the distal end of the accommodating part, an air supply pipe is formed inside the auger shaft in parallel with the high drug supply pipe, and a predetermined coupling means is known inside the container. Excavation hammer is coupled to the air supply pipe in series, the auger shaft and the outer peripheral surface of the receiving portion is conveyed A screw is formed, and an excavation blade is disposed on the outer peripheral surface of the distal end of the accommodating portion, and a high dispensing spout is formed in the excavating blade in communication with the high dispensing agent supply pipe.

However, according to the conventional ground improvement stirring device, the ground to be drilled primarily by the hammer bit is excavated secondarily by the drilling bit of the drilling blade having a diameter larger than that of the hammer bit, but the drilling wing having the same diameter as the stirring wing. Is the edge of the ground to be improved primarily drilled by the hammer bit, that is, the ground to be improved between the diameter of the hammer bit and the diameter of the drilling blade, and the excavation bit of the excavation head is a rock layer. In addition, because the friction in the rock layer or the rock layer while rotating in contact with the stone layer is applied to the excavation wing to force the excavation wing is damaged, there is a problem that often replaces the excavation wing.

The present invention has been made to solve the above problems, without breaking the excavation rock bed or rock layer in the ground to be excavated quickly to make the improved mixture of the high-concentration agent and the ground to be sufficiently stirred to the required depth. It is an object of the present invention to provide a grounding agitating device in which an excavation hammer is mounted at the tip of the auger shaft and a high pressure injection hole is formed on an outer circumferential surface of the excavation hammer.

1 is a cross-sectional view of the combined ground stirring device according to the present invention,

Figure 2 is an exploded cross-sectional view of the ground improvement stirring device according to the present invention,

3 is an enlarged cross-sectional view of a pneumatic drilling hammer as an excavation hammer mounted on the tip of the auger shaft of the ground improvement stirring device according to the present invention,

4 is a perspective view of an inner cylinder of the components constituting the pneumatic drilling hammer of FIG. 3, and

5 is a perspective view of a hammer bit of the components constituting the pneumatic drilling hammer of FIG.

The ground improvement stirring device of the present invention for achieving the above object of the present invention, a high binder supply pipe is formed in the axial direction in the interior of the auger shaft, as a ground improvement agitator provided with a stirring blade in the middle of the outer peripheral surface of the auger shaft And, after the front end of the auger shaft extends downward by a predetermined length, a hollow cylindrical receiving portion having a lower opening is formed on the extended front end, the air supply pipe and the water supply pipe in the auger shaft in parallel with the high binder supply pipe And a high feed agent supply pipe connected to the high feed agent supply pipe and a water supply support pipe connected to the water supply pipe to the vicinity of the tip of the receiving part, and the high feed agent supply pipe is formed on the outer peripheral surface of the receiving part. A high pressure jet for ejecting a high drug agent and a water supply pipe A high pressure jet for ejecting water is formed, and a well-known excavation hammer is connected to the air supply pipe in series by a predetermined coupling means inside the accommodating portion, and a conveying screw is formed on the outer circumferential surface of the auger shaft and the accommodating portion, An air discharge hole is formed downward in the hammer bit provided at the tip of the excavation hammer, but a high pressure injection hole for ejecting air to the outer circumferential surface of the hammer bit is connected to the air discharge hole laterally.

Hereinafter, an embodiment of the ground improvement stirring device according to the present invention will be described in detail with reference to the drawings. In the ground improvement stirring device according to the present invention, the same components as those of the prior art will be omitted.

As shown in Figures 1 to 3, in the ground improvement stirring apparatus according to the present invention, a hollow cylindrical receiving portion 110 is formed at the tip of the auger shaft 21, this hollow cylindrical receiving portion 110 The well-known drilling hammer 200 is mounted on the outer peripheral surface of the distal end of the accommodating part 110, and a high-pressure injection hole 150 for spraying water and a high-pressure injection hole 160 for water jet are formed. The high pressure injection port 226 for blowing the air is formed on the side of the hammer bit 220.

The basic configuration of the auger shaft 21 in the ground improvement stirring device is composed of a high binder supply pipe (21a) and the stirring blade (23). The high binder supply pipe 21a is formed axially inside the auger shaft 21, and the stirring blade 23 is provided in the outer peripheral surface of the auger shaft 21. As shown in FIG.

In this embodiment, after the front end of the auger shaft 21 extends downward by a predetermined length, a hollow cylindrical accommodating portion 110 is formed in the extended front end thereof with its lower portion opened. The inside of the accommodating part 110 is provided with the high caking drug supply pipe 111 connected to the high caking drug supply pipe 21a of the auger shaft 21 to the vicinity of the front end of the accommodating part 110.

In addition, the air supply pipe 120 is formed inside the auger shaft 21 in parallel with the high drug supply pipe 21a.

In addition, a female screw portion 115 is formed in the upper inner center of the accommodating portion 110 so as to be connected to the air supply pipe 120 of the auger shaft 21. The male screw portion 216a is formed at the rear end of the drilling hammer 200 as described in detail below. The female screw portion 115 of the receiving portion 110 and the male screw portion 216a of the drilling hammer 200 function as coupling means for coupling the receiving portion 110 and the drilling hammer 200 to each other. It will be appreciated that any other coupling means is possible without being limited thereto.

In addition, a water supply pipe 21b is formed inside the auger shaft 21 in parallel with the high binder supply pipe 21a and the air supply pipe 120. Inside the accommodating part 110, a water supply pipe 112 is connected to the water supply pipe 21b of the auger shaft 21 to the vicinity of the tip of the accommodating part 110.

In addition, the outer peripheral surface of the front end of the accommodating part 110 is formed with a high-pressure injection port 150 for jetting the high drug injection in communication with the high-feed agent supply pipe 111 and the high-pressure injection port 160 for water jet in communication with the water supply pipe 112. It is.

According to this configuration, when the auger shaft 21 digs downwardly the soil to be improved while rotating clockwise when viewed from above, the water is supplied at a high pressure through the water supply pipe 112 and the high pressure jet for water jet 160. When it is sprayed to soften the soil to be improved, and the auger shaft 21 rotates counterclockwise as seen from above, and is drawn out of the soil to be improved, the high binder supply pipe 111 and the high pressure jet for ejecting the high binder ( 150) is sprayed with a high binder to be mixed with the soil to be improved.

Excavation hammer 200 coupled to the receiving portion 110 formed on the tip of the auger shaft 21 is known, in this embodiment is illustrated as using a pneumatic drilling hammer 200 as an excavation hammer, hydraulic drilling A hammer, an electric drilling hammer, or the like may be applied.

As shown in detail in FIG. 3, the pneumatic drilling hammer 200 includes a sleeve 210 into which compressed air is introduced through an air inlet hole 216b of a coupling head 216 fitted to a rear end thereof, and an air inlet hole ( Check valve 280 for selectively opening and closing the check end 216c formed in the coupling head 216 by the action of the compressed air and spring 182 introduced through the 216b, the check valve 280 is in the longitudinal direction A valve chest 270 having a valve guide portion 272 mounted to be slidably and having a plurality of recess grooves 274 through which compressed air passes, and a valve 260 fitted to an outer circumferential surface of the rear end thereof. In the circumferential direction, the valve seat 250 in which a plurality of circumferential holes 254 are formed and the compressed air introduced along the outer circumferential surface of the valve seat 250 slide in the longitudinal direction along the inner wall of the sleeve 210. A piston 230 that is movably mounted, the piston The rear end portion 233 of the 230 is a rock layer formed by a plurality of protrusions 222 of the inner end 240 while the inner cylinder 240 is slidably embedded, and the piston 230 is repeatedly moved along the longitudinal direction. The hammer bit 220 to strike the strike, and the chuck 212 is coupled to the front end of the sleeve 210 to move the hammer bit 220 in the longitudinal direction.

On the outer circumferential surface of the rear end of the coupling head 216 coupled to the rear end of the sleeve 210, a male screw portion 216a for engaging with the female screw portion 115 of the receiving portion 110 is formed. In addition, the coupling head 216 is hermetically screwed to the rear end of the sleeve 210 via the O-ring 284. The valve rear end 280b of the check valve 280 that selectively blocks the inflow of compressed air has a structure capable of closing the check end 216c of the coupling head 216, and has a spring at the valve front end 280a. 282 is fitted.

An O-ring 288 is fitted to the rear end of the valve seat 250 to maintain airtightness with the valve chest 270, and an O-ring 286 for airtightness with the inner cylinder 240 is fitted to the outer circumferential surface thereof. Inside the piston 230 is formed a through hole 234 through which compressed air introduced along the outer circumferential surface of the valve seat 250 strikes the piston 230 and then passes through. The rear end of the through hole 234 is guided to slide in the longitudinal direction while being inserted into the piston guide part 252 formed at the front end of the valve seat 250. Similarly, the front end of the through hole 234 is guided to slide along the longitudinal direction while being inserted into the piston guide part 228 formed at the rear end of the hammer bit 220.

The rear end portion 233 of the piston 230 has its outer peripheral surface sliding along the inner wall of the inner cylinder 240, and the middle portion 236 of the piston 230 also has its outer peripheral surface extending the inner wall of the sleeve 210. Sliding along, and directly to the price end 226 of the hammer bit 220 through the tip 232. A plurality of through holes 242 and 244 are formed at the front end of the inner cylinder 240 into which the rear end 233 of the piston 230 is inserted. The outer peripheral surface of the rear end of the hammer bit 220 is moved along the length direction in a state supported by the bit ring 214. An air discharge hole 224 is formed in the hammer bit 220 to be connected to the through hole 234 of the piston 230. The hammer bit 220 is connected to the air discharge hole 224 laterally. The high pressure injection port 226 for blowing air is formed to the outer peripheral surface.

4 shows the inner cylinder 240 in detail as a perspective view. As shown in FIG. 4, the outer circumferential surface of the valve seat 250 is provided with a plurality of grooves 258 by a plurality of protrusions 256. In operation, compressed air introduced through the groove 258 is supplied downward. In addition, a plurality of through holes 242 and 244 are formed below the inner cylinder 240. Among these, the upper second row through hole 244 is arranged to cross the lower first row through hole 242 in the circumferential direction, and is formed less than the first row through hole 242.

In FIG. 5, the hammer bit 220 is shown in detail as a perspective view. As shown in FIG. 5, the outer circumferential surface of the price end 226 of the hammer bit 220 is provided with a plurality of protrusions. In addition, a screw portion 212a screwed to the tip of the sleeve 210 is formed on the outer circumferential surface of the chuck 212 that is splined to allow the hammer bit 220 to move in the longitudinal direction. On the outer circumferential surface of the hammer bit 220 is formed a high-pressure injection port 226 for blowing air.

In the pneumatic drilling hammer configured as described above, when the compressed air supplied from the compressor through the air supply pipe 120 is introduced through the inlet hole 216b of the coupling head 216, the spring 282 is compressed by pneumatic check valve The check end 216c blocked by the rear end 280b of 280 is opened. The compressed air introduced into the open gap passes through the groove 274 formed in the valve chest 270 and the groove 258 of the valve seat 250 in order, and then the first row through hole 242 of the inner cylinder 240. Through the impact on the rear end surface of the middle portion 236 of the piston 230. At this time, since the second row through hole 244 of the inner cylinder 240 is blocked by the rear end 233 of the piston 230, the compressed air is a through hole of the piston 230 through the second row through hole 244. 234 does not flow.

When the compressed air impinges on the rear end surface of the middle portion 236 of the piston 230 through the first row through hole 242 of the inner cylinder 240, the piston 230 follows the inner wall of the inner cylinder 240. While advancing rapidly, the hammer bit 220 is pushed forward by vigorously hitting the price end 226 of the rear end of the hammer bit 220 through the tip end 232 of the piston.

When the ground layer to be improved is a rock layer such as a weathered rock layer or soft rock layer or a rock layer such as amber stone, when compressed air is supplied at a high pressure, the hammer bit 220 advances along the inner wall of the chuck 212 at high speed and adheres to the tip. By hitting a rock layer or a rock layer through a plurality of protrusions 222, the rock layer is crushed or pushed out. The hammer bit 220 which discharges the compressed air after striking the rock layer or the rock layer retreats upward by recoil.

The method of crushing the rock layer or the stone layer by the hammer bit 220 can crush the rock layer or the stone layer much more quickly than the method of scraping the rock layer or the stone layer by the conventional drilling head. However, since the tip of the auger shaft 21 does not rub against the rock layer or the stone layer, there is no fear that excessive force is not applied to the auger shaft 21 and the auger shaft 21 is not damaged.

When the piston 230 advances downward, the second row through hole 244 blocked by the rear end 233 of the piston 230 is opened, and the compressed air continues to be supplied, so that the piston 230 moves downward. In this state, the compressed air is introduced into the through hole 234 of the piston 230 through the second row through hole 244 and then discharged downward of the hammer bit 220 through the air discharge hole 224. Therefore, the compressed air discharged downward of the hammer bit 220 through the air discharge hole 224 serves to push the rock fractured by the hammer bit 220 upwards, so that the hammer bit 220 performs excavation work. Allow you to continue.

Compressor for supplying compressed air to the ground improvement agitator is to be mounted separately to the ground improvement agitator, which has not been described in detail herein, and the air supply pipe 120 of the auger shaft 21 is connected to the compressor. You will see that.

In addition, since the compressed air discharged below the hammer bit 220 serves to disturb and disrupt the ground to be ground to be improved, the ground to be ground is more finely ground.

In addition, a conveying screw 130 is formed on the outer circumferential surface of the accommodating part 110. The feed screw 130 that rotates according to the rotation of the auger shaft 21 pulls up the ground to be ground to be improved, so that the hammer bit 220 can continue the excavation work.

As the auger shaft 21 is lifted when the auger shaft 21 is lifted, the high drug ejected from the high drug ejection outlet 140 of the excavation wing 24 and the high drug ejection outlet 113 of the receiving part 110 is auger shaft ( 21 is rotated so that the feed screw 130 and the stirring blade 23 is rotated and mixed with the soil to be improved. In particular, in the present invention, since the improved target soil in the state of being crushed and crushed by the hammer bit 220 of the excavation hammer 20 is stirred and mixed with the high binder by the transfer screw 130 and the stirring blade 23, Agitation of the soil to be improved and the high binder is sufficiently performed.

In addition, the diameter of the tip portion of the hammer bit 220 may vary depending on the soil conditions of the ground to be improved. For example, if the ground to be improved consists only of soft soil such as sea urchin clay and measured clay, the highly viscous soil can adhere to the hammer bit and weaken the vertical vibration of the hammer bit, so that the diameter of the hammer bit is reduced. do. On the other hand, if there is a rock layer such as weathered rock or soft rock or a rock layer such as amber stone in the ground to be improved, the crushed rock layer or stone layer does not adhere to the hammer bit and there is no fear of weakening the vertical vibration of the hammer bit. Increase the diameter of the hammer bit.

Here, the ground to be improved primarily by the hammer bit 220 is secondarily excavated by the compressed air of high pressure ejected to the side of the hammer bit 22 through the air jet high pressure injection port 226. As described above, the high-pressure injection port for air ejection 226 formed on the outer circumferential surface of the hammer bit 220 is the edge of the ground hole to be improved by the hammer bit 220, that is, of the hammer bit 220 Since the high pressure compressed air scrapes and breaks the ground to be improved between the diameter and the diameter of the excavation blade 24, even if a rock layer or a rock layer exists in the ground to be improved, it can be easily broken.

As described above, according to the ground improvement agitator of the present invention, the ground layer was broken and excavated by the hammer bit of the drilling hammer at the time of the ground improvement, and at the same time, the high pressure water and the high pressure jet for the air jet and the high pressure jet for the air jet were used. Compressed air is ejected so that the rock layer can be quickly crushed and excavated without the need for drilling wings.

Claims (2)

In the ground improvement stirring device in which a high binder supply pipe (21a) is formed in the auger shaft (21) in the axial direction, and the stirring blade (23) is provided in the middle of the outer circumferential surface of the auger shaft (21), After the front end of the auger shaft 21 extends downward by a predetermined length, a hollow cylindrical accommodating part 110 having a lower opening is formed at the extended front end, An air supply pipe 120 and a water supply pipe 21b are formed inside the auger shaft 21 in parallel with the high binder supply pipe 21a. Inside the accommodating part 110, a high dispensing agent supply pipe 111 communicating with the high dispensing drug supply pipe 21 a and a water supply support pipe 112 communicating with the water supply pipe 21 b are connected to the accommodating part 110. Is formed to near the tip, On the outer circumferential surface of the accommodating part 110 is a high-pressure injection nozzle 150 for continuous injection of the high drug delivery pipe 111 and the water injection high-pressure injection port 160 for the water supply pipe 112 connected in series. Formed, Inside the accommodating part 110, a known drilling hammer 200 is connected to the air supply pipe 120 in series by a predetermined coupling means, Feed screw 130 is formed on the outer circumferential surface of the auger shaft 21 and the receiving portion 110, An air discharge hole 224 is formed in the lower portion of the hammer bit 220 provided at the tip of the excavation hammer 200, but the outer peripheral surface of the hammer bit 220 is connected to the air discharge hole 224 in a lateral direction. Ground agitation device, characterized in that the high-pressure injection port for air blowing until 226 is formed. According to claim 1, The coupling means is composed of a female screw portion 115 formed in the upper inner center of the receiving portion 110 and a male screw portion 216a formed at the rear end of the drilling hammer 200, The female screw unit 115 is ground agitating device, characterized in that formed in communication with the air supply pipe (120).