KR100652832B1 - Tunneling machines having a grouter injection apparatus - Google Patents

Abstract

The present invention relates to a tunnel excavator provided with a chemical injection device, comprising: a steel cylindrical front cylinder (100) installed so that the cutter head (300) is rotatable in front; The rear of the front cylinder 100 is coupled to a plurality of direction modification jacks 210, a plurality of cutter motor 220 and the reducer 221 for driving the cutter head 300 therein is provided, the lower portion In the tunnel excavator consisting of a back pipe 200 is provided with a pipe 231 and a pipe 232, the supply pipe 400 for supplying a chemical liquid injected through the hose from the chemical injection plant installed on the ground; The first pipe block 510 coupled to the supply pipe 400, the second pipe block 520 rotatably coupled to the first pipe block 510, the first pipe block 510 and the second pipe Rotating joint portion 500 which is installed between the coupling surface of the block 520 is formed in the airtight holding means 530 is installed to block the gap therebetween installed in the rear of the cutter head 300; A connection part 600 connected to the second pipe block 520 of the rotary joint part 500 to provide at least one path for supplying the chemical liquid to the cutter head 300; It includes at least one chemical injection hole 700 formed to penetrate the cutter head 300 so that the end of the connection portion 600 is inserted, and does not require additional equipment on the ground when injecting grout chemical solution. By directly injecting grout chemical into the membrane face of the front of the cutter head, the efficiency of the work can be increased, and the construction period and construction cost can be reduced.

Description

Tunnel excavator with chemical injection device {TUNNELING MACHINES HAVING A GROUTER INJECTION APPARATUS}

1 is a plan view showing an embodiment of a tunnel excavator according to the prior art,

2 is a front view of the cutter head of the tunnel excavator according to the prior art of FIG.

3 is a plan view showing an embodiment of the tunnel excavator with a chemical injection device according to the present invention,

4 is a front view of the cutter head of the tunnel excavator with the chemical injection device of FIG.

5 is an enlarged view of a rotary joint and a connection part of the tunnel excavator equipped with the chemical injection device of FIG. 3;

FIG. 6 is a view illustrating a state in which a second protective cover is installed at a connection portion of a chemical injection device of a tunnel excavator equipped with a chemical injection device of FIG. 3.

<Description of the symbols for the main parts of the drawings>

100: front cylinder 110: hollow shaft

120: reducer 130: first crusher

140: second crusher 220: cutter motor

221: reducer 231: tunnel piping

232: BANNY PIPE 300: Cutter Head                 

400: supply pipe 410: control valve

500: rotary joint 510: first piping block

520: second piping block 530: confidentiality means

531: rubber packing 532: O-ring

540: bushing 550: first protective cover

600: connection part 610: flange piping

620: distribution pipe 630: chemical liquid pipe

640: second protective cover 700: chemical injection hole

710: rubber plate 720: mounting ring

The present invention relates to a tunnel excavator used in the propulsion method, and more particularly, a chemical injection device for injecting and solidifying a chemical solution into a membrane surface to meet the stone or soft layer during tunnel excavation, or when the drilling efficiency is not expected When the tunnel excavator is to be retracted due to the unsuccessful situation, the tunnel excavator is provided with a tunnel excavator equipped with a chemical injection device for spraying the grout chemical solution directly toward the face to prevent the collapse of the ground.

The propulsion method inserts a steel cylindrical excavation machine called a micro tunneling machine or a semi-shield machine into a vertical work tool, and the cutter head for earth excavation mounted on the tip of the machine. Excavate the ground while rotating and perform various auxiliary methods (water and chemical injection) on the membrane surface to prevent the collapse of the membrane surface and press and push the propulsion pipes installed at the rear of the tunnel excavator with hydraulic jacks one by one. Repeating the work is digging the tunnel.

1 is a plan view showing an embodiment of a tunnel excavator according to the prior art, Figure 2 is a front view of the cutter head of the tunnel excavator of FIG.

As shown, the tunnel excavator according to the prior art is composed of a steel cylinder front body (100) and tail body (tail body) (200).

On the front of the front cylinder 100, a roller cutter 310, a main bit 320 and a cutter head 300 provided with an opening 330 are installed to be rotatable.

A cylindrical hollow shaft 110 having a hollow portion 111 formed therein is fixed to a central portion of the front cylinder 100. For this purpose, the hollow shaft 110 extends from the inside of the front cylinder 100 to support brackets 150. Is supported by. The gearbox 120 is bearing-coupled to the outer circumference of the hollow shaft 110, and the first crusher 130 is screwed in the axial direction to the front of the gearbox 120. The first crusher 130 has an approximately trumpet shape extending forward and extending from the outer circumference of the gearbox 120. An end of the first crusher 130 is extended to a degree similar to the diameter of the front cylinder 100, the cutter head 300 is coupled to the end of the first crusher 130.

One end of the hollow shaft 110 is provided with a second crusher 140 is fixed in the axial direction, the end of the second crusher 140 and the inclined surface plate 131 of the first crusher 130 along the outer peripheral surface An inclined surface plate 144 having an opposite shape is formed to form a circular first fracture space 160 that gradually narrows toward the rear side between the inclined surface plates 131 and 144. In addition, a circular passage 161 is formed inside the first shredding space 160, and a circular second shredding space 170 is formed behind the passage 161.

The rear cylinder 200 is coupled to the front cylinder 100 and a plurality of steering jack (210), for this purpose the hydraulic pressure for supplying the hydraulic pressure to the direction modification jack 210 inside the rear cylinder (200) A plurality of solenoid valves 212 are provided for adjusting the stroke of the device 211 and the reorienting jack 210.

In addition, a plurality of cutter motors 220 and a reducer 221 for driving the cutter head 300 are installed inside the rear cylinder 200. The reducer 221 is gear-coupled to the gear box 120 of the front cylinder 100, for this purpose, the gear box 120 is a main gear formed with a ring-shaped gear teeth, the pinion gear coupled to the reduction shaft of the reducer 221. And 122 and a plurality of bearings 121.

The rear cylinder 200 is provided with a fang pipe 231 and a manifold pipe 232 at the lower end of the inner side, the one end of the rear cylinder 200 is provided with a scale engraved target and a panel 241 is installed a plurality of gauges, In the rear of the panel 241, a camera 242 for observing the same is installed so that it can be observed in a cockpit located on the ground.

On the other hand, the hollow portion 111 of the hollow shaft 110 and the hollow portion 141 of the second crusher 140 provides an internal space in the center of the front cylinder 100 so that the operator through the hollow portion (111,141) It allows to enter the rear 180 of the head 300. To this end, doors 113 and 143 that can be opened and closed are respectively installed on the rear side 112 of the hollow shaft 110 and the front side 142 of the second crusher 140.

Excavation work and operation of the tunnel excavator according to the prior art made of such a structure is made as follows.

First, the vertical work tool is excavated at a predetermined position on the ground, and the tunnel excavator described above is introduced into the vertical work tool and installed. Aligning the cutter head 300 in the excavation direction, one propulsion pipe to the rear of the rear cylinder 200 and a hydraulic jack for applying a pressing force in the excavation direction by using a reaction force in the tunnel excavator is installed.

Tunnel excavator is propelled with the propulsion pipe in the drilling direction by the hydraulic jack, the front of the cutter head 300 is in close contact with the ground. The driving force of the cutter motor 220 forms a high torque while passing through the reducer 221 to rotate the first crusher 130 and the cutter head 300.

The roller cutter 310 and main bit 320 rotate with the cutter head 300 to crush the soil and rock. The crushed soil and rock are pushed into the first crushing space 160 through the opening 330.

The soil and rock pushed into the first crushing space 160 are more finely crushed by the rotating first crusher 130 and the fixed second crusher 140 to pass through the narrowed passage 161 to form the second crushing space ( Pushed into 170). The soil and rock that are pushed into the second shredding space 170 is mixed with the water flow supplied through the fang pipe 231 is discharged to the bunny pipe 232. In this way, the tunnel excavator is pushed by the length of the propulsion pipe, and then the hydraulic jack is retracted and another propulsion pipe is inserted again.

However, when the tunnel excavator meets the stone floor due to the change of the strata during the excavation, the excavation may not be possible, and an unexpected situation occurs during the excavation operation, and when the excavation is no longer possible, the tunnel excavator is retreating backward. Underground space may be generated at the front of the cutter head by the distance to retract the tunnel excavator, and the ground may collapse.

In this case, conventionally, the ground is vertically excavated with a perforator in the ground to inject a chemical solution into the membrane face of the cutter head front side to solidify the electrode layer, or to inject or inject the chemical solution into the membrane face, and then retreat the tunnel excavator back. Therefore, there is a problem that the air due to the punching machine input is delayed and the construction cost is increased.

Accordingly, the present invention is to solve the conventional problems as described above, when the chemical liquid injection device is provided in the tunnel excavator to inject the grout chemical liquid into the membrane surface does not require any additional equipment from the ground front of the cutter head The grout chemical can be injected directly into the membrane surface of the cutter head, and the grout chemical liquid can be directly injected into the membrane surface of the front of the cutter head, thereby increasing the efficiency of the work. The purpose is to provide a tunnel excavator.

The present invention for realizing such an object, the front cylindrical body of the steel cylinder installed so that the cutter head is rotatable in front; It is coupled to a plurality of steering jacks at the rear of the front cylinder, and a plurality of cutter motors and reducers are provided therein for driving the cutter head, and at the bottom thereof, a pipe for the fangs and a bunny A tunnel excavator including a tail body in which a pipe is installed, the tunnel excavator comprising: a supply pipe for supplying a chemical liquid injected through a hose from a chemical liquid injection plant installed on the ground; Installed between the first pipe block coupled to the supply pipe, the second pipe block rotatably coupled to the first pipe block, and the mating surface of the first pipe block and the second pipe block to block the gap between them. Rotating joint is formed in the rear of the cutter head made of a hermetic holding means; A connection part connected to the second pipe block of the rotary joint part and providing at least one path for supplying chemical liquid to the cutter head; It characterized in that it comprises at least one chemical injection hole formed in the cutter head so that the end of the connection portion is inserted.

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

Figure 3 is a plan view showing an embodiment of a tunnel excavator with a chemical injection device according to the present invention, Figure 4 is a front view of the cutter head of the tunnel excavator with a chemical injection device of Figure 3, Figure 5 FIG. 3 is an enlarged view of the rotary joint and the connecting portion of the tunnel excavator equipped with the chemical injection device of FIG. 3. In addition, about the part which consists of the same structure as before, the same code | symbol as the code | symbol shown in FIG. 1 and FIG. 2 is described and demonstrated.

As shown, the tunnel excavator equipped with the chemical injection device has a steel cylindrical front body (100) installed so that the cutter head 300 is rotatable in the front, and a plurality of directions in the rear of the front cylinder (100) Connected to the supply pipe 400 and the supply pipe 400 is injected with a chemical solution through a hose from the chemical injection plant (not shown) installed on the ground and the rear cylinder 200 coupled to a steering jack (steering jack; 210) Is connected to the rotary joint 500, the rotary joint 500 is connected to the cutter head 300 to provide a path for supplying the chemical liquid to the cutter head 300, and the cutter head so that the end of the connection portion 600 is installed ( It consists of a chemical liquid injection hole 700 formed in 300.

The front cylinder 100 has a roller cutter 310, a main bit 320 and a cutter head 300 provided with an opening 330 on the front thereof so as to be rotatable, and a hollow portion (3) in the center thereof. A hollow hollow shaft 110 having a 111 formed therein is fixedly installed, and a gear box 120 coupled to a bearing 121 is installed at an outer circumference of the hollow shaft 110.

A trumpet-shaped first crusher 130 is fixedly axially coupled to an outer circumference of the gear box 120, and an end of the first crusher 130 extends to a diameter similar to that of the front cylinder 100. The cutter head 300 is coupled to the end of the first crusher 130.

The hollow shaft 110 is supported by the support bracket 150 extending from the inside of the front cylinder (100). One end of the hollow shaft 100 is provided with a second crusher 140 fixed in the axial direction, the end of the second crusher 140 and the inclined surface plate 131 of the first crusher 130 along the outer peripheral surface An inclined surface plate 144 having an opposite shape is formed to form a circular first fracture space 160 that gradually narrows toward the rear side between the inclined surface plates 131 and 144.

In addition, a circular passage 161 is formed inside the first shredding space 160, and a circular second shredding space 170 is formed behind the passage 161.

The rear cylinder 200 is coupled to the front cylinder 100 and a plurality of steering jacks (210), a hydraulic device for supplying hydraulic pressure to the direction modification jack (210) inside the rear cylinder (200) 211 and a plurality of solenoid valves 212 are provided for adjusting the stroke of the direction correction jack 210.

In addition, a plurality of cutter motors 220 and a reducer 221 for driving the cutter head 300 are installed inside the rear cylinder 200, and the reducer 221 is the front cylinder 100. The gearbox is coupled to the gearbox 120. The inner lower end of the rear barrel is provided with a fang pipe 231 and a bunny pipe 232.

On the other hand, the hollow portion 111 of the hollow shaft 110 and the hollow portion 141 of the second crusher 140 provides an internal space in the center of the front cylinder 100 so that the operator through the hollow portion (111,141) It allows to enter the rear of the head (300). To this end, doors 113 and 143 that can be opened and closed are respectively installed on the rear side 112 of the hollow shaft 110 and the front side 142 of the second crusher 140.

The supply pipe 400 connected to the hose from the chemical liquid injection supply device installed on the ground passes through the rear side 112 of the hollow shaft 110 and the hollow portion 111 and the second crusher of the hollow shaft 110. The rotary joint 500 is installed to pass through the hole (not shown) formed in the front surface 142 of the second clutch tu 140 through the hollow portion 141 of the 140 and It is connected.

On the other hand, the supply pipe 400 may be provided with a control valve 410 in order to prevent reverse flow of water from the barrier in front of the cutter head 300, the control valve 410 is ground Is connected to the control box of the control valve 410 on the ground is on / off. For example, a ball valve may be used as the control valve 410.

The rotary joint 500 is installed at the rear of the cutter head 300, the first pipe block 510 is coupled to the supply pipe 400, and the second pipe rotatable to the first pipe block 510. The piping block 520, and the airtight holding means 530 is provided between the coupling surface of the first pipe block 510 and the second pipe block 520.

The first pipe block 510 is fixed to the front surface 142 of the second crusher 140 with a bolt and a nut, and the supply pipe 400 penetrates a hole formed in the front surface 142 of the second crusher 140. Combined. The first pipe block 510 is fitted into the second pipe block 520. The airtight holding means 530 is installed between the coupling surfaces of the first pipe block 510 and the second pipe block 520 to block the gap, and the airtight holding means 530 is the first pipe block 510. It is preferable that the rubber packing 531 and the plurality of O-rings 532 installed on the outer circumferential surface thereof. In addition, a bushing 540 is installed between the first pipe block 510 and the mating surface of the second pipe block 520 to reduce wear of the first pipe block 510 and the second pipe block 520. You can.

In addition, the second pipe block 520 of the rotatable part 500 may include at least one grease inlet for injecting grease into a coupling surface of the first pipe block 510 and the second pipe block 520. 550 may be provided. Therefore, the second pipe block 520 can smoothly rotate from the first pipe block 510.

On the other hand, the rotatable portion 500 may be provided with a first protective cover 560, thereby protecting the rotatable portion 500 from the excavated soil and crushed rock.

The connection part 600 is connected to the second pipe block 520 of the rotary joint 500, and the connection part 600 is flanged to the flange pipe 610 and the second pipe block 520. The end of the pipe 610 is flange-coupled with the distribution pipe 620 is installed on the fixing member 622 formed on the back of the cutter head 300. At least one branch 621 is formed at one side of the distribution pipe 620, and each branch 621 has a chemical liquid pipe 630 coupled thereto, and the chemical liquid pipe 630 is inserted into the chemical liquid injection hole 700. Is installed.

On the other hand, Figure 6 is a view of a state in which the second protective cover is installed in the connection portion of the chemical injection device of the tunnel excavator equipped with the chemical injection device of FIG. As shown, the connection portion 600 is provided with a second protective cover 640, the second protective cover 640 is in the female screw hole 641 formed in the fixing member 622 is installed distribution tube 620. It is fastened with the bolt 642. Therefore, the connection part 600 is protected from the excavated soil and crushed rock by the second protective cover 640.

The chemical injection hole 700 is formed through the cutter head 300. In addition, a rubber plate 710 having a “+” shaped gap is installed inside the chemical injection hole 700, and a front surface of the rubber plate 710 is installed in the chemical injection hole 700 to mount the rubber plate 710. Mounting ring 720 may be coupled. Therefore, due to the pressure of the chemical liquid flowing out by the chemical liquid pipe 630 is injected into the membrane surface through the "+" shaped gap of the rubber plate 710, the rubber plate 710 when the supply of the chemical liquid is stopped The front end of the cutter head 300 acts as a check valve to prevent the sediment or rock of the membrane from flowing backward to block the chemical liquid pipe 630.                     

Hereinafter, the basic operation of the tunnel excavator equipped with a chemical liquid injection device according to the present invention is as follows.

The tunnel excavator is propelled together with the propulsion pipe (not shown) in the drilling direction by the hydraulic jack not shown, so that the membrane pressure is formed on the front surface of the cutter head 300. The driving force of the cutter motor 220 forms a high torque through the reducer 241 to rotate the gearbox 120. The gearbox 120 rotates the first crusher 130 and the cutter head 300 to crush the soil and rock in front of the cutter head 300 by the roller cutter 310 and the main bit 320. The crushed soil and rock are crushed by the first crusher 130 and the fixed second crusher 140 which are pushed into the first crushing space 160 through the opening 330 and narrowly formed. Thru the rock crushed into the second shredding space 170, the crushed soil and rock pushed into the second shredding space 170 is mixed with the water flow supplied through the tunnel pipe 231, the banney pipe 232 Is discharged.

When such a tunnel excavator encounters a rock formation during tunnel excavation and the excavation efficiency is decreased, ground disturbance is expected, or when the tunnel excavator needs to be retracted due to an unexpected situation, the operator of the ground tunnel excavator is required to grout the ground. By operating the stored chemical solution injection device is supplied to the supply pipe 400 through the hose. The chemical liquid supplied to the supply pipe 400 is sprayed to the membrane surface through the chemical liquid injection hole 700 of the cutter head 300 via the rotary joint portion 500 and the connection portion 600.

The rotary joint part 500 serves to connect the fixed supply pipe 400 and the rotating connection part 600. In addition, when the chemical liquid is not supplied to the cutter head 300 from the ground liquid injection device, the driver located on the ground operates the control valve 410 installed on the path of the supply pipe 400 to supply the supply pipe 400. Shut off prevents water from flowing back into the supply pipe 400 from the membrane face in front of the cutter head 300. In addition, the rubber plate 710 installed in the chemical liquid injection hole 700 prevents the groundwater or rock from the front of the cutter head 300 from flowing backward to block the chemical liquid pipe 630.

According to a preferred embodiment of the present invention as described above, when the grout chemical to be injected into the membrane surface when drilling the tunnel with the tunnel excavator by providing a chemical injection device in the tunnel excavator without the need for additional equipment on the ground The grout chemical liquid may be directly injected into the membrane surface through the chemical liquid injection hole formed in the front of the cutter head.

As described above, according to the present invention, when the grout chemical is to be injected when the turner is pushed into the tunnel excavator with the chemical injection device in the tunnel excavator, the chemical injection hole formed on the front of the cutter head is not required. The grout chemical can be injected directly into the curtain surface, and the grout chemical can be directly injected into the curtain surface of the front of the cutter head to increase the efficiency of the work, thereby reducing the construction period and construction cost. .

What has been described above is only an embodiment for carrying out a tunnel excavator equipped with a chemical liquid injection device according to the present invention, the present invention is not limited to the above embodiment, as claimed in the following claims Without departing from the gist of the present invention, those skilled in the art to which the present invention pertains to the technical spirit of the present invention to the extent that various changes can be made.

Claims (2)

A steel cylindrical front body provided so that the cutter head is rotatable in front; It is coupled to a plurality of steering jacks in the rear of the front cylinder, a plurality of cutter motor (reducer) and reducer (reducer) for driving the cutter head therein is provided, the lower part of the pipe And in the tunnel excavator consisting of a tail cylinder in which the vane pipe is installed, A supply pipe for supplying a chemical liquid injected through a hose from the chemical liquid injection plant installed on the ground; A gap between the first pipe block coupled to the supply pipe, a second pipe block rotatably coupled to the first pipe block, and a coupling surface of the first pipe block and the second pipe block. Rotating joint is formed in the rear of the cutter head consisting of a hermetic holding means installed to block the; A connection part connected to the second pipe block of the rotary joint part to provide at least one path for supplying chemical liquid to the cutter head; At least one chemical injection hole formed in the cutter head to insert the end of the connection portion; Tunnel excavator with a chemical injection device comprising a. The method of claim 1, wherein the connection portion, A flange pipe coupled with the second pipe block of the rotary joint; A distribution pipe coupled to an end of the flange pipe, at least one branch is formed, and fixed to a rear surface of the cutter head; At least one chemical pipe connected to the branch of the distribution pipe and the chemical injection hole; Tunnel excavator equipped with a chemical injection device, characterized in that consisting of.

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