KR100869932B1 - The methods of pipe propulsion construction that use changeable water-jet system and micro-shield ? there's Apparatus - Google Patents

Abstract

The present invention is installed in the forward base (E) excavated on one side of the ground (A) to be installed, the forward device for advancing the propulsion device and the fume pipe, and the water jet powder installed in the front of the forward device installed through the pipe A variable water jet micro shield propulsion device comprising a rotary driving device for rotating and driving a body and water jet injector, a fume pipe and a leader installed on the front of the rotary driving device and containing a water jet spraying body, and a propulsion method using the same will be.

Water jet propulsion method. Adjustable water jet. Water jet propulsion device.

Description

The method of pipe propulsion construction that use changeable water-jet system and micro-shield & there's Apparatus}

1 is an overall view of a variable water jet micro shield propulsion device of the present invention

Figure 2 is a side cross-sectional view of the variable water jet jet of the present invention

Figure 3 is a side cross-sectional view of the variable water jet injector end of the present invention

4 is a front elevational view of a variable water jet jet of the present invention.

5 is a detailed view of the tip of the variable water jet micro-shield propulsion device of the present invention

6 is a detailed view of the front end of the variable water jet micro-shield propulsion device of the present invention

<Description of the Drawings>

Generator (1), hydraulic unit (2), water tank (3), compressor (4), abrasive tank (5), water jet drive (6), water pipe (7), electric wire and hydraulic hose (9), reaction force Wall (10), push rod (11), cylinder (12), hydraulic propulsion jack (13), propeller support (14), electric control box (15), propulsion shaft driver (20), screw auger drive shaft (30), Hydraulic jack support wall 31, hydraulic jack 32, hollow cylinder 33, injector backward bulkhead 34, screw auger 35, auger head 40, crushing bit 41, water jet spray nozzle ( 42), water jet spray tip end 43, variable water jet spray 45, rubber inlet shielding seal 49, crankshaft 50, fume pipe 60, casing pipe 61, Support 62, soil discharge outlet 65, joint 66, lead 70, clear ground A, forward base E

The present invention is installed in the forward base (E) excavated on one side of the ground (A) to be installed, the forward device for advancing the propulsion device and the fume pipe, and the water jet powder installed in the front of the forward device installed through the pipe A variable water jet micro shield propulsion device comprising a rotary driving device for rotating and driving a body and water jet injector, a fume pipe and a leader installed on the front of the rotary driving device and containing a water jet spraying body, and a propulsion method using the same will be.

In recent years, the concentration of population and economic centers has accelerated around large cities, and the classification of administrative districts in Korea has become widespread. The necessity of three-dimensional use of underground space is rapidly increasing for various pipelines directly related to economic life such as sewerage, communication, electricity, and city gas.

If you look at the general propulsion method of foreign countries, the method of propelling the propulsion pipe from 800mm to 3400mm sequentially by the hydraulic jack installed in the forward base can be divided into manpower excavation propulsion method and semi-shield method (mechanical combined propulsion method). have.

Looking at the manpower excavation method,

As a method of attaching a blade or shield blade to the tip of the propulsion pipe, and excavating the earth and sand by manpower, injecting the propulsion pipe with a hydraulic jack and embedding the pipe body in the ground.

First, the open (round) propulsion method attaches a blade to the tip of the pipe, and excavation work of the soil is carried out by manpower. The excavated soil is transported in a pipe by a truck and taken out of the forward base. In the forward base, hydraulic jack, reaction wall, rail, and square rod are used to propel the pipe body. The ground of the excavation target is open because the end of the pipe is open. If the ground is difficult to stabilize, the auxiliary method such as chemical injection method is used in parallel, but this method is not applicable to aquifer fluid sand. This construction method is applied to construction sites of 30m to 70m, which has a relatively short driving distance.

Second, the medium pressure jack propulsion method has been gradually spread and the necessity of long-distance propulsion has increased, so the propulsion method using the medium pressure jack has been developed. This is limited to the axial resistance of the pipe to be propulsion and the allowable reaction of the reaction wall, but the propulsion resistance increases as the propulsion distance increases. Above this driving distance, a medium pressure jack is installed in the middle of the propulsion pipe to reduce the thrust pressure of the open pressure jack of the open hydraulic propulsion system.

Third, as the propulsion technology is developed, the curve propulsion method increases the ratio of long-distance propulsion and inevitably needs to perform the curve propulsion. The difference between the straight line propagation and the straight line propagation is that it is difficult to survey (it is necessary to carry out surveying equipment with the inside of the pipe), and it is easy to damage the pipe due to the unbalanced load on the connection surface of the pipe. It is necessary to stabilize the excavated ground larger than the outer diameter, and it is difficult to change the direction of the blade of the tip of the propulsion pipe and it is easy to be zigzag-type.

If you look at the semi-shield method,

First, the Nisu pressurized propulsion method: This method is a closed mechanical excavation shield method, which has a partition wall between the excavation shield and fills the mud with the excavation shield side. The excavation of the shield is carried out by the action of the film (mud-film), and the earth and sand are sent through the pipe together with the mud water to the sewage treatment plant to separate the soil and water. Nisu containing separated particles is sent to the shield for circulation.

Second, the earth pressure balance propulsion method is a method of excavating the machine while preventing the collapse of the ground by generating earth pressure in the bulkhead with the shield and the bulkhead like the nisu pressurized propulsion method. Xantry is excavated with a screw convayor and discharged out of the forward base by a truck.

In the case of the country, most of pipe line construction such as water and sewage, communication, electric power, city gas performed by open construction method until now. However, not only traffic obstacles are required to excavate pipelines in the urban areas with open construction methods, but also the easy opening and excavation of roads due to various civil complaints is increasingly severely regulated. In particular, there are strict regulations on the method of laying excavation in widespread roads, busy streets, dense and adjoining areas, and pipeline construction such as vehicle-only roads, highways, railroads, dikes, and river crossings. There is a situation. In the case of pipeline construction, which is newly constructed due to the increase of underground buried materials, the construction of deep underground underground is required. Due to the change of construction environment, pipeline construction by propulsion drilling method is occupying a lot of market share in Korea.

However, in Korea, where the introduction of the propulsion method is short, the recognition level of the propulsion method is still very low, and the propulsion method is not recognized as a completed method in the geotechnical field such as the existing tunnel method. At present, however, Japan, the leader of the propulsion method, is setting up the propulsion method as an independent field different from the large-diameter tunnel method. Due to various domestic circumstances different from Japan, an independent propulsion method should be developed for the Korean situation. For example, in Korea, there are many difficulties in introducing advanced technology of Japanese propulsion in various circumstances. First, the basic ground construction condition of domestic road is very irregular, and there are many poorly constructed roads and there is little recognition about propulsion method. The construction cost of the field is prohibitively low in construction cost by adopting the Japanese advanced propulsion method, and the regular continuity of the domestic geological ground is small.

In order to solve the above problems, the present invention is usually attached to a variable ground water jet excavation device to the micro-shield propulsion device for the ground, during the progress of the project for the normal ground, obstacles such as concrete structures or steel, amber stone, In order to remove the obstacles and continue the propulsion work even if rock foundations such as rocks appeared, a variable water jet micro-shield propulsion device and a propulsion method using the same were developed according to the domestic construction environment.

In order to achieve the above object, the present invention can be largely divided into two parts.

The first part (see Fig. 1) is a propulsion excavation system using a micro-shield propulsion system. When the propulsion shaft driver is rotated by receiving power from the generator and hydraulic unit located on the ground, the screw auger shaft and the auger head with the crushing bit rotate, leading The ground is excavated and the soil is discharged backwards by a screw auger. In addition, the propulsion work of the excavation propulsion device drives the hydraulic propulsion jack attached to the rear of the propulsion device, so that the propulsion device is propelled to the front part by using the force resisting the reaction wall using the cylinder and the push rod. Then, the reclaimed sewage discharged backward by the screw auger is carried to the ground portion of the bucket, and separated into recycled water and soil by the sediment separator.

The second part (see Fig. 2 to Fig. 4) is a water jet (abrasive + high pressure air + water mixing) generated through the water jet drive (abrasive tank + compressor + water tank) on the ground and the screw auger drive shaft through the water pipe. The obstacle is crushed using the power of the water jet through the water jet spray nozzle of the water jet spraying body provided in front of the screw auger drive shaft of the water pipe and the leader provided therein. The water jet spraying body developed to evenly fracture the leading ground obstacles such as rocks is moved to the front and back using the hydraulic jack with the hydraulic jack support wall installed in the screw auger drive shaft as the reaction wall. The crushing effect of the obstacle was greatly increased by making contact, and between the inner wall of the screw auger drive shaft and the outer wall of the water jet injector to prevent external soil from entering the screw auger drive shaft during the forward and backward movement of the water jet injector (variable type). The rubber packing was installed. In addition, in order to prevent the water jet spraying bodies (variable type) from entering the screw auger drive shaft due to the earth pressure of the leading ground during the propulsion work of the general soil layer, a bulkhead for preventing the reversal of spraying bodies was installed.

And the front and rear movement width of the water jet jet (variable type) was set differently according to the propulsion diameter, in order to make the water jet evenly contact the pre-excavation surface.

In addition, the water jet injector (variable type) allows the water jet water pipe to pass through the hollow shaft cylinder, which is drilled inside, so as to be efficiently disposed in a small area in the screw auger drive shaft.

The present invention can be divided into two, the first method (see Fig. 5) is a method of propelling and excavating to the general soil ground without using a water jet, spraying general water through the water jet spray nozzle leading ground The excavation and dismantling work was made easily in the nito state, and the water jet spraying body (variable type) proceeded the excavation work in the state of being closely attached to the auger head without moving back and forth.

The second method (see Fig. 6) is a method of propelling and excavating obstacle ground and moving the water jet mixed liquid conveyed through the water jet driving device on the ground while moving the variable water jet injector back and forth through the water jet spray nozzle. Crush to make contact with the excavation surface evenly.

Hereinafter, the present invention will be described in detail with reference to Examples.

Example 1

First process (preparation process)

By operating the hydraulic propulsion jack 13 powered by the hydraulic unit 2 in the forward base E, the propulsion system is moved forward by utilizing the force resisting the reaction wall using the cylinder 12 and the push rod 10. At the same time pushing to the part,

The hydraulic jack 32 and the hollow side cylinder 33 installed in the screw auger drive shaft 30 operate the hydraulic jack support wall 31 as a reaction wall to operate the hydraulic jack 32 to front and rear the water jet spray body 45. After moving to and place it on the pre-excavation surface of the leading ground,

2nd process (excavation process)

The compressor (4) connected to the water tank (3) and the abrasive tank (5) installed on the other side of the ground while rotating the propulsion shaft driver (20) by receiving power from the generator (1) and the hydraulic unit (2) located on the ground. By operating the water jet driving device 6 together, the high-speed water is blocked by the water jet spray nozzle 42 of the water jet spraying body 45 installed in front of the screw auger drive shaft 30 through the water pipe 7. At the same time as the high speed jet so as to crush by using the water jet force, the auger head 40 attached to the screw auger drive shaft 30 and the crushing bit 41 is rotated to excavate the leading ground and the earth and sand to the screw auger 35 Discharged to the rear by the back, by the screw auger is discharged to the back to the earthed soil is stacked through the soil discharge outlet 65 is carried to the ground portion to the bucket (not shown),

When the excavation is carried out in a predetermined portion, it is again advanced by the excavated section in the same manner as in the first step, and then reexcavated as described above and excavated using a variable water jet micro shield device.

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

1 is an overall view of a variable water jet micro shield propulsion apparatus of the present invention, FIG. 2 is a side cross-sectional detail view of a variable water jet injector according to the present invention, FIG. 4 is a detailed front view of the variable water jet injector according to the present invention, and FIG. 5 is a detailed view of the front end of the variable water jet micro shield propulsion device according to the present invention. The generator (1), hydraulic unit (2), water tank (3), compressor (4), abrasive tank (5), water jet drive device (6), water transmission fan (7), electric wire and hydraulic pressure Hose (9), reaction force wall (10), push rod (11), cylinder (12), hydraulic propulsion jack (13), propeller support (14), electric control box (15), propulsion shaft driver (20), screw Auger drive shaft (30), hydraulic jack support wall (31), hydraulic jack (32), hollow cylinder (33), injector backward bulkhead (34), screw auger (35), auger head (40), shredding bit (41) , Water jet spray nozzle 42, water jet spray tip end 43, variable water jet spray 45, soil inlet blocking rubber packing 49, crankshaft 50, fume pipe 60, It can be seen that the casing pipe 61, the support 62, the soil discharge outlet 65, the connection joint 66, the clearing lead 70, the clearing ground (A), the forward base (E).

Looking at the structure, the variable water jet micro-shield propulsion device of the present invention as shown in Figures 1 to 6,

A forwarding device installed in the forward base E excavated on one side of the ground A to be installed, for advancing a propulsion device and a fume pipe, and a water jet spraying body and water installed in the front of the forwarding device and penetrating the inside of the pipe. A variable water jet micro shield propulsion device comprising a rotary drive device for rotating and driving a jet injector, and a fume pipe and a leader installed on a front surface of the rotary drive device to embed a water jet sprayer.

The advancing device includes a reaction force wall 10 installed at one side of the advance base E excavated at one side of the ground A to be constructed, a push rod 11 installed at the lower front surface of the reaction force wall 10, and the A cylinder 12 and a hydraulic propulsion jack 13 installed on the front of the push rod 11, a propulsion device pedestal 14 provided below the push rod 11 and the hydraulic propulsion jack 13;

A water tank (3) installed at one side of the ground and storing water, a compressor (4) installed at one side of the water tank (3), a water jet driving device (6) connected to the water tank (3) and the compressor; An abrasive tank 5 installed on the water jet driving device 6, a water supply pipe 7 connected to the water jet driving device 6, and installed in the device;

It is composed of a generator (1) installed on the other side of the ground, and a hydraulic unit (2) connected to the generator (1),

The rotary drive device is an electric control box 15 connected to the hydraulic unit (2) by a wire and a hydraulic lake (9), and driven by the electric control box 15 and the lower portion of the electric control box (15) Propulsion shaft driver 20 is installed on the upper portion of the hydraulic propulsion jack 13, and the removal of the drive shaft crank (50) installed on the front of the propulsion shaft driver 20,

2 to 5, the variable water jet spraying body is rotated by the rotation of the drive shaft driver 20 and is connected to the drive shaft crank 50 so that the fume pipe 60 and the lead body 70 are separated. Cylindrical pipe-shaped screw auger driving shaft 30 installed through the inside, the water jet injection body 45 provided on the front surface of the screw auger driving shaft 30, the screw auger driving shaft 30 and the water jet injection body ( Screw auger 35 provided in a skew shape on the outside of the 45, and the central portion connected to the water supply pipe 7 so that the water jet injected from the water jet drive device 6 is transferred to the inside of the screw auger drive shaft 30 The hollow portion is provided, the outer end portion is connected to the water jet spray nozzle 42 of the auger head 40,

The screw auger drive shaft 30 has a hydraulic jack support wall 31 in the middle portion, and a hollow cylinder 33 connected to the hydraulic jack 32 and the hydraulic jack 32 installed up, down, left, and right near the front edge of the hydraulic jack support wall 31. ), And the after-injection bulkhead 34 installed on the front of the hollow cylinder 43,

The water jet spraying body 45 has a circular pipe shape at the rear side, and a trumpet tube shape having a wider diameter than the tube, and has a hollow cylinder 33 and a rear body bulkhead 34 of the screw auger drive shaft 30. Located on the front,

The front end of the water jet spray body 45 is sharply formed on the front surface, and a plurality of crushings are provided on the inclined surface of the water jet spray tip central portion 43 and the water jet spray tip central portion 43. A bit 41, a water jet spray nozzle 42 provided at a lower side of the water jet sprayer tip central portion 43, and the shredding bit 41;

The auger head 40 is installed outside the edge of the water jet spray tip central part 43 and includes a plurality of different shredding bits 41, and a water jet spray body body 45 connected to the auger head 40. It is a variable water jet micro shield propulsion device consisting of rubber packing for earth and sand inlet blocking 49 installed between).

The present invention as described above is a propulsion method mainly targeting D = 300mm to D = 800mm propulsion diameter microshield device for general soil promotion for general soils except for a specific aquifer ground and rock ground, amber stone ground, etc., which have high groundwater pressure. When encountering obstacles (underground box or concrete structure), steel (H-Beam, etc.), rock, amber ground, etc., the water jet spraying device is built in the auger head in front of the excavation leader. By easily crushing obstacles, the construction method and construction cost can be greatly reduced.

In addition, the excavation work using water jet is not applied to the general soil, but the excavation work using only the auger head device, and when the obstacle appears, the excavation work is performed using the water jet to reduce the construction cost and construction period. You can. In addition, when constructing a difficult construction section such as obstacle ground using water jet, it is possible to evenly crush the entire excavation surface of the leading ground while moving the variable water jet spraying body back and forth using hydraulic cylinder. The resistance and load on the head can be greatly reduced, and the excavation and propulsion speed is also increased.

Claims (6)

delete delete A forwarding device installed in the forward base E excavated on one side of the ground A to advance the apparatus and pipes, and a variable water jet spraying body and a variable water jet installed on the front of the forwarding device and penetrating the inside of the pipe. In the variable water micro-shield propulsion device comprising a rotary drive device for rotating the injection body and a fume pipe and a leader installed on the front of the rotary drive device to incorporate a variable water jet sprayer, the variable water jet sprayer Is rotated by the rotation of the drive shaft driver 20 and connected to the drive shaft crank 50, the screw auger drive shaft 30 of the cylindrical pipe shape installed through the interior of the fume pipe 60 and the conductor 70, and the A water jet injection body 45 provided on the front surface of the screw auger driving shaft 30, a screw auger 35 provided in a skew shape on the outside of the screw auger driving shaft 30 and the water jet injection body 45, remind Inside the screw auger drive shaft 30 is provided with a hollow portion in the center connected to the water pipe 7 so that the water jet injected from the water jet drive device 6, the water jet injection nozzle of the auger head 40 outside the end Variable water jet micro shield propulsion, characterized in that it comprises a (42). The method of claim 3, wherein the screw auger drive shaft 30 is connected to the hydraulic jack support wall 31 and the hydraulic jack 32 and the hydraulic jack 32 installed up, down, left and right near the front edge of the hydraulic jack support wall 31 in the middle portion. A variable water jet micro-shield propulsion device comprising a hollow side cylinder (33), and the injection body rear bulkhead (34) installed in front of the hollow side cylinder (43). The method of claim 3, wherein the water jet spraying body 45 has a circular pipe shape at the rear side, and a trumpet tube shape having a wider diameter than the tube, and the hollow cylinder 33 and the retracting body of the screw auger drive shaft 30 Located in front of the bulkhead 34, The front end of the water jet spray body 45 is sharply formed on the front surface, and a plurality of crushings are provided on the inclined surface of the water jet spray tip central portion 43 and the water jet spray tip central portion 43. A bit 41, a water jet spray nozzle 42 provided at a lower side of the water jet sprayer tip central portion 43, and the shredding bit 41; The auger head 40 is installed outside the edge of the water jet spray tip central part 43 and includes a plurality of different shredding bits 41, and a water jet spray body body 45 connected to the auger head 40. Variable water jet micro-shield propulsion device characterized in that it comprises a rubber packing (49) for earth and sand inlet interception installed between. In the propulsion method using a variable water jet micro shield propulsion device, First process (preparation process) By operating the hydraulic propulsion jack 13 powered by the hydraulic unit 2 in the forward base E, the propulsion system is moved forward by utilizing the force resisting the reaction wall using the cylinder 12 and the push rod 10. At the same time pushing to the part, A plurality of hydraulic jacks 32 and hollow side cylinders 33 installed in the screw auger drive shaft 30 operate the hydraulic jack support wall 31 as a reaction wall to operate the water jet spraying body 45 by operating the hydraulic jack 32. After moving forward and backward and placing it on the pre-excavation surface of the leading ground, 2nd process (excavation process) The compressor (4) connected to the water tank (3) and the abrasive tank (5) installed on the other side of the ground while rotating the propulsion shaft driver (20) by receiving power from the generator (1) and the hydraulic unit (2) located on the ground. By operating the water jet driving device 6 together, the high-speed water is blocked by the water jet spray nozzle 42 of the water jet spraying body 45 installed in front of the screw auger drive shaft 30 through the water pipe 7. At the same time as the high-speed spraying to crush using the water jet force, the auger head 40 with the screw auger drive shaft 30 and the crushing bit 41 is rotated to excavate the leading ground, and the earth and sand to the screw auger 35. Discharged to the rear by the back, by the screw auger is discharged to the back to the earthed soil is stacked through the soil discharge outlet 65 is carried to the ground portion to the bucket (not shown), If the excavation of a predetermined portion, the propulsion method using a variable water jet micro-shield propulsion device characterized in that the advance back to the excavated section in the same manner as in the first step, and then re-excavated as described above.

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