TW201713844A - Propulsion apparatus - Google Patents

Abstract

The present invention improves propulsion efficiency of a propulsion apparatus. The present invention provides a propulsion apparatus 1A, which is pressed into the ground by a propulsion tube T, so as to embed a small diameter tube comprised of a plurality of propulsion tubes T in the ground, wherein a ribon type screw conveyor constitutes a front-end conveyor that transports the dirt inside a chamber 7 to the back, and a radial centric position of a dirt discharging tube 10a in the front-end conveyor 10 is provided to align with a radially central portion of the propulsion apparatus 1A. Moreover, the size of an opening portion 3g, which constitutes a cutting head 3 of the front-end conveyor 10, is set to a maximum transportable rock diameter of the front-end conveyor 10. Accordingly, even a bigger rock can be put in the chamber 7 without being spalled by the cutting head 3, thereby preventing reduction of spall process for rocks and the like, therefore improving propulsion speed of the propulsion apparatus 1A. Thus, the propulsion efficiency of the propulsion apparatus 1A can be improved.

Description

Propulsion device

The present invention relates to a propulsion device, for example, to an efficient technique suitable for use in a propulsion device for burying a small diameter pipe.

The propulsion method is a method in which a propulsion device is pushed into the ground through a propulsion pipe disposed behind the propulsion device, thereby embedding the propulsion pipe in the ground. Here, Fig. 18 is a schematic configuration view showing a conventionally used propulsion device viewed from the side surface side, and Fig. 19 is a front view showing a cutter head of the propulsion device of Fig. 18. Here, the front surface (the surface facing the boring surface) of the propulsion device 50 is provided with a cutting head 51 in a state rotatable by the motor 52 in the propulsion device 50. Here, the front surface of the cutting head 51 is rotatably provided with a plurality of roller cutters 53 and the like for crushing the boulder in the ground, etc., and is formed to be used to crush the crusher. Gravel or earth sand or the like is taken in a plurality of openings 55 in a chamber 54 behind the cutting head 51. A cone crusher 56 is provided inside the propulsion device 50, and the cone crusher 56 is disposed in a state where its rotation shaft can rotate in unison with the rotation axis of the cutting head 51. The gravel or the like crushed by the cutting head 51 is permeable The opening portion 55 of the cutting head 51 is taken into the chamber 54 and further crushed by the cone crusher 56, and then sent to the drain pipe 58 through the valve 57, and then the mud is discharged through the sludge. The tube 58 is discharged to the outside. Further, regarding the propulsion device, for example, as disclosed in Patent Documents 1 and 2, a large gravel or the like which is crushed by a cutter attached to the front surface of the excavator has been disclosed by a belt screw conveyor (ribbon screw) Conveyor) The structure that is transported to the rear. Further, in Patent Documents 3 to 6, a configuration of an excavator used by the shield method is disclosed.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Laid-Open Patent Publication No. 59-76397

Patent Document 2: Japanese Patent Laid-Open Publication No. 2-23674

Patent Document 3: Japanese Laid-Open Patent Publication No. 2012-122257

Patent Document 4: Japanese Laid-Open Patent Publication No. 2012-122258

Patent Document 5: Japanese Laid-Open Patent Publication No. 2012-122259

Patent Document 6: Japanese Laid-Open Patent Publication No. 2012-122260

However, in the propulsion device exemplified in the above-mentioned Fig. 18 and the like, since the huge gravel of the tunneling surface is crushed by a roller cutter or the like on the front surface of the cutting head, and the cone crusher is housed in the chamber. The gravel is crushed into a gravel diameter that can be discharged, so the propulsion speed of the propulsion device is significantly limited, and as a result, the propulsion device is highly efficient. The problem of reduced size. In addition, in the case where there are many gravels in the area, there is a problem that the cutting head is worn or broken.

The present invention has been made in view of the above-described technical background, and an object thereof is to provide a technique for improving the propulsion efficiency of a propulsion device.

In order to solve the above problem, the propulsion device of the present invention described in the first aspect of the invention is that the device body is pushed in from the rear through the propulsion pipe toward the ground, thereby propelling the device body and embedding the propulsion pipe in the ground. The propulsion device includes: a cutting disc mounted on the front surface of the apparatus body in a rotatable state for excavating the excavation surface; and a receiving portion disposed in the apparatus body behind the cutting disc for The excavated earth sand taken in through the opening of the cutting disk; the first discharging means is disposed behind the receiving portion in the device body to transport the excavated soil in the receiving portion to the rear; and rotating The driving means is provided in the apparatus body in two or more outer circumferences of the first discharge means for rotating the cutting disk, and the first discharging means includes a first discharge pipe for forming the aforementioned inside of the housing portion. a conveying path for excavating the soil sand; and a shaftless spiral portion provided in the first discharge pipe in a rotatable state for conveying the first discharge pipe The first discharge means is provided such that the center position of the first discharge pipe in the radial direction is aligned with the center portion of the apparatus body in the radial direction; and the size of the opening of the cutting disk is The maximum transportable gravel diameter of the first discharge means is set.

Further, the invention according to claim 2 is the invention of claim 1, wherein the connection portion between the rotary driving means and the cutting disk is provided to provide excavation in the housing portion. The scraped portion of the sand.

The invention according to claim 3, wherein the second discharge means is provided in the second stage of the first discharge means, and the second discharge means is provided in the second discharge means. The means includes: a second discharge pipe connected to the first discharge pipe in a rotatable state; and a spiral wing portion fixed to an inner wall of the second discharge pipe.

The invention according to claim 4, wherein the third discharge means is provided in the subsequent stage of the first discharge means, and the third discharge means is provided in the third aspect of the invention. The means includes: a second discharge pipe connected to the first discharge pipe; and a pressure feeding means for pumping the excavated earth sand in the second discharge pipe to the rear.

The invention according to claim 5, wherein the fourth discharge means is provided in the rear stage of the first discharge means, and the fourth discharge means is provided in the fourth aspect of the invention. The method includes: a second discharge pipe connected to the first discharge pipe in a rotatable state; a spiral wing portion fixed to an inner wall of the second discharge pipe; and a pressure feeding means for the inside of the second discharge pipe Excavate the earth sand and send it to the rear.

In addition, the present invention described in claim 6 is the invention according to any one of claims 1 to 5, which is characterized in that the additive material injection means is used. Injecting at least one of a mud material and a bubble material into the excavation surface and the accommodation At least one of the inside and the first discharge means.

Further, the present invention described in claim 7 is the invention according to any one of the first to fifth aspects of the present invention, wherein the mud water injection means is provided in the apparatus The body is disposed at a rear of the accommodating portion for injecting muddy water into the accommodating portion.

According to the invention described in the first aspect of the patent application, since the crushing process can be reduced, the propulsion efficiency of the propulsion device can be improved.

According to the invention of the second aspect of the invention, since the soil or the like in the accommodating portion of the propulsion device can be favorably fed to the first discharge means, the propulsion efficiency of the propulsion device can be improved.

According to the invention of claim 3, since the earth pressure in the accommodating portion of the propulsion device can be stabilized and the torque or thrust of the cutting disk can be reduced, the propulsion efficiency of the propulsion device can be improved.

According to the invention described in claim 4, the device configuration can be simplified.

According to the invention of claim 5, the handling ability of the soil behind the propulsion device can be improved.

According to the invention described in claim 6 of the patent application, the handling ability of the soil can be improved.

According to the invention described in claim 7, the propulsion efficiency of the muddy water propulsion device can be improved.

1A, 1B‧‧‧ propulsion unit

2‧‧‧ device body

3‧‧‧ cutting head

3a‧‧‧ Panel Department

3b‧‧‧Roller Cutter

3bb‧‧‧ drill bit

3c‧‧‧ cutting teeth

3d‧‧‧Additive Material Injection Department

3e‧‧‧Outer Rings

3f‧‧‧Drill

3g‧‧‧ openings

3h‧‧‧Center drill bit

3hb‧‧‧ drill bit

5, 5a, 5b‧‧ ‧ cover panel

6‧‧‧ partition wall

7‧‧‧ chamber

8‧‧‧Additive material injection department

9‧‧‧Cutter Drive Department

9a‧‧‧Rotary motor

9b‧‧‧Communication gear

9c‧‧‧ Support shaft

9d‧‧‧Mixed wing

10‧‧‧ Front conveyor

10a, 10a1, 10a2‧‧‧ earth drain pipe

10b, 10b1, 10b2‧‧‧ shaftless spiral

10c‧‧‧Connector

10d‧‧‧Additive material injection department

11‧‧‧ articulated thousand gold top

15A, 15B, 15C‧‧‧ rear conveyor

15t‧‧‧ earth pipe

15s‧‧‧Spiral wing

15p‧‧‧Additive Material Injection Department

20‧‧‧Pushing table

21‧‧‧ Pressure wall

22‧‧‧ Pushing the top of the golden dome

25‧‧‧Send mud pipe

26‧‧‧Drain pipe

27‧‧‧Opening and closing department

50‧‧‧ propulsion device

51‧‧‧ cutting head

52‧‧‧Motor

53‧‧‧Roller cutter

54‧‧‧ chamber

55‧‧‧ openings

56‧‧‧Cone crusher

57‧‧‧ valve

58‧‧‧Drain pipe

Cx, Cy, Cz‧‧‧ center line

G‧‧‧Foundation

Gr‧‧‧Gravel

Gs‧‧‧ soil sand

HA‧‧‧ arrives at the vertical pit

HS‧‧‧ starting vertical pit

MH‧‧‧ manhole

P1, P2‧‧‧ arrows

R1, R2‧‧‧ diameter

T‧‧‧ propulsion pipe

TS‧‧‧Small diameter tube

Fig. 1 is a schematic configuration view showing an example of a propulsion device according to an embodiment of the present invention as seen from the side surface side.

Fig. 2 is a front view showing an example of a cutting head of the propulsion device of Fig. 1.

Fig. 3 is a schematic configuration view showing an example of the cutting head of Fig. 2 as seen from the side surface side.

Fig. 4(a) is a cross-sectional view of a main portion along a longitudinal direction of a drain pipe constituting a conveyor behind a propulsion device, and Fig. 4(b) is a cross-sectional view taken along line I-I of Fig. 4(a).

Figure 5 (a) is a cross-sectional view of the main part of the foundation along the planned pipe line in the propulsion project, and (b) is the foundation along the planned pipe line in the propulsion project of Figure 5 (a). The main part is a sectional view.

Figure 6(a) is a cross-sectional view of the main part of the foundation along the planned pipe line in the propulsion project in Figure 5(b), and (b) in the advancement of the propulsion project in Figure 6(a) A cross-sectional view of the main part of the foundation of the planned pipe line.

Figure 7(a) is a cross-sectional view of the main part of the foundation along the planned pipe line in the propulsion project in Figure 6(b), and (b) in the advancement of the propulsion project in Figure 7(a). A cross-sectional view of the main part of the foundation of the planned pipe line.

Figure 8(a) is a cross-sectional view of the main part of the foundation along the planned pipe line in the propulsion project in Figure 7(b), and (b) in the advancement of the propulsion project in Figure 8(a). A cross-sectional view of the main part of the foundation of the planned pipe line.

Figure 9(a) is a cross-sectional view of the main part of the foundation along the planned pipe line in the propulsion project in Figure 8(b), and (b) in the advancement of the propulsion project in Figure 9(a) A cross-sectional view of the main part of the foundation of the planned pipe line.

Figure 10 (a) is a cross-sectional view of the main part along the length of the drain pipe of the rear conveyor when the pebble layer with a small amount of binder is excavated, (b) is the figure of Fig. 10 (a) A cross-sectional view of the line.

Figure 11 (a) is a cross-sectional view of the main part along the length of the earthmoving pipe of the rear conveyor when excavating the pebble layer with a large amount of the adhesive, and (b) is a sectional view of the line II of Fig. 11(a) .

Fig. 12 is a front elevational view showing an example of a cutting head of a propulsion device according to another embodiment of the present invention.

Fig. 13 is a schematic configuration view showing an example of the cutting head of Fig. 12 viewed from the side surface side.

Fig. 14(a) is a cross-sectional view showing the main part of a longitudinal direction of a drain pipe constituting a conveyor belt connected to a propulsion device according to another embodiment of the present invention, and (b) showing Fig. 14(a); Sectional view of line II-II.

Figure 15 (a) is a cross-sectional view of the main part of the length of the earth-moving pipe of the conveyor in the subsequent stage of the 14th figure when the pebble layer or the clay layer and the sandy soil layer are excavated, (b) Fig. 15 is a cross-sectional view taken along line II-II of (a).

Figure 16 (a) is a cross-sectional view of the main part of the length of the earthen pipe along the rear conveyor when the pebble layer or clay layer and the sandy soil layer are excavated, and (b) is the 16th figure ( A) A cross-sectional view of line II.

Fig. 17 is a schematic configuration view showing an example of a propulsion device according to another embodiment of the present invention as seen from the side surface side.

Fig. 18 is a schematic configuration view of a conventionally used propulsion device viewed from the side surface side.

Figure 19 is a front elevational view of the cutting head of the propulsion device of Figure 18.

Hereinafter, an embodiment which is an example of the present invention will be described in detail based on the drawings. In the drawings, the same components are denoted by the same reference numerals, and the repeated description thereof will be omitted.

(First embodiment)

First, a configuration example of the propulsion device of the present embodiment will be described with reference to Figs. 1 to 3 . Fig. 1 is a schematic configuration view showing an example of a propulsion device according to an embodiment of the present invention as seen from the side surface side. Fig. 2 is a front view showing an example of a cutting head of the propulsion device of Fig. 1. Fig. 3 is a schematic configuration view showing an example of the cutting head of Fig. 2 as seen from the side surface side. Fig. 4(a) is a cross-sectional view of a main portion along a longitudinal direction of a drain pipe constituting a conveyor behind a propulsion device, and Fig. 4(b) is a cross-sectional view taken along line I-I of Fig. 4(a). Further, the symbols Cx, Cy, and Cz indicate the center line of the propulsion device.

The propulsion device 1A of the present embodiment is a soil pressure type propulsion device, for example, a small-diameter pipe having a diameter of 700 mm or less (a sewer pipe, a water pipe, a gas pipe, a pipe for a wire, or a pipe for a communication line). Etc.) buried in the ground by advancing the work method. The propulsion device 1A is suitable for excavating a hard soil layer containing pebbles mixed with large gravel mixed with gravel or pebbles, and is also suitable for excavating hard soil containing pebbles mixed with gravel or pebbles or gravel not mixed with huge gravel. The situation of the layer. In addition, the propulsion pipe T disposed at the rear end of the propulsion device 1A is small in composition. The components of the caliber pipe. The pusher tube T is made of, for example, a cylindrical tube made of reinforced concrete, and has an outer diameter of, for example, 540 mm and an inner diameter of, for example, 400 mm.

The propulsion device 1A is formed, for example, in an elongated cylindrical shape along the advancing direction, and includes a device body 2 and a cutting head (cutting disk) 3. Further, the total length of the propulsion device 1A is, for example, 2,766 mm. Further, the diameter (outer diameter) of the apparatus body 2 is, for example, 560 mm, and the diameter (tooth outer diameter) of the front surface of the cutting head 3 is, for example, 585 mm.

The skin plate 5 forming the outer casing of the apparatus main body 2 is connected in series by, for example, two cover panels 5a and 5b formed of a hollow cylindrical steel pipe along the extending direction of the propulsion device 1A. And constitute. On the front end side of the cover panel 5, a partition wall 6 that divides the hollow space in the apparatus main body 2 into the excavation surface side and the machine inner side is provided at a position retreated from the front end to the inside of the apparatus main body 2.

In the hollow space in the apparatus body 2, on the side of the boring surface (that is, between the cutting head 3 and the partition wall 6), a chamber for accommodating the earth sand (excavated soil) excavated by the cutting head 3 is provided ( Chamber) (housing unit) 7. On the other hand, in the hollow space in the apparatus main body 2, the additive injection portion 8, the cutter driving portion 9, the front conveyor (first discharge means) 10, the hinged gold dome 11, and the earth pressure are provided inside the machine. A detection unit (not shown), a blocking monitoring unit (not shown), and the like.

The additive material injection unit 8 is a mechanism for injecting an additive into the chamber 7 in order to optimize the state of the soil in the chamber 7 or to adjust the earth pressure in the chamber 7, and has a high-pressure hose (hose) ) with a check valve. The high pressure hose is an injection pipe for injecting an additive into the chamber 7, and The injection port is exposed in a state set in the chamber 7. The check valve is used to prevent the mud or the like of the chamber 7 from flowing back to the valve inside the machine.

For the additive, for example, a bentonite solution or the like is used as a clay material, a bubble material, or both. By using the bentonite solution as the main added mud material, the water impermeability and plastic fluidity (freely deformable and movable properties) of the soil in the chamber 7 can be improved. In addition, by excavating the gravel part of the soil sand and the sand together, the separation of the gravel part from the soil sand is suppressed, and the integration of the soil sand and the gravel part in the excavated soil sand can be improved. Thereby, the handling capacity of the soil and the like can be improved.

Further, by adding the bubble material, it is possible to suppress or prevent the soil from adhering to the wall surface of the cutting head 3 or the chamber 7. Further, by the cushioning action of the bubble material, the compressibility of the excavated soil sand or the mud material can be improved, so that the gravel portion can be suppressed from rolling in the chamber 7 or in the front conveyor 10. Further, even if the gravel portion rolls in the chamber 7 or in the front conveyor 10, the rapid fluctuation of the mud pressure can be suppressed by the cushioning action of the bubble material. Further, by applying a bubble material, water repellency can be improved.

When both the soil material and the bubble material are used, the soil material and the bubble material can be mixed in the vicinity of the injection port of the high-pressure hose of the additive material injection unit 8, and the timing of the injection can be shifted between the soil material and the bubble material. . When the soil material is used together with the bubble material, the stability of the earth pressure can be improved, so that the stability of the road surface can be maintained. Further, since the soil discharged by the gravel portion by the front conveyor 10 can be smoothed, the occurrence of clogging or ejection in the front conveyor 10 can be prevented. Furthermore, it is also possible to suppress the separation of the bubble material which hinders the adhesion of the particles of the soil sand to each other. use.

The amount of the earth material to be injected is preferably set to be 30% or more of the amount of soil sand discharged from the chamber 7 by the front conveyor 10. In this way, the excavated soil sand including the gravel portion such as gravel or pebbles crushed by the massive gravel can be enclosed with the excavated earth sand to suppress the separation of the gravel portion from the soil sand, thereby improving the sand. The unity of the sand and gravel parts. The upper limit of the amount of the earth material to be poured is preferably set according to the condition of the hard soil layer of the object.

When the amount of the bubble material is applied to the gravel layer or the like, it is usually 40% or more with respect to the unit soil amount in the bubble state. Therefore, it is estimated that the amount of fine particles due to the injection of the mud material is increased. The amount can be. The amount of the bubble material to be injected (more specifically, the amount of the bubble material stock solution before foaming) is set to be 3% or more with respect to the amount of soil discharged from the chamber 7 by the front conveyor 10 good. Thereby, the bearing effect due to the interaction with the soil material can be obtained, and the compressibility of the excavated soil sand including the gravel portion crushed by the huge gravel can be improved, and the soil pressure can be prevented. Impulsive changes. Regarding the bubble material, the upper limit of the injection amount is preferably set in accordance with the condition of the hard soil layer of the object.

The cutter driving unit 9 is a rotation driving means for rotating the cutting head 3, and includes a rotation motor 9a, a transmission gear 9b, and a support shaft (connection portion) 9c. The rotary motor 9a is, for example, a hydraulic or electric rotary drive source, and two or more (for example, two to three) are arranged side by side along the outer circumference of the front conveyor 10. The transmission gear 9b is a gear that transmits the rotation operation of the rotary motor 9a to the support shaft 9c. Support shaft 9c for driving the cutter The moving portion 9 is mechanically coupled to the cutting head 3 and supports the cutting head 3 in a rotatable state. In the support shaft 9c, on the outer circumference of the chamber 7, a kneading blade (scraping portion) 9d is integrally formed with the support shaft 9c. The support shaft 9c and the kneading blade 9d have a function of causing soil having water impermeability and plastic fluidity by mixing and mixing the excavated soil sand or the like in the chamber 7 with the additive. Further, the kneading blade 9d mainly has a function of scraping off the soil accumulated in the bottom portion of the chamber 7 and feeding it to the front conveyor 10. Thereby, the soil in the chamber 7 can be favorably fed into the front conveyor 10, so that the propulsion efficiency of the propulsion device 1A can be improved.

The front conveyor 10 is configured to convey the soil or the like in the chamber 7 to the conveyance mechanism portion behind the propulsion device 1A, for example, by a belt type screw conveyor having no rotation shaft having a diameter of about 200 to 250 mm. In the case of a screw conveyor having a rotating shaft, it is liable to block due to gravel or the like. In contrast, in the case of a belt screw conveyor, the maximum diameter (maximum transportable gravel diameter) of the transportable gravel or the like can be obtained. Since it is set to have a radius of the conveyance path or more, it is also possible to convey gravel or the like of a size that cannot be conveyed by a screw conveyor having a rotary shaft. In the propulsion device 1A of the present embodiment, for example, even a large-diameter pebble having a diameter of about 100 to 150 mm or the like can be taken into the chamber 7 without being crushed. Therefore, the crushing process of the pebble or the like can be reduced, so that the advancing speed of the propulsion device 1A can be improved. Therefore, the efficiency of the propulsion device 1A can be improved.

In addition, the front stage conveyor 10 is provided in a state in which the center position in the radial direction of the earth discharge pipe (first discharge pipe) 10a constituting the front stage conveyor 10 is aligned with the center portion in the radial direction of the apparatus main body 2 (cover panel 5). Again, before The segment conveyor 10 is disposed in a state of extending along the center line Cz of the apparatus body 2. In the propulsion device 1A, a plurality of cutter driving units 9 are disposed on the outer circumference of the earthmoving pipe 10a of the front conveyor 10, so that the radial center position of the earth-moving pipe 10a is largely shifted from the center portion of the main body 2 in the radial direction. At this time, the diameter of the propulsion device 1A has to be increased, and the propulsion device 1A cannot be applied to the burying work of the small-diameter pipe. In this regard, in the propulsion device 1A of the present embodiment, the earth drain pipe 10a of the front conveyor 10 is disposed in a state in which the radial center position is aligned with the center portion of the device body 2 in the radial direction, thereby reducing Since the diameter of the small propulsion device 1A is small, the propulsion device 1A can be applied to the burying work of the small-diameter pipe. In addition, the center portion of the apparatus main body 2 in the radial direction includes the center of the radial direction of the apparatus main body 2, and the diameter of the propulsion device 1A can be applied to the burying work of the small-diameter tube, and includes the sub-device. The center of the body 2 is offset by a number of positions.

The earth drain pipe 10a constituting the front stage conveyor 10 is a pipe for conveying the soil or the like in the chamber 7 to the rear conveyance path, and has, for example, two earth drain pipes 10a1 and 10a2. The earth-moving pipes 10a1 and 10a2 are formed, for example, of a cylindrical steel material, and are connected in series along the extending direction of the propulsion device 1A. The opening of the front end of the earth drain pipe 10a (10a1) penetrates the partition wall 6 and is exposed in the chamber 7. Further, the inner diameter of the earth drain pipe 10a is, for example, about 200 mm.

Inside the earth drain pipe 10a, a shaftless spiral portion 10b is provided in a state of being rotatable along the inner circumference of the earth drain pipe 10a. The shaftless spiral portion 10b is pressed by the earth in the earth drain pipe 10a by the rotation operation thereof. The conveying member that is transported to the rear has, for example, two non-axis helical portions 10b1 and 10b2. The shaftless spiral portions 10b1, 10b2 are connected in series along the extending direction of the propulsion device 1A.

The shaftless spiral portion 10b1 is provided in the earth drain pipe 10a1 in a state of being rotatable by a hydraulic rotary motor (not shown) or the like. The rotary motor for rotationally driving the shaftless spiral portion 10b1 is disposed adjacent to the rotary motor 9a of the cutter drive unit 9. A part of the front end of the shaftless spiral portion 10b1 protrudes into the chamber 7. On the other hand, the rear shaftless spiral portion 10b2 is provided in the earth drain pipe 10a2 in a state of being rotatable by a hydraulic rotary motor (not shown) or the like. A rotary motor for rotationally driving the shaftless spiral portion 10b2 is disposed adjacent to the hinged gold dome 11.

Further, the joints of the earth-moving pipes 10a1, 10a2 are disposed at the position of the hinged gold dome 11, and the joint portion 10c is provided on the outer periphery of the joint. The joint portion 10c is formed, for example, by a flexible member, and has deformation in synchronization with the hinge operation of the propulsion device 1A by the hinged gold dome 11, and prevents the soil in the earth discharge pipe 10a from being caused by the hinge operation. The function of leaking to the outside. Further, when the shaftless spiral portion 10b2 is omitted (when the shaftless spiral portion 10b is constituted by one), the joint portion 10c is not required.

Further, a plurality of additive material injection portions 10d are provided on the outer circumference of the position in the middle of the direction in which the earthmoving pipe 10a extends. The additive material injection unit 10d is configured to optimize the state of the soil in the earth-moving pipe 10a or to inject the component of the additive material into the earth-moving pipe 10a in order to adjust the earth pressure in the chamber 7, and is the same as the additive-injection unit 8 described above. Ground with high pressure hose and counter Stop the valve. The injection port of the high-pressure hose of the additive material injection unit 10d is exposed in the earth drain pipe 10a (10a1, 10a2). The addition material is the same as that described in the additive material injection unit 8, and therefore the description thereof will be omitted.

In the rear end portion of the earth-moving pipe 10a (10a2), a drain pipe (second discharge pipe) 15t that connects the rear conveyor 15A (second discharge means) in a state of extending in the axial direction of the propulsion device 1A . The rear conveyor 15A is a conveyance mechanism that conveys the soil that is conveyed by the pressing action of the shaftless spiral portion 10b that is rotated in the front conveyor 10, and is conveyed toward the starting vertical pit, as shown in FIG. As shown in Fig. 4, the earth drain pipe (second discharge pipe) 15t and the spiral wing portion 15s provided (fixed) to the inner wall surface thereof are provided. The earth drain pipe 15t is formed, for example, by a cylindrical steel material, and is provided in a state of being rotatable along the circumferential direction of the earth drain pipe 10a. Thereby, when the earth-moving pipe 15t is rotated, the spiral wing portion 15s also rotates, so that the soil or the like in the earth-moving pipe 15t can be transported to the outside of the machine. Further, the diameter of the earth discharging pipe 15t is, for example, 200 to 250 mm.

As shown in Fig. 1, an additive injection portion 15p is also provided on the outer periphery of the vicinity of the rear end of the earth drain pipe 10a (10a2). The additive material injection unit 15p is configured to optimize the state of the soil in the earth-moving pipe 15t or to inject the component of the additive material into the earth-moving pipe 15t in order to adjust the earth pressure in the chamber 7, and is the same as the additive-injection unit 8 described above. Ground, with high pressure hose and check valve. The injection port of the high-pressure hose of the additive material injection portion 15p is exposed in the earth drain pipe 10a (10a2). The addition material is the same as that described in the additive material injection unit 8, and therefore the description thereof will be omitted.

The hinged gold dome 11 is used to connect the cover panels 5a, 5b, Further, the machine for correcting the propulsion direction of the propulsion device 1A is provided, and a plurality of the inner walls of the cover panel 5 are arranged side by side in the circumferential direction of the propulsion device 1A at a position crossing the boundary between the cover panels 5a and 5b. By advancing the propelling device 1A by supplying the pressurized oil to the hinged gold dome 11 and bending the cover panels 5a, 5b in a predetermined direction and angle, the propulsion direction of the propulsion device 1A can be controlled.

The earth pressure detecting portion (not shown) is a sensor portion that converts the pressure formed by the soil in the chamber 7 into an electric signal by the strain gauge, and faces the chamber with the earth pressure detecting surface State setting within 7. The propulsion device 1A is managed so that the earth pressure in the chamber 7 detected by the earth pressure detecting unit becomes a predetermined value range, whereby the excavation process can be performed while maintaining the stability of the excavation surface.

The occlusion monitoring unit (not shown) is a component for monitoring the clogging of the soil sand between the chamber 7 and the front conveyor 10. The tendency of the soil sand to block is estimated by raising the temperature of the soil sand due to the frictional heat of the soil sand which is retained by the stirring or the like. The occlusion monitoring unit has a temperature sensor provided on the outer side of the front stage conveyor 10, and a control panel. The temperature sensor is a sensor that measures the temperature of the earth sand containing the gravel portion carried by the front conveyor 10 from the outside of the front conveyor 10. The control panel is a component having a function of displaying the temperature of the soil sand measured by the temperature sensor. The soil temperature of the temperature sensor is compared with the set temperature for blocking estimation, and is input to the control panel as a material for preventing the feed forward control from being blocked. When the temperature of the soil sand is determined to have a tendency to rise in temperature toward the set temperature, that is, manual control or borrowing by the operator The additive material injected into the chamber 7 from the additive injection portion 8 or the like is added by the automatic control by the control panel.

On the other hand, the above-described cutting head 3 is a member for excavating the tunneling surface of the hard soil layer, and is supported on the front surface of the apparatus body 2 in a state of being rotatable along the outer circumference of the cover panel 5 (relatively The face of the road surface). On the front surface of the cutting head 3, for example, a flat cross-shaped panel portion 3a is provided. In the panel portion 3a, for example, a plurality of cylindrical roller cutters 3b are rotatably mounted. Each of the roll cutters 3b is an excavating member for excavating the excavation face, and a plurality of bits 3bb are fixed to the surface thereof. Further, a scraper tooth 3c is provided on the outer edge of the panel portion 3a. Further, instead of the cylindrical roller cutter 3b, a cone head type or other excavating member such as a rectangular drill may be provided.

Further, an additive injection portion 3d is provided in the vicinity of the center of the panel portion 3a. The additive injection portion 3d is configured to optimize the state of the soil in the chamber 7 or to inject the additive into the heading surface of the front surface of the cutting head 3 in order to adjust the soil pressure in the chamber 7. Similarly, the additive material injection unit 8 has a high pressure hose and a check valve. The addition material is the same as that described in the additive material injection unit 8, and therefore the description thereof will be omitted.

Further, on the outer circumference of the cutting head 3, an annular outer circumferential ring portion 3e is provided so as to contact the extending end portions of the cross-shaped panel portion 3a. A plurality of drills 3f are provided on the front surface of the outer peripheral ring portion 3e on the side of the tunneling surface. Furthermore, in the inner circumference of the outer peripheral ring portion 3e and the panel portion An opening portion 3g that penetrates the front surface and the rear surface of the cutting head 3 is formed between the outer circumferences of 3a. The opening 3g is a through hole for taking in the excavated soil sand excavated through the cutting head 3 into the chamber 7, and is formed, for example, in the front end surface (surface facing the excavation surface) of the cutting head 3. In 4 locations. In the present embodiment, the size of the opening 3g of the cutting head 3 (for example, the diameter R1 indicated by the two-dot chain line in Fig. 2) is set to the maximum transportable gravel diameter of the preceding conveyor 10. Thereby, for example, even a large gravel having a diameter of 100 to 150 mm can be taken into the chamber 7 without being crushed by the cutting head 3. Therefore, the crushing process of the pebble or the like can be reduced, so that the advancing speed of the propulsion device 1A can be improved. Further, since the wear or breakage of the cutting head 3 (bit) can be reduced, the steps of repairing the cutting head 3 (bit) can be reduced. Thereby, the propulsion efficiency of the propulsion device 1A can be improved. In addition, the cost of excavation works can be reduced.

Next, an example of the propulsion method of the present embodiment will be described with reference to Figs. 5 to 9 . Figures 5 through 9 are cross-sectional views of the main parts of the foundation along the planned pipe line in the propulsion project. Further, in order to facilitate viewing of the drawings, the front conveyor 10 and the rear conveyor 15 are omitted.

First, as shown in Fig. 5(a), the starting vertical pit HS intersecting the ground of the foundation G and the vertical pit HA are mined. Next, after the pusher table 20 is provided at the bottom of the starting vertical pit HS, a pressing machine such as the pressure supporting wall 21 and the pushing crown 22 is provided above it. Then, as shown in FIG. 5(b), the propulsion unit 1A is mounted on the propulsion table 20 in the starting vertical pit HS by using a crane or the like.

Next, as shown in Fig. 6(a), the cutting head 3 is rotated. In the rotated state, the rear end of the propulsion device 1A is pushed by pushing the gold dome 22, whereby the propulsion device 1A is pushed from the inner wall surface of the starting vertical pit HS to the foundation G. At this time, the additive material is injected from the additive injection portions 3d, 8 and the like. Therefore, the soil sand including the gravel portion crushed by the cutting head 3 of the propulsion device 1A is stirred and mixed with the additive material injected from the additive material injection portion 3d toward the excavation surface by the rotation action of the cutting head 3. It is taken into the chamber 7 of the propulsion device 1A. The soil sand containing the gravel portion taken into the chamber 7 is stirred and mixed with the additive material injected into the chamber 7 from the additive material injection portion 8. Further, it is generated in the chamber 7 and filled with soil having water impermeability and plastic fluidity, thereby generating a soil pressure against the earth pressure of the tunneling surface, and causing the earth pressure to act on the entire tunneling surface. Further, the rotational speed of the cutting head 3 is maintained constant and the advancing speed of the propulsion device 1A or the rotational speed of the shaftless spiral portion 10b of the front conveyor 10 is adjusted, thereby being measured by a earth pressure gauge provided on the partition wall 6. The earth pressure in the chamber 7 is maintained at a constant pressure. Thereby, the propulsion device 1A can be advanced while stabilizing the excavation surface.

Here, in the case where the foundation G contains geological conditions of gravel or pebbles, it is not efficient and practical to crush and push the gravel and the like all finely. In this regard, in the present embodiment, for example, even a large gravel having a diameter of 100 to 150 mm can be taken into the chamber 7 without being crushed by the cutting head 3. Therefore, the crushing process of the pebble or the like can be reduced, so that the advancing speed of the propulsion device 1A can be improved. Further, since the wear or breakage of the cutting head 3 (bit) can be reduced, the steps of repairing the cutting head 3 (bit) can be reduced. Thereby, the advancement of the propulsion device 1A can be improved. effectiveness. Further, in the case of the propulsion device 50 shown in Fig. 18, the daily intake amount is 2.0 m/single shift at the time of smoothness, and the propulsion speed is 2 to 3 mm/min. On the other hand, the propulsion device of the present embodiment In 1A, the daily feed amount can be, for example, 5.0 m/single shift or more, and the advancement speed can be set to, for example, 10 mm/min or more.

Next, as shown in FIG. 6(b), after pushing the propulsion device 1A to the ground G, a cylindrical propulsion pipe T made of reinforced concrete is mounted in the starting vertical pit HS by using a crane or the like. On the propulsion table 20. Thereafter, as shown in Fig. 7(a), the rear end of the propulsion pipe T is pushed by pushing the crown 12, whereby the propulsion pipe T is pushed from the inner wall surface of the starting pit HS to the foundation G and the propulsion device 1A advancement. At this time, the propulsion device 1A is propelled while stabilizing the excavation surface in the same manner as described in Fig. 6(a). Further, in this case as well, as described above, for example, even a large gravel having a diameter of 100 to 150 mm can be taken into the chamber 7 without being crushed by the cutting head 3, and the impact of the pebbles or the like can be reduced. The crushing process can thereby increase the advancement speed of the propulsion device 1A. Further, since the wear or breakage of the cutting head 3 (bit) can be reduced, the steps of repairing the cutting head 3 (bit) can be reduced. Thereby, the propulsion efficiency of the propulsion device 1A can be improved.

Next, as shown in FIG. 7(b), after the pusher pipe T is pushed into the ground G, a new propulsion pipe T is mounted on the propulsion stage 20 in the starting vertical pit HS using a crane or the like. Thereafter, in the same manner as described above, the rear end of the new propulsion pipe T is pushed by pushing the gold dome 22, whereby the new propulsion pipe T is pushed from the inner wall surface of the starting vertical pit HS to the foundation G, and will be advanced. The device 1A is further advanced. At this time, the propulsion device 1A is propelled while stabilizing the excavation surface in the same manner as described in Fig. 6(a). Further, in this case as well, as described above, for example, even a large gravel having a diameter of 100 to 150 mm can be taken into the chamber 7 without being crushed by the cutting head 3, and the impact of the pebbles or the like can be reduced. The crushing process can thereby increase the advancement speed of the propulsion device 1A. Further, since the wear or breakage of the cutting head 3 (bit) can be reduced, the steps of repairing the cutting head 3 (bit) can be reduced. Thereby, the propulsion efficiency of the propulsion device 1A can be improved.

In this way, the propulsion pipe T is connected and the advancing step is repeated every time the propulsion pipe T is advanced, whereby, as shown in Fig. 8(a), after the propulsion device 1A is pushed out into the vertical pit HA, As shown in Fig. 8(b), the propulsion device 1A that has reached the vertical pit HA is removed by a crane or the like, and a new propulsion pipe T is mounted on the propulsion table 20 in the starting vertical pit HS using a crane or the like.

Next, as shown in Fig. 9(a), the rear end of the propulsion pipe T in the starting vertical pit HS is pushed by pushing the gold dome 22, thereby connecting the small diameter pipe TS composed of the plurality of propulsion pipes T. Buried in the foundation G. Thereafter, as shown in Fig. 9(b), the manhole MH is constructed in the starting vertical pit HS and reaches the vertical pit HA to complete the burying work of the small diameter pipe TS.

As described above, in the propulsion method of the present embodiment, the propulsion efficiency in the propulsion step which is repeatedly performed when the small-diameter pipe TS is buried can be improved. Further, since the life of the excavating member can be increased by the reduction of the crushing process of the tunneling surface, the steps of repairing the excavating member and the like can be reduced. Thereby, the burial period of the small-diameter tube TS can be shortened. In addition, Reduce the cost of burying the small diameter pipe TS.

Next, an example of the soil discharging state of the rear conveyor 15A in the advancing step will be described with reference to Figs. 10 and 11 . Further, an arrow P1 indicates the rotation direction of the earth discharge pipe 15t, and an arrow P2 indicates the earth discharge direction.

Fig. 10(a) is a cross-sectional view of the main part along the length of the earthmoving pipe of the rear conveyor when excavating the pebble layer with a small amount of the adhesive, and Fig. 10(b) is the figure of Fig. 10(a) A cross-sectional view of the line. In this case, the gravel Gr is often contained in the earth-moving pipe 15t, and there is almost no soil sand. Therefore, by adding the additive to the earth-moving pipe 15t through the additive-injecting portion 15p (see FIG. 1), it is possible to promote as much as possible. Plastic fluidization in the earth drain pipe 15t.

Next, Fig. 11(a) is a cross-sectional view of a main portion along the length direction of the earthmoving pipe of the rear conveyor when excavating the pebble layer having a large amount of the binder, and Fig. 11(b) is an eleventh figure (a) Sectional view of line II. At this time, the earth-soil Gs in the earth-moving pipe 15t is not full, but is about 1/2 to 1/3 of the cross-section of the earth-moving pipe 15t. At this time, the additive material is also added to the earth drain pipe 15t through the additive material injection portion 15p (see FIG. 1), whereby the plastic fluidization in the earth drain pipe 15t can be promoted as much as possible. Further, when the soil adheres to the periphery of the earthmoving pipe 15t by its viscous property, it is attached to the rear of the front conveyor 10, and water is added until the pebbles are separated from the soil.

(Second embodiment)

Fig. 12 is a front view showing an example of a cutting head of a propulsion device according to another embodiment of the present invention, and Fig. 13 is a schematic configuration view showing an example of a cutting head of Fig. 12 viewed from a side surface side.

The propulsion device 1A of the present embodiment is an example of a device in which the diameter of the opening portion 3g is smaller than the diameter R2 of the opening to be excavated, and the cutting head 3 is the same as the first embodiment. The structure is different. A center bit 3h is provided in the center of the cross-shaped panel portion 3a on the front surface of the cutting head 3. In the center drill bit 3h, a plurality of drill bits 3hb are fixed. Further, in the panel portion 3a, for example, two disk-shaped roller cutters 3b are rotatably mounted.

In the present embodiment, four openings 3g penetrating the front surface and the rear surface of the cutting head 3 are provided between the inner circumference of the outer peripheral ring portion 3e and the outer periphery of the panel portion 3a, and the size of the opening portion 3g is For example, the diameter R2) shown by the two-point chain line in Fig. 12 is set to the maximum transportable gravel diameter of the preceding stage conveyor 10. Thereby, for example, even a large gravel having a diameter of 100 to 150 mm can be taken into the chamber 7 without being crushed by the cutting head 3. Therefore, the crushing of the pebble or the like can be reduced, so that the advancing speed of the propulsion device 1A can be improved. Further, since the wear or breakage of the cutting head 3 (bit) can be reduced, the steps of repairing the cutting head 3 (bit) can be reduced. Thereby, the propulsion efficiency of the propulsion device 1A can be improved.

(Third embodiment)

Fig. 14(a) is a cross-sectional view showing the main part of a longitudinal direction of a drain pipe constituting a conveyor belt connected to a propulsion device according to another embodiment of the present invention, and Fig. 14(b) is a 14th view. (a) Sectional view of line II-II.

In the present embodiment, a modification of the rear conveyor will be described. In the present embodiment, it is not in the rear conveyor 151B. (The third discharge means) The shaftless spiral portion is provided, and instead of the earth drain pipe 15t, a soil pressure feed portion 15e is provided. The soil pressure-fed portion 15e is a component that conveys the soil or the like in the earth-moving pipe 15t in the discharge direction P2 so that the compressed gas or the added material or the like is injected into the earth-moving pipe 15t, and along the earth-moving pipe 15t. The length direction is set at every predetermined interval. At this time, the earth drain pipe 15t is fixed without being rotated.

Here, Fig. 15(a) is a cross-sectional view of the main part of the length of the earthing pipe of the conveyor in the subsequent stage of Fig. 14 when the pebble layer or the clay layer and the sandy soil layer are excavated. Fig. 15(b) is a cross-sectional view taken along line II-II of Fig. 15(a). At this time, plastic flow in the earth discharge pipe 15t is promoted as much as possible by adding the additive to the earth drain pipe 15t through the additive material injection portion 15p (see FIG. 1). Further, by injecting the compressed gas or the added material into the earth discharge pipe 15t through the earth pressure feeding portion 15e, the discharge of the soil containing the gravel Gr or the soil sand Gs in the earth discharge pipe 15t can be promoted. Here, the earth drain pipe 15t of the rear conveyor 15 is filled with soil sand or the like, whereby the stability of the earth pressure in the chamber 7 can be maintained while maintaining the plastic fluidity of the soil or the like at a high level. Reduce the torque or thrust of the cutting head 3. Therefore, the propulsion efficiency of the propulsion device 1A can be improved. Further, the soil excavated by the propulsion device 1A can be well discharged toward the starting vertical pit.

In the present embodiment, the rotation mechanism for rotating the earth discharge pipe 15t of the rear conveyor 15B can be eliminated, so that the size, weight, and simplification of the device can be pushed. Therefore, the cost of the device can be reduced.

(Fourth embodiment)

Fig. 16(a) is a cross-sectional view of the main part along the length of the earthmoving pipe of the rear conveyor when excavating the pebble layer or the clay layer and the sandy soil layer with a very large amount of the binder, Fig. 16(b) A cross-sectional view taken along line II of Fig. 16(a).

In the present embodiment, a modification of the rear conveyor will be described. In the present embodiment, the soil pressure feeding portion 15e is provided on the front end surface side of the earthmoving pipe 15t of the rear conveyor 15C (fourth discharging means), and the earth pressure feeding portion 15e is for compressing gas or adding mud. The material or the like is poured into the earth drain pipe 15t, and the soil or the like in the earth drain pipe 15t is conveyed in the discharge direction P2. In the same manner as the subsequent conveyor 15A described in the fourth embodiment of the first embodiment, the inner wall of the earthmoving pipe 15t constituting the rear conveyor 15C is provided with a spiral wing portion 15s, and is provided so that the earthing pipe is disposed. 15t rotation.

At this time, plastic flow in the earth discharge pipe 15t is promoted as much as possible by adding the additive to the earth drain pipe 15t through the additive material injection portion 15p (see FIG. 1). Further, the earth drain pipe 15t is rotated, and the compressed gas or the mud material is injected into the earth drain pipe 15t through the earth pressure feed portion 15e, thereby promoting the soil containing the gravel Gr or the earth sand Gs in the earth drain pipe 15t. Etc. Here, the earth drain pipe 15t of the rear conveyor 15 is filled with soil sand or the like, whereby the stability of the earth pressure in the chamber 7 can be maintained while maintaining the plastic fluidity of the soil or the like at a high level. Reduce the torque or thrust of the cutting head 3. Therefore, the propulsion efficiency of the propulsion device 1A can be improved. Further, the soil excavated by the propulsion device 1A can be well discharged toward the starting vertical pit.

In the present embodiment, the spiral wing portion 15s is provided in the earthmoving pipe 15t of the rear stage conveyor 15C, and the earth pressure feeding portion 15e is provided, whereby the earth discharging ability of the earth discharging pipe 15t can be improved.

(Fifth Embodiment)

Fig. 17 is a schematic configuration view showing an example of a propulsion device according to another embodiment of the present invention as seen from the side surface side.

The propulsion device 1B of the present embodiment is a muddy water type propulsion device that pressurizes muddy water to a chamber 7 provided in the apparatus body 2 behind the cutting head 3 by a mud transfer pump, and in the chamber 7 The pressure of the muddy water is set to be the pressure against the earth pressure of the tunneling surface and the pressure of the groundwater pressure, and the cutting head 3 is abutted against the heading surface and rotated while achieving the stability of the heading surface, thereby excavating. Further, the front surface of the cutting head 3 of the propulsion device 1B is the same as that described in Fig. 2 or Fig. 12.

A mud transfer pipe (mud water injection means) 25 is provided on the upper side of the apparatus main body 2 constituting the propulsion device 1B. This sump 25 sends the muddy water to the piping in the chamber 7. The front end (dumping port) of the sump 25 passes through the upper portion of the front surface of the partition wall 6 and reaches the chamber 7. That is, the muddy water sent from the sump 25 is supplied into the chamber 7 from the upper side in the front surface of the propulsion device 1B. On the other hand, the rear end side of the sump 25 extends from the chamber 7 through the inside of the apparatus body 2 and the excavation pit to the outside of the excavation pit, and is mechanically transmitted through a mud pump (not shown) outside the excavation pit. The ground is connected to a mud sink (not shown). Further, the mud water tank is mechanically connected to the mud water treatment device (not shown) outside the excavation pit.

On the other hand, before the formation of the propulsion device 1B The rear end portion of the earth drain pipe 10a of the machine 10 is mechanically connected to the mud discharge pipe 26 having a smaller diameter than the earth drain pipe 10a through the opening and closing portion 27. The mud discharge pipe 26 is for discharging the muddy water (the muddy water containing the excavated earth sand in the chamber 7) conveyed from the front conveyor 10 to the pipe outside the excavation pit. The rear end side of the drain pipe 26 extends to the outside of the excavation pit through a mud pump (not shown) that passes through the excavation pit, and is mechanically connected to the mud water treatment device outside the excavation pit. That is, the muddy water containing the excavated earth sand in the chamber 7 is transported from the front conveyor 10 through the mud discharge pipe 26 to the outside of the excavation pit, and is separated into the earth sand and the muddy water by the mud water treatment device outside the excavation pit. After being adjusted in specific gravity or viscosity, it is sent to the mud tank, and is again sent to the chamber 7 (the heading surface) through the mud pipe 25. Other than that, it is the same as that described in the first embodiment or the second embodiment.

In the propulsion device 1B of the present embodiment, the size of the opening 3g (see FIGS. 2 and 12) of the cutting head 3 is also set to the maximum transportable gravel diameter of the front conveyor 10, whereby, for example, even It is a larger gravel having a diameter of 100 to 150 mm and can be taken into the chamber 7 without being crushed by the cutting head 3. Therefore, the crushing process of the pebble or the like can be reduced, so that the advancing speed of the propulsion device 1B can be increased. Further, since the wear or breakage of the cutting head 3 (bit) can be reduced, the steps of repairing the cutting head 3 (bit) can be reduced. Thereby, the propulsion efficiency of the propulsion device 1B can be improved.

As described above, the inventions of the present invention have been specifically described based on the embodiments, but all the aspects of the embodiments disclosed in the present specification are illustrative and not limited to the disclosed techniques. That is, the technical scope of the present invention should not be based on the description in the foregoing embodiment. It is to be understood that all of the modifications are included in the scope of the claims and the scope of the claims and the scope of the claims.

[Industrial availability]

In summary, the propulsion device of the present invention is effective in the application of the burial work of the small-diameter pipe.

1A‧‧‧ propulsion unit

3‧‧‧ cutting head

3a‧‧‧ Panel Department

3b‧‧‧Roller Cutter

3bb‧‧‧ drill bit

3c‧‧‧ cutting teeth

3d‧‧‧Additive Material Injection Department

3e‧‧‧Outer Rings

3f‧‧‧Drill

3g‧‧‧ openings

Cx, Cy‧‧‧ center line

R1‧‧‧ diameter

Claims (7)

A propulsion device for pushing a device body from a rear side thereof through a propulsion pipe toward a ground, thereby advancing the device body to embed the propulsion pipe in a ground, the propulsion device comprising: a cutting disk for rotatable a state of being mounted on the front surface of the apparatus body for excavating the excavation surface; the receiving portion being disposed behind the cutting disc in the apparatus body for accommodating the excavated earth sand taken in through the opening of the cutting disc; The first discharge means is disposed behind the storage portion in the apparatus body to transport the excavated soil sand in the storage portion to the rear side, and a rotation driving means in the apparatus body in the outer periphery of the first discharge means Two or more sets are provided for rotating the cutting disk; and the first discharging means includes: a first discharge pipe for forming a conveying path of the excavated soil sand in the housing portion; and a shaftless spiral portion that is rotatable The first discharge pipe is disposed in the first discharge pipe for conveying the excavated earth sand in the first discharge pipe; and the first discharge means is configured to be the first The direction of the central diameter tube of the positioning state of the central portion of the apparatus body diameter direction is set; the size of the cutting disc of the opening portion, the system is set to the maximum of the first discharge means can conveying gravel diameter. The propulsion device according to claim 1, wherein a connection portion connecting the rotary driving means and the cutting disk is provided with a scraping portion for scraping the excavated soil sand in the accommodating portion. The propulsion device according to the first or second aspect of the invention, wherein the second discharge means is provided in a rear stage of the first discharge means, and the second discharge means includes a second discharge pipe to be rotatable The state is connected to the first discharge pipe; and the spiral wing portion is fixed to the inner wall of the second discharge pipe. The propulsion device according to the first or second aspect of the invention, wherein the third discharge means is provided in a rear stage of the first discharge means, and the third discharge means includes a second discharge pipe connected to the foregoing The first discharge pipe and the pressure feed means press the excavated soil sand in the second discharge pipe to the rear. The propulsion device according to the first or second aspect of the invention, wherein the fourth discharge means is provided in a rear stage of the first discharge means, and the fourth discharge means includes a second discharge pipe to be rotatable The state is connected to the first discharge pipe; the spiral wing portion is fixed to the inner wall of the second discharge pipe; and the pressure feeding means presses the excavated earth sand in the second discharge pipe to the rear. The propulsion device according to any one of claims 1 to 5, further comprising an additive material injection means for injecting at least one of a soil material and a bubble material into the foregoing At least one of the boring surface, the inside of the accommodating portion, and the first discharging means. The propulsion device according to any one of claims 1 to 5, wherein a muddy water injection means is provided in the apparatus body to be disposed behind the housing portion for use of muddy water Injected into the housing portion.