JP2002295175A - Propeller and shield tunneling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a propeller which dispenses with setting of an initial portion pressing jack, and can carry out propulsion depending on propelling force of its own, and to provide a shield tunneling method using the propeller. SOLUTION: The propeller is comprised of a propeller main body 2, an expansion pipe 11, a plurality of stroke jacks 9, a frontward protruding member 10, and a rearward protruding pipe 12. The propeller body 2 has a cutter head 4 arranged at a front end thereof. The expansion pipe 11 follows the propeller body 2, and has its front end inserted into the propeller body 2 or allows a rear end of the propeller body 2 to be inserted into the front end thereof. Further, the expansion pipe 11 has its rear end fixed to a front end of a shield pipe 13. Each stroke jack 9 has its one end connected to the propeller body 2 and its other end connected to the expansion pipe 11. The frontward protruding member 10 is arranged on the propeller body 2 in a manner being outward protrudable from the same. The rearward protruding member 12 is arranged on the expansion pipe 11 in a manner being outward protrudable from the same. The entire length from the front end of the propeller body 2 to the rear end of the expansion pipe 11 is expandable by outward protruding either the frontward protruding member 10 or the rearward protruding member 12. Further, by expansion of the stroke jack 9, the propeller body 2 is frontward propelled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion device and a shield method used for forming a shaft or the like in soil.

[0002]

2. Description of the Related Art Conventionally, semi-shield machines such as earth pressure semi-shield machines, mud pressurization semi-shield machines, and mud thick semi-shield machines, and / or these machines (hereinafter referred to as propulsion machines). The semi-shield construction method used is widely used when constructing horizontal shafts such as tunnels or sewage pipes underground because of the wide applicable soil quality and excellent operability. .

As shown in FIG. 10, the propulsion device 100 has a cutter head 101 that is rotatably driven at the tip thereof, and a motor 102 that drives the cutter head 101 and a digging device that is driven by the cutter head 101. A transport means (not shown) for transporting sediment and mud taken into the apparatus is formed. And such a propulsion device 10
0 is propelled laterally from inside the start shaft 103 formed below the ground, and the driving source in the lateral direction is:
Main push jack 104 installed in the start shaft 103
Depending on the driving force. That is, in the shield method using the conventional propulsion device 100, the cutter head 101 disposed on the propulsion device 100 is driven to rotate, and at the same time, the main pushing jack 104 is driven and pressed in the propulsion direction. After being propelled for a predetermined length from the start shaft 103, the propulsion device 10
Then, the shield tube 105 is inserted into the rear portion of the tube 0, and the rear portion of the shield tube 105 is pressed by the main pushing jack 104 to further propel the tube. By repeating these steps, a horizontal shaft or the like continuously formed by the shield tube 105 is constructed behind the propulsion device 100.

[0004]

In the shield method using the conventional propulsion device 100 described above, the propulsion device 100 at the tip is pressed while the tail shield tube 105 is pressed by the main push jack 104. Due to the construction method, it is required that a main push jack 104 be provided in the start shaft 103 without fail.

However, the main push jack 104
In addition to lowering the main push jack 104 into the start shaft 103 using a crane or the like (not shown) from the ground, a structure 106 for previously installing the main push jack 104 is constructed horizontally. Must.
Therefore, development of a new propulsion device that can be propelled by the propulsion force of the propulsion device 100 without installing the main push jack 104 and development of a new shield method have been awaited.

Accordingly, the present invention has been proposed to solve the problems of the conventional propulsion device and shield method described above, and does not require the installation of a main push jack.
It is an object of the present invention to provide a propulsion device and a shield method that can be propelled by a propulsion force unique to the propulsion device.

[0007]

Means for Solving the Problems The present invention has been proposed to solve the above problems, and the first invention (the invention described in claim 1) relates to a propulsion device. A thruster body having a cutter head formed at the tip thereof, and a tip end side inserted into the thruster body following the thruster body or a rear end side of the thruster body inserted into the tip end side. The rear end is a telescopic tube fixed to the front end of the shield tube, one end is connected to the thruster main body, and the other end is connected to the telescopic tube, and a plurality of stroke jacks are connected to the thruster main body. A protruding member provided on the telescopic tube, and a rear protruding member disposed on the telescopic tube and protruding outward from the telescopic tube. From the end of the machine body to the rear end of the telescopic tube Total length, by protruding one of the front-side projecting member or the rear-side projecting member outwardly,
It is characterized in that it is made extendable and contractable, and the propulsion unit is propelled forward by extension of the stroke jack.

In the first aspect of the present invention, in the relationship between the main body of the propulsion device and the telescopic tube following the main body of the propulsion device, the distal end side (front side) of the telescopic tube is inserted into the main body of the propulsion device. Or the rear end side of the main body of the propulsion device may be inserted into the front end side (front side) of the telescopic tube.

The second invention (the invention described in claim 2)
In the first aspect of the present invention, the telescopic tube has a reduced-diameter tube portion inserted into the propulsion device main body formed at a distal end side, and an outer diameter is provided behind the reduced-diameter tube portion. An enlarged-diameter tube portion having an outer diameter equal to the outer diameter of the propulsion unit body is formed, while the base end of the stroke jack is fixed to the propulsion unit body and the distal end of the stroke jack expands and contracts. It is characterized in that it is configured to be in contact.

The third invention (the invention according to claim 3)
The present invention relates to a shield method, and uses the propulsion device according to the first or second aspect of the present invention to drive a cutter head while extending a rear-side projecting member outward and extend a stroke jack. A step of propelling the thruster body forward, and a step of projecting the front-side protruding portion outward to reduce the stroke jack and move the telescopic tube to which the shield tube is fixed at the rear end forward. It is characterized by becoming.

According to the above-described propulsion device or shield method according to the present invention, the stroke jack is extended and the cutter head is driven with the rear-side protruding member protruding outward, so that the cutter head is conventionally used. The propulsion can be propelled forward by the original thrust of the propulsion device without the propulsion of the main push jack. Further, after the entire length from the front end of the propulsion unit main body to the rear end of the telescopic tube is extended, the protruding member that has been protruding outward is immersed inward, and the front-side protruding part that has been immersed until then is immersed. With the member protruding outward, the stroke jack is reduced. By such an operation, the total length from the front end of the propulsion device main body to the rear end of the telescopic tube is reduced. At this time, since the shield tube is fixed to the rear end of the telescopic tube, the shield tube is simultaneously drawn forward.

The shield tube provided at the forefront is fixed to the telescopic tube, and the rear end of the shield tube and the front end of the next shield tube are fixed in the same manner. A new shield tube is fixed to the end of the shield tube group in the starting shaft each time the ship is propelled by. By using such a propulsion device and a shield method, it is not necessary to arrange a main push jack in the start vertical shaft, and it is possible to construct a horizontal shaft consisting of shield tube groups by the expansion and contraction driving force of the stroke jack Becomes

In particular, the second invention (the invention according to claim 2)
According to the above, it is possible to realize a more efficient shielding method without receiving a large resistance when the telescopic tube having the shield tube (or the shield tube group) fixed to the tail moves forward. Become.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the structure of a propulsion device according to an embodiment of the present invention will be described in detail with reference to the drawings, and then a shield method using the propulsion device will be described in detail in the order of steps.

A propulsion device 1 according to this embodiment comprises a propulsion device main body 2 and a telescopic tube following the propulsion device main body 2, as shown in FIG.
The propulsion device main body 2 is formed in a substantially cylindrical shape, and a cutter head 4 is provided at a tip end. The cutter head 4 has a large number of cutter bits 4 for digging in the soil.
a is fixed. As shown in FIG. 2, a drive motor 5 for rotating and driving the cutter head 4 is built in the propulsion device main body 2. Further, in this embodiment, the drive motor 5 is provided around the drive motor 5. Propulsion unit 2
Direction correcting jacks 6 for controlling the propulsion direction of the vehicle
Is built-in. Therefore, in the propulsion device 1, the propulsion direction can be changed by the direction correcting jacks 6. The cutter head 4 has an opening 4b for taking mud excavated by the cutter bit 4a into the propulsion unit body 2.
The mud taken into the propulsion unit main body 2 through the b is passed through the propulsion unit main body 2, a telescopic tube described later, and a shield tube via a mud drain pipe 7 and also serves as a starting point of a horizontal shaft. It is discharged to the ground through a pit.

A trailing pipe 8 is formed at the rear of the propulsion unit main body 2. The trailing tube portion 8 is a tubular portion having the same outer diameter as the outer diameter of the propulsion device main body 2. The trailing tube portion 8 includes, as shown in FIG. In the present embodiment, four jacks 9 are provided. Each of these stroke jacks 9 is the same jack, and the extension speed can be appropriately adjusted according to the excavated soil and the rotation speed of the cutter head 4. Further, in the subsequent pipe portion 8 and in front of the stroke jacks 9, 9,
A front gripper jack 10 is provided. The telescopic tube 11 is disposed behind the succeeding tube portion 8. The outer diameter of the distal end side of the telescopic tube 11 is a reduced diameter portion 11a that is reduced in diameter by the thickness of the succeeding tube portion 8 from the outer diameter of the subsequent tube portion 8, and the rear portion of the reduced diameter portion 11a is The reduced diameter portion 1
The outer diameter of the propulsion unit main body 2 is the same as the outer diameter of the propulsion unit main body 2 and the outer diameter is larger than that of the propulsion unit 2. The reduced diameter portion 11a is inserted into the succeeding tube portion 8, and the distal ends of the telescopic rods 9a, 9a constituting the four stroke jacks 9, 9 are respectively provided behind the following tube portion 8. Fixed piece 8a formed on the end side
It is connected to.

A rear gripper jack 12 is disposed behind the telescopic tube 11. The rear gripper jack 12 is the same member as the front gripper jack 10 provided in the trailing pipe portion 8, and the front gripper jack 10 is a front protruding member constituting the present invention. The rear side gripper jack 12 is a rear side protruding member constituting the present invention. The front gripper jack 10 and the rear gripper jack 1
2, the left cylinder portion 10a as shown in FIG.
(12a), the right cylinder portion 10b (12b), and the left and right cylinder portions 10a (12a), 10b (12
b) The protruding part 10c (1
2c) and 10d (12d). Openings (not shown) corresponding to the diameters of the protruding portions 10c (12c) and 10d (12d) are formed on the left and right sides of the succeeding tube portion 8 and the telescopic tube 11, respectively. 10c (12c) and 10d (12d) are made to be able to come and go outside (in the soil).

[0018] Behind the telescopic tube 11, a shield tube 13 following the telescopic tube 11 by a method described later.
Has been fixed. This shield tube 13 is a steel tube in the present embodiment, and is welded to the rear end of the telescopic tube 11. In the present invention, the shield tube 13
Is a steel pipe, it is welded to the rear end of the telescopic pipe 11. For example, when a vinyl chloride pipe is used, one screw (not shown) is formed at the rear end of the telescopic pipe 11, and At the front end, the other screw to be screwed to one screw is formed, and at the rear end, one screw to be screwed to the front end of the next PVC pipe is formed. In addition, the method of continuing such a shield pipe 13 in a start shaft is mentioned later.

Hereinafter, the shield method using the propulsion device 1 will be described in detail. First, the starting shaft 15 is constructed below the ground, and then a horizontal shaft is formed horizontally from below the starting shaft 15. The horizontal shaft has at least a length substantially equal to the length of the propulsion device 1. When such a horizontal shaft is formed, a crane (not shown) is used to drive the propulsion unit 2, the subsequent pipe 8, and the telescopic pipe 1.
In the order of 1, the vehicle is carried into the starting shaft 15, the trailing end of the propulsion unit 2 is connected to the trailing tube 8, and the trailing end of the trailing tube 8 is connected to the telescopic tube 11. Machine 1. When the components of the propulsion device 1 are connected to each other, the shield pipe 13 which is a steel pipe is then connected to the start shaft 1.
5 and welded to the rear end of the telescopic tube 11 to obtain the state shown in FIG. The state shown in FIG. 6 is the state of the telescopic tube 11 inserted into the succeeding tube portion 8 from the leading end of the trailing tube portion 8 (or from the leading end of the propulsion device main body 2) and connected by the stroke jacks 9, 9. The total length up to the rear end is reduced. Therefore, the stroke jacks 9, 9 are also in a reduced state.

In this state, first, the rear gripper jacks 12, 12 are driven so that the respective protruding portions 12c, 12d protrude outward.
Pierce 2d into the ground. When the driving of the rear gripper jacks 12 is completed, the drive motor 5 is driven to rotate the cutter head 4 and extend the stroke jacks 9. Due to the extension of the stroke jacks 9, 9,
The telescopic tube 11 is provided with the rear gripper jacks 12, 12.
Are fixed by the protruding portions 12c, 12d, the extension force of the stroke jacks 9, 9 acts forward. At this time, since the extension speed of the stroke jack corresponds to the rotation speed of the cutter head 4, the stroke jacks 9, 9 are gradually extended according to the rotation speed of the cutter head 4. To go. Due to the extension of the stroke jacks 9, 9, the respective stroke jacks 9 are inserted into the subsequent pipe 8 from the tip of the subsequent reduced pipe 8 (or from the tip of the propulsion device main body 2). , 9 until the rear end of the telescopic tube 11 is gradually extended, and finally reaches the state shown in FIG. In the course of the extension operation, the earth and sand excavated by the cutter head 4 flows into the cutter head 4, passes through the starting shaft 15 through the drain pipe 7, and is discharged to the ground.

Then, after the telescopic tube 11 inserted into the succeeding tube portion 8 from the leading end of the succeeding tube portion 8 (or from the leading end of the propulsion device main body 2) and connected by the stroke jacks 9, 9, as described above. When the full length to the end is extended, then the rear gripper jack 1 that has been projected so far
As shown in FIG. 8, each of the protrusions 12c and 12d is immersed in the telescopic tube 11 again. Then, together with such an operation, the protrusions 10 c, 10, which constitute the front side gripper jacks 10, which have been immersed in the subsequent pipe portion 8 until then,
10d is protruded outward and stabs into the ground. These
When the driving of the front gripper jacks 10, 10 is completed, the stroke jacks 9, 9 which have been extended up to that point are then driven to contract. As a result, since the subsequent pipe portion 8 and the propulsion unit main body 2 connected thereto are fixed by the front gripper jacks 10, 10, the telescopic tube 11 and the shield pipe 1 fixed thereto are fixed.
3 is gradually drawn forward (toward the subsequent pipe section 8),
Finally, the state shown in FIG. 9 is obtained.

The propulsion device 1 including the shield tube 13
9 is in the state shown in FIG. 9, and then the protrusion 1 of the front gripper jacks 10
0c and 10d are immersed in the succeeding tube portion 8 to be in the state shown in FIG.

As described above, the entire length of the propulsion device 1 is extended while driving the cutter head 4 and the stroke cylinders 9 by driving the rear gripper jacks 12 and 12 to protrude the respective protruding portions 12c and 12d. ,afterwards,
The protrusions 10c, 10d constituting the front gripper jacks 10, 10 are made to protrude, and the stroke jacks 9, 9 are made.
Is reduced, the horizontal shaft can be constructed without requiring the driving force of the main push jack disposed in the starting vertical shaft 15.

In the process where the shield tube 13 and the propulsion device 1 are gradually propelled and moved, when the last shield tube 13 is added, the rear end of the last shield tube 13 and
The tip of the shield tube 13 newly introduced into the start shaft 15 is welded. When the shield tube 13 cannot be welded like a steel tube (for example, when a vinyl chloride tube is used), a screw is formed at each of the front and rear ends of the shield tube 13 so that the most advanced shield tube can be used. The rear end of the tube 13 and the rear end of the telescopic tube 11, and the shield tube 13 and the shield tube 13 are respectively screwed or bonded using an adhesive.

As described above, according to the propulsion device 1 described in the present embodiment and the shield construction method using the propulsion device 1, the propulsion can be performed without using the main push jack which has been indispensable until then. The propulsion can be performed by the driving force of the aircraft 1 independently. For this reason, it is not necessary to construct a structure in the start shaft 15, and the trouble of loading the main push jack can be omitted, and the construction period can be shortened.

In the propulsion device 1, the drive motor 5, the stroke jacks 9, 9, the front gripper jacks 10, and the rear gripper jacks 12 are connected to an operation panel via cables (not shown). The operator may be able to remotely control the drive motor 5, the stroke jacks 9, 9, the front gripper jacks 10, the rear gripper jacks 12 and the like on the ground.

Also, in the above-described embodiment, it is not required that the outer diameter of the propulsion device 1 be large or small as long as it has the basic components of the present invention. In addition, the number of the front protruding members, which are the components of the present invention described as the front gripper jack 10, and the number of the rear protruding members, which are the components of the present invention described as the rear gripper jack 12, are respectively two. It is not limited to one. Also, the positions of the front-side protruding member and the rear-side protruding member need not always be provided on the left and right, and may be discharged vertically, or may be radially protruded. May be provided in the direction around the axis such that the projections protrude.

[0028]

As is clear from the above description of one embodiment of the present invention, in the present invention (the invention of claim 1 and the invention of claim 3), the rear projecting member projects outward. In this state, the stroke jack is extended and the cutter head is driven, so that the propulsion device can be propelled forward by the propulsion force unique to the propulsion device without using the propulsion force of the conventionally used main push jack.

Further, after the entire length from the front end of the propulsion unit main body to the rear end of the telescopic tube has been extended, the protruding member that has been protruding outward is immersed inside, and has been immersed until then. The stroke jack is reduced with the front-side protruding member protruding outward. By such an operation, the total length from the front end of the propulsion device main body to the rear end of the telescopic tube is reduced. At this time, since the shield tube is fixed to the rear end of the telescopic tube, the shield tube is simultaneously drawn forward.

Therefore, by using such a propulsion device and a shield method, it is not necessary to dispose a main push jack in the start vertical shaft, and the horizontal shaft composed of the shield tube group can be formed by the expansion / contraction driving force of the stroke jack. Since it is possible to construct, it is not necessary to construct a structure in the starting shaft and the trouble of loading the main push jack can be omitted, and thus, the construction period can be shortened.

In particular, the second invention (the invention according to claim 2)
According to the above, it is possible to realize a more efficient shielding method without receiving a large resistance when the telescopic tube having the shield tube (or the shield tube group) fixed to the tail moves forward. Become.

[Brief description of the drawings]

FIG. 1 is a side sectional view schematically showing a propulsion device according to an embodiment of the present invention.

FIG. 2 is an enlarged side sectional view showing a front side of the propulsion device shown in FIG.

FIG. 3 is an enlarged side sectional view showing a rear side of the propulsion device shown in FIG. 1;

FIG. 4 is a front view showing the configuration of a front gripper jack and a rear gripper jack.

FIG. 5 is a plan view showing a state in which the overall length of the propulsion device is minimized.

FIG. 6 is a plan view showing a state in which a protrusion of a rear gripper jack has protruded from the state shown in FIG. 5;

FIG. 7 is a plan view showing a state after the stroke jack has been extended from the state shown in FIG. 6;

8 is a plan view showing a state in which a protruding portion of the front gripper jack has protruded from the state shown in FIG. 7;

FIG. 9 is a plan view showing a state after the stroke jack has been reduced from the state shown in FIG. 8;

FIG. 10 is a side sectional view showing a conventional propulsion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Propulsion device 2 Propulsion device main body 4 Cutter head 5 Drive motor 9 Stroke jack 10 Front gripper jack 10c, 10d Projection portion 11 Telescopic tube 12 Rear gripper jack 12c, 12d Projection portion 13 Shield tube

Continued on the front page F term (reference) 2D054 AC18 AD17 AD35 BA06

Claims (3)

[Claims] 1. A propulsion unit main body having a cutter head formed at a front end thereof, a front end side being inserted into the propulsion unit main body following the propulsion unit main body, or a rear end side of the propulsion unit main body being formed at a front end. A telescopic tube inserted into the side and having a rear end fixed to the front end of the shield tube; a plurality of stroke jacks having one end connected to the propulsion unit main body and the other end connected to the telescopic tube; A front-side protruding member disposed on the propulsion device main body and capable of protruding and retracting outward from the propulsion device main body; and a rear-side protruding member disposed on the telescopic tube and capable of protruding and protruding outward from the telescopic tube. The total length from the front end of the propulsion unit body to the rear end of the telescopic tube is
By projecting either the front-side protruding member or the rear-side protruding member outward, it is made expandable and contractible, and the propulsion unit is propelled forward by extension of the stroke jack. A propulsion machine. 2. A reduced diameter tube portion inserted into the main body of the propulsion device is formed on the distal end side of the telescopic tube. An enlarged-diameter tube portion having an outer diameter equal to the outer diameter is formed, while a base end of the stroke jack is fixed to a propulsion unit main body and a distal end of the stroke jack expands and contracts with the telescopic tube. The propulsion device according to claim 1, wherein the propulsion device is configured as described above. 3. The propulsion device according to claim 1 or 2, wherein the cutter head is driven while the rear-side protruding member is protruded outward, and the stroke jack is extended while the propulsion device body is extended forward. Propelling; and a step of projecting the front-side protruding portion outward to reduce the stroke jack and move a telescopic tube having a shield tube fixed to a rear end thereof forward. Shield construction method.