JP4233035B2 - Shield excavator moving device and moving method thereof - Google Patents

Description

  The present invention relates to a shield excavator moving apparatus and a moving method thereof.

Conventionally, when constructing a tunnel using the shield tunnel construction method, the shield excavator has been used up in one tunnel and disassembled at the arrival part. However, excavating two shield tunnels with a single shield excavator can obviously reduce the production cost of the shield excavator. Therefore, a method has been adopted in which a small-diameter shield excavator is rotated and moved in a shaft and used again for the next tunnel excavation. As this method, for example, a method of applying grease to the work floor and moving it with a jack, a method of placing a ball bearing or chill tank or roller under a receiving base of a shield excavator and moving it with a jack, a turntable at the bottom In this case, a method of turning and moving, a method of turning and moving using an air caster, a method of moving using a smooth plate having a small friction coefficient, and the like have been implemented (for example, Patent Document 1).
Japanese Patent Laid-Open No. 2003-239681

The above-described conventional shield excavator moving device and moving method have the following problems.
<1> If grease is applied to the work floor, the floor is slippery and dangerous. Also, when using grease, ball bearings, chill tanks, rollers, etc., if there are foreign objects or irregularities on the floor, it will hinder the movement.
<2> In the conventional movement method, since it is difficult to control the movement direction and the movement distance, slight movement is difficult. For this reason, a large work space provided with an extra place is required.
<3> The installation and removal work of the moving device is large and the moving work is difficult because the jacks are often replaced.

In order to solve the above-described problems, a moving device for a shield excavator according to the present invention is a moving device used for moving a shield excavator, and a gantry fixed below the shield excavator, and the shield A jack-up device that is fixed to an excavator and moves the shield excavator up and down by a telescopic action; a horizontal movement device that is installed under the mount and moves the shield excavator in a horizontal direction by a slide mechanism; Consists of.

The shield excavator moving device according to the present invention includes a sliding ship on which a gantry fixed below the shield excavator is mounted, a rail that is a traveling path of the sliding ship, and the sliding device. And a friction resistance between the sliding ship and the rail is set to be smaller than a friction resistance between the rail and the support surface of the rail.

The mobile device of the shield excavator of the present invention, a rotary turntable installed on top of the sliding ship, on the turntable, placing the frame fixed below the shield excavator It is characterized by this.

The moving method of the shield excavator of the present invention is the method of moving a shield excavator using the moving device of the shield excavator described above, wherein the horizontal moving device is set at a certain distance from the center point of the rotational movement. A first step of horizontally moving the shield excavator together with the gantry while rotating the turntable by the slide mechanism of the horizontal movement device, arranged so as to slide between two points on the circumference of the place; It consists of a second step of extending the jack-up device and moving the horizontal movement device in the movement direction on the circumference, and repeatedly performing the first step and the second step a required number of times, it is characterized in that the rotational movement of the shield excavator.

The shield excavator moving apparatus and the moving method thereof according to the present invention can obtain at least one of the following effects by means for solving the above-described problems.
<1> Since the present invention has a configuration in which the shield excavator is placed and moved on the horizontal movement device, there is no danger of slipping on the floor, and there are foreign objects and irregularities on the support surface. There are few obstacles to movement.
<2> Since the shield excavator can be arbitrarily determined in distance and direction by the horizontal movement device, the shield excavator can be reliably moved even in a small distance. For this reason, it is possible to move safely and accurately even in a narrow work space.
<3> Since the frictional resistance of the slide mechanism of the horizontal movement device is smaller than the frictional resistance with the support surface, the horizontal movement device does not move with the slide. Therefore, it is not necessary to fix the horizontal movement device to the support surface with an anchor or the like, and installation and removal can be easily performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> Overall Configuration As shown in FIG. 1, the shield excavator moving device 10 according to the present invention has a shield excavator 20 mounted thereon and moves in at least one of the horizontal direction and the vertical direction. It is.
The shield excavator moving device 10 includes a gantry 40 that is fixed under the shield excavator 20, a jack-up device 50 that is installed on the shield excavator 20 and moves the gantry 40 and the shield excavator 20 up and down by an expansion and contraction action, It is configured with a horizontal movement device 60 that is arranged under the gantry 40 and moves the shield excavator 20 in the horizontal direction by a slide mechanism.
Hereinafter, each part which comprises this invention is explained in full detail.

<2> Base The base 40 is a base on which the shield excavator 20 placed horizontally is placed, and is fixed below the shield excavator 20. The gantry 40 includes, for example, a pedestal 41 made of a plurality of members arranged at regular intervals in a direction substantially perpendicular to the axis of the shield excavator 20, and two support portions 42 laid across the upper portion of the pedestal 41. (FIG. 1). The shield excavator 20 is disposed and fixed between the two support portions 42.
The gantry 40 has a structure that can withstand the inertial force associated with rolling and moving the shield excavator 20 up and down, left and right, and for example, one made of H-shaped steel can be used.

<3> Jack-up device The jack-up device 50 is a device that moves up and down in the vertical direction to move the gantry 40 and the shield excavator 20 up and down (FIG. 1). The jack-up device 50 includes a support portion 51 that is fixed to the shield excavator 20 and an extendable jack 52. The jack-up device 50 is fixed to the front, rear, left, and right of the bottom surface of the shield excavator 20 that is placed horizontally. The shield excavator 20 is moved up and down in parallel. The tip of the jack 52 is brought into contact with the support surface 30 due to the extension of the jack 52 and the shield excavator 20 is pushed up.
The arrangement of the jack-up device 50 is arbitrary. For example, as shown in FIG.

  The support portion 51 of the jackup device 50 may be configured to be able to be added. Thereby, even when the position of the shield excavator 20 moves upward, the jack 52 can be kept at the same position, so that the shield excavator 20 can always be moved up and down.

<4> Horizontal Moving Device The horizontal moving device 60 is a device that horizontally moves the shield excavator 20 mounted on the top via the gantry 40. If the horizontal movement device 60 moves on the same plane (horizontal direction), the shield excavator 20 can be slid horizontally or rotated.
As shown in FIG. 2, the horizontal moving device 60 includes, for example, a sliding ship 61 on which the gantry 40 is placed, a rail 62 that is a sliding surface of the sliding ship 61, and a jack 63 that is a moving means of the sliding ship 61. The sliding ship 61 is slid with the jack 63.

  The frictional resistance between the sliding ship 61 and the rail 62 is set to be smaller than the frictional resistance between the rail 62 and the support surface 30 on which the rail 62 is placed. For example, an ethylene tetrafluoride plate is attached to the lower surface of the sliding ship 61, and a stainless steel plate is disposed on the upper surface of the rail 62. As a result, the coefficient of friction can be about 0.05, and it can be moved with a small frictional resistance, that is, with a small force.

  For example, a center hole jack can be used as the jack 63, and one end of the center hole jack is fixed to the rail 62. For example, a channel steel material can be used for the rail 62, and an open portion having a U-shaped cross section is disposed upward, and the sliding ship 61 is caused to travel inside thereof.

The jack 63 can be used in any form of a shortening mechanism or an extension mechanism.
In the case of the shortening mechanism, the sliding ship 61 is pulled toward the jack 63 by the shortening action of the jack 63. Therefore, the distance between the sliding ship 61 and the jack 63 is connected by, for example, a PC steel wire 64.
On the other hand, in the case of the extension mechanism, since the sliding ship 61 moves away from the jack 63, it is not necessary to provide a connecting member between them.

  A rotary turntable 65 can be installed on the upper part of the sliding ship 61. In such a form, the gantry 40 can be placed on the turntable 65, and the gantry 40 can be moved while being rotated. The turntable 65 may be configured to be rotatable, for example, by covering a cylindrical support member with a bottomed cylindrical member having one end whose inner diameter is larger than the outer diameter of the support member.

<5> Installation of Moving Device Next, a method of moving the shield excavator 20 using the moving device 10 of the shield excavator will be described with reference to the drawings.

  The moving device 10 of the present invention is installed in a vertical shaft that the shield excavator 20 reaches after finishing excavation. The moving device 10 is arranged in the vicinity of the tunnel A from which the shield excavator 20 protrudes first (FIG. 3). First, a flat and smooth steel plate is laid on the floor slab in the shaft to form the support surface 30. The support surface 30 is laid from the exit of the tunnel A from which the shield excavator 20 protrudes to the entrance of the tunnel B where new excavation starts. Then, the gantry 40 is installed on the support surface 30 near the exit of the tunnel a.

<6> Installation of shield excavator The shield excavator 20 that has come out of the tunnel A is advanced as it is, loaded on the mount 40, and both are fixed. In order to prevent the mount 40 from moving during loading of the shield excavator 20, the mount 40 is fixed using a wall of a shaft. After loading the shield excavator 20, the screw conveyor and the in-machine deck behind the tail portion of the shield excavator 20 are removed, and the jackup device 50 is installed on the outer surface of the shield excavator 20. In this example, two right and left jack-up devices 50 and 50 are installed in the vicinity of the middle trunk portion of the shield excavator 20, and one right and left jack-up devices 50 are fixed near the front trunk portion.

  Next, the horizontal movement device 60 is disposed below the gantry 40. The jack-up device 50 is extended to raise the gantry 40 and the shield excavator 20. Eventually, when a gap is generated between the gantry 40 and the support surface 30, the horizontal movement device 60 is inserted between them, and a predetermined number (four in this example) is arranged. In this example, a tension type horizontal movement device 60 is used. For this reason, the horizontal movement device 60 is set in a stretched state in advance, that is, in a state where the sliding ship 61 and the jack 63 are separated from each other, and arranged in the moving direction (tunnel A → tunnel B direction). After the placement, the jack-up device 50 is jacked down and the mount 40 is placed on the turntable 65.

<7> Horizontal movement of shield excavator After releasing the fixing of the gantry 40, the shield excavator 20 is slid in the horizontal direction. The jack 63 of the horizontal movement device 60 is shortened at the same time, and the sliding ship 61 is moved along the rail 62. When the jack 63 is shortened, the shield excavator 20 moves together with the gantry 40 in the lateral direction (tunnel A → tunnel B), and the jack 63 moves by the shortened amount. For the movement, it is preferable to use a digital load / displacement meter and operate the jack 63 while simultaneously comparing and measuring the load, stroke and moving amount of the jack 63.

  When the shield excavator 20 does not reach the next scheduled movement position C by one movement of the horizontal movement device 60, each horizontal movement device 60 is moved. First, the jack-up device 50 is extended, and the gantry 40 and the shield excavator 20 are raised. When the gantry 40 is lifted from the turntable 65, each horizontal movement device 60 is moved to the B side. The horizontal movement device 60 in the contracted state is returned to the extended state and arranged. After that, jack down and place the gantry 40 on the turntable 65 and slide in the same manner as described above. The above operation is repeated and the shield excavator 20 is moved laterally to a predetermined location C.

<8> Rotating movement of shield excavator In order to newly construct a parallel tunnel B using the shield excavator 20 coming out of the tunnel A, it is necessary to rotate the direction of the shield excavator 20 by 180 degrees. Therefore, the gantry 40 is then rotated to change the orientation of the shield excavator 20 (FIG. 4).

  In order to rotate, it is necessary to change the arrangement of the horizontal movement device 60. All the horizontal movement devices 60 are placed on a circumference at a certain distance from the center point 70 of rotation, and a start point 71 before the movement and an end point within a range in which the sliding ship 61 can move (slide) from the start point 71. 72 is set so that the center of the rail 62 passes over the string connecting the two points. When the jack 63 is shortened, the turntable 65 moves on the rail 62 while rotating, and the shield excavator 20 rotates around the center point 70 according to the sliding amount. After the movement, when the amount of rotation of the shield excavator 20 is insufficient, the position of the horizontal movement device 60 is moved in the same manner as the lateral slide, and the rotation movement is performed. This is repeated a required number of times, and the shield excavator 20 is rotated 180 °.

<9> Moving the shield excavator upward After rotating, the shield excavator 20 is laterally moved to the planned position of the starting tunnel B (FIG. 3). The horizontal movement is performed by the above-described horizontal slide method.

  Next, the shield excavator 20 is moved upward. First, the jack-up device 50 is extended to move the shield excavator 20 upward. When the shield excavator 20 is lifted and the gantry 40 is lifted from the turntable 65, the horizontal movement device 60 is removed. Further, the shield excavator 20 is raised so that the raising member 80 can be inserted between the gantry 40 and the support surface 30, and the raising member 80 is inserted and disposed in the gap. Here, the raising member 80 is a member that is disposed below the gantry 40 and moves the gantry 40 upward. For the raising member 80, for example, H-section steel having a cross section smaller than the stroke length of the jack-up device 50 can be used.

  The raising material 80 is arranged in parallel under the gantry 40, jacked down, and the gantry 40 is placed on the raising material 80. Accordingly, the gantry 40, that is, the shield excavator 20 is moved upward by the amount of the raising material 80. The contact portion between the raising material 80 and the gantry 40 is fixed by welding or bolts.

When the shield excavator 20 moves up, the jack-up device 50 also moves upward according to the amount of movement. If it is necessary to move the shield excavator 20 further upward and there is no stroke length left to insert a new raising member 80 into the jack 52, the jack-up device 50 is extended. This is performed by a method of adding the support portions 51. As the member to be added, for example, a member having the same cross-sectional shape as that of the support portion 51 and having the same height (length) as the cross-section of the raising member 80 is used. You can go.
When the raising material 80 is further piled up, the newly arranged raising material 80 is rotated by 90 ° with respect to the previously arranged raising material 80, that is, arranged in a cross-beam shape, while maintaining stability. Move upward.
The above method is repeated as many times as necessary.

<10> Completion of Movement When the shield excavator 20 moves to the vicinity of the entrance of the tunnel B, the gantry 40 is fixed to the wall of the shaft again, and the shield excavator 20 is started from above the gantry 40. During the excavation, the jack-up device 50 and the mount 40 are removed from the shield excavator 20.

<11> Principle of horizontal movement In the present invention, the shield excavator 20 is moved using the horizontal movement device 60 instead of using grease or a roller having a small friction coefficient as in the prior art. It is. In this moving principle, the frictional resistance, that is, the friction coefficient between the rail 62 and the sliding ship 61 is set smaller than the frictional resistance between the bottom surface of the rail 62 and the support surface 30 constituting the horizontal moving device 60. The sliding ship 61 can be moved without moving the rail 62 by the reaction force during the movement. Therefore, it is not particularly necessary to fix the horizontal movement device 60 to the support surface 30, and the effect that it can be easily installed, moved and removed, and even if the entire support surface 30 is not always in a clean state, If only the contact surface between the horizontal movement device 60 and the support surface 30 is in contact with no dirt, it can move without any problem.

Explanatory drawing of the Example of the moving apparatus of the shield excavator of this invention. The perspective explanatory view which abbreviate | omitted a part of horizontal movement apparatus. The figure which showed the movement path | route of a shield excavator. Explanatory drawing of the rotation process of a shield excavator. Explanatory drawing of the upward movement of a shield excavator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Shield excavator moving device 20 ... Shield excavator 30 ... Support surface 40 ... Base 50 ... Jack up device 60 ... Horizontal moving device 61 ... Sliding ship 62 ..Rail 63 ... Jack 65 ... Turntable

Claims (4)

A moving device used for moving a shield excavator,
A gantry fixed below the shield excavator;
A jack-up device that is fixed to the shield excavator and moves the shield excavator up and down by an expansion and contraction action;
A horizontal movement device installed under the gantry and moving the shield excavator in a horizontal direction by a slide mechanism ;
Moving device for shield excavator. In the moving apparatus of the shield excavator according to claim 1,
The horizontal movement device comprises a sliding ship on which a gantry fixed below the shield excavator is placed, a rail that is a traveling path of the sliding ship, and a jack that is a moving means of the sliding ship,
The frictional resistance between the sliding ship and the rail is set smaller than the frictional resistance between the rail and the support surface of the rail,
Moving device for shield excavator. In the moving apparatus of the shield excavator according to claim 2,
Install a rotary turntable on top of the sliding ship,
On the turntable, characterized by placing a frame fixed below the shield excavator,
Moving device for shield excavator. In the method of rotating the shield excavator using the shield excavator moving device according to claim 3,
The horizontal movement device is arranged so as to slide between two points on the circumference at a certain distance from the center point of the rotational movement,
A first step of horizontally moving the shield excavator together with the gantry while rotating the turntable by a slide mechanism of the horizontal movement device;
A second step of extending the jack-up device and moving the horizontal movement device in the movement direction on the circumference;
Repeating the first step and the second step a required number of times, and rotating the shield excavator ,
How to move the shield excavator.

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