JP3995367B2 - Method and apparatus for correcting rolling of shield excavator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield excavator rolling correction method and apparatus for correcting the rolling of a shield excavator that occurs during excavation during excavation.
[0002]
[Prior art]
Tunnel excavation with a shield excavator rotates the cutter head while pressing it against the face, while extending several propulsion jacks arranged in the rear part of the skin plate against the front end face of the segment. However, the rotary drive mechanism of the cutter head is subjected to a force in the direction opposite to the rotation direction of the cutter head, so that the shield excavator rotates in the direction opposite to the cutter head, so-called rolling occurs, and the tunnel Will adversely affect the excavation work.
[0003]
As a method for correcting such rolling, conventionally, when the rolling occurs, the cutter head is rotated in the opposite direction to rotate the shield excavator in the opposite direction to the rolling direction to return to the original state. Or after tilting the propulsion jack in the rolling direction from the front end to the rear end, the reaction force is applied to the front end surface of the segment to propel the shield excavator and a part of the propulsion force is opposite to the rolling direction. There is known a method of correcting rolling by acting.
[0004]
[Problems to be solved by the invention]
However, according to the former rolling correction method, depending on the soil quality of the excavation ground, it may be difficult to correct the rolling and the tunnel excavation is temporarily interrupted at the time of rolling correction, so the work efficiency is reduced. There is a problem, and the latter rolling correction method requires a mechanism for tilting all the propulsion jacks simultaneously and at the same inclination angle in the rolling correction direction, and such a mechanism is installed in a narrow space in the skin plate. If installed, there were problems such as hindering smooth work.
[0005]
The present invention has been made in view of such problems, and the object of the present invention is to easily and reliably correct rolling when rolling occurs without incorporating a rolling correction device in the shield excavator. It is an object of the present invention to provide a shield excavator rolling correction method and an apparatus for carrying out this method.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a rolling excavator correction method of a shield excavator according to the present invention includes a spreader attached to a rod end of a propulsion jack of a shield excavator and a front end face of an existing segment. A liner member formed on a taper surface whose front surface is inclined backward from one end side to the other end side in the circumferential direction of the tunnel, and a rolling member rotatable in the circumferential direction of the tunnel, the liner member is already installed. After interposing on the segment side and with the liner member inclined in the direction of the rolling correction, the propulsion force of the propulsion jack is partially increased by extending the propulsion jack. The shield excavator is rotated around the axis in the rolling correction direction together with the propulsion jack through the rolling member by acting in the direction of inclination of the surface. That.
[0007]
The invention according to claim 2 is a rolling excavator for a shield excavator for carrying out the above method, and is curved in an arc shape along the front end face of the existing segment and the front face from one end in the tunnel circumferential direction. A liner member formed on an inclined surface inclined rearward toward the other end, and a rolling member disposed on the tapered surface side of the liner member and rotatable in the tunnel circumferential direction. A configuration in which a taper surface direction from one end to the other end is interposed between a propelling jack of a shield excavator and the existing segment together with a rolling member superimposed on the taper surface of the liner member to correct rolling. is doing.
[0008]
Further, in the rolling correction device according to claim 2, the invention according to claim 3 relates to a preferable structure of the rolling member, the rolling member comprising a roller, and a plurality of the rollers in the circumferential direction of the tunnel. Are supported by a curved arc-shaped frame at predetermined intervals, and these rollers are in contact with the taper surface of the liner member so that the arc-shaped frame is superimposed on the taper surface of the liner member and forward from the arc-shaped frame. The spreader of the propulsion jack is configured to be in pressure contact with the front peripheral surface of the protruding roller.
[0009]
[Action]
When rolling occurs in the shield excavator, the propulsion jack is contracted to separate the spreader from the front end surface of the existing segment, and the liner member and the rolling member are interposed in the separated portion. At this time, the liner member is overlapped with the front end surface of the existing segment with the taper surface direction inclined backward from one end to the other end in the rolling correction direction, while the propulsion jack spreader is placed on the rolling member. The liner member and the rolling member are brought into contact with each other between the front end surface of the segment and the spreader of the shield excavator. When the propulsion jack is extended in this state, a part of the propulsion force of the propulsion jack acts in the downward inclination direction of the taper surface of the liner member, and the rolling jack rotates in that direction while the propulsion jack is rotated in the rolling correction direction. The shield excavator is rotated around the axis along with the movement of the propulsion jack to correct the rolling.
[0010]
According to a third aspect of the present invention, a roller is used as the rolling member, and a plurality of the rollers are pivotally supported at predetermined intervals on an arc-shaped frame curved in the tunnel circumferential direction. The arcuate frame is overlapped with the taper surface of the liner member while being in contact with the taper surface of the liner member, and the spreader of the propulsion jack is pressed against the front peripheral surface of the roller protruding forward from the arcuate frame. For example, when the liner member and the arcuate frame are overlapped, a plurality of rollers having the same diameter are turned to be rotatable in the circumferential direction of the tunnel between the existing segment and the propulsion jack spreader. Can be easily interposed with the liner member, and several rollers can be sandwiched between the tapered surface of the liner member and the spreader of the propulsion jack. That.
[0011]
Accordingly, the roller rolls on the taper surface of the liner member by the component force of the propulsion force of the propulsion jack acting in the downward inclination direction to the rear of the taper surface of the liner member, and the entire arcuate frame moves in the rolling correction direction. The propulsion jack is moved in the rolling direction by the rolling of the roller, and the rolling correction can be reliably performed even when the inclination of the tapered surface is small.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described with reference to the drawings. The rolling correction device is a liner made of a metal plate that is curved in an arc along the front end surface of the existing segment S as shown in FIGS. It comprises a member 1 and a plurality of rolling members 2 made of iron rollers that are in contact with the front surface of the liner member 1 and roll in the circumferential direction of the tunnel. The liner member 1 is formed so that the width between the outer peripheral edge and the inner peripheral edge is the same over the entire length and slightly wider than the thickness between the inner and outer peripheral surfaces of the existing segment S, and is shown in FIGS. In this way, the entire rear surface is formed as a flat surface, and the front surface is formed into a tapered surface 1a inclined backward from one end to the other end by forming it thinly from one end to the other end in the length direction. Yes.
[0013]
On the other hand, as shown in FIGS. 3, 4 and 7, the rolling member 2 made of a roller has an arcuate frame 3 which is curved in an arc shape in the tunnel circumferential direction with the same degree of curvature as the liner member 1. It is axially supported at predetermined intervals in the length direction. The arc-shaped frame 3 is fixed between the both ends of the arc-shaped inner and outer frame portions 3a and 3b having substantially the same length as the inner and outer peripheral edges of the liner member 1 by fixed end frame portions 3c and 3c having the same length. The liner member 1 is formed in substantially the same shape on the front surface, and the inner and outer frame portions 3a and 3b are provided with bearing holes 4 and 5 at small intervals in the length direction so as to face each other in the inner and outer directions. Center shafts 2a and 2b projecting from the center of both end faces of the rolling member 2 are respectively inserted into and supported by the bearing holes 4 and 5 in a freely rotatable manner. Further, the diameter of the rolling member 2 made of a roller is formed to be larger than the thickness of the arcuate frame 3, and the front and rear peripheral portions thereof protrude from the front and rear end surfaces of the arcuate frame 3, respectively.
[0014]
As shown in FIG. 5, the shield excavator A has a front body portion 12 in which a cutter head 11 that is rotationally driven by a drive motor 10 is disposed in a front end opening portion, and the front end is folded at the rear end of the front body portion 12. A rear body portion 13 that is refractorably connected via a pin (not shown), and, as is well known, a plurality of rear body portions on the inner peripheral surface of the rear portion of the rear body portion 13 at predetermined intervals in the circumferential direction. The propulsion jack 14 is attached to the front end surface of the existing segment S, and the propulsion jack 14 is rotated while the cutter head 11 is rotated. By extending, the shield excavator A is constructed by taking a propulsion reaction force in the existing segment S.
[0015]
While the tunnel is being excavated by the shield excavator A, the rotational reaction force of the cutter head 11 excavating the face ground acts on the trunk portions 12 and 13 of the shield excavator A, so that the shield excavator A moves in the direction of rotation of the cutter head 11. Roll in the opposite direction. This rolling is corrected by the rolling correction device. This correction method will be specifically described. First, the rod of the propulsion jack 14 is contracted forward, and the liner member 1 and the plurality of rolling members 2 are placed between the spreader 15 and the front end surface of the existing segment S. The arranged arcuate frame 3 is placed in an overlapped state. At this time, the liner member 1 and the arcuate frame 3 do not have to be provided corresponding to all the propulsion jacks 14, and the desired number of propulsion jacks 14 used for propulsion are disposed between the spreader 15 and the existing segment S. What is necessary is just to interpose.
[0016]
The liner member 1 and the arcuate frame 3 are formed so that the flat rear surface of the liner member 1 faces the front end surface of the existing segment S, and the arcuate frame 3 is superimposed on the taper surface 1a of the liner member 1. The rear peripheral surface of the provided rolling member 2 is brought into contact with the inclined direction of the tapered surface 1a so as to be able to roll, and the inclined surface direction of the tapered surface 1a is inclined backward from one end to the other end. With the rear surface of the liner member 1 facing the front end surface of the existing segment S and the front peripheral surface of the plurality of rolling members 2 projecting from the front surface of the arc-shaped frame 3. These liner members 1 and the arcuate frame 3 are held between the opposing end surfaces of the spreader 15 and the existing segment S.
[0017]
When the rod of the propulsion jack 14 is extended in this state, the taper of the liner member 1 in which a part of the propulsion force F of the propulsion jack 14 is inclined backward from one end to the other end as shown in FIG. The spreader 15 that acts as a rolling correction force F1 in the downward inclination direction of the surface 1a and presses against the rolling member 2 by this action force rolls the rolling member 2 in the downward inclination direction of the tapered surface 1a in the tunnel circumferential direction. The entire shield excavator rotates in the same direction around the axis via the propulsion jack 14 equipped with the spreader 15, and the rolling is corrected. is there.
[0018]
In this way, the spreader 15 of the propulsion jack 14 is pressed against the taper surface 1a of the liner member 1 via the rolling member 2, and the component of the propulsive force is applied in the rolling correction direction to cause the rolling member 2 to move in that direction. Since rolling correction is performed while rolling the roller, the sliding frictional resistance in the rolling correction direction becomes extremely small. Therefore, even if the inclination angle of the tapered surface 1a of the liner member 1 is small, the shield excavator A is rolled. It can be reliably rotated in the correction direction. In addition, since the frictional resistance with the outer peripheral surface of the trunk portion of the shield excavator A is small in the geological ground such as the clay layer, the liner member 1 formed on the tapered surface 1a having a small inclination angle is used, while the friction such as sandy is used. In the case of a ground having a large resistance, a reliable rolling correction can be performed by using the liner member 1 formed on the tapered surface 1a having a large inclination angle.
[0019]
As described above, rolling of the shield excavator A is corrected by extending the propulsion jack 14 so that a part of the propulsive force is a component force in the rolling correction direction according to the inclination angle of the taper surface 1a of the liner member 1. Since the rolling correction is performed with the component force, the rolling correction can be performed simultaneously while the shield excavator A is being excavated by the propulsion jack 14 without stopping the excavation of the shield excavator A.
[0020]
In the above embodiment, the arcuate frame 3 in which a plurality of rolling members 2 are axially supported at predetermined intervals in the circumferential direction of the tunnel is formed separately from the liner member 1, and the arcuate frame 3 is formed into a liner. Rolling correction is performed while moving the arcuate frame 3 in the rolling correction direction along with the rolling of the rolling member 2 by overlapping the taper surface 1a of the member 1, but without using the arcuate frame 3. The rolling member 2 composed of a plurality of rollers is supported on the liner member 1 so as to be rotatable at predetermined intervals in the length direction, and the spreader 15 of the propulsion jack 14 is pressed against the rolling member 2. You may keep it. In addition to the cylindrical roller as described above, a spherical body may be used as the rolling member 2.
[0021]
【The invention's effect】
As described above, according to the present invention, the front surface extends from one end side to the other end side in the tunnel circumferential direction between the spreader attached to the rod end of the propulsion jack of the shield excavator and the front end surface of the existing segment. The liner member formed on the taper surface inclined rearward and the rolling member rotatable in the circumferential direction of the tunnel are arranged such that the liner member is on the existing segment side and the rearward inclination direction of the liner member is the rolling correction direction. After the interposition of the propulsion jack, a part of the propulsion force of the propulsion jack is caused to act on the inclined direction of the tapered surface of the liner member and shielded together with the propulsion jack via the rolling member. Since the excavator is rotated in the rolling correction direction, rolling does not occur without installing a rolling correction device in the shield excavator. Only occasionally, rolling correction can be carried out by interposing a rolling correction device consisting of a liner member and a rolling member between the spreader of the propulsion jack and the existing segment, and the shield excavator can be advanced. Without stopping, rolling correction can be performed simultaneously while digging, and work efficiency can be improved.
[0022]
Further, the shield excavator is rotated together with the propulsion jack in the rolling correction direction by causing a part of the propulsion force of the propulsion jack to act in the inclination direction of the tapered surface of the liner member and rotating the rolling member in the inclination direction. Therefore, even if the frictional resistance in the rolling correction direction is extremely low and the inclination angle of the tapered surface of the liner member is small, the rolling correction can be performed reliably and smoothly.
[0023]
According to a third aspect of the present invention, a roller is used as the rolling member, and a plurality of the rollers are axially supported on an arcuate frame curved in the circumferential direction of the tunnel at predetermined intervals. The arcuate frame is overlapped with the taper surface of the liner member while being in contact with the taper surface of the member, and the spreader of the propulsion jack is pressed against the front peripheral surface of the roller protruding forward from the arcuate frame. Therefore, the liner member and the arcuate frame that rotatably supports a plurality of rollers can be handled separately, and the propulsion jack spreader and the existing segment between the opposing end surfaces during storage and use can be handled. The intermediary work can be performed smoothly, and in addition, the roller is driven by the component force of the propulsion force of the propulsion jack acting in the downward inclination direction of the taper surface of the liner member and the propulsion jack. Rolling correction can be performed while rolling in contact with the end face of the spreader, so the frictional resistance in the rolling correction direction is extremely small, and even liner members with a small inclination of the taper surface can be rolled smoothly and reliably. Corrections can be made.
[Brief description of the drawings]
FIG. 1 is a plan view of a liner member;
FIG. 2 is a front view thereof.
FIG. 3 is a front view of an arc-shaped frame provided with rolling members,
FIG. 4 is an enlarged longitudinal sectional side view thereof,
FIG. 5 is a simplified longitudinal side view of a shield excavator,
FIG. 6 is an enlarged vertical side view of the rolling correction part,
FIG. 7 is a simplified perspective view of a rolling correction state;
FIG. 8 is a simplified cross-sectional view thereof.
[Explanation of symbols]
1 Liner material
1a Tapered surface 2 Rolling member 3 Arc-shaped frame
14 Propulsion jack
15 Spreader A Shield excavator S Existing segment

Claims (3)

A front surface is formed between the spreader attached to the rod end of the jack of the propulsion jack of the shield excavator and the front end surface of the existing segment, with a tapered surface inclined backward from one end to the other end in the circumferential direction of the tunnel. The liner member and the rolling member rotatable in the circumferential direction of the tunnel are interposed such that the liner member is on the existing segment side and the inclination direction of the liner member toward the rear is in the rolling correction direction. Rolling correction of the shield excavator together with the propulsion jack through the rolling member around the axis by causing the propulsion jack to extend so that part of the propulsion force of the propulsion jack acts in the inclined direction of the tapered surface of the liner member. A rolling excavation correction method for a shield excavator, characterized by rotating in a direction. A liner member that is curved in an arc shape along the front end surface of the existing segment and has a front surface formed on an inclined surface that is inclined rearward from one end to the other end in the circumferential direction of the tunnel, and a tapered surface of the liner member A rolling member disposed on the side of the liner member and rotatable in the circumferential direction of the tunnel, and the taper surface direction from one end to the other end of the liner member is overlapped with the taper surface of the liner member for rolling correction. A rolling excavator for a shield excavator, characterized in that the rolling excavator is arranged between a propulsion jack spreader of the shield excavator and the existing segment together with a moving member. The rolling member is a roller. A plurality of rollers are axially supported on an arc-shaped frame curved in the circumferential direction of the tunnel at predetermined intervals, and these rollers are in contact with the tapered surface of the liner member. The rolling device according to claim 2, wherein the frame is superposed on the taper surface of the liner member, and the spreader of the propulsion jack is pressed against the front peripheral surface of the roller protruding forward from the arc-shaped frame. Correction device.

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