JPH0452839B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention provides a method for assembling tunnel lining segments on the inner peripheral surface of a tunnel by a segment erector disposed at the rear of a shield body of a shield tunnel excavating machine. The present invention relates to a device for lining construction using a segment ring consisting of a plurality of existing segments.

(Prior art) As one of the devices for assembling lining segments on the inner peripheral surface of a tunnel excavated by a shield tunnel excavation machine and lining the tunnel, the lining segment is grasped and is attached to a plurality of existing tunnels. a segment erector that is assembled to the front end surface of a segment ring consisting of segments; and a distance meter that measures the distance between the front end surface and an imaginary reference plane perpendicular to the axis of the shield body; A posture such as an inclination angle and a direction of inclination of the front end surface with respect to the reference plane is determined based on the value, and based on the determination result, the lining segment gripped by the segment erector is adjusted according to the posture of the front end surface. There is a lining device that assembles the lining segment to the segment ring after correcting the posture.

However, this type of conventional lining device measures the distance between multiple locations on the front end surface of one existing segment of the segment ring and the reference surface, and based on the measured values, segments the segment relative to the reference surface. Since the attitude of the front end surface of the ring is determined, the distance between the measured points on the front end surface of the existing segment is significantly smaller than that of the front end surface of the segment ring, and therefore the slight unevenness of the front end surface of the existing segment and distance measurement errors appear as a large error in determining the attitude of the front end surface of the segment ring with respect to the reference plane, and as a result, the lining segment held by the segment erector is moved according to the attitude of the front end surface of the segment ring. Unable to correct posture.

(Object of the Invention) An object of the present invention is to provide a tunnel lining device that can correct the posture of a lining segment held by a segment erector to a correct posture according to the posture of the front end surface of a segment ring. .

(Structure of the Invention) The tunnel lining device of the present invention is arranged at the rear inside the shield main body of a shield tunnel excavator,
a segment erector that grips a tunnel lining segment and assembles the tunnel lining segment to a segment ring made up of a plurality of existing segments;
a plurality of distances arranged at intervals in the circumferential direction of the shield body and for measuring distances between a virtual reference plane orthogonal to the central axis of the shield body and the front end surface of the segment ring; and a signal processing circuit that determines the posture of the front end surface of the segment ring based on the measured value of the distance meter, and the segment erector includes a signal processing circuit that determines the posture of the gripped lining segment. The apparatus includes an attitude correction mechanism for correcting the attitude of the front end surface of the segment ring to a correct attitude according to the attitude of the front end surface of the segment ring determined in the above.

(Effects of the Invention) The present invention provides a method for measuring distances between a plurality of circumferentially spaced locations on the front end surface of a segment ring and the reference plane. Therefore, the unevenness of the front end surface of the segment ring does not appear as a large error in the determination result of the attitude of the front end surface with respect to the reference surface, and as a result, the lining segment held by the segment erector The posture can be corrected to a correct posture according to the posture of the front end surface. In addition, the posture of the front end face of the segment ring is determined based on the measured value, and the posture of the lining segment is corrected based on the determined posture, so the lining segment can be easily and accurately assembled to the segment ring. I can do it.

(Example) Hereinafter, an example of the present invention shown in the drawings will be described.

The lining device 10 shown in FIGS. 1 to 3 is disposed within a shield body 14 of a shield tunnel excavator 12. A cylindrical segment ring 18 made of a plurality of existing segments 16 assembled using the lining device 10 is provided at the rear of the shield body 14 . The shield body 14 is advanced by a plurality of propulsion jacks 20 using the segment rings 18 as reaction forces.

As shown in FIG. 16, the lining segment 22 assembled to the segment ring 18 by the lining device 10 is a steel segment having an outer peripheral surface with a radius of curvature approximately equal to the radius of curvature of the inner peripheral surface of the tunnel, It has two side end surfaces 300, 302, a front end surface 304, and a rear end surface 306. Side end surface 3
An insertion rod 308 extending rearward is provided on the side of the front end surface 304 of 00. The insertion rod 308 has a substantially L-shaped shape with a base portion 310 extending from the side end surface 300 in a direction perpendicular thereto, and an engaging portion extending rearward from a tip end portion 312 of the base portion. At the corner of the front end surface 304 and the side end surface 302, there is an insertion hole 3 for receiving an insertion rod 308 of an adjacent segment.
14 are provided. A plurality of (three in the illustrated example) engagement holes 316 are provided in the front end surface 306,
The rear end surface 306 has an engagement hole 316 for the existing segment.
inserted into. The same number of engagement pins 318 as the engagement holes 316 are provided. Side end surfaces 300, 30
2 are provided with two engagement holes 320 and 322, respectively.

As shown in FIG. 17, in the above lining segment 22, the engagement pin 318 on the rear end surface 306 is inserted into the engagement hole 316 on the front end surface of the existing segment by the lining device 10, and the insertion rod 308 is inserted into the engagement hole 316 on the front end surface of the existing segment. It is assembled into the segment ring 18 by being inserted into the insertion hole 314 of a circumferentially adjacent segment of the segment ring 18 (a segment that is in the process of being formed into a ring). The segment ring 18 assembled in this manner has a cylindrical shape with a plurality of (six in the illustrated example) existing segments 16, and has an engaging hole 316 exposed on the front end surface.

The lining device 10 includes a segment erector 24 that grips the lining segment 22 and assembles the lining segment 22 to the segment ring 18 . The segment erector 24 is connected to the shield body 1
4 includes an erector ring 26 rotatably disposed about its axis.

The erector ring 26 is rotatably supported by the shield body 14 around its axis by a plurality of guide rollers 28 provided on the inner periphery of the shield body 14, and is rotated by a rotation mechanism 30. One of the guide rollers 28 is shown in FIGS.
As shown in the figure, it is rotatably supported by a guide 34 attached to a shield ring 32 of the shield body 14.

2 spaced apart in the circumferential direction of the erector ring 26
A pair of erector arms 36 extending rearward from the erector ring 26 are fixedly provided at the location. A posture correction mechanism 40 having a segment guide 38 for guiding the lining segment 22 to a correct posture is disposed on the erector arm 36.

The attitude correction mechanism 40 has an axis extending in the direction of the axis of the shield main body 14 as a Z axis, an axis perpendicular to the Z axis, and an axis extending in the diametrical direction of the erector ring 26 as a Y axis, and the Y axis and the Z axis. When the orthogonal axes are taken as the X-axis, the erector arm 36 is supported via a first drive mechanism 42 so as to be movable in the Y-axis direction, and the first drive mechanism 42 causes the erector arm 36 to move in the Y-axis direction. is moved in the direction of the axis.
The first drive mechanism 42 consists of a pair of jacks attached to the erector arm 36.

In addition, the posture correction mechanism 40 is shown in FIGS. 4 and 5.
As shown in the figure, the segment guide 38 is
a first axis for correcting the attitude of the segment guide 38 by rotating it around a first axis substantially parallel to the axis;
a second attitude correcting means 46 for correcting the attitude of the segment guide 38 by rotating the segment guide 38 around a second axis substantially parallel to the Y axis; a third attitude correction means 48 for correcting the attitude of the segment guide 38 by rotating the segment guide 38 about a third axis substantially parallel to the Z axis; a first position correction means 50 for correcting the position of the segment guide 38 in the direction; and a second position for moving the segment guide 38 in the Y-axis direction to correct the position of the segment guide 38 in the direction. and a correction means 52.

The first position correcting means 50 is arranged between the first and second attitude correcting means 44 and 46, and the second position correcting means 52 is arranged between the second and third attitude correcting means 4.
It is located between 6 and 48.

As shown in FIG. 1, FIG. 2, and FIG. two first bases 56 fixed to the lower ends of the two bases 56; a second base 60 pivotally connected to the first bases 56 by a first shaft 58 extending in the direction of the X-axis; A first base that rotates the second base angularly, ie, by a predetermined angle, around the first axis 58.
and a posture correction jack 62. The first base 56 is connected to and supported by the erector arm 36 by the first drive mechanism 42. 1st
The posture correction jack 62 is composed of a pair of jacks separated in the Z-axis direction. The cylinder portion of each jack is connected to the first base 56 by a pin 64, and the actuating portion that is moved relative to the cylinder portion is connected to the second base 60 by a pin 66. The second base 60 has a recess 68 that opens downward.
has.

The first attitude correction means 44 rotates the second base 60 angularly, that is, by a predetermined angle, around the first axis 58 by means of a first attitude correction jack 62 . As a result, the second base 60 is rotated by a predetermined angle with respect to the first base 56, so the segment guide 38 is rotated by a predetermined angle around the axis of the first shaft 58, that is, the X axis, and the shield body 14's attitude with respect to the inner circumferential surface is corrected.

The first position correcting means 50 is arranged in a recess 68 of the second base 60, as shown in FIGS. a rod 70, a movable base 72 movably supported by both rods, and a movable base 72 that is connected to the rod 70.
The first consists of a pair of jacks that are moved along the
and a position correction jack 74. Rod 70
is supported by the second base 60 of the first posture correcting means 44. First position correction jack 74
As shown in FIGS. 5 and 7, pin 7
6 and 78, the second base 60 and the movable base 72
is connected to.

The first position correction means 50 moves the movable table 72 a predetermined distance in the Z-axis direction with respect to the second base 60 using a first position correction jack 74 .
Thereby, the segment guide 38 is moved a predetermined distance in the Z-axis direction with respect to the second base 60 of the first attitude correction means 44, and its position in the Z-axis direction with respect to the shield body 14 is corrected.

As shown in FIGS. 3 to 6, the second attitude correction means 46 has a second axis 80 extending in the Y-axis direction.
a rotary table 82 pivotally connected to the movable table 72 of the first position correcting means 50; and a second posture correcting jack 84 for rotating the rotary table angularly, that is, by a predetermined angle, around the second axis 80. Equipped with. The rotary table 82 is rotatably supported by the movable table 72 by a bearing 86, as shown in FIGS. 5 and 6. The second attitude correction jack 84 is connected to the moving table 72 and the rotating table 82, as shown in FIG.

This second posture correction means 46 moves the rotary table 82 to the moving table 72 by means of a second posture correction jack 84.
Rotate it by a predetermined angle. This allows the segment guide 38 to move toward the second axis 80, that is, the Y
The shield body 14 is rotated by a predetermined angle around the axis.
The posture with respect to the inner peripheral surface is corrected.

The second position correction means 52 is shown in FIGS.
As shown in the figure, a pair of rods 90 are disposed on the bearing portion 88 of the rotary table 82 of the second posture correcting means 46 so as to be slidable in the Y-axis direction, and are connected to the rods by a pin 92, an X-axis arm 94 extending in the axial direction, and a second
and a position correction jack 96. Rod 90
are arranged at intervals in the direction of the X-axis.

This second position correcting means 52 moves the X-axis arm 94 a predetermined distance in the Y-axis direction with respect to the rotary table 82 using a second position correcting jack 96 .
As a result, the segment guide 38 is moved a predetermined distance in the Y-axis direction with respect to the second attitude correction means 46, and its position in the Y-axis direction with respect to the shield body 14 is corrected.

The third attitude correction means 48 is shown in FIGS.
As shown, a third shaft 98 extending in the Z-axis direction and pivotally connecting the segment guide 38 to the X-axis arm 94 of the second position correction means 52;
and a third attitude correction jack 100 that rotates the segment guide 38 angularly, that is, by a predetermined angle, around the third axis 98. The third attitude correction jack 100 is comprised of a pair of jacks spaced apart in the X-axis direction. Each jack connects the end of the X-axis arm 94 and the segment guide 3.
8.

The third attitude correction means 48 rotates the segment guide 38 by a predetermined angle around the third axis 98 by operating the third attitude correction jack 100. As a result, the segment guide 38
The shield body 14 is rotated by a predetermined angle around the axis.
The posture with respect to the inner peripheral surface is controlled.

As shown in FIGS. 4 and 5, the segment guide 38 includes a guide frame 102 that comes into contact with the lining segment 22, and a connecting portion 104 that connects the guide frame to the X-axis arm 94. The guide frame 102 has a recess that opens downward, and its lower surface is formed into an arcuate surface in order to come into contact with the lining segment 22 and guide it to the correct posture, as shown in FIG. ing.

The segment erector 24 is also shown in FIGS.
As shown in the drawings and FIG. 8, a support mechanism 106 that is engaged with the segment guide 38 and a second drive mechanism 108 that linearly moves the support mechanism in the Y-axis direction with respect to the segment guide 38 are provided.

The support mechanism 106 includes a base member 110, a pressing member 112 that presses the lining segment 22 against the base member 110, a jack 114 that linearly moves the pressing member, and a
A hollow member 116 extending upward in the axial direction is provided.

The base member 110 has a substantially inverted L-shape with a base 118 fixed to the lower end of the hollow member 116 and a receiving part 120 bent downward from the tip of the base and receiving the lining segment 22. have A hole 122 is bored through the lower end of the receiving part 120 in the Z-axis direction.

The pressing member 112 is supported by the base 118 so as to be movable in the Z-axis direction, and is moved toward and away from the receiving portion 120 by the jack 114. As shown in FIG. 4, the pressing member 112 is provided on the lining segment 22 when the pressing member 112 is pushed toward the receiving part 120 by the jack 114 to grip the lining segment 22. hole 126 of the receiving part 120.
22 has a pin 124 received therein.

A jack 114 is attached to a base 118. The hollow member 116 is connected to the segment guide 3
It is received in a guide portion 128 extending upward from the frame 102 of No. 8 so as to be vertically movable.

The second drive mechanism 108 is disposed within the hollow member 116 and also includes a lid 130 fixed to the upper end of the guide portion 128 of the segment guide 38;
It is connected to the bottom of the hollow member 116 by a pin.

As shown in FIG. 1, the lining device 10 also includes a plurality of distance meters 140 for measuring the distance between a virtual reference plane orthogonal to the central axis of the shield body 14 and the front end surface of the segment ring 18. including. The distance meter 140 measures the amount of expansion and contraction of the propulsion jack 20, and measures 90 degrees in the circumferential direction of the shield body 14.
Four propulsion jacks 2 equally spaced by degrees
It is set to 0. The range finder 140 may be another range finder such as a light wave range finder using a laser beam.

As shown in FIGS. 10 and 11, the distance meter 140 includes a cylindrical casing 142 attached to the propulsion jack 20, a drum 144 disposed inside the casing, and one end of which is attached to the propulsion jack. The rope 1 is connected to the tip end 146 of the 20 piston rods, the other end is connected to the drum 144, and the rope 1 is unwound onto the drum 144.
48, a spring 150 that applies a rotational force to the drum 144 in the direction of winding the rope, and a spring 150 that applies a rotational force to the drum 144 in the direction of winding the rope;
The rotary encoder 152 is connected to the rotary encoder 152 and generates an electric signal as the drum 144 rotates.

The drum 144 includes a lid 154 screwed to the casing 142 and an inner wall 15 of the casing 142.
6 and bearings 158, 160 and shaft 162
is rotatably supported around the axis of the casing 142. The spring 150 has one end connected to the lid 15.
4 and the other end is a spiral spring attached to the shaft 162. rotary encoder 15
2 is screwed to the casing 142 and connected to the shaft 162 by a shaft coupling 164.

When the propulsion jack 20 is extended, the distance meter 140 is
As the rope 148 is unwound from the drum 144 and the drum 144 is thereby rotated, the rotary encoder 15 is rotated as the drum 144 rotates.
2 is rotated and outputs an electrical signal according to the rotation speed. The electric signal corresponds to the amount of extension of the propulsion jack 20, and is processed in a signal processing circuit (not shown) as a distance signal between the reference plane, the segment ring 18, and the front end surface.

As described above, when the distances between the reference plane and multiple locations spaced apart in the circumferential direction of the front end surface of the segment ring 18 are measured, the distances between the multiple locations on the front end surface of one existing segment and the reference surface are measured. Compared to the case of measuring the distance of This does not appear as a large error in the determination result, and as a result, the posture of the lining segment 22 held by the segment erector 26 can be corrected to a correct posture according to the posture of the front end surface.

The segment erector 24 is also shown in FIGS.
As shown in the figure, measuring instruments 170, 172, 178, which measure the amount of expansion and contraction of the first, second and third posture correction jacks 62, 84, 100 and the first and second position correction jacks 74, 96, 176,
174.

Each meter 170 is connected to the rod 1 of the jack 62, as shown in FIGS. 12 and 13.
80 with a bolt 182, and a moving rod 186 supported by the measuring device main body 184 so as to be movable in the direction of expansion and contraction of the jack 62.
and a rack 18 provided in the longitudinal direction of the moving rod.
8 and a rotary encoder 192 that is supported by the measuring instrument main body 184 and generates an electric signal as the gear 190 rotates.

The tip of the moving rod 186 is pressed against the cylinder of the jack 62 by a spring 194. Therefore, when the jack 62 expands and contracts, the moving rod 186 advances and retreats as the jack 62 expands and contracts, and the gear 19
0 is rotated, and the rotary encoder 192 outputs an electric signal according to the number of rotations of the gear 190. The electric signal corresponds to the amount of expansion and contraction of the jack 62, and is processed as a signal representing the amount of expansion and contraction of the jack 62 in a signal processing circuit (not shown).

Note that the measuring instrument main body 184 may be fixed to a cylinder instead of being fixed to the rod of the jack. In addition, measuring instruments 170, 172, 174, 176, 1
78 may also use other measuring instruments, such as a light wave distance meter that uses a laser beam.

The first and second drive mechanisms 42, 108 also include
A measuring device (not shown) is provided to measure the amount of expansion and contraction. The measuring device is measuring device 17.
A structure similar to that of 0 can be used.

As shown in FIG. 9, the guide frame 102 of the segment guide 38 includes the distance between the lining segment 22 held by the segment erector 24 and the guide frame 102, that is, the segment guide 38, and the distance between the guide frame 102, that is, the segment guide 38. four sensors 196, 198, 20 that measure the distance between the gripped lining segment 22 and a segment adjacent in the circumferential direction
0, 202 and three sensors 204, 20 that measure the distance between the guide frame 102 and the last existing segment 16 of the segment ring 18.
6,208.

The sensors 196, 198, 200, and 202 are arranged at both ends of the front and rear edges of the guide frame 102 in the X-axis direction, and the sensors 204,
206 and 208 are arranged at the rear end edge of the guide frame 102 at intervals in the X-axis direction.

Each sensor has one of the
As shown in the figure, a base 210 is screwed to the guide frame 102, and a base 210 is attached to the upper side of the base.
2 is screwed, and a cylindrical slider 214 is supported on the base 212 so as to be movable up and down.
14, a sensing bar 216 is arranged so as to be movable up and down,
A sensing head 218 is attached to the lower end of the sensing bar 216.

A rotation source 220 having a motor and a constant rotation mechanism is attached to the base 212, and a gear 224 that meshes with a rack 222 provided on the outer surface of the slider 214 is fixed to the output shaft of the rotation source. There is. A rack 226 is formed on the sensing bar 216, and a rotary encoder 230 having a gear 228 meshing with the rack 226 is provided on the top of the slider 214. Sensing head 2 is located between sensing head 218 and slider 214.
A spring 232 pushing the spring 18 downwards and a bellows 234 surrounding the spring are arranged.

Sensing heads 218 of sensors 196-202 are
It extends in the X-axis direction and contacts the lining segment 22 held by the segment erector 24 when the slider 214 is lowered by the rotation source 220, and also contacts the lining segment 22 when the lining segment 22 is assembled. It is assembled prior to the segment 22 and contacts adjacent segments in the circumferential direction of the segment ring 18. On the other hand, the sensor 204~
The sensing head 218 of 208 extends in the Z-axis direction and contacts the last existing segment of the existing segment 16 when the slider 214 is lowered.

When the slider 214 is lowered by a certain amount by the rotation source 220, each of the above sensors is activated by the sensing bar 216.
and the rotary encoder 230 is lowered,
In this state, the sensing bar 216 and the sensing head 21
8 is raised relative to the slider 214, the gear 2
28 rotates, and as a result, the rotary encoder 230 outputs an electrical signal according to the number of rotations of the gear 228. Electric signals output from the rotary encoders of each sensor are processed in a signal processing circuit (not shown) as signals for determining the attitude of the lining segment 22 and the attitude of the existing segment 16 with respect to the segment guide 38. Ru.

As described above, the distance between the guide frame 102 and the last stage existing segment 16 is measured by the sensor 20.
4, 206, and 208, the distance between the guide frame 102 and the existing segment 16 at the final stage is measured at three points, so it is also possible to check the deformation state of the existing segment 16 at the final stage. can. Such deformation of the existing segment 16 is carried out by the posture correction mechanism 40, for example, the second position correction means 52, based on the measured values by the sensors 204, 206, 208.
This can be corrected by correcting the posture.

Note that other sensors such as a light wave distance meter using a laser beam can also be used as the sensors 196 to 208. Sensors 204, 206, 20
8 measures the distance between the guide frame 102 and the final stage existing segment 16 at three points.
It is also possible to know the deformation of the existing segment ring, which allows the second position correction means to be controlled.

As shown by the two-dot chain line in FIGS. 14 and 15, the sensor 206 includes a sensor 206 that detects the engagement hole 316 of one existing segment 16 that receives the engagement pin 318 of the lining segment 22.
36 are arranged. The sensor 236 is an optical mark reader and reads an optical mark provided near the engagement hole to be sensed.

The segment erector 24 also includes an angle detector 238 that detects the rotation angle of the segment ring 26 with respect to the shield body 14, as shown in FIG.
has. The angle detector 238 includes a rotary encoder attached to the shield ring 32 and a roller provided on the rotary encoder that rotates as the erector ring 26 rotates. A signal is output from the rotary encoder. The output signal of the rotary encoder is processed in the signal processing circuit described above as a signal representing the rotation angle of the segment erector 24 with respect to the shield body 14.

When the lining device 10 is at rest, the posture correction mechanism 40
It is raised toward the erector arm 36 side by the first drive mechanism 42 . The support mechanism 106 is configured such that the lower ends of the base member 110 and the pressing member 112 are connected to the segment guide 38 by the second drive mechanism 108.
It is pulled up into the recess so that it protrudes downward from the recess. In the sensors 196 to 208, the slider 214 is raised relative to the base 212.
In this state, the excavator 12 excavates while extending the propulsion jack 20. The amount of extension of the propulsion jack 20 at this time is measured by the distance meter 140.

After excavating a predetermined distance, the excavator 12 temporarily stops excavating and performs tunnel lining work in this state. This lining work includes a step of transporting the lining segments 22 below the segment guide 38 and assembling the lining segments 22 onto the segment ring 18 by the segment erector 24 in a number equal to the number of lining segments to be assembled. This is done by repeating it several times.

At the time of lining, the propulsion jack 20 is returned to the normal state from the one that obstructs the assembly of the lining segments 22, and is pressed by the assembled segments to prevent the shield body 14 from retreating due to the ground. The amount of contraction of the propulsion jack 20 at this time is continuously measured by the distance meter 140.

During lining, the segment erector 24 first moves the sliders 214 of the sensors 196 to 208 onto the base 21.
2, the posture correction mechanism 40 is lowered by the first drive mechanism 42. Thereby, the segment guide 38 is brought closer to the lining segment 22.

The segment erector 24 is then driven through the hole 122 of the support mechanism 106 by the second drive mechanism 108.
and the pin 124 is the hole 1 of the lining segment 22.
After the support mechanism 106 is lowered until it faces the base member 110, the jack 114 advances the pressing member 112 with respect to the base member 110. This results in
The pin 124 is inserted into and engaged with the hole 126 of the lining segment 22, and the pin 124 is inserted into and engaged with the hole 126 of the lining segment 22.
2 is held by the receiving portion 120 and the pressing member 112. In this state, the segment 22 is
It is spaced apart from segment guide 38.

When the lining segment 22 is gripped by the support mechanism 106, the segment guide 38 and the lining segment 22 are inserted into the hole 126 of the lining segment 22.
The relative positional relationship between the receiving portion 120 of the support mechanism 106 and the pressing member 112 is corrected so that the portion having the . This correction work is
The lining segment 22 is moved to the segment erector 24.
The segment guide 38 is moved relative to the lining segment 22 by the first, second and third attitude correction means 44, 46, 48 and the first and second position correction means 50, 52. This can be done by moving.

Next, the segment erector 24
06 is raised by the second drive mechanism 108 until the lining segment 22 and the segment guide 38 come into contact. Thereby, the lining segment 22 is connected to the segment guide 38 and the support mechanism 10.
6, the segment guide 38 is held in close contact with the segment guide 38.

When the lining segment 22 is held by the segment erector 24 as described above, the sensors 196 to
202, the sensing head 218 is pushed by the lining segment 22 and the sensing bar 216 is pushed by the spring 232.
is raised against the sensing head 216 against the force of the sensor. The amount of movement of the sensing bar 216 at this time is measured by a rotary encoder 230, and in a signal processing circuit (not shown), the distance between the segment guide 38 and the lining segment 22, that is, the attitude of the lining segment 22 with respect to the segment guide 38. It is processed as a signal indicating.

Thereafter, the segment erector 24 operates the rotation mechanism 30 to rotate the erector ring 26 by a predetermined angle, and operates the first drive mechanism 42 to move the lining segment 22 into the segment ring 1.
After it is assembled at a predetermined position on the front end surface of 8, it returns to its initial state.

Connect the lining segment 22 to the segment ring 18
When assembled into a sensor 196-208, the sensing head 218 is pushed by the existing segment 16 and the circumferentially adjacent segment so that the sensing bar 216 moves against the sensing head 21 against the force of the spring 232.
6 will be moved. Sensing bar 216 at this time
The amount of movement is measured by a rotary encoder 230, and a signal processing circuit (not shown) calculates the distance between the existing segment 16 and the lining segment 22, that is, the distance of the lining segment 22 from the existing segment 16 and the circumferentially adjacent segment. It is processed as a signal indicating posture.

The amount of expansion and contraction of the first drive mechanism 42 when gripping the lining segment 22 and assembling it to the front end surface of the segment ring 18 and the amount of expansion and contraction of the second drive mechanism when gripping the lining segment 22 are as follows: Each is measured by a measuring device not shown. Further, the amount of expansion and contraction of the jacks 62, 74, 84, 96, 100 when gripping the lining segment 22 and assembling it to the front end surface of the segment ring 18 is measured by measuring instruments 170 to 178.

When assembling the lining segment 22 in a predetermined position, the segment guide 38 is shielded by the first, second, and third attitude correction means 44, 46, 48 and the first and second position correction means 50, 52. Attitude and Y with respect to the inner peripheral surface of the main body 14
The position in the axis and Z-axis directions is corrected. This correction is performed by determining the attitude of the lining segment 22 with respect to the existing segment 16 using the output signals of each distance meter 140, measuring instruments 170 to 178, and sensors 196 to 208 in the signal processing circuit, and based on the determination result. Thereby, the attitude and position of the lining segment 22 with respect to the shield body 14 are corrected, so that the lining segment 22 is placed in the correct attitude and position.

Next, determination of the attitude of the front end surface of the segment ring 18 with respect to a reference plane perpendicular to the Z-axis and correction of the attitude of the lining segment 22 will be described based on the measured value by the range finder 140.

As shown in FIG. 18, the plane on which the propulsion jack 20 is arranged is a virtual reference plane 250, the turning plane of the erector ring 26 of the segment erector 24 is 252, and the front end surface of the segment ring 18 is 250.
4. The ideal front end surface that intersects the front end surface on the Z axis Z and is parallel to the reference plane 250 is 256, the front end surface 254
The point on the Z-axis Z where the ideal front end surface 256 intersects is the origin 258 of the XY coordinates, the rangefinders placed on the Y-axis are 140a, 140c, the rangefinders placed on the X-axis are 140b, 140d, and the origin The angle θ in the circumferential direction with 258 as the center is measured by the rangefinder 140a,
The directions of 0b, 140c, and 140d are each 0
degrees, 90 degrees, 180 degrees, and 270 degrees.

The distance Ha between the front end surface 254 and the ideal front end surface 256 when θ is 0 degrees, 90 degrees, 180 degrees, and 270 degrees,
Hb, Hc, Hd are distance meters 140a, 140b,
The measured values of 140c and 140d are La, Lb, and
Assuming Lc and Ld, it can be calculated as Ha=(La-Lc)/2 Hb=(Lb-Ld)/2 Hc=(Lc-La)/2 Hd=(Ld-Lb)/2.

Further, the distance H between the front end surface 254 and the ideal front end surface 256 at an arbitrary angle θ in the circumferential direction on the circumference centered on the origin 258 can be determined by H=Hacos θ+Hbsin θ.

The X, Y coordinate system consisting of the X-axis and Y-axis described above is the one when the segment erector 24 is at the origin position (the position shown in the figure). However, when the segment erector 24 rotates by an angle θ around the Z-axis, the XY coordinate system also rotates by θ around the Z-axis, and the axes of the coordinate system at that time are the X' axis and Y' axis. and the ideal front end surface 256 with respect to the front end surface 254.
When the inclination on the X' axis is αθ, the inclination on the Y' axis is βθ, and the radius of the reference surface 250 is r, αθ can be determined by tanαθ=H/r=(Hacosθ+Hbsinθ)/r.

Further, since βθ is equal when shifted by 90 degrees from θ, βθ can be determined by tanβθ=tanα(θ+90)=(Hbcosθ−Hasinθ)/r.

These calculations are performed by the signal processing circuit described above. The signal processing circuit uses these calculation results, the first
and a measuring instrument for the second drive mechanism 42, 108;
Measuring instruments 170-178 and sensors 196-20
Each jack 62, 74, 8 based on the measured value of 8
Controls 4,96,100.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of a shield tunnel excavator equipped with the lining device of the present invention, Fig. 2 is a right side view of Fig. 1, and Fig. 3 is a view taken along the - line in Fig. 2. 4 is a sectional view taken along the - line in Fig. 2, Fig. 5 is a sectional view taken along the - line in Fig. 4, and Fig. 6 is a sectional view taken along the - line in Fig. 5. - Figure 7 is a cross-sectional view taken along the - line in Figure 6, Figure 8 is a cross-sectional view taken along the - line in Figure 4, and Figure 9 is a cross-sectional view taken along the - line in Figure 6. A plan view of the segment guide, FIG. 10 is a partially cutaway front view of the rangefinder, FIG. 11 is a right side view of the rangefinder, and FIG.
The figure is a front view showing an embodiment of the measuring instrument, Fig. 13 is a plan view of the measuring instrument, Fig. 14 is a front view showing an embodiment of the sensor, and Fig. 15 is taken along line XV-XV in Fig. 14. 16 is a perspective view showing an embodiment of the lining segment, FIG. 17 is a perspective view for explaining the segment ring, and FIG. 18 is a view for explaining the correction method. It is. 12... Shield tunnel excavator, 14... Shield body, 16... Existing segment, 18...
Segment ring, 20... Propulsion jack, 22
... Lining segment, 24 ... Segment erector, 26 ... Erector ring, 30 ... Rotation mechanism, 36 ... Erector arm, 38 ... Segment guide, 40 ... Posture correction mechanism, 42,108
...first and second drive mechanisms, 44, 46, 4
8...first, second and third posture correction means, 5
0,52...first and second position correction means, 5
4... Sliding shaft, 56, 60... First and second bases, 62, 84, 100... First, second and third attitude correction jacks, 74, 96... First and second Position correction jack, 72...Movement table,
82... Rotating table, 94... X-axis arm, 98...
Axis, 140... Distance meter, 170-178... Measuring instrument, 184... Measuring instrument body, 186... Moving rod,
188...Rack, 190...Gear, 192...
Rotary encoder, 196-208...sensor.

Claims (1)

[Claims] 1. A segment ring 1 which is disposed at the rear of the shield body 14 of the shield tunnel excavator 12, grips the tunnel lining segment 22, and connects the tunnel lining segment to a segment ring 1 consisting of a plurality of existing segments 16.
The distance between the segment erector 24 to be assembled to the segment ring 8 and the front end surface of the segment ring and an imaginary reference plane that is arranged at intervals in the circumferential direction within the shield body and perpendicular to the central axis of the shield body. multiple range finders 140 for measuring
and a signal processing circuit that determines the attitude of the front end surface of the segment ring based on the measurement value of the distance meter, and the segment erector 24 determines the attitude of the gripped lining segment 22 by the signal processing circuit. A tunnel lining device comprising an attitude correction mechanism 40 for correcting the attitude of the front end face of the segment ring 18 to a correct attitude according to the attitude of the front end surface of the segment ring 18 determined by a circuit. 2 The segment erector 24 includes an erector ring 26 that is rotatably arranged around its axis within the shield body 14, a rotation mechanism 30 that rotates the erector ring, and a rotation mechanism 30 that is arranged at intervals in the circumferential direction of the erector ring. and a plurality of erector arms 36 extending rearward from the erector ring, and a segment guide 38 for guiding the lining segment 22 to a correct posture. When an axis extending in the direction of the axis is the Z axis, an axis perpendicular to the Z axis and extending in the diametrical direction of the erector ring is the Y axis, and an axis perpendicular to the Y axis and the Z axis is the X axis. , a posture correction mechanism 40 disposed on the erector arm so as to be movable in the Y-axis direction, a first drive mechanism 42 for moving the posture correction mechanism, and a posture correction mechanism 42 disposed on the segment guide so as to be movable in the Y-axis direction. a support mechanism 106 having an engaging portion 124 that is supported and releasably engaged with the lining segment; and a support mechanism 106 that is moved to releasably grip the segment between the segment guide and the support mechanism. The tunnel lining device according to claim 1, further comprising a second drive mechanism 108 for causing the tunnel lining. 3. The attitude correction mechanism 40 includes a first attitude correction means 44 for correcting the attitude of the segment guide by rotating the segment guide 38 around a first axis substantially parallel to the X-axis; a second attitude correction means 46 for correcting the attitude of the segment guide by rotating the segment guide around a second axis substantially parallel to the Y-axis;
third attitude correction means 4 for correcting the attitude of the segment guide by rotating the segment guide around a third axis substantially parallel to the Z-axis;
8, and a first position correction means 50 for moving the segment guide in the Z-axis direction and correcting the position of the segment guide in the direction.
and a second position correction means 52 for moving the segment guide in the Y-axis direction and correcting the position of the segment guide in the direction. Lining equipment. 4. The first attitude correction means 44 includes a sliding shaft 54 disposed on the erector arm 36 so as to be slidable in the Y-axis direction, a first base 56 provided on the sliding shaft, and a second base 60 coupled to the first base so as to be angularly rotatable about an axis extending in the direction; a first attitude correction jack 62 for rotating the first position correction means 5;
0 includes a movable table 72 supported movably in the Z-axis direction by the second base, and a first position correction jack 74 for moving the movable table, and the second posture correction means. 46 includes a rotary table 82 supported by the movable table so as to be angularly rotatable around an axis extending in the Y-axis direction, and a second attitude correction jack 84 for rotating the rotary table. The second position adjusting means 52 includes an X-axis arm 94 extending in the X-axis direction, which is supported by the rotary table 82 so as to be slidable in the Y-axis direction, and an X-axis arm 94 that moves the X-axis arm with respect to the rotary table. 2 position correction jacks 96, and the third posture correction means 48 is provided with a position correction jack 96 of
Claim 3 comprising a shaft 98 extending axially and pivotally connecting said segment guide 38 to said X-axis arm, and a third attitude correction jack 100 for rotating said segment guide about said shaft. Tunnel lining equipment as described in Section. 5 the first, second and third posture correction jacks 62, 84, 100 and the first and second posture correction jacks 62, 84, 100;
Each of the position correction jacks 74 and 96 includes a means 170 for measuring the amount of extension of the corresponding jack.
172, 178, 176, 174, the tunnel lining device according to claim 4. 6 The measuring means 170, 172, 178, 17
6,174 is the corresponding jack 6
2, 84, 100, 74, and 96, and a movable rod supported by the measuring device body so as to be movable in the direction of expansion and contraction of the jack, which is slidable in the longitudinal direction. 188 is formed, and is moved in the expansion and contraction direction as the jack expands and contracts; a gear 190 that meshes with the rack of the movement rod; A rotary encoder 19 that generates an electric signal accordingly.
2. The tunnel lining device according to claim 5, comprising: 7 The segment guide 38 includes sensors 196, 198, 200, 202 that measure the distance between the segment guide and the lining segment 22 held by the segment erector 24, and sensors 196, 198, 200, 202 that measure the distance between the segment guide and the segment ring. The tunnel lining device according to claim 1, comprising sensors 204, 206, and 208 for measuring the distance between the tunnel lining devices.