JP4684049B2 - Shield tunneling machine and method for measuring tail clearance and / or space dimension in segment tunnel - Google Patents

Description

  The present invention relates to a shield machine and a method for measuring tail clearance and / or space dimensions in a segment tunnel. In particular, the machine can measure the excavator and tail clearance, etc. in parallel. The present invention relates to a shield machine capable of automatically measuring an inner space dimension of an arbitrary segment ring behind a tail, and a method for measuring a tail clearance and / or an inner space dimension of a segment tunnel.

  In the shield construction method, it is extremely important to manage the tail clearance between the inner surface of the skin plate of the shield machine and the outer surface of the segment, and the inner space of the existing segment ring. During excavation, the relative positional relationship between the skin plate and the existing segment ring is likely to shift (eccentricity). Therefore, it is necessary to measure the tail clearance accurately and quickly as appropriate according to the excavation. come. Based on the measurement results, it is possible to make early adjustments to the shield excavator's excavation control and segment assembly methods, etc., and to correct the eccentricity between the shield excavator's axis and the segment ring axis at an early stage. Can do.

  By the way, the above-mentioned measurement of tail clearance and the like is conventionally performed by a worker using a convex, steel tape, wedge-shaped measuring piece, etc., and the measurement is also a segment ring assembled according to the progress of the shield machine. It was done for every ring. In the shield method, construction is performed by repeating a cycle that is roughly composed of digging with a shield machine, assembly of segment rings with an erector device, measurement of tail clearance, etc., so much time is required for measurement of tail clearance, etc. As a result, the construction period was often prolonged. In addition, since measurement is performed by workers close to the shield jack, the safety at the time of measurement is regarded as a problem, and it is necessary to work at high places as the section of the shield tunnel to be constructed becomes larger. Therefore, since the concern about construction safety at the time of measurement has become more prominent, the improvement has been desired.

  Various techniques related to a shield machine and a measuring method thereof having a measuring device that automatically measures the tail clearance and the like have been proposed to deal with the above-described conventional problems. In Patent Document 1, two ultrasonic sensors are attached to an erector device, the distance to the inner surface of the segment is measured with one sensor, the distance to the inner surface of the ring girder is measured with the other sensor, and the thickness and skin of the segment are measured. A measuring apparatus and method for determining tail clearance from the distance from the plate to the inner surface of the ring girder (both known) and the above measured values are disclosed. The tail clearance on the outer periphery of the segment ring is automatically obtained by performing the measurement and the calculation of the tail clearance based on the measurement result in the circumferential direction while rotating the electre device along the ring girder.

  Patent Document 2 discloses a tunnel excavator in which a tail clearance measuring mechanism (sensor head) is provided on a spreader of a shield jack. When the excavator is excavating, the spreader is fixed relative to the existing segment, so in this posture, the distance to the inner surface of the segment and the distance to the inner surface of the skin plate are measured in parallel with the excavation of the excavator. And tail clearance can be measured.

  Further, Patent Document 3 discloses an invention relating to a tail clearance measuring device in which a concave portion is provided on the inner peripheral surface of the skin plate at the rear of the shield machine and an ultrasonic distance meter is installed in the concave portion to measure the tail clearance. Has been. This apparatus is further provided with a cleaning means for cleaning when soil or sand adheres to the ultrasonic distance meter.

  Further, in Patent Document 4, distance sensors are fixed in a predetermined direction at a plurality of locations on the inner surface of the skin plate, and the distance to the inner surface of the segment and the inner surface of the skin plate is measured by each sensor, and the segment thickness is determined. An invention relating to a measuring device and a measuring method for obtaining tail clearance in consideration is disclosed.

Japanese Patent Laid-Open No. 11-294072 JP-A-7-208073 Japanese Patent Laid-Open No. 7-173996 JP-A-6-180095

  According to the tail clearance measuring device and the measuring method disclosed in Patent Document 1, the tail clearance can be automatically measured quickly and with high accuracy. However, since the measurement range is limited to the vicinity of the erector device, automatic measurement at any measurement point (in the measurement target plane) behind the extending direction of the shield machine cannot be performed. In other words, according to the excavation of the shield machine, it is possible to measure whether or not the inner space of the arbitrary segment ring behind the machine tail has a predetermined inner space and holds a perfect circle. Although it is necessary for management, it is impossible for this measuring apparatus to automatically measure the measurement of the rear segment ring. Even if the erector device is configured to be movable in the extending direction of the shield machine, there is a problem that it interferes with the perfect circle holding device of the segment ring. In addition, by adopting a configuration that includes a sensor in the erector device that actually assembles the segment, tail clearance measurement becomes virtually impossible when the segment is assembled, thus greatly increasing the problem of prolonging the construction period described above. It does not lead to improvement.

  Further, according to the tunnel excavator of Patent Document 2, since the excavation of the excavator and the measurement of the tail clearance can be performed at the same time, the construction period can be greatly shortened. However, since the measurement range is limited to the vicinity of the spreader, as described above, it is not possible to measure the inner dimension of an arbitrary segment ring behind the machine tail according to the excavation of the shield machine. The same problem applies to the shield machine of Patent Document 3. Moreover, in the shield machine of patent document 3, although the earth and sand adhering to the ultrasonic distance meter is comprised with the structure wash | cleaned with air or water, the problem of the maintenance at the time of becoming impossible to measure is caused by improper washing. I can't deny it. Further, according to the tail clearance measuring device of Patent Document 4, as with Patent Document 2, it is possible to simultaneously perform the excavation of the excavator and the measurement of the tail clearance. Therefore, it is not possible to measure the inner dimension of any segment ring behind the machine tail.

  The shield machine according to the present invention and the method for measuring the tail clearance and / or the segment tunnel air dimension have been made in view of the above-mentioned problems, and the excavator machine and the tail clearance or the segment tunnel air dimension measurement. In addition, the measurement of the inner dimensions of any segment ring behind the machine tail (checking whether or not a perfect circle is held) is also performed in parallel with the shield machine. It is an object of the present invention to provide a shield machine capable of automatic measurement and a method for measuring tail clearance and / or air space dimensions in a segment tunnel.

  To achieve the above object, a shield machine according to the present invention is provided inside a skin plate of a shield machine, extends in the extending direction of the shield machine, is rotatable around the shaft member, and The moving device is movable at least in the extending direction of the shaft member, and a measuring device mounted on the moving device, and the rotation of the moving device around the shaft member and the moving device in the extending direction. According to the movement, the measuring device is configured to be able to measure the tail clearance between the inner surface of the skin plate of the shield machine and the outer surface of the segment tunnel, and / or the inner dimension of the segment tunnel.

  Here, the shield machine refers to the tunnel machine while excavating in hard ground such as rock bed where the face can stand independently, in addition to the shield machine used in the shield construction method to construct a segment tunnel in relatively soft ground. It also means including the TBM (tunnel boring machine) to be constructed. In addition, the skin plate constituting the outer shell of the shield machine has a circular cross section and also includes a rectangle (square). In the case of a circular cross section, a face plate is rotatably provided on the front surface of the skin plate. In the case of a rectangular cross section, a rocking cutter having a cross or rhombus, boomerang shape, rectangular shape or the like made of cutspoke is provided on the front surface of the skin plate.

  In the shield machine of the present invention, for example, an annular shaft member extending in the extending direction of the machine is provided at the center of the skin plate. The shaft member is provided with a moving device that can rotate (revolve) around the shaft member and can move in the extending direction of the shaft member. For example, the moving device can be an embodiment having a configuration in which the surface of the shaft member can be driven by a roller and an arm portion for preventing the shaft member from falling is provided, and the form thereof is not particularly limited. Absent. The moving device is equipped with a measuring device having an appropriate configuration. The measuring device includes a caliper extending to the inner surface of the skin plate and the segment inner surface of the existing segment ring, a non-contact type measuring device, and the like.

  By operating the measuring device during rotation around the shaft member of the moving device, the distance from the shaft member to the inner surface of the skin plate or the segment in the plane perpendicular to the shaft center at an arbitrary point of the axis of the shield tunnel It can be measured over 360 degrees. For example, the distance to the inner peripheral wall surface of the segment ring installed in the excavator and installed in the excavation mine is measured over 360 degrees, and the distance to the inner peripheral wall surface of the skin plate ahead of the direction of excavation is measured in the same way By doing this, automatic measurement of the roundness of the segment ring and automatic measurement of the roundness of the skin plate (for example, when the excavator has a circular cross-section) are performed. By taking this into consideration, it is possible to automatically measure the tail clearance over 360 degrees in consideration of the eccentricity of the axis of both the segment ring and the skin plate.

  Furthermore, by appropriately adjusting the extension of the shaft member, the moving device moves along the extending direction of the shaft member, so that the inner dimension of an arbitrary segment ring located behind the machine tail can be increased. Measurements can be performed without being influenced by the situation and in parallel with the excavation of the excavator. In particular, the inner dimension of the segment ring after the machine tail has passed is likely to be different from that during assembly installation due to the action of earth pressure, etc. Since the degree can be measured, when the roundness is not ensured, the perfect circle holding device can be moved and installed on the segment ring, and the inner dimension can be corrected at an early stage.

  Moreover, in a preferred embodiment of the shield machine according to the present invention, the shaft member is a pipe member that internally forms a work passage provided in the center of the shield machine.

  In general, a work path for workers is secured inside the skin plate of the shield machine. For example, in a shield machine with a circular cross section, the work path is located inside a steel pipe member coaxial with the axis. Is provided. In the present invention, the excavator is configured such that a pipe member provided in advance in the shield machine is used, and a moving device including a measuring device can be moved around the pipe member. In addition, it becomes possible to measure the inner space dimension of the existing segment ring far away from the shield machine by attaching the above-described moving device to the subsequent carriage behind the machine tail.

  In another embodiment of the shield machine according to the present invention, the moving member is a ring member provided on an outer periphery of the pipe member.

  For example, the ring member can be rotated via a bearing on the outer periphery of the tube member and can be moved in the extending direction of the tube member, or a thread groove is provided on the outer periphery of the tube member. An embodiment or the like corresponding to the nut can be applied. Further, by mounting a plurality of measuring devices (for example, four measuring devices at 90 ° intervals) in the circumferential direction of the ring member, 360 ° of the inner surface of the skin plate or the inner surface of the segment ring can be obtained even if the ring member does not rotate once. Measurement is possible, and the measurement time can be shortened.

  In another embodiment of the shield machine according to the present invention, the moving device is equipped with a telescopic device that can expand and contract from the shaft member toward the skin plate, and the measuring device is attached to the tip of the telescopic device. It is characterized by being mounted.

  The embodiment of the telescopic device is not particularly limited, but when the measuring device is a non-contact type measuring device or the like, the measuring accuracy is improved by transferring the measuring device as close as possible to the measurement point. It becomes possible to raise. As the tunnel becomes larger in cross section, the effect becomes higher. Here, the expansion and contraction from the shaft member toward the skin plate direction means that, for example, when the shield machine has a circular cross section, it can expand and contract in the radial direction from a tube member coaxial with the shaft center. ing.

  Another advantage of providing the telescopic device is that the measuring device can be prevented from interfering with the perfect circle holding device or the like as the moving device moves. As described above, when it is desired to transfer the measuring device as close as possible to the measurement point or to the measurement point, if the moving device is moved in the extending direction of the tube member in that posture, the measuring device becomes a perfect circle holding device or the like. Therefore, the movement of the measuring device (moving device) is limited. Therefore, when the moving device moves in the extending direction of the tube member, the telescopic device contracts in the tube member direction to prevent other internal devices such as a perfect circle holding device and the measuring device from interfering with each other. When the moving device is moved to the position, the expansion / contraction device is extended again, and the above-described problem is solved by adopting a configuration in which the measuring device provided at the tip of the moving device can be transferred to the vicinity of the measuring point or to the measuring point.

  In another embodiment of the shield machine according to the present invention, the telescopic device is configured by a plurality of arms having arcs having the same diameter as the pipe member being rotatably attached to each other. It is characterized by.

  The present invention relates to an embodiment of a telescopic device. Prepare multiple arc arms with the same diameter as the pipe member and connect each arm end to each other so that they can rotate. This arm is accommodated along the outer peripheral surface of the pipe member, so that the moving device and the measuring device do not interfere with other devices when the moving device moves.

  In another embodiment of the shield machine according to the present invention, the telescopic device has a pantograph shape in which the ends of two links connected in an X shape are connected to the ends of other X links having the same configuration. It is comprised by these.

  The present invention relates to another embodiment of the telescopic device. By connecting the ends of two links connected in an X-shape to the ends of other X-shaped links having the same configuration to form a pantograph, the measuring device provided at the tip of the link can be expanded or contracted, for example. It becomes possible to transfer freely in the radial direction of the tube member.

  In addition to the embodiment composed of a plurality of arms and the pantograph-like embodiment described above, the embodiment of the telescopic device is an embodiment (tunnel) in which a lot enters and exits from a cylinder and a measuring device is attached to the tip of the lot. Depending on the size of the cross section, a plurality of small diameter cylinders can enter and exit sequentially from the inside of the cylinder, and a lot enters and exits from the inside of the smallest diameter cylinder).

  In another embodiment of the shield machine according to the present invention, the measuring device comprises a distance sensor.

  As the distance sensor, for example, an ultrasonic distance sensor or a light wave distance sensor can be used. When using any distance sensor, if the distance between the distance sensor and the point to be measured is relatively long, the distance to the desired measurement point is increased by three-dimensionally spreading ultrasonic waves and light waves. There is a problem that it is impossible to measure accurately. Therefore, when such a distance sensor is applied as a measuring device, the distance sensor is mounted on the tip of the extension device described above, and the distance sensor is transferred to a position that is the distance to the measurement point optimum for the distance sensor. It is desirable. The telescopic device can calculate its own length when stretched and the angle when stretched in the plane perpendicular to the axial direction of the tube member. From the angle and length, the distance to the inner surface of the skin plate and the distance to the inner surface of the segment are calculated.

  In another embodiment of the shield machine according to the present invention, the measuring device comprises a wire take-up device and a wire provided at the tip of the expansion / contraction device, and the expansion / contraction device contacts the inner surface of the skin plate or the segment. The distance is measured by the wire length extending from the inner surface to the shaft member.

  Attach the wire take-up device to the tip of the telescopic device, extend the telescopic device to the desired point to be measured, and place the wire take-up device in contact with the inner surface of the skin plate, etc. The internal length is measured by this wire length.

  Further, in another embodiment of the shield machine according to the present invention, the telescopic device is the measuring device, and the distance from the inner surface to the shaft member by bringing the telescopic device into contact with the inner surface of the skin plate or the segment. Is measured.

  The present invention relates to an embodiment in which the telescopic device itself also serves as a measuring device. For example, a pressure sensor or the like is attached to the distal end of the expansion / contraction device, and the pressure sensor detects that the expansion device has extended to the inner surface of the skin plate or the like, and the skin is determined from the total length of the expansion / contraction device at that time. An embodiment in which the distance to the inner surface of a plate or the like is automatically calculated can be applied.

  Also, the method for measuring the tail clearance and / or the segment tunnel inner dimension according to the present invention measures the tail clearance between the skin plate inner surface of the shield machine and the segment tunnel outer surface, and / or the segment tunnel inner dimension. A measuring method, wherein the shield machine has a moving device capable of rotating around a pipe member that constitutes a work path and movable in an extending direction of the pipe member, and is attached to the moving device. A telescopic device is provided, and the distance between the inner surface and the pipe member is measured by extending the telescopic device to the inner surface of the skin plate or the segment, while rotating the moving device around the pipe member. By measuring this, automatic measurement of the distance to the inner surface in any plane is performed, and the moving device is While moving in the extending direction of the member, by measuring the distance to the inner surface of the arbitrary plane, characterized in that the distance automated measurement of the plurality plane is performed.

  The measuring method of the present invention is a shield machine capable of rotating the outer periphery of a pipe member provided with a working passage inside, and further capable of moving in the extending direction and provided with a moving device provided with the aforementioned expansion and contraction device. The present invention relates to a measuring method for measuring the distance to the inner surface of a skin plate or the like. The distance to the inner surface of the skin plate and the distance to the inner surface of the segment ring in an arbitrary plane perpendicular to the extending direction of the pipe member are obtained by an expansion / contraction device extending to each surface, and the moving device rotates 360 degrees so that the inside of the skin plate Both the distance to the peripheral surface and the distance to the inner peripheral surface of the segment ring are required. The relative deviation (eccentricity) of the segment ring with respect to the inner peripheral surface of the skin plate can be easily obtained from the fact that the measurement origin is a coaxial pipe member. Tail clearance can be determined.

  When the measurement in the arbitrary plane is completed, the telescopic device is contracted in the tube member direction, the moving device moves to the rear of the tube member in the extending direction, for example, to any existing segment ring behind the machine tail, and the telescopic device expands again. At the same time, when the moving device rotates, the inner dimension of the segment ring is obtained, and the roundness is confirmed.

  Furthermore, the method for measuring tail clearance and / or segment tunnel inner dimension according to the present invention measures the tail clearance between the skin plate inner surface of the shield machine and the segment tunnel outer surface, and / or the segment tunnel inner dimension. A measuring method, wherein the shield machine has a moving device capable of rotating around a pipe member that constitutes a work path and movable in an extending direction of the pipe member, and is attached to the moving device. Expansion device and a distance sensor provided at the tip of the expansion device, and the distance to the inner surface is measured with the distance sensor in a posture in which the expansion device is extended to the vicinity of the inner surface of the skin plate or the inner surface of the segment. Measure and measure the distance while rotating the moving device around the pipe member, Automatic measurement of the distance to the inner surface is performed, and the distance to the inner surface in the arbitrary surface is measured while moving the moving device in the extending direction of the pipe member, thereby automatically measuring the distance in a plurality of surfaces. Is performed.

  The measuring method of this invention is related with the measuring method with which the distance sensor mentioned above was provided in the front-end | tip of the expansion-contraction apparatus. In place of the distance sensor, the wire described above can be used as a measuring device.

  As can be understood from the above description, according to the shield machine of the present invention and the method for measuring the tail clearance and / or the space dimension in the segment tunnel, the outer periphery of the shaft member composed of a pipe member or the like provided with a working passage inside. And moving the shaft member in the extending direction of the shaft member, and using a shield machine equipped with a measuring device and, if necessary, an expansion / contraction device, the shield machine, In parallel, the tail clearance and the like can be measured, and the construction period can be shortened. Further, according to the shield machine of the present invention and the method for measuring the tail clearance and / or the segment tunnel inner dimension according to the present invention, the inner dimension (for example, roundness) of the segment ring behind the machine tail Regardless of the progress of the machine drilling, it can be measured at any time, so it is possible to check the internal dimensions of the segment ring (quality control) at any time.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an embodiment of a shield machine according to the present invention, illustrating a measurement method according to the present invention, FIG. 2 is a view taken along arrow II-II in FIG. 1, and FIG. , an enlarged view of III _a portion of FIG. 1, FIG. 3b shows an enlarged view of III _b of FIG. 2, respectively. 4 is a diagram illustrating the measurement method of the present invention following FIG. 1, FIG. 5 is a view taken along the arrow V-V of FIG. 4, and FIG. FIG. 7 is a view taken along the line VII-VII in FIG. FIG. 8 is a diagram illustrating the measurement method of the present invention following FIG. 6, FIG. 9 is a view taken along arrow IX-IX in FIG. 8, and FIG. 10 is a diagram following FIG. FIG. 11 is a view taken along the line XI-XI in FIG. 10. 12 and 13 are cross-sectional views of other embodiments of the shield machine according to the present invention. In the illustrated embodiment, one expansion / contraction device is attached to the ring-shaped moving device, but it goes without saying that the internal structure of the shield machine of the present invention is not limited to such an embodiment. It is. For example, the moving device may have a shape other than the ring shape, and in the case of the ring shape illustrated in the moving device, a plurality of expansion devices (for example, four at 90 degree intervals) are provided in the ring direction. Etc. Furthermore, the expansion / contraction apparatus may be in a form in which a lot enters and exits from a cylinder, in addition to the illustrated embodiment.

  FIG. 1 is a longitudinal sectional view showing an embodiment of a shield machine according to the present invention, and is a diagram for explaining a measuring method according to the present invention. In this shield machine 1, a face plate 31 provided with a number of cutter bits 31 a, 31 a,... A chamber 33 is defined by a partition wall 32 facing the board 31, and a mud drilling pipe 34 and a mud pipe 35 communicating with the chamber 33 extend to the rear of the excavator, and further, the shaft center of the excavator A worker's passage pipe 4 that is coaxial with the pipe is provided. The segments S, S,... Are assembled in a ring shape inside the skin plate 2 by the erector device 37, and the shield machine 1 is installed in the excavation mine at the same time as or after the excavation in the ground G. At the same time as or after assembly of the segments S, S,..., The tail void is filled with the backfill material a from the machine tail 21, and the machine tail 21 has tail brushes 22, 22, ... is provided to prevent intrusion of earth and sand and groundwater into the excavator. The shield machine 1 digs up the excavator by transmitting a thrust force from the jack from the frame 38 inside the skin plate 2 to the entire excavator while taking a reaction force on the segment S by the extension of the shield jack 36.

  Inside the skin plate 2 (inside the assembled segment ring), a perfect circle holding device 5 for securing / correcting the roundness of the segment ring is provided so as to be movable in the extending direction of the excavator. . The perfect circle holding device 5 includes an upper half member 51 and a lower half member 52, and a stroke jack 53 that connects the upper half member 51 and the lower half member 52. In FIG. 1, it moves so as to ensure the roundness of the segment ring immediately after the perfect circle holding device 5 indicated by the two-dot chain line is assembled (X direction), and the stroke jack 53 extends inside the segment ring. By doing this (Y direction), the upper half member 51 and the lower half member 52 are adjusted so as to have a predetermined roundness while pressing the segment ring from the inside.

  A moving device 6 having a ring shape and having a roller inside is attached to the outer periphery of the passage pipe 4. The moving device 6 can rotate (revolve) around the passage pipe 4, and It can move in the extending direction (Z direction) of the piping 4 for use. The moving device 6 is provided with a telescopic device 7 which will be described later.

  FIG. 2 is a view of the inside of the shield machine 1 of FIG. 1 as viewed from the front. An erector device 37 is disposed outside the passage piping 4, and a ring-shaped moving device 6 is rotatably mounted on the outer periphery of the passage piping 4. FIG. 2 shows a state in which the expansion / contraction device 7 is contracted. However, when the moving device 6 moves in the extending direction of the passage pipe 4, the expansion / contraction device 7 contracts as shown in FIG. A posture that hardly protrudes can be secured. Therefore, the moving device 6 can freely move without interference between the moving device 6 (extension device 7) and the like with the erector device 37 disposed on the outer periphery thereof, a perfect circle holding device (not shown), or the like.

Figure 3a is an enlarged view of III _a portion of FIG. 1, FIG. 3b shows an enlarged view of III _b of FIG. 2, respectively. The tail void T is a space between the skin plate 2 and the segment S. Usually, the tail void T is constructed so that the tail void T has the same width in the circumferential direction (distance from the skin plate 2 to the segment S). It is. However, since the segment ring is assembled while the excavator excavates in the ground, the axis of the skin plate 2 and the axis of the segment ring are likely to be displaced (eccentric). Change. By correcting the eccentricity at an early stage, it is possible to construct a shield tunnel along the planned vertical line.

  FIG. 4 is a diagram showing a measurement method following FIG. The telescopic device 7 accommodated in a contracted posture on the outer peripheral surface of the moving device 6 is extended, and the distance to the inner surface of the skin plate 2 is measured by a distance sensor 81 attached to the tip thereof. As the distance sensor 81, an ultrasonic distance sensor, a light wave distance sensor, or the like can be used. As shown in the drawing, the reflected light of the laser irradiated toward the inner surface of the skin plate 2 is read to measure the distance from the distance sensor 81 to the inner surface of the skin plate 2. The expansion device 7 can automatically measure the length of the expansion device 7 and sends the length of the expansion device 7 and the measurement result of the distance sensor 81 to a computer inside the excavator (not shown) to obtain the sum of both. The distance from the axis of the excavator can be obtained.

  FIG. 5 is a view of the arms 71 and 71 and the like constituting the moving device 6 and the telescopic device 7 in FIG. 4 as viewed from the front. The expansion / contraction device 7 is configured by two arms 71 and 71 having arcs having substantially the same diameter as the passage pipe 4 being rotatably attached to the respective end portions. A distance sensor 81 is attached to the end of the other arm 71 and is attached to the moving device 6 so as to be rotatable. The arms 71 and 71 are extended until the distance sensor 81 is separated from the inner surface of the skin plate 2 by a predetermined distance (X direction), and the distance to the inner surface of the skin plate 2 is obtained by the distance sensor 81 (Y direction). In the state where the arms 71 and 71 hold the illustrated posture, when the moving device 6 makes one rotation on the outer periphery of the passage pipe 4 (Z direction), sensing by the distance sensor 81 is continuously performed, The distance over 360 degrees of the skin plate 2, i.e. roundness, is measured.

  After the roundness of the skin plate 2 is measured, as shown in FIG. 6, the skin plate 2 moves backward to the segment ring to which the moving device 6 is assembled (Y direction). Here, as shown in FIGS. 6 and 7, the distance to the inner surface of the segment S is read by the distance sensor 81 (X direction in FIGS. 6 and 7), and the moving device 6 is rotated on the outer periphery of the passage pipe 4. Sensing is performed by the distance sensor 81 (in the Y direction in FIG. 7). At this stage, both the distance of 360 degrees to the inner surface of the skin plate 2 and the distance of 360 degrees to the inner surface of the segment ring are required, so by further subtracting the segment thickness from the difference between the two, A tail clearance T over the direction is calculated. Further, it is possible to simultaneously confirm whether or not there is a deviation (eccentricity) between the axial center of the shield machine 1 (axial center of the skin plate 2) and the axial center of the segment ring. By grasping the eccentricity situation at an early stage, it becomes possible to correct the assembled segment ring or adjust the segment assembly method.

  FIG. 8 is a diagram showing a situation where the moving device 6 is moving to an arbitrary segment ring behind the machine tail (X direction). FIG. 9 is a view of the inside of FIG. 8 as viewed from the front. When the moving device 6 is moved, the arms 71 and 71 are previously retracted to the moving device 6 side and are accommodated on the outer periphery of the moving device 6. The Therefore, when the moving device 6 is moved, there is no risk that the telescopic device 7 interferes with the perfect circle holding device 5 or the like disposed on the outer periphery thereof, and the moving device 6 can freely extend the extending direction of the passage pipe 4. Can be moved to. In addition, although FIG. 9 has seen the perfect circle holding | maintenance apparatus 5 from the front, each edge part of the substantially U-shaped upper half member 51 and the lower half member 52 is connected with the stroke jacks 53 and 53, When the jack extends up and down (X direction), a perfect circle can be maintained by pressing the segment ring radially outward from the inside thereof.

  In FIG. 10, the moving device 6 moves to an arbitrary segment ring position behind the machine tail, the arms 71 and 71 extend as described above, and the distance to the inner surface of the segment S is obtained by the distance sensor 81. The situation is shown (X direction). FIG. 11 shows a situation in which the roundness of the segment ring is measured while the moving device 6 is rotated on the outer periphery of the passage pipe 4 (Y direction) and sensing by the distance sensor 81 is performed. The position of this segment ring is a part where the backfill material a is filled and hardened on the outer periphery, and the earth pressure from the outer peripheral ground acts, as is apparent from FIG. Regardless of the progress status of the shield machine 1, the roundness of the rear segment ring is automatically measured at an arbitrary time point. It can be moved to the segment ring and the roundness can be corrected by the perfect circle holding device.

  FIG. 12 is a diagram showing another embodiment of the measuring means. The telescopic device is composed of the two arms 71 and 71 described above, and a winding device 82 for winding the wire 83 is attached to the end portion thereof. One end of the wire 83 is attached to the moving device 6, and when the winding device 82 comes into contact with the inner surface of the skin plate 2 (or segment S) due to the extension of the telescopic device, the wire 83 is wound up. Tension can be measured. While the moving device is rotated on the outer periphery of the passage pipe 4 (X direction), the extension of the arms 71 and 71 is adjusted so that the winding device 82 contacts the inner surface, and the length of the tensioned wire 83 is adjusted as needed. By measuring, the distance in the circumferential direction is measured.

  FIG. 13 is a view showing still another embodiment of the measuring means. In the illustrated embodiment, the telescopic device is configured in a pantograph shape by connecting the ends of two links 72, 72 connected in an X shape to the ends of other X links 72, 72 having the same configuration. Yes. The distance sensor 81 described above is attached to the end of the pantograph-like expansion / contraction device. By extending the plurality of links 72, 72,..., The distance sensor 81 can be transferred from the inner surface of the skin plate 2 to a predetermined separation position. In this posture, the moving device 6 is rotated once over the outer periphery of the passage pipe 4 (Y direction), whereby the distance to the inner surface of the skin plate can be measured and the roundness can be confirmed. Further, when the moving device 6 moves in the extending direction of the passage piping, the moving device 6 can be freely moved without contracting the perfect circle holding device or the like by contracting the pantograph-like extending device. It can be moved.

  Although illustration is omitted, in the embodiment of FIG. 13, a wire take-up device can be attached to the tip of a pantograph-like telescopic device, and the distance can be measured by the wire length. Further, in any of the embodiments of the telescopic device constituted by a plurality of arms and the pantograph-like telescopic device, the telescopic device is extended so that its tip abuts against the inner surface of the skin plate or the inner surface of the segment, and the telescopic device It is also possible to measure the distance by automatically measuring the length. In this case, a pressure sensor can be provided at the tip of the telescopic device.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention. It is possible to check or measure the roundness of any segment ring that constitutes a segment tunnel extending from the wellhead by rotatably installing the illustrated moving device on an appropriate carriage that moves from the rear of the work passage into the mine. It becomes.

It is a longitudinal section of one embodiment of the shield machine of the present invention, and is a figure explaining the measuring method of the present invention. II-II arrow line view of FIG. (A) is an enlarged view of the _IIIa part of FIG. 1, (b) is an enlarged view of the _IIIb part of FIG. The figure explaining the measuring method of this invention following FIG. The VV arrow directional view of FIG. The figure explaining the measuring method of this invention following FIG. VII-VII arrow line view of FIG. The figure explaining the measuring method of this invention following FIG. IX-IX arrow directional view of FIG. The figure explaining the measuring method of this invention following FIG. XI-XI arrow line view of FIG. Sectional drawing which showed other embodiment of the shield machine of this invention. Sectional drawing which showed other embodiment of the shield machine of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Shield machine, 2 ... Skin plate, 21 ... Machine tail, 22 ... Tail brush 31 ... Face board, 31a ... Cutter bit, 32 ... Partition wall, 33 ... Chamber, 34 ... Injection pipe, 35 ... Mud pipe, 36 ... Shield jack, 37 ... Electa device, 38 ... Frame, 4 ... Pipe for passage, 5 ... Full circle holding device, 51 ... Upper half member, 52 ... Lower half member, 53 ... Stroke jack, 6 ... Moving device, 7 ... Telescopic device, 71 ... arm, 72 ... link, 81 ... distance sensor, 82 ... winding device, 83 ... wire, S ... segment, T ... tail clearance

Claims (8)

A shaft member provided inside the skin plate of the shield machine, extending in the extending direction of the shield machine, and a moving device capable of rotating around the shaft member and movable in the extending direction of the shaft member; And at least a measuring device mounted on the moving device,
The moving device is equipped with a telescopic device that can be stretched from the shaft member toward the skin plate direction, and the measuring device is mounted at the tip of the telescopic device to rotate the shaft around the shaft member. The measuring device is configured to be able to measure the tail clearance between the inner surface of the shield plate and the outer surface of the segment tunnel and / or the inner dimension of the segment tunnel according to the movement of the moving device in the extending direction. A shield machine characterized by   2. The shield machine according to claim 1, wherein the shaft member is a pipe member that internally forms a work passage provided in the center of the shield machine. 3.   The shield machine according to claim 2, wherein the moving member is a ring member provided on an outer periphery of the pipe member. The said expansion-contraction apparatus is comprised so that the several arm which has a circular arc of the same diameter as the said tube member may be attached so that rotation is possible at each edge part . The shield machine described in 1. The telescopic device according to claim 1, characterized in that by connecting the ends of two links connected to X-shape on the end portion of the other X-shaped links having the same configuration are configured to pantograph-like A shield machine according to any one of the above. The shield machine according to any one of claims 1 to 5 , wherein the measuring device comprises a distance sensor. The measuring device comprises a wire take-up device and a wire provided at the tip of the expansion / contraction device. The expansion device is brought into contact with the inner surface of the skin plate or the segment, and the distance is determined by the wire length extending from the inner surface to the shaft member. The shield machine according to any one of claims 1 to 5 , wherein the measurement is performed. A measuring method for measuring a tail clearance between an inner surface of a skin plate of a shield machine and an outer surface of a segment tunnel, and / or an inner dimension of a segment tunnel,
Inside the shield machine, a moving device that is rotatable around a pipe member that constitutes a work passage inside and that can move in the extending direction of the pipe member, a telescopic device mounted on the moving device, A distance sensor provided at the tip of the telescopic device is provided, and the distance to the inner surface is measured by the distance sensor in a posture in which the telescopic device is extended to the vicinity of the inner surface of the skin plate or the inner surface of the segment. By measuring the distance while rotating around the pipe member, the distance to the inner surface is automatically measured in an arbitrary plane, and the moving device is moved in the extending direction of the pipe member while moving in the arbitrary plane. By measuring the distance to the inner surface in the case, automatic measurement of the distance in a plurality of surfaces is performed. Method of measuring instrument tunnel empty size.

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