JP2020056255A - Center and center travel method - Google Patents

Abstract

To prevent the center from escaping, regardless of the wire pulling.SOLUTION: A center 10 comprises undercarriages 23 and 24, which are used in a construction of an uphill tunnel and are provided at a bottom of the center itself so that it can travel on a rail R placed on the bottom of the tunnel, center lifting jacks 27 and 28 provided so as to be capable of raising and lowering the center itself at a traveling height at which wheels 23w and 24w of the undercarriages 23 and 24 travel on the rail R and at a separation height at which the wheels 23w and 24w are spaced above the rail, front clamp jacks 50 and 50 provided so as to be able to support the undercarriage 24 from the side with a low uphill slope and to grasp and release the rail R, rear clamp jacks 60 and 60 provided so that the rail R can be grasped and released from the side with a low uphill slope, and propulsion jacks 70 and 70 which are interposed between the rear clamp jacks 60 and 60 and the center rear portion so as to extend and contract.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a technique for moving a center.

The centur is configured to be able to travel on rails installed on the bottom surface of the tunnel by wheels of a bogie provided at a lower part of the centur itself (for example, see Patent Document 1).
Here, when traveling the center, in a tunnel lining work in a steep slope tunnel, a winch or the like is used to move the center, and a tow moving method using a wire is adopted.

Japanese Patent No. 6330099

  However, in pulling by a wire using a winch, if the wire breaks, the sentre will escape. Further, in the case of pulling with a wire, although an auxiliary winch or chill hole is used in combination, a foundation or the like serving as a reaction force is required for each, and there is a problem that much trouble is required for moving the sentence.

  In addition, in the case of towing with a wire, the wire may be broken and may be injured if the worker hits the wire. For this reason, a worker cannot enter the inner corner of the wire, and there is a problem that it is difficult to check whether or not the centrifugal body comes into contact with peripheral objects when moving the centrifuge.

  Also, when pulling by wire, it is necessary to replace the unnecessary rail members behind the center with the working machine such as backhoe or unic in front of the center, using a working machine such as a backhoe or Unic as the center moves. There is a problem that becomes.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a sentence and a sentence moving method which can prevent the escape of the sentence without being pulled by a wire.

  In order to solve the above-described problem, a sentry according to one embodiment of the present invention is a sentry used in uphill tunnel construction, and is provided below a sentry itself so as to be able to run on a rail placed on the bottom surface of the tunnel. A chassis, a centre lifting jack provided so as to be able to raise and lower the centre itself at a travel height of traveling on the rails with the wheels of the chassis and at a separation height above the rails where the wheels are separated, and A front clamp jack provided so as to support the chassis from a lower side and to be able to grip and release the rail, and a rear part provided to be able to grip and release the rail from the lower side of the upward slope. It is characterized by comprising a clamp jack, and a propulsion jack that is extendably interposed between the rear clamp jack and the rear of the center. To.

  Further, in order to solve the above-mentioned problem, a centur moving method according to an aspect of the present invention is a method of moving a sentry in tunnel construction on an upward slope, and using the centur according to an aspect of the present invention, The center and the rail are alternately moved from a low gradient side to a high gradient side.

ADVANTAGE OF THE INVENTION According to the sentence which concerns on one aspect of this invention, and the sentence moving method using the same, when moving a sentence in a tunnel of an upslope, the operation | movement of the grip of rail and release | release of it using several hydraulic jacks, with respect to sentence By the push-pull operation, the center itself and the rail can be moved.
Therefore, according to the present invention, since the movement and the posture are managed by the hydraulic jack, the escape of the sentre can be surely prevented irrespective of the traction by the wire. Therefore, it is safer to approach the center and the risk of occurrence of occupational accidents can be reduced as compared with pulling by wire.

  Further, according to the sentence moving method according to one embodiment of the present invention, the rail for running the sentence can be sequentially moved forward and re-laid only by movement and posture management by a plurality of jacks. For this reason, a heavy equipment for rail moving work for moving and laying the rail is not required, and the work of separating the rail behind the center and connecting the rail in front of the center can be eliminated.

  As described above, according to the present invention, it is possible to prevent the escape of the sentre, regardless of the traction by the wire.

1A and 1B are schematic diagrams illustrating an embodiment of a sentence according to one embodiment of the present invention, in which FIG. 1A is a side view and FIG. 1B is a plan view. FIG. 2 is a schematic cross-sectional view of the centre shown in FIG. 1, in which a left half section is taken along a line II in FIG. 1A, and a right half section is shown in FIG. Along the line II-II. FIG. 2 is a diagram illustrating a system configuration of the centre moving device illustrated in FIG. 1. FIG. 4 is a schematic diagram (state 1) illustrating an embodiment of a sentence moving method using a sentence according to one embodiment of the present invention. FIG. 4 is a schematic diagram (state 2) illustrating an embodiment of a sentence moving method using a sentence according to an aspect of the present invention. FIG. 4 is a schematic diagram (state 3) illustrating an embodiment of a sentence moving method using a sentence according to one embodiment of the present invention. FIG. 4 is a schematic diagram (state 4) illustrating an embodiment of a sentence moving method using a sentence according to one embodiment of the present invention. FIG. 7 is a schematic diagram (state 5) illustrating an embodiment of a sentence moving method using a sentence according to an aspect of the present invention. FIG. 9 is a schematic diagram (state 6) illustrating an embodiment of a sentence moving method using a sentence according to an aspect of the present invention. It is a schematic diagram (state 7) explaining one Embodiment of the sentence moving method by the sentence which concerns on one aspect of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. The drawings are schematic. Therefore, it should be noted that the relationship between the thickness and the planar dimension, the ratio, and the like are different from the actual ones, and the drawings include portions having different dimensional relationships and ratios. The embodiments described below exemplify an apparatus and a method for embodying the technical idea of the present invention, and the technical idea of the present invention is based on the material, shape, structure, and arrangement of the component parts. Are not specified in the following embodiments.

  As shown in FIG. 1, the centur 10 of the present embodiment is used in tunnel construction with an ascending slope (inclination angle θ with respect to a horizontal plane). The center 10 includes a gate-shaped gantry 20 and a main formwork 30 having an arched front view. The main formwork 30 is formed by connecting a plurality of (four in the present embodiment) formwork members 31 to 34 of the same shape having a constant width in the longitudinal direction of the tunnel.

  As shown in FIG. 2, the main formwork 30 is disposed so as to cover the upper side of the gantry 20, and has a certain length in the longitudinal direction of the tunnel. A casting space S for injecting the secondary lining concrete is defined between the outer peripheral wall of the main formwork 30 and the inner wall of the tunnel T (the inner wall of the primary lining concrete).

  As shown in the figure, each of the form members 31 to 34 includes an upper foam 41 located at the top, side foams 42 pivotally connected to lower surfaces at both ends of the upper foam 41 and located at both sides, A lower form 43 rotatably connected to a lower end of the part form 42.

  The upper form 41 is supported by the support beams 35. A plurality of support beams 35 are provided on the top of the gantry 20 in the front-rear direction and are supported by jacks (not shown) so as to be able to move up and down. The side foam 42 and the lower foam 43 are rotatably connected to the gantry 20 inward and outward by foam jacks 44 to 47 and the like, respectively.

  In each of the mold members 31 to 34, the upper foam 41 is raised by the extension driving of the foam jacks 44 to 47 and the like, and the side foam 42 and the lower foam 43 project outward. As a result, the entire diameter of the main formwork 30 is expanded, and the casting space S is defined.

  Further, in each of the form members 31 to 34, the upper foam 41 is lowered by the shortening drive of the foam jacks 44 to 47 and the like, and the side foam 42 and the lower foam 43 are accommodated inside. Accordingly, the entire main formwork 30 is reduced in diameter, and is separated from the inner peripheral wall of the tunnel T inward.

  Here, as shown in FIGS. 1 and 2, the gantry 20 is provided with chassis 23, 24 at the lower ends of the running legs 21, 22 at the front and rear ends. The undercarriages 23 and 24 have wheels 23w and 24w mounted on the rails R, and are provided on the rails R mounted on the bottom of the tunnel so as to be able to travel as the cutting face advances, below the center itself. Can be

  1 and 2, the gantry 20 has a plurality of support legs 25 and 26 at appropriate positions in the front-rear direction of the gantry 20. At the lower ends of the support legs 25, 26, there are provided centrifugal lifting jacks 27, 28. The centr elevating jacks 27 and 28 can move the centr 10 itself up and down to a traveling height at which the wheels 23w and 24w of the chassis 23 and 24 can travel on the rail R and a separation height at which the wheels 23w and 24w are spaced above the rail R. Is provided.

  In the method of moving a sentence according to the present embodiment, the chassis 23 and 24 and the jacks 27 and 28 for lifting and lowering the sentence are included as the sentence moving devices. As shown in FIG. Hydraulic jacks (2 + 2 for movement / runaway prevention, 2 for runaway prevention) are used.

More specifically, as shown in FIG. 3, the center 10 of the present embodiment includes a control unit 90 for controlling a hydraulic pump at an appropriate position of the gantry 20. A plurality of necessary hydraulic devices are connected to the control unit 90 via hydraulic piping.
In the present embodiment, as the six hydraulic jacks, as shown in FIGS. 1 and 3, a pair of left and right front clamp jacks 50, a pair of left and right rear clamp jacks 60, and a pair of left and right propulsion jacks 70 are provided. , Is provided.

  Further, a remote controller 80 is connected to the control unit 90 via a signal line. In the example shown in FIG. 3, a state is shown in which two first remote controllers 80 and a second remote controller 81 are connected. Each remote controller is provided with a switch corresponding to the above-mentioned six hydraulic jacks, and the corresponding hydraulic jack can be driven by an operator operating the corresponding switch.

  As shown in FIG. 1, the front clamp jack 50 is provided so as to be able to support the chassis 24 from a side having a low ascending slope and to be able to grip and release the rail R. The rear clamp jack 60 is provided so as to be able to grip and release the rail R from the side having a low ascending gradient. The propulsion jack 70 is interposed between the rear clamp jack 60 and the rear of the center 10 so as to be able to expand and contract.

  The front clamp jack 50 and the rear clamp jack 60 have a built-in fixing device capable of holding the rail R between a not-shown seat and a clamp fitting. The reaction force can be obtained by holding the rail R between the seat and the clamp. The front clamp jack 50 is used as a so-called regret clamp, and obtains a reaction force by clamping the rail R and supports the front chassis 24 to prevent the center 10 from running away.

  The propulsion jack 70 is a double-acting hydraulic jack that can be pushed and pulled, and has clevises attached to both ends in the axial direction. Thus, the combination of the rear clamp jack 60 and the propulsion jack 70 can be used for both pushing and pulling of the center 10 and the rail R.

  In addition, the interconnection between the center 10 and the front clamp jack 50, the interconnection between the center 10 and the propulsion jack 70, and the interconnection between the propulsion jack 70 and the rear clamp jack 60 have a hinge structure. The play of the interconnecting portion absorbs (eliminates) a displacement (distortion or twisting) corresponding to the amount of rotation of the attitude of the moving jack at the time of maintaining the attitude of the centrifuge 10 at the time of elevating and lowering.

  The control unit 90 is a hydraulic control unit configured to include a hydraulic pump and a computer, and has an interlock function for preventing the center 10 from running away. That is, when the front clamp jack 50 or the rear clamp jack 60 of the four clamp jacks 50 and 60 is loosened (when the rail is not gripped), the control unit 90 controls the remaining two rear jacks. Even if the operation of loosening the clamp jack 60 or the front clamp jack 50 (the operation of releasing the gripping of the rail) is configured so that the hydraulic pressure of the clamp jack does not come off, the center can be surely prevented from escaping. Have been.

  Further, the control unit 90 has a function in which each of the clamp jacks 50 and 60 holds a clamp pressure necessary for gripping at a predetermined pressure or more. The control unit 90 automatically starts the hydraulic pump when each of the clamp pressures falls below the predetermined pressure, pressurizes the clamp pressure required for each of the clamp jacks 50 and 60, and when the pressure reaches or exceeds the predetermined pressure, turns on the hydraulic pump again. It is designed to stop.

  Next, the operation according to the method of moving the center 10 and the rail R of the present embodiment will be described with reference to FIGS. Hereinafter, in remote control, the operation will be described with the first remote controller 80 simply referred to as the remote controller 80 without distinction between the two remote controllers 80 and 81.

First, a method of moving the rail R will be described.
In the initial state of the jacks of each part, the centrifugal lifting jacks 27 and 28 are in the housed state, and the chassis 23 and 24 are at a low position (running height). Therefore, the center 10 is in a state where it can travel by the wheels 23w and 24w.
The operator operates the clamp buttons of the remote controller 80 to hold the front and rear clamp jacks 50 and 60 on the rail R so as to bring the front and rear chassis 23 and 24 into a supporting state. As a result, the front clamp jack 50 is brought into a gripping state (central front supporting state). The rear clamp jack 60 is also in a gripping state (central rear supporting state).

  Therefore, in the initial state, since the front and rear clamp jacks 50 and 60 are both in the rail gripping state, the escape of the centre is reliably prevented even in the wheel running state. At this time, the propulsion jack 70 is in an extended state. During operation, the control unit 90 constantly monitors the state of the hydraulic oil, and automatically stops the hydraulic pump when the hydraulic pressure increases to a predetermined pressure (for example, 60 MPa) or more.

  From the initial state, as shown in FIG. 4, the operator projects the front and rear centre lifting jacks 27 and 28 to support the gantry 20 on the ground (hereinafter, also referred to as “state 1”). In this “state 1”, the center 10 shifts to a normal secondary lining concrete placing process. In the “state 1”, the chassis 23 and 24 are in a wheel-separated state in which the wheels 23w and 24w float above the rail R. In this "state 1", the running of the center is naturally prevented, so that the escape of the sentence is prevented.

  In addition, the arrow of the symbol P shown in the figure shows the image in which the centrifugal lifting jacks 27 and 28 are overhanging, and the arrow of the symbol U shown in the figure shows the image in which the centur 10 is raised and located at the separation height. Is shown. In addition, reference numeral C shown in the figure indicates an image in which the clamp jacks 50 and 60 are in a clamped state, and reference numeral E indicates an image in which the propulsion jack 70 is in an extended state (the same applies hereinafter).

  In the “state 1”, the pressing of the gantry 20 against the rail R due to its own weight is released, so that the rail R placed on the ground can move. The step of placing the secondary lining concrete is performed by a well-known construction method, and thus the description is omitted.

  Next, from “state 1”, the operator operates the remote controller 80 to unclamp the front clamp jack 50 to bring the front chassis 24 into a non-supporting state as shown in FIG. "State 2"). In the “state 2”, when the front clamp jack 50 is unclamped, the control unit 90 automatically starts the hydraulic pump. The control unit 90 constantly monitors the clamp pressure, and automatically stops the hydraulic pump when the clamp pressure of the front clamp jack 50 becomes zero.

  When the front clamp jack 50 is in the unclamped state, the control unit 90 has an interlock function in which the rear clamp jack 60 is not unclamped even if the operator presses the unclamping button of the remote controller 80 by mistake. As a result, the escape of the center is reliably prevented.

  Next, the operator operates the remote controller 80 to shorten and drive the propulsion jack 70 provided at the rear of the gantry 20, as shown in FIG. 6 (hereinafter, also referred to as “state 3”). Accordingly, the rail R held by the rear clamp jack 60 is pulled forward by a length corresponding to the shortened length of the jack and moves forward. In addition, the code | symbol U shown in the figure shows the image in which the clamp jacks 50 and 60 are in an unclamped state, and the code | symbol S has shown the image in which the jack 70 for propulsion is in a shortened state (the following, the same).

Next, a method of moving the center 10 will be described.
After the secondary lining concrete placing step, the operator accommodates the centrifugal lifting jacks 27 and 28 and lowers the gantry 20, as shown in FIG. 7 (hereinafter, also referred to as “state 4”). As a result, the wheels 23w and 24w abut on the rail, and the rail R is fixed by being pressed by the weight of the gantry 20 by its own weight. In addition, the arrow of the symbol N shown in the figure shows an image of accommodating the centrifugal lifting jacks 27 and 28, and the arrow of the symbol D shown in the same figure shows an image in which the centre 10 is lowered and located at the traveling height. Is shown.

  The chassis 23 and 24 are in a running state with the wheels 23w and 24w mounted on the rail R. At this time, the rear clamp jack 60 is in the gripping state of the rail R (central rear support state). Therefore, even when the vehicle is in the wheel running state, the escape of the sentre is reliably prevented.

  Next, the operator presses the propulsion switch of the remote controller 80. As a result, as shown in FIG. 8, the propulsion jack 70 extends by using the rear clamp jack 60 as a reaction force, and the center 10 travels along the rail R and moves forward (hereinafter, also referred to as “state 5”). ).

  Here, the control unit 90 is configured to make the discharge speed of the pressure oil to the two right and left propulsion jacks the same, whereby the two right and left propulsion jacks 70 have a mutual propulsion reaction force. Even if they are different, the extension speed of the left and right jacks is the same. The control unit 90 automatically stops the hydraulic pump after the propulsion jack 70 extends and completes extension to the stroke end.

  Next, the operator operates the remote controller 80 and presses the clamp button for the front clamp jack 50. Accordingly, the control unit 90 activates the hydraulic pump, and brings the front clamp jack 50 into a gripping state as shown in FIG. 9 (hereinafter, also referred to as “state 6”). The control unit 90 automatically stops the hydraulic pump when the hydraulic pressure of the front clamp jack 50 increases to a predetermined pressure (for example, 60 MPa) or more.

  Next, the operator operates the remote controller 80 and presses the unclamping button for the rear clamp jack 60. As a result, the control unit 90 automatically starts the hydraulic pump, and the rear clamp jack 60 is unclamped. The control unit 90 automatically stops the hydraulic pump when the clamp pressure becomes zero.

  Next, the operator operates the remote controller 80 and presses the backward switch of the propulsion jack 70. As a result, the control unit 90 automatically starts the hydraulic pump, and as shown in FIG. 10, the propulsion jack 70 shortens the jack stroke (hereinafter, also referred to as “state 7”).

  Thereby, the rear clamp jack 60 itself moves forward along the rail R. Next, the operator operates the remote controller 80 to bring the rear clamp jack 60 into the gripping state again. Hereinafter, by repeating the above “State 1” to “State 7”, the center 10 and the rail R can be moved from the lower side of the upward gradient to the higher side.

  As described above, the centr 10 according to the present embodiment includes the operation of gripping and releasing the rail R using the clamp jacks 50 and 60 provided at the front and rear in the uphill tunnel T, and the centr elevating jack 27. , 28, the combination of the operation of positioning the wheels 23w, 24w of the chassis 23, 24 at the traveling height and the separation height and the operation of pushing and pulling the centre 10 due to the expansion and contraction of the propulsion jack 70, , The center 10 itself and the rail R can be moved continuously and safely toward the higher side.

Next, the operation and effect of the moving method of the center 10 and the rail R of the present embodiment will be described.
In the centre moving method according to the present embodiment, as described above, the states 1 to 7 are sequentially repeated so that the centur 10 itself and the rail R are alternately moved by a plurality of hydraulic jacks, and the escape of the centur 10 is ensured. Can be prevented. Thus, according to the sentence 10 and the sentence moving method of the present embodiment, even in a steep place, the sentence moving operation can be safely performed without relying on the pulling by the wire.

  In addition, in the present embodiment, the center 10 and the method of moving the center can maintain the attitude of the rail R and its own position on the rail at the time of traveling using the own weight of the center 10 as a reaction force. Therefore, it is not necessary to separately install a reaction force supporting member such as a foundation, and the labor can be saved.

  Further, according to the sentence 10 and the sentence moving method of the present embodiment, the rail R located behind the sentence can be sent forward along the traveling direction of the sentence 10. For this reason, the equipment for moving the rail R forward and moving the rail, and the laying process can be shortened. Further, the number of rail members can be minimized, which is economical.

  It should be noted that the method of moving a sentence according to the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

10 centre 20 Gantry 21, 22 Travel leg 23, 24 Chassis 23w, 24w Wheel 25, 26 Support leg 27, 28 Centr elevating jack 30 Main form 31-34 Form member 35 Support beam 41 Upper form 42 Side form 43 Lower Form 44-47 Form Jack 50 Front Clamp Jack 60 Rear Clamp Jack 70 Jack for Propulsion 80 Remote Controller 90 Control Unit R Rail S Installation Space

Claims (2)

A centur used in uphill tunnel construction,
An undercarriage provided at the bottom of the center itself so that it can run on rails placed on the bottom of the tunnel
A centre lifting jack provided so as to be able to raise and lower the centre itself at a travel height of traveling on the rails with wheels of the chassis and at a separation height above the rails where the wheels are separated,
A front clamp jack provided so as to be able to support the undercarriage from the lower side of the ascending slope and to be able to grip and release the rail,
A rear clamp jack provided so as to be able to grip and release the rail from the lower side of the upward slope,
A propulsion jack 70 that is extendably interposed between the rear clamp jack and the center rear,
A centur, comprising: A method of moving a center in an uphill tunnel construction,
A method of moving a sentence, wherein the sentence itself and the rail are alternately moved from the lower side of the upward gradient to the higher side using the centre according to claim 1.

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