JP7082370B2 - Centre and how to move Centle - Google Patents

Description

The present invention relates to a technique for moving a centre.

The center is configured to be able to run on a rail installed on the bottom surface of the tunnel by wheels of a trolley provided below the center itself (see, for example, Patent Document 1).
Here, in the tunnel lining work in a steeply sloping tunnel when traveling the center, a winch or the like is used to move the center, and a towing movement method using a wire is adopted.

Japanese Patent No. 6330099

However, when towing with a wire using a winch, the centre runs away when the wire breaks. Further, in the case of towing by wire, although an auxiliary winch, a chill hole, etc. are used together, there is a problem that a foundation or the like that becomes a reaction force is required for each, and it takes a lot of time and effort to move the center.

Further, in the case of towing by a wire, the wire may be broken and the operator may be injured if the wire hits the operator. Therefore, it is not possible to put an operator in the inner angle of the wire, and there is a problem that it is difficult to confirm whether the center body of the center does not come into contact with surrounding objects when the center is moved.

In addition, when towing by wire, the rail on which the center travels needs to be replaced with a work machine such as a backhoe or unic to replace the unnecessary rail member behind the center in front of the center as the center moves. There is a problem that it becomes.

Therefore, the present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a centre and a centre moving method capable of preventing the escape of the centle without being towed by a wire.

In order to solve the above problems, the centle according to one aspect of the present invention is a centle used in the construction of an uphill tunnel, and is provided at the lower part of the center itself so as to be able to travel on a rail mounted on the bottom surface of the tunnel. The chassis, the centre elevating jack provided so that the centle itself can be raised and lowered at the traveling height on the rail by the wheels of the chassis and the separation height above the rail at which the wheels are separated, and the uphill slope. A front clamp jack that can support the chassis from the lower side and can grip and release the rail, and a rear part that can grip and release the rail from the lower side of the uphill 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 part of the center.

Further, in order to solve the above-mentioned problems, the centle moving method according to one aspect of the present invention is a method for moving a centle in an uphill tunnel construction, and the sentle according to one aspect of the present invention is used to move the center up. It is characterized in that the center itself and the rail are alternately moved from a low slope side to a high slope side.

According to the centre according to one aspect of the present invention and the centle moving method using the same, when moving the centle in an uphill tunnel, the operation of gripping and releasing the rail using a plurality of hydraulic jacks and the operation of the center with respect to the center. The push-pull action allows the center itself and the rail to move.
Therefore, according to the present invention, since the movement and posture are controlled by the hydraulic jack, it is possible to surely prevent the escape of the centle regardless of the towing by the wire. Therefore, compared to towing by wire, it is safer to approach the center and the risk of occupational accidents can be reduced.

Further, according to the centle movement method according to one aspect of the present invention, the rail on which the center is traveled can be sequentially moved forward and re-laid only by movement by a plurality of jacks and posture management. Therefore, a heavy machine for moving and laying the rail is not required, and it is possible to eliminate the work of disconnecting the rail behind the center and the work of connecting the rail in front of the center.

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

It is a schematic diagram explaining one embodiment of the centle which concerns on one aspect of this invention, the figure (a) is a side view, and (b) is a plan view. It is a schematic cross-sectional view of the centle shown in FIG. 1, the cross section of the left half of the figure is along the line II in FIG. 1 (a), and the cross section of the right half is FIG. 1 (a). It is along the II-II line of. It is a figure explaining the system configuration of the centre movement apparatus shown in FIG. It is a schematic diagram (state 1) explaining one Embodiment of the centle movement method by a centle which concerns on one aspect of this invention. It is a schematic diagram (state 2) explaining one Embodiment of the centle movement method by a centle which concerns on one aspect of this invention. It is a schematic diagram (state 3) explaining one Embodiment of the centle movement method by a centle which concerns on one aspect of this invention. It is a schematic diagram (state 4) explaining one Embodiment of the centle movement method by a centle which concerns on one aspect of this invention. It is a schematic diagram (state 5) explaining one Embodiment of the centle movement method by a centle which concerns on one aspect of this invention. It is a schematic diagram (state 6) explaining one Embodiment of the centle movement method by a centle which concerns on one aspect of this invention. It is a schematic diagram (state 7) explaining one Embodiment of the centle movement method by a centle 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, ratio, etc. between the thickness and the plane dimension are different from the actual ones, and there are parts where the relationship and ratio of the dimensions are different between the drawings. Further, the embodiments shown below exemplify devices and methods for embodying the technical idea of the present invention, and the technical idea of the present invention describes the material, shape, structure, and arrangement of constituent parts. Etc. are not specified in the following embodiments.

As shown in FIG. 1, the centre 10 of the present embodiment is used in tunnel construction with an upslope (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 configured by connecting a plurality of (four in this embodiment) formwork members 31 to 34 having the same shape with a certain width in the longitudinal direction of the tunnel to each other.

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

As shown in the figure, each formwork member 31 to 34 has an upper foam 41 located at the top, side foam 42 rotatably connected to the lower surfaces of both ends of the upper foam 41 and located on both sides, and sides. It has a lower foam 43 rotatably connected to the lower end of the portion foam 42.

The upper foam 41 is supported by the support beam 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 in the inward and outward directions by the foam jacks 44 to 47 and the like, respectively.

In each formwork member 31 to 34, the upper foam 41 is raised by the extension drive of the foam jacks 44 to 47 and the like, and the side foam 42 and the lower foam 43 are projected outward. As a result, the entire main form 30 is expanded in diameter, and the casting space S is defined.

Further, in each formwork member 31 to 34, the upper foam 41 is lowered by a shortening drive of the foam jacks 44 to 47 and the like, and the side foam 42 and the lower foam 43 are housed inward. As a result, the entire main form 30 is brought into a reduced diameter state, and is separated inward from the inner peripheral wall of the tunnel T.

Here, as shown in FIGS. 1 and 2, the gantry 20 is provided with chassis 23 and 24 at the lower ends of the traveling legs 21 and 22 at the front and rear ends thereof. The chassis 23 and 24 have wheels 23w and 24w mounted on the rail R, and the rail R mounted on the bottom surface of the tunnel is provided at the lower part of the center itself so as to be able to travel as the face progresses. Will be.

Further, as shown in FIGS. 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. Center elevating jacks 27 and 28 are provided at the lower ends of the support legs 25 and 26. The center elevating jacks 27 and 28 can raise and lower the center 10 itself at a traveling height that allows the wheels 23w and 24w of the chassis 23 and 24 to travel on the rail R and a separation height that separates the wheels 23w and 24w above the rail R. It is provided.

In the centre movement method of the present embodiment, the centre movement device includes the chassis 23, 24 and the center elevating jacks 27, 28, and as shown in FIG. 3, the system configuration of the center movement device is dedicated to a total of six units. Use hydraulic jacks (2 + 2 for movement / escape prevention, 2 for escape prevention).

Specifically, the centre 10 of the present embodiment is provided with a control unit 90 for controlling a hydraulic pump at an appropriate position in the gantry 20 as shown in FIG. A plurality of necessary hydraulic devices are connected to the control unit 90 via hydraulic piping.
In the present embodiment, as the above 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. , Is equipped.

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

As shown in FIG. 1, the front clamp jack 50 is provided so that the chassis 24 can be supported from the side having a low uphill slope and the rail R can be gripped and released. The rear clamp jack 60 is provided so that the rail R can be gripped and released from the side having a low uphill slope. Then, the propulsion jack 70 is retractably interposed between the rear clamp jack 60 and the rear portion of the center 10.

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

The propulsion jack 70 is a push-pullable double-acting hydraulic jack, and clevis are attached to both ends in the axial direction. As a result, the combination of the rear clamp jack 60 and the propulsion jack 70 makes it possible to use both the center 10 and the rail R for pushing and pulling.

The interconnection portion between the centre 10 and the front clamp jack 50, the interconnection portion between the centre 10 and the propulsion jack 70, and the interconnection portion between the propulsion jack 70 and the rear clamp jack 60 have a hinge structure, respectively. The play of the interconnection portion absorbs (eliminates) the displacement (distortion or twisting) according to the posture holding of the centre 10 when ascending and descending and the rotation amount of the posture of the moving jack at that time.

The control unit 90 is a hydraulic control unit including a hydraulic pump and a computer, and has an interlock function for preventing the centre 10 from escaping. That is, the control unit 90 has the remaining two rear parts when the front clamp jack 50 or the rear clamp jack 60 is loose (when the rail is not gripped) among the four clamp jacks 50 and 60. Even if the clamp jack 60 or the front clamp jack 50 is loosened (the operation to release the grip of the rail), the hydraulic pressure of the clamp jack is not released, which ensures that the centre is prevented from escaping. Has been done.

Further, the control unit 90 has a function in which the clamp jacks 50 and 60 hold the clamp pressure required for gripping at a predetermined pressure or higher. When each clamp pressure falls below a predetermined pressure, the control unit 90 automatically activates the hydraulic pump to pressurize the clamp pressure required for each of the clamp jacks 50 and 60, and when the pressure reaches the predetermined pressure or higher, the hydraulic pump is turned on again. It is designed to stop.

Next, the operation of the centre 10 and the rail R according to the moving method of the present embodiment will be described with reference to FIGS. 4 to 10 as appropriate. Hereinafter, in the case of remote control, the two remote control devices 80 and 81 are not particularly distinguished, and the first remote control device 80 is simply referred to as a remote control device 80 to explain the operation.

First, a method of moving the rail R will be described.
In the initial state of each part jack, the centle elevating jacks 27 and 28 are in the accommodated state, and the chassis 23 and 24 are in the 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 button of the remote controller 80 to hold the front and rear clamp jacks 50 and 60 in the gripped state of the rail R and support the front and rear chassis 23 and 24. As a result, the front clamp jack 50 is in the gripped state (centre front support state). Further, the rear clamp jack 60 is also in a gripped state (centre rear support state).

Therefore, in the above 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 surely prevented even in the wheel running state. At this time, the propulsion jack 70 is in the extended state. The control unit 90 constantly monitors the state of the pressure oil during operation, and automatically stops the hydraulic pump when the hydraulic pressure rises above a predetermined pressure (for example, 60 MPa).

From the above initial state, as shown in FIG. 4, the operator projects the front and rear center elevating jacks 27 and 28 to support the gantry 20 with respect to the ground (hereinafter, also referred to as “state 1”). In this "state 1", the centre 10 shifts to the 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. Since it is naturally impossible to run in this "state 1", the escape of the center is prevented.

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

In the "state 1", the pressure on the rail R by the weight of the gantry 20 is released, so that the rail R mounted on the ground can move. Since the process of placing the secondary lining concrete itself is based on a well-known method, the description thereof will be omitted.

Then, from the "state 1", the operator operates the remote controller 80 to unclamp the front clamp jack 50 and put the front chassis 24 in a non-supported state as shown in FIG. Also called "state 2"). In this "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.

The control unit 90 has an interlock function in which the rear clamp jack 60 is not unclamped even if the operator accidentally presses the unclamp button of the remote controller 80 when the front clamp jack 50 is in the unclamped state. Since it has, the escape of the centre is surely prevented.

Next, the operator operates the remote controller 80 to shortenly 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”). As a result, the rail R held by the rear clamp jack 60 is pulled forward by a length corresponding to the shortened length of the jack. The reference numeral U shown in the figure indicates an image in which the clamp jacks 50 and 60 are in the unclamped state, and the reference numeral S indicates an image in which the propulsion jack 70 is in the shortened state (hereinafter, the same applies).

Next, a method of moving the center 10 will be described.
After the secondary lining concrete placing process, the operator accommodates the centre elevating jacks 27 and 28 and lowers the gantry 20 (hereinafter, also referred to as “state 4”), as shown in FIG. As a result, the wheels 23w and 24w come into contact with each other on the rail, and the rail R is fixed by being pressed by the weight of the gantry 20. The arrow of the reference numeral N shown in the figure shows an image of accommodating the center elevating jacks 27 and 28, and the arrow of the reference numeral D shown in the figure shows an image in which the center 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 gripped state of the rail R (the center supporting state). Therefore, even if the wheel is running, the escape of the center is surely prevented.

The operator then presses the propulsion switch on 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 centre 10 travels along the rail R and moves forward (hereinafter, also referred to as “state 5”). ).

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

The operator then operates the remote controller 80 and presses the clamp button for the front clamp jack 50. As a result, the control unit 90 activates the hydraulic pump to bring the front clamp jack 50 into a gripped state (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 rises above a predetermined pressure (for example, 60 MPa).

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

The operator then operates the remote controller 80 to push the retract 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”).

As a result, the rear clamp jack 60 itself moves forward along the rail R. The operator then operates the remote controller 80 to re-hold the rear clamp jack 60. Hereinafter, by repeating the above "state 1" to "state 7", the centre 10 and the rail R can be moved from the low side to the high side of the uphill slope.

In this way, the centre 10 of the present embodiment has an operation of gripping and releasing the rail R by using a plurality of clamp jacks 50 and 60 provided in the front and rear in the tunnel T having an uphill slope, and the center elevating jack 27. , 28 to position the wheels 23w and 24w of the chassis 23 and 24 at the traveling height and the separation height, and the push-pull operation with respect to the center 10 due to the expansion and contraction of the propulsion jack 70, so that the side with a low uphill slope The center 10 itself and the rail R can be alternately and continuously and safely moved from the to the higher side.

Next, the action and effect of the moving method of the centre 10 and the rail R of the present embodiment will be described.
In the centre movement method of the present embodiment, as described above, by repeating the states 1 to 7 in order, the center 10 itself and the rail R are alternately moved by a plurality of hydraulic jacks, and the runaway of the center 10 is ensured. Can be prevented. Thereby, according to the centre 10 and the center movement method of the present embodiment, the centerle movement work can be safely performed even in a steep place without being towed by a wire.

Further, in the present embodiment of the center 10 and the method of moving the center, it is possible to maintain the posture on the rail R and its own rail during traveling by using the weight of the center 10 as a reaction force. Therefore, it is not necessary to separately install a reaction force support member such as a foundation, which saves time and effort.

Further, according to the center 10 and the method of moving the center of the present embodiment, the rail R located behind the center can be sent forward along the traveling direction of the center 10. Therefore, it is possible to shorten the advance work of the rail R, the equipment for moving the rail, and the laying process. In addition, it is economical because the number of rail members can be minimized.

It should be noted that the centre movement method according to the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

10 Centle 20 Gantry 21, 22 Running legs 23, 24 Chassis 23w, 24w Wheels 25, 26 Support legs 27, 28 Center elevating jack 30 Main formwork 31-34 Formwork member 35 Support beam 41 Top foam 42 Side foam 43 Lower foam 44-47 Foam jack 50 Front clamp jack 60 Rear clamp jack 70 Propulsion jack 80 Remote controller 90 Control unit R Rail S Casting space

Claims (2)

A centre used in uphill tunnel construction,
The chassis provided at the bottom of the center itself so that it can run on the rails placed on the bottom of the tunnel,
A center elevating jack provided so that the center itself can be raised and lowered at a running height on the rail by the wheels of the chassis and a separation height above the rail at which the wheels are separated.
A front clamp jack provided so that the chassis can be supported from the side having a low uphill slope and the rail can be gripped and released.
A rear clamp jack provided so that the rail can be gripped and released from the lower side of the uphill slope, and the rear clamp jack.
A propulsion jack 70 that is extendably interposed between the rear clamp jack and the rear of the center,
The center is characterized by being equipped with. It is a method of moving the centre in the construction of an uphill tunnel.
A method for moving a centle according to claim 1, wherein the center itself and the rail are alternately moved from a low side to a high side of the uphill slope.

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