JP2021031980A - Tunnel lining construction system and tunnel lining construction method - Google Patents

Abstract

To enable automatic placing in a reinforcement assembly section in addition to automatic placing in an unreinforced section of lining.SOLUTION: A tunnel lining construction system is provided including a placing nozzle 3 that places concrete from a plurality of placing ports 13 provided in a tunnel peripheral direction X2 in an inner peripheral surface 11a of a pit face of a form body 11 positioned on an inner peripheral side of a tunnel wall surface 100 in a lining form 10, a nozzle movement device 5 that moves the placing nozzle 3 in the tunnel peripheral direction X2 and attaches and detaches the placing nozzle 3 to and from the placing port 13, and a control unit 6 that performs control such that the nozzle movement device 5 is moved in the tunnel peripheral direction X2 depending on a status of placing the concrete and selects a predetermined placing port 13 to perform attachment and detachment of the placing nozzle 3.SELECTED DRAWING: Figure 3

Description

The present invention relates to a tunnel lining construction system and a tunnel lining construction method.

Conventionally, a concrete driving device for constructing a tunnel lining by driving concrete into a gap between a tunnel wall surface excavated by the NATM method and a lining formwork is known (see, for example, Patent Document 1). ..
As a concrete driving device, there is a configuration in which a plurality of driving ports are provided in the tunnel circumferential direction in a wife formwork installed on the face side, and the driving nozzles are automatically switched to these multiple driving ports. .. Then, using such a concrete driving device, the driving nozzle is driven while moving in the tunnel circumferential direction and the tunnel axial direction in the space on the face side of the end form.

Japanese Unexamined Patent Publication No. 2018-105029

However, in the conventional concrete driving device as shown in Patent Document 1, the following concrete is placed in the lining section on the face side of the end formwork installed in the concrete driving section at the place where the lining form is arranged. Reinforcing bar assembly sections are formed in which reinforcing bars are assembled in preparation for driving.
That is, there is a problem that the driving nozzle interferes with the reinforcing bar in the reinforcing bar assembly section, which makes it difficult to drive with the concrete driving device. Therefore, even when reinforcing bars are provided in the reinforcing bar assembly section, there is a demand for a concrete driving device capable of automatically moving the driving nozzle in the circumferential direction of the tunnel to drive concrete. There was room for improvement.

The present invention has been made in view of the above-mentioned problems, and is a tunnel lining construction system and a tunnel lining construction method that enable automatic driving in a reinforced reinforced section in addition to automatic driving in an unreinforced section of lining. The purpose is to provide.

In order to achieve the above object, the tunnel lining construction system according to the present invention is a tunnel lining construction system for constructing a tunnel lining by driving concrete into a casting area between a tunnel wall surface and a lining mold. Therefore, among the lining molds, the concrete is driven from a plurality of driving holes provided along the tunnel circumferential direction on the inner peripheral surface of the face side of the mold body located on the inner peripheral side of the tunnel wall surface. A nozzle, a nozzle moving device that moves the driving nozzle in the tunnel circumferential direction and attaches / detaches to / from the driving port, and the nozzle moving device that moves the nozzle moving device in the tunnel circumferential direction according to the concrete driving situation, are predetermined. It is characterized in that it is provided with a control unit that selects the driving port and controls the driving nozzle to be attached / detached.

Further, the tunnel lining construction method according to the present invention is a tunnel lining construction method in which concrete is poured into the casting area between the tunnel wall surface and the lining formwork to construct the tunnel lining, and the tunnel is moved. A step of moving the device in the tunnel circumferential direction, and a plurality of the lining formwork provided along the tunnel circumferential direction on the inner peripheral surface of the formwork body located on the inner peripheral side of the tunnel wall surface on the face side. It has a step of connecting a driving nozzle by driving the nozzle moving device to the driving port of the above, and a step of driving concrete from the driving nozzle into the driving area. It is characterized in that the nozzle moving device is moved in the circumferential direction of the tunnel, a predetermined driving port is selected, and the driving nozzle is controlled to be attached / detached.

In the present invention, concrete can be driven into the driving area by connecting a driving nozzle to a driving port provided on the inner peripheral surface of the formwork body of the lining formwork on the face side. In other words, since the driving port is located on the inner peripheral surface of the formwork body, it is possible to perform driving with the driving nozzle connected to the driving port located on the inner peripheral surface side of the formwork body. In, the driving nozzle is no longer arranged on the face side of the end form of the lining form.
Therefore, in the construction of the reinforcing bar section where the reinforcing bar is provided in the lining concrete, even if the reinforcing bar is assembled on the face side of the end formwork, which is the next concrete driving section, the driving nozzle is inside the formwork body. It can be moved in the tunnel circumferential direction and the tunnel axial direction on the empty side. Therefore, it is possible to efficiently move the driving nozzle together with the nozzle moving device along the tunnel circumferential direction without interfering with the reinforcing bar, so that automatic driving can be performed.

Further, in the tunnel lining construction system according to the present invention, it is preferable that the nozzle moving device is arranged on the face side of the lining form.

In this case, the nozzle moving device can be arranged in the space on the face side of the lining form. Therefore, it is possible to perform parallel work of moving the nozzle moving device to a position in a predetermined tunnel circumferential direction without interfering with the operation of setting and removing the lining form, and it is possible to improve the work efficiency.

Further, in the tunnel lining construction system according to the present invention, a driving pipe extending toward the face side from the lining form is connected to the driving port, and the driving nozzle can be attached to and detached from the driving pipe. It is preferable to be connected.

In this case, by connecting the driving pipes to all of the plurality of driving ports provided at intervals in the tunnel circumferential direction in advance, it is desired to selectively connect the driving nozzles to those driving pipes. Concrete can be driven into the driving area from the driving port.
At this time, since the end of the driving pipe connected to the driving port is located on the face side of the lining formwork, when connecting the driving nozzle to the end of the driving pipe, the driving nozzle is moved in the tunnel axial direction. It is possible to connect without moving in the orthogonal radial direction. Therefore, the preparatory work before concrete driving can be improved, and the accuracy of automation can be improved.

Further, the tunnel lining construction system according to the present invention is characterized in that a guide rail extending along the tunnel circumferential direction is provided, and the nozzle moving device is provided so as to be movable along the guide rail. May be.

In this case, since the nozzle moving device can be moved along the guide rail in the tunnel circumferential direction, the nozzle moving device can be easily positioned, the construction efficiency can be improved, and the automatic driving control can be performed. Can be easily and accurately performed.

According to the tunnel lining construction system and the tunnel lining construction method of the present invention, in addition to the automatic driving of the unreinforced section of the lining, the automatic driving in the reinforcing bar assembly section is possible.

It is a perspective view which looked at the structure of the tunnel lining construction system by embodiment of this invention from the diagonal face side. It is a front view of the tunnel lining construction system shown in FIG. 1 as seen from the face side. It is a side view which showed the state which concrete is driven on the face side of the lining formwork in the tunnel lining construction system shown in FIG. It is a side view which shows the state before connecting the driving nozzle to the driving tube connected to the driving port. It is a top view of the driving pipe and the driving nozzle seen from the air side in the tunnel in the tunnel lining construction system.

Hereinafter, the tunnel lining construction system and the tunnel lining construction method according to the embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the tunnel lining construction system 1 according to the present embodiment automatically drives concrete into the gap between the tunnel wall surface 100 excavated by the NATM method and the lining mold 10 to lay the tunnel. It is a construction system for constructing 101.

The tunnel cross section targeted in the present embodiment is an arch type, and as shown in FIGS. 2 and 3, a lining is constructed on the inner peripheral surface of the arch on the bottom plate 103. Then, the tunnel wall surface 100 on which concrete is cast by the tunnel lining construction system 1 is provided with a support 102 by sprayed concrete, and a waterproof sheet (not shown) is provided over the entire surface.

As the concrete to be cast, for example, medium-fluidity lining concrete having excellent fluidity and no material separation can be used. Here, in the lining formwork 10 in the tunnel lining construction system 1, the face side (also referred to as the gable side) is set as the face portion 10a in the tunnel axial direction X1 which is the axis along the longitudinal direction of the tunnel, and the wellhead side (existing). The lining 101 side and the lap side) are referred to as the wellhead portion 10b.
The lining formwork 10 has an arch shape when viewed from the tunnel axial direction X1. The lining formwork 10 is provided at a predetermined length along the tunnel axial direction X1 and concrete is driven in parallel with excavation at a position behind the face (for example, a position 100 m behind) to construct the lining. .. At this time, the lining formwork 10 is overlapped with the existing lining 101 (see FIG. 1) and set at the place to be driven next, and concrete is poured. That is, the lining is constructed while sequentially replacing the lining formwork 10 on the face side.

The tunnel lining construction system 1 includes a lining formwork 10 that can move in the tunnel traveling direction on the bottom plate 103 of the tunnel, and a driving device 20 that is arranged on the face side of the lining formwork 10 and has a driving nozzle 3. I have.

As shown in FIG. 2, the lining formwork 10 has a formwork body 11 extending in the tunnel circumferential direction X2 so as to face the tunnel wall surface 100 at a constant interval, and the face side of the casting area R. A detachable wife form 12 is provided on the wife portion.

Like the formwork body 11, the end formwork 12 extends in an arch shape along the tunnel circumferential direction X2, and after setting the formwork body 11, is fixed to the face side end portion of the formwork body 11. With the end form 12 fixed to the form body 11, the face side end of the casting area R is held by the end form 12.

The formwork body 11 is supported from the inner peripheral side by a pedestal (not shown) provided with a traveling device capable of self-propelling on the bottom plate 103 of the tunnel, and the casting set posture and the demolding posture are selectively selected with respect to the gantry. It is provided so that it can be taken. On the inner peripheral surface 11a of the face portion 10a of the form main body 11, a plurality of driving ports 13 (11 locations in FIG. 2) to which the driving pipes 15 described later can be connected are provided at intervals in the tunnel peripheral direction X2. There is. The driving port 13 opens toward the air side inside the tunnel, and the air side inside the tunnel and the driving area R communicate with each other. The driving ports 13 are provided in the tunnel circumferential direction X2 at intervals of, for example, 50 cm to 2 m, which is a concrete driving unit.

As shown in FIGS. 4 and 5, the driving port 13 is provided with an opening / closing shutter 14 that opens and closes the driving port 13. The opening / closing shutter 14 is configured such that a rotating shaft 14a is provided on the inner peripheral surface 11a of the form main body 11 and is rotated to the air side inside the tunnel by the expansion / contraction drive of the opening / closing cylinder 14b. The opening / closing shutter 14 is configured so that the driving pipe 15 is detachably connected in the open state and the driving port 13 is closed when the driving pipe 15 is removed after the driving.
The driving port 13 may be provided with a cleaning device (not shown) capable of injecting cleaning water. By providing the cleaning device, it is possible to clean the driving port 13, the driving pipe 15, and the driving nozzle 3 with the cleaning device after the driving nozzle 3 is separated after the driving.

With the open / close shutter 14 open, the driving nozzle 3 is inserted into the driving pipe 15, fixed, and then concrete is driven. When the driving nozzle 3 is pulled out from the driving pipe 15 after the driving at the driving port 13 is completed, the opening / closing cylinder 14b is driven to close the opening / closing shutter 14.

The driving pipe 15 is connected to the driving port 13 and extends from the driving port 13 so as to protrude toward the face side from the end form 12. Specifically, the driving pipe 15 has an inclined portion 15A extending diagonally downward from the driving port 13 toward the face side, and a horizontal portion 15B extending from the inclined portion 15A to the face side in a substantially horizontal direction via the curved portion 15C. It forms a tube. An insertion port 15a to which the driving nozzle 3 is connected is formed at the end of the driving pipe 15 on the face side. The driving pipe 15 is provided in a state of being connected to all the driving ports 13 at the time of driving.

In the present embodiment, the insertion port 15a of the driving pipe 15 is provided so as to be coaxial with the tip portion 3a of the driving nozzle 3 held by the nozzle moving device 5. By providing the insertion port 15a of the driving pipe 15 and the tip portion 3a of the driving nozzle 3 on the coaxial line in this way, when the driving nozzle 3 is connected to the driving pipe 15, it can be attached and detached simply by moving it in the tunnel axial direction X1. can do.

As shown in FIG. 3, a plurality of formwork vibrators (not shown) are provided on the inner peripheral surface 11a of the formwork body 11 at predetermined positions. When the formwork vibrator operates, it vibrates the concrete driven into the casting area R via the formwork main body 11. The formwork vibrators are provided at appropriate positions at intervals along the tunnel circumferential direction X2 and the tunnel axial direction X1 of the formwork body 11.

As shown in FIGS. 2 and 3, the driving device 20 has a driving nozzle 3 that can be attached to and detached from the driving port 13 via a driving pipe 15, and is arranged on the face side of the mold body 11 along the tunnel circumferential direction X2. The extending guide rail 4, the nozzle moving device 5 provided with the driving nozzle 3 and guided by the guide rail 4, and the concrete driving state are detected, and the connection position of the driving nozzle 3 with respect to the plurality of driving ports 13 is switched. It includes a control unit 6 (see FIG. 3).
In this embodiment, two sets of nozzle moving devices 5 equipped with the driving nozzles 3 are provided on the guide rail 4.

The driving nozzle 3 is mounted on the nozzle moving device 5, and the base end portion 3b of the driving nozzle 3 is connected to a movable pipe 30 connected to the concrete pump 31 shown in FIG. The tip portion 3a of the driving nozzle 3 is detachably inserted into the insertion port 15a of the driving pipe 15.

As shown in FIGS. 1 to 3, the movable pipe 30 is an articulated pipe connected by a plurality of joints, and includes a pipe switching device 32. The movable pipe 30 is installed so that the lining formwork 10 is fixed to the lining formwork 10 after being installed at a position where concrete is to be driven in the tunnel axial direction X1. Specifically, one end 30a of the movable pipe 30 is connected to the base end portion 3b of the driving nozzle 3 mounted on the nozzle moving device 5, and the other end 30b is connected to the pipe switching device 32. One movable pipe 30 (30A, 30B) is provided on each of the left and right sides when viewed from the face side.

As shown in FIG. 1, the pipe switching device 32 has a first opening 32a, a second opening 32b, and a third opening 32c. The first opening 32a is connected to a concrete pipe 33 connected to the pump 31. The second opening 32b and the third opening 32c are connected to an end (the other end 30b) opposite to the end (one end 30a) provided with the driving nozzle 3 of one of the movable pipes 30A. , The other end 30b of the other movable pipe 30B is connected.

Based on the control signal from the control unit 6, the pipe switching device 32 switches the concrete taken in from the first opening 32a to either the second opening 32b or the third opening 32c and discharges the concrete. As a result, the concrete pumped by the pump 31 is driven from either the driving nozzle 3 on the one side of the movable pipe 30A or the driving nozzle 3 on the other side of the movable pipe 30B.

The joints of the movable pipe 30 are hydraulically controlled based on the control instructions output from the control unit 6, so that the posture of each joint is controlled. By driving the movable pipe 30, each nozzle moving device 5 moves on the outer peripheral surface of the guide rail 4 along the tunnel circumferential direction X2. As a result, the driving nozzle 3 can move to the vicinity of any of the plurality of driving ports 13 among the plurality of driving ports 13, and it is possible to switch whether to drive concrete.

As shown in FIG. 3, the guide rail 4 is provided along the tunnel circumferential direction X2 on the face side of the form main body 11. The guide rail 4 is fixed and supported on the face side of the gantry that supports the formwork body 11. The guide rail 4 moves the nozzle moving device 5 in the tunnel circumferential direction X2.

Two sets of nozzle moving devices 5 are provided. Therefore, the driving nozzle 3 can be individually moved and arranged together with the nozzle moving device 5 on each of the left and right sides in a cross-sectional view viewed from the tunnel axial direction X1, and the concrete driving work in the left and right driving areas R is performed in parallel. be able to. Further, the nozzle moving device 5 is provided with a front / rear slide portion 51 for attaching / detaching the driving nozzle 3 to / from the insertion port 15a of the driving pipe 15. The front-rear slide portion 51 moves the driving nozzle 3 so as to extend in the tunnel axial direction X1 (front-rear direction) of the driving nozzle moving device 5.

The control unit 6 includes a sensor 61 (see FIG. 1) for detecting the concrete placing state, a receiving unit 62 (see FIG. 3) for acquiring the detection result of the sensor 61, and a display unit 63 (see FIG. 3) for displaying the received information. It has an operation unit 64 (see FIG. 3) and an operation unit 64 (see FIG. 3).

The sensor 61 is provided at an appropriate position on the tunnel wall surface 100, the lining formwork 10, and the like, and measures, for example, the driving state of concrete to be driven. The driving conditions measured by the sensor 61 include, for example, the surface height of concrete, the lateral pressure on the side surface of the formwork body 11, the temperature and pressure at each part of the formwork body 11 and the formwork 12, acceleration, and the like. As the sensor 61, a concrete sensor, an acceleration sensor, a pressure temperature sensor, or the like that detects whether or not the sensor has come into contact with concrete can be adopted.

Next, the operation and excavation method of the tunnel lining construction system and the tunnel lining construction method described above will be described in detail with reference to the drawings.
First, as shown in FIGS. 2 and 3, the formwork body 11 of the lining formwork 10 is moved to a position in the tunnel axial direction X1 where concrete is to be driven and arranged. Next, the end form 12 is fixed to the end of the form body 11 on the face side. Then, each driving port 13 provided on the inner peripheral surface 11a of the formwork main body 11 of the lining form 10 is opened by the opening / closing shutter 14, and the driving pipe 15 is connected to all the driving ports 13.

Subsequently, the driving device 20 and the movable pipes 30A and 30B are installed on the lining formwork 10. That is, one end 30a of the movable pipe 30 is connected to the base end portion 3b of the driving nozzle 3 of the nozzle moving device 5 on the guide rail 4. As a result, the concrete supplied from the pressure feed pump 31 can be supplied to the pipe switching device 32. Here, at the start of driving, the front-rear sliding portion 51 of the nozzle moving device 5 is advanced to insert the tip portion 3a of the driving nozzle 3 into the insertion port 15a of the driving pipe 15 of the left and right driving ports 13 located at the lowermost position. To connect.

Then, the worker inputs an instruction to start driving from the operation panel. When the control unit 6 detects that the driving start instruction has been input to the operation unit 64, the control unit 6 starts the driving process. As a result, the driving nozzle 3 is instructed to be inserted into the predetermined driving port 13, the nozzle moving device 5 moves the driving nozzle 3 toward the wellhead side in the tunnel axial direction X1, and the driving nozzle 3 drives. It is inserted into the tube 15 and connected.

Next, when the driving nozzle 3 is connected to the driving pipe 15, concrete is driven. Here, by driving while switching to the left and right of the lining formwork 10 by the pipe switching device 32 according to the height of the surface of the concrete to be driven, from the lower end to the top of the casting area R. Drive up to the part. During casting, the concrete is vibrated by the above-mentioned formwork vibrator according to the concrete driving condition, and the concrete is compacted by this.

The driving port 13 is switched when the concrete surface reaches the upper driving port 13.
The driving port 13 to be driven with concrete closes the opening / closing shutter 14 of the driving port 13 currently being driven when the surface of the driving concrete reaches the driving port 13 one above the driving port 13. .. Then, the driving nozzle 3 is moved to the driving port 13 one level above and moved along the guide rail 4, then the opening / closing shutter 14 is opened, and the driving nozzle 3 is inserted into the driving pipe 15 and fixed. Make a switch.

The concrete driving described above is performed from the lower end to the top of the lining formwork 10. When the concrete has been cast on the top, the concrete has been cast. After that, after a predetermined curing time has elapsed, the lining formwork 10 is removed, and the lining formwork 10 and the driving device 20 are moved forward (toward the face side) in the tunnel axial direction X1 and then next. The lining formwork 10 is moved to the position to be driven and set, and concrete is driven by the same procedure as described above.

Next, the operation of the tunnel lining construction system and the tunnel lining construction method described above will be described in detail with reference to the drawings.
In the present embodiment, as shown in FIGS. 2 and 3, the driving nozzle 3 is connected to the driving hole 13 provided on the inner peripheral surface 11a on the face side of the form main body 11 of the lining form 10 to connect concrete. It can be driven into the driving area R. That is, since the driving port 13 is located on the inner peripheral surface 11a of the formwork body 11, the driving nozzle 3 connected to the driving port 13 is arranged on the inner peripheral surface 11a side of the formwork body 11 for driving. This can be done, and the driving nozzle 3 is not arranged on the face side of the end form 12 of the lining form 10 at the time of driving.

Therefore, in the construction of the reinforcing bar section in which the reinforcing bar is provided in the lining concrete, even if the reinforcing bar is assembled on the face side of the end formwork 12, which is the next concrete driving section, the driving nozzle 3 is used as the formwork main body. It can be moved in the tunnel circumferential direction X2 and the tunnel axial direction X1 on the inner air side of 11. Therefore, it is possible to efficiently move the driving nozzle 3 together with the nozzle moving device 5 along the tunnel circumferential direction without interfering with the reinforcing bar, so that automatic driving can be performed.

Further, in the present embodiment, since the nozzle moving device 5 can be arranged in the space on the face side of the lining form 10, the nozzle moving device 5 can be moved without interfering with the operation of setting and removing the lining form 10. Parallel work can be performed to move the tunnel to a predetermined position in the circumferential direction X2, and work efficiency can be improved.

Further, in the present embodiment, by connecting the driving pipes 15 to all of the plurality of driving ports 13 provided at intervals in the tunnel circumferential direction X2 in advance, the driving nozzles are selectively connected to the driving pipes 15. 3 can be connected and concrete can be driven into the driving area R from the desired driving port 13.
At this time, since the end portion (insertion port 15a) of the driving pipe 15 connected to the driving port 13 is located on the face side of the lining mold 10, the driving nozzle 3 is connected to the insertion port 15a of the driving pipe 15. At that time, the driving nozzle 3 can be connected without moving in the radial direction orthogonal to the tunnel axial direction X1. Therefore, the preparatory work before concrete driving can be improved, and the accuracy of automation can be improved.

Further, in the present embodiment, the guide rail 4 extending along the tunnel circumferential direction X2 is provided, and the nozzle moving device 5 can be moved in the tunnel circumferential direction X2 along the guide rail 4. As a result, the positioning of the nozzle moving device 5 can be facilitated, the efficiency of construction can be improved, and the automatic control of driving can be easily and accurately performed.

As described above, in the tunnel lining construction system and the tunnel lining construction method according to the present embodiment, in addition to the automatic driving of the unreinforced section of the lining, the automatic driving in the reinforcing bar assembly section is possible.

Although the embodiment of the tunnel lining construction system and the tunnel lining construction method according to the present invention has been described above, the present invention is not limited to the above embodiment and can be appropriately changed as long as the purpose is not deviated. Is.

For example, in the present embodiment, the guide rail 4 and the nozzle moving device 5 of the driving device 20 are arranged on the face side of the lining formwork 10, but the position is not limited to this. For example, it may be arranged on the inner air side of the lining formwork 10. When the lining formwork 10 is arranged on the inner air side in this way, it is necessary to move the driving nozzle 3 in the radial direction orthogonal to the tunnel axial direction.

Further, in the present embodiment, the driving pipe 15 extending toward the face side from the lining form is connected to the driving port 13, but the driving pipe 15 may be omitted.

Further, in the present embodiment, the guide rail 4 is provided along the tunnel circumferential direction, but the present invention is not limited to providing such a guide rail 4. In short, any mechanism may be used as long as the nozzle moving device 5 can be moved to a predetermined position in the tunnel circumferential direction and positioned.

Furthermore, the position and quantity of the driving port 13 can be set as appropriate. In addition, the shape, size, quantity, etc. of the lining form 10 (form body 11, end form 12), opening / closing shutter 14, driving nozzle 3, guide rail 4, and nozzle moving device 5 are also the cross-sectional shape of the tunnel. , Can be set as appropriate according to the size. Further, the configuration of the control unit 6, for example, the type, position, quantity, etc. of the sensor 61 can be appropriately determined.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention.

1 Tunnel lining construction system 3 Drive-in nozzle 4 Guide rail 5 Nozzle movement device 6 Control unit 10 Backing formwork 11 Formwork body 11a Inner peripheral surface 12 Wife mold 13 Drive-in port 14 Open / close shutter 15 Drive-in pipe 15a Insertion port 20 Drive-in Equipment 30, 30A, 30B Movable piping 32 Piping switching device 51 Front and rear slide part 100 Tunnel wall surface R Casting area X1 Tunnel axial direction X2 Tunnel circumferential direction

Claims (5)

A tunnel lining construction system that constructs tunnel lining by driving concrete into the casting area between the tunnel wall surface and the lining formwork.
Among the lining formwork, a driving nozzle for driving the concrete from a plurality of driving holes provided along the tunnel circumferential direction on the inner peripheral surface of the formwork body located on the inner peripheral side of the tunnel wall surface on the face side.
A nozzle moving device that moves the driving nozzle in the circumferential direction of the tunnel and attaches / detaches the driving nozzle to / from the driving port.
A control unit that moves the nozzle moving device in the tunnel circumferential direction according to the concrete driving situation, selects a predetermined driving port, and controls the driving nozzle to be attached / detached.
A tunnel lining construction system characterized by being equipped with. The tunnel lining construction system according to claim 1, wherein the nozzle moving device is arranged on the face side of the lining form. A driving pipe extending toward the face side from the lining form is connected to the driving port.
The tunnel lining construction system according to claim 1, wherein the driving nozzle is detachably connected to the driving pipe. A guide rail extending along the tunnel circumference is provided,
The tunnel lining construction system according to any one of claims 1 to 3, wherein the nozzle moving device is provided so as to be movable along the guide rail. This is a tunnel lining construction method in which concrete is poured into the casting area between the tunnel wall surface and the lining formwork to construct the tunnel lining.
The process of moving the nozzle moving device in the circumferential direction of the tunnel, and
The nozzle moving device is driven to a plurality of driving ports provided along the tunnel circumferential direction on the inner peripheral surface of the lining form on the face side of the form body located on the inner peripheral side of the tunnel wall surface. The process of connecting the driving nozzle by doing
The process of driving concrete from the driving nozzle into the driving area,
Have,
A tunnel lining construction method characterized in that the nozzle moving device is moved in the tunnel circumferential direction according to the concrete driving situation, a predetermined driving port is selected, and the driving nozzle is controlled to be attached / detached. ..

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