JPH0676759B2 - Lining device for shield machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lining device for a shield machine, and particularly for a lining machine incorporated in a shield machine used when the ground is composed of relatively hard rock or the like. Regarding the device.

(Prior Art) Shield excavators are generally used for excavation of ground with a lot of groundwater or soft ground, but in recent years it has also been used to avoid the risk of partial skin loss in rocky areas. There are cases.

In this case, the blasting method is often used for the lining of the excavated tunnel, but the lining work by this blasting method is performed with a shield in order to prevent deterioration of the work environment due to dust during spraying. It is performed at a position distant from the main body rearward, or is stopped after excavation and is performed in the vicinity of the shield main body, following the excavation.

(Problems to be solved by the invention) However, when the lining work is performed at a position away from the shield body, the ground between the excavation position and the lining position may not be protected, and skin may be removed. And the safety of construction is impaired. Further, when the lining work is performed near the shield main body, the excavation work and the lining work are separated, so that there is a problem that the work period as a whole becomes long.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a lining apparatus for a shield machine, which is safe in construction and does not lead to a long construction period.

(Means for Solving Problems) According to the present invention for achieving the above object, a rotating member that rotates in a circumferential direction is supported on an inner peripheral surface of a tail portion of a shield body, and the rotating member supports the rear portion of the tail portion. The machine frame of the formwork device projecting to the above is connected through a connecting member, and this machine frame is provided with a drive roller and a driven roller which are rotated by the drive member, and the drive roller and the driven roller are endless. The belt form is wrapped around the belt form, and the front end of the belt form is in contact with the guide end plate provided on the inner peripheral surface of the tail portion behind the rotating member, and the rear end is in contact with the existing lining wall. It is movable between the end plate and the existing lining wall and the non-operation position that is separated inward in the radial direction of the tail portion.When this belt formwork is in the operation position, there is a gap between it and the natural ground. A supply member that supplies the lining material is installed. It is characterized by being removed.

(Operation) During the lining work, the formwork member is brought to the operation position, and the lining material is supplied from the supply member to the gap between the formwork member and the ground. The rotating member rotates at a speed corresponding to the hardening speed of the lining material, and the formwork apparatus including the formwork member moves in the circumferential direction of the tunnel accordingly to form the lining wall.

(Example) An example shown in the drawings will be described below.

As shown mainly in FIGS. 1 to 3, 1 is a tail portion of the shield body, and a plurality of support rollers 2 are provided on the inner peripheral surface of the shield body at intervals in the circumferential direction. 3 are supported. The pinion 5 of the drive motor 6 meshes with the large gear 4 provided on the rotary ring 3, and the rotary ring 3 is rotated by the drive motor 6.

One end of a link 8 and an operating cylinder 9 are pivotally attached to a mounting portion 7 provided on the rotary ring 3, and the other ends of these members 8 and 9 are pivotally attached to a support base 11 of a swivel device 10. The machine frame 16 of the formwork device 15 is rotatably supported on the support base 11 about an axis A (see FIG. 2), and the machine frame 16 is driven by a drive motor 12 to a pinion.
It is designed to rotate via 13 and a large gear 14.
A large number of driven rollers 18 are supported on the machine frame 16 via pneumatically actuated cylinders 17 connected to both ends of the machine frame 16, and a belt form 20 is wound around these driven rollers 18 and drive rollers 19a to form a belt form 20. Is driven by a drive motor 19. Reference numeral 21 denotes a pneumatic cylinder for applying tension to the belt form 20.

An operating cylinder 23 is provided on an arm 22 provided on both sides of the machine frame 16, and a top end form 24 is supported on the operating rod.
A nozzle 26 for supplying concrete projects to the outside through a slit 25 provided in the top end form 24, and the nozzle 26 includes a drive motor 27, a drive sprocket 28 and a driven sprocket 29.
By the chain 30 traveling by (see FIG. 3),
FIG. 1 is adapted to reciprocate in the direction of the arrow.

A guide gable plate is provided on the inner peripheral surface of the tail portion 1 behind the rotating ring 3.
31 is provided, the formwork device 15 has an operating position where the front end of the belt formwork 20 comes into contact with the guide end plate 31 and the rear end of the belt formwork 20 comes into contact with the existing lining wall 38 by the operating cylinder 9, and the belt formwork. 20 moves between the guide end plate 31 and the existing lining wall 38 and a non-operating position that is separated inward in the radial direction of the tail portion 1. Reference numeral 32 denotes a metal packing, and an air injecting tube packing may be used instead of this.

Next, the manner of use of the above will be described.

1 and 2 show that the tail portion 1 is moved forward to form a lining space between the existing lining wall 38 and the tail portion 1, and the reinforcing bar 33 and the temporary fastening form 35 are arranged. At this time, the front end of the shield body is being excavated.

The working cylinder 9 brings the formwork device 15 to the non-operating position, and in this state the rotating ring 3 is rotated to move the formwork device 15 to the lower position of the tunnel. Then the working cylinder 9
To bring the formwork device 15 into the operating position, and the belt formwork 20
In the gap 34 between the ground and the ground surface, concrete is poured from the supply nozzle 26 while moving it in the direction of the arrow in FIG.
Let it harden.

As shown in FIGS. 3 and 4, the rotating ring 3 is rotated at a speed corresponding to the hardening rate of concrete, that is, the formwork device 15
Is moved in the circumferential direction of the tunnel to the vicinity of the top end by a half turn, thereby forming a lining wall 36 for almost a half turn. When the formwork device 15 is moved, the formwork belt 20 is run to facilitate concrete separation.

After forming the lining wall 36 for almost half circumference as described above,
Bring the formwork device 15 to the non-operating position, move it again to the lower position of the tunnel, and operate the turning device 10 to move the formwork device.
Turn 15 180 degrees. Then remove the temporary fixing form 35,
Bringing the formwork device 15 back to the operating position and pouring and curing the concrete, as shown in FIG.
15 is moved in the opposite direction to form the lining wall 37 which is almost the other half.

After the lining walls 36 and 37 are formed, as shown in FIG.
The concrete is placed in the space 39 between the walls 36, 37 by abutting against the walls 36, 37, and one cycle of the lining work is completed. On this occasion,
Since the shutter (not shown) closes the slit 25 following the reciprocating movement of the supply nozzle 26, the poured concrete does not leak from the slit 25.

As described above, according to the present invention, the inner peripheral surface of the tail portion of the shield body supports the rotating member that rotates in the circumferential direction,
A machine frame of a formwork device projecting to the rear of the tail portion is connected to the rotary member via a connecting member, and a drive roller and a driven roller rotated by the drive member are provided in the machine frame. An endless belt form is wound around the roller and the driven roller, and the front end of the belt form is a guide end plate provided on the inner peripheral surface of the rear end of the tail part behind the rotating member, and the rear end part is already installed. It is possible to move between the operation position where it comes into contact with the lining wall and the non-operation position where it is separated from the guide gable plate and the existing lining wall inward in the radial direction of the tail portion. In the case of, the supply member that supplies the lining material is provided in the gap between the ground and the ground, so that the lining wall can be formed immediately behind the shield body, and the skin can be removed after passing through the shield body. Etc. are prevented,
Moreover, this lining wall can be easily formed by an operator on the ground operating the formwork device, and does not cause deterioration of the working environment as in the case of conventional sprayed concrete, In addition, since the belt form is moved by the drive roller and the driven roller during movement of the form device, peeling from concrete is smoothly performed,
Further, since the inner surface of the rear part of the shield body is not contaminated with concrete and the excavation work and the lining work can be performed at the same time, there is an effect that the entire construction period can be shortened.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a sectional view in the axial direction of the tunnel at the time of starting the lining work, Fig. 2 is a sectional view in the tunnel circumferential direction of the same as above, and Fig. 3 is a lining work state for half a circumference. FIG. 4 is a circumferential sectional view showing the same as above, FIG. 5 is a circumferential sectional view showing a lining work state for the remaining half circumference, and FIG. 6 is a lining work state at the top. FIG. 1 ... Tail part, 2 ... Support roller 3 ... Rotating ring (rotating member) 8 ... Link (connecting member) 9 ... Operating cylinder (connecting member) 10 ... Revolving device, 15 ... Formwork device 16 …… Machine frame, 18 …… Drive roller 19a …… Driving roller 20 …… Belt form (form frame member) 24 …… Top end form 26 …… Supply nozzle (supply member) 31 …… Guide end plate, 34… … Voids 36,37 …… lining wall, 38 …… existing lining wall

Claims (1)

[Claims] 1. A shield main body supports a rotating member that rotates in a circumferential direction on an inner peripheral surface of a tail portion, and connects the rotating member with a machine frame of a formwork device protruding rearward of the tail portion through a connecting member. However, the machine frame is provided with a drive roller and a driven roller which are rotated by a drive member, and an endless belt form is wound around these drive roller and the driven roller,
This belt form has an operation position where the front end abuts on the inner wall of the rear end of the tail behind the rotating member, the rear end abuts the existing lining wall, and the guide end plate and the existing lining. It is movable between the wall and the non-operated position that is separated from the wall inward in the radial direction.When the belt form is in the operated position, the lining material is supplied to the gap between the ground and the ground. A lining device in a shield machine, characterized by being provided with a supply member.