JPH01158200A - Method of constructing lining - Google Patents

Abstract

PURPOSE: To allow efficient construction by forming a concrete placing space by a movable formwork device, an end-stopping means, a natural ground, and lining, injecting concrete mortar into this concrete placing space, and simultaneously moving the movable formwork device. CONSTITUTION: A movable formwork device 11 is pressed onto a natural ground 30 side in a form where reaction is removed from an already constructed lining 32 portion. A concrete placing space 35 is formed among this movable formwork device 11, an end-stopping means 17c, the constructed lining 32, and the natural ground 30. Concrete mortar 36 is injected and set into this concrete placing space 35, simultaneously the movable formwork device 11 is moved toward a tunnel top end, and the lining 32 is continuously constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for constructing a tunnel lining that can be formed without using shoring.

(b), Conventional technology Traditionally, tunnel lining construction involves concrete and concrete on the ground between the supports installed at predetermined intervals in the direction of the tunnel's excavation.
This is done by spraying or pouring mortar (herein, "concrete mortar" means "concrete" or "mortar". The same applies hereinafter).

(C) 0 Problems to be solved by the invention However, when there is a shoring, it becomes difficult for concrete and mortar to move between the shoring and the ground, unless construction is carried out with sufficient care. However, it has the disadvantage that it is difficult to construct an appropriate lining.

In addition, steel materials such as H-beams are usually used for shoring, but it takes a lot of time and effort to transport such steel materials to the tunnel construction site and bend them to fit the cross section of the tunnel. I need.

In view of the above-mentioned circumstances, the present invention aims to provide a method for constructing a tunnel lining that can construct a tunnel lining without using shoring.

(d) Means for solving the zero problem, that is, the present invention provides a method for moving the movable formwork device (11) to the lining (32).
The movable formwork device (11) is provided with end stop means (17c) on the face side, such as the right side in Figure 2, of the movable formwork device (11), and the lining (32) ), the movable formwork device (11) is moved to the ground (30) in such a way that the reaction force is taken from the already constructed lining (32).
A concrete casting space (35) is formed between the movable formwork device (11), the end stop means (17C), the constructed lining (32) and the ground (30), and the concrete Concrete mortar (
The movable formwork device (11) is moved toward the top of the tunnel while pouring and casting the lining (32) without using shoring. Ru.

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. The following r (el
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, the present invention can be applied to an already constructed lining (
A concrete casting space (35) is formed from the movable formwork device (11), the end stop means (17c), the ground (30) and the lining (32) in such a way that the reaction force is taken from the concrete Concrete mortar (36) in the pouring space (35)
) while moving the formwork device (11) and placing the lining (3).
2).

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a front view showing an example of a tunnel lining construction site to which an embodiment of the lining construction method according to the present invention is applied, and FIG. 2 is a side view of FIG. 1.

As shown in FIG. 1, the lining construction device 1 has a machine body 2, and rollers 2a12a are attached to both sides of the machine body 2 from ζ, and the machine body 2 is moved through the crawlers 2a, 2a. It can move freely in the directions of arrows A and B in Figure 2. A turntable 5 is provided on the fuselage 2 so as to be rotatable in a horizontal plane around the center CTI, and a slide plate 7 is provided on the turntable 5 so as to be movable on the turntable 5 in the directions of arrows A and B. Supported. A drive cylinder 9 is provided between the turntable 5 and the slide plate 7, and by driving the drive cylinder 9 to project the rod 9a in the directions of arrows A and B, the slide plate 7 is moved in the direction of arrows AXB. I can do it. Four guide tubes 7a are provided upright on the slide plate 7, and a guide rail 3 formed in a substantially semicircular shape is attached to each guide tube 7a. The guide tube 3a is provided in a manner that it is slidably fitted and engaged with the guide tube 3a in the directions of arrows C and D. Guide tube 7a
, 3a, an elevating cylinder 6 is provided with one end pivotally connected to a slide plate 7, and a rod 6a of the elevating cylinder 6 can be freely driven to protrude in the directions of arrows C and D inside guide cylinders 7a and 3a. It is set in. The tip of the rod 6a is pivotally attached to the guide rail 3, and by driving the lifting cylinder 6 to project and retreat the rod 6a in the directions of arrows C and D, the guide rail 3 is moved in the directions of arrows C and D into the guide tube. It can be raised and lowered using 7a and 3a as guides.

The guide rail 3 has two parallel rail bodies 10 formed in a substantially semicircular shape, and auxiliary rails 10a, 10a are provided at both ends of each rail body 10 in the direction of arrow E.
, is attached so that it can be folded freely in the F direction. A movable formwork device 11 is supported on the guide rail 3 so as to be able to run freely on the rail main body 10 and the auxiliary rail 10a, and the movable formwork device 11 has a cart 12 that runs on the guide rail 3. . A plurality of wheels 12a are rotatably supported on the truck 12, and the wheels 12a support the truck 12 so as to be movable along the guide rail 3 in the directions of arrows G and H.

The frame 13 is attached to the trolley 12 via the pins 12b and 112b shown by the arrows 1. The frame 13 is rotatably supported in the J direction, and the frame 13 is provided with two pairs of guide tubes 13a. A pressure roller 15.16 is attached to each pair of guide cylinders 13a, and each pressure roller 15.16 has an arm 17, respectively. A pair of guide tubes 17a are attached to the arm 17, and the guide tubes 17a are slidably engaged with the aforementioned guide tube 13a in the axial direction of the guide tube 13a. A coil spring 19 is compressed between the guide tubes 13a and 117a, and the arm 17 is always urged in the direction of arrow C by the coil spring 19.

Each arm 17 has a bracket 17b and a shaft 17c.
Moreover, a plate spring 22 is provided between each bracket 17b, 17b and the arm 17, and the plate spring 22 causes each bracket 17b, 1
7b is elastically supported by arm 17. A roller 2 is provided at the tip of each bracket 17b and arm 17.
0.20.20 are rotatably supported, and an endless suppression belt 21 is wound between these rollers 20.20.20. Further, the arm 17 extends further to the right in FIG. 2 from the portion where the roller 20 is attached, and a guide wheel 23 is rotatably supported at the extended portion. Furthermore, a weir plate 17c made of a flexible material such as rubber is provided on the left side of the arm 17 in FIG. 2, that is, on the tunnel face side.
C has a bent key-shaped cross section. By the way, between the parts of the frame 13 where the pressing rollers 15 and 16 are attached, as shown in FIG. It is provided in such a way that it protrudes to the same level as the side of the frame.
3 is provided with a sheet feeding device 26.26 for feeding edge cutting sheets 27 to each pressure roller 15.16. In addition, the number 33 is a concrete supply hose for supplying concrete mortar to the concrete supply pipe 25.

Further, the tunnel 29 in which the lining is constructed is formed by excavating the ground 30 into a substantially semicircular shape, as shown in FIG.

Since the lining construction device 1 and the like have the above configuration, the tunnel 29 is excavated using the lining construction device 1.
When constructing a lining 32 of a predetermined thickness in the tunnel 29, the lining installation device 1 is installed in the center of the tunnel 29 with a crawler 2a.
, 2a. Until then, the lining construction device 1 is placed in a standby position in the tunnel, for example, on the left side of FIG. To,
It is in a stored state where it is bent outward with respect to the rail body 10, that is, in the direction of arrow E. Furthermore, in the stored state,
The rod 6a of the lifting cylinder 6 is in a retracted state, and therefore the guide rail 3 is also in a lowered state in the direction of the arrow. Furthermore, the turntable 5 is in a 90° rotation state about the center CTI, and therefore, the guide rail 3 has a circular plane formed by the guide rail 3 in the excavation direction of the tunnel 29, as shown by the imaginary line in FIG. That is, it is in a standby state where it is positioned parallel to the directions of arrows A and B.

From such a standby state, move the lining installation device 1 to the center of the cross section of the tunnel 29 as described above, and rotate the turntable 5 by 90 degrees in a horizontal plane to create a circular shape formed by the guide rail 3. from a standby state in which the plane of the plane is positioned parallel to the excavation direction of the tunnel 29, that is, in the directions of arrows A and B, to an operating state in which the plane is positioned perpendicular to the excavation direction of the tunnel 29, as shown in FIG. Move. In this state, the drive cylinder 9 is then driven to appropriately move the slide plate 7 in the direction of arrow A1B relative to the turntable 5, and the pressure belt 21 of the movable formwork device 11 installed on the guide rail 3 is The parts on which the lining is to be constructed are placed opposite each other as shown in Figure 2.

In this state, the lifting cylinder 6 is driven to project the rod 6a in the direction of arrow C, and the guide rail 3 is raised together with the movable formwork device 11 in the direction of arrow C via the guide tubes 7a and 3'a. When the guide rail 3 has risen by a predetermined distance in the QC direction, the auxiliary rails 10a, 10a are expanded in the direction of arrow F, and the auxiliary rail 10, which has been folded up to that point, is expanded.
a, 10a and the rail body 10, as shown in FIG.
Connect in a continuous arc. Next, in this state, move the movable formwork device 11 along the guide rail 3 in the direction of the arrow H, and move the movable formwork device 11 as shown by the imaginary line in FIG.
1 is positioned at the lower end of the tunnel 29 on the right side in the figure.

Next, the movable formwork device 11 is pressed in the direction of the earth 30 using a drive jack (not shown) or the like, and the pressing roller 15 is pressed.
The right end of the arm 16 in FIG.
A concrete placing space 35 is formed by the weir plate 17C1 press roller 15.16, the constructed lining end face 32a and the ground 30. At this time, the guide wheels 23 of the movable formwork device 11 and the right end portions of the rollers 20 constituting the pressure rollers 15 and 15 in FIG. Pushing in the direction of mountain 30 takes a reaction force against the force. By doing this, the second
The contact pressure between the weir plate 17C on the left side of the figure and the ground 30 is controlled by the weir plate 1 that is flexible and has the bending part 17d of the weir plate 17c in contact with the pressure belt 21? c can be maintained at a level that does not significantly deform.

In this state, concrete mortar 36 to which a quick-setting agent has been added is supplied from the concrete supply pipe 25 into the concrete placement space 35 via the concrete supply hose 33. Then, the supplied concrete mortar 36
is injected into the concrete placement space 35 from below in FIG. 1, filling the concrete placement space 35, and rapidly solidifies. Therefore, the mobile formwork device 11 is
At the top of the figure, the pressure belt 21.2 of the pressure roller 15.16 is shown.
1 is gradually moved in the direction of arrow G along the guide rail 3 and therefore along the ground 30 in close contact with the constructed lining 32. Then, the pressure rollers 15 and 16 are pressed against the pressure belt 2.
1 and the lining 32 are in close contact with each other, and the tip 17 of the weir plate 17a
e and the ground 30 are in contact with each other, and the press belt 21 and the lining 32 move without relative movement, and after the press roller 16 shown in the lower part of FIG. 1 has passed, the concrete/mortar 36 A solidified lining 32 is constructed. In this way, the movable formwork device 11 is moved along the guide rail 3 on the constructed lining 32 in the direction of arrow G toward the top of the tunnel. Since a new concrete placement space 35 is continuously formed between the ground and the ground 30, concrete and mortar are supplied to the newly formed concrete placement space 35 via the concrete supply pipe 25. , the lining 32 is continuously formed toward the top of the tunnel.

In addition, when the movable formwork device 11 moves toward the top of the tunnel along the constructed lining 32, the movable formwork device 11 moves toward the right end of the guide wheels 23 and rollers 20 in FIG. However, it moves by taking reaction force from the lining 32 that has already been constructed. Therefore, the weir plate 17c is not excessively pressed in the direction of the earth 30, and the movement of the movable formwork device 11 in the direction of arrow G prevents the poured concrete and mortar 36 from leaking to the outside. 17c, it is carried out smoothly while being prevented.

In this way, the movable formwork device 11 is moved along the guide rail 3 to the top of the tunnel as shown by the solid line in Figure 1, and the concrete and mortar placement in the right half of the figure is completed, and the lining is completed. 32 is constructed, the supply of concrete and mortar to the concrete placement space 35 via the concrete supply pipe 25 is stopped. Next, the movable formwork device 11 is positioned at the lower left end of the tunnel along the guide rail 3, and in that state, as described above, the lining end face 32
a. A concrete placement space 35 is formed between the movable formwork device 11, the weir plate 17c, and the ground 30. Next, while further injecting concrete mortar into the concrete placement space 35, the movable formwork RA11 is moved in the direction of arrow G to construct the lining 32 on the left half of the figure, and as a result, the entire cross section is A lining 32 is constructed over the width L1.

In this way, when the construction of the lining 32 for the predetermined width L1 is completed, the lifting cylinder 6 is driven to move the rod 6a backward in the direction of the arrow, the guide rail 3 is lowered in the direction D, and in this state, the aircraft 2 in the direction of the arrow through the crawlers 2a, 2a, the movable formwork device 11 and the lining 32 still adjacent to the part where the lining 32 was constructed immediately before.
The construction of a new lining 32 is started by facing the ground 30 on which no new lining has been constructed.

In this way, when the lining 32 of a predetermined length has been constructed in the directions of arrows A and B, if it becomes necessary to allow vehicles to pass between the face and the tunnel entrance, the lining construction device 1 is Evacuate from the lining construction position to the standby position. This operation is performed in the following steps.

First, the movable formwork device 11 is positioned at the upper end of the guide rail 3 as shown in FIG.
0a and 10a in the direction of arrow E, and
0 Fold outward. Next, the lifting cylinder 6 is driven to lower the rod 6a in the direction of the arrow. Then, the rail main body 10 with the auxiliary rail 10m folded down descends in the direction of the arrow, and its lower end is moved to a position close to the ground 37. Therefore, the turntable 5 is driven, the slide plate 7 and the guide rail 3 are moved.
and rotate by 900 degrees together with the movable formwork device 11 and the like.

Then, the guide rail 3 and the movable formwork device 11 move to the second
As shown in the imaginary line in the figure, the guide rail 3 is in a standby state positioned parallel to arrows A and B directions. Therefore, crawler 2a.

By moving the fuselage 2 to the left side of the tunnel via 2a, as shown in FIG. 1, the space on the right side of the lining construction device 1 in FIG. It becomes possible for vehicles etc. to pass by.

(g) 0 Effects of the Invention As described above, according to the present invention, the movable formwork device 11 is provided movably along the ground 30 on which the lining 32 is to be constructed, and the movable formwork device 11, a necessary stopping means such as a weir plate 17c is provided on the face side such as the right side in Figure 2, and the lining 3
1. When constructing 2. The movable formwork device 11 is pressed against the ground 30 side by taking reaction force from the already constructed lining 32 portion, and the movable formwork device 11, end stop means, already constructed lining 32 and the ground 30 are pressed together. Concrete pouring space 3 between
5, and while injecting concrete and mortar 36 into the concrete placement space 35, the movable formwork device is moved toward the top of the tunnel, and the lining 32 is constructed without using shoring. Since it is configured to be constructed continuously, it is possible to construct the lining 32 without providing any shoring, and the concrete/mortar 36 and the ground 30 can be placed in all parts of the ground 30 without being disturbed by the shoring. The concrete can be poured in a well-adhered form without any damage, making it easy to improve the reliability of construction.

In addition, since shoring is not required, there is no need to transport steel materials such as H-beams used for constructing shoring to the construction site of the lining, or to bend them, making it possible to construct an economical lining. becomes.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a tunnel lining construction site to which an embodiment of the lining construction method according to the present invention is applied, and FIG. 2 is a side view of FIG. 1. 11...Movable formwork device 17c...End stop means (weir plate) 29...
・Tunnel 30...Mound 32...Lining 35...Concrete placement space 36...
・Concrete/mortar applicant Mitsui Construction Co., Ltd. agent Patent attorney Phase 1) Shinji (and 2 others)

Claims (1)

[Scope of Claims] A movable formwork device is provided so as to be movable along the ground on which the lining is to be constructed, and an end stop means is provided on the face side of the movable formwork device, and when constructing the lining, The movable formwork device is pressed against the ground side by taking a reaction force from the already constructed lining part, and a concrete pouring space is created between the movable formwork device, the end stop means, and the constructed lining and the ground. The movable formwork device is moved toward the top of the tunnel while injecting and placing concrete and mortar in the concrete placement space, and the lining is continuously constructed without using shoring. A method of constructing a lining constructed in this manner.