JPH0230899A - Mobile formwork for tunnel lining - Google Patents

Abstract

PURPOSE:To make operations easier as well as enable a movable type formwork to be used even for secondary and third covering works by a method in which the constitutional parts of formwork are moved along rails set on the upper part of struts erected at an interval in the widthwise and lengthwise directions of tunnel. CONSTITUTION:Rails 12 and 12' are set in a vertically movable manner on the upsides of struts 7 erected at an interval in the widthwise and lengthwise directions of tunnel. The constitutional parts such as top frame 14, curved frame 18, flexible face plate 21, winder 26, and jack arm 22 for a movable type formwork are movably set along the rails 12 and 12' through rollers 15 and 16. The constitutional parts are assembled on a desired place for covering work and then moved to the next place along the rails 12 and 12' thereafter. The number of movable parts can thus be reduced to permit them to move manually, and also interference with cables in moving can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a movable formwork for secondary or tertiary lining of tunnels.

[Conventional technology]

A steel movable formwork is used to cast concrete for the secondary or tertiary lining of tunnels, and Figure 6 shows the formwork called a travel form, which has one rail on the bottom.
A mount 2 rolls on this rail 1. A curved frame 4 having substantially the same shape as the curvature of the tunnel is suspended from the left and right sides of the telescopic column 3 above the frame 2 on hinges, and a formwork face plate 5 is integrally stretched on the outer surface of the frame 4. .

Then, the formwork is centered by supporting the lower part of the frame 4 with the jack arm 6 from the frame 2.

On the other hand, in order to move, if the jacking arms 6 are shortened and the frames 4 are closed so that they are close to each other, and the support columns 3 are further shortened, the formwork face plate 5 will be separated from the concrete surface and a gap will be created between them. , and move the front of the formwork forward along rail l.

In addition to this travel form, there are also formworks called centor form and needle beam (not shown), but all of them are suspended from a movable frame and supported by some kind of support means such as an arm. It has a structure that allows

[Problem that the invention seeks to solve]

In the conventional movable formwork, the frame supporting the formwork must be moved together, and the weight makes it difficult to move it manually. Furthermore, since the pedestal is located in the center and moves together with the pedestal, it cannot be used when cables are already installed in the tunnel, and cannot be used as a tertiary winding form.

The purpose of the present invention is to eliminate the disadvantages of the conventional example, and because the movable part is lightweight, it can be easily moved by hand, and it can be used not only as a secondary winding form but also as a tertiary winding form for existing cables. To provide a movable formwork for tunnel lining, which can be moved while protecting the tunnel and can be easily re-cented.

[Means for Solving the Problems] In order to achieve the above object, the present invention has rails that are arranged in the tunnel width direction and erected at appropriate intervals in the tunnel length direction, and have rails extending in the tunnel length direction on the upper and lower sides. A column that is movable, a top frame with a face plate that can be slid by a roller that engages with the rail between the columns that are lined up in the width direction, and a top frame that is suspended from a hinge from the roller that also engages with the rail and is divided. A curved frame consisting of a combination of bodies, a blind-shaped flexible face plate whose upper end is locked to the upper end of the curved frame and stretched along the outside of the curved frame, a column, and a jack arm interposed between the curved frame. , and a winding device for the blind-shaped flexible face plate attached to the inside of the curved frame.

[Effect]

According to the present invention, in order to move the formwork, the curved frame and the jacking arms between the columns are shortened and then removed.
Then, the rails provided on the pillars are lowered, and the front end segments of the curved frames are removed to shorten the frames and bring them close to each other, thereby removing the mold.

In this case, the tip of the flexible face plate can be pulled inward by winding the end of the curved frame with a winding device.

Then, the curved frame to which the top frame and the flexible face plate are attached is slid in the longitudinal direction of the tunnel by the action of rollers to move forward.

In addition, to set the advanced formwork, release the tension on the tip of the flexible face plate, attach the jacking arm to support the curved frame in an expanded state, and connect the divided body to the tip of the frame. , further raise the rail and place the top frame, its face plate, the curved frame, and the flexible face plate in the set position.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a front view showing one embodiment of the movable formwork for tunnel lining according to the present invention, and shows the state when the formwork is set as a 13th winding formwork.

Reference numeral 7 in the figure is a support that stands in the tunnel, and consists of a jack base 7a, a main body 7b on the top that can be added, and a threaded part 7c on the top.The jack base 7a is fixed to the bottom of the tunnel with an anchor, and the threaded part 7c The upper tip is engaged as a projection 7d with a column mounting block 8 attached to the tunnel ceiling. Further, the threaded portion 7c constitutes a screw jack, and 9' in Fig. 0, which is combined with the screw ring 9, is provided on the jack base 7a and is attached to the main body 7b.
It is a screw ring that moves up and down.

Two of the pillars 7 are lined up in the width direction within the tunnel, and are erected at appropriate intervals in the length direction of the tunnel, and the pillars 7 that are aligned next to each other are connected to the horizontal members 11. ll' and 11'', and a rack 10 for storing cables (electrical, telephone cables, etc. to be passed through the tunnel) is housed inside the frame, thereby providing so-called cable protection.

In the figure, reference numerals 12 and 12' denote C-shaped channel-shaped rails with openings on the sides, and a pair of left and right rails are mounted on the elevating ring 13 fitted to the support 7 with the support 7 sandwiched therebetween. This rail 12 extends in the length direction of the tunnel, and is installed between the lifting rings 13 of the pillars 1, the side opening is in the opposite direction to the pillar 7, and the threaded ring 9 is located directly below the lifting ring 13. is engaged.

In the figure, 14 is a horizontal top frame with a face plate 14b among the formwork frames, and a roller 15 is provided at the left and right ends of the frame with mounting members 14a projecting downward, and the roller 15 is inserted into the rail through the opening. It was able to roll within 12'.

Further, 16 in the figure is a roller that is accommodated in the other rail 12 through an opening so that it can roll, and the supporting member 17 provided with this roller 16 has divided bodies 18a, 18b, 18.
The upper end of the curved frame 18 formed by the combination C is connected to the hinge by a pin 19.

Note that this support member 1 is placed directly under the projection 7d at the upper end of the support column 7.
7 is the mounting member 14a of the roller 15 of the top frame 14.
A spacer 20 that can be inserted between the two is provided.

The spacer 20 is an elongated member arranged along the length of the tunnel in the same way as the rails 12, 12'.

In the figure, reference numeral 21 is the face plate of the formwork, and as shown in FIG.
i' A blind-shaped flexible face plate sewn vertically, the upper end of which is fixed to the support member 17 and placed on the outer surface of the curved frame 18. The material of the spacer 21b may be synthetic resin or metal. Furthermore, a release sheet 27 may be provided on the surface of the face plate 21 if necessary.

Of the curved frame 18, the central divided body 18b and the support column 7
The jack arm 22 is removably attached to the main body 7b with bolts, pins, etc., and a support frame 23 is attached to the lower divided body 18c facing downward, and there are holes between the support frames 23 on the left and right. A screw type jack 24 can be interposed therebetween. 25 in the figure is a roller provided at the lower part of the main body 7b of the support 7, and as described later, the curved frame 1
It supports the tip of 8.

Further, a winding device 26 using a winch is provided inside the central divided body 18b of the curved frame 18, so that the winding device 26 can wind up the tip of the wire 21c of the flexible face plate 21.

Next, how to use it will be explained. .

First, let us explain the case of setting the formwork. As mentioned earlier, the pillars 7 are erected, and the rails 12.1
The top frame 14 and the curved frame 18 are connected via 2'.

If the threaded ring 9 is rotated and raised along the threaded portion 7c, the elevating ring 13 and the rail 12.12' will rise,
The top frame 14 and the curved frame 18 also rise. A spacer 20 is provided between the support member 17 and the mounting member 14a.
is inserted, and the top frame 14. The curved frame 18 is integrated.

Further, the curved frame 18 includes divided bodies 18a, 18b,
18c are combined, the lower end is in contact with the bottom of the tunnel by the support frame 23, and the support frame 23 is connected to the jack 2.
Fixed at 4. Furthermore, the divided body 18 of the curved frame 18
b and the main body 7b of the support 7 with a pin or bolt to support the entire curved frame 18.

This jack arm 22 can have a board placed on it to form a walkway.

A blind-shaped flexible face plate 21 is provided on the outside of the curved frame 18.
A release sheet 27 is stretched as necessary, and further,
Since the top frame 14 has a face plate 14b, concrete can be placed on the outside thereof.

On the other hand, in order to demold the formwork, as shown in FIG. The wire 21c is attached to the winding device 26 attached to the wire 18b.
Attach the tip of the

Then, when the threaded ring 9 is rotated in the opposite direction and lowered along the threaded portion 7c, the elevating ring 13 and the rail 12.12' are also lowered, and the top frame 14 and the rail 12.12' are lowered together with the rail 12.12'. The curved frame 18 also descends, and the face piece 1
4b and the flexible face plate 21 are separated from the surface of the lined concrete B.

As the curved frame 18 descends, the jack arm 2
2 gradually reduces the lower end of the curved frame 18 to the column 7.
At the same time, the wire 21c is pulled up by the winding device 26.
When the tip of the flexible face plate 21 is wound up, the tip of the flexible face plate 21 is pulled into the inside of the curved frame 18 via the adapter 28.

Then, the midway of the face plate 21 in the adapter 28 portion comes into contact with the roller 25, and the downward movement of the curved frame for one day is stopped. Then, the jack arm 22 is removed. .

After doing this, the top frame 14 can be advanced along the rail 12' by the rollers 15, and the curved frame 18 can be advanced along the rail 12 by the rollers 16 with the flexible face plate 21 attached. can.

To set the formwork again after moving forward by the required length, loosen the winding device, attach the jacking arm 22 and gradually extend it, and raise the rail 12, 12' to move the top frame 14 and the curved It is assumed that the frame 18 is raised and the curved frame 18 has a divided body 18c attached thereto.

In addition, although the above embodiment described a tunnel in the horizontal direction, it is also possible to apply the present invention to a tunnel vertical hole.

In that case, the pillars will serve as horizontal support, and the entire formwork will be suspended from above using wires or the like to allow it to slide.

[Effects of the Invention] As described above, in the movable formwork for tunnel lining of the present invention, only the top frame and the curved frame to which the face plate is attached are moved, so there is no need to use the formwork frame support as in the conventional case. There is no need to move the entire frame, there are few moving parts, and it can be easily done by hand.

Furthermore, since the formwork can be advanced without moving the trestle or support, even if cables are installed in the tunnel, the formwork can be transferred while protecting the cables. As a result, it can be used not only as a formwork for secondary lining of tunnels but also for tertiary lining.

[Brief explanation of the drawing]

Fig. 1 is a front view of one embodiment of the movable formwork for tunnel lining of the present invention when set, Fig. 2 is a partial front view of a flexible face plate, and Fig. 3 is a portion of the elevating mechanism of the formwork. 4 is a partially omitted side view of the same as above, FIG. 5 is a front view during demolding and movement, and FIG. 6 is a front view showing a conventional example. 1... Rail 2... Frame 3... Telescopic support 5... Form face plate 7... Support 7b... Main body 7d... Protrusion 9.9'... Screw ring 11, ll' , 11'... Cross member 13... Lifting ring 14a... Mounting members 15, 16... Roller 1 day... Curved frame 18a, 18b, 18c = Divided body 19... Pin 21... - Flexible face plate 21b... Spacer 22... Jacket arm 24... Screw jack 26... Winding device 28... Adapter 4... Curved frame 6... Jacket arm 7a... Jacket base 7C... Threaded portion 8... Support mounting block 10... Ranks 12, 12' for cable storage... Rail 14... Top frame 14b... Face plate 17... Support member 20. ...Spacer 21a...Metal vibrator 21c...Wire 23...Support frame 25...Roller 27...Peeling sheet Fig. 6

Claims (1)

[Claims] Supports lined up in the width direction of the tunnel and set up at appropriate intervals in the length direction of the tunnel, and having rails at the top that extend in the length direction of the tunnel are movable up and down, and the supports lined up in the width direction engage with the rails. a top frame with a face plate slidably provided by a roller that engages with the rail; a curved frame that is suspended from a hinge from a roller that also engages with the rail and is composed of a combination of split bodies; A blind-shaped flexible face plate stretched along the outside of the curved frame, a support, a jack arm interposed between the curved frames, and a winding device for the blind-shaped flexible face plate attached to the inside of the curved frame. A mobile formwork for tunnel lining, characterized by comprising: