JP3157488B2 - Method and apparatus for placing concrete for tunnel using formwork with boxless foam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency telephone, a fire extinguisher, etc., when a concrete for secondary lining is put into a tunnel by using a box-extracted foam which is disposed on a formwork so as to be able to protrude. The present invention relates to a method and an apparatus for placing concrete for a tunnel by using a formwork having a box-opening form capable of simultaneously forming a storage space for installing disaster facilities. In the present specification, “placement” refers to filling fluid concrete, which has not been cured and hardened, between the formwork and the tunnel inner wall surface (excavated surface) or the primary lining concrete. .

[0002]

2. Description of the Related Art Originally, in preparation for a disaster, disaster facilities such as emergency telephones and fire extinguishers are permanently installed at predetermined intervals in a tunnel (see FIG. 6).

[0003] The storage space for installing this disaster facility is formed at the same time when the concrete for secondary lining is poured into the tunnel.

As shown in FIG. 10, this method for forming a storage space for disaster equipment precedes a formwork for placing concrete for secondary lining, and corresponds to a storage space for disaster equipment in a tunnel in advance. After installing the empty box form,
After moving the formwork in sequence and fixing the boxed form and the formwork, cast concrete for secondary lining, and after curing the concrete, remove the boxed form and the formwork to form. It had been.

[0005] As shown in Figs. 7 to 9, the structure of the box-extracted foam is formed by connecting a large number of foam members.

[0006] In the installation work of this boxed form in the tunnel, it is fixed to the bottom of the tunnel by bolts.

[0007] Further, the fixing work of the box-extracted form and the formwork is carried out by checking the installation position of the box-extracted form through the inspection window of the formwork and fixing the both from the inside of the form by using bolts. I was

After curing and curing of the concrete for secondary lining poured into the tunnel, it is necessary to remove the box form as well as remove the mold.

At present, it takes about one day each for the work of installing the box-opened form in the tunnel and the work of removing the box-outed form.

When several types of disaster facilities are installed in the same tunnel, it is necessary to prepare several types of boxed forms.

In FIGS. 6 to 10, reference numeral 12 denotes a mold;
Is a tunnel, 16 is a secondary lining concrete, 24 is a tunnel inner wall surface, 34 is a disaster facility, 36 is a storage space,
Reference numeral 38 denotes a bottom surface of the storage space 36, 44 denotes a box-extracted foam, 46 denotes a foam member, and 48 denotes a fixing bolt.

[0012]

Conventionally, when forming a storage space for a disaster facility at the time of placing concrete for secondary lining in a tunnel, a box-opened form separate from a formwork has been used. The work of fixing the boxed form to the floor of the tunnel and the work of fixing it to the formwork are indispensable, and this work is not only troublesome but also requires a long working time.

In addition to the removal of the mold, it is also necessary to remove the boxed form. In removing the boxed form, care must be taken to prevent damage to the storage space of disaster facilities. Work has been required, and not only is it troublesome, but also the work efficiency is poor.

[0014] Further, it is necessary to prepare several types of boxed forms in accordance with the type of disaster equipment, which causes a problem that construction costs rise.

In view of the above drawbacks, the present invention integrates a boxed form for forming a storage space for a disaster facility with a formwork, and installs the disaster facility when placing concrete for secondary lining in a tunnel. An object of the present invention is to provide a method and an apparatus for placing concrete for a tunnel by using a mold having a die-cutting form that can be easily and efficiently formed in accordance with a storage space.

[0016]

According to the method of the present invention, emergency facilities such as emergency telephones and fire extinguishing equipment are installed in a tunnel through a form having a top end form and both side forms arranged on a gantry. In the method of forming a storage space to be installed and placing concrete for secondary lining,
On at least one side form of the formwork, a boxed form that is freely protruded from the side form toward the inner wall surface of the tunnel, corresponding to the width of the storage space of the disaster equipment,
After securing the storage space for disaster equipment by protruding from the side foam, the concrete for secondary lining is poured into the tunnel, or the main body and the lower part of the boxed foam are After the curing and curing of the cast concrete for secondary lining and removal of the mold, the lower part of the box-extracted foam is moved inside the mold,
By moving the main body of the box-extracted foam inside the formwork, it is possible to prevent damage to the bottom of the storage space for disaster facilities formed by placing concrete for secondary lining when removing the box-extracted foam. It is characterized by the following.

The apparatus of the present invention forms a storage space for installing emergency equipment such as emergency telephones and fire extinguishers in a tunnel through a form having a top end foam and two side foams arranged on a gantry. In addition, in an apparatus for casting concrete for secondary lining, at least one side form of the form, a boxed form is disposed so as to freely project from the side form toward the inner wall surface of the tunnel,
The boxed foam is made to protrude from the side foam in accordance with the width of the storage space for disaster facilities, and after securing the storage space for disaster facilities, concrete for secondary lining is cast in the tunnel. Or the boxed form, the main body and the lower part can be separated and moved,
At the time of removing the mold after curing and hardening of the cast concrete for secondary lining, after moving the lower part of the boxed form to the inside of the form, move the main part of the boxed form to the inside of the form. This prevents damage to the bottom of the storage space for disaster facilities formed by placing concrete for secondary lining when removing the boxed form.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete casting device for a tunnel using a form provided with a boxed form according to the present invention is shown in FIG.
As shown in FIG. 6 to FIG.

The formwork 12 used in the present invention comprises the tunnel 1
4 is for placing concrete 16 for secondary lining into the inside 4. On a gantry 18 movably disposed in the tunnel 14, a top end foam 20 and both side foams 22, 22 are mounted on the gantry 18. Are arranged movably in the length direction of the first and second forms 20, 22 and 22 are expandable and contractable, and both sides of the forms 22 and 22 are foldable.

At least one of the side forms 22 on the left side of FIG.
A box-extracted form 26 is provided so as to freely project from the side form 22 toward the side.

In the present embodiment, the box removing form 26 is a box-shaped section as in the conventional example, and is connected to the side form 22 via a rotating arm 28 so as to be freely protruded (movable).

The boxed form 26 has a main body 30 and a lower part 32 which can be separated and moved.

This is because the lower portion 32 of the boxed form 26 is moved to the inside of the mold 12 at the time of releasing the form 12 after curing and curing of the poured concrete 16 for secondary lining, and then removing the box. By moving the main body 30 of the form 26 to the inside of the formwork 12, a disaster facility 34 formed by placing the concrete 16 for secondary lining when the boxed form 26 is removed from the form 26.
This is to prevent the bottom 38 of the storage space 36 from being damaged.

The means for projecting (moving) the boxed form 26 from the main body 30 and the lower part 32 from the side form 22 is by a hydraulic jack 40.

In the drawing, reference numeral 42 denotes a connecting shaft between the main body 30 and the lower part 32 of the box-cutting form 26, and 50 denotes a mold-cutting form 26.
2 shows a portion of the storage space 36 that is expected to be damaged when the lower portion 32 and the main body portion 20 are removed at the same time.

A method of forming the storage space 36 of the disaster facility 34 and placing the secondary lining concrete 16 in the tunnel 14 using the present apparatus will be described in detail below.

First, the formwork 12 is moved to a predetermined position of the tunnel 14, and the box-extracted form 26 is protruded toward the inner wall surface 24 of the tunnel corresponding to the width of the storage space 36 of the disaster facility 34 to be formed.

At this time, the storage space 36 of the disaster facility 34
Even if the width of the box-shaped form 26 is different in each step, the length of the boxed form 26 protruding toward the inner wall surface 24 of the tunnel can be adjusted each time.

Further, the side opposite to the tunnel excavation side of the formwork 12 needs to be overlapped with an already-placed concrete laying portion for secondary lining (not shown).

Next, the periphery of the formwork 12 on the tunnel excavation side is securely covered (stopped).

Thereafter, concrete 16 for secondary lining is cast and cured.

Next, after the lower portion 32 of the punched form 26 is moved to the inside of the mold frame 12 via the hydraulic jack 40, the main body 30 of the boxed form 26 is moved to the hydraulic jack 4.
0, the concrete 16 for the secondary lining is removed when the boxed form 26 is removed from the mold.
Storage space 3 for disaster facilities 34 formed by casting
6 can be prevented from being damaged.

Next, the mold 12 is removed.

According to the above process, the concrete for secondary lining is cast at the place where the formwork 12 is installed, and the disaster equipment 3
4 is completed.

The casting of the secondary lining concrete is performed by sequentially moving the formwork 12 toward the tunnel excavation side.
This is performed over the entire length of the tunnel 14.

Also, when placing concrete for secondary lining,
When the storage space 36 of the disaster facility 34 is not formed, the covering member 43 (shown by the imaginary line in FIG. 5) is loaded into the gap between the formwork 12 and the boxed form 26, and the secondary lining is performed as usual. By placing concrete for concrete, the concrete placing surface for secondary lining can be formed uniformly.

In the present embodiment, the means for projecting (moving) the boxed form 26 from the main body 30 and the lower part 32 from the side form 22 is by means of the hydraulic jack 40.
Other moving means such as a screw motor may be used, or another moving mechanism may be used.

If there is no problem even if the bottom 38 of the storage space 36 of the disaster facility 34 is damaged (the shape of the bottom 38 is not so problematic in design), the lower part 32 of the boxed form 26 is removed. It is self-evident that the main unit 30 is integrated and moved without being separated and movable.

When disposing the storage space 36 of the disaster facility 34 on both sides of the tunnel 14, it is obvious that the box-extracted form 26 is disposed on the forms 22 on both sides of the form 12 so as to be able to protrude respectively. That is.

The mold 12 is freely expandable, contractible and foldable, but is not necessarily limited to the formable and foldable one.

In this embodiment, the concrete is cast in a semi-circular tunnel or the like.
For example, it can be used for underwater tunnels, sewers, and the like.

[0042]

According to the method and the apparatus for placing concrete for a tunnel by using a formwork provided with a boxed form according to the present invention, the boxed form for forming a storage space for disaster facilities is replaced with a side form of the formwork. The boxed form can be protruded toward the inner wall surface of the tunnel in accordance with the width of the storage space for disaster facilities to be formed. There is no need to fix the box-extracted foam to the bottom of the tunnel and to remove the box-extracted form, which is necessary in the past, which helps to improve the work efficiency.

Also, by separating and moving the main body portion and the lower portion of the box-extracted foam, the concrete for the secondary lining is cast and cured, and then the lower portion of the die-cut foam is first moved to the inside of the mold. Then, the main body of the boxed form can be moved to the inside of the mold, and the bottom of the storage space for disaster facilities formed by casting concrete for secondary lining when removing the boxed form is removed. Damage can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a concrete placing device for a tunnel using a formwork provided with a boxed foam according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged front view of a main part showing a first removal state of the box-extracted foam.

FIG. 4 is an enlarged front view of a main part showing the second detached state.

FIG. 5 is an enlarged front view of a main part showing a third detached state.

FIG. 6 is a schematic sectional view of a tunnel provided with a storage space for disaster facilities.

FIG. 7 is a front view showing a conventional example of a boxed form.

FIG. 8 is a side view of the same.

FIG. 9 is a sectional view taken along line AA of FIG. 8;

FIG. 10 is a schematic plan view showing a conventional operation for forming a storage space for disaster facilities.

[Explanation of symbols]

 12 Formwork 14 Tunnel 16 Concrete for secondary lining 18 Gantry 20 Top-end form 22 Side form 24 Tunnel inner wall surface 26 Box-out form 30 Main unit (box-out form) 32 Lower part (box-out form) 34 Disaster equipment 36 Storage space (for disaster facilities) 38 Bottom part (for storage space) 40 Hydraulic jack

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Okamoto 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura Gumi Co., Ltd. (72) Inventor Shin-ichi Tokushige 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi (72) Inventor Hiroshi Okada 1-20-10 Toranomon, Minato-ku, Tokyo Nishimatsu Construction Co., Ltd. (72) Inventor Toshihiko Yatsu 1-20-10 Toranomon, Minato-ku, Tokyo Nishimatsu Construction Co., Ltd. Inside the company (72) Inventor Tsutomu Kitagawa 144 Shinjocho, Motosu-gun, Gifu Prefecture Gifu Kogyo Co., Ltd. (72) Inventor Tsunehide Okubo 144 Shinjocho, Masamachi-cho, Motosu-gun, Gifu Gifu Kogyo Inside the Shikisha company (72) Inventor Yoshiaki Otomo 144 Shinjocho, Motosu-gun, Gifu Prefecture 144 Article Gifu Industrial Co., Ltd. (56) References JP-A-62-121297 (JP, A) JP-A-9-158690 (JP , A) JP-A-6-240997 (JP, A) JP-A-56-55099 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 11/10

Claims (4)

(57) [Claims] 1. A form (12) comprising a gantry (18) having a top foam (20) and two side foams (22), (22).
A method of forming a storage space (36) for installing emergency equipment (34) such as emergency telephones and fire extinguishing equipment in the tunnel (14) and placing concrete (16) for secondary lining through In at least one side foam (22) of the formwork (12), a boxed form (26), which is disposed so as to freely project from the side foam (22) toward the tunnel inner wall surface (24), After securing the storage space (36) for the disaster equipment (34) by projecting from the side foam (22) according to the width of the storage space (36) of the equipment (34), it is inserted into the tunnel (14). Secondary lining concrete
(16) A method for placing concrete for a tunnel using a formwork provided with a box-extracted foam, characterized by placing a box. 2. A box body form (26) having a main body (30) and a lower part (3).
2) can be separated and moved, and when the mold (12) after curing and curing of the poured concrete for secondary lining (16) is released, the lower part (32) of the boxed form (26) is removed from the mold. After moving inside (12),
By moving the body part (30) of the boxed form (26) inside the formwork (12), it is formed by casting the concrete for secondary lining (16) when removing the boxed form (26). Disaster equipment
2. The method according to claim 1, wherein the bottom of the storage space of the storage space is prevented from being damaged. 3. A formwork (12) comprising a gantry (18) with a top foam (20) and foams on both sides (22), (22).
A storage space (36) for installing emergency equipment (34) such as emergency telephones and fire extinguishers in the tunnel (14), and a device for placing concrete for secondary lining (16) In, at least one side form (22) of the formwork (12), a box emptying form (26) is disposed so as to freely project from the side form (22) toward the tunnel inner wall surface (24) side, In accordance with the width of the storage space (36) of the disaster equipment (34), the storage space (36) of the disaster equipment (34) was secured by projecting the boxed form (26) from the side foam (22). rear,
An apparatus for placing concrete for a tunnel by a formwork provided with a boxed form, wherein the concrete for secondary lining (16) is placed in the tunnel (14). 4. A main body (30) and a lower portion (3) of a boxless form (26).
2) can be separated and moved, and when the mold (12) after curing and curing of the poured concrete for secondary lining (16) is released, the lower part (32) of the boxed form (26) is removed from the mold. After moving inside (12),
By moving the body part (30) of the boxed form (26) inside the formwork (12), it is formed by casting the concrete for secondary lining (16) when removing the boxed form (26). Disaster equipment
4. A concrete placing device for a tunnel by a formwork provided with a boxed form according to claim 3, wherein a damage to a bottom portion (38) of the storage space (36) of the (34) is prevented.