JPH11294093A - Method for placing concrete for tunnel, and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for placing concrete in which a mold and a gantry can be easily moved on a curved part of a tunnel, and concrete for a secondary lining can be safely and efficiently placed. SOLUTION: A mold 12 is split in the longitudinal direction, a pair of traveling trucks 30 are movable in the mold 12, and the length of the mold 12 and the distance between a pair of traveling trucks 30 are variable corresponding to the tunnel length for concrete placement. The mold 12 is moved by varying the distance between a pair of traveling trucks 30 corresponding to the length of a mold 12b not to be used and the length of a mold 12a to be used, and concrete for the secondary lining is placed in a tunnel 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete casting method for a tunnel capable of efficiently casting concrete for secondary lining by shortening the total length of a formwork in correspondence with a curved portion of a tunnel, and a method for casting concrete. It concerns the device.
In the present specification, “placement” refers to filling fluid concrete, which has not been cured and hardened, between a mold and a tunnel excavation surface or a primary lining surface (such as a steel segment).

[0002]

2. Description of the Related Art Originally, a straight line and a curved line are often mixed in a single tunnel. In a curved portion, the outer shape lines on both sides of the form are expressed as straight lines. Consideration is given to expressing a shape corresponding to a curved portion by performing multi-stage casting using a shortened formwork (see FIGS. 6, 8, and 9).

[0003] At this time, the divided formwork to be used is firstly dismantled by an operator, moved to a concrete placing position via a movable carriage, and then moved between a pair of traveling carriages. This has been done by fixing a form to be used to a gantry having a length corresponding to the entire length of the form, which is connected by beams.

When the gantry is moved in the curved part of the tunnel, since the lower part of the gantry cannot be turned, the gantry is forcibly slid on the concrete-placed floor.

In FIGS. 6, 8 and 9, 14 is a tunnel, 16 is a secondary lining concrete, and 42 is a tunnel 1
4 is a straight section, 44 is a curved section of the tunnel 14, 46 is a formwork, 48 is a gantry, 50 is a traveling trolley, 52 is a beam,
54 is a tunnel excavation surface or a primary lining surface, 56 is a concrete floor surface, 58 is a concrete placing portion for a secondary lining,
Reference numeral 62 denotes a movable cart.

[0006]

Conventionally, in placing concrete for secondary lining on a curved portion of a tunnel, a gantry having a length corresponding to the entire length of the form is divided into a form used and a form not used. The frame has to be moved many times, and the floor surface on which the concrete is cast is easily damaged by the movement of the gantry.

[0007] In addition, the movement of the gantry in the curved section of the tunnel is caused by the fact that the lower part of the gantry cannot be turned, so that the distance between the gantry and the formwork and the tunnel excavation surface or the primary lining surface in the width direction of the tunnel in the narrow mine. However, there has been a problem that the method is carried out with great care so as not to make contact and that a great deal of effort is required.

[0008] In the case where the gantry is used by an operator without using the gantry, dismantling and moving of the formwork is required for 3 to 10 days, and the operation also needs to be performed in a narrow mine.
It was a tough job and the danger was a problem.

In addition, in the case of a worker, there has been a problem that as the curvature of the curved portion is larger, the dismantling and moving operations of the formwork are increased, and the construction period is greatly delayed.

In view of the above drawbacks, the present invention makes it easy to move a formwork and a gantry in a curved portion of a tunnel, and can safely and efficiently cast concrete for secondary lining. It is an object of the present invention to provide a concrete casting method and a device therefor.

[0011]

According to the present invention, a formwork comprising a top end form and both side forms is disposed on a gantry comprising a pair of traveling carts, and a secondary form is placed in a tunnel through this formwork. In the method of casting concrete for lining, the form is divided in the length direction and each traveling vehicle is movable in the form, so that the mold is adapted to the length of the tunnel to be cast. The length of the frame and the distance between the pair of traveling vehicles can be changed.After the casting is completed, the mold is divided according to the length of the tunnel to be cast, and then moved into the mold using the traveling truck. The formwork to be used is fixed to the formwork to be used, or a pair of traveling trolleys are connected by a beam material corresponding to the length of the formwork to be used, and moved into the formwork to be used and fixed. After folding and moving to the casting position, Characterized by placing concrete for secondary lining in a tunnel, or fixing a divided unused formwork to a pair of traveling carts, or a beam corresponding to the length of the formwork After being fixed to a pair of traveling vehicles connected by a material, folding the formwork, moving the pair of traveling vehicles to the concrete placing progress side, moving the traveling vehicle into the formwork using the mold Affixed to the frame, or connected to a pair of traveling carts by a beam material corresponding to the length of the form to be used, moved into the form to be used, and fixed, and the form to be used was folded and placed. After being moved to, the formwork is expanded, and concrete for secondary lining is poured into the tunnel,
Alternatively, the traveling vehicle is constituted by a driving roller portion, the driving roller portion, and a gate portion rotatably provided on the traveling roller portion, and the driving roller portion is rotated with respect to the portal portion, so that the traveling vehicle in the formwork is formed. And the movement of the traveling vehicle in the curved part of the tunnel is facilitated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete casting device for a tunnel according to the present invention has the following configuration as shown in FIGS.

The formwork 12 used in the present invention is a tunnel 1
4 is for placing the concrete 16 for secondary lining into the gantry 4. A top end form 20 and both side forms 22, 22 are arranged on a gantry 18.
Is telescopic.

In the present embodiment, the expansion and contraction means of the top end foam 20 is a hydraulic jack 24 mounted on the gantry 18, and the expansion and contraction means of the both side forms 22 and 22 are hydraulic jacks 26 individually mounted on the both side forms 22 and 22. It is.

The top end form 20 and both side forms 22 and 22 are divided into a plurality of parts in the longitudinal direction of the formwork 12, and the divided forms 20, 22, and 22 are connected via fastening means 28 such as bolts. Have been.

The gantry 18 is composed of a pair of traveling vehicles 30, and the formwork 12 in which the respective foams 20, 22, 22 are connected via fastening means 28 is fixed between the pair of traveling vehicles 30. Further, the traveling vehicle 30 includes a drive roller section 34 and a portal section 36, and the drive roller section 34 and the portal section 36 are rotatably connected.

In this embodiment, the turning mechanism of the driving roller section 34 and the gate section 36 of the traveling vehicle 30 connects the driving roller section 34 and the gate section 36 via a turning shaft 38, and the driving roller section 34. A pivot jack 40 for pivoting the portal section 36 is mounted on the top, and the pivot jack 40 is actuated.
4 is turned.

In the figure, 12a is a divided used formwork, 12b is a divided unused formwork, 54 is a tunnel excavation surface or a primary lining surface, 56 is a tunnel floor surface, 58
Numeral denotes a concrete placing part for the secondary lining, and numeral 60 denotes beams on the wife side and the lap side for supporting the formwork 12.

Using this apparatus, the tunnel 1 shown in FIG.
FIG. 5 shows a method of placing the concrete 16 for secondary lining on the curved portion 44 of FIG. 4 (the method according to claim 1 and claim 2).
This will be described in detail below.

First, after completion of the installation, the tunnel 1 to be installed
The mold 12 is divided in the length direction corresponding to the tunnel length of the curved portion 44 of No. 4.

At this time, the formwork 12 may be left as it is cast, and the formwork 12 is previously placed on the side where the concrete is cast (FIG. 5).
May be moved to the left) via a pair of traveling carts 30.

Next, the pair of traveling vehicles 30 is moved into the mold 12a to be used.

At this time, since the beam 60 on the wife side or the lap side is mounted on the formwork 12 at both ends in the length direction (left and right ends in FIG. 5A), it is not necessary. Since each beam 60 is not mounted on the intermediate form 12, a beam 32 corresponding to the length of the form 12 a to be used is used.
To connect the pair of traveling vehicles 30.

Further, by rotating the drive roller portion 34 with respect to the portal portion 36 of each traveling vehicle 30 and moving the same, the tunnel excavation surface or the primary lining surface 54 and the portal portion 36 are moved.
To a longer (longer) distance from the traveling carriage 30 in the formwork 12
The moving space can be sufficiently secured, and the moving operation can be easily performed without requiring careful attention.

Next, the pair of traveling carts 30 and the formwork 12a to be used are fixed, and the formwork 12a to be used is folded and moved to a driving position (see FIGS. 5B and 5C).

At this time, the driving roller unit 34 is swiveled and moved with respect to the gate-shaped portion 36 of each traveling vehicle 30 corresponding to the curved portion 44 of the tunnel 14, thereby forcibly moving the traveling vehicle 30 with respect to the floor surface. Since it is not slid and moved, damage to the floor can be prevented and the labor of the operator can be drastically reduced.

Next, the mold 12a is moved to the hydraulic jacks 24,2.
6 to be extended.

At this time, the wrap side of the formwork 12a needs to be overlapped with the already placed concrete placing portion 58 for secondary lining.

Next, the edge on the wife side of the mold frame 12a is securely covered (stopped).

Next, the tunnel excavation surface or the primary lining surface 5
The secondary lining concrete 16 is cast between the mold 4 and the mold 12a, and the secondary lining concrete 16 is cured and hardened.

Next, the mold 12a is removed.

Through the above process, the concrete for the secondary lining is completed at a predetermined location in the curved portion of the tunnel 14 where the formwork 12a is installed.

The casting of the secondary lining concrete is performed by sequentially dividing and moving the formwork 12 toward the concrete placement progressing side (the right side in FIG. 5), and is performed over the entire curved portion of the tunnel 14.

A method of placing the concrete 16 for secondary lining on the curved portion 44 of the tunnel 14 using the present apparatus (the method according to claims 3 and 4) will be described with reference to FIG. Details will be described below.

First, the curved portion 4 of the tunnel 14 to be cast
The mold 12 is divided in the length direction corresponding to the tunnel length of No. 4 (see FIG. 7A).

Next, the divided unused formwork 12b is fixed to the pair of traveling carriages 30 (gantry 18).

When the unused formwork 12b at the intermediate portion in the longitudinal direction is moved, a pair of traveling carriages 30 are connected in advance by beams 32 corresponding to the length of the formwork 12b (FIG. 7). (B)).

Next, the formwork 12b is folded and moved (evacuated) by the pair of traveling carts 30 to the concrete placing progression side so as not to hinder the secondary lining work of the tunnel curved portion.
(See FIG. 7C).

Next, the pair of traveling carts 30 is moved into the mold 12a to be used.

Further, the form 1 used in the middle portion in the length direction is used.
When moving 2a, a pair of traveling vehicles 30 is connected in advance by beam members 32 corresponding to the length of this formwork 12a.

Next, the pair of traveling carts 30 and the formwork 12a to be used are fixed, and the formwork 12a to be used is folded and moved to the driving position (see FIG. 7 (d)).

The form 12a is extended via the hydraulic jacks 24 and 26.

At this time, the wrap side of the formwork 12a needs to be overlapped with the already placed concrete placing portion 58 for secondary lining.

Next, the peripheral edge of the form side of the formwork 12a is securely covered (with a stop).

Next, the tunnel excavation surface or the primary lining surface 5
The secondary lining concrete 16 is cast between the mold 4 and the mold 12a, and the secondary lining concrete 16 is cured and hardened.

Next, the mold 12a is removed.

Through the above-described steps, the concrete placement for the secondary lining is completed at a predetermined portion of the curved portion of the tunnel 14 where the formwork 12a is installed.

The casting of the secondary lining concrete is performed by sequentially dividing and moving the formwork 12 toward the concrete placing progressing side, and is performed over the entire curved portion of the tunnel 14.

The method according to the first and second aspects of the present invention can perform concrete casting more efficiently than the methods according to the third and fourth aspects.

The use of the apparatus according to the present invention is not limited to the shortening and restoring work of the formwork 12 at the curved part of the tunnel, but can also be used for the work of restoring the formwork 12 at the straight part of the tunnel. It is self-evident.

In the present embodiment, the top end foam 20,
The expansion and contraction means of the two-sided foams 22 and 22 are both formed by hydraulic jacks, but may be formed by other moving means such as a screw jack or another expansion and contraction mechanism.

In the present embodiment, the traveling carriage 30 employs a structure in which the drive roller portion 38 can freely rotate with respect to the gate portion 36. However, the gate portion 36 and the drive roller portion 38 cannot rotate. Even if it is an integral structure,
Although a work load is required to move the curved portion of the tunnel 14, moving the divided formwork is an extremely easy operation.

In this embodiment, a pair of traveling vehicles 30
By attaching and detaching beam members 32 of different lengths between
This is performed using only the gantry 18,
The beam members 32 having different lengths are previously paired with the pair of traveling carts 3.
It is self-evident that the gantry 18 is fixedly attached to the space 0 and the gantry 18 is used in combination.

In this embodiment, the concrete is cast in a substantially semicircular tunnel or the like.
For example, it can be used for construction of underwater tunnels and sewer systems.

[0055]

According to the method and the apparatus for placing concrete for a tunnel according to the present invention, the form can be divided in the longitudinal direction and each traveling vehicle can be moved in the form. Since the length of the formwork and the distance between the pair of traveling vehicles can be changed in accordance with the length of the tunnel to be cast, the formwork not to be used during secondary lining of a tunnel length shorter than the entire length of the formwork and Depending on the length of the formwork to be used, the distance between the pair of traveling vehicles can be changed at any time to move the formwork, and after finishing the lining work of the tunnel curved part,
When the length of the formwork is restored during the lining work of the straight section of the tunnel, the working time can be shortened, the work can be done safely even in a narrow mine, and the concrete can be moved efficiently and the concrete for secondary lining Installation, and the construction period can be significantly reduced.

Further, the traveling vehicle is constituted by a drive roller portion, a drive roller portion, and a gate portion which is rotatably provided on the drive roller portion, and the drive roller portion is turned with respect to the gate portion to excavate the tunnel. The distance between the surface or the primary lining surface and the gate-type part is widened (long), and a sufficient space for moving the traveling cart in the formwork can be secured. The movement of the traveling vehicle in the frame, and the traveling vehicle in the curved part of the tunnel,
Can be facilitated.

Further, since the drive roller section is turned with respect to the portal section, the gantry (traveling cart) at the curved section of the tunnel is not forced to slide on the floor surface. The floor can be prevented from being damaged, and the labor of the operator can be drastically reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a concrete casting device for a tunnel according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a side view showing the state of use.

FIG. 4 is a simplified plan view showing a use state of a gantry (traveling cart).

FIG. 5 is a simplified side view of a main part showing a mold moving step according to claims 1 and 2 of the present invention.

FIG. 6 is a plan view showing an arrangement of a formwork in a straight portion and a curved portion of the tunnel.

FIG. 7 is a simplified side view of a main part showing a mold moving step according to claims 3 and 4 of the present invention.

FIG. 8 is a simplified front view showing a use state of a conventional gantry (traveling vehicle).

FIG. 9 is a simplified side view of a main part showing a conventional mold moving process.

[Explanation of symbols]

 12 Formwork 14 Tunnel 16 Secondary Lining Concrete 18 Gantry 20 Top Form 22 Side Form 30 Traveling Cart 32 Beam 34 Drive Roller 36 Gate Section 44 Curved Section of Tunnel

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masato Uchida 1-1-13 Yamashita, Okayama City Large Hongumi Co., Ltd. (72) Inventor Teruaki Saegusa 6-8-10 Kanda Surugadai, Chiyoda-ku, Tokyo Large (72) Inventor: Tsutomu Kitagawa 144, 14-14, Masamasa, Motosu-gun, Gifu Gifu Kogyo Co., Ltd. (72) Masato Aoi 144, 144, Masamasa, Motosu-gun, Gifu Gifu Kogyo Co., Ltd. Inside

Claims (8)

[Claims] 1. A gantry comprising a pair of traveling carts (30).
(18) On top form (20) and bilateral forms (22),
In a method of disposing a formwork (12) consisting of (22) and placing concrete (16) for secondary lining in a tunnel (14) through the formwork (12), 12) can be divided freely in the length direction,
By making the (30) movable within the formwork (12), the length of the formwork (12) and the distance between the pair of traveling vehicles (30) can be changed according to the length of the tunnel to be cast After the installation is completed, the formwork (1
After dividing 2), the traveling vehicle (30) is moved into the formwork (12a) to be used, and is fixed to the formwork (12a) to be used.
a) is folded and moved to the casting position, then the formwork (12a) is expanded, and the concrete for secondary lining (16) is poured into the tunnel (14). Casting method. 2. A beam (32) is made detachable between a pair of traveling carts (30), and after completion of the casting, a form (1) is formed corresponding to a tunnel length to be cast.
After dividing 2), a pair of traveling vehicles (30) is connected by beams (32) corresponding to the length of the formwork (12a) to be used, and the formwork (30) using this traveling vehicle (30) is used. 12a) Move it inside and fix it to the formwork (12a) to be used.Fold the formwork (12a) to be used, move it to the casting position, expand the formwork (12a), 2. The method for placing concrete for tunnels according to claim 1, wherein concrete for secondary lining (16) is placed in the inside of (1). 3. A gantry comprising a pair of traveling carts (30).
(18) On top form (20) and bilateral forms (22),
In a method of disposing a formwork (12) consisting of (22) and placing concrete (16) for secondary lining in a tunnel (14) through the formwork (12), 12) can be divided freely in the length direction,
By making (30) movable within the formwork (12), the length of the formwork (12) and the distance between the pair of traveling vehicles (30) can be changed according to the length of the tunnel to be cast After dividing the formwork (12) according to the tunnel length to be cast, the divided unused formwork (12b) is
0), this formwork (12b) is folded, moved to the concrete placement progress side by a pair of traveling carriages (30), and then moved into the formwork (12a) using the traveling carriage (30). And the formwork (12a) to be used is fixed.
a) is folded and moved to the casting position, then the formwork (12a) is expanded, and the concrete for secondary lining (16) is poured into the tunnel (14). Casting method. 4. A beam (32) is made detachable between a pair of traveling carts (30), and after the installation is completed, the formwork (1) is made to correspond to the tunnel length to be installed.
After dividing 2), the divided unused formwork (12b) is fixed to a pair of traveling carts (30) connected by beams (32) corresponding to the length of this formwork (12b). Then, the formwork (12b) is folded and moved to the concrete placing progress side by a pair of traveling carts (30), and then a pair of beams (32) corresponding to the length of the formwork (12a) to be used is used. The traveling vehicle (30) is connected, the traveling vehicle (30) is moved into the formwork (12a) to be used and fixed to the formwork (12a) to be used, and the used formwork (12a) is folded. 4. The tunnel according to claim 3, wherein after being moved to the casting position, the formwork (12a) is expanded and concrete for secondary lining (16) is poured into the tunnel (14). Concrete casting method. 5. A driving roller (34), a driving roller (34), and a gate-shaped portion which is pivotally mounted on the traveling vehicle (30).
(36), and by rotating the drive roller section (34) with respect to the gate section (36), the traveling carriage in the formwork (12)
The tunnel according to claim 1, 2 or 3, wherein the movement of the traveling vehicle (30) and the traveling carriage (30) in the curved portion of the tunnel (14) are facilitated. Concrete casting method. 6. A gantry comprising a pair of traveling carts (30).
(18) On top form (20) and bilateral forms (22),
(22), formwork (12) is arranged, and this formwork
Concrete for secondary lining in tunnel (14) through (12)
In the apparatus for placing (16), the form (12) is moved in the longitudinal direction of each form (20), (22), (2).
2) can be freely divided, and each traveling vehicle (30) can be freely moved in the mold (12), so that the used form (12) can be divided through a pair of traveling vehicles (30).
a) A concrete casting device for a tunnel, which moves an unused formwork (12b). 7. The distance between the pair of traveling vehicles (30) can be changed freely by detachably attaching the beam member (32) between the pair of traveling vehicles (30). The concrete casting device for tunnels according to the above. 8. A driving roller (34) and a gate-shaped part which is pivotally mounted on the driving roller (34).
(36), and by rotating the drive roller section (34) with respect to the gate section (36), the traveling carriage in the formwork (12)
The concrete placing device for a tunnel according to claim 6 or 7, wherein the movement of the (30) and the movement of the traveling carriage (30) in the curved portion of the tunnel (14) are facilitated.