JPH0694795B2 - Wife stopper for building tunnel lining - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a). INDUSTRIAL APPLICABILITY The present invention uses a mobile formwork to cast in-situ concrete
The present invention relates to a suitable girder for building a tunnel lining, which is used when a lining of a tunnel is set and constructed using mortar (“concrete mortar” means “concrete” or “mortar”).

(B). 2. Description of the Related Art FIG. 9 is a diagram showing a state of a jointing surface when concrete mortar is placed by a conventional method.

Recently, a proposal has been made that the lining of the tunnel is continuously driven by using a movable form, instead of spraying.

Further, conventionally, in the tunnel, supporters made of a steel material such as H-section steel are installed along the tunnel cross section at predetermined intervals in the tunnel excavation direction.

(C). Problems to be Solved by the Invention In this case, as shown in FIG. 9, the surface of the splicing surface 1 of the lining becomes horizontal, and the strength of the splicing surface portion of the lining decreases. .

Also, in order to make such a splice surface at a right angle to the natural ground, it is possible to install a gable stopper between the support works.
However, since the steel members such as H-shaped steel are usually installed at a predetermined interval in the tunnel excavation direction in the support work, a dam stop is caused between the support works and an interference occurs between the support work and the dam stop. There is an inconvenience that it is difficult to install quickly and smoothly without any problems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a girder for constructing a tunnel lining which can make the piecing joint surface of the lining perpendicular to the ground in order to solve the above-mentioned drawbacks.

Further, the present invention provides a girder stop for constructing a tunnel lining that can be installed quickly and smoothly without causing interference between the support girder and the girder stop. It is for another purpose.

(D). Means for Solving the Problems That is, among the present invention, the invention of claim 1 is between the supporting works (5, 5) to be installed along the tunnel cross section at a predetermined interval in the tunnel excavation direction. Having a main body (7c) that can be installed, the main body is provided with a width dimension changing mechanism capable of enlarging or reducing the width dimension corresponding to the distance between the adjacent supporting members of the main body, and on both sides of the main body, Engaging means (7d,
7j) is provided.

Further, in the invention of claim 2, the main body (7c) is composed of a plurality of end plate pieces (7b, 7b) foldably provided so as to change the width dimension, and the plurality of foldable pieces are provided. The end plate pieces of No. 2 constitute the width dimension changing mechanism.

According to a third aspect of the invention, a movable plate (wherein the engaging means is movably provided to the main body via the slide mechanism (7k, 7m) so as to change the width dimension with respect to the main body ( 7
j), and the slide mechanism and the movable plate constitute the width dimension changing mechanism.

The numbers in parentheses indicate the corresponding elements in the drawings. For convenience, the present description is not limited to the description of the drawings. The following “(e).
The same applies to the column of "action".

(E). Action With the above-described configuration, according to the present invention, the main body is inserted by inserting the main body (7c) between the supporting members (5, 5) in a state where the width dimension of the main body (7c) is reduced, and then expanding the width dimension. The (7c) acts so as to be installed between the supporting works (5) via the engaging means (7d, 7j).

(F). Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a state in which a tunnel lining is constructed using an embodiment of a gable stop according to the present invention, FIG. 2 is a front view showing an embodiment of a gutter stop according to the present invention, and FIG. Is a side view of FIG. 2. FIG. 4 is a perspective view showing a state in which the gable stop shown in FIG. 2 is folded, and FIG. 5 is a cross section showing a state in which concrete mortar is placed using the gable stop according to the present invention. FIG. 6 is a front view showing another embodiment of the end stop according to the present invention, FIG. 7 is a side view of FIG. 6, and FIG. 8 is an operation state of a movable plate of the end stop of FIG. It is a front view.

In the tunnel 2, as shown in FIG. 1, a ground 3 is excavated in a semicircular shape in the directions of arrows A and B, and a support 5 made of H-shaped steel or the like is formed in the ground 3 by an arrow A, At predetermined intervals in the B direction,
It is installed along the cross section of the tunnel 2. Between the supports 5, 5 on the exit side of the tunnel in the direction of arrow A in the figure,
Concrete mortar is cast by a known method using a movable formwork to construct a lining 6.

Further, a girder stopper 7 according to the present invention is provided above the foremost supporting members 5 and 5 in the figure so as to connect the adjacent supporting members 5 and 5. As shown in Fig. 2 to Fig. 4, it can be opened and closed in the directions of the arrows C and D through the hinge 7a at the center, so that the width in the left-right direction of Fig. 2 corresponding to the distance between the adjacent supports is It has a main body 7c composed of end plate pieces 7b, 7b provided so as to be freely scaled. Engagement portions 7d with which the flange portions 5a, 5a of the support 5 are engaged are formed on both sides of the main body 7c in FIG.
Further, as shown in FIG. 3, a large number of irregularities 7e are formed on the surface of the main body 7c facing the concrete pouring space. Further, seal plates 7f, 7f made of a flexible material such as rubber are attached to each end plate piece 7b to support the end stop 7 by supporting members 5, 5,
It is provided at a position on the natural ground 3 side when it is mounted between them, and a hooking metal 7g is provided between the end plate pieces 7b, 7b. As shown in FIG. 2, the hook metal 7g has an arm 7h rotatably provided on one end plate piece 7b,
Further, the other end plate 7b is provided with an L-shaped engaging portion 7i with which the arm 7h is engaged.

Since the tunnel 2 and the girder stopper 7 have the above-mentioned structure, when constructing the lining 6 by placing concrete mortar between the supports 5 and 5 where the ground 3 of the tunnel 2 is exposed. As shown in FIG. 1, the gable stopper 7 according to the present invention is provided on the uppermost portion of the portion where concrete mortar is to be placed.
Put on. To do this, first, with the gable plate pieces 7b, 7b folded with the hinges 7a in between, the girder stoppers 5 and 5 between the girder stoppers 7 are formed.
Bring the gable stop 7 to the position where it should be installed, and in that state, as shown in FIG. 4, move the gable plate pieces 7b and 7b of the gable stop 7 that had been folded up to that point in the direction of arrow C. It is opened, and as shown in FIGS. 1 and 2, the engaging portions 7d, 7d formed on each end plate piece 7b are engaged with the flange portion 5a of each supporting member 5.

At this time, even if the distance between the adjacent supporters 5 and 5 in the left-right direction of FIG. 2 is partially narrowed by the lower flange portions 5a and 5a in the figure, the end stop 7 is in a folded state, that is, As shown in Fig. 2, the widthwise dimension of the left-right direction is reduced, and it is brought between the supports, and in that state, the dimension is expanded in the direction of arrow C in Fig. 4 and the dimension in the widthwise direction is enlarged. Since the girder stopper 7 and the strut members 5, 5 are installed between the strut members, there is no interference between the girder stopper members 7, 5 and 5, and the girder stopper 7 can be quickly and smoothly supported.
It can be installed between five.

When the end plates 7b, 7b are opened in the direction of the arrow C and the main body 7c is expanded into a plate shape, the arm 7h provided on one end plate plate 7b is rotated, as shown in FIGS. 2 and 3. Then, the other engaging portion 7i is fitted and engaged. Then, the unfolded state of the end plate pieces 7b, 7b is maintained by the hooking metal 7g, and the main body 7c is fixed to the natural ground 3
On the other hand, as shown in FIG. 3, they are installed in a substantially right angle state. In addition, the seal plate 7f provided on the ground 3 side of the gable plate piece 7b
Is made of a flexible material, the seal plate 7f is elastically deformed between the main body 7c installed between the supports 5, 5 and the ground 3, as shown in FIG. The concrete stopper and mortar are placed in this way, and the part on the right side in FIG.
It is cut off from the left part of the figure.

In this state, while moving a known movable formwork device from the lower side of the support work 5 in FIG. 1 in the direction of arrow E along the support work 5, concrete mortar is moved between the movable formwork device 3 and the ground 3. The lining 6 is constructed by placing it on the
When the mortar is placed up to the portion where the girder stopper 7 is installed, the placement of the concrete mortar in that portion is completed. Then, the wife stopper 7, as shown in FIG.
Since the installation is completed in a direction substantially perpendicular to the natural ground 3, the piecing joint surface 6a of the lining 6, which has been placed, is approximately perpendicular to the natural ground 3, as shown in FIG. Is formed.

In this way, when the cast concrete mortar solidifies, the engagement state of the arm 7h of the hook metal 7g and the engagement portion 7i is released, and the main body 7c is centered around the hinge 7a in the direction of arrow D in FIG. The girder stopper 7 is installed at a position where the lining 6 is to be placed next by removing the supporting members 5 and 5 in a folded shape.
Since many concavities and convexities 7e are formed on the concrete pouring surface side of the main body 7c, a large number of similar concavities and convexities are formed on the splicing surface 6a, and the adhesion of concrete and mortar during the subsequent splicing. Good condition is maintained.

In the above embodiment, the main body 7c is divided into the gable plate pieces 7b, 7b so that the main body 7c and the supporting member 5 can be connected to each other. Does not necessarily have to be provided so as to be foldable, and may have any configuration as long as the main body 7c can be reliably installed between the supporters 5 and 5 without causing interference with the supporter 5. That is, as shown in FIG. 6 to FIG.
Formed in the shape of a single plate, the movable plates 7j, 7j are formed on both sides in FIG. 6 through bolts 7k, elongated holes 7m, etc.
It is of course possible to provide 7l so as to project and fix in the directions of arrows F and G. When such a gable stop 7 is used, the gable stop 7 is installed by moving the movable plates 7j on both sides backward in the direction of arrow F as shown in FIG. In the state in which the widthwise dimension in the left-right direction in the figure is reduced, the main body 7c is inserted between the supporting members 5 and 5 from the lower side in FIG. 6, and when the inserting operation is completed, as shown in FIG. The movable plate 7j is projected in the direction of the arrow G, the size in the width direction is enlarged, and the gap formed between the main body 7c and the web portion 5b of the support 5 is closed. When removing, perform the procedure in the reverse order.

(G). EFFECTS OF THE INVENTION As described above, according to the first aspect of the present invention, it can be installed between the supporters 5 and 5 installed at a predetermined interval in the tunnel excavation direction along the tunnel cross section. The main body (7c) is provided, and the main body is provided with a width dimension changing mechanism capable of enlarging or reducing the width dimension corresponding to the distance between the adjacent support members of the main body. Since the engaging means such as the engaging portion 7d and the movable plate 7j is provided, it is possible to set concrete mortar when constructing the lining 6 by installing the end stop 7 between the supporting works 5 and 5. The joint surface 6a
It can be easily formed substantially at right angles to the natural ground 3, and the strength of the portion at the time of splicing can be improved.

In addition, since the width dimension of the main body can be enlarged or reduced by the width dimension changing mechanism, when installing the girder stopper during the support work, there is no interference between the support and the girder stopper. The wife stopper can be installed quickly and smoothly.

Further, as in claim 2, the main body 7c is provided with a plurality of end plate pieces which are foldably provided so as to change the width dimension.
When a plurality of end plate pieces 7b, 7b, which are foldably provided, constitute the width dimension changing mechanism, in addition to the effect of claim 1, when the end stopper is not used,
The wife stopper can be stored in a folded state, enabling compact storage.

Further, as in claim 3, the engaging means is movably provided to the main body through a slide mechanism such as a bolt 7k and an elongated hole 7m so as to change the width dimension with respect to the main body. When it is the movable plate 7j and the slide mechanism and the movable plate constitute the width dimension changing mechanism, in addition to the effect of claim 1, the slide mechanism enables fine adjustment of the width dimension.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a tunnel lining is constructed using an embodiment of a gable stop according to the present invention, FIG. 2 is a front view showing an embodiment of a gutter stop according to the present invention, and FIG. Is a side view of FIG. 2. FIG. 4 is a perspective view showing a state in which the gable stop shown in FIG. 2 is folded, and FIG. 5 is a cross section showing a state in which concrete mortar is placed using the gable stop according to the present invention. FIG. 6 is a front view showing another embodiment of the end stop according to the present invention, FIG. 7 is a side view of FIG. 6, and FIG. 8 is an operation state of a movable plate of the end stop of FIG. A front view and FIG. 9 are views showing a state of a jointing surface when concrete mortar is cast by a conventional method. 2 …… Tunnel 5 …… Supporting work 7 …… Wife stop 7c …… Main body 7d …… Engagement means (engagement part) 7j …… Engagement means (movable plate) 7b …… Tie plate piece 7k …… Slide mechanism ( Bolt) 7m …… Sliding mechanism (oblong hole)

Claims (3)

[Claims] 1. A main body that can be installed between supporting works installed at a predetermined interval in a tunnel excavating direction along a section of the tunnel, wherein the main body is adjacent to the supporting works. A girder for constructing a tunnel lining constructed by providing a width dimension changing mechanism capable of enlarging and reducing a width dimension corresponding to a distance between the main body and engaging means for engaging with the supporting work on both sides of the main body. 2. The main body is composed of a plurality of end plate pieces that are foldably provided so as to change the width dimension, and the plurality of end plate plates that are provided foldably constitute the width dimension changing mechanism. The girder stopper for constructing a tunnel lining according to claim 1. 3. The movable plate, wherein the engaging means is movably provided to the main body via a slide mechanism so as to change the width dimension with respect to the main body, and the slide mechanism and the movable plate are The girder for building a tunnel lining according to claim 1, which constitutes the width dimension changing mechanism.