JPH11166393A - Concrete injection port block plug of tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compress and deform the plug body of a block plug so as to be pressed onto the inner surface of a concrete injection port and firmly mount the block plug by inserting a fastening bolt device to the plug body center part of the blocking plug made of an elastic body. SOLUTION: When a block plug (b) having a plug body 10 formed of an elastic body is inserted into a concrete injection port 5 after injecting concrete, and both side contact pieces of a locking plate 16 are touched to the inner surface of a tunnel segment 4, the outer part is protruded outward from the injection port 5. A fastening bolt 18 is inserted to the center holes of the locking plate 16, an inner washer 15, the plug body 10 and an outer washer 11, and screwed to a nut 13. When the fastening bolt 18 of the block plug (b) is fastened, the inner washer 15 and the outer washer 11 are compressed, whereby the plug body 10 is expanded and deformed in all directions, and pressed onto the inner surface of the injection port 5, and the outward protruding part is swollen from the injection port 5. Thus, the block plug (b) is firmly mounted by the pressing of the plug body 10 to the inner surface of the injection port 5 and the catching of the swollen body 19 by the tunnel segment even if a pressure is added from the concrete successively injected through the upper concrete injection port 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug for a concrete injection hole of a tunnel for closing a concrete injection hole of a tunnel segment.

[0002]

2. Description of the Related Art A conventional plug for a concrete pouring hole of a tunnel of this type is made of wood or rubber. In the concrete pouring operation of a tunnel, when concrete is poured to a predetermined height from a concrete pouring hole at a lower portion. A plug is inserted into the concrete injection hole, and concrete is sequentially injected from the upper concrete injection hole, and concrete is injected by inserting the plug into the concrete injection hole.

[0003] Therefore, since the plug of the concrete pouring hole of the tunnel is fixed only by friction with the inner surface of the concrete pouring hole, when the concrete is sequentially injected from the upper concrete pouring hole. ,
There is a risk that the lower stopper plug that was previously driven in will be pushed out by the pressure of the concrete and fall out.

[0004]

The plug of the concrete injection hole of the tunnel is easily operated and firmly fixed to the concrete injection hole, and the plug is pulled out even if the plug is pushed by the pressure of the injected concrete. The point is to surely prevent this.

[0005]

Means for Solving the Problems A plug body of an obturator plug for a concrete injection hole of a tunnel is made of an elastic body, and a tightening bolt device is inserted through a center portion of the obturator plug, and is provided by the tightening bolt device. The elastic plug body is squeezed and deformed to be pressed against the inner surface of the concrete pouring hole and to form a bulging body that is caught. An object of the present invention is to provide a plug for a concrete injection hole of a tunnel, which reliably prevents the plug from coming out even when pressed.

That is, an outer washer with a nut is provided on an outer end face of an elastic plug body which is fitted into a concrete injection hole of a tunnel segment and protrudes outward, and an inner washer and the above-mentioned tunnel are provided on an inner end face. A locking plate to be applied to the inner surface of the segment is arranged, and a tightening bolt is inserted from the inside into the center hole of the locking plate, the inner washer, the plug body, and the outer washer. The concrete plug of the concrete injection hole is constructed, and the plug of the concrete injection hole of the tunnel is easily operated and firmly fixed to the concrete injection hole. In order to reliably prevent the falling out of the plug body, washers are respectively applied to the inner and outer end faces of the plug body made of an elastic body, and the plug body is deformed by being pressed by bolts and nuts inserted into the center holes thereof, and the tunnel is deformed. With pressure bonding to the inner surface of the concrete injection hole of it was achieved by swelling the outside of the concrete casting hole.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the present invention, and the structure will be described with reference to the drawings. (1) is ground and (2) is assembled in a circular tunnel in a circular tunnel excavated on the ground (1). This is the primary lining segment.

[0008] (a) shows the inner mold that is assembled annularly inside the primary lining segment (2), (3) is the inner mold (a)
In this annular body, several tunnel segments (4) are assembled and constructed, and a concrete pouring hole (5) is provided at a required portion of the tunnel segment (4). (6)
And (7) are the main reinforcing bars and the distribution bars attached to the outer side of the annular body (3) by the assembling bars (8), and (9) is the annular shape of the primary lining segment (2) and the inner formwork (a). Concrete injected from the concrete injection hole (5) into the space between the main bodies (3).

(B) shows an obstruction plug for the concrete pouring hole (5) of the tunnel segment (4), and (10) shows a main body of the obstruction plug (b), which is made of an elastic material such as rubber or elastic plastic. Is formed into a cylindrical shape having a diameter slightly smaller than the inside diameter of the concrete injection hole (5). (11) is the outer washer,
On the inner side of the outer washer (11), several claws (12) are formed at appropriate intervals to bite into the plug body (10), and a nut (13) is welded to the center of the outer surface (14). I do. (15) is an inner washer, and (16) is a locking plate, which is formed by pushing a central portion of a strip-shaped iron plate outward in a trapezoidal shape, and forming contact pieces (17) on both sides. (18) is a fastening bolt.

Then, as shown in FIG. 5, the plug body (10)
Outer washer (11) with nut (13) on the outer end face of
An inner washer (15) and a locking plate (16) are sequentially applied to the inner end surface, respectively, and a tightening bolt (18) is applied from the inner side to the locking plate (1).
6), the inner washer (15), the plug body (10), and the outer washer (11) are inserted into the central holes and screwed through the nut (13) to form the closing plug (b).

(19) is the plug body (10) of the plug (b).
(20) is a mortar that fills an inner space of the concrete injection hole (5) after the plug (b) is attached after the plug body (10) is generated by the pinching pressure. It is.

The operation will be described. Concrete (9) is first injected into the space between the primary lining segment (2) and the annular body (3) of the inner formwork (a) from the lower concrete injection hole (5).

When the concrete (9) has been poured to a predetermined height from the concrete pouring hole (5) at the bottom thereof,
As shown in FIG. 5, an obturator plug (b) is inserted into the concrete injection hole (5) from the inside, and both-side contact pieces (17) of the locking plate (16) of the obturator plug (b) are used for tunneling. Apply to the inward side of segment (4). Then, the outside of the plug (b) protrudes outward from the concrete injection hole (5).

Thereafter, a wrench or the like is engaged with the head of the tightening bolt (18) of the obstruction plug (b), and the tightening bolt (1) is engaged.
When 8) is rotated, the plug body (10) of the plug (b) is sandwiched between the inner washer (15) and the outer washer (11) and expands and deforms in four directions as shown in FIG. The portion of the plug body (10) located in the concrete pouring hole (5) is pressed against the inner surface of the concrete pouring hole (5), and the outwardly protruding portion bulges (19) from the concrete pouring hole (5).

After the lower plug (b) is attached, concrete (9) is poured from the upper concrete pouring hole (5), and then the plug (5) is inserted into the concrete pouring hole (5). b) is mounted and operated in the same manner as described above to complete the concrete (9) pouring operation.

Thus, even if the plug (b) such as the lower part is pushed by the pressure of the concrete (9) which is sequentially injected from the concrete injection hole (5) at the upper part, the plug body of the plug (b) can be used. (10) crimping with the inner surface of the concrete injection hole (5),
And the swelling body (19) is firmly fixed to the tunnel segment (4) by being hooked on the tunnel segment (4) and does not come out of the concrete injection hole (5).

On the other hand, after the work is completed, as shown in FIG. 2, both sides of the stopper plate (16) of the plug (b) are cut off and removed, and the inside of the concrete pouring hole (5) is left inside. The mortar (20) is filled to fill the hole.

[0018]

The obstruction plug for a concrete injection hole of a tunnel according to the present invention has the following advantages.

(1) A plug main body of an obstruction plug is made of an elastic body, and an outer washer with a nut is provided on an outer end surface of the plug main body.
An inner washer and a locking plate are respectively applied to the inner end surface, and a tightening bolt is inserted through the center hole of the locking plate, the inner washer, the plug body, and the outer washer and screwed into the nut. Therefore,

(A) When inserting the plug into the concrete pouring hole of the tunnel segment of the tunnel, if the locking plate of the plug is brought into contact with the inner surface of the tunnel segment, the plug will have a concrete outer surface. Since it is inserted in a certain state protruding from the injection hole in a predetermined manner, it is possible to easily insert the plug into the concrete injection hole of the tunnel segment and always perform it in a predetermined manner. Improve efficiency.

(B) When installing the obstruction plug, it is only necessary to insert the obstruction plug into the concrete injection hole of the tunnel segment of the tunnel and to rotate the head of the tightening bolt. And easy to work.

(C) By tightening the bolts of the plug, the plug body is sandwiched between the inner and outer washers and expands and deforms in all directions, and the portion of the plug body located in the concrete pouring hole is removed. The plug is pressed against the inner surface of the concrete injection hole and the outwardly protruding portion swells out of the concrete injection hole. Of the plug body, and the bulging body outside the plug body is prevented from being pulled out by being hooked on the tunnel segment, so that the obstruction plug can always be securely attached firmly.

(2) It can be easily constructed and easily manufactured at low cost, and its operation is light and smooth.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a tunnel to which a plug for a concrete injection hole according to an embodiment of the present invention is attached.

FIG. 2 is an enlarged front sectional view of a main part of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a perspective view of the obturator.

FIG. 5 is a front cross-sectional view showing a state where the plug is inserted into a concrete injection hole of a tunnel segment of the tunnel.

FIG. 6 is a front sectional view showing a state in which the plug is fixed to a concrete pouring hole.

[Explanation of symbols]

 a Inner form b Closure plug 1 Ground 2 Primary lining segment 3 Toroidal body 4 Tunnel segment 5 Concrete pouring hole 6 Main reinforcement 7 Distributor 8 Assembling reinforcement 9 Concrete 10 Plug body 11 Outer washer 12 Claw 13 Nut 14 Welding 15 Inner washer 16 Locking plate 17 Patch 18 Tightening bolt 19 Bulging body 20 Mortar

Claims (1)

[Claims] 1. An outer washer with a nut on an outer end face of an elastic plug body which fits into a concrete injection hole of a tunnel segment and protrudes outward, and an inner washer and an inner washer are provided on an inner end face. The locking plate is placed on the inner surface of the segment, and the tightening bolt is inserted from the inside into the center hole of the locking plate, inner washer, plug body and outer washer and screwed into the nut. An obturator plug for a concrete injection hole of a tunnel, characterized by: