JP2562778B2 - Filling method for filling recesses for accommodating joint members of segments - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment used for lining a shield tunnel, and more particularly, to a method for filling a joint member accommodating recess used for assembling the segment with a hole.

[0002]

2. Description of the Related Art As shown in a partial perspective view of an assembled segment pit in FIG. 1 and a partial perspective view of a segment in FIG. 2, in the shield construction method, a large number of segments 1 divided into rings are The tail part of the shield machine is assembled in sequence. As the segment 1, for example, one made of reinforced concrete is used, and the inner peripheral surface 1A of the segment 1 is used.
Two joint member housing recesses 3 (joint boxes) are formed at the edges of each of the four sides. Further, a steel joint plate 7 in which a bolt insertion hole 5 is formed is exposed at an outer portion of each recess 3. Assembly of segment 1
Bolts 11 and nuts 13 in which the joint plates 7 of the segments 1 adjacent to each other are butted and the bolt insertion holes 5 of these joint plates 7 are inserted as shown in the sectional front view in FIG.
Is performed by tightening and fixing both joint plates 7.

The joint plate 7 and the joint members such as the bolts 11 and the nuts 13 thus assembled in the recess 3 need to be subjected to some measures from the viewpoint of rust prevention. Thus, the recess 3 is filled in and filled. On the other hand, when hard urethane foam is used, it is necessary to cover the urethane surface with a non-combustible material from the viewpoint of fire resistance, although the hard urethane is flame-retardant.

Therefore, when filling the concave portion 3 with hard urethane foam, the urethane is injected and foamed.
The surface of the foam is cut smooth, then a primer is applied, and then the surface is finished with mortar.

[0005]

However, in such a method, considerable labor and time are required for the work of cutting urethane, the work of applying a primer, and the work of finishing the applied primer with mortar to be smooth. , There is a problem that work efficiency cannot be improved. In order to save the work of cutting urethane, a wooden or plastic formwork is applied to the surface of the concave portion 3 to fix it, and then urethane is injected into the concave portion 3. This method is also used. Also requires the work of applying the primer and the work of smoothing the applied primer on the surface with mortar, as well as the step of applying and fixing the formwork, which requires considerable effort and time as described above. I need
There is a problem that work efficiency cannot be improved. The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a method capable of easily and reliably filling and filling a recess for receiving a joint member of a segment.

[0006]

To achieve the above object, according to the present invention, after a large number of segments in which a recess for receiving a joint member is formed are connected and assembled by a joint member arranged in the recess. A method of filling the inside of the recess with a filling material, which has an injection hole and an air vent hole at a portion of the inner peripheral surface of the segment where the recess is opened, and has good adhesiveness with a foamable material and is a non-combustible material. A step of closing the opening of the lid plate made of mortar by aligning the inclined surface of the edge portion of the lid plate with the inclined surface of the edge portion of the recess and adhering both inclined surfaces with an adhesive; A step of injecting a foamable material into the recess from the injection hole of the plate to foam in the recess, filling the recess with a hole; and filling the injection hole and the air vent hole with a non-combustible material. Is characterized by.

According to the present invention as described above, a mortar cover plate and an adhesive are used to close the joint member accommodating recess, and the inclined surface of the edge of the cover plate is inclined at the edge of the recess. By adhering to the surface, the joint member accommodating recess can be easily closed. Next, since the concave portion is filled with the foamable material and the foamable material is used as the member for filling the concave portion, the filling property is good as compared with the case of filling with the mortar, and this filling work is also performed efficiently. Since it has a good filling property, it is also advantageous in enhancing the rust prevention effect. In this case, since the adhesiveness between the cover plate made of mortar and the foaming material is good, a primer is unnecessary. Furthermore, although the foamable material is flame retardant,
From the viewpoint of fire protection, it is necessary to cover the surface with a non-combustible material, but in the present invention, the cover plate made of mortar bonded to the segment plays this role. Therefore, as in the past, the work of cutting urethane, the work of applying a primer, the work of smoothing the surface of the primer with mortar, or
It is possible to omit troublesome work such as applying and fixing a wooden or plastic formwork, which is extremely advantageous in saving labor, shortening the construction period, and reducing costs. Further, after the foaming is completed, the injection hole and the air vent hole are filled with mortar to be closed, and this closing operation is also easy because the injection hole and the air vent hole are small. Therefore, according to the present invention, it becomes possible to easily and reliably fill and fill the large number of joint member accommodating recesses of the segments forming the segment pit.

[0008]

EXAMPLES The method of filling holes according to the present invention will be described below together with the cover plate. First, as shown in FIG. 3, the joint plates 7 of the segments 1 adjacent to each other are butted, and both joint plates 7 are tightened and fixed by the bolts 11 and the nuts 13 which are inserted through the bolt insertion holes 5 of the joint plates 7. , Assemble segment 1.

After the segment 1 is assembled, as shown in FIG. 4, the portion where the recess 3 is opened on the inner peripheral surface 1A side of the segment 1 is closed by the cover plate 15. 9 shows a plan view of the lid plate, and FIG. 10 shows a front view of the lid plate. In this embodiment,
One cover plate 15 is provided in each of the adjacent recesses 3.
The lid plate 15 is made of a non-combustible material that has good adhesiveness to the foaming material, and in the embodiment, is made of a mortar-based plate such as a mortar plate. The cover plate 15 has the recess 3
Is formed in a size corresponding to
And an air vent hole 19 is formed. Also, the joint plate 7
An inclined surface 15A corresponding to the inclined surface of the edge portion of the recess 3 is formed on the remaining three sides excluding the portion abutted on the.
The lid plate 15 having such a configuration is fitted to the recess 3 and
Pre-made at the factory. Closure of the concave portion 3 by the cover plate 15 is performed by joining the inclined surfaces 15A of the three sides and the inclined surface of the edge portion of the concave portion 3 with the adhesive 21.

After closing the concave portion 3 with the cover plate 15, FIG.
As shown in FIG.
3 is injected, and the inside of the recess 3 is foamed to fill the inside of the recess 3 with holes. In this case, urethane 23 from the air vent hole 19
Check while checking the filling status. As the urethane 23, for example, a foam having a foaming property of several times to 30 times and a reaction time of about 2 seconds to 2 minutes is used. At the time of foaming, the air in the recess 3 is recessed through the air vent hole 19 3 is discharged to the outside. After the foaming is completed, as shown in FIG. 6, a mortar 25 is embedded in the injection hole 17 and the air vent hole 19 to close the mortar 25, and the work is completed. 7 shows a side view of the same section in FIG.

According to this embodiment, since the concave portion 3 is closed by the lid plate 15 when the urethane 23 is foamed, the filling property of the urethane 23 is improved, and the urethane 23 is filled with mortar as compared with the case where the urethane 23 is filled. Since it has a good filling property, it is advantageous in enhancing the rust prevention effect. Also, the lid plate 15 and the urethane 2
Since the adhesiveness with 3 is also good, a primer is unnecessary,
Eliminates the troublesome work of cutting urethane, applying a primer, finishing the surface of the primer with mortar to a smooth surface, or attaching and fixing a wooden or plastic formwork as in the past. This is advantageous in saving labor. Although the urethane 23 is flame-retardant, it is necessary to cover its surface with a non-combustible material from the viewpoint of fire protection, and in this embodiment, the cover plate 15 bonded to the segment 1 plays this role.

The lid plate 15 may have various shapes corresponding to the shape of the recessed portion 3, and the joint member may be made of
It is not limited to the joint plate 7, the bolt 11, the nut 13 and the like as in the embodiment, but may be any. Furthermore, in the embodiment, the case where the air vent hole 19 is formed in the cover plate 15 has been described.
Since air escapes from a slight gap or the like between the cover plate 15 and the joint plate 7, the air vent hole 19 can be omitted. The filling of the injection hole 17 and the air vent hole 19 may be performed by preparing plug plugs having shapes corresponding to these holes 17 and 19 in advance and inserting the plug plugs.

[0013]

As is apparent from the above description, the present invention is
A large number of segments in which the joint member accommodating recess is formed,
A method of filling and filling the inside of the recess after connecting and assembling with a joint member arranged in the recess, wherein an injection hole and an air vent hole are formed in a portion of the inner peripheral surface of the segment where the recess is opened. A lid plate made of mortar, which has a good adhesiveness with the foamable material and is a non-combustible material, and aligns the inclined surface of the edge of the lid plate with the inclined surface of the edge of the recess to attach the adhesive to both inclined surfaces. A step of closing the opening by bonding using, a step of injecting a foamable material into the concave portion through an injection hole of the lid plate to cause foaming in the concave portion, and filling and filling the concave portion; Since the hole and the air vent hole are filled with a non-combustible material, it is possible to fill the joint member accommodating recess of the segment easily and reliably.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a segment pit.

FIG. 2 is a partial perspective view of a segment.

FIG. 3 is a cross-sectional front view of a joint member accommodating recess portion of the assembled segment.

FIG. 4 is a cross-sectional front view of essential parts in a state where a cover plate is attached to a joint member accommodating recess.

FIG. 5 is a cross-sectional front view of essential parts in a state where hard urethane foam is injected and foamed after the cover plate is attached to the joint member accommodating recess.

FIG. 6 is a cross-sectional front view of a main part of a state where the injection hole and the air vent hole are closed after foaming hard urethane foam.

FIG. 7 is a sectional front view of a segment portion in which a concave portion is filled with hard urethane foam.

FIG. 8 is a cross-sectional side view of a segment portion in a state where a concave portion is filled and filled with hard urethane foam.

FIG. 9 is a plan view of a cover plate.

FIG. 10 is a front view of a cover plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 segment 3 joint member accommodating recess 7 joint plate 11 bolt 13 nut 15 cover plate 17 injection hole 19 air vent hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiko Seto 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Inventor Shoji 1-10 Natsumi Funabashi, Chiba Prefecture Tokyo Electric Power Co., Inc. In-company (72) Inventor Hiroaki Osawa 1-1-10 Natsumi, Funabashi-shi, Chiba Tokyo Electric Power Co., Inc. (56) Reference JP-A-3-260296 (JP, A) Sankaihei 3-89793 (JP, U)

Claims (1)

(57) [Claims] 1. A method for filling a large number of segments, each of which is formed with a joint member accommodating recess, with a joint member arranged in the recess and then assembling the interior of the recess. said recesses are open portion at the inner circumferential surface, Note
The mortar-made cover plate adhesion foamed material is well and noncombustible material and having an entry apertures and the air vent hole, the
Align the inclined surface of the edge of the lid plate with the inclined surface of the edge of the recess
A step of closing the opening by adhering the inclined surface of the plate with an adhesive, and a foaming material is injected into the recess from the injection hole of the lid plate to foam in the recess, and the recess is filled up. Filling process and filling the injection hole and air vent hole with non-combustible material
A method for filling a hole in a recess for accommodating a joint member of a segment, the method comprising: