JP2003239692A - Mounting structure of fire-resisting plate onto tunnel- lining internal surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and surely install and support a fire-resisting plate laid on the internal surface of a tunnel lining as the fire-resistive countermeasure of a tunnel. <P>SOLUTION: An engaging hook 4 is engaged and held to a supporting plate 1 installed on the internal surface of the tunnel lining F, and the fire-resisting plate 3 is secured and supported to the engaging hook 4 by a mounting bolt 5 and a nut 6. A combustible or heat-fusing packing 8 is interposed between the head section 5a of the mounting bolt 5 and the fire-resisting plate 3 as required. A down-stepped section 5c is formed to the mounting bolt 5 as required. A through-hole 3a in which the engaging hook 4 and the bolt 5 and the nut 6 can be inserted is formed to the fire-resisting plate 3 while it is desirable that the inside of the through-hole 3a is filled with fire-resistive fillers 9. It is preferable that a fire-resistive sealing material is interposed on the tunnel-lining side between the adjacent fire-resisting plates 3 and 3 as required. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a fireproof plate laid on the inner surface of a tunnel lining as a fireproof measure for a tunnel.

[0002]

2. Description of the Related Art In recent tunnels, fireproof measures are required to prevent deterioration or damage of the tunnel lining due to fire, and the inside of the tunnel lining made of lining concrete or lining segment is covered with metal. It has been proposed to install refractory plates such as plates.

As a method of attaching the fireproof plate to the inner surface of the tunnel lining, so-called direct tension is generally used. For example, an anchor insertion formed on the inner surface of the tunnel lining corresponding to an attachment hole formed in the fireproof plate. A post-installed anchor is placed in the hole and a fireproof plate is attached to the anchor with mounting bolts. Alternatively, inserts and studs are embedded in advance on the inner surface of the tunnel lining, and a fireproof plate is attached to them by mounting bolts.

However, it is difficult to accurately provide the anchor insertion hole as described above at a predetermined position, and the inflexible fireproof plate cannot follow the unevenness or the curve of the inner surface of the lining. It is difficult to align with the mounting hole of.
Further, since the inserts and studs are embedded in the lining at predetermined positions in advance, their positions cannot be changed. In particular, in shield tunnels, segments are used, and since inserts and studs are buried when manufacturing the segments in the factory, it is almost impossible to change the position on site,
It is quite difficult or impossible to attach the fireproof plate to the predetermined position in many cases.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and provides a fireproof plate mounting structure capable of easily and reliably mounting and supporting a fireproof plate on the inner surface of a tunnel lining. The purpose is to

[0006]

In order to achieve the above object, the structure for attaching the fireproof plate to the inner surface of the tunnel lining according to the present invention is as follows. That is, the retaining plate is attached to and supported by the support plate attached to the inner surface of the tunnel lining, and the fireproof plate is attached and supported by the attaching bolt and the nut on the engaging hook.

A flammable or heat-meltable packing is interposed between the head of the mounting bolt and the fireproof plate, if necessary. Moreover, the above-mentioned mounting bolts are provided with paragraphs as needed. Further, it is preferable that a through hole through which the locking hook and the bolt / nut are inserted is formed in the fireproof plate, and that a fireproof filler is filled in the through hole. Also, on the side of the tunnel lining between adjacent fireproof plates,
A fireproof sealant may be interposed if necessary.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below based on the embodiments shown in the drawings. 1 (a) is a front view showing an embodiment of a structure for mounting a fireproof plate on the inner surface of a tunnel lining according to the present invention, FIG. 1 (b) is a vertical side view thereof, and FIG. 2 is a partially enlarged vertical side view thereof. 3 is an enlarged vertical side view of a part thereof.

In the figure, reference numeral 1 denotes a support plate disposed on the inner surface of the tunnel lining F. The support plate 1 is formed of a metal plate or the like in the shape of a long strip having a bent portion 1a having an approximately U-shaped cross section at its upper portion. The longitudinal direction thereof is arranged substantially parallel to the longitudinal direction of the tunnel, and a plurality of them are arranged at predetermined intervals in the circumferential direction of the tunnel.

Each of the support plates 1 is attached to the inner surface of the tunnel lining F with fixtures 2 at a plurality of positions in the longitudinal direction. As the fixture 2, in this embodiment, it is embedded in the lining F in advance. Cylindrical insert 21 and a bolt 22 screwed into a female screw hole (not shown) of the insert 21
Etc. are used. In addition, as the fixture 2,
For example, a post-installed anchor is used, or any other suitable method.

On the inner surface of the tunnel lining F on which the support plate 1 is installed as described above, a plurality of (three in the figure) support plates 1 arranged in the circumferential direction are straddled to form a substantially flat plate. A fireproof plate 3 made of a ceramic is arranged, and a mounting bolt is attached to a locking hook 4 engaged with the bent portion 1a of the support plate 1 corresponding to a mounting hole 3a formed in the fireproof plate 3. The refractory plate 3 is attached and supported by the nut 5 and the nut 6. The nut 6 is integrally fixed to the locking hook 4 by welding or the like, and the mounting bolt 5 is screwed into the nut 6.

In the figure, 7 is a washer fitted to the mounting bolt 5, the washer 7 having a larger diameter than the mounting hole 3a of the fireproof plate 3, and the washer 7 on the fireproof plate 3 side. A packing 8 made of a combustible or heat-meltable material having substantially the same diameter is provided. A refractory filler 9 such as mortar is filled in the mounting hole 3a.

It should be noted that the locking hook 4 may be provided with a spring plate 10 for preventing it from coming off if necessary. In the present embodiment, the spring plate 10 is formed in a substantially L-shaped cross section as shown in FIG. Is integrally attached to the locking hook 4 by welding or the like, and the spring plate 1 is located inside the U-shaped curved portion of the locking hook 4.
In this configuration, a corrugated plate-shaped curved portion 10a is formed in the lower bent portion of 0.

When the locking hook 4 is engaged with the bent portion 1a of the support plate 1 from the state shown in FIG. 4A as shown in FIG. 4B, the bent portion 1a and the locking hook 4 are engaged. The curved portion 10a is sandwiched between and in a slightly compressed state, and the elastic hook (elastic restoring force) of the curved hook 10a locks the locking hook 4 to the support plate 1 so as not to slip.

Further, the mounting bolt 5 in the present embodiment.
A section 5c having a smaller diameter than the inner diameter of the nut 6 is formed near the tip of the male screw section 5b, and the axial length of the section 5c is equal to or longer than the axial length of the nut 6. Is formed longer than. In FIG. 2, 11 is a fire-resistant sealing material made of ceramic wool or the like, which is interposed on the tunnel lining F side of the abutting ends 3b of the adjacent fire-resistant plates 3 and 3. It is to prevent the flame and the like from entering the inner surface of the lining through the gap.

In the above construction, when the fireproof plate 3 is laid on the inner surface of the tunnel lining F, the support plate 1 is previously attached to the inner surface of the lining F by the fixing tool 2 as shown in FIG. The plate 3 is mounted and supported. First, as shown in FIGS. 5A and 6, the mounting bolt 5 is inserted into the central holes 7a and 8a of the washer 7 and the packing 8,
After inserting the nut 6 and the locking hook 4 into the mounting hole 3a formed in the fireproof plate 3 in a state where the tip portion thereof is screwed into the nut 6 fixed to the locking hook 4, FIG. As described above, the locking hook 4 is hooked on the bent portion 1a of the support plate 1 to be engaged and held. that time,
If the mounting hole 3a formed in the fireproof plate 3 is a through hole through which the locking hook 4 and the nut 6 can be inserted as shown in the figure,
With the nut 6 pre-screwed in the mounting bolt 5 via the washer 7, packing 8 and locking hook 4, the locking hook 4 is engaged with and held by the support plate 1 only by the work from the surface side of the fireproof plate 3. Therefore, the workability is extremely good. Further, when the retaining hook 4 is provided with the spring plate 10 for retaining as described above, it is possible to prevent the retaining hook 4 from accidentally falling off from the bent portion 1a and rattling.

Then, after a refractory filling material such as mortar is filled into the mounting hole 3a of the fireproof plate 3 through a hose or the like not shown in the drawing, the mounting bolt 5 is further screwed into the nut 6 to form the above-mentioned figure. 3, the washer 7 and the packing 8 are pressed against the inner surface of the fireproof plate 3, and the fireproof plate 3 is clamped and fixed between the head 5a of the mounting bolt 5 and the support plate 1.

As described above, by using the locking hooks 4 that engage with the support plate 1 and the bolts 5 and the nuts 6 for mounting the fireproof plate 3 on the locking hooks 4,
It is possible to omit the conventional troublesome positioning work, and to easily and securely attach and support the fireproof plate 3 at a predetermined position. That is, the locking hook 4 can be slid with respect to the bent portion 1a of the support plate 1 fixed to the inner surface of the lining F, and the mounting bolt 5 is radially moved by the diameter of the mounting hole 3a. It can be moved, and the tightening degree of the fireproof plate 3 can be adjusted by adjusting the screwing amount of the mounting bolt 5 into the nut 6, so that the fixing work while aligning can be performed easily and quickly. Is.

The mounting bolt 5 should preferably be provided with the paragraph 5c as described above. By doing so, for example, even if the bolt 5 is loosened from the state where the fireproof plate 3 is mounted as shown in FIG. As shown in FIG. 8, the nut 6 is engaged with the above-mentioned section 5c and is retained and locked in that state, and the mounting bolt 5 and the nut 6 are artificially aligned and the bolt is not rotated. As long as the bolt 5 and the fireproof plate 3 are not accidentally dropped. The mounting bolt 5 can be easily and inexpensively manufactured by simply processing the existing parts with the paragraphs 5c, and does not require additional components or the like.

The fire-resistant plate 3 has a head 5a of the mounting bolt 5.
Between the bolt head 5a and the nut 6, and especially on the inner surface side (tunnel space side) of the fireproof plate 3 with a packing 8 made of a flammable or heat-meltable material. You should let me. As the packing, paper, synthetic resin or rubber, particularly organic type is preferable.

In this embodiment, a washer 7 is provided on the head 5a side of the mounting bolt 5, and the fireproof plate 3 of the washer 7 is provided.
Although the packing 8 is provided on the side, the bolt head 5a is attached to the fireproof plate 3
It may be formed to have a diameter larger than that of the mounting hole 3a, or a flange portion may be formed on the bolt head 5a, and the packing 8 may be provided on the bolt head 5a or the fireproof plate 3 side of the flange portion.

In the above embodiment, the nut 6 is attached to the locking hook 4 and the mounting bolt 5 is screwed into the nut 6, but the bolt 5 is attached to the locking hook 4 and the nut 6 is attached to the bolt 5. It may be screwed. In that case, the packing 8 and, if necessary, the washer 7 may be provided on the nut side.

When the packing 8 made of a flammable or heat-fusible material is interposed between the bolt head 5a and the nut 6 as described above, the packing 8 melts or disappears when a fire occurs, and the fireproof plate 3 is attached. Play occurs in the part. As a result, even if the fireproof plate 3, the support plate 1, the bolts 5, the nuts 6, etc. are thermally expanded, an unreasonable force does not act on the mounting portion of the fireproof plate 3 due to the difference in expansion, etc. It can be prevented from being deformed or damaged. In particular,
If a ceramic refractory plate 3 is used,
The fireproof plate 3 can be prevented from being cracked by heat.

[0024]

As described in detail above, the structure for attaching the fireproof plate to the inner surface of the tunnel lining according to the present invention has the above-mentioned structure, so that the following effects can be obtained. (1) Cumbersome positioning (hole matching) as in the conventional case
There is no need for such things, and even if the inner surface of the lining is uneven or curved, the fireproof plate can be easily and surely attached. (2) For example, even if the inner surface of the tunnel lining is slightly deformed due to an earthquake, the support plate 1 and the like are deformed and absorb the deformation, so that the followability is high and the earthquake resistance is excellent. (3) Work efficiency is high because the mounting method is easy. (4) It is possible to cope without limiting the material and type of the fireproof plate.

[Brief description of drawings]

FIG. 1A is a front view showing an embodiment of a fireproof plate mounting structure according to the present invention. (B) is a vertical sectional side view.

FIG. 2 is an enlarged vertical sectional side view of a part of the refractory plate mounting structure.

FIG. 3 is a partial vertical cross-sectional side view in which the fireproof plate mounting structure is further enlarged.

FIG. 4A is an enlarged view of a locking hook and a spring plate.
(B) The same figure as the state where it was made to engage with a support plate.

FIG. 5A is an exploded perspective view of a main part of the refractory plate mounting structure. (B) The same figure in an assembled state.

FIG. 6 is an explanatory diagram of an assembling procedure of the fireproof plate mounting structure.

FIG. 7 is an explanatory view of an assembling procedure of the fireproof plate mounting structure.

FIG. 8 is a vertical cross-sectional side view of the fireproof plate mounting structure with bolts loosened.

[Explanation of symbols]

1 Support plate 2 fixtures 3 Fire plate 3a Mounting hole 4 locking hook 5 mounting bolts 5a head 5b Male thread 5c paragraph and division 6 nuts 7 washers 8 packing 9 Filling material 10 spring plate 11 Seal material F tunnel lining

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Ichiro Iwatani             2-5-10 Shiba, Minato-ku, Tokyo K Corporation             In F sea F-term (reference) 2D055 GC09 LA17

Claims (5)

[Claims] 1. A tunnel lining characterized in that a retaining hook is engaged with and held by a support plate attached to an inner surface of the tunnel lining, and a fireproof plate is attached to and supported by the retaining hook with a mounting bolt and a nut. Fireproof plate mounting structure on the inner surface. 2. A flammable or heat-meltable packing is interposed between the head of the mounting bolt and the fireproof plate.
Fireproof plate mounting structure on the inner surface of the tunnel. 3. The structure for mounting a fireproof plate on an inner surface of a tunnel according to claim 1, wherein the mounting bolt is provided with a paragraph. 4. A refractory plate is formed with a through hole through which the locking hook and the bolt / nut can be inserted, and a fire resistant filler is filled in the through hole.
The fireproof plate mounting structure on the inner surface of the tunnel according to any one of 1. 5. The structure for attaching a fireproof plate to an inner surface of a tunnel according to claim 1, wherein a fireproof sealant is interposed on a tunnel lining side between adjacent fireproof plates.