JP5559413B1 - Fireproof structure of flexible joints for underground structures - Google Patents
Fireproof structure of flexible joints for underground structures Download PDFInfo
- Publication number
- JP5559413B1 JP5559413B1 JP2013232841A JP2013232841A JP5559413B1 JP 5559413 B1 JP5559413 B1 JP 5559413B1 JP 2013232841 A JP2013232841 A JP 2013232841A JP 2013232841 A JP2013232841 A JP 2013232841A JP 5559413 B1 JP5559413 B1 JP 5559413B1
- Authority
- JP
- Japan
- Prior art keywords
- refractory material
- underground structure
- fireproof
- underground
- tunnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
【課題】地下構造物に設置される可撓継手の耐火構造を構成する耐火材の設置作業を容易にすると共に、耐火材の耐火性能を長期間にわたって維持する。
【解決手段】可撓継手１の耐火構造１０は第１耐火材１１及び第２耐火材１２を備える。第１耐火材１１は、止水部材５よりトンネル径方向内側における覆工体３、３’の端面３ａ、３ｂ間に介装されている。第１耐火材１１は、シート状の無機繊維を交互に折り曲げて形成したアコーディオン状のブロック体により構成されており、シート状の無機繊維がトンネル軸方向にアコーディオン状に積層されている。第２耐火材１２は、第１耐火材１１よりトンネル径方向内側における覆工体３、３’の端面３ａ、３ｂの間に配置されている。第２耐火材１２はシート状の無機繊維により構成されており、その中央部がトンネル径方向内側に向けて弛んでいる。
【選択図】図１An object of the present invention is to facilitate installation work of a refractory material constituting a refractory structure of a flexible joint installed in an underground structure, and to maintain the fire resistance performance of the refractory material over a long period of time.
A fireproof structure of a flexible joint includes a first fireproof material and a second fireproof material. The first refractory material 11 is interposed between the end faces 3 a and 3 b of the covering bodies 3 and 3 ′ on the inner side in the tunnel radial direction from the water blocking member 5. The first refractory material 11 is composed of an accordion-like block body formed by alternately bending sheet-like inorganic fibers, and the sheet-like inorganic fibers are laminated in an accordion shape in the tunnel axis direction. The 2nd refractory material 12 is arrange | positioned between the end surfaces 3a and 3b of the covering bodies 3 and 3 'in the tunnel radial direction inner side from the 1st refractory material 11. FIG. The 2nd refractory material 12 is comprised with the sheet-like inorganic fiber, The center part has loosened toward the tunnel radial direction inner side.
[Selection] Figure 1
Description
本発明は、地下構造物に設置される可撓継手の耐火構造に関する。 The present invention relates to a fireproof structure for a flexible joint installed in an underground structure.
上下水道、共同溝、道路、鉄道などの管路として用いられるシールドトンネルは、シールド工法により形成される。
シールド工法では、例えば、地山に発進立坑と到達立坑とを構築し、発進立坑から到達立坑へ向けてシールド掘進機で地山を掘削しながら、シールド掘進機の後部で次々にセグメントをトンネル周方向に組み立ててセグメントリングを構築すると共に、隣接するセグメントリング同士をトンネル軸方向で連結することで筒状の覆工体を構築する。
Shield tunnels used as pipelines for water and sewage systems, common grooves, roads, railways, etc. are formed by a shield method.
In the shield method, for example, a start-up shaft and a reaching shaft are built in the ground, and the segments are tunneled around the tunnel one after another while excavating the ground with the shield machine from the start shaft to the arrival shaft. A segment ring is constructed by assembling in the direction, and a cylindrical lining body is constructed by connecting adjacent segment rings in the tunnel axis direction.
また、シールドトンネルでは、地震や地盤の不等沈下などによる変位や応力を吸収するために、その途中部に、可撓継手が設置され得る。
可撓継手は、例えば、接続される覆工体同士の対向する端面にそれぞれ設けられて覆工体の周方向に連続する一対の継手枠体と、継手枠体間を跨ぐように継手枠体に設けられて覆工体の周方向に連続する可撓性の止水部材と、を含んで構成される。
このような可撓継手は特許文献１に開示されている。
In the shield tunnel, a flexible joint may be installed in the middle of the tunnel to absorb displacement and stress due to earthquakes and uneven settlement of the ground.
The flexible joint is, for example, a pair of joint frames that are provided on opposite end faces of the connected covering bodies and are continuous in the circumferential direction of the covering body, and the joint frame body so as to straddle between the joint frames. And a flexible water-stopping member that is continuous with the circumferential direction of the covering body.
Such a flexible joint is disclosed in Patent Document 1.
ところで、このような可撓継手が設置されたシールドトンネル内にて火災が発生した場合に、可撓継手を構成する止水部材が燃焼して焼け落ちることなどを防止するために、可撓継手は、止水部材よりトンネル内側に耐火構造を備えることが多い。
この点、特許文献１では、止水部材よりトンネル内側における継手枠体間に、耐火構造として、シート状の耐火材を二重に設けている。また特許文献１では、各耐火材が、トンネルの内側又は外側に膨出する変形許容屈曲部を有している。
By the way, when a fire occurs in a shield tunnel where such a flexible joint is installed, in order to prevent the water stop member constituting the flexible joint from burning and burning off, the flexible joint is provided. Often has a fireproof structure inside the tunnel than the water stop member.
In this respect, in Patent Document 1, a sheet-like refractory material is doubled as a refractory structure between the joint frames inside the tunnel from the water stop member. Moreover, in patent document 1, each refractory material has a deformation | transformation tolerance bending part which bulges in the inner side or the outer side of a tunnel.
しかしながら、特許文献１に記載のような可撓継手については、継手枠体を現地で覆工体に取り付けた後に耐火材を継手枠体に設置することが多い。それゆえ、耐火材の継手枠体への設置時には、前述の変形許容屈曲部を形成しつつ、耐火材を継手枠体に設置することになるので、当該設置作業に手間がかかっていた。
また、特許文献１に記載のようなシート状の耐火材は、その厚さが比較的薄いことにより、経時劣化によるヘタリや肉痩せが進行しやすいので、耐火性能を長期間にわたって維持することが難しかった。
However, for flexible joints such as that described in Patent Document 1, a refractory material is often installed on the joint frame after the joint frame is attached to the lining body on site. Therefore, when the refractory material is installed on the joint frame body, the refractory material is installed on the joint frame body while forming the above-described deformation-permissible bending portion, so that the installation work is troublesome.
In addition, since the sheet-like refractory material as described in Patent Document 1 is relatively thin, it is easy for stickiness and thinning due to deterioration over time to proceed, so that the fire resistance performance can be maintained over a long period of time. was difficult.
本発明は、このような実状に鑑み、前述の覆工体などの地下構造物に設置される可撓継手の耐火構造において、当該耐火構造を構成する耐火材の設置作業を容易にすること、及び、耐火材の耐火性能を長期間にわたって維持することを目的とする。 In view of such a situation, the present invention facilitates the installation work of the refractory material constituting the fireproof structure in the fireproof structure of the flexible joint installed in the underground structure such as the lining body described above. And it aims at maintaining the fireproof performance of a refractory material over a long period of time.
そのため本発明では、地下構造物用の可撓継手は、接続される地下構造物同士の対向する端面にそれぞれ設けられて地下構造物の周方向に連続する一対の継手枠体と、継手枠体間を跨ぐように継手枠体に設けられて地下構造物の周方向に連続する可撓性の止水部材と、を含んで構成される。地下構造物用の可撓継手の耐火構造は、止水部材より地下構造物の内側における地下構造物の端面間に介装される第１耐火材と、第１耐火材より地下構造物の内側における地下構造物の端面間に配置される第２耐火材と、を備える。第１耐火材は、シート状の無機繊維を交互に折り曲げて形成したアコーディオン状のブロック体により構成され、その両端部が、地下構造物の各端面にそれぞれ固定される。第２耐火材はシート状の無機繊維により構成され、その両端部が地下構造物の各端面にそれぞれ固定される。第１耐火材の密度は、第２耐火材の密度よりも高い。 Therefore, in the present invention, the flexible joint for the underground structure is provided with a pair of joint frames that are respectively provided on opposite end surfaces of the connected underground structures and are continuous in the circumferential direction of the underground structure, and the joint frame And a flexible water stop member that is provided in the joint frame so as to straddle the gap and is continuous in the circumferential direction of the underground structure. The fireproof structure of the flexible joint for the underground structure includes a first refractory material interposed between end faces of the underground structure inside the underground structure from the water blocking member, and an inner side of the underground structure from the first refractory material. And a second refractory material disposed between the end faces of the underground structure . The first refractory material is constituted by an accordion-like block body formed by alternately bending sheet-like inorganic fibers, and both end portions thereof are fixed to the respective end surfaces of the underground structure. A 2nd refractory material is comprised with a sheet-like inorganic fiber, and the both ends are each fixed to each end surface of an underground structure. The density of the first refractory material is higher than the density of the second refractory material.
本発明によれば、第１耐火材は、シート状の無機繊維を交互に折り曲げて形成したアコーディオン状のブロック体により構成される。これにより、第１耐火材を地下構造物間に設置するときに、前述のような変形許容屈曲部を形成することなく、ブロック体である第１耐火材を地下構造物間に嵌め込んで、第１耐火材の両端部を、地下構造物の各端面にそれぞれ固定すればよいので、第１耐火材を地下構造物間に簡単に設置することができる。
また本発明によれば、第１耐火材がアコーディオン状のブロック体により構成されることにより、第１耐火材は、地下構造物の径方向での厚さを十分に確保することができるので、経時劣化によるヘタリや肉痩せの進行が抑制され、ひいては、耐火性能を長期間にわたって維持することができる。
According to the present invention, the first refractory material is constituted by an accordion-like block body formed by alternately bending sheet-like inorganic fibers. Thus, when the first refractory material is installed between the underground structures, the first refractory material that is a block body is fitted between the underground structures without forming the deformation-permissible bending portion as described above, Since both ends of the first refractory material may be fixed to the respective end faces of the underground structure, the first refractory material can be easily installed between the underground structures.
According to the present invention, since the first refractory material is constituted by the accordion-like block body, the first refractory material can sufficiently secure the thickness in the radial direction of the underground structure, The progress of settling and leaning due to deterioration over time is suppressed, and as a result, fire resistance can be maintained over a long period of time.
以下に本発明の実施の形態を図面に基づいて説明する。
図１は本発明の一実施形態における可撓継手の概略構成を示す図である。図２は図１のＡ−Ａ断面図である。ここでＡ−Ａ断面はトンネル周方向に沿う断面である。また、以下の説明ではトンネル径方向内側を単に「内側」と称する。同様に、トンネル径方向外側を単に「外側」と称する。
尚、本実施形態では、可撓継手が接続される地下構造物として、シールドトンネルの覆工体を例に挙げて説明するが、可撓継手が接続される地下構造物はこれに限らない。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a schematic configuration of a flexible joint in an embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. Here, the AA cross section is a cross section along the tunnel circumferential direction. In the following description, the inner side in the tunnel radial direction is simply referred to as “inner side”. Similarly, the outer side in the tunnel radial direction is simply referred to as “outer side”.
In addition, in this embodiment, the underground structure to which the flexible joint is connected will be described as an example of a shield tunnel covering body, but the underground structure to which the flexible joint is connected is not limited thereto.
図示の可撓継手１は、シールド工法によって形成されるシールドトンネル（図示せず）に設置されるものである。
シールド工法では、シールド掘進機（図示せず）の掘進に伴って、円弧状のセグメント２をトンネル周方向及びトンネル軸方向に相互に連結することにより、円筒状の覆工体３、３’を形成する。尚、本実施形態では、セグメント２が、主にコンクリートからなるＲＣセグメントであるが、セグメント２はこれに限らず、例えば、主に鋼材からなる鋼製セグメントや、主にコンクリートと鋼材とからなる合成セグメントであってもよい。
The illustrated flexible joint 1 is installed in a shield tunnel (not shown) formed by a shield method.
In the shield method, as the shield machine (not shown) digs, the arcuate segments 2 are connected to each other in the tunnel circumferential direction and the tunnel axial direction, thereby forming the cylindrical covering bodies 3 and 3 ′. Form. In the present embodiment, the segment 2 is an RC segment mainly made of concrete. However, the segment 2 is not limited to this, for example, a steel segment mainly made of steel, or mainly made of concrete and steel. It may be a synthetic segment.
本実施形態では、シールドトンネルの切羽側を構成する覆工体３と、坑口側を構成する覆工体３’との間に、可撓継手１が設置されている。
可撓継手１は、一対の継手枠体４ａ、４ｂと、可撓性の止水部材５とを含んで構成される。継手枠体４ａ、４ｂは金属製である。止水部材５は、ゴムや合成樹脂などの弾性材によって形成される。
In the present embodiment, the flexible joint 1 is installed between the covering body 3 that forms the face side of the shield tunnel and the covering body 3 ′ that forms the wellhead side.
The flexible joint 1 includes a pair of joint frames 4a and 4b and a flexible water stop member 5. The joint frames 4a and 4b are made of metal. The water stop member 5 is formed of an elastic material such as rubber or synthetic resin.
切羽側の継手枠体４ａは、覆工体３の坑口側の端面３ａに面接触して固定される円環板状の基部６ａと、基部６ａの外縁部より坑口側に張り出した円筒状のカバー部７ａとからなる。継手枠体４ａの基部６ａ及びカバー部７ａは双方共にトンネル周方向に連続している。基部６ａの外周面は、覆工体３の外周面と面一になっている。基部６ａの外周面と内周面との間の距離は、覆工体３の外周面と内周面との間の距離のほぼ半分である。尚、基部６ａは、例えば、図示しないコンクリートアンカー及びナットによって、覆工体３の端面３ａに固定される。 The face side joint frame 4a includes a ring-shaped base portion 6a fixed in surface contact with the end surface 3a on the wellhead side of the lining body 3, and a cylindrical shape protruding from the outer edge of the base portion 6a to the wellhead side. It consists of a cover part 7a. Both the base portion 6a and the cover portion 7a of the joint frame 4a are continuous in the tunnel circumferential direction. The outer peripheral surface of the base portion 6 a is flush with the outer peripheral surface of the covering body 3. The distance between the outer peripheral surface and the inner peripheral surface of the base portion 6a is approximately half of the distance between the outer peripheral surface and the inner peripheral surface of the covering 3. The base 6a is fixed to the end surface 3a of the covering body 3 by, for example, a concrete anchor and a nut (not shown).
坑口側の継手枠体４ｂは、覆工体３’の切羽側の端面３ｂに面接触して固定される円環板状の基部６ｂと、基部６ｂの外縁部より切羽側に張り出した円筒状のカバー部７ｂとからなる。継手枠体４ｂの基部６ｂ及びカバー部７ｂは双方共にトンネル周方向に連続している。基部６ｂの外周面は、覆工体３’の外周面と面一になっている。基部６ｂの外周面と内周面との間の距離は、覆工体３’の外周面と内周面との間の距離のほぼ半分である。尚、基部６ｂは、例えば、図示しないコンクリートアンカー及びナットによって、覆工体３’の端面３ｂに固定される。 The joint frame 4b on the wellhead side has an annular plate-like base portion 6b fixed in surface contact with the end face 3b on the face side of the lining body 3 ′, and a cylindrical shape protruding from the outer edge of the base portion 6b to the face side. Cover portion 7b. Both the base portion 6b and the cover portion 7b of the joint frame 4b are continuous in the tunnel circumferential direction. The outer peripheral surface of the base 6b is flush with the outer peripheral surface of the covering body 3 '. The distance between the outer peripheral surface and the inner peripheral surface of the base 6b is approximately half of the distance between the outer peripheral surface and the inner peripheral surface of the covering body 3 '. The base portion 6b is fixed to the end surface 3b of the covering body 3 'by, for example, a concrete anchor and a nut (not shown).
従って、一対の継手枠体４ａ、４ｂは、接続される覆工体３、３’同士の対向する端面３ａ、３ｂにそれぞれ設けられてトンネル周方向に連続している。 Therefore, the pair of joint frames 4a and 4b are respectively provided on the end faces 3a and 3b facing each other of the covering bodies 3 and 3 'to be connected, and are continuous in the tunnel circumferential direction.
継手枠体４ａのカバー部７ａの坑口側端部は、空隙８を隔てて、継手枠体４ｂのカバー部７ｂの切羽側端部に対向している。 The well end side end portion of the cover portion 7a of the joint frame body 4a faces the face side end portion of the cover portion 7b of the joint frame body 4b with the gap 8 therebetween.
止水部材５は、カバー部７ａ、７ｂ間を跨ぐようにカバー部７ａ、７ｂに設けられており、トンネル周方向に連続している。
止水部材５は、内側に向けて膨出したＵ字状の断面を有している。
止水部材５の切羽側のフランジ部５ａの外面はカバー部７ａの内面に接触している。また、止水部材５の坑口側のフランジ部５ｂの外面はカバー部７ｂの内面に接触している。
The water stop member 5 is provided in the cover portions 7a and 7b so as to straddle between the cover portions 7a and 7b, and is continuous in the circumferential direction of the tunnel.
The water stop member 5 has a U-shaped cross section that bulges inward.
The outer surface of the flange portion 5a on the face side of the water stop member 5 is in contact with the inner surface of the cover portion 7a. Further, the outer surface of the flange portion 5b on the wellhead side of the water blocking member 5 is in contact with the inner surface of the cover portion 7b.
止水部材５は、そのフランジ部５ａ、５ｂにて、カバー部７ａ、７ｂに水密的に固定されている。止水部材５は、例えば、図示しない取付ボルトによって、カバー部７ａ、７ｂに水密的に締着される。これにより、止水部材５は、内外の水密性を保ちつつ、継手枠体４ａ、４ｂ同士を連結する。 The water stop member 5 is fixed to the cover portions 7a and 7b in a watertight manner by the flange portions 5a and 5b. The water-stop member 5 is fastened to the cover portions 7a and 7b in a watertight manner by, for example, a mounting bolt (not shown). Thereby, the water stop member 5 connects joint frame body 4a, 4b, maintaining the watertightness inside and outside.
止水部材５より内側における覆工体３の端面３ａと覆工体３’の端面３ｂとの間には、可撓継手１の耐火構造１０が設けられている。
この耐火構造１０は、複数の第１耐火材１１、複数の第２耐火材１２、金属製の網状部材１３、１４、複数の押さえ板１５ａ、１５ｂ、１６ａ、１６ｂ、及び、複数の押さえ金具１７、１８を含んで構成される。
Between the end surface 3a of the covering body 3 and the end surface 3b of the covering body 3 ′ inside the water blocking member 5, a fireproof structure 10 of the flexible joint 1 is provided.
The fireproof structure 10 includes a plurality of first refractory materials 11, a plurality of second refractory materials 12, metal mesh members 13 and 14, a plurality of pressing plates 15 a, 15 b, 16 a and 16 b, and a plurality of pressing brackets 17. , 18.
第１耐火材１１は、止水部材５より内側における覆工体３の端面３ａと覆工体３’の端面３ｂとの間に介装されている。
第１耐火材１１は、シート状の無機繊維を所定の長さで交互に折り曲げて形成したアコーディオン状のブロック体により構成されている。この第１耐火材１１では、シート状の無機繊維がトンネル軸方向にアコーディオン状に積層されている。
The first refractory material 11 is interposed between the end surface 3 a of the covering body 3 and the end surface 3 b of the covering body 3 ′ inside the water blocking member 5.
The first refractory material 11 is constituted by an accordion-like block body formed by alternately bending sheet-like inorganic fibers with a predetermined length. In the first refractory material 11, sheet-like inorganic fibers are laminated in an accordion shape in the tunnel axis direction.
ここで、本実施形態では、第１耐火材１１を構成するシート状の無機繊維として、新日本サーマルセラミックス株式会社製のスーパーウール（Superwool（登録商標））ブランケット（幅：約３００ｍｍ×長さ：約４２００ｍｍ×厚さ：約５０ｍｍ）を用いている。
このシート状の無機繊維について、一端から約３００ｍｍの長さの箇所で最初の折り曲げを行い、この後、所定の長さである２００ｍｍごとに交互に計１８回折り曲げて直方体状のブロック体を形成し、このブロック体を本実施形態では第１耐火材１１としている。
Here, in this embodiment, as a sheet-like inorganic fiber constituting the first refractory material 11, a superwool (registered trademark) blanket (width: about 300 mm × length: manufactured by Nippon Thermal Ceramics Co., Ltd.). About 4200 mm × thickness: about 50 mm).
This sheet-like inorganic fiber is first bent at a position of about 300 mm from one end, and then bent 18 times in total every predetermined length of 200 mm to form a rectangular block. And this block body is made into the 1st refractory material 11 in this embodiment.
第１耐火材１１の寸法の一例は以下のとおりであるが、寸法はこれに限らない。
トンネル周方向の長さＷ：約３００ｍｍ
トンネル径方向の長さＨ１：約３００ｍｍ
トンネル径方向の長さＨ２：約２００ｍｍ
トンネル軸方向の長さＬ：約４００ｍｍ
ここにおいて、トンネル径方向の長さＨ１とは、第１耐火材１１の切羽側の端部１１ａ及び坑口側の端部１１ｂでのトンネル径方向の長さを意味する。また、トンネル径方向の長さＨ２とは、第１耐火材１１のうち切羽側の端部１１ａと坑口側の端部１１ｂとの間の部分（すなわち中間部分）でのトンネル径方向の長さを意味する。第１耐火材１１の端部１１ａ、１１ｂのうち、第１耐火材１１の中間部分より内側に張り出している部分（張り出し部１１ａｔ，１１ｂｔ）は、それぞれ、覆工体３、３’への取り付けのための取付部として機能する。
An example of the dimensions of the first refractory material 11 is as follows, but the dimensions are not limited thereto.
Tunnel circumferential length W: about 300mm
Tunnel radial length H1: about 300mm
Tunnel radial length H2: Approximately 200mm
Length L in tunnel axis direction: about 400mm
Here, the length H1 in the tunnel radial direction means the length in the tunnel radial direction at the end portion 11a on the face side and the end portion 11b on the wellhead side of the first refractory material 11. Further, the length H2 in the tunnel radial direction is the length in the tunnel radial direction at the portion (that is, the middle portion) between the end portion 11a on the face side and the end portion 11b on the wellhead side of the first refractory material 11. Means. Of the end portions 11a and 11b of the first refractory material 11, the portions projecting inward from the intermediate portion of the first refractory material 11 (projected portions 11at and 11bt) are respectively attached to the covering bodies 3 and 3 ′. It functions as a mounting part for.
第１耐火材１１については、シート状の無機繊維を交互に折り曲げて圧縮成形することで、直方体状のブロック体が形成される。それゆえ、第１耐火材１１は、ブロック体形成前のシート状の無機繊維に比べて高密度である。これにより、第１耐火材１１の劣化により無機繊維が疎になってボロボロと落下することを抑制することができる。尚、本実施形態において、シート状の無機繊維の厚さについては、ブロック体形成の前後で約５０ｍｍから約２０ｍｍに減少している。 About the 1st refractory material 11, a rectangular parallelepiped block body is formed by alternately bending and compressing sheet-like inorganic fibers. Therefore, the 1st refractory material 11 is high density compared with the sheet-like inorganic fiber before block body formation. Thereby, it can suppress that an inorganic fiber becomes sparse by the deterioration of the 1st refractory material 11, and falls tumble. In the present embodiment, the thickness of the sheet-like inorganic fiber is reduced from about 50 mm to about 20 mm before and after the block body is formed.
複数の第１耐火材１１は、各々が覆工体３、３’の端面３ａ、３ｂ間の空隙を塞ぐように、トンネル周方向に１列に並んで配置される。ここで、トンネル周方向で隣接する第１耐火材１１同士は互いに密着していることが好ましい。 The plurality of first refractory materials 11 are arranged in a line in the circumferential direction of the tunnel so as to block the gaps between the end faces 3a and 3b of the covering bodies 3 and 3 '. Here, the first refractory materials 11 adjacent in the tunnel circumferential direction are preferably in close contact with each other.
第１耐火材１１の切羽側の端部１１ａの張り出し部１１ａｔの坑口側表面には押さえ板１５ａの切羽側表面が接触している。
複数の押さえ板１５ａは、各々がトンネル周方向に延在しており、トンネル周方向に１列に並んで配置される。本実施形態では、押さえ板１５ａは、そのトンネル周方向の長さが、第１耐火材１１のトンネル周方向の長さｗの２倍である。それゆえ、本実施形態では、トンネル軸方向で隣接する２つの第１耐火材１１に対して、１枚の押さえ板１５ａが面接触している。尚、押さえ板１５ａのトンネル周方向の長さはこれに限らない。
The face side surface of the pressing plate 15a is in contact with the surface of the overhanging part 11at of the end part 11a on the face side of the first refractory material 11.
Each of the plurality of pressing plates 15a extends in the tunnel circumferential direction, and is arranged in a line in the tunnel circumferential direction. In the present embodiment, the holding plate 15a has a length in the tunnel circumferential direction that is twice the length w of the first refractory material 11 in the tunnel circumferential direction. Therefore, in this embodiment, the one pressing plate 15a is in surface contact with the two first refractory materials 11 adjacent in the tunnel axis direction. The length of the presser plate 15a in the tunnel circumferential direction is not limited to this.
押さえ板１５ａの坑口側表面には、押さえ金具１７の基部２１ａの切羽側表面が接触している。
押さえ金具１７は、矩形の金属板をＬ字状に折り曲げて形成されたものであり、トンネル径方向に延在する基部２１ａと、基部２１ａの外縁部より坑口側に張り出した支持部２２ａとからなる。支持部２２ａの外面は第１耐火材１１の内面に対向している。
The face side surface of the base portion 21a of the presser fitting 17 is in contact with the surface on the wellhead side of the presser plate 15a.
The presser fitting 17 is formed by bending a rectangular metal plate into an L shape, and includes a base portion 21a extending in the tunnel radial direction and a support portion 22a projecting from the outer edge portion of the base portion 21a to the wellhead side. Become. The outer surface of the support portion 22 a faces the inner surface of the first refractory material 11.
第１耐火材１１の切羽側の端部１１ａの張り出し部１１ａｔ、押さえ板１５ａ、及び、押さえ金具１７の基部２１ａには、それぞれ、図示しない貫通孔が予め形成されており、これら貫通孔に挿入されたコンクリートアンカー２４ａ及びナット２５ａによって、第１耐火材１１、押さえ板１５ａ、及び押さえ金具１７が、覆工体３に固定される。このときに、第１耐火材１１の切羽側の端部１１ａは、覆工体３の端面３ａに面接触する。 A through hole (not shown) is formed in advance in each of the overhanging portion 11at of the end portion 11a on the face side of the first refractory material 11, the pressing plate 15a, and the base portion 21a of the pressing metal member 17, and is inserted into these through holes. The first refractory material 11, the presser plate 15 a, and the presser fitting 17 are fixed to the covering body 3 by the concrete anchor 24 a and the nut 25 a. At this time, the end portion 11 a on the face side of the first refractory material 11 is in surface contact with the end surface 3 a of the covering body 3.
第１耐火材１１の坑口側の端部１１ｂの張り出し部１１ｂｔの切羽側表面には押さえ板１５ｂの坑口側表面が接触している。
複数の押さえ板１５ｂは、各々がトンネル周方向に延在しており、トンネル周方向に１列に並んで配置される。本実施形態では、押さえ板１５ｂは、そのトンネル周方向の長さが、第１耐火材１１のトンネル周方向の長さｗの２倍である。それゆえ、本実施形態では、トンネル軸方向で隣接する２つの第１耐火材１１に対して、１枚の押さえ板１５ｂが面接触している。尚、押さえ板１５ｂのトンネル周方向の長さはこれに限らない。
The well-side surface of the pressing plate 15b is in contact with the face side surface of the overhanging portion 11bt of the end portion 11b of the first refractory material 11 on the well-portion side.
Each of the plurality of pressing plates 15b extends in the tunnel circumferential direction, and is arranged in a line in the tunnel circumferential direction. In the present embodiment, the presser plate 15 b has a length in the tunnel circumferential direction that is twice the length w of the first refractory material 11 in the tunnel circumferential direction. Therefore, in this embodiment, the one pressing plate 15b is in surface contact with the two first refractory materials 11 adjacent in the tunnel axis direction. Note that the length of the pressing plate 15b in the tunnel circumferential direction is not limited to this.
押さえ板１５ｂの切羽側表面には、押さえ金具１８の基部２１ｂの切羽側表面が接触している。
押さえ金具１８は、矩形の金属板をＬ字状に折り曲げて形成されたものであり、トンネル径方向に延在する基部２１ｂと、基部２１ｂの外縁部より切羽側に張り出した支持部２２ｂとからなる。支持部２２ｂの外面は第１耐火材１１の内面に対向している。
The face side surface of the base 21b of the presser fitting 18 is in contact with the face side surface of the pressing plate 15b.
The presser fitting 18 is formed by bending a rectangular metal plate into an L shape, and includes a base portion 21b extending in the tunnel radial direction and a support portion 22b projecting from the outer edge portion of the base portion 21b to the face side. Become. The outer surface of the support portion 22 b faces the inner surface of the first refractory material 11.
第１耐火材１１の坑口側の端部１１ｂの張り出し部１１ｂｔ、押さえ板１５ｂ、及び、押さえ金具１８の基部２１ｂには、それぞれ、図示しない貫通孔が予め形成されており、これら貫通孔に挿入されたコンクリートアンカー２４ｂ及びナット２５ｂによって、第１耐火材１１、押さえ板１５ｂ、及び押さえ金具１８が、覆工体３’に固定される。このときに、第１耐火材１１の坑口側の端部１１ｂは、覆工体３’の端面３ｂに面接触する。 A through hole (not shown) is formed in advance in each of the overhanging portion 11bt of the end portion 11b on the wellhead side of the first refractory material 11, the presser plate 15b, and the base portion 21b of the presser fitting 18, and is inserted into these through holes. The first refractory material 11, the pressing plate 15b, and the pressing metal fitting 18 are fixed to the covering body 3 ′ by the concrete anchor 24b and the nut 25b. At this time, the end portion 11b on the wellhead side of the first refractory material 11 is in surface contact with the end surface 3b of the covering body 3 '.
ここで、押さえ金具１７、１８のトンネル周方向の長さは、第１耐火材１１のトンネル周方向の長さＷよりも短い。また、本実施形態では、１つの第１耐火材１１に対して、１組の押さえ金具１７、１８を用いているが、この他、２組以上の押さえ金具１７、１８を用いてもよい。 Here, the length of the presser fittings 17 and 18 in the tunnel circumferential direction is shorter than the length W of the first refractory material 11 in the tunnel circumferential direction. Moreover, in this embodiment, although one set of pressing metal fittings 17 and 18 is used with respect to one 1st refractory material 11, you may use two or more sets of pressing metal fittings 17 and 18.
第１耐火材１１の内面と、押さえ金具１７、１８の支持部２２ａ、２２ｂの各外面との間には網状部材１３が介装されている。
複数の第１耐火材１１からなるリングについては、その少なくとも上部が、網状部材１３と押さえ金具１７、１８とによって支持される。従って、網状部材１３と押さえ金具１７、１８は、本発明の「第１耐火材の内面に接触して第１耐火材を支持する支持部材」として機能し得る。
A mesh member 13 is interposed between the inner surface of the first refractory material 11 and the outer surfaces of the support portions 22a and 22b of the presser fittings 17 and 18.
At least the upper part of the ring made of the plurality of first refractory materials 11 is supported by the mesh member 13 and the presser fittings 17 and 18. Therefore, the mesh member 13 and the holding metal members 17 and 18 can function as a “supporting member that contacts the inner surface of the first refractory material and supports the first refractory material” of the present invention.
継手枠体４ａ、４ｂの基部６ａ、６ｂの各内周面と、第１耐火材１１の外面との間には網状部材１４が介装されている。
複数の第１耐火材１１からなるリングについては、その少なくとも下部が、網状部材１４と、継手枠体４ａ、４ｂの基部６ａ、６ｂとによって支持される。従って、網状部材１４と継手枠体４ａ、４ｂとは、本発明の「第１耐火材の外面に接触して第１耐火材を支持する支持部材」として機能し得る。
A mesh member 14 is interposed between the inner peripheral surfaces of the base portions 6 a and 6 b of the joint frames 4 a and 4 b and the outer surface of the first refractory material 11.
About the ring which consists of several 1st refractory materials 11, the lower part is supported by the net-like member 14 and the base parts 6a and 6b of the joint frame bodies 4a and 4b. Therefore, the mesh member 14 and the joint frames 4a and 4b can function as “a support member that supports the first refractory material by contacting the outer surface of the first refractory material” of the present invention.
第２耐火材１２は、第１耐火材１１より内側における覆工体３の端面３ａと覆工体３’の端面３ｂとの間に配置されている。
第２耐火材１２は、シート状の無機繊維により構成されている。尚、本実施形態では、第２耐火材１２を構成するシート状の無機繊維として、新日本サーマルセラミックス株式会社製のスーパーウール（Superwool（登録商標））ブランケット（幅：約３００ｍｍ×長さ：約１０００ｍｍ×厚さ：約５０ｍｍ）を用いている。
The second refractory material 12 is disposed between the end surface 3a of the covering body 3 and the end surface 3b of the covering body 3 ′ inside the first refractory material 11.
The 2nd refractory material 12 is comprised by the sheet-like inorganic fiber. In the present embodiment, as a sheet-like inorganic fiber constituting the second refractory material 12, a superwool (registered trademark) blanket (width: approximately 300 mm × length: approximately) manufactured by Nippon Thermal Ceramics Co., Ltd. 1000 mm × thickness: about 50 mm).
複数の第２耐火材１２は、各々が覆工体の端面３ａ、３ｂとの間の空隙を塞ぐように、トンネル周方向に１列に並んで配置される。ここで、トンネル周方向で隣接する第２耐火材１２同士は互いに密着していることが好ましい。
第２耐火材１２は、その中央部が内側に向けて弛んだＭ字状をなしている。
The plurality of second refractory materials 12 are arranged in a line in the circumferential direction of the tunnel so that each of the second refractory materials 12 closes the gap between the end faces 3a and 3b of the covering body. Here, the second refractory materials 12 adjacent in the tunnel circumferential direction are preferably in close contact with each other.
The 2nd refractory material 12 has comprised the M shape which the center part loosened toward the inner side.
第２耐火材１２の切羽側の端部１２ａの坑口側表面には押さえ板１６ａの切羽側表面が接触している。
複数の押さえ板１６ａは、各々がトンネル周方向に延在しており、トンネル周方向に１列に並んで配置される。本実施形態では、押さえ板１６ａは、そのトンネル周方向の長さが、第２耐火材１２のトンネル周方向の長さｗの２倍である。それゆえ、本実施形態では、トンネル軸方向で隣接する２つの第２耐火材１２に対して、１枚の押さえ板１６ａが面接触している。尚、押さえ板１６ａのトンネル周方向の長さはこれに限らない。
The face side surface of the pressing plate 16a is in contact with the surface on the wellhead side of the end part 12a on the face side of the second refractory material 12.
Each of the plurality of pressing plates 16a extends in the tunnel circumferential direction, and is arranged in a line in the tunnel circumferential direction. In the present embodiment, the length of the presser plate 16a in the tunnel circumferential direction is twice the length w of the second refractory material 12 in the tunnel circumferential direction. Therefore, in this embodiment, the one pressing plate 16a is in surface contact with the two second refractory materials 12 adjacent in the tunnel axis direction. The length of the presser plate 16a in the tunnel circumferential direction is not limited to this.
第２耐火材１２の切羽側の端部１２ａ及び押さえ板１６ａには、それぞれ、図示しない貫通孔が予め形成されており、これら貫通孔に挿入されたコンクリートアンカー２６ａ及びナット２７ａによって、第２耐火材１２及び押さえ板１６ａが、覆工体３に固定される。このときに、第２耐火材１２の切羽側の端部１２ａは、覆工体３の端面３ａに面接触する。 The end portion 12a on the face side of the second refractory material 12 and the holding plate 16a are respectively formed with through holes (not shown), and the second refractory material is provided by concrete anchors 26a and nuts 27a inserted into the through holes. The material 12 and the pressing plate 16 a are fixed to the covering body 3. At this time, the end portion 12 a on the face side of the second refractory material 12 is in surface contact with the end surface 3 a of the covering body 3.
第２耐火材１２の坑口側の端部１２ｂの切羽側表面には押さえ板１６ｂの坑口側表面が接触している。
複数の押さえ板１６ｂは、各々がトンネル周方向に延在しており、トンネル周方向に１列に並んで配置される。本実施形態では、押さえ板１６ｂは、そのトンネル周方向の長さが、第２耐火材１２のトンネル周方向の長さｗの２倍である。それゆえ、本実施形態では、トンネル軸方向で隣接する２つの第２耐火材１２に対して、１枚の押さえ板１６ｂが面接触している。尚、押さえ板１６ｂのトンネル周方向の長さはこれに限らない。
The face side surface of the pressing plate 16b is in contact with the face side surface of the end part 12b on the well side of the second refractory material 12.
Each of the plurality of holding plates 16b extends in the tunnel circumferential direction, and is arranged in a line in the tunnel circumferential direction. In the present embodiment, the length of the presser plate 16b in the tunnel circumferential direction is twice the length w of the second refractory material 12 in the tunnel circumferential direction. Therefore, in this embodiment, the one pressing plate 16b is in surface contact with the two second refractory materials 12 adjacent in the tunnel axis direction. The length of the presser plate 16b in the tunnel circumferential direction is not limited to this.
第２耐火材１２の坑口側の端部１２ｂ及び押さえ板１６ｂには、それぞれ、図示しない貫通孔が予め形成されており、これら貫通孔に挿入されたコンクリートアンカー２６ｂ及びナット２７ｂによって、第２耐火材１２及び押さえ板１６ｂが、覆工体３’に固定される。このときに、第２耐火材１２の坑口側の端部１２ｂは、覆工体３’の端面３ｂに面接触する。 The end portion 12b on the wellhead side of the second refractory material 12 and the holding plate 16b are respectively formed with through holes (not shown), and the second fire refractory material is provided by concrete anchors 26b and nuts 27b inserted into the through holes. The material 12 and the pressing plate 16b are fixed to the covering body 3 ′. At this time, the end portion 12b on the wellhead side of the second refractory material 12 is in surface contact with the end surface 3b of the covering body 3 '.
尚、本実施形態では、第１耐火材１１と第２耐火材１２とが同程度の厚さを有するスーパーウール（Superwool（登録商標））ブランケットから形成されている。しかしながら、第１耐火材１１については、ブロック体形成時に圧縮成形されることにより高密度化される。それゆえ、本実施形態では、第１耐火材１１の密度（単位体積あたりの質量）が第２耐火材１２の密度（単位体積あたりの質量）よりも高い。 In the present embodiment, the first refractory material 11 and the second refractory material 12 are formed from a superwool (registered trademark) blanket having the same thickness. However, the first refractory material 11 is densified by being compression-molded when the block body is formed. Therefore, in this embodiment, the density (mass per unit volume) of the first refractory material 11 is higher than the density (mass per unit volume) of the second refractory material 12 .
耐火構造１０は、覆工体の端面３ａ、３ｂ間の開口部３０を内側から塞ぐように設けられる金属製の板状部材３１を更に含んで構成される。
板状部材３１には図示しない複数の貫通孔が予め形成されており、これら貫通孔に挿入されたコンクリートアンカー３３及びナット３４によって、板状部材３１が覆工体３、３’に固定される。
尚、板状部材３１の外面には第２耐火材１２が面接触している。
The fireproof structure 10 further includes a metal plate-like member 31 provided so as to close the opening 30 between the end faces 3a and 3b of the covering body from the inside.
A plurality of through holes (not shown) are formed in the plate-like member 31 in advance, and the plate-like member 31 is fixed to the covering body 3, 3 ′ by a concrete anchor 33 and a nut 34 inserted into these through-holes. .
The second refractory material 12 is in surface contact with the outer surface of the plate member 31.
本実施形態によれば、可撓継手１は、接続される覆工体３、３’（地下構造物）同士の対向する端面３ａ、３ｂにそれぞれ設けられてトンネル周方向に連続する一対の継手枠体４ａ、４ｂと、継手枠体４ａ、４ｂ間を跨ぐように継手枠体４ａ、４ｂに設けられてトンネル周方向に連続する可撓性の止水部材５と、を含んで構成される。可撓継手１の耐火構造１０は、止水部材５より内側における覆工体３、３’の端面３ａ、３ｂ間に介装される第１耐火材１１を備える。第１耐火材１１は、シート状の無機繊維を交互に折り曲げて形成したアコーディオン状のブロック体により構成され、その両端部１１ａ、１１ｂが、覆工体３、３’の各端面３ａ、３ｂにそれぞれ固定される。これにより、第１耐火材１１を覆工体３、３’間に設置するときに、ブロック体である第１耐火材１１を覆工体３、３’間に嵌め込んで、第１耐火材１１の両端部１１ａ、１１ｂを、覆工体３、３’の各端面３ａ、３ｂにそれぞれ固定すればよいので、第１耐火材１１を覆工体３、３’間に簡単に設置することができる。 According to this embodiment, the flexible joint 1 is a pair of joints that are respectively provided on the opposing end surfaces 3a and 3b of the lining bodies 3 and 3 ′ (underground structures) to be connected and are continuous in the circumferential direction of the tunnel. The frame body 4a, 4b, and the flexible water stop member 5 provided in the joint frame body 4a, 4b so as to straddle between the joint frame body 4a, 4b and continuing in the circumferential direction of the tunnel. . The fireproof structure 10 of the flexible joint 1 includes a first fireproof material 11 interposed between the end faces 3 a and 3 b of the covering bodies 3 and 3 ′ inside the water blocking member 5. The first refractory material 11 is composed of an accordion-like block body formed by alternately bending sheet-like inorganic fibers, and both end portions 11a and 11b are formed on the end surfaces 3a and 3b of the covering bodies 3 and 3 ′. Each is fixed. Thereby, when installing the 1st refractory material 11 between the covering bodies 3 and 3 ', the 1st refractory material 11 which is a block body is inserted between the covering bodies 3 and 3', Since both end parts 11a and 11b of 11 should just be fixed to each end surface 3a and 3b of covering body 3, 3 ', respectively, installing the 1st refractory material 11 between covering bodies 3 and 3' simply. Can do.
また本実施形態によれば、第１耐火材１１がアコーディオン状のブロック体により構成されることにより、第１耐火材１１は、トンネル径方向での厚さを十分に確保することができるので、経時劣化によるヘタリや肉痩せの進行が抑制され、ひいては、耐火性能を長期間にわたって維持することができる。 Moreover, according to this embodiment, since the 1st refractory material 11 is comprised with an accordion-like block body, since the 1st refractory material 11 can fully ensure the thickness in a tunnel radial direction, The progress of settling and leaning due to deterioration over time is suppressed, and as a result, fire resistance can be maintained over a long period of time.
また本実施形態によれば、第１耐火材１１は、シート状の無機繊維がトンネル軸方向にアコーディオン状に積層されてなる。これにより、第１耐火材１１はトンネル軸方向において大きな伸び代を有することになるので、シールドトンネルの大きな変形などにも追従することができる。 According to the present embodiment, the first refractory material 11 is formed by laminating sheet-like inorganic fibers in an accordion shape in the tunnel axis direction. Thereby, since the 1st refractory material 11 has a big expansion allowance in a tunnel axial direction, it can also follow the big deformation | transformation etc. of a shield tunnel.
また本実施形態によれば、耐火構造１０は、第１耐火材１１の内面に接触して第１耐火材１１を支持する支持部材（網状部材１３及び押さえ金具１７、１８）を備える。これにより、複数の第１耐火材１１からなるリングについては、その少なくとも上部が、網状部材１３と押さえ金具１７、１８とによって支持されるので、当該リング上部での第１耐火材１１の自重による変形を抑制することができる。 Moreover, according to this embodiment, the fireproof structure 10 is provided with the supporting member (the net-like member 13 and the holding metal fittings 17 and 18) which contacts the inner surface of the 1st fireproof material 11, and supports the 1st fireproof material 11. Thereby, about the ring which consists of a some 1st refractory material 11, since the at least upper part is supported by the net-like member 13 and the holding | suppressing metal fittings 17 and 18, by the dead weight of the 1st refractory material 11 in the said ring upper part Deformation can be suppressed.
また本実施形態によれば、耐火構造１０は、第１耐火材１１の外面に接触して第１耐火材１１を支持する支持部材（網状部材１４及び継手枠体４ａ、４ｂ）を備える。これにより、複数の第１耐火材１１からなるリングについては、その少なくとも下部が、網状部材１４と継手枠体４ａ、４ｂとによって支持されるので、当該リング下部での第１耐火材１１の自重による変形を抑制することができる。 Moreover, according to this embodiment, the fireproof structure 10 is provided with the supporting member (the net-like member 14 and joint frame 4a, 4b) which contacts the outer surface of the 1st fireproof material 11, and supports the 1st fireproof material 11. Thereby, about the ring which consists of a plurality of 1st refractory materials 11, since the at least lower part is supported by net-like member 14 and joint frame bodies 4a and 4b, the dead weight of the 1st refractory material 11 in the lower part of the ring concerned The deformation | transformation by can be suppressed.
また本実施形態によれば、耐火構造１０は、第１耐火材１１より内側における覆工体３、３’の端面３ａ、３ｂ間に配置される第２耐火材１２を備える。第２耐火材１２はシート状の無機繊維により構成される。第２耐火材１２は、内側に向けて弛んだ状態で、両端部１２ａ、１２ｂが覆工体３、３’の各端面３ａ、３ｂにそれぞれ固定される。これにより、トンネル内での火災発生時に第１耐火材１１が火炎などに曝されるリスクを軽減することができる。 Moreover, according to this embodiment, the fireproof structure 10 is provided with the 2nd fireproof material 12 arrange | positioned between the end surfaces 3a and 3b of the covering bodies 3 and 3 'inside the 1st fireproof material 11. FIG. The second refractory material 12 is composed of sheet-like inorganic fibers. In the state where the second refractory material 12 is slacked inward, both end portions 12a and 12b are respectively fixed to the end surfaces 3a and 3b of the covering bodies 3 and 3 '. Thereby, the risk that the 1st refractory material 11 is exposed to a flame etc. at the time of the fire outbreak in a tunnel can be reduced.
また本実施形態によれば、第１耐火材１１の密度は、第２耐火材１２の密度よりも高い。これにより、第１耐火材１１の劣化によって無機繊維が疎になってボロボロと落下することを抑制することができる。 Further, according to the present embodiment, the density of the first refractory material 11 is higher than the density of the second refractory material 12. Thereby, it can suppress that an inorganic fiber becomes sparse by deterioration of the 1st refractory material 11, and falls tumble.
また本実施形態によれば、耐火構造１０は、覆工体３、３’の端面３ａ、３ｂ間の開口部３０を内側から塞ぐように設けられる金属製の板状部材３１を更に備える。これにより、トンネル内での火災発生時に第１耐火材１１及び第２耐火材１２が火炎などに曝されるリスクを軽減することができる。 Moreover, according to this embodiment, the fireproof structure 10 is further provided with the metal plate-shaped member 31 provided so that the opening part 30 between the end surfaces 3a and 3b of the covering bodies 3 and 3 'may be plugged from the inside. Thereby, the risk that the 1st refractory material 11 and the 2nd refractory material 12 are exposed to a flame etc. at the time of the fire outbreak in a tunnel can be reduced.
尚、本実施形態では、第１耐火材１１及び第２耐火材１２が、それぞれ、覆工体３、３’の端面３ａ、３ｂに面接触した状態で直接的に固定されているが、覆工体３、３’の端面３ａ、３ｂへの第１耐火材１１及び第２耐火材１２の固定方法はこれに限らない。例えば、継手枠体４ａ、４ｂの基部６ａ、６ｂをトンネル径方向内側に延長して延長部を形成し、この延長部に第１耐火材１１及び第２耐火材１２が面接触した状態で固定されてもよい。この場合には、第１耐火材１１及び第２耐火材１２が、それぞれ、継手枠体４ａ、４ｂの基部６ａ、６ｂ及びその延長部を介して、覆工体３、３’の端面３ａ、３ｂに間接的に固定され得る。 In the present embodiment, the first refractory material 11 and the second refractory material 12 are directly fixed in a state where they are in surface contact with the end faces 3a and 3b of the covering bodies 3, 3 ′. The method of fixing the first refractory material 11 and the second refractory material 12 to the end faces 3a, 3b of the work bodies 3, 3 ′ is not limited to this. For example, the base portions 6a and 6b of the joint frames 4a and 4b are extended inward in the tunnel radial direction to form an extension portion, and the first refractory material 11 and the second refractory material 12 are fixed to the extension portions in surface contact. May be. In this case, the first refractory material 11 and the second refractory material 12 are respectively connected to the end faces 3a of the covering bodies 3, 3 ′ via the base portions 6a, 6b of the joint frames 4a, 4b and their extensions. It can be indirectly fixed to 3b.
また本実施形態では、第１耐火材１１及び第２耐火材１２を構成するシート状の無機繊維として新日本サーマルセラミックス株式会社製のスーパーウール（Superwool（登録商標））ブランケットを挙げて説明したが、シート状の無機繊維はこれに限らない。例えば、シート状の無機繊維としてグラスウールを含むシートなどを用いてよい。 Further, in the present embodiment, as a sheet-like inorganic fiber constituting the first refractory material 11 and the second refractory material 12, a superwool (registered trademark) blanket manufactured by Shin Nippon Thermal Ceramics Co., Ltd. has been described. The sheet-like inorganic fiber is not limited to this. For example, a sheet containing glass wool as the sheet-like inorganic fiber may be used.
また本実施形態では、覆工体３、３’の断面形状が円形状であるが、覆工体３、３’の断面形状はこれに限らない。例えば、覆工体３、３’の断面形状は楕円形状であってもよい。 In the present embodiment, the cross-sectional shape of the covering bodies 3 and 3 ′ is circular, but the cross-sectional shape of the covering bodies 3 and 3 ′ is not limited to this. For example, the cross-sectional shape of the covering bodies 3 and 3 ′ may be elliptical.
また本実施形態では、可撓継手１が接続される地下構造物として、シールドトンネルの覆工体３、３’を例に挙げて説明したが、可撓継手１が接続される地下構造物はこれに限らない。例えば、可撓継手１が接続される地下構造物は、発進立坑などの立坑であり得る。 Further, in the present embodiment, as the underground structure to which the flexible joint 1 is connected, the shield tunnel covering bodies 3 and 3 ′ are described as examples. However, the underground structure to which the flexible joint 1 is connected is described below. Not limited to this. For example, the underground structure to which the flexible joint 1 is connected may be a shaft such as a start shaft.
１ 可撓継手
２ セグメント
３、３’ 覆工体
３ａ、３ｂ 端面
４ａ、４ｂ 継手枠体
５ 止水部材
５ａ、５ｂ フランジ部
６ａ、６ｂ 基部
７ａ、７ｂ カバー部
８ 空隙
１０ 耐火構造
１１ 第１耐火材
１１ａ、１１ｂ 端部
１１ａｔ，１１ｂｔ 張り出し部
１２ 第２耐火材
１２ａ、１２ｂ 端部
１３、１４ 網状部材
１５ａ、１５ｂ、１６ａ、１６ｂ 押さえ板
１７、１８ 押さえ金具
２１ａ、２１ｂ 基部
２２ａ、２２ｂ 支持部
２４ａ、２４ｂ コンクリートアンカー
２５ａ、２５ｂ ナット
２６ａ、２６ｂ コンクリートアンカー
２７ａ、２７ｂ ナット
３０ 開口部
３１ 板状部材
３３ コンクリートアンカー
３４ ナット
DESCRIPTION OF SYMBOLS 1 Flexible joint 2 Segment 3, 3 'Cover body 3a, 3b End surface 4a, 4b Joint frame 5 Water stop member 5a, 5b Flange part 6a, 6b Base part 7a, 7b Cover part 8 Cavity 10 Fireproof structure 11 1st fireproof structure Materials 11a, 11b End portions 11at, 11bt Overhang portion 12 Second refractory material 12a, 12b End portions 13, 14 Net members 15a, 15b, 16a, 16b Press plates 17, 18 Press brackets 21a, 21b Base portions 22a, 22b Support portions 24a 24b Concrete anchors 25a, 25b Nuts 26a, 26b Concrete anchors 27a, 27b Nuts 30 Openings 31 Plate members 33 Concrete anchors 34 Nuts
Claims (6)
前記止水部材より前記地下構造物の内側における前記地下構造物の端面間に介装される第１耐火材と、
前記第１耐火材より前記地下構造物の内側における前記地下構造物の端面間に配置される第２耐火材と、を備え、
前記第１耐火材は、シート状の無機繊維を交互に折り曲げて形成したアコーディオン状のブロック体により構成され、その両端部が、前記地下構造物の各端面にそれぞれ固定され、
前記第２耐火材はシート状の無機繊維により構成され、その両端部が前記地下構造物の各端面にそれぞれ固定され、
前記第１耐火材の密度は、前記第２耐火材の密度よりも高い、地下構造物用の可撓継手の耐火構造。 A pair of joint frames that are respectively provided on opposite end surfaces of the connected underground structures and that are continuous in the circumferential direction of the underground structure, and are provided on the joint frames so as to straddle between the joint frames. A flexible water-stopping member continuous in the circumferential direction of the underground structure, and a fireproof structure of a flexible joint,
A first refractory material interposed between the end surfaces of the underground structure inside the underground structure from the water stop member ;
A second refractory material disposed between the end surfaces of the underground structure inside the underground structure from the first refractory material ,
The first refractory material is constituted by an accordion-shaped block body formed by alternately bending sheet-like inorganic fibers, and both end portions thereof are fixed to the respective end surfaces of the underground structure ,
The second refractory material is composed of sheet-like inorganic fibers, and both end portions thereof are respectively fixed to the end surfaces of the underground structure,
The density of the said 1st refractory material is a fireproof structure of the flexible joint for underground structures whose density of the said 2nd refractory material is higher .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013232841A JP5559413B1 (en) | 2013-11-11 | 2013-11-11 | Fireproof structure of flexible joints for underground structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013232841A JP5559413B1 (en) | 2013-11-11 | 2013-11-11 | Fireproof structure of flexible joints for underground structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP5559413B1 true JP5559413B1 (en) | 2014-07-23 |
| JP2015094091A JP2015094091A (en) | 2015-05-18 |
Family
ID=51416970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013232841A Active JP5559413B1 (en) | 2013-11-11 | 2013-11-11 | Fireproof structure of flexible joints for underground structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5559413B1 (en) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9359554B2 (en) | 2012-08-17 | 2016-06-07 | Suncoke Technology And Development Llc | Automatic draft control system for coke plants |
| US9243186B2 (en) | 2012-08-17 | 2016-01-26 | Suncoke Technology And Development Llc. | Coke plant including exhaust gas sharing |
| CN104902984B (en) | 2012-12-28 | 2019-05-31 | 太阳焦炭科技和发展有限责任公司 | System and method for removing the mercury in emission |
| WO2014105063A1 (en) | 2012-12-28 | 2014-07-03 | Suncoke Technology And Development Llc. | Systems and methods for maintaining a hot car in a coke plant |
| WO2014105065A1 (en) | 2012-12-28 | 2014-07-03 | Suncoke Technology And Development Llc. | Vent stack lids and associated systems and methods |
| US10047295B2 (en) | 2012-12-28 | 2018-08-14 | Suncoke Technology And Development Llc | Non-perpendicular connections between coke oven uptakes and a hot common tunnel, and associated systems and methods |
| US9273250B2 (en) | 2013-03-15 | 2016-03-01 | Suncoke Technology And Development Llc. | Methods and systems for improved quench tower design |
| EP3090034B1 (en) | 2013-12-31 | 2020-05-06 | Suncoke Technology and Development LLC | Methods for decarbonizing coking ovens, and associated systems and devices |
| UA123493C2 (en) | 2014-08-28 | 2021-04-14 | Санкоук Текнолоджі Енд Дівелепмент Ллк | Method and system for optimizing coke plant operation and output |
| AU2015317909B2 (en) | 2014-09-15 | 2020-11-05 | Suncoke Technology And Development Llc | Coke ovens having monolith component construction |
| US10975310B2 (en) | 2014-12-31 | 2021-04-13 | Suncoke Technology And Development Llc | Multi-modal beds of coking material |
| EP3240862A4 (en) | 2015-01-02 | 2018-06-20 | Suncoke Technology and Development LLC | Integrated coke plant automation and optimization using advanced control and optimization techniques |
| CA3203921A1 (en) | 2015-12-28 | 2017-07-06 | Suncoke Technology And Development Llc | Method and system for dynamically charging a coke oven |
| EP3465369A4 (en) | 2016-06-03 | 2020-01-15 | Suncoke Technology and Development LLC | Methods and systems for automatically generating a remedial action in an industrial facility |
| WO2018217955A1 (en) | 2017-05-23 | 2018-11-29 | Suncoke Technology And Development Llc | System and method for repairing a coke oven |
| WO2020140079A1 (en) | 2018-12-28 | 2020-07-02 | Suncoke Technology And Development Llc | Decarbonizatign of coke ovens, and associated systems and methods |
| US11365355B2 (en) | 2018-12-28 | 2022-06-21 | Suncoke Technology And Development Llc | Systems and methods for treating a surface of a coke plant |
| US11760937B2 (en) | 2018-12-28 | 2023-09-19 | Suncoke Technology And Development Llc | Oven uptakes |
| BR112021012455B1 (en) | 2018-12-28 | 2023-10-24 | Suncoke Technology And Development Llc | COKE OVEN |
| US11098252B2 (en) | 2018-12-28 | 2021-08-24 | Suncoke Technology And Development Llc | Spring-loaded heat recovery oven system and method |
| WO2020140086A1 (en) | 2018-12-28 | 2020-07-02 | Suncoke Technology And Development Llc | Particulate detection for industrial facilities, and associated systems and methods |
| US11395989B2 (en) | 2018-12-31 | 2022-07-26 | Suncoke Technology And Development Llc | Methods and systems for providing corrosion resistant surfaces in contaminant treatment systems |
| CA3125585C (en) | 2018-12-31 | 2023-10-03 | Suncoke Technology And Development Llc | Improved systems and methods for utilizing flue gas |
| CA3177017C (en) | 2020-05-03 | 2024-04-16 | John Francis Quanci | High-quality coke products |
| WO2023081821A1 (en) | 2021-11-04 | 2023-05-11 | Suncoke Technology And Development Llc | Foundry coke products, and associated systems, devices, and methods |
| US11946108B2 (en) | 2021-11-04 | 2024-04-02 | Suncoke Technology And Development Llc | Foundry coke products and associated processing methods via cupolas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3128108B2 (en) * | 1994-11-17 | 2001-01-29 | 新日本製鐵株式会社 | Internal insulation structure of telescopic tube for high temperature |
| JP2005344352A (en) * | 2004-06-02 | 2005-12-15 | Seibu Polymer Corp | Flexible joint with heat insulation structure, for underground constructions |
-
2013
- 2013-11-11 JP JP2013232841A patent/JP5559413B1/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3128108B2 (en) * | 1994-11-17 | 2001-01-29 | 新日本製鐵株式会社 | Internal insulation structure of telescopic tube for high temperature |
| JP2005344352A (en) * | 2004-06-02 | 2005-12-15 | Seibu Polymer Corp | Flexible joint with heat insulation structure, for underground constructions |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015094091A (en) | 2015-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5559413B1 (en) | Fireproof structure of flexible joints for underground structures | |
| JP6475310B2 (en) | Temporary deadline structure | |
| AU2007218923A1 (en) | A rotary kiln | |
| JP2018071144A (en) | Method for constructing underground concrete structure, and underground concrete structure | |
| KR20130097385A (en) | Structure of reinforced columns by multi-layer steel plates | |
| JP6791586B2 (en) | Structure of support work in tunnel and installation method of support work | |
| JP6780470B2 (en) | segment | |
| JP5679834B2 (en) | Fire spread prevention device and its construction method | |
| KR101384738B1 (en) | Waterproofing method for precast tunnel structure | |
| JP2006249721A (en) | Double flexible joint mounting structure | |
| JP5643608B2 (en) | Fixing method and structure for rooftop installation | |
| JP6692175B2 (en) | End structure of preceding element and construction method of underground wall | |
| KR101372410B1 (en) | Slab construction for the block | |
| JP2006002428A (en) | Reinforcing method of existing floor and base isolation method of existing building | |
| KR20120106485A (en) | Stiffener for preventing flange buckling of h shaped steel | |
| JP2009203717A (en) | Concrete structure | |
| KR20130039454A (en) | Angle bracket for fixing exterior of insulation panel and that construction method | |
| JP6818462B2 (en) | Fireproof structure | |
| JP6996688B2 (en) | Fireproof coating structure of seismic isolation device | |
| JP2007277873A (en) | Cotter member | |
| JP6289923B2 (en) | Surface material mounting structure for lightweight embankment method and construction structure for lightweight embankment method | |
| KR101536475B1 (en) | Drywall system using ceramic fiber blanket | |
| JP2016056855A (en) | Piping module and penetration part structure | |
| CN114033417B (en) | Environment-friendly concrete prefabricated wall, construction method thereof and tunnel | |
| JP2000064328A (en) | Continuous underground wall in vibration control underground structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20140428 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20140520 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20140605 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5559413 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |