JP2006283322A - Water cutoff method for extended segment, and composite segment with water cutoff sheet - Google Patents

Water cutoff method for extended segment, and composite segment with water cutoff sheet Download PDF

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JP2006283322A
JP2006283322A JP2005102129A JP2005102129A JP2006283322A JP 2006283322 A JP2006283322 A JP 2006283322A JP 2005102129 A JP2005102129 A JP 2005102129A JP 2005102129 A JP2005102129 A JP 2005102129A JP 2006283322 A JP2006283322 A JP 2006283322A
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segment
water
water stop
sheet
expansion
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JP4500195B2 (en
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Ikuo Oe
郁夫 大江
Hisashi Nomoto
寿 野本
Kenji Mito
憲二 三戸
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Nishimatsu Construction Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To positively cut off water from a gap between an extended segment and each of peripheral segments, when the extended segment is thrust toward the natural ground. <P>SOLUTION: A water cutoff method for the extended segment 2 is provided for cutting off water from the gap between the extended segment 2 which is partially thrust from a segment ring lining the natural ground toward the natural ground, and each of the peripheral segments (external frame segments 3). A water cutoff sheet 4 is set to the peripheral segments so as to cover an external side of the extended segment 2, close to the natural ground, and when the extended segment 2 is thrust, the water cutoff sheet 4 exerts water cutoff performance while being pressed and expanded. Thus when the extended segment 2 is thrust, water cutoff at the gap between the extended segment 2 and each of the peripheral segments is positively achieved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、拡張セグメントの止水方法及び止水シート付き合成セグメントに関する。   The present invention relates to a water stop method for an expansion segment and a synthetic segment with a water stop sheet.

従来、シールドトンネルにおいて、例えば道路トンネルにおいて分合流部、非常駐車帯などを施工するために、セグメントリングを部分的に地山側に押し出すことが必要となる場合がある。   Conventionally, in a shield tunnel, for example, in order to construct a merging / merging portion, an emergency parking zone, etc. in a road tunnel, it may be necessary to partially push out the segment ring to the ground.

道路トンネルの分合流部の施工としては、例えば、シールドトンネルを並べて施工し、それぞれのシールドトンネルのセグメントリングから部分的に地山に拡張セグメントを押し出し、それらの拡幅セグメントを鋼殻で連結して行う方法がある。   As for the construction of the road junction, the shield tunnels are installed side by side, the extension segments are partially pushed out from the segment ring of each shield tunnel to the ground, and the widened segments are connected by steel shells. There is a way to do it.

また、非常駐車帯の施工としては、非常駐車帯部分で拡幅専用のセグメントを円形に組立て、その拡幅専用のセグメントを外側に押し出して拡幅部分を形成する方法がある（非特許文献１参照。）。   Moreover, as construction of an emergency parking zone, there is a method of assembling a segment exclusively for widening in an emergency parking zone portion into a circle and pushing the segment exclusively for widening outward to form the widened portion (see Non-Patent Document 1). .

この際、図３に示すように、拡張セグメント２とその周囲のセグメント（外枠セグメント３）との止水が問題となるが、従来は拡張セグメント２とその周囲のセグメント（外枠セグメント３）との間に、リング状の止水シール６を設置することが考えられていた。
あらゆる地下道路トンネルのニーズに対応した『道路トンネルシールドシステム』を開発、部分拡幅シールド工法［ＶＡＳＡＲＡシールド工法］参考資料３、２００３年５月９日、インターネット＜ｈｔｔｐ：／／ｗｗｗ．ｋａｊｉｍａ．ｃｏ．ｊｐ／ｎｅｗｓ／ｐｒｅｓｓ／２００３０５／９ｃ１ｆｏ−Ｊ．ｈｔｍ＞ At this time, as shown in FIG. 3, water stoppage between the extension segment 2 and the surrounding segment (outer frame segment 3) becomes a problem. Conventionally, the extension segment 2 and the surrounding segment (outer frame segment 3) are problematic. It was considered to install a ring-shaped water seal 6 between the two.
Developed “Road Tunnel Shield System” to meet the needs of every underground road tunnel, Partial Widening Shield Construction Method [VASARA Shield Construction Method] Reference Material 3, May 9, 2003, Internet <http: // www. kajima. co. jp / news / press / 200305 / 9c1fo-J. htm>

しかし，シールドトンネルの施工が大深度（土被り４０ｍ以深）になると、地下水圧が高くなるため，拡張セグメントを押し出す際の止水は容易ではなく、確実な止水方法が求められていた。   However, when the construction of the shield tunnel is deep (deep cover 40m or deeper), the groundwater pressure increases, so it is not easy to stop the water when pushing out the expansion segment, and a reliable water stopping method has been demanded.

本発明の課題は、拡張セグメントを地山側に押し出す際に、拡張セグメントとその周囲のセグメントとの間の止水を確実に行うことである。   An object of the present invention is to ensure water stoppage between an expansion segment and its surrounding segments when the expansion segment is pushed out to the natural ground side.

以上の課題を解決するため、請求項１に記載の発明は、例えば図１、２に示すように、覆工されたセグメントリングから部分的に地山側に押し出される拡張セグメント２とその周囲のセグメント（外枠セグメント３）との間を止水する拡張セグメント２の止水方法であって、前記周囲のセグメントに前記拡張セグメント２の地山側の外面を覆うように止水シート４を設置し、前記拡張セグメント２を押し出す際に前記止水シート４を押し広げながら止水することを特徴とする。   In order to solve the above-described problems, the invention according to claim 1 is, for example, as shown in FIGS. 1 and 2, an extended segment 2 that is partially pushed out from the lining segment ring to the ground and the surrounding segments. In the water stopping method of the extension segment 2 that stops water between the (outer frame segment 3), the water stop sheet 4 is installed on the surrounding segment so as to cover the outer surface of the expansion segment 2 on the natural ground side, When the expansion segment 2 is pushed out, the water stop sheet 4 is pushed and spread while being stopped.

このように、拡張セグメント２の地山側の外面を覆うように止水シート４を拡張セグメント２の周囲のセグメントに設置し、この止水シート４を押し広げながら拡張セグメント２を地山側に押し出すことにより、拡張セグメント２を押し出す際に、拡張セグメント２とその周囲のセグメントとの間の止水を確実に行うことができる。   In this way, the water stop sheet 4 is installed on the surrounding segments of the expansion segment 2 so as to cover the outer surface of the expansion segment 2 on the natural ground side, and the expansion segment 2 is pushed out to the natural ground side while spreading the water stop sheet 4. Thus, when the expansion segment 2 is pushed out, water can be reliably stopped between the expansion segment 2 and the surrounding segments.

ここで、地山側に押し出される拡張セグメントとしては、１つのセグメントにおいて部分的に押し出されるように組み込まれたもの、セグメントリングを構成するセグメントで押し出されるように組み立てられたものなどが挙げられる。さらに、このような拡張セグメントを軸方向又は周方向に複数連続して設け、順次押し出されるようなものも含まれる。   Here, as an expansion segment pushed out to the natural ground side, one that is incorporated so as to be partially pushed out in one segment, one that is assembled so as to be pushed out by a segment constituting the segment ring, and the like can be mentioned. Further, a plurality of such extended segments are continuously provided in the axial direction or the circumferential direction and are sequentially extruded.

請求項２に記載の発明は、例えば図１、２に示すように、請求項１に記載の拡張セグメント２の止水方法において、前記止水シート４を設置するとともに、この止水シート４の地山側を覆う保護板５を設けることを特徴とする。   The invention described in claim 2 is, for example, as shown in FIGS. 1 and 2, in the water stop method for the extension segment 2 according to claim 1, the water stop sheet 4 is installed and the water stop sheet 4 is A protective plate 5 that covers the natural mountain side is provided.

このように、周囲のセグメントに設置された止水シート４の地山側を覆うように保護板５を設けることにより、シールド掘進機のテールシールから止水シート４を保護することができる。   Thus, by providing the protection plate 5 so as to cover the ground mountain side of the waterproof sheet 4 installed in the surrounding segments, the waterproof sheet 4 can be protected from the tail seal of the shield machine.

請求項３に記載の発明の止水シート４付き合成セグメント１は、例えば図１、２に示すように、部分的に地山側に押し出される拡張セグメント２とその周囲の外枠セグメント３から構成される合成セグメント１であって、前記外枠セグメント３に前記拡張セグメント２の地山側の外面を覆うように設置され、前記拡張セグメント２を押し出す際に押し広げられながら、前記拡張セグメント２と前記外枠セグメント３との間を止水する止水シート４を備えることを特徴とする。   The synthetic segment 1 with the waterproof sheet 4 according to the third aspect of the invention comprises, for example, as shown in FIGS. 1 and 2, an extended segment 2 that is partially pushed out to the natural ground side and an outer frame segment 3 around it. The composite segment 1 is installed on the outer frame segment 3 so as to cover the outer surface of the expansion segment 2 on the ground mountain side, and is expanded when the expansion segment 2 is pushed out, and the expansion segment 2 and the outer segment A water stop sheet 4 for stopping water between the frame segments 3 is provided.

このように、拡張セグメント２の地山側の外面を覆うように止水シート４を外枠セグメント３に設置し、この止水シート４を押し広げながら拡張セグメント２を地山側に押し出すことにより、拡張セグメント２を押し出す際に、拡張セグメント２と外枠セグメント３との間の止水を確実に行うことができる。   In this way, the waterproofing sheet 4 is installed on the outer frame segment 3 so as to cover the outer surface of the expansion segment 2 on the natural ground side, and the expansion segment 2 is pushed out to the natural ground side while expanding the waterproofing sheet 4. When the segment 2 is pushed out, water can be reliably stopped between the expansion segment 2 and the outer frame segment 3.

請求項４に記載の発明は、例えば図１、２に示すように、請求項３に記載の止水シート４付き合成セグメント１において、止水シート４の地山側を覆う保護板５が設けられていることを特徴とする。   The invention described in claim 4 is, for example, as shown in FIGS. 1 and 2, in the synthetic segment 1 with the waterproof sheet 4 according to claim 3, a protective plate 5 is provided to cover the ground mountain side of the waterproof sheet 4. It is characterized by.

このように、外枠セグメント３に設置される止水シート４の地山側を覆うように保護板５を設けることにより、シールド掘進機のテールシールから止水シート４を保護することができる。   In this way, by providing the protective plate 5 so as to cover the ground mountain side of the waterproof sheet 4 installed in the outer frame segment 3, the waterproof sheet 4 can be protected from the tail seal of the shield machine.

本発明によれば、拡張セグメントの地山側の外面を覆うように止水シートを拡張セグメントの周囲のセグメントに設置し、この止水シートを押し広げながら拡張セグメントを押し出すため、拡張セグメントとその周囲のセグメントとの間の止水を確実に行うことができる。   According to the present invention, the water stop sheet is installed on the periphery of the expansion segment so as to cover the outer surface of the expansion segment on the natural ground side, and the expansion segment is pushed out while the water stop sheet is spread out. The water can be reliably stopped between the other segments.

以下、図を参照して本発明を実施するための最良の形態を詳細に説明する。
本実施の形態に係る止水シート付き合成セグメント１は、シールドトンネルの分合流部の施工に適用するものである。例えば、地中に並べて施工されたシールドトンネルにおいて、それぞれのセグメントリングから拡張セグメント２を押し出し、双方の拡張セグメント２を鋼殻で連結して双方のシールドトンネルを連続させて分合流部を構築する場合に適用する。 Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
The synthetic segment 1 with a water stop sheet according to the present embodiment is applied to the construction of the merging / merging portion of the shield tunnel. For example, in a shield tunnel constructed side by side in the ground, the extension segment 2 is pushed out from each segment ring, and both the extension segments 2 are connected by a steel shell so that both shield tunnels are connected to construct a branching junction. Applies to cases.

止水シート付き合成セグメント１は、図１、２に示すように、鋼製のものであり、部分的に地山側に押し出される拡張セグメント２と、その周囲の外枠セグメント３（周囲のセグメント）とから構成されている。拡張セグメント２は、外枠セグメント３に上下方向にスライド動作可能に組み込まれている。また、拡張セグメント２の押出しは、ジャッキ等により行うことができるようになっている。   As shown in FIGS. 1 and 2, the synthetic segment 1 with a water-stop sheet is made of steel, and an extended segment 2 that is partially pushed out to the natural ground side, and an outer frame segment 3 (surrounding segment) around it. It consists of and. The expansion segment 2 is incorporated in the outer frame segment 3 so as to be slidable in the vertical direction. Further, the extension segment 2 can be pushed out by a jack or the like.

そして、この拡張セグメント２の地山側の外面を覆うように、止水シート４が外枠セグメント３に設置されている。止水シート４の外端部は、拡張セグメント２側の地山側外面における内端部の全周にわたって水密に固定されている。なお、止水シート４は、予め拡張セグメント２の押出しにより所定の大きさ、形状に広がるように形成されている。   And the water stop sheet | seat 4 is installed in the outer frame segment 3 so that the outer surface of the natural mountain side of this expansion segment 2 may be covered. The outer end portion of the water blocking sheet 4 is fixed in a watertight manner over the entire circumference of the inner end portion on the outer surface of the natural mountain side on the expansion segment 2 side. In addition, the water stop sheet | seat 4 is previously formed so that it may spread in predetermined magnitude | size and shape by extrusion of the expansion segment 2. FIG.

セグメントリングの覆工時には、図２（ａ）に示すように、セグメントリングの外形線からわずかに内方に拡張セグメント２をスライドさせておき、その隙間に止水シート４を折り畳まれた状態で設置しておく。これにより、拡張セグメント２の押出し時には、図２（ｂ）に示すように、その押し出しに伴って止水シート４が折り畳んだ分だけ押し広げられて、押し出された拡張セグメント２の外面を膜状に覆う。このため，拡張セグメント２を押し出す際に、拡張セグメント２と外枠セグメント３との間の止水を確実にすることができる。   When lining the segment ring, as shown in FIG. 2 (a), the extended segment 2 is slid slightly inward from the outline of the segment ring, and the waterproof sheet 4 is folded in the gap. Install it. As a result, when the expansion segment 2 is extruded, as shown in FIG. 2B, the water stop sheet 4 is expanded by the amount of folding along with the extrusion, and the outer surface of the extended expansion segment 2 is formed into a film shape. Cover. For this reason, when pushing out the expansion segment 2, the water stop between the expansion segment 2 and the outer frame segment 3 can be ensured.

ここで、止水シート４としては、止水性を有するゴム、強化プラスチックなどによりシート状に成形されたものが挙げられる。柔軟性を有しているため、押し出される際にある程度変形可能である。   Here, as the water stop sheet | seat 4, what was shape | molded in the sheet form with the rubber | gum which has water stop, a reinforced plastic, etc. is mentioned. Since it has flexibility, it can be deformed to some extent when it is extruded.

さらに、止水シート４の外面側（地山側）には、その外面を覆うように保護板５が設けられている。これにより、シールド掘進機のテールシールからゴムシートを保護することができ、損傷を防いで止水シート４の止水性を確保することができる。   Further, a protective plate 5 is provided on the outer surface side (natural ground side) of the water stop sheet 4 so as to cover the outer surface. Thereby, a rubber sheet can be protected from the tail seal of a shield machine, damage can be prevented, and the waterproofness of the waterproof sheet 4 can be ensured.

なお、以上の実施の形態においては、本発明の拡張セグメントの止水方法を、シールドトンネルの分合流部の施工における、拡張セグメントを有する合成セグメントに適用したが、本発明はこれに限定されるものではなく、道路トンネルの非常駐車帯などのトンネル断面を拡幅する際にセグメントリングを構成するセグメントを拡張する際に適用しても良い。   In the embodiment described above, the water stop method for the extension segment of the present invention is applied to the composite segment having the extension segment in the construction of the merging / merging portion of the shield tunnel, but the present invention is limited to this. However, the present invention may be applied to expanding a segment constituting a segment ring when widening a tunnel cross section such as an emergency parking zone of a road tunnel.

また、止水シート４をゴム、強化プラスチックによって成形するようにしたが、これに限られるものではなく、止水性を確保でき、拡張セグメント２の押出しにより押し広げることが可能なものであればよい。また、保護板５も、これらの止水シート４を保護して損傷を防ぐことができるものであれば、その材質は問わない。その他、具体的な細部構造等についても適宜に変更可能であることは勿論である。   In addition, the water-stop sheet 4 is molded from rubber or reinforced plastic, but the present invention is not limited to this, and any water-proof sheet may be used as long as it can secure water-stop and can be expanded by extrusion of the expansion segment 2. . The protective plate 5 may be made of any material as long as it can protect the water-stopping sheet 4 and prevent damage. In addition, it is needless to say that specific detailed structures and the like can be appropriately changed.

本発明を適用した一実施の形態の構成を示す止水シート付き合成セグメントを示す斜視図である。It is a perspective view which shows the synthetic segment with a water stop sheet | seat which shows the structure of one Embodiment to which this invention is applied. 合成セグメントの状態を示す断面図であり、（ａ）はセグメントリングの覆工時、（ｂ）は、拡張セグメントの押出し時における合成セグメントの状態を示す。It is sectional drawing which shows the state of a synthetic | combination segment, (a) is at the time of the lining of a segment ring, (b) shows the state of the synthetic segment at the time of extrusion of an expansion segment. 従来の合成セグメントにおける止水方法を示す斜視図である。It is a perspective view which shows the water stop method in the conventional synthetic | combination segment.

符号の説明Explanation of symbols

１、１０ 合成セグメント
２ 拡張セグメント
３ 外枠セグメント（周囲のセグメント）
４ 止水シート
５ 保護板
６ 止水シール 1, 10 Composite segment 2 Expansion segment 3 Outer frame segment (surrounding segments)
4 Water stop sheet 5 Protection plate 6 Water stop seal

Claims (4)

覆工されたセグメントリングから部分的に地山側に押し出される拡張セグメントとその周囲のセグメントとの間を止水する拡張セグメントの止水方法であって、
前記周囲のセグメントに前記拡張セグメントの地山側の外面を覆うように止水シートを設置し、前記拡張セグメントを押し出す際に前記止水シートを押し広げながら止水することを特徴とする拡張セグメントの止水方法。 A water stop method for an expansion segment that stops water between an extension segment that is partially pushed out from the lining segment ring to the ground and the surrounding segments,
A water stop sheet is installed in the surrounding segment so as to cover the outer surface of the expansion segment on the natural ground side, and when the extension segment is pushed out, the water stop sheet is spread and the water is stopped while spreading. Water stop method. 前記止水シートを設置するとともに、この止水シートの地山側を覆う保護板を設けることを特徴とする請求項１に記載の拡張セグメントの止水方法。   2. The water stop method for an extension segment according to claim 1, wherein the water stop sheet is installed and a protection plate is provided to cover a ground mountain side of the water stop sheet. 部分的に地山側に押し出される拡張セグメントとその周囲の外枠セグメントから構成される合成セグメントであって、
前記外枠セグメントに前記拡張セグメントの地山側の外面を覆うように設置され、前記拡張セグメントを押し出す際に押し広げられながら、前記拡張セグメントと前記外枠セグメントとの間を止水する止水シートを備えることを特徴とする止水シート付き合成セグメント。 A composite segment composed of an extended segment that is partially pushed to the natural ground side and an outer frame segment around it,
A water-stop sheet that is installed on the outer frame segment so as to cover the outer surface of the expansion segment on the natural ground side, and stops the water between the expansion segment and the outer frame segment while being expanded when the expansion segment is pushed out. A synthetic segment with a waterproof sheet, characterized by comprising: 止水シートの地山側を覆う保護板が設けられていることを特徴とする請求項３に記載の止水シート付き合成セグメント。   The synthetic | combination segment with a water stop sheet | seat of Claim 3 provided with the protective plate which covers the natural mountain side of a water stop sheet | seat.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110778344A (en) * 2019-11-26 2020-02-11 中铁第四勘察设计院集团有限公司 Shield tunnel segment seam waterproof construction

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JPS5873693A (en) * 1981-10-27 1983-05-02 川崎重工業株式会社 Partial widening of tunnel due to shield construction method
JPS6448993A (en) * 1987-08-20 1989-02-23 Hitachi Construction Machinery Method of expansion shield construction and sealed type rotary cutter shielding machine used for said method and lining member
JP2005036547A (en) * 2003-07-16 2005-02-10 Maeda Corp Shield tunneling method, shield boring machine and widening segment using them

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873693A (en) * 1981-10-27 1983-05-02 川崎重工業株式会社 Partial widening of tunnel due to shield construction method
JPS6448993A (en) * 1987-08-20 1989-02-23 Hitachi Construction Machinery Method of expansion shield construction and sealed type rotary cutter shielding machine used for said method and lining member
JP2005036547A (en) * 2003-07-16 2005-02-10 Maeda Corp Shield tunneling method, shield boring machine and widening segment using them

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110778344A (en) * 2019-11-26 2020-02-11 中铁第四勘察设计院集团有限公司 Shield tunnel segment seam waterproof construction

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