JP3905280B2

JP3905280B2 - Inner lining structure of shield tunnel

Info

Publication number: JP3905280B2
Application number: JP2000033447A
Authority: JP
Inventors: 吉則浅沼; 修長谷川; 敬士小沼
Original assignee: 西武ポリマ化成株式会社
Priority date: 2000-02-10
Filing date: 2000-02-10
Publication date: 2007-04-18
Anticipated expiration: 2020-02-10
Also published as: JP2001220995A

Description

【０００１】
【発明の属する技術分野】
本発明は、鋼製セグメント、ＲＣセグメント等のセグメントを推進工法によりシールドトンネルの周方向および軸方向に連結してなるシールドトンネルの内面覆工構造に関し、特に導水トンネル、下水道管路等トンネル内を水が流れるシールドトンネルの内面覆工構造に関する。
【０００２】
【従来の技術】
従来この種のシールドトンネルは、図１３の部分断面図に示すように、一次覆工体は鋼製セグメントｂまたは（ＲＣセグメント）を連結することにより形成し、その管路内周側に内外圧に対抗できるコンクリートを打設して二次覆工体ｃを形成することにより、シールドトンネルａの耐久性、止水性の向上を計っている。
【０００３】
図１３のシールドトンネルは従来一般に用いられて来た型のものであるが、コンクリートからなる二次覆工体を設けたシールドトンネルは耐震性が弱いという問題点があり、最近この型にかわる種々の型のシールドトンネルの内面覆工構造が検討され、使用されている。
【０００４】
これらコンクリート二次覆工に代る内面覆工構造の中、一次覆工体が鋼製セグメントの場合は、図１４の部分断面図に示すような型のものが使用されている。このシールドトンネルｄは鋼製セグメントｅからなる一次覆工体の内周側に間隔をおいて内外圧に対応できるＦＲＰＭからなる内管ｆを配設し、この内管ｆと鋼製セグメントｅとの間の空間に内管ｆの位置固定と鋼製セグメント内面の防錆対策のためにエアーモルタルｇを充填してなるものである。
【０００５】
また一次覆工体としてＲＣセグメントを使用する型のシールドトンネルにおいては、二次覆工コンクリートを打設するかわりにＲＣセグメントの内周面を樹脂塗装することが提案されている。
【０００６】
【発明が解決しようとする課題】
前記従来のコンクリート打設により二次覆工体を形成する型のシールドトンネルは上記のとおり耐震性が劣り、また、鉄筋とコンクリートの打設に時間がかかり施工性も劣るという欠点もある。
【０００７】
また、前記鋼製セグメントの内周側にＦＲＰＭの内管を配置し、内管と鋼製セグメントの間にエアーモルタルを充填する型のシールドトンネルは、コンクリート打設による二次覆工型のものに比べて耐震性および施工性は向上しているが、ＦＲＰＭの内管は高価であるのでコスト高となる欠点がある。
【０００８】
さらに、ＲＣセグメントの内周面を樹脂塗装する型のシールドトンネルは塗装技術の限界から充分な厚みの塗膜を形成することが難しく、このため塗膜の剥離・破れが生じるおそれがあり、耐摩耗性も長期的には問題となる。また、トンネルが地震等により変形する場合は剛性が小さい継手部のみが変形するため、継手部に塗装された塗膜が局部伸びで破損するという問題点がある。
【０００９】
本発明は、上記従来のシールドトンネルの各内面覆工構造の問題点にかんがみなされたものであって、耐震性、施工性に優れ、かつ低コストで施工できるシールドトンネルの内面覆工構造を提供しようとするものである。
【００１０】
【課題を解決するための手段】
上記本発明の目的を達成するシールドトンネルの内面覆工構造は、鋼製セグメント、ＲＣセグメント等のセグメントを推進工法によりシールドトンネルの周方向および軸方向に連結してなるシールドトンネルの内面覆工構造であって、流水側の面が平滑な複数の内面覆工板を複数のセグメントからなる一次覆工体の内周面の全部または一部を覆うようにして隙間なく敷設し、内面覆工板取付金具の一端部を該内面覆工板に取付け、他端部を該一次覆工体を構成するセグメント同志を連結する締結部材または各セグメントの縦リブを介してセグメントに取付けることにより該内面覆工板を該一次覆工体に固定したことを特徴とする。
【００１１】
本発明の好ましい実施態様においては、内面覆工板は鉄板を内装したゴム板で形成することができる。
【００１２】
本発明の一側面において、該セグメント同志を連結する締結部材はシールドトンネルの軸方向に隣接する両セグメントの隣接する各リング間継手部に形成されたボルト孔に挿入されるボルトとこれに螺合するナットであり、該内面覆工板取付金具はシールドトンネルの軸方向に隣接する両内面覆工板の隣接する各端部においてシールドトンネルの軸方向に延長するようにして形成された取付金具挿入溝に挿入される板状の内面覆工板側取付端部と、該内面覆工板側取付端部から直交するようにして延長し、前記ボルトが挿通されるボルト挿通孔を有する板状のセグメント側取付端部からなるものである。
【００１３】
本発明の他の側面において、内面覆工板には所定の間隔で内面覆工板取付金具の一端部を収容するためのザグリ穴が所定の厚さを残して形成されており、該ザグリ穴の底部には内面覆工板取付金具のナットの径よりも小径の内面覆工板取付金具挿通孔が形成されており、該内面覆工板取付金具はほぼＬ字形の棒状部材であり、その一端部にはネジ部が形成され、該内面覆工板の内面覆工板取付金具挿通孔に挿通されて該ザグリ穴中に突出し、該ネジ部にはナットが螺合しており、他端部はセグメントの縦リブの立上り部から折曲したセグメント内周側端部の外周側に接するように配置されている。
【００１４】
【作用】
本発明によれば、流水側の面が平滑な複数の内面覆工板を一次覆工体の内周面の全部または一部を覆うようにして隙間なく敷設し、内面覆工板取付金具の一端部を内面覆工板に取付け、他端部を一次覆工体を構成するセグメント同志を連結する締結部材または各セグメントの縦リブを介してセグメントに取付けることにより内面覆工板を一次覆工体に固定するので、コンクリート打設による二次覆工体を省略しても内外圧に対抗できる二次覆工体を構成することができ、この内面覆工板として流水に対して充分な耐摩耗性を有する材料を選択することにより、従来のコンクリート打設による二次覆工体に比べて耐震性を向上させることができる。
【００１５】
また、内面覆工板のセグメントへの取付けは、セグメント同志を連結する締結部材（鋼製セグメントまたはＲＣセグメント）またはセグメントの縦リブ（鋼製セグメント）というセグメントに既設の構成部分を利用して行われるので、内面覆工板をセグメントに取付けるための取付手段は簡単な取付金具を使用して迅速かつ容易に行うことができ、従来のコンクリート打設により二次覆工体を形成する型のものおよびＦＲＰＭ内管およびエアーモルタルにより二次覆工体を形成する型のものに比べて施工が簡単であるとともに施工コストを大幅に低減することができる。
【００１６】
また内面覆工板は必要な摩耗代を板厚を調節することにより確保することができ、ＲＣセグメント内周面に樹脂塗装を施す場合に比べて充分な耐摩耗性を有し、塗膜の剥離・破損のおそれもない。
【００１７】
本発明の一実施態様において内面覆工板として鉄板を内装したゴム板を使用した場合は、合成樹脂板を使用した場合に比べて耐摩耗性に優れているので板厚を薄くすることができる上に曲面に加工することが容易であり大きな寸法の曲面板に加工することができるので、取付金具の取付箇所も少くてすむという長所がある。またＳＵＳ板等の鋼板を使用する場合に比べて軽量でトンネル内での取扱いが容易であり、また鋼製セグメントに使用しても異種金属の使用に帰因する鋼製セグメントの電食のおそれもない。
【００１８】
【発明の実施の形態】
以下添付図面を参照して本発明の実施の態様について説明する。
【００１９】
図１〜図７は本発明を鋼製セグメントについて適用した１実施態様を示すもので、図１はシールドトンネルの軸方向に隣接して相互に連結される鋼製セグメントの中図中手前側のセグメントを省略して示す正面図、図２は内面覆工板の正面図、図３は内面覆工板の平面図、図４は内面覆工板の取付金具挿入溝を示す図３中Ａ−Ａ矢視図、図５は内面覆工板取付金具を示す斜視図、図６は隣接する両鋼製セグメントに内面覆工板を取付けた状態を示す斜視図で、理解の便宜上図中右側のセグメントはそのリング間継手部のみを示し、内面覆工板も図示を省略している。また図７は内面覆工板の取付状態を示す断面図である。
【００２０】
円筒形のシールドトンネル１は複数の鋼製セグメント３を推進工法によりシールドトンネル１の周方向および軸方向に連結することにより構成され、これら鋼製セグメント３はシールドトンネル１の一次覆工体２を構成する。
【００２１】
内面覆工板４は、図２および図３に示すように、鋼製セグメント３の内周面の形状に合致する部分円筒状の曲面を有する長方形の板で、本実施態様においては図４から明らかなように外周側に鉄板５を内装したゴム板として構成されている。内面覆工板４のトンネル軸方向の長さは鋼製セグメント３のトンネル軸方向の長さと一致し、トンネル周方向の長さは鋼製セグメント３のトンネル周方向長さよりも小さく形成されている。
【００２２】
内面覆工板４は、図４から明らかなように、周方向中央部の軸方向両端部および４隅すなわち軸方向に隣接する内面覆工板と隣接する両端部において、トンネル軸方向に延長するようにして取付金具挿入溝６が内面覆工板４の厚み方向ほぼ中央部かつ内装された鉄板５よりも内周側に形成されている。取付金具挿入溝６の深さは内面覆工板取付金具７（図５）の内面覆工板側取付端部７ａのトンネル軸方向の長さＬ１の約１／２よりもやや大きく、その周方向長さは中央部の取付溝６において取付端部７ａの周方向長さＬ２よりも僅かに大きく、四隅の取付溝６において１／Ｌ２よりも僅かに大きく、また取付溝６のトンネル径方向の高さは取付端部７ａの厚さＴよりも僅かに大きく形成されている。
【００２３】
内面覆工板４の内周側（流水側）は流水との摩擦をできるだけ少くし摩耗を少くするために平滑な表面に形成されていることが好ましい。
【００２４】
なお、図１において、３′はセグメントの周方向接続部を構成する鋼製セグメントを示し、４′は内面覆工板の周方向接続部を構成する内面覆工板を示す。内面覆工板４′はその周方向長さが短く、中央の取付金具挿入溝６が省略されている以外は内面覆工板４と同一構造である。
【００２５】
内面覆工板取付金具７は取付金具挿入溝６に挿入される板状の内面覆工板側取付端部７ａと、これと直交するようにして取付端部７ａの中央部から延長する板状のセグメント側取付端部７ｂからなり、周方向断面において両取付端部７ａ、７ｂは、図７に示すように、Ｔ字形状である。
【００２６】
内面覆工板側取付端部７ａはそのトンネル軸方向長さＬ１の１／２の部分が隣接する両鋼製セグメント３、３の中の一方のセグメント３の取付金具挿入溝６内に挿入され、トンネル軸方向長さＬ１の１／２の残りの部分が他方のセグメント３の取付金具挿入溝６に挿入されるように形成されている。またセグメント側取付端部７ｂには締結部材を構成するリング間ボルト（後述）が挿通されるボルト挿通孔７ｃが形成されている。
【００２７】
この取付金具７を使用して内面覆工板４を鋼製セグメント３に取付けるには、図７に示すように、先に敷設された鋼製セグメント３−１の内周面を覆うようにして、かつ後続の鋼製セグメント３−２と隣接する側の端部が鋼製セグメント３−１のリング間継手部を構成する主桁８−１よりも所定長さだけ突出するようにして第１の内面覆工板４−１を配置する。主桁８−１のボルト挿通孔（図示せず）にはリング間ボルト９が予め挿通されている。次に後続の鋼製セグメント３−２を、その主桁８−２が鋼製セグメント３−１の主桁８−１と接触するようにして、また主桁８−２のボルト挿通孔（図示せず）にリング間ボルト９が挿通されるようにして敷設した後、内面覆工板取付金具７の内面覆工板側取付端部７ａのトンネル軸方向長さＬ１の１／２の部分を内面覆工板４−１の取付金具挿入溝６−１に挿入するとともに、セグメント側取付端部７ｂのボルト挿通孔７ｃ（図５）にリング間ボルト９を挿通するようにして、セグメント側取付端部７ｂを主桁８−２に接触させる。
【００２８】
次にナット１０をリング間ボルト９に螺合させ緊締することにより主桁８−１と８−２を相互に固定するとともに内面覆工板取付金具７を主桁８−１、８−２に固定する。その後第２の内面覆工板４−２の取付金具挿入溝６−２に内面覆工板取付金具の内面覆工板側取付端部７ａの長さＬ１の残りの長さ１／２の部分を挿入する。以下上記の施工手順を繰返すことにより内面覆工板４を鋼製セグメント３に固定して内面覆工構造を完成する。なお、図７において、１１は鋼製セグメント３−１、３−２の外周面を形成するスキンプレートを示す。
【００２９】
図８は本発明をＲＣセグメントに適用した実施態様を示すもので、隣接する両ＲＣセグメントに内面覆工板を取付けた状態を示す断面図である。図８において図１〜図７の実施態様と同一の構成部分は同一符号で示し、詳細な説明を省略する。
【００３０】
図８において、内面覆工板取付金具７は隣接するＲＣセグメント１２−１、１２−２のリング間継手部を構成する鉄板１３−１、１３−２を相互に固定するリング間ボルト９に螺合するナット１０と鉄板１３−２との間に挾まれた形で内面覆工板４−１、４−２をＲＣセグメント１２−１、１２−２に固定している。
【００３１】
図９〜図１２は本発明を鋼製セグメントに適用した他の実施態様を示すもので、図９は内面覆工板取付金具を示す斜視図、図１０は内面覆工板を鋼製セグメントに取付けた状態を示す部分斜視図、図１１は図１０中部分Ａを拡大して示す斜視図、図１２は鋼製セグメントに内面覆工板を取付けた状態を示す断面図である。
【００３２】
この実施態様において内面覆工板１３は鉄板１４を内装したゴム板で、トンネルの周方向および軸方向に所定間隔で、後述の内面覆工板取付金具の一端部を収容するためのザグリ穴１５が内装鉄板１４の内周側に所定の厚さを残して形成されており、ザグリ穴１５の底部１５ａ（図１１）には内面覆工板取付金具１６のナット１８の径よりも小径の内面覆工板取付金具挿通孔１９（図１２）が形成されている。
【００３３】
内面覆工板取付金具１６はほぼＬ字形の棒状部材であり、その一端部１７ａにはネジ部１７ａが形成され、内面覆工板１３の内面覆工板取付金具挿通孔１９に挿通されてザグリ穴１５中に突出し、ネジ部１７ａにはワッシャ２２を介してナット１８が螺合している。取付金具１６の他端部１７ｂは鋼製セグメント２３の縦リブ２０の立上り部２０ａから折曲したセグメント内周側端部２０ｂの外周側の面に接触するようにして配置されている。なお、図１０において、２４は鋼製セグメントのスキンプレート、２５は主桁、２６は内面覆工板１３の端部を支持する支持部材である。支持部材２６は縦リブ２０の内周側端部２０ｂと隣接する両内面覆工板１３の端部との間に介装されている。
【００３４】
この実施態様において内面覆工板１３を鋼製セグメント２３に取付けるには、取付金具１７を内面覆工板１３に取付けた後に取付金具の一端部１７ｂが縦リブ２０の内周側端部２０ｂの外周側の面に沿ってスライドするようにして内面覆工板１３を図１２中矢印Ｂ方向に移動し、所定位置に配置した後ナット１８を締めることにより内面覆工板１３を縦リブ２０にしっかりと固定する。
【００３５】
上記各実施態様においては、内面覆工板として鉄板を内装したゴム板を用いているが、内面覆工板としてはこの他合成樹脂やＳＵＳ板を用いることもできる。ただし合成樹脂板は硬質のため摩耗し易いので厚みをゴム板よりも大きくしなければならず、またＳＵＳ板は重量が大きくトンネル内での取扱いに重機が必要となる上に、鋼製セグメントに適用する場合は異種金属となり電食により錆びるという問題があるので、鉄板を内装して補強したゴム板がもっとも好ましい。
【００３６】
また上記実施態様においては内面覆工板を一次覆工体の内周面の全部を覆うようにして敷設しているが、流水と接する一次覆工体下部のみに敷設してもよい。
【００３７】
【発明の効果】
以上述べたように本発明によれば、流水側の面が平滑な複数の内面覆工板を一次覆工体の内周面の全部または一部を覆うようにして隙間なく敷設し、内面覆工板取付金具の一端部を内面覆工板に取付け、他端部を一次覆工体を構成するセグメント同志を連結する締結部材または各セグメントの縦リブを介してセグメントに取付けることにより内面覆工板を一次覆工体に固定するので、コンクリート打設による二次覆工体を省略しても内外圧に対抗できる二次覆工体を構成することができ、この内面覆工板として流水に対し充分な耐摩耗性を有する材料を選択することにより、従来のコンクリート打設による二次覆工体に比べて耐震性を向上させることができる。
【００３８】
また、内面覆工板のセグメントへの取付けは、セグメント同志を連結する締結部材（鋼製セグメントまたはＲＣセグメント）またはセグメントの縦リブ（鋼製セグメント）というセグメントに既設の構成部分を利用して行われるので、内面覆工板をセグメントに取付けるための取付手段は簡単な取付金具を使用して迅速かつ容易に行うことができ、従来のコンクリート打設により二次覆工体を形成する型のものおよびＦＲＰＭ内管およびエアーモルタルにより二次覆工体を形成する型のものに比べて施工が簡単であるとともに施工コストを大幅に低減することができる。
【００３９】
また内面覆工板は必要な摩耗代を板厚を調節することにより確保することができ、ＲＣセグメント内周面に樹脂塗装を施す場合に比べて充分な耐摩耗性を有し、塗膜の剥離・破損のおそれもない。
【００４０】
本発明の一実施態様において内面覆工板として鉄板を内装したゴム板を使用した場合は、合成樹脂板を使用した場合に比べて耐摩耗性に優れているので板厚を薄くすることができる上に曲面に加工することが容易であり大きな寸法の曲面板に加工することができるので、取付金具の取付箇所も少くてすむという長所がある。またＳＵＳ板等の鋼板を使用する場合に比べて軽量でトンネル内での取扱いが容易であり、また鋼製セグメントに使用しても異種金属の使用に帰因する鋼製セグメントの電食のおそれもない。
【図面の簡単な説明】
【図１】本発明の１実施態様を示す正面図である。
【図２】内面覆工板の正面図である。
【図３】内面覆工板の平面図である。
【図４】図３中Ａ−Ａ矢視図である。
【図５】内面覆工板取付金具を示す斜視図である。
【図６】鋼製セグメントに内面覆工板を取付けた状態を示す斜視図である。
【図７】内面覆工板の取付状態を示す断面図である。
【図８】本発明の他の実施態様を示す断面図である。
【図９】本発明の他の実施態様において使用する内面覆工板取付金具を示す分解斜視図である。
【図１０】同実施態様の斜視図である。
【図１１】図１０中Ａ部分の拡大斜視図である。
【図１２】同実施態様の断面図である。
【図１３】従来のシールドトンネルの内面覆工構造を示す断面図である。
【図１４】従来のシールドトンネルの他の内面覆工構造を示す断面図である。
【符号の説明】
１シールドトンネル
２一次覆工体
３、２３鋼製セグメント
４、１３内面覆工板
７、１６内面覆工板取付金具[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inner surface lining structure of a shield tunnel formed by connecting segments such as a steel segment and an RC segment in a circumferential direction and an axial direction of the shield tunnel by a propulsion method, and particularly in a tunnel such as a water conduit and a sewer pipe. The present invention relates to an inner lining structure of a shield tunnel through which water flows.
[0002]
[Prior art]
Conventionally, in this type of shield tunnel, as shown in the partial sectional view of FIG. 13, the primary lining body is formed by connecting the steel segments b or (RC segments), and the inner and outer pressures are formed on the inner peripheral side of the pipe. The durability of the shield tunnel a and the improvement of water stoppage are improved by placing the concrete that can resist the above and forming the secondary lining body c.
[0003]
Although the shield tunnel of FIG. 13 is of a type that has been generally used in the past, the shield tunnel provided with the secondary lining body made of concrete has a problem that the earthquake resistance is weak, and recently, there are various types that replace this type. The inner lining structure of the type of shield tunnel has been studied and used.
[0004]
In the inner surface lining structure that replaces the concrete secondary lining, when the primary lining body is a steel segment, the type shown in the partial sectional view of FIG. 14 is used. This shield tunnel d is provided with an inner pipe f made of FRPM which can cope with the inner and outer pressure at an inner peripheral side of the primary lining body made of the steel segment e, and this inner pipe f and the steel segment e The space between is filled with air mortar g to fix the position of the inner tube f and prevent rust on the inner surface of the steel segment.
[0005]
Further, in a shield tunnel of a type that uses an RC segment as a primary lining body, it has been proposed that the inner peripheral surface of the RC segment be resin-coated instead of placing secondary lining concrete.
[0006]
[Problems to be solved by the invention]
As described above, the shield tunnel of the type that forms the secondary lining body by the conventional concrete placement is inferior in earthquake resistance, and also has a drawback that it takes time to place the reinforcing bars and concrete and the workability is also inferior.
[0007]
The shield tunnel of the type in which the inner pipe of FRPM is arranged on the inner peripheral side of the steel segment and the air mortar is filled between the inner pipe and the steel segment is of a secondary lining type by concrete placement. Compared to the above, the earthquake resistance and workability are improved, but the FRPM inner pipe is expensive, so there is a disadvantage that the cost is increased.
[0008]
Furthermore, it is difficult for shield tunnels of the type in which the inner peripheral surface of the RC segment is coated with resin to form a sufficiently thick coating film due to the limitations of coating technology, which may cause peeling and tearing of the coating film. Abrasion is also a problem in the long term. In addition, when the tunnel is deformed due to an earthquake or the like, only the joint portion having low rigidity is deformed, so that the coating film coated on the joint portion is damaged due to local elongation.
[0009]
The present invention has been considered in view of the problems of the inner surface lining structure of the conventional shield tunnel, and provides an inner surface lining structure of the shield tunnel that is excellent in earthquake resistance and workability and can be constructed at low cost. It is something to try.
[0010]
[Means for Solving the Problems]
The shield tunnel inner surface lining structure that achieves the object of the present invention includes a shield tunnel inner surface lining structure in which segments such as steel segments and RC segments are connected in the circumferential direction and the axial direction of the shield tunnel by a propulsion method. A plurality of inner surface lining plates having a smooth surface on the running water side are laid without gap so as to cover all or part of the inner peripheral surface of the primary lining body composed of a plurality of segments. One end of the mounting bracket is attached to the inner surface covering plate, and the other end is attached to the segment via a fastening member for connecting the segments constituting the primary covering body or the vertical rib of each segment. A work plate is fixed to the primary lining body.
[0011]
In a preferred embodiment of the present invention, the inner surface lining plate can be formed of a rubber plate with an iron plate inside.
[0012]
In one aspect of the present invention, the fastening member that connects the segments is a bolt inserted into a bolt hole formed in each joint portion between adjacent rings of both segments adjacent to each other in the axial direction of the shield tunnel, and screwed to the bolt. The inner cover plate mounting bracket is inserted into the shield tunnel in the axial direction of the shield tunnel at each adjacent end of both inner cover plates adjacent in the axial direction of the shield tunnel. A plate-like inner surface lining plate side mounting end inserted into the groove, and a plate-like shape having a bolt insertion hole through which the bolt is inserted, extending perpendicularly from the inner surface lining plate side mounting end. It consists of a segment side attachment end.
[0013]
In another aspect of the present invention, a counterbore hole for accommodating one end portion of the inner surface cover plate mounting bracket at a predetermined interval is formed on the inner surface cover plate leaving a predetermined thickness. An inner surface lining plate mounting bracket insertion hole having a diameter smaller than the diameter of the nut of the inner surface lining plate mounting bracket is formed at the bottom of the inner surface lining plate mounting bracket, and the inner surface lining plate mounting bracket is a substantially L-shaped rod-shaped member, A threaded portion is formed at one end, and is inserted into the inner surface covering plate mounting bracket insertion hole of the inner surface covering plate and protrudes into the counterbored hole. A nut is screwed into the threaded portion, and the other end The part is arranged so as to contact the outer peripheral side of the end part on the inner peripheral side of the segment bent from the rising part of the vertical rib of the segment.
[0014]
[Action]
According to the present invention, a plurality of inner surface lining plates having a smooth surface on the running water side are laid without gap so as to cover all or part of the inner peripheral surface of the primary lining body, Primary lining of the inner lining board is attached by attaching one end to the inner lining board and attaching the other end to the segment via a fastening member that connects the segments constituting the primary lining body or the vertical rib of each segment. Because it is fixed to the body, it is possible to construct a secondary lining body that can resist internal and external pressures even if the secondary lining body by placing concrete is omitted. By selecting a material having wear properties, it is possible to improve the earthquake resistance as compared with a secondary lining body by conventional concrete placement.
[0015]
In addition, the inner lining plate is attached to the segment by using the existing components in the segment called the fastening member (steel segment or RC segment) or the vertical rib (steel segment) of the segment. Therefore, the attachment means for attaching the inner lining plate to the segment can be done quickly and easily using a simple mounting bracket, and is a type that forms a secondary lining body by conventional concrete placement In addition, the construction is simple and the construction cost can be greatly reduced as compared with the type in which the secondary lining body is formed by the FRPM inner pipe and the air mortar.
[0016]
In addition, the inner lining plate can secure the necessary wear allowance by adjusting the plate thickness, and has sufficient wear resistance compared with the case where resin coating is applied to the inner peripheral surface of the RC segment. There is no risk of peeling or damage.
[0017]
In one embodiment of the present invention, when a rubber plate with an iron plate is used as the inner surface lining plate, the plate thickness can be reduced because it is superior in wear resistance compared to the case of using a synthetic resin plate. Since it can be easily processed into a curved surface and can be processed into a curved plate having a large size, there is an advantage that the mounting location of the mounting bracket can be reduced. Also, it is lighter and easier to handle in tunnels than steel plates such as SUS plates, and there is a risk of steel corrosion due to the use of dissimilar metals even when used for steel segments. Nor.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0019]
1 to 7 show one embodiment in which the present invention is applied to a steel segment, and FIG. 1 is a front view of a middle section of steel segments connected to each other adjacent to each other in the axial direction of a shield tunnel. FIG. 2 is a front view of the inner surface lining plate, FIG. 3 is a plan view of the inner surface lining plate, and FIG. 4 is an A-in FIG. FIG. 5 is a perspective view showing an inner surface lining plate mounting bracket, and FIG. 6 is a perspective view showing a state in which the inner surface lining plate is attached to both adjacent steel segments. The segment shows only the joint part between the rings, and the illustration of the inner surface lining plate is also omitted. FIG. 7 is a cross-sectional view showing an attached state of the inner surface lining plate.
[0020]
The cylindrical shield tunnel 1 is formed by connecting a plurality of steel segments 3 in the circumferential direction and the axial direction of the shield tunnel 1 by a propulsion method. Constitute.
[0021]
As shown in FIGS. 2 and 3, the inner surface lining plate 4 is a rectangular plate having a partially cylindrical curved surface that matches the shape of the inner peripheral surface of the steel segment 3. As is apparent, the rubber plate is configured with an iron plate 5 on the outer peripheral side. The length of the inner surface lining plate 4 in the tunnel axis direction is the same as the length of the steel segment 3 in the tunnel axis direction, and the length in the tunnel circumferential direction is smaller than the length of the steel segment 3 in the tunnel circumferential direction. .
[0022]
As apparent from FIG. 4, the inner surface lining plate 4 extends in the tunnel axial direction at both axial ends of the central portion in the circumferential direction and at the four corners, that is, at both ends adjacent to the inner surface lining plate adjacent in the axial direction. In this way, the mounting bracket insertion groove 6 is formed on the inner peripheral side of the inner surface covering plate 4 in the thickness direction substantially in the center and on the interior of the iron plate 5. The depth of the mounting bracket insertion groove 6 is slightly larger than about ½ of the length L1 in the tunnel axis direction of the inner cover plate-side mounting end 7a of the inner cover plate mounting bracket 7 (FIG. 5). The length in the direction is slightly larger than the circumferential length L2 of the mounting end 7a in the mounting groove 6 at the center, slightly larger than 1 / L2 in the mounting grooves 6 at the four corners, and the tunnel radial direction of the mounting groove 6 Is formed to be slightly larger than the thickness T of the attachment end 7a.
[0023]
It is preferable that the inner peripheral side plate 4 (flowing water side) is formed on a smooth surface in order to minimize friction with flowing water and reduce wear.
[0024]
In FIG. 1, 3 'represents a steel segment constituting the circumferential connection portion of the segment, and 4' represents an inner surface covering plate constituting the circumferential connection portion of the inner surface covering plate. The inner lining plate 4 ′ has a short circumferential length, and has the same structure as the inner lining plate 4 except that the central mounting bracket insertion groove 6 is omitted.
[0025]
The inner surface covering plate mounting bracket 7 is a plate-shaped inner surface covering plate side mounting end portion 7a inserted into the mounting bracket insertion groove 6 and a plate shape extending from the center portion of the mounting end portion 7a so as to be orthogonal thereto. In the circumferential cross section, both the attachment end portions 7a and 7b are T-shaped as shown in FIG.
[0026]
The inner lining plate side mounting end 7a is inserted into the mounting bracket insertion groove 6 of one of the two steel segments 3 and 3 adjacent to the half of the tunnel axial length L1. The other half of the length L1 in the tunnel axis direction is formed so as to be inserted into the mounting bracket insertion groove 6 of the other segment 3. In addition, a bolt insertion hole 7c through which a bolt between rings (described later) constituting the fastening member is inserted is formed in the segment side attachment end portion 7b.
[0027]
In order to attach the inner surface covering plate 4 to the steel segment 3 using the mounting bracket 7, as shown in FIG. 7, the inner peripheral surface of the steel segment 3-1 previously laid is covered. And the end adjacent to the subsequent steel segment 3-2 protrudes by a predetermined length from the main beam 8-1 constituting the inter-ring joint of the steel segment 3-1. The inner surface lining plate 4-1 is disposed. An inter-ring bolt 9 is inserted in advance in a bolt insertion hole (not shown) of the main beam 8-1. Next, the subsequent steel segment 3-2 is set so that its main girder 8-2 is in contact with the main girder 8-1 of the steel segment 3-1, and the bolt insertion hole (see FIG. (Not shown) is laid so that the inter-ring bolt 9 is inserted, and then a half of the tunnel axial direction length L1 of the inner surface covering plate side mounting end 7a of the inner surface covering plate mounting bracket 7 is Insert into the mounting bracket insertion groove 6-1 of the inner surface lining plate 4-1, and insert the bolt 9 between the rings into the bolt insertion hole 7c (FIG. 5) of the segment side mounting end 7b. The end 7b is brought into contact with the main beam 8-2.
[0028]
Next, the main girders 8-1 and 8-2 are fixed to each other by screwing and tightening the nut 10 to the inter-ring bolt 9, and the inner surface lining plate mounting bracket 7 is attached to the main girders 8-1 and 8-2. Fix it. Thereafter, the remaining half of the length L1 of the inner surface covering plate side mounting end portion 7a of the inner surface covering plate mounting bracket in the mounting bracket insertion groove 6-2 of the second inner surface covering plate 4-2. Insert. The inner surface lining plate 4 is fixed to the steel segment 3 by repeating the above construction procedure to complete the inner surface lining structure. In addition, in FIG. 7, 11 shows the skin plate which forms the outer peripheral surface of steel segments 3-1, 3-2.
[0029]
FIG. 8 shows an embodiment in which the present invention is applied to an RC segment, and is a cross-sectional view showing a state in which an inner cover plate is attached to both adjacent RC segments. 8, the same components as those in the embodiment of FIGS. 1 to 7 are denoted by the same reference numerals, and detailed description thereof is omitted.
[0030]
In FIG. 8, the inner surface lining plate mounting bracket 7 is screwed onto the inter-ring bolt 9 that fixes the iron plates 13-1 and 13-2 constituting the joint portion between the rings of the adjacent RC segments 12-1 and 12-2. The inner surface covering plates 4-1 and 4-2 are fixed to the RC segments 12-1 and 12-2 in a shape sandwiched between the nut 10 and the iron plate 13-2.
[0031]
9 to 12 show another embodiment in which the present invention is applied to a steel segment. FIG. 9 is a perspective view showing an inner surface lining plate mounting bracket, and FIG. 10 is an inner surface lining plate as a steel segment. FIG. 11 is an enlarged perspective view showing a portion A in FIG. 10, and FIG. 12 is a cross-sectional view showing a state in which an inner surface lining plate is attached to a steel segment.
[0032]
In this embodiment, the inner surface lining plate 13 is a rubber plate with an iron plate 14 provided therein, and a counterbore hole 15 for accommodating one end portion of an inner surface lining plate mounting bracket described later at predetermined intervals in the circumferential direction and the axial direction of the tunnel. Is formed on the inner peripheral side of the interior iron plate 14 leaving a predetermined thickness, and the bottom 15a (FIG. 11) of the counterbore hole 15 has an inner surface smaller than the diameter of the nut 18 of the inner surface covering plate mounting bracket 16. A lining plate mounting bracket insertion hole 19 (FIG. 12) is formed.
[0033]
The inner surface lining plate mounting bracket 16 is a substantially L-shaped rod-shaped member, and a screw portion 17a is formed at one end portion 17a of the inner surface lining plate 13 and is inserted into the inner surface lining plate mounting bracket insertion hole 19 to be counterbored. The nut 18 protrudes into the hole 15 and is screwed into the threaded portion 17a via the washer 22. The other end 17b of the mounting bracket 16 is disposed so as to contact the outer peripheral surface of the segment inner peripheral end 20b bent from the rising portion 20a of the vertical rib 20 of the steel segment 23. In FIG. 10, 24 is a steel segment skin plate, 25 is a main girder, and 26 is a support member that supports an end portion of the inner surface lining plate 13. The support member 26 is interposed between the inner peripheral side end portion 20 b of the vertical rib 20 and the end portions of both inner surface covering plates 13 adjacent to each other.
[0034]
In this embodiment, in order to attach the inner surface lining plate 13 to the steel segment 23, after attaching the mounting bracket 17 to the inner surface lining plate 13, the one end portion 17b of the mounting bracket is connected to the inner peripheral side end portion 20b of the vertical rib 20. The inner surface covering plate 13 is moved in the direction of arrow B in FIG. 12 so as to slide along the outer peripheral surface, and after being placed at a predetermined position, the nut 18 is tightened to turn the inner surface covering plate 13 into the vertical rib 20. Secure firmly.
[0035]
In each of the above embodiments, a rubber plate with an iron plate installed therein is used as the inner surface lining plate, but other synthetic resins and SUS plates can also be used as the inner surface lining plate. However, since the synthetic resin plate is hard and easily worn, the thickness must be larger than that of the rubber plate. The SUS plate is heavy and requires heavy machinery for handling in the tunnel. When it is applied, there is a problem that it becomes a dissimilar metal and rusts due to electrolytic corrosion. Therefore, a rubber plate reinforced with an iron plate is most preferable.
[0036]
Moreover, in the said embodiment, although the inner surface covering board is laid so that the whole inner peripheral surface of a primary covering body may be covered, you may lay only in the lower part of the primary covering body which touches flowing water.
[0037]
【The invention's effect】
As described above, according to the present invention, a plurality of inner surface lining plates having a smooth surface on the running water side are laid without gaps so as to cover all or part of the inner peripheral surface of the primary lining body. Inner surface lining by attaching one end of the work plate mounting bracket to the inner surface lining plate and attaching the other end to the segment via the fastening members that connect the segments constituting the primary lining body or the vertical ribs of each segment Since the plate is fixed to the primary lining body, it is possible to construct a secondary lining body that can resist internal and external pressures even if the secondary lining body by concrete placement is omitted. On the other hand, by selecting a material having sufficient abrasion resistance, it is possible to improve the earthquake resistance as compared with a secondary lining body by conventional concrete placement.
[0038]
In addition, the inner lining plate is attached to the segment by using the existing components in the segment called the fastening member (steel segment or RC segment) or the vertical rib (steel segment) of the segment. Therefore, the attachment means for attaching the inner lining plate to the segment can be done quickly and easily using a simple mounting bracket, and is a type that forms a secondary lining body by conventional concrete placement In addition, the construction is simple and the construction cost can be greatly reduced as compared with the type in which the secondary lining body is formed by the FRPM inner pipe and the air mortar.
[0039]
In addition, the inner lining plate can secure the necessary wear allowance by adjusting the plate thickness, and has sufficient wear resistance compared with the case where resin coating is applied to the inner peripheral surface of the RC segment. There is no risk of peeling or damage.
[0040]
In one embodiment of the present invention, when a rubber plate with an iron plate is used as the inner surface lining plate, the plate thickness can be reduced because it is superior in wear resistance compared to the case of using a synthetic resin plate. Since it can be easily processed into a curved surface and can be processed into a curved plate having a large size, there is an advantage that the mounting location of the mounting bracket can be reduced. Also, it is lighter and easier to handle in tunnels than steel plates such as SUS plates, and there is a risk of steel corrosion due to the use of dissimilar metals even when used for steel segments. Nor.
[Brief description of the drawings]
FIG. 1 is a front view showing one embodiment of the present invention.
FIG. 2 is a front view of an inner surface lining board.
FIG. 3 is a plan view of an inner surface lining plate.
4 is a view taken in the direction of arrows AA in FIG. 3;
FIG. 5 is a perspective view showing an inner surface lining plate mounting bracket.
FIG. 6 is a perspective view showing a state where an inner surface lining plate is attached to a steel segment.
FIG. 7 is a cross-sectional view showing an attached state of the inner surface lining board.
FIG. 8 is a cross-sectional view showing another embodiment of the present invention.
FIG. 9 is an exploded perspective view showing an inner surface lining plate mounting bracket used in another embodiment of the present invention.
FIG. 10 is a perspective view of the same embodiment.
11 is an enlarged perspective view of a portion A in FIG.
FIG. 12 is a cross-sectional view of the same embodiment.
FIG. 13 is a cross-sectional view showing an inner surface lining structure of a conventional shield tunnel.
FIG. 14 is a cross-sectional view showing another inner surface lining structure of a conventional shield tunnel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shield tunnel 2 Primary lining body 3, 23 Steel segment 4, 13 Inner surface lining board 7, 16 Inner surface lining board mounting bracket

Claims

A shield tunnel inner surface lining structure in which segments such as steel segments and RC segments are connected in a circumferential direction and an axial direction of the shield tunnel by a propulsion method, and a plurality of inner surface lining plates with a smooth surface on the flowing water side Is installed without any gaps so as to cover all or part of the inner peripheral surface of the primary lining body composed of a plurality of segments, and one end of the inner surface lining plate mounting bracket is attached to the inner surface lining plate, and the other end portion An inner surface covering of a shield tunnel in which the inner surface covering plate is fixed to the primary covering body by attaching the inner surface covering plate to the segment via a fastening member for connecting the segments constituting the primary covering body or a vertical rib of each segment. in the structure, the inner surface lining structure characteristics and be Resid over field tunnel that is inner surface lining plate is a rubber plate having interior an iron plate.

A shield tunnel inner surface lining structure in which segments such as steel segments and RC segments are connected in a circumferential direction and an axial direction of the shield tunnel by a propulsion method, and a plurality of inner surface lining plates with a smooth surface on the flowing water side Is installed without any gaps so as to cover all or part of the inner peripheral surface of the primary lining body composed of a plurality of segments, and one end of the inner surface lining plate mounting bracket is attached to the inner surface lining plate, and the other end portion An inner surface covering of a shield tunnel in which the inner surface covering plate is fixed to the primary covering body by attaching the inner surface covering plate to the segment via a fastening member for connecting the segments constituting the primary covering body or a vertical rib of each segment. insertion in the structure, the bolt insertion hole formed in the joint portion between the ring fastening member adjacent the both segments adjacent in the axial direction of the shield tunnel connecting the segments comrades The inner cover plate mounting bracket extends in the axial direction of the shield tunnel at each adjacent end of both inner cover plates adjacent in the axial direction of the shield tunnel. A plate-shaped inner surface covering plate side mounting end inserted into the mounting bracket insertion groove formed in this manner, and a bolt through which the bolt extends and extends perpendicularly from the inner surface covering plate side mounting end inner surface lining structure characteristics and be Resid over field tunnel that a plate-like segment side attachment end having an insertion hole.

A shield tunnel inner surface lining structure in which segments such as steel segments and RC segments are connected in a circumferential direction and an axial direction of the shield tunnel by a propulsion method, and a plurality of inner surface lining plates with a smooth surface on the flowing water side Is installed without any gaps so as to cover all or part of the inner peripheral surface of the primary lining body composed of a plurality of segments, and one end of the inner surface lining plate mounting bracket is attached to the inner surface lining plate, and the other end portion An inner surface covering of a shield tunnel in which the inner surface covering plate is fixed to the primary covering body by attaching the inner surface covering plate to the segment via a fastening member for connecting the segments constituting the primary covering body or a vertical rib of each segment. In the structure, a counterbore hole for accommodating one end of the inner surface cover plate mounting bracket at a predetermined interval is formed on the inner surface cover plate leaving a predetermined thickness, and at the bottom of the counterbore hole Inside An inner surface lining plate mounting bracket insertion hole having a diameter smaller than the diameter of the nut of the work plate mounting bracket is formed, and the inner surface lining plate mounting bracket is a substantially L-shaped rod-shaped member, and a screw portion is provided at one end thereof. Is formed, is inserted into the inner surface cover plate mounting bracket insertion hole of the inner surface cover plate, protrudes into the counterbore, the nut is screwed into the screw portion, and the other end is a vertical rib of the segment inner surface lining structure characteristics and be Resid over field tunnels that are placed in contact with the outer peripheral side of the segment inner peripheral side end portion which is bent from the rising portion of the.