JP2001082088A - Expansion segment and extending mechanism for expansion segment - Google Patents
Expansion segment and extending mechanism for expansion segmentInfo
- Publication number
- JP2001082088A JP2001082088A JP26113199A JP26113199A JP2001082088A JP 2001082088 A JP2001082088 A JP 2001082088A JP 26113199 A JP26113199 A JP 26113199A JP 26113199 A JP26113199 A JP 26113199A JP 2001082088 A JP2001082088 A JP 2001082088A
- Authority
- JP
- Japan
- Prior art keywords
- main girder
- segment
- plate
- main
- girder
- 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.)
- Ceased
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は拡径セグメント及び
拡径セグメントの伸張機構に関するものであり、特に、
セグメントを拡径することによりセグメントリングを直
接地山に密着し、地山荷重を該セグメントリングが直接
受けることができる拡径セグメント及び拡径セグメント
の伸張機構に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an enlarged diameter segment and an extension mechanism of the enlarged diameter segment.
The present invention relates to a diameter-expanding segment and a mechanism for expanding the diameter-expansion segment, in which a segment ring is brought into close contact with the ground by expanding the diameter of the segment, and the ground ring can directly receive the ground load.
【０００２】[0002]
【従来の技術】従来、シールド工法又はトンネルボーリ
ングマシン（ＴＢＭ）によるトンネル工法に用いられる
セグメントは、シールド機等の掘削機の後方で円形状に
組み立てられ、且つ、該セグメントが地山に押し出され
た状態では、該セグメントの外面と該地山との間に空隙
（テールボイド）が生じており、該地山に該セグメント
が密着していない。そのため、該テールボイドに充填材
を裏込め注入して該地山から作用する土・水圧を充填材
の硬化物を通して該セグメントで支保している。2. Description of the Related Art Conventionally, a segment used for a tunneling method using a shield method or a tunnel boring machine (TBM) is assembled in a circular shape behind an excavator such as a shield machine, and the segment is extruded to the ground. In this state, a gap (tail void) is formed between the outer surface of the segment and the ground, and the segment is not in close contact with the ground. Therefore, the filler is backfilled and injected into the tail void, and the soil and water pressure acting from the ground are supported by the segment through the cured material of the filler.
【０００３】又、図１６に示す従来のセグメントリング
ＳR の組立方法は、セグメント継手面がトンネル半径方
向として両隣のセグメントに接合するＡ2 セグメントを
トンネル下部に配設し、その上方左右にＡ1 セグメント
を配設し、更に、その上方左右にトンネル天端のＫセグ
メントと接合するＢセグメントを配設して最後に該Ｋセ
グメントを組み立てる。その際、該Ｋセグメントをトン
ネル内側から半径方向に移動してリングを形成するた
め、該Ｋセグメントと該Ｂセグメントの継手板の取付角
αは、該Ｋセグメントの中心角の半分の角度θに余裕角
を加えて決定される角度とする。[0003] Furthermore, the assembly method of the conventional segment ring S R shown in FIG. 16, the A 2 segment segment joint surfaces are joined on both sides of the segment as a tunnel radially arranged in the tunnel bottom, A thereabove left One segment is arranged, and further, a B segment to be joined to the K segment at the top of the tunnel is arranged on the left and right above the segment, and finally the K segment is assembled. At this time, since the K segment is moved from the inside of the tunnel in the radial direction to form a ring, the mounting angle α of the joint plate between the K segment and the B segment is set to an angle θ that is half the central angle of the K segment. The angle is determined by adding a margin angle.
【０００４】一方、該セグメントを該地山に密着させる
ため、該セグメントのスキンプレート外面にスキンプレ
ートと略同一曲率を有する円弧状の外板を設け、該外板
をスキンプレート内面に設けた外板押し上げ機構の操作
で押し上げる拡径セグメントの伸張機構がある。（実開
昭５５−１４０５９４号公報）On the other hand, an arc-shaped outer plate having substantially the same curvature as the skin plate is provided on the outer surface of the skin plate of the segment in order to bring the segment into close contact with the ground, and the outer plate is provided on the inner surface of the skin plate. There is an extension mechanism of the enlarged diameter segment which is pushed up by the operation of the plate pushing up mechanism. (Japanese Utility Model Publication No. 55-140594)
【０００５】[0005]
【発明が解決しようとする課題】前記セグメントと地山
との間のテールボイドを充填材で裏込め注入し、地山の
作用荷重を該充填材の硬化物を通して該セグメントで支
保するものは大量の充填材を必要とし、その材料費及び
施工費が嵩む、又、該充填材が液状で注入するものに対
しては、注入時に於てトンネル覆工内側に充填材が漏れ
ないように覆工の水密性を確保する必要が生ずる。The tail void between the segment and the ground is filled with a filler to fill the tail void, and the load applied to the ground through the cured material of the filler is supported by the segment in a large amount. Filling material is required, and the material cost and construction cost are increased. In addition, when the filling material is injected in a liquid state, the lining should be used so that the filling material does not leak inside the tunnel lining at the time of injection. It becomes necessary to ensure watertightness.
【０００６】又、従来の天端セグメントを最後に組み立
てるセグメントリング組立方法は、トンネルの上部から
作用する鉛直荷重に対して、天端セグメントの継手が強
度上の弱点となっていた。一方、セグメントのスキンプ
レート外面にスキンプレートと略同一曲率を有する円弧
状の外板を設け、該セグメントを地山に密着させる拡径
セグメントの伸張機構は構造が複雑で、且つ、部材数も
多いため製作コストが増大する。In the conventional segment ring assembling method for assembling the top segment last, the joint of the top segment is weak in strength against a vertical load acting from the upper part of the tunnel. On the other hand, an arc-shaped outer plate having substantially the same curvature as the skin plate is provided on the outer surface of the skin plate of the segment, and the expanding mechanism of the enlarged diameter segment that makes the segment adhere to the ground has a complicated structure and a large number of members. Therefore, the manufacturing cost increases.
【０００７】そこで、テールボイドに充填材を裏込め注
入することなく、セグメントを直接地山に容易に密着で
き、且つ、天端セグメントの継手の強度上の弱点も生じ
ない拡径セグメント及び構造がシンプルで安価に製作す
ることができ、更に、取り付け取り外し作業が容易に行
うことができる拡径セグメントの伸張機構を得るために
解決すべき技術的課題が生じてくるのであり、本発明は
該課題を解決することを目的とする。Therefore, the segments can be easily adhered directly to the ground without backfilling and filling the tail void with the filler, and the enlarged-diameter segment and the structure that do not cause the weakness in the strength of the joint of the top end segment are simple. In addition, a technical problem to be solved arises in order to obtain an expanding mechanism of the enlarged-diameter segment that can be easily manufactured and attached and removed, and the present invention solves the problem. The purpose is to solve.
【０００８】[0008]
【課題を解決するための手段】本発明は上記目的を達成
するために提案せられたものであり、施工すべきトンネ
ル内周面に沿って円弧状に分割され、且つ、該トンネル
の切羽側から坑口側へ設置されるセグメントであって、
該セグメントのリング方向に所定間隔で主桁を配設し、
且つ、該主桁間の所定箇所に補強材を設けられる拡径セ
グメントに於て、一方のセグメントの該主桁の内側から
円周方向に所定長さの内主桁を突出させると共に、他方
のセグメントの該主桁は、該内主桁の外面と円周方向に
該主桁の内側をスライド可能に形成し、更に、一方のセ
グメントの内側であって、該切羽側の該主桁の先端に仮
継手板を設けると共に、該切羽側の該主桁に対峙する他
方のセグメントの該主桁の内側先端にも該仮継手板を設
け、該仮継手板同士を当接するように形成する拡径セグ
メント、及び、前記一方のセグメントと他方のセグメン
トの該仮継手板の半径方向の取付角度は、該一方のセグ
メントの中心角の半分の角度と余裕角を加えて決定され
る角度とする拡径セグメント、及び、一方のセグメント
の主桁内側から円周方向に所定長さの内主桁を突出させ
ると共に、他方のセグメントの該主桁は、該内主桁の外
面と円周方向に該主桁の内側をスライド可能に形成した
一方のセグメントと他方のセグメントの該主桁間に配設
される伸張ジャッキによる拡径セグメントの伸張機構で
あって、予め、該主桁の側部材の所定箇所の内側に軸固
定具を固着し、一方、該主桁の内側側面に沿って鉛直に
該主桁の下部材から上部材まで袴板を設けると共に、該
袴板の上部には該主桁の該上部材の上面に沿って所定長
さの台座板を固着し、該台座板の中央部には該伸張ジャ
ッキと軸着した上方主桁把持板を該主桁の該上部材に当
接させる貫通孔を開穿し、且つ、該台座板の上部には該
上方主桁把持板を軸着する支持板を設けると共に、該袴
板の上部近傍の内側には該主桁の該上部材の下面に沿う
ように所定長さの下方主桁把持板を固着し、更に、該袴
板と該軸固定具とを軸で固定し、該伸張ジャッキが伸張
したとき、該上方主桁把持板と該下方主桁把持板とで該
主桁の該上部材の上・下面を把持する拡径セグメントの
伸張機構、及び、一方のセグメントの主桁内側から円周
方向に所定長さの内主桁を突出させると共に、他方のセ
グメントの該主桁は、該内主桁の外面と円周方向に該主
桁の内側をスライド可能に形成した一方のセグメントと
他方のセグメントの該主桁間に配設される伸張ジャッキ
による拡径セグメントの伸張機構であって、予め、該主
桁の側部材の所定箇所の内側に軸固定具を固着し、一
方、該主桁の内側側面に沿って鉛直に該主桁の下部材か
ら上方へ向けて袴板を設けると共に、該袴板と伸張ジャ
ッキとを軸着し、且つ、該袴板の内側には、該主桁の上
部材の下面に沿うように所定長さの上支圧板を固着し、
更に、該主桁の該下部材の上面に沿うように所定長さの
下支圧板を固着し、該袴板と該軸固定具とを軸で固定
し、該伸張ジャッキが伸張したとき、該上支圧板と該下
支圧板とを該主桁の該上・下部材にそれぞれ当接する拡
径セグメントの伸張機構、及び一方のセグメントの主桁
内側から円周方向に所定長さの内主桁を突出させると共
に、他方のセグメントの該主桁は、該内主桁の外面と円
周方向に該主桁の内側をスライド可能に形成した一方の
セグメントと他方のセグメントの該主桁間に配設される
伸張ジャッキによる拡径セグメントの伸張機構であっ
て、予め、該主桁の上部材の所定箇所にピン孔を開穿
し、一方、該主桁の内側側面に沿って鉛直に該主桁の下
部材から上方へ向けて袴板を設けると共に、該袴板と該
伸張ジャッキとを軸着し、且つ、該袴板の内側には、該
主桁の該上部材の下面に沿うように所定長さの上支圧板
を固着し、更に、該主桁の該下部材の上面に沿うように
所定長さの下支圧板を固着すると共に、該上支圧板には
該主桁の該ピン孔と一致する位置にピン孔を開穿し、該
主桁と該袴板とを該上支圧板に挿入されるピンで固定
し、該伸張ジャッキが伸張したとき、該上支圧板と該下
支圧板とを該主桁の該上・下部材にそれぞれ当接する拡
径セグメントの伸張機構を提供するものである。SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and is divided into arcs along the inner peripheral surface of a tunnel to be constructed, and is provided on the face side of the tunnel. From the to the wellhead side,
The main girder is arranged at a predetermined interval in the ring direction of the segment,
And, in a diameter-enlarging segment in which a reinforcing material is provided at a predetermined position between the main girders, an inner main girder of a predetermined length is protruded in a circumferential direction from inside the main girder of one segment, and The main girder of the segment is formed so that the inside of the main girder is slidable in the circumferential direction with the outer surface of the inner main girder, and further, the tip of the main girder inside one segment and on the face side. And a temporary joint plate is also provided at the inner end of the main girder of the other segment facing the main girder on the face side, and the temporary joint plate is formed so as to abut each other. The radial segment and the radial attachment angle of the temporary joint plate between the one segment and the other segment are set to an angle determined by adding a half angle of the center angle of the one segment and a margin angle. Diameter segment and circle from inside of main girder of one segment The main girder of a predetermined length is protruded in the direction, and the main girder of the other segment is slidable inside the main girder with the outer surface of the inner main girder in the circumferential direction. An extension mechanism of a diameter-enlarging segment provided by an extension jack disposed between the main girder of the segment of the main girder, wherein a shaft fixing member is fixed in advance inside a predetermined portion of a side member of the main girder, A skirt plate is provided vertically from the lower member to the upper member of the main girder along the inner side surface of the girder, and a pedestal plate of a predetermined length is provided on the upper part of the skirt member along the upper surface of the upper member of the main girder. A through hole is provided in the center of the pedestal plate to allow an upper main girder gripping plate axially attached to the extension jack to abut on the upper member of the main girder; A support plate for pivotally mounting the upper main girder gripping plate is provided, and the main girder of the main girder is provided near an upper portion of the skirt plate. A lower main girder holding plate of a predetermined length is fixed along the lower surface of the member, and further, the hakama plate and the shaft fixing device are fixed by a shaft, and when the extension jack is extended, the upper main girder holding plate is held. Plate and the lower main girder gripping plate, the extension mechanism of the enlarged diameter segment for gripping the upper and lower surfaces of the upper member of the main girder, and a predetermined length in the circumferential direction from the inside of the main girder of one of the segments. With the main girder protruding, the main girder of the other segment is slidable inside the main girder with the outer surface of the inner main girder in the circumferential direction. An extension mechanism of an enlarged diameter segment by an extension jack disposed in advance, wherein a shaft fixing tool is fixed in advance inside a predetermined portion of a side member of the main girder, while along an inner side surface of the main girder. A hakama plate is provided vertically upward from the lower member of the main girder, and the An upper support plate having a predetermined length is fixed to the inside of the hakama plate along the lower surface of the upper member of the main girder,
Further, a lower supporting plate of a predetermined length is fixed along the upper surface of the lower member of the main girder, the hakama plate and the shaft fixing device are fixed by a shaft, and when the extending jack is extended, An extension mechanism of an enlarged-diameter segment in which the upper support plate and the lower support plate abut on the upper and lower members of the main girder, respectively, and an inner main girder having a predetermined length in the circumferential direction from the inside of the main girder of one segment. And the main girder of the other segment is disposed between the main girder of one segment and the other girder formed so as to be slidable inside the main girder with the outer surface of the inner main girder. An extension mechanism for an enlarged diameter segment by an extension jack provided, wherein a pin hole is previously formed in a predetermined portion of an upper member of the main girder, while the main girder is vertically extended along an inner side surface of the main girder. A hakama plate is provided upward from the lower member of the girder, and the hakama plate and the extension jack are pivotally mounted. In addition, an upper support plate of a predetermined length is fixed to the inside of the skirt plate along the lower surface of the upper member of the main girder, and furthermore, a predetermined pressure is set along the upper surface of the lower member of the main girder. While fixing the lower supporting plate of length, a pin hole is formed in the upper supporting plate at a position corresponding to the pin hole of the main girder, and the main girder and the skirt plate are attached to the upper supporting plate. The present invention provides an extension mechanism of an enlarged segment in which the upper support plate and the lower support plate abut on the upper and lower members of the main girder when the extension jack is extended by fixing with an inserted pin. It is.
【０００９】[0009]
【発明の実施の形態】以下、本発明の一実施の形態を図
１乃至図１５に従って詳述する。図１はセグメントリン
グＳR を構成する各セグメントＳK ，ＳBL，ＳA の斜視
図である。図１（ａ）はトンネル天端に配設されるＳK
セグメントを示し、リング方向に施工すべきトンネルの
曲率に対応して湾曲しているチャンネル鋼材からなる主
桁１，１を所定間隔で配設し、円周方向の両端部には該
セグメントリングＳR を形成するための鋼板からなる継
手板４，４を設け、該継手板４，４の中央部には所定間
隔に継手孔となるボルト孔５，５，５を開穿する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a perspective view of each of the segments S K , S BL , and S A constituting the segment ring S R. Fig. 1 (a) shows the S K installed at the top of the tunnel.
A main girder 1, 1 made of a channel steel material which is curved corresponding to the curvature of a tunnel to be constructed in a ring direction is disposed at a predetermined interval, and the segment rings S are provided at both ends in the circumferential direction. Joint plates 4 and 4 made of a steel plate for forming R are provided, and bolt holes 5, 5 and 5 serving as joint holes are formed at predetermined intervals in the center of the joint plates 4 and 4.
【００１０】尚、該継手板４，４の接合面は図４（ｂ）
に示すようにトンネルの半径方向と一致させる。このよ
うにして両隣のセグメントと接合すれば、トンネルの上
部から作用する鉛直荷重に対して、該ＳK セグメントの
継手の強度は大きくなる。これは、該セグメントリング
ＳR に発生する軸力が継手に作用した場合、軸力の作用
する方向と該継手板４，４の接合面が垂直であるので、
耐荷特性に秀れているためである。更に、図１（ａ）に
示すように該主桁１，１間の所定箇所に断面がＬ字型の
鋼材からなる補強材３，３…を固着する。又、該ＳK セ
グメントの外面には、トンネルの上壁面からの肌落ち等
を防止する円弧状の鋼板からなるスキンプレート６を該
主桁１，１、該継手板４，４及び該補強材３，３…に固
着する。尚、図中の８は運搬時等に使用する吊手金具を
示し、該ＳK セグメントの中央部の該補強材３に設け
る。The joint surfaces of the joint plates 4 are shown in FIG.
As shown in the figure. In this way, the junction with the neighboring segments, with respect to the vertical load acting from the top of the tunnel, the strength of the joint of the S K segments increases. This is because when the axial force generated in the segment ring S R is applied to the joint, the junction plane direction and該継hand plate 4, 4 acting axial force is vertical,
This is because they have excellent load-bearing characteristics. Further, as shown in FIG. 1 (a), reinforcing members 3, 3... Made of a steel material having an L-shaped cross section are fixed at predetermined positions between the main girders 1, 1. Also, the S on the outer surface of the K segment, the main girder 1,1 skins plate 6 made of arc-shaped steel plate to prevent skin dropping or the like from the upper wall surface of the tunnel,該継hand plate 4, 4 and stiffener Stick to 3,3 ... Incidentally, 8 in the figure shows the hanger bracket to be used for transportation or the like, provided in the reinforcing member 3 of the central portion of the S K segments.
【００１１】次に、図１（ｂ）はトンネル左側に配設さ
れるＳBLセグメントを示す。前記Ｓ K セグメントと同様
に該主桁１，１及び該補強材３，３…の構成部材は同じ
であるが、両側の該主桁１，１のチャンネル鋼材の刃先
を切羽側に向けて配設し、且つ、該継手板４は該ＳK セ
グメントの該継手板４に対峙する上部のみに設け、該継
手板４，４同士を接合するためのボルト孔５，５，５を
開穿する。又、該ＳBLセグメントの中心より上部外面だ
けに溶接金網７を該主桁１，１間に固着してトンネル壁
からの肌落ち等を防止する。更に、該主桁１，１の下部
先端は後述の仮継手板９の取付角αに合せて切断すると
共に、該ＳBLセグメントをトンネル円周方向に拡張する
ために、後述のＳA セグメントの該主桁１，１内を円周
方向にスライドできる内主桁２，２を該ＳBLセグメント
の該主桁１，１の先端より円弧状に所定長さ突出させて
固着する。該内主桁２，２の断面は図６に示すようにチ
ャンネル鋼材の刃先の内側に鋼材２ａを溶着して、□型
形状に形成すると共に、その上部のチャンネル鋼材のウ
エブ背面を該ＳBLセグメントの該主桁１，１であるチャ
ンネル鋼材のウエブの内側に溶着し、該内主桁２の他方
を下方に突出させる。又、該主桁１の切羽側の先端部で
あり、該内主桁２を固着した反対側の該主桁１のチャン
ネル鋼材のウエブ背面に所定長さのアングル部材からな
る仮継手板１０を該アングル部材の刃先を上に向けて固
着する。該仮継手板１０は、後述のＳ A セグメントの仮
継手板９と対峙して設けられて、接合面同士を当接して
該仮継手板９，１０に設けるボルト孔１１にボルト（図
示せず）を挿入して締結する。該仮継手板９，１０は後
述するように、該ＳBLセグメントと該ＳA セグメントと
を仮組みする時のみに使用し、該セグメントリングＳR
を拡径する時には該ボルトを撤去する。該仮継手板９，
１０の半径方向の取付角αは図４（ｂ）に示すように、
該ＳBLセグメントの中心角の半分の角度θと組立てのた
めの余裕角を加えた角度とで決定し、該アングル部材の
背面で構成される接合面をセグメント内径より外径に向
ってテーパをつけて組立てし易くする。又、該ＳBLセグ
メントの中央部の該補強材３にも該吊手金具８を設け
る。尚、図示は省略するが、セグメントリングＳR を形
成するために該セグメントリングＳR の右側に配設する
該ＳBLセグメントと左・右対称に形成する後述のＳBRセ
グメントも必要となる。Next, FIG. 1 (b) shows the arrangement on the left side of the tunnel.
SBLIndicates a segment. Said S KSame as segment
The main girder 1, 1 and the reinforcing members 3, 3,.
However, the cutting edge of the channel steel material of the main girders 1, 1 on both sides
Are arranged toward the face side, and the joint plate 4 isKC
Segment only at the upper part facing the joint plate 4,
Bolt holes 5, 5, 5 for joining hand plates 4, 4
Pierce. Also, the SBLUpper outside than the center of the segment
The welding wire mesh 7 is fixed between the main girders 1 and 1 and
Prevents skin from falling off. Further, the lower part of the main girder 1,1
When the tip is cut according to the mounting angle α of the temporary joint plate 9 described later,
Together, the SBLExtend the segment in the circumferential direction of the tunnel
Therefore, SAA circumference within the main girder 1,1 of the segment
The inner main girders 2, 2 that can slide in the directionBLsegment
Projecting a predetermined length in an arc shape from the tip of the main girder 1, 1
Stick. The cross section of the inner main girders 2, 2 is as shown in FIG.
Weld the steel 2a inside the cutting edge of the channel steel,
It is formed into a shape, and the channel steel material
Eb back to the SBLThe chunk that is the main digit 1,1 of the segment
Welded to the inside of the web of tunnel steel, and the other of the inner main girder 2
Project downward. Also, at the tip of the main girder 1 on the face side,
The main girder 1 on the opposite side to which the inner main girder 2 is fixed.
An angled member of a specified length is
The temporary joint plate 10 is fixed with the cutting edge of the angle member facing upward.
To wear. The temporary joint plate 10 is made of S AProvisional segment
It is provided to face the joint plate 9, and
Bolts (see FIG. 1) are inserted into bolt holes 11 provided in the temporary joint plates 9 and 10.
(Not shown). The temporary joint plates 9 and 10 are
As described, the SBLSegment and the SASegment and
Is used only when temporarily assembling, and the segment ring SR
When expanding the diameter, remove the bolt. The temporary joint plate 9,
As shown in FIG. 4B, the mounting angle α in the radial direction of
The SBLThe angle θ is half of the central angle of the segment.
The angle is determined by adding the margin angle to the angle member.
The joint surface consisting of the back faces from the segment inner diameter to the outer diameter.
To make it easier to assemble. Also, the SBLSeg
The hanging metal fitting 8 is also provided on the reinforcing member 3 at the center of the
You. Although not shown, the segment ring SRThe shape
The segment ring SRTo the right of
The SBLS to be described later formed symmetrically to the left and right with the segmentBRC
Is also needed.
【００１２】次に、図１（ｃ）はトンネル下部に配設さ
れるＳA セグメントを示す。前記Ｓ BLセグメントの該主
桁１，１と同様に円弧状に所定間隔でチャンネル鋼材を
配設し、該主桁１，１間の所定箇所に前記同様の該補強
材３，３…を固着する。Next, FIG. 1 (c) shows a structure provided below the tunnel.
SAIndicates a segment. Said S BLThe main of the segment
Channel steel material is formed at predetermined intervals in an arc shape like girder 1 and 1.
And reinforced at a predetermined position between the main girders 1 and 1 as described above.
The members 3, 3, ... are fixed.
【００１３】尚、該チャンネル鋼材の刃先は、前記ＳBL
セグメントの該内主桁２，２をガイドするように該ＳBL
セグメントの該主桁１，１と同じ方向に設置する。又、
該主桁１，１の両端部は該仮継手板９の取付角αに合せ
て切断すると共に、切羽側の該主桁１の両端部には、前
記したＳBLセグメントの該仮継手板１０と対峙する位置
に接合面を当接して所定長さのアングル部材からなる仮
継手板９を固着する。該仮継手板９の上部には前記した
ように、該ＳBLセグメントの該仮継手板１０と仮組みす
るためのボルト孔１１を開穿する。又、該ＳA セグメン
トの中央部にも該吊手金具８を設ける。[0013] Incidentally, the cutting edge of the channel steel, the S BL
The S BL to guide inner main girder 2,2 segment
The segments are installed in the same direction as the main girders 1,1. or,
With both ends of the main girder 1, 1 is cut to match the α mounting angle of the provisional joint plate 9, the ends of the main girder 1 working face side, the temporary joint plate 10 of the S BL segments the A temporary joint plate 9 made of an angle member having a predetermined length is fixed by abutting the joining surface at a position facing the position. As the top of the temporary joint plate 9 mentioned above, to perforated in the bolt holes 11 for temporarily assembled with provisional joint plate 10 of the S BL segment. Also, provision of the hanging hand fitting 8 to the central portion of the S A segment.
【００１４】次に、図２に従いセグメントリングＳR の
形成方法を説明する。最初にトンネルのインバート部に
該ＳA セグメントを設置し、次に右側上方へＳBRセグメ
ントを、天端部にＳK セグメントを配設して、最後にＳ
BLセグメントを配設する順序でリングを組立てる。その
際、ＳK セグメントは後述の掘削機４１のデッキ（図示
せず）に支持するので落下することはない。尚、前記し
たように、トンネル天端のＳK セグメントの継手板４，
４をトンネルの半径方向として両隣の該ＳBLセグメント
及び該ＳBRセグメントと接合するので、トンネルの上部
から作用する鉛直荷重に対し継手の強度は大きい。[0014] Next, a method of forming the segment ring S R in accordance with FIG. First, the S A segment is installed at the invert part of the tunnel, then the S BR segment is installed at the upper right side, the S K segment is installed at the top end, and finally the S S segment is installed.
Assemble the rings in the order in which the BL segments are to be placed. At that time, the SK segment is not dropped because it is supported by a deck (not shown) of the excavator 41 described later. Incidentally, as described above, the S K segments of the tunnel top end joint plate 4,
4 since the joining with neighboring the S BL segments and said S BR segment as radial tunnel, the strength of the joint with respect to the vertical load acting from the top of the tunnel is large.
【００１５】ここで、最後に組立てる該ＳBLセグメント
の組立手順を説明する。該ＳBLセグメントは該吊手金具
８により該掘削機４１のエレクター（図示せず）に保持
されてトンネルの内側より所定の位置近傍に配設される
が、先ず、図１に示す該ＳBLセグメントの該ＳK セグメ
ント側の該継手板４のトンネル内径側のＸ線と該ＳKセ
グメントの該継手板４の下部線とを接して、該Ｘ線を回
転中心として該ＳBLセグメントの下部をトンネル内側よ
り所定の位置まで回転移動すると共に図２に示すよう
に、該ＳBLセグメントの切羽側の該主桁１の外面と該Ｓ
A セグメントの切羽側の該主桁１の外面との距離Ｈを該
主桁１の幅と組立てのためのクリアランスとを加えた距
離だけずらした位置でリング方向の位置決めを行う。
尚、リング方向の位置決めは回転移動と水平移動とを前
後させてもよい。この位置決めの時、該ＳA セグメント
の該主桁１上に該ＳBLセグメントの該仮継手板１０を載
置出来るので、該ＳBLセグメントは安定した状態とな
り、且つ、該主桁１と該仮継手板１０の取付角αとする
ことにより該ＳBLセグメントの組立てが容易に行うこと
ができる。その後、該ＳBLセグメントをトンネル軸方向
に切羽側から坑口側へ移動して図３に示すように、該仮
継手板１０を該ＳA セグメントの該仮継手板９上の接合
面の該ボルト孔１１と一致させてボルト、ナット（図示
せず）で締結して、該セグメントリングＳR を形成す
る。その際、上部の該ＳK セグメントの該継手板４と該
ＳBLセグメントの該継手板４同士もボルト、ナットで締
結する。Here, the procedure for assembling the SBL segment to be assembled last will be described. The S BL segment is held by the erector of the excavator 41 (not shown) by the hanging hand bracket 8 is arranged at a predetermined position near than the inner tunnel, firstly, the S BL shown in FIG. 1 in contact with the lower line of the X-ray segment the S tunnel inner diameter side of the K segment side該継hand plate 4 and the S K segment該継hand plate 4, the lower portion of the S BL segment as the center of rotation of the X-ray the as shown in FIG. 2 along with rotation movement from the tunnel inside to a predetermined position, the S main girder 1 of the outer surface of the working face side of the BL segment and the S
Positioning in the ring direction is performed at a position where the distance H between the face of the A segment and the outer surface of the main girder 1 is shifted by a distance obtained by adding the width of the main girder 1 and the clearance for assembly.
The positioning in the ring direction may be performed such that the rotational movement and the horizontal movement are moved back and forth. When this positioning, so come置出placing a provisional joint plate 10 of the S BL segments on the main girder 1 of the S A segment, the S BL segment becomes a stable state, and, the main girder 1 and the By setting the mounting angle α of the temporary joint plate 10, the SBL segment can be easily assembled. Thereafter, the S BL segments moves from the working face side in the tunnel axis to the wellhead side as shown in FIG. 3, the bolt of the joint surface on the provisional joint plate 9 of the S A segment of the temporary joint plate 10 to match the holes 11 and bolts, and fastened by a nut (not shown), to form the segment ring S R. At that time, the upper portion of the S K segment該継hand plate 4 and the S BL該継hand plate 4 together also bolt segments are fastened with nuts.
【００１６】図５は該ＳBLセグメントを拡径する際に、
該ＳBLセグメントに固着されている該内主桁２がスムー
ズに移動できるための振れ防止材１２の設置状態を示
し、該振れ防止材１２は坑口側の該ＳA セグメントの該
主桁１の先端部近傍に設置する。図６は該振れ防止材１
２の設置部の断面を示し、該主桁１内に該内主桁２を挿
入した後、該内主桁２を伸張する前に該主桁１のチャン
ネル鋼材の刃先間に所定幅の鋼板を溶着して設置する。[0016] Figure 5 is when expanded the S BL segment,
The S internal main beam 2 which is fixed to BL segment shows the installation state of prevention material 12 shake for can move smoothly, it shakes preventing member 12 is of the S A segment of the wellhead side of the main girder 1 Install near the tip. FIG. 6 shows the anti-vibration material 1
2 shows a cross section of an installation portion of a steel plate having a predetermined width between the cutting edges of channel steel material of the main girder 1 after the inner main girder 2 is inserted into the main girder 1 and before the inner main girder 2 is extended. Weld and install.
【００１７】次に、該セグメントリングＳR の拡径方法
を説明する。先ず、該ＳA セグメントと該ＳBLセグメン
ト及びＳBRセグメントの該仮継手板９，１０との仮組ボ
ルトを外す。その後、図７に示すようにＳBLセグメント
とＳA セグメントの継手間を跨いで伸張ジャッキ２０を
配設する拡径セグメントの伸張機構を設置し、該伸張ジ
ャッキ２０の伸張力を該主桁１に伝えて該ＳBLセグメン
トと該ＳA セグメントの継手間を拡径する。該伸張ジャ
ッキ２０を配設した該伸張機構の設定位置は、基本的に
は切羽側及び坑口側両方の該主桁１，１のトンネル内側
とし、又、該伸張ジャッキ２０のロッド側の取付部は該
ＳBLセグメントの該仮継手板１０の上方近傍とし、シリ
ンダー側の取付部は該仮継手板９，１０が接合した時の
該内主桁２の先端近傍とする。[0017] Next, the expanded method of the segment ring S R. First, remove the S A segment and the S BL segments and provisional-assembly bolt with provisional joint plates 9 and 10 of the S BR segment. Then, set up a stretching mechanism of the diameter expansion segments arranged decompression jack 20 across the inter-S BL segment and S A segment of the joint as shown in FIG. 7, the main girder 1 the stretching force of該伸Zhang jack 20 It conveyed to diameter between the S BL segment and the S a segment of the joint. The setting position of the extension mechanism in which the extension jack 20 is disposed is basically inside the tunnel of the main girder 1, 1 on both the face side and the wellhead side, and the mounting portion of the extension jack 20 on the rod side. said the upper vicinity of the temporary joint plate 10 of S BL segment, the mounting portion of the cylinder side and near the tip of the inner main beam 2 when the provisional joint plates 9 and 10 are joined.
【００１８】該伸張ジャッキ２０のロッド側及びシリン
ダー側の取付部の構造は同じとし、図８（ａ），（ｂ）
によりシリンダー側の取付部を説明する。該主桁１のチ
ャンネル鋼材の側部材１ｂであるウエブ内側中央部に予
め、該伸張機構を後述の軸２９によって該主桁１に仮固
定するための軸固定具３０となるナットを溶着する。一
方、該主桁１のチャンネル鋼材の刃先側に沿って、鉛直
に該主桁１の下部材１ｃとなるフランジから上部材１ａ
となるフランジ間に所定幅の袴板２６を設け、更に、該
袴板２６の上部に該主桁１の該上部材１ａの上面に沿う
ように該上部材１ａとクリアランスを取って台座板２５
を図８（ｂ）に示すように該袴板２６と断面Ｌ字形とな
るように固着する。又、該台座板２５の中央部には該伸
張ジャッキ２０とピン２１で軸着された上方主桁把持板
２２を該主桁１の該上部材１ａ上の移動を確保し、且
つ、該上方主桁把持板２２の下端部が該上部材１ａに当
接するように貫通孔２５ａを開穿する。更に、該台座板
２５の上部には該上方主桁把持板２２をピン２４で軸着
するために所定間隔に配設される支持板２３，２３を設
ける。又、該袴板２６の該主桁１側の上部には、該上部
材１ａのフランジ下面に沿うように該上部材１ａとクリ
アランスを取って所定長さの下方主桁把持板２７を設け
ると共に、該下方主桁把持板２７を補強するために所定
間隔で該袴板２６と固着して補強板３１，３１を設け
る。尚、台座板２５と該下方主桁把持板２７の長手方向
の長さは、該伸張機構が安定して設置できる長さとす
る。更に、該袴板２６の中央部近傍の前記軸固定具３０
と対応する位置に該袴板２６を仮留めするための軸２９
となる仮留めボルトのボルト孔２８を開穿する。該仮留
めボルト２９を該主桁１のナット３０に螺合すれば、該
伸張機構が該主桁１に仮固定される。前記セグメントリ
ングＳR の拡径が完了した際には、該仮留めボルト２９
と該ナット３０との螺合を解除すれば容易に該伸張機構
を取り外すことができる。The extension jack 20 has the same structure on the rod side and on the cylinder side in the mounting portion.
The mounting part on the cylinder side will be described below. A nut serving as a shaft fixing tool 30 for temporarily fixing the extension mechanism to the main girder 1 by means of a shaft 29 described below is welded to the center portion of the inner side of the web, which is the side member 1b of the channel steel material of the main girder 1. On the other hand, along the cutting edge side of the channel steel material of the main girder 1, vertically from the flange which becomes the lower member 1 c of the main girder 1, the upper member 1 a
A skirt plate 26 having a predetermined width is provided between the flanges, and a pedestal plate 25 is formed on the upper portion of the skirt plate 26 by taking a clearance with the upper member 1a along the upper surface of the upper member 1a of the main girder 1.
Is fixed to the skirt plate 26 so as to have an L-shaped cross section as shown in FIG. In the center of the pedestal plate 25, an upper main girder holding plate 22 pivotally attached to the extension jack 20 and the pin 21 is used to secure the movement of the main girder 1 on the upper member 1a, and A through hole 25a is formed so that the lower end of the main girder holding plate 22 contacts the upper member 1a. Further, support plates 23, 23 are provided at an upper portion of the pedestal plate 25 at predetermined intervals in order to fix the upper main girder gripping plate 22 with the pins 24. In addition, a lower main girder holding plate 27 of a predetermined length is provided on the upper part of the skirt plate 26 on the main girder 1 side along the lower surface of the flange of the upper member 1a with a clearance from the upper member 1a. In order to reinforce the lower main girder gripping plate 27, reinforcing plates 31, 31 are fixedly attached to the skirt plate 26 at predetermined intervals. The length of the pedestal plate 25 and the lower main girder holding plate 27 in the longitudinal direction is set to a length at which the extension mechanism can be stably installed. Further, the shaft fixture 30 near the center of the hakama plate 26
A shaft 29 for temporarily fixing the hakama plate 26 at a position corresponding to
The bolt hole 28 of the temporary fixing bolt is formed. When the temporary fixing bolt 29 is screwed into the nut 30 of the main girder 1, the extension mechanism is temporarily fixed to the main girder 1. When the diameter expansion of the segment ring S R is completed, the temporary fixing bolt 29
When the screwing between the nut and the nut 30 is released, the extension mechanism can be easily removed.
【００１９】図９（ａ），（ｂ）は該伸張ジャッキ２０
が伸張した時の該上方主桁把持板２２の傾動状態を示
し、該上方主桁把持板２２は該伸張ジャッキ２０が伸張
すると、該ピン２４を中心にβ°回転して下部の一端が
該主桁１の該上部材１ａのフランジ上面に当接すると共
に、該下方主桁把持板２７が上方へ移動して該主桁１の
該上部材１ａのフランジ下面に当接して、該上方主桁把
持板２２と該下方主桁把持板２７とで該主桁１の該上部
材１ａを把持して拡径を容易に行うことができる。FIGS. 9A and 9B show the extension jack 20.
3 shows the tilted state of the upper main girder gripping plate 22 when the upper main girder gripping plate 22 is extended, and when the extension jack 20 is extended, the upper main girder gripping plate 22 rotates β ° around the pin 24 and one end of the lower part is The lower main girder gripping plate 27 moves upward and abuts on the lower surface of the flange of the upper member 1a of the main girder 1 and contacts the upper main girder. The upper member 1a of the main girder 1 can be gripped by the gripping plate 22 and the lower main girder gripping plate 27 to facilitate the diameter expansion.
【００２０】図１０は該伸張ジャッキ２０を所定量伸ば
し拡径を完了した状態を示し、該セグメントリングＳR
が地山に十分当接することになる。尚、図示は省略する
が、前記したように坑口側の該主桁１，１間にも該伸張
ジャッキ２０を設けて拡径する。又、図１０に於ては、
前記溶接金網７も図示を省略する。この該伸張ジャッキ
２０の伸張量を保持した状態に於て、図６に示すように
該ＳA セグメントの該主桁１の内側と該内主桁２との重
合部を溶着等で固着して拡径を完了する。[0020] Figure 10 shows the completed expanded stretched a predetermined amount該伸Zhang jack 20, the segment ring S R
Will come into full contact with the ground. Although not shown, the extension jack 20 is also provided between the main girders 1 and 1 on the wellhead side to expand the diameter as described above. Also, in FIG.
The illustration of the welding wire mesh 7 is also omitted. At a state of holding the expansion amount of the該伸Zhang jack 20, and fixed by welding or the like to the polymerization unit with the S A inside and inner main beam 2 of the main girder 1 segment as shown in FIG. 6 Complete the expansion.
【００２１】図１１は前記重合部の溶着に代えてボルト
１４，１４，１４，１４で固着した状態を示し、又、図
１２は図１１のハー断面を示し、該重合部の該主桁１，
１のチャンネル鋼材のウエブ中央背面側に所定間隔で予
め、ナット１６，１６，１６，１６を溶着する。更に、
該ナット１６，１６，１６，１６に対応する位置の該内
主桁２，２（２ａ，２ａ）には、該内主桁２，２（２
ａ，２ａ）の長手方向に長孔１３，１３，１３，１３を
開穿する。該該ＳBLセグメントを拡径した後、該内主桁
２の該鋼板２ａ，２ａ側にワッシャ１５を介して該ボル
ト１４，１４，１４，１４を挿入して該主桁１，１側の
該ナット１６，１６，１６，１６で締結して該内主桁
２，２を該主桁１，１に固着する。FIG. 11 shows a state in which the overlapping portion is fixed by bolts 14, 14, 14, and 14 in place of welding, and FIG. 12 shows a cross section of the harness in FIG. ,
Nuts 16, 16, 16, 16 are previously welded at predetermined intervals to the center rear side of the web of the channel steel material. Furthermore,
The inner main girders 2, 2 (2a, 2a) at positions corresponding to the nuts 16, 16, 16, 16 are provided with the inner main girders 2, 2 (2a
The long holes 13, 13, 13, 13 are opened in the longitudinal direction of a, 2a). After enlarged the該該S BL segment, steel plate 2a of the inner main beam 2, the main girder 1, 1 side via a washer 15 by inserting the bolts 14 and 14 to the side 2a The inner main beams 2, 2 are fixed to the main beams 1, 1 by fastening with the nuts 16, 16, 16, 16.
【００２２】次に図１３（ａ），（ｂ）により他の伸張
機構を説明する。前記図８（ａ），（ｂ）に示す伸張機
構と同様に、該主桁１の該側部材１ｂに該軸固定具３０
を溶着する。一方、該主桁１のチャンネル鋼材の刃先側
に沿って鉛直に該主桁１の該下部材１ｃとなるフランジ
から該上部材１ａのフランジを通過して上方へ向けて所
定長さの該袴板２６を設けると共に、該袴板２６の上部
と該伸張ジャッキ２０とを該ピン２１で軸着する。更
に、該袴板２６の内側には該主桁１の該上部材１ａの下
面に沿うように、該上部材１ａとクリアランスを取って
所定長さの上支圧板２７ａを固着する。又、該主桁１の
該下部材１ｃの上面に沿うように該下部材１ｃとクリア
ランスを取って所定長さの下支圧板２７ｂを固着する。
該上支圧板２７ａと該下支圧板２７ｂとの間には所定間
隔で該補強板３１，３１を設け該袴板２６とで固着す
る。更に、前記伸張機構と同様に該袴板２６に該ボルト
孔２８を開穿し、該袴板２６から該仮留めボルト２９を
挿入し、該ナット３０に螺合して該伸張機構を該主桁１
に仮固定する。該伸張ジャッキ２０が伸張すると、該袴
板２６は該仮留めボルト２９を中心に回転し、該上部材
１ａと該上支圧板２７ａとのクリアランス及び該下部材
１ｃと該下支圧板２７ｂとのクリアランスがなくなり、
該上部材１ａと該上支圧板２７ａの右端と該下部材１ｃ
と該下支圧板２７ｂの左端とが当接して該主桁１と該伸
張機構が固定され、該伸張ジャッキ２０の伸張力が該主
桁１に伝達される。Next, another extension mechanism will be described with reference to FIGS. 13 (a) and 13 (b). 8A and 8B, the shaft fixing member 30 is attached to the side member 1b of the main girder 1.
Is welded. On the other hand, along the cutting edge side of the channel steel material of the main girder 1, the hakama of a predetermined length extends vertically from the flange serving as the lower member 1 c of the main girder 1 through the flange of the upper member 1 a. A plate 26 is provided, and an upper portion of the skirt plate 26 and the extension jack 20 are pivotally mounted on the pin 21. Further, an upper supporting plate 27a of a predetermined length is fixed to the inside of the skirt plate 26 with a clearance from the upper member 1a along the lower surface of the upper member 1a of the main girder 1. Further, a lower supporting plate 27b of a predetermined length is fixed to the main girder 1 with a clearance along the upper surface of the lower member 1c along the upper surface of the lower member 1c.
The reinforcing plates 31, 31 are provided at predetermined intervals between the upper supporting plate 27a and the lower supporting plate 27b, and are fixed to the skirt plate 26. Further, similarly to the extension mechanism, the bolt holes 28 are formed in the skirt plate 26, the temporary fixing bolts 29 are inserted from the skirt plate 26, and screwed to the nut 30, the extension mechanism is moved to the main body. Digit 1
Temporarily. When the extension jack 20 is extended, the skirt plate 26 rotates about the temporary fixing bolt 29, and the clearance between the upper member 1a and the upper support plate 27a and the clearance between the lower member 1c and the lower support plate 27b are increased. Clearance is gone,
The right end of the upper member 1a, the upper support plate 27a and the lower member 1c
The main girder 1 and the extension mechanism are fixed by abutment with the left end of the lower support plate 27b, and the extension force of the extension jack 20 is transmitted to the main girder 1.
【００２３】次に図１４（ａ），（ｂ）により、更に他
の伸張機構を説明する。前記図１３（ａ），（ｂ）に示
す伸張機構と同様に、該袴板２６、該上支圧板２７ａ及
び該下支圧板２７ｂの構造は同じであるが、該伸張機構
を該主桁１に仮固定する方法が異なる。該主桁１の該上
部材１ａの中央にピン孔２８ａを開穿し、該ピン孔２８
ａと一致する位置の該上支圧板２７ａにも同じくピン孔
２８ｂを開穿する。該上部材１ａの上部から該上支圧板
２７ａに向けて垂直にピン２９ａを差し込んで該伸張機
構を該主桁１に仮固定する。尚、該ピン２９ａの長さは
脱落しない長さとし、該ピン孔２８ａ，２８ｂは該伸張
機構を該ピン２９ａを中心に回転させるためクリアラン
スを十分取るようにする。該伸張ジャッキ２０が伸張す
ると該袴板２６は該ピン２９ａを中心に回転し、該上部
材１ａと該上支圧板２７ａとのクリアランス及び該下部
材１ｃと該下支圧板２７ｂとのクリアランスがなくな
り、該上部材１ａと該上支圧板２７ａの右端と該下部材
１ｃと該下支圧板２７ｂの左端とが当接して該主桁１と
該伸張機構が固定され、該伸張ジャッキ２０の伸張力が
該主桁１に伝達される。Next, a further extension mechanism will be described with reference to FIGS. Similar to the extension mechanism shown in FIGS. 13A and 13B, the structure of the skirt plate 26, the upper support plate 27a, and the lower support plate 27b is the same, but the extension mechanism is connected to the main girder 1. The method of temporarily fixing to is different. A pin hole 28a is formed in the center of the upper member 1a of the main girder 1, and the pin hole 28a is formed.
A pin hole 28b is also formed in the upper support plate 27a at the position corresponding to the position a. The extension mechanism is temporarily fixed to the main girder 1 by inserting a pin 29a vertically from the upper portion of the upper member 1a toward the upper support plate 27a. The length of the pin 29a is set so as not to fall off, and the pin holes 28a and 28b have sufficient clearance to rotate the extension mechanism around the pin 29a. When the extension jack 20 is extended, the skirt plate 26 rotates about the pin 29a, and the clearance between the upper member 1a and the upper support plate 27a and the clearance between the lower member 1c and the lower support plate 27b are lost. The right end of the upper member 1a and the upper support plate 27a abuts the left end of the lower member 1c and the lower support plate 27b to fix the main girder 1 and the extension mechanism, and the tension of the extension jack 20. Is transmitted to the main girder 1.
【００２４】図１５（ａ）は該セグメントリングＳR を
配設したトンネルの縦断側面図を示す。該セグメントリ
ングＳR は前部にカッタディスク４０を設けた掘削機４
１で地山を掘削すると共に、該掘削機４１内のエレクタ
ー（図示せず）で組み立てられ、該掘削機４１内に配設
されているグリッパー４２，４２で地山に反力を取って
再び該掘削機４１を掘進させるときに、該掘削機４１の
後方へ押し出される。その際、前述したように該ＳBLセ
グメントと該ＳA セグメントとの間及び該ＳBRセグメン
トと該ＳA セグメントとの間に伸張ジャッキ２０，２０
を用いて拡径し、図１５（ｂ）に示すように、該セグメ
ントリングＳR を地山に密着させる。このようにすれ
ば、地山の作用荷重を該セグメントリングＳR で直接支
えることができる。FIG.. 15 (a) shows a longitudinal side view of a tunnel which is disposed the segment ring S R. Excavator 4 is the segment ring S R having a cutter disk 40 to the front
At the same time, the ground is excavated at 1 and assembled by an erector (not shown) in the excavator 41, and the grippers 42, 42 disposed in the excavator 41 take a reaction force against the ground to re-examine the ground. When the excavator 41 is excavated, the excavator 41 is pushed backward. At that time, stretching between the between the S BL segment and the S A segment as described above and the S BR segment and the S A segment jacks 20, 20
And expanded using, as shown in FIG. 15 (b), is brought into close contact with the segment ring S R to the natural ground. In this way, it is possible to support directly the applied load of the natural ground in the segment ring S R.
【００２５】尚、本発明は、本発明の精神を逸脱しない
限り種々の改変を為すことができ、そして、本発明が該
改変されたものに及ぶことは当然である。The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.
【００２６】[0026]
【発明の効果】以上説明したように請求項１記載の発明
は、一方のセグメントの主桁の内側から内主桁を突出さ
せ、他方のセグメントの主桁の内側に該内主桁をスライ
ド可能に形成するので構造がシンプルであり、製作コス
トも縮減できる。更に、拡径作業もスムーズに行うこと
ができ、且つ、地山への密着も確実に行うことができ、
地山からの荷重を直接支保することができると共に、テ
ールボイドへの充填材の裏込め注入を省略することがで
きる。As described above, according to the first aspect of the present invention, the inner main girder is projected from the inside of the main girder of one segment, and the inner main girder is slidable inside the main girder of the other segment. Therefore, the structure is simple and the manufacturing cost can be reduced. Furthermore, the work of expanding the diameter can be performed smoothly, and the close contact with the ground can be reliably performed.
The load from the ground can be directly supported, and the backfill injection of the filler into the tail void can be omitted.
【００２７】又、一方のセグメントの主桁の先端に仮継
手板を設け、対峙する他方のセグメントの先端にも仮継
手板を設けるので、セグメントリング組立時に一方のセ
グメントの上に他方のセグメントを載置する段階とトン
ネル軸方向へスライドする段階とに組立て作業が段階分
けでき、作業が容易且つ安全に行うことができる。Further, since a temporary joint plate is provided at the tip of the main girder of one segment and a temporary joint plate is also provided at the tip of the other segment facing the other segment, the other segment is placed on one segment at the time of assembling the segment ring. The assembling operation can be divided into a mounting stage and a sliding stage in the tunnel axial direction, and the operation can be performed easily and safely.
【００２８】請求項２記載の発明は、仮継手板の取付角
度を一方のセグメントの中心角の半分の角度と余裕角を
加えた角度とで決定するので、トンネル内側からのセグ
メント組立作業が更に容易に行うことができる。According to the second aspect of the present invention, the mounting angle of the temporary joint plate is determined by an angle that is a half of the central angle of one of the segments and an angle obtained by adding a margin angle. It can be done easily.
【００２９】請求項３記載の発明は、主桁を上方主桁把
持板と下方主桁把持板とで把持する伸張機構にしたので
構造がシンプルであり安価に製作することができ、且つ
主桁への取り付け、取り外しが確実に、しかも容易に行
うことができる。According to the third aspect of the present invention, since the main girder is an extension mechanism for holding the main girder by the upper main girder holding plate and the lower main girder holding plate, the structure is simple and can be manufactured at low cost. Attachment to and detachment from the device can be performed reliably and easily.
【００３０】請求項４記載の発明は、主桁を上支圧板と
下支圧板とに当接することにより固定する伸張機構にし
たので更に構造がシンプルであり、更に主桁への取り付
け、取り外しが容易に行うことができる。According to the fourth aspect of the present invention, the main girder is formed by an extension mechanism for fixing the main girder by contacting the upper and lower support plates, so that the structure is simpler. It can be done easily.
【００３１】請求項５記載の発明は、主桁と上支圧板と
の固定をピンで行うようにしたので、主桁への位置決め
が容易に行うことができ、且つ、前記請求項４記載の発
明より更に主桁への取り付け、取り外しが容易に行うこ
とができる。According to the fifth aspect of the present invention, since the main girder and the upper support plate are fixed by the pins, the positioning to the main girder can be easily performed, and the fourth aspect of the present invention. It can be more easily attached to and detached from the main girder than the invention.
【図１】（ａ）本発明の一実施の形態を示し、ＳK セグ
メントの斜視図。 （ｂ）ＳBLセグメントの斜視図。 （ｃ）ＳA セグメントの斜視図。1 (a) shows one embodiment of the present invention, a perspective view of the S K segments. (B) A perspective view of the SBL segment. (C) A perspective view of the SA segment.
【図２】セグメントリングの組立作業状態を示す斜視
図。FIG. 2 is a perspective view showing an assembly operation state of the segment ring.
【図３】セグメントリングの組立完了状態を示す斜視
図。FIG. 3 is a perspective view showing a completed state of a segment ring.
【図４】（ａ）セグメントリングの平面図。 （ｂ）図４（ａ）のイ−イ断面図。FIG. 4A is a plan view of a segment ring. FIG. 4B is a sectional view taken along the line II-II of FIG.
【図５】拡径部の振れ防止材の設置状態を示す斜視図。FIG. 5 is a perspective view showing an installation state of a shake preventing member of an enlarged diameter portion.
【図６】図５のロ−断面図。FIG. 6 is a cross-sectional view of FIG.
【図７】伸張ジャッキの設置状態を示す側面図。FIG. 7 is a side view showing the installation state of the extension jack.
【図８】（ａ）伸張ジャッキの取付部を示す側面図。 （ｂ）図８（ａ）のニ−矢視図。FIG. 8A is a side view showing a mounting portion of the extension jack. FIG. 8B is a view as seen from the direction of the arrow N in FIG.
【図９】（ａ）伸張ジャッキが伸張したときの取付部を
示す側面図。 （ｂ）図９（ａ）のホ−矢視図。FIG. 9A is a side view showing a mounting portion when the extension jack is extended. FIG. 9B is a view taken in the direction of an arrow E in FIG.
【図１０】セグメントリングを拡径したときの斜視図。FIG. 10 is a perspective view when the diameter of a segment ring is enlarged.
【図１１】拡径部をボルトで結合したときの斜視図。FIG. 11 is a perspective view when the enlarged diameter portion is joined by bolts.
【図１２】図１１のハ−断面図。FIG. 12 is a sectional view taken along the line C in FIG. 11;
【図１３】（ａ）他の伸張機構を示す側面図。 （ｂ）図１３（ａ）のヘ−矢視図。FIG. 13A is a side view showing another extension mechanism. FIG. 13B is a view as viewed from the direction indicated by the arrow in FIG.
【図１４】（ａ）更に他の伸張機構を示す側面図。 （ｂ）図１４（ａ）のト−矢視図。FIG. 14A is a side view showing a further extension mechanism. FIG. 14B is a view as viewed in the direction of arrow G in FIG.
【図１５】（ａ）セグメントリングを配設したときのト
ンネル縦断側面図。 （ｂ）図１５（ａ）のチ−断面図。FIG. 15A is a vertical sectional side view of a tunnel when a segment ring is provided. (B) A cross-sectional view of FIG.
【図１６】（ａ）従来例のセグメントリングの平面図。 （ｂ）図１６（ａ）のリ−リ断面図。FIG. 16A is a plan view of a conventional segment ring. FIG. 16B is a sectional view taken along the line in FIG.
１ 主桁 １ａ 上部材 １ｂ 側部材 １ｃ 下部材 ２ 内主桁 ３ 補強材 ９，１０ 仮継手板 ２０ 伸張ジャッキ ２２ 上方主桁把持板 ２３ 支持板 ２５ 台座板 ２５ａ 貫通孔 ２６ 袴板 ２７ 下方主桁把持板 ２７ａ 上支圧板 ２７ｂ 下支圧板 ２８ａ，ｂ ピン孔 ２９ 軸 ２９ａ ピン ３０ 軸固定具 ＳBL 一方のセグメント ＳA 他方のセグメント α 取付角度DESCRIPTION OF SYMBOLS 1 Main girder 1a Upper member 1b Side member 1c Lower member 2 Inner main girder 3 Reinforcement 9,10 Temporary joint plate 20 Extension jack 22 Upper main girder gripping plate 23 Support plate 25 Base plate 25a Through hole 26 Hakama plate 27 Lower main girder Gripping plate 27a Upper support plate 27b Lower support plate 28a, b Pin hole 29 Shaft 29a Pin 30 Shaft fixture S BL One segment S A The other segment α Mounting angle
Claims (5)
状に分割され、且つ、該トンネルの切羽側から坑口側へ
設置されるセグメントであって、該セグメントのリング
方向に所定間隔で主桁を配設し、且つ、該主桁間の所定
箇所に補強材を設けられる拡径セグメントに於て、一方
のセグメントの該主桁の内側から円周方向に所定長さの
内主桁を突出させると共に、他方のセグメントの該主桁
は、該内主桁の外面と円周方向に該主桁の内側をスライ
ド可能に形成し、更に、一方のセグメントの内側であっ
て、該切羽側の該主桁の先端に仮継手板を設けると共
に、該切羽側の該主桁に対峙する他方のセグメントの該
主桁の内側先端にも該仮継手板を設け、該仮継手板同士
を当接するように形成することを特徴とする拡径セグメ
ント。1. A segment which is divided into an arc shape along the inner peripheral surface of a tunnel to be constructed and which is installed from a face side of the tunnel to a wellhead side, and is mainly arranged at predetermined intervals in a ring direction of the segment. A girder is arranged, and in a diameter-enlarging segment in which a reinforcing material is provided at a predetermined position between the main girders, an inner main girder having a predetermined length in a circumferential direction from inside the main girder of one of the segments. At the same time, the main girder of the other segment is formed so as to be slidable inside the main girder with the outer surface of the inner main girder in the circumferential direction. A temporary joint plate is provided at the tip of the main girder, and the temporary joint plate is also provided at the inner tip of the main girder of the other segment facing the main girder on the face side, and the temporary joint plates are brought into contact with each other. An enlarged diameter segment formed so as to be in contact with.
トの該仮継手板の半径方向の取付角度は、該一方のセグ
メントの中心角の半分の角度と余裕角を加えて決定され
る角度とすることを特徴とする請求項１記載の拡径セグ
メント。2. The radial mounting angle of the temporary joint plate between the one segment and the other segment is an angle determined by adding a half angle of a center angle of the one segment and a margin angle. The enlarged diameter segment according to claim 1, wherein:
向に所定長さの内主桁を突出させると共に、他方のセグ
メントの該主桁は、該内主桁の外面と円周方向に該主桁
の内側をスライド可能に形成した一方のセグメントと他
方のセグメントの該主桁間に配設される伸張ジャッキに
よる拡径セグメントの伸張機構であって、予め、該主桁
の側部材の所定箇所の内側に軸固定具を固着し、一方、
該主桁の内側側面に沿って鉛直に該主桁の下部材から上
部材まで袴板を設けると共に、該袴板の上部には該主桁
の該上部材の上面に沿って所定長さの台座板を固着し、
該台座板の中央部には該伸張ジャッキと軸着した上方主
桁把持板を該主桁の該上部材に当接させる貫通孔を開穿
し、且つ、該台座板の上部には該上方主桁把持板を軸着
する支持板を設けると共に、該袴板の上部近傍の内側に
は該主桁の該上部材の下面に沿うように所定長さの下方
主桁把持板を固着し、更に、該袴板と該軸固定具とを軸
で固定し、該伸張ジャッキが伸張したとき、該上方主桁
把持板と該下方主桁把持板とで該主桁の該上部材の上・
下面を把持することを特徴とする拡径セグメントの伸張
機構。3. An inner main girder of a predetermined length is projected in the circumferential direction from the inside of the main girder of one segment, and the main girder of the other segment is circumferentially connected to the outer surface of the inner main girder. An extension mechanism for expanding a diameter-expanding segment by an extension jack disposed between one main segment and another main segment formed so that the inside of the main girder is slidable. Attach the shaft fixture inside the place,
A skirt plate is provided vertically from the lower member to the upper member of the main girder along the inner side surface of the main girder, and a predetermined length is provided along the upper surface of the upper member of the main girder on the upper part of the spar plate. Attach the base plate,
A through hole is formed in the center of the pedestal plate to allow an upper main girder gripping plate axially attached to the extension jack to abut on the upper member of the main girder. A support plate for pivotally attaching the main girder holding plate is provided, and a lower main girder holding plate of a predetermined length is fixed inside the vicinity of the upper part of the skirt plate along the lower surface of the upper member of the main girder, Further, the hakama plate and the shaft fixing device are fixed by a shaft, and when the extension jack is extended, the upper main girder holding plate and the lower main girder holding plate are used to hold the upper member of the main girder.
An extension mechanism for an enlarged diameter segment, which grips a lower surface.
向に所定長さの内主桁を突出させると共に、他方のセグ
メントの該主桁は、該内主桁の外面と円周方向に該主桁
の内側をスライド可能に形成した一方のセグメントと他
方のセグメントの該主桁間に配設される伸張ジャッキに
よる拡径セグメントの伸張機構であって、予め、該主桁
の側部材の所定箇所の内側に軸固定具を固着し、一方、
該主桁の内側側面に沿って鉛直に該主桁の下部材から上
方へ向けて袴板を設けると共に、該袴板と伸張ジャッキ
とを軸着し、且つ、該袴板の内側には、該主桁の上部材
の下面に沿うように所定長さの上支圧板を固着し、更
に、該主桁の該下部材の上面に沿うように所定長さの下
支圧板を固着し、該袴板と該軸固定具とを軸で固定し、
該伸張ジャッキが伸張したとき、該上支圧板と該下支圧
板とを該主桁の該上・下部材にそれぞれ当接することを
特徴とする拡径セグメントの伸張機構。4. An inner main girder of a predetermined length is projected in the circumferential direction from the inside of the main girder of one segment, and the main girder of the other segment is circumferentially connected to the outer surface of the inner main girder. An extension mechanism for expanding a diameter-expanding segment by an extension jack disposed between one main segment and another main segment formed so that the inside of the main girder is slidable. Attach the shaft fixture inside the place,
Along with an inner side surface of the main girder, a hakama plate is provided vertically upward from the lower member of the main girder, and the hakama plate and the extension jack are axially mounted, and inside the hammer plate, An upper support plate of a predetermined length is fixed along the lower surface of the upper member of the main girder, and a lower support plate of a predetermined length is further fixed along the upper surface of the lower member of the main girder, Fix the hakama board and the shaft fixture with a shaft,
An extension mechanism for an expanding segment, wherein when the extension jack is extended, the upper support plate and the lower support plate abut against the upper and lower members of the main girder, respectively.
向に所定長さの内主桁を突出させると共に、他方のセグ
メントの該主桁は、該内主桁の外面と円周方向に該主桁
の内側をスライド可能に形成した一方のセグメントと他
方のセグメントの該主桁間に配設される伸張ジャッキに
よる拡径セグメントの伸張機構であって、予め、該主桁
の上部材の所定箇所にピン孔を開穿し、一方、該主桁の
内側側面に沿って鉛直に該主桁の下部材から上方へ向け
て袴板を設けると共に、該袴板と該伸張ジャッキとを軸
着し、且つ、該袴板の内側には、該主桁の該上部材の下
面に沿うように所定長さの上支圧板を固着し、更に、該
主桁の該下部材の上面に沿うように所定長さの下支圧板
を固着すると共に、該上支圧板には該主桁の該ピン孔と
一致する位置にピン孔を開穿し、該主桁と該袴板とを該
上支圧板に挿入されるピンで固定し、該伸張ジャッキが
伸張したとき、該上支圧板と該下支圧板とを該主桁の該
上・下部材にそれぞれ当接することを特徴とする拡径セ
グメントの伸張機構。5. An inner main girder of a predetermined length is projected in the circumferential direction from the inside of the main girder of one segment, and the main girder of the other segment is circumferentially connected to the outer surface of the inner main girder. An extension mechanism for expanding a diameter-expanding segment by an extension jack disposed between one main girder of one segment and the other segment formed so that the inside of the main girder is slidable. At the same time, a pin hole is formed in a location, and a skirt plate is provided vertically along the inner side surface of the main girder from the lower member of the main girder upward, and the skirt plate and the extension jack are axially mounted. On the inner side of the skirt plate, an upper supporting plate of a predetermined length is fixed along the lower surface of the upper member of the main girder, and further along the upper surface of the lower member of the main girder. A lower supporting plate of a predetermined length is fixed to the upper supporting plate, and a pin is provided at a position corresponding to the pin hole of the main girder. A hole is formed, and the main girder and the skirt plate are fixed with pins inserted into the upper support plate. When the extension jack is extended, the upper support plate and the lower support plate are connected to the main girder. 3. The extension mechanism of the enlarged diameter segment, wherein the extension member contacts the upper and lower members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26113199A JP2001082088A (en) | 1999-09-14 | 1999-09-14 | Expansion segment and extending mechanism for expansion segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26113199A JP2001082088A (en) | 1999-09-14 | 1999-09-14 | Expansion segment and extending mechanism for expansion segment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001082088A true JP2001082088A (en) | 2001-03-27 |
Family
ID=17357534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26113199A Ceased JP2001082088A (en) | 1999-09-14 | 1999-09-14 | Expansion segment and extending mechanism for expansion segment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001082088A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021031943A (en) * | 2019-08-23 | 2021-03-01 | 東急建設株式会社 | Section reduction segment, and section reduction system |
| JP2021031942A (en) * | 2019-08-23 | 2021-03-01 | 東急建設株式会社 | Cross-section enlargement segment, and cross-section enlargement system |
| CN113323669A (en) * | 2021-06-22 | 2021-08-31 | 海环科技集团股份有限公司 | Steel arch frame for circular shaft support and construction method thereof |
-
1999
- 1999-09-14 JP JP26113199A patent/JP2001082088A/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021031943A (en) * | 2019-08-23 | 2021-03-01 | 東急建設株式会社 | Section reduction segment, and section reduction system |
| JP2021031942A (en) * | 2019-08-23 | 2021-03-01 | 東急建設株式会社 | Cross-section enlargement segment, and cross-section enlargement system |
| JP7232154B2 (en) | 2019-08-23 | 2023-03-02 | 東急建設株式会社 | Cross section expansion segment and cross section expansion system |
| CN113323669A (en) * | 2021-06-22 | 2021-08-31 | 海环科技集团股份有限公司 | Steel arch frame for circular shaft support and construction method thereof |
| CN113323669B (en) * | 2021-06-22 | 2023-12-12 | 海环科技集团股份有限公司 | Steel arch for supporting round vertical shaft and construction method thereof |
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