JP2780088B2 - Widening method and widening segment of inner section of shield tunnel - Google Patents
Widening method and widening segment of inner section of shield tunnelInfo
- Publication number
- JP2780088B2 JP2780088B2 JP8076355A JP7635596A JP2780088B2 JP 2780088 B2 JP2780088 B2 JP 2780088B2 JP 8076355 A JP8076355 A JP 8076355A JP 7635596 A JP7635596 A JP 7635596A JP 2780088 B2 JP2780088 B2 JP 2780088B2
- Authority
- JP
- Japan
- Prior art keywords
- segment
- widening
- tunnel
- skin plate
- shield
- 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.)
- Expired - Fee Related
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、シールド洞道の内
空断面の拡幅工法および拡幅用セグメントに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for widening an inner cross section of a shield tunnel and a widening segment.
【０００２】[0002]
【従来の技術】シールド洞道の内空断面の拡幅を行うに
は、従来、セグメントの桁高を低くした、すなわち、全
体に薄いセグメントを使用することで内空断面を確保し
ている。周知なようにセグメント相互のトンネル進行方
向およびトンネル周方向の接合は接合面を合わせたボル
ト接合である。2. Description of the Related Art Conventionally, in order to widen the inner cross section of a shield tunnel, the girder height of a segment is reduced, that is, the inner cross section is secured by using a thin segment as a whole. As is well known, the joining between the segments in the tunnel traveling direction and the tunnel circumferential direction is a bolt joining with joining surfaces.
【０００３】[0003]
【発明が解決しようとする課題】このような従来のセグ
メントでは、断面方向の二次元の構造体を集合したもの
で、スキンプレートとリブで形成する鋼製セグメントを
例にとるとリブが継手となるので、前記内空断面の確保
にも限界があった。In such a conventional segment, a two-dimensional structure in a cross-sectional direction is assembled. When a steel segment formed by a skin plate and a rib is taken as an example, the rib is connected to a joint. Therefore, there is a limit in securing the inner space section.
【０００４】本発明の目的は前記従来例の不都合を解消
し、セグメント外径と同等の内空断面を確保でき、構造
体が連続しているので、断面性能が高く、また、止水性
に優れるシールド洞道の内空断面の拡幅工法および拡幅
用セグメントを提供することにある。An object of the present invention is to eliminate the disadvantages of the prior art, to secure an inner cross section equal to the outer diameter of the segment, and to have a continuous structure, so that the cross sectional performance is high and the water stopping property is excellent. An object of the present invention is to provide a widening method and a widening segment of a hollow section of a shield tunnel.
【０００５】[0005]
【課題を解決するための手段】本発明は前記目的を達成
するため、シールド洞道の内空断面の拡幅工法として
は、拡幅する範囲では、スキンプレートに縦リブ、横リ
ブを設けた金属製セグメントのトンネル進行およびセグ
メント間の継手はスキンプレート端部同士を溶接接合し
て行い、ジャッキの推力を受けない位置で端部のセグメ
ント以外は前記縦リブ、横リブを切断してスキンプレー
トのみを残すこと、さらに、金属製セグメントは、トン
ネル進行方向においては、縦リブに対して、一端を突出
させ、または切欠いてスキンプレートを張設した拡幅端
部用セグメントと、一端を突出させ、他端をこの突出分
だけ切欠いてスキンプレートを張設したことを要旨とす
るものである。According to the present invention, in order to achieve the above-mentioned object, as a method of widening the inner cross section of a shield tunnel, a metal plate having a vertical rib and a horizontal rib provided on a skin plate is provided within a widening range. Tunnel progression of segments and joints between segments are performed by welding the skin plate ends to each other, cutting the vertical ribs and horizontal ribs except for the end segments at a position where the thrust of the jack is not received, and only the skin plate In the tunnel traveling direction, the metal segment has one end protruding with respect to the longitudinal rib, or a widened end segment having a cut-out skin plate stretched, and one end protruding. The gist of the present invention is that the skin plate is stretched by cutting out the protrusions.
【０００６】また、シールド洞道の内空断面の拡幅用セ
グメントとしては、金属製セグメントであり、トンネル
進行方向においては、縦リブに対して、一端を突出さ
せ、または切欠き、トンネル周方向においては一端を突
出させ、他端をこの突出分だけ切欠いてスキンプレート
を張設したた拡幅端部用セグメントと、トンネル進行方
向およびトンネル周方向の双方において、一端を突出さ
せ、他端をこの突出分だけ切欠いてスキンプレートを張
設した拡幅接続用セグメントとからなること、および、
スキンプレートの突出する一端には溶接の際に使用する
スチールプレートを装着し、切欠いた端部は開先加工と
することを要旨とするものである。The widening segment of the inner cross section of the shield tunnel is a metal segment. One end is protruded or cut away from the longitudinal rib in the traveling direction of the tunnel, and is notched in the circumferential direction of the tunnel. Has one end protruding, the other end is notched by the amount of this protruding portion and a skin plate is stretched, and one end protrudes in both the traveling direction of the tunnel and the circumferential direction of the tunnel. A widened connection segment in which a skin plate is stretched by notching, and
The gist of the invention is that a steel plate used for welding is attached to one end of the skin plate that protrudes, and the notched end is to be grooved.
【０００７】請求項１記載の本発明によれば、拡幅する
範囲ではトンネル進行およびセグメント間の継手はスキ
ンプレート端部同士を溶接接合して行い、端部のセグメ
ント以外は前記縦リブ、横リブを切断してスキンプレー
トのみを残すようにしたので、端部は縦リブ、横リブが
ある剛体セグメントがあり、この剛体セグメントにスキ
ンプレートが連続して伸びる３次元の構造体となる。According to the first aspect of the present invention, in the widening range, the tunnel advancing and the joint between the segments are performed by welding and joining the ends of the skin plate, and the longitudinal ribs and the horizontal ribs except for the end segments. Is cut so that only the skin plate is left, so that the end has a rigid segment having vertical ribs and horizontal ribs, and the rigid segment has a three-dimensional structure in which the skin plate extends continuously.
【０００８】請求項２、請求項３記載の本発明によれ
ば、スキンプレート端部同士を溶接接合を容易にする構
造のセグメントを提供するものであり、スキンプレート
の突出する一端が、隣接するセグメントの切欠いたスキ
ンプレート端に衝合するように該隣接するセグメントに
被さり、この位置で相互を溶接するようにすれば、縦リ
ブ、横リブを外した位置で溶接され、溶接作業を行い易
いとともに構造的にも安定したものとなる。According to the second and third aspects of the present invention, there is provided a segment having a structure for facilitating welding and joining the ends of the skin plate, and the projecting ends of the skin plate are adjacent to each other. If the adjacent segments are covered so as to abut against the cut-out skin plate ends of the segments and they are welded to each other at this position, they are welded at positions where the vertical ribs and the horizontal ribs are removed, making it easier to perform welding work. In addition, the structure is stable.
【０００９】請求項４記載の本発明によれば、スキンプ
レートはスチールプレートを装着した端と開先加工した
端とが衝合して確実かつ簡単に溶接できる。According to the fourth aspect of the present invention, the skin plate can be reliably and easily welded by abutting the end on which the steel plate is mounted and the beveled end.
【００１０】[0010]
【発明の実施の形態】以下、図面について本発明の実施
の形態を説明する。図１〜図８は本発明のシールド洞道
の内空断面の拡幅工法の１実施形態を示す各工程の縦断
側面図で、図中１はシールドマシン、２はテールプレー
ト、３は推進ジャッキである。Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 are longitudinal sectional side views of each step showing one embodiment of a method of widening the inner space section of a shield tunnel according to the present invention, wherein 1 is a shield machine, 2 is a tail plate, and 3 is a propulsion jack. is there.
【００１１】４は一般部セグメントで、図２に示すよう
に拡幅する範囲では、一般部セグメント４の最前列のも
のに拡幅端部用セグメント５ａを接続し、さらにこの拡
幅端部用セグメント５ａに拡幅接続用セグメント６を複
数リング分接続し、その前端に拡幅端部用セグメント５
ｂを接続してその先の一般部セグメント４につなぐ。In the range of widening as shown in FIG. 2, a wide end segment 5a is connected to the front row of the general portion segment 4, and the wide end segment 5a is further connected to the wide end segment 5a. The widening connection segments 6 are connected by a plurality of rings, and the widening end segments 5
b is connected to the general segment 4 ahead.
【００１２】そして、拡幅する範囲に使用するこれら金
属製セグメントである拡幅端部用セグメント５ａ，５ｂ
と拡幅接続用セグメント６のトンネル進行およびセグメ
ント間の継手はシールドマシン１のテールプレート２内
でスキンプレート７の端部同士を溶接接合して行い（図
３〜７）、ジャッキの推力を受けない位置、すなわち、
テールプレート２から外へ出たところで図８に示すよう
に拡幅端部用セグメント５ｂは縦リブ８ａ、横リブ８ｂ
を切断してスキンプレート７のみを残す。The wide end portion segments 5a and 5b, which are the metal segments used in the widening range.
The joint between the segment and the widening connection segment 6 is advanced by welding the ends of the skin plate 7 to each other in the tail plate 2 of the shield machine 1 (FIGS. 3 to 7) and does not receive the thrust of the jack. Location, ie
As shown in FIG. 8, when it comes out of the tail plate 2, the wide end segment 5b is formed by a vertical rib 8a and a horizontal rib 8b.
And leave only the skin plate 7.
【００１３】次に、拡幅端部用セグメント５ａ，５ｂお
よび拡幅接続用セグメント６の一例を詳細に説明する。Next, an example of the wide end segments 5a and 5b and the wide connection segment 6 will be described in detail.
【００１４】先に拡幅接続用セグメント６を図９、図10
に示すと、トンネル周方向に伸びる縦リブ８ａと、トン
ネル進行方向に伸びる横リブ８ｂとスキンプレート７と
からなる金属製セグメントであることは前記の通りであ
るが、張設するスキンプレート７はトンネル進行方向お
よびトンネル周方向の双方において、縦リブ８ａ、横リ
ブ８ｂの位置よりも前方に一方の端部７ａを突出させ、
この端部７ａには溶接の際に使用するスチールプレート
９を装着しておく。First, the widening connection segment 6 is shown in FIGS.
As described above, it is the metal segment composed of the vertical rib 8a extending in the tunnel circumferential direction, the horizontal rib 8b extending in the tunnel traveling direction, and the skin plate 7, as described above. In both the traveling direction of the tunnel and the circumferential direction of the tunnel, one end 7a is projected forward from the positions of the vertical ribs 8a and the horizontal ribs 8b,
A steel plate 9 used for welding is attached to the end 7a.
【００１５】これに対してスキンプレート７の他の端部
７ｂは前記端部７ａの突出長さ分だけ縦リブ８ａの位置
よりも引っ込めるように切欠いた。この端部７ｂには開
先加工10を施した。On the other hand, the other end 7b of the skin plate 7 is notched so as to be retracted from the position of the vertical rib 8a by the protruding length of the end 7a. A groove 10 was formed on the end 7b.
【００１６】拡幅端部用セグメント５ａは、スキンプレ
ート７をトンネル進行方向においては、縦リブ８ａ、横
リブ８ｂの位置よりも前方に一方の端部７ａを突出させ
たものであるが、他方の端は縦リブ８ａ、横リブ８ｂと
結合するものである。セグメント間においては図10に示
す拡幅接続用セグメント６と同じように横リブ８ｂの位
置よりも前方に一方の端部７ａを突出させ、他の端部７
ｂは前記端部７ａの突出長さ分だけ横リブ８ａの位置よ
りも引っ込めるように切欠いた。The widened end segment 5a is formed by projecting one end 7a of the skin plate 7 forward of the longitudinal ribs 8a and the horizontal ribs 8b in the tunnel advancing direction. The ends are connected to the vertical ribs 8a and the horizontal ribs 8b. Between the segments, one end 7a is projected forward of the position of the lateral rib 8b, similarly to the wide connection segment 6 shown in FIG.
b is notched so as to be retracted from the position of the lateral rib 8a by the protruding length of the end 7a.
【００１７】拡幅端部用セグメント５ｂは、スキンプレ
ート７をトンネル進行方向においては縦リブ８ａの位置
よりも引っ込めるように切欠いた端部７ｂとする。これ
もセグメント間においては端部７ａを突出させ、他の端
部７ｂを引っ込める。The widened end segment 5b is a notched end 7b so that the skin plate 7 is retracted from the position of the vertical rib 8a in the tunnel traveling direction. This also protrudes the end 7a between the segments and retracts the other end 7b.
【００１８】このようにして、拡幅端部用セグメント５
ａはトンネル進行方向においては一般部セグメント４に
縦リブ８ａのボルト接合をもって接合し、トンネル周方
向においては図10に示すようにスキンプレート７の突出
する一端７ａが、隣接するセグメントの切欠いたスキン
プレート端７ｂに衝合するように該隣接するセグメント
に被さり、この位置でスキンプレート７の相互を溶接す
る。Thus, the wide end segment 5
a is joined to the general segment 4 by bolt connection of the vertical ribs 8a in the tunnel traveling direction, and in the circumferential direction of the tunnel, one end 7a of the skin plate 7 protrudes as shown in FIG. The adjacent segments are laid over butting against the plate edge 7b and the skin plates 7 are welded together at this location.
【００１９】この拡幅端部用セグメント５ａに対して拡
幅接続用セグメント６を複数リング分取り付け、さらに
その前端に拡幅端部用セグメント５ｂを取付け、拡幅端
部用セグメント５ｂを縦リブ８ａをもって一般部セグメ
ント４を接合する。A plurality of widening connection segments 6 are attached to the widening end segment 5a for a plurality of rings, and a widening end segment 5b is attached to the front end thereof. Segment 4 is joined.
【００２０】拡幅する範囲では端部は拡幅端部用セグメ
ント５ａ，５ｂの剛体セグメントがあり、この剛体セグ
メントに拡幅接続用セグメント６のスキンプレート７の
みが連続して残り、３次元の構造体となる。In the widening range, the ends have rigid segments of the widening end segments 5a and 5b, and only the skin plate 7 of the widening connection segment 6 remains continuously in the rigid segment. Become.
【００２１】[0021]
【発明の効果】以上述べたように本発明のシールド洞道
の内空断面の拡幅工法および拡幅用セグメントは、セグ
メント外径と同等の内空断面を確保でき、構造体が連続
しているので、断面性能が高く、また、止水性に優れる
ものである。As described above, the widening method and the widening segment of the inner hollow section of the shield tunnel according to the present invention can secure the inner hollow section equal to the outer diameter of the segment, and the structure is continuous. It has high cross-sectional performance and excellent water stopping properties.
【図１】本発明のシールド洞道の内空断面の拡幅工法の
１実施形態を示す第１工程の縦断側面図である。FIG. 1 is a longitudinal sectional side view of a first step showing an embodiment of a method for widening an inner space section of a shield tunnel according to the present invention.
【図２】本発明のシールド洞道の内空断面の拡幅工法の
１実施形態を示す第２工程の縦断側面図である。FIG. 2 is a vertical sectional side view of a second step showing one embodiment of the widening method of the inner hollow section of the shield cave according to the present invention.
【図３】本発明のシールド洞道の内空断面の拡幅工法の
１実施形態を示す第３工程の縦断側面図である。FIG. 3 is a vertical sectional side view of a third step showing one embodiment of the widening method of the inner hollow section of the shield cave according to the present invention.
【図４】本発明のシールド洞道の内空断面の拡幅工法の
１実施形態を示す第４工程の縦断側面図である。FIG. 4 is a vertical sectional side view of a fourth step showing one embodiment of the widening method of the inner hollow section of the shield tunnel according to the present invention.
【図５】本発明のシールド洞道の内空断面の拡幅工法の
１実施形態を示す第５工程の縦断側面図である。FIG. 5 is a vertical sectional side view of a fifth step showing one embodiment of the widening method of the inner hollow section of the shield cave according to the present invention.
【図６】本発明のシールド洞道の内空断面の拡幅工法の
１実施形態を示す第６工程の縦断側面図である。FIG. 6 is a longitudinal sectional side view of a sixth step showing one embodiment of the widening method of the inner hollow section of the shield tunnel according to the present invention.
【図７】本発明のシールド洞道の内空断面の拡幅工法の
１実施形態を示す第７工程の縦断側面図である。FIG. 7 is a vertical sectional side view of a seventh step showing one embodiment of the widening method of the inner hollow section of the shield cave according to the present invention.
【図８】本発明のシールド洞道の内空断面の拡幅工法の
１実施形態を示す第８工程の縦断側面図である。FIG. 8 is a vertical sectional side view of an eighth step showing one embodiment of the widening method for the inner hollow section of the shield cave according to the present invention.
【図９】拡幅接続用セグメントの一例を示す縦断側面図
である。FIG. 9 is a longitudinal sectional side view showing an example of a widening connection segment.
【図１０】拡幅接続用セグメント、拡幅端部用セグメン
トのトンネル周方向継ぎ手の縦断正面図である。FIG. 10 is a longitudinal sectional front view of a tunnel circumferential joint of a widening connection segment and a widening end segment.
１…シールドマシン ２…テールプレート ３…推進ジャッキ ４…一般部セグメン
ト ５ａ，５ｂ…拡幅端部用セグメント ６…拡幅接続用セグメント ７…スキンプレート ７ａ，７ｂ…端部 ８ａ…縦リブ ８ｂ…横リブ ９…スチールプレー
ト 10…開先加工DESCRIPTION OF SYMBOLS 1 ... Shield machine 2 ... Tail plate 3 ... Propulsion jack 4 ... General part segment 5a, 5b ... Segment for wide end part 6 ... Segment for wide connection 7 ... Skin plate 7a, 7b ... End part 8a ... Vertical rib 8b ... Horizontal rib 9 ... Steel plate 10 ... Bevel processing
Claims (4)
リブ、横リブを設けた金属製セグメントのトンネル進行
方向およびトンネル周方向の継手はスキンプレート端部
同士を溶接接合して行い、ジャッキの推力を受けない位
置で端部のセグメント以外は前記縦リブ、横リブを切断
してスキンプレートのみを残すことを特徴としたシール
ド洞道の内空断面の拡幅工法。In the widening range, joints in the tunnel traveling direction and the tunnel circumferential direction of a metal segment provided with vertical ribs and horizontal ribs on the skin plate are formed by welding and joining the ends of the skin plate, and the thrust of the jack is obtained. A method of widening the inner cross section of a shield tunnel, wherein the vertical ribs and the horizontal ribs are cut except for the end segment at a position not to receive the skin plate, leaving only the skin plate.
においては、縦リブに対して、一端を突出させ、または
切欠いてスキンプレートを張設した拡幅端部用セグメン
トと、一端を突出させ、他端をこの突出分だけ切欠いて
スキンプレートを張設した拡幅接続用セグメントである
請求項１記載のシールド洞道の内空断面の拡幅工法。2. A metal segment is formed such that one end protrudes or a cut-out skin plate is stretched at one end with respect to a longitudinal rib in a tunnel traveling direction, and one end protrudes from the longitudinal rib. the widening method of the hollow section of claim 1 Symbol mounting shield sinus tract is a segment for widening connections stretched the skin plate lacks only switching the projection amount.
方向においては、縦リブに対して、一端を突出させ、ま
たは切欠き、トンネル周方向においては一端を突出さ
せ、他端をこの突出分だけ切欠いてスキンプレートを張
設した拡幅端部用セグメントと、トンネル進行方向およ
びトンネル周方向の双方において、一端を突出させ、他
端をこの突出分だけ切欠いてスキンプレートを張設した
拡幅接続用セグメントとからなるシールド洞道の内空断
面の拡幅用セグメント。3. A metal segment having one end protruding or notched with respect to a longitudinal rib in a tunnel advancing direction, one end protruding in a tunnel circumferential direction, and the other end being notched by this protruding portion. And a wide end segment in which a skin plate is stretched, and in both the tunnel traveling direction and the tunnel circumferential direction, one end is protruded, and the other end is cut out by the amount of the protrusion, and a wide connection segment in which the skin plate is stretched. A widening segment of the inner section of the shield tunnel consisting of
の際に使用するスチールプレートを装着し、切欠いた端
部は開先加工とする請求項３記載のシールド洞道の内空
断面の拡幅用セグメント。4. A widening of an inner cross section of a shield tunnel according to claim 3, wherein a steel plate used for welding is mounted on one end of the skin plate protruding, and a notched end is grooved. segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8076355A JP2780088B2 (en) | 1996-03-29 | 1996-03-29 | Widening method and widening segment of inner section of shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8076355A JP2780088B2 (en) | 1996-03-29 | 1996-03-29 | Widening method and widening segment of inner section of shield tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09268895A JPH09268895A (en) | 1997-10-14 |
| JP2780088B2 true JP2780088B2 (en) | 1998-07-23 |
Family
ID=13603064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8076355A Expired - Fee Related JP2780088B2 (en) | 1996-03-29 | 1996-03-29 | Widening method and widening segment of inner section of shield tunnel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2780088B2 (en) |
-
1996
- 1996-03-29 JP JP8076355A patent/JP2780088B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09268895A (en) | 1997-10-14 |
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