JPH01312196A - Construction of flat tunnel - Google Patents
Construction of flat tunnelInfo
- Publication number
- JPH01312196A JPH01312196A JP63143583A JP14358388A JPH01312196A JP H01312196 A JPH01312196 A JP H01312196A JP 63143583 A JP63143583 A JP 63143583A JP 14358388 A JP14358388 A JP 14358388A JP H01312196 A JPH01312196 A JP H01312196A
- Authority
- JP
- Japan
- Prior art keywords
- segment
- ring
- prestress
- struts
- temporary
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims description 3
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業」二の利用分野〉
本発明は偏平断面形状のシールｌ’ トンネルの施工方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industry> Second Field of Application The present invention relates to a method for constructing a seal l' tunnel having a flat cross-sectional shape.
〈従来の技術〉
従来から、偏平断面形状のシールドトンネル内でセグメ
ンＩ・を組み立て、リングを形成した後にプレストレス
を導入し、セグメントのリング強度を青ろタイプの偏平
トンネノＬの施工方法が存在する。<Conventional technology> Conventionally, there has been a method of constructing a blue type flat tunnel tunnel L by assembling segment I in a shield tunnel with a flat cross-section, and introducing prestress after forming a ring to increase the ring strength of the segment. do.
〈本発明が解決しようとする問題点〉
通′！：Ａの円形断面形状のトンネルと比較Ｊると、偏
平断面形状のトンネルは、周囲の地山圧力の影響を受（
Ｊてリング形状か変形しやすいという欠点を有する。<Problems to be solved by the present invention> General! : Comparing with the tunnel with a circular cross section in A, the tunnel with a flat cross section is affected by the surrounding rock pressure (
The disadvantage is that the ring shape is easily deformed.
−に記の従来技術の場合、プレストレスを導入するまて
のセグメントのリング強度は、ボルト接合等によるため
相、千部の強度か低い。In the case of the prior art described in (1), the ring strength of the segment before introducing prestress is as low as 1,000 parts because it is bolted together or the like.
この状態で地山圧力か作用ずれば、セグメントは所定の
リング形状を保持てきない。If the ground pressure acts in this state, the segment will not maintain its predetermined ring shape.
従って、地山圧力の作用しないシールＩ・テール内でプ
レストレスを導入し、セグメントのリング強度が発現し
、地山圧力に抵抗できる状態になった後でなければシー
ルド機は前進できない。Therefore, the shield machine cannot move forward unless a prestress is introduced in the seal I-tail where the earth pressure does not act, and the ring strength of the segment is developed so that it can resist the earth pressure.
その結果、セグメントのプレストレス導入が、シールド
の掘進能率を低下させる原因となっている。As a result, the introduction of prestress in the segments causes a reduction in the shield excavation efficiency.
〈本発明の目的〉
本発明は上記のような問題点を解決するためになされた
もので、シールドの掘進作業と、セグメントのプレスト
レス導入作業を独立して行い、セグメントのプレストレ
ス導入作業に影響されることなく、シールドの掘進能率
を向上さぜることがてきる偏平トンネルの施工方法を提
供することを目的とする。<Object of the present invention> The present invention was made to solve the above-mentioned problems, and it is possible to perform the shield excavation work and the segment prestress introduction work independently, and to perform the segment prestress introduction work separately. The purpose of the present invention is to provide a method for constructing a flat tunnel that can improve shield excavation efficiency without being affected.
〈本発明の構成〉
以下、図面を参照しながら本発明の一実施例について説
明する。<Configuration of the Present Invention> An embodiment of the present invention will be described below with reference to the drawings.
なお、本実施例においては第１図に示すように、リング
内に鉛直方向に、３木の仮支柱２をほぼ等間隔で設置し
た場合について説明する。In this embodiment, as shown in FIG. 1, a case will be described in which three temporary supports 2 are installed in a ring at approximately equal intervals in the vertical direction.
〈イ〉セグメンＩ・の組み立て
先ず従来の方法と同様に、シールド機で偏平断面形状の
トンネルの掘進を行いながら、シールドテール部内にセ
グメン）・１のリングを組み立てる。<A> Assembly of segment I. First, as in the conventional method, while excavating a tunnel with a flat cross section using a shield machine, assemble the ring of segment I.1 in the shield tail portion.
このとき、後述の仮支柱２を設置するセグメント１の内
面には、チーバージ：、、 −１１が予め突設されてい
る。At this time, Qi barges .
このテーパーシコ−１１は、Ｉ・ンネル軸と平行に設け
られた突起体であり、デーバーシュー１１の突出方向の
長さをトンネルの切羽側に向がって次第に増加させ、テ
ーパー臥に形成したものである、。This taper shoe 11 is a protrusion provided parallel to the tunnel axis, and the length of the Dever shoe 11 in the protruding direction is gradually increased toward the tunnel face side, and is formed into a tapered shape. It is something.
また、テーパーシュー１１のテーパー面は、テフ「Ｊン
等の低摩擦材によって加工し、仮支柱２が摺動じやすく
形成しである。The tapered surface of the tapered shoe 11 is made of a low-friction material such as Teflon, so that the temporary support 2 can easily slide thereon.
〈口〉仮支柱の設？Ｆｆ
セグメント１のリングを組み立てた後、プレストレスを
導入する前に、仮支柱２をリング内に設置する。<Mouth> Installation of temporary support? After assembling the ring of Ff segment 1 and before introducing prestressing, temporary struts 2 are installed in the ring.
仮支柱２の設置数は、リングに作用する周囲の地山圧力
に十分抵抗できるように、計算によって求められた必要
数を設置する。The required number of temporary supports 2 is determined by calculation so that the ring can sufficiently resist the surrounding ground pressure acting on the ring.
この仮支柱２は、第２図に示すように、板状体等の上下
両端面に、前述のチーパージ、−１１と同しテーパー角
を有する溝２１を刻設した構造である。As shown in FIG. 2, this temporary strut 2 has a structure in which grooves 21 having the same taper angle as the above-mentioned Cheapage -11 are carved on both the upper and lower end surfaces of a plate-shaped body or the like.
そして、仮支柱２を設置する上下両端部近傍のセグメン
ト１に設けたテーパーシュー］１に、仮支柱２の溝を嵌
合し、第２図に示す、ように切羽側に摺動させて所定の
位置て係Ｉにさぜる。Then, fit the grooves of the temporary support 2 into the taper shoes [1] provided on the segments 1 near both the upper and lower ends where the temporary support 2 will be installed, and slide it toward the face side as shown in Figure 2. Move to position I.
なお、仮支柱２の摺動用としてジヤツキ（図示ゼず）等
を取りイ１１け、また仮支柱２の固定設置用としてスト
ッパ（図示ぜず）等を設（Ｊると、よい。In addition, it is recommended to provide a jack (not shown) for sliding the temporary support 2, and a stopper (not shown) for fixing the temporary support 2.
さらに、仮支柱２には、圧カセンザ２２や沈下量センサ
２３を取り付けてお（とよい。Furthermore, it is preferable to attach a pressure sensor 22 and a subsidence sensor 23 to the temporary support 2.
くハ〉ブレスＩ・レスの導入
全仮支柱２の設置が終了した後、シールド機を掘進させ
、」上記と同様の手順でセグメンｌ−１の組み立て及び
仮支柱２の設置作業を進める。Kuha〉Introduction of Breath I/Less After the installation of all temporary supports 2 is completed, the shield machine is excavated, and the assembly of segment 1-1 and the installation of temporary supports 2 are proceeded in the same manner as above.
そしてシールド機の掘進と同時に、シールド機の後方の
レグメント１のリングにおいては、公知の方法てブレス
Ｉ・レスの導入作業を行う。Simultaneously with the excavation of the shield machine, in the ring of segment 1 behind the shield machine, work is carried out to introduce a breath I/less by a known method.
〈二〉仮支柱の撤去
プレストレスを導入し、セグメント１のリングが所定の
強度を発現した後、全仮支柱２をテーパーシュー１１を
切羽と反対側に摺動させて撤去する。<2> Removal of temporary struts After prestress is introduced and the ring of segment 1 develops a predetermined strength, all temporary struts 2 are removed by sliding the tapered shoes 11 to the opposite side of the face.
以」二の作業を繰り返し行い、偏平Ｉ・ンネルの施工を
完了する。Repeat the above two steps to complete the construction of the flat I/channel.
〈作用〉
本発明は、リング内に設置した仮支柱２の支持力によっ
て、リングに作用する周囲の地山圧力に十分抵抗ずろこ
とができる。<Function> The present invention can sufficiently resist the surrounding ground pressure acting on the ring by the supporting force of the temporary support 2 installed within the ring.
そのため、リングにプレストレスを導入する以１１１１
にシールド機を掘進させ、リングをシールド機後方の地
山内に残しておいても、リングの所要の断面形状を確保
てきるという作用を有する。Therefore, the reason for introducing prestress into the ring is 1111
Even if the shield machine is used to excavate and the ring is left in the ground behind the shield machine, the required cross-sectional shape of the ring can be ensured.
〈その伯の実施ｆ９抄
以」二の実施例の他に、第３図に示すような小口径のト
ンネルの場合には、仮支柱２を中央部の一ケ所に設置す
れば足りる場合らあり、また、第４図に示すような縦長
の偏平トンネルにおいても、上記と同様の方法で良好な
施工を行うことかできる。In addition to the second embodiment of 〈Excerpt from Part 9 of the Project'', in the case of a tunnel of small diameter as shown in Fig. 3, it may be sufficient to install the temporary support 2 in one place in the center. Furthermore, even in the case of a vertically long flat tunnel as shown in FIG. 4, the same method as described above can be used to successfully construct the tunnel.
また、仮支柱２はリングの内周面間を支持し、周囲の地
山圧力に抵抗するためのものであるから、水平方向に設
置することも当然考えられる。Further, since the temporary supports 2 are used to support the inner peripheral surfaces of the ring and resist the pressure of the surrounding ground, it is naturally possible to install them in the horizontal direction.
例えば第５図に示すように、縦横１ｊ向に仮支柱２を設
置する場合も考えられる。For example, as shown in FIG. 5, temporary supports 2 may be installed in the vertical and horizontal directions 1j.
さらに、仮支柱２のその他の構造としては、上下方向の
長さをジヤツキ等で伸縮可能に構成し、仮支柱２の設置
、撒去作業が容易に行える構造す考えられる。Furthermore, another possible structure for the temporary support 2 is a structure in which the length in the vertical direction is expandable and contractible using a jack or the like, so that installation and removal of the temporary support 2 can be easily performed.
〈本発明の効果〕
本発明は以−Ｌ説明したようになるので、次のような効
果を期待することができる。<Effects of the Present Invention> Since the present invention is as explained below, the following effects can be expected.
くイ〉従来技術の場合、地山圧力の作用しないシールド
チー几内てプレストレスを導入し、セグメントのリング
強度が発現し、地山圧力に抵抗できる状態になった後で
なければシールド機は前進できない人口め、セグメント
のプレストレス導入が、シールドの掘進能率４低下さゼ
ろ原因となっている。In the case of the conventional technology, pre-stress is introduced in the shielding machine where the ground pressure does not act, and the shield machine cannot be used until after the ring strength of the segment is developed and it is in a state where it can resist the ground pressure. The population that can't move forward, the introduction of pre-stress in the segment is the reason why the shield's digging efficiency has decreased by 4 to 0.
それに対して本発明は、セグメントの組み立て後ブしノ
ストレスの導入［１；ｆに、リング内周面間を仮支柱に
よって支拮ずろ方法である。On the other hand, the present invention is a method in which the inner peripheral surfaces of the rings are supported by temporary struts after the segment is assembled and the stress is introduced [1;f].
そのため、シールドチー几後方にセグメントを組め立て
た場合においても、仮支柱の支持力によって周囲の地山
圧力に十分抵抗でき、リングの所要の断面形状を確保し
ながらプレストレスを行うことができる。Therefore, even when the segments are assembled behind the shield chi box, the supporting force of the temporary support can sufficiently resist the surrounding ground pressure, and prestressing can be performed while ensuring the desired cross-sectional shape of the ring.
ｉ＆って、シール）・の掘進作業と、セグメントのプレ
ストレス導入作業を独立しで行うことができ、レグメン
トのプレストレス導入作業に影響されることなく、シー
ルドの掘進能率を向」ニさせることかできる。It is possible to perform the excavation work of the seal (i&) and the prestress introduction work of the segment independently, and improve the shield excavation efficiency without being affected by the prestress introduction work of the segment. I can do it.
〈口〉セグメントのブレス）・レズ導入作業を、シー−
〆 −
−ルト機の後方で独立して行うことができろため、プレ
ストレスの導入作業に十分な作業時間をとることができ
る。<mouth> segment braces) and lesbian introduction work, sea-
Since this can be done independently behind the bolt machine, sufficient work time can be taken for the prestress introduction work.
そのため、セグメントのリングの品質管理または、作業
の安全ｌ １ｊｆｉ来と１ヒ較する七有利てある。Therefore, there are seven advantages in terms of quality control and work safety of the segment rings.
くハ〉仮支柱によりセグメントのリングの所要の断面形
状を保持しながら、プレストレスを導入することかでき
る。(c) Prestress can be introduced while maintaining the required cross-sectional shape of the ring of the segment by means of temporary struts.
そのため、変形のない断面形状のトンネルを措築するこ
とができる。Therefore, it is possible to construct a tunnel with a cross-sectional shape that does not undergo deformation.
く二〉プレストレスの導入時以外にセグメントリングに
異常荷重が作用した場合でも、仮支柱によって荷重を支
持することかできるため、リングの変形を防止すること
かできる。(2) Even if an abnormal load is applied to the segment ring at a time other than when prestress is introduced, the load can be supported by the temporary struts, so deformation of the ring can be prevented.
【図面の簡単な説明】 第１図 本発明の一実施例の説明図 第２図、仮支柱の設層゛説明図 第３〜５図 その他の実施例の説明図[Brief explanation of the drawing] Figure 1: Explanatory diagram of one embodiment of the present invention Figure 2: Explanatory diagram of temporary strut installation Figures 3 to 5: Explanatory diagrams of other embodiments
Claims (1)
を組み立て、リングを形成した後にプレストレスを導入
して行う偏平トンネルの施工方法において、 セグメントを組み立てた後に、リング内周面を仮支柱に
よって支持し、 次にプレストレスを導入し、所定のリング強度が生じた
後に仮支柱を撤去して行うことを特徴とする、 偏平トンネルの施工方法。(1) In the construction method for flat tunnels, which involves assembling segments in a shield tunnel with a flat cross-sectional shape and introducing prestress after forming a ring, after assembling the segments, the inner peripheral surface of the ring is supported by temporary supports. , A method for constructing flat tunnels, which is characterized by introducing prestressing and removing temporary supports after a predetermined ring strength is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63143583A JP2631864B2 (en) | 1988-06-13 | 1988-06-13 | Construction method of flat tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63143583A JP2631864B2 (en) | 1988-06-13 | 1988-06-13 | Construction method of flat tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01312196A true JPH01312196A (en) | 1989-12-15 |
| JP2631864B2 JP2631864B2 (en) | 1997-07-16 |
Family
ID=15342112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63143583A Expired - Lifetime JP2631864B2 (en) | 1988-06-13 | 1988-06-13 | Construction method of flat tunnel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2631864B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089267A (en) * | 2016-06-30 | 2016-11-09 | 中交航局第四工程有限公司 | Excavator auxiliary steel arch-shelf mounting process |
| US10304448B2 (en) | 2013-06-21 | 2019-05-28 | Microsoft Technology Licensing, Llc | Environmentally aware dialog policies and response generation |
| US10497367B2 (en) | 2014-03-27 | 2019-12-03 | Microsoft Technology Licensing, Llc | Flexible schema for language model customization |
| US10572602B2 (en) | 2013-06-21 | 2020-02-25 | Microsoft Technology Licensing, Llc | Building conversational understanding systems using a toolset |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01290899A (en) * | 1988-05-16 | 1989-11-22 | Maeda Corp | Intermittent stanchion construction in composite-cross section shield tunnel |
-
1988
- 1988-06-13 JP JP63143583A patent/JP2631864B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01290899A (en) * | 1988-05-16 | 1989-11-22 | Maeda Corp | Intermittent stanchion construction in composite-cross section shield tunnel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10304448B2 (en) | 2013-06-21 | 2019-05-28 | Microsoft Technology Licensing, Llc | Environmentally aware dialog policies and response generation |
| US10572602B2 (en) | 2013-06-21 | 2020-02-25 | Microsoft Technology Licensing, Llc | Building conversational understanding systems using a toolset |
| US10497367B2 (en) | 2014-03-27 | 2019-12-03 | Microsoft Technology Licensing, Llc | Flexible schema for language model customization |
| CN106089267A (en) * | 2016-06-30 | 2016-11-09 | 中交航局第四工程有限公司 | Excavator auxiliary steel arch-shelf mounting process |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2631864B2 (en) | 1997-07-16 |
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