JP2696420B2 - Enlargement method of existing sewer and tunnel excavator used for the method - Google Patents
Enlargement method of existing sewer and tunnel excavator used for the methodInfo
- Publication number
- JP2696420B2 JP2696420B2 JP2201354A JP20135490A JP2696420B2 JP 2696420 B2 JP2696420 B2 JP 2696420B2 JP 2201354 A JP2201354 A JP 2201354A JP 20135490 A JP20135490 A JP 20135490A JP 2696420 B2 JP2696420 B2 JP 2696420B2
- Authority
- JP
- Japan
- Prior art keywords
- existing
- cutter
- sewer
- existing sewer
- cutting
- 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 - Lifetime
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、既設管渠の撤去を行うと同時に拡幅した新
設管渠を構築する既設管渠の拡大工法及びその工法に使
用するトンネル掘削装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for enlarging an existing culvert for removing an existing culvert and at the same time constructing a new culvert widened, and a tunnel excavating device used for the method. It is about.
＜従来の技術＞ 既設管渠の拡幅工事に使用する装置としては、地山を
掘削する外側カッターと、既設管渠を切削撤去する内側
カッターとを備える掘削装置（特願平２−82919号）が
本出願人によって既に提案されている。<Conventional technology> As an apparatus used for widening work of an existing sewer, an excavator equipped with an outer cutter for excavating the ground and an inner cutter for cutting and removing the existing sewer (Japanese Patent Application No. 2-82919). Has already been proposed by the applicant.
この装置の掘削機構は、外側カッターを前胴部に設
け、構築した新設管渠の先端部を反力をとって既設管渠
外周部を環状に掘進し、また前記内側カッターを前記前
胴部に連続する後胴部に設け、前記外側カッターとは別
個に回転駆動させ、既設管渠を切削撤去するものであ
る。The excavating mechanism of this device is provided with an outer cutter on the front body, takes a tip end of the newly constructed sewer and takes a reaction force to excavate the outer periphery of the existing sewer in an annular shape, and furthermore, attaches the inner cutter to the front body. And is driven separately from the outer cutter to cut and remove the existing sewer.
＜発明が解決しようとする課題＞ しかし、二次覆工を施されたセグメント管路は大きな
強度を有し、かつ鉄筋や治具などが数多く埋め込まれて
おり、このような掘削装置の回転カッターによって一次
覆工と二次覆工とを同時に切削することは不可能であっ
た。実際に二次覆工が施されたセグメント管路の撤去を
行う場合には、人の手により二次覆工をブレーカ等を用
いて削り取らなければならず、効率が悪く、作業の安全
上も問題があった。<Problem to be Solved by the Invention> However, the secondary lined segment pipeline has a large strength, and many rebars and jigs are embedded therein. Therefore, it was impossible to cut the primary lining and the secondary lining at the same time. When actually removing a segment pipe with secondary lining, the secondary lining must be manually cut off using a breaker, etc., which is inefficient and requires less work safety. There was a problem.
本発明は上記不都合を解決せんとするものであり、そ
の目的は、二次覆工が施されたセグメント管路を効率よ
く撤去でき、その外周部に拡幅管渠を新たに構築するこ
とのできる既設管渠の拡大工法及びその工法に使用する
トンネル掘削装置を提供することにある。The present invention has been made to solve the above-described inconvenience, and an object of the present invention is to efficiently remove a segment pipe line subjected to secondary lining and to newly construct a widened sewer on an outer peripheral portion thereof. An object of the present invention is to provide a method for enlarging an existing sewer and a tunnel excavator used for the method.
＜課題を解決するための手段＞ 本発明は、上記目的に鑑みてなされたものであり、そ
の要旨は、外側カッターにて地山を切削すると共に、該
外側カッターとは別個に制御される内側カッターにて既
設管渠を切削撤去する既設管渠の拡大工法において、 前記外側カッターにて既設管渠の外周部の地山を掘削
する工程と、当該掘削と同時あるいは前後して、前記内
側カッターにて既設管渠の二次覆工部を切削撤去する工
程と、この後、残存した一次覆工部を解体撤去する工程
とからなり、 前記各工程を繰返し行うことにより、既設管渠を順次
撤去しつつ、新設管渠を構築することを特徴とする既設
管渠の拡大工法にある。<Means for Solving the Problems> The present invention has been made in view of the above-mentioned object, and the gist of the present invention is to cut ground with an outer cutter and to control the inner side separately from the outer cutter. In the method of enlarging an existing sewer by cutting and removing the existing sewer with a cutter, a step of excavating a ground around an outer peripheral part of the existing sewer with the outer cutter, and simultaneously or before and after the excavation, the inner cutter In the step of cutting and removing the secondary lining part of the existing sewer, and thereafter, the step of dismantling and removing the remaining primary lining part, by repeating the above steps, the existing sewer is sequentially There is a method of expanding an existing sewer characterized by constructing a new sewer while removing it.
また、本発明の他の要旨は、既設管渠外周部の地山を
環状に掘進する外側カッターと、前記既設管渠内側の二
次覆工を切削する内側カッターとを備え、一次覆工と二
次覆工とからなる既設管路の拡幅を行うトンネル掘削装
置において、 前記内側カッターを掘進方向前方および後方へ移動さ
せる可動支持手段を更に備えることを特徴とするトンネ
ル掘削装置にある。Further, another gist of the present invention is to provide an outer cutter for excavating the ground around the existing sewer in an annular shape and an inner cutter for cutting a secondary lining inside the existing sewer, and a primary lining. A tunnel excavator for widening an existing pipeline comprising a secondary lining, further comprising a movable support means for moving the inner cutter forward and backward in the excavation direction.
＜作用＞ 本発明に係る既設管渠の拡大工法は、まず、構築した
新設管渠の先端部に反力をとって、既設管渠外周部の地
山を環状に掘進し、かつこの掘進と同時又は前後して既
設管渠内周の二次覆工を切削撤去する。次に、残存する
一次覆工を順次解体撤去し、この後、前記新設管渠の先
端部に連続して新設管渠を構築する。この各工程を繰り
返し行うことにより、新設管渠を構築するものである。<Operation> In the method for enlarging an existing sewer according to the present invention, first, a reaction force is applied to the tip of the newly constructed sewer, the ground around the outer periphery of the existing sewer is dug annularly, and this excavation is performed. At the same time or before and after, the secondary lining on the inner circumference of the existing sewer is cut and removed. Next, the remaining primary linings are sequentially dismantled and removed, and thereafter, a new culvert is constructed continuously at the tip of the new culvert. By repeating these steps, a new pipe is constructed.
また、本発明に係るトンネル掘削装置は、外側カッタ
ーによって既設管渠外周部の地山を環状に掘進し、内側
カッターによって二次覆工を切削撤去する。この後、二
次覆工を所定区間、切削撤去した内側カッターを、前記
可動支持手段によって、掘進方向前方又は後方に移動
し、この移動によって一次覆工を撤去するための作業ス
ペースを確保する。Further, the tunnel excavator according to the present invention excavates the ground around the outer periphery of the existing sewer in an annular shape by the outer cutter, and cuts and removes the secondary lining by the inner cutter. Thereafter, the inner cutter, which has been cut and removed in the secondary lining for a predetermined section, is moved forward or rearward in the excavation direction by the movable support means, and this movement secures a work space for removing the primary lining.
＜実施例＞ 本発明に係るトンネル掘削装置を第１図〜第３図に基
づいて説明する。<Example> A tunnel excavator according to the present invention will be described with reference to Figs.
トンネル掘削装置としてのシールド掘削装置10は、セ
グメント41aにより構築した一次覆工41の外周部を環状
に掘削するため、一次覆工41の外径よりも大なる内径を
有する外側カッター20と、場所打ちコンクリートによる
二次覆工42を切削撤去するため、二次覆工42の径に合わ
せて形成した内側カッター30とを備える。内側カッター
30は、シールド掘削装置内で掘進方向前方及び後方に移
動可能なように可動支持手段としての内側推進ジャッキ
50を介して支持されている。The shield digging device 10 as a tunnel digging device includes an outer cutter 20 having an inner diameter larger than an outer diameter of the primary lining 41 for annularly digging an outer peripheral portion of the primary lining 41 constructed by the segment 41a, In order to cut and remove the secondary lining 42 made of cast concrete, an inner cutter 30 formed according to the diameter of the secondary lining 42 is provided. Inner cutter
30 is an inner propulsion jack as a movable support means so that it can move forward and backward in the excavation direction within the shield excavator.
Supported through 50.
外側カッター20のカッター面には、所定間隔で開孔部
22を形成し、各開孔部22には複数の掘削ビット23を設け
ており、また内側カッター30の環状のカッター面には、
所定の間隔で開孔部31を形成し、各開孔部31にはそれぞ
れローラビット32を設けている。また、外側カッター20
はモータ24、及び内側カッター30はモータ33とそれぞれ
別個のモータによって回転駆動する。The cutter surface of the outer cutter 20 has openings at predetermined intervals.
A plurality of excavation bits 23 are provided in each opening 22 and an annular cutter surface of the inner cutter 30 includes:
The openings 31 are formed at predetermined intervals, and each of the openings 31 is provided with a roller bit 32. Also, the outer cutter 20
The motor 24 and the inner cutter 30 are driven to rotate by motors separate from the motor 33, respectively.
既設管渠40と外側カッター20との間隙には、シール部
材25を配設し、地山の掘削の際にシールド掘削装置10内
に土砂、地下水が浸入するのを防止し、切羽の安定を維
持する。A seal member 25 is provided in the gap between the existing sewer 40 and the outer cutter 20 to prevent earth and sand and groundwater from entering the shield excavator 10 when excavating the ground, and to stabilize the face. maintain.
掘削に当っては切羽を維持しつつ地山の掘削を行うた
め、外側カッター20の泥水チャンバー28内に送水管26を
通して矢印Ｘ方向に泥水を圧入する。また、掘削したズ
リは矢印Ｙ方向に排水管27を通して泥水と共に排出す
る。In excavation, muddy water is pressed into the muddy water chamber 28 of the outer cutter 20 in the direction of the arrow X through the water pipe 26 in order to excavate the ground while maintaining the face. The excavated waste is discharged together with the muddy water through the drain pipe 27 in the arrow Y direction.
次に既設管渠の拡大工法の一実施例を、第４図（ａ）
〜（ｃ）に基づいて工程順に説明する。Next, one embodiment of the method of enlarging the existing sewer is shown in FIG.
The steps will be described in order based on (c).
先ず、新設管渠の先端部のセグメント43に反力をとり
ながら、外側推進ジャッキ29を伸長させ、モーター24を
付勢する。これにより外側カッター20によって既設管渠
40の外周部の地山を環状に掘削する（第４図（ａ））。
このとき、内側推進ジャキ50を伸長させ、内側カッター
30を掘進方向後方に位置させておく。これにより、シー
ルド掘進装置10の掘進スペースを確保しておく。また、
この掘削に際して泥水チャンバー28には、送水管26を通
して泥水を圧入し、掘削したズリは排水管27を通して排
出する。First, the outer propulsion jack 29 is extended and the motor 24 is energized while applying a reaction force to the segment 43 at the distal end of the newly installed sewer. This allows the existing culvert to be
The ground around the outer periphery of 40 is excavated in an annular shape (FIG. 4 (a)).
At this time, extend the inner propulsion jack 50 and
30 is located rearward in the direction of excavation. Thereby, the excavation space of the shield excavation device 10 is secured. Also,
During this excavation, muddy water is injected into the muddy water chamber 28 through the water pipe 26, and the excavated waste is discharged through the drainage pipe 27.
掘進を続け、内側カッター30の先端部が既設管渠40の
後端部付近に達した時点でモーター24を非勢し、外側カ
ッター20により地山を掘削を一次中断する。When the excavation is continued, the motor 24 is deenergized when the tip of the inner cutter 30 reaches near the rear end of the existing sewer 40, and excavation of the ground by the outer cutter 20 is temporarily interrupted.
次に、モーター33を付勢し、内側カッター30を回転さ
せる。これに共って内側推進ジャッキ50を収縮して内側
カッター30を前進させ、既設管渠40の二次覆工42のみを
切削撤去する。切削したズリはベルトコンベア（図示せ
ず）等で管渠外部に搬出する。この切削を続け、一次覆
工後端部のセグメント41bが露出した時点でモーター33
を非勢し、更に内側推進ジャッキ50の収縮を停止し、内
側カッター30による二次覆工の切削を一次中断する（第
４図（ｂ））。Next, the motor 33 is energized to rotate the inner cutter 30. Along with this, the inner propulsion jack 50 is contracted to advance the inner cutter 30, and only the secondary lining 42 of the existing culvert 40 is cut and removed. The cut waste is carried out of the sewer by a belt conveyor (not shown) or the like. This cutting was continued, and when the segment 41b at the rear end of the primary lining was exposed, the motor 33
, The contraction of the inner propulsion jack 50 is stopped, and the cutting of the secondary lining by the inner cutter 30 is temporarily interrupted (FIG. 4 (b)).
次に、内側推進ジャッキ50を伸長して内側カッター30
を後退させ、セグメント41bの解体用の作業スペースを
得る（第４図（ｃ））。この作業スペースを利用して人
力又は機械的手段により継手ボルトを切断し後端部の一
次覆工を解体する。解体終了後、外側推進ジャッキ29を
収縮して、この空きスペースに新設管渠を構築する。Next, the inner propulsion jack 50 is extended and the inner cutter 30 is extended.
Is retracted to obtain a work space for dismantling the segment 41b (FIG. 4 (c)). Using this work space, the joint bolt is cut by manual or mechanical means, and the primary lining at the rear end is disassembled. After dismantling, the outer propulsion jack 29 is contracted to construct a new sewer in this empty space.
新設管渠の構築後、再び外側推進ジャッキ29を伸長さ
せ、新設管渠先端部に反力をとって既設管渠40の外周部
を環状に掘削する。以後、前記各工程を繰り返すことに
より、新設管渠を順次構築するものである。After the construction of the new sewer, the outer propulsion jack 29 is extended again, and a reaction force is applied to the tip of the new sewer to excavate the outer periphery of the existing sewer 40 in a ring shape. Thereafter, the above-described steps are repeated to sequentially construct a new sewer.
本実施例では外側カッター20で地山を掘削した後、内
側カッター30で二次覆工を切削する例を示したが、外側
カッター20の掘削と同時か或いは前後して内側カッター
30の切削を行うことも可能である。In this embodiment, after excavating the ground with the outer cutter 20, an example in which the secondary lining is cut with the inner cutter 30 is shown.
It is also possible to make 30 cuts.
＜効果＞ 本発明に係る既設管渠の拡大工法は、外側カッターに
よって既設管渠外周部の地山を環状に掘進し、かつ内側
カッターによって既設管渠内側の二次覆工を切削撤去す
る工程と、残存する一次覆工を順次解体する工程と、前
記環状に掘削した既設管渠の外周部に新設管渠を構築る
工程とを繰返す工法を採用したので、一次覆工と二次覆
工とから成る既設管渠の拡幅敷設換えを効率良く行うこ
とができる。<Effect> In the method of enlarging an existing sewer according to the present invention, a step of digging the ground around the existing sewer in an annular shape with an outer cutter and cutting and removing a secondary lining inside the existing sewer with an inner cutter. And a step of sequentially dismantling the remaining primary lining and a step of constructing a new culvert on the outer periphery of the existing culvert dug out in a ring form, so that the primary lining and the secondary lining are repeated. It is possible to efficiently perform the widening replacement of the existing sewer composed of the following.
また、本発明に係るトンネル掘削装置は、既設管渠外
周部を環状に掘進する外側カッターと、二次覆工を切削
する内側カッターとを備え、前記内側カッターには掘進
方向前方及び後方へ移動可能にする可動支持手段を設け
たので、二次覆工を切削撤去した内側カッターを前記可
動支持手段によってスライドさせることにより、一次覆
工解体用の作業スペースを確保できる。従って、一次覆
工と二次覆工とから成る既設管渠の拡幅敷設換えを効率
良く行うことができる。In addition, the tunnel excavator according to the present invention includes an outer cutter for excavating an outer circumference of an existing sewer in an annular shape and an inner cutter for cutting a secondary lining, and the inner cutter moves forward and backward in the excavation direction. Since the movable support means is provided, the inner cutter from which the secondary lining has been cut and removed is slid by the movable support means, so that a working space for dismantling the primary lining can be secured. Therefore, it is possible to efficiently perform the widening replacement of the existing sewer composed of the primary lining and the secondary lining.
第１図は本発明に係るシールド掘削装置10の側面を示す
断面図、第２図は外側カッターのカッター面を示す第１
図における線Ａ−Ａ断面図、第３図は内側カッターのカ
ッター面も示す第１図における線Ｂ−Ｂ断面図、第４図
（ａ）、（ｂ）、（ｃ）は既設管渠の撤去方法を工程順
に示すシールド掘削装置の側面を示す断面図である。 10……シールド掘削装置、20……外側カッター、30……
内側カッター、40……既設管渠、41……一次覆工、42…
…二次覆工、50……内側推進ジャッキ（可動支持手
段）。FIG. 1 is a sectional view showing a side surface of a shield excavator 10 according to the present invention, and FIG. 2 is a first view showing a cutter surface of an outer cutter.
FIG. 3 is a sectional view taken along the line AA in FIG. 3, FIG. 3 is a sectional view taken along the line BB in FIG. 1 also showing the cutter surface of the inner cutter, and FIGS. It is sectional drawing which shows the side surface of the shield digging apparatus which shows a removal method in process order. 10 ... Shield drilling rig, 20 ... Outer cutter, 30 ...
Inner cutter, 40 …… Existing sewer, 41 …… Primary lining, 42…
… Secondary lining, 50… Inward propulsion jack (movable support means).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡本 和之 兵庫県神戸市兵庫区和田崎町１丁目１番 １号 三菱重工業株式会社神戸造船所内 (56)参考文献 特開 平２−140396（ＪＰ，Ａ) 特開 平３−288080（ＪＰ，Ａ) 特開 平３−206290（ＪＰ，Ａ) 特開 平３−206291（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuyuki Okamoto 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Prefecture Inside Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (56) References JP-A-3-288080 (JP, A) JP-A-3-206290 (JP, A) JP-A-3-206291 (JP, A)
Claims (2)
該外側カッターとは別個に制御される内側カッターにて
既設管渠を切削撤去する既設管渠の拡大工法において、 前記外側カッターにて既設管渠の外周部の地山を掘削す
る工程と、当該掘削と同時あるいは前後して、前記内側
カッターにて既設管渠の二次覆工部を切削撤去する工程
と、この後、残存した一次覆工部を解体撤去する工程と
からなり、 前記各工程を繰返し行うことにより、既設管渠を順次撤
去しつつ、新設管渠を構築することを特徴とする既設管
渠の拡大工法。(1) While cutting the ground with an outer cutter,
In the method of expanding an existing sewer by cutting and removing an existing sewer with an inner cutter controlled separately from the outer cutter, a step of excavating a ground around an outer peripheral part of the existing sewer with the outer cutter, Simultaneously or before and after the excavation, a step of cutting and removing the secondary lining part of the existing duct with the inner cutter, and a step of dismantling and removing the remaining primary lining part thereafter, The method of enlarging existing sewers is characterized by constructing new sewers while repeatedly removing existing sewers by repeating the above steps.
側カッターと、前記既設管渠内側の二次覆工を切削する
内側カッターとを備え、一次覆工と二次覆工とからなる
既設管路の拡幅を行うトンネル掘削装置において、 前記内側カッターを掘進方向前方および後方へ移動させ
る可動支持手段を更に備えることを特徴とするトンネル
掘削装置。2. An outer cutter for annularly excavating a ground around an existing sewer, and an inner cutter for cutting a secondary lining inside the existing sewer, wherein a primary lining and a secondary lining are provided. A tunnel excavator for widening an existing pipeline comprising: a movable support means for moving the inner cutter forward and backward in the excavation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2201354A JP2696420B2 (en) | 1990-07-31 | 1990-07-31 | Enlargement method of existing sewer and tunnel excavator used for the method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2201354A JP2696420B2 (en) | 1990-07-31 | 1990-07-31 | Enlargement method of existing sewer and tunnel excavator used for the method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0489992A JPH0489992A (en) | 1992-03-24 |
| JP2696420B2 true JP2696420B2 (en) | 1998-01-14 |
Family
ID=16439650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2201354A Expired - Lifetime JP2696420B2 (en) | 1990-07-31 | 1990-07-31 | Enlargement method of existing sewer and tunnel excavator used for the method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2696420B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235287A (en) * | 1993-02-08 | 1994-08-23 | Kawasaki Heavy Ind Ltd | Widening tunnel excavator |
| JP2004003209A (en) * | 2002-05-31 | 2004-01-08 | Fukuda Corp | Method for replacing existing pipe |
| JP5539245B2 (en) * | 2011-03-08 | 2014-07-02 | 株式会社奥村組 | How to update existing pipelines |
| CN104110040B (en) * | 2013-04-16 | 2017-03-29 | 中冶天工上海十三冶建设有限公司 | Newly-built push pipe well and old pipe well connection construction method |
| JP6238452B2 (en) * | 2013-05-21 | 2017-11-29 | 三井住友建設株式会社 | Existing tunnel dismantling method |
| KR101482592B1 (en) * | 2013-06-12 | 2015-01-14 | 한국철도기술연구원 | Equipment for enlarging train tunnel considering operation of railroad, and method for the same |
| KR101416716B1 (en) * | 2013-07-19 | 2014-07-09 | 경일건설(주) | rotary table of excavation device of having water jet |
| KR101482590B1 (en) * | 2013-09-02 | 2015-01-14 | 한국철도기술연구원 | Equipment for enlarging train tunnel for connecting boring machine and operation vehicle considering operation of train, and method for the same |
-
1990
- 1990-07-31 JP JP2201354A patent/JP2696420B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0489992A (en) | 1992-03-24 |
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