JPH04174191A - Effective cross section forming shield excavator - Google Patents
Effective cross section forming shield excavatorInfo
- Publication number
- JPH04174191A JPH04174191A JP2300688A JP30068890A JPH04174191A JP H04174191 A JPH04174191 A JP H04174191A JP 2300688 A JP2300688 A JP 2300688A JP 30068890 A JP30068890 A JP 30068890A JP H04174191 A JPH04174191 A JP H04174191A
- Authority
- JP
- Japan
- Prior art keywords
- steel shell
- section
- effective cross
- soil
- cylindrical steel
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 239000002689 soil Substances 0.000 claims abstract description 37
- 230000005641 tunneling Effects 0.000 claims description 21
- 239000004576 sand Substances 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 2
- 208000015181 infectious disease Diseases 0.000 abstract 1
- 239000004848 polyfunctional curative Substances 0.000 abstract 1
- 230000001141 propulsive effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、トンネルを構築するためのシールド掘進機に
おいて、利用トンネルの形状に合わせて有効な断面を得
ることができる有効断面形成シールド掘進機に関するも
のである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a shield tunneling machine for forming an effective cross section that can obtain an effective cross section according to the shape of the tunnel to be used, in a shield tunneling machine for constructing tunnels. It is related to.
周知のごとくシールド掘進機を用いたトンネル工事では
、シールド掘進機本体を構成する円筒鋼殻の前面に配し
たカッターホイール（カッターヘッド）を回転させるこ
とにより、シールド掘進機本体の外径とほぼ同径のトン
ネルを掘削するとともに、掘削した土砂をシールド掘進
機本体から後方へ排出しながら、セグメント等のライニ
ング材をシールド掘進機本体に設けた推進ジャダキで押
してその反力でシールド掘進機本体を前進させる。As is well known, in tunnel construction using a shield tunneling machine, by rotating a cutter wheel (cutter head) placed on the front of the cylindrical steel shell that constitutes the shield tunneling machine body, a cutter wheel (cutter head) placed on the front side of the cylindrical steel shell that makes up the shield tunneling machine body is rotated. While excavating a tunnel with the same diameter as the main body of the shield excavator, the excavated earth and sand are discharged backward from the main body of the shield excavator, and the lining material such as segments is pushed by a propulsion jack installed on the main body of the shield excavator, and the reaction force moves the main body of the shield excavator forward. let
そして、推進ジヤツキが１ストローク伸びたならば、推
進を中断してシールド掘進機本体内で新たなライニング
材を継ぎ足し、このような工程を順次繰り返して円筒状
のトンネルを構築するものである。When the propulsion jack has extended one stroke, propulsion is interrupted and new lining material is added inside the shield tunneling machine body, and this process is repeated one after another to construct a cylindrical tunnel.
このようにシールド掘進機本体の外径は前面のカッター
ホイールの回転機能上、カッターホイールの回転軸を中
心とした円筒形の鋼殻が用いられ、ライニング材もほぼ
同形の円筒形に組まれる。In this way, the outer diameter of the shield tunneling machine body is a cylindrical steel shell centered on the rotational axis of the cutter wheel due to the rotation function of the cutter wheel on the front, and the lining material is also assembled into a substantially identical cylindrical shape.
一方、トンネルを利用する車輌等形状は矩形が多く、円
形断面のトンネルとの間に著しい未利用空間が生じ、構
築材料及び発生土砂処分の不経済が生じている。On the other hand, many vehicles that use tunnels are rectangular in shape, leaving a significant amount of unused space between tunnels and tunnels with circular cross sections, resulting in uneconomical use of construction materials and disposal of generated soil.
本発明の目的は前記従来例の不都合を解消し、矩形等の
有効断面形成が可能なシールド掘進機を提供することに
ある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the disadvantages of the conventional example and to provide a shield excavator capable of forming an effective cross section such as a rectangle.
本発明は前記目的を達成するため、前面にカッターホイ
ールを配置したシールド掘進機で、シールド掘進機本体
を構成する円筒鋼殻のテール部内側に有効断面用鋼殻を
同心的に設け、シールド掘進機の推進ジヤツキはこの有
効断面用鋼殻の内側に配設するとともに、円筒鋼殻と有
効断面用鋼殻間にジヤツキによる押出し転圧装置の転圧
板を介在させ、同じく円筒鋼殻と有効断面用鋼殻間で該
転圧板の後方に前記カッターホイール後方のチャンバか
ら取り入れた土砂を搬送する土砂搬送装置の送出口を開
口したこと、及び、土砂搬送装置は、チャンバに開口す
る掘削土取込装置と、この掘削土取込装置から土砂を受
け入れる混合プラントと、混合プラントから円筒鋼殻と
有効断面用鋼殻間に改良土を送出す改良土圧入装置とか
らなることを要旨とするものである。In order to achieve the above-mentioned object, the present invention is a shield tunneling machine with a cutter wheel arranged on the front surface, and a steel shell for an effective cross section is concentrically provided inside the tail part of a cylindrical steel shell constituting the main body of the shield tunneling machine. The propulsion jack of the machine is disposed inside this steel shell for effective cross section, and a rolling plate of an extrusion compaction device using jacks is interposed between the cylindrical steel shell and the steel shell for effective cross section, and the cylindrical steel shell and the steel shell for effective cross section are A discharge port of an earth and sand conveying device for conveying earth and sand taken in from a chamber behind the cutter wheel is opened behind the compaction plate between the steel shells, and the earth and sand conveying device has an excavated earth intake opening in the chamber. The equipment consists of a mixing plant that receives earth and sand from the excavated soil intake equipment, and an improved soil injection equipment that sends improved soil from the mixing plant between the cylindrical steel shell and the effective section steel shell. be.
請求項第１項記載の本発明によれば、地盤の掘削はシー
ルド掘進機本体を構成する円筒鋼殻の前面のカッターホ
イールでなされ、円形のトンネル掘削が行われるが、ラ
イニング材としてのセグメント等は有効断面用鋼殻内で
この鋼殻の形状に合わせて有効断面を得るのに必要な形
状、例えば矩形に組まれる。According to the present invention as set forth in claim 1, the ground is excavated using a cutter wheel on the front side of the cylindrical steel shell constituting the main body of the shield tunneling machine, and a circular tunnel is excavated. are assembled in a steel shell for effective cross section into a shape necessary to obtain an effective cross section, for example, a rectangular shape, in accordance with the shape of this steel shell.
そして、シールド掘進機本体はこのライニング材を反力
として推進ジヤツキで推進するが、それと同時にまたは
前後して、カッターホイールで掘削した切羽の土砂の一
部は土砂搬送装置で有効断面用鋼殻外周に押し出され、
かつ押出し転圧装置の転圧板で圧密されなからうイニン
グ材外周と円形掘削との隙間を充填していくので、テー
ルボイドを生じることなく有効断面のトンネル形成がな
される。Then, the main body of the shield excavator is propelled by a propulsion jack using this lining material as a reaction force, but at the same time or before and after this, a part of the earth and sand excavated by the cutter wheel is transferred to the earth and sand conveying device around the outer circumference of the steel shell for effective cross section. pushed out,
In addition, since the gap between the outer periphery of the ining material that is not compacted by the rolling plate of the extrusion rolling device and the circular excavation is filled, a tunnel with an effective cross section can be formed without producing tail voids.
請求項第２項記載の本発明によれば、前記作用に加えて
、ライニング材外周と円形掘削との隙間に充填する土砂
は改良土であり、ライニング材（覆工材）の一部として
外力を分担し、ライニング材の軽減化を図ることができ
る。According to the present invention as set forth in claim 2, in addition to the above-mentioned effects, the earth and sand filled in the gap between the outer periphery of the lining material and the circular excavation is improved soil, and as part of the lining material (lining material), external force is applied. It is possible to reduce the amount of lining material required.
以下、図面について本発明の実施例を詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明の有効断面形成シールド掘進機の１実施
例を示す縦断側面図で、図中１はシールド掘進機本体を
構成する円筒鋼殻である。FIG. 1 is a longitudinal sectional side view showing one embodiment of a shield tunneling machine with an effective cross section according to the present invention, and numeral 1 in the figure is a cylindrical steel shell constituting the main body of the shield tunneling machine.
この円筒鋼殻１の前面にはカッターホイール２を配置し
、その後方には隔壁３によりチャンバ４が構成され、該
チャンバ４から後方へ向けてスクリュー式の排土装置５
を設ける。A cutter wheel 2 is disposed on the front side of the cylindrical steel shell 1, and a chamber 4 is formed behind it by a partition wall 3. A screw-type earth removal device 5 extends rearward from the chamber 4.
will be established.
以上は通常のシールド掘進機と同じであるが、本発明は
この円筒鋼殻１のテール部１ａの内側に有効断面用鋼殻
６を同心的に設けた。The above is the same as a normal shield tunneling machine, but in the present invention, a steel shell 6 for effective cross section is provided concentrically inside the tail portion 1a of this cylindrical steel shell 1.
この有効断面用鋼殻６はトンネルの有効断面に形状を合
致させるもので、その形状は矩形断面や楕円形断面など
適宜に選択できる。The effective cross section steel shell 6 has a shape that matches the effective cross section of the tunnel, and its shape can be selected as appropriate, such as a rectangular cross section or an elliptical cross section.
また有効断面用鋼殻６の後端は円筒鋼殻１に対し後方へ
突出し、前端は円筒鋼殻１に連結する仕切壁７で円筒鋼
殻１との間を閉塞した。Further, the rear end of the effective section steel shell 6 protrudes rearward with respect to the cylindrical steel shell 1, and the front end closes off the space between the cylindrical steel shell 1 and the cylindrical steel shell 1 by a partition wall 7 connected to the cylindrical steel shell 1.
そして、有効断面用鋼殻６の内側に推進ジヤツキ８と図
示は省略するがエレクタ−を設け、また円筒鋼殻１の内
側に設けたジヤツキによる押出し転圧装置９０ロンドを
前記仕切壁７を貫通させて円筒鋼殻１と有効断面用鋼殻
６との間に突出させ、その先端に転圧板９ａを設ける。Then, a propulsion jack 8 and an erector (not shown) are provided inside the steel shell 6 for effective cross section, and an extrusion compaction device 90 with a jack provided inside the cylindrical steel shell 1 is passed through the partition wall 7. It is made to protrude between the cylindrical steel shell 1 and the steel shell 6 for effective cross section, and a rolling plate 9a is provided at its tip.
前記チャンバ４にはスクリュー式の掘削土取込装置１０
の一端を開口し、この掘削土取込装置１０の他端は円筒
鋼殻１内に設けた混合プラント１１に連結した。この混
合プラント１１は土砂にセメントミルク等の硬化剤を添
加し攪拌するものである。A screw type excavated soil intake device 10 is installed in the chamber 4.
One end of the excavated soil intake device 10 was opened, and the other end of the excavated soil intake device 10 was connected to a mixing plant 11 provided within the cylindrical steel shell 1. This mixing plant 11 is for adding a hardening agent such as cement milk to earth and sand and stirring the mixture.
図中１７は硬化剤の注入管で、その先端は混合プラン１
−１１に接続され、途中にバルブ１７ａを有する。In the figure, 17 is the curing agent injection pipe, the tip of which is the mixing plan 1.
-11, and has a valve 17a in the middle.
混合プラン目１に一端を連結したスクリュー式の改良土
圧入装置１２は途中にストップバルブ１３を有するがそ
の他端は、前記円筒鋼殻１と有効断面用鋼殻６間で該転
圧板９ａの後方に送出口として開口した。The screw-type improved soil injection device 12 has one end connected to the mixing plan 1, and has a stop valve 13 in the middle, and the other end is connected between the cylindrical steel shell 1 and the steel shell 6 for effective cross section, behind the rolling plate 9a. It was opened as a delivery port.
これら掘削土取込装置１０、混合プラン目１、改良土圧
入装置１２はチャンバ４から取り入れた土砂を円筒鋼殻
１と有効断面用鋼殻６間に搬送する土砂搬送装置を構成
するものであるが、改良土を必要としない場合にはこの
混合プラント１１を省略して１個の掘削土取込装置で直
接掘削土を円筒鋼殻１と有効断面用鋼殻６間に送り出す
ようにすることもある。These excavated soil intake device 10, mixing plan 1, and improved soil injection device 12 constitute a soil conveying device that conveys the soil taken in from the chamber 4 between the cylindrical steel shell 1 and the effective section steel shell 6. However, if improved soil is not required, this mixing plant 11 can be omitted and the excavated soil can be directly sent between the cylindrical steel shell 1 and the effective section steel shell 6 using one excavated soil intake device. There is also.
次に、本考案のシールド掘進機を使用するシールド工法
でついて説明する。Next, the shield construction method using the shield excavator of the present invention will be explained.
シールド掘進機本体を構成する円筒鋼殻１の前面のカッ
ターホイール２が回転駆動されると、このカッターホイ
ール２のカンタ−フェイスで地盤の掘削がなされ、円形
のトンネル掘削が行われる。When the cutter wheel 2 on the front side of the cylindrical steel shell 1 constituting the main body of the shield tunneling machine is driven to rotate, the ground is excavated by the canter face of the cutter wheel 2, and a circular tunnel is excavated.
掘削土砂はカッターホィール２後面のチャンバ４に入り
、大部分は排土装置５で後方に搬送され排出されるが、
一部は掘削土取込装置１０から混合プラント１１に入り
、ここで注入管１７からの硬化剤を添加され適宜攪拌さ
れて改良土に変更される。The excavated earth and sand enters the chamber 4 at the rear of the cutter wheel 2, and most of it is conveyed rearward and discharged by the earth removal device 5.
A part of the excavated soil enters the mixing plant 11 from the excavated soil intake device 10, where a hardening agent is added from the injection pipe 17, and the excavated soil is appropriately stirred and converted into improved soil.
図中１４はセグメント等のライニング材で、これは有効
断面用鋼殻６内でエレクタ−により、この鋼殻６の形状
に合わせて有効断面を得るのに必要な形状、例えば矩形
に組まれたものである。In the figure, reference numeral 14 denotes a lining material such as a segment, which is assembled by an erector in the steel shell 6 for effective cross section into a shape necessary to obtain an effective cross section according to the shape of the steel shell 6, for example, a rectangular shape. It is something.
ライニング材１４をなすものとしては、コンクリート製
や鋼製のセグメントが好適であるが、その他に支保工材
とプレキャスト平板との組合せなどでもよい。The lining material 14 is preferably made of concrete or steel segments, but may also be a combination of shoring materials and precast flat plates.
シールド掘進機はこの既設のライニング材１４を反力と
して推進ジヤツキ８で推進する。The shield tunneling machine is propelled by a propulsion jack 8 using the existing lining material 14 as a reaction force.
そして、推進ジヤツキ８が１ストローク伸びたならば、
推進を中断して有効断面用鋼殻６内で新たなライニング
材１４を継ぎ足す。And if the propulsion jack 8 extends by one stroke,
Propulsion is interrupted and new lining material 14 is added within the steel shell 6 for effective section.
かかるシールド掘進機の推進と同時にまたは前後して、
前記混合プラン）１１の改良土は改良土圧入装置１２で
有効断面用鋼殻６の外周で円筒鋼殻１との間に押し出さ
れ、この改良±１５は押出し転圧装置９の転圧板で９ａ
で圧密されながら充填されていく。Simultaneously with or before the propulsion of such a shield tunneling machine,
The improved soil of the mixing plan) 11 is pushed out between the outer periphery of the steel shell 6 for effective section and the cylindrical steel shell 1 by the improved soil press-in device 12, and this improved soil of ±15 is pushed out by the rolling plate of the extrusion rolling device 9.
It is filled while being compacted.
このようにして、第２図に示すように有効断面形状に組
まれたライニング材１４の周囲は改良±１５で充填され
たトンネルが施工できるものである。In this way, as shown in FIG. 2, a tunnel filled with an improvement of ±15 can be constructed around the lining material 14 assembled into an effective cross-sectional shape.
前記ライニング材１４の組まれた状態の断面形は第３図
に示すように矩形以外に楕円形等があり、その場合は有
効断面用鋼殻６の断面も楕円形である。As shown in FIG. 3, the cross-sectional shape of the assembled lining material 14 may be elliptical in addition to rectangular, and in this case, the cross-section of the steel shell 6 for effective cross-section is also elliptical.
以上述べたように本発明の有効断面形成シールド掘進機
は、矩形等の有効断面形成が可能なものであり、従来の
ように円形断面のトンネルとの間に著しい未利用空間が
生じることがなく、構築材料及び発生土砂処分の不経済
が生しることを防止できるものである。As described above, the shield tunneling machine for forming an effective cross section of the present invention is capable of forming an effective cross section such as a rectangle, and there is no significant unused space between the tunnel and the circular cross section unlike in the past. , it is possible to prevent the uneconomical effects of construction materials and disposal of generated soil.
また、ライニング材外周に改良土を充填できるようにし
たので、この部分はライニング材の一部として外力を分
担し、ライニング材の軽減化を図ることができるもので
ある。Furthermore, since the outer periphery of the lining material can be filled with improved soil, this part can share external forces as part of the lining material, thereby reducing the weight of the lining material.
第１図は本発明の有効断面形成シールド掘進機の１実施
例を示す縦断側面図、第２図、第３図は施工されるトン
ネル形状を示す説明図である。
■・・・円筒鋼殻 １ａ・・・テール部２・・
・カッターホイールFIG. 1 is a longitudinal sectional side view showing one embodiment of the shield tunneling machine for forming an effective cross section of the present invention, and FIGS. 2 and 3 are explanatory diagrams showing the shape of a tunnel to be constructed. ■...Cylindrical steel shell 1a...Tail part 2...
・Cutter wheel
Claims (2)
機で、シールド掘進機本体を構成する円筒鋼殻のテール
部内側に有効断面用鋼殻を同心的に設け、シールド掘進
機の推進ジャッキはこの有効断面用鋼殻の内側に配設す
るとともに、円筒鋼殻と有効断面用鋼殻間にジャッキに
よる押出し転圧装置の転圧板を介在させ、同じく円筒鋼
殻と有効断面用鋼殻間で該転圧板の後方に前記カッター
ホィール後方のチャンバから取り入れた土砂を搬送する
土砂搬送装置の送出口を開口したことを特徴とする有効
断面形成シールド掘進機。(1) A shield tunneling machine with a cutter wheel placed on the front. A steel shell for an effective cross section is installed concentrically inside the tail of the cylindrical steel shell that makes up the main body of the shield tunneling machine, and the propulsion jack of the shield tunneling machine is At the same time, a rolling plate of an extrusion rolling device using a jack is interposed between the cylindrical steel shell and the steel shell for effective section, and the rolling plate is also placed inside the steel shell for cross section, and 1. A shield excavator for forming an effective cross section, characterized in that a discharge port of an earth and sand conveying device for conveying earth and sand taken in from a chamber behind the cutter wheel is opened at the rear of the pressure plate.
装置と、この掘削土取込装置から土砂を受け入れる混合
プラントと、混合プラントから円筒鋼殻と有効断面用鋼
殻間に改良土を送出す改良土圧入装置とからなる請求項
第１項記載の有効断面形成シールド掘進機。(2) The earth and sand transport device includes an excavated soil intake device that opens into a chamber, a mixing plant that receives earth and sand from the excavated soil intake device, and a mixing plant that transfers improved soil between the cylindrical steel shell and the steel shell for effective section. An effective cross-section forming shield excavator according to claim 1, comprising an improved soil injection device for sending out improved soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2300688A JPH04174191A (en) | 1990-11-06 | 1990-11-06 | Effective cross section forming shield excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2300688A JPH04174191A (en) | 1990-11-06 | 1990-11-06 | Effective cross section forming shield excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04174191A true JPH04174191A (en) | 1992-06-22 |
Family
ID=17887883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2300688A Pending JPH04174191A (en) | 1990-11-06 | 1990-11-06 | Effective cross section forming shield excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04174191A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0711883A (en) * | 1993-06-25 | 1995-01-13 | Kajima Corp | Shielding machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625596A (en) * | 1979-08-04 | 1981-03-11 | Hazama Gumi | Method of construction of covering tunnel |
| JPH02190600A (en) * | 1989-01-18 | 1990-07-26 | Shimizu Corp | Shield construction |
| JPH0237998B2 (en) * | 1982-09-24 | 1990-08-28 | Seikosha Kk |
-
1990
- 1990-11-06 JP JP2300688A patent/JPH04174191A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625596A (en) * | 1979-08-04 | 1981-03-11 | Hazama Gumi | Method of construction of covering tunnel |
| JPH0237998B2 (en) * | 1982-09-24 | 1990-08-28 | Seikosha Kk | |
| JPH02190600A (en) * | 1989-01-18 | 1990-07-26 | Shimizu Corp | Shield construction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0711883A (en) * | 1993-06-25 | 1995-01-13 | Kajima Corp | Shielding machine |
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