JP3598470B2 - Propulsion method and tip conductor of propulsion pipe - Google Patents
Propulsion method and tip conductor of propulsion pipe Download PDFInfo
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- JP3598470B2 JP3598470B2 JP13521094A JP13521094A JP3598470B2 JP 3598470 B2 JP3598470 B2 JP 3598470B2 JP 13521094 A JP13521094 A JP 13521094A JP 13521094 A JP13521094 A JP 13521094A JP 3598470 B2 JP3598470 B2 JP 3598470B2
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Description
【0001】
【産業上の利用分野】
本発明は推進工法及び推進管の先導体に関するものである。
【0002】
【従来の技術】
推進工法は、図7に示すように、推進管aの先端に先導体bを取り付け、発進坑内で反力受に反力をとって、ジャッキ推力等によって推進管aを地中に圧入して管きょを布設する工法である。
複数の推進管aを隣接させて布設する場合は、図7、8に示すように、推進管a及び先導体bの周面の軸方向に雌継手c1と雄継手c2を設け、先行して圧入された推進管aの雌継手c1に、圧入しようとする推進管aの雄継手c2を連結させて、既設推進管aの雌継手c1をガイドとして後行推進管aの圧入が行われる。
【0003】
【発明が解決しようとする課題】
上記の従来技術には、次のような問題点が存在する。
<イ>推進管の継手部は管体周面より突出しているため、推進時に大きな土圧を受け、変形あるいは破損するおそれがある。
【0004】
<ロ>既設推進管に沿って後行推進管を圧入する際に、既設推進管の継手部と後行推進管の先導体の継手部との間に、玉石や礫が侵入して噛み込み、継手の変形あるいは破損の原因となる。
【0005】
<ハ>継手部の遊びにより、施工精度が低下する。
【0006】
【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、継手部の変形あるいは破損を防止し、かつ施工精度の向上を図ることができる推進工法及び推進管の先導体を提供することを目的とする。
【0007】
【課題を解決するための手段】
即ち、本発明は、推進管とその先端に装備した先導体との周面の軸方向に継手部を設け、既設推進管の継手部と圧入しようとする後行推進管及びその先導体の継手部を連結させて、既設推進管をガイドとして後行推進管の圧入を行う推進工法において、継手部内には弾力性を有する詰め物を詰め、既設推進管の継手部内の詰め物を、圧入しようとする後行推進管及びその先導体の継手部により圧縮しながら、継手部同士を連結させて推進管の圧入を行うと共に、先導体の前胴部周面に設けた先行カッタにより、地盤の継手部の圧入部分を先行して切削し、切削した土砂を、前記先行カッタの近傍に開設した土砂流入口より取り込みながら推進を行うことを特徴とした、推進工法及び推進管の先導体である。
【0008】
【実施例】
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。
<イ>先導体の構造
(1)全体の構造
先導体の全体構造は、図1に示すように、先導体の前胴部1と後胴部2、前胴部1の前面に装備される掘削用カッタ−ヘッド3、先導体内部の軸方向に配置される土砂搬出用オ−ガスクリュ−31よりなる。
なお、泥水搬送用モ−タ及び配管類を配備した流体圧送方式にも本発明を適応させることができる。
【0009】
(2)継手部
図1、2に示すように、先導体後胴部2の周面の軸方向に、等間隔をおいて2箇所に雌継手4を設ける。
図1、2は、最初に布設する基準推進管の先頭に装備する先導体であるため、両継手ともに雌継手4が装着されている。
雌継手4は、例えば図2に示すように、L字鋼を反転させて向かい合わせ、先導体の軸方向にスリットが形成されるよう装着する。
【0010】
(3)保護板
雌継手4の先端部及びその近傍の側部には、鋼板よりなる先端保護板5と側部保護板51を張り付ける。
これによって、推進中に雌継手4の先端部分より、玉石や礫が内部に侵入するのを防止することができる。
【0011】
(4)発泡スチロ−ル
雌継手4の内部空間には、図2に示すように、弾力性を有する詰め物6を詰める。
この詰め物6には、例えば発泡スチロ−ルや発泡ウレタン等を使用できる。
詰め物6を雌継手4内に詰めることによって、推進中に玉石や礫が雌継手4内に侵入するのを防止することができる。
後述の雄継手との連結時には、この詰め物6を雄継手の推進により圧縮しながら、雌雄の継手が連結されることになる。
【0012】
(5)先行カッタ
先行カッタ11は、図1、3に示すように、先導体の前胴部1の周面に、後胴部2の継手部の延長上に設けられており(従って図1、3では2箇所)、地盤の継手部の圧入部分を先行して切削するためのものである。
この先行カッタ11は、鋼板により後方の継手部と同じ断面形状に形成され、その先端面は内側に入り込むテ−パ−状に形成されている。
なお、先行カッタ11の先端面にはハ−ドフェ−シング加工を施すとよい。
【0013】
(6)土砂流入口
各先行カッタ11の直前の前胴部1の周面には、土砂流入口12が開設されている。
先行カッタ11により切削された土砂は、この土砂流入口12より内部に取り込まれ、オ−ガスクリュ−31によって坑外に搬出される。
【0014】
(7)切削ビット
先導体前胴部1の先端部に装備するカッタ−ヘッド3の周面には、切削ビット13を付設する。
この切削ビット13は、先行カッタ11で切削した土砂によって、カッタ−ヘッド3の周面が摩耗するため、その摩耗を防止するために取付けるものである。
【0015】
<ロ>基準推進管の圧入準備
図4に示すように、上記のように構成した先導体の後胴部2の尾端に、最初に埋設する基準推進管7aを連結する。
基準推進管7aの周面の軸方向には、先導体後胴部2に付設した雌継手4の延長上に、同形の雌継手41を付設する。
これらの雌継手41の先端部分にも、先端保護板5と側部保護板51を張り付け、また内部には発泡スチロ−ル等の詰め物6を詰める。
【0016】
<ハ>基準推進管の圧入
発進坑内に先導体を搬入し、その尾端に基準推進管7aを継ぎ足しながら、発進坑内で反力受に反力をとって、ジャッキ推力等によって圧入していく。
このとき、先導体前胴部1に設けた先行カッタ11により、地盤の継手部の圧入部分を先行して切削し、切削した土砂を土砂流入口12より取り込みながら推進が行われるため、オ−ガスクリュ−3の地盤内への圧入が容易に行われる。
また、先端保護板5と側部保護板51及び詰め物6によって、雌継手4内に玉石や礫が侵入するのを防止することができる。
【0017】
<ニ>後行推進管の圧入準備
図5に示すように、基準推進管7aと継手部を介して連結して付設される後行推進管7b、7c・・・は、雌継手41と、その対向する側に雌継手41内に嵌合する略T字状の雄継手8とを有している。
また、これらの後行推進管7b等の先端に装備される先導体後胴部2にも、図6に示すように、前述の雌継手4と、その対向する位置に略T字状の雄継手81を付設する。
この雄継手81の先端部分には、雌継手4と同様に先端保護板9と側部保護板91を張り付ける。
なお、雄継手81の延長上の先導体前胴部1の周面には、先行カッタ11及び土砂流入口12等を設ける必要はない。
【0018】
<ホ>後行推進管の圧入
図5に示すように、基準推進管7aの布設完了後、その雌継手41の尾端に、先導体後胴部2の雄継手81及び後行推進管7bの雄継手8を連結し、雄継手8により雌継手41内の詰め物6を圧縮しながら、基準推進管7aをガイドとして圧入を行う。
このとき、雌継手41と雄継手8間には詰め物6が介在するため、継手部の遊びが少なく、高精度な布設が可能となる。
後行推進管7bの布設が終了したら、後行推進管7c以下、上記の手順を繰り返して所定数の推進管を布設し、管きょの施工を完了させる。
【0019】
【本発明の効果】
本発明は以上説明したようになるため、次のような効果を得ることができる。
<イ>地盤の継手の圧入部分を、カッタにより先行して切削し、土砂流入口より切削土砂を取り込むため、継手部の圧入抵抗が減少し、継手部の変形や破損を防止することができる。
【0020】
<ロ>継手部の先端部分には保護板を取り付け、雌継手内には詰め物を詰めるため、継手部内への玉石や礫あるいは裏込材の侵入を防止できる。
従って、玉石や礫の噛み込みによる、継手の変形あるいは破損を防止できる。
【0021】
<ハ>雌継手内に詰めた詰め物により、継手部の遊びが制限されるため、推進管の打設精度が向上する。
【図面の簡単な説明】
【図1】先導体の説明図
【図2】図1の III−III 断面図
【図3】図1のII−II断面図
【図4】推進方法の説明図
【図5】推進管の連結付設状態の説明図
【図6】後行先導体の説明図
【図7】従来技術の説明図
【図8】従来技術の説明図[0001]
[Industrial applications]
The present invention relates to a propulsion method and a conductor for a propulsion pipe.
[0002]
[Prior art]
In the propulsion method, as shown in FIG. 7, a leading conductor b is attached to the tip of a propulsion tube a, a reaction force is received in a reaction force receiver in a starting pit, and the propulsion tube a is pressed into the ground by jack thrust or the like. This is a method of laying pipes.
When laying a plurality of propulsion tubes a adjacent to each other, as shown in FIGS. 7 and 8, a female joint c1 and a male joint c2 are provided in the axial direction of the peripheral surfaces of the propulsion tubes a and the leading conductor b, and The male joint c2 of the propulsion pipe a to be press-fitted is connected to the female joint c1 of the press-fitted propulsion pipe a, and the subsequent propulsion pipe a is press-fitted using the female joint c1 of the existing propulsion pipe a as a guide.
[0003]
[Problems to be solved by the invention]
The above prior art has the following problems.
<A> Since the joint portion of the propulsion pipe protrudes from the peripheral surface of the pipe body, it receives a large earth pressure during propulsion and may be deformed or damaged.
[0004]
<B> Cobbles and gravel enter and bite between the joint of the existing propulsion pipe and the joint of the leading conductor of the following propulsion pipe when press-fitting the following propulsion pipe along the existing propulsion pipe. This may cause deformation or breakage of the joint.
[0005]
<C> Construction accuracy is reduced due to play of the joint portion.
[0006]
[Object of the present invention]
The present invention has been made in order to solve the above problems, and provides a propulsion method and a propulsion pipe tip conductor capable of preventing deformation or breakage of a joint portion and improving construction accuracy. The purpose is to do.
[0007]
[Means for Solving the Problems]
That is, the present invention provides a joint portion in the axial direction of the peripheral surface of the propulsion tube and the leading conductor provided at the tip thereof, and a joint between the propulsion tube and the leading conductor which is to be press-fitted with the joint portion of the existing propulsion tube. In the propulsion method of connecting the parts and press-fitting the following propulsion pipe using the existing propulsion pipe as a guide, the joint part is filled with elastic filling, and the filling in the joint part of the existing propulsion pipe is to be press-fitted. While compressing the joints of the trailing propulsion pipe and its leading conductor, the joints are connected to each other to press-fit the propulsion pipe, and the leading cutter provided on the peripheral surface of the front trunk of the leading conductor is used to join the ground. A cutting method and a leading conductor of a propulsion pipe, characterized in that the press-fitting portion is cut in advance, and the cut is carried out while taking in the cut earth and sand from an earth and sand inlet opened near the preceding cutter.
[0008]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
<A> Structure of Lead Conductor (1) Overall Structure The whole structure of the lead conductor is mounted on the
The present invention can also be applied to a fluid pressure feeding system provided with a mud transport motor and piping.
[0009]
(2) Joint part As shown in FIGS. 1 and 2, two female joints 4 are provided at equal intervals in the axial direction of the peripheral surface of the
FIGS. 1 and 2 show a leading conductor provided at the head of a reference propulsion pipe to be laid first, so that a female joint 4 is attached to both joints.
For example, as shown in FIG. 2, the female joint 4 is attached so that the L-shaped steel is turned upside down and faced to form a slit in the axial direction of the leading conductor.
[0010]
(3) The distal
Thus, it is possible to prevent cobblestones and gravel from entering the inside from the tip portion of the female joint 4 during propulsion.
[0011]
(4) As shown in FIG. 2, a filling 6 having elasticity is packed in the internal space of the styrofoam female joint 4.
As the
By packing the
At the time of connection with a male joint described later, the male and female joints are connected while compressing the
[0012]
(5) Leading cutter As shown in FIGS. 1 and 3, the leading
The leading
The front end surface of the leading
[0013]
(6) Sediment flow inlet A
The earth and sand cut by the preceding
[0014]
(7) Cutting Bit A
The
[0015]
<B> Preparation for press-fitting the reference propulsion pipe As shown in FIG. 4, the reference propulsion pipe 7a to be first buried is connected to the tail end of the
In the axial direction of the peripheral surface of the reference propulsion pipe 7a, a
A
[0016]
<C> The leading conductor is carried into the starting pit of the reference propulsion pipe, and while adding the reference propulsion pipe 7a to the tail end, the reaction force is received in the starting pit to receive the reaction force, and the jack is pressed in by the jack thrust or the like. .
At this time, the leading
In addition, the
[0017]
<D> Preparation for press-fitting of trailing propulsion pipe As shown in FIG. 5, the trailing
Also, as shown in FIG. 6, the female joint 4 and the substantially T-shaped male joint at the position opposite to the female joint 4 are also provided at the leading end of the leading
The distal end protection plate 9 and the side protection plate 91 are attached to the distal end portion of the male joint 81 in the same manner as the female joint 4.
It is not necessary to provide the leading
[0018]
<E> Press-fitting of the trailing propulsion pipe As shown in FIG. 5, after the installation of the reference propulsion pipe 7a is completed, the male joint 81 of the leading conductor
At this time, since the
When the laying of the trailing propulsion pipe 7b is completed, the above procedure is repeated from the trailing
[0019]
[Effects of the present invention]
Since the present invention has been described above, the following effects can be obtained.
<B> Since the press-fitted part of the ground joint is cut in advance by a cutter and the cut sand is taken in from the sediment inflow port, the press-fit resistance of the joint is reduced, and deformation and breakage of the joint can be prevented. .
[0020]
<B> A protection plate is attached to the tip of the joint, and padding is packed in the female joint, so that cobblestone, gravel, or backing material can be prevented from entering the joint.
Therefore, it is possible to prevent the joint from being deformed or damaged due to biting of cobblestones or gravel.
[0021]
<C> Since the play of the joint portion is limited by the filling in the female joint, the driving accuracy of the propulsion pipe is improved.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a leading conductor. FIG. 2 is a sectional view taken along line III-III of FIG. 1. FIG. 3 is a sectional view taken along line II-II of FIG. 1. FIG. 4 is an explanatory view of a propulsion method. FIG. 6 is an explanatory view of an attached state. FIG. 6 is an explanatory view of a subsequent conductor. FIG. 7 is an explanatory view of a prior art.
Claims (12)
前記先導体の前胴部周面に設けた、先端面が後方向に向けて内側に入り込んだテーパー状の先行カッタにより、地盤の継手部の圧入部分を先行して切削し、
切削した土砂を、前記先行カッタの近傍に開設した土砂流入口より内部に取り込んで、取り込み直後からオーガスクリューによって搬出しつつ推進を行うことを特徴とした、
推進工法。A joint is provided in the axial direction of the peripheral surface of the propulsion pipe and the leading conductor provided at the tip thereof, and the joint of the existing propulsion pipe and the trailing propulsion pipe to be press-fitted and the joint of the leading conductor are engaged. , In the propulsion method to press-fit the following propulsion pipe using the existing propulsion pipe as a guide,
Provided on the peripheral surface of the front trunk portion of the leading conductor, the leading end surface is cut in advance by press-fitting the joint portion of the ground by a tapered leading cutter that has entered inside toward the rear .
Cutting the soil, Nde Captures inside from sediment inlet opened in the vicinity of the leading cutter was characterized by performing the propulsion while out by auger screw immediately after capture,
Propulsion method.
継手部内には弾力性を有する詰め物を詰め、
既設推進管の継手部内の詰め物を、圧入しようとする後行推進管及びその先導体の継手部により圧縮しながら、継手部同士を連結させて推進管の圧入を行うと共に、
先導体の前胴部周面に設けた先行カッタにより、地盤の継手部の圧入部分を先行して切削し、
切削した土砂を、前記先行カッタの近傍に開設した土砂流入口より取り込みながら推進を行うことを特徴とした、
推進工法。The joint portion is provided propulsion tube and the axial direction of the peripheral surface of the leading body equipped at its distal end, by engaging the fitting portions of the row propulsion tube and its leading body after to be press-fit the joint portion of the existing propulsion tube , In the propulsion method to press-fit the following propulsion pipe using the existing propulsion pipe as a guide,
Fill the joint with elastic fillings,
While compressing the filling in the joint part of the existing propulsion pipe by the joint part of the trailing propulsion pipe to be press-fitted and its leading conductor, while connecting the joint parts and press-fitting the propulsion pipe,
By the leading cutter provided on the front body peripheral surface of the leading conductor, the press-fitting part of the joint part of the ground is cut in advance,
Characterized in that propulsion is performed while taking in the cut earth and sand from the sediment inflow opening established in the vicinity of the preceding cutter.
Propulsion method.
前記詰め物に発泡スチロールを使用することを特徴とした、
推進工法。In the propulsion method according to claim 2,
Using styrofoam for the filling,
Propulsion method.
前記詰め物に発泡ウレタンを使用することを特徴とした、
推進工法。In the propulsion method according to claim 2,
Characterized by using urethane foam for the filling,
Propulsion method.
前記継手部の先端部分に、前記先行カッタで切削した溝内にある玉石や礫の侵入を防止する保護板を装着したことを特徴とする、
推進工法。In the propulsion method according to any one of claims 1 to 4,
At the tip of the joint portion, a protection plate for preventing intrusion of boulders and gravel in the groove cut by the preceding cutter is attached,
Propulsion method.
前記先導体の先端部に装備する掘削回転部の周面に、前記先行カッタによって先導体の側壁へ向けて圧密された圧密土砂の切削ビットを付設したことを特徴とする、
推進工法。In the propulsion method according to any one of claims 1 to 5,
A cutting bit of compacted earth and sand compacted toward the side wall of the leading conductor by the leading cutter is provided on the peripheral surface of the excavation rotating part provided at the tip of the leading conductor,
Propulsion method.
先導体の前胴部周面に設けた、地盤の継手部の圧入部分を先行して切削する、先端面が後方向に向けて内側に入り込んだテーパー状の先行カッタと、
この先行カッタの近傍に開設した、切削した土砂を取り込む土砂流入口とを有しており、
前記土砂流入口より内部に取り込んだ土砂を、取り込み直後からオーガスクリューによって搬出を行うことを特徴とした、
推進管の先導体。A joint is provided in the axial direction of the peripheral surface of the propulsion pipe and the leading conductor provided at the tip thereof, and the joint of the existing propulsion pipe and the trailing propulsion pipe to be press-fitted and the joint of the leading conductor are engaged. , Using the existing propulsion pipe as a guide for the propulsion method for press-fitting the following propulsion pipe,
Provided before the barrel portion peripheral surface of the leading body, cutting prior to press-fitting portions of the joint portion of the ground, and tapered leading cutter tip surface has entered the inside toward the rear direction,
Opened in the vicinity of the leading cutter, and possess the sediment inlet incorporate cutting earth and sand,
The earth and sand taken in from the earth and sand inflow port was characterized by being carried out by an auger screw immediately after being taken in,
Propulsion tube tip conductor.
前記先導体の先端部に装備する掘削回転部の周面に、前記先行カッタによって先導体の側壁へ向けて圧密された圧密土砂の切削ビットを付設したことを特徴とする、
推進管の先導体。The propulsion tube tip conductor according to claim 7,
A cutting bit of compacted earth and sand compacted toward the side wall of the leading conductor by the leading cutter is provided on the peripheral surface of the excavation rotating part provided at the tip of the leading conductor,
Propulsion tube tip conductor.
前記継手部の先端部分に、前記先行カッタで切削した溝内にある玉石や礫の侵入を防止する保護板を装着したことを特徴とする、
推進管の先導体。In the tip conductor of the propulsion pipe according to claim 7 or 8,
At the tip of the joint portion, a protection plate for preventing intrusion of boulders and gravel in the groove cut by the preceding cutter is attached,
Propulsion tube tip conductor.
前記継手部の内部空間に、弾力性を有する詰め物を詰めたことを特徴とする、
推進管の先導体。The tip conductor of the propulsion pipe according to any one of claims 7 to 9,
Characterized in that the interior space of the joint portion is filled with elastic filling.
Propulsion tube tip conductor.
前記詰め物に発泡スチロールを使用することを特徴とした、
推進管の先導体。The tip conductor of the propulsion pipe according to claim 10,
Using styrofoam for the filling,
Propulsion tube tip conductor.
前記詰め物に発泡ウレタンを使用することを特徴とした、
推進管の先導体。The tip conductor of the propulsion pipe according to claim 10,
Characterized by using urethane foam for the filling,
Propulsion tube tip conductor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13521094A JP3598470B2 (en) | 1994-05-25 | 1994-05-25 | Propulsion method and tip conductor of propulsion pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13521094A JP3598470B2 (en) | 1994-05-25 | 1994-05-25 | Propulsion method and tip conductor of propulsion pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07317492A JPH07317492A (en) | 1995-12-05 |
JP3598470B2 true JP3598470B2 (en) | 2004-12-08 |
Family
ID=15146428
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Application Number | Title | Priority Date | Filing Date |
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JP13521094A Expired - Fee Related JP3598470B2 (en) | 1994-05-25 | 1994-05-25 | Propulsion method and tip conductor of propulsion pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3598470B2 (en) |
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1994
- 1994-05-25 JP JP13521094A patent/JP3598470B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07317492A (en) | 1995-12-05 |
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