JPS6117700A - Embedded pipe propelling method - Google Patents
Embedded pipe propelling methodInfo
- Publication number
- JPS6117700A JPS6117700A JP13842785A JP13842785A JPS6117700A JP S6117700 A JPS6117700 A JP S6117700A JP 13842785 A JP13842785 A JP 13842785A JP 13842785 A JP13842785 A JP 13842785A JP S6117700 A JPS6117700 A JP S6117700A
- Authority
- JP
- Japan
- Prior art keywords
- buried pipe
- pipe
- cutting edge
- excavated
- earth
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
この発明は、埋設管の前部に刃口を有する先導管を取付
けて、地中を掘進する埋設管推進工法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a buried pipe propulsion method in which a leading pipe having a cutting edge is attached to the front part of the buried pipe and the pipe is dug underground.
埋設管を地中に施工する場合に、地表を開削せずに埋設
管前部に刃口を有する先導管を取付けて、地中に先導管
及び埋設管を圧入しながら推進する工法はすでに公知で
あり、これに用いられる装置としては、断面三角匣状の
刃口リングを先端に取付けた円筒形の先導管及び刃口開
口部に位置する掘削刃と掘削刃を回転させるスクリュー
コンベアとの組合せによるものがある。When constructing a buried pipe underground, a construction method is already known in which a leading pipe with a cutting edge is attached to the front part of the buried pipe without excavating the ground surface, and the leading pipe and the buried pipe are pushed into the ground while being press-fitted. The equipment used for this purpose is a combination of a cylindrical leading pipe with a triangular box-shaped cutter ring attached to its tip, an excavation blade located at the cutter opening, and a screw conveyor that rotates the excavation blade. There are some reasons.
かかる装置を用いて掘進する場合、特に崩壊性の地盤や
湧水のある地盤では、掘削刃の回転により土砂が喰み込
まれ、上位の土砂が下方に落下し、月日下面に敷き込′
まれで圧密され、その結果先導管及び埋設管は上方へと
曲がって進行してしまう恐れがある。When excavating with such a device, especially in collapsible ground or ground with spring water, the rotation of the excavation blade will dig in the earth and sand, and the upper earth and sand will fall downward and be laid on the lower surface.
Consolidation may occur, resulting in the lead pipe and buried pipe being bent upwards.
一方、先導管、埋設管の曲がり進行に対しては、先導管
先端の刃口を油圧シリンダー等で可動とし、刃口の向き
を変えて方向修正を行なうようにしているが、上記のご
とき上位土砂の落下は、先導管及び埋設管の上方に空洞
部分を作り出すものであり、刃口リングを下方に傾けて
も、この空洞部分のため方向修正を行なうに充分な反力
をとれず、方向修正は困難となる。On the other hand, in order to prevent bending of lead pipes and buried pipes, the cutting edge at the tip of the leading pipe is movable using a hydraulic cylinder, etc., and the direction is corrected by changing the direction of the cutting edge. Falling earth and sand creates a cavity above the lead pipe and buried pipe, and even if the cutting edge ring is tilted downward, due to this cavity, it will not be possible to generate enough reaction force to correct the direction, and the direction will change. Correction will be difficult.
この発明は上記不都合を解消することを目的とするもの
で、この目的は使用する埋設管推進装置の掘削部先端面
の上部を前へ張り出させて掘削部上方の土砂の崩壊を防
ぎつつ、埋設管の中心軸に対して、掘削面の中心軸を下
方にずらせて掘進を行なうことにより達成される。The purpose of this invention is to eliminate the above-mentioned disadvantages, and the purpose is to prevent the collapse of the earth and sand above the excavation part by protruding the upper part of the tip of the excavation part of the buried pipe propulsion device used. This is achieved by performing excavation by shifting the central axis of the excavated surface downward with respect to the central axis of the buried pipe.
次に、図面について実施例を詳細に説明する。Next, embodiments will be described in detail with reference to the drawings.
第1図は本発明工法で使用する埋設管推進装置の縦断側
面図で、埋設管1の前部先端に、先導管2を取付け、先
導管2の先端に断面三角匣状の刃口リング3を遊嵌し、
刃口リング3と先導管2間に油圧シリンダー4を介装し
て刃口リング3を上下及び左右に可動とする。FIG. 1 is a longitudinal side view of the buried pipe propulsion device used in the construction method of the present invention. A leading pipe 2 is attached to the front end of the buried pipe 1, and a cutting ring 3 having a triangular box-shaped cross section is attached to the leading end of the leading pipe 2. loosely fit,
A hydraulic cylinder 4 is interposed between the cutting edge ring 3 and the leading pipe 2, and the cutting edge ring 3 is movable vertically and horizontally.
先導管2及び埋設管1内にケーシング5を挿入し、ケー
シング5内にスクリューコンベア6を貫通させ、スクリ
ューコンベア6の先端にカンタ−ヘッド7を取付け、カ
ンタ−ヘッド7を刃口リング3の開口面に位置させ、刃
口リング3の先端上部にはフード8を取付ける。The casing 5 is inserted into the leading pipe 2 and the buried pipe 1, the screw conveyor 6 is passed through the casing 5, the canter head 7 is attached to the tip of the screw conveyor 6, and the canter head 7 is inserted into the opening of the blade ring 3. A hood 8 is attached to the top of the tip of the cutting edge ring 3.
第2図は、上記部品の相互位置関係を示すもので、カン
タ−ヘッド7とスクリューコンベア6の中心軸位置、及
びケーシング5の中心軸位置は、埋設管1の中心軸位置
よりも下方に置かれ、また刃口リング3は上方が下方よ
りも肉厚に形成したので、刃口3の土砂取込み面の中心
も埋設管1の中心よりも下方に位置している。FIG. 2 shows the mutual positional relationship of the above parts, and the central axis positions of the canterhead 7 and the screw conveyor 6, as well as the central axis position of the casing 5, are located below the central axis position of the buried pipe 1. Furthermore, since the upper part of the cutting edge ring 3 is made thicker than the lower part, the center of the earth and sand intake surface of the cutting edge 3 is also located below the center of the buried pipe 1.
なお、第1図において、9は、埋設管1の後方からトラ
ンシットで先導管2の水平状態を調べるためのターゲッ
トである。In FIG. 1, reference numeral 9 is a target for checking the horizontal state of the leading pipe 2 by transit from behind the buried pipe 1.
次に本発明の工法について説明すると、埋設管1の後方
に設置した駆動装置(図示せず)によりスクリューコン
ベア6及びカッターヘッド7を回転し、刃口リング3の
前面土砂を掘削して後方へ排出し、かつ同時に先導管2
及び埋設管1を別途設けた推進ジヤツキ等で押し進める
。Next, to explain the construction method of the present invention, a drive device (not shown) installed at the rear of the buried pipe 1 rotates the screw conveyor 6 and cutter head 7, excavates the earth and sand in front of the cutting edge ring 3, and moves it backward. discharge, and at the same time lead pipe 2
Then, push the buried pipe 1 forward using a propulsion jack or the like provided separately.
その際、刃口3及びカンタ−ヘッド7により定められる
掘削面の中心は埋設管1の中心軸よりも下方に位置しな
から掘進が行なわれ、その結果掘削面の上位土砂が下方
に崩壊しても、先導管2の後部及び埋設管1の上方には
至らず、空洞部が先導管2及び埋設管1の上面に生ずる
ことはない。At this time, the center of the excavated surface defined by the cutting edge 3 and the canter head 7 is located below the central axis of the buried pipe 1 before the excavation is performed, and as a result, the upper earth and sand on the excavated surface collapses downward. However, it does not reach the rear part of the leading pipe 2 and above the buried pipe 1, and no cavity is formed on the upper surface of the leading pipe 2 and the buried pipe 1.
よって、油圧シリンダー4を作動し、刃口リング3を下
方に向けて方向修正を行なう際、反力を十分とることが
できる。Therefore, when the hydraulic cylinder 4 is operated to correct the direction of the cutting edge ring 3 downward, a sufficient reaction force can be taken.
この際、刃口リング3の先端上部に設けたフード8によ
り、より土砂の崩壊を防止できるとともに、上部の接地
面積が大きくなるので方向修正のための反力が取りやす
い。At this time, the hood 8 provided at the upper part of the tip of the cutting edge ring 3 can further prevent the collapse of the earth and sand, and since the ground contact area of the upper part is increased, it is easier to absorb the reaction force for direction correction.
また、カッタ−ヘッド7自体が下方に位置しているので
、掘削時に崩壊落下した土砂を効率的に掘り起こすこと
も可能である。Moreover, since the cutter head 7 itself is located below, it is also possible to efficiently dig up the earth and sand that collapsed and fell during excavation.
なお、崩壊落下土砂が刃口リング3の下面に入り込んで
圧密されるのを防ぐには、刃口リング3の先端下部にジ
ェット水の噴出口を形成し、ジェット水で落下土砂を掘
削することも考えられる。In addition, in order to prevent the collapsing and falling earth and sand from entering the lower surface of the cutting edge ring 3 and being consolidated, a jet water spout is formed at the bottom of the tip of the cutting edge ring 3, and the falling earth and sand is excavated with the jet water. can also be considered.
以上述べたように、この発明の埋設管推進工法は、埋設
管の中心軸に対して掘削面の中心軸を下方にずらせて掘
進するようにし、しかも掘削部先端面の上部を前へ張り
出させたから、掘削部上方の土砂の崩壊を防止でき、か
りに崩壊しても上位地盤中に空洞部を作り出す恐れがな
(、その結果方向修正のための反力をとるのに支障を来
たす恐れのないものである。As described above, in the buried pipe propulsion method of the present invention, the central axis of the excavated surface is shifted downward with respect to the central axis of the buried pipe, and the upper part of the tip of the excavated part is extended forward. This prevents the earth and sand above the excavation from collapsing, and even if it collapses, there is no risk of creating a cavity in the upper ground (and as a result, there is no risk of creating a cavity in the upper ground that could interfere with taking up the reaction force for direction correction). It's something that doesn't exist.
また、埋設管内に挿入されるケーシングも埋設管の下部
に位置するので、埋設管の径が小さい場合でも埋設管と
ケーシング上部との間に充分な空間を取ることができ、
この空間を用いてトランシット等で水平変位の測定を行
なうことができるものである。In addition, since the casing inserted into the buried pipe is also located at the bottom of the buried pipe, there is sufficient space between the buried pipe and the upper part of the casing even if the diameter of the buried pipe is small.
This space can be used to measure horizontal displacement in a transit vehicle or the like.
第1図は、この発明で用いる埋設管推進装置を示す縦断
側面図、第2図は、各部品の相互位置関係を示す説明図
である。
1・・・埋設管 2・・・先導管3・・・刃口
リング 4・・・油圧シリンダー5・・・ケーシン
グ 6・・・スクリューコンベア7・・・カッター
ヘッド 8・・・フード9・・・ターゲットFIG. 1 is a vertical sectional side view showing a buried pipe propulsion device used in the present invention, and FIG. 2 is an explanatory diagram showing the mutual positional relationship of each component. 1... Buried pipe 2... Leading pipe 3... Blade ring 4... Hydraulic cylinder 5... Casing 6... Screw conveyor 7... Cutter head 8... Hood 9... ·target
Claims (1)
に排出しながら埋設管の推進を行なう工法において、使
用する埋設管推進装置の掘削部先端面の上部を前へ張り
出させて掘削部上方の土砂の崩壊を防ぎつつ、埋設管の
中心軸に対して、掘削面の中心軸を下方にずらせて掘進
を行なうことを特徴とする埋設管推進工法。In a construction method that mechanically excavates underground soil and propels a buried pipe while discharging the excavated soil backwards with an unloading device, the upper part of the tip of the excavated part of the buried pipe propulsion device used is extended forward. A buried pipe propulsion method characterized by performing excavation by shifting the central axis of the excavated surface downward with respect to the central axis of the buried pipe while preventing the collapse of earth and sand above the excavated part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13842785A JPS6117700A (en) | 1985-06-24 | 1985-06-24 | Embedded pipe propelling method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13842785A JPS6117700A (en) | 1985-06-24 | 1985-06-24 | Embedded pipe propelling method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6117700A true JPS6117700A (en) | 1986-01-25 |
Family
ID=15221711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13842785A Pending JPS6117700A (en) | 1985-06-24 | 1985-06-24 | Embedded pipe propelling method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6117700A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0258698A (en) * | 1988-08-24 | 1990-02-27 | Kurimoto Ltd | Driving/underground installation device for small diameter pipe |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5131017A (en) * | 1974-09-09 | 1976-03-16 | Mitsubishi Heavy Ind Ltd | CHICHUKANTAISUISHINMAISETSUSOCHI |
-
1985
- 1985-06-24 JP JP13842785A patent/JPS6117700A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5131017A (en) * | 1974-09-09 | 1976-03-16 | Mitsubishi Heavy Ind Ltd | CHICHUKANTAISUISHINMAISETSUSOCHI |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0258698A (en) * | 1988-08-24 | 1990-02-27 | Kurimoto Ltd | Driving/underground installation device for small diameter pipe |
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