JPH02256795A - Driving method - Google Patents
Driving methodInfo
- Publication number
- JPH02256795A JPH02256795A JP7910689A JP7910689A JPH02256795A JP H02256795 A JPH02256795 A JP H02256795A JP 7910689 A JP7910689 A JP 7910689A JP 7910689 A JP7910689 A JP 7910689A JP H02256795 A JPH02256795 A JP H02256795A
- Authority
- JP
- Japan
- Prior art keywords
- propulsion
- driving
- soil
- bending angle
- head
- 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
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000002689 soil Substances 0.000 claims description 27
- 239000003380 propellant Substances 0.000 claims description 13
- 238000005452 bending Methods 0.000 abstract description 21
- 238000009412 basement excavation Methods 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、推進体の複数個が屈曲自在に連結され、且つ
、それらの推進体の先端のものには推進体長手方向に対
して傾斜した受圧面が形成されている推進装置を、土中
に推進させていく推進工法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that a plurality of propellants are connected in a bendable manner, and the tips of the propellants are inclined with respect to the longitudinal direction of the propellants. This invention relates to a propulsion method in which a propulsion device on which a pressure-receiving surface is formed is propelled into the soil.
推進装置を円弧状経路に沿って旋回させながら推進させ
ていく場合は、受圧面の方向を旋回方向に圧力を受ける
ように設定し、そのままの状態で推進体を押し込んでい
き、土圧によって先端の方向を徐々に変えて、土中にお
いて受圧面の向きとは反対の方向に円弧状経路に沿うよ
うにして推進させていくのが一般的である。When propelling the propulsion device while turning along an arcuate path, set the direction of the pressure-receiving surface so that it receives pressure in the turning direction, push the propeller in that state, and the tip will be pushed by the earth pressure. It is common to gradually change the direction of the pressure-receiving surface and propel it along an arcuate path in the direction opposite to the direction of the pressure-receiving surface.
個々の推進体の長さは短い方が円弧状経路に沿って円滑
に旋回させながら推進させることができるため、従来の
推進装置では、個々の推進体の長さを最小半径の円弧状
経路に合うように多少短めにしである。If the length of each propellant is short, it can be propelled while turning smoothly along an arcuate path, so in conventional propulsion devices, the length of each propellant is adjusted to an arcuate path with the minimum radius. It is slightly shorter to fit.
しかしながら、土質が軟らかい場合には推進体の保持力
が弱いため、旋回している最中に先端が障害物などに当
たって推進し難くなると、推進体の途中の連結部分で座
屈が起こって、後方からの押し込み力が確実に伝わらな
くなり、所定の円弧状経路から逸脱して推進してしまう
難点がある。However, if the soil is soft, the holding force of the propelling body is weak, so if the tip hits an obstacle while turning and it becomes difficult to propel, buckling occurs at the connecting part in the middle of the propelling body, causing it to move backward. The problem is that the pushing force from the engine is not transmitted reliably, and the engine deviates from the predetermined arcuate path and is propelled.
本発明では、土質が軟らかい場所であっても、所望の円
弧状経路に沿って正確に推進させることが可能な推進工
法を提供することを目的としている。An object of the present invention is to provide a propulsion method that enables accurate propulsion along a desired arcuate path even in places where the soil is soft.
上記の目的を達成するために本発明に係る推進工法にあ
っては、前記推進体の長さを、土質が硬い場合よりも軟
らかい場合において長くして、前記推進装置を推進させ
ていく点を特徴としている。In order to achieve the above object, the propulsion method according to the present invention has the advantage that the length of the propulsion body is made longer when the soil is soft than when the soil is hard to propel the propulsion device. It is a feature.
推進装置を円弧状経路に沿って旋回させながら推進させ
ていく際に、土質が軟らかくて推進体の保持力が弱い場
合には、土質が硬い場合よりも推進体を長くして推進装
置を推進させていくのである。こうして推進体が長くな
ると、それぞれの屈曲部間における土との接触面積が増
大するため、後方からの押し込みに伴い、後続の推進体
から先行する推進体の後端部へ所定の経路から逸脱する
方向に力が加わっても、太きな保持力を発揮して座屈す
るのを防止することができるのである。When the propulsion device is propelled while turning along an arcuate path, if the soil is soft and the holding force of the propellant is weak, the propulsion device is made longer to propel the propulsion device than if the soil is hard. We will let them do so. As the propellant becomes longer in this way, the contact area with the soil between each bend increases, so as it is pushed from behind, it deviates from the predetermined path from the succeeding propellant to the rear end of the preceding propellant. Even if force is applied in any direction, it can exert a large holding force and prevent buckling.
本発明により、土質が硬い場所のみならず軟らかい場所
であっても、所望の円弧状経路に沿っ・て推進装置を正
確に推進させることが可能になった。According to the present invention, it has become possible to accurately propel the propulsion device along a desired arcuate path not only in places where the soil is hard but also in places where the soil is soft.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第２図乃至第６図に示すように、外面が円筒面状の推進
体としての推進用ヘッド（１）や複数の推進管（２）を
継手部（Ｊ）を介して屈曲自在に連結し、以て２つの縦
穴間の土中を屈曲しながら推進していくことが可能推進
工法用の推進装置を構成しである。As shown in FIGS. 2 to 6, a propulsion head (1) as a propulsion body with a cylindrical outer surface and a plurality of propulsion tubes (2) are bendably connected via a joint (J). This constitutes a propulsion device for a propulsion method that can be propelled while bending through the soil between two vertical holes.
第１図に示すように、推進用ヘッド（１）は、管状の推
進用ヘッド本体（ＩＡ）、推進用ヘッド本体（ＩＡ）に
対してその長手方向に沿う軸芯（Ｐ）周りで回動自在な
掘削部（３）、及び掘削部（３）を回転操作する操作装
置（４）から成る。As shown in Fig. 1, the propulsion head (1) rotates around an axis (P) along the longitudinal direction of the tubular propulsion head body (IA) and the propulsion head body (IA). It consists of a flexible excavation part (3) and an operating device (4) for rotating the excavation part (3).
前記掘削部（３）には、推進管（２）を地中推進させる
に伴って土圧を受けて、その上圧を受けた方向に推進用
ヘッド（１）の推進方向を向けるための受圧面（Ｆ）を
、長手方向と交差する傾斜面に形成し、更に、水を噴射
して旋回推進方向側の土質を軟弱化させて旋回推進性を
向上させるための水噴射ノズル（５）を設けである。尚
、図示はしないが、例えば前記掘削部（３）の内部には
重錘式のセンサを内蔵してあり、土中においても受圧面
（Ｆ）が上下左右いかなる方向に向いているかを検出で
きるようになっている。この検出情報は、受圧面（Ｆ）
の向きを変更操作に使用される。The excavation part (3) receives the earth pressure as the propulsion pipe (2) is propelled underground, and has a pressure-receiving pressure for directing the propulsion head (1) in the direction in which the upper pressure is received. The surface (F) is formed as an inclined surface intersecting the longitudinal direction, and a water injection nozzle (5) is further provided for injecting water to soften the soil on the side in the direction of propulsion of the turn and improve propulsion of the turn. It is a provision. Although not shown, for example, the excavation part (3) has a built-in weight type sensor, which can detect whether the pressure receiving surface (F) is facing up, down, left, or right even in the soil. It looks like this. This detection information is the pressure receiving surface (F)
Used for operations that change the orientation of.
前記操作装置（４）は、推進用ヘッド本体（ＩＡ）に内
嵌され、且つ、キー（６）によって回動を規制されて往
復動する筒状の油圧ピストン（７）と、掘削部（３）の
後部に相対回転不能に連結され、且つ、油圧ピストン（
７）が外嵌螺合する螺合溝を備えている回転軸（８）と
、圧油を吸排して油圧ピストン（７）を往復移動させる
一対の圧油供給部（９Ａ）、 （９Ｂ）とを有している
。前記回転軸（８）の内部には、水噴射ノズル（５）に
水を供給するための配管（１０）を通してあり、この配
管（１０）は、圧油供給部（９Ａ）、 （９Ｂ）に接続
されている２本の油圧配管（ＩＩＡ）、 （ＩＩＢ）と
共に前記継手部（Ｊ）を通して後方の推進管（２）へ導
いである。The operating device (4) includes a cylindrical hydraulic piston (7) that is fitted into the propulsion head main body (IA) and that reciprocates while its rotation is restricted by a key (6), and an excavating portion (3). ) is connected to the rear part of the hydraulic piston (
7) is provided with a threaded groove into which it is externally fitted, and a pair of pressure oil supply parts (9A) and (9B) that suck and discharge pressure oil and reciprocate the hydraulic piston (7). It has A pipe (10) for supplying water to the water injection nozzle (5) is passed through the interior of the rotating shaft (8), and this pipe (10) is connected to the pressure oil supply parts (9A) and (9B). It is led to the rear propulsion pipe (2) through the joint part (J) together with the two connected hydraulic pipes (IIA) and (IIB).
かかる構造により、一方の圧油供給部（９Ａ又は９Ｂ）
から推進用ヘッド本体（ＩＡ）へ圧油を供給し、他方の
圧油供給部（９Ｂ又は９Ａ）へ推進用ヘッド本体（ＩＡ
）から圧油を戻すと、油圧ピストン（７）が往復移動す
るとともに、この油圧ピストン（７）に螺合している回
転軸（８）が正逆に回転し、掘削部（３）が軸芯（Ｐ）
周りに回転駆動されるようになっている。掘削部（３）
は、油圧ピストン（７）が−往復する間に少なくとも３
６０度以上回転するようになっている。With this structure, one pressure oil supply section (9A or 9B)
Pressure oil is supplied from the propulsion head body (IA) to the propulsion head body (IA) to the other pressure oil supply part (9B or 9A).
), the hydraulic piston (7) moves back and forth, and the rotary shaft (8) screwed into this hydraulic piston (7) rotates in forward and reverse directions, causing the excavation part (3) to move around the shaft. Core (P)
It is designed to be rotated by the surroundings. Excavation department (3)
is at least 3 times during the reciprocation of the hydraulic piston (7)
It is designed to rotate more than 60 degrees.
ところで詳しくは説明しないが、掘削部（３）を硬質の
土壌で回転する際に推進用ヘッド本体（ＩＡ）が反力に
よって逆方向に回転しようとする。By the way, although not explained in detail, when the excavation part (3) is rotated in hard soil, the propulsion head main body (IA) tends to rotate in the opposite direction due to reaction force.
これを防止するためには、推進用ヘッド本体（ＩＡ）の
外周面に突条を設けたり、或いは、推進用ヘッド（１）
に繋がる２本の油圧配管（ＩＩＡ）。In order to prevent this, it is necessary to provide a protrusion on the outer circumferential surface of the propulsion head main body (IA), or to
Two hydraulic pipes (IIA) connected to.
（ＩＩＢ）を強固なものにすることによって、推進用ヘ
ッド本体（ＩＡ）の回り止めを図るとよい。It is preferable to prevent the propulsion head body (IA) from rotating by making (IIB) strong.
次に、推進用ヘッド（１）と推進管（２）とを連結する
継手部（Ｊ）と、推進用ヘッド（１）と推進管（２）と
の最大屈曲角度を変更調節する角度調節手段（Ｓ）の構
造について説明する。尚、他の推進管（２）同士を連結
している継手部（Ｊ）やその部分の角度調節手段（Ｓ）
も同一構造になっているので、その説明については割愛
する。Next, a joint part (J) that connects the propulsion head (1) and the propulsion tube (2), and an angle adjustment means that changes and adjusts the maximum bending angle of the propulsion head (1) and the propulsion tube (2). The structure of (S) will be explained. In addition, the joint part (J) that connects other propulsion pipes (2) and the angle adjustment means (S) of that part
Since they have the same structure, we will omit their explanation.
前記継手部（Ｊ）では、前記推進管（２）の前端部を小
径に形成し、この小径部（２ａ）に球状部材（１２）を
外嵌固定しである。そして球状部材（１２）を、推進用
ヘッド（１）に内装された受部（１３）に内嵌してあり
、前記受部（１３）が球状部材（１２）の外周面を摺動
することによって、推進用ヘッド（１）が、その後端部
と推進管（２）の前端部とが接触しない範囲において、
上下左右いずれの方向へも屈曲でき球継手構造になって
いる。In the joint portion (J), the front end portion of the propulsion tube (2) is formed to have a small diameter, and a spherical member (12) is externally fitted and fixed to this small diameter portion (2a). The spherical member (12) is fitted into a receiving part (13) built into the propulsion head (1), and the receiving part (13) slides on the outer peripheral surface of the spherical member (12). Accordingly, within the range where the rear end of the propulsion head (1) does not come into contact with the front end of the propulsion tube (2),
It has a ball joint structure that allows it to be bent in any direction, up, down, left, or right.
また、前記角度調節手段（Ｓ）では、前記推進用ヘッド
（１）の後端部には小径の段部を形成し、この段部にネ
ジ（１４）を形成しである。そしてこのネジ（１４）に
、推進用ヘッド（１）の２個のロックナツト（１５Ａ）
、 （１５Ｂ）を螺合してあり、２個のロックナツト（
１５Ａ）、 （１５Ｂ）を位置調節することで継手部（
Ｊ）の最大屈曲角を設定できる構造になっている。これ
らのロックナツト（１５Ａ）、 （１５Ｂ）を前方に移
動させて固定すれば、推進用ヘッド（１）と推進管（２
）との隙間が大きくなり、推進用ヘッド（１）の最大屈
曲角が大きく設定される。Further, in the angle adjusting means (S), a small-diameter stepped portion is formed at the rear end of the propulsion head (1), and a screw (14) is formed in this stepped portion. Then, attach the two lock nuts (15A) of the propulsion head (1) to this screw (14).
, (15B) are screwed together, and two lock nuts (
By adjusting the positions of 15A) and (15B), the joint part (
The structure allows the maximum bending angle of J) to be set. If these lock nuts (15A) and (15B) are moved forward and fixed, the propulsion head (1) and propulsion tube (2)
) becomes larger, and the maximum bending angle of the propulsion head (1) is set larger.
逆に後方に移動して固定すれば、推進用ヘッド（１）と
推進管（２）との隙間が小さくなり、推進用ヘッド（１
）の最大屈曲角が小さく （最小角度は０度）設定され
ることになる。Conversely, if the propulsion head (1) and the propulsion tube (2) are moved backward and fixed, the gap between the propulsion head (1) and the propulsion tube (2) becomes smaller, and the propulsion head (1)
) will be set to a small maximum bending angle (minimum angle is 0 degrees).
次に、上述した構造の推進装置を硬い土質の場所で用い
る場合の基本的な推進工法について説明する。Next, a basic propulsion method when using the propulsion device having the above-described structure in a place with hard soil will be explained.
前記推進装置を直進させる場合は、各継手部（Ｊ）のロ
ックナツト（１５Ａ）、（１５Ｂ）を最後部に移動して
固定することで最大屈曲角を０度に予め設定しておく。When the propulsion device is to move straight, the maximum bending angle is preset to 0 degrees by moving and fixing the lock nuts (15A) and (15B) of each joint (J) to the rearmost position.
つまりは継手部（Ｊ）が曲がらないようにする。そして
推進用ヘッド本体（ＩＡ）に対して掘削部（３）を回転
させながら推進管（２）を押し込むこんでいく （第２
図参照）。In other words, the joint part (J) should not be bent. Then, push the propulsion tube (2) into the propulsion head main body (IA) while rotating the excavation part (3) (second
(see figure).
また、推進装置を所定の半径を有する円弧状経路に沿っ
て旋回させる場合には、各継手部（Ｊ）を最大屈曲角で
屈曲させた状態にした際に、前記推進管（２）が所定の
円弧状経路に沿うように各継手部（Ｊ）のロックナツト
（１５Ａ）、 （１５Ｂ）を調節して最大屈曲角を予め
設定しておく。そして受圧面（Ｆ）の向きを旋回させる
べき側へ土圧を受けるように位置させて推進管（２）を
押し込んでいく。このようにすると、水噴射ノズル（５
）によって旋回方向側の土質が軟弱化され、土から受け
る抵抗が小さくなっていることと、受圧面（Ｆ）が旋回
方向側への土庄を受けていることとが相まって、推進用
ヘッド（１）は徐々にその向きを変更していき、その後
部に連結された推進管（２）も屈曲しながらそれに追随
していく。In addition, when the propulsion device is turned along an arcuate path having a predetermined radius, when each joint (J) is bent at the maximum bending angle, the propulsion tube (2) The maximum bending angle is set in advance by adjusting the lock nuts (15A) and (15B) of each joint (J) so as to follow the arcuate path. Then, the propulsion tube (2) is pushed in with the pressure receiving surface (F) positioned so as to receive earth pressure toward the side to be turned. In this way, the water injection nozzle (5
), the soil on the turning direction side is softened and the resistance received from the soil is reduced, and the pressure receiving surface (F) receives the soil in the turning direction side. ) will gradually change its direction, and the propulsion tube (2) connected to its rear will follow suit while bending.
そして各継手部（Ｊ）の屈曲角が最大屈曲角に達すると
、それ以上屈曲できなくなった推進用ヘッド（１）や推
進管（２）はその屈曲状態を維持しながら、予め設定し
ておいた所定の円弧状経路に沿って推進していくように
なる（第３図参照）。When the bending angle of each joint (J) reaches the maximum bending angle, the propulsion head (1) and the propulsion tube (2), which cannot be bent any further, maintain their bent state and set in advance. The robot will now be propelled along a predetermined arc-shaped path (see Figure 3).
更に、推進装置を始めに直線的に推進させていき、所定
に位置まで達したら旋回させながら推進させていく場合
には、先端側に位置する推進用ヘッド（１）や推進管（
２）を最大屈曲角で屈曲させた状態にした際に、推進用
ヘッド（１）と推進管（２）とが所定の円弧状又は楕円
弧状の経路に相当する円弧に沿うように、先端側に位置
する継手部（Ｊ）のロックナツト（１５Ａ）、 （１５
Ｂ）を調節して最大屈曲角を予め設定しておく。また、
後端側に位置する継手部（Ｊ）の最大屈曲角を各継手部
（Ｊ）のロックナツト（１５Ａ）、 （１５Ｂ）を最後
方に移動させて固定することで最大屈曲角を０度に予め
設定しておく。そして始めは、掘削部（３）を回転させ
ながら推進用ヘッド本体（ＬＡ）を先頭に推進管（２）
を押し込んでいき、推進装置を直進的に推進させる。そ
して所定の位置まで達したら受圧面（Ｆ）の向きを旋回
方向に圧力を受ける方向で固定し、推進管（２）を引き
続き押し込んでいくのである。このようにして押し込ん
でいくと、所定の位置から先では、推進用ヘッド（１）
は受圧面（Ｆ）が土圧を受けることで徐々に向きを変更
し、その後部に連結された推進管（２）も所定の位置に
達することで最大屈曲角で屈曲しながらそれに追随し、
所定の円弧状経路に沿って推進していく。そして後端側
の推進管（２）では先に形成された直進経路に沿って、
座屈することなく所定の位置に達するまで直進的に推進
していくようになる（第４図参照）。Furthermore, when the propulsion device is initially propelled linearly and then rotated when it reaches a predetermined position, the propulsion head (1) and the propulsion tube (
2) is bent at the maximum bending angle, so that the propulsion head (1) and the propulsion tube (2) follow an arc corresponding to a predetermined arc-shaped or elliptical arc-shaped path. The lock nut (15A) of the joint (J) located at (15
B) to preset the maximum bending angle. Also,
The maximum bending angle of the joint part (J) located on the rear end side can be set to 0 degrees by moving the lock nuts (15A) and (15B) of each joint part (J) to the rearmost position and fixing it. Set it. At first, while rotating the excavation part (3), the propulsion head body (LA) is placed at the top and the propulsion pipe (2)
Push in to propel the propulsion device straight forward. Once a predetermined position is reached, the direction of the pressure receiving surface (F) is fixed in the direction in which pressure is received in the rotation direction, and the propulsion tube (2) is continued to be pushed in. As you push it in in this way, the propulsion head (1) will move beyond the specified position.
The pressure-receiving surface (F) gradually changes direction as it receives earth pressure, and the propulsion tube (2) connected to the rear of it also bends at the maximum bending angle as it reaches a predetermined position and follows suit.
It is propelled along a predetermined arc-shaped path. Then, in the propulsion tube (2) on the rear end side, along the straight path formed earlier,
It will now be propelled straight forward until it reaches a predetermined position without buckling (see Figure 4).
以上は、前記推進装置を硬い土質の場所で用いた場合の
推進工法であが、軟らかい土質の場所で用いる場合にも
基本的には同じである。しかし、軟らかい土質であって
も経路中で障害物や硬い土質が混在していて、推進用ヘ
ッド（１）がそれにぶつかって推進し難くなるような場
合には、第５図に示すように、後方から押し込み力によ
って途中の屈曲部（Ｊ）が座屈する虞れがある。したが
ってこの場合は、屈曲部（Ｊ）の最大屈曲角を１個おき
に０度に設定することで推進管（２）を２本ずつ一体的
に連結し、推進管（２）を２本で１単位とする。このよ
うにして土中での推進管（２）の保持力を高めた上で、
推進装置を推進させていくのである（第６図参照）。The above is a propulsion method when the propulsion device is used in a place with hard soil, but it is basically the same when it is used in a place with soft soil. However, even if the soil is soft, if the route is mixed with obstacles and hard soil, and the propulsion head (1) collides with them and becomes difficult to propel, as shown in Figure 5, There is a risk that the bending portion (J) in the middle may buckle due to the pushing force from the rear. Therefore, in this case, by setting the maximum bending angle of every other bent part (J) to 0 degrees, two propulsion tubes (2) are integrally connected, and two propulsion tubes (2) are connected together. It is considered as 1 unit. In this way, after increasing the holding power of the propulsion pipe (2) in the soil,
This propels the propulsion device (see Figure 6).
本発明を実施するに、推進管（２）を３本以上ずつ一体
的に連結することで、推進管（２）を３本以上で１単位
とした上で、推進装置を推進させていくようにしてもよ
い。To carry out the present invention, three or more propulsion tubes (2) are integrally connected, so that three or more propulsion tubes (2) are made into one unit and the propulsion device is propelled. You can also do this.
尚、特許請求の範囲の項に図面との対照を便利にするた
めに符号を記すかぐこの記入により本発明は添付図面の
構造に限定されるものではない。It should be noted that the present invention is not limited to the structure of the attached drawings, although reference numerals are written in the claims for convenience of comparison with the drawings.
図面は本発明に係る推進工法の実施例を示し、第１図は
推進用ヘッドと推進管の前部の縦断側面図、第２図は推
進装置を直線的に推進させた場合の平面図、第３図は推
進装置を円弧状経路に沿って推進させた場合の平面図、
第４図は推進装置を始めに直線的に推進させ、後に円弧
状経路に沿って推進させた場合の平面図、第５図は推進
装置の屈曲部が座屈した状態を示す平面図、第６図は推
進装置を軟らかい土質において円弧状経路に沿って推進
させた場合の平面図である。
（１）、 （２）・・・・・・推進体、（Ｆ）・・・・
・・受圧面。The drawings show an embodiment of the propulsion method according to the present invention, FIG. 1 is a vertical cross-sectional side view of the front part of the propulsion head and the propulsion tube, and FIG. 2 is a plan view when the propulsion device is propelled linearly. Figure 3 is a plan view when the propulsion device is propelled along an arcuate path;
Fig. 4 is a plan view when the propulsion device is first propelled linearly and then propelled along an arcuate path; Fig. 5 is a plan view showing a state in which the bent portion of the propulsion device is buckled; FIG. 6 is a plan view when the propulsion device is propelled along an arcuate path in soft soil. (1), (2)...Propellant, (F)...
...Pressure receiving surface.
Claims (1)
且つ、それらの推進体（１）、（２）の先端のものには
推進体長手方向に対して傾斜した受圧面（Ｆ）が形成さ
れている推進装置を、土中に推進させていく推進工法で
あって、前記推進体（１）、（２）の長さを、土質が硬
い場合よりも軟らかい場合において長くして、前記推進
装置を推進させていく推進工法。A plurality of propellant bodies (1) and (2) are connected in a flexible manner,
In addition, a propulsion device in which a pressure receiving surface (F) inclined with respect to the longitudinal direction of the propellant is formed at the tips of the propellants (1) and (2) is propelled into the soil. A propulsion method in which the propulsion device is propelled by making the lengths of the propulsion bodies (1) and (2) longer when the soil is soft than when the soil is hard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7910689A JPH0715237B2 (en) | 1989-03-29 | 1989-03-29 | Propulsion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7910689A JPH0715237B2 (en) | 1989-03-29 | 1989-03-29 | Propulsion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02256795A true JPH02256795A (en) | 1990-10-17 |
| JPH0715237B2 JPH0715237B2 (en) | 1995-02-22 |
Family
ID=13680644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7910689A Expired - Fee Related JPH0715237B2 (en) | 1989-03-29 | 1989-03-29 | Propulsion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715237B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07317491A (en) * | 1994-05-27 | 1995-12-05 | Kubota Corp | Propelling body |
| JP2008038460A (en) * | 2006-08-07 | 2008-02-21 | Nagano Yuki Kk | Small-bore tunnel forming drilling device |
-
1989
- 1989-03-29 JP JP7910689A patent/JPH0715237B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07317491A (en) * | 1994-05-27 | 1995-12-05 | Kubota Corp | Propelling body |
| JP2008038460A (en) * | 2006-08-07 | 2008-02-21 | Nagano Yuki Kk | Small-bore tunnel forming drilling device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0715237B2 (en) | 1995-02-22 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |