JPH03183893A - Excavator for execution of soil cement pile - Google Patents

Excavator for execution of soil cement pile

Info

Publication number
JPH03183893A
JPH03183893A JP32338389A JP32338389A JPH03183893A JP H03183893 A JPH03183893 A JP H03183893A JP 32338389 A JP32338389 A JP 32338389A JP 32338389 A JP32338389 A JP 32338389A JP H03183893 A JPH03183893 A JP H03183893A
Authority
JP
Japan
Prior art keywords
shaft
spiral
outer shaft
blade
peripheral surface
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
Application number
JP32338389A
Other languages
Japanese (ja)
Inventor
Yoshinori Mutou
武東 義憲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MUTOU KOMUTEN KK
Original Assignee
MUTOU KOMUTEN KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MUTOU KOMUTEN KK filed Critical MUTOU KOMUTEN KK
Priority to JP32338389A priority Critical patent/JPH03183893A/en
Publication of JPH03183893A publication Critical patent/JPH03183893A/en
Pending legal-status Critical Current

Links

Landscapes

  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Earth Drilling (AREA)

Abstract

PURPOSE:To sufficiently mix sand and cement milk by forming an excavation shaft of an external shaft and internal shaft which are rotated reversely each other, winding a spiral blade on the peripheral surface of a projection of the internal shaft, and winding a stirring transfer blade on the peripheral surface of the external shaft. CONSTITUTION:An excavation shaft 1 is constituted of an external shaft 1a and internal shaft 1b to rotate them into reverse direction to each other, and the lower end of the internal shaft 1b is projected from the lower end of the external shaft 1a. After that, a spiral blade 3 equipped with a large number of bits 30 on the lower edge is wound the peripheral surface of a projection of the internal shaft 1b, and a stirring transfer blade 2 is wound on the peripheral surface of the external shaft 1a. In the stirring transfer blade 2, a spiral section 2a fixed to the peripheral surface of the external shaft 1a and a spiral section 2b arranged upward at a certain interval are formed. A return section 2c is provided to at least one of both signal sections 2a and 2b, and a space K is formed. A twist direction of the spiral blade 3 and stirring transfer blade 2 is set to an opposite direction to each other.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、フィルセメント杭を施工する為の掘削機に
関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an excavator for constructing fill cement piles.

〔従来の技術〕[Conventional technology]

この種の掘削機としては、掘削軸を、外軸とこれに同軸
上に挿通された内軸とから構成したものがあり、このも
のでは、外軸の下端から突出した内軸の外周面に、下縁
にビットを備えた螺旋羽根を巻着すると共に、外軸の外
周面に撹拌棒を突設している、そして、上記掘削軸は、
リーグに上下動可能に取り付けられた軸回転駆動装置に
より、前記外軸の回転方向と内輪のそれとを反対方向に
回転駆動するようにしている。
Some excavators of this type have an excavator shaft consisting of an outer shaft and an inner shaft coaxially inserted through the outer shaft. , a spiral blade equipped with a bit is wound around the lower edge, and a stirring bar is protruded from the outer peripheral surface of the outer shaft, and the excavation shaft has:
A shaft rotation drive device attached to the league so as to be vertically movable rotates the outer shaft in a direction opposite to that of the inner ring.

このものでは、上記外軸と内軸との相対回転により、ビ
ットによる掘削方向と撹拌棒による撹拌方向とが逆にな
ることから、土砂とセメントミルクの混合物、即ち、フ
ィルセメントは上方への移送途中において、その回転流
の方向が変化することとなり、その結果、掘削軸を一本
の軸に撹拌棒を設けて構成したものと比較して、撹拌能
力は向上したものとなる。
In this device, due to the relative rotation between the outer shaft and the inner shaft, the direction of excavation by the bit and the direction of stirring by the stirring rod are reversed, so that the mixture of earth and sand and cement milk, that is, fill cement, is transferred upward. Along the way, the direction of the rotational flow changes, and as a result, the stirring ability is improved compared to a structure in which a single excavation shaft is provided with a stirring rod.

ところが、実際に、上記掘削機を使用してフィルセメン
ト杭を施工し、この杭の土砂とセメントミルクの混合度
合を調査してみると、その度合は十分なものとなってい
ない。
However, when a fill cement pile was actually constructed using the above excavator and the degree of mixing of earth and sand and cement milk in this pile was investigated, it was found that the degree of mixing was not sufficient.

これは、土砂とセメントミルクの撹拌が、撹拌棒による
水平剪断によるもののみとなっているからである。
This is because the soil and cement milk are stirred only by horizontal shearing by the stirring rod.

尚、土砂とセメントとの混合については、シャベルでコ
ネ返す態様で行われるのが、最も効率的であるといえる
It should be noted that it can be said that the most efficient method for mixing earth and sand with cement is to mix it with a shovel.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

そこで、この発明では、土砂とセメントミルクとの混合
度合が十分なフィルセメントが確保できるフィルセメン
ト杭施工用の掘削機を提供することを課題とする。
Therefore, an object of the present invention is to provide an excavator for constructing fill cement piles that can secure fill cement with a sufficient mixing degree of earth and sand and cement milk.

〔課題を解決するための手段〕[Means to solve the problem]

この発明では、上記課題を解決する為に、掘削軸(1)
を、外軸(1a)とこれと同軸上に挿通された内軸(1
b)とから構成すると共に、前記外軸(1a)の回転方
向と内軸(1b)のそれが反対方向となるようにそれぞ
れを回転駆動する回転駆動装置(4)を具備させ、前記
内軸(1b)の下端部を外軸(1a)の下端から突出さ
せると共に、前記内軸(1b)の突出部の外周に、下縁
に多数のビット(30)を具備した螺旋羽I(3)を、
外軸(1a)の外周に撹拌移送羽根(2)を、それぞれ
巻着し、前記撹拌移送羽根(2)が、外軸(1a)の外
周面に固着された螺旋状部(2a)と、この螺旋状部(
2a)と外軸(1a)の軸方向に一定間隔をおいて上方
に配設され、且つ、外軸(1a)の外周面に固着された
螺旋状部(2b)とからなるものとし、前記螺旋状部(
2a)の上端と螺旋状部(2b)の下端とのうち少なく
とも一方を折返して折返部(2c)を形成すると共に、
これら端部相互を、前記折返部(2c)及びその近傍の
内面と前記外軸(1a)の外周面との間に空隙(K)を
形成する態様で繋ぎ、前記螺旋状部(2a)(2b)の
捩じれ方向を上記螺旋羽根(3)のそれと反対方向に設
定している〔作用] この発明は次のような作用を有する。
In this invention, in order to solve the above problems, the excavation shaft (1)
, an outer shaft (1a) and an inner shaft (1a) inserted coaxially with the outer shaft (1a).
b), and is provided with a rotation drive device (4) for rotationally driving each of the outer shaft (1a) and the inner shaft (1b) so that the direction of rotation is opposite to that of the inner shaft (1b), (1b) has a lower end protruding from the lower end of the outer shaft (1a), and a spiral wing I (3) is provided with a number of bits (30) on the lower edge on the outer periphery of the protruding part of the inner shaft (1b). of,
a spiral portion (2a) in which stirring transfer blades (2) are respectively wound around the outer circumference of the outer shaft (1a), and the stirring transfer blades (2) are fixed to the outer peripheral surface of the outer shaft (1a); This spiral part (
2a) and a spiral portion (2b) disposed above the outer shaft (1a) at a constant interval in the axial direction and fixed to the outer peripheral surface of the outer shaft (1a), Spiral part (
At least one of the upper end of 2a) and the lower end of the spiral portion (2b) is folded back to form a folded portion (2c), and
These end portions are connected to each other in such a manner that a gap (K) is formed between the folded portion (2c) and the inner surface in its vicinity and the outer peripheral surface of the outer shaft (1a), and the spiral portion (2a) ( The twisting direction of 2b) is set in the opposite direction to that of the spiral blade (3) [Function] The present invention has the following effects.

この掘削機では、軸回転駆動装置(4)を駆動状態にす
ると、外軸(1a)が回転状態になると共に内軸(1b
)がこれの反対方向に回転状態となる。
In this excavator, when the shaft rotation drive device (4) is set to the driving state, the outer shaft (1a) is set to the rotating state and the inner shaft (1b
) rotates in the opposite direction.

上記状態で削孔作業を開始すると、ビット(30)によ
り地盤は掘起こされ、掘起こされた土砂とセメントミル
クの混合物(以下、ビット(30)近傍で混合された土
砂とセメントミルクの混合物を、1次フィルセメントと
いう)は、内軸(1b)に巻着された螺旋羽根(3)の
板面によって、螺旋羽根(3)の下端から上端まで押圧
移送され、更に、これよりも上方の外軸(1a)に巻着
された撹拌移送羽根(2)の下端、即ち、螺旋状部(2
a)の下端に移送される。この螺旋羽根(3)から螺旋
状部(2a)に、1次フィルセメントが移動する際には
、1次フィルセメントの回転流は逆方向に変化し、この
とき、前記1次フィルセメントは更に撹拌混合される(
この状態の土砂とセメントミルクの混合物を、以下、2
次フィルセメントという)。
When drilling work is started in the above state, the ground is dug up by the bit (30), and a mixture of excavated earth and sand and cement milk (hereinafter referred to as a mixture of earth and sand and cement milk mixed near the bit (30)) is excavated by the bit (30). , primary fill cement) is transferred under pressure from the lower end of the spiral blade (3) to the upper end of the spiral blade (3) by the plate surface of the spiral blade (3) wound around the inner shaft (1b). The lower end of the stirring transfer blade (2) wound around the outer shaft (1a), that is, the spiral portion (2
a) is transferred to the lower end. When the primary fill cement moves from this spiral vane (3) to the spiral part (2a), the rotational flow of the primary fill cement changes in the opposite direction, and at this time, the primary fill cement further Stir and mix (
The mixture of earth and sand and cement milk in this state is as follows:
Next fill cement).

そして、この発明のものでは、螺旋状部(2a)の下端
から上端まで移送されてきた2次フィルセメントは、折
返部(2c)の下端上面→空隙(K)→螺旋状部(2a
)の下部側の経路で移動する。即ち、上記2次フィルセ
メントは、上記経路で循環することとなる。
In this invention, the secondary fill cement that has been transferred from the lower end to the upper end of the spiral portion (2a) is transferred from the upper surface of the lower end of the folded portion (2c) → the gap (K) → the spiral portion (2a
) to move along the lower path. That is, the secondary fill cement will circulate through the above route.

削孔作業が進み、上記螺旋状部(2a)の下端部への2
次フィルセメントの移送量が増加し、螺旋状部(2a)
と螺旋状部(2b)との間に位置する2次混合物の充填
率が増加していくと、それに伴って、2次フィルセント
は、螺旋状部(2a)の下端→折返部(2c)の下端上
面峠空隙(K)→螺旋状部(2a)の下部側の経路で移
動するものと、螺旋状部(2a)の上端峠折返部(2c
)を構成する土壁上面→螺旋状部(2b)の下端上面→
螺旋状部(2b)の上端の経路で移動するものとに、折
返部(2c)の土壁を介して、分離移動する。即ち、2
次フィルセメントは、折返部(2c)を構成する土壁の
下面によってコネ返される態様で撹拌され、最終フィル
セメントとなって上方に移送される。
As the drilling work progresses, 2 holes are drilled into the lower end of the spiral portion (2a).
Next, the amount of cement transferred increases and the spiral part (2a)
As the filling rate of the secondary mixture located between the helical portion (2b) and the helical portion (2b) increases, the secondary filcentage increases from the lower end of the helical portion (2a) to the folded portion (2c). The one that moves from the lower end top surface pass gap (K) of
) → Upper surface of the lower end of the spiral part (2b) →
The one that moves along the path at the upper end of the spiral portion (2b) separates and moves via the earthen wall of the folded portion (2c). That is, 2
The next fill cement is stirred in such a manner that it is turned back by the lower surface of the earthen wall constituting the folded part (2c), becomes the final fill cement, and is transported upward.

(実施例] 以下、この発明の構成を実施例として示した図面に従っ
て説明する。
(Example) Hereinafter, the configuration of the present invention will be described with reference to the drawings showing examples.

この実施例のソイルセメント杭施工用の掘削機は、第1
図に示すように、パイルドライバー(P)の前部に立設
したリーダ(R)に軸回転駆動装置(4)を上下動可能
に取付け、この軸回転駆動装置(4)に掘削軸となる回
転軸(1)を取付けてti戒したものである。そして、
前記回転軸(1)を、外軸(1a)とこれと同軸上に挿
通された内軸(1b)とから構威し、外軸(1a)の回
転方向と内輪(1b)の回転方向が反対となるように、
従来のものと同様のギヤーボックス(40)を介して、
上記軸回転駆動装置(4)により回転駆動している。
The excavator for soil cement pile construction in this example is
As shown in the figure, a shaft rotation drive device (4) is attached to the leader (R) installed upright at the front of the pile driver (P) so as to be able to move up and down, and this shaft rotation drive device (4) serves as an excavation shaft. The rotary shaft (1) is attached and the rotary shaft (1) is installed. and,
The rotating shaft (1) is composed of an outer shaft (1a) and an inner shaft (1b) inserted coaxially with the outer shaft (1a), such that the direction of rotation of the outer shaft (1a) and the direction of rotation of the inner ring (1b) are To the contrary,
Through a gearbox (40) similar to the conventional one,
It is rotationally driven by the shaft rotation drive device (4).

尚、回転軸(1)は、同図に示すように、リーダ(R)
の中央部に固定配設した中間振止め装置(R1)によっ
てその中央部分が、リーダ(R)の下部に固定配設した
下部振止め装W (R2)によってその下部が、それぞ
れ回動自在に支持してあり、これにより、回転軸(1)
は前記リーダ(R)と平行となるようにしである。
In addition, as shown in the figure, the rotating shaft (1) is connected to the leader (R).
An intermediate steady-stop device (R1) fixedly disposed at the center of the reader (R) allows the center portion to be freely rotated, and a lower steady-stop device W (R2) fixedly disposed at the bottom of the leader (R) allows the lower portion to rotate freely. The rotating shaft (1)
is parallel to the leader (R).

上記した回転軸(1)について、更に詳述すると、第2
図及び第3図に示すように、内軸(lb)の下端部を外
軸(1a)の下端から突出させると共に、この内輪(1
b)の突出部分の直径を外軸(Ia)のそれと同径に設
定(以下、この部分を拡大径部(10)という)し、前
記外軸(1a)の下端部と拡大径部(10)の上端部と
の間にシール(S)を介装することにより、前記外軸(
1a)の下端部にこれと内軸(1b)との間へのフィル
セメントの侵入を防止している。そして、上記内軸(1
b)の拡大径部(10)の外周面に、多数のピッ1−(
30)を具備した螺旋羽根(3)(3)を一対巻着する
と共に、外軸(1a)の外周下部域に撹拌移送羽根(2
)を巻着している上記撹拌移送羽根(2)は、第2図及
び第3図に示すように、外軸(1a)の外周面に固着さ
れた螺旋状部(2a)と、この螺旋状部(2a)と外軸
(1a)の軸方向に一定間隔をおいて上方に配設され、
且つ、外軸(1a)の外周面に固着された螺旋状部(2
b)とからなり、前記螺旋状部(2a)の上端と螺旋状
部(2b)の下端とのうち少なくとも一方を折返して折
返部(2c)を形成すると共に、これら端部相互を、前
記折返部(2c)及びその近傍の内面と上記外軸(1a
)との間に空隙(K)を形成する態様で繋いで構成して
いる。そして、前記螺旋状部(2a)(2b)の捩じれ
方向を上記した螺旋羽根(3)のそれと反対方向に設定
し、他方、前記折返部(2c)における外方突出端の回
転軌跡を、上記螺旋状部(2a)(2b)における外周
縁の回転軌跡と略−致させている。したがって、削孔作
業に伴って、次々に土砂とセメントミルクの混合物であ
るフィルセメントは、ビット(30)→螺旋羽根(3)
峠撹拌移送羽根(2)の経路で上方へ移送され、この移
送途中において、折返部(1c)の外方突出部の外側か
ら溢れ落ちるようなことはないものとなる。
To explain the above-mentioned rotating shaft (1) in more detail, the second
As shown in the figures and FIG. 3, the lower end of the inner shaft (lb) protrudes from the lower end of the outer shaft (1a), and
The diameter of the protruding part b) is set to be the same as that of the outer shaft (Ia) (hereinafter, this part is referred to as the enlarged diameter part (10)), and the lower end of the outer shaft (1a) and the enlarged diameter part (10 ) by interposing a seal (S) between the upper end of the outer shaft (
1a) to prevent fill cement from entering between this and the inner shaft (1b). Then, the inner axis (1
A large number of pins 1-(
A pair of spiral blades (3) (3) each having a blade (30) are wound around the outer shaft (1a), and a stirring transfer blade (2) is wound around the lower area of the outer periphery of the outer shaft (1a).
As shown in FIGS. 2 and 3, the agitation transfer blade (2) around which the disposed above the shaped part (2a) and the outer shaft (1a) at a constant interval in the axial direction,
In addition, a spiral portion (2
b), at least one of the upper end of the spiral part (2a) and the lower end of the spiral part (2b) is folded back to form a folded part (2c), and these ends are mutually connected to the folded part (2c). (2c) and the inner surface in the vicinity thereof and the outer shaft (1a)
) are connected to form a gap (K) between them. Then, the twisting direction of the spiral portions (2a) and (2b) is set to be opposite to that of the spiral blade (3), and on the other hand, the rotation locus of the outwardly protruding end of the folded portion (2c) is set as described above. The locus of rotation of the outer periphery of the spiral portions (2a) and (2b) substantially coincides with each other. Therefore, as the drilling process progresses, the fill cement, which is a mixture of earth and sand and cement milk, is transferred from the bit (30) to the spiral blade (3).
It is transferred upward along the path of the mountain pass agitation transfer blade (2), and during this transfer, it does not overflow from the outside of the outward protrusion of the folded portion (1c).

尚、この実施例のものでは、上記内軸(1b)における
拡大径部(10)の下端に、第3図に示すような噴出口
(50)が設けてあり、この噴出口(50)からセメン
トミルクが噴出されるようにしである。特に、このもの
では、同図に示すように、セメントミルクの噴出口(5
0)の上流側に空室(51)を設けると共に、この空室
(51)内に上下動自在にボール(52)を収容してお
り、圧力差により、前記噴出口(50)から空室(51
)内にフィルセメントが逆流したときには、前記ボール
(52)が上昇して、ノズル(5)における空室(51
)との連道口を「閉j状態にし、これにより、ノズル(
5)の目詰まりが防止されるようにしである。
In this embodiment, a spout (50) as shown in FIG. 3 is provided at the lower end of the enlarged diameter portion (10) of the inner shaft (1b), and from this spout (50) Cement milk is to be squirted out. In particular, in this case, as shown in the same figure, the cement milk spout (5
An empty chamber (51) is provided on the upstream side of the air outlet (51), and a ball (52) is accommodated in this empty chamber (51) so as to be able to move up and down. (51
), the ball (52) rises and fills the empty space (51) in the nozzle (5).
) is set to the closed state, thereby opening the nozzle (
5) to prevent clogging.

」二記掘削機を使用して削孔した場合、第4図(a)〜
(d)に示す外軸(1a)のA矢印方向の回転及び内軸
(1b)のB矢印方向の回転に伴い、ビット(30)に
よって掘削された土砂と、ノズル(5)によって圧送注
入されたセメントミルクはビット(30)により撹拌さ
れて1次フィルセメントとなり、この1次フィルセメン
トは螺旋羽根(3)(3)によって、同図(a)の実線
及び破線に示すように、外軸(1a)に対して相対移動
する。そして、この1次フィルセメントは、内軸(1b
)の拡大径部(10)から上方に位置する外軸(1a)
に移動するときに、その回転流が逆方向に変化し、この
回転流の変化により撹拌されて2次フィルセメントとな
る。
” When drilling holes using the excavator described in Section 2, Figure 4 (a) ~
With the rotation of the outer shaft (1a) in the direction of arrow A and the rotation of the inner shaft (1b) in the direction of arrow B shown in FIG. The cement milk is stirred by the bit (30) to become primary fill cement, and this primary fill cement is moved to the outer axis by the spiral blades (3) (3) as shown by the solid and broken lines in Figure (a). Move relative to (1a). This primary fill cement is then filled with the inner shaft (1b
) The outer shaft (1a) is located above the enlarged diameter portion (10) of the
When moving, the rotational flow changes in the opposite direction, and the change in rotational flow causes the cement to be agitated and become a secondary fill cement.

その後、上記2次フィルセメントは、同図(a)の実線
及び破線に示すように、折返部(2c)を構成する土壁
によりコネ返されながら循環することとなる。そして、
2次フィルセメントの充填率の増加に伴い、2次フィル
セメントは、同図の実線及び破線、並びに、二点鎖線に
示すように、二つの経路を移動することとなる。即ち、
この撹拌移送羽根(2)が巻回された外軸(1a)部分
において、2次フィルセメントは、更に撹拌混合されて
最終フィルセメントとなり、同時に上方に移送されるこ
ととなる。
Thereafter, the secondary fill cement circulates while being turned back by the earthen wall that constitutes the folded portion (2c), as shown by the solid line and broken line in FIG. 2(a). and,
As the filling rate of the secondary fill cement increases, the secondary fill cement moves along two routes, as shown by the solid line, the broken line, and the dashed-two dotted line in the figure. That is,
In the outer shaft (1a) portion around which the stirring and transfer blade (2) is wound, the secondary fill cement is further stirred and mixed to become the final fill cement, and is simultaneously transferred upward.

尚、上記実施例のものでは、折返部(2c)を、第2図
に示すように、断面U字状としたが、これに限定するこ
となく、断面V字状或いはその他の形状としてもよい。
In the above embodiment, the folded portion (2c) has a U-shaped cross section as shown in FIG. 2, but is not limited to this, and may have a V-shaped cross section or other shapes. .

他方、上記実施例のものに、先に出願した特願平1−2
69514号のものを付加すると更に撹拌能力が向上し
たものとなる。
On the other hand, the above-mentioned example is based on the previously filed patent application No. 1-2.
Addition of No. 69514 further improves the stirring ability.

〔発明の効果〕〔Effect of the invention〕

この発明は、上述のような構成を有するものであるから
、次の効果を有する。
Since the present invention has the above-described configuration, it has the following effects.

ピッI−(30)付近で撹拌された1次フィルセメント
は、内軸(1b)から外軸(1a)に移動するときの回
転流の変化により撹拌混合されて2次フィルセメントと
なり、又、この2次フィルセメントは、螺旋状部(2a
)の下端→折返部の下端上面富空隙(K)[相]螺旋状
部(2a)の下部側の経路で循環して、折返部(2c)
の土壁の下面によってコネ返される態様で撹拌されて最
終フィルセメントとなるから、この掘削機により施工さ
れたセメントソイル杭の土砂とセメントミルクとの混合
度合は十分なものとなる。
The primary fill cement stirred near Pit I-(30) is stirred and mixed into secondary fill cement by the change in rotational flow when moving from the inner shaft (1b) to the outer shaft (1a), and This secondary fill cement has a spiral part (2a
) → Lower end of the folded part Top surface rich void (K) [phase] Circulate in the path on the lower side of the spiral part (2a) and return to the folded part (2c)
The cement milk is mixed with the soil of the cement soil pile constructed by this excavator to a sufficient degree because it is stirred by the lower surface of the soil wall to form the final fill cement.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明のフィルセメント抗施工の掘削機の全
体説明図。第2図は前記掘削機の掘削軸及びこれを回転
駆動する軸回転駆動装置の説明図、第3図は前記掘削機
の掘削軸の説明図。第4図(a)〜(d)は回転軸の説
明図であり、且つ、フィルセメントの移動経路及び回転
軸である外軸と内軸の回転に伴う撹拌移送羽根及び螺旋
羽根の状態を示す図。 (1)・・・掘削軸 (1b)・・・内軸 (2a)・・・螺旋状部 (2c)・・・折返部 (3)・・・螺旋羽根 (1a)・・・外軸 (2)・・・撹拌移送羽根 (2b)・・・螺旋状部 (K)・・・空隙
FIG. 1 is an overall explanatory diagram of an excavator for fill cement concrete construction according to the present invention. FIG. 2 is an explanatory diagram of the excavation shaft of the excavator and a shaft rotation drive device that rotationally drives the same, and FIG. 3 is an explanatory diagram of the excavation shaft of the excavator. FIGS. 4(a) to 4(d) are explanatory diagrams of the rotating shaft, and also show the moving path of fill cement and the state of the stirring transfer blades and spiral blades as the outer and inner shafts, which are the rotating shafts, rotate. figure. (1)...Drilling shaft (1b)...Inner shaft (2a)...Spiral part (2c)...Folded part (3)...Spiral blade (1a)...Outer shaft ( 2)...Agitating transfer blade (2b)...Spiral part (K)...Void

Claims (1)

【特許請求の範囲】[Claims] 1、掘削軸(1)を、外軸(1a)とこれと同軸上に挿
通された内軸(1b)とから構成すると共に、前記外軸
(1a)の回転方向と内軸(1b)のそれが反対方向と
なるようにそれぞれを回転駆動する回転駆動装置(4)
を具備させ、前記内軸(1b)の下端部を外軸(1a)
の下端から突出させると共に、前記内軸(1b)の突出
部の外周に、下縁に多数のビット(30)を具備した螺
旋羽根(3)を、外軸(1a)の外周に撹拌移送羽根(
2)を、それぞれ巻着し、前記撹拌移送羽根(2)が、
外軸(1a)の外周面に固着された螺旋状部(2a)と
、この螺旋状部(2a)と外軸(1a)の軸方向に一定
間隔をおいて上方に配設され、且つ、外軸(1a)の外
周面に固着された螺旋状部(2b)とからなるものとし
、前記螺旋状部(2a)の上端と螺旋状部(2b)の下
端とのうち少なくとも一方を折返して折返部(2c)を
形成すると共に、これら端部相互を、前記折返部(2c
)及びその近傍の内面と前記外軸(1a)の外周面との
間に空隙(K)を形成する態様で繋ぎ、前記螺旋状部(
2a)(2b)の捩じれ方向を上記螺旋羽根(3)のそ
れと反対方向に設定したことを特徴とするソイルセメン
ト杭施工用の掘削機。
1. The excavation shaft (1) is composed of an outer shaft (1a) and an inner shaft (1b) inserted coaxially with the outer shaft (1a), and the rotation direction of the outer shaft (1a) and the inner shaft (1b) are A rotary drive device (4) that rotates each in the opposite direction.
The lower end of the inner shaft (1b) is connected to the outer shaft (1a).
A spiral blade (3) having a plurality of bits (30) on the lower edge is protruded from the lower end of the inner shaft (1b), and a stirring transfer blade is provided on the outer periphery of the outer shaft (1a). (
2) are wound around each other, and the stirring transfer blade (2) is
a spiral portion (2a) fixed to the outer circumferential surface of the outer shaft (1a); a spiral portion (2a) disposed above the spiral portion (2a) and the outer shaft (1a) at a constant interval in the axial direction; A spiral part (2b) is fixed to the outer peripheral surface of the outer shaft (1a), and at least one of the upper end of the spiral part (2a) and the lower end of the spiral part (2b) is folded back. A folded part (2c) is formed, and these ends are connected to each other by the folded part (2c).
) and the inner surface in the vicinity thereof and the outer peripheral surface of the outer shaft (1a) are connected in such a manner as to form a gap (K), and the spiral portion (
2a) An excavator for soil cement pile construction, characterized in that the twisting direction of (2b) is set in the opposite direction to that of the spiral blade (3).
JP32338389A 1989-12-12 1989-12-12 Excavator for execution of soil cement pile Pending JPH03183893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32338389A JPH03183893A (en) 1989-12-12 1989-12-12 Excavator for execution of soil cement pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32338389A JPH03183893A (en) 1989-12-12 1989-12-12 Excavator for execution of soil cement pile

Publications (1)

Publication Number Publication Date
JPH03183893A true JPH03183893A (en) 1991-08-09

Family

ID=18154136

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32338389A Pending JPH03183893A (en) 1989-12-12 1989-12-12 Excavator for execution of soil cement pile

Country Status (1)

Country Link
JP (1) JPH03183893A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006193938A (en) * 2005-01-12 2006-07-27 Nittoc Constr Co Ltd Two-shaft type deep mixing device
AU2005265697B2 (en) * 2004-07-26 2010-09-23 Sekisui Chemical Co., Ltd. Buried pipe examining method
JP2012219569A (en) * 2011-04-13 2012-11-12 Flowtechno Corp Method and device for creating ground hardening layer
CN104878746A (en) * 2015-06-14 2015-09-02 孔超 Bidirectional extruding short spiral pile-forming device and pile-forming method
CN104878745A (en) * 2015-06-14 2015-09-02 孔超 Pile-forming device with double-helix drill rod and pile-forming method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5943590B2 (en) * 1980-09-24 1984-10-23 東レ株式会社 sheet-like material
JPS6436892A (en) * 1987-07-30 1989-02-07 Hiroshi Shimoide Excavator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5943590B2 (en) * 1980-09-24 1984-10-23 東レ株式会社 sheet-like material
JPS6436892A (en) * 1987-07-30 1989-02-07 Hiroshi Shimoide Excavator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2005265697B2 (en) * 2004-07-26 2010-09-23 Sekisui Chemical Co., Ltd. Buried pipe examining method
JP2006193938A (en) * 2005-01-12 2006-07-27 Nittoc Constr Co Ltd Two-shaft type deep mixing device
JP4623720B2 (en) * 2005-01-12 2011-02-02 日特建設株式会社 Biaxial deep mixing processing equipment
JP2012219569A (en) * 2011-04-13 2012-11-12 Flowtechno Corp Method and device for creating ground hardening layer
CN104878746A (en) * 2015-06-14 2015-09-02 孔超 Bidirectional extruding short spiral pile-forming device and pile-forming method
CN104878745A (en) * 2015-06-14 2015-09-02 孔超 Pile-forming device with double-helix drill rod and pile-forming method

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