JPH0229123B2 - JIBANKAIR YOKOHO - Google Patents
JIBANKAIR YOKOHOInfo
- Publication number
- JPH0229123B2 JPH0229123B2 JP7891884A JP7891884A JPH0229123B2 JP H0229123 B2 JPH0229123 B2 JP H0229123B2 JP 7891884 A JP7891884 A JP 7891884A JP 7891884 A JP7891884 A JP 7891884A JP H0229123 B2 JPH0229123 B2 JP H0229123B2
- Authority
- JP
- Japan
- Prior art keywords
- rotating shaft
- rotating
- support means
- shaft
- ground
- 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.)
- Expired - Lifetime
Links
- 230000003028 elevating effect Effects 0.000 claims description 25
- 238000010276 construction Methods 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 14
- 239000003381 stabilizer Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】
(1) 産業上の利用分野
この発明は軟弱地盤中に回転軸を貫入してその
下端の撹拌翼により地盤を撹拌し、この回転軸の
引抜中あるいは貫入中に撹拌翼部から安定剤を吐
出して軟弱地盤に混入することにより地盤を改良
する工法に関するものである。[Detailed description of the invention] (1) Industrial application field This invention penetrates a rotating shaft into soft ground, stirs the ground with a stirring blade at the lower end, and stirs the ground while the rotating shaft is being pulled out or penetrated. This relates to a construction method for improving the ground by discharging a stabilizer from the wings and mixing it into the soft ground.
(2) 従来の技術
従来のこのような工法として、下端に撹拌翼を
有する回転軸の上端に駆動手段を設け、この駆動
手段をリーダに沿つて昇降させるようにした施工
機を用い、この駆動手段とともに、回転軸を下降
させて所望の深さに達したのち引抜く工法があ
る。(2) Conventional technology This conventional construction method uses a construction machine in which a driving means is provided at the upper end of a rotating shaft having a stirring blade at the lower end, and the driving means is moved up and down along a leader. There is also a method of lowering the rotating shaft to reach the desired depth and then pulling it out.
しかし、このような従来工法では回転軸の上端
に駆動手段を設けてあるため、リーダの高さが高
くなり、また、重い駆動手段をリーダの上端に上
げたまま移動しなければならないので安定が悪く
なるおそれがあるので安定性を増すために施工機
の本体を大きくする必要があるため、施工機が大
型となるなどの欠点がある。 However, in this conventional construction method, the driving means is provided at the upper end of the rotating shaft, which increases the height of the leader.Also, the heavy driving means must be moved with it raised at the upper end of the leader, making it unstable. Since there is a risk of damage, the main body of the construction machine needs to be made larger to increase stability, which has the disadvantage of making the construction machine large.
また、駆動手段を比較的短いリーダに昇降自在
に取付け、この駆動手段に対して回転軸を昇降自
在に取付けて、回転軸を駆動手段により回転させ
つつ地盤中に一定長貫入させると駆動手段を回転
軸から分離して駆動手段のみを上昇させ、回転軸
と駆動手段を再び結合して一定長貫入させる操作
を繰返し、引抜き時も同様の作業を繰返す工法も
ある。 In addition, the driving means is attached to a relatively short leader so as to be freely raised and lowered, and the rotating shaft is attached to the driving means so as to be raised and lowered, and when the rotating shaft is rotated by the driving means and penetrates a certain length into the ground, the driving means is moved. There is also a construction method in which the operation of separating the rotary shaft from the rotary shaft, raising only the drive means, reconnecting the rotary shaft and the drive means, and penetrating for a certain length is repeated, and the same operation is repeated when pulling out.
(3) 発明が解決しようとする問題点
しかし、上記のような従来工法の場合、駆動手
段と回転軸の結合分離の作業を頻繁に行なう必要
があるため、回転軸の貫入および引抜中に休み時
間が多くなり、施工時間が長くなつて効率が低下
する。また、休み時間中に安定剤を吐出し続ける
と安定剤の無駄な消費が大となり、休み時間中に
安定剤の吐出を中止するようになれば操作が煩雑
になり、かつ改良地盤に不連続部分が生じるおそ
れがあるなどの欠点がある。(3) Problems to be solved by the invention However, in the case of the conventional method as described above, it is necessary to frequently perform the work of coupling and separating the drive means and the rotating shaft. This increases construction time and reduces efficiency. In addition, if the stabilizer is continued to be discharged during the rest period, a large amount of stabilizer will be wasted, and if the stabilizer discharge is stopped during the rest period, the operation will be complicated, and the improved ground will be discontinuous. There are drawbacks such as the risk of cracking.
(4) 問題点を解決するための手段
上記の問題点を解決するために、この発明は、
移動自在の施工機本体に設けたリーダの中間部に
中間支持手段と下部支持手段を固定し、この両支
持手段に設けた昇降手段により昇降される昇降部
材を設け、この昇降部材には同部材に対して自由
に回転するチヤツキング手段を設け、リーダの下
部の支持手段には回転手段を設け、下端に撹拌翼
を有する回転軸を、前記回転手段により回転させ
つつ、前記チヤツキング手段により掴持して下降
させる工程と、掴持を開放してチヤツキング手段
を昇降手段とともに上昇させる操作の繰返しによ
り回転軸を地盤中に貫入させたのち、前記と逆の
操作の繰返しにより引抜くとともに、回転軸の引
抜中あるいは貫入中の任意の時期に撹拌翼部分に
安定剤を吐出して地盤に混合することを特徴とす
るものである。(4) Means for solving the problems In order to solve the above problems, this invention
An intermediate support means and a lower support means are fixed to the intermediate part of a leader provided on a movable construction machine main body, and an elevating member is provided that is raised and lowered by elevating means provided on both support means, and the elevating member is a chucking means that rotates freely against the leader, a rotating means is provided in the support means at the lower part of the leader, and a rotating shaft having a stirring blade at the lower end is gripped and held by the chucking means while being rotated by the rotating means. The rotary shaft is penetrated into the ground by repeating the process of lowering the shaft by lifting the chuck, and then releasing the grip and raising the chucking means together with the elevating means. This method is characterized in that the stabilizer is discharged into the stirring blade portion at any time during extraction or penetration and is mixed into the ground.
(5) 作用
この発明は上記の通りであり、リーダ中間部に
ある中間支持手段より下方の昇降部材に設けたチ
ヤツキング手段により回転軸を掴持し、リーダの
下部の回転手段が回転軸に係合してこれを回転さ
せるのであるが、この回転手段は回転軸の下降は
許容するので、回転軸は回転しつつ下つていき、
その下端の撹拌翼で地盤を撹拌する。(5) Effect This invention is as described above, and the rotating shaft is gripped and held by the chucking means provided on the elevating member below the intermediate support means in the intermediate part of the leader, and the rotating means at the lower part of the leader engages with the rotating shaft. This is then rotated, but since this rotating means allows the rotating shaft to descend, the rotating shaft descends while rotating.
The ground is stirred by the stirring blades at the bottom of the machine.
こうして回転軸がある深さまで下ると、チヤツ
キング手段を開放し、回転軸を残してチヤツキン
グ手段と昇降部材のみを上昇させて再び回転軸を
掴持し、昇降部材を下降させる。 When the rotary shaft has descended to a certain depth in this manner, the chucking means is released, and only the chucking means and the elevating member are raised, leaving the rotary shaft behind, and the rotary shaft is grasped again, and the elevating member is lowered.
このような操作の繰返しにより回転軸を所定の
深さまで貫入したのち、逆の操作すなわち、昇降
部材と開放状態のチヤツキング手段を下降させた
のち、回転軸を掴持し、昇降部材を上昇させる操
作の繰返しで回転軸を上昇させる。 After penetrating the rotating shaft to a predetermined depth by repeating this operation, perform the reverse operation, that is, lower the lifting member and chucking means in the open state, then grasp the rotating shaft and raise the lifting member. Raise the rotating shaft by repeating .
また、上記のような回転軸の上昇中、または下
降中と上昇中の両工程中に回転軸の下端の撹拌翼
附近に地盤の安定剤を吐出して地盤に安定剤を供
給撹拌し、地盤を改良する。 In addition, during the ascent of the rotary shaft as mentioned above, or during both the lowering and ascent processes, a stabilizer for the ground is discharged near the stirring blade at the lower end of the rotary shaft to supply the stabilizer to the ground and agitate the ground. improve.
(6) 実施例
第１図、第２図はこの発明工法を実施する施工
機の一例を示すもので、１はクローラにより走行
する施工機本体であり、その前部にリーダ２が設
けてある。(6) Embodiment Figures 1 and 2 show an example of a construction machine that implements the construction method of this invention. 1 is the construction machine main body that runs on a crawler, and a leader 2 is provided at the front of the machine. .
３はリーダ２に昇降自在に取付けたスライダ
で、その上部にスイベルジヨイント４を設け、そ
の下部に中空回転軸５の上端を連結し、ジヨイン
ト４の上端には安定剤供給管６を連結する。 3 is a slider attached to the leader 2 so as to be able to rise and fall; a swivel joint 4 is provided at the upper part of the slider; the upper end of a hollow rotating shaft 5 is connected to the lower part of the slider; and a stabilizer supply pipe 6 is connected to the upper end of the joint 4. .
７は中間支持手段で、リーダ２に固定されてい
る。８は昇降部材で、この部材の上下にはシーブ
９，１０がそれぞれ取付けられ、本体１に設けた
巻上機のドラム１２，１３に巻取られる昇降手段
としてのワイヤロープ１４，１５により昇降部材
８が昇降する。 Reference numeral 7 denotes intermediate support means, which is fixed to the leader 2. Reference numeral 8 denotes an elevating member. Sheaves 9 and 10 are attached to the upper and lower sides of this member, respectively, and the elevating member is moved by wire ropes 14 and 15 as elevating means, which are wound around drums 12 and 13 of a hoist provided in the main body 1. 8 goes up and down.
すなわち、ロープ１４は中間支持手段７のシー
ブ１６を経てシーブ９に巻かれ、その端部を中間
支持手段７に固定する。また、ロープ１５はシー
ブ１０とリーダ２の下端に固定した下部支持手段
１８上のシーブ１７に巻かれてその端部を下部支
持手段１８に固定する。 That is, the rope 14 is wound around the sheave 9 via the sheave 16 of the intermediate support means 7, and its end is fixed to the intermediate support means 7. Further, the rope 15 is wound around the sheave 17 on the lower support means 18 fixed to the lower end of the sheave 10 and the leader 2, and its end is fixed to the lower support means 18.
従つて上部のロープ１４を弛め、下部のロープ
１５をドラム１３で巻き上げると昇降部材８は下
降し、その逆に上部のロープ１４をドラム１２で
巻き上げ、下部のロープ１５を弛めると昇降部材
８は上昇する。 Therefore, when the upper rope 14 is loosened and the lower rope 15 is wound up by the drum 13, the elevating member 8 is lowered; conversely, when the upper rope 14 is wound up by the drum 12 and the lower rope 15 is loosened, the elevating member 8 is lowered. will rise.
１９はチヤツキング手段で、この手段１９は昇
降部材８に対して回動自在で共に昇降するように
取付けてあり、その内部に回転軸５が貫通し、か
つ油圧シリンダなどの駆動手段で開閉するチヤツ
ク爪２０が設けてある。 Reference numeral 19 denotes a chuck means, which is attached to the elevating member 8 so as to be rotatable and move up and down together with the elevating member 8. The rotating shaft 5 passes through the inside of the chuck means 19, and the chuck is opened and closed by a driving means such as a hydraulic cylinder. A claw 20 is provided.
２２は下部支持手段に設けた円板状の回転手段
で、その外周にギヤを設け、このギヤがモータ２
３のピニオンギヤ２４に噛合することにより回転
手段は回される。この回転手段は上下には動か
ず、中央に回転軸５を昇降自在に貫通させる軸孔
がある。 Reference numeral 22 denotes a disc-shaped rotating means provided on the lower support means, and a gear is provided on the outer periphery of the rotating means, and this gear is connected to the motor 2.
The rotating means is rotated by meshing with the pinion gear 24 of No. 3. This rotating means does not move up and down, but has a shaft hole in the center through which the rotating shaft 5 passes freely up and down.
この軸孔は例えば角孔とし、回転軸５は角軸と
し、回転手段２２の回転が回転軸に伝わるように
してある。 This shaft hole is, for example, a square hole, and the rotating shaft 5 is a square shaft so that the rotation of the rotating means 22 is transmitted to the rotating shaft.
回転軸５は中空として、その下端には撹拌翼２
５を設け、前記供給管６から供給された安定剤は
スイベルジヨイント４、回転軸５を通つてこの軸
５の下端の吐出口より吐出される。ただし、吐出
口は回転軸５の下端以外に設ける場合もある。 The rotating shaft 5 is hollow and has stirring blades 2 at its lower end.
5 is provided, and the stabilizer supplied from the supply pipe 6 passes through the swivel joint 4 and the rotating shaft 5 and is discharged from the discharge port at the lower end of the shaft 5. However, the discharge port may be provided at a location other than the lower end of the rotating shaft 5.
第３図は施工状態を示すもので、最初はのよ
うに昇降部材８を上昇位置として、チヤツキング
手段１９のチヤツク爪２０を閉じることにより回
転軸５と結合し、回転手段、回転軸５を駆動し、
ロープ１４，１５の操作により昇降部材８を下降
させて、回転軸５を地中に貫入させていく。 FIG. 3 shows the construction state. Initially, the elevating member 8 is in the raised position as shown in FIG. death,
The lifting member 8 is lowered by operating the ropes 14 and 15, and the rotating shaft 5 is penetrated into the ground.
のように昇降部材８が下限に達すると、チヤ
ツク爪２０を開き、昇降部材８を上昇させ、の
ように上限に達するとトヤツク爪２０を閉じて
のように昇降部材８を下限まで下降させる。 When the elevating member 8 reaches the lower limit as shown in , the chuck pawl 20 is opened and the elevating member 8 is raised, and when the elevating member 8 reaches the upper limit as shown in the figure, the chuck pawl 20 is closed and the elevating member 8 is lowered to the lower limit as shown.
このような操作の繰返しによつて、のように
撹拌翼７が所望の深さに達すると、供給管６から
安定剤を供給して回転軸５の下端からこの安定剤
を吐出しつつ下降時の逆の操作で昇降部材８を上
昇させて回転軸５を回転しつつ第３図にように
引抜き、第３図のように撹拌翼２５が地上に上
つた状態で回転軸５を止めると地中に柱状の改良
部２６ができる。 By repeating such operations, when the stirring blade 7 reaches the desired depth as shown in the figure, stabilizer is supplied from the supply pipe 6 and the stabilizer is discharged from the lower end of the rotating shaft 5 while descending. Raise the elevating member 8 by the reverse operation, and pull it out as shown in Fig. 3 while rotating the rotating shaft 5. When the rotating shaft 5 is stopped with the stirring blade 25 above the ground as shown in Fig. 3, the A columnar improved portion 26 is formed inside.
なお、実施例では軸５の引抜き時にのみ安定剤
を吐出しているが、貫入時に吐出してもよく、ま
た、貫入時には、回転軸５の下端から高圧水を噴
出して水ジエツトにより貫入を促進してもよい。 In the embodiment, the stabilizer is discharged only when the shaft 5 is pulled out, but it may also be discharged when the shaft 5 is penetrated.Also, at the time of penetration, high-pressure water is jetted from the lower end of the rotating shaft 5 to prevent penetration with a water jet. May be promoted.
(7) 効 果
この発明の改良方法における回転軸の貫入およ
び引抜きの反力を受ける中間支持手段はリーダの
中間部にあるので、この中間支持手段より上方の
リーダの強度は余り高くする必要がなく、従つて
軽量にできる。また、昇降部材の昇降手段もリー
ダの中間部以下となり、回転手段もリーダの下端
になるので施工機全体が軽量で重心の低いものと
なり、安定性がよい。従つて施工が容易かつ安全
に行なえ、移動も容易であるから施工能率が向上
するなどの効果がある。(7) Effects In the improved method of the present invention, the intermediate support means that receives the reaction force of the rotation shaft penetration and withdrawal is located in the middle part of the leader, so the strength of the leader above the intermediate support means must not be too high. Therefore, it can be made lightweight. Further, since the elevating means for the elevating member is located below the middle part of the leader, and the rotating means is also located at the lower end of the leader, the construction machine as a whole is lightweight and has a low center of gravity, resulting in good stability. Therefore, construction can be carried out easily and safely, and since it is easy to move, construction efficiency can be improved.
第１図はこの発明工法を実施する施工機の側面
図、第２図は同じく一部切欠拡大側面図、第３図
のからは施工工程を示す工程別断面図であ
る。
１……施工機本体、２……リーダ、５……回転
軸、７……中間支持手段、８……昇降部材、１
４，１５……昇降手段としてのワイヤロープ、１
８……下部支持手段、１９……チヤツキング手
段、２２……回転手段、２５……撹拌翼。
FIG. 1 is a side view of a construction machine for carrying out the construction method of the present invention, FIG. 2 is an enlarged partially cutaway side view, and FIG. 3 is a cross-sectional view showing each construction process. DESCRIPTION OF SYMBOLS 1... Construction machine main body, 2... Leader, 5... Rotating shaft, 7... Intermediate support means, 8... Lifting member, 1
4, 15... Wire rope as lifting means, 1
8... Lower support means, 19... Chucking means, 22... Rotating means, 25... Stirring blade.
Claims (1)
支持手段と下部支持手段を固定し、この両支持手
段間には、両支持手段に設けた昇降手段により昇
降される昇降部材を設け、この昇降部材には同部
材に対して自由に回転するチヤツキング手段を設
け下部支持手段には回転手段を設け、下端に撹拌
翼を有する回転軸を前記回転手段により回転させ
つつ、前記チヤツキング手段により掴持して下降
させる工程と、掴持を開放してチヤツキング手段
を昇降手段とともに上昇させる操作の繰返しによ
り回転軸を地盤中に貫入させたのち、前記と逆の
操作の繰返しにより引抜くとともに、回転軸の引
抜中あるいは貫入中の任意の時期に撹拌翼部分に
安定剤を吐出して地盤と混合することを特徴とす
る地盤改良工法。1. An intermediate support means and a lower support means are fixed to a leader provided on a movable construction machine main body, and an elevating member is provided between both support means to be raised and lowered by means of elevating means provided on both support means. The member is provided with a chucking means that freely rotates relative to the member, and the lower support means is provided with a rotating means, and a rotating shaft having a stirring blade at the lower end is rotated by the rotating means and gripped and held by the chucking means. The rotary shaft is penetrated into the ground by repeating the process of lowering the shaft by lifting the chuck, and then releasing the grip and raising the chucking means together with the elevating means. A soil improvement method characterized by discharging a stabilizer into the stirring blade part at any time during extraction or penetration to mix it with the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7891884A JPH0229123B2 (en) | 1984-04-18 | 1984-04-18 | JIBANKAIR YOKOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7891884A JPH0229123B2 (en) | 1984-04-18 | 1984-04-18 | JIBANKAIR YOKOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60223519A JPS60223519A (en) | 1985-11-08 |
| JPH0229123B2 true JPH0229123B2 (en) | 1990-06-28 |
Family
ID=13675231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7891884A Expired - Lifetime JPH0229123B2 (en) | 1984-04-18 | 1984-04-18 | JIBANKAIR YOKOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0229123B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3871775B2 (en) * | 1997-08-22 | 2007-01-24 | 株式会社ワイビーエム | Agitator for ground improvement machine |
-
1984
- 1984-04-18 JP JP7891884A patent/JPH0229123B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60223519A (en) | 1985-11-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |