JPH0641950A - Rectangular foundation improving machine - Google Patents
Rectangular foundation improving machineInfo
- Publication number
- JPH0641950A JPH0641950A JP21562892A JP21562892A JPH0641950A JP H0641950 A JPH0641950 A JP H0641950A JP 21562892 A JP21562892 A JP 21562892A JP 21562892 A JP21562892 A JP 21562892A JP H0641950 A JPH0641950 A JP H0641950A
- Authority
- JP
- Japan
- Prior art keywords
- box
- rectangular
- improved
- shaped casing
- 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.)
- Pending
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は土木、建築工事における
構造物基礎の地盤改良のための多軸地盤改良機に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-axis ground improvement machine for ground improvement of a structural foundation in civil engineering and construction work.
【０００２】[0002]
【従来の技術】従来の構造物基礎の地盤改良には図５に
示す円形改良柱による場合と図６に示す長方形改良柱に
よる場合とがあった。円形改良柱による場合には、軸体
下端に掘削翼と固化材の噴出口が設けられ、その上方に
複数段の攪拌翼が設けられた単軸の改良軸を有する地盤
改良機で図５に示す如く改良柱１を施工し、隣接した改
良柱１の一部を互いに重複３させて施工するか、または
前記単軸を２軸以上並設した多軸の地盤改良機で、図５
に示す如く構造物基礎の地盤改良を行っていた。2. Description of the Related Art Conventional ground improvement of a structure foundation has been carried out by using a circular improved column shown in FIG. 5 or a rectangular improved column shown in FIG. In the case of using the circular improvement column, the ground improvement machine having a uniaxial improvement shaft provided with an excavation blade and a jet of solidifying material at the lower end of the shaft body, and a plurality of stages of stirring blades provided above it are shown in FIG. As shown in FIG. 5, the improved pillars 1 are installed, and the adjacent improved pillars 1 are partly overlapped with each other 3 or by a multi-axis ground improvement machine in which two or more single shafts are arranged side by side.
As shown in, the ground of the structure foundation was improved.
【０００３】また、長方形改良柱による場合には、図
７、図８に示すように、掘削時には軸体１０、２０先端
の掘削翼１１、２１により掘削しつつ、先端の噴出口１
２、２２より固化材を吐出して土砂と固化材を撹拌し、
ボックス型ケーシング３０により、土砂を長方形に崩
し、引抜き時には上部の噴出口１３、２３より固化材を
吐出しつつ、土砂と固化材を撹拌し、ボックス型ケーシ
ング３０により土砂を長方形に整形して長方形改良柱を
施工し、図６に示すように長方形改良柱２を互いに隣接
せしめて構造物基礎の地盤改良を行っていた。Further, in the case of using the rectangular improved column, as shown in FIGS. 7 and 8, at the time of excavation, while excavating by the excavation blades 11 and 21 at the tips of the shafts 10 and 20, the jet nozzle 1 at the tip is formed.
The solidifying material is discharged from Nos. 2 and 22 to stir the sand and the solidifying material,
The box-shaped casing 30 collapses the earth and sand into a rectangular shape, and at the time of extraction, the solidified material is discharged from the upper ejection ports 13 and 23 while stirring the earth and sand and the solidified material, and the box-shaped casing 30 shapes the earth and sand into a rectangular shape to form a rectangular shape. The improved columns were constructed, and the rectangular improved columns 2 were adjacent to each other as shown in FIG. 6 to improve the ground of the structure foundation.
【０００４】また、他の長方形改良柱を施工する地盤改
良機による場合には、図９、１０に示すように、一対の
改良軸４０、５０に垂直撹拌翼４２ｂ、５２ｂとギヤボ
ックス４２ａ、５２ａとから成る垂直撹拌装置４２、５
２を装着した地盤改良機を用いていた。Further, in the case of a ground improvement machine for constructing another rectangular improvement column, as shown in FIGS. 9 and 10, a pair of improvement shafts 40 and 50 are provided with vertical stirring blades 42b and 52b and gear boxes 42a and 52a. Vertical stirrer 42, 5 consisting of
The ground improvement machine equipped with 2 was used.
【０００５】なお、垂直撹拌装置４２、５２は軸体４
１、５１の水平回転をギヤボックス４２ａ、５２ａで垂
直回転に変換することで駆動される。以上の構造によ
り、軸体４２、５２の水平回転による一部重複した眼鏡
形断面４と前記垂直撹拌装置４２、５２による一対の細
長い長方形断面５ａ、５ｂ（ハッチングで示す）とによ
る長方形改良柱が形成された。The vertical stirring devices 42 and 52 are the shaft 4
It is driven by converting the horizontal rotation of 1, 51 into vertical rotation by the gear boxes 42a, 52a. With the above-described structure, a rectangular improved column is formed by the spectacle-shaped cross section 4 partially overlapped by the horizontal rotation of the shafts 42 and 52 and the pair of elongated rectangular cross sections 5a and 5b (shown by hatching) by the vertical stirring devices 42 and 52. Been formed.
【０００６】上述した地盤改良機を用いて図６に示すよ
うに長方形改良柱２を隣接せしめて構造物基礎の地盤改
良を行っていた。Using the above-mentioned ground improvement machine, as shown in FIG. 6, the rectangular improvement pillars 2 are arranged adjacent to each other to improve the ground of the structure foundation.
【０００７】[0007]
【発明が解決しようとする課題】しかるに、前記単軸ま
たは複軸による地盤改良機による円形改良柱１の場合
は、面積的に１００％の改良を行うことが困難であっ
た。円形改良柱１を一部重複させるため、円形の改良柱
１間に図５にハッチングで示すような未改良部６が残
る。この未改良部６をなくすためには、重複距離（ラッ
プ距離）を大きくとる必要があり、既改良柱を大きく削
り取る必要があった。従って、不経済であるばかりでな
く、既改良柱の強度発現が既に完了している場合は、ラ
ップ施工そのものが困難であり、さらに芯ずれ等の施工
不良が発生していた。However, in the case of the circular improved pillar 1 by the single axis or double axis ground improving machine, it is difficult to improve the area 100%. Since the circular improved columns 1 are partially overlapped with each other, an unimproved portion 6 as shown by hatching in FIG. 5 remains between the circular improved columns 1. In order to eliminate the unimproved portion 6, it is necessary to increase the overlap distance (lap distance), and it is necessary to largely scrape off the improved pillar. Therefore, not only is it uneconomical, but when the strength development of the already-improved columns has already been completed, the lap construction itself is difficult, and further construction defects such as misalignment occur.
【０００８】また、図７及び図９に示す長方形の地盤改
良機による場合は、ラップ施工することが困難であるた
め、隣接した長方形改良柱を一体化することができな
い。従って、地震時の水平力を支持することができず、
構造物基礎の地盤改良の役目が果たせなかった。さら
に、図９に示す地盤改良機は掘削機構が複雑であり、故
障し易かった。図７、図８に示す地盤改良機は構造はシ
ンプルであるが、混合撹拌性が悪く、かつラップ施工は
不可能であった。Further, in the case of the rectangular ground improvement machine shown in FIGS. 7 and 9, since it is difficult to lap, adjacent rectangular improvement columns cannot be integrated. Therefore, it is not possible to support the horizontal force during an earthquake,
The role of ground improvement of the structural foundation could not be fulfilled. Furthermore, the ground improvement machine shown in FIG. 9 has a complicated excavation mechanism and is easily broken. Although the ground improvement machine shown in FIGS. 7 and 8 has a simple structure, mixing and stirring properties are poor, and lap construction is impossible.
【０００９】本発明は上述した欠点を改善するためにな
されたもので、ボックス形ケーシングと掘削翼及び撹拌
翼を有する一対の改良軸とで長方形の改良柱を造成する
際に、掘削翼のえがく円の面積の一部が長方形の各辺か
ら弓形にはみ出すように構成し、長方形の改良柱を隣接
施工する際にこの弓形の部分が互いにラップするように
することにより、構造物の基礎を地盤改良する際に未改
良部がないだけでなく、互いにラップした地盤改良を行
うことのできる長方形地盤改良機を提供するものであ
る。The present invention has been made in order to remedy the above-mentioned drawbacks. When the rectangular improved column is constructed by the box-shaped casing and the pair of improved shafts having the excavating blade and the stirring blade, the excavation blade is marked. By constructing part of the area of the circle so that it protrudes from each side of the rectangle in an arc shape, and when the improved rectangular columns are constructed adjacent to each other, the arched parts wrap each other to form the foundation of the structure. (EN) Provided is a rectangular ground improvement machine not only having no unimproved part in improvement but also capable of performing ground improvement wrapping with each other.
【００１０】[0010]
【課題を解決するための手段】本発明は、下縁に切削刃
を有する板で長方形に囲って形成されたボックス形ケー
シングと、該ボックス形ケーシング内側に固設された一
対のボスに回転自在に挿通され、軸体の先端部に掘削翼
及び固化材の吐出口を有し、その上方に位置し、前記ボ
ックス形ケーシングを挿通する部分を除く軸体に複数段
の攪拌翼が固設された一対の改良軸とを具備し、前記長
方形の長辺は短辺の２倍以下で、掘削翼と撹拌翼の直径
は前記短辺より大きく、かつ、軸体の軸心と長方形の角
との距離の２倍より小さいことを特徴とする。SUMMARY OF THE INVENTION According to the present invention, a box-shaped casing formed by enclosing a rectangular shape with a plate having a cutting edge at a lower edge, and a pair of bosses fixed inside the box-shaped casing are rotatable. Has a digging blade and a solidified material discharge port at the tip of the shaft body, and a plurality of stages of stirring blades are fixed to the shaft body located above the drilling blade and the solidifying material, and excluding the portion where the box-shaped casing is inserted. A pair of improved shafts, the long side of the rectangle is not more than twice the short side, the diameter of the excavating blade and the stirring blade is larger than the short side, and the shaft center of the shaft and the corner of the rectangle. Is less than twice the distance of.
【００１１】また本発明は前記軸体のボックス形ケーシ
ング上方にも固化材の吐出口を有することを特徴とす
る。Further, the present invention is characterized in that a discharge port for the solidifying material is also provided above the box-shaped casing of the shaft body.
【００１２】[0012]
【作用】長方形の改良柱を順次隣接して施工すると、長
方形の各辺から弓形にはみ出した部分が互いにラップす
るので、改良された地盤が水平方向の力に対して強くな
る。When the improved rectangular columns are successively arranged adjacent to each other, the portions protruding from the sides of the rectangle in an arcuate shape wrap with each other, so that the improved ground becomes stronger against the horizontal force.
【００１３】[0013]
【実施例】以下添付図に基づいて本発明を詳細に説明す
る。図１は本発明の一実施例を示す正面図、図２は同平
面図、図３は本発明の長方形地盤改良機の一回の施工に
よる改良柱の平面図、図４は本発明の長方形地盤改良機
により施工された構造物基礎の地盤改良のための改良柱
の配置を示す平面図である。The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a plan view of an improved pillar by a single construction of the rectangular ground improvement machine of the present invention, and FIG. 4 is a rectangle of the present invention. It is a top view which shows arrangement | positioning of the improvement pillar for the ground improvement of the structure foundation constructed by the ground improvement machine.
【００１４】[0014]
【実施例】図において１００、２００は改良軸、１１
０、２１０はその掘削翼、１２０、２２０は撹拌翼、３
００はボックス形ケーシング、３１０、３２０はボック
ス形ケーシングに固設されたボスである。改良軸１０
０、２００はボックス形ケーシングのボス３１０、３２
０にその軸体１４０、２４０を回動自在に嵌挿されてい
る。そして、前記軸体１４０、２４０には先端に掘削翼
１１０、２１０が固設されると共に、固化材の吐出口１
３１、２３１が設けられており、その上方には複数の撹
拌翼１２０、２２０が固設されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawing, 100 and 200 are improved shafts, 11
0 and 210 are the excavating blades, 120 and 220 are stirring blades, and 3
00 is a box-shaped casing, and 310 and 320 are bosses fixed to the box-shaped casing. Improved shaft 10
0 and 200 are box-shaped casing bosses 310 and 32.
The shafts 140 and 240 are rotatably fitted in the shaft 0. The shafts 140 and 240 have the excavation blades 110 and 210 fixed to the tips thereof, and the solidified material discharge port 1
31 and 231 are provided, and a plurality of stirring blades 120 and 220 are fixedly provided above them.
【００１５】ただし、ボックス形ケーシング３００上方
の軸体１４０、２４０にも吐出口１３２、２３２を設け
ても良い。前記ボックス形ケーシング３００と掘削翼１
１０、２１０との大きさの関係は下記のようになってい
る。長方形の長辺Ｌ2は短辺Ｌ1の２倍より小さい。ま
た、掘削翼１１０、２１０と撹拌翼１２０、２２０の直
径Ｄは長方形の短辺Ｌ1より大きく、軸体１４０、２４
０の軸心０、０と長方形の角との距離Ｍの２倍以下であ
る。However, the outlets 132, 232 may be provided in the shafts 140, 240 above the box-shaped casing 300. The box-shaped casing 300 and the excavation blade 1
The size relationship with 10, 210 is as follows. The long side L 2 of the rectangle is smaller than twice the short side L 1 . The diameter D of the excavating blades 110, 210 and the stirring blades 120, 220 is larger than the short side L 1 of the rectangle, and the shafts 140, 24
It is not more than twice the distance M between the axis 0, 0 of 0 and the corner of the rectangle.
【００１６】本発明の長方形地盤改良機で構造物基礎の
地盤改良をするには、掘削時には軸体１４０、２４０先
端の掘削翼１１０、２１０により地盤を掘削しつつ、先
端の吐出口１３１、２３１より固化材を吐出して土砂と
固化材を撹拌し、ボックス形ケーシング３００により、
土砂を長方形に崩し、引抜き時には上方の吐出口１３
２、２３２から固化材を吐出せずに撹拌のみをするか、
または、上方の吐出口１３２、２３２から固化材を吐出
しつつ、土砂と固化材とを撹拌するかして、ボックス形
ケーシング３００により土砂を長方形に整形して図３に
示すように長方形改良柱を施工する。眼鏡状の改良柱４
１０を施工する際、固化材は隅部４２０の土砂とも混合
され長方形改良柱４００ができる。In order to improve the ground of the structure foundation with the rectangular ground improving machine of the present invention, the excavation blades 110 and 210 at the tips of the shafts 140 and 240 are used to excavate the ground at the time of excavation, and the discharge ports 131 and 231 at the tips are provided. More solidified material is discharged to stir the sand and solidified material, and the box-shaped casing 300
Break the earth and sand into a rectangle, and when pulling out, the upper discharge port 13
Do not stir the solidified material from 2, 232 or just stir it,
Alternatively, while the solidified material is discharged from the upper discharge ports 132 and 232, the sand and the solidified material are agitated, and the box-shaped casing 300 shapes the sand and sand into a rectangular shape to improve the rectangular shape as shown in FIG. Construct. Glass-shaped improved pillar 4
When 10 is installed, the solidified material is mixed with the earth and sand in the corner 420 to form the rectangular improved column 400.
【００１７】そして、前記長方形地盤改良機を用いて構
造物基礎の地盤を改良するには、例えば図４に示すよう
に、長方形改良柱４００をＡ→Ｂ→Ｃの順で隣接して施
工すると、長方形の各辺からはみ出た弓状部４３０は互
にラップする。In order to improve the ground of the structure foundation using the rectangular ground improvement machine, for example, as shown in FIG. 4, rectangular improvement columns 400 are installed adjacent to each other in the order of A → B → C. , The arcuate portions 430 protruding from the respective sides of the rectangle overlap each other.
【００１８】ただし、Ａ→Ｃ→Ｂの順で施工しても良
い。However, the construction may be carried out in the order of A → C → B.
【００１９】[0019]
【発明の効果】以上説明した本発明によれば、下記のよ
うな効果を奏する。 地盤の１００％全面改良ができるだけでなく、改良
柱どうしのラップ施工が容易にできるので、改良地盤の
強度が大きく、かつ地震時の水平力に対して抵抗力があ
る。According to the present invention described above, the following effects can be obtained. Not only 100% full improvement of the ground is possible, but also lap construction between the improved columns can be done easily, so the improved ground is strong and resistant to horizontal forces during an earthquake.
【００２０】 図９に示す垂直撹拌装置を有するタイ
プに比べ掘削機構が簡単である。The excavation mechanism is simpler than the type having the vertical stirring device shown in FIG.
【図１】本発明の一実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of the present invention.
【図２】本発明の一実施例を示す平面図である。FIG. 2 is a plan view showing an embodiment of the present invention.
【図３】本発明の長方形地盤改良機の一回の施工による
改良柱の平面図である。FIG. 3 is a plan view of an improved pillar by a single construction of the rectangular ground improvement machine of the present invention.
【図４】本発明の長方形地盤改良機により施工された構
造物基礎の地盤改良のための改良柱の平面図である。FIG. 4 is a plan view of an improved pillar for ground improvement of a structure foundation constructed by the rectangular ground improvement machine of the present invention.
【図５】従来の円形改良柱による基礎地盤の改良柱配置
図である。FIG. 5 is a layout diagram of improved columns of foundation ground by conventional circular improved columns.
【図６】従来の長方形改良柱による基礎地盤の改良柱配
置図である。FIG. 6 is a layout view of improved columns of the foundation ground by the conventional rectangular improved columns.
【図７】従来のボックス形ケーシングを有する地盤改良
機の正面図である。FIG. 7 is a front view of a ground improvement machine having a conventional box-shaped casing.
【図８】従来のボックス形ケーシングを有する地盤改良
機の平面図である。FIG. 8 is a plan view of a ground improvement machine having a conventional box-shaped casing.
【図９】従来の垂直撹拌装置を装着した地盤改良機の正
面図である。FIG. 9 is a front view of a ground improvement machine equipped with a conventional vertical stirring device.
【図１０】従来の垂直撹拌装置を装着した地盤改良機で
施工した改良柱の平面図である。FIG. 10 is a plan view of an improved column constructed by a ground improvement machine equipped with a conventional vertical stirring device.
１００、２００ 改良軸 １１０、２１０ 掘削翼 １２０、２２０ 撹拌翼 １３１、１３２、２３１、２３２ 吐出口 １４０、２４０ 軸体 ３００ ボックス形ケーシング ３１０、３２０ ボス ４００ 長方形改良柱 ４１０ 眼鏡状改良柱 ４２０ 隅部 ４３０ 弓状部 Ｌ1 短辺 Ｌ2 長辺 Ｄ 直径 Ｍ 軸心と長方形の角との距離100, 200 Improved shaft 110, 210 Excavation blade 120, 220 Stirring blade 131, 132, 231, 232 Discharge port 140, 240 Shaft body 300 Box type casing 310, 320 Boss 400 Rectangular improved column 410 Eyeglass improved column 420 Corner 430 Bow L 1 Short side L 2 Long side D Diameter M Distance between axis and rectangle corner
Claims (2)
て形成されたボックス形ケーシングと、 該ボックス形ケーシング内側に固設された一対のボスに
回転自在に挿通され、軸体の先端部に掘削翼及び固化材
の吐出口を有し、その上方に位置し、前記ボックス形ケ
ーシングを挿通する部分を除く軸体に複数段の攪拌翼が
固設された一対の改良軸とを具備し、 前記長方形の長辺は短辺の２倍以下で、掘削翼と撹拌翼
の直径は前記短辺より大きく、かつ、軸体の軸心と長方
形の角との距離の２倍より小さいことを特徴とする長方
形地盤改良機。1. A box-shaped casing formed in a rectangular shape by a plate having a cutting edge at a lower edge thereof, and a pair of bosses fixedly mounted inside the box-shaped casing, the boss being rotatably inserted, and a tip of a shaft body. And a pair of improved shafts having a plurality of stages of stirring blades fixedly mounted on the shaft body excluding the portion through which the box-shaped casing is inserted. However, the long side of the rectangle is less than twice the short side, the diameter of the excavating blade and the stirring blade is larger than the short side, and smaller than twice the distance between the shaft center of the shaft and the corner of the rectangle. Rectangular ground improvement machine characterized by.
も固化材の吐出口を有することを特徴とする請求項１記
載の長方形地盤改良機。2. The rectangular ground improvement machine according to claim 1, further comprising a solidified material discharge port above the box-shaped casing of the shaft body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21562892A JPH0641950A (en) | 1992-07-21 | 1992-07-21 | Rectangular foundation improving machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21562892A JPH0641950A (en) | 1992-07-21 | 1992-07-21 | Rectangular foundation improving machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0641950A true JPH0641950A (en) | 1994-02-15 |
Family
ID=16675555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21562892A Pending JPH0641950A (en) | 1992-07-21 | 1992-07-21 | Rectangular foundation improving machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0641950A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102479A (en) * | 1996-10-02 | 1998-04-21 | Daisho Shinki Kk | Ground stabilization method |
| JP2016191259A (en) * | 2015-03-31 | 2016-11-10 | 日本海工株式会社 | Ground improvement device, ground improvement method, casing pipe, excavation device |
-
1992
- 1992-07-21 JP JP21562892A patent/JPH0641950A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102479A (en) * | 1996-10-02 | 1998-04-21 | Daisho Shinki Kk | Ground stabilization method |
| JP2016191259A (en) * | 2015-03-31 | 2016-11-10 | 日本海工株式会社 | Ground improvement device, ground improvement method, casing pipe, excavation device |
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