JPH02197616A - Double rotary ring drill head and rolled-fill wall column - Google Patents
Double rotary ring drill head and rolled-fill wall columnInfo
- Publication number
- JPH02197616A JPH02197616A JP1503589A JP1503589A JPH02197616A JP H02197616 A JPH02197616 A JP H02197616A JP 1503589 A JP1503589 A JP 1503589A JP 1503589 A JP1503589 A JP 1503589A JP H02197616 A JPH02197616 A JP H02197616A
- Authority
- JP
- Japan
- Prior art keywords
- double
- main shaft
- wheel
- drilling head
- blade
- 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
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000005553 drilling Methods 0.000 claims description 25
- 238000005096 rolling process Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002689 soil Substances 0.000 abstract description 19
- 238000009412 basement excavation Methods 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 8
- 238000005056 compaction Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 4
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 21
- 238000007711 solidification Methods 0.000 description 10
- 230000008023 solidification Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000013019 agitation Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000011362 coarse particle Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明は築構造物のための場所打ちくいあるいは土じ
ようと固化材を混合して成る地盤改良性用の掘削穿孔ヘ
ッドとそれによって施工された基礎柱体に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an excavation perforation head for ground improvement, which is made of a mixture of pour-in-place piles or soil plaster and a solidification material for built structures, and a construction using the head. Regarding the foundation columns that have been constructed.
(従来の技術)
この種のものとしては(イ)特公昭58−29374号
と(ロ)特開昭62−242013号及び(ハ)両文献
で従来技術として示されるものがあシ用いられていた。(Prior art) As for this type of technology, (a) Japanese Patent Publication No. 58-29374, (b) Japanese Patent Application Laid-Open No. 62-242013, and (c) those shown as prior art in both documents are used. Ta.
(発明が解決しようとする問題点)
しかしこれらで述べられるように(ハ)はヘッド最先の
掘削翼はかくはん翼をかねるから土じようと共回りして
掘削及び固化材との混合効率が低く構造複雑9重量が嵩
み保守上の問題も多い、(ロ)はまだこの問題を残して
いてその歯車箱がかくはん領域に位置しその発効率が低
下する。(Problems to be solved by the invention) However, as stated above, (c) is that the cutting blade at the tip of the head also serves as a stirring blade, so it rotates together with the soil pouring, reducing the mixing efficiency with the digging and solidifying material. It is low in structure and has a complicated structure.9 It is heavy and has many maintenance problems. (B) still has this problem, and its gear box is located in the agitation area, reducing its efficiency.
(イ)は共回り防止翼の両端が孔壁を削り降下するから
孔壁をいため、それに障害物があたると更に孔壁を乱し
ロッドが偏り不正円穿孔を誘発し施工が困難となる、特
に重要なことはこれらのかくはんは総じて軸回りに土じ
ようの移動を行うのみの回転かくはんであって軸中心側
から孔壁側方向又はその逆の混合物の移動を伴わないか
くはんでありしかも孔壁を強化する手段のないものであ
った。場所打ちくいにあってはネガテ1ブフリクション
を軽減すべく滑らかな孔壁を、また地盤改良のための固
化柱体としては効果的な摩擦面を備え周囲の地盤と一体
化するものが望まれていた。In (a), both ends of the co-rotation prevention blade scrape down the hole wall, damaging the hole wall, and when an obstacle hits it, it further disturbs the hole wall, causing the rod to become biased and causing irregular drilling, making construction difficult. What is particularly important is that these types of agitation are generally rotational agitation that only moves the soil around the shaft, and do not involve movement of the mixture from the center of the shaft toward the hole wall or vice versa. There was no way to strengthen the walls. When drilling in place, it is desirable to have a smooth hole wall to reduce negative friction, and as a solidification column for ground improvement, it is desirable to have an effective friction surface and integrate it with the surrounding ground. was.
(問題点を解決するための手段)
掘削降下に伴って自転、公転する転輪によって固化材等
を孔壁に圧着、充填して所望の面を備える強化された孔
壁を形成し小障害物は孔壁に埋め込み混合物を中心側と
孔壁側の間にも移動かくはんする求心性を有する穿孔ヘ
ッドと、それによる転圧壁柱体によって解決する。(Means for solving the problem) Solidifying material, etc. is compressed and filled into the hole wall by the rolling wheels that rotate and revolve as the excavation descends, forming a reinforced hole wall with a desired surface and eliminating small obstacles. This problem is solved by a drilling head that is embedded in the hole wall and has a centripetal property that moves and stirs the mixture between the center side and the hole wall side, and a rolling wall column formed by the drilling head.
(作用)
従来の中心軸での周方向の回転かくはんのみでは、その
遠心分離作用によって掘削土じよう粒塊の粗なものが孔
壁面側に密なるものが中央側位置に、同比重においては
重質なものが孔壁側、軽質なものが中央側に偏る、共同
シ防止翼前縁側には粗粒塊が塞き止められ、後縁側には
軽質なもの・液状のものが多く集まる等、固化材と土し
ようが不均一に分布する地盤改良固化柱体が出来てしま
うっ以下添付図面を基に説明します、孔内における転輪
は自転、公転し支軸10で回転する転輪1のかくはん翼
群5−5の任意の一翼端の軌跡は内サクロイド曲線を描
き理想的な混合かくはんが行なわれ均一な固化柱体が実
現する。詳しくは固化材をその転動作用で孔壁の土じよ
うに圧着・埋入しつき固める転輪は同時に上記かくはん
翼群の車としても作用する。これが回転するのは転圧作
用を行ない、転輪が小歯車となシ孔内壁面を内歯車とす
べく転造刻設作用を行なう走行車輪の働きである歯車効
果によって壁面とかみ合う。主軸2と一体で回転する翼
4がポンプ翼、軸受20a・20bで回転自在の担枠6
がタービン翼、流体が固化材と土じようあるいは泥水等
の孔内被かくはん物で構成された流体継手に依って担枠
6は主軸回転方向にすべりを有して従動回転し、孔内物
をかくはんすると共に以下の回転に加勢する。主軸2に
はトルク制御手段8を介して太陽歯車9が組み立てられ
その歯車が直接相手歯車をかねる遊星運動をする転輪1
のかくはん翼群外周にかみ合うことで孔壁とかみ合う転
輪が駆動されて担枠6は主軸の回転に対し順方向に減速
回転する。無理のない精確な穿孔のためには担枠の軸受
20を孔心に保つことを要し、そのためには最少3個以
上の転輪を担枠に等配設することを要する。混合土じよ
うの落下を容易にするため担枠の上部30aは外周に向
って下り勾配に成っている、一方下部301)はかくは
ん翼群から相対視して停止していて、これに対する共回
り防止翼として作用し、太陽歯車はかくはん翼群の翼間
架橋を突き崩す役目もする。この穿孔ヘッドで施工中障
害物との干渉があると、孔壁−転輪とかみ合う太陽歯車
は主軸回転方向に増速回転するがトルク制御手段8が例
えば駆動方向に接であシ逆方向にフリーの一方クラッチ
であれば、それに依って過回転は逃がされこの装置は保
護される。第1図第2図に示すように地表にて給油され
たこのヘッドの軸受等は降下にともない地中にて土じよ
う、固化材・泥水等孔内混合物の圧力を受けるが、やや
内圧を高めにする作用面積のバランスピストンBでこの
圧力を受て潤滑する。(Function) With conventional rotational stirring only in the circumferential direction around the central axis, due to the centrifugal separation effect, the coarse particles of the excavated soil particles become denser on the hole wall side, and the ones that are denser on the hole wall side are placed in the center position, and the ones with the same specific gravity are Heavy materials are concentrated on the hole wall side, light materials are concentrated on the center side, coarse particles are blocked on the leading edge side of the joint prevention blade, and many light materials and liquid materials gather on the trailing edge side. , a ground improvement solidification column is created in which the solidification material and soil are unevenly distributed.The following is an explanation based on the attached drawings.The rolling wheels in the hole rotate on their own axis, revolve around the axis 10, and rotate around the spindle 10. The locus of any one blade tip of the first stirring blade group 5-5 draws an endosacroid curve, and ideal mixing and stirring is performed to realize a uniform solidified column. More specifically, the rollers that press and embed the solidifying material into the hole wall like soil through its rolling action also act as wheels for the agitating blade group. This rotates by performing a rolling action, and the rolling wheels act as small gears, and the inner wall surface of the hole engages with the wall surface by a gear effect, which is the function of a running wheel that performs a rolling and engraving action so that the inner wall surface of the hole becomes an internal gear. The blades 4 that rotate together with the main shaft 2 are pump blades, and the carrier frame 6 is rotatable with bearings 20a and 20b.
The carrier frame 6 rotates with a slip in the direction of rotation of the main shaft due to the fluid coupling, in which the fluid is made up of solidified material and materials to be agitated in the hole, such as soil or muddy water, and the material in the hole is agitated. At the same time as stirring it, it also assists in the following rotation. A sun gear 9 is assembled on the main shaft 2 via a torque control means 8, and this gear directly serves as a mating gear.Rolling wheels 1 perform planetary motion.
By engaging with the outer periphery of the agitation blade group, a roller that engages with the hole wall is driven, and the carrier frame 6 rotates at a reduced speed in the forward direction relative to the rotation of the main shaft. In order to drill holes accurately and reasonably, it is necessary to keep the bearing 20 of the carrier frame in the center of the hole, and for this purpose it is necessary to arrange at least three or more rollers equally on the carrier frame. In order to facilitate the fall of the mixed soil, the upper part 30a of the carrier frame is sloped downward toward the outer periphery, while the lower part 301) is stationary relative to the stirring blade group, and the co-rotation with respect to this is made. Acting as a prevention wing, the sun gear also serves to break down the interwing bridge of the stirring wing group. If this drilling head interferes with an obstacle during construction, the sun gear that meshes with the hole wall and the roller rotates at an increased speed in the rotational direction of the main shaft, but the torque control means 8 is in contact with the driving direction, for example, and rotates in the opposite direction. If the one-way clutch is free, overspeed will be released and this device will be protected. As shown in Figure 1 and Figure 2, the bearings of this head, which are lubricated on the ground surface, are subjected to the pressure of soil, solidification material, muddy water, and other mixtures in the hole as they descend, but the internal pressure is slightly reduced. The balance piston B, which has a higher active area, receives this pressure and lubricates it.
(実施例)
地盤改良固化柱体の施工例として第1図に示すように駆
動装置Mは図示しないリーダーに取り付けられ、穿孔ヘ
ッドDを回転降下させる機能と、図示しない固化付計量
送出装置とホースで接続される固化付注入口Pと回転継
手を含み、送出される固化材をロッドRを経由して管状
の主軸2内を疎通させ噴出口Hから地中に吐出すべく成
っているっこの装置に例えばポルトランドセメントある
いはこれが主材の地盤安定材等の粉末固化材と水との定
温合液である液状の固化材を供給し噴出口Hから吐出さ
せつつ、穿孔ヘッドを右回転で降下させると先端にある
右回転で正のすくい角θの付与された転圧式を見込んで
小さめの径の(第2図も参照)掘削翼7が地盤を掘削ま
き立てて、そこにある土じようと固化材が作用で述べる
合理的なかくはんに依って混練され、その混合物は転輪
1al・1a2・ja3によって(第3図も参照)孔壁
に圧着、埋入、充填が繰り返えされる転圧が成され孔壁
は強化され壁殻Wを形成する。これの表面は土質と転輪
の孔壁対応面に関係し、この例では凹凸面、後述の千輪
6付のものでは内側平滑面となる。計画深度に達した後
そのままの回転で引き上げるも良いが、逆回転して固化
付混合土じようを掘削翼の裏面がすくい角に依って圧密
に働くことで圧密しながら、この装置が土じようから押
し上げられる力に抗しつつ引き上げ一往体の施工を終了
するのである。かくはん翼の翼端による孔壁転圧は土質
、障害物等の関係で必ずしも規則的な内歯車の転造刻設
が行なわれないのであって、ずれた不規則刻みの転圧に
よって孔壁に均一かつ充分に固化材が充填される。第1
図はやや規則的に刻まれたものを示し完成時にはロンド
穴は残らない。孔壁の崩壊防止材として石灰、ベントナ
イト、応力緩和セメント等を混合した泥水を注入、満た
してサンドポンプで排水しながら掘削穿孔し鉄筋を挿入
、コンクリートを水中打設して場所打ちくいが施工でき
る、第4図と第5図に示すものはこの目的のために転輪
のかくはん翼翼端より大径の子軸6を設け、これによっ
て孔壁を転圧するようにしたものであり太陽歯車9bは
トルク制御手段を介すること無く掘削翼ボスと共に主軸
2と一体化している。このことは過大な力が作用した時
に転輪1bと孔壁との間でスリップすることで装置全体
が保護されるべく選らばれた周面形状を備える子軸6が
有るからである。ラウンドであるこの子軸の形状を文字
通り平にすること、テーパーとすること、これらの組み
合わせ形状とすることはかまわない。他の実施例として
は転輪。(Example) As shown in Fig. 1 as an example of construction of a soil improvement solidification column, a drive device M is attached to a leader (not shown), and has a function of rotating and lowering a drilling head D, a metering and sending device with solidification (not shown), and a hose. This includes a solidification inlet P and a rotary joint connected to each other, and is designed to communicate the solidified material sent out through the tubular main shaft 2 via the rod R and discharge it into the ground from the spout H. A liquid solidifying material, which is a constant temperature mixture of a powder solidifying material such as Portland cement or a ground stabilizing material mainly composed of Portland cement, and water is supplied to the device, and while it is discharged from the spout H, the drilling head is lowered by rotating clockwise. The excavation blade 7, which has a smaller diameter (see also Figure 2) and rotates clockwise at the tip with a positive rake angle θ, excavates the ground and removes the dirt there. The solidified material is kneaded by the rational stirring described in the action section, and the mixture is repeatedly pressed, embedded, and filled into the hole wall by rolling wheels 1al, 1a2, and ja3 (see also Figure 3). The hole wall is strengthened to form a wall shell W. The surface of this is related to the soil quality and the surface corresponding to the hole wall of the wheel, and in this example it is an uneven surface, and in the case of the one with a thousand wheels 6 described later, it is a smooth inner surface. After reaching the planned depth, it may be possible to pull up the soil by rotating it as it is, but by rotating it in the opposite direction, the back surface of the excavation blade works to consolidate the mixed soil with the rake angle, and this device lifts the soil. They resist the force of pushing up from the ground and pull it up to complete the construction process. Due to the nature of the soil, obstacles, etc., the rolling of the internal gear on the hole wall by the tips of the stirring blades does not necessarily result in regular rolling and engraving of the internal gear, and the rolling and carving of the internal gear is carried out in irregular increments. The solidifying material is filled uniformly and sufficiently. 1st
The figure shows the carvings are somewhat regular, and no rondo holes will remain when completed. As a material to prevent collapse of the hole wall, muddy water mixed with lime, bentonite, stress-relaxing cement, etc. is injected and filled, and the water is drained using a sand pump.The hole is then excavated, reinforcing bars are inserted, and concrete is poured underwater to perform pour-in-place construction. , Fig. 4 and Fig. 5 show a spindle 6 having a larger diameter than the tip of the agitating blade of the wheel for this purpose, which compresses the hole wall, and the sun gear 9b is It is integrated with the main shaft 2 together with the excavating blade boss without using any torque control means. This is because the child shaft 6 has a peripheral surface shape selected so that the entire device is protected by slipping between the wheel 1b and the hole wall when an excessive force is applied. The shape of this child shaft, which is round, may be literally flat, tapered, or a combination thereof. Another example is a rolling wheel.
担枠、翼等を多数段適宜組み、重ね合わせることの他、
同一平面上の数を増減することも良いが、それらの個数
は特に求心性の点から最少3個以上の転輪を壁接させる
ことを要し、担枠と翼の本数、葉数が相互に奇数と偶数
の関係であって、各段の取り付は位相をずらして回転駆
動力の変動を少なくすることが望ましい。この例のよう
に4葉の掘削翼も同様であり土質あるいは装置の軽量化
の都合により3葉とするときは次段との間隙を上下に広
めに取ると良いし、2葉としても上記求心性によりまず
良好な掘削が可能である。各図面で転動体による軸受と
して示される転輪の支軸10及び担枠の上部、下部の集
合部の軸受20aΦ20bを滑り軸受とすること、太陽
歯車9のトルク制御手段8が一方クラッチである場合そ
の駆動力伝達方向に過負荷保護のためトルクIJ 、S
ツタ−を組み込むこと、減速回転が不定となるも軽量化
及び簡素化のために太陽歯車を設けないで流体継手の作
用のみで担枠及び転輪を回転させるもの、かくはん翼5
を数枚置きに部分的又は全体が広巾のものを混在させる
ものも良い。第1図第2図に示す穿孔ヘッドは土じよう
固化打圧、泥水圧によってバランスピストンBが押され
て自動的に給油が成され、減少した潤滑油を補給するに
は、例えばグリスニップルである補給口Fからグリスポ
ンプでバランスピストンが上限に至るまで給油する、こ
の油溜0とバランスピストンの関係をダイアフラムある
いは隔膜によるものとしても良く、バランスピストンを
ゴムブーツで被うこと、外側から押す様にスプリングで
付勢することも望ましく、主軸から見て運動側、固定側
の別なく軸受とともに地中に降下する場所に設ければ良
い、またこの給油方式は油潤滑軸受を有する他の形式の
穿孔ヘッドにも実施出来る。In addition to appropriately assembling and overlapping multiple frames, wings, etc.,
It is also possible to increase or decrease the number of wheels on the same plane, but from the viewpoint of centripetality, it is necessary to have at least three or more rollers in contact with the wall, and the number of carrier frames, wings, and leaves must be mutually consistent. The relationship between odd and even numbers is desirable, and it is desirable that the mounting of each stage be shifted in phase to reduce fluctuations in the rotational driving force. The same is true for four-leaf excavation blades as in this example, and when using three-leaf excavation blades due to soil quality or equipment weight reduction, it is better to make the gap with the next stage wider vertically, and even for two-leaf excavation blades, it is better to make a wider gap above and below. First of all, good excavation is possible due to the core nature. In the case where the support shaft 10 of the roller and the bearings 20aΦ20b of the upper and lower gathering parts of the carrier frame, which are shown as bearings by rolling elements in each drawing, are sliding bearings, and the torque control means 8 of the sun gear 9 is a one-way clutch. Torque IJ, S is applied in the driving force transmission direction for overload protection.
Incorporating a vine, rotating the carrier frame and wheels only by the action of the fluid coupling without installing a sun gear for weight reduction and simplicity, although the deceleration rotation becomes unstable, stirring blade 5
It is also good to have a mixture of partially or entirely wide sheets every few sheets. The drilling head shown in Fig. 1 and Fig. 2 is automatically supplied with oil by pushing the balance piston B by the soil solidification hammering force and the mud water pressure.In order to replenish the lubricating oil that has decreased, for example, a grease nipple is used. The balance piston is supplied with oil until it reaches its upper limit from a certain replenishment port F with a grease pump.The relationship between this oil reservoir 0 and the balance piston may be established by a diaphragm or diaphragm.The balance piston may be covered with a rubber boot, or it may be pushed from the outside. It is also desirable to bias the bearing with a spring, and it can be installed at a location that descends into the ground with the bearing, regardless of whether it is on the moving side or the stationary side when viewed from the main shaft.This lubricating method also applies to other types of oil-lubricated bearings. It can also be performed on a drilling head.
(発明の効果〕
以上の構造であるから施工に即し、求心性を有しそのこ
とが直進性も向上させ、従来から十分な混合とされる周
方向のみのかくはんよりも更に進歩した遊星運動するか
くはん翼群のかくはん混合は優れた混線効果があり従来
のものに有りがちな遠心分離作用が無く、太陽歯車と転
輪との間ではクラッシャーロールの作用もあって土じよ
う粗粒を圧砕する効果もある。これらのことが孔壁を転
圧強化して崩壊しにくい壁殻を形成することと同時に成
され、かつ一方クラッチ、及びトルクIJ ミツターあ
るいは過負荷でスリップする平輪による本発明穿孔ヘッ
ドとロッド、駆動装置の保護下で施工でき、孔内混合物
の圧力で自動的に異物の侵入を防いで軸受に給油される
等保守上の効果もある。かくして施工された固化柱体は
転圧により形成された地盤と良く圧着している摩擦面で
ある壁殻によって全周囲をもって地盤と接触するから地
盤の改良柱としては最も優れたものと言える。場所打ち
ぐいとしては応力緩和と滑材として働くベントナイト等
の圧着した平滑面で外周を接触するので地盤の圧密沈下
によってくいが引き下げられない効果と、孔壁の崩壊が
ないので正確な断面の強度のあるくいが得られる。(Effects of the invention) The above structure is suitable for construction, has centripetal properties, which also improves straightness, and is a planetary movement that is more advanced than the conventional agitation only in the circumferential direction, which is thought to provide sufficient mixing. The stirring and mixing of the blades has an excellent crosstalk effect, and there is no centrifugal separation effect that is common with conventional ones, and there is also the action of a crusher roll between the sun gear and the wheel, which crushes the coarse particles of soil. These effects are achieved at the same time as strengthening the hole wall by compaction and forming a wall shell that is difficult to collapse. The drilling can be performed while the drilling head, rod, and driving device are protected, and the pressure of the mixture inside the hole automatically prevents foreign matter from entering and provides maintenance benefits such as lubricating the bearings.The solidified column body thus constructed is It can be said to be the best pillar for improving the ground because it is in contact with the ground around the entire circumference due to the wall shell, which is a friction surface that is well pressed against the ground formed by compaction. Since the outer periphery is in contact with a smooth surface crimped with bentonite, etc., which acts as a material, the pile is prevented from being pulled down by consolidation subsidence of the ground, and since the hole wall does not collapse, a strong pile with an accurate cross section can be obtained.
第1図は施工例であって地盤を破断し施工中の柱体の上
部を部分的に表わした本発明後転輪穿孔ヘッドの斜視図
であり、
第2図は第1図の複転輪穿孔ヘッドの正面図であって部
分的に左半断面を示し、
第3図は第2図の矢視x−x断面図である。
第4図は第2の実施例である平輪付き転輪による複転輪
穿孔ヘッドの正面図であって部分的に左半断面を示し、
第5図は第4図の矢視Y−Y断面図である。
図中において
1は転輪、 10は支軸、 2は主軸、20aは上部軸
受、 20bは下部軸受、6は担枠、
30aは上部担枠、 60bは下部担枠、4は翼、 5
はかくはん翼、 6は平輪、7は掘削翼S 8はトルク
制御手段、
9は太陽歯車、 Mは駆動装置、 Eは地盤、Pは固化
材注入口、 Rはロッド、Hは噴出口、Bはバランスピ
ストン、 0は油溜、
Fは補給口、 Wは壁殻、 Cは柱体、Dは複転輪穿孔
ヘッド、
をそれぞれ示す。FIG. 1 is a perspective view of the rear roller drilling head of the present invention, which is an example of construction and partially shows the upper part of the pillar body under construction after breaking the ground, and FIG. FIG. 3 is a front view of the drilling head, partially showing a left half section, and FIG. 3 is a sectional view taken along line xx in FIG. 2; FIG. 4 is a front view of a double-wheel drilling head using flat-wheeled rolling wheels according to the second embodiment, partially showing a left half section, and FIG. 5 is a view taken along the arrow Y-Y in FIG. FIG. In the figure, 1 is a rolling wheel, 10 is a support shaft, 2 is a main shaft, 20a is an upper bearing, 20b is a lower bearing, 6 is a carrier frame, 30a is an upper carrier frame, 60b is a lower carrier frame, 4 is a wing, 5
Stirring blade, 6 is flat wheel, 7 is drilling blade S, 8 is torque control means, 9 is sun gear, M is drive device, E is ground, P is solidification material injection port, R is rod, H is spout, B is the balance piston, 0 is the oil sump, F is the supply port, W is the wall shell, C is the column, and D is the double-wheel drilling head.
Claims (1)
次段以昇の主軸に主軸と一体の翼を内包している回転自
在の担枠を備え、その担枠に少なくとも3個以上の壁接
するかくはん翼群である転輪を等配設して成る複転輪穿
孔ヘッド。 2、特許請求の範囲第1項記載の転輪がかくはん翼群の
翼端に平輪を備えるものである複転輪穿孔ヘッド。 3、特許請求の範囲第1項、第2項記載の転輪が主軸に
組み込まれた太陽歯車によつて駆動される複転輪穿孔ヘ
ッド。 4、特許請求の範囲第1項、第2項記載の転輪が主軸に
トルク制御手段を介して組み込まれた、太陽歯車によつ
て駆動される複転輪穿孔ヘッド。 5、油潤滑軸受を備える穿孔ヘッドにおいて地下に降下
する部材に設けられる、ピストン又は隔膜を介して孔内
混合物の圧力を受ける軸受に至る油溜によつて給油する
構造の複転輪穿孔ヘッド。 6、特許請求の範囲第1項から第5項迄に記載する複転
輪穿孔ヘッドにより掘削、孔壁転圧して成る転圧壁柱体
。[Scope of Claims] 1. In a drilling head having a drilling blade at the tip of the hollow main shaft, the main shaft of the next stage or later is provided with a rotatable carrier frame containing a blade integral with the main shaft, and the carrier frame has at least three A double-wheel drilling head consisting of wheels, which are a group of stirring blades that are in contact with a wall, and are evenly arranged. 2. A double-wheel drilling head according to claim 1, wherein the rolling wheel is provided with a flat wheel at the tip of the agitating blade group. 3. A double-wheel drilling head in which the wheels according to claims 1 and 2 are driven by a sun gear incorporated in the main shaft. 4. A double-wheel drilling head driven by a sun gear, in which the wheels according to claims 1 and 2 are incorporated into the main shaft via a torque control means. 5. A double-wheel drilling head equipped with an oil-lubricated bearing, which is provided on a member that descends underground and is lubricated by an oil sump that reaches the bearing that receives the pressure of the mixture in the hole via a piston or diaphragm. 6. A rolling wall pillar body formed by drilling and rolling the hole wall with a double-wheeled drilling head according to claims 1 to 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1503589A JPH02197616A (en) | 1989-01-26 | 1989-01-26 | Double rotary ring drill head and rolled-fill wall column |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1503589A JPH02197616A (en) | 1989-01-26 | 1989-01-26 | Double rotary ring drill head and rolled-fill wall column |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02197616A true JPH02197616A (en) | 1990-08-06 |
Family
ID=11877580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1503589A Pending JPH02197616A (en) | 1989-01-26 | 1989-01-26 | Double rotary ring drill head and rolled-fill wall column |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02197616A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH038920A (en) * | 1989-06-05 | 1991-01-16 | Isamu Tsujino | Excavating and stirring device having radial stirring board rolling hole-wall |
JP2011080201A (en) * | 2009-10-05 | 2011-04-21 | Kyuki Kogyo Kk | Agitating device for soil improvement |
-
1989
- 1989-01-26 JP JP1503589A patent/JPH02197616A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH038920A (en) * | 1989-06-05 | 1991-01-16 | Isamu Tsujino | Excavating and stirring device having radial stirring board rolling hole-wall |
JP2011080201A (en) * | 2009-10-05 | 2011-04-21 | Kyuki Kogyo Kk | Agitating device for soil improvement |
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