JP2850073B2 - Pile frame widening device for cast-in-place concrete piles - Google Patents
Pile frame widening device for cast-in-place concrete pilesInfo
- Publication number
- JP2850073B2 JP2850073B2 JP4126203A JP12620392A JP2850073B2 JP 2850073 B2 JP2850073 B2 JP 2850073B2 JP 4126203 A JP4126203 A JP 4126203A JP 12620392 A JP12620392 A JP 12620392A JP 2850073 B2 JP2850073 B2 JP 2850073B2
- Authority
- JP
- Japan
- Prior art keywords
- pile
- excavation
- widening
- widening device
- bucket
- 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 - Fee Related
Links
Landscapes
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、場所打ちコンクリート
杭の杭躯体拡幅装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for widening a pile body of a cast-in-place concrete pile.
【0002】[0002]
【従来の技術】従来、場所打ちコンクリート杭の支持力
を増大させるために、杭先端部を拡幅する方法が採用さ
れている。拡幅時には、截頭円錐形全体を掘削してお
り、大きなトルクが必要である。この場合、杭躯体部構
成用杭孔を所定の深度まで掘削バケットで掘削し、しか
るのちに拡底掘削専用機械と専用の拡底掘削バケットと
を通常の掘削バケットに取替えて拡幅する。2. Description of the Related Art Hitherto, in order to increase the supporting force of a cast-in-place concrete pile, a method of widening the tip of the pile has been adopted. During widening, the entire frusto-conical shape is excavated, requiring a large torque. In this case, the pile hole for forming the pile frame portion is excavated to a predetermined depth by using an excavation bucket, and thereafter, the widening excavation-dedicated machine and the dedicated expanded bottoming excavation bucket are replaced with a normal excavation bucket to widen the width.
【0003】また拡底掘削バケットには、スタビライザ
ーが取付けられており、このスタビライザーにより拡底
部の掘削精度を求めている。Further, a stabilizer is attached to the bottom-extended excavation bucket, and the stabilizer is used to determine the excavation accuracy of the bottom-extended portion.
【0004】[0004]
【発明が解決しようとする課題】しかしながら杭底部を
拡幅、掘削するには、大きな回転トルクが必要なため、
専用の掘削機械と専用の拡底掘削バケットとが必要であ
り、拡底杭形状も底面積が大きい截頭円錐形に形成され
るので、杭の鉛直方向の変位に対して截頭円錐形部上部
の拘束圧が減少して、杭径が大きくなると、沈下量も増
大する。また掘削形状は専用の拡底用掘削バケットの形
状に左右される。また拡底杭の支持力は拡底部の断面積
のみで決定される。However, widening and excavating the pile bottom requires a large rotating torque.
A dedicated drilling machine and a dedicated bottoming drilling bucket are required, and the bottoming pile is formed in a frusto-conical shape with a large bottom area. As the confining pressure decreases and the pile diameter increases, so does the amount of settlement. The excavation shape depends on the shape of the dedicated bottom-excavation bucket. In addition, the bearing capacity of the expanded pile is determined only by the cross-sectional area of the expanded part.
【0005】本発明は前記の問題点に鑑み提案するもの
であり、その目的とする処は、簡単な構成で作業性を向
上できる上に、場所打ちコンクリート杭の支持耐力を効
果的に増大できて、杭頭での沈下量を制御できる場所打
ちコンクリート杭の杭躯体拡幅装置を提供しようとする
点にある。The present invention has been made in view of the above problems, and has as its object to improve the workability with a simple structure and to effectively increase the bearing capacity of a cast-in-place concrete pile. Therefore, it is an object of the present invention to provide a pile frame widening device for a cast-in-place concrete pile capable of controlling the amount of settlement at the pile head.
【0006】[0006]
【課題を解決するための手段】前記の目的を達成するた
めに、本発明の場所打ちコンクリート杭の杭躯体拡幅装
置は、回転掘削軸の先端部に装着された掘削バケットよ
りも上方の回転掘削軸上部に装着されて掘削バケットの
稼働中はスタビライザとして機能する拡幅装置であっ
て、拡幅装置に、複数のスクレーパーが開閉可能に枢支
されるとともに同各スクレーパーの開閉駆動部材が設け
られ、同各スクレーパーは、上下面の開放された中空状
に形成されるとともに外周面が掘削孔壁に沿って弦月状
に形成されている。In order to achieve the above-mentioned object, a pile body widening device for a cast-in-place concrete pile according to the present invention comprises a rotary excavation above a drill bucket mounted on the tip of a rotary excavation shaft. A widening device mounted on an upper part of the shaft and functioning as a stabilizer during operation of the excavating bucket. The widening device includes a plurality of scrapers pivotally supported so as to be openable and closable, and an opening / closing drive member for each of the scrapers. Each of the scrapers is formed in a hollow shape with open upper and lower surfaces, and has an outer peripheral surface formed in a crescent shape along the wall of the excavation hole.
【0007】[0007]
【作用】本発明の杭躯体拡幅装置は前記のように回転掘
削軸の先端部に装着された掘削バケットよりも上方の回
転掘削軸上部に拡幅装置が装着されており、鉛直掘削時
には、拡幅装置が掘削バケットのスタビライザー機能を
果たして、鉛直掘削精度が高められ、拡幅掘削時には、
掘削バケットが拡幅装置のスタビライザー機能を果たし
て、水平方向の掘削精度が向上する。The widening device of the pile body according to the present invention has the widening device mounted above the rotary digging shaft above the digging bucket mounted on the tip of the rotary digging shaft as described above. Performs the stabilizer function of the excavation bucket, the vertical excavation accuracy is increased, and during widening excavation,
The digging bucket performs the stabilizer function of the widening device, and the digging accuracy in the horizontal direction is improved.
【0008】拡幅掘削時には、拡幅装置のスクレーパー
が開閉駆動部材により開いて、拡幅掘削を行うが、この
とき、スクレーパーの先端部に設けた掘削ビットによ
り、孔壁面に爪跡が残る。この爪跡は、装置全体を逆転
し、掘削面をスクレーバーの弦月状の胴で押圧して、恰
も左官工が左官コテで壁面を押さえすり込むようにする
ことで消して、爪跡の残らない滑らかな掘削面に仕上げ
る。この仕上げにより、掘削面のアーチング作用が向上
して、掘削形状がより一層安定化する。通常、爪跡の残
った孔壁面には、凹凸があり、凹凸があると、土質が剥
落し易く、剥落すると、孔壁の安定が悪くなって、剥落
した土質がスライム発生原因ともなるが、前記のように
スクレーパーの胴で何回も押さえすり込む(練り付け
る)と、剥落が防止され、掘削形状が安定化して、杭の
周面耐力が増大する。なおスクレーパーに正転用と逆転
用とがあれば、正転用のスクレーパーを開いて、その先
端部に設けた掘削ビットにより拡幅掘削しながら、逆転
用のスクレーパーも開けば、前記拡幅掘削と前記爪跡消
去とが同時に行われる。At the time of widening excavation, the scraper of the widening device is opened by the opening / closing drive member to perform widening excavation. At this time, claw marks remain on the hole wall surface due to the excavation bit provided at the tip of the scraper. This claw mark is reversed by turning the whole device in reverse and pressing the excavated surface with the lunar body of the scraper, as if plasterer presses down the wall with a plasterer iron, and erases it, leaving no claw marks remaining smooth Finish on the excavated surface. By this finishing, the arching action of the excavated surface is improved, and the excavated shape is further stabilized. Normally, the hole wall surface where the nail mark remains has irregularities, and if there is irregularity, the soil is easily peeled off, and if peeled off, the stability of the hole wall becomes poor, and the peeled soil becomes a cause of slime generation, When it is pressed down and kneaded (kneaded) many times with the body of the scraper as described above, it is prevented from peeling off, the excavation shape is stabilized, and the peripheral strength of the pile is increased. If the scraper has a forward rotation and a reverse rotation, the forward rotation scraper is opened, and the widening excavation is performed by the drilling bit provided at the tip thereof. And are performed simultaneously.
【0009】また前記スクレーパーは上下端の開放され
た中空状に形成されているため、掘削バケットが掘削孔
内を昇降するとき、従来のアースドリル工法と同じ状態
で施工が可能になる。また拡幅により削り取られた土砂
は、通常、泥水中において浮遊しやすいが、掘削バケッ
ト直上の弦月状のスクレーバーによる掘削では速やかに
直下の掘削バケット内に集積されて、スライムの発生が
防がれる。Since the scraper is formed in a hollow shape with open upper and lower ends, when the drilling bucket moves up and down in the drilling hole, it can be constructed in the same state as the conventional earth drilling method. In addition, earth and sand removed by widening usually floats easily in muddy water, but when digging with a moon-shaped scraper right above the digging bucket, it is quickly accumulated in the digging bucket immediately below, preventing the generation of slime. .
【0010】所定の拡幅が完了すると、拡幅装置のスク
レーバーを閉じて、掘削バケット内の土砂を地上に排出
する。なお柱躯体に次位の節部を構築する場合、前記工
程を反復する。また杭面摩擦抵抗の大きいコルゲート杭
を造成する場合には、前記スクレーパーを波型形状のス
クレーパーと替えればよい。[0010] When the predetermined widening is completed, the scraper of the widening device is closed, and the earth and sand in the excavating bucket is discharged to the ground. In addition, when building the next-order node part in a pillar body, the said process is repeated. When forming a corrugated pile having a large pile surface frictional resistance, the scraper may be replaced with a corrugated scraper.
【0011】[0011]
【実施例】次に本発明の場所打ちコンクリート杭の杭躯
体拡幅装置を図示の実施例により具体的に説明する。A
は回転掘削軸1の先端に装着された掘削バケット、2は
同掘削バケットAの底蓋開閉装置である。同掘削バケッ
トAの上方の回転掘削軸1には、杭躯体の拡幅装置Bが
装着され、同拡幅装置Bの下部は自由回転ジョイント3
を介して掘削バケットAに連結されている。図中Cは油
圧ホースである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings. A
Reference numeral denotes an excavating bucket mounted on the tip of the rotary excavating shaft 1, and reference numeral 2 denotes a bottom cover opening and closing device of the excavating bucket A. On the rotary excavating shaft 1 above the excavating bucket A, a widening device B for pile body is mounted, and a lower part of the widening device B is a free rotary joint 3.
Is connected to the excavating bucket A via C in the figure is a hydraulic hose.
【0012】拡幅装置Bは後述のように拡幅掘削を行う
が、その際、掘削バケットAが拡幅装置Bに対してスタ
ビライザー機能を果す。拡幅装置Bは十文字状の剛強な
枠体B′の各先端部に、正転用及び逆転用のスクレーパ
ー4、4’の基端部がピン5、5′を介して開閉可能に
枢支されている。これらのスクレーパー4、4’は、上
下面の開放された中空状に形成されるとともに外周面が
掘削孔壁に沿って弦月状に形成されている。スクレーパ
ー4、4′の先端部には、掘削ビット4a、4′aが設
けられ、板状の土砂案内板4b、4′bと枠体B′との
間には、正転用の油圧シリンダー6と逆転用の油圧シリ
ンダ6′とが介装されている。これらの油圧シリンダー
6、6′がスクレーパー4、4′の開閉駆動部材に相当
している。The widening device B performs widening excavation as described later. At that time, the excavating bucket A performs a stabilizer function with respect to the widening device B. In the widening device B, the base ends of the forward and reverse scrapers 4, 4 'are pivotally supported at the respective distal ends of a cross-shaped rigid frame B' via pins 5, 5 'so as to be openable and closable. I have. These scrapers 4, 4 'are formed in a hollow shape with open upper and lower surfaces, and the outer peripheral surface is formed in a crescent shape along the wall of the excavation hole. Drilling bits 4a, 4'a are provided at the tips of the scrapers 4, 4 ', and a hydraulic cylinder 6 for normal rotation is provided between the plate-shaped earth and sand guide plates 4b, 4'b and the frame B'. And a hydraulic cylinder 6 'for reverse rotation are interposed. These hydraulic cylinders 6, 6 'correspond to opening and closing driving members of the scrapers 4, 4'.
【0013】図示の実施例は前記のように構成されてい
るので、回転掘削軸1を回転して、掘削バケットAによ
り杭孔を掘削し、同杭孔の掘削中、拡幅装置Bは掘削バ
ケットAに対してスタビライザー機能を果す。また杭躯
体Pの拡幅節部Qを掘削する場合、所定の深度に達した
とき、拡幅装置Bの外枠を構成するスクレーパー4を油
圧シリンダ6′を介してピン5を中心に開き、回転掘削
軸1を逆転して、拡幅節部Qを造成する。Since the illustrated embodiment is constructed as described above, the rotary excavating shaft 1 is rotated to excavate a pile hole by the excavation bucket A, and during the excavation of the pile hole, the widening device B is operated by the excavation bucket. Performs a stabilizer function for A. When the widened joint portion Q of the pile body P is excavated, when a predetermined depth is reached, the scraper 4 constituting the outer frame of the widening device B is opened around the pin 5 via the hydraulic cylinder 6 ', and the rotary excavation is performed. The shaft 1 is reversed to form the widened joint Q.
【0014】なおスクレーパー4、4′は取替可能であ
り、必要な場合には、杭周面に要求される形状に合わせ
て、波状型のスクレーパーと取替えることにより、杭周
面が波型形状をしたコルゲート杭の築造が可能である。
コルゲート杭の施工に当っては、掘削バケットAを逆転
させるか、自由回転ジョイント3を介して深度方向への
掘削を停止させておく。また拡幅節部Qの掘削土砂は、
スクレーパー4、4′の案内板4b、4′bに沿って杭
軸中央に移動しながら下部の掘削バケットA内に集積さ
れる。The scrapers 4, 4 'can be replaced. If necessary, the pile peripheral surface can be replaced by a corrugated scraper in accordance with the shape required for the pile peripheral surface. It is possible to build corrugated piles that have been done.
In the construction of the corrugated pile, the excavation bucket A is reversed or the excavation in the depth direction is stopped via the free rotation joint 3. The excavated earth and sand at the widening section Q is
While moving to the center of the pile axis along the guide plates 4b, 4'b of the scrapers 4, 4 ', they are accumulated in the lower excavation bucket A.
【0015】この掘削バケットA内に集積された土砂は
スクレーパー4、4′を油圧シリンダー6、6′により
閉じて、地上に排出される。拡幅節部を他に造成する場
合には、前記工程を反覆すればよい。また杭躯体Pの底
部を連続した拡幅部とする場合には、掘削バケットAと
拡幅装置Bとを同時に正回転し、最下部で掘削バケット
Aを底浚えバケットと取替えて行うことにより、能率よ
く施工できる。The earth and sand accumulated in the excavating bucket A is discharged to the ground by closing the scrapers 4, 4 'by the hydraulic cylinders 6, 6'. If another widened joint is formed, the above steps may be repeated. When the bottom of the pile body P is a continuous widened portion, the excavating bucket A and the widening device B are simultaneously rotated in the forward direction, and the excavating bucket A is replaced with a bottom dredge at the lowermost part. Can be constructed well.
【0016】この場合の掘削は、掘削バケットAと拡幅
装置Bとが相手側装置のスタビライザーとして機能する
ため、掘削精度が確保される。図5乃至図7は前記場所
打ちコンクリート杭の杭躯体拡幅装置の各種掘削状況を
示している。即ち、図5は杭躯体の掘削状況を示し、回
転掘削軸1は正回転し、掘削刃が非作動状態の拡幅装置
B、掘削バケットAも正回転する。In the excavation in this case, since the excavation bucket A and the widening device B function as a stabilizer of the partner device, excavation accuracy is ensured. 5 to 7 show various excavation situations of the pile body widening device for the cast-in-place concrete pile. That is, FIG. 5 shows a state of excavation of the pile skeleton. The rotary excavation shaft 1 rotates forward, and the widening device B and the excavation bucket A in which the excavation blade is in an inoperative state also rotate forward.
【0017】図6は節杭掘削状況を示し、回転掘削軸
1、作動状態にある拡幅装置Bは逆回転、掘削バケット
Aは逆回転又は静止している。図7は拡幅柱状杭の掘削
状況を示し、回転掘削軸1は正回転、作動中の拡幅装置
Bは正回転、掘削バケットAは正回転する。図8乃至図
14は前記場所打ちコンクリート杭の杭躯体拡幅装置に
より構築された各種の杭を示している。即ち、図8はコ
ルゲート杭、図9はコルゲート杭の底部に拡底部が形成
された杭、図10は杭底部が逆円錐状の引抜専用杭、図
11は拡底杭、図12は節杭、図13は長尺の拡底杭、
図14は杭頭近傍に平盤状の根伽(ねかせ)状部が形成
されたピアー1コラム用杭を示している。FIG. 6 shows a state of excavation of the knot pile, in which the rotary excavating shaft 1, the widening device B in the operating state is reversely rotated, and the excavating bucket A is reversely rotated or stationary. FIG. 7 shows the state of excavation of the widened columnar pile, in which the rotary excavating shaft 1 rotates forward, the operating widening device B rotates forward, and the excavating bucket A rotates forward. FIG. 8 to FIG. 14 show various piles constructed by the pile-widening device for the cast-in-place concrete pile. 8 is a corrugated pile, FIG. 9 is a pile formed with an expanded bottom at the bottom of the corrugated pile, FIG. 10 is a piling dedicated pile having an inverted conical bottom, FIG. 11 is an expanded pile, FIG. FIG. 13 shows a long expanded bottom pile.
FIG. 14 shows a pier 1 column stake in which a flat disk-shaped portion is formed near the pile head.
【0018】なお図示の実施例では掘削バケットAと拡
幅装置Bとが上下に離隔して配設されているが、一体型
にしてもよい。In the illustrated embodiment, the excavating bucket A and the widening device B are vertically separated from each other, but they may be integrated.
【0019】[0019]
【発明の効果】本発明は前記のように回転掘削軸の先端
部に装着された掘削バケットよりも上方の回転掘削軸上
部に拡幅装置が装着されており、鉛直掘削時には、拡幅
装置が掘削バケットのスタビライザー機能を果たし、拡
幅掘削時には、掘削バケットが拡幅装置のスタビライザ
ー機能を果たして、場所打ち杭造成用杭孔を精度よく掘
削できる。拡幅長さは部分掘削になるので、大きな回転
トルクを必要としない。As described above, according to the present invention, the widening device is mounted above the rotary digging shaft above the digging bucket mounted at the tip of the rotary digging shaft. During widening excavation, the excavating bucket performs the stabilizer function of the widening device, so that the pile hole for cast-in-place pile formation can be accurately excavated. Since the widening length is a partial excavation, a large rotating torque is not required.
【0020】また本発明によれば支持耐力の大きい節
杭、コルゲート杭を造成することができ、また杭躯体部
底部を拡幅することにより、杭に拡幅に準じた杭先端耐
力が期待され、且つ杭躯体部の拡幅長さに伴い大きな杭
周面抵抗も期待できる。また杭底部よりも上方で拡幅さ
せることにより、杭底部での上部応力の分散が可能で、
杭頭での沈下量を制御できる。Further, according to the present invention, a knot pile and a corrugated pile having a large bearing strength can be formed, and by expanding the bottom of the pile skeleton, a pile tip strength equivalent to the widening of the pile is expected, and Large pile surface resistance can be expected with the widening of the pile body. Also, by expanding the width above the bottom of the pile, it is possible to disperse the upper stress at the bottom of the pile,
The amount of settlement at the pile head can be controlled.
【0021】また杭躯体の上部を局部拡幅すると杭の上
部構造物による曲げモーメントが杭躯体に及ぼされず、
合理的で経済的な設計ができる。また拡幅装置のスクレ
ーパーを交換すると、拡幅された杭面を波状にしたコル
ゲート杭の築造が可能で、大きな周面摩擦力が得られ
る。さらに拡幅装置は掘削バケットの上部に配設されて
いるので、先行掘削する掘削バケット内の土砂を見るこ
とにより、拡幅部の土質が容易に確認でき、より確実な
杭躯体部の拡幅が可能になる。When the upper part of the pile body is locally widened, the bending moment due to the upper structure of the pile is not exerted on the pile body,
Reasonable and economical design is possible. When the scraper of the widening device is replaced, a corrugated pile having a widened pile surface in a wavy shape can be constructed, and a large peripheral friction force can be obtained. Furthermore, since the widening device is located above the excavation bucket, the soil quality of the widened part can be easily checked by looking at the soil in the excavation bucket to be pre-drilled, enabling more reliable widening of the pile frame. Become.
【0022】また荷重面が杭底より上面で作用するた
め、支持層は薄層でよく、更に拡幅が容易であるため、
杭沈下量、支持力の制御が容易に行われる。さらに拡幅
掘削時には、拡幅装置のスクレーパーが開閉駆動部材に
より開いて、拡幅掘削を行うが、このとき、スクレーパ
ーの先端部に設けた掘削ビットにより、孔壁面に爪跡が
残る。この爪跡は、装置全体を逆転し、掘削面をスクレ
ーバーの弦月状の胴で押圧して、恰も左官工が左官コテ
で壁面を押さえすり込むようにすることで消して、爪跡
のない滑らかな掘削面に仕上げる。この仕上げにより、
掘削面のアーチング作用を向上できて、掘削形状をより
一層安定化できる。Further, since the load surface acts on the upper surface from the pile bottom, the support layer may be a thin layer, and the width can be easily widened.
The amount of pile settlement and bearing capacity can be easily controlled. Further, at the time of widening excavation, the scraper of the widening device is opened by the opening / closing drive member to perform widening excavation. At this time, a claw mark remains on the hole wall surface due to the excavation bit provided at the tip of the scraper. This claw trace is reversed by turning the entire device in reverse and pressing the excavated surface with the lunar body of the scraper, as if the plasterer presses down the wall with a plastering iron, erasing it without any claw traces. Finish on the surface. With this finish,
The arching effect of the excavated surface can be improved, and the excavated shape can be further stabilized.
【0023】またスクレーパーは上下面とも開放された
中空状のため、掘削バケットが掘削孔内を昇降すると
き、従来のアースドリル工法と同じ状態で施工が可能に
なる。また拡幅により削り取られた土砂は、通常、泥水
中において浮遊しやすいが、掘削バケット直上の弦月状
のスクレーバーによる掘削では速やかに直下の掘削バケ
ット内に集積できて、スライムの発生を防止できる。Further, since the scraper has a hollow shape in which both the upper and lower surfaces are open, when the drilling bucket moves up and down in the drilling hole, it can be constructed in the same state as the conventional earth drilling method. In addition, although the earth and sand removed by the widening is usually easily suspended in muddy water, the excavation by the moon-shaped scraper immediately above the excavation bucket can quickly accumulate in the excavation bucket immediately below, thereby preventing the generation of slime.
【図1】本発明の場所打ちコンクリート杭の杭躯体拡幅
装置の一実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of a pile body widening device for a cast-in-place concrete pile of the present invention.
【図2】杭躯体拡幅装置の横断平面図である。FIG. 2 is a cross-sectional plan view of the pile body widening device.
【図3】杭躯体拡幅装置による節部の施工状況を示す正
面図である。FIG. 3 is a front view showing a construction state of a node portion by the pile body widening device.
【図4】杭躯体拡幅装置の横断平面図である。FIG. 4 is a cross-sectional plan view of the pile body widening device.
【図5】杭躯体拡幅装置による杭躯体部の掘削状況を示
す説明図である。FIG. 5 is an explanatory diagram showing a state of excavation of a pile skeleton by a pile skeleton widening device.
【図6】杭躯体拡幅装置による節杭の掘削状況を示す説
明図である。FIG. 6 is an explanatory view showing a state of excavation of a knotted pile by the pile body widening device.
【図7】杭躯体拡幅装置による拡幅柱状体掘削状況を示
す説明図である。FIG. 7 is an explanatory diagram showing a state of excavation of a widened columnar body by a pile body widening device.
【図8】杭躯体拡幅装置により施工されたコルゲート杭
を示す縦断面図である。FIG. 8 is a longitudinal sectional view showing a corrugated pile constructed by a pile body widening device.
【図9】杭躯体拡幅装置により施工されたコルゲート杭
と拡底杭との複合杭を示す縦断面図である。FIG. 9 is a vertical cross-sectional view showing a composite pile of a corrugated pile and an expanded bottom pile constructed by a pile body widening device.
【図10】杭躯体拡幅装置により施工された引抜専用杭
を示す縦断面図である。FIG. 10 is a longitudinal sectional view showing a drawing-only pile constructed by the pile body widening device.
【図11】杭躯体拡幅装置により施工された拡底杭を示
す縦断面図である。FIG. 11 is a longitudinal sectional view showing an enlarged pile pile constructed by the pile frame widening device.
【図12】杭躯体拡幅装置により施工された節杭を示す
縦断面図である。FIG. 12 is a longitudinal sectional view showing a knotted pile constructed by the pile body widening device.
【図13】杭躯体拡幅装置により施工された長尺拡底杭
を示す縦断面図である。FIG. 13 is a longitudinal sectional view showing a long expanded bottom pile constructed by the pile body widening device.
【図14】杭躯体拡幅装置により施工された杭躯体の上
部を局部拡幅した杭を示す縦断面図である。FIG. 14 is a longitudinal sectional view showing a pile locally widened at an upper portion of a pile skeleton constructed by the pile skeleton expanding device.
A 掘削バケット B 杭躯体拡幅装置 B′ 枠体 C 油圧ホース P 杭躯体 Q 拡幅節部 1 回転掘削軸 2 底蓋開閉装置 3 自由回転ジョイント 4、4’ スクレーパー 4a、4′a 掘削ビット 4b、4′b 案内板 5、5′ ピン 6、6′ 開閉駆動部材(油圧シリンダー) Reference Signs List A excavating bucket B pile body widening device B 'frame C hydraulic hose P pile body Q widening joint 1 rotary excavating shaft 2 bottom lid opening and closing device 3 free rotating joint 4, 4' scraper 4a, 4'a drill bit 4b, 4b 'B Guide plate 5, 5' Pin 6, 6 'Opening / closing drive member (hydraulic cylinder)
Claims (1)
ケットよりも上方の回転掘削軸上部に装着されて掘削バ
ケットの稼働中はスタビライザとして機能する拡幅装置
であって、拡幅装置に、複数のスクレーパーが開閉可能
に枢支されるとともに同各スクレーパーの開閉駆動部材
が設けられ、同各スクレーパーは、上下面の開放された
中空状に形成されるとともに外周面が掘削孔壁に沿って
弦月状に形成されていることを特徴とした場所打ちコン
クリート杭の杭躯体拡幅装置。1. A widening device which is mounted on an upper portion of a rotary digging shaft above a digging bucket mounted on a tip portion of a rotary digging shaft and functions as a stabilizer during operation of the digging bucket. Each of the scrapers is pivotally supported so as to be openable and closable, and each of the scrapers is provided with an opening / closing drive member. A pile frame widening device for cast-in-place concrete piles characterized by being formed in a moon shape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4126203A JP2850073B2 (en) | 1992-05-19 | 1992-05-19 | Pile frame widening device for cast-in-place concrete piles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4126203A JP2850073B2 (en) | 1992-05-19 | 1992-05-19 | Pile frame widening device for cast-in-place concrete piles |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05321559A JPH05321559A (en) | 1993-12-07 |
JP2850073B2 true JP2850073B2 (en) | 1999-01-27 |
Family
ID=14929268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4126203A Expired - Fee Related JP2850073B2 (en) | 1992-05-19 | 1992-05-19 | Pile frame widening device for cast-in-place concrete piles |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2850073B2 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000001849A (en) * | 1998-06-12 | 2000-01-07 | Geotop Corp | Cast-in-place knot pile |
KR100430342B1 (en) * | 2001-07-25 | 2004-05-04 | 원 회 양 | A formative installation and construction method of concrete file that projection is protruded into a radial shape |
JP4525228B2 (en) * | 2004-07-30 | 2010-08-18 | 株式会社大林組 | Excavator, wall pile construction method, and wall pile |
JP4619886B2 (en) * | 2005-07-27 | 2011-01-26 | 丸五基礎工業株式会社 | Widening excavation method |
JP4811654B2 (en) * | 2006-06-30 | 2011-11-09 | 株式会社進明技興 | Expanded root construction method and expanded excavator in all-casing method |
JP4838215B2 (en) * | 2007-09-18 | 2011-12-14 | ジャパンパイル株式会社 | Method and apparatus for excavating cast-in-place concrete joint pile |
KR100935661B1 (en) * | 2007-11-06 | 2010-01-07 | 브사렐건설 주식회사 | Extension device for soil nail hole and method thereof |
JP4877250B2 (en) * | 2008-03-06 | 2012-02-15 | 株式会社大林組 | Construction method of underground concrete structure and underground concrete structure |
JP4935717B2 (en) * | 2008-03-06 | 2012-05-23 | 株式会社大林組 | Underground concrete structure |
JP4877252B2 (en) * | 2008-03-06 | 2012-02-15 | 株式会社大林組 | Wall pile structure, construction method of wall pile structure |
KR100899086B1 (en) * | 2008-11-14 | 2009-05-26 | 브사렐건설 주식회사 | Extension device for soil nail hole |
CN102704851A (en) * | 2012-06-07 | 2012-10-03 | 三一重工股份有限公司 | Bottom expanding drill bit and rotary drilling machine |
CN106703702A (en) * | 2016-12-28 | 2017-05-24 | 武汉武船重型装备工程有限责任公司 | Side-flip alloy bit |
CN115059065B (en) * | 2022-07-19 | 2024-06-25 | 青岛理工大学 | Heat transfer enhancement type cast-in-situ variable-diameter energy pile and construction method thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5578423A (en) * | 1978-12-08 | 1980-06-13 | Matsushita Electric Works Ltd | Limit switch |
JPS6457229A (en) * | 1987-08-28 | 1989-03-03 | Matsushita Electric Ind Co Ltd | Optical switch |
-
1992
- 1992-05-19 JP JP4126203A patent/JP2850073B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH05321559A (en) | 1993-12-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2850073B2 (en) | Pile frame widening device for cast-in-place concrete piles | |
JP6886717B2 (en) | Construction method of steel pipe pile | |
JP4858878B2 (en) | Pile hole construction method | |
JP2668664B2 (en) | Ground improvement method and equipment | |
JP7145087B2 (en) | wing excavator | |
JP3165997B2 (en) | Casting method and equipment for sheet piles | |
JP2002317594A (en) | Pile hole excavating method, construction method for foundation pile, and soil adhering device to pile hole wall | |
JP3845562B2 (en) | Drilling bucket device for diameter expansion of cast-in-place piles | |
JP2001164566A (en) | Steel pipe pile and its embedding method | |
JPS6365797B2 (en) | ||
JP3971322B2 (en) | Wet column manufacturing equipment for foundation ground | |
JPH0414513A (en) | Ground consolidating method and ground consolidating device used therefor | |
JP3019988B2 (en) | Auger for hard ground excavation | |
JP3697348B2 (en) | Improvement method for soft ground | |
JPS6117972B2 (en) | ||
JP2980855B2 (en) | Caisson laying method and its equipment | |
JP2711357B2 (en) | Improvement method of construction ground and its drilling equipment. | |
JP7407078B2 (en) | How to install wall piles | |
JP5109526B2 (en) | Construction method of columnar improvement | |
JPH05179880A (en) | Excavated hole bottom part diameter enlarging bottom-dredging bucket | |
JP2633460B2 (en) | Drilling method | |
JPS6358999B2 (en) | ||
JP2729940B2 (en) | Drilling rig | |
JP3007755U (en) | Magnifying head | |
JP3094325B2 (en) | Drilling trench widening excavator and its widening excavation method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091113 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101113 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101113 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111113 Year of fee payment: 13 |
|
LAPS | Cancellation because of no payment of annual fees |