JPH02217516A - Pile driving method and excavating casing - Google Patents
Pile driving method and excavating casingInfo
- Publication number
- JPH02217516A JPH02217516A JP3665689A JP3665689A JPH02217516A JP H02217516 A JPH02217516 A JP H02217516A JP 3665689 A JP3665689 A JP 3665689A JP 3665689 A JP3665689 A JP 3665689A JP H02217516 A JPH02217516 A JP H02217516A
- Authority
- JP
- Japan
- Prior art keywords
- casing
- head
- cutting head
- pile
- hole
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 125000006850 spacer group Chemical group 0.000 claims abstract description 8
- 238000009412 basement excavation Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 11
- 239000011162 core material Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Earth Drilling (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、芯材としての既製杭を建込んで基礎杭を施工
する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of constructing a foundation pile by erecting a ready-made pile as a core material.
従来、無振動、無騒音杭打ち工法と称される既成杭の建
込み工法は、削孔し、その中にモルタルを充填してから
杭を建込むものである。この場合、掘削中の孔壁の崩壊
防止、建込む杭と支持地盤との結合、建込む杭の芯位置
の確保などに留意しなければならない。Conventionally, the method of erecting existing piles, which is referred to as the vibration-free and noise-free pile driving method, involves drilling holes, filling the holes with mortar, and then erecting the piles. In this case, care must be taken to prevent the wall of the hole from collapsing during excavation, to connect the piles to be erected with the supporting ground, and to ensure the core position of the piles to be erected.
従来の施工法は前記のようにモルタルを充填してから杭
を建込むものであるから、杭を挿入するのにモンケンな
どによる打撃′を全く必要としないわけではな(、完全
な無振動、無騒音と言えない場合が多い、このようなモ
ンケンなどによる打ち込みは、杭の損傷を招いたり、真
直精度にも悪影響を与えるおそれがある。Since the conventional construction method is to fill the mortar with mortar and then erect the piles as mentioned above, it does not require any impact with a hammer or the like to insert the piles (completely vibration-free, noise-free). Driving with a screwdriver or the like may cause damage to the pile and adversely affect straightness accuracy.
また、掘削中の孔壁の崩壊を防止するために、鋼管ケー
シングを建込むケーシング工法も知られている。これは
、例えばオーガスクリユーなどの外側にケーシングを配
して該オーガスリューでの掘削と同時にケーシングを挿
入していく。しかし、ケーシング引き抜き時に孔壁が崩
壊するのは防げず、さらにケーシング内に精度良く杭を
配置固定する確立された技術もなかった。Also known is a casing construction method in which a steel pipe casing is installed to prevent collapse of the hole wall during excavation. This involves placing a casing on the outside of an auger screw, for example, and inserting the casing at the same time as the auger screw is excavating. However, this did not prevent the hole wall from collapsing when the casing was pulled out, and there was also no established technology for accurately arranging and fixing the piles inside the casing.
本発明の目的は前記従来例の不都合を解消し、孔壁を圧
密することで孔壁の崩壊を完全に防止できるとともにモ
ルタルを介して既製杭と地盤の一体化が得られ、しかも
大深度の掘削が可能で支持地盤と既製杭との結合もモン
ケンなどによる打撃なしに得られ、さらに精度良く既製
杭の建込みができる杭の施工法を提供することにある。The purpose of the present invention is to eliminate the disadvantages of the conventional example, to completely prevent the collapse of the hole wall by consolidating the hole wall, to integrate the ready-made pile and the ground through mortar, and to make it possible to operate at great depths. To provide a pile construction method that enables excavation, allows connection of supporting ground and ready-made piles without being hit by a hammer, and allows ready-made piles to be erected with higher accuracy.
(課題を解決するための手段)
本発明は前記目的を達成するため、外周面を上下方向の
旋回溝形成部と肉厚な転圧部とに区画したカッティング
ヘッドを有する回転ケーシングを建込み、同時にケーシ
ング内部をケーシング上端開口から挿入する掘削バケッ
ト等の掘削手段で掘削、排土して、孔壁を圧密しながら
所定深度まで掘削し、次いで該ケーシング内に外周にス
ペーサーを設けた既成杭を芯材として建込み、前記カッ
ティングヘッドの先端よりモルタル等の固化材を注出し
て孔内を充填し、このモルタル等の固化材の充填度に応
じてケーシングを引き抜くこと及びケーシング本体及び
該ヘッドは2重壁の中空内部に送気管兼用の送液管を設
け、その下端をカッティングヘッドの下端に注出口とし
て臨ませ、また、この部分にダウンザホールハンマーを
着脱自在に装着可能としたことを要旨とするものである
。(Means for Solving the Problems) In order to achieve the above object, the present invention includes a rotary casing having a cutting head whose outer circumferential surface is divided into a vertical swirl groove forming part and a thick rolling part, At the same time, the inside of the casing is excavated and removed using a digging means such as a digging bucket that is inserted through the upper opening of the casing, and the hole wall is excavated to a predetermined depth while compacting, and then a ready-made pile with a spacer provided on the outer periphery is installed inside the casing. A solidifying material such as mortar is poured out from the tip of the cutting head to fill the hole, and the casing is pulled out according to the degree of filling of the solidifying material such as mortar, and the casing body and the head are The main idea is that a liquid supply pipe that also serves as an air supply pipe is installed in the hollow interior of the double wall, and its lower end faces the lower end of the cutting head as a spout, and a down-the-hole hammer can be detachably attached to this part. It is something to do.
請求項第1項記載の本発明によれば、ケーシングを回転
させながら建込む時に、そのヘッドの下端面のカッター
ビットで削ら′れた土砂はヘッドの外側に押出され一部
はその外周面の転圧部で孔壁に圧密される。また、残り
の土砂は旋回溝形成部の溝に導かれて上昇しつつ転圧部
により孔壁に圧密される。According to the present invention as set forth in claim 1, when the casing is rotated and erected, the earth and sand scraped by the cutter bit on the lower end surface of the head is pushed out to the outside of the head, and some of it is on the outer circumferential surface of the casing. It is consolidated into the hole wall in the rolling section. In addition, the remaining earth and sand are guided by the grooves of the swirl groove forming part and rise, and are consolidated on the hole wall by the rolling part.
このように孔壁が圧密されることで、ケーシング周面の
摩擦が除去され、大深度の掘削が可能となり、また不透
水層が形成できるので地下水の流速が速いところでも場
所打ち杭の施工が可能となる。By consolidating the hole wall in this way, friction on the casing surface is removed, making it possible to excavate to great depths.Also, an impermeable layer can be formed, making it possible to construct cast-in-place piles even in areas where groundwater flows quickly. It becomes possible.
また、該ケーシング内に建込む芯材としての既成杭は外
周に設けたスペーサーによりケーシング内で所定の位置
を確保でき、さらにケーシングがガイドとなって精度の
高い設置ができる。In addition, the prefabricated pile as a core material to be erected inside the casing can be secured at a predetermined position within the casing by the spacer provided on the outer periphery, and the casing acts as a guide, allowing highly accurate installation.
杭と孔壁間にモルタル等の固化材を注入することで、打
撃を加えることなく杭と地盤は一体化するが、圧密した
孔壁とモルタル等の固化材により杭は地盤中に一層強固
にセットされる。By injecting a solidifying material such as mortar between the pile and the hole wall, the pile and the ground are integrated without any impact, but the consolidated hole wall and the solidifying material such as mortar make the pile even stronger in the ground. Set.
請求項第2項記載の本発明によれば、前記圧密作用に加
えて、注出口を閉じ送液管を送気管としてこのダウンザ
ホールハンマーに圧搾空気を供給することによりカッタ
ービットとダウンザホールハンマーの併用掘削を行い、
硬質の地盤も効率のよい掘削が可能となる。According to the present invention as set forth in claim 2, in addition to the compacting action, the spout is closed and the liquid feed pipe is used as an air feed pipe to supply compressed air to the down-the-hole hammer, thereby performing combined excavation with the cutter bit and the down-the-hole hammer. and
Efficient excavation is possible even in hard ground.
以下、図面について本発明の実施例を詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第1図は本発明の杭の施工法の1実施例を示す1部切欠
いた正面図であるが、先に本発明工法で用いる装置につ
いて説明する。FIG. 1 is a partially cutaway front view showing one embodiment of the pile construction method of the present invention. First, the equipment used in the construction method of the present invention will be explained.
図中2は鋼管による二重壁のケーシング本体、lはこの
ケーシング本体2の先端に嵌合しボルト止めで固定する
カッティングヘッドである。In the figure, 2 is a double-walled casing body made of a steel pipe, and 1 is a cutting head that fits into the tip of the casing body 2 and is fixed with bolts.
第8図〜第1θ図に示すように該カッティングヘッドl
はケーシング本体2と同じく二重壁の短尺筒体からなり
、その上端にはケーシング本体2への嵌合継手3を形成
し、下端面にはカッタービット4を植設する。As shown in FIGS. 8 to 1θ, the cutting head l
Like the casing body 2, it is made of a double-walled short cylindrical body, and a fitting joint 3 to the casing body 2 is formed at its upper end, and a cutter bit 4 is implanted in its lower end surface.
カッティングヘッド1の外周面は凹部に突条5を設けそ
の間を旋回溝6とした旋回溝形成部と肉厚でケーシング
本体2より僅かに外側に突出する転圧部7とに区画形成
するが、図示の例ではこの旋回溝形成部と転圧部7とは
それぞれ一対ずつ対向するように形成した。The outer circumferential surface of the cutting head 1 is divided into a turning groove forming part with a protrusion 5 in the concave part and a turning groove 6 between them, and a thick rolling part 7 slightly protruding outward from the casing body 2. In the illustrated example, each pair of swirl groove forming portions and rolling pressure portions 7 are formed to face each other.
転圧部7は断面形状が、回転方向に対して先細となる匂
玉状に形成してテーパー面7aを有するものとし、この
テーパー面7aを介して掘削土砂を回転により外方に押
圧出来るようにしである。The rolling section 7 has a cross-sectional shape that is tapered in the direction of rotation and has a tapered surface 7a, so that the excavated earth and sand can be pressed outward by rotation through this tapered surface 7a. It's Nishide.
前記突条5のうちの数個は途中を切断し、砂利等を逃す
横溝8を形成する。Several of the protrusions 5 are cut in the middle to form lateral grooves 8 through which gravel and the like can escape.
これら、ケーシング本体2及びヘッド1は二重壁の中空
内部に送液管10を設け、その下端をヘッドlの下端に
注出口9として臨ませる。また、この送液管10の上端
にはスイベル装置11を取付けて、ここにモルタル等の
固化材の製造プラント12からの送液管13を接続可能
とする。The casing main body 2 and the head 1 are provided with a liquid feeding pipe 10 inside the hollow double wall, and the lower end of the pipe 10 faces the lower end of the head 1 as a spout 9. Further, a swivel device 11 is attached to the upper end of this liquid sending pipe 10, so that a liquid sending pipe 13 from a manufacturing plant 12 for solidifying materials such as mortar can be connected thereto.
なお、送液管lOは送気管としても使用出来るものであ
り、カッティングヘッド1ではこの送液管10の個所に
エアーで駆動するダウンザホールノ1ンマー(エアーハ
ンマー)22を着脱自在に装着し、注出口9を閉じ、送
液管IOを送気管としてこのダウンザホールハンマー2
2に圧搾空気を供給することによりダウンザホールハン
マー22の併用掘削も可能とした。Note that the liquid feed pipe 10 can also be used as an air pipe, and in the cutting head 1, a down-the-hole hammer (air hammer) 22 driven by air is removably attached to the liquid feed pipe 10. Close the outlet 9 and use the liquid supply pipe IO as the air supply pipe for this down-the-hole hammer 2.
By supplying compressed air to the down-the-hole hammer 22, it is also possible to excavate in combination with the down-the-hole hammer 22.
図中14はケーシング建込み機であり、モータと減速機
及びこれらにより回転するケーシングチャック機構から
なるケーシング駆動部15を昇降ジヤツキ16を脚とし
てこれで支承する。In the figure, reference numeral 14 denotes a casing erection machine, which supports a casing drive section 15 consisting of a motor, a speed reducer, and a casing chuck mechanism rotated by these, with lifting jacks 16 as legs.
第11図〜第13図は鋼管、H型鋼、コンクリートパイ
ルなどの既製杭17の外周に取り付けるスペーサー18
を示し、これは半円形の帯金を組合わせてボルト・ナツ
ト19で結合するバンドタイプであり、第13図に示す
ようにケーシング本体2内に既製杭17を挿入した時に
中心に位置しかつ適宜な間隔を保持できるような縦の鍔
板18aを放射状に突設した。Figures 11 to 13 show a spacer 18 attached to the outer periphery of a ready-made pile 17 such as a steel pipe, H-shaped steel, or concrete pile.
This is a band type in which semicircular metal bands are combined and connected with bolts and nuts 19, and as shown in FIG. Vertical flange plates 18a are provided to protrude radially so as to maintain appropriate spacing.
次に、このような装置を用いて行う本発明工法について
説明する。Next, the construction method of the present invention using such a device will be explained.
第2図〜第7図は各工程を示す縦断正面図で、前記ケー
シング建込み機14のケーシング駆動部15に、チャッ
ク機構でケーシング建込2の外周を固定するようにケー
シング本体2をセットし、モータを始動すれば減速機を
介してチャック機構が回転し、該チャック機構で押えら
れたケーシング本体2及びその先端のカッティングヘッ
ドlも一方向にゆっくりと回転する。FIGS. 2 to 7 are longitudinal sectional front views showing each process, in which the casing body 2 is set in the casing drive unit 15 of the casing installation machine 14 so that the outer periphery of the casing installation 2 is fixed by a chuck mechanism. When the motor is started, the chuck mechanism rotates via the speed reducer, and the casing body 2 held down by the chuck mechanism and the cutting head l at its tip also slowly rotate in one direction.
第2図に示すようにヘッド1の下端面はカッタービット
4もしくはダウンザホールハンマー22で地盤を切削し
、地盤中へ切込まれていく。As shown in FIG. 2, the lower end surface of the head 1 is cut into the ground by cutting the ground with a cutter bit 4 or a down-the-hole hammer 22.
このカッタービット4での切削土砂や石くずは、ヘッド
1の外側へ押し出され、その一部はヘッド1の転圧部7
で孔壁に圧密される。また残りの土砂等は旋回溝6に沿
って上昇しつつ転圧部7によって孔壁に圧密される。The earth, sand, and stone chips cut by the cutter bit 4 are pushed out to the outside of the head 1, and some of them are transferred to the rolling part 7 of the head 1.
is consolidated into the hole wall. Further, the remaining earth and sand rises along the swirl groove 6 and is compacted onto the hole wall by the rolling section 7.
昇降ジヤツキ16はフリーとなっており、このようにし
てヘッド1及びケーシング本体2が地盤に建込まれてい
くと、自重でケーシング駆動部15も下降するが、その
最下位まで達すると、チャック機構を一度ゆるめて昇降
ジヤツキ16を伸して駆動部15を押し上げ、再度ケー
シング本体2の上部をチャック機構で固定して同様の動
作を繰返す。The lifting jack 16 is free, and when the head 1 and the casing body 2 are built into the ground in this way, the casing drive unit 15 also descends due to its own weight, but when it reaches the lowest position, the chuck mechanism is loosened once, the lifting jack 16 is extended to push up the drive part 15, the upper part of the casing body 2 is fixed again with the chuck mechanism, and the same operation is repeated.
一方、ヘッド1内で輪切りにされた土砂はハンマーグラ
ブや他の掘削バケット等の掘削手段19をケーシング本
体2内へ上方から吊下し、これで掘削、排土する。On the other hand, the earth and sand cut into rings in the head 1 are excavated and removed by an excavating means 19 such as a hammer grab or other excavating bucket suspended from above into the casing body 2.
前記孔壁の圧密についてさらに説明すると、カッティン
グへラド1は、回転ケーシング本体2の先端に結合する
ものであるから、カッタービット4及びダウンザホール
ハンマー22で切削された土砂の一部はすぐに孔壁に圧
密される。通常、ボイド率はローム層では約60〜70
%、砂層では約35〜45%、礫層では約25〜35%
であるが本発明のヘッド1によれば、各地層の圧密限界
近くまで圧密して、不透水層を形成できるものである。To further explain the compaction of the hole wall, since the cutting blade 1 is connected to the tip of the rotating casing body 2, a portion of the earth and sand cut by the cutter bit 4 and the down-the-hole hammer 22 is immediately absorbed into the hole wall. Consolidated. Usually, the void ratio is about 60-70 in loam layer.
%, about 35-45% in sand layer, about 25-35% in gravel layer
However, according to the head 1 of the present invention, each layer can be consolidated close to its consolidation limit to form an impermeable layer.
また、ケーシング本体2の先端部のみで土砂圧密作用を
行うものであるからケーシング本体2の周面に対する掘
削時の摩擦抵抗を減じ効率的な削孔を実現でき、さらに
、土砂の転圧部はケーシング本体2の全長に設けること
なく先端のへラド1にのみあるので、ケーシングの回転
に際して余分な負荷をかけることがないものとなり、大
深度の掘削を可能とする。In addition, since the soil compaction effect is performed only at the tip of the casing body 2, the frictional resistance during excavation against the circumferential surface of the casing body 2 can be reduced and efficient drilling can be achieved. Since it is not provided along the entire length of the casing body 2, but only on the spatula 1 at the tip, no extra load is applied when rotating the casing, making it possible to excavate at great depths.
また、岩盤等の硬質の支持地盤20の掘削に対しては、
ダウンザホールハンマー22が有効に働くものである。In addition, for excavation of hard supporting ground 20 such as bedrock,
The down-the-hole hammer 22 works effectively.
第3図に示すように支持地盤20に達する所定深度まで
掘削したならば、第4図に示すように、外周にスペーサ
ー18を上下に取付けた既製杭17を芯材としてケーシ
ング本体2及びカッティングヘッド1内に該ケーシング
本体2の上端開口より建込む。この建込みはケーシング
本体2をガイドとして精度良く行われ、鍔板18aで既
製杭17はケーシング本体2内の中心位置にかつケーシ
ング本体2と適宜な間隔を保持して収まる。As shown in FIG. 3, once the excavation has been carried out to a predetermined depth reaching the supporting ground 20, as shown in FIG. 1 from the upper end opening of the casing body 2. This erection is carried out with high accuracy using the casing body 2 as a guide, and the ready-made pile 17 is housed at the center position within the casing body 2 and at an appropriate distance from the casing body 2 by the collar plate 18a.
次いで、第5図に示すように送液管10の上端にはスイ
ベル装置11を取付けて、ここにモルタル等の固化材の
製造プラン目2からの送液管13を接続し、該プラン目
2から送りこむモルタル等の固化材21をヘッド1の下
端に注出口9より注出する。Next, as shown in FIG. 5, a swivel device 11 is attached to the upper end of the liquid feed pipe 10, and the liquid feed pipe 13 from the second plan for manufacturing solidifying material such as mortar is connected thereto. A solidifying material 21 such as mortar is poured into the lower end of the head 1 from the spout 9.
このモルタル等の固化材21は孔内に底から溜まり、上
へと充填されていくが、同時に前記建込み時とは逆動作
でケーシング建込み機14を駆動してケーシング本体2
及びカッティングヘッド1を引き抜く。(第6図参照)
このように、ケーシングを引き抜きながら第7図に示す
ように孔の上部までモルタル等の固化材21を注入すれ
ば、施工は完了する。This solidified material 21 such as mortar accumulates in the hole from the bottom and is filled upwards, but at the same time, the casing erecting machine 14 is driven in a reverse operation to the erecting operation, and the casing main body 2
and pull out the cutting head 1. (See FIG. 6) In this way, the construction is completed by injecting the solidifying material 21 such as mortar up to the upper part of the hole as shown in FIG. 7 while pulling out the casing.
以上述べたように本発明の杭の施工法は、ケーシング本
体先端のカッティングヘッド孔壁を圧密することで孔壁
の崩壊を完全に防止できるとともにケーシング周面の摩
擦が除去され、大深度の掘削が可能となり、また不透水
層が形成できるので地下水の流速が速いところでも場所
打ち杭の施工が可能となるものである。As described above, the pile construction method of the present invention completely prevents collapse of the hole wall by consolidating the hole wall of the cutting head at the tip of the casing body, and also eliminates friction on the casing surface, allowing for deep excavation. Furthermore, since an impermeable layer can be formed, cast-in-place piles can be constructed even in areas where groundwater flows quickly.
また、モルタル等の固化材を介して芯材としての既製杭
と地盤の一体化が得られ、しかも大深度の掘削が可能な
ので支持地盤と既製杭との結合も良く、施工手順として
既製杭と孔壁間にモルタル等の固化材を注入することで
、打撃を加えることなく杭と地盤が一体化し、圧′密し
た孔壁とモルタル等の固化材により既製杭は地盤中に一
層強固にセットされる。In addition, it is possible to integrate the ready-made pile as a core material with the ground through a solidifying material such as mortar, and since it is possible to excavate to a great depth, the connection between the supporting ground and the ready-made pile is good. By injecting a solidifying material such as mortar between the hole walls, the pile and the ground are integrated without any impact, and the compacted hole walls and solidifying material such as mortar make the ready-made pile more firmly set in the ground. be done.
さらに、ケーシング内に建込む芯材としての既成杭は外
周に設けたスペーサーによりケーシング内で所定の位置
を確保でき、さらにケーシングがガイドとなって精度の
高い設置ができ、施工精度の良い杭が得られるものであ
る。Furthermore, the prefabricated piles that serve as the core material to be built inside the casing can be secured in a predetermined position within the casing by spacers provided on the outer periphery, and the casing acts as a guide for highly accurate installation, resulting in piles with high construction accuracy. That's what you get.
第1図は本発明の杭の施工法の1実施例を示す一部切欠
いた正面図、第2図〜第7図は各工程を示す縦断正面図
、第8図はカッティングヘッドの側面図、第9図は同上
正面図、第10図は第9図の横断平面図、第11図はス
ペーサーの斜視図、第12図は同上平面図、第13図は
スペーサーとケーシングの関係を示す平面図である。
1・・・カッティングヘッド
2・・・ケーシング本体
3・・・嵌合継手 4・・・カッタービット5・
・・突条 6・・・旋回溝7・・・転圧部
7a・・・テーパー面8・・・横溝
9・・・注出口10・・・送液管
11・・・スイベル装置
13・・・送液管
15・・・ケーシング駆動部
16・・・昇降ジヤツキ エフ・・・既製杭18・・
・スペーサー 18a・・・鍔板19・・・掘削手
段 20・・・支持地盤21・・・モルタル等の
固化材
22・・・ダウンザホールハンマー
12・・・プラント
14・・・ケーシング建込み機FIG. 1 is a partially cutaway front view showing one embodiment of the pile construction method of the present invention, FIGS. 2 to 7 are longitudinal sectional front views showing each process, and FIG. 8 is a side view of the cutting head. Fig. 9 is a front view of the same as above, Fig. 10 is a cross-sectional plan view of Fig. 9, Fig. 11 is a perspective view of the spacer, Fig. 12 is a plan view of the same as above, and Fig. 13 is a plan view showing the relationship between the spacer and the casing. It is. 1... Cutting head 2... Casing body 3... Fitting joint 4... Cutter bit 5...
・Protrusion 6 ・Swivel groove 7 ・Rolling part
7a...Tapered surface 8...Horizontal groove
9... Outlet 10... Liquid feeding pipe 11... Swivel device 13... Liquid feeding pipe 15... Casing drive unit 16... Lifting jack F... Ready-made pile 18...
- Spacer 18a... Flange plate 19... Excavation means 20... Supporting ground 21... Solidifying material such as mortar 22... Down-the-hole hammer 12... Plant 14... Casing erection machine
Claims (2)
とに区画したカッティングヘッドを有する回転ケーシン
グを建込み、同時にケーシング内部をケーシング上端開
口から挿入する掘削バケット等の掘削手段で掘削、排土
して、孔壁を圧密しながら所定深度まで掘削し、次いで
該ケーシング内に外周にスペーサーを設けた既成杭を芯
材として建込み、前記カッティングヘッドの先端よりモ
ルタル等の固化材を注出して孔内を充填し、このモルタ
ル等の固化材の充填度に応じてケーシングを引き抜くこ
とを特徴とする杭の施工法。(1) Excavation means such as an excavation bucket that erects a rotary casing having a cutting head whose outer circumferential surface is divided into a vertical turning groove forming part and a thick rolling part, and at the same time inserts the inside of the casing from the upper end opening of the casing. The soil is excavated and removed to a predetermined depth while compacting the hole wall, and then a prefabricated pile with a spacer on the outer periphery is built into the casing as a core material, and mortar etc. is solidified from the tip of the cutting head. A pile construction method characterized by pouring material to fill the hole and pulling out the casing depending on the degree of filling with solidifying material such as mortar.
とに区画したカッティングヘッドを有し、ケーシング本
体及び該ヘッドは二重壁の中空内部に送気管兼用の送液
管を設け、その下端をカッティングヘッドの下端に注出
口として臨ませ、また、この部分にダウンザホールハン
マーを着脱自在に装着可能としたことを特徴とする掘削
ケーシング。(2) It has a cutting head whose outer circumferential surface is divided into a vertical swirl groove forming part and a thick rolling part, and the casing body and the head have a double-walled hollow interior with a liquid supply pipe that also serves as an air supply pipe. An excavation casing characterized by having a lower end facing the lower end of a cutting head as a spout, and a down-the-hole hammer being detachably attached to this part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1036656A JPH076190B2 (en) | 1989-02-16 | 1989-02-16 | Pile construction method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1036656A JPH076190B2 (en) | 1989-02-16 | 1989-02-16 | Pile construction method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02217516A true JPH02217516A (en) | 1990-08-30 |
JPH076190B2 JPH076190B2 (en) | 1995-01-30 |
Family
ID=12475899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1036656A Expired - Fee Related JPH076190B2 (en) | 1989-02-16 | 1989-02-16 | Pile construction method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH076190B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005248439A (en) * | 2004-03-01 | 2005-09-15 | Yoshitada Miyake | Pile embedding method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60164511A (en) * | 1984-02-03 | 1985-08-27 | Matsuzawa Kiko:Kk | Pile pit formation work |
JPS626023A (en) * | 1985-07-01 | 1987-01-13 | Yoshihiro Oota | Construction work for foundation pile |
JPS63289114A (en) * | 1987-05-21 | 1988-11-25 | Matsuzawa Kiko:Kk | Head for drill casing |
-
1989
- 1989-02-16 JP JP1036656A patent/JPH076190B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60164511A (en) * | 1984-02-03 | 1985-08-27 | Matsuzawa Kiko:Kk | Pile pit formation work |
JPS626023A (en) * | 1985-07-01 | 1987-01-13 | Yoshihiro Oota | Construction work for foundation pile |
JPS63289114A (en) * | 1987-05-21 | 1988-11-25 | Matsuzawa Kiko:Kk | Head for drill casing |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005248439A (en) * | 2004-03-01 | 2005-09-15 | Yoshitada Miyake | Pile embedding method |
Also Published As
Publication number | Publication date |
---|---|
JPH076190B2 (en) | 1995-01-30 |
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