JPH08209686A - Pile head processing tool and pile head processing construction method for cast-in-place pile - Google Patents

Pile head processing tool and pile head processing construction method for cast-in-place pile

Info

Publication number
JPH08209686A
JPH08209686A JP28364595A JP28364595A JPH08209686A JP H08209686 A JPH08209686 A JP H08209686A JP 28364595 A JP28364595 A JP 28364595A JP 28364595 A JP28364595 A JP 28364595A JP H08209686 A JPH08209686 A JP H08209686A
Authority
JP
Japan
Prior art keywords
pile
cap body
concrete
bottom plate
inner cylinder
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
Application number
JP28364595A
Other languages
Japanese (ja)
Inventor
Masaharu Ookawa
将玄 大川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP28364595A priority Critical patent/JPH08209686A/en
Priority to US08/836,696 priority patent/US5961253A/en
Priority to DE69528377T priority patent/DE69528377D1/en
Priority to KR1019970702757A priority patent/KR100428018B1/en
Priority to EP95938611A priority patent/EP0796948B1/en
Priority to CN95196621A priority patent/CN1077942C/en
Priority to PCT/JP1995/002438 priority patent/WO1996018001A1/en
Publication of JPH08209686A publication Critical patent/JPH08209686A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To reduce pressure to a cap as much as possible, and smoothly pass them when a stabilizing liquid to fill up to prevent a collapse of an excavating hole wall and excessive spring water are pushed up by containing slime or the like at concrete placing time and overflow by passing through the inside of the cap and a clearance between the cap and a casing, by eliminating removing work of slime-mixed concrete of an inner cylinder after concrete is placed and cured, and preventing generation of an accumulating layer such as slime under a bottom surface by placing of concrete. CONSTITUTION: An inner cylinder 2 into which a concrete placing tremie pipe can be freely inserted, is surrounded at a prescribed interval with an outer cylinder 3. The upper ends of both cylinders 2 and 3 are locked and installed by an annular top plate 1, and the lower ends are locked and installed by an annular bottom plate 6, respectively, and a double cylindrical cap main body A is formed. Plural pile main reinforcement holes 8 are bored at prescribed intervals in the bottom plate 6 of this cap main body A, and gas-liquid bleeding holes 5 and 9 are opened and formed in the top plate 1 and the bottom plate 6.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、各種の土木建築工
事において地中に施工される場所打ち鉄筋コンクリート
杭における鉄筋篭の杭頭部に冠挿する杭頭処理具及び杭
頭処理工法の改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a pile head treatment tool and a pile head treatment method for crown-inserting the pile head of a reinforced basket in cast-in-place reinforced concrete piles to be constructed underground in various civil engineering construction works. .

【0002】[0002]

【従来の技術】従来から土木建築工事においては、各種
の工法によって基礎杭の埋設工事が行われているが、近
年は主に場所打ちコンクリート杭工法によって施工され
ている。
2. Description of the Related Art Conventionally, in civil engineering and construction work, foundation piles are buried by various construction methods, but in recent years, they are mainly constructed by the cast-in-place concrete pile construction method.

【0003】この場所打ちコンクリート杭工法は、地中
の支持地盤までアースドリル工法等によって先ず円形状
の掘削孔を形成し、杭主筋を篭状に組み立てた鉄筋篭を
前記掘削孔に建て込み、続いてトレミー管を鉄筋篭の上
方から挿入し、トレミー管の先端からコンクリートを吐
出して掘削孔の下端からコンクリートを打設して鉄筋コ
ンクリート杭を築造する。
In this cast-in-place concrete pile method, a circular excavation hole is first formed up to a supporting ground in the ground by an earth drill method or the like, and a reinforcing bar cage in which the main reinforcement of the pile is assembled into a cage is built in the excavation hole, Next, a tremie pipe is inserted from above the reinforced basket, concrete is discharged from the tip of the tremie pipe, and concrete is poured from the lower end of the drilling hole to construct a reinforced concrete pile.

【0004】この際、打設したコンクリートは、鉄筋篭
の上端を超えて1m近い余盛コンクリート部を形成す
る。この余盛コンクリート部の上部掘削孔に土砂礫を埋
戻した後、コンクリートの養生を行う。
At this time, the cast concrete forms a surplus concrete portion of about 1 m beyond the upper end of the reinforced basket. After backfilling the gravel and gravel in the upper excavation hole of this surplus concrete part, concrete is cured.

【0005】養生後、掘削して土砂礫を取り除き、余盛
コンクリート部をはつり取って前記鉄筋篭の杭主筋を露
出させ、この杭主筋を基礎として建物の基礎工事を施工
する。
After curing, excavation is carried out to remove gravel and gravel, and the surplus concrete portion is scraped off to expose the main reinforcing bar of the above-mentioned reinforcing bar cage, and the foundation work of the building is constructed on the basis of the main reinforcing bar of the pile.

【0006】この余盛コンクリート部のはつり工事は、
従来騒音、振動、粉塵等の公害源として問題となってお
り、また杭主筋を傷めたり、労働災害や職業病の原因と
もなっていた。さらに、余盛コンクリート部の材料費、
はつり工事費並びに工期の増大等コスト高の大きな原因
ともなっていた。
[0006] This surplus concrete part is chipped,
Conventionally, it has been a problem as a pollution source such as noise, vibration, and dust, and it has also been a cause of damage to the main reinforcement of piles, work accidents and occupational diseases. In addition, the material cost of the extra concrete,
It was also a major cause of high costs such as chipping work and an increase in construction period.

【0007】そこで、このはつり工事を省略する手段と
して特開昭61−186616号公報に開示の発明が提
案されていた。この発明は、トレミー管を介してコンク
リート打設を行った直後の未だ固化しない余盛部の強粘
性コンクリートを、強力な真空ポンプに連結したサクシ
ョンホースにてコンクリートを吸引除去する工法であ
る。勿論この工法は、掘削孔に嵌め込むケーシングが在
ってこそ可能であり、工事現場の状況によっては必ずし
も適用できるものでない。むしろ掘削孔の崩壊をもたら
す危険性がある。
Therefore, the invention disclosed in Japanese Patent Laid-Open No. 61-186616 has been proposed as a means for omitting the hanging work. The present invention is a method of suctioning and removing concrete from a viscous concrete in a surplus portion that has not yet solidified immediately after concrete is poured through a tremie pipe by a suction hose connected to a powerful vacuum pump. Of course, this construction method is possible only when there is a casing fitted in the excavation hole, and is not necessarily applicable depending on the situation of the construction site. Rather, there is a risk of causing borehole collapse.

【0008】さらに、前記工法では余盛コンクリート部
が無くなる替わりに、埋戻しに際し土砂礫によって杭主
筋が屈曲したり、養生後の余盛コンクリート部のはつり
掘削に大型重機を用いるため、杭主筋の頭部が破損して
その修復に手間どる等の欠点があり、実用性には乏しい
工法であった。
Further, in the above-mentioned construction method, instead of eliminating the surplus concrete portion, the main reinforcement of the pile is bent due to gravel and gravel during backfilling, and a large heavy machine is used for excavating the surplus concrete portion after curing. There was a defect that the head was damaged and it took time to repair it, and it was a method of practical lack.

【0009】そこで、前記した余盛コンクリート部のは
つり工事に伴う杭主筋の損傷を防ぐことを主目的とし
て、特開昭58−153816号公報に開示のような杭
頭鉄筋キャップが開発されていた。
Therefore, a pile head rebar cap as disclosed in Japanese Patent Application Laid-Open No. 58-153816 has been developed mainly for the purpose of preventing damage to the main reinforcement of the pile due to the above-mentioned chipping work of the overfilled concrete portion. .

【0010】このキャップは、中央部にトレミー管を挿
脱自在に取り付けできる貫通孔を有すると共に、この貫
通孔を中心として2区画室又は類似の構成よりなるドー
ナツ形の閉止された二重構造のものであり、環状の底
板、天板には孔が穿設してある。
This cap has a through hole into which a tremie tube can be removably attached, and has a donut-shaped closed double structure having two compartments or a similar structure centering on this through hole. Holes are formed in the annular bottom plate and top plate.

【0011】このキャップに前記底板若しくは天板に穿
設した孔を介して連結ボルトを螺入し、鉄筋篭の杭主筋
上端部に後端を取り付けたスリーブジョイントを前記連
結ボルトに連結して、キャップと鉄筋篭とを固く連結
し、前記貫通孔にトレミー管を導入してコンクリート打
設を行う。
A connecting bolt is screwed into this cap through a hole formed in the bottom plate or the top plate, and a sleeve joint having a rear end attached to the upper end of the main bar of the reinforcing bar basket is connected to the connecting bolt. The cap and the rebar cage are firmly connected, and a tremie pipe is introduced into the through hole for concrete pouring.

【0012】鉄筋篭へのコンクリート打設は、鉄筋篭の
上部に被せたキャップ装置を埋め込むまで行う。その
後、この鉄筋篭を埋設した上部掘削孔に土砂礫を埋戻
し、コンクリートの養生を行う。養生完了後、土砂礫を
除去し、キャップを覆っているコンクリートをはつり取
り、キャップの閉止状態を開くための数ヶ所のビスの取
り外しを行い、次いでスリーブジョイントから連結ボル
トを抜き取り、キャップを外し、このスリーブジョイン
トにアンカー筋の下端のネジ部を螺入して、アンカー筋
を杭主筋に連結起立させることが提案されている。
The concrete is cast into the reinforced basket until the cap device placed on the upper part of the reinforced basket is embedded. After that, the gravel and gravel is backfilled in the upper excavation hole in which the rebar cage is buried, and the concrete is cured. After curing, remove the gravel, scrape off the concrete covering the cap, remove several screws to open the closed state of the cap, then remove the connecting bolt from the sleeve joint, remove the cap, It has been proposed that a threaded portion at the lower end of the anchor bar is screwed into this sleeve joint so that the anchor bar is connected and erected to the pile main bar.

【0013】この提案によれば、従前より余盛コンクリ
ート部は少ないものの、依然としてはつり工事は不可欠
であり、またキャップ自体の構成が複雑で、殊に2区画
室等の連結作業が必至である。そのためにキャップを閉
止するための側板の付け外しも当然手間のかかる作業と
なる。更にスリーブジョイントにアンカー筋を螺入し
て、杭主筋を所定の高さまで延長する手段は、強度に問
題があり経験則上極めて不安定で一般に避ける工法であ
り、不測の事故が発生する可能性もあり、技術的に多く
の課題が残されている。
According to this proposal, although the surplus concrete portion is smaller than before, the chipping work is still indispensable, and the structure of the cap itself is complicated, and especially the connecting work of the two compartments is inevitable. Therefore, it is a laborious work to attach and remove the side plate for closing the cap. In addition, the method of screwing the anchor bar into the sleeve joint and extending the pile main bar to a predetermined height is a method that is generally unstable because of problems with strength and is extremely unstable as a rule of thumb, and an unexpected accident may occur. Therefore, many technical problems remain.

【0014】場所打杭の杭頭処理具(以下キャップ本体
と略称する)の提案には、前記の他に本願発明者が先に
提案した特開平1−322020号開示の場所打杭の杭
頭処理用キャップがある。
In addition to the above, a pile head treating tool for cast-in-place piles (hereinafter abbreviated as a cap body) has been proposed by the inventor of the present application previously disclosed in Japanese Patent Laid-Open No. 1-232020. There is a processing cap.

【0015】この提案のキャップ本体は、前記特開昭5
8−153816号公報記載の複雑な2区画室等より成
る浅いドーナツ形のキャップとは異なり、トレミー管を
自在に挿通可能な貫通孔としての上下面開放形の内円筒
(トレミー管導入管)と、その外側に天板と底板の外周
を連結する外円筒(キャップ上部)とより成る単純な二
重筒より形成され、底板の周縁(切断予定面皿)寄りに
複数の杭主筋孔が穿設されている(カッコ内は公報記載
の名称)。
The cap body of this proposal is disclosed in the above-mentioned Japanese Patent Laid-Open No.
Unlike the shallow donut-shaped cap composed of complicated two compartments described in Japanese Patent Publication No. 8-153816, an inner cylinder (tremy tube introduction tube) with upper and lower surfaces opened as a through hole through which a tremie tube can be freely inserted. , It is formed by a simple double cylinder consisting of an outer cylinder (upper cap) that connects the outer circumference of the top plate and the bottom plate on the outside, and multiple pile main holes are drilled near the peripheral edge of the bottom plate (planned cutting plate). (The name in parentheses is the name stated in the publication).

【0016】即ち同提案の意図するキャップ本体は、特
に余盛りコンクリート部にほぼ相当する大きさに設定す
るため、前記特開昭58−153816号公報の浅いキ
ャップ(装置)に比較すれば、遙に深い円筒上に形成さ
れ、この円筒の天板まで杭主筋孔を介して杭主筋を挿通
し、前記内円筒にトレミー管を貫通してコンクリート打
設を行うもので、従来工法の余盛コンクリート部は全く
生成させないで、キャップ上部の掘削孔に直接土砂礫を
埋戻し、コンクリートの養生を行う。
That is, since the cap body intended by the proposal is set to a size substantially corresponding to the extra concrete portion, as compared with the shallow cap (apparatus) disclosed in Japanese Patent Laid-Open No. 58-153816, it is far from that. It is formed on a deep cylinder, and the pile main bar is inserted through the pile main hole to the top plate of this cylinder, and the tremie pipe is penetrated through the inner cylinder to perform concrete pouring. Part is not generated at all, and the gravel and gravel is directly backfilled in the excavation hole above the cap to cure the concrete.

【0017】養生後、床掘削して土砂礫を除けば、はつ
り工事なしに直ちにキャップが露出するので、キャップ
の除去に注意すれば杭鉄筋の保護は充分である。ただ内
円筒を満たしたスライム混りコンクリートが残されるの
で、キャップとともに杭鉄筋に注意しつつ適宜の手段を
講じて除去し、併せて堆積スライム等汚物の洗浄を行
い、場所打コンクリート杭工事を終了する。
After the curing, if the floor is excavated to remove the gravel, the cap is immediately exposed without the chipping work. Therefore, it is sufficient to protect the pile rebar if the cap is carefully removed. However, since the slime-mixed concrete that fills the inner cylinder is left behind, appropriate measures are taken while removing the pile rebar together with the cap, and at the same time, dirt such as accumulated slime is washed and the cast-in-place concrete pile construction is completed. To do.

【0018】[0018]

【発明が解決しようとする課題】場所打杭の杭頭処理用
キャップは、本発明者の開発に係る前記特開平1−32
2020号公報記載のとおり、本来の杭頭の保護を目的
とするほか、従来工法に必至の余盛コンクリート部生成
を排除することにより、はつり工事を全く不要とするこ
とに大きな意義が有り、はつり工事によって生じる公
害、衛生問題を解消し、併せて工期の短縮、コンクリー
トの節約等の経済効果も大きかった。
A cap for treating pile heads of cast-in-place piles is disclosed in the above-mentioned Japanese Patent Laid-Open No. 1-32 developed by the present inventor.
As described in Japanese Patent Publication No. 2020, in addition to the purpose of protecting the original pile head, it is of great significance to eliminate the need for chipping work by eliminating the formation of excess concrete part inevitable with the conventional method. Eliminating the pollution and sanitation problems caused by the construction, the economic effects such as shortening the construction period and saving concrete were also great.

【0019】しかしながら、この工法では内円筒の上面
までコンクリート打設をしたまま土砂礫の埋戻し養生を
行うため、養生後は必ず内円筒のスライム混りコンクリ
ートを除去しなければならなかった。勿論除去工事は極
めて簡単で、このコンクリートの切り離し予定部に穴開
けし、セリ矢にて亀裂を起こさせるか、若しくはアイヨ
ンにて亀裂を起こさせ、ロープで吊り上げるだけで除去
できたが、なるべく無駄な工事は省くことが好ましい。
However, in this method, since the soil and gravel are backfilled and cured while the concrete is cast on the upper surface of the inner cylinder, the slime-mixed concrete in the inner cylinder must be removed after the curing. Of course, the removal work was extremely simple, and it was possible to remove it by simply making a hole in the part of the concrete to be cut off and causing a crack with the arrow head or a crack with an eyeon and lifting it with a rope, but it is useless as much as possible. It is preferable to omit such work.

【0020】またキャップの底板が平面であるため、コ
ンクリート打設で底面下にスライム等の堆積層が生成す
ること、更に掘削孔壁の崩壊防止のために満たす安定液
や、余分な湧出水がコンクリート打設時にスライム等を
含んで押し上げられ、キャップ内及びキャップとケーシ
ングの間隙を通過して溢出するにあたり、キャップへの
圧力を可及的に少なく、かつスムーズに通過させるため
の手段が必要であり、従来の杭主筋孔を除いて閉止され
た密蔽形のキャップに係る、これら諸問題を解消するこ
とが本発明の目的である。
Further, since the bottom plate of the cap is flat, a deposit layer of slime or the like is formed below the bottom surface when pouring concrete, and a stabilizing liquid to prevent collapse of the borehole wall and excess spring water are generated. When it is pushed up including slime when pouring concrete and overflows inside the cap and through the gap between the cap and the casing, the pressure on the cap is as small as possible and a means for smooth passage is required. Therefore, it is an object of the present invention to solve these problems associated with the close-closed cap that is closed except for the conventional main hole of the pile.

【0021】[0021]

【課題を解決するための手段】本発明は前記のような目
的を有効に達成するために、次のような構成にしてあ
る。すなわち、請求項1記載の本発明の場所打杭の杭頭
処理具は、コンクリート打設用トレミー管16が自在に
挿通可能な内円筒2を所定間隔を以て外円筒3で囲繞す
ると共に、両円筒2,3の上端を環状の天板1で、下端
を環状の底板6で夫々係着して二重円筒状のキャップ本
体Aを形成し、さらに、このキャップ本体Aの前記底板
6に所定間隔を以て複数の杭主筋孔8を穿設すると共
に、前記天板1および底板6に気液抜穴5(9)を開口
形成した構成にしてある。
In order to effectively achieve the above object, the present invention has the following structure. That is, in the pile head treating tool for cast-in-place pile according to the present invention as defined in claim 1, the inner cylinder 2 into which the tremy pipe 16 for concrete placement can be freely inserted is surrounded by the outer cylinder 3 at predetermined intervals, and both cylinders are surrounded. The upper ends of 2, 3 are attached to the annular top plate 1 and the lower ends thereof are attached to the annular bottom plate 6, respectively, to form a double cylindrical cap body A. A plurality of main pile holes 8 are formed by the above, and gas-liquid vent holes 5 (9) are formed in the top plate 1 and the bottom plate 6.

【0022】また、請求項2記載の本発明の場所打杭の
杭頭処理具は、前記請求項1記載の構成を有し、内円筒
2と外円筒3とは同一長さで天板1および底板6を水平
板状に前記両円筒2,3の上端および下端に係着した構
成にしてある。
A pile head treating tool for cast-in-place piles according to a second aspect of the present invention has the structure according to the first aspect, wherein the inner cylinder 2 and the outer cylinder 3 have the same length and the top plate 1 is provided. Further, the bottom plate 6 has a structure in which it is attached to the upper and lower ends of the cylinders 2 and 3 in a horizontal plate shape.

【0023】また、請求項3記載の本発明の場所打杭の
杭頭処理具は、外円筒3の天板1の外周縁寄りに、複数
の気液抜穴5を穿設するとともに、前記天板1の中央に
コンクリート打設用トレミー管16が自在に挿通可能な
上部トレミー口4を穿設し、この上部トレミー口4の下
側に係着し、前記外円筒3より2%乃至3%短い上下面
開放形の内円筒2を貫設して二重円筒を形成してなるキ
ャップ本体Aに於いて、前記外円筒3の底板6の外周縁
寄りの平坦域6aに、ほぼ等間隔に複数の杭主筋孔8を
穿設し、更にこの底板6の中央に穿設した下部トレミー
口7の周縁に、放射状に切り込んだ複数のスリット9
を、ほぼ等間隔にかつ前記平坦域6aを残して形成し、
更に各スリット9によって生じたスリット片9aを斜上
方に折曲し、このスリット片9aの先端を前記内円筒2
の下縁に固着して形成した構成にしてある。
In the pile head treating tool for cast-in-place pile according to the present invention as defined in claim 3, a plurality of gas-liquid drain holes 5 are formed near the outer peripheral edge of the top plate 1 of the outer cylinder 3, and An upper tremie port 4 into which a concrete placing tremie pipe 16 can be freely inserted is bored in the center of the top plate 1, and the upper tremie port 4 is engaged with the lower side of the upper tremie port 4 and the outer cylinder 3 is 2% to 3%. % In the cap body A formed by penetrating the inner cylinder 2 having a short open upper and lower surfaces to form a double cylinder, approximately equal intervals are provided in the flat region 6a of the outer cylinder 3 near the outer peripheral edge of the bottom plate 6. A plurality of main pile holes 8 are formed in the bottom of the bottom plate 6, and a plurality of slits 9 are radially cut into the periphery of the lower tremie port 7 formed in the center of the bottom plate 6.
Are formed at substantially equal intervals and leave the flat region 6a,
Further, the slit piece 9a generated by each slit 9 is bent obliquely upward, and the tip of this slit piece 9a is fixed to the inner cylinder 2
It is formed by being fixedly attached to the lower edge of the.

【0024】また、請求項4記載の本発明の場所打杭の
杭頭処理具は、前記請求項1、2または3記載の構成を
有し、天板1または/或いは底板6を、網体又はパンチ
ングメタルによって形成した構成にしてある。
A pile head treating tool for cast-in-place piles according to a fourth aspect of the present invention has the structure according to the first, second or third aspect, and the top plate 1 or / and the bottom plate 6 is a net body. Alternatively, it is made of punching metal.

【0025】また、請求項5記載の本発明の場所打杭の
杭頭処理具は、前記請求項1、2、3または4記載の構
成を有し、鉄筋篭14にキャップ本体Aを冠着すると共
に、キャップ本体Aと鉄筋篭14とを着脱自在なチエー
ンやワイヤーや紐等の索条23で縛って固着し、この鉄
筋篭14を掘削孔17に建て込むようにした杭頭処理工
法である。
A pile head treating tool for cast-in-place piles according to a fifth aspect of the present invention has the structure according to the first, second, third or fourth aspect, in which the cap main body A is attached to the rebar cage 14. At the same time, the cap body A and the rebar cage 14 are tied and fixed with a cord 23 such as a detachable chain, wire or string, and the rebar cage 14 is built in the excavation hole 17 by the pile head treatment method. is there.

【0026】また、請求項6記載の本発明の場所打杭の
杭頭処理具を使用する杭頭処理工法は、前記請求項1、
2、3、4または5記載の場所打杭の杭頭処理具を使用
し、鉄筋篭14にキャップ本体Aをスタット溶接にて冠
挿固着して掘削孔17に建て込み、次いで前記キャップ
本体Aの内円筒2を介してトレミー管16を掘削孔17
に建て込み、前記掘削孔17の底部より前記内円筒2の
天面に至るまで、連続的にコンクリート打設を行った
後、直ちにケリーバー19に取り付けた掘削バケット1
8を回転させることにより、内円筒に充填されたスライ
ム混りコンクリートを除去するようにした杭頭処理工法
である。
Further, the pile head treating method using the pile head treating tool for cast-in-place pile according to the present invention as defined in claim 6,
Using the pile head treatment tool for cast-in-place pile described in 2, 3, 4 or 5, the cap body A is staked and fixed to the rebar cage 14 by stat welding, and the cap body A is built in the excavation hole 17. The tremie pipe 16 is drilled through the inner cylinder 2 of the
The drilling bucket 1 attached to the kerry bar 19 immediately after the concrete is continuously placed from the bottom of the drilling hole 17 to the top surface of the inner cylinder 2.
It is a pile head processing method in which the slime-mixed concrete filled in the inner cylinder is removed by rotating 8.

【0027】[0027]

【発明の実施の形態】次に本発明の実施の形態について
説明する。図1〜図7に示すように、外円筒3の天板1
の中央に、コンクリート打設用トレミー管16を自在に
挿入できる円形の上部トレミー口4を穿設し、この上部
トレミー口4の下側に係着して外円筒3より僅かに短い
上下開放形の内円筒2を貫設すると、二重円筒形の底面
を除いたキャップ本体Aが形成される。前期外円筒3の
天板1の周縁寄りには複数の気液抜穴5を適宜穿設し、
外円筒3の底板6の中央に前記上部トレミー口4とほぼ
相似形の下部トレミー口7を穿設する。
BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. As shown in FIGS. 1 to 7, the top plate 1 of the outer cylinder 3
A circular upper tremie port 4 into which a concrete pouring tremie pipe 16 can be freely inserted is bored in the center of the upper end of the upper tremie port 4 and the upper open tremie port 4 is slightly shorter than the outer cylinder 3 and is open vertically. When the inner cylinder 2 is penetrated, the cap body A excluding the bottom surface of the double cylinder is formed. A plurality of gas-liquid vent holes 5 are appropriately formed near the periphery of the top plate 1 of the outer cylinder 3 in the previous term.
At the center of the bottom plate 6 of the outer cylinder 3, a lower tremie port 7 having a shape similar to the upper tremie port 4 is formed.

【0028】更に底板6の周縁寄りに鉄筋篭14を形成
する杭主筋11を挿入するための杭主筋孔8を、ほぼ等
間隔に穿設するとともに、各杭主筋孔8の中間位置に於
いて、下部トレミー口7より外方向放射状に、ほぼ等間
隔かつ外周縁寄りの適宜幅の平坦域6aを残し、切断し
てスリット9を形成する。
Further, near the periphery of the bottom plate 6, main pile holes 8 for inserting the main pile bars 11 forming the reinforcing bar cage 14 are formed at substantially equal intervals, and at the intermediate position of each main pile hole 8. The slits 9 are formed by cutting the flat plate 6a radially outward from the lower tremie opening 7 and having a proper width near the outer peripheral edge and having an appropriate width.

【0029】よって生じたスリット片9aを斜上方に折
曲し、その先端を内円筒2の下端周縁に溶着することに
より、本発明のキャップ本体Aは完成する。そして外観
構成上の特徴としてキャップ本体Aの底面に放射状空隙
を有する断面逆皿状の底部空間10が形成されること
で、その効果はコンクリート打設に際しスリット9の隙
間と天板1の気液抜穴5とによって、外円筒3と内円筒
2との間に空気や泥水のスムーズな流通が可能となり、
下方よりの圧力が軽減し、従前底板付近でスライム・レ
イタンス等の不純物が滞留し、堆積層の生成を余儀なく
されたが、本発明によってこれ等欠点は改善された。
The slit piece 9a thus formed is bent obliquely upward, and the tip of the slit piece 9a is welded to the peripheral edge of the lower end of the inner cylinder 2 to complete the cap body A of the present invention. As a characteristic of the external structure, a bottom space 10 having a reverse dish shape having a radial gap is formed on the bottom surface of the cap body A, and the effect is that the gap between the slit 9 and the gas-liquid of the top plate 1 at the time of concrete pouring. With the hole 5, it becomes possible to smoothly flow air or muddy water between the outer cylinder 3 and the inner cylinder 2,
The pressure from the lower side was reduced, and impurities such as slime and latance accumulated in the vicinity of the bottom plate in the past, forcing the formation of a deposited layer. However, the present invention alleviated these drawbacks.

【0030】さて、本発明のキャップ本体Aを冠挿固着
した鉄筋篭14を掘削孔17に建込み、トレミー管16
を介してコンクリートを掘削孔17の底部から連続的に
打設して鉄筋コンクリート杭を築造するのであるが、本
発明者が繰り返し実験を重ねた結果、内円筒天面を越す
コンクリート打設は不可欠であるが、打設終了後直ちに
掘削工法を利用して、例えばケリーバー19に掘削バケ
ット18またはスライムバケットを取り付け、ケリーバ
ー19の回転によって容易にスライム混りコンクリート
を除去することを可能にした。
Now, the rebar cage 14 having the cap body A of the present invention inserted and fixed therein is installed in the excavation hole 17, and the tremie pipe 16 is provided.
The concrete is continuously cast from the bottom of the drill hole 17 to construct the reinforced concrete pile. However, as a result of repeated experiments by the present inventor, it is indispensable to place concrete over the inner cylindrical top surface. However, by using the excavation method immediately after the completion of the pouring, for example, the excavation bucket 18 or the slime bucket is attached to the kelly bar 19, and the rotation of the kelly bar 19 makes it possible to easily remove the concrete mixed with the slime.

【0031】続いてキャップ本体Aの上面を適宜の蓋で
カバーし、ケーシング13の引き揚げ等以後は常法より
土砂礫の埋戻し、養生を行う。養生終了後、床掘削して
土砂礫を除去し、キャップ本体Aを露出させ、ガスバー
ナーによる溶断及びパワーショベル等適宜の機械的手段
を講じキャップ本体Aは鉄筋篭14から容易に離脱する
ことができる。本発明によって以上の通り処理すれば、
はつり工事は全く不要であり、杭主筋11の保護も充分
果たすことが可能で、従来の技術的問題点は全て解消さ
れ、多大の経済効果をもたらすものである。
Subsequently, the upper surface of the cap body A is covered with an appropriate lid, and after the casing 13 is lifted up, gravel and gravel is backfilled and cured by a conventional method. After completion of curing, floor excavation is performed to remove debris, the cap body A is exposed, and appropriate mechanical means such as fusing with a gas burner and a power shovel are taken, so that the cap body A can be easily separated from the rebar cage 14. it can. According to the present invention, as described above,
No chipping work is required, protection of the pile main bar 11 can be sufficiently fulfilled, all the conventional technical problems are solved, and a great economic effect is brought about.

【0032】[0032]

【実施例】以下、本発明の実施例を図に基づいて説明す
る。図1は本発明のキャップ本体Aの斜視図、図2は同
じく一部切欠斜視図、図3は外円筒3の底板6の平面
図、図4はキャップ本体Aの一部切欠縦断面図、図5及
び図6は使用状態を示す説明図、図7はコンクリート打
設後の内円筒のスライム混りコンクリートを除去する状
態を示す説明図、図8は本発明のキャップ本体Aの他の
実施例を示す一部切欠斜視図、図9は本発明のキャップ
本体Aの別の実施例を示す一部切欠斜視図、図10は本
発明のキャップ本体Aのまた別の実施例を示す一部切欠
斜視図、図11は本発明のキャップ本体Aの他の実施例
の斜視図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a perspective view of a cap body A of the present invention, FIG. 2 is a partially cutaway perspective view thereof, FIG. 3 is a plan view of a bottom plate 6 of an outer cylinder 3, and FIG. 4 is a partially cutaway vertical sectional view of a cap body A. 5 and 6 are explanatory views showing a usage state, FIG. 7 is an explanatory view showing a state of removing the inner cylinder slime-mixed concrete after the concrete is cast, and FIG. 8 is another embodiment of the cap body A of the present invention. 9 is a partially cutaway perspective view showing an example, FIG. 9 is a partially cutaway perspective view showing another embodiment of the cap body A of the present invention, and FIG. 10 is a part showing another embodiment of the cap body A of the present invention. FIG. 11 is a cutaway perspective view, and FIG. 11 is a perspective view of another embodiment of the cap body A of the present invention.

【0033】図1〜図3に示すようにキャップ本体A
は、中央に上部トレミー口4を穿設した環状の天板1
と、この天板1の内周縁に接合する内円筒2と、天板1
の外周縁に接合する外円筒3と、中央に下部トレミー口
7を穿設した環状の底板6とからなり、底板6の内周縁
は内円筒2の内周面に接合され、底板6の外周縁は外周
筒3の底周面に接合された二重円筒形状のものである。
As shown in FIGS. 1 to 3, the cap body A
Is an annular top plate 1 with an upper tremie opening 4 in the center
And an inner cylinder 2 joined to the inner peripheral edge of the top plate 1, and the top plate 1.
The outer cylinder 3 is joined to the outer peripheral edge of the inner cylinder 2, and the annular bottom plate 6 is formed with a lower tremie port 7 in the center. The inner peripheral edge of the bottom plate 6 is joined to the inner peripheral surface of the inner cylinder 2, The peripheral edge has a double cylindrical shape joined to the bottom peripheral surface of the outer peripheral cylinder 3.

【0034】また、内円筒2は外円筒3より通常2%乃
至3%短く形成されている。上部トレミー口4と下部ト
レミー口7との直径差とも関連して設定するが、スリッ
ト9の間隔の大小も併せ勘案する。
The inner cylinder 2 is usually shorter than the outer cylinder 3 by 2% to 3%. Although it is set in relation to the diameter difference between the upper tremie port 4 and the lower tremie port 7, the size of the gap between the slits 9 is also taken into consideration.

【0035】キャップ本体Aの大きさは、掘削孔7(図
6参照)の規模によって設定される鉄筋篭14の直径、
杭主筋11の太さと本数等によって定まる。また掘削孔
17内における鉄筋篭14の頭部露出部14a(建造物
の基礎構築ベースとなる)は、通常杭主筋11の直径の
40倍乃至それ以上とし、この頭部露出部14aが従来
工法の余盛コンクリート部に相当するので、本発明のキ
ャップ本体Aの高さはこの頭部露出部14aの寸法に応
じて調整すればよい。
The size of the cap body A is the diameter of the rebar cage 14 which is set according to the scale of the excavation hole 7 (see FIG. 6).
It is determined by the thickness and the number of main pile reinforcements 11. Further, the exposed head portion 14a of the rebar cage 14 (which serves as a base for constructing the foundation of the building) in the excavation hole 17 is usually 40 times or more the diameter of the main pile reinforcement 11, and the exposed head portion 14a is formed by the conventional method. The height of the cap body A of the present invention may be adjusted according to the size of the exposed head portion 14a.

【0036】キャップ本体に使用する材料は、埋戻しや
再掘削に対する防護力と、再掘削後の除去手段を考慮し
て厚さ1.6mm乃至3.2mmの軟鋼板が好ましい。勿
論、鋼板に限定されるものではなく、合成樹脂材や他の
金属材によって形成してもよい。キャップ本体Aは次の
順序で作成する。
The material used for the cap body is preferably a mild steel plate having a thickness of 1.6 mm to 3.2 mm in consideration of protection against backfilling and re-drilling and removal means after the re-drilling. Of course, the material is not limited to a steel plate, and it may be formed of a synthetic resin material or another metal material. The cap body A is created in the following order.

【0037】図2に示すように同径の円形天板1及び底
板6を作成し、天板1の中央にコンクリート打設用トレ
ミー管16(図6参照)が自在に貫入できる円形の上部
トレミー口4を穿設し、同天板1の外周縁寄りに複数の
気液抜穴5を穿設する。この気液抜穴5は天板1の大き
さによって適宜その直径,数を変更すればよい。一般に
直径10mm乃至20mm、4ヶ乃至8ヶが適当である。
As shown in FIG. 2, a circular top plate 1 and a bottom plate 6 having the same diameter are prepared, and a tremy pipe 16 for concrete placing (see FIG. 6) can be freely inserted into the center of the top plate 1 to provide a circular upper tremy. A port 4 is bored, and a plurality of gas / liquid vent holes 5 are bored near the outer peripheral edge of the top plate 1. The diameter and number of the gas-liquid drain holes 5 may be changed as appropriate depending on the size of the top plate 1. Generally, a diameter of 10 mm to 20 mm and 4 to 8 are suitable.

【0038】また、図3に示すように底板6の外周縁寄
りに適宜幅(通常90mm前後)の平坦域6aを設け、こ
の平坦域6aに鉄筋篭14を形成する杭主筋11を挿入
するための杭主筋孔8をほぼ等間隔に穿設されている。
この杭主筋孔8の直径は、挿通する杭主筋11の太さの
1.3倍乃至1.5倍位の大きさにして、ある程度の余
裕を保たせることが好ましい。
Further, as shown in FIG. 3, a flat area 6a having an appropriate width (usually around 90 mm) is provided near the outer peripheral edge of the bottom plate 6, and the pile main bar 11 forming the rebar cage 14 is inserted into the flat area 6a. The main hole 8 of the pile is drilled at substantially equal intervals.
It is preferable that the diameter of the main pile hole 8 is set to 1.3 to 1.5 times the thickness of the main pile 11 to be inserted so that a certain margin can be maintained.

【0039】次いで底板6の中央に前記天板1と同様の
下部トレミー口7を穿設するが、このトレミー口の直径
は上部トレミー口4より2%乃至5%小さくする。即ち
下部トレミー口7には、その周縁に前記平坦域6aを残
して放射状かつほぼ等間隔に切り込んでスリット9を形
成し、各々スリット片9aを斜上方に折曲して平坦域と
の角度θを25度乃至30度になるよう傾斜させると、
その先端縁は上部トレミー口とほぼ同一径となり、この
先端縁を前記内円筒2の下端開放口周縁に溶着させるこ
とにより、図4に示す放射状空隙を備えた断面が浅い逆
皿状の空間を底面に形成することができる。
Next, a lower tremie port 7 similar to that of the top plate 1 is bored in the center of the bottom plate 6, but the diameter of this tremie port is made 2% to 5% smaller than that of the upper tremie port 4. That is, slits 9 are formed in the lower tremie mouth 7 by cutting the slits 9a radially and at substantially equal intervals while leaving the flat area 6a on the periphery, and each slit piece 9a is bent obliquely upward to form an angle θ with the flat area. When tilted at 25 to 30 degrees,
Its tip edge has almost the same diameter as the upper tremie port, and by welding this tip edge to the peripheral edge of the lower end opening of the inner cylinder 2, a reverse dish-shaped space having a radial cross section shown in FIG. It can be formed on the bottom surface.

【0040】このような構成によりキャップ本体Aは二
重円筒形に一体化され、このキャップ本体Aの底面は前
記のとおり浅い逆皿状空間を呈し、しかも前記スリット
9と杭主筋8の隙間が生成するため、施工時に内円筒2
と外円筒3の間に空気や泥水が流入し、前記天板1の気
液抜穴5と併せ掘削孔17から押し上って来る気体や液
体の圧力を滅殺する効果大であり、また前記した逆皿状
の底面には従来のようなスライム堆積層は生成しないと
言う効果も得られる。
With this structure, the cap body A is integrated into a double cylinder, and the bottom surface of the cap body A has a shallow inverted dish-like space as described above, and the gap between the slit 9 and the pile main bar 8 is large. In order to generate, the inner cylinder 2 during construction
Air and muddy water flow between the outer cylinder 3 and the outer cylinder 3, and the pressure of the gas or liquid that is pushed up from the excavation hole 17 together with the gas-liquid vent hole 5 of the top plate 1 is effectively eliminated. It is also possible to obtain the effect that the slime deposit layer is not formed on the bottom surface of the inverted dish shape as described above.

【0041】前記のキャップ本体Aは、前記基本構成に
基づき予め各要部を準備し、一般に天板1の中央下面に
先ず内円筒2を吊設し、この内円筒2の下端に底部の下
部トレミー口7を取り付け、最後に天板1と底板6の外
周縁に外円筒3を取り付ける。本発明に於ける溶着はす
べてスタット鎔接を採用し、キャップ本体Aに可能な限
り隙間を生成するよう考慮すると共にコンクリート打設
後のキャップ本体Aの除去を容易にした。
The cap main body A is prepared by preparing each main part based on the above-mentioned basic structure. Generally, the inner cylinder 2 is first hung on the central lower surface of the top plate 1, and the bottom of the bottom is formed at the lower end of the inner cylinder 2. The tremie port 7 is attached, and finally the outer cylinder 3 is attached to the outer peripheral edges of the top plate 1 and the bottom plate 6. The welding in the present invention employs stat-welding for all welding, and it is considered that a gap is formed in the cap body A as much as possible, and the removal of the cap body A after placing concrete is facilitated.

【0042】キャップ本体Aと鉄筋篭14との組み合わ
せは、通常キャップ本体Aの底板6に穿設された杭主筋
孔8を介して杭主筋11を天板に達するまで挿入し、
(図5参照)、以後、横筋15を杭主筋11にスタット
溶接にて巻装しながら鉄筋篭14を形成し、最後にキャ
ップ本体Aの底板6に近接した横筋15を底板の所々に
スタット溶接して固着し完成する。
The combination of the cap main body A and the reinforcing bar cage 14 is such that the main pile bar 11 is inserted through the main pile hole 8 formed in the bottom plate 6 of the main cap body A until it reaches the top plate.
(Refer to FIG. 5) After that, the reinforcing bar cage 14 is formed while winding the horizontal bar 15 around the pile main bar 11 by stat welding, and finally, the horizontal bar 15 close to the bottom plate 6 of the cap body A is stat welded to the bottom plate in some places. Then it is fixed and completed.

【0043】何れにせよ適宜の手段でキャップ本体Aを
鉄筋篭14に冠挿固着した後、図6に示すように掘削孔
17にこの鉄筋篭14を建て込み、必要に応じて二次ス
ライム処理等を施した後、内円筒2を介してトレミー管
16を建て込み、掘削孔17の底部より連続的にコンク
リート打設を行い、キャップ本体Aの内円筒2の天面を
超えたところでコンクリート打設を終える。
In any case, after the cap body A is inserted and fixed to the rebar cage 14 by an appropriate means, the rebar cage 14 is built in the excavation hole 17 as shown in FIG. 6, and the secondary slime treatment is carried out if necessary. Etc., the tremie pipe 16 is built through the inner cylinder 2, concrete is continuously poured from the bottom of the excavation hole 17, and the concrete is poured where the top surface of the inner cylinder 2 of the cap body A is exceeded. Complete the setup.

【0044】コンクリート打設を終了後、図7に示すよ
うに直ちにケリーバー19に掘削バケット18、又は工
事現場の状況によってはスライムバケットを取り付け、
ケリーバー19の回転によって内円筒2に充填してある
スライム混りコンクリートを、キャップ底部まで除去す
る。終わって掘削孔17を保護しているケーシング13
を引き抜き、キャップ本体Aの上に適宜の蓋を冠し土砂
礫を埋戻した後、所要期間のコンクリート養生を行う。
Immediately after the concrete pouring is completed, as shown in FIG. 7, the excavation bucket 18 or the slime bucket is attached to the kelly bar 19 depending on the situation of the construction site.
The slime-mixed concrete filled in the inner cylinder 2 is removed to the bottom of the cap by the rotation of the kelly bar 19. The casing 13 which protects the drill hole 17 after completion
Is removed, a suitable lid is put on the cap body A, and the gravel and gravel is backfilled, and then concrete curing is performed for a required period.

【0045】養生を済ませると、基礎の床掘削を行って
再び土砂礫を除去し、そこに現出した杭頭キャップ本体
Aは、パワーショベル等の機械作業によって先ず天板1
を剥がし、続いて外円筒3、内円筒2を逐次引き裂いて
剥がすことができる。即ち前記したスタット溶接が功を
奏しているわけで、次に底板6は、2乃至3ヶ所のスリ
ット部をガスバーナーで溶断して簡単に除去することが
できる。キャップ本体Aの製作にスタット溶接を採用し
たため、製作時間が短縮し、併せて除去作業が容易にな
り、従って経済効果もそれだけ高めることができる。
When the curing is completed, the foundation floor is excavated to remove the gravel and gravel again, and the pile head cap main body A exposed there is first subjected to mechanical work such as a power shovel and the like.
The outer cylinder 3 and the inner cylinder 2 can be successively torn and peeled off. That is, the above-mentioned stat welding is successful, and the bottom plate 6 can be easily removed by fusing the slit portions at 2 to 3 places with a gas burner. Since the stat welding is used for manufacturing the cap body A, the manufacturing time is shortened, the removal work is facilitated, and the economic effect can be enhanced accordingly.

【0046】かくてキャップ本体Aによって保護された
杭主筋11の頭部は安全に露出し、所期の目的が達成さ
れ、最後にコンクリート残渣やスライム、レイタンス等
の不要物を高圧水にて洗浄し、杭頭処理工事が完了す
る。
Thus, the head of the pile main bar 11 protected by the cap body A is safely exposed, the intended purpose is achieved, and finally, unnecessary substances such as concrete residue, slime, and leitance are washed with high pressure water. Then, the pile head treatment work is completed.

【0047】図8は別の実施例を示すキャップ本体Aで
あって、この実施例の天板1はパンチングメタルによっ
て形成され、多数の孔5aが穿設されていて、前記した
ように施工時に内円筒2と外円筒3との間に流入した空
気や泥水をこの孔5aからスムーズに流通させることが
できる。また、底板6には前記実施例と同様に主筋孔8
とスリット9が形成されている。尚、内円筒2と外円筒
3との長さは、前記実施例と同様に内円筒2を外円筒3
より短く形成するも、或いは内円筒2と外円筒3の長さ
を同寸にしてもよい。同寸の場合は底板6は水平板状に
内円筒2および外円筒3の下端に設けられる。このキャ
ップ本体Aの使用の方法に付いては前記実施例と同様で
あり説明を省略する。尚、前記したパンチングメタル以
外に網体、そのた気液を流通させる加工を施した部材で
あれば、強度的、安全上、コスト的に問題がなければ如
何なるものを使用してもよい。
FIG. 8 shows a cap body A showing another embodiment. The top plate 1 of this embodiment is made of punching metal and has a large number of holes 5a. Air and muddy water that have flowed in between the inner cylinder 2 and the outer cylinder 3 can be smoothly circulated through the holes 5a. Further, the main plate hole 8 is formed in the bottom plate 6 as in the above embodiment.
And the slit 9 is formed. The lengths of the inner cylinder 2 and the outer cylinder 3 are the same as those in the above-mentioned embodiment.
Alternatively, the inner cylinder 2 and the outer cylinder 3 may have the same length. In the case of the same size, the bottom plate 6 is provided at the lower ends of the inner cylinder 2 and the outer cylinder 3 in a horizontal plate shape. The method of using the cap body A is the same as that of the above-mentioned embodiment, and the description thereof is omitted. In addition to the punching metal described above, any member may be used as long as it has no problem in terms of strength, safety, and cost, as long as it is a mesh member and a member that has been processed to allow gas and liquid to flow therethrough.

【0048】次に図9はまた別の実施例を示すキャップ
本体Aであって、この実施例では天板1にスリット9a
が形成されていて、施工時に内円筒2と外円筒3との間
に流入した空気や泥水をこのスリット9aからスムーズ
に流通させることができるようにしてある。他の構成は
前記実施例と同様であり説明を省略する。
Next, FIG. 9 shows a cap body A showing another embodiment, in which the slit 9a is formed in the top plate 1.
Is formed so that air and muddy water that have flowed in between the inner cylinder 2 and the outer cylinder 3 at the time of construction can be smoothly circulated from the slit 9a. The rest of the configuration is the same as that of the above-mentioned embodiment, and the explanation is omitted.

【0049】次に図10はさらに別の実施例を示すキャ
ップ本体Aであって、この実施例では天板1に気液抜孔
5が形成され、底板6には主筋孔8と共に前記スリット
9に相当する孔5cが穿設されている。他の構成は前記
実施例と同様であり説明を省略する。
Next, FIG. 10 shows a cap body A showing still another embodiment. In this embodiment, a gas / liquid vent hole 5 is formed in a top plate 1, and a bottom plate 6 is formed in the slit 9 together with a main muscle hole 8. Corresponding hole 5c is formed. The rest of the configuration is the same as that of the above-mentioned embodiment, and the explanation is omitted.

【0050】尚、前記した各々実施例の内円筒2と外円
筒3との長さを同一にするも、或いは内円筒2を外円筒
3より短くしてもよい。また、底板6に主筋孔8を形成
することは各実施例とも共通しているが、天板1および
底板6に形成するスリットや孔は、前記実施例に限定さ
れずに種々の形状、数、に変更するも自由であり、気液
を抜ける形状であれば如何なる形態で合ってもよい。
The inner cylinder 2 and the outer cylinder 3 of each of the above-described embodiments may have the same length, or the inner cylinder 2 may be shorter than the outer cylinder 3. Although forming the main hole 8 in the bottom plate 6 is common to each of the embodiments, the slits and holes formed in the top plate 1 and the bottom plate 6 are not limited to those in the above-mentioned embodiments, and have various shapes and numbers. Can be freely changed to any shape as long as the shape allows gas and liquid to escape.

【0051】図11は前記して種々の実施例のキャップ
本体A(図は一例を示す)の外円筒3の下端寄りの外周
面に係止部20が設けられている。この実施例では係止
部20としてボルト20aが外円筒3に設けたネジ孔に
ネジ込んで取り付けてある。この各々ボルト20aには
針金や紐等からなる係止線材21(連結部材)の一端を
結びつけてある。
In FIG. 11, the engaging portion 20 is provided on the outer peripheral surface of the outer cylinder 3 of the cap main body A (the figure shows an example) of various embodiments as described above. In this embodiment, a bolt 20a is attached as a locking portion 20 by screwing it into a screw hole provided in the outer cylinder 3. One end of a locking wire 21 (connecting member) made of wire or string is tied to each of the bolts 20a.

【0052】このキャップ本体Aを鉄筋篭14に被せた
時に、上記係止線材21の他端を鉄筋篭14の横筋15
に結び付けてキャップ本体Aを鉄筋篭14に固定する。
このことにより、施工時にキャップ本体Aに対して気液
によるの上方への持ち上げ力が作用しても、前記したス
リットや気液抜穴の作用と共に係止線材21による固定
により、キャップ本体Aの上方への持ち上がりをさらに
確実に防ぐことができる。
When the cap body A is put on the rebar cage 14, the other end of the locking wire 21 is attached to the transverse bar 15 of the rebar cage 14.
The cap body A is fixed to the rebar cage 14 by tying to.
As a result, even if an upward lifting force of gas and liquid acts on the cap body A at the time of construction, the cap wire A is fixed by the locking wire rod 21 together with the action of the slits and the gas / liquid drain hole described above. It is possible to more surely prevent upward lifting.

【0053】図12は別の実施例の工法を示す図であっ
て、キャップ本体Aを鉄筋篭14の頭部に冠着して固定
するのに索条23として2本のチエーン23a、23b
を用いて行う。すなわち、鉄筋篭14の頭部に冠着した
キャップ本体Aの外円筒3の外周面に沿って1本のチエ
ーン23aを垂らすと共に、このチエーン23aを鉄筋
篭14の横筋15に引っ掛け、さらに内円筒2の内周面
に沿って上方に延ばし、このチエーン23aの両端のフ
ック24a、24bを同じチエーン23aに係止する。
同様にしてもう一方のチエーン23bも図示のように上
記チエーン23aと対向する位置に設ける。尚、索条2
3としては、チエーン以外にもワイヤーや紐、太い針
金、その他、鉄筋篭14の横筋15に引っ掛けてキャッ
プ本体Aを固定できるものであれば如何なるものであっ
てもよい。
FIG. 12 is a view showing a construction method of another embodiment, in which two chains 23a and 23b are used as the cords 23 for fixing the cap body A to the head of the rebar cage 14 by fixing it.
Using. That is, one chain 23a is hung along the outer peripheral surface of the outer cylinder 3 of the cap body A attached to the head of the rebar cage 14, and the chain 23a is hooked on the lateral bar 15 of the rebar cage 14 to further The hooks 24a and 24b on both ends of the chain 23a are locked to the same chain 23a by extending upward along the inner peripheral surface of the chain 23a.
Similarly, the other chain 23b is also provided at a position facing the above chain 23a as shown in the drawing. In addition, line 2
As the wire 3, other than the chain, any wire, string, thick wire, or any other material that can be hooked to the horizontal bar 15 of the rebar cage 14 to fix the cap body A may be used.

【0054】このようにしてキャップ本体Aを鉄筋篭1
4に固定する。このことにより、前記実施例と同様に施
工時にキャップ本体Aに対して気液による上方への持ち
上げ力が作用しても、前記したスリットや気液抜穴の作
用と共にチェーン23a、23bによる固定により、キ
ャップ本体Aの上方への持ち上がりをさらに確実に防ぐ
ことができる。
In this way, the cap body A is rebar cage 1
Fix at 4. As a result, even if the cap body A is lifted upward by gas and liquid at the time of construction as in the case of the above-mentioned embodiment, it is fixed by the chains 23a and 23b together with the above-mentioned action of the slits and gas and liquid drain holes. It is possible to more reliably prevent the cap body A from being lifted up.

【0055】また、この実施例のキャップ本体Aでは、
コンクリート打設後にケーシング13(図7参照)を引
き抜く場合に、ケーシング13が前記実施例のような多
数のボルト20a(図11参照)に引っ掛かかって引上
げにくいといったこともなくなる。
In the cap body A of this embodiment,
When the casing 13 (see FIG. 7) is pulled out after the concrete is poured, the casing 13 is unlikely to be caught by the large number of bolts 20a (see FIG. 11) as in the above-described embodiment and difficult to pull up.

【0056】[0056]

【発明の効果】以上、上述のように請求項1記載の本発
明の場所打杭の杭頭処理具では、コンクリート養生後の
はつり作業は一切不要となり、これに伴う公害源や労働
災害の原因はすべて排除することができる。また、キャ
ップ本体の底面下に堆積したスライム層も無くなり、コ
ンクリート打設時の押し上って来る空気や泥水が、キャ
ップ本体内をスムーズに通過して流出するようになって
コンクリート打設作業が捗るようになる。
As described above, in the pile head treating tool for cast-in-place piles according to the present invention as described above, no chipping work is required after concrete curing, which causes a pollution source or an industrial accident. Can be eliminated altogether. In addition, the slime layer deposited under the bottom of the cap body is also eliminated, and the air and muddy water that rises up during concrete pouring can smoothly pass through the cap body and flow out, making concrete pouring work easier. It will get better.

【0057】また、請求項2記載の本発明の場所打杭の
杭頭処理具では、天板および底板を水平板状にして内円
筒および外円筒に係着するようにしてあるため、キャッ
プ本体の各部品の加工、製作を容易に行うことができ
る。
Further, in the pile head treating tool for cast-in-place pile according to the present invention, since the top plate and the bottom plate are formed into horizontal plates and are attached to the inner cylinder and the outer cylinder, the cap body is provided. Can be easily processed and manufactured.

【0058】また、請求項3記載の本発明の場所打杭の
杭頭処理具は、キャップ本体の底面に浅い逆皿状空間を
呈し、しかもスリットと、杭主筋と杭主筋孔との隙間が
形成されるため、これらのスリットや隙間から施工時に
内円筒と外円筒の間に空気や泥水が流入し、天板に穿設
した気液抜穴と併せて、掘削孔から押し上って来る気体
や液体の圧力を滅殺することができる。また、底板は逆
皿状に形成されるためスライム堆積層は生成しない。
Further, the pile head treating tool for cast-in-place pile of the present invention according to claim 3 presents a shallow inverted dish-like space on the bottom surface of the cap body, and moreover, the slit and the gap between the pile main bar and the main pile hole are formed. Since it is formed, air and muddy water flow between the inner cylinder and the outer cylinder during construction through these slits and gaps, and push up from the excavation hole along with the gas-liquid vent hole drilled in the top plate. The pressure of gas or liquid can be eliminated. Further, since the bottom plate is formed in an inverted dish shape, a slime deposit layer is not formed.

【0059】また、請求項4記載の本発明の場所打杭の
杭頭処理具では、天板または/或いは底板を網体又はパ
ンチングメタルによって形成することにより、天板また
は/或いは底板への気液抜孔加工を施す作業を無くすこ
とができ、より安価にキャップ本体を製作することがで
きる。
Further, in the pile head treating tool for cast-in-place pile of the present invention as defined in claim 4, the ceiling plate and / or the bottom plate is formed of a net or punching metal, so that the ceiling plate and / or the bottom plate is exposed to air. It is possible to eliminate the work of performing the drainage process, and it is possible to manufacture the cap body at a lower cost.

【0060】また、請求項5記載の本発明の場所打杭の
杭頭処理具を使用する杭頭処理工法では、施工時にキャ
ップ本体と鉄筋篭とを連結部材で連結することができる
ため、キャップ本体が掘削孔から押し上がってくる気液
によって浮き上がるといったことをさらに確実に抑制す
ることができる。
In the pile head processing method using the pile head processing tool for cast-in-place pile according to the present invention, the cap body and the rebar cage can be connected by the connecting member at the time of construction. It is possible to more surely prevent the main body from being lifted up by the gas and liquid pushing up from the drill hole.

【0061】また、請求項6記載の本発明の場所打杭の
杭頭処理具を使用する杭頭処理工法では、鉄筋篭の杭主
筋の頭部はキャップ本体によって保護されるため、杭主
筋頭部を傷めるといったことがなく、しかもキャップ本
体の天板および底板に形成した気液抜穴(含むスリッ
ト)によって下からの気液圧力を逃がすことができ、場
所打杭の施工作業を安全に且つ効率良くスムーズに行う
ことができる。
In the pile head treatment method using the pile head treatment tool for cast-in-place piles according to the sixth aspect of the present invention, the head of the main reinforcement of the reinforcing bar cage is protected by the cap body. It does not damage the parts, and the gas-liquid pressure holes (including slits) formed in the top and bottom plates of the cap body allow the gas-liquid pressure from the bottom to escape, making the construction work of cast-in-place pile safe and safe. It can be done efficiently and smoothly.

【図面の簡単な説明】[Brief description of drawings]

【図1】キャップ本体の斜視図である。FIG. 1 is a perspective view of a cap body.

【図2】キャップ本体の一部切欠斜視図である。FIG. 2 is a partially cutaway perspective view of a cap body.

【図3】外円筒の底板の折曲前平面図である。FIG. 3 is a plan view of the bottom plate of the outer cylinder before bending.

【図4】キャップ本体の一部切欠縦断面図である。FIG. 4 is a partially cutaway vertical sectional view of a cap body.

【図5】キャップ本体の使用状態の説明図である。FIG. 5 is an explanatory diagram of a usage state of the cap body.

【図6】同じく使用状態の説明図である。FIG. 6 is likewise an explanatory view of a usage state.

【図7】内円筒のコンクリートを除去する説明図であ
る。
FIG. 7 is an explanatory diagram for removing concrete in the inner cylinder.

【図8】キャップ本体Aの他の実施例を示す一部切欠斜
視図である。
8 is a partially cutaway perspective view showing another embodiment of the cap body A. FIG.

【図9】キャップ本体Aの別の実施例を示す一部切欠斜
視図である。
9 is a partially cutaway perspective view showing another embodiment of the cap body A. FIG.

【図10】キャップ本体Aのまた別の実施例を示す一部
切欠斜視図である。
10 is a partially cutaway perspective view showing another embodiment of the cap body A. FIG.

【図11】キャップ本体Aの他の実施例の斜視図であ
る。
11 is a perspective view of another embodiment of the cap body A. FIG.

【図12】施工時の別の実施例の要部斜視図である。FIG. 12 is a perspective view of an essential part of another embodiment during construction.

【符号の説明】[Explanation of symbols]

A キャップ本体 1 天板 2 内円筒 3 外円筒 4 上部トレミー口 5 気液抜孔 6 底板 6a 平坦域 7 下部トレミー口 8 杭主筋孔 9 スリット 9a スリット片 10 底部空間 11 杭主筋 12 皿縁 13 ケーシング 14 鉄筋篭 15 横筋 16 トレミー管 17 掘削孔 18 バケット 19 ケリーバー 21 索条 21aチェーン 21bチェーン A Cap body 1 Top plate 2 Inner cylinder 3 Outer cylinder 4 Upper tremie port 5 Gas-liquid vent hole 6 Bottom plate 6a Flat area 7 Lower tremie port 8 Pillar main hole 9 Slit 9a Slit piece 10 Bottom space 11 Pillar main bar 12 Plate edge 13 Casing 14 Reinforcing bar cage 15 Horizontal bars 16 Tremy tube 17 Drilling hole 18 Bucket 19 Kelly bar 21 Rope 21a chain 21b chain

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 コンクリート打設用トレミー管16が自
在に挿通可能な内円筒2を所定間隔を以て外円筒3で囲
繞すると共に、両円筒2,3の上端を環状の天板1で、
下端を環状の底板6で夫々係着して二重円筒状のキャッ
プ本体Aを形成し、さらに、このキャップ本体Aの前記
底板6に所定間隔を以て複数の杭主筋孔8を穿設すると
共に、前記天板1および底板6に気液抜穴5(9)を開
口形成したことを特徴とする場所打杭の杭頭処理具。
1. An inner cylinder 2 into which a concrete placing tremie pipe 16 can be freely inserted is surrounded by an outer cylinder 3 at a predetermined interval, and the upper ends of both cylinders 2 and 3 are annular top plates 1,
The lower ends of the cap body A are attached to each other by an annular bottom plate 6 to form a double-cylindrical cap body A. Further, a plurality of main pile holes 8 are formed in the bottom plate 6 of the cap body A at predetermined intervals. A pile head treatment tool for cast-in-place piles, characterized in that gas-liquid drain holes 5 (9) are formed in the top plate 1 and the bottom plate 6.
【請求項2】 内円筒2と外円筒3とは同一長さで天板
1および底板6を水平板状に前記両円筒2,3の上端お
よび下端に係着したことを特徴とする請求項1記載の場
所打杭の杭頭処理具。
2. The inner cylinder 2 and the outer cylinder 3 have the same length, and the top plate 1 and the bottom plate 6 are attached to the upper and lower ends of the cylinders 2 and 3 in a horizontal plate shape. 1. A pile head treatment tool for in-place pile driving.
【請求項3】 外円筒3の天板1の外周縁寄りに、複数
の気液抜穴5を穿設するとともに、前記天板1の中央に
コンクリート打設用トレミー管16が自在に挿通可能な
上部トレミー口4を穿設し、この上部トレミー口4の下
側に係着し、前記外円筒3より2%乃至3%短い上下面
開放形の内円筒2を貫設して二重円筒を形成してなるキ
ャップ本体Aに於いて、前記外円筒3の底板6の外周縁
寄りの平坦域6aに、ほぼ等間隔に複数の杭主筋孔8を
穿設し、更にこの底板6の中央に穿設した下部トレミー
口7の周縁に、放射状に切り込んだ複数のスリット9
を、ほぼ等間隔にかつ前記平坦域6aを残して形成し、
更に各スリット9によって生じたスリット片9aを斜上
方に折曲し、このスリット片9aの先端を前記内円筒2
の下縁に固着して形成したことを特徴とする場所打杭の
杭頭処理具。
3. A plurality of gas / liquid drain holes 5 are formed near the outer peripheral edge of the top plate 1 of the outer cylinder 3, and a concrete placing tremie pipe 16 can be freely inserted into the center of the top plate 1. A double cylinder having an upper upper tremie port 4 formed therein, which is engaged with the lower side of the upper tremie port 4 and which has an upper and lower open inner cylinder 2 shorter than the outer cylinder 3 by 2% to 3%. In the cap body A formed by forming a plurality of main pile holes 8 at substantially equal intervals in a flat area 6a near the outer peripheral edge of the bottom plate 6 of the outer cylinder 3, and further in the center of the bottom plate 6. A plurality of slits 9 cut radially are formed on the periphery of the lower tremie opening 7 formed in
Are formed at substantially equal intervals and leave the flat region 6a,
Further, the slit piece 9a generated by each slit 9 is bent obliquely upward, and the tip of this slit piece 9a is fixed to the inner cylinder 2
A pile head treatment tool for cast-in-place piles, which is formed by being fixedly attached to the lower edge of the pile.
【請求項4】 天板1または/或いは底板6を、網体又
はパンチングメタルによって形成したことを特徴とする
請求項1、2または3記載の場所打杭の杭頭処理具。
4. The pile head treating tool for cast-in-place piles according to claim 1, 2 or 3, wherein the top plate 1 and / or the bottom plate 6 is formed of a mesh or punching metal.
【請求項5】 鉄筋篭14にキャップ本体Aを冠着する
と共に、キャップ本体Aと鉄筋篭14とを着脱自在なチ
ェーンやワイヤーや紐等の索条23で縛って固着し、こ
の鉄筋篭14を掘削孔17に建て込むようにしたことを
特徴とする請求項1〜4の何れか一に記載の場所打杭の
杭頭処理具を使用する杭頭処理工法。
5. The rebar cage 14 is capped with the cap body A, and the cap body A and the rebar cage 14 are bound and fixed by a cord 23 such as a detachable chain, wire or cord. The pile head treatment method using the pile head treatment tool for cast-in-place pile according to any one of claims 1 to 4, wherein the pile head treatment tool is built in the excavation hole 17.
【請求項6】 鉄筋篭14にキャップ本体Aをスタット
溶接にて冠挿固着して掘削孔17に建て込み、次いで前
記キャップ本体Aの内円筒2を介してトレミー管16を
掘削孔17に建て込み、前記掘削孔17の底部より前記
内円筒2の天面に至るまで、連続的にコンクリート打設
を行った後、直ちにケリーバー19に取り付けた掘削バ
ケット18を回転させることにより、内円筒に充填され
たスライム混りコンクリートを除去することを特徴とす
る請求項1〜4の何れか一に記載の場所打杭の杭頭処理
具を使用する杭頭処理工法。
6. The cap body A is staked and fixed to the rebar cage 14 by stat welding and built in the drill hole 17, and then the tremie pipe 16 is built in the drill hole 17 through the inner cylinder 2 of the cap body A. After performing continuous concrete pouring from the bottom of the excavation hole 17 to the top surface of the inner cylinder 2, the inner cylinder is immediately filled by rotating the excavation bucket 18 attached to the kelly bar 19. The pile head treatment method using the pile head treatment tool for cast-in-place pile according to any one of claims 1 to 4, wherein the removed slime-mixed concrete is removed.
JP28364595A 1994-12-05 1995-10-31 Pile head processing tool and pile head processing construction method for cast-in-place pile Pending JPH08209686A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP28364595A JPH08209686A (en) 1994-12-05 1995-10-31 Pile head processing tool and pile head processing construction method for cast-in-place pile
US08/836,696 US5961253A (en) 1994-12-05 1995-11-27 Pile head dresser, pile head dressing method, and, placement of cast-in-place concrete piles
DE69528377T DE69528377D1 (en) 1994-12-05 1995-11-27 Pile head treatment tool for a locally formed pile, and pile head treatment method
KR1019970702757A KR100428018B1 (en) 1994-12-05 1995-11-27 File head treatment of concrete mortar, file head treatment method, and mortar concrete mortar method
EP95938611A EP0796948B1 (en) 1994-12-05 1995-11-27 Pile head treating tool for cast-in-place and pile head treating method
CN95196621A CN1077942C (en) 1994-12-05 1995-11-27 Pile head treating tool for cast-in-place pile, pile head treating method, and cast-in-place piling method
PCT/JP1995/002438 WO1996018001A1 (en) 1994-12-05 1995-11-27 Pile head treating tool for cast-in-place pile, pile head treating method, and cast-in-place piling method

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP30058394 1994-12-05
JP6-300583 1994-12-05
JP28364595A JPH08209686A (en) 1994-12-05 1995-10-31 Pile head processing tool and pile head processing construction method for cast-in-place pile

Publications (1)

Publication Number Publication Date
JPH08209686A true JPH08209686A (en) 1996-08-13

Family

ID=26555124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28364595A Pending JPH08209686A (en) 1994-12-05 1995-10-31 Pile head processing tool and pile head processing construction method for cast-in-place pile

Country Status (1)

Country Link
JP (1) JPH08209686A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006183339A (en) * 2004-12-28 2006-07-13 Kumagai Gumi Co Ltd Pile head finishing cap for cast-in-place pile
JP2013028950A (en) * 2011-07-28 2013-02-07 Taisei Corp Construction method of cast-in-place concrete pile and concrete collection apparatus
JP2014214443A (en) * 2013-04-23 2014-11-17 株式会社サンエイ Slime removal bucket and pile head treatment method using the same
JP2018165431A (en) * 2017-03-28 2018-10-25 大成建設株式会社 Construction method of cast-in-place pile and foundation
CN111733817A (en) * 2020-05-18 2020-10-02 四川省公路规划勘察设计研究院有限公司 Steel pipe concrete pile structure and construction method thereof
CN113684785A (en) * 2021-08-23 2021-11-23 中交(天津)疏浚工程有限公司 Construction process of pile foundation wharf
CN115030170A (en) * 2022-06-06 2022-09-09 中铁十二局集团有限公司 Bored pile collapsed hole backfilling construction method and backfilling auxiliary device
CN115142416A (en) * 2022-08-01 2022-10-04 湖北工业大学工程技术学院 Pile head breaking device for cast-in-place pile

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006183339A (en) * 2004-12-28 2006-07-13 Kumagai Gumi Co Ltd Pile head finishing cap for cast-in-place pile
JP2013028950A (en) * 2011-07-28 2013-02-07 Taisei Corp Construction method of cast-in-place concrete pile and concrete collection apparatus
JP2014214443A (en) * 2013-04-23 2014-11-17 株式会社サンエイ Slime removal bucket and pile head treatment method using the same
JP2018165431A (en) * 2017-03-28 2018-10-25 大成建設株式会社 Construction method of cast-in-place pile and foundation
CN111733817A (en) * 2020-05-18 2020-10-02 四川省公路规划勘察设计研究院有限公司 Steel pipe concrete pile structure and construction method thereof
CN111733817B (en) * 2020-05-18 2021-11-09 四川省公路规划勘察设计研究院有限公司 Steel pipe concrete pile structure and construction method thereof
CN113684785A (en) * 2021-08-23 2021-11-23 中交(天津)疏浚工程有限公司 Construction process of pile foundation wharf
CN113684785B (en) * 2021-08-23 2023-06-16 中交(天津)疏浚工程有限公司 Construction process of pile foundation wharf
CN115030170A (en) * 2022-06-06 2022-09-09 中铁十二局集团有限公司 Bored pile collapsed hole backfilling construction method and backfilling auxiliary device
CN115030170B (en) * 2022-06-06 2023-12-12 中铁十二局集团有限公司 Hole collapse backfill construction method and backfill auxiliary device for bored pile
CN115142416A (en) * 2022-08-01 2022-10-04 湖北工业大学工程技术学院 Pile head breaking device for cast-in-place pile

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