JP3855189B2 - Filler injection device and filler injection method - Google Patents

Filler injection device and filler injection method Download PDF

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JP3855189B2
JP3855189B2 JP2001328361A JP2001328361A JP3855189B2 JP 3855189 B2 JP3855189 B2 JP 3855189B2 JP 2001328361 A JP2001328361 A JP 2001328361A JP 2001328361 A JP2001328361 A JP 2001328361A JP 3855189 B2 JP3855189 B2 JP 3855189B2
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filler
stress relaxation
pile
pile head
head stress
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JP2003129469A (en
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孝 青木
英之 真野
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Shimizu Corp
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Shimizu Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、経済的で作業効率が良く、杭頭応力緩和装置の底面に密実に充填材を充填することの可能な充填材注入装置、及び充填材注入方法に関する。
【０００２】
【従来の技術】
図５に示すように、場所打ちコンクリート杭や中空部に中詰めコンクリートを打設した既製杭等よりなる杭２の上面に、杭頭応力緩和装置１を設置する場合には、前記杭２の上面にアンカーボルト３を取り付けて、該杭２の上面と前記杭頭応力緩和装置１の底面との間に空隙部４を設けるようにして、杭頭応力緩和装置１を前記アンカーボルト３に固定する。この後、該杭頭応力緩和装置１の外側に離間して型枠１４を設けて、該型枠１４と前記杭頭応力緩和装置１との間から充填材としてモルタル１６を注入し、杭２の上面と前記杭頭応力緩和装置１の底面との空隙部４を充填する（図５（ａ）（ｂ）参照）。
【０００３】
【発明が解決しようとする課題】
しかし、この方法では、モルタル１６には粘性があるため、前記空隙部４の高さｔより、空隙部４の奥行きＬが長いと、図５（ｂ）に示すように、注入されたモルタル５が奥行きＬに達することなく管挿入口１５側からあふれてしまうことが多い。さらに、追加して精度良く注入することが困難で、図５（ｃ）（ｄ）に示すように、奥の方や前記アンカーボルト３の背面近傍側等、部分的に気泡を残してしまうこととなり、不十分な充填となりやすい。また、気泡等を残さないことを目的にバイブレーターを使用すると、モルタル１６が分離してしまい所定強度を得ることができない。また、モルタル１６は手作業の流し込みにより注入されるため、作業効率が悪く、時間を要する。
【０００４】
さらに、上述するような方法では、前記空隙部４にモルタル１６を密実に充填されたかを確認することが困難である。
【０００５】
上記事情に鑑み、本発明は、経済的で作業効率が良く、杭頭応力緩和装置の底面に密実に充填材を充填することの可能な充填材注入装置、及び充填材注入方法を提供することを目的としている。
【０００６】
【課題を解決するための手段】
請求項１記載の充填材注入装置は、杭頭応力緩和装置の底面と、場所打ちコンクリート杭もしくは中詰コンクリート杭の上面との空隙部を充填材により充填する充填材注入装置において、充填材を注入するための管挿入口、及び複数の空気抜孔を有するとともに、前記杭頭応力緩和装置より高く、内周面が杭頭応力緩和装置の外周面と接するように場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に設けられた湾曲自在の型枠と、該型枠の前記管挿入口に差し込まれ、前記杭頭応力緩和装置下に充填材を注入する充填材注入管と、該充填材注入管に充填材を圧送する充填材圧送手段とにより構成されており、前記空気抜孔が、湾曲自在の前記型枠と前記杭頭応力緩和装置の外周面との間に管又は突起物を挟み込ませることで形成されていることを特徴としている。
【０００７】
請求項２記載の充填材注入装置は、前記型枠の空気抜孔が、前記場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に前記杭頭応力緩和装置を固定するために取り付けられたアンカーボルトの、背面近傍となる位置に設けられていることを特徴としている。
【０００８】
請求項３記載の充填材注入方法は、場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に、空隙部を設けて杭頭応力緩和装置をアンカーボルトを介して固定した後、該杭頭応力緩和装置の外周に管又は突起物を配置し、該管又は突起物を側部から覆うように湾曲自在の型枠を配置して該型枠を前記杭頭応力緩和装置の外周に接するように取り付けるとともに、該型枠の管挿入口に充填材注入管を取り付け、前記型枠内に充填された充填材が、湾曲自在の前記型枠と前記杭頭応力緩和装置の外周面との間に前記管又は突起物が挟み込まれることで形成された空気抜孔から湧き出る状態まで、充填材圧送手段の圧送により充填材を注入することを特徴としている。
【０００９】
【発明の実施の形態】
以下、本発明に係る充填材注入装置６、及び充填材注入方法について、図１から図４を用いて説明する。本発明は、杭頭応力装置１の下面と杭２の上面との間に設けた空隙部４に充填材を充填し、建物荷重を前記杭頭応力装置１を介して確実に杭２に伝達させるため、空隙部４内に気泡等を生じさせないような充填材注入装置６及び充填材注入方法を示すものである。
【００１０】
図１に示すように、該杭頭部応力装置１は、場所打ちコンクリート杭、もしくは中空部に中詰コンクリートを打設した鋼管杭等による杭２の上面に取り付けられるものである。該杭頭部応力装置１の取付は、図１（ａ）に示すように、前記杭２の上面にあらかじめアンカーボルト３の一方の端部を複数埋め込んでおき、他方の端部に固着されることによって取り付けられるものである。このとき、前記杭頭部応力装置１の下面と前記杭２の上面との間には、レベル調整用ナット等により所定の空隙部４を設けておく。
【００１１】
該空隙部４を充填する充填材５を注入する前記充填材注入装置６は、型枠７と、充填材注入管８と、充填材圧送手段９とより構成される。前記型枠７は、杭頭応力緩和装置１の水平高さよりも部材高が高く、自立性はあるが一定の力を加えることで自在にわん曲させることが可能なゴム等による柔らかい部材よりなるもので、図１（ｂ）に示すように、杭頭応力緩和装置１の外周面との間に隙間なく接するように取り付けられる。
【００１２】
これら、前記型枠７と杭頭応力緩和装置１との間には、複数の空気抜孔１１が設けられている。該空気抜孔１１は、前記型枠７の内周面側に切り込みを設けたもので、その位置は前記杭頭部応力装置１が取り付けられている前記アンカーボルト３の背面近傍となるように配置されている。さらに、必要に応じて、隣り合う前記アンカーボルト３どうしの中間部近傍となる位置にも、空気抜孔１１を設けても良い。
【００１３】
なお、該空気抜孔１１を設ける方法は、このような型枠７自身に切り込みを設ける方法だけでなく、空気抜孔として機能するものであれば、どのような構成でもよい。事例として、以下に３つの方法を示す。
１つ目は、図２（ａ）（ｂ）に示すように、前記杭頭応力緩和装置１の外周部で、前記アンカーボルト３の背面近傍となる位置、さらには必要に応じて、隣り合う前記アンカーボルト３どうしの中間部近傍となる位置に空気抜孔用管１２を配置し、これらを前記杭頭応力緩和装置１の外周面と前記型枠７との間に挟み込むように、側部からこれらを覆うようにして型枠７を配置し、できる限り前記型枠７が前記杭頭応力緩和装置１の外周面に密着するように取り付けるものである。
【００１４】
２つ目は、図２（ｃ）に示すように、前記杭頭応力緩和装置１の外周面で、前記アンカーボルト３の背面近傍となる位置、さらには必要に応じて、隣り合う前記アンカーボルト３どうしの中間部近傍となる位置に、各々突起物１３を設けた上で、側部からこれらを覆うようにして型枠７を配置し、できる限り前記型枠７が前記杭頭応力緩和装置１の外周面に密着するように取り付けて、前記突起物１３と、型枠７との間に生じた隙間を空気抜孔１１として用いるものである。
【００１５】
なお、本実施の形態では、前記突起物１３として、木片を前記杭頭応力緩和装置１に固着させているが、突起物１３の材料はこれにこだわるものではなく、杭頭応力緩和装置１に固着可能で、これらを覆うように取り付けられる型枠７との間に隙間を設けることが可能な形状のものであれば、何れのものでも良い。
【００１６】
３つ目は、図３（ａ）（ｂ）に示すように、前記杭頭応力緩和装置１の外周面と、これを覆うように設ける型枠７の内周面との間全体にわずかな隙間を設け、これを空気抜孔１１としたものである。該空気抜孔１１における前記杭頭応力緩和装置１の外周面と型枠７の内周面との間隔は、杭頭応力緩和装置１と杭２との間の空隙部４に充填される充填材５が空気抜孔１１から容易にあふれ出ない程度を目安とする。
【００１７】
このようないずれかの方法により空気抜孔１１を設けた該型枠７の一部分には、前記空隙部４に充填材５を注入する充填材注入管８が差し入れられて前記充填材５の管挿入口１０として機能することを目的に、杭頭応力緩和装置１の外周面と型枠７との間に開口部が設けられている。該管挿入口１０は前記充填材注入管８を差し入れるに十分な程度の大きさに留めておき、できる限り該充填材注入管８と、型枠７と、杭頭応力緩和装置６との間に無駄な隙間がないように設ける。
【００１８】
前記充填材注入管８の先端は、図１〜図３に示すように、該管挿入口１０から前記空隙部４の内部に差し込まれ、該空隙部４の中央部より奥方に達するように挿入される。そして、図４に示すように、該充填材注入管８を介して前記充填材圧送手段９による圧送により、前記充填材５が空隙部４の内部に充填されていく。ここで、本実施の形態では、前記充填材圧送手段９としてポンプを用いているが、充填材５を確実に圧送できるものであれば、これにこだわるものではない。
【００１９】
なお、該充填材５は、粘性が低くなるように配合された無収縮モルタル５を用いているが、これにこだわるものではなく、粘性が低く、硬化後には杭頭応力装置１の下面と杭２の上面との間に設けた空隙部４に充填されて、建物荷重を前記杭頭応力装置１を介して確実に杭２に伝達させることのできるものであれば、何れを用いても良い。
【００２０】
上述するような構成による前記充填材注入装置６を用いた杭頭応力装置１の下面と杭２の上面との間に設けた空隙部４への充填材注入方法を以下に示す。
【００２１】
まず、前記型枠７における内周面側の所定の位置に後に空気抜孔１１となる切り込みを設けておく。杭２の上面に空隙部４を設けて取り付けられた杭頭応力装置１の外周面に型枠７の内周面が接するように型枠７を配置する。このとき、前記空気抜孔１１が、前記アンカーボルト３の背面近傍に位置するように型枠７の設置位置を調整する。
【００２２】
また、前記型枠７と杭頭応力装置１との間の一部に、前記充填材注入管８を差し入れる管挿入口１０となる開口部を設けた上で、型枠７を前記杭２の上面に固定すること、及び型枠７の下端部から充填材が漏れ出す現象を防止することを目的に、型枠７の下端部の外周面側をモルタル１６等によりシールする。
【００２３】
このような型枠７の設置が終了した後、前記管挿入口１０より、充填材注入管８を差し入れ、その先端が前記空隙部４の充分奥方まで位置したのを確認した後、前記充填材圧送手段９の圧送により無収縮モルタル５の注入を開始する。該無収縮モルタル５の注入は、型枠７に設けたすべての空気抜孔１１より無収縮モルタル５が湧き出ている状態を確認した後に終了する。
【００２４】
上述する充填材注入方法によれば、無収縮モルタル５が前記空隙部４に気泡を生じることなく、密実かつ確実に充填されるため、前記杭頭応力装置１から杭２への荷重伝達を確実なものとすることが可能となる。
【００２５】
また、すべての空気抜孔１１から、無収縮モルタル５が湧き出す状態を確認した後に無収縮モルタル５の注入を終了することから、品質の管理を容易に行うことが可能となる。
さらに、作業手順が容易で、効率性が良く、工期短縮やコスト削減に大きく寄与することが可能となる。
【００２６】
前記充填材注入装置６によれば、充填材圧送手段９を用いて無収縮モルタル５を圧送するため、従来の手作業によるモルタルの流し込みに比べて作業が迅速となり、工期を短縮することが可能となる。
【００２７】
前記充填材注入装置６によれば、アンカーボルト３の背面近傍側に空気抜孔１１を設けたため、アンカーボルトの下流側に残りやすい気泡を排除することが可能となる。
【００２８】
【発明の効果】
請求項１記載の充填材注入装置は、杭頭応力緩和装置の底面と、場所打ちコンクリート杭もしくは中詰コンクリート杭の上面との空隙部を充填材により充填する充填材注入装置において、充填材を注入するための管挿入口、及び複数の空気抜孔を有するとともに、前記杭頭応力緩和装置より高く、内周面が杭頭応力緩和装置の外周面と接するように場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に設けられた湾曲自在の型枠と、該型枠の前記管挿入口に差し込まれ、前記杭頭応力緩和装置下に充填材を注入する充填材注入管と、該充填材注入管に充填材を圧送する充填材圧送手段とにより構成されており、前記空気抜孔が、湾曲自在の前記型枠と前記杭頭応力緩和装置の外周面との間に管又は突起物を挟み込ませることで形成されていることから、充填材圧送手段を用いて充填材を圧送するため、従来の手作業による充填材の流し込みに比べて作業が迅速となり、工期を短縮することが可能となる。
【００２９】
請求項２記載の充填材注入装置は、前記型枠の空気抜孔が、前記場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に前記杭頭応力緩和装置を固定するために取り付けられたアンカーボルトの、背面近傍となる位置に設けられていることから、アンカーボルトの下流側に残りやすい気泡を排除することが可能となる。
【００３０】
請求項３記載の充填材注入方法は、場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に、空隙部を設けて杭頭応力緩和装置をアンカーボルトを介して固定した後、該杭頭応力緩和装置の外周に管又は突起物を配置し、該管又は突起物を側部から覆うように湾曲自在の型枠を配置して該型枠を前記杭頭応力緩和装置の外周に接するように取り付けるとともに、該型枠の管挿入口に充填材注入管を取り付け、前記型枠内に充填された充填材が、湾曲自在の前記型枠と前記杭頭応力緩和装置の外周面との間に前記管又は突起物が挟み込まれることで形成された空気抜孔から湧き出る状態まで、充填材圧送手段の圧送により充填材を注入することから、充填材が前記空隙部に気泡を生じることなく、密実かつ確実に充填されるため、前記杭頭応力装置から杭への荷重伝達を確実なものとすることが可能となる。また、品質管理を容易に行うことが可能となる。
さらに、作業手順が容易で、効率性が良く、工期短縮やコスト削減に大きく寄与することが可能となる。
【図面の簡単な説明】
【図１】 本発明に係る充填材注入装置を示す図である。
【図２】 本発明に係る充填材注入装置の型枠の詳細を示す図である。
【図３】 本発明に係る充填材注入装置の他の事例を示す図である。
【図４】 本発明に係る充填材注入装置の全体概念を示す図である。
【図５】 従来の充填材注入装置を示す図である。
【符号の説明】
１ 杭頭応力装置
２ 杭
３ アンカーボルト
４ 空隙部
５ 無収縮モルタル
６ 充填材注入装置
７ 型枠
８ 充填材注入管
９ 充填材圧送手段
１０ 管挿入口
１１ 空気抜孔
１２ 空気抜孔用管
１３ 突起物
１４ 型枠
１５ 管挿入口
１６ モルタル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filler injecting apparatus and a filler injecting method that are economical, have good work efficiency, and can be filled with a filler densely on the bottom surface of a pile head stress relaxation apparatus.
[0002]
[Prior art]
As shown in FIG. 5, when the pile head stress relaxation device 1 is installed on the upper surface of a pile 2 made of cast-in-place concrete piles or ready-made piles in which hollow-filled concrete is cast, The anchor bolt 3 is attached to the upper surface, and the gap head 4 is provided between the upper surface of the pile 2 and the bottom surface of the pile head stress relaxation device 1 to fix the pile head stress relaxation device 1 to the anchor bolt 3. To do. Thereafter, a mold frame 14 is provided apart from the outside of the pile head stress relaxation device 1, and mortar 16 is injected as a filler from between the mold frame 14 and the pile head stress relaxation device 1. The gap 4 between the upper surface of the pile head and the bottom surface of the pile head stress relaxation device 1 is filled (see FIGS. 5A and 5B).
[0003]
[Problems to be solved by the invention]
However, in this method, since the mortar 16 is viscous, if the depth L of the gap portion 4 is longer than the height t of the gap portion 4, as shown in FIG. Often overflow from the tube insertion opening 15 side without reaching the depth L. In addition, it is difficult to inject with high accuracy, and as shown in FIGS. 5C and 5D, air bubbles may be partially left behind, such as in the back or near the back side of the anchor bolt 3. It tends to be insufficient filling. Further, when a vibrator is used for the purpose of leaving no bubbles or the like, the mortar 16 is separated and a predetermined strength cannot be obtained. Further, since the mortar 16 is injected by pouring manually, the work efficiency is poor and time is required.
[0004]
Furthermore, in the method as described above, it is difficult to confirm whether the gap 4 is filled with the mortar 16 densely.
[0005]
In view of the above circumstances, the present invention is to provide a filling material injecting apparatus and a filling material injecting method that are economical, have good working efficiency, and can be filled with a filling material densely on the bottom surface of a pile head stress relaxation device. It is an object.
[0006]
[Means for Solving the Problems]
The filler injection device according to claim 1 is a filler injection device for filling a gap between a bottom surface of a pile head stress relaxation device and a top surface of a cast-in-place concrete pile or a filling concrete pile with a filler. A cast-in-place concrete pile or filled concrete so that it has a pipe insertion port for injection and a plurality of air vent holes, is higher than the pile head stress relaxation device, and has an inner peripheral surface in contact with the outer peripheral surface of the pile head stress relaxation device A bendable mold provided on the upper surface of the pile, a filler injection pipe that is inserted into the pipe insertion port of the mold and injects a filler under the pile head stress relaxation device, and the filler injection pipe And a filler pumping means for pumping the filler into the pipe, and the air vent hole sandwiches a pipe or a projection between the bendable mold and the outer peripheral surface of the pile head stress relaxation device. Formed with It is characterized in that.
[0007]
The filler injection device according to claim 2, wherein the air vent of the formwork is an anchor bolt attached to fix the pile head stress relaxation device on the upper surface of the cast-in-place concrete pile or the filling concrete pile. It is characterized by being provided at a position near the back surface.
[0008]
The filling material injecting method according to claim 3, wherein a space is provided on the upper surface of the cast-in-place concrete pile or the filled concrete pile and the pile head stress relaxation device is fixed via an anchor bolt, and then the pile head stress relaxation device A pipe or a protrusion is arranged on the outer periphery of the pipe, a bendable mold is arranged so as to cover the pipe or the protrusion from the side, and the mold is attached so as to be in contact with the outer circumference of the pile head stress relaxation device. The filler injection pipe is attached to the tube insertion port of the mold, and the filler filled in the mold is placed between the bendable mold and the outer peripheral surface of the pile head stress relaxation device. Or it is characterized by injecting the filler by pumping the filler pumping means to the state of springing out from the air vent formed by the protrusions being sandwiched .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the filler injection device 6 and the filler injection method according to the present invention will be described with reference to FIGS. The present invention fills the gap 4 provided between the lower surface of the pile head stress device 1 and the upper surface of the pile 2 with a filler, and reliably transmits the building load to the pile 2 via the pile head stress device 1. Therefore, a filler injection device 6 and a filler injection method that do not generate bubbles or the like in the gap 4 are shown.
[0010]
As shown in FIG. 1, the pile head stress device 1 is attached to the upper surface of a pile 2 such as a cast-in-place concrete pile or a steel pipe pile in which filling concrete is placed in a hollow portion. As shown in FIG. 1A, the pile head stress device 1 is attached by embedding a plurality of one end portions of the anchor bolt 3 in advance on the upper surface of the pile 2 and fixing the pile head stress device to the other end portion. It is attached by. At this time, a predetermined gap 4 is provided between the lower surface of the pile head stress device 1 and the upper surface of the pile 2 by a level adjusting nut or the like.
[0011]
The filler injection device 6 for injecting the filler 5 that fills the gap 4 includes a mold 7, a filler injection pipe 8, and a filler pressure feeding means 9. The mold 7 is made of a soft member made of rubber or the like that has a member height higher than the horizontal height of the pile head stress relaxation device 1 and is self-supporting but can be bent freely by applying a certain force. Therefore, as shown in FIG. 1 (b), it is attached so as to be in contact with the outer peripheral surface of the pile head stress relaxation device 1 without a gap.
[0012]
A plurality of air vent holes 11 are provided between the mold 7 and the pile head stress relaxation device 1. The air vent hole 11 is provided with a notch on the inner peripheral surface side of the mold 7, and the position thereof is arranged in the vicinity of the back surface of the anchor bolt 3 to which the pile head stress device 1 is attached. Has been. Furthermore, you may provide the air vent hole 11 also in the position used as the vicinity of the intermediate part of the adjacent anchor bolts 3 as needed.
[0013]
The method for providing the air vent hole 11 is not limited to such a method for providing a cut in the mold 7 itself, but may be any configuration as long as it functions as an air vent hole. As an example, three methods are shown below.
First, as shown in FIGS. 2 (a) and 2 (b), the outer periphery of the pile head stress relaxation device 1 is adjacent to the position near the back surface of the anchor bolt 3, and if necessary. An air vent hole pipe 12 is arranged at a position in the vicinity of the intermediate portion between the anchor bolts 3 and from the side so as to be sandwiched between the outer peripheral surface of the pile head stress relaxation device 1 and the mold 7. The mold 7 is arranged so as to cover them, and is attached so that the mold 7 is in close contact with the outer peripheral surface of the pile head stress relaxation device 1 as much as possible.
[0014]
2nd, as shown in FIG.2 (c), it is the outer peripheral surface of the said pile head stress relaxation apparatus 1, the position used as the back surface vicinity of the said anchor bolt 3, and also the said adjacent anchor bolt as needed. The projections 13 are provided at positions near the middle portion between the three, and the mold frame 7 is arranged so as to cover these from the side, and the mold frame 7 is as far as possible to the pile head stress relaxation device. It attaches so that it may closely_contact | adhere to the outer peripheral surface of 1, and the clearance gap produced between the said protrusion 13 and the formwork 7 is used as the air vent hole 11. FIG.
[0015]
In the present embodiment, a piece of wood is fixed to the pile head stress relaxation device 1 as the projection 13, but the material of the projection 13 is not particular to this, and the pile head stress relaxation device 1 Any shape may be used as long as it can be fixed and can be provided with a gap with the mold 7 attached so as to cover them.
[0016]
3rd, as shown to Fig.3 (a) (b), it is a little to the whole between the outer peripheral surface of the said pile head stress relaxation apparatus 1, and the inner peripheral surface of the formwork 7 provided so that this may be covered. A clearance is provided, which is used as the air vent hole 11. The space between the outer peripheral surface of the pile head stress relaxation device 1 and the inner peripheral surface of the mold 7 in the air vent hole 11 is a filler that fills the gap portion 4 between the pile head stress relaxation device 1 and the pile 2. The degree to which 5 does not easily overflow from the air vent hole 11 is taken as a guide.
[0017]
A filler injection pipe 8 for injecting the filler 5 into the gap 4 is inserted into a part of the mold 7 in which the air vent hole 11 is provided by any of these methods, and the pipe of the filler 5 is inserted. An opening is provided between the outer peripheral surface of the pile head stress relaxation device 1 and the mold 7 for the purpose of functioning as the mouth 10. The pipe insertion port 10 is kept large enough to insert the filler injection pipe 8, and as much as possible of the filler injection pipe 8, the mold 7, and the pile head stress relaxation device 6. Provide no gaps between them.
[0018]
As shown in FIGS. 1 to 3, the tip of the filler injection tube 8 is inserted into the gap portion 4 from the tube insertion port 10, and is inserted so as to reach the depth from the center portion of the gap portion 4. Is done. Then, as shown in FIG. 4, the filler 5 is filled into the gap portion 4 by the pumping by the filler pumping means 9 through the filler injection tube 8. Here, in the present embodiment, a pump is used as the filler pumping means 9, but this is not particularly limited as long as the filler 5 can be pumped reliably.
[0019]
In addition, although the non-shrink mortar 5 mix | blended so that viscosity may become low is used for this filler 5, it is not particular about this, its viscosity is low and after hardening, the lower surface of the pile head stress apparatus 1 and a pile Any one may be used as long as it is filled in the gap 4 provided between the upper surface of 2 and the building load can be reliably transmitted to the pile 2 via the pile head stress device 1. .
[0020]
A method for injecting the filler into the gap 4 provided between the lower surface of the pile head stress device 1 using the filler injection device 6 having the above-described configuration and the upper surface of the pile 2 will be described below.
[0021]
First, a notch that will later become the air vent hole 11 is provided at a predetermined position on the inner peripheral surface side of the mold 7. The mold 7 is arranged so that the inner peripheral surface of the mold 7 is in contact with the outer peripheral surface of the pile head stress device 1 attached with the gap 4 provided on the upper surface of the pile 2. At this time, the installation position of the mold 7 is adjusted so that the air vent hole 11 is positioned in the vicinity of the back surface of the anchor bolt 3.
[0022]
Moreover, after providing the opening part used as the pipe insertion port 10 which inserts the said filler injection pipe | tube 8 in a part between the said mold form 7 and the pile head stress apparatus 1, the mold form 7 is made into the said pile 2. The outer peripheral surface side of the lower end of the mold 7 is sealed with a mortar 16 or the like for the purpose of fixing to the upper surface of the mold 7 and preventing the leakage of the filler from the lower end of the mold 7.
[0023]
After the installation of the mold 7 is completed, the filler injection tube 8 is inserted from the tube insertion port 10 and it is confirmed that the tip is located sufficiently deep in the gap portion 4. Injection of the non-shrink mortar 5 is started by the pumping of the pumping means 9. The injection of the non-shrinking mortar 5 is completed after confirming that the non-shrinking mortar 5 is springing out from all the air vent holes 11 provided in the mold 7.
[0024]
According to the filler injection method described above, since the non-shrink mortar 5 is filled densely and surely without generating air bubbles in the gap 4, load transmission from the pile head stress device 1 to the pile 2 can be performed. It becomes possible to make sure.
[0025]
Moreover, since the injection | pouring of the non-shrinking mortar 5 is complete | finished after confirming the state which the non-shrinking mortar 5 springs out from all the air vent holes 11, quality management can be performed easily.
Furthermore, the work procedure is easy, the efficiency is high, and it is possible to greatly contribute to the shortening of the work period and the cost.
[0026]
According to the filler injection device 6, since the non-shrink mortar 5 is pumped using the filler pumping means 9, the operation is quicker than the conventional manual mortar pouring, and the construction period can be shortened. It becomes.
[0027]
According to the filler injection device 6, since the air vent hole 11 is provided in the vicinity of the back surface of the anchor bolt 3, it is possible to exclude bubbles that are likely to remain on the downstream side of the anchor bolt.
[0028]
【The invention's effect】
The filler injection device according to claim 1 is a filler injection device for filling a gap between a bottom surface of a pile head stress relaxation device and a top surface of a cast-in-place concrete pile or a filling concrete pile with a filler. A cast-in-place concrete pile or filled concrete so that it has a pipe insertion port for injection and a plurality of air vent holes, is higher than the pile head stress relaxation device, and has an inner peripheral surface in contact with the outer peripheral surface of the pile head stress relaxation device A bendable mold provided on the upper surface of the pile, a filler injection pipe that is inserted into the pipe insertion port of the mold and injects a filler under the pile head stress relaxation device, and the filler injection pipe And a filler pumping means for pumping the filler into the pipe, and the air vent hole sandwiches a pipe or a projection between the bendable mold and the outer peripheral surface of the pile head stress relaxation device. Formed with Since that, for pumping filler with filler pumping means, operation becomes faster as compared with the casting of the filler according to the conventional manual, it is possible to shorten the construction period.
[0029]
The filler injection device according to claim 2, wherein the air vent of the formwork is an anchor bolt attached to fix the pile head stress relaxation device on the upper surface of the cast-in-place concrete pile or the filling concrete pile. Since it is provided at a position in the vicinity of the back surface, it is possible to eliminate bubbles that are likely to remain on the downstream side of the anchor bolt.
[0030]
The filling material injecting method according to claim 3, wherein a space is provided on the upper surface of the cast-in-place concrete pile or the filled concrete pile and the pile head stress relaxation device is fixed via an anchor bolt, and then the pile head stress relaxation device A pipe or a protrusion is arranged on the outer periphery of the pipe, a bendable mold is arranged so as to cover the pipe or the protrusion from the side, and the mold is attached so as to be in contact with the outer circumference of the pile head stress relaxation device. The filler injection pipe is attached to the tube insertion port of the mold, and the filler filled in the mold is placed between the bendable mold and the outer peripheral surface of the pile head stress relaxation device. Or, since the filler is injected by the pumping of the filler pumping means up to the state where the protrusions are squeezed out from the air vent formed , the filler does not generate bubbles in the gap and is dense and reliable. To be filled with the pile It is possible to made reliable load transfer to the pile from stress device. In addition, quality control can be easily performed.
Furthermore, the work procedure is easy, the efficiency is high, and it is possible to greatly contribute to the shortening of the work period and the cost.
[Brief description of the drawings]
FIG. 1 is a view showing a filler injection device according to the present invention.
FIG. 2 is a diagram showing details of a mold of a filler injection device according to the present invention.
FIG. 3 is a view showing another example of the filler injection device according to the present invention.
FIG. 4 is a diagram showing an overall concept of a filler injection device according to the present invention.
FIG. 5 is a view showing a conventional filler injection device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pile head stress apparatus 2 Pile 3 Anchor bolt 4 Cavity part 5 Non-shrink mortar 6 Filler injection apparatus 7 Formwork 8 Filler injection pipe 9 Filler pumping means 10 Pipe insertion port 11 Air vent hole 12 Air vent hole pipe 13 Projection 14 Formwork 15 Pipe insertion port 16 Mortar

Claims (3)

杭頭応力緩和装置の底面と、場所打ちコンクリート杭もしくは中詰コンクリート杭の上面との空隙部を充填材により充填する充填材注入装置において、
充填材を注入するための管挿入口、及び複数の空気抜孔を有するとともに、前記杭頭応力緩和装置より高く、内周面が杭頭応力緩和装置の外周面と接するように場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に設けられた湾曲自在の型枠と、
該型枠の前記管挿入口に差し込まれ、前記杭頭応力緩和装置下に充填材を注入する充填材注入管と、
該充填材注入管に充填材を圧送する充填材圧送手段とにより構成されており、
前記空気抜孔が、湾曲自在の前記型枠と前記杭頭応力緩和装置の外周面との間に管又は突起物を挟み込ませることで形成されていることを特徴とする充填材注入装置。In the filler injection device that fills the gap between the bottom surface of the pile head stress relaxation device and the top surface of cast-in-place concrete pile or filled concrete pile with filler,
A cast-in-place concrete pile having a pipe insertion port for injecting a filler and a plurality of air vent holes, higher than the pile head stress relaxation device, and having an inner peripheral surface in contact with an outer peripheral surface of the pile head stress relaxation device A bendable formwork provided on the top surface of the filled concrete pile,
A filler injection pipe that is inserted into the pipe insertion port of the mold and injects a filler under the pile head stress relaxation device;
A filler pumping means for pumping the filler into the filler injection pipe ,
The filler injection device , wherein the air vent is formed by sandwiching a tube or a protrusion between the bendable formwork and the outer peripheral surface of the pile head stress relaxation device. 請求項１記載の充填材注入装置において、
前記型枠の空気抜孔が、前記場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に前記杭頭応力緩和装置を固定するために取り付けられたアンカーボルトの、背面近傍となる位置に設けられていることを特徴とする充填材注入装置。The filler injection device according to claim 1, wherein
An air vent hole of the formwork is provided at a position near the back surface of an anchor bolt attached to fix the pile head stress relaxation device on the upper surface of the cast-in-place concrete pile or filled concrete pile. A filler injection device characterized by the above. 請求項１または２記載の充填材注入装置を用いた杭頭応力緩和装置の底面と、場所打ちコンクリート杭もしくは中詰コンクリート杭の表面との空隙部を充填する充填材注入方法であって、
場所打ちコンクリート杭もしくは中詰コンクリート杭の上面に、空隙部を設けて杭頭応力緩和装置をアンカーボルトを介して固定した後、
該杭頭応力緩和装置の外周に管又は突起物を配置し、該管又は突起物を側部から覆うように湾曲自在の型枠を配置して該型枠を前記杭頭応力緩和装置の外周に接するように取り付けるとともに、該型枠の管挿入口に充填材注入管を取り付け、
前記型枠内に充填された充填材が、湾曲自在の前記型枠と前記杭頭応力緩和装置の外周面との間に前記管又は突起物が挟み込まれることで形成された空気抜孔から湧き出る状態まで、充填材圧送手段の圧送により充填材を注入することを特徴とする充填材注入方法。A filler injection method for filling a gap between a bottom surface of a pile head stress relaxation device using the filler injection device according to claim 1 or 2 and a surface of a cast-in-place concrete pile or a filling concrete pile,
After fixing the pile head stress relaxation device via anchor bolts on the upper surface of cast-in-place concrete pile or fill concrete pile,
A pipe or a protrusion is disposed on the outer periphery of the pile head stress relaxation device, a bendable mold is disposed so as to cover the tube or protrusion from the side, and the mold frame is disposed on the outer periphery of the pile head stress relaxation device. Attaching the filler injection pipe to the tube insertion port of the mold,
A state in which the filling material filled in the mold springs out of an air vent formed by the tube or protrusion being sandwiched between the bendable mold and the outer peripheral surface of the pile head stress relaxation device Until this time, the filler injection method is characterized by injecting the filler by the pumping of the filler pumping means.
JP2001328361A 2001-10-25 2001-10-25 Filler injection device and filler injection method Expired - Fee Related JP3855189B2 (en)

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