JP3245669B2 - Repair method of foundation pile - Google Patents
Repair method of foundation pileInfo
- Publication number
- JP3245669B2 JP3245669B2 JP10872795A JP10872795A JP3245669B2 JP 3245669 B2 JP3245669 B2 JP 3245669B2 JP 10872795 A JP10872795 A JP 10872795A JP 10872795 A JP10872795 A JP 10872795A JP 3245669 B2 JP3245669 B2 JP 3245669B2
- Authority
- JP
- Japan
- Prior art keywords
- foundation pile
- viscosity
- repair material
- resin liquid
- particle size
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 15
- 229920005989 resin Polymers 0.000 claims description 28
- 239000011347 resin Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 13
- 239000008267 milk Substances 0.000 claims description 7
- 210000004080 milk Anatomy 0.000 claims description 7
- 235000013336 milk Nutrition 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000011882 ultra-fine particle Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 16
- 239000007924 injection Substances 0.000 description 16
- 238000010276 construction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Working Measures On Existing Buildindgs (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は基礎杭の補修工法、特に
地震によりダメージを受けた基礎杭の補修再生に適用し
て有用な補修工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a foundation pile, and more particularly to a method for repairing and recovering a foundation pile damaged by an earthquake.
【０００２】[0002]
【従来技術とその問題点】最近、阪神地域で発生した大
地震（阪神大震災、１９９５，１，１７未明発生）によ
り多くのコンクリート構造物が大きな被害を受け、その
後の調査により該構造物の基礎杭も少なからずダメージ
を受け、かなりの量の亀裂が発生していることが判明し
ている。2. Description of the Related Art Recently, a large earthquake (Hanshin Great Earthquake, 1995, 1, 17 dawn) occurred in the Hanshin area, and many concrete structures were seriously damaged. The stakes have also suffered considerable damage and have been found to have significant cracks.
【０００３】コンクリート構造物は地上に構築されてい
るので、使用不能のものは解体撤去できるが、基礎杭、
特に場所打ちにより造成されたものは通常大口径でしか
も地中に深く貫入しているので、解体撤去は非常に困難
であり、補修再生して現状に復することが望まれてい
る。[0003] Since concrete structures are constructed on the ground, those that cannot be used can be dismantled and removed.
In particular, those made by cast-in-place are usually large in diameter and penetrate deep into the ground, so it is very difficult to dismantle and remove them.
【０００４】基礎杭に発生していることが予測される亀
裂は、微細なものから比較的大きなものまで、種々様々
な大きさのものが入り混っていることに加え、その多く
は杭の周囲の地盤に連らなっているので、例えば基礎杭
に軸方向に削孔形成した竪孔を通じて亀裂に対し補修材
を注入充填しようとすると、低粘度のものでは比較的大
きな亀裂を透過して地盤内に逸散してしまい、また高粘
度のものでは注入充填抵抗が大きくなるために微細な亀
裂に対しては注入充填することができなくなり、いずれ
の場合も注入充填むらが発生し、補修の信頼性に欠ける
という問題点があった。[0004] The cracks expected to occur in the foundation pile are mixed with various sizes from fine to relatively large, and most of them are piles. Since it is connected to the surrounding ground, for example, when trying to inject and fill a repair material for cracks through a vertical hole formed in the foundation pile in the axial direction, a low viscosity material penetrates a relatively large crack. It will be dissipated into the ground, and if it has a high viscosity, it will not be possible to inject and fill fine cracks due to its high filling and filling resistance. However, there was a problem that the reliability was low.
【０００５】本発明は上記問題点を解消し、亀裂に対
し、微細なものから比較的大きなものに至るまで補修材
をむらなく均一に注入充填することができる、信頼性の
高い補修工法を提供することを目的としてなされたもの
である。The present invention solves the above-mentioned problems and provides a highly reliable repairing method capable of uniformly injecting and filling repair materials from fine to relatively large cracks. It was done for the purpose of doing.
【０００６】[0006]
【問題点を解消するための手段】本発明は、地震等によ
りダメージを受けた基礎杭を補修するに際し、最初に上
記基礎杭の上端から下端近くまで削孔形成した小口径の
竪孔を通じ、基礎杭に発生している亀裂部に対し高粘度
の有機系補修材又は普通粒径の無機系補修材の注入充填
を行い、しかる後に、上記竪孔とは外れた位置で、基礎
杭の上端から下端近くまで削孔形成された他の竪孔を通
じ、基礎杭に発生している亀裂部に対し低粘度の有機系
補修材又は超微粒径の無機系補修材の注入充填を行うこ
とを特徴とする基礎杭の補修工法に係る。[Means for Solving the Problems] In the present invention, when repairing a foundation pile damaged by an earthquake or the like, first, a small-diameter vertical hole formed by drilling from the upper end to the lower end of the foundation pile is provided. Inject and fill high-viscosity organic repair material or medium-size inorganic repair material into the cracks generated in the foundation pile. Through low-viscosity organic repair material or ultra-fine grain inorganic repair material to cracks in the foundation pile through another vertical hole drilled from It relates to the method of repairing foundation piles, which is a special feature.
【０００７】[0007]
【実施例】以下に本発明工法の１実施例を添付図面にも
とづき説明すると次の通りである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the method of the present invention will be described below with reference to the accompanying drawings.
【０００８】図１は本発明工法の補修対象である基礎杭
１の概略説明図であり、図では場所打ち杭が示され、そ
の上端にはフーティング２が一体に造成され、該フーテ
ィング２上にコンクリート構造物３が構築されている。FIG. 1 is a schematic explanatory view of a foundation pile 1 to be repaired by the method of the present invention, in which a cast-in-place pile is shown, and a footing 2 is integrally formed at the upper end thereof. A concrete structure 3 is built on top.
【０００９】場所打ちによる基礎杭１は通常１０００〜
１５００ｍｍ、超大口径のものでは３０００ｍｍ程度の
直径を有し、貫入深さは通常１０〜５０ｍ程度である。[0009] The cast-in-place foundation pile 1 is usually 1000-
It has a diameter of about 1500 mm for a very large diameter of 1500 mm, and the penetration depth is usually about 10 to 50 m.
【００１０】阪神大震災にみられるような大地震が発生
した場合には、基礎杭１は地中に貫入造成されているに
拘わらず、少なからずダメージを受け、図に概略的に示
すように、亀裂として微細なものから比較的大きなもの
まで、種々様々な大きさのものが入り混って発生してい
ることが多い。[0010] When a large earthquake such as the Great Hanshin Earthquake occurs, the foundation pile 1 is considerably damaged regardless of whether it is penetrated into the ground, and as shown schematically in the figure, In many cases, cracks of various sizes, from fine to relatively large, are mixed.
【００１１】図２及び図３に、上記基礎杭１の補修に適
用される本発明工法の一実施例状況が概略的に示され、
図ではフーティング２を残したままで実施した場合が示
されているが、フーティング２が大きなダメージを受
け、補修困難な場合には、フーティングを２を解体撤去
して実施してもよい。FIGS. 2 and 3 schematically show an embodiment of the method of the present invention applied to the repair of the foundation pile 1,
In the figure, the case where the footing 2 is performed while the footing 2 is left is shown. However, when the footing 2 is severely damaged and repair is difficult, the footing 2 may be dismantled and removed.
【００１２】図２（イ）（ロ）（ハ）は、本発明工法に
おける高粘度補修材の注入充填工程の状況を工程順に概
略的に示している。FIGS. 2 (a), 2 (b) and 2 (c) schematically show the state of the step of injecting and filling a high-viscosity repair material in the method of the present invention in the order of steps.
【００１３】図２（イ）は削孔工程の状況を概略的に示
し、削孔は例えばコアボーリング手段４を適用して行わ
れ、フーティング２から基礎杭１の上端を通り、該杭１
の下端近傍に至る深さの竪孔５が削孔形成される。FIG. 2A schematically shows the state of the drilling step. The drilling is performed, for example, by applying a core boring means 4, passes from the footing 2 to the upper end of the foundation pile 1,
A vertical hole 5 having a depth reaching the vicinity of the lower end of the hole is formed.
【００１４】竪孔５は高粘度補修材の注入充填通路とし
て利用するためのものであり、基礎杭強度への悪影響を
考慮し、上記補修材の注入充填に支障がない範囲で、で
きるだけ小口径であることが好ましく、通常は２０〜５
０ｍｍ（直径）程度の範囲から適宜選択決定される。The pit 5 is used as a passage for filling and filling the high-viscosity repair material. In consideration of the adverse effect on the strength of the foundation pile, the diameter of the hole 5 is as small as possible within a range that does not hinder the filling and filling of the repair material. And usually 20 to 5
It is appropriately selected and determined from a range of about 0 mm (diameter).
【００１５】竪孔５を削孔形成した後は、図２に示すよ
うに、該竪孔５の口部に口元部材６が取付け固定され
る。After the pit 5 is formed, a mouth member 6 is attached and fixed to the mouth of the pit 5, as shown in FIG.
【００１６】口元部材６は竪孔５の口部を密閉し、且つ
注入口７を確保するためのものであり、図ではフランジ
部６ａ付の管状のものが示され、フランジ部６ａにおい
てフーティング２と面一となるように、竪孔５の周りに
形成した凹段部２ａにおいて、アンカー金具８の適用に
より取付け固定されている。The mouth member 6 is for sealing the mouth of the vertical hole 5 and securing the injection port 7. In the drawing, a tubular member with a flange 6a is shown, and the footing 6 is provided at the flange 6a. At the concave step portion 2a formed around the vertical hole 5 so as to be flush with 2, the fixing member 8 is attached and fixed by applying an anchor fitting 8.
【００１７】竪孔５の口部に口元部材６を取付け固定し
た後は、図２（ハ）に示すように高粘度補修材例えばエ
ポキシ樹脂系の高粘度樹脂液の注入充填が開始される。
高粘度樹脂液９は例えば密閉容器１０内に適宜補給可能
に容入されており、少なくとも２０００センチポイズ好
ましくは５０００センチポイズ以上、より好ましくは１
００００センチポイズ以上の粘度を持っている。After the mouth member 6 is attached and fixed to the mouth of the vertical hole 5, the injection and filling of a high-viscosity repair material, for example, an epoxy resin-based high-viscosity resin liquid is started as shown in FIG.
The high-viscosity resin liquid 9 is contained, for example, in a closed container 10 so as to be able to be appropriately replenished, and is at least 2,000 centipoise, preferably 5,000 centipoise or more, more preferably 1 centipoise or more.
It has a viscosity of 0000 centipoise or more.
【００１８】密閉容器１０内の気相部１０ａに例えば高
圧ボンベ１１などのような高圧ガス供給源より高圧ガス
（例えば窒素ガス）を供給すると、上記樹脂液９は高圧
ガスによる押圧を受けて該容器１０から注入ホース１２
及びこれに接続する注入口７を順次経て竪孔５内に注入
充填されて行く。When a high-pressure gas (for example, nitrogen gas) is supplied from a high-pressure gas supply source such as a high-pressure cylinder 11 to the gas-phase portion 10a in the closed vessel 10, the resin liquid 9 is pressed by the high-pressure gas and is pressed. Injection hose 12 from container 10
Then, the gas is injected and filled into the vertical hole 5 sequentially through the injection port 7 connected thereto.
【００１９】注入充填圧（元圧）は、地下水圧よりも大
きいことが必要であり、施工条件にもよるが通常は１〜
５ｋｇ／ｃｍ2 の圧力があれば充分である。The injection filling pressure (original pressure) needs to be higher than the groundwater pressure, and although it depends on the construction conditions, it is usually 1 to 1.
A pressure of 5 kg / cm 2 is sufficient.
【００２０】竪孔５内への樹脂液９の注入充填を継続す
ると、樹脂液９は地下水を地盤側に向け押し戻しながら
基礎杭１の亀裂内に注入充填されていく。When the filling and filling of the resin liquid 9 into the pit 5 is continued, the resin liquid 9 is poured and filled into the cracks of the foundation pile 1 while pushing the groundwater back toward the ground.
【００２１】樹脂液９は高粘度であるので、注入充填抵
抗が大きく、注入充填は主として比較的大きな亀裂部に
対し行われ、微細な亀裂部は実質的に未充填のまま残
る。Since the resin liquid 9 has a high viscosity, the injection and filling resistance is large, and injection and filling are mainly performed on relatively large cracks, and fine cracks remain substantially unfilled.
【００２２】高粘度樹脂液９の加圧充填は可使時間の終
了近くまで継続される。加圧充填操作を可使時間終了の
少し手前で終えるようにすれば、密閉容器１０及び注入
ホース１２の洗浄再生が可能となり、之等を再使用でき
る。The pressure filling of the high viscosity resin liquid 9 is continued until near the end of the pot life. If the pressurized filling operation is finished shortly before the end of the pot life, the closed container 10 and the injection hose 12 can be washed and regenerated, and these can be reused.
【００２３】加圧充填を停止した後は、注入口７より注
入ホース１２を取外し、注入口７は適宜の手段を適用し
て密閉し、樹脂液９の養生固化を待つ。After the pressurized filling is stopped, the injection hose 12 is removed from the injection port 7, the injection port 7 is closed by applying an appropriate means, and the resin liquid 9 waits for curing and solidification.
【００２４】高粘度樹脂液９の可使時間は特に制限はな
いが、通常は２〜４時間程度の範囲から施工条件などを
考慮し適宜選択決定される。The pot life of the high-viscosity resin liquid 9 is not particularly limited, but is usually selected as appropriate from the range of about 2 to 4 hours in consideration of construction conditions and the like.
【００２５】高粘度樹脂液の加圧充填を終えた後は、図
３に示すように低粘度樹脂液の加圧充填が開始される。
この加圧充填は上記竪孔５と平行に削孔された他の竪孔
１３を通じ、先と同様の手段を適用して実施される。図
３において、１４は口元部材、１５は注入口、１６は低
粘度樹脂液、１７は密閉容器、１８は高圧ボンペ、１９
は注入ホースをそれぞれ示している。After the completion of the pressurizing and filling of the high-viscosity resin liquid, the pressurizing and filling of the low-viscosity resin liquid is started as shown in FIG.
This pressure filling is performed by applying the same means as above through another vertical hole 13 drilled in parallel with the vertical hole 5. In FIG. 3, 14 is a mouth member, 15 is an inlet, 16 is a low-viscosity resin liquid, 17 is a closed container, 18 is a high-pressure bottle, 19
Indicates injection hoses, respectively.
【００２６】低粘度樹脂液の加圧充填は、先の高粘度樹
脂液の加圧充填時に樹脂液が殆んどまたは充分に注入充
填されなかった亀裂その他隙間を対象として実施され
る。The filling of the low-viscosity resin liquid under pressure is carried out for cracks and other gaps in which the resin liquid was hardly or sufficiently injected and filled at the time of the high-viscosity resin liquid under pressure.
【００２７】低粘度樹脂液は浸透性がよく極く小さな隙
間内でもスムーズに浸透して行くので、高粘度樹脂液が
殆んど充填されていない微細な亀裂その他未充填部とし
て残っている全ての微細空隙が低粘度樹脂液により注入
充填される。Since the low-viscosity resin liquid has good permeability and penetrates smoothly even in a very small gap, fine cracks that are hardly filled with the high-viscosity resin liquid and all remaining as unfilled parts Are filled with a low-viscosity resin liquid.
【００２８】低粘度樹脂液の加圧充填時には、未充填部
として微細な亀裂圧の他微細な空隙が残っているにすぎ
ないので、低粘度であるに拘わらず地盤内への逸散が少
なくなり、樹脂液の使用ロスを低減できる。When the low-viscosity resin liquid is filled under pressure, only small cracks remain in addition to a fine crack pressure as an unfilled portion, so that there is little escaping into the ground irrespective of the low viscosity. Thus, the use loss of the resin liquid can be reduced.
【００２９】低粘度樹脂液の加圧充填操作は、密閉容器
１７及び注入ホース１９の洗浄再生を可能とするため
に、可使時間の終了手前で終えることが好ましい。The pressure filling operation of the low-viscosity resin liquid is preferably completed shortly before the end of the pot life so that the closed container 17 and the injection hose 19 can be washed and regenerated.
【００３０】低粘度樹脂液の可使時間は特に制限はない
が、通常は施工条件などを考慮し、２〜４時間程度の範
囲から適宜選択される。また粘度は２０００センチポイ
ズ未満、好ましくは１００〜１５００センチポイズより
好ましくは５００〜１０００センチポイズ程度の範囲か
ら選択される。The pot life of the low-viscosity resin solution is not particularly limited, but is usually selected as appropriate from a range of about 2 to 4 hours in consideration of construction conditions and the like. The viscosity is selected from the range of less than 2000 centipoise, preferably about 100 to 1500 centipoise, more preferably about 500 to 1000 centipoise.
【００３１】加圧充填圧力（元圧）は地下水圧よりも大
きいことが必要であり、施工条件にもよるが、１〜５ｋ
ｇ／ｃｍ2 程度あれば充分である。The pressurized filling pressure (original pressure) needs to be higher than the groundwater pressure, and depends on the construction conditions.
About g / cm 2 is sufficient.
【００３２】補修材としては、実施例において述べたエ
ポキシ樹脂系その他、コンクリートの亀裂補修に用いら
れている公知の各種の補修材例えばセメントミルクを用
い得る。As the repairing material, various known repairing materials used for repairing cracks in concrete, for example, cement milk, other than the epoxy resin-based materials described in the embodiments can be used.
【００３３】セメントミルクの場合、低粘度樹脂液に代
え超微粒径のセメントミルクが用いられ、平均粒径は２
〜８μｍ、好ましくは４〜５μｍ程度である。平均粒径
４〜５μｍの場合、０．５〜１０μｍ程度の範囲の粒径
の粒子を含んでいる。In the case of cement milk, ultra-fine particle size cement milk is used in place of the low viscosity resin liquid, and the average particle size is 2%.
８8 μm, preferably about 4-5 μm. In the case of an average particle diameter of 4 to 5 μm, particles having a particle diameter in the range of about 0.5 to 10 μm are included.
【００３４】また高粘度樹脂液に代え普通粒径、例えば
普通ポルトランドセメントミルクが用いられ、平均粒径
は１０〜２０μｍ、好ましくは１６〜１８μｍ程度であ
る。平均粒径１６〜１８μｍの場合、３〜１００μｍ程
度の範囲の粒径の粒子を含んでいる。A normal particle size, for example, normal Portland cement milk is used in place of the high viscosity resin liquid, and the average particle size is 10 to 20 μm, preferably about 16 to 18 μm. When the average particle diameter is 16 to 18 μm, particles having a particle diameter in the range of about 3 to 100 μm are included.
【００３５】[0035]
【発明の効果】本発明工法においては、高粘度補修材の
注入充填後に、別の個所から低粘度補修材を注入充填す
るようにしたので、亀裂に対し微細なものから比較的大
きなものまでむらなく均一に補修材を注入充填すること
が可能になると共に、補修材の使用ロスを低減でき、基
礎杭の補修再生の目的を安価且つ高信頼性のもとに達成
できる。According to the method of the present invention, after the high-viscosity repair material is injected and filled, the low-viscosity repair material is injected and filled from another place, so that cracks can be uneven from fine to relatively large. In addition, the repair material can be uniformly injected and filled, the use loss of the repair material can be reduced, and the purpose of repair and regeneration of the foundation pile can be achieved at low cost and high reliability.
【図１】本発明工法の補修対象である基礎杭の概略説明
図である。FIG. 1 is a schematic explanatory view of a foundation pile to be repaired by the method of the present invention.
【図２】本発明工法の高粘度補修材の加圧充填時の状況
を工程順に示す概略説明図である。FIG. 2 is a schematic explanatory view showing a state at the time of pressure filling of a high-viscosity repair material in the method of the present invention in the order of steps.
【図３】同、低粘度補修材の加圧充填時の状況を概略的
に示す説明図である。FIG. 3 is an explanatory view schematically showing a state at the time of pressure filling of a low-viscosity repair material.
１ 基礎杭 ２ フーティング ３ コンクリート構造物 ４ コアボーリング手段 ５ 竪孔 ６ 口元部材 ７ 注入口 ８ アンカ金具 ９ 高粘度樹脂液 １０ 密閉容器 １１ 高圧ボンベ １２ 注入ホース １３ 竪孔 １４ 口元部材 １５ 注入口 １６ 低粘度樹脂液 １７ 密閉容器 １８ 高圧ボンベ １９ 注入ホース DESCRIPTION OF SYMBOLS 1 Foundation pile 2 Footing 3 Concrete structure 4 Core boring means 5 Vertical hole 6 Mouth member 7 Injection port 8 Anchor fitting 9 High-viscosity resin liquid 10 Closed vessel 11 High-pressure cylinder 12 Injection hose 13 Vertical hole 14 Mouth member 15 Inlet 16 Low viscosity resin liquid 17 Sealed container 18 High pressure cylinder 19 Injection hose
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松永 隆善 奈良県生駒郡平群町竜田川３−２−11 (72)発明者 河井 淳 大阪府大阪市平野区加美北８−８−27 コンフォール48 701号 (72)発明者 大日向 正明 三重県名張市桔梗ヶ丘南３−３−20 (56)参考文献 特開 平５−18120（ＪＰ，Ａ) 特開 昭63−223228（ＪＰ，Ａ) 特開 昭64−1864（ＪＰ，Ａ) 特開 平２−161073（ＪＰ，Ａ) 特開 平４−254457（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 37/00 E02D 5/64 E04G 23/02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takayoshi Matsunaga 3-1-11 Tatsudagawa, Heigun-cho, Ikoma-gun, Nara Prefecture (72) Inventor Jun Kawai 8-8-27 Kamikita, Kamikita, Hirano-ku, Osaka-shi, Osaka 48-701 (72) Inventor Masaaki Ohinata 3-3-20 Kikyogaoka Minami, Nabari City, Mie Prefecture (56) References JP-A-5-18120 (JP, A) JP-A-63-223228 (JP, A) JP-A Sho 64-1864 (JP, A) JP-A-2-161703 (JP, A) JP-A-4-254457 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) E02D 37/00 E02D 5/64 E04G 23/02
Claims (3)
補修するに際し、最初に上記基礎杭の上端から下端近く
まで削孔形成した小口径の竪孔を通じ、基礎杭に発生し
ている亀裂部に対し高粘度の有機系補修材又は普通粒径
の無機系補修材の注入充填を行い、しかる後に、上記竪
孔とは外れた位置で、基礎杭の上端から下端近くまで削
孔形成された他の竪孔を通じ、基礎杭に発生している亀
裂部に対し低粘度の有機系補修材又は超微粒径の無機系
補修材の注入充填を行うことを特徴とする基礎杭の補修
工法。When repairing a foundation pile damaged by an earthquake or the like, a crack formed in the foundation pile is first passed through a small-diameter vertical hole drilled from the upper end to the lower end of the foundation pile. Injected and filled a high-viscosity organic repair material or a normal particle size inorganic repair material, and then, at a position deviated from the pit, a hole was formed from the upper end of the foundation pile to near the lower end. A method for repairing a foundation pile, characterized in that a crack formed in the foundation pile is injected and filled with a low-viscosity organic repair material or an ultrafine particle-size inorganic repair material through another shaft.
低粘度樹脂液が１００〜１５００センチポイズ、また高
粘度樹脂液が５０００センチポイズ以上であることを特
徴とする請求項１記載の補修工法。2. The organic repair material is an epoxy resin material,
The repair method according to claim 1, wherein the low-viscosity resin liquid has a viscosity of 100 to 1500 centipoise, and the high-viscosity resin liquid has a viscosity of 5,000 centipoise or more.
普通粒径セメントミルクの平均粒子径が１０〜２０μｍ
であり、超微粒径セメントミルクの平均粒子径が２〜８
μｍであることを特徴とする請求項１記載の補修工法。3. The inorganic repair material is cement milk,
Average particle size of ordinary particle size cement milk is 10-20 μm
And the average particle size of the ultra-fine particle size cement milk is 2 to 8
The repair method according to claim 1, wherein the thickness is μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10872795A JP3245669B2 (en) | 1995-05-02 | 1995-05-02 | Repair method of foundation pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10872795A JP3245669B2 (en) | 1995-05-02 | 1995-05-02 | Repair method of foundation pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08302724A JPH08302724A (en) | 1996-11-19 |
| JP3245669B2 true JP3245669B2 (en) | 2002-01-15 |
Family
ID=14492017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10872795A Expired - Lifetime JP3245669B2 (en) | 1995-05-02 | 1995-05-02 | Repair method of foundation pile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3245669B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2977075B2 (en) * | 1996-07-05 | 1999-11-10 | 株式会社フジタ | Seismic retrofit method for existing reinforced concrete buildings |
| ES2343055B1 (en) * | 2009-01-20 | 2011-06-06 | Alberto Gonzalo Carracedo | PROCEDURE FOR THE REPAIR OF FOUNDATIONS OF AEROGENERATORS. |
| CN101550695B (en) * | 2009-02-10 | 2013-11-13 | 叶长青 | Construction method of reinforcing broken stump by using prestress steel twist-beam replacement grouting method |
| JP5579031B2 (en) * | 2010-11-26 | 2014-08-27 | 学校法人日本大学 | Crack repair method for concrete structure and concrete structure |
| CN103225300B (en) * | 2013-04-18 | 2015-03-18 | 贵州建工集团第二建筑工程有限责任公司 | Process and equipment for reinforcing and strengthening concrete filling pile |
| CN110344404B (en) * | 2019-07-05 | 2021-04-20 | 深圳宏业基岩土科技股份有限公司 | Construction method for treating broken pile of foundation engineering pile |
| CN111042568A (en) * | 2019-12-30 | 2020-04-21 | 中建港航局集团有限公司 | Precast beam crack repairing construction process |
-
1995
- 1995-05-02 JP JP10872795A patent/JP3245669B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08302724A (en) | 1996-11-19 |
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