JP2017203317A - Method of filling leg part of aquatic structure with grout material - Google Patents

Method of filling leg part of aquatic structure with grout material Download PDF

Info

Publication number
JP2017203317A
JP2017203317A JP2016096250A JP2016096250A JP2017203317A JP 2017203317 A JP2017203317 A JP 2017203317A JP 2016096250 A JP2016096250 A JP 2016096250A JP 2016096250 A JP2016096250 A JP 2016096250A JP 2017203317 A JP2017203317 A JP 2017203317A
Authority
JP
Japan
Prior art keywords
grout
hose
grout material
injection
leg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2016096250A
Other languages
Japanese (ja)
Other versions
JP6691430B2 (en
Inventor
大野　俊夫
Toshio Ono
俊夫 大野
栄治 宇佐美
Eiji Usami
栄治 宇佐美
宏二 林田
Koji Hayashida
宏二 林田
健一郎 坂田
Kenichiro Sakata
健一郎 坂田
宮口　克一
Katsuichi Miyaguchi
克一 宮口
あゆみ ▲やなぎ▼沢
あゆみ ▲やなぎ▼沢
Ayumi Yanagisawa
数馬 五十嵐
Kazuma Igarashi
数馬 五十嵐
哲哉 岸田
Tetsuya Kishida
哲哉 岸田
亮 久保
Akira Kubo
亮 久保
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.)
Kajima Corp
Denka Co Ltd
Japan Sea Works Co Ltd
Original Assignee
Kajima Corp
Denka Co Ltd
Japan Sea Works Co Ltd
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 Kajima Corp, Denka Co Ltd, Japan Sea Works Co Ltd filed Critical Kajima Corp
Priority to JP2016096250A priority Critical patent/JP6691430B2/en
Publication of JP2017203317A publication Critical patent/JP2017203317A/en
Application granted granted Critical
Publication of JP6691430B2 publication Critical patent/JP6691430B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Foundations (AREA)

Abstract

PROBLEM TO BE SOLVED: To fill a leg part, which supports an aquatic structure and is in a hollow sectioned shape, with a grout material for joining the leg part to a steel pipe pile supported by water bottom ground while reducing deterioration in quality of the grout material due to mixing with water and mixing of air.SOLUTION: A method comprises: in filling an overlap section between a leg part 1 and a steel pipe pile 5 with a grout material 6 through a grout hole 7 with the grout hose 7, connected to an injection pipe 2 connected to an injection port 1a formed in the leg part 1, from above water, connecting a leg part-side valve 1b and a hose-side valve 7a to the injection port 1a and the grout hose 7; filling the grout hose 7 with the grout material 6 and closing the hose-side valve 7a; after connecting a tip part of the grout hose 7 to the injection port 1a with the leg part-side valve 1b closed, supplying the grout material 6 with the leg part-side valve 1b and hose-side valve 7a open; and allowing the grout material 6 filling the grout hose 7 to flow in between the leg part 1 and the steel pipe pile 5.SELECTED DRAWING: Figure 1

Description

本発明は水上構造物を支持する中空断面形状の脚部を水底地盤に支持される鋼管杭に接合するためのグラウト材を、主に水との混合によるグラウト材の希釈化の他、空気の混入の結果、既に充填されたまだ固まらない状態のグラウト材の圧送時にグラウト材中を圧縮された空気泡が勢いよく上昇することによるグラウト材と水との撹拌による希釈化を低減しながら、脚部に充填するグラウト材の充填方法に関するものである。   In the present invention, the grout material for joining the legs of the hollow cross-sectional shape supporting the water structure to the steel pipe pile supported by the bottom ground is mainly diluted with the water and the air As a result of mixing, it is possible to reduce the dilution due to the agitation of the grout material and water due to the vigorous rise of compressed air bubbles in the grout material when pumping the already filled grout material. It is related with the filling method of the grout material with which a part is filled.

洋上等の水上構造物を支持する中空断面形状の脚部を海底等の水底地盤に支持される鋼管杭にグラウト材の充填により接合する場合、脚部は鋼管杭の回りを包囲した状態で配置されるため、脚部内周面の下端と鋼管杭外周面のいずれか一方にはグラウト材の漏れを防止するためのシール材が装着される。グラウト材は脚部と鋼管杭とが軸方向に重複した区間（以下、重複区間）内の、脚部に接続されるグラウトホース、または上端部が水上に突出する注入管を通じて充填される（特許文献１〜３参照）。   When joining a steel pipe pile supported by a submarine ground such as the seabed by filling a grout material with a leg having a hollow cross section that supports offshore or other floating structures, the leg is placed in a state surrounding the steel pipe pile. Therefore, a sealing material for preventing leakage of the grout material is attached to either the lower end of the leg inner peripheral surface or the steel pipe pile outer peripheral surface. The grout material is filled through a grout hose connected to the leg in the section where the leg and the steel pipe pile overlap in the axial direction (hereinafter referred to as the overlap section), or through an injection pipe whose upper end protrudes above the water (patent) References 1-3).

重複区間へのグラウト材注入の方法としては、脚部の水中区間に形成されたグラウト材注入用の注入口に直接、グラウトホースを接続する場合と、注入口に接続された上記注入管の上端部にグラウトホースを接続する場合がある。前者の方法ではグラウトホースの先端部を水上から潜水士が保持したまま水中に潜水し、注入口に接続する作業を要するが、後者の方法では脚部の水中への設置前に注入口に予め注入管を接続しておくことで、水中での注入管の接続作業は不要になる。   As a method of injecting the grout material into the overlapping section, the grout hose is directly connected to the injection port for injecting the grout material formed in the underwater section of the leg, and the upper end of the injection pipe connected to the injection port. A grout hose may be connected to the section. In the former method, it is necessary to submerge the tip of the grout hose from the surface of the water while diving into the water and connect it to the inlet. Connecting the injection tube eliminates the need for connecting the injection tube in water.

特開２０００−３８７３１号公報（段落００１６〜００１９、図１）JP 2000-38731 A (paragraphs 0016 to 0019, FIG. 1) 特開２０１２−７７５３３号公報（段落００２１〜００４１、図２〜図６）JP 2012-77533 A (paragraphs 0021 to 0041, FIGS. 2 to 6) 特開２０１５−０５５０４５号公報（段落００１９〜００２２、００２９、図１）Japanese Patent Laying-Open No. 2015-055045 (paragraphs 0019 to 0022, 0029, FIG. 1)

一方、注入口にグラウトホースを接続する場合と注入管を接続する場合のいずれも、グラウトホースから注入管内に、または注入口を通じて重複区間にグラウト材を充填するときに、グラウトホース内に洗浄した水が残留していると、グラウトホースにグラウト材を供給した際にグラウト材がグラウトホース内で水と混合して希釈化されることになる。またグラウトホースへのグラウト材の供給時に、グラウトホース内に存在する空気をグラウト材が押し出しながら重複区間に圧送されることによって圧縮された空気泡を押し出すため、空気泡がグラウト材を勢いよく上昇させる結果、グラウト材と上部の水が混合される状態になる。結果としてグラウトホース内の他、グラウト材の充填先の注入管内、もしくは重複区間内において水との混合や空気の混入によるグラウト材の希釈化が生じ、グラウト材の注入不能、または充填後のグラウト材の品質低下が発生する可能性がある。   On the other hand, in both cases of connecting the grout hose to the inlet and connecting the inlet pipe, the grout hose was washed when filling the grout material from the grout hose into the inlet pipe or through the inlet into the overlapping section. If water remains, when the grout material is supplied to the grout hose, the grout material is mixed with water in the grout hose and diluted. Also, when supplying the grout material to the grout hose, the air bubbles push up the grout material vigorously because the air present in the grout hose extrudes compressed air bubbles by being pumped to the overlapping section while pushing out the air. As a result, the grout material and the upper water are mixed. As a result, in the grout hose, in the injection pipe where the grout material is filled, or in the overlapping section, the grout material is diluted by mixing with water or air mixing, so that the grout material cannot be injected or the grout after filling There is a possibility of quality degradation of the material.

注入口に注入管を接続しておく場合では、注入管の上端部が水上に突出するため、注入管内に水が入り込む可能性は低いが、洋上では波浪の影響により注入管の上端部から水が入り込む可能性はある。注入管と脚部との接続部である注入口、またはその付近には水の重複区間への浸入を阻止するための弁が接続されることもあるが、弁は上端部から入り込んだ水の重複区間への浸入を阻止することができるだけであるから、注入管の上端部から入り込んだ水は注入管の下方に溜まることになる。   When the injection pipe is connected to the inlet, the upper end of the injection pipe protrudes above the water, so it is unlikely that water will enter the injection pipe. There is a possibility of entering. A valve may be connected to the inlet, which is the connection between the injection pipe and the leg, or in the vicinity thereof to prevent water from entering the overlapping section. Since it is only possible to prevent the intrusion into the overlapping section, the water that has entered from the upper end of the injection pipe will accumulate below the injection pipe.

注入管内に水が溜まると、注入管を通じてグラウト材を注入するときに注入管内でグラウト材が希釈化され、濃度が低下した状態になり易くなり、最悪の場合、セメントが他の材料と分離してグラウト材が硬化しない状態になる。このため、分離した材料が注入管の下方に堆積して閉塞する可能性があり、注入口の弁を開放させることができたとしても、希釈されたグラウト材が水中に進入することになる結果、希釈化が進み、本来の濃度のグラウト材を脚部と鋼管杭間に充填することができなくなる。   If water accumulates in the injection tube, when the grout material is injected through the injection tube, the grout material is diluted in the injection tube, and the concentration tends to decrease.In the worst case, the cement separates from other materials. As a result, the grout material is not cured. For this reason, there is a possibility that the separated material accumulates below the injection tube and clogs it, and even if the inlet valve can be opened, the diluted grout material will enter the water. As the dilution proceeds, it becomes impossible to fill the grout material with the original concentration between the leg and the steel pipe pile.

本発明は上記背景より、脚部の注入口に注入管を接続する場合とグラウトホースを接続する場合のいずれにおいても、注入ホース内や注入管内で水に洗われることによるグラウト材の材料分離、または注入管下方に溜まる水との混合によるグラウト材の希釈化を回避することが可能な水上構造物における脚部へのグラウト材の充填方法を提案するものである。   From the above background, the present invention is based on the above-mentioned background.In both cases where the injection pipe is connected to the inlet of the leg and the grout hose is connected, the material separation of the grout material by washing with water in the injection hose or the injection pipe, Alternatively, the present invention proposes a method for filling the grouting material into the legs of the floating structure capable of avoiding dilution of the grouting material due to mixing with water accumulated below the injection pipe.

請求項１に記載の発明の水上構造物における脚部へのグラウト材の充填方法は、水上構造物を支持する中空断面形状の脚部を、水底地盤に支持され、前記脚部の内径より小さい外径の鋼管杭の上方寄りの区間の周囲に配置し、この脚部に形成された注入口に直接、もしくは間接的に水上からグラウトホースを接続し、このグラウトホースを通じて前記脚部と前記鋼管杭との間にグラウト材を充填する方法であり、
前記注入口と前記グラウトホースの先端部にはそれぞれ開閉自在な脚部側弁とホース側弁が接続され、前記グラウトホース内に前記グラウト材を充填して前記ホース側弁を閉鎖させ、前記脚部側弁を閉鎖させた状態で前記グラウトホースの先端部を前記注入口に直接、もしくは間接的に接続した後、前記脚部側弁と前記ホース側弁を開放させて前記グラウト材を供給し、前記グラウトホース内に充填されている前記グラウト材を前記脚部と前記鋼管杭との間に流入させることを構成要件とする。 The method for filling a leg portion in a floating structure according to the first aspect of the present invention is such that the leg portion having a hollow cross-sectional shape supporting the floating structure is supported by the bottom bottom ground and is smaller than the inner diameter of the leg portion. A grout hose is placed around the upper section of the outer diameter steel pipe pile, and a grout hose is connected directly or indirectly from the water to the inlet formed in the leg, and the leg and the steel pipe are connected through the grout hose. It is a method of filling grout material between piles,
A leg-side valve and a hose-side valve that can be freely opened and closed are connected to the inlet and the tip of the grout hose, respectively, the grout hose is filled with the grout material to close the hose-side valve, and the leg After directly or indirectly connecting the tip of the grout hose to the inlet with the part side valve closed, the leg part side valve and the hose side valve are opened to supply the grout material. The grouting material filled in the grouting hose is caused to flow between the leg portion and the steel pipe pile.

請求項１における「脚部へのグラウト材の充填方法」は直接的には水上構造物の脚部１の内周面と脚部１を支持する鋼管杭５の外周面との間（以下、重複区間）にグラウト材６を充填する作業（方法）を指しているが、実質的にはその準備段階（前段階）としてのグラウトホース７内へのグラウト材６の充填作業を主な内容とする。グラウト材６は一旦、グラウトホース７内に（密実に）充填された後、重複区間へ流入させられる。水上構造物は例えば風車や観測タワー等の水上構造物を指す。水上は洋上を含み、水底地盤は海底地盤を含む。   The “filling method of the grout material into the leg portion” in claim 1 is directly between the inner peripheral surface of the leg portion 1 of the floating structure and the outer peripheral surface of the steel pipe pile 5 that supports the leg portion 1 (hereinafter, This refers to the operation (method) of filling the grout material 6 into the overlapping section), but the filling operation of the grout material 6 into the grout hose 7 as the preparation stage (previous stage) is substantially the main content. To do. The grout material 6 is once filled (solidly) in the grout hose 7 and then introduced into the overlapping section. The floating structure refers to a floating structure such as a windmill or an observation tower. The surface of the water includes the ocean, and the seabed includes the seabed.

グラウトホース７の脚部１側の先端部は前記したように直接、脚部１の注入口１ａに接続される場合（請求項５）と、注入口１ａに接続された注入管２の、水上より上に突出した上端部に接続される場合（請求項３）がある。前者の場合が請求項１における「グラウトホース７を注入口１ａに直接、接続すること」を言い、後者の場合が「グラウトホース７を注入口１ａに間接的に接続すること」を言う。「注入口１ａ」は後述する接続管２１のグラウトホース７側の接続口を含む。   When the tip of the grout hose 7 on the leg 1 side is directly connected to the inlet 1a of the leg 1 as described above (Claim 5), the water in the inlet pipe 2 connected to the inlet 1a There is a case (claim 3) when connected to the upper end protruding further upward. The former case refers to “directly connecting the grout hose 7 to the inlet 1a” in claim 1, and the latter case refers to “indirectly connecting the grout hose 7 to the inlet 1a”. The “injection port 1a” includes a connection port on the grout hose 7 side of the connection pipe 21 to be described later.

脚部１の注入口１ａ（接続管２１）に注入管２を接続することには、前記のように注入口１ａに直接、グラウトホース７を接続する場合のように潜水士による水中での注入口１ａへの接続作業を不要にできる意味がある。但し、グラウトホース７内に注入したグラウト材６中への空気の混入によるグラウト材６の希釈化を低減する効果とは直接、関係ないため、注入口１ａへの注入管２の接続がグラウト材６の希釈化を解消させることにはならない。   In order to connect the injection tube 2 to the injection port 1a (connecting tube 21) of the leg 1, the submerged person can add water in the water as in the case where the grout hose 7 is directly connected to the injection port 1a as described above. There is a meaning that connection work to the entrance 1a can be made unnecessary. However, since there is no direct relationship with the effect of reducing the dilution of the grout material 6 due to the mixing of air into the grout material 6 injected into the grout hose 7, the connection of the injection pipe 2 to the injection port 1a is connected to the grout material. This does not eliminate the 6 dilution.

グラウトホース７が注入口１ａに直接、接続される場合（請求項５）、グラウトホース７内に充填されたグラウト材６は注入口１ａを通じて重複区間（脚部１と鋼管杭５との間）に充填される。グラウトホース７が注入管２に接続される場合（請求項３）、グラウト材６は一旦、グラウトホース７から注入管２内に流入させられた後、注入管２から注入口１ａを通じて重複区間に流入させられる。いずれの場合にも図１−（ａ）等に示すように注入口１ａには後述する、脚部側弁１ｂ付きの接続管２１が直接、接続される場合があり、その場合、接続管２１にグラウトホース７、もしくは注入管２が接続される。   When the grout hose 7 is directly connected to the inlet 1a (Claim 5), the grout material 6 filled in the grout hose 7 overlaps through the inlet 1a (between the leg 1 and the steel pipe pile 5). Filled. When the grout hose 7 is connected to the injection pipe 2 (Claim 3), the grout material 6 is once allowed to flow into the injection pipe 2 from the grout hose 7, and then into the overlapping section from the injection pipe 2 through the injection port 1a. Inflow. In any case, as shown in FIG. 1- (a) or the like, a connection pipe 21 with a leg-side valve 1b, which will be described later, may be directly connected to the injection port 1a. The grout hose 7 or the injection pipe 2 is connected to the pipe.

図１−（ａ）に示すように脚部１の下端部の内周面とこれに対向する鋼管杭５の外周面のいずれか一方には、重複区間に充填されるグラウト材６の流出を阻止する、弾性を有するシール材３が装着されて他方に密着し、周方向に連続することにより脚部１と鋼管杭５との間の水密性を確保する。シール材３が装着側（脚部１、または鋼管杭５）の反対側（鋼管杭５、または脚部１）に密着した状態はその状態の安全性を高める上では、主に注入口１ａの下方に充填される予備グラウト材６１の重さによって確保される（請求項７）。   As shown in FIG. 1- (a), the outflow of the grout material 6 filled in the overlapping section is caused on either the inner peripheral surface of the lower end portion of the leg portion 1 or the outer peripheral surface of the steel pipe pile 5 opposed thereto. The sealing material 3 having elasticity to be blocked is attached and closely attached to the other, and is continuous in the circumferential direction to ensure water tightness between the leg portion 1 and the steel pipe pile 5. The state in which the sealing material 3 is in close contact with the mounting side (the leg portion 1 or the steel pipe pile 5) (steel pipe pile 5 or the leg portion 1) is mainly used to improve the safety of the state. This is ensured by the weight of the preliminary grout material 61 filled downward (Claim 7).

シール材３は図１に示すように脚部１の下端部の内周面に装着される場合と、その内周側に対向する鋼管杭５の外周面に装着される場合がある。いずれの場合もシール材３の上に充填されるグラウト材６の下方への漏れ出しを防止するために、下端部は装着される側に位置し、上端部は対向する側に密着する。図示するようにシール材３の下端部が脚部１側に位置する場合、シール材３の下端部は脚部１に装着され、鋼管杭５側に位置する場合には鋼管杭５に装着される。シール材３は下端部から上端部へかけて対向する側へ張り出し、上端部がその側に密着する。「装着」とは、脚部１、もしくは鋼管杭５の周方向に沿い、連続して埋め込まれるか、挟持される、あるいは接着等されることにより保持されることを言う。   As shown in FIG. 1, the sealing material 3 may be attached to the inner peripheral surface of the lower end portion of the leg portion 1 or may be attached to the outer peripheral surface of the steel pipe pile 5 facing the inner peripheral side. In any case, in order to prevent the grout material 6 filled on the sealing material 3 from leaking downward, the lower end portion is positioned on the mounting side, and the upper end portion is in close contact with the opposite side. As shown in the drawing, when the lower end portion of the sealing material 3 is located on the leg portion 1 side, the lower end portion of the sealing material 3 is attached to the leg portion 1, and when located on the steel pipe pile 5 side, it is attached to the steel pipe pile 5. The The sealing material 3 protrudes from the lower end portion to the upper end portion to the opposite side, and the upper end portion is in close contact with the side. “Mounting” means to be held by being continuously embedded, clamped, or bonded along the circumferential direction of the leg 1 or the steel pipe pile 5.

脚部１を鋼管杭５の周囲に配置した後に、脚部１が波浪や風の影響を受けて鋼管杭５に対して相対変形する可能性がある場合には、グラウトホース７、もしくは注入管２からグラウト材６を重複区間に継続（連続）して流入させる以前に、図２−（ｂ）に示すように一部のグラウト材６が先行してシール材３上に流入させられ、硬化させられる。具体的にはシール材３がグラウト材６中に埋没する程度までグラウトホース７内、もしくは注入管２内の一部のグラウト材６が予備グラウト材６１として重複区間の下方に先行して流入させられる（請求項７）。   When the leg 1 is arranged around the steel pipe pile 5 and there is a possibility that the leg 1 is deformed relative to the steel pipe pile 5 due to the influence of waves or wind, the grout hose 7 or the injection pipe Before the grouting material 6 is continuously flowed into the overlapping section from 2 (see FIG. 2B), a part of the grouting material 6 is made to flow on the sealing material 3 as shown in FIG. Be made. Specifically, a part of the grout material 6 in the grout hose 7 or the injection pipe 2 is allowed to flow in advance as a preliminary grout material 61 below the overlapping section until the sealing material 3 is buried in the grout material 6. (Claim 7).

予備グラウト材６１は脚部１が鋼管杭５の周囲に配置された状態で、継続（連続）して充填されるグラウト材６に先行して重複区間に充填され、先行して硬化することによりシール材３の上端部が鋼管杭５や脚部１から分離しない（浮き上がらない）程度にシール材３を押さえ付けてシール材３の変形を拘束し、シール材３の上端部が上向きの水圧により鋼管杭５や脚部１から分離する事態を回避する。シール材３が硬化する予備グラウト材６１に拘束される上では、実質的に弾性変形できない状態になる高さまでシール材３が予備グラウト材６１中に埋設されればよく、必ずしもシール材３の軸方向の全高が予備グラウト材６１中に完全に埋没することは必要ではない。   The preliminary grouting material 61 is filled in the overlapping section prior to the grouting material 6 that is continuously (continuously) filled in the state in which the legs 1 are arranged around the steel pipe pile 5 and is hardened in advance. The seal material 3 is pressed down to the extent that the upper end portion of the seal material 3 does not separate from the steel pipe pile 5 and the leg portion 1 (is not lifted), and the deformation of the seal material 3 is restrained, and the upper end portion of the seal material 3 is caused by upward water pressure. The situation which isolate | separates from the steel pipe pile 5 and the leg part 1 is avoided. When the sealing material 3 is constrained by the hardened preliminary grout material 61, the sealing material 3 may be embedded in the preliminary grout material 61 to a height at which the sealing material 3 cannot be elastically deformed. It is not necessary for the total height in the direction to be completely buried in the preliminary grout material 61.

鋼管杭５の外径は脚部１の内径より小さく、脚部１は鋼管杭５の形状（外径）に対応した中空断面形状であるため、脚部１には円形断面の、主に鋼管が使用される。注入口１ａは脚部１の軸方向の、鋼管杭５との重複区間の内、シール材３の下端部より上の位置に形成される。注入口１ａは前記のように重複区間へのグラウト材６充填用に脚部１に接続される注入管２の先端部、もしくはグラウトホース７の先端部と脚部１との接続部を指す。   Since the outer diameter of the steel pipe pile 5 is smaller than the inner diameter of the leg portion 1 and the leg portion 1 has a hollow cross-sectional shape corresponding to the shape (outer diameter) of the steel pipe pile 5, the leg portion 1 has a circular cross section, mainly a steel pipe. Is used. The injection port 1 a is formed at a position above the lower end portion of the sealing material 3 in the overlapping section with the steel pipe pile 5 in the axial direction of the leg portion 1. As described above, the injection port 1a indicates the tip of the injection tube 2 connected to the leg 1 for filling the grout material 6 into the overlapping section or the connection between the tip of the grout hose 7 and the leg 1.

図面では脚部１の注入口１ａへの注入管２、もしくはグラウトホース７の接続のし易さを高めるために、注入口１ａの注入管２等側に接続管２１を接続している。また請求項１では注入管２、もしくはグラウトホース７の先端部と脚部１との間に、注入管２、もしくはグラウトホース７内に充填されているグラウト材６の重複区間への流入の可否状態を切り換える脚部側弁１ｂが接続されることから、図面では接続管２１に脚部側弁１ｂを接続している。脚部側弁１ｂは注入口１ａの重複区間側に、または注入管２の脚部１側の先端部に接続されることもあり、それらの場合、接続管２１は必ずしも使用されない。   In the drawing, in order to increase the ease of connection of the injection tube 2 or the grout hose 7 to the injection port 1a of the leg 1, a connection tube 21 is connected to the injection tube 2 or the like side of the injection port 1a. Further, in the first aspect, whether or not the injection pipe 2 or the grout material 6 filled in the grout hose 7 is allowed to flow into the overlapping section between the tip portion of the injection pipe 2 or the grout hose 7 and the leg 1. Since the leg side valve 1b for switching the state is connected, the leg side valve 1b is connected to the connecting pipe 21 in the drawing. The leg side valve 1b may be connected to the overlapping section side of the injection port 1a or to the distal end portion of the injection pipe 2 on the leg 1 side, and in that case, the connection pipe 21 is not necessarily used.

グラウトホース７のグラウト材供給側（先端部の反対側）から供給されるグラウト材６の注入管２、もしくは重複区間（以下、注入管２等）内への流入時に、グラウトホース７を単純にグラウト材６充填用のホースとして使用するだけであれば、グラウト材６の注入管２等内への流入時にグラウトホース７内に存在している空気がグラウト材６中に混入し易くなるか、グラウト材６に先行して注入管２等内に放出され易い状況になる。この結果、注入管２等内に充填された後のグラウト材６内に空気泡が混入し、圧送によって圧縮された空気泡が重複区間に押し出され、グラウト材６の中を勢いよく上昇して上方に抜ける際に、グラウト材６の上部の海水を撹乱してグラウト材６を希釈化することが発生する可能性がある。   When the grout material 6 supplied from the grout material supply side (opposite the tip) of the grout hose 7 flows into the injection pipe 2 or the overlapping section (hereinafter referred to as the injection pipe 2 or the like), the grout hose 7 is simply If it is only used as a hose for filling the grout material 6, is the air present in the grout hose 7 easily mixed into the grout material 6 when the grout material 6 flows into the injection pipe 2 or the like? It becomes easy to be discharged into the injection tube 2 or the like prior to the grout material 6. As a result, air bubbles are mixed into the grout material 6 after being filled in the injection tube 2 and the like, and the air bubbles compressed by the pressure feeding are pushed out into the overlapping section, and the grout material 6 rises vigorously. When exiting upward, the seawater above the grout material 6 may be disturbed to dilute the grout material 6.

これに対し、請求項１ではグラウトホース７内にグラウト材６を充填してホース側弁７ａを閉鎖させ、脚部側弁１ｂを閉鎖させた状態でグラウトホース７の先端部を注入口１ａに直接、もしくは間接的に接続した後、脚部側弁１ｂとホース側弁７ａを開放させてグラウトホース７内のグラウト材６を重複区間に直接、もしくは間接的に流入させることで、グラウトホース７内に存在している空気の量を低減することが可能になる。「直接」はグラウトホース７を注入口１ａに接続する場合、「間接的に」は注入管２を注入口１ａに接続する場合を言う。   In contrast, in claim 1, the grout hose 7 is filled with the grout material 6, the hose side valve 7a is closed, and the leg side valve 1b is closed, and the tip of the grout hose 7 is used as the inlet 1a. After connecting directly or indirectly, the leg portion side valve 1b and the hose side valve 7a are opened, and the grout material 6 in the grout hose 7 is directly or indirectly flowed into the overlapping section, so that the grout hose 7 It is possible to reduce the amount of air present in the interior. “Directly” refers to the case where the grout hose 7 is connected to the inlet 1a, and “indirectly” refers to the case where the inlet tube 2 is connected to the inlet 1a.

グラウトホース７を注入口１ａに直接、接続する場合（請求項５）、脚部側弁１ｂとホース側弁７ａの開放時に、グラウトホース７のグラウト材供給側からグラウト材６が供給されることで、グラウトホース７内のグラウト材６が直接、重複区間内に流入する。グラウト材６の重複区間内への流入後も、グラウト材６は供給され続けるが、シール材３に下方から作用する水圧にシール材３を抵抗させる必要がある場合、シール材３の拘束（変形防止）のために上記した予備グラウト材６１が充填される場合（請求項７）には、この予備グラウト材６１が硬化するまでグラウト材６の供給は停止させられる。   When the grout hose 7 is directly connected to the inlet 1a (Claim 5), the grout material 6 is supplied from the grout material supply side of the grout hose 7 when the leg side valve 1b and the hose side valve 7a are opened. Thus, the grout material 6 in the grout hose 7 flows directly into the overlapping section. Even after the grout material 6 flows into the overlapping section, the grout material 6 continues to be supplied, but when it is necessary to make the seal material 3 resist the water pressure acting on the seal material 3 from below, the seal material 3 is restrained (deformed). When the above-mentioned preliminary grout material 61 is filled for prevention (claim 7), the supply of the grout material 6 is stopped until the preliminary grout material 61 is cured.

グラウトホース７を注入管２に接続する場合（請求項３）には、脚部側弁１ｂが閉鎖状態のままホース側弁７ａが開放されることによりグラウトホース７内のグラウト材６が注入管２内に流入し、充填される。その後、ホース側弁７ａが開放させられたまま、脚部側弁１ｂが開放されることにより注入管２内からグラウト材６が重複区間内に流入させられる。   When the grout hose 7 is connected to the injection pipe 2 (Claim 3), the grout material 6 in the grout hose 7 is opened by opening the hose side valve 7a while the leg side valve 1b is closed. 2 flows into and is filled. Thereafter, with the hose side valve 7a being opened, the leg portion side valve 1b is opened, whereby the grout material 6 is caused to flow into the overlapping section from the injection pipe 2.

注入管２内にグラウトホース７から充填されたグラウト材６は脚部側弁１ｂ寄りの下方に充填され、流動化している状態で脚部側弁１ｂに堰き止められるため、脚部側弁１ｂの開放時に注入管２内から直接、重複区間内に流入する。グラウト材６の重複区間内への流入と同時に、注入管２内に充填されているグラウト材６の量が減少して負圧にならないよう、グラウトホース７の、グラウト材６の供給側からはグラウト材６が供給され続ける。   The grout material 6 filled from the grout hose 7 into the injection tube 2 is filled below the leg side valve 1b and is blocked by the leg side valve 1b in a fluidized state. Flows into the overlapping section directly from the injection pipe 2 when the valve is opened. From the grout material 6 supply side of the grout hose 7 so that the amount of the grout material 6 filled in the injection pipe 2 does not decrease and become negative pressure simultaneously with the inflow of the grout material 6 into the overlapping section. The grout material 6 continues to be supplied.

グラウトホース７内にグラウト材６が充填されたときにホース側弁７ａが閉鎖させられる。グラウトホース７が注入口１ａに接続される場合、脚部側弁１ｂが閉鎖状態のまま、注入口１ａ（接続管２１）にホース側弁７ａが閉鎖しているグラウトホース７が接続される。グラウトホース７が注入管２に接続される場合、注入口１ａ（接続管２１）に接続された注入管２にホース側弁７ａが閉鎖しているグラウトホース７が接続される。   When the grout material 6 is filled in the grout hose 7, the hose side valve 7a is closed. When the grout hose 7 is connected to the injection port 1a, the grout hose 7 in which the hose side valve 7a is closed is connected to the injection port 1a (connection pipe 21) while the leg side valve 1b is closed. When the grout hose 7 is connected to the injection pipe 2, the grout hose 7 in which the hose side valve 7a is closed is connected to the injection pipe 2 connected to the injection port 1a (connection pipe 21).

いずれの場合も、脚部側弁１ｂ開放時のグラウト材６の重複区間への流入時には、注入口１ａ直前で重複区間への流入を待つグラウト材６がグラウトホース７内、または注入管２内で密実に充填された状態になるため、重複区間内に充填されるグラウト材６中に空気が混入する可能性が低下し、空気の混入による重複区間への充填時のグラウト材６と水との混合によるグラウト材６の品質低下が回避される。   In any case, when the grouting material 6 flows into the overlapping section when the leg valve 1b is opened, the grouting material 6 waiting to flow into the overlapping section immediately before the inlet 1a is in the grouting hose 7 or in the injection pipe 2. Therefore, the possibility that air is mixed in the grout material 6 filled in the overlapping section is reduced, and the grout material 6 and water at the time of filling the overlapping section due to air mixing are reduced. The deterioration of the quality of the grout material 6 due to the mixing is avoided.

特にグラウトホース７内の、グラウト材６の供給側に、グラウトホース７の内周面に密着可能で、グラウト材６の注入時の圧力を受けてグラウトホース７の先端側へ移動可能な仕切り材８を挿入しておけば（請求項２）、注入管２等内に充填されるグラウト材６とグラウトホース７内に残留していた洗浄水が混合する可能性を低下させることが可能になる。この場合、グラウトホース７内にグラウト材６を供給し、仕切り材８がグラウトホース７の注入管２等側の先端部から放出されたときにホース側弁７ａを閉鎖させることで（請求項２）、グラウトホース７内に充填されるグラウト材６の品質と密実性を高めることができるため、グラウトホース７内のグラウト材６中への空気の混入を防止し、グラウト材６の品質不良を解消することの確実性が高まる。   In particular, a partition material that can be brought into close contact with the inner peripheral surface of the grout hose 7 on the supply side of the grout material 6 in the grout hose 7 and can be moved to the front end side of the grout hose 7 by receiving pressure when the grout material 6 is injected. If 8 is inserted (Claim 2), it is possible to reduce the possibility that the grout material 6 filled in the injection tube 2 and the like and the washing water remaining in the grout hose 7 are mixed. . In this case, the grout material 6 is supplied into the grout hose 7, and the hose side valve 7 a is closed when the partition material 8 is discharged from the tip of the grout hose 7 on the injection pipe 2 side or the like (claim 2). ) Since the quality and the solidity of the grout material 6 filled in the grout hose 7 can be improved, the mixing of air into the grout material 6 in the grout hose 7 is prevented, and the quality of the grout material 6 is poor. The certainty of eliminating is increased.

仕切り材８がグラウトホース７から放出されたとき、グラウトホース７内にはグラウト材６が充填され（充満し）、ホース側弁７ａが閉鎖させられることで、グラウト材６の充填（充満）状態が維持される。ホース側弁７ａは仕切り材８がグラウトホース７の（注入管２側）先端から放出されるまでは開放状態に保たれるが、仕切り材８がグラウトホース７から放出された時点で一旦、閉鎖させられる（請求項２）。その後、ホース側弁７ａはグラウトホース７内のグラウト材６の注入管２等内への流入時に開放させられる。   When the partition material 8 is discharged from the grout hose 7, the grout hose 7 is filled (filled) with the grout material 6, and the hose side valve 7a is closed, so that the grout material 6 is filled (filled). Is maintained. The hose side valve 7a is kept open until the partition material 8 is released from the tip of the grout hose 7 (on the injection tube 2 side), but is temporarily closed when the partition material 8 is released from the grout hose 7. (Claim 2). Thereafter, the hose side valve 7a is opened when the grout material 6 in the grout hose 7 flows into the injection pipe 2 or the like.

請求項２ではグラウトホース７から仕切り材８が放出され、グラウト材６が充填された（充満した）グラウトホース７を脚部側弁１ｂが閉鎖した状態の注入口１ａ（接続管２１）、もしくは注入管２に接続した後、ホース側弁７ａを開放させてグラウト材６の供給を開始することによりグラウトホース７内に充填されているグラウト材６を注入管２等（注入管２、もしくは重複区間）内に吐出させ、充填させることになる。   In Claim 2, the partition material 8 is discharged from the grout hose 7, and the grout hose 7 filled (filled) with the grout material 6 is filled with the inlet 1a (connection pipe 21) with the leg-side valve 1b closed, or After connecting to the injection pipe 2, the hose side valve 7a is opened and the supply of the grout material 6 is started, whereby the grout material 6 filled in the grout hose 7 is injected into the injection pipe 2 or the like (injection pipe 2 or overlapping) (Section) is discharged and filled.

グラウトホース７内に挿入される仕切り材８はその外周側のグラウトホース７の内周面から放射方向中心側へ圧縮力を受けることにより収縮するポリウレタン、発泡ポリエチレン等のスポンジ等の弾性体であり、グラウトホース７の内周面の全周に密着し得るよう、グラウトホース７の内周面の断面形状に対応した例えば球状、もしくは円柱状等の断面形状をする。   The partition member 8 inserted into the grout hose 7 is an elastic body such as a sponge such as polyurethane or foamed polyethylene that contracts by receiving a compressive force from the inner peripheral surface of the grout hose 7 on the outer peripheral side toward the radial center. The cross-sectional shape such as a spherical shape or a cylindrical shape corresponding to the cross-sectional shape of the inner peripheral surface of the grout hose 7 is formed so as to be in close contact with the entire inner peripheral surface of the grout hose 7.

仕切り材８はグラウトホース７内の、グラウト材６の供給側に挿入された状態からグラウト材６が圧送（圧入）されることでグラウトホース７の先端側へ押し込まれ、最終的には押し出される。仕切り材８は本来、グラウト材６を圧送する前にグラウトホース７内を水等の液体で洗浄する場合に、洗浄後にグラウトホース７に残留している液体を除去し、グラウト材６と液体がグラウトホース７内で混合して希釈化することがないようにする目的でグラウトホース７内に挿入される。   The partition material 8 is pushed into the front end side of the grout hose 7 by being pumped (press-fitted) from the state inserted in the grout material 6 supply side in the grout hose 7, and finally pushed out. . The partition material 8 originally removes the liquid remaining in the grout hose 7 after cleaning when the grout hose 7 is cleaned with a liquid such as water before the grout material 6 is pumped. It is inserted into the grout hose 7 for the purpose of avoiding dilution by mixing in the grout hose 7.

グラウトホース７の先端部が注入管２に接続される場合（請求項３）、グラウトホース７内にグラウト材６が充満した状態でグラウトホース７の先端部が注入管２に接続され、グラウト材６の供給が継続されることで、ホース側弁７ａの開放によりグラウト材６が注入管２内に流入する。このとき、注入管２内へのグラウト材６の流入が開始されるまで、重複区間内に存在している水が注入管２内に入り込まないよう、脚部側弁１ｂは閉鎖状態に保たれる。前記のように注入口１ａに接続管２１が接続された場合、注入管２の注入口１ａ側の先端部（下端部）は接続管２１に接続される。   When the tip of the grout hose 7 is connected to the injection tube 2 (Claim 3), the tip of the grout hose 7 is connected to the injection tube 2 in a state where the grout hose 7 is filled with the grout material 6. As the supply of 6 continues, the grout material 6 flows into the injection pipe 2 by opening the hose side valve 7a. At this time, the leg-side valve 1b is kept closed so that water existing in the overlapping section does not enter the injection pipe 2 until the inflow of the grout material 6 into the injection pipe 2 is started. It is. When the connection pipe 21 is connected to the injection port 1 a as described above, the tip end (lower end) of the injection tube 2 on the injection port 1 a side is connected to the connection tube 21.

グラウトホース７から注入管２内に流入したグラウト材６は一旦、注入管２内に充填され、注入管２内の空気を排出した後、脚部側弁１ｂの開放により重複区間内に流入する。注入管２内の空気は注入管２内へのグラウト材６の充填に伴い、例えば注入管２の上端部等の空気抜き孔等から排出される。グラウトホース７から吐出したグラウト材６が注入管２内に空気が混入しない状態に充填されるまでは、グラウト材６が重複区間内に流入しないよう、脚部側弁１ｂは閉鎖状態に保たれ、グラウト材６を堰き止める働きをする。注入管２内へのグラウト材６充填が済んだ時点で脚部側弁１ｂはホース側弁７ａと共に開放させられ、注入管２内のグラウト材６が重複区間内へ流入させられる。繰り返して述べているようにシール材３の変形防止のために重複区間内に予備グラウト材６１が先行して充填される場合（請求項７）には、予備グラウト材６１の硬化までグラウト材６の供給は停止させられる。   The grout material 6 that has flowed into the injection pipe 2 from the grout hose 7 is once filled in the injection pipe 2, and after the air in the injection pipe 2 is discharged, it flows into the overlapping section by opening the leg side valve 1 b. . The air in the injection tube 2 is discharged from, for example, an air vent hole such as the upper end of the injection tube 2 as the grout material 6 is filled into the injection tube 2. Until the grout material 6 discharged from the grout hose 7 is filled in a state where no air is mixed into the injection pipe 2, the leg side valve 1b is kept closed so that the grout material 6 does not flow into the overlapping section. It works to dam the grout material 6. When the grouting material 6 is filled into the injection pipe 2, the leg side valve 1b is opened together with the hose side valve 7a, and the grouting material 6 in the injection pipe 2 flows into the overlapping section. As described repeatedly, when the preliminary grout material 61 is filled in advance in the overlapping section to prevent the deformation of the sealing material 3 (Claim 7), the grout material 6 is cured until the preliminary grout material 61 is cured. The supply of is stopped.

グラウトホース７の先端部は前記のように脚部１の注入口１ａ（接続管２１）に接続された注入管２の上端部等に接続される場合（請求項３）と、直接、注入口１ａ（接続管２１）に接続される場合（請求項５）があるが、注入管２に接続される場合（請求項３）、グラウト材６はグラウトホース７から注入管２内に充填され、注入管２から重複区間に流入する。グラウトホース７の接続位置は必ずしも注入管２の上端部である必要はない。   When the tip of the grout hose 7 is connected to the upper end of the injection tube 2 connected to the injection port 1a (connection tube 21) of the leg 1 as described above (Claim 3), the injection port directly 1a (connection pipe 21) may be connected (Claim 5), but when connected to injection pipe 2 (Claim 3), the grout material 6 is filled into the injection pipe 2 from the grout hose 7, It flows from the injection pipe 2 into the overlapping section. The connection position of the grout hose 7 is not necessarily the upper end portion of the injection pipe 2.

グラウトホース７から注入管２内に充填されたグラウト材６はその後、重複区間に充填されるため、注入管２内のグラウト材６の、重複区間への流入時には脚部側弁１ｂは開放させられ、グラウト材６供給の継続のためにホース側弁７ａも開放させられる。脚部側弁１ｂとホース側弁７ａの開放とグラウト材６の注入（供給）の継続により注入管２内に充填されたグラウト材６が脚部１と鋼管杭５との重複区間に送り込まれ、前記のようにシール材３上に下方から上方へ向けて充填されていく。   Since the grout material 6 filled in the injection pipe 2 from the grout hose 7 is then filled in the overlapping section, the leg side valve 1b is opened when the grout material 6 in the injection pipe 2 flows into the overlapping section. Then, the hose side valve 7a is also opened to continue the supply of the grout material 6. The grout material 6 filled in the injection pipe 2 is fed into the overlapping section between the leg 1 and the steel pipe pile 5 by opening the leg side valve 1b and the hose side valve 7a and continuing the injection (supply) of the grout material 6. As described above, the sealing material 3 is filled from the bottom to the top.

注入口１ａに注入管２が接続される場合（請求項３）、前記のように注入口１ａ、もしくは接続管２１に接続された脚部側弁１ｂが閉鎖した状態でも、洋上での波浪の影響を受けて注入管２内に上端部から入り込んだ場合の水は注入管２の下方から溜まった状態にある。この状態のまま、グラウトホース７からのグラウト材６の注入管２への充填が開始されると、前記のように注入管２内に注入されたグラウト材６が水と混合することによる希釈化が生じる可能性が高まる。   When the injection pipe 2 is connected to the injection port 1a (Claim 3), even if the leg side valve 1b connected to the injection port 1a or the connection pipe 21 is closed as described above, When the water enters the injection tube 2 from the upper end under the influence, the water is accumulated from below the injection tube 2. In this state, when the filling of the grout material 6 from the grout hose 7 into the injection tube 2 is started, the diluting by mixing the grout material 6 injected into the injection tube 2 with water as described above. Is more likely to occur.

そこで、注入口１ａに接続され、上端部が水上より上に突出した注入管２の上端部を通じ、注入管２の内部に存在する水を排出した後、注入管２にグラウトホース７を接続し、注入管２へのグラウト材６の注入（流入）を開始することをすれば（請求項４）、注入口１ａに注入管２を接続する場合（請求項３）に、グラウト材６が水と混合することによる希釈化の可能性を低下させることが可能になる。   Therefore, after the water existing in the injection pipe 2 is discharged through the upper end portion of the injection pipe 2 connected to the injection port 1a and the upper end portion protruding above the water, the grout hose 7 is connected to the injection pipe 2. If the injection (inflow) of the grout material 6 into the injection tube 2 is started (Claim 4), the grout material 6 is water when the injection tube 2 is connected to the injection port 1a (Claim 3). The possibility of dilution by mixing with can be reduced.

グラウトホース７を通じての注入管２内へのグラウト材６の注入（請求項３）に先立ち、注入管２の内部に存在する水が排出されることで（請求項４）、注入管２内に注入されたグラウト材６が水と混合することによる希釈化が回避されるため、注入管２内に充填されたグラウト材６は製造時の濃度、あるいは粘度を維持することが可能になる。   Prior to the injection of the grouting material 6 into the injection tube 2 through the grout hose 7 (Claim 3), the water present in the injection tube 2 is discharged (Claim 4), so that the injection tube 2 is filled with water. Since dilution by mixing the injected grout material 6 with water is avoided, the grout material 6 filled in the injection tube 2 can maintain the concentration or viscosity at the time of manufacture.

脚部１に接続された注入管２内に存在する水は下方側に溜まっているため、注入管２内の水の排出は図２−（ａ）に示すように注入管２の下端部に到達する排水ホース９を注入管２内に挿入し、排水ホース９の水上側の先端部等に排水（真空）ポンプを接続することにより行われる。排水ホース９は水上より突出した注入管２の上端部等から挿入され、挿入側の先端部は図１−（ａ）に示すように先端が注入管２の下端、またはその付近に到達するまで注入管２内に挿入される。   Since the water existing in the injection pipe 2 connected to the leg 1 is accumulated on the lower side, the water in the injection pipe 2 is discharged to the lower end of the injection pipe 2 as shown in FIG. The drainage hose 9 to be reached is inserted into the injection pipe 2, and a drainage (vacuum) pump is connected to the tip of the drainage hose 9 on the water side. The drainage hose 9 is inserted from the upper end of the injection tube 2 protruding from the water, and the distal end of the insertion side is until the distal end reaches the lower end of the injection tube 2 or its vicinity as shown in FIG. It is inserted into the injection tube 2.

なお、注入管２は必ずしも脚部１の軸方向に平行に配置される必要はないが、注入管２の上端部に接続されるグラウトホース７の先端から吐出されるグラウト材６の注入管２内への充填性を上げ、波浪の影響を受けにくくする上では、注入管２は脚部１の外周面に沿い、脚部１の軸方向に平行に配置されることが適切である。注入管２が鉛直方向を向けば、グラウトホース７から吐出したグラウト材６は自重で注入管２内を降下し易くなるため、充填効率が上がることによる。   The injection tube 2 is not necessarily arranged parallel to the axial direction of the leg 1, but the injection tube 2 of the grout material 6 discharged from the tip of the grout hose 7 connected to the upper end of the injection tube 2. In order to improve the filling property into the inside and make it less susceptible to waves, it is appropriate that the injection tube 2 is disposed along the outer peripheral surface of the leg 1 and parallel to the axial direction of the leg 1. If the injection pipe 2 is directed vertically, the grout material 6 discharged from the grout hose 7 is likely to descend in the injection pipe 2 by its own weight, thereby increasing the filling efficiency.

脚部１と鋼管杭５との重複区間には、脚部１は鋼管杭５の地盤への定着後に水中に降下させられることで、鋼管杭５の外周に脚部１を設置した時点から水が入り込んだ状態になる。このため、グラウト材６の重複区間への流入と阻止を切り換える脚部側弁１ｂを開放させ、注入管２内、もしくはグラウトホース７内に充填されているグラウト材６が注入口１ａに通じて重複区間へ流入したときに、流入先に存在する水と混合することによりグラウト材６が希釈化されることも想定され得る。   In the overlapping section of the leg 1 and the steel pipe pile 5, the leg 1 is lowered into the water after the steel pipe pile 5 is fixed on the ground, so that the water from the time when the leg 1 is installed on the outer periphery of the steel pipe pile 5 Enters the state. For this reason, the leg side valve 1b for switching between inflow and prevention of the grout material 6 into the overlapping section is opened, and the grout material 6 filled in the injection pipe 2 or the grout hose 7 leads to the injection port 1a. It can also be assumed that the grout material 6 is diluted by mixing with water present at the inflow destination when it flows into the overlapping section.

但し、請求項４では注入管２の内部に存在する水がグラウト材６の注入前に排出されることで、前記のようにグラウト材６が希釈化される可能性が低く、注入管２内に充填されたときのグラウト材６は製造時の濃度を維持し易いため、水より比重の大きい状態の濃度の高いグラウト材６は水の下に回り込み、重複区間には下方側へ留まろうとする。注入口１ａ（接続管２１）にグラウトホース７を接続する場合（請求項５）には、グラウトホース７内には元々、水が存在しないことから、注入口１ａ（接続管２１）からは製造時の濃度を維持したグラウト材６が重複区間に充填されるため、この場合も重複区間には下方側へ留まろうとする。   However, in claim 4, the water present in the injection pipe 2 is discharged before the injection of the grout material 6, so that the possibility that the grout material 6 is diluted as described above is low. Since the grout material 6 when it is filled is easy to maintain the concentration at the time of manufacture, the high-concentration grout material 6 having a higher specific gravity than water wraps under the water and tries to stay downward in the overlapping section. To do. When the grout hose 7 is connected to the inlet 1a (connecting pipe 21) (Claim 5), since no water originally exists in the grout hose 7, it is manufactured from the inlet 1a (connecting pipe 21). Since the grout material 6 maintaining the concentration at the time is filled in the overlapping section, in this case as well, the grout material 6 tends to stay downward in the overlapping section.

加えて鋼管杭５の上端面は水上に位置することで、重複区間に入り込み、充満している水の上面は大気中にあり、１気圧の大気圧を受けているから、水中での水圧（１＋０．１／水深１ｍ当たり）気圧）よりは小さい。このため、例えば特開２００５−１６００６号公報のように水中で閉鎖空間内に存在する水を抜くことに要する圧力（段落００５１、図８）より小さい圧力で重複区間の水を排除することが可能である。これらのことから、注入管２、もしくはグラウトホース７から重複区間へ流入するときにグラウト材６に付与される注入圧力により、水より比重の大きいグラウト材６は重複区間の水を鋼管杭５の天端から排除しながら、シール材３上から上方へ向けて充填されていこうとする。   In addition, since the upper end surface of the steel pipe pile 5 is located on the water, it enters into the overlapping section, and the upper surface of the water that is filled is in the atmosphere and receives an atmospheric pressure of 1 atm. 1 + 0.1 / per 1 m water depth))). For this reason, for example, as in Japanese Patent Application Laid-Open No. 2005-16006, it is possible to exclude water in the overlapping section with a pressure smaller than the pressure required to drain the water existing in the closed space under water (paragraph 0051, FIG. 8). It is. From these facts, the grout material 6 having a specific gravity larger than that of the water of the steel pipe pile 5 is caused by the injection pressure applied to the grout material 6 when flowing into the overlapping section from the injection pipe 2 or the grout hose 7. It is going to be filled up from the top of the sealing material 3 while excluding from the top end.

このように請求項４、５ではグラウト材の濃度が重複区間へ流入する際に維持されることと、流入先の水を排除することに要する圧力が水中での場合より小さいことで、重複区間に注入管２から入り込むグラウト材６が重複区間に存在する水と混合されることによる希釈化が生じにくいため、グラウト材６は製造時の濃度を維持したまま、重複区間に流入し、上向きに充填されていこうとする。   Thus, in claims 4 and 5, the concentration of the grout material is maintained when it flows into the overlapping section, and the pressure required to eliminate the inflow destination water is smaller than that in the case of the overlapping section. Since the grout material 6 entering from the injection pipe 2 is less likely to be diluted by mixing with water existing in the overlapping section, the grout material 6 flows into the overlapping section while maintaining the concentration at the time of manufacture, and upwards Try to be filled.

請求項４、５では注入管２からの、またはグラウトホース７からの重複区間へのグラウト材６の流入に伴い、重複区間に元々、入り込んでいた水や重複区間への充填初期に希釈化されたグラウト材６を鋼管杭５の上端から鋼管杭５の内部へ排出していくことが可能であるため、最終的には注入管２から流入するグラウト材６のみを重複区間に充填させることが可能になる。   In claims 4 and 5, with the inflow of the grout material 6 from the injection pipe 2 or into the overlapping section from the grout hose 7, water is originally diluted into the overlapping section and diluted at the initial stage of filling into the overlapping section. Since it is possible to discharge the grout material 6 from the upper end of the steel pipe pile 5 to the inside of the steel pipe pile 5, it is finally possible to fill only the grout material 6 flowing from the injection pipe 2 into the overlapping section. It becomes possible.

以上のように重複区間内に水が入り込んでいても、注入管２やグラウトホース７から重複区間に流入するグラウト材６は製造時の濃度、あるいは粘度を維持することが可能であるため、グラウト材６中を勢いよく圧縮された空気泡が上昇することと、流入（注入）速度が上がることがなければ、水との混合による希釈化は回避されると考えられる。但し、流入速度の変化等に起因し、希釈化を完全に防止できるとは言い切れない可能性もある。   As described above, the grout material 6 flowing into the overlapping section from the injection tube 2 or the grout hose 7 can maintain the concentration or viscosity at the time of manufacture even if water enters the overlapping section. If the air bubbles compressed vigorously in the material 6 do not rise and the inflow (injection) speed does not rise, dilution by mixing with water is considered to be avoided. However, there is a possibility that dilution cannot be completely prevented due to a change in the inflow velocity.

そこで、注入管２内のグラウト材６の重複区間内への流入に先立ち、重複区間に存在する水を予め排出しておくこと（請求項６）は、注入口１ａ（接続管２１）に注入管２が接続されるか、グラウトホース７が接続されるかを問わず、また重複区間に水が存在するか否かに拘わらず、製造時のグラウト材６の濃度を確実に維持したまま、重複区間内にグラウト材６を充填させる上では有効である。   Therefore, prior to the inflow of the grout material 6 in the injection pipe 2 into the overlapping section, the water existing in the overlapping section is discharged in advance (Claim 6) is injected into the injection port 1a (connection pipe 21). Regardless of whether the pipe 2 is connected or the grout hose 7 is connected, and whether water is present in the overlapping section, the concentration of the grout material 6 at the time of manufacture is reliably maintained, This is effective in filling the grout material 6 in the overlapping section.

重複区間に存在する水は図２−（ａ）に示すように脚部１の水上に突出した部分と鋼管杭５との間から重複区間に挿入した排水ホース９を通じて排出される場合と、図１−（ａ）に示すように注入管２内に挿入した排水ホース９を通じて排出される場合がある。後者の場合、注入口１ａに接続されている脚部側弁１ｂとグラウトホース７の先端部に接続されているホース側弁７ａが開放させられ、重複区間内と注入管２内が連通させられる。排水ホース９の上端部には排水（真空）ポンプが接続される。グラウトホース７の先端部はグラウト材６が吐出する側の端部を指す。図２−（ａ）は前記のようにシール材３が装着側の反対側に密着した状態の安全性を高めるために、シール材３上に注入口１ａから予備グラウト材６１を充填し、その硬化後、予備グラウト材６１上に排水ホース９の先端を到達させた状況を示している。   As shown in FIG. 2- (a), the water existing in the overlapping section is discharged through the drainage hose 9 inserted in the overlapping section from between the portion of the leg 1 protruding above the water and the steel pipe pile 5, and As shown to 1- (a), it may be discharged | emitted through the drainage hose 9 inserted in the injection pipe 2. FIG. In the latter case, the leg-side valve 1b connected to the inlet 1a and the hose-side valve 7a connected to the tip of the grout hose 7 are opened, and the inside of the overlapping section and the inside of the injection pipe 2 are communicated. . A drainage (vacuum) pump is connected to the upper end of the drainage hose 9. The front end portion of the grout hose 7 indicates an end portion on the side from which the grout material 6 is discharged. In FIG. 2A, in order to improve the safety in the state where the sealing material 3 is in close contact with the mounting side as described above, the preliminary grout material 61 is filled on the sealing material 3 from the inlet 1a. The state where the tip of the drainage hose 9 is made to reach the preliminary grout material 61 after curing is shown.

いずれの方法による場合にも、請求項６では重複区間内（脚部１と鋼管杭５との間）へのグラウト材６の充填に先立ち、重複区間内に存在する水が排出されることで、グラウト材６の充填空間である重複区間から完全に、またはそれに近い状態にまで水を排除することができる。   In any case, according to claim 6, water existing in the overlapping section is discharged prior to filling the grout material 6 in the overlapping section (between the leg 1 and the steel pipe pile 5). The water can be completely removed from the overlapping section which is the filling space of the grout material 6 to a state close to it.

この結果、グラウト材６の最終的な充填空間である重複区間内に水が残留することに起因する水とグラウト材６との混合による希釈化が完全に、またはほぼ完全に回避される。併せてグラウト材６の注入時に特開２００５−１６００６号公報のようにグラウト材６が充填空間内の水を押し出すだけの高い圧力を持つ必要がないため、グラウト材６の供給側ではグラウト材６がグラウトホース７から吐出する程度の圧力がグラウト材６に付与されればよくなる。   As a result, dilution due to the mixing of the water and the grout material 6 due to the water remaining in the overlapping section which is the final filling space of the grout material 6 is completely or almost completely avoided. At the same time, it is not necessary for the grout material 6 to have a high pressure to push out the water in the filling space as in Japanese Patent Application Laid-Open No. 2005-16006 when the grout material 6 is injected. However, it is sufficient if the pressure that is discharged from the grout hose 7 is applied to the grout material 6.

請求項６では脚部側弁１ｂの開放前に重複区間から水が抜かれていることで、前記のように重複区間に水が存在している場合のようにグラウト材６が水と混合することによる希釈化が完全に、またはほぼ完全に防止されるため、製造時の高い濃度を維持したグラウト材６を重複区間に充填することの確実性が向上する。   In claim 6, the water is removed from the overlapping section before the leg-side valve 1b is opened, so that the grout material 6 is mixed with water as in the case where water is present in the overlapping section as described above. Therefore, the reliability of filling the overlapping section with the grout material 6 maintaining a high concentration at the time of manufacture is improved.

また前記のように重複区間に水が存在している場合には、グラウト材６の注入時には鋼管杭５の天端から水を押し上げるための大気圧に勝る圧力を必要とすることも想定されるが、重複区間に水がないことで、大気圧に勝る圧力でのグラウト材６の注入を必要としない。   Further, when water is present in the overlapping section as described above, it is assumed that a pressure higher than the atmospheric pressure for pushing up the water from the top of the steel pipe pile 5 is required when the grout material 6 is injected. However, since there is no water in the overlapping section, it is not necessary to inject the grout material 6 at a pressure exceeding the atmospheric pressure.

注入管２、もしくはグラウトホース７が接続される注入口１ａは脚部１の周方向に１箇所しか形成（配置）されないこともあるが、注入管２やグラウトホース７はグラウト材６の重複区間への充填に使用されることから、グラウト材６の重複区間への充填効率を高める上では、注入口１ａは図５に示すように脚部１の周方向に分散して複数個、形成され、各注入口１ａに注入管２やグラウトホース７が接続されることが合理的である（請求項８）。「周方向に分散して」とは、例えば「周方向に均等に」の意味であるが、必ずしも均等である必要はない。   The injection pipe 1 or the injection port 1a to which the grout hose 7 is connected may be formed (arranged) only in one place in the circumferential direction of the leg 1, but the injection pipe 2 and the grout hose 7 are overlapping sections of the grout material 6. In order to increase the efficiency of filling the grout material 6 into the overlapping section, a plurality of injection ports 1a are formed in a distributed manner in the circumferential direction of the leg 1 as shown in FIG. It is reasonable to connect the injection tube 2 and the grout hose 7 to each injection port 1a (claim 8). “Distributed in the circumferential direction” means, for example, “equally in the circumferential direction”, but is not necessarily equal.

この場合に、注入管２内の水を排出する場合（請求項４）には、各注入管２に排水ホース９が挿入され、グラウト材６の充填時には各注入管２にグラウトホース７が接続され（請求項３）、全注入管２から同時にグラウトホース７を通じてグラウト材６の注入が行われることで（請求項８）、注入管２を経由した重複区間へのグラウト材６の注入効率の向上が図られる。この場合にも重複区間内の水を注入管２内に挿入した排水ホース９を通じて排出する場合には、複数本の注入管２に排水ホース９が挿入され、複数本の排水ホース９を通じて注入管２の内部に存在する水を排出することができるため、排水効率の向上も図られる。   In this case, when water in the injection pipe 2 is discharged (Claim 4), a drain hose 9 is inserted into each injection pipe 2, and a grout hose 7 is connected to each injection pipe 2 when the grout material 6 is filled. (Claim 3), by injecting the grout material 6 from all the injection pipes 2 through the grout hose 7 simultaneously (Claim 8), the injection efficiency of the grout material 6 into the overlapping section via the injection pipe 2 is improved. Improvement is achieved. Also in this case, when the water in the overlapping section is discharged through the drain hose 9 inserted into the injection pipe 2, the drain hose 9 is inserted into the plurality of injection pipes 2, and the injection pipe is passed through the plurality of drain hoses 9. Since the water which exists in 2 can be discharged | emitted, drainage efficiency is also improved.

請求項８ではグラウトホース７は全注入管２に注入管２単位で接続されるが、グラウト材６の供給側では全グラウトホース７が独立（分離）している場合と、１本に合流させられ、１本化されている場合がある。後者の場合、グラウトホース７は各注入管２の手前で注入管２毎に分岐する。   In claim 8, the grout hose 7 is connected to the whole injection pipe 2 in units of two injection pipes. However, on the supply side of the grout material 6, all the grout hoses 7 are independent (separated) and joined together. In some cases, it is integrated into one. In the latter case, the grout hose 7 branches for each injection tube 2 before each injection tube 2.

請求項８ではまた、注入管２内には前記のように波浪等の影響で水が入り込む可能性があるが、脚部１の周方向に複数本の注入管２が接続された場合に、全注入管２内に水が入り込んでいないこともあるため、全注入管２での排水作業が必要になるとは限らない。   In claim 8, water may enter into the injection pipe 2 due to the influence of waves or the like as described above, but when a plurality of injection pipes 2 are connected in the circumferential direction of the leg 1, Since water may not enter all the injection pipes 2, it is not always necessary to perform drainage work in all the injection pipes 2.

本発明ではグラウトホース７の先端までポンプによる圧送が可能な流動性をグラウト材６の使用が適し、具体的には材齢２８日における圧縮強度が１００Ｎ／ｍｍ２を超えていることが望ましい。圧縮強度が１００Ｎ／ｍｍ２以下の場合には、脚部１の直径が３〜４ｍ程度以上、且つ水上構造物の高さが５０ｍ程度を超えるような大型構造物を構築する場合、台風などの強風により一体性が保たれなくなる場合がある。 In the present invention, the use of the grout material 6 is suitable for the fluidity capable of being pumped to the tip of the grout hose 7, and specifically, the compressive strength at the age of 28 days is preferably over 100 N / mm 2 . When the compressive strength is 100 N / mm 2 or less, when constructing a large structure in which the diameter of the leg 1 is about 3 to 4 m or more and the height of the water structure exceeds about 50 m, a typhoon or the like The integrity may not be maintained due to strong winds.

脚部に形成された注入口とこれに直接、もしくは間接的に接続されるグラウトホースにそれぞれ脚部側弁とホース側弁を接続し、グラウトホース内にグラウト材を充填してホース側弁を閉鎖させ、脚部側弁を閉鎖させてグラウトホースの先端部を注入口に直接、もしくは間接的に接続した後、脚部側弁とホース側弁を開放させてグラウトホース内のグラウト材を重複区間に直接、もしくは間接的に流入させるため、注入口直前で重複区間への流入を待つグラウト材がグラウトホース内、または注入管内での濃度、あるいは粘度の低下を招くことなく、密実に充填された状態にすることができる。この結果、重複区間内に充填されるグラウト材中に水等の液体や空気が混入する可能性が低下するため、水等の液体や空気の混入による重複区間への充填時のグラウト材の品質低下を回避することができる。   Connect the leg side valve and the hose side valve to the inlet formed in the leg part and the grout hose connected directly or indirectly to this, respectively, and fill the grout hose with the grout material to Close and close the leg side valve and connect the tip of the grout hose directly or indirectly to the inlet, then open the leg side valve and the hose side valve to overlap the grout material in the grout hose In order to flow directly or indirectly into the section, the grout material waiting to flow into the overlapping section immediately before the inlet is filled densely without causing a decrease in concentration or viscosity in the grout hose or in the injection pipe. It can be in the state. As a result, the possibility of liquid or air such as water entering the grout material filled in the overlapping section decreases, so the quality of the grout material when filling the overlapping section due to the mixing of liquid or air such as water A decrease can be avoided.

請求項４では注入口に接続され、上端部が水上より上に突出した注入管の上端部を通じ、注入管の内部に存在する水を排出した後、注入管にグラウトホースを接続し、注入管へのグラウト材の注入を開始するため、注入口に注入管を接続する場合に、グラウト材が水と混合することによる希釈化の可能性を低下させることができ、注入管内に充填されたグラウト材の製造時の濃度、あるいは粘度を維持することが可能になる。   In claim 4, after the water existing in the injection pipe is discharged through the upper end of the injection pipe which is connected to the injection port and whose upper end protrudes above the water, a grout hose is connected to the injection pipe. When the injection tube is connected to the inlet to start injecting the grout material into the injection port, the possibility of dilution by mixing the grout material with water can be reduced, and the grout filled in the injection tube can be reduced. It is possible to maintain the concentration or viscosity at the time of manufacturing the material.

この結果、注入管から重複区間にグラウト材を流入させるときに、水より比重の大きい状態にある濃度の高いグラウト材を水の下に回り込ませ、重複区間には下方側から留まるように重複区間の水を鋼管杭の天端から排除しながら、シール材上から上方へ向けて充填することができる。   As a result, when the grouting material is allowed to flow from the injection pipe into the overlapping section, the grouting material having a higher concentration than the water is circulated under the water, and the overlapping section remains in the overlapping section from below. The water can be filled upward from above the sealing material while removing the water from the top end of the steel pipe pile.

（ａ）〜（ｆ）は脚部の注入口に注入管を接続し、注入管から重複区間にグラウト材を充填する場合の、注入管内の水の排出から、注入管を通じての重複区間内へのグラウト材の充填までの作業手順を示した概要図である。(A)-(f) connect an injection tube to the injection port of the leg, and when filling the grout material from the injection tube into the overlapping section, from the discharge of water in the injection tube into the overlapping section through the injection tube It is the schematic which showed the operation | work procedure until filling of grout material of. （ａ）は重複区間内の水を重複区間内に挿入される排水ホースを通じて排出する場合の作業要領を示した縦断面図、（ｂ）は重複区間内の水の排出に先立ち、重複区間のシール材上に予備グラウト材を充填して硬化させる場合の作業要領を示した縦断面図である。(A) is a longitudinal sectional view showing a work procedure when draining the water in the overlapping section through the drainage hose inserted in the overlapping section, (b) is a drawing of the overlapping section prior to discharging the water in the overlapping section. It is the longitudinal cross-sectional view which showed the operation | work point in the case of making a preliminary | backup grout material on a sealing material, and making it harden | cure. （ａ）はグラウトホースを水で洗浄している様子を示した縦断面図、（ｂ）はグラウト材に先行する仕切り材をグラウト材の注入時の圧力で洗浄後のグラウトホース内に残留する水等の液体をグラウトホースの吐出口へ押し出している様子を示した縦断面図、（ｃ）は仕切り材が吐出口から放出された様子を示した縦断面図、（ｄ）はグラウトホース内にグラウト材が充填しきった様子を示した縦断面図である。(A) is a longitudinal cross-sectional view showing a state where the grout hose is washed with water, and (b) shows that the partition material preceding the grout material remains in the grout hose after washing with the pressure at the time of pouring the grout material. A longitudinal sectional view showing a state in which liquid such as water is pushed out to the outlet of the grout hose, (c) is a longitudinal sectional view showing a state in which the partition material is discharged from the outlet, and (d) is the inside of the grout hose. It is the longitudinal cross-sectional view which showed a mode that the grout material was fully filled in. （ａ）〜（ｆ）は脚部の注入口にグラウトホースを接続し、グラウトホースから直接、重複区間にグラウト材を充填する場合の、注入口（接続管）へのグラウトホースの接続から、充填終了後のグラウトホースの離脱までの作業手順を示した概要図である。(A) to (f) connect the grout hose to the injection port of the leg, and from the connection of the grout hose to the injection port (connection pipe) when filling the grout material directly from the grout hose, It is the schematic which showed the operation | work procedure until the detachment of the grout hose after completion | finish of filling. 脚部に周方向に間隔を置いて形成された複数個の注入口に注入管を接続し、各注入管内の水を排出したときの様子を示した立面図である。It is the elevation which showed a mode when an injection pipe was connected to a plurality of injection holes formed in the leg part at intervals in the peripheral direction, and water in each injection pipe was discharged. 図５に示す複数本の注入管にグラウトホースを接続し、全注入管内にグラウト材を注入しているときの様子を示した立面図である。FIG. 6 is an elevational view showing a state when a grout hose is connected to a plurality of injection pipes shown in FIG. 5 and a grout material is injected into all the injection pipes. 注入管の脚部側弁を開放させ、注入管内に充填されたグラウト材を重複区間内に流入させるときの様子を示した立面図である。It is the elevation which showed a mode when the leg part side valve of an injection tube was opened and the grout material with which it filled in the injection tube was made to flow in in an overlap area.

図１−（ａ）〜（ｆ）は水上構造物を支持する中空断面形状の脚部１を、水底地盤に支持され、脚部１の内径より小さい外径の鋼管杭５の上方寄りの区間の周囲に配置し、脚部１に形成された注入口１ａに直接、もしくは間接的に水上からグラウトホース７を接続し、グラウトホース７を通じて脚部１と鋼管杭５との間の間の重複区間にグラウト材６を充填する方法の手順例を示す。   1-(a)-(f) is a section closer to the upper side of a steel pipe pile 5 having an outer diameter smaller than the inner diameter of the leg 1, which is supported by the bottom of the ground and has a hollow cross-sectional leg 1 that supports the floating structure. The grout hose 7 is directly or indirectly connected to the inlet 1a formed in the leg 1 from the water and overlapped between the leg 1 and the steel pipe pile 5 through the grout hose 7. A procedure example of a method for filling the section with the grout material 6 will be shown.

図１は「注入口１ａに間接的にグラウトホース７を接続する」場合の例を示しており、注入口１ａとグラウトホース７との間に、グラウトホース７から放出されたグラウト材６を一旦、充填する注入管２を介在させた場合の例を示す。「注入口１ａに直接、グラウトホース７を接続する」とは、図４に示す例の場合を言う。   FIG. 1 shows an example in which “the grout hose 7 is indirectly connected to the inlet 1 a”, and the grout material 6 discharged from the grout hose 7 is temporarily placed between the inlet 1 a and the grout hose 7. An example in which an injection tube 2 to be filled is interposed is shown. “Connect the grout hose 7 directly to the inlet 1a” refers to the case of the example shown in FIG.

注入管２は図１−（ｂ）、図５に示すように先端部である下端部が脚部１の注入口１ａに接続されたときに、上端部が水上より上に突出し、この水上に突出した上端部にグラウトホース７が接続され、グラウトホース７から注入管２にグラウト材６が注入される。図１はまた、開放している上端から波浪等の影響により注入管２の内部に水（海水）が入り込んだ場合に備え、注入管２の内部に存在する水を排出した後、注入管２にグラウトホース７を接続し、注入管２へのグラウト材６の注入を開始する場合の手順例を示している。以下、図１に示す手順例の作業手順を説明する。   As shown in FIG. 1- (b) and FIG. 5, the injection tube 2 has its upper end protruding above the water when the lower end, which is the tip, is connected to the injection port 1a of the leg 1, and the The grout hose 7 is connected to the protruding upper end, and the grout material 6 is injected from the grout hose 7 into the injection tube 2. FIG. 1 also shows the case where water (seawater) enters the inside of the injection pipe 2 due to the influence of waves or the like from the open upper end, and after the water existing in the injection pipe 2 is discharged, the injection pipe 2 The example of a procedure in the case of connecting grout hose 7 to the start of injection of grout material 6 into injection tube 2 is shown. Hereinafter, the work procedure of the procedure example shown in FIG. 1 will be described.

図１の例では水上より突出した注入管２の上端部から図１−（ａ）に示すように注入管２の内部に存在する水を排水ホース９を用いて排出した後、（ｂ）に示すように注入管２にグラウトホース７を接続し、注入管２内へのグラウト材６の注入が開始される。注入管２内の水は排水ホース９の水上に位置する上端部に接続された図示しない排水（真空）ポンプにより排水ホース９を通じて外部へ排出される。脚部１の水上に露出する区間の外周には作業台１０が固定されており、この作業台１０上で注入管２内の水の排出作業と注入管２内へのグラウト材６の注入作業が行われる。   In the example of FIG. 1, after draining the water which exists in the injection pipe 2 from the upper end part of the injection pipe 2 which protruded from the water using the drainage hose 9 as shown in FIG. As shown, a grout hose 7 is connected to the injection tube 2 and injection of the grout material 6 into the injection tube 2 is started. The water in the injection pipe 2 is discharged to the outside through the drainage hose 9 by a drainage (vacuum) pump (not shown) connected to the upper end of the drainage hose 9 located above the water. A work table 10 is fixed to the outer periphery of the leg 1 exposed on the water. On this work table 10, water is discharged from the injection pipe 2 and the grout material 6 is injected into the injection pipe 2. Is done.

脚部１の注入口１ａには重複区間内に入り込んでいる水の注入管２内への回り込みを防止するための開閉自在な脚部側弁１ｂが接続され、グラウトホース７の先端部にはグラウトホース７内に充填されたグラウト材６が注入管２への接続前に漏れ出すことを防止するための開閉自在なホース側弁７ａが接続されている。脚部側弁１ｂが接続される注入口１ａは後述する、注入口１ａに接続される接続管２１の注入管２側の接続口であることもある。以下、注入口１ａは接続管２１の注入管２側の接続口を含む。   An openable / closable leg-side valve 1b is connected to the inlet 1a of the leg 1 to prevent the water that has entered the overlapping section from entering the injection pipe 2, and the tip of the grout hose 7 is connected to the tip of the grout hose 7. An openable / closable hose-side valve 7a is connected to prevent the grout material 6 filled in the grout hose 7 from leaking before being connected to the injection pipe 2. The injection port 1a to which the leg side valve 1b is connected may be a connection port on the injection tube 2 side of the connection tube 21 connected to the injection port 1a, which will be described later. Hereinafter, the injection port 1 a includes a connection port on the injection tube 2 side of the connection tube 21.

ホース側弁７ａはグラウト材６がグラウトホース７内に充填された時点で閉鎖させられ、グラウトホース７の先端部は脚部側弁１ｂが閉鎖させられた状態で注入口１ａに直接、もしくは間接的に接続される。「直接、接続」とは、図４に示すように注入口１ａ（接続管２１の接続口）にグラウトホース７が接続される場合を言い、「間接的に接続」とは、図１に示すように注入口１ａ（接続管２１の接続口）に直接、接続された注入管２を介して注入口１ａにグラウトホース７が間接的に接続される場合を言う。   The hose side valve 7a is closed when the grout material 6 is filled in the grout hose 7, and the tip of the grout hose 7 is directly or indirectly connected to the inlet 1a with the leg side valve 1b closed. Connected. “Direct connection” refers to the case where the grout hose 7 is connected to the inlet 1a (connection port of the connection pipe 21) as shown in FIG. 4, and “indirect connection” refers to FIG. In this way, the grout hose 7 is indirectly connected to the injection port 1a directly through the injection tube 2 connected directly to the injection port 1a (connection port of the connection tube 21).

注入口１ａ（接続管２１の接続口）へのグラウトホース７の接続が直接か間接かを問わず、注入口１ａへのグラウトホース７の接続後、脚部側弁１ｂとホース側弁７ａが開放させられた状態でグラウトホース７にグラウト材６が供給される。前記のように注入管２の内部に水が入り込んでいる場合、グラウトホース７へのグラウト材６の供給に先立ち、注入管２の内部に存在する水が排出される。   Regardless of whether the grout hose 7 is directly or indirectly connected to the inlet 1a (connection port of the connecting pipe 21), the leg side valve 1b and the hose side valve 7a are connected after the grout hose 7 is connected to the inlet 1a. The grout material 6 is supplied to the grout hose 7 in the opened state. As described above, when water enters the inside of the injection tube 2, the water present in the injection tube 2 is discharged prior to the supply of the grout material 6 to the grout hose 7.

直接か間接かを問わず、注入口１ａへのグラウトホース７の接続の際には、基本的に図３−（ｄ）に示すようにグラウトホース７内にグラウト材６が充填されており、グラウトホース７内にグラウト材６が充填された状態でグラウトホース７が注入口１ａに接続される。その後、グラウトホース７内に充填されているグラウト材６が脚部１と鋼管杭５との間（重複区間）に流入させられる。注入口１ａに注入管２が接続される場合は、グラウトホース７内のグラウト材６は一旦、注入管２内に流入した後、重複区間内に流入させられる。   When connecting the grout hose 7 to the inlet 1a, whether directly or indirectly, the grout material 6 is basically filled in the grout hose 7 as shown in FIG. The grout hose 7 is connected to the inlet 1a with the grout hose 7 filled with the grout material 6. Thereafter, the grout material 6 filled in the grout hose 7 is caused to flow between the leg portion 1 and the steel pipe pile 5 (overlapping section). When the injection pipe 2 is connected to the injection port 1a, the grout material 6 in the grout hose 7 once flows into the injection pipe 2 and then into the overlapping section.

図１の場合、注入管２の下端部は脚部１の注入口１ａに直接、接続されることもあるが、図面では脚部側弁１ｂの接続のし易さ、あるいは脚部側弁１ｂの接続箇所の確保の関係で、注入口１ａに脚部１の外周面側から、注入口１ａと注入管２の下端部を繋ぐ接続管２１を接続し、この接続管２１の接続口に注入管２の下端部（先端部）を接続し、接続管２１の注入管２との接続部分寄りに脚部側弁１ｂを接続している。   In the case of FIG. 1, the lower end of the injection tube 2 may be directly connected to the injection port 1a of the leg 1, but in the drawing, the leg side valve 1b is easily connected or the leg side valve 1b. In order to secure the connection point, a connection pipe 21 connecting the injection port 1a and the lower end of the injection pipe 2 is connected to the injection port 1a from the outer peripheral surface side of the leg 1 and injection is made into the connection port of the connection pipe 21. The lower end portion (tip portion) of the pipe 2 is connected, and the leg side valve 1b is connected to the connection pipe 21 near the connection portion with the injection pipe 2.

図５〜図７は脚部１の周方向に分散させて形成した複数個の注入口１ａに注入管２を接続し、複数本の注入管２から同時にグラウト材６を注入する場合の作業要領を示す。図５は各注入管２内の水を排出した状況を、図６は各注入管２にグラウトホース７を接続し、全注入管２内にグラウト材６を注入している状況を示す。図７は注入管２内へのグラウト材６の充填が完了した後、注入管２の脚部側弁１ｂを開放させ、注入管２内のグラウト材６を重複区間内に流入させている状況を示す。   5 to 7 show work procedures when the injection pipe 2 is connected to a plurality of injection ports 1a formed by being distributed in the circumferential direction of the leg 1, and the grout material 6 is injected simultaneously from the plurality of injection pipes 2. Indicates. FIG. 5 shows a situation where water in each injection pipe 2 is discharged, and FIG. 6 shows a situation where a grout hose 7 is connected to each injection pipe 2 and the grout material 6 is injected into all the injection pipes 2. FIG. 7 shows a state in which, after the filling of the grout material 6 into the injection tube 2 is completed, the leg side valve 1b of the injection tube 2 is opened and the grout material 6 in the injection tube 2 flows into the overlapping section. Indicates.

グラウトホース７の、注入管２に接続される側の先端部にはグラウトホース７内に存在するグラウト材６の流出の阻止と解除を切り替えるホース側弁７ａが接続されているが、グラウトホース７内には少なからずグラウトホース７を洗浄した際の水等の液体が残留している。グラウトホース７内には水が残留した状態で、図３−（ｂ）に示すようにグラウトホース７の基端部側であるグラウト材６の供給側からグラウト材６が注入される。グラウト材６のグラウトホース７への供給に伴い、ホース側弁７ａが開放させられ、グラウト材６がグラウトホース７の先端部側へ送り込まれる。   A hose side valve 7a for switching between prevention and release of the outflow of the grout material 6 existing in the grout hose 7 is connected to the tip of the grout hose 7 on the side connected to the injection pipe 2. There is not a little liquid such as water when the grout hose 7 is washed. In the state where water remains in the grout hose 7, the grout material 6 is injected from the supply side of the grout material 6, which is the base end side of the grout hose 7, as shown in FIG. With the supply of the grout material 6 to the grout hose 7, the hose side valve 7 a is opened, and the grout material 6 is fed to the tip end side of the grout hose 7.

グラウト材６の供給に際し、グラウトホース７内にはグラウト材６の供給前に、残留している水とグラウト材６を仕切りながら、グラウト材６の圧送を利用してグラウトホース７内の水を確実に排出するスポンジの、もしくはスポンジ状の仕切り材８が挿入される。   When the grout material 6 is supplied, before the grout material 6 is supplied, the water remaining in the grout material 6 is partitioned from the remaining water and the grout material 6, and the water in the grout hose 7 is supplied using the pressure of the grout material 6. A sponge-like or sponge-like partition material 8 that is surely discharged is inserted.

仕切り材８はグラウト材６の先端部側への送り込みに伴い、図３−（ｃ）に示すようにグラウトホース７内に残留する水を押し出しながら先端部側へ移動するが、グラウト材６をグラウトホース７内で堰き止め、グラウト材６の注入圧力を高める働きをするため、仕切り材８のグラウトホース７からの放出時にはグラウトホース７内にグラウト材６が密実に充填される状態になる。仕切り材８がグラウトホース７から放出され、希釈されていない仕切り材８寄りのグラウト材６が排出された時点で、ホース側弁７ａは（ｄ）に示すように閉鎖させられる。   The partition member 8 moves to the tip end side while pushing out water remaining in the grout hose 7 as shown in FIG. 3- (c) as the grout member 6 is fed to the tip end side. In order to increase the injection pressure of the grouting material 6 by damming in the grouting hose 7, when the partition material 8 is released from the grouting hose 7, the grouting material 6 is filled with the grouting material 6 densely. When the partition material 8 is discharged from the grout hose 7 and the undiluted grout material 6 near the partition material 8 is discharged, the hose side valve 7a is closed as shown in FIG.

グラウトホース７の先端部までグラウト材６が充填された状態で、図３−（ｄ）に示すようにグラウトホース７の先端部が注入管２の上端部等に接続される。このとき、ホース側弁７ａは閉鎖したままの状態にある。グラウトホース７の注入管２への接続後、ホース側弁７ａが開放させられ、グラウトホース７のグラウト材供給側からのグラウト材６の供給が継続されることで、グラウトホース７内のグラウト材６が注入管２内に降下し、流入していく。   In a state where the grout material 6 is filled up to the tip of the grout hose 7, the tip of the grout hose 7 is connected to the upper end of the injection tube 2 and the like as shown in FIG. At this time, the hose side valve 7a remains closed. After the connection of the grout hose 7 to the injection pipe 2, the hose side valve 7a is opened, and the supply of the grout material 6 from the grout material supply side of the grout hose 7 is continued, so that the grout material in the grout hose 7 is maintained. 6 descends into the injection tube 2 and flows in.

注入管２の先端が接続される脚部１の注入口１ａには重複区間内に存在する場合の水の注入管２内への流入を阻止し、また注入管２内にグラウトホース７からグラウト材６が充填されるまでの間、グラウト材６の重複区間への流入を阻止するための脚部側弁１ｂが接続されている。図１では前記のように脚部１の注入口１ａに注入管２側から、脚部側弁１ｂが接続された接続管２１を接続し、接続管２１の接続口に注入管２を接続しているが、注入管２の脚部１側の先端部を直接、注入口１ａに接続し、この注入口１ａとの接続部分のグラウトホース７寄りの部分に脚部側弁１ｂを接続し、接続管２１を使用しないこともある。   The inlet 1a of the leg 1 to which the tip of the injection pipe 2 is connected prevents water from flowing into the injection pipe 2 when it exists in the overlapping section, and also enters the injection pipe 2 from the grout hose 7 to the grout. Until the material 6 is filled, the leg side valve 1b for preventing the grout material 6 from flowing into the overlapping section is connected. In FIG. 1, the connecting pipe 21 connected to the leg-side valve 1 b is connected to the inlet 1 a of the leg 1 from the inlet pipe 2 side as described above, and the inlet pipe 2 is connected to the connecting port of the connecting pipe 21. However, the tip of the injection tube 2 on the leg 1 side is directly connected to the injection port 1a, and the leg side valve 1b is connected to the portion near the grout hose 7 of the connection portion with the injection port 1a, The connecting pipe 21 may not be used.

図１の場合、脚部側弁１ｂは（ａ）に示すように注入管２内にグラウトホース７からグラウト材６を充填させきるまで閉鎖状態に保たれ、（ｂ）に示すようにグラウトホース７を通じたグラウト材６の注入管２への注入は注入管２内に、その上端部までグラウト材６が充填しきる程度まで継続される。グラウトホース７からの注入管２内へのグラウト材６の充填時には脚部側弁１ｂが閉鎖されているため、注入口１ａ側には空気の抜け道がないが、注入管２の上端部等に形成された空気抜き孔等から注入管２内に空気が抜けていくことで、注入管２内にグラウト材６が流入する。   In the case of FIG. 1, the leg side valve 1b is kept closed until the grout hose 7 is completely filled with the grout material 6 into the injection tube 2 as shown in FIG. 1A, and the grout hose as shown in FIG. The injection of the grout material 6 into the injection tube 2 through 7 is continued to the extent that the grout material 6 is completely filled in the injection tube 2 up to its upper end. Since the leg side valve 1b is closed when the grout material 6 is filled into the injection pipe 2 from the grout hose 7, there is no air passage on the injection port 1a side. The grout material 6 flows into the injection pipe 2 as air escapes into the injection pipe 2 from the formed air vent hole or the like.

注入管２内にグラウト材６を充填させることは、その後にグラウト材６が流入する重複区間内に充填され、上昇したグラウト材６が鋼管杭５の天端から横溢（オーバーフロー）するまでグラウト材６を注入管２内に供給することと、重複区間内に充填されたグラウト材６中に圧縮された空気が解放されることによってグラウト材６が水と撹拌することを回避する意味がある。グラウト材６を鋼管杭５の天端から横溢させることは、重複区間内に先行して充填されたグラウト材６が重複区間内に水が存在する場合の水との接触や混合により希釈化していることがあり得るために、その先行充填分を重複区間から排除する意味がある。   Filling the injection pipe 2 with the grouting material 6 means that the grouting material 6 is filled in the overlapping section where the grouting material 6 flows thereafter, and the raised grouting material 6 overflows from the top of the steel pipe pile 5 (overflow). It is meaningful to supply 6 into the injection pipe 2 and to avoid that the grout material 6 is stirred with water by releasing the compressed air in the grout material 6 filled in the overlapping section. Overflowing the grout material 6 from the top end of the steel pipe pile 5 is caused by diluting the grout material 6 previously filled in the overlapping section by contact with water or mixing when water is present in the overlapping section. Therefore, it is meaningful to exclude the preceding filling from the overlapping section.

なお、図示するように注入管２の上端部のレベルが鋼管杭５の天端のレベルより上に位置する（高い）場合には、注入管２内に充填されているグラウト材６の上面に加わる圧力（大気圧）が鋼管杭５の天端に位置するグラウト材６の上面に加わる圧力より高いため、この圧力差を利用して注入管２内のグラウト材６を重複区間内に流入し易い状態になっている。只、グラウト材６の流入時にはグラウト材６と注入管２内周面との間、鋼管杭５外周面及び脚部１内周面等との間の粘着力（粘性）に起因する抵抗による流入速度の低下は生じ得る。注入管２の上端部のレベルが鋼管杭５の天端のレベルより上に位置しない場合、またはレベル差が大きくない場合には、グラウトホース７からの圧送側の圧力を高くすることで、重複区間へのグラウト材６の流入が補われる。   In addition, when the level of the upper end part of the injection pipe 2 is located higher than the level of the top end of the steel pipe pile 5 as shown in the figure, the upper surface of the grout material 6 filled in the injection pipe 2 is formed. Since the applied pressure (atmospheric pressure) is higher than the pressure applied to the upper surface of the grout material 6 located at the top of the steel pipe pile 5, the grout material 6 in the injection pipe 2 flows into the overlapping section using this pressure difference. Easy to use. At the time of inflow of the grout material 6, the inflow due to the resistance caused by the adhesive force (viscosity) between the grout material 6 and the inner peripheral surface of the injection pipe 2, the outer peripheral surface of the steel pipe pile 5, the inner peripheral surface of the leg 1, etc. A reduction in speed can occur. If the level of the upper end of the injection pipe 2 is not located above the level of the top end of the steel pipe pile 5, or if the level difference is not large, the pressure on the pumping side from the grout hose 7 is increased to increase the overlap. Inflow of the grout material 6 into the section is compensated.

鋼管杭５に対する脚部１の鉛直方向の位置は、図１−（ｂ）、（ｅ）に示すように水底地盤に支持されている鋼管杭５上から降下させられる脚部１の内周面の、鋼管杭５の天端のレベルに対応した位置に鋼管杭５側へ突設されたブラケット４が鋼管杭５の天端（上端）上に載置され、下向きに係止することにより決まる。ブラケット４は例えば脚部１の内周面の周方向に複数箇所、均等に突設される。   The position of the leg 1 in the vertical direction with respect to the steel pipe pile 5 is the inner peripheral surface of the leg 1 that is lowered from above the steel pipe pile 5 supported by the water bottom ground as shown in FIGS. 1- (b) and (e). The bracket 4 projecting toward the steel pipe pile 5 at a position corresponding to the level of the top end of the steel pipe pile 5 is placed on the top end (upper end) of the steel pipe pile 5 and is determined by locking downward. . For example, the brackets 4 are projected evenly at a plurality of locations in the circumferential direction of the inner peripheral surface of the leg 1.

ブラケット４は鋼管杭５の天端の肉厚の範囲に載置されればよいが、図面では鋼管杭５の半径方向の脚部１の設置誤差に対応するためと、ブラケット４が載置された状態での脚部１の安定性を増すために、鋼管杭５の天端に内周側へ張り出すフランジ５ａを形成し、このフランジ５ａ上にブラケット４を載置している。   Although the bracket 4 should just be mounted in the thickness range of the top end of the steel pipe pile 5, in order to cope with the installation error of the leg part 1 of the radial direction of the steel pipe pile 5, the bracket 4 is mounted. In order to increase the stability of the leg portion 1 in the state of being bent, a flange 5a is formed at the top end of the steel pipe pile 5 so as to project to the inner peripheral side, and the bracket 4 is placed on the flange 5a.

ブラケット４は図１−（ｅ）に示すように鋼管杭５の天端に、または天端とフランジ５ａに載置される載置部４ａを有し、この載置部４ａの、鋼管杭５外周面と脚部１内周面との間の空間に面する箇所に、鋼管杭５外周面と脚部１内周面との間に充填されるグラウト材６を横溢（流出）させるための流出孔４ｂが形成される。   The bracket 4 has the mounting part 4a mounted in the top end of the steel pipe pile 5, as shown in FIG.1- (e), or the top end and the flange 5a, and the steel pipe pile 5 of this mounting part 4a. For overflowing (outflowing) the grout material 6 filled between the outer peripheral surface of the steel pipe pile 5 and the inner peripheral surface of the leg 1 at a location facing the space between the outer peripheral surface and the inner peripheral surface of the leg 1. Outflow hole 4b is formed.

図１−（ｂ）、（ｃ）に示すようにグラウト材６が注入管２の上端部にまで充填されたところで、（ｄ）に示すように脚部側弁１ｂが開放させられ、注入管２内のグラウト材６が重複区間に流入させられる。この脚部側弁１ｂの開放は遠隔や一時的に潜水する潜水士によって操作される。   1- (b) and (c), when the grout material 6 is filled up to the upper end of the injection tube 2, the leg side valve 1b is opened as shown in FIG. The grout material 6 in 2 is made to flow into an overlap area. The opening of the leg side valve 1b is operated remotely or by a diver who temporarily dives.

グラウト材６の重複区間への流入開始時には重複区間内に水が入り込んでいることもあるが、注入管２内に充填されたグラウト材６はグラウトホース７内に充填されたとき（製造時）の密度（濃度）を維持しているため、重複区間内の水より比重の大きいグラウト材６は注入口１ａからシール材３上に落下（流下）し、重複区間の下方から次第に充填されていくことになる。   At the start of the inflow of the grout material 6 into the overlapping section, water may have entered the overlapping section, but when the grout material 6 filled in the injection pipe 2 is filled in the grout hose 7 (during manufacture) Therefore, the grout material 6 having a specific gravity greater than that of the water in the overlapping section falls (flows down) onto the sealing material 3 from the inlet 1a and is gradually filled from below the overlapping section. It will be.

重複区間内に存在している水は図２−（ａ）に示すように注入管２からのグラウト材６の流入前に予め排除されることもある。この場合、脚部１を鋼管杭５の周囲に配置した後の波浪等の影響による脚部１の鋼管杭５に対する相対変形を防止すると同時に、重複区間内の水を排除する場合にシール材３の下方から作用する水圧に対する変形を防止するために、図２−（ｂ）に示すように注入管２内の一部のグラウト材６、または注入口１ａにグラウトホース７が直接、接続される場合のグラウトホース７内の一部のグラウト材６が予備グラウト材６１として重複区間（脚部１と鋼管杭５との間）のシール材３上に先行して充填され、硬化させられることもある。   The water existing in the overlapping section may be removed in advance before the grout material 6 flows from the injection pipe 2 as shown in FIG. In this case, the sealing material 3 is used to prevent relative deformation of the leg 1 with respect to the steel pipe pile 5 due to the influence of waves after the leg 1 is arranged around the steel pipe pile 5 and at the same time to eliminate water in the overlapping section. In order to prevent deformation due to water pressure acting from below, a grout hose 7 is directly connected to a part of the grout material 6 in the injection pipe 2 or the injection port 1a as shown in FIG. In some cases, a part of the grout material 6 in the grout hose 7 is filled as a preliminary grout material 61 on the sealing material 3 in the overlapping section (between the leg 1 and the steel pipe pile 5) and cured. is there.

シール材３上に予備グラウト材６１が充填される場合、グラウト材６の継続した充填前に硬化した予備グラウト材６１がシール材３の変形を拘束するため、鋼管杭５の外周に配置された状態にある脚部１の鋼管杭５に対する相対変形が抑制、または防止される。この場合、予備グラウト材６１が注入口１ａから重複区間に流入する時点でシール材３上に存在している水は予備グラウト材６１に押し上げられ、硬化した予備グラウト材６１上に存在している。このため、重複区間内の水を排除する場合には、重複区間へのグラウト材６の連続（継続）した本充填に先立ち、重複区間内に水上から排水ホース９が挿入され、排水ホース９の上端部に接続される排水ポンプによりシール材３上の重複区間内に存在する水が排出される。排水ホース９は先端が硬化した予備グラウト材６１に到達するまで挿入される。   When the preliminary grout material 61 is filled on the sealing material 3, the preliminary grout material 61 hardened before the continuous filling of the grout material 6 is arranged on the outer periphery of the steel pipe pile 5 in order to restrain deformation of the sealing material 3. The relative deformation of the leg 1 in the state with respect to the steel pipe pile 5 is suppressed or prevented. In this case, when the preliminary grout material 61 flows into the overlapping section from the inlet 1a, the water present on the sealing material 3 is pushed up by the preliminary grout material 61 and exists on the hardened preliminary grout material 61. . For this reason, when the water in the overlapping section is excluded, the drain hose 9 is inserted into the overlapping section from the water prior to the continuous (continuous) main filling of the grout material 6 to the overlapping section. The water present in the overlapping section on the sealing material 3 is discharged by the drainage pump connected to the upper end. The drainage hose 9 is inserted until it reaches the preliminary grout material 61 whose tip is hardened.

グラウト材６の重複区間内への流入時には注入管２内のグラウト材６の比重が重複区間内の水より大きいことで、グラウト材６は脚部側弁１ｂの開放時に自重と小さなポンプ圧力で重複区間に流入し、上方へ向けて充填されていく。グラウト材６の注入口１ａからの流入開始時にはグラウト材６は図１−（ｄ）に示すように自重で落下、あるいは流下するが、注入管２から重複区間へ流入するグラウト材６が注入口１ａから落下しなくなるまで重複区間に充填されたとき以降は、注入口１ａから流入したグラウト材６は先行して流入しているグラウト材６を押し上げていく。   When the grout material 6 flows into the overlapping section, the specific gravity of the grout material 6 in the injection pipe 2 is larger than the water in the overlapping section, so that the grout material 6 has its own weight and a small pump pressure when the leg valve 1b is opened. It flows into the overlapping section and fills upward. At the start of inflow of the grout material 6 from the injection port 1a, the grout material 6 falls or flows down by its own weight as shown in FIG. 1- (d), but the grout material 6 flowing into the overlapping section from the injection tube 2 is injected into the injection port. After the overlapping section is filled until it no longer falls from 1a, the grout material 6 flowing in from the inlet 1a pushes up the grout material 6 flowing in advance.

注入管２の上端部までグラウト材６が充填された時点でグラウトホース７を通じての注入管２へのグラウト材６の充填を終了させた場合には、注入管２内のグラウト材６の重複区間への流入に伴い、次第に注入管２内のグラウト材６の量が減少し、いずれかの時点で注入管２内のグラウト材６が受ける大気圧を利用しての重複区間への流入が停止することになる。   When the filling of the grout material 6 into the injection tube 2 through the grout hose 7 is terminated when the grout material 6 is filled up to the upper end of the injection tube 2, the overlapping section of the grout material 6 in the injection tube 2 As the amount of grouting material 6 in the injection tube 2 gradually decreases, the inflow to the overlapping section using the atmospheric pressure received by the grouting material 6 in the injection tube 2 stops at any point in time. Will do.

そこで、注入管２内のグラウト材６が受ける大気圧を利用した注入管２内のグラウト材６の重複区間への流入を完了させる上では、図１−（ｅ）に示すように重複区間に流入したグラウト材６が鋼管杭５の天端から横溢するまで注入管２内へのグラウトホース７を通じたグラウト材６の注入作業は継続される。   Therefore, in order to complete the inflow of the grout material 6 in the injection pipe 2 into the overlapping section using the atmospheric pressure received by the grout material 6 in the injection pipe 2, as shown in FIG. The operation of injecting the grout material 6 through the grout hose 7 into the injection tube 2 is continued until the inflow grout material 6 overflows from the top end of the steel pipe pile 5.

注入管２の上端におけるグラウト材６の大気圧を利用せず、グラウト材６の供給側からグラウト材６に与えられる圧送時の圧力を利用して重複区間にグラウト材６を充填する場合にも、グラウト材６が鋼管杭５の天端から横溢するまで注入管２内へのグラウトホース７を通じたグラウト材６の注入作業は継続される。   Even when the atmospheric pressure of the grout material 6 at the upper end of the injection pipe 2 is not used, the grout material 6 is filled in the overlapping section by using the pressure at the time of feeding given to the grout material 6 from the supply side of the grout material 6. The operation of injecting the grout material 6 through the grout hose 7 into the injection tube 2 is continued until the grout material 6 overflows from the top end of the steel pipe pile 5.

重複区間に充填されたグラウト材６の先行充填分が図１−（ｅ）に示すように鋼管杭５の天端から希釈されていないグラウト材６が横溢したところで、重複区間へのグラウト材６の充填が完了したものと判断されるため、（ｆ）に示すように脚部側弁１ｂが閉鎖させられると共に、グラウトホース７先端部のホース側弁７ａも閉鎖させられ、注入管２の上端部に接続されているグラウトホース７が注入管２から切り離される。   As shown in FIG. 1- (e), when the unfilled grout material 6 overflows from the top end of the steel pipe pile 5 as shown in FIG. 1- (e), the grout material 6 into the overlapping section is filled with the preceding filling of the grout material 6 filled in the overlapping section. Therefore, the leg side valve 1b is closed and the hose side valve 7a at the tip of the grout hose 7 is also closed as shown in FIG. The grout hose 7 connected to the section is disconnected from the injection tube 2.

図４は脚部１の注入口１ａに、グラウト材６が充填されたグラウトホース７を接続し、グラウトホース７から脚部１と鋼管杭５との間（重複区間）にグラウト材６を充填する場合の作業手順例を示す。ここに示す例においても注入口１ａに接続管２１を接続しているため、グラウトホース７の吐出側の先端部は接続管２１の接続口に接続されるが、接続管２１を使用しない場合には、グラウトホース７の先端部は注入口１ａに接続される。   In FIG. 4, a grout hose 7 filled with a grout material 6 is connected to the inlet 1 a of the leg 1, and the grout material 6 is filled between the leg 1 and the steel pipe pile 5 (overlapping section) from the grout hose 7. An example of the work procedure when doing this is shown. Also in the example shown here, since the connection pipe 21 is connected to the injection port 1a, the distal end portion on the discharge side of the grout hose 7 is connected to the connection port of the connection pipe 21, but when the connection pipe 21 is not used. The tip of the grout hose 7 is connected to the inlet 1a.

図４に示す例ではグラウトホース７が水中にある注入口１ａ（接続管２）に直接、接続されるため、グラウトホース７の注入口１ａへの接続と、脚部側弁１ｂとホース側弁７ａの開閉、及び重複区間へのグラウト材６充填後のグラウトホース７の離脱は潜水士によって操作される。   In the example shown in FIG. 4, since the grout hose 7 is directly connected to the inlet 1a (connection pipe 2) in water, the connection of the grout hose 7 to the inlet 1a, the leg side valve 1b and the hose side valve The opening and closing of 7a and the removal of the grout hose 7 after filling the grout material 6 into the overlapping section are operated by a diver.

図４の例ではグラウトホース７内にグラウト材６が充填され、ホース側弁７ａが閉鎖させられた状態で図４−（ｂ）に示すようにグラウトホース７の先端部が注入口１ａ（接続管２１）に接続される。この例では水中にある注入口１ａ（接続管２１）にグラウトホース７が接続されるため、予備グラウト材６１を先行して注入し、硬化させて重複区間内に存在している水を予め排出しておく場合には、図４−（ａ）に示すように脚部側弁１ｂは閉鎖状態にあり、グラウトホース７の接続後、（ｂ）に示すように開放させられる。重複区間内の水を抜かない場合には、脚部側弁１ｂはグラウトホース７の接続前から開放させられている場合もある。   In the example of FIG. 4, the grout hose 7 is filled with the grout material 6 and the hose side valve 7a is closed, and the tip of the grout hose 7 is connected to the inlet 1a (connection) as shown in FIG. Connected to the tube 21). In this example, the grout hose 7 is connected to the inlet 1a (connecting pipe 21) in the water, so the preliminary grout material 61 is injected in advance and cured to discharge the water existing in the overlapping section in advance. In this case, the leg-side valve 1b is in a closed state as shown in FIG. 4- (a), and is opened as shown in (b) after the grout hose 7 is connected. If the water in the overlapping section is not drained, the leg side valve 1b may be opened before the grout hose 7 is connected.

図４ではまた、シール材３上に直接、グラウト材６の充填を開始する様子を示しているが、前記のように脚部１の降下後の波浪等の影響によるシール材３の変形を防止する必要がある場合には、シール材３上に予備グラウト材６１が予め充填され、硬化させられる。   FIG. 4 also shows a state in which filling of the grout material 6 is started directly on the sealing material 3, but as described above, the deformation of the sealing material 3 due to the influence of waves after the legs 1 are lowered is prevented. When it is necessary to do this, the preliminary grout material 61 is filled in advance on the sealing material 3 and cured.

グラウトホース７の注入口１ａへの接続後、図４−（ｃ）に示すように脚部側弁１ｂと共にホース側弁７ａが開放させられ、グラウトホース７のグラウト材供給側からのグラウト材６の供給を開始することによりグラウトホース７内に充填されているグラウト材６の重複区間への連続（継続）した流入が開始させられる。   After the connection of the grout hose 7 to the inlet 1a, the hose side valve 7a is opened together with the leg side valve 1b as shown in FIG. 4- (c), and the grout material 6 from the grout material supply side of the grout hose 7 is opened. Is started, the continuous (continuous) inflow into the overlapping section of the grout material 6 filled in the grout hose 7 is started.

図４−（ｄ）に示すように先行するグラウト材６が鋼管杭５の天端から横溢したところで、グラウト材６の重複区間への充填が完了するため、グラウト材６の供給が停止させられ、（ｅ）に示すように脚部側弁１ｂとホース側弁７ａが閉鎖させられる。その後、グラウト材６の先端部が注入口１ａ（接続管２１）から離脱させられ、重複区間へのグラウト材６の充填作業が終了する。   As shown in FIG. 4- (d), when the preceding grout material 6 overflows from the top end of the steel pipe pile 5, the filling of the overlapping section of the grout material 6 is completed, so the supply of the grout material 6 is stopped. , (E), the leg side valve 1b and the hose side valve 7a are closed. Then, the front-end | tip part of the grout material 6 is made to detach | leave from the injection port 1a (connection pipe 21), and the filling operation | work of the grout material 6 to an overlap area is complete | finished.

１……脚部、１ａ……注入口、１ｂ……脚部側弁、１０……作業台、
２……注入管、２１……接続管、
３……シール材、
４……ブラケット、４ａ……載置部、４ｂ……流出孔、
５……鋼管杭、５ａ……フランジ、
６……グラウト材、６１……予備グラウト材、
７……グラウトホース、７ａ……ホース側弁、
８……仕切り材、
９……排水ホース。
1 ... Leg, 1a ... Inlet, 1b ... Leg side valve, 10 ... Work table,
2 ... Injection tube, 21 ... Connection tube,
3 …… Seal material,
4 ... Bracket, 4a ... Placement part, 4b ... Outflow hole,
5 ... Steel pipe pile, 5a ... Flange,
6 ... grout material, 61 ... preliminary grout material,
7 ... grout hose, 7a ... hose side valve,
8 …… Partition material,
9 …… Drain hose.

Claims (9)

水上構造物を支持する中空断面形状の脚部を、水底地盤に支持され、前記脚部の内径より小さい外径の鋼管杭の上方寄りの区間の周囲に配置し、この脚部に形成された注入口に直接、もしくは間接的に水上からグラウトホースを接続し、このグラウトホースを通じて前記脚部と前記鋼管杭との間にグラウト材を充填する方法であり、
前記注入口と前記グラウトホースの先端部にはそれぞれ開閉自在な脚部側弁とホース側弁が接続され、前記グラウトホース内に前記グラウト材を充填して前記ホース側弁を閉鎖させ、前記脚部側弁を閉鎖させた状態で前記グラウトホースの先端部を前記注入口に直接、もしくは間接的に接続した後、前記脚部側弁と前記ホース側弁を開放させて前記グラウト材を供給し、前記グラウトホース内に充填されている前記グラウト材を前記脚部と前記鋼管杭との間に流入させることを特徴とする水上構造物における脚部へのグラウト材の充填方法。 A leg section having a hollow cross-sectional shape that supports a floating structure is supported by the water bottom ground, and is disposed around a section near the upper side of the steel pipe pile having an outer diameter smaller than the inner diameter of the leg section. A grout hose is connected to the inlet directly or indirectly from the water, and the grout material is filled between the leg and the steel pipe pile through the grout hose.
A leg-side valve and a hose-side valve that can be freely opened and closed are connected to the inlet and the tip of the grout hose, respectively, the grout hose is filled with the grout material to close the hose-side valve, and the leg After directly or indirectly connecting the tip of the grout hose to the inlet with the part side valve closed, the leg part side valve and the hose side valve are opened to supply the grout material. A method for filling a grout material into a leg portion of a floating structure, wherein the grout material filled in the grout hose is caused to flow between the leg portion and the steel pipe pile. 前記グラウトホース内の、前記グラウト材の供給側に、前記グラウトホースの内周面に密着可能で、前記グラウト材の注入時の圧力を受けて前記グラウトホースの先端側へ移動可能な仕切り材が挿入されており、前記グラウトホース内に前記グラウト材を供給し、前記仕切り材が前記グラウトホースの先端部から放出されたときに前記ホース側弁を閉鎖させることを特徴とする請求項１に記載の水上構造物における脚部へのグラウト材の充填方法。   In the grout hose, on the grout material supply side, there is a partition material that can be brought into close contact with the inner peripheral surface of the grout hose and can move to the front end side of the grout hose under pressure when the grout material is injected. 2. The grouting material is inserted into the grouting hose, and the hose side valve is closed when the partition material is released from the tip of the grouting hose. Method of filling grout material into legs in a water structure in Japan. 前記注入口に、上端部が水上にまで連続し、水上より上に突出した注入管を接続し、この注入管に前記グラウトホースを接続し、前記グラウトホースから前記注入管へ前記グラウト材を流入させた後、前記注入管から前記脚部と前記鋼管杭との間へ前記グラウト材を流入させることを特徴とする請求項１、もしくは請求項２に記載の水上構造物における脚部へのグラウト材の充填方法。   The injection port is connected to an injection pipe whose upper end is continuous to the surface of the water and protrudes above the water. The grouting hose is connected to the injection pipe, and the grouting material flows into the injection pipe from the grouting hose. The grout to the leg part in the floating structure according to claim 1, wherein the grout material is caused to flow from the injection pipe into the space between the leg part and the steel pipe pile. Material filling method. 前記注入管の内部に存在する水を排出した後、前記注入管に前記グラウトホースを接続し、前記注入管への前記グラウト材の流入を開始することを特徴とする請求項３に記載の水上構造物における脚部へのグラウト材の充填方法。   4. The water surface according to claim 3, wherein after the water existing inside the injection pipe is discharged, the grout hose is connected to the injection pipe and the inflow of the grout material into the injection pipe is started. A method of filling grout material into legs in a structure. 前記注入口に、前記グラウト材が充填された前記グラウトホースを接続し、前記グラウトホースから前記脚部と前記鋼管杭との間へ前記グラウト材を流入させることを特徴とする請求項１、もしくは請求項２に記載の水上構造物における脚部へのグラウト材の充填方法。   The grout hose filled with the grout material is connected to the injection port, and the grout material is caused to flow from the grout hose between the leg portion and the steel pipe pile, or A method of filling a grout material into legs in the water structure according to claim 2. 前記グラウト材の注入に先立ち、前記脚部と前記鋼管杭との間に存在する水を排出することを特徴とする請求項１乃至請求項５のいずれかに記載の水上構造物における脚部へのグラウト材の充填方法。   The water existing between the leg and the steel pipe pile is discharged prior to the injection of the grout material, to the leg in the floating structure according to any one of claims 1 to 5. Filling method of grout material. 前記グラウトホース、もしくは前記注入管から前記グラウト材を前記脚部と前記鋼管杭との間に継続して流入させる以前に、前記グラウトホース内、もしくは前記注入管内の一部のグラウト材を予備グラウト材として前記脚部と前記鋼管杭との間に流入させて硬化させ、前記脚部の下端部の内周面と前記鋼管杭との間に介在するシール材の変形を拘束することを特徴とする請求項１乃至請求項６のいずれかに記載の水上構造物における脚部へのグラウト材の充填方法。   Before the grout material from the grout hose or the injection pipe is allowed to continuously flow between the legs and the steel pipe pile, a part of the grout material in the grout hose or the injection pipe is preliminarily grouted. It is made to flow between the said leg part and the said steel pipe pile as a material, is hardened, and restrains the deformation | transformation of the sealing material interposed between the internal peripheral surface of the lower end part of the said leg part and the said steel pipe pile, A method of filling a grout material into a leg portion of a floating structure according to any one of claims 1 to 6. 前記注入口は前記脚部の周方向に分散して複数個、形成され、この複数個の前記注入口に前記注入管、もしくは前記グラウトホースを接続することを特徴とする請求項１乃至請求項７のいずれかに記載の水上構造物における脚部へのグラウト材の注入方法。   2. The injection port according to claim 1, wherein a plurality of the injection ports are formed in a distributed manner in a circumferential direction of the leg portion, and the injection tube or the grout hose is connected to the plurality of the injection ports. A method for injecting a grout material into a leg portion of the water structure according to any one of claims 7 to 10. 前記グラウト材の材齢２８日における圧縮強度が１００Ｎ／ｍｍ２を超えていることを特徴とする請求項１乃至請求項８のいずれかに記載の水上構造物における脚部へのグラウト材の注入方法。
Injection of grout into the legs of the floating structure according to any one of claims 1 to 8 compressive strength at age of 28 days of the grout material is characterized in that beyond the 100 N / mm 2 Method.
JP2016096250A 2016-05-12 2016-05-12 Method of filling grout material into legs in floating structure Active JP6691430B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016096250A JP6691430B2 (en) 2016-05-12 2016-05-12 Method of filling grout material into legs in floating structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016096250A JP6691430B2 (en) 2016-05-12 2016-05-12 Method of filling grout material into legs in floating structure

Publications (2)

Publication Number Publication Date
JP2017203317A true JP2017203317A (en) 2017-11-16
JP6691430B2 JP6691430B2 (en) 2020-04-28

Family

ID=60322051

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016096250A Active JP6691430B2 (en) 2016-05-12 2016-05-12 Method of filling grout material into legs in floating structure

Country Status (1)

Country Link
JP (1) JP6691430B2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412759A (en) * 1978-05-11 1983-11-01 Oil States Industries, Inc. Reach rod grouting system
JPS6145027A (en) * 1984-08-10 1986-03-04 Mitsubishi Heavy Ind Ltd Fixation of pile and base seat
JPH0358338U (en) * 1989-10-09 1991-06-06
JP2011196053A (en) * 2010-03-18 2011-10-06 Penta Ocean Construction Co Ltd Method of injecting grout, method of constructing bridge using the same, and foundation pile fixing structure applicable to the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412759A (en) * 1978-05-11 1983-11-01 Oil States Industries, Inc. Reach rod grouting system
JPS6145027A (en) * 1984-08-10 1986-03-04 Mitsubishi Heavy Ind Ltd Fixation of pile and base seat
JPH0358338U (en) * 1989-10-09 1991-06-06
JP2011196053A (en) * 2010-03-18 2011-10-06 Penta Ocean Construction Co Ltd Method of injecting grout, method of constructing bridge using the same, and foundation pile fixing structure applicable to the same

Also Published As

Publication number Publication date
JP6691430B2 (en) 2020-04-28

Similar Documents

Publication Publication Date Title
JP6824464B1 (en) Marine structure and construction method of marine structure
JP2008002213A (en) Grouting method and grouting control system for joint part of precast reinforced concrete member
JP2019183410A (en) Recharge method and recharge well system
CN110106904B (en) Steel pipe pile structure and jacket foundation construction process
JP2015229860A (en) Method to control groundwater movement in excavated pit, grout filling method, and water storage means
KR100921188B1 (en) Connecting structure and connecting methods of immersed tunnel
JP2017203317A (en) Method of filling leg part of aquatic structure with grout material
KR101723987B1 (en) Marine foundation and construction method thereof
JP5383568B2 (en) Grout injection construction method, pier construction method using this construction method, and foundation pile fixing structure applicable to this construction method
JP6650278B2 (en) Method of joining legs to steel pipe piles in floating structures and legs for supporting floating structures
CN111519604A (en) Deep-hole sleeve valve pipe grouting device and application method thereof
US8888407B2 (en) Method and a device for sealing and/or securing a borehole
JPH09220764A (en) Lining material for manhole and manhole lining method
JP2011084923A (en) Water sealing structure of steel pipe pile foundation, and method for constructing steel pipe pile foundation
JP6420108B2 (en) Piping connection method
KR101674417B1 (en) Drainage system using siphon phenomenon
JP5643012B2 (en) Recovery method of crude oil erupted on the seabed
JP6362866B2 (en) Method to prevent corrosion of steel pipe structures
JPH09144016A (en) Execution method of concrete in underground water leakage section
KR101705945B1 (en) Drought water membrane construction method
CN106088175B (en) Rectifying of leaned building device and method
JP6633451B2 (en) Water supply system
KR102041474B1 (en) Connector for connection of manhole and hume pipe
JP2022070105A (en) Fluid transfer device
JP2011084924A (en) Steel pipe pile foundation and method for constructing the steel pipe pile foundation

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160512

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20160513

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190311

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200114

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200121

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200313

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200407

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200410

R150 Certificate of patent or registration of utility model

Ref document number: 6691430

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250