JP2015117551A - Tip member of filling pipe for earth retaining work, and earth retaining method - Google Patents

Tip member of filling pipe for earth retaining work, and earth retaining method Download PDF

Info

Publication number
JP2015117551A
JP2015117551A JP2013263132A JP2013263132A JP2015117551A JP 2015117551 A JP2015117551 A JP 2015117551A JP 2013263132 A JP2013263132 A JP 2013263132A JP 2013263132 A JP2013263132 A JP 2013263132A JP 2015117551 A JP2015117551 A JP 2015117551A
Authority
JP
Japan
Prior art keywords
earth retaining
retaining member
stopper
injection material
tip member
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
JP2013263132A
Other languages
Japanese (ja)
Other versions
JP6273603B2 (en
Inventor
大地 山下
Daichi Yamashita
大地 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP2013263132A priority Critical patent/JP6273603B2/en
Publication of JP2015117551A publication Critical patent/JP2015117551A/en
Application granted granted Critical
Publication of JP6273603B2 publication Critical patent/JP6273603B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Piles And Underground Anchors (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent sediment from getting into the tip member of a filling pipe when the filling pipe is fitted to an earth retaining member and struck into a ground when erecting the earth retaining member, and to ensure proper discharge of filled materials when the earth retaining member is pulled out.SOLUTION: A tip member of filling pipe for earth retaining work comprises: a flat contacting surface 5 with an earth retaining member; a wedge-shaped part installed at the bottom; two or more filling material guiding ports 4 installed at the upper part; a filling material mixing chamber 6 that leads to the filling material guiding ports 4; a plug shifting channel 7 leading to the filling material mixing chamber 6; a filling material discharging hole 8 leading to a surface other than the contacting surface 5 with an earth retaining member from the plug shifting channel 7; a pressure release hole 9 leading to the contacting surface 5 with an earth retaining member from a lower part of the plug shifting channel 7; a plug 12 installed to move up and down in the plug shifting channel 7; and an energizing member 14 that exerts an upward force to the plug 12. The plug 12 is to block the filling material discharging hole 8 when it is located at the topmost position and not to block the filling material discharging hole 8 when the plug 12 is descended.

Description

この発明は、鋼矢板などで土留めを行いながら地中に水道管、ガス管、側溝、カルバートボックス等を埋設する土留め工事の施工に関するものである。 The present invention relates to construction of earth retaining work in which a water pipe, a gas pipe, a gutter, a culvert box and the like are buried in the ground while earth retaining with a steel sheet pile or the like.

地中に水道管、ガス管、カルバートボックス、下水管、側溝等を埋設する工事においては、まず溝の両壁を構成すべき位置に簡易矢板、鉄板、シートパイル等の土留め部材を設置して溝壁が崩れるのを防止した上で、地面を掘削して溝を形成し、溝内での水道管等の敷設作業が行われる。敷設作業が終了し溝を埋めなおした後に、土留め部材は地中から引き抜かれる。しかし、地中には土留め部材の体積分の空隙が生じることになる。この空隙を埋めるために周囲の土砂が移動し、さまざまな問題が生じうる。例えば、時間とともに溝内に充填した砂や土砂が空隙を埋めるために移動し、溝の上に敷かれた舗装面が沈下して、道路表面にくぼみを生じる。また、溝の外の土砂が移動することにより、溝の両側の地盤状態に変動をきたし、近くの建造物に影響を与えうる。さらに、周囲の地下水の状態が変われば、広範囲での影響も発生する。地下水は最も通りやすいところに水路を形成するので、土留め部材の引き抜きによって生じた空隙や、それを埋めるために移動した土砂によってできた水の通りやすい場所に新たな水路を形成し、周囲の地下水の流れが大きく変動する。この地下水の状態の変動によってそれまで保たれていた周囲の地盤の地圧のバランスがくずれ、地盤沈下等の地盤変動が生じ、そこに建造されている塀や建物等を変形させることになる。 When constructing underground pipes such as water pipes, gas pipes, culvert boxes, sewer pipes, gutters, etc., first install earth retaining members such as simple sheet piles, iron plates, and sheet piles at the positions where both walls of the groove should be constructed. After preventing the wall from collapsing, the ground is excavated to form a groove, and a water pipe or the like is laid in the groove. After the laying operation is completed and the groove is refilled, the earth retaining member is pulled out from the ground. However, a void corresponding to the volume of the earth retaining member is generated in the ground. The surrounding earth and sand moves to fill this gap, and various problems can occur. For example, as time passes, sand or earth and sand filled in the groove move to fill the gap, and the pavement surface laid on the groove sinks, resulting in a depression on the road surface. Moreover, when the earth and sand outside the groove move, the ground condition on both sides of the groove changes, and nearby buildings can be affected. Furthermore, if the surrounding groundwater conditions change, a wide range of effects will also occur. Since the groundwater forms a waterway where it is most likely to pass, a new waterway is formed in a space where the water created by the removal of the earth retaining member and the water created by the earth and sand moved to fill it can be Groundwater flow fluctuates greatly. Due to the change in the state of the groundwater, the ground pressure balance of the surrounding ground that has been maintained until then is lost, and ground changes such as ground subsidence occur, which deforms the walls and buildings built there.

そこで、シートパイルによる空隙を生じさせないために、シートパイルを引き抜かず、施工後も地中へ残すことが考えられる。しかし、地中に残されたシートパイルは時間とともに酸化・腐食により消失し、いずれは上述のような問題が生じることに変わりがない。また、シートパイルの素材である金属が土壌や地下水等を汚染することになる。シートパイルを使い捨てにすることは資源としても無駄な消費である。 Therefore, in order not to generate a gap due to the sheet pile, it is conceivable that the sheet pile is not pulled out and remains in the ground after construction. However, the sheet pile left in the ground disappears due to oxidation / corrosion with time, and the above-mentioned problems still occur. Moreover, the metal which is the material of a sheet pile will contaminate soil, groundwater, etc. Disposing sheet piles is a wasteful use of resources.

引用文献１（特開昭６４−５８７１３）には、鋼矢板の引抜き時に土砂を落下させて空隙を埋めることが記載されている。引用文献２（特開昭５７−１０８３１１）および引用文献３（特開昭５７−１０８３１２）には「地盤圧密剤」を注して空洞を埋めることが、引用文献４（特開昭４９−４９４０４）には、「充填材」を注入することが記載されている。さらに、引用文献５（特許第４８９７９８５号特許公報）には、硬化剤を送り込む流路を有し、複数の部分に長さ方向に分割されている硬化剤注入管であり、分割された硬化剤注入管同士を軸方向に挿し込むことによって各流路同士をつなぐように接続する接続部材と、土留め部材に当接する平面状の土留め部材取り付け面を有する土留め工事用硬化剤注入管が記載されている。 Cited Document 1 (Japanese Patent Laid-Open No. 64-58713) describes that earth and sand are dropped to fill a gap when a steel sheet pile is pulled out. In Cited Document 2 (Japanese Patent Laid-Open No. 57-108311) and Cited Document 3 (Japanese Patent Laid-Open No. 57-108312), it is possible to fill a cavity with a “ground compaction agent”. ) Describes that a “filler” is injected. Further, cited document 5 (Patent No. 4897985) discloses a hardener injection pipe that has a flow path for feeding a hardener and is divided into a plurality of portions in the length direction. A hardener injection pipe for earth retaining work having a connecting member that connects the flow paths by inserting the injection pipes in an axial direction and a planar earth retaining member mounting surface that abuts the earth retaining member. Have been described.

特開昭６４−５８７１３号公開特許公報Japanese Patent Application Laid-Open No. 64-58713 特開昭５７−１０８３１１号公開特許公報Japanese Patent Laid-Open No. 57-108311 特開昭５７−１０８３１２号公開特許公報Japanese Patent Laid-Open No. 57-108312 特開昭４９−４９４０４号公開特許公報Japanese Patent Laid-Open No. 49-49404 特許第４８９７９８５号特許公報Patent No. 4897985 Patent Gazette

特許文献１に記載の方法は実施が不可能なものである。土砂を地中に埋め戻すにあたっては、約２５ｃｍごとに点圧器で点圧を行い、さらに水をかけてしめ固めなければならない。しかし、鋼矢板の引抜き跡に入れられた土砂に対して点圧を行うことはできない。また、鋼矢板の引抜き中や引抜き直後に地中に水を供給すれば、かえって地盤沈下を加速させることになる。点圧も水しめも行われない土砂は空隙が多く、地盤変動を防止することができない。 The method described in Patent Document 1 cannot be performed. When refilling the earth and sand into the ground, it is necessary to apply point pressure with a point pressure device about every 25 cm, and then apply water to consolidate. However, point pressure cannot be applied to the earth and sand put in the drawing sheet of the steel sheet pile. Moreover, if water is supplied into the ground during or immediately after the steel sheet piles are pulled out, ground subsidence is accelerated. Sediment that is not subjected to point pressure or squeezing has many voids and cannot prevent ground deformation.

特許文献２および特許文献３には「地盤圧密剤」が記載されているが、これらの文献には「地盤圧密剤」についての具体的な説明は一切なく、結局、どのように実施すべきかは不明である。特許文献４の「充填材」についても同文献中に記載はなく、どのように実施すべきかは不明である。 Patent Document 2 and Patent Document 3 describe “ground compaction agent”, but these documents do not have any specific explanation about “ground compaction agent”. It is unknown. The “filler” of Patent Document 4 is not described in the same document, and it is unclear how it should be implemented.

一方、特許文献５には、土留め部材、硬化剤注入管、作業手順、硬化剤の種類などが具体的に示されており、実施可能な技術が提示されている。特許文献５の図２、図１４、００１６段落、００１７段落、００４８段落には、先端部材が詳細に示されている。その図１４では、先端部材は略直方体状の外形を有し、特に最先端部の面は斜めに切り取られた形状に形成されており、建て込み時に土中を進行しやすくなっている。先端部材において二つの流路は合流し、液体が混合されるようになっている。側面に３つの吐出口を横方向に有する。そして、内部には栓が上下動可能に設けられているが、付勢部材により上方向に付勢されており、上面に大気圧がかかっている状態で、栓は吐出口を塞ぐ位置にある。 On the other hand, Patent Document 5 specifically shows a retaining member, a curing agent injection tube, a work procedure, a type of a curing agent, and the like, and presents a feasible technique. The tip member is shown in detail in FIGS. 2, 14, 0016, 0017, and 0048 of Patent Document 5. In FIG. 14, the tip member has a substantially rectangular parallelepiped outer shape, and in particular, the surface of the most distal end portion is formed in an obliquely cut shape, so that it is easy to advance in the soil when it is built. In the tip member, the two flow paths merge so that the liquid is mixed. There are three outlets in the lateral direction on the side. The stopper is provided in the inside so as to be movable up and down, but is biased upward by the biasing member, and the stopper is in a position to close the discharge port in a state where atmospheric pressure is applied to the upper surface. .

しかし、本願発明者らは、特許文献５に記載の先端部材の使用を重ねることにより、問題点があることを見出した。すなわち、先端部材を土留め部材とともに地中に建て込むときに、栓が上下動して吐出口が開いた状態となり、この吐出口から土砂が内部に入り込む問題が発生した。特に、土留め部材を打撃により建て込んだり、振動式杭打機したときには、先端部材の栓の上下動が大きくなり、土砂の流入が発生しやすい。先端部材の中に土砂が入ると栓の滑らかな移動を妨げ、注入材を導入しても吐出口を開放する位置まで栓を押し下げることができない。また、注入材の流れを妨げ、良好な吐出が行えなくなる。 However, the present inventors have found that there is a problem by repeatedly using the tip member described in Patent Document 5. That is, when the tip member is built in the ground together with the earth retaining member, the stopper is moved up and down and the discharge port is opened, and there is a problem that earth and sand enter the inside from the discharge port. In particular, when the earth retaining member is built by hitting or when the vibration pile driving machine is used, the vertical movement of the plug of the tip member becomes large, and the inflow of earth and sand tends to occur. When earth and sand enters the tip member, the stopper is prevented from moving smoothly, and even if an injection material is introduced, the stopper cannot be pushed down to the position where the discharge port is opened. In addition, the flow of the injection material is hindered, and good discharge cannot be performed.

この発明は、土留め部材の建て込みにおいて先端部材の中に土砂が入ることを防止し、土留め部材の引抜時において注入材の吐出が良好かつ確実に行えるような先端部材および土留め工法を提供することを目的とする。 The present invention provides a tip member and a retaining method that prevent soil and sand from entering the tip member during the construction of the retaining member, and that allows the injection material to be discharged well and reliably when the retaining member is pulled out. The purpose is to provide.

上述の課題を解決するため、この発明の土留め工事用注入管の先端部材は、平坦な土留め部材接触面と、下部に設けられたくさび状部と、上部に設けられた２以上の注入材導入口と、注入材導入部に続く注入材混合室と、注入材混合室に続く栓移動路と、栓移動路から土留め部材接触面以外の面に続く注入材吐出孔と、栓移動路の下部から土留め部材接触面に続く圧力抜き孔と、栓移動路内を上下動可能に設けられた栓と、栓に上向きの力を加えるバネとを有し、栓が最上部にあるときに栓が注入材吐出孔をふさぎ、栓が下がった時に栓が注入材吐出孔をふさがないようになっているようになしたものである。栓は概ね円柱状であり、栓にはＯリングが設けられていることが好ましい。 In order to solve the above-mentioned problem, the tip member of the injection pipe for earth retaining work of the present invention includes a flat earth retaining member contact surface, a wedge-shaped part provided at the lower part, and two or more injections provided at the upper part. A material introduction port, an injection material mixing chamber following the injection material introduction portion, a plug movement path following the injection material mixing chamber, an injection material discharge hole extending from the plug movement path to a surface other than the retaining member contact surface, and a plug movement It has a pressure relief hole that extends from the lower part of the road to the earth retaining member contact surface, a stopper that can be moved up and down in the stopper moving path, and a spring that applies an upward force to the stopper, with the stopper at the top. Sometimes, the plug blocks the injection material discharge hole, and when the plug is lowered, the plug does not block the injection material discharge hole. The stopper is generally cylindrical, and it is preferable that the stopper is provided with an O-ring.

また、この発明の土留め工法は、上述の土留め工事用注入管の先端部材を使用して注入材を注入して抜き跡を充填しながら土留め部材を引き抜く土留め工法であり、
栓より下側の栓移動路栓移動路にグリスを充填し、注入材吐出孔と圧力抜き孔に粘土を外側から詰め、平坦な土留め部材接触面を土留め部材に当てるようにして土留め部材の下端部に取り付け、さらに注入材導入口に注入管を接続し、この土留め部材を施工場所に打ち込んで土留め壁を形成し、
施工後には注入管で先端部材に注入材を送り込み、先端部材の注入材吐出孔より注入材を地中に注入して土留め部材の引抜き跡を充填しながら土留め部材を撤去する。土留め部材の表面に万力を溶接し、この万力によって先端部材を土留め部材に固定し、溶接によって先端部材を土留め部材に仮留めし、万力を土留め部材から取り外した後に溶接によって先端部材を土留め部材を最終的に固定することが好ましい。 Moreover, the earth retaining method of the present invention is an earth retaining method in which the earth retaining member is pulled out while filling the trace by injecting the injection material using the tip member of the above-described earth retaining construction injection pipe,
Fill the stopper movement path below the stopper with grease, fill the injection material discharge hole and the pressure release hole with clay from the outside, and hold the earth retaining member so that the flat retaining member contact surface touches the retaining member. Attach to the lower end of the member, connect the injection pipe to the injection material introduction port, drive this earth retaining member into the construction site to form the earth retaining wall,
After the construction, the injection material is fed into the tip member by the injection pipe, the injection material is injected into the ground through the injection material discharge hole of the tip member, and the earth retaining member is removed while filling the extraction trace of the earth retaining member. A vise is welded to the surface of the earth retaining member, the tip member is fixed to the earth retaining member by this vise, the tip member is temporarily secured to the earth retaining member by welding, and the vise is removed from the earth retaining member before welding. It is preferable to finally fix the tip member to the earth retaining member.

この発明の先端部材および土留め工法によれば、土留め部材の建て込みにおいて先端部材の中に土砂が入ることを防止し、土留め部材の引抜時において注入材の吐出が良好かつ確実に行えるような先端部材および土留め工法を提供することができる。したがって、油圧式杭圧入引抜機だけでなく打撃式杭打機や振動式杭打機などさまざまな設備について適用することができる。 According to the tip member and the earth retaining method of the present invention, it is possible to prevent earth and sand from entering the tip member during the construction of the earth retaining member, and to discharge the injection material satisfactorily and reliably when the earth retaining member is pulled out. Such a tip member and the earth retaining method can be provided. Therefore, it can be applied not only to the hydraulic pile press-fitting and pulling machine but also to various facilities such as a hammering pile driver and a vibration pile driver.

土留め工事用注入管の先端部材を示す正面図である。It is a front view which shows the front-end | tip member of the injection pipe for earth retaining work. 同背面図である。It is the same rear view. 同側面図である。It is the same side view. 同Ａ−Ａ断面図である。It is the same AA sectional view. 同Ｂ−Ｂ断面図である。It is the BB sectional drawing. 注入管を示す概念図である。It is a conceptual diagram which shows an injection tube. 土留め部材の中央面への注入管の取り付け作業を示す斜視図である。It is a perspective view which shows the attachment operation | work of the injection pipe to the center surface of a earth retaining member. 土留め部材の側面への注入管の取り付け作業を示す斜視図である。It is a perspective view which shows the attachment operation | work of the injection pipe to the side surface of a earth retaining member.

この発明を実施するための形態について、図面に基づいて説明する。図１は土留め工事用注入管の先端部材を示す正面図、図２は同背面図で、図３は同側面図、図４は同Ａ−Ａ断面図、図５は同Ｂ−Ｂ断面図である。 EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated based on drawing. 1 is a front view showing a tip member of an injection pipe for earth retaining work, FIG. 2 is a rear view thereof, FIG. 3 is a side view thereof, FIG. 4 is a sectional view taken along the line AA, and FIG. FIG.

先端部材１は上部部材２と下部部材３を有する。上部部材２は略直方体であり、上部には２以上の注入材導入口４ａ，４ｂが設けられている。本例では、独立した注入材導入口４が２つ並列に設けられている。上部部材２の背面は土留め部材接触面５であり、土留め部材ｘの表面に密着できるように平坦に形成されている。 The tip member 1 has an upper member 2 and a lower member 3. The upper member 2 is a substantially rectangular parallelepiped, and two or more injection material introduction ports 4a and 4b are provided in the upper part. In this example, two independent injection material introduction ports 4 are provided in parallel. The back surface of the upper member 2 is the earth retaining member contact surface 5 and is formed flat so as to be in close contact with the surface of the earth retaining member x.

先端部材１の内部には注入材導入口４ａ，４ｂに続く広い空間が設けられており、注入材混合室６となっている。注入材混合室６の下には先端部材１の下面まで貫通した円形の孔が形成されており、栓移動路７となっている。栓移動路７の中程の位置から土留め部材接触面以外の面に向けて横方向に孔が貫通しており、注入材吐出孔となっている。また、栓移動路７の中程の下部には土留め部材接触面５に続く圧力抜き孔９となっている。 A wide space following the injection material introduction ports 4 a and 4 b is provided inside the tip member 1 and serves as an injection material mixing chamber 6. A circular hole penetrating to the lower surface of the tip member 1 is formed under the injection material mixing chamber 6 and serves as a plug movement path 7. A hole penetrates laterally from the middle position of the stopper moving path 7 to a surface other than the retaining member contact surface, and serves as an injection material discharge hole. In addition, a pressure release hole 9 is provided in the middle lower part of the stopper moving path 7, following the retaining member contact surface 5.

下部部材３も上部は略直方体の形状であるが、先端部は正面側が斜めに切り落とされてくさび状になっている。下部部材３の背面も平坦に仕上げられ、土留め部材接触面となっている。下部部材３の上部には円柱状の突起部１０が形成されており、その外径は栓移動路７の内径に対応している。この突起部１０にはＯリング１１が取り付けられる。 The lower member 3 also has a substantially rectangular parallelepiped shape at the upper portion, but the front end portion is cut off obliquely at the front side and has a wedge shape. The back surface of the lower member 3 is also finished flat and serves as a retaining member contact surface. A cylindrical projection 10 is formed on the upper portion of the lower member 3, and the outer diameter thereof corresponds to the inner diameter of the plug moving path 7. An O-ring 11 is attached to the protrusion 10.

栓移動路７の中には、栓１２が上下動可能に設けられる。栓１２の外径は栓移動路７の内径とほぼ同じか、それより若干小さめである。そして、２つのＯリング１３が取り付けられている。栓１２の下にはバネなどの付勢部材１４が設けられ、栓１２を上に押し上げる力を加えており、他に外力がかかっていないときは栓１２は最上部まで押し上げられている。そして、栓１２が最上部にあるときに栓１２が注入材吐出孔８をふさぎ、栓１２が下がった時に栓１２が注入材吐出孔８をふさがないようになっている。栓１２は十分な長さを有し、少し下がった程度ではまだ注入材吐出孔８されず、十分に下がりきった時に注入材吐出孔８が開放する。栓移動路７の長さは１００ｍｍ以上１２０ｍｍ以下、栓１２の長さは３８ｍｍ以上４２ｍｍ以下とし、バネは５Ｋｇ重以上の力が加わったときに栓１２が注入材吐出孔の開放位置まで下るような強さにすることが好ましい。本例では、栓移動路７の内径は１８．２ｍｍで長さは１１０ｍｍ、栓１２の長さは４０ｍｍであり、６Ｋｇ重の力が加わった時に栓１２が注入材吐出孔８の開放位置まで下るような強さのバネを使用した。これにより、打ち込みのときの衝撃や振動では容易には注入材吐出孔８の開放位置まで下がらず、注入時には注入材の圧力により注入材吐出孔８の開放位置まで下るようにすることができる。 A plug 12 is provided in the plug moving path 7 so as to be movable up and down. The outer diameter of the stopper 12 is substantially the same as or slightly smaller than the inner diameter of the stopper moving path 7. Two O-rings 13 are attached. A biasing member 14 such as a spring is provided under the stopper 12 to apply a force for pushing the stopper 12 upward. When no other external force is applied, the stopper 12 is pushed up to the top. The stopper 12 closes the injection material discharge hole 8 when the stopper 12 is at the uppermost part, and the stopper 12 does not block the injection material discharge hole 8 when the stopper 12 is lowered. The stopper 12 has a sufficient length. When the stopper 12 is slightly lowered, the stopper 12 is not yet injected, and the injector discharge hole 8 is opened when the stopper 12 is sufficiently lowered. The length of the plug movement path 7 is 100 mm or more and 120 mm or less, the length of the plug 12 is 38 mm or more and 42 mm or less, and the spring 12 is lowered to the open position of the injection material discharge hole when a force of 5 kg or more is applied. It is preferable to make it strong. In this example, the inner diameter of the plug moving path 7 is 18.2 mm, the length is 110 mm, the length of the plug 12 is 40 mm, and when the force of 6 kg is applied, the plug 12 reaches the open position of the injection material discharge hole 8. We used a spring that was strong enough to come down. Thereby, the impact and vibration at the time of driving cannot be easily lowered to the opening position of the injection material discharge hole 8 but can be lowered to the opening position of the injection material discharge hole 8 by the pressure of the injection material at the time of injection.

次に、注入管について説明する。ここで、注入管とは先端部材１を含め、注入材の注入のために土留め部材に取り付けられる一連の部材の総称である。図６は注入管を示す概念図である。 Next, the injection tube will be described. Here, the injection tube is a general term for a series of members including the tip member 1 and attached to the earth retaining member for injection of the injection material. FIG. 6 is a conceptual diagram showing an injection tube.

中間ロッド２１ａ、２１ｂは平行に設けられた２本の円柱状のパイプである。それぞれのパイプ２１ａ、２１ｂが独立した薬液の流路を形成する。この中間ロッド２１ａ、２１ｂは長さ方向に分割されている。そして、長さ方向に差し込むことによって接続する接続部材によって接続される。 The intermediate rods 21a and 21b are two cylindrical pipes provided in parallel. Each pipe 21a, 21b forms an independent chemical liquid flow path. The intermediate rods 21a and 21b are divided in the length direction. And it connects by the connection member connected by inserting in a length direction.

そして、接続箇所にはブレ止め部材２２が取り付けられる。ブレ止め部材２２は略直方体状の外形を有し、パイプ２１ａ、２１ｂを収容するための２本の孔２２ａ，２２ｂが貫通している。このブレ止め部材２２によってパイプ２１ａ、２１ｂの相互の位置関係が固定され、土留め部材の建て込み時などにおけるパイプ２１ａ、２１ｂのブレを防止する。最上部には、薬液を供給するホース２３を接続するための注入材導入部材２４が設けられる。 And the anti-shake member 22 is attached to a connection location. The anti-blur member 22 has a substantially rectangular parallelepiped outer shape, and two holes 22a and 22b for receiving the pipes 21a and 21b pass therethrough. The positional relationship between the pipes 21a and 21b is fixed by the anti-blur member 22 to prevent the pipes 21a and 21b from blurring when the earth retaining member is installed. At the top, an injection material introducing member 24 for connecting a hose 23 for supplying a chemical solution is provided.

図７は土留め部材の中央面への硬化剤注入管の取り付け作業を示す斜視図である。コの字型の断面形状を持つシートパイル（鋼矢板）を土留め部材として使用する例である。まず、先端部材１と中間ロッド２１ａ、２１ｂを接続部材を介して長さ方向に差し込むことによって、ワンタッチで接続する。そして、中間ロッド２１ａ、２１ｂの他端部にブレ止め部材２２を取り付ける。ブレ止め部材２２も、パイプ２１ａ、２１ｂを孔２２ａ，２２ｂに通すようにして取り付けることができる。そして、先端部材１およびブレ止め部材２２を鋼矢板ｘに溶接する。先端部材１およびブレ止め部材２２は略直方体状であり、平面状の土留め部材取り付け面を有するので、簡単かつ確実に取り付けることができる。 FIG. 7 is a perspective view showing an operation of attaching the hardener injection pipe to the center surface of the earth retaining member. This is an example in which a sheet pile (steel sheet pile) having a U-shaped cross-sectional shape is used as a retaining member. First, the tip member 1 and the intermediate rods 21a and 21b are connected in one-touch by inserting them in the length direction via connecting members. Then, the anti-blur member 22 is attached to the other end of the intermediate rods 21a and 21b. The anti-blur member 22 can also be attached so that the pipes 21a and 21b pass through the holes 22a and 22b. Then, the tip member 1 and the anti-blur member 22 are welded to the steel sheet pile x. Since the tip member 1 and the anti-blur member 22 have a substantially rectangular parallelepiped shape and have a flat earth retaining member attachment surface, they can be easily and reliably attached.

ここで、先端部材の取付方法について詳細に説明する。まず、先端部材１を組み立てる。栓１２にグリスを塗り、栓１２を上部部材２の下の孔より栓移動路７の中に挿入して、最上部まで押し込む。次に、上部部材２の下の孔よりグリスを詰める。このとき、中に空気が入らないようにし、入口までいっぱいにグリスを詰める。そして、付勢部材１４（バネ）を栓移動路７の中に挿入する。それから、下部部材３の突起部１０を栓移動路７の中に挿入し、上部部材２と下部部材３を接続する。注入材吐出孔８に外側よりグリスを半分程度入れ、さらに粘土を詰めて封をする。圧力抜き孔９には粘土のみを詰める。 Here, a method for attaching the tip member will be described in detail. First, the tip member 1 is assembled. Apply grease to the stopper 12, insert the stopper 12 into the stopper moving path 7 through the hole below the upper member 2, and push it to the top. Next, grease is filled from the hole below the upper member 2. At this time, make sure that there is no air inside, and fill the grease up to the entrance. Then, the urging member 14 (spring) is inserted into the plug moving path 7. Then, the protrusion 10 of the lower member 3 is inserted into the stopper moving path 7 to connect the upper member 2 and the lower member 3. About half of the grease is put into the injection material discharge hole 8 from the outside, and further sealed with clay. The pressure relief hole 9 is filled only with clay.

土留め部材の下端から２０ｃｍの位置に先端部材１の最先端が位置するように取り付ける。まず、先端部材１が取り付けられるべき位置の土留め部材の表面を研磨し、より滑らかにする。先端部材１の土留め部材接触面５も研磨する。次に、土留め部材に万力を溶接で取り付ける。この万力により先端部材１を土留め部材に取り付け、点溶接によって、先端部材１を土留め部材に仮留めする。そして、万力を土留め部材から取り外す。先端部材１は土留め部材に仮留めされているので、位置がずれることはない。さらに、溶接により先端部材１を土留め部材に本付けする。こうして、先端部材１は正しい位置に、正確かつ確実に固定される。 It attaches so that the forefront of the tip member 1 may be located at a position 20 cm from the lower end of the earth retaining member. First, the surface of the earth retaining member at the position where the tip member 1 is to be attached is polished and smoothed. The earth retaining member contact surface 5 of the tip member 1 is also polished. Next, a vise is attached to the earth retaining member by welding. The tip member 1 is attached to the earth retaining member by this vise, and the tip member 1 is temporarily secured to the earth retaining member by spot welding. Then, the vise is removed from the earth retaining member. Since the tip member 1 is temporarily fixed to the earth retaining member, the position does not shift. Further, the tip member 1 is permanently attached to the earth retaining member by welding. Thus, the tip member 1 is fixed accurately and reliably at the correct position.

ついで、次の中間ロッド２１ａ、２１ｂを接続する。また、追加した中間ロッド２１ａ、２１ｂの上部にブレ止め部材２２を取り付ける。中間ロッド２１同士の接続も、接続部材を介して長さ方向に差し込むことによって、ワンタッチで行える。ネジ式でないので中間ロッド２１同士を回転する必要がないので、このように先端部から順次接続することができる。レンチなどの工具も特に要しない。中間ロッドの最上端は土留め部材の上端よりも低い位置にする。油圧式杭圧入引抜機を使用する場合であれば、土留め部材の上端よりも７０ｃｍ程度低い位置に注入材導入部材２４の上端部を合わせる。そして、中間ロッドの最上端には土砂の流入を防止するキャップをかぶせる。 Next, the next intermediate rods 21a and 21b are connected. Moreover, the anti-blur member 22 is attached to the upper part of the added intermediate rods 21a and 21b. The intermediate rods 21 can also be connected with one touch by inserting them in the length direction via a connecting member. Since it is not a screw type, it is not necessary to rotate the intermediate rods 21, and thus it is possible to sequentially connect from the tip portion in this way. No special tools such as a wrench are required. The uppermost end of the intermediate rod is positioned lower than the upper end of the retaining member. In the case of using a hydraulic pile press-fitting and drawing machine, the upper end portion of the injection material introducing member 24 is aligned with a position lower by about 70 cm than the upper end of the earth retaining member. And the cap which prevents inflow of earth and sand is put on the uppermost end of an intermediate rod.

図８は土留め部材の側面への注入管の取り付け作業を示す斜視図である。中央面に取り付けるのと同様な手順で先端部材１を取り付ける。そして、先端部材２と中間ロッド２１ａ、２１ｂを接続部材を介して長さ方向に差し込むことによって、ワンタッチで接続する。そして、中間ロッド２１ａ、２１ｂの他端部にブレ止め部材２２を取り付ける。先端部材１およびブレ止め部材２２を土留め部材の側面に溶接する。さらに、次の中間ロッド２２を継ぎ足しながら、順次溶接して、土留め部材の側面に取り付けて行く。土留め部材の側面は傾斜しているが、中間ロッド同士の接続も、接続部材を介して長さ方向に差し込むことによって、ワンタッチで行える。ネジ式でないので中間ロッド３同士を回転する必要がないので、このように先端部から順次接続することができる。 FIG. 8 is a perspective view showing the operation of attaching the injection pipe to the side surface of the earth retaining member. The tip member 1 is attached in the same procedure as that for attaching to the center surface. And it connects by one-touch by inserting the front-end | tip member 2 and intermediate rod 21a, 21b in a length direction via a connection member. Then, the anti-blur member 22 is attached to the other end of the intermediate rods 21a and 21b. The tip member 1 and the anti-blur member 22 are welded to the side surface of the earth retaining member. Further, the next intermediate rod 22 is sequentially welded and attached to the side surface of the retaining member. Although the side surface of the earth retaining member is inclined, the intermediate rods can be connected to each other by one-touch by inserting them in the length direction via the connecting member. Since it is not a screw type, it is not necessary to rotate the intermediate rods 3, and thus it is possible to sequentially connect from the tip portion in this way.

土留め部材に注入管１を取り付けたら、地中に建て込む。油圧式杭圧入引抜機を使用してもよいが、打撃式杭打機や振動式杭打機などを使用することもできる。この場合、かなりの衝撃や振動が先端部材にも加わる。しかし、栓１２は栓移動路７の最上部に位置しているのでこれ以上は上昇できない。また、強いバネを付勢部材として使用しており、さらに栓１２は十分な長さを有するので、注入材吐出孔８が開放される位置までは容易に下がらない。栓移動路７にグリスを詰めることにより栓１２はさらに下がりにくくなっている。これにより、土留め部材の建て込み中に土砂が注入材吐出孔８より進入することが確実に防止される。 When the injection pipe 1 is attached to the earth retaining member, it is built in the ground. Although a hydraulic pile press-in / pull-out machine may be used, an impact-type pile driver, a vibration-type pile driver, or the like can also be used. In this case, considerable impact and vibration are also applied to the tip member. However, since the stopper 12 is located at the uppermost part of the stopper moving path 7, it cannot rise any further. In addition, a strong spring is used as the biasing member, and the plug 12 has a sufficient length, so that it does not easily drop to the position where the injection material discharge hole 8 is opened. By plugging the stopper moving path 7 with grease, the stopper 12 is more difficult to lower. This reliably prevents the earth and sand from entering through the injection material discharge hole 8 during the installation of the earth retaining member.

この発明の先端部材では、圧力抜き孔を通って土砂が進入しにくい構造になっている。先端部材の背面は土留め部材と表面に密着するように平坦になっている。また、先端部は正面から背面にかけて斜めに切り落とされてくさび状になっているので、土留め部材の打ち込みにおいて、先端部材を土留め部材に押しつけようとする力がかかり、土留め部材と先端部材の間に隙間が生じにくい。しかし、それでも、圧力抜き孔を通って土砂が進入する場合があった。本例では、栓移動路７にグリスを充填し、さらに圧力抜き孔に粘土を詰めて封じたので、圧力抜き孔からの土砂の流入も防止される。 The tip member of the present invention has a structure in which earth and sand do not easily enter through the pressure release hole. The back surface of the tip member is flat so as to be in close contact with the earth retaining member and the surface. In addition, since the front end portion is wedged by being cut off obliquely from the front side to the back side, when driving the earth retaining member, a force is applied to press the front end member against the earth retaining member, and the earth retaining member and the front end member are applied. It is hard to produce a gap between the two. However, there was still a case where earth and sand entered through the pressure release hole. In this example, the stopper moving path 7 is filled with grease, and the pressure relief hole is filled with clay and sealed, so that inflow of earth and sand from the pressure relief hole is also prevented.

設置する土留め部材の全てに注入管を取り付けなくてもよい。地盤における注入材の浸透のしやすさに等に応じ、たとえば、２〜６本おきに注入管付きの土留め部材を使用してもよい。こうして、工事に必要な土留め壁を形成することにより、埋設などの工事が安全に実施できる。 It is not necessary to attach the injection pipe to all of the earth retaining members to be installed. Depending on the ease of penetration of the injection material in the ground, for example, every two to six earth retaining members with injection pipes may be used. In this way, by forming the earth retaining wall necessary for the construction, construction such as burial can be safely performed.

そして、工事が終了したら、土留め部材の引く抜きを行う。最上部の注入材導入部材２４に薬液のホースを接続する。土留め部材は基本的に端から順次引き抜くが、注入管１により地中に硬化剤を注入しながら行う。この実施例では２本の独立したパイプ２１ａ、２１ｂにより独立した流路を有するので、２液性の硬化剤を使用することができる。 Then, when the construction is completed, the earth retaining member is pulled out. A chemical solution hose is connected to the uppermost injection material introduction member 24. The earth retaining member is basically sequentially pulled out from the end, and is performed while injecting a curing agent into the ground by the injection tube 1. In this embodiment, since two independent pipes 21a and 21b have independent flow paths, a two-component curing agent can be used.

土留め部材の引抜き跡を迅速に充填するためには、硬化剤としては２液を混合するゲルタイムの短いものが好ましい。
瞬結性の硬化剤の例について説明する。Ａ液として水ガラス（ＪＩＳ３号ケイ酸ナトリウム）８０リットルに水１２０リットルを加えたものを用意する。Ｂ液としては、高炉セメントＢ種に無機系懸濁型水ガラス系グラウト用硬化剤を加えたものを用意する。例えば、高炉セメントＢ種５０Ｋｇ、ＹＭＳ４５（三興コロイド化学株式会社）１０Ｋｇおよび１７８．７リットルを混合してＢ液とする。ＹＭＳ４５は硫酸カルシウムと水酸化カルシウムを主成分とする薬剤である。このＡ液とＢ液を１対１で使用することにより、また、高炉セメントＢ種５０Ｋｇ、ＹＭＳ９０（三興コロイド化学株式会社）５Ｋｇおよび１８１．４リットルを混合してＢ液とすると、２０℃でのゲルタイムが１〜２分、４週強度０．５〜１Ｎ／ｍｍ2となる。これらの硬化剤は、毒物や劇物を含まない安全性の高い無公害薬剤である。 In order to quickly fill the trace of the earth retaining member, the curing agent preferably has a short gel time for mixing two liquids.
An example of the instantaneous curing agent will be described. A liquid A is prepared by adding 80 liters of water to 80 liters of water glass (JIS No. 3 sodium silicate). As B liquid, the thing which added the hardening | curing agent for inorganic suspension water glass grout to blast furnace cement B type is prepared. For example, 50 kg of blast furnace cement type B, 10 kg of YMS45 (Sanko Colloid Chemical Co., Ltd.) and 178.7 liters are mixed to make a B liquid. YMS45 is a drug mainly composed of calcium sulfate and calcium hydroxide. By using this A liquid and B liquid on a one-to-one basis, and mixing B blast furnace cement type B 50 kg, YMS90 (Sanko Colloid Chemical Co., Ltd.) 5 kg and 181.4 liters into B liquid, The gel time at 1 to 2 minutes and 4 weeks strength 0.5 to 1 N / mm 2 . These hardeners are highly safe and non-polluting drugs that do not contain poisonous or deleterious substances.

ついで、緩結性の硬化剤の例について説明する。高炉セメントＢ種５０Ｋｇ、ベントナイト１０Ｋｇ、セメントミルク凝結硬化促進剤であるＹＭＳ２０００（三興コロイド化学株式会社）４Ｋｇおよび１７７．８リットルを混合する。これによって、流動性消失時間が３０〜４０分、４週強度０．７１Ｎ／ｍｍ2となる。 Next, an example of a slow-curing curing agent will be described. Blast furnace cement type B 50 kg, bentonite 10 kg, cement milk setting hardening accelerator YMS2000 (Sanko Colloid Chemical Co., Ltd.) 4 kg and 177.8 liters are mixed. Thus, the fluidity disappearance time is 30 to 40 minutes, and the 4-week strength is 0.71 N / mm 2 .

ホースより注入材が注入管に注入されると、注入材の圧力によって栓１２が下方向に押し下げられる。注入材の圧力は強いので、付勢部材の力に抗して栓１２を押し下げ、注入材吐出孔８が開放される。また、栓移動路７の下部には圧力抜き孔９が設けられているので、栓移動路７の中の空気やグリスは圧力抜き孔９を通って外部に排出される。したがって、栓１２はスムーズに下方へ移動し、栓移動路７の側壁に横向きに設けられた栓移動路７は確実に開放される。二つの流路を通ってきた２種類の薬液（Ａ液、Ｂ液）は先端部材１の注入材混合室で混合され、注入材吐出孔８より横向きに地中に注入される。 When the injection material is injected into the injection pipe from the hose, the stopper 12 is pushed downward by the pressure of the injection material. Since the pressure of the injection material is strong, the plug 12 is pushed down against the force of the urging member, and the injection material discharge hole 8 is opened. In addition, since the pressure release hole 9 is provided in the lower part of the stopper moving path 7, air and grease in the stopper moving path 7 are discharged to the outside through the pressure releasing hole 9. Accordingly, the stopper 12 moves smoothly downward, and the stopper movement path 7 provided laterally on the side wall of the stopper movement path 7 is reliably opened. Two types of chemical solutions (A solution and B solution) that have passed through the two flow paths are mixed in the injection material mixing chamber of the tip member 1 and injected laterally through the injection material discharge hole 8 into the ground.

先端部材１より地中に注入された注入材は、先に引き抜かれた土留め部材および注入管付き鋼矢板自体によってできる空隙を埋める。したがって、空隙に起因する地中の土壌の移動や地下水の水路の変化に伴う地盤状態の変動が発生しない。 The injection material injected into the ground from the tip member 1 fills a gap formed by the earth retaining member pulled out earlier and the steel sheet pile with injection tube itself. Therefore, there is no change in the ground condition due to the movement of soil in the ground and the change of the groundwater channel due to the gap.

引き抜きが完了したら、ホースを取り外し、次に引き抜く土留め部材に取り付ける。以下、同様の作業を繰り返して、全ての土留め部材を撤去する。 When pulling is complete, remove the hose and then attach it to the earth retaining member to be pulled out. Thereafter, the same operation is repeated to remove all the retaining members.

１．先端部材
２．上部部材
３．下部部材
４．注入材導入口
５．土留め部材接触面
６．注入材混合室
７．栓移動路
８．注入材吐出孔
９．圧力抜き孔
１０．突起部
１１．Ｏリング
１２．栓
１３．Ｏリング
１４．付勢部材
２１．中間ロッド
２２．ブレ止め部材
２３．ホース
２４．注入材導入部材 1. Tip member 2. 2. Upper member Lower member 4. 4. Injection material introduction port 5. Earth retaining member contact surface 6. Injection material mixing chamber Stopper moving path 8. 8. Injection material discharge hole Pressure relief hole 10. Projection 11. O-ring 12. Stopper 13. O-ring 14. Biasing member 21. Intermediate rod 22. Anti-blur member 23. Hose 24. Injection material introduction member

Claims (4)

平坦な土留め部材接触面と、下部に設けられたくさび状部と、上部に設けられた２以上の注入材導入口と、注入材導入口に続く注入材混合室と、注入材混合室に続く栓移動路と、栓移動路から土留め部材接触面以外の面に続く注入材吐出孔と、栓移動路の下部から土留め部材接触面に続く圧力抜き孔と、栓移動路内を上下動可能に設けられた栓と、栓に上向きの力を加える付勢部材とを有し、栓が最上部にあるときに栓が注入材吐出孔をふさぎ、栓が下がった時に栓が注入材吐出孔をふさがないようになした土留め工事用注入管の先端部材。 A flat earth retaining member contact surface, a wedge-shaped portion provided in the lower part, two or more injection material introduction ports provided in the upper part, an injection material mixing chamber following the injection material introduction port, and an injection material mixing chamber The plug movement path that follows, the injection material discharge hole that extends from the plug movement path to a surface other than the contact surface of the retaining member, the pressure release hole that extends from the lower part of the stopper movement path to the contact surface of the retaining member, and the interior of the stopper movement path It has a movable stopper and an urging member that applies an upward force to the stopper. When the stopper is at the top, the stopper blocks the injection material discharge hole, and when the stopper is lowered, the stopper becomes the injection material. A tip member of an injection pipe for earth retaining work that does not block the discharge hole. 栓は概ね円柱状であり、栓にはＯリングが設けられている請求項１に記載の土留め工事用注入管の先端部材。 The tip member of the injection pipe for earth retaining work according to claim 1, wherein the stopper is substantially cylindrical, and the stopper is provided with an O-ring. 請求項１または請求項２に記載の土留め工事用注入管の先端部材を使用して注入材を注入して抜き跡を充填しながら土留め部材を引き抜く土留め工法であり、
栓より下側の栓移動路栓移動路にグリスを充填し、注入材吐出孔と圧力抜き孔に粘土を外側から詰め、平坦な土留め部材接触面を土留め部材に当てるようにして土留め部材の下端部に取り付け、さらに注入材導入口に注入管を接続し、この土留め部材を施工場所に打ち込んで土留め壁を形成し、
施工後には注入管で先端部材に注入材を送り込み、先端部材の注入材吐出孔より注入材を地中に注入して土留め部材の引抜き跡を充填しながら土留め部材を撤去する土留め工法。 The earth retaining method of pulling out the earth retaining member while injecting the injecting material and filling the trace using the tip member of the earth retaining construction injection pipe according to claim 1 or claim 2,
Fill the stopper movement path below the stopper with grease, fill the injection material discharge hole and the pressure release hole with clay from the outside, and hold the earth retaining member so that the flat retaining member contact surface touches the retaining member. Attach to the lower end of the member, connect the injection pipe to the injection material introduction port, drive this earth retaining member into the construction site to form the earth retaining wall,
After the construction, the earth retaining method is to remove the earth retaining member while feeding the material into the tip member with the injection pipe, injecting the injecting material into the ground from the injection material discharge hole of the tip member and filling the extraction trace of the earth retaining member. . 土留め部材の表面に万力を溶接し、この万力によって先端部材を土留め部材に固定し、溶接によって先端部材を土留め部材に仮留めし、万力を土留め部材から取り外した後に溶接によって先端部材を土留め部材を最終的に固定する請求項３に記載の土留め工法。 A vise is welded to the surface of the earth retaining member, the tip member is fixed to the earth retaining member by this vise, the tip member is temporarily secured to the earth retaining member by welding, and the vise is removed from the earth retaining member before welding. The earth retaining method according to claim 3, wherein the earth retaining member is finally fixed by the tip member.
JP2013263132A 2013-12-19 2013-12-19 Earth retaining method Active JP6273603B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013263132A JP6273603B2 (en) 2013-12-19 2013-12-19 Earth retaining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013263132A JP6273603B2 (en) 2013-12-19 2013-12-19 Earth retaining method

Publications (2)

Publication Number Publication Date
JP2015117551A true JP2015117551A (en) 2015-06-25
JP6273603B2 JP6273603B2 (en) 2018-02-07

Family

ID=53530538

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013263132A Active JP6273603B2 (en) 2013-12-19 2013-12-19 Earth retaining method

Country Status (1)

Country Link
JP (1) JP6273603B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102644674B1 (en) * 2023-02-14 2024-03-08 주식회사 도영이앤지 Failure section detection system of underground distribution line and its installation method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008101373A (en) * 2006-10-18 2008-05-01 Shinichi Yamashita Hardening agent filling pipe for earth retaining construction work and earth retaining construction method
JP2010248780A (en) * 2009-04-15 2010-11-04 Nippon Steel Corp Water area structure using sea bed ground driving member
JP2011236637A (en) * 2010-05-10 2011-11-24 Shinichi Yamashita Removal method of earth retaining member and slope strengthening block installation method using the same
JP2012026216A (en) * 2010-07-27 2012-02-09 Shimizu Corp Injection mechanism of hardening material
JP2013036280A (en) * 2011-08-10 2013-02-21 Shinichi Yamashita Method for removing earth retaining member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008101373A (en) * 2006-10-18 2008-05-01 Shinichi Yamashita Hardening agent filling pipe for earth retaining construction work and earth retaining construction method
JP2010248780A (en) * 2009-04-15 2010-11-04 Nippon Steel Corp Water area structure using sea bed ground driving member
JP2011236637A (en) * 2010-05-10 2011-11-24 Shinichi Yamashita Removal method of earth retaining member and slope strengthening block installation method using the same
JP2012026216A (en) * 2010-07-27 2012-02-09 Shimizu Corp Injection mechanism of hardening material
JP2013036280A (en) * 2011-08-10 2013-02-21 Shinichi Yamashita Method for removing earth retaining member

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102644674B1 (en) * 2023-02-14 2024-03-08 주식회사 도영이앤지 Failure section detection system of underground distribution line and its installation method

Also Published As

Publication number Publication date
JP6273603B2 (en) 2018-02-07

Similar Documents

Publication Publication Date Title
JP5990214B2 (en) Reinforcement method of hole wall in construction method of cast-in-place concrete pile.
JP5635804B2 (en) Method for removing earth retaining member and method for installing slope reinforcing block using the same
JP2010013858A (en) Anchoring method for shear reinforcement material
KR101045625B1 (en) Construction method of retaining wall using cast-in-place pile
JP4897985B2 (en) Hardener injection pipe for earth retaining work and earth retaining method
JP6273603B2 (en) Earth retaining method
JP5840891B2 (en) Removal method of retaining members
KR20180039891A (en) A Environment-Friendly construction method of drainage channel on softground by Grouting and Mixing of Solidifying Agent
KR102134603B1 (en) Apparatus and method for constructing non-open cut structure
JP2014202007A (en) Earth retaining wall and construction method for the same
JP3940735B2 (en) Earth retaining method
JP6361045B2 (en) Removal method of earth retaining members
CN103790162B (en) Synchronous mode steel sheet pile stake holes filling device
JP6340248B2 (en) Mountain retaining wall, how to construct a mountain retaining wall
JP2009068203A (en) Earth retaining wall composed of horizontal sheathing with soldier beam, and cut-off structure, construction method and cut-off method for the earth retaining wall
JP4905296B2 (en) Method for constructing retaining wall and retaining wall
JP2009144353A (en) Discharge sludge pit
JP6615494B2 (en) Removal method of retaining members
JPH0813495A (en) Earth retaining wall and method thereof
KR101734781B1 (en) Earth retaining self-reliance structure and earth retaining construction method using it
JP6206899B2 (en) Earth retaining pipe for reaching mine and underground pipe construction method using the same
KR102137200B1 (en) construction method of soil retaining wall using square steel pipe
JP3923482B2 (en) Underground conduit construction method
KR20090128084A (en) Jacket installing process of jacket facility structure using r.c.d. reamming bit for excavating enlarged hole in the earth
JP2016180233A (en) Water cutoff device used in micro pile method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20161006

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170823

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20171002

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20171124

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: 20171204

R150 Certificate of patent or registration of utility model

Ref document number: 6273603

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250