JP4206442B1 - Earth anchor with rotating blades and its construction method - Google Patents

Earth anchor with rotating blades and its construction method Download PDF

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JP4206442B1
JP4206442B1 JP2007228417A JP2007228417A JP4206442B1 JP 4206442 B1 JP4206442 B1 JP 4206442B1 JP 2007228417 A JP2007228417 A JP 2007228417A JP 2007228417 A JP2007228417 A JP 2007228417A JP 4206442 B1 JP4206442 B1 JP 4206442B1
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blade
shaft tube
ground
diameter shaft
steel wire
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JP2009057806A (en
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好隆 服部
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株式会社小笠原設計
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Abstract

【課題】プレボーリングすること無しに、低廉で、大きな耐力を有することができるアースアンカーを提供する。
【解決手段】羽根１は、回転できるように軸管３の中に格納し、羽根と軸管は直交する回転軸４で接合する。軸管の幅は、羽根の厚みと同じで、先端部に羽根が概略９０度回転した時羽根の回転を止める止め部を有する。外径軸管７には、鋼線５と連結した連結金物６が被せられる。外径軸管の内部側の爪８を、連結金物の上面の爪孔９に差し込んで、アースアンカー２と外径軸管を接合する。アースアンカーの貫入時、外径軸管の先端は、羽根の連結金物側の先端と接し、アースアンカーが所定の位置に達した時点で、外径軸管を引いて爪をはずし連結金物を軸にし９０度回転し、押し込んで羽根を開くと共に鋼線に引張力を掛け、羽根を概略９０度回転させ、その後外径軸管を抜き取る。
【選択図】図１Provided is an earth anchor that is inexpensive and can have a large proof strength without pre-boring.
A blade 1 is housed in a shaft tube 3 so as to be rotatable, and the blade and the shaft tube are joined by a rotating shaft 4 orthogonal to the blade. The width of the shaft tube is the same as the thickness of the blade, and has a stop portion that stops rotation of the blade when the blade is rotated approximately 90 degrees at the tip. The outer diameter shaft tube 7 is covered with a connecting hardware 6 connected to the steel wire 5. The claw 8 on the inner side of the outer diameter shaft tube is inserted into the claw hole 9 on the upper surface of the connecting hardware, and the earth anchor 2 and the outer diameter shaft tube are joined. When the earth anchor penetrates, the tip of the outer diameter shaft tube comes into contact with the tip of the blade on the connection hardware side. When the earth anchor reaches a predetermined position, the outer diameter shaft tube is pulled to remove the claw, and the connection hardware is pivoted. Then, the blades are pushed in to open the blades, and a tensile force is applied to the steel wire to rotate the blades approximately 90 degrees, and then the outer diameter shaft tube is pulled out.
[Selection] Figure 1

Description

本発明は、地盤上に構造物等と地盤を結合させるための回転羽根付アースアンカーとその工法に関するものである。   The present invention relates to a ground anchor with rotating blades for connecting a structure or the like to the ground on the ground, and a method for the same.

地中に貫入して所定の位置に達した後、引張力等を掛け羽根を開きアースアンカーとする技術を提案した。（特許文献１）
特開２００６−２８７０８１ After penetrating into the ground and reaching a predetermined position, a technique was proposed in which a tensile force or the like was applied to open the blades to make an earth anchor. (Patent Document 1)
JP 2006-287081

特許文献１では、羽根（２４）はＹ字柱（２３）に片持梁的についており、羽根（２４）とピンボルト（２５）に相当の力が働く。もし、アースアンカーの羽が開いた時、回転軸を中心にして左右または上下に概略同じ長さで一体につくることができれば、左右または上下の羽根に働く力が相殺し合って、アースアンカーにより大きな力の負担をさせることが可能である。   In Patent Document 1, the blade (24) is attached to the Y-shaped column (23) like a cantilever, and a considerable force acts on the blade (24) and the pin bolt (25). If the wings of the earth anchor open, if they can be made integrally with the same length on the left and right or top and bottom around the rotation axis, the forces acting on the left and right or top and bottom wings will cancel each other, It is possible to load a large force.

特許文献１では、アースアンカーの先端部を、プレボーリングなしでも貫入できるよう、ねじ切り加工しているのでコストはその分高くつく。   In Patent Document 1, since the tip of the earth anchor is threaded so that it can penetrate without pre-boring, the cost increases accordingly.

プレボーリング後または直接貫入して所定の位置に到達した後引張力を掛け、羽根（１）を開き地中に係止させる回転羽根付アースアンカーにおいて、羽根（１）が回転できるように、羽根（１）を、軸管（３）内に軸管（３）と直交する回転軸（４）で軸管（３）と接合し、軸管（３）の、羽根（１）が回転する側を、羽根（１）の厚みと同じ巾で、羽根（１）が概略９０度回転した時点で羽根（１）の回転を止めるように、羽根止部を残した長さで切除し、軸管（３）の回転軸から先端までの長さも前記先端部羽根止部の所定の長さを持った長さとし、また、羽根（１）の回転軸（４）からの長さをアースアンカー先端側、その反対側をそれぞれａ、ｂとすると、ａ＜ｂとし、羽根（１）の回転方向側の面とそれと交差する面の角度は概略４５度または概略１３５度とし、軸管（３）の先端部と反対側に、鋼線（５）と連結した連結金物（６）を取り付け、アースアンカー（２）を所定の位置まで貫入すべく連結金物（６）を、鋼線（５）も含めて被して接合される外径軸管（７）の内部側に取り付けられた下向きの爪（８）を差し込めるようにその上面に爪孔（９）を設け、アースアンカー（２）を所定の位置に到達した時点で、外径軸管（７）を引いて前記爪（８）をはずし、外径軸管（７）を９０度回転して下げ戻しても爪（８）が連結金物（６）に当たらないようにその形状を平面視Ｉ型とし、外径軸管（７）を押し込んで羽根（１）を開くと共に、鋼線（３）に引張力を掛け、羽根（１）を前記羽根止部に当たるまで概略９０度回転させ、その後外径軸管（７）を抜き取り、鋼線（５）と地上の構造物等と連結することによって、構造物等と地盤を結合し、使用後は、外径軸管（７）を、鋼線（５）を内にいれて貫入して爪（８）をアースアンカー（２）の爪孔（９）に差込み、圧入して羽根（１）を回転、軸管（３）内に長さaの羽根の先端部以外を収納し、鋼線（５）に引張力を掛けて抜き取り、再使用することもできる。以上を特徴とする回転羽根付アースアンカーである。 In a ground anchor with a rotating blade that applies a tensile force after pre-boring or directly penetrates and reaches a predetermined position and locks the blade (1) in the open ground, the blade (1) can be rotated. (1) is joined to the shaft tube (3) in the shaft tube (3) with a rotating shaft (4) orthogonal to the shaft tube (3), and the side of the shaft tube (3) on which the blade (1) rotates. Is cut with a length that leaves the blade stopper so that the rotation of the blade (1) stops when the blade (1) rotates approximately 90 degrees with the same width as the thickness of the blade (1). The length from the rotation shaft to the tip of (3) is also a length having a predetermined length of the tip blade stop , and the length of the blade (1) from the rotation shaft (4) is the tip side of the earth anchor If the opposite sides are a and b, respectively, a <b, and the angle between the surface of the blade (1) in the rotational direction and the surface intersecting with it is approximately And 45 degrees or outline 135 degrees, on the opposite side of the distal end portion of the shaft tube (3), fitted with coupling hardware (6) which is connected to the steel wire (5), in order to penetrate the ground anchor (2) to the predetermined position A nail on its upper surface so that a downward claw (8) attached to the inner side of the outer diameter shaft pipe (7) to be joined with the connecting metal fitting (6) including the steel wire (5) can be inserted. When the hole (9) is provided and the earth anchor (2) reaches a predetermined position, the outer diameter shaft tube (7) is pulled to remove the claw (8), and the outer diameter shaft tube (7) is rotated 90 degrees. In order to prevent the claws (8) from coming into contact with the connecting hardware (6) even if they are rotated back down, the shape is made into an I shape in plan view, the outer diameter shaft tube (7) is pushed in to open the blade (1), and the steel multiplying the tensile force in the line (3), disconnect rotated schematic 90 ° until it touches the vane (1) to the blade stop portion, then the outside diameter shaft tube (7) Taken by concatenating steel wire (5) and the ground structure such as bonded structures such as the ground, after use, the outer-diameter shaft tube (7), placed in the inner steel wire (5) And insert the claw (8) into the claw hole (9) of the earth anchor (2), press-fitting and rotate the blade (1), and the shaft tube (3) other than the tip of the blade of length a The steel wire (5) can be housed, extracted by applying a tensile force, and reused. This is an earth anchor with rotating blades characterized by the above.

前記回転羽根付アースアンカー（２）の先端に、その平面視断面がＩ字型をしたＩ字錐（１０）でねじ切り加工（１１）をした先端部（１２）を取り付け、前記回転羽根付アースアンカー（２）を回転しながら地中等に貫入していくことを特徴とする請求項１記載の回転羽根付アースアンカーである。 A tip end portion (12) threaded (11) with an I-shaped cone (10) having a I-shaped cross section in plan view is attached to the tip end of the earth anchor (2) with the rotary blade, The earth anchor with rotating blades according to claim 1, wherein the anchor (2) penetrates into the ground while rotating.

請求項１または２記載の回転羽根付アースアンカー（２）を用いて、プレボーリング後または直接貫入して所定の位置に到達した後引張力を掛け、羽根（１）を開き地中に係止させる回転羽根付アースアンカーの工法において、前記回転羽根付アースアンカー（２）を所定の位置まで貫入すべく連結金物（６）を、鋼線（５）も含めて外径軸管（７）で被し、外径軸管（７）の内部側に取り付けられた下向きの爪（８）を、前記連結金物（６）の上面にあけられた爪孔（９）に差し込んで、回転羽根付アースアンカー（２）と外径軸管（７）を接合し、回転羽根付アースアンカー（２）の貫入時、外径軸管（７）の先端を、前記羽根（１）の長さｂ側の先端に接し、回転羽根付アースアンカー（２）が所定の位置に到達した時点で、外径軸管（７）を引いて前記爪（８）をはずし、外径軸管（７）を下げ戻しても爪（８）が連結金物（６）に当たらないように、連結金物（６）を軸にして９０度回転、押し込んで羽根（１）を開くと共に、鋼線（５）に引張力を掛け、羽根（１）を羽根止部に当たるまで概略９０度回転させ、その後外径軸管（７）を抜き取り、鋼線（５）と地上の構造物等と連結することによって、構造物等と地盤を結合する。使用後は、外径軸管（７）を、鋼線（５）を内にいれて貫入して爪（８）を回転羽根付アースアンカー（２）の爪孔（９）に差込み、圧入して羽根（１）を回転、軸管（３）内に長さaの羽根の先端部以外を収納し、鋼線（５）に引張力を掛けて回転羽根付アースアンカー（２）を抜き取り、再使用することもできる。以上を特徴とする回転羽根付アースアンカーの工法である。 Using the earth anchor (2) with rotating blades according to claim 1 or 2, after pre-boring or directly penetrating and reaching a predetermined position, a tensile force is applied to lock the blade (1) in the open ground. In the construction method of the earth anchor with rotating blades, the outer metal shaft pipe (7) including the steel wire (5) is connected to the ground anchor (2) including the steel wire (5) in order to penetrate the earth anchor with rotating blade (2) to a predetermined position. Put the downward claw (8) attached to the inner side of the outer diameter shaft tube (7) into the claw hole (9) opened in the upper surface of the connection metal fitting (6), and ground with a rotating blade When the anchor (2) and the outer diameter shaft pipe (7) are joined and the earth anchor (2) with rotating blades penetrates, the tip of the outer diameter shaft tube (7) is connected to the length b side of the blade (1). tip in contact, when the ground anchor with rotating blade (2) has reached a predetermined position, the outer-diameter shaft tube 7) the Remove claw (8) by pulling, as nails back down the outer-diameter shaft tube (7) (8) does not hit the connection hardware (6), by connecting hardware (6) in the axial Rotate 90 degrees, push in to open the blade (1), apply tensile force to the steel wire (5), rotate the blade (1) approximately 90 degrees until it hits the blade stop , and then rotate the outer diameter shaft tube (7) The structure and the ground are joined by extracting and connecting the steel wire (5) to the structure and the like on the ground. After use, insert the outer diameter shaft tube (7) with the steel wire (5) inside and insert the claw (8) into the claw hole (9) of the earth anchor (2) with rotating blades. Rotate the blade (1), store the tip of the blade of length a in the axial tube (3), apply a tensile force to the steel wire (5), and pull out the ground anchor (2) with the rotating blade, It can be reused. This is a construction method of the earth anchor with rotating blades characterized by the above .

本発明のアースアンカーは、その貫入においては、地質調査用の小型軽量ボーリングマシーン（道路の無い山野などの傾斜地にも搬入可）で良く、引張力をかけるにおいては、例えば、大地が反力になるように、３角錐状単位架構を組み（下弦材は無くとも良い）、チェンブロックなどで引張力をかけることができる。グラウト材の注入も必要が無い。従って自然環境を痛めることは無い。   The earth anchor of the present invention may be a small and light boring machine for geological surveys (can be carried on slopes such as mountains without roads) for intrusion. Thus, a triangular pyramid-shaped unit frame can be assembled (the lower chord material is not necessary), and a tensile force can be applied with a chain block or the like. No grout injection is required. Therefore, it does not hurt the natural environment.

小規模なアースアンカーとして使用する時は、プレボーリングなしで、外径軸管上部をハンマーなどで打撃するだけでアースアンカーを所定の位置に貫入させることができる。   When used as a small-scale earth anchor, the earth anchor can be inserted into a predetermined position by simply hitting the upper part of the outer diameter shaft tube with a hammer or the like without pre-boring.

羽根（１）が９０度回転した後、鋼線（５）に引張力がかかると、羽根（１）のｂまたはａの長さの羽根によってかかる力のモーメントの差が軸管（３）の羽根止部に負荷される。羽根の耐力をそれ以上にすることは容易である。従って、本発明のアースアンカーは、文献１のアースアンカーよりも、同程度の大きさにおいて、大きな耐力を保有することが可能である。また、コストも安くつき、再使用も出来る。   After the blade (1) is rotated 90 degrees, when a tensile force is applied to the steel wire (5), the difference in the moment of force applied by the blade of length b or a of the blade (1) is different from that of the axial tube (3). Loaded on the blade stop. It is easy to increase the proof strength of the blade. Therefore, the earth anchor of the present invention can have a greater proof strength in the same size as the earth anchor of Document 1. In addition, the cost is low and it can be reused.

以下、発明を図示する実施形態に基づいて説明する。図１の（１）〜（３）は、本発明アースアンカーの断面図、図２の（１）は図１の（３）の正面図、図２の（２）、（３）は図２（１）の側面図である。図３の（１）、（２）、（３）はそれぞれ図１のＡ−Ａ断面図、Ｂ−Ｂ断面図、Ｃ−Ｃ断面図である。図４の（１）、（２）、（３）はそれぞれ図１のＤ−Ｄ断面図、Ｅ−Ｅ断面図、Ｆ−Ｆ断面図である。図５の（１）〜（３）は、羽根１の回転方向側の面とそれと交差する面の角度を概略１３５度にした場合のアースアンカー（２）の断面図である。プレボーリング後または直接貫入して所定の位置に到達した後引張力を掛け、羽根（１）を開き地中に係止させる回転羽根付アースアンカーにおいて、羽根（１）が回転できるように、羽根（１）を、軸管（３）内に軸管（３）と直交する回転軸（４）で軸管（３）と接合し、軸管（３）の、羽根（１）が回転する側を、羽根（１）の厚みと同じ巾で、羽根（１）が概略９０度回転した時点で羽根（１）の回転を止めるように、羽根止部を残した長さで切除し、軸管（３）の回転軸から先端までの長さも前記先端部羽根止部の所定の長さを持った長さとし、また、羽根（１）の回転軸（４）からの長さをアースアンカー先端側、その反対側をそれぞれａ、ｂとすると、ａ＜ｂとし、羽根（１）の回転方向側の面とそれと交差する面の角度は概略４５度または概略１３５度とし、軸管（３）の先端部と反対側に、鋼線（５）と連結した連結金物（６）を取り付け、アースアンカー（２）を所定の位置まで貫入すべく連結金物（６）を、鋼線（５）も含めて被して接合される外径軸管（７）の内部側に取り付けられた下向きの爪（８）を差し込めるようにその上面に爪孔（９）を設け、アースアンカー（２）を所定の位置に到達した時点で、外径軸管（７）を引いて前記爪（８）をはずし、外径軸管（７）を９０度回転して下げ戻しても爪（８）が連結金物（６）に当たらないようにその形状を平面視Ｉｍ型とし、外径軸管（７）を押し込んで羽根（１）を開くと共に、鋼線（３）に引張力を掛け、羽根（１）を前記羽根止部に当たるまで概略９０度回転させ、その後外径軸管（７）を抜き取り、鋼線（５）と地上の構造物等と連結することによって、構造物等と地盤を結合し、使用後は、外径軸管（７）を、鋼線（５）を内にいれて貫入して爪（８）をアースアンカー（２）の爪孔（９）に差込み、圧入して羽根（１）を回転、軸管（３）内に長さaの羽根の先端部以外を収納し、鋼線（５）に引張力を掛けて抜き取り、再使用することもできる。以上を特徴とする回転羽根付アースアンカーである。 Hereinafter, the present invention will be described based on illustrated embodiments. 1 (1) to (3) are cross-sectional views of the earth anchor of the present invention, FIG. 2 (1) is a front view of FIG. 1 (3), and FIGS. 2 (2) and 2 (3) are FIG. It is a side view of (1). (1), (2), and (3) of FIG. 3 are AA sectional drawing, BB sectional drawing, and CC sectional drawing of FIG. 1, respectively. (1), (2), and (3) of FIG. 4 are DD sectional drawing, EE sectional drawing, and FF sectional drawing of FIG. 1, respectively. (1)-(3) of FIG. 5 is sectional drawing of the earth anchor (2) at the time of making the angle of the surface of the rotation direction side of the blade | wing 1 and the surface which cross | intersect it into about 135 degree | times. In a ground anchor with a rotating blade that applies a tensile force after pre-boring or directly penetrates and reaches a predetermined position and locks the blade (1) in the open ground, the blade (1) can be rotated. (1) is joined to the shaft tube (3) in the shaft tube (3) with a rotating shaft (4) orthogonal to the shaft tube (3), and the side of the shaft tube (3) on which the blade (1) rotates. Is cut with a length that leaves the blade stopper so that the rotation of the blade (1) stops when the blade (1) rotates approximately 90 degrees with the same width as the thickness of the blade (1). The length from the rotation shaft to the tip of (3) is also a length having a predetermined length of the tip blade stop , and the length of the blade (1) from the rotation shaft (4) is the tip side of the earth anchor If the opposite sides are a and b, respectively, a <b, and the angle between the surface of the blade (1) in the rotational direction and the surface intersecting with it is approximately And 45 degrees or outline 135 degrees, on the opposite side of the distal end portion of the shaft tube (3), fitted with coupling hardware (6) which is connected to the steel wire (5), in order to penetrate the ground anchor (2) to the predetermined position A nail on its upper surface so that a downward claw (8) attached to the inner side of the outer diameter shaft pipe (7) to be joined with the connecting metal fitting (6) including the steel wire (5) can be inserted. When the hole (9) is provided and the earth anchor (2) reaches a predetermined position, the outer diameter shaft tube (7) is pulled to remove the claw (8), and the outer diameter shaft tube (7) is rotated 90 degrees. In order to prevent the claw (8) from coming into contact with the connecting hardware (6) even if it is rotated back down, its shape is Im type in plan view, and the outer diameter shaft tube (7) is pushed in to open the blade (1), and the steel multiplying the tensile force in the line (3), is rotated schematic 90 ° until it touches the vane (1) to the blade stop portion, then the outside diameter shaft tube (7) Up can, by connecting the steel wire (5) and the ground structure such as bonded structures such as the ground, after use, the outer-diameter shaft tube (7), the inner steel wire (5) Insert the nail (8) into the nail hole (9) of the earth anchor (2), press-fit and rotate the vane (1), except for the tip of the vane of length a in the axial tube (3) Can be stored and removed by applying a tensile force to the steel wire (5). This is an earth anchor with rotating blades characterized by the above.

図６の（１）、（２）、（３）はそれぞれアースアンカー（２）の正面図、側面図、（２）のＧ−Ｇ断面図である。前記回転羽根付アースアンカー（２）の先端に、その平面視断面がＩ字型をしたＩ字錐（１０）でねじ切り加工（１１）をした先端部（１２）を取り付け、前記回転羽根付アースアンカー（２）を回転しながら地中等に貫入していくことを特徴とする。   (1), (2), and (3) in FIG. 6 are a front view, a side view, and a GG sectional view of (2), respectively, of the earth anchor (2). A tip end portion (12) threaded (11) with an I-shaped cone (10) having a I-shaped cross section in plan view is attached to the tip end of the earth anchor (2) with the rotary blade, It is characterized by penetrating into the ground while rotating the anchor (2).

請求項１または２記載の回転羽根付アースアンカー（２）を用いて、プレボーリング後または直接貫入して所定の位置に到達した後引張力を掛け、羽根（１）を開き地中に係止させる回転羽根付アースアンカーの工法において、前記回転羽根付アースアンカー（２）を所定の位置まで貫入すべく連結金物（６）を、鋼線（５）も含めて外径軸管（７）で被し、外径軸管（７）の内部側に取り付けられた下向きの爪（８）を、前記連結金物（６）の上面にあけられた爪孔（９）に差し込んで、回転羽根付アースアンカー（２）と外径軸管（７）を接合し、回転羽根付アースアンカー（２）の貫入時、外径軸管（７）の先端を、前記羽根（１）の長さｂ側の先端に接し、回転羽根付アースアンカー（２）が所定の位置に到達した時点で、外径軸管（７）を引いて前記爪（８）をはずし、外径軸管（７）を下げ戻しても爪（８）が連結金物（６）に当たらないように、連結金物（６）を軸にして９０度回転、押し込んで羽根（１）を開くと共に、鋼線（５）に引張力を掛け、羽根（１）を羽根止部に当たるまで概略９０度回転させ、その後外径軸管（７）を抜き取り、鋼線（５）と地上の構造物等と連結することによって、構造物等と地盤を結合する。使用後は、外径軸管（７）を、鋼線（５）を内にいれて貫入して爪（８）を回転羽根付アースアンカー（２）の爪孔（９）に差込み、圧入して羽根（１）を回転、軸管（３）内に長さaの羽根の先端部以外を収納し、鋼線（５）に引張力を掛けて回転羽根付アースアンカー（２）を抜き取り、再使用することもできる。以上を特徴とする回転羽根付アースアンカーの工法である。 Using the earth anchor (2) with rotating blades according to claim 1 or 2, after pre-boring or directly penetrating and reaching a predetermined position, a tensile force is applied to lock the blade (1) in the open ground. In the construction method of the earth anchor with rotating blades, the outer metal shaft pipe (7) including the steel wire (5) is connected to the ground anchor (2) including the steel wire (5) in order to penetrate the earth anchor with rotating blade (2) to a predetermined position. Put the downward claw (8) attached to the inner side of the outer diameter shaft tube (7) into the claw hole (9) opened in the upper surface of the connection metal fitting (6), and ground with a rotating blade When the anchor (2) and the outer diameter shaft pipe (7) are joined and the earth anchor (2) with rotating blades penetrates, the tip of the outer diameter shaft tube (7) is connected to the length b side of the blade (1). tip in contact, when the ground anchor with rotating blade (2) has reached a predetermined position, the outer-diameter shaft tube 7) the Remove claw (8) by pulling, as nails back down the outer-diameter shaft tube (7) (8) does not hit the connection hardware (6), by connecting hardware (6) in the axial Rotate 90 degrees, push in to open the blade (1), apply tensile force to the steel wire (5), rotate the blade (1) approximately 90 degrees until it hits the blade stop , and then rotate the outer diameter shaft tube (7) The structure and the ground are joined by extracting and connecting the steel wire (5) to the structure and the like on the ground. After use, insert the outer diameter shaft tube (7) with the steel wire (5) inside and insert the claw (8) into the claw hole (9) of the earth anchor (2) with rotating blades. Rotate the blade (1), store the tip of the blade of length a in the axial tube (3), apply a tensile force to the steel wire (5), and pull out the ground anchor (2) with the rotating blade, It can be reused. This is a construction method of the earth anchor with rotating blades characterized by the above.

（１）〜（３）は、回転羽根付アースアンカーの断面図。(1)-(3) is sectional drawing of a ground anchor with a rotary blade. （１）は、図１（３）の正面図。（２）は、図２（１）の側面図。（３）は、図２（１）の側面図。(1) is a front view of FIG. 1 (3). (2) is a side view of FIG. 2 (1). (3) is a side view of FIG. （１）は、図１（１）のＡ−Ａ断面図。（２）は、図１（１）のＢ−Ｂ断面図。（３）は、図１（１）のＣ−Ｃ断面図。(1) is AA sectional drawing of FIG. 1 (1). (2) is BB sectional drawing of FIG. 1 (1). (3) is CC sectional drawing of FIG. 1 (1). （１）は、図１（２）のＤ−Ｄ断面図。（２）は、図１（３）のＥ−Ｅ断面図。（３）は、図１（３）のＦ−Ｆ断面図。(1) is DD sectional drawing of FIG. 1 (2). (2) is EE sectional drawing of FIG. 1 (3). (3) is FF sectional drawing of FIG. 1 (3). （１）〜（３）は、回転羽根付アースアンカーの断面図。(1)-(3) is sectional drawing of a ground anchor with a rotary blade. （１）は、別な回転羽根付アースアンカーの正面図。（２）は、別な回転羽根付アースアンカーの側面図。（３）は、（２）のＧ−Ｇ断面図。(1) is a front view of another earth anchor with rotating blades. (2) is a side view of another earth anchor with rotating blades. (3) is a GG sectional view of (2).

符号の説明Explanation of symbols

１ 羽根
２ 回転羽根付アースアンカー
３ 軸管
４ 回転軸
５ 鋼線
６ 連結金物
７ 外径軸管
８ 爪
９ 爪孔
１０ Ｉ字錐
１１ ねじ切り加工
１２ 先端部
１３ ナット
１４ 座金 DESCRIPTION OF SYMBOLS 1 blade | wing 2 earth anchor with rotary blade 3 shaft tube 4 rotating shaft 5 steel wire 6 connection metal 7 outer diameter shaft tube 8 claw 9 claw hole 10 I-shaped cone 11 threading 12 tip part 13 nut 14 washer

Claims (3)

プレボーリング後または直接貫入して所定の位置に到達した後引張力を掛け、羽根（１）を開き地中に係止させる回転羽根付アースアンカーにおいて、羽根（１）が回転できるように、羽根（１）を、軸管（３）内に軸管（３）と直交する回転軸（４）で軸管（３）と接合し、軸管（３）の、羽根（１）が回転する側を、羽根（１）の厚みと同じ巾で、羽根（１）が概略９０度回転した時点で羽根（１）の回転を止めるように、羽根止部を残した長さで切除し、軸管（３）の回転軸から先端までの長さも前記先端部羽根止部の所定の長さを持った長さとし、また、羽根（１）の回転軸（４）からの長さをアースアンカー先端側、その反対側をそれぞれａ、ｂとすると、ａ＜ｂとし、羽根（１）の回転方向側の面とそれと交差する面の角度は概略４５度または概略１３５度とし、軸管（３）の先端部と反対側に、鋼線（５）と連結した連結金物（６）を取り付け、アースアンカー（２）を所定の位置まで貫入すべく連結金物（６）を、鋼線（５）も含めて被して接合される外径軸管（７）の内部側に取り付けられた下向きの爪（８）を差し込めるようにその上面に爪孔（９）を設け、アースアンカー（２）を所定の位置に到達した時点で、外径軸管（７）を引いて前記爪（８）をはずし、外径軸管（７）を９０度回転して下げ戻しても爪（８）が連結金物（６）に当たらないようにその形状を平面視Ｉ型とし、外径軸管（７）を押し込んで羽根（１）を開くと共に、鋼線（３）に引張力を掛け、羽根（１）を前記羽根止部に当たるまで概略９０度回転させ、その後外径軸管（７）を抜き取り、鋼線（５）と地上の構造物等と連結することによって、構造物等と地盤を結合し、使用後は、外径軸管（７）を、鋼線（５）を内にいれて貫入して爪（８）をアースアンカー（２）の爪孔（９）に差込み、圧入して羽根（１）を回転、軸管（３）内に長さaの羽根の先端部以外を収納し、鋼線（５）に引張力を掛けて抜き取り、再使用もできることを特徴とする回転羽根付アースアンカー。 In a ground anchor with a rotating blade that applies a tensile force after pre-boring or directly penetrates and reaches a predetermined position and locks the blade (1) in the open ground, the blade (1) can be rotated. (1) is joined to the shaft tube (3) in the shaft tube (3) with a rotating shaft (4) orthogonal to the shaft tube (3), and the side of the shaft tube (3) on which the blade (1) rotates. Is cut with a length that leaves the blade stopper so that the rotation of the blade (1) stops when the blade (1) rotates approximately 90 degrees with the same width as the thickness of the blade (1). The length from the rotation shaft to the tip of (3) is also a length having a predetermined length of the tip blade stop , and the length of the blade (1) from the rotation shaft (4) is the tip side of the earth anchor If the opposite sides are a and b, respectively, a <b, and the angle between the surface of the blade (1) in the rotational direction and the surface intersecting with it is approximately And 45 degrees or outline 135 degrees, on the opposite side of the distal end portion of the shaft tube (3), fitted with coupling hardware (6) which is connected to the steel wire (5), in order to penetrate the ground anchor (2) to the predetermined position A nail on its upper surface so that a downward claw (8) attached to the inner side of the outer diameter shaft pipe (7) to be joined with the connecting metal fitting (6) including the steel wire (5) can be inserted. When the hole (9) is provided and the earth anchor (2) reaches a predetermined position, the outer diameter shaft tube (7) is pulled to remove the claw (8), and the outer diameter shaft tube (7) is rotated 90 degrees. In order to prevent the claws (8) from coming into contact with the connecting hardware (6) even if they are rotated back down, the shape is made into an I shape in plan view, the outer diameter shaft tube (7) is pushed in to open the blade (1), and the steel multiplying the tensile force in the line (3), disconnect rotated schematic 90 ° until it touches the vane (1) to the blade stop portion, then the outside diameter shaft tube (7) Taken by concatenating steel wire (5) and the ground structure such as bonded structures such as the ground, after use, the outer-diameter shaft tube (7), placed in the inner steel wire (5) And insert the claw (8) into the claw hole (9) of the earth anchor (2), press-fitting and rotate the blade (1), and the shaft tube (3) other than the tip of the blade of length a An earth anchor with rotating blades that can be stored, extracted by applying a tensile force to the steel wire (5), and reusable. 前記回転羽根付アースアンカー（２）の先端に、その平面視断面がＩ字型をしたＩ字錐（１０）でねじ切り加工（１１）をした先端部（１２）を取り付け、前記回転羽根付アースアンカー（２）を回転しながら地中等に貫入していくことを特徴とする請求項１記載の回転羽根付アースアンカー。 A tip end portion (12) threaded (11) with an I-shaped cone (10) having a I-shaped cross section in plan view is attached to the tip end of the earth anchor (2) with the rotary blade, The ground anchor with rotating blades according to claim 1, wherein the anchor (2) penetrates into the ground while rotating. 請求項１または２記載の回転羽根付アースアンカー（２）を用いて、プレボーリング後または直接貫入して所定の位置に到達した後引張力を掛け、羽根（１）を開き地中に係止させる回転羽根付アースアンカーの工法において、前記回転羽根付アースアンカー（２）を所定の位置まで貫入すべく連結金物（６）を、鋼線（５）も含めて外径軸管（７）で被し、外径軸管（７）の内部側に取り付けられた下向きの爪（８）を、前記連結金物（６）の上面にあけられた爪孔（９）に差し込んで、回転羽根付アースアンカー（２）と外径軸管（７）を接合し、回転羽根付アースアンカー（２）の貫入時、外径軸管（７）の先端を、前記羽根（１）の長さｂ側の先端に接し、回転羽根付アースアンカー（２）が所定の位置に到達した時点で、外径軸管（７）を引いて前記爪（８）をはずし、外径軸管（７）を下げ戻しても爪（８）が連結金物（６）に当たらないように、連結金物（６）を軸にして９０度回転、押し込んで羽根（１）を開くと共に、鋼線（５）に引張力を掛け、羽根（１）を羽根止部に当たるまで概略９０度回転させ、その後外径軸管（７）を抜き取り、鋼線（５）と地上の構造物等と連結することによって構造物等と地盤を結合し、使用後は、外径軸管（７）を、鋼線（５）を内にいれて貫入して爪（８）を回転羽根付アースアンカー（２）の爪孔（９）に差込み、圧入して羽根（１）を回転、軸管（３）内に長さaの羽根の先端部以外を収納し、鋼線（５）に引張力を掛けて回転羽根付アースアンカー（２）を抜き取り、再使用することもできることを特徴とする回転羽根付アースアンカーの工法。 Using the earth anchor (2) with rotating blades according to claim 1 or 2, after pre-boring or directly penetrating and reaching a predetermined position, a tensile force is applied to lock the blade (1) in the open ground. In the construction method of the earth anchor with rotating blades, the outer metal shaft pipe (7) including the steel wire (5) is connected to the ground anchor (2) including the steel wire (5) in order to penetrate the earth anchor with rotating blade (2) to a predetermined position. Put the downward claw (8) attached to the inner side of the outer diameter shaft tube (7) into the claw hole (9) opened in the upper surface of the connection metal fitting (6), and ground with a rotating blade When the anchor (2) and the outer diameter shaft pipe (7) are joined and the earth anchor (2) with rotating blades penetrates, the tip of the outer diameter shaft tube (7) is connected to the length b side of the blade (1). tip in contact, when the ground anchor with rotating blade (2) has reached a predetermined position, the outer-diameter shaft tube 7) the Remove claw (8) by pulling, as nails back down the outer-diameter shaft tube (7) (8) does not hit the connection hardware (6), by connecting hardware (6) in the axial Rotate 90 degrees, push in to open the blade (1), apply tensile force to the steel wire (5), rotate the blade (1) approximately 90 degrees until it hits the blade stop , and then rotate the outer diameter shaft tube (7) Pull out the steel wire (5) and connect it to the ground structure, etc. to connect the structure and the ground, and after use, put the outer diameter shaft pipe (7) and the steel wire (5) inside. Insert the claw (8) into the claw hole (9) of the earth anchor (2) with rotating blades, press fit and rotate the blade (1), the tip of the blade of length a into the axial tube (3) rotor blades housing a non withdrawn ground anchor with rotating blades (2) multiplied by the tensile force to the steel wire (5), characterized in that it is also possible to re-use Method of ground anchor.
JP2007228417A 2007-09-04 2007-09-04 Earth anchor with rotating blades and its construction method Expired - Fee Related JP4206442B1 (en)

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JP5186695B1 (en) * 2011-10-27 2013-04-17 株式会社小笠原設計 Ground anchor with rotating bearing and its construction method
JP5551146B2 (en) * 2011-12-28 2014-07-16 日本フォームサービス株式会社 Underground anchor with expansion blade
JP5544487B1 (en) * 2013-12-26 2014-07-09 株式会社小笠原設計 Ground anchor

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