JP4384894B2 - How to install pressure plate for earth anchor - Google Patents

How to install pressure plate for earth anchor Download PDF

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Publication number
JP4384894B2
JP4384894B2 JP2003373530A JP2003373530A JP4384894B2 JP 4384894 B2 JP4384894 B2 JP 4384894B2 JP 2003373530 A JP2003373530 A JP 2003373530A JP 2003373530 A JP2003373530 A JP 2003373530A JP 4384894 B2 JP4384894 B2 JP 4384894B2
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anchor
pressure receiving
receiving plate
ground
insertion hole
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JP2005133509A (en
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山本　　彰
誠 鳥井原
正良 深井
浩 山田
泰治 三上
大伍 佐藤
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Obayashi Corp
Sumitomo SEI Steel Wire Corp
Nittoc Constructions Co Ltd
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Obayashi Corp
Sumitomo SEI Steel Wire Corp
Nittoc Constructions Co Ltd
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  • Piles And Underground Anchors (AREA)

Description

本発明は、アースアンカー用受圧板の設置方法に関し、特に、アンカーの地盤に対する打設角度と受圧板の受圧面とのなす角度を直角に調整可能なアースアンカー用受圧板の設置方法に関する。 The present invention relates to a method for installing a pressure receiving plate for an earth anchor , and more particularly to a method for installing a pressure receiving plate for an earth anchor capable of adjusting an angle between an anchor placement angle with respect to the ground and a pressure receiving surface of the pressure receiving plate to a right angle.

グランドアンカー工においては、アンカーが有効な緊張力を得るためには、アンカーと、受圧板の受圧面との交差角は直角とすることが必要である。一方、この種のアンカーは、地滑りの方向、グランドアンカーの効果、定着層などの位置を考慮して、斜面に対して垂直だけでなく、ある程度の傾斜角度をつけて打設する場合がある。   In the ground anchor work, in order for the anchor to obtain an effective tension, it is necessary that the angle of intersection between the anchor and the pressure receiving surface of the pressure receiving plate be a right angle. On the other hand, this type of anchor is sometimes placed with a certain inclination angle in addition to being perpendicular to the slope in consideration of the direction of landslide, the effect of the ground anchor, and the position of the fixing layer.

ところで、本発明者等は、図５，６に示されるような円盤状の受圧板を開発した。このような受圧板１において、アンカーが地表面に対して垂直でなく、ある程度の傾斜角度θで打設された場合には、受圧板１の中心を貫通するアンカー挿通孔２がアンカー打設方向と同じ角度となるように傾斜させることにより、挿通孔２の上部側に形成されたアンカー支持面３はアンカー打設方向に対して直角に交わる面となり、これによって、アンカーと受圧板の受圧面（アンカー支持面３）との交差角を直角とすることができる。   By the way, the present inventors have developed a disk-shaped pressure receiving plate as shown in FIGS. In such a pressure receiving plate 1, when the anchor is not perpendicular to the ground surface and is driven at a certain inclination angle θ, the anchor insertion hole 2 penetrating the center of the pressure receiving plate 1 has an anchor placement direction. The anchor support surface 3 formed on the upper side of the insertion hole 2 becomes a surface that intersects at right angles to the anchor placement direction, whereby the pressure receiving surface of the anchor and the pressure receiving plate is obtained. The angle of intersection with (anchor support surface 3) can be a right angle.

しかしながら、この構造においては、アンカーの地盤に対する打設角度に応じてアンカー挿通孔２の傾斜角度を設定したり、アンカー支持面３の角度をいちいち設定して製作しなければならず、製作工程が煩雑であるだけでなく、量産性に乏しいという問題がある。   However, in this structure, it is necessary to set the inclination angle of the anchor insertion hole 2 according to the anchoring angle of the anchor with respect to the ground, or to set the angle of the anchor support surface 3 one by one. In addition to being complicated, there is a problem that mass productivity is poor.

また、このような構造とした場合においても、打設する法面の施工に伴う誤差やアンカーの打設角度の誤差、あるいは打設する場所が崖地のような地盤面打設方向とのなす角度が異なる場合には全く適用できなくなり、再調整などの却って面倒な作業が必要となっていた。   Even in such a structure, the error due to the construction of the slope to be cast, the error of the anchor placement angle, or the place to be cast is the ground surface placement direction such as a cliff. When the angle is different, it cannot be applied at all, and troublesome work such as readjustment is required.

本発明は、以上の課題を解決するものであって、その目的は、アンカーの地盤に対する
打設角度と受圧板の受圧面とのなす角度を容易に直角に調整できる、アースアンカー用受圧板の設置方法を提供するものである。 The present invention solves the above-mentioned problems, and the object thereof is to anchor ground.
It is an object of the present invention to provide an earth anchor pressure receiving plate installation method capable of easily adjusting the angle between the placement angle and the pressure receiving surface of the pressure receiving plate to a right angle .

前記目的を達成するため本発明は、受圧板の中心にその底面に対して直交するアンカー挿通孔を開口し、該アンカー挿通孔の先端部周囲をアンカーの突出端の支持面としたアンカー用受圧板の設置方法であって、前記受圧板を地盤の表面に配置して、前記地盤に打設されたアンカーの頭部を前記受圧板のアンカー挿通孔内を挿通させ、この際、予め前記アンカーの頭部に筒状の縁切り材を取り付けておき、該縁切り材を前記アンカーの頭部の地盤の表面側に配置し、前記受圧板の底面と前記地盤の表面との間にスペーサを介装させて、前記受圧板の底面を前記アンカーに直交させるとともに、前記受圧板の底面と前記地盤の表面との間にテーパ状断面の隙間を形成し、前記隙間内に間詰め部材を打設して固化させることによりテーパ状断面の増設部を形成し、該増設部により前記受圧板をその底面が前記アンカーと直交した状態に固定することを特徴とする。 In order to achieve the above object, the present invention provides an anchor pressure receiving hole in which an anchor insertion hole perpendicular to the bottom surface is opened at the center of the pressure receiving plate, and the periphery of the tip of the anchor insertion hole is used as a support surface of the protruding end of the anchor. A method for installing a plate, wherein the pressure receiving plate is disposed on a surface of a ground, and a head of an anchor placed on the ground is inserted through an anchor insertion hole of the pressure receiving plate. A cylindrical edge cutting material is attached to the head of the anchor, the edge cutting material is disposed on the surface side of the ground of the head of the anchor, and a spacer is interposed between the bottom surface of the pressure receiving plate and the surface of the ground. The bottom surface of the pressure receiving plate is orthogonal to the anchor, a gap having a tapered cross section is formed between the bottom surface of the pressure receiving plate and the surface of the ground, and a filling member is placed in the gap. Taper cross section Forming a portion, the bottom surface of the pressure receiving plate by the expansion unit is characterized in that fixed to the state of being perpendicular to the anchor.

また、本発明は、前記間詰め材は、コンクリート又はモルタルであることを特徴とすることとしてもよい。 Further, the present invention may be characterized in that the filling material is concrete or mortar .

以上の構成によれば、アンカーが地盤面に対してある傾きをもって打設されている場合に、受圧板の底面と地盤面との間にスペーサを介在させて、受圧板の底面と地盤面との間にテーパ状断面の隙間を形成し、この隙間内に間詰め材を充填して固化させてテーパ状断面の増設部を形成することにより、受圧板の底面をアンカーに直交した状態に固定することができる。
従って、アンカーが地盤面に対してある傾きをもって打設されている場合に、受圧板の底面をアンカーに直交させる調整を容易に行うことができる。また、スペーサと間詰め材とからなる簡単な構成のものであるので、量産性を高めることができる。
さらに、アンカーの頭部の地盤の表面側の部分には縁切り材が取り付けられ、この縁切り材によって間詰め材がアンカーの周囲に回り込んで固着するのを防止できるので、アンカーの機能を維持することができる。 According to the above configuration, when the anchor is driven with a certain inclination with respect to the ground surface, the spacer is interposed between the bottom surface of the pressure receiving plate and the ground surface, so that the bottom surface and the ground surface of the pressure receiving plate are By forming a gap with a taper-shaped cross section between them and filling the gap material in this gap and solidifying it to form an additional part with a taper-shaped cross section, the bottom surface of the pressure receiving plate is fixed in a state orthogonal to the anchor can do.
Therefore, when the anchor is driven with a certain inclination with respect to the ground surface, it is possible to easily adjust the bottom surface of the pressure receiving plate to be orthogonal to the anchor. Moreover, since it is a simple structure which consists of a spacer and a filling material, mass-productivity can be improved.
Furthermore, an edge cutting material is attached to the surface side portion of the ground of the head of the anchor, and the edge cutting material can prevent the padding material from turning around and fixing around the anchor, thereby maintaining the function of the anchor. be able to.

以下、本発明の実施の形態を添付図面を用いて説明する。
図１は、本発明による一実施の形態のアースアンカー用受圧板の設置方法に用いる受圧板の断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of a pressure receiving plate used in a method for installing a ground anchor pressure receiving plate according to an embodiment of the present invention.

同図における受圧板１０は、プレキャストコンクリートからなるものである。この受圧板１０の断面はその底面中心よりこれと直角にその上下を貫通するアンカー挿通孔１２を形成し、アンカー挿通孔１２の上部周縁にこれと同心かつ径大な矩形状または円筒形のアンカー頭部収納用凹部１４を形成し、この凹部１４と挿通孔１２との段差部分をアンカー支持面１６としたものである。   The pressure receiving plate 10 in the figure is made of precast concrete. The cross section of the pressure receiving plate 10 is formed with an anchor insertion hole 12 penetrating up and down at a right angle from the center of the bottom surface, and a rectangular or cylindrical anchor concentrically and large in diameter at the upper peripheral edge of the anchor insertion hole 12. A head receiving recess 14 is formed, and a step portion between the recess 14 and the insertion hole 12 is used as an anchor support surface 16.

また、受圧板１０の平面形状は、図２（ａ）に示すように、従来と同様の円盤状のほかに（ｂ）〜（ｄ）に示すように、矩形状、クロス形、多角形状などその支持圧力分布、斜面配列時における意匠形状などに応じて各種平面形状を選択できるが、いずれにしろその基本断面形状は前記のごとく受圧板１０の底面、すなわち設置面に対して挿通孔１２及び凹部１４が直角に形成され、後述するアンカーの地盤への打設角度に依存しないため、製作が簡単で量産性に富む。   Further, the planar shape of the pressure receiving plate 10 is, as shown in FIG. 2A, a rectangular shape, a cross shape, a polygonal shape, etc., as shown in FIGS. Various planar shapes can be selected according to the support pressure distribution, the design shape at the time of the slope arrangement, etc., but in any case, the basic cross-sectional shape is the insertion hole 12 and the insertion hole 12 with respect to the bottom surface of the pressure receiving plate 10, that is, the installation surface as described above. Since the concave portion 14 is formed at a right angle and does not depend on the anchor placement angle to the ground, which will be described later, the manufacture is simple and the mass productivity is high.

以上の受圧板１０の設置手順を図３を用いて説明する。まず、同図（ａ）に示すように、アンカー２０は地盤Ｅ内に打設され、グラウト２２により地盤Ｅ内に固定される。その後、前記受圧板１０はアンカー２０の先端を挿通した状態で斜面に設置されるが、図示のごとくアンカー２０が斜面直交位置に対してある傾きθをもって打設されている場合には、受圧板１０を斜面に対しその傾きθと等しい傾きに設置し、アンカー頭部２０ａを挿通孔１２の中心に一致させる。   The installation procedure of the pressure receiving plate 10 will be described with reference to FIG. First, as shown in FIG. 2A, the anchor 20 is driven in the ground E and fixed in the ground E by the grout 22. Thereafter, the pressure receiving plate 10 is installed on the slope in a state where the tip of the anchor 20 is inserted. However, when the anchor 20 is driven with a certain inclination θ with respect to the position orthogonal to the slope as shown in the drawing, the pressure receiving plate 10 10 is installed with an inclination equal to the inclination θ with respect to the inclined surface, and the anchor head 20 a is made to coincide with the center of the insertion hole 12.

具体的には、小石、コンクリートブロックなどのスペーサ２４を受圧板１０の底面と地盤面との間に介在することで実現でき、その後は図３（ｂ）に示すように、隙間にコンクリート、モルタルなど増設部となる間詰め材２６を打設し、固化させることで傾斜状態に固定できる。   Specifically, it can be realized by interposing a spacer 24 such as a pebbles or a concrete block between the bottom surface of the pressure receiving plate 10 and the ground surface, and thereafter, as shown in FIG. It is possible to fix it in an inclined state by placing and solidifying the interlining material 26 to be an additional portion.

なお、挿通孔１２の下部において打設した間詰め材２６がアンカー２０の周囲に周り込んで固着されてしまうことを防止するために筒状の縁切り材２８を予め挿通した上で打設作業を行えばよい。   In addition, in order to prevent the filling material 26 that has been cast in the lower portion of the insertion hole 12 from being wrapped around the anchor 20 and being fixed, a tubular edge cutting material 28 is inserted in advance and the placing work is performed. Just do it.

間詰め材２６の固化後は、アンカー支持面１６に座金３０を配置し、座金３０より突出するアンカー２０の頭部に定着材３２を取付け、これを締め上げることでアンカー２０を緊張状態に定着すれば、設置工事が終了する。   After the filling material 26 is solidified, the washer 30 is disposed on the anchor support surface 16, the fixing material 32 is attached to the head of the anchor 20 protruding from the washer 30, and the anchor 20 is tightened to fix the anchor 20 in a tensioned state. Then, the installation work is completed.

定着板１０の傾斜方向はアンカー２０の傾斜方向に応じて任意に設定でき、またいずれの傾斜角度であってもスペーサ２４の高さや介挿位置に応じて適合できる。   The inclination direction of the fixing plate 10 can be arbitrarily set according to the inclination direction of the anchor 20, and can be adapted according to the height of the spacer 24 and the insertion position at any inclination angle.

図４は本発明の第２実施形態を示す。なお、本実施形態において前記実施形態と同一箇所には同一符号を用いて説明する。   FIG. 4 shows a second embodiment of the present invention. In the present embodiment, the same portions as those in the above embodiment will be described using the same reference numerals.

図４（ａ）において、アンカー２０打設後に座板４０を地表面に設置する。座板４０は、平面形が前記受圧板１０と同形状であるが、テーパ状断面に形成され、さらにその盤面中心の上下を貫通して、前記アンカー挿通孔１２に同軸に連通する第２の挿通孔４２を形成したものである。   In Fig.4 (a), the seat board 40 is installed in the ground surface after anchor 20 placement. The seat plate 40 has a planar shape that is the same as the pressure receiving plate 10, but is formed in a tapered cross section, and further passes through the top and bottom of the center of the board surface and communicates coaxially with the anchor insertion hole 12. The insertion hole 42 is formed.

その後、（ｂ）に示すように座板４０上に受圧板１０を設置し、支持面１６上に座金３０を配置し、定着材３２によりアンカー２０の頭部を締め付け、緊張状態に定着することで、設置工事が終了する。   Thereafter, as shown in FIG. 4B, the pressure receiving plate 10 is installed on the seat plate 40, the washer 30 is arranged on the support surface 16, the head of the anchor 20 is tightened by the fixing material 32, and is fixed in a tension state. Now, the installation work is finished.

本実施形態では、アンカー２０の地盤Ｅに対する打設角度が常時一定である場合に適合でき、間詰め材の打設工程を省略できるため、施工が簡単となる。また、座板４０と受圧板１０の一体化を図るために両者の接合面をモルタルなどの接着剤を介在させた上で座板４０上に受圧板１０を設置することもできる。   In the present embodiment, it is possible to adapt to the case where the anchoring angle of the anchor 20 with respect to the ground E is always constant, and the step of placing the filling material can be omitted. In order to integrate the seat plate 40 and the pressure receiving plate 10, the pressure receiving plate 10 can be installed on the seat plate 40 with an adhesive such as mortar interposed between the joint surfaces of the both.

本発明にかかる受圧板の断面図である。It is sectional drawing of the pressure receiving plate concerning this invention. （ａ）〜（ｄ）は同受圧板の平面図である。(A)-(d) is a top view of the same pressure receiving plate. （ａ），（ｂ）は同受圧板を用いた設置手順の一例を示す断面図である。(A), (b) is sectional drawing which shows an example of the installation procedure using the same pressure receiving plate. （ａ），（ｂ）は同受圧板を用いた設置手順の他の例を示す断面図である。(A), (b) is sectional drawing which shows the other example of the installation procedure using the said pressure receiving plate. 従来のアンカー打設角度対応形受圧板の断面図である。It is sectional drawing of the conventional anchor placement angle corresponding | compatible pressure receiving plate. 同一部破断斜視図である。It is the same part fracture perspective view.

符号の説明Explanation of symbols

１，１０ 受圧板
２，１２ アンカー挿通孔
１４ アンカー頭部収納用凹部
３，１６ アンカー支持面
２０ アンカー
２６ 間詰め材
４０ 座板 DESCRIPTION OF SYMBOLS 1,10 Pressure-receiving plate 2,12 Anchor insertion hole 14 Anchor head storage recessed part 3,16 Anchor support surface
20 Anchor 26 Filling material 40 Seat plate

Claims (2)

受圧板の中心にその底面に対して直交するアンカー挿通孔を開口し、該アンカー挿通孔の先端部周囲をアンカーの突出端の支持面としたアンカー用受圧板の設置方法であって、
前記受圧板を地盤の表面に配置して、前記地盤に打設されたアンカーの頭部を前記受圧板のアンカー挿通孔内を挿通させ、この際、予め前記アンカーの頭部に筒状の縁切り材を取り付けておき、該縁切り材を前記アンカーの頭部の地盤の表面側に配置し、
前記受圧板の底面と前記地盤の表面との間にスペーサを介装させて、前記受圧板の底面を前記アンカーに直交させるとともに、前記受圧板の底面と前記地盤の表面との間にテーパ状断面の隙間を形成し、
前記隙間内に間詰め部材を打設して固化させることによりテーパ状断面の増設部を形成し、該増設部により前記受圧板をその底面が前記アンカーと直交した状態に固定することを特徴とするアースアンカー用受圧板の設置方法。 An anchor pressure receiving plate installation method in which an anchor insertion hole perpendicular to the bottom surface is opened at the center of the pressure receiving plate, and the periphery of the tip of the anchor insertion hole is used as a support surface of the protruding end of the anchor,
The pressure receiving plate is disposed on the surface of the ground, and the head of the anchor placed on the ground is inserted through the anchor insertion hole of the pressure receiving plate. A material is attached, and the edge cutting material is disposed on the surface side of the ground of the head of the anchor,
A spacer is interposed between the bottom surface of the pressure receiving plate and the surface of the ground so that the bottom surface of the pressure receiving plate is orthogonal to the anchor and is tapered between the bottom surface of the pressure receiving plate and the surface of the ground. Forming a gap in the cross section,
An insertion portion having a tapered cross section is formed by placing and solidifying a filling member in the gap, and the pressure receiving plate is fixed to the anchor plate in a state where the bottom surface thereof is orthogonal to the anchor. How to install pressure receiving plate for earth anchor . 前記間詰め材は、コンクリート又はモルタルであることを特徴とする請求項１に記載のアースアンカー用受圧板の設置方法。 The method for installing a pressure receiving plate for an earth anchor according to claim 1, wherein the filling material is concrete or mortar .
JP2003373530A 2003-10-31 2003-10-31 How to install pressure plate for earth anchor Expired - Fee Related JP4384894B2 (en)

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