JPH0711861A - Steel-tower foundation hole and forming method thereof - Google Patents
Steel-tower foundation hole and forming method thereofInfo
- Publication number
- JPH0711861A JPH0711861A JP5155491A JP15549193A JPH0711861A JP H0711861 A JPH0711861 A JP H0711861A JP 5155491 A JP5155491 A JP 5155491A JP 15549193 A JP15549193 A JP 15549193A JP H0711861 A JPH0711861 A JP H0711861A
- Authority
- JP
- Japan
- Prior art keywords
- steel tower
- tower foundation
- hole
- foundation hole
- steel
- 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.)
- Pending
Links
Landscapes
- Foundations (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉄塔基礎を根入するた
めの鉄塔基礎穴及びその形成方法に係わり、特に転びを
有する鉄塔基礎を根入させるために工夫された鉄塔基礎
穴及びその形成方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel tower foundation hole for embedding a steel tower foundation and a method for forming the same, and in particular, a steel tower foundation hole devised for embedding a steel tower foundation having a fall and its formation. It is about the method.
【０００２】[0002]
【従来の技術】鉄塔基礎は、近年は直径が２ｍ〜４ｍ、
深さ１０ｍ〜２０ｍの深礎基礎が増えている。2. Description of the Related Art In recent years, steel tower foundations have a diameter of 2 m to 4 m,
The number of deep foundations with a depth of 10 to 20 m is increasing.
【０００３】図４は従来の鉄塔基礎穴の形成方法を説明
するための概略図である。FIG. 4 is a schematic view for explaining a conventional method of forming a steel tower foundation hole.
【０００４】従来は、地面１を素掘りしてこれに鉄塔基
礎２を強固に固定するための鉄塔基礎穴３を形成するに
際して、土留パネル５一枚分の高さとほぼ等しくなる毎
に掘削を止め、その穴３ａの内面６を覆うように土留パ
ネル５を取り付けた後、土留パネル５の下に穴３ａを拡
張し、その穴３ａを新たに別の土留パネル５で覆うとい
う工法が採用されていた。また、穴３ａに取り付けられ
る土留パネル５の重量を支え、その落下を防ぐために、
従来は、地上に穴周りに土留パネル５を環状に組みその
外周にコンクリートを打設してこれを基礎として土留パ
ネル５を下方に継ぎ足していくという方法や、コンクリ
ートの代わりにワイヤーロープ（図示せず）を用いると
いう方法が採用されていた。なお従来の工法は詳しく
は、土留パネル５の一枚分の高さ（５０ｃｍ）程度の掘
削が済む毎にその穴３ａの内面６を覆うように土留パネ
ル５…を多数取り付け、これら土留パネル５…を円周方
向に連結することによって、穴３ａの崩壊を防止すると
いうものであり、その後に、土留パネル５…により覆い
終えた上方の穴３ａの直ぐ下に、新たに土留パネル一枚
分の高さの穴３ａを掘削し、その穴３に新しく土留パネ
ル５を押し込みむようにして取り付けて上段と下段の土
留パネル５，５同士及び下段の土留パネル５，５同士を
円周方向に互いに連結し鉄塔基礎穴３を深さ方向に延長
していくというものである。Conventionally, when the ground 1 is dug and the steel tower foundation hole 3 for firmly fixing the steel tower foundation 2 therein is formed, excavation is performed every time the height of one earth retaining panel 5 becomes almost equal. After stopping, and attaching the soil retaining panel 5 so as to cover the inner surface 6 of the hole 3a, a method of expanding the hole 3a under the soil retaining panel 5 and newly covering the hole 3a with another soil retaining panel 5 is adopted. Was there. Moreover, in order to support the weight of the soil retaining panel 5 attached to the hole 3a and prevent it from falling,
Conventionally, the soil retaining panel 5 is annularly assembled around the hole on the ground, concrete is placed around the hole, and the soil retaining panel 5 is added downward on the basis of this, or a wire rope (not shown) is used instead of concrete. Method) was used. The conventional construction method is described in detail. Each time the soil retaining panel 5 is excavated to a height (50 cm), a large number of soil retaining panels 5 are attached so as to cover the inner surface 6 of the hole 3a. By connecting the ... in the circumferential direction, the collapse of the hole 3a is prevented. After that, just below the upper hole 3a covered by the earth retaining panel 5 ... The hole 3a of the height is drilled, and the earth retaining panel 5 is newly inserted into the hole 3 so as to be attached to connect the upper and lower earth retaining panels 5, 5 and the lower earth retaining panels 5, 5 to each other in the circumferential direction. The steel tower foundation hole 3 is extended in the depth direction.
【０００５】[0005]
【発明が解決しようとする課題】ところで従来の送電線
鉄塔には鉄塔各部に有利な強度をもたせるために約１／
１０〜１／１５の転び（水平線に対する送電線鉄塔の鉄
塔材の勾配をいう。）が設けられている。したがって送
電線鉄塔は、下部にいくほど根開きが広くなる。しか
し、鉄塔基礎の転びを鉄塔基礎穴３内にできるだけ延ば
し鉄塔基礎２の強度を高めようとしても、鉄塔の建設に
採用されている鉄塔基礎材の寸法・形状（たとえば円
柱）は規格化乃至標準化されているため、鉄塔基礎２の
転び部分の長さは、図４に示す如く、鉄塔基礎穴３の直
径の５倍の長さまでしか設定することができず、それか
ら先は、鉄塔基礎穴３に沿わせて折り曲げざるを得ない
という問題があった。つまり、鉄塔基礎２に対する力の
伝達方向が折り曲げ点７で変ってしまうために、折り曲
げ点７から先を補強材で補強したり鉄筋コンクリートに
よって補強せざるを得ないという問題がある。By the way, in the conventional transmission line steel tower, in order to give advantageous strength to each part of the steel tower, about 1 /
There is a fall of 10 to 1/15 (which means the gradient of the tower material of the transmission line tower with respect to the horizon). Therefore, the root of the transmission line tower becomes wider toward the bottom. However, even if an attempt is made to extend the fall of the steel tower foundation into the steel tower foundation hole 3 as much as possible to increase the strength of the steel tower foundation 2, the size and shape (for example, a cylinder) of the steel tower foundation material used in the construction of the steel tower is standardized or standardized. Therefore, the length of the falling portion of the steel tower foundation 2 can be set only up to 5 times the diameter of the steel tower foundation hole 3 as shown in FIG. There was a problem that it had to be bent along with. That is, since the direction of the force transmission to the steel tower foundation 2 changes at the bending point 7, there is a problem that the portion beyond the bending point 7 must be reinforced with a reinforcing material or reinforced concrete.
【０００６】本発明の第１の目的は、鉄塔基礎の転びを
鉄塔基礎穴内に収容し得る形状の鉄塔基礎穴を提供する
ことである。A first object of the present invention is to provide a steel tower foundation hole having a shape capable of accommodating a fall of the steel tower foundation in the steel tower foundation hole.
【０００７】本発明の第２の目的は、第１の目的に係る
鉄塔基礎穴を安全かつ迅速に作り得る鉄塔基礎穴の形成
方法を提供することにある。A second object of the present invention is to provide a method for forming a steel tower foundation hole according to the first object, by which the steel tower foundation hole can be made safely and quickly.
【０００８】[0008]
【課題を解決するための手段】第１の発明は、鉄塔基礎
穴を深さ方向に末広がりの円錘台形に形成し、その鉄塔
基礎穴の内壁をその崩壊を防止するための多数の土留パ
ネルで覆って鉄塔基礎穴を形成したものである。A first aspect of the present invention is to provide a large number of earth retaining panels for preventing the collapse of the inner wall of the steel tower foundation hole by forming the steel tower foundation hole in the shape of a truncated cone that spreads in the depth direction. It is a steel tower foundation hole that is covered with.
【０００９】第２の発明は、第１の発明において、上記
鉄塔基礎穴の軸芯線を中心とする鉄塔基礎穴内面に、そ
のスパイラル方向に沿って順次接続可能にかつ上下方向
において接続可能に形成された土留パネルを多数準備し
て掘削により、地面に上記鉄塔基礎穴を形成しつつその
鉄塔基礎穴の進行度が土留パネル一枚分の取り付けを可
能となる度に、掘削により形成された鉄塔基礎穴の内面
にこれに適合する土留パネルを逐次取り付けるようにし
たものである。According to a second aspect of the present invention, in the first aspect of the present invention, it is formed on the inner surface of the steel tower foundation hole centering on the axis of the steel tower foundation hole so as to be sequentially connectable in the spiral direction and vertically connectable. A large number of prepared soil retaining panels are prepared and excavated to form the steel tower foundation holes in the ground, and the progress of the steel tower foundation holes enables mounting of one soil retaining panel each time the steel tower foundation holes are formed by excavation. Soil retention panels suitable for this are sequentially attached to the inner surface of the foundation hole.
【００１０】[0010]
【作用】第１の発明についてその作用を述べると、円錘
台形の鉄塔基礎穴は、深さ方向に順次開口径が大きくな
るため、転びのある鉄塔基礎を何等支承なく根入するこ
とができる。したがって鉄塔基礎を従来のように補強す
る必要がなく、鉄塔全体のコストダウンが達成されその
強度及び信頼性が実質的に改善される。また、鉄塔基礎
穴の軸芯線を僅かに修正するだけで鉄塔基礎の転びに対
応させることもできる。The operation of the first invention will be described. Since the conical trapezoidal tower tower hole has a gradually increasing opening diameter in the depth direction, it is possible to insert a rolling tower tower without any support. . Therefore, it is not necessary to reinforce the steel tower foundation as in the conventional case, the cost of the entire steel tower is reduced, and its strength and reliability are substantially improved. In addition, it is possible to cope with the fall of the steel tower foundation by only slightly modifying the axis line of the steel tower foundation hole.
【００１１】第２の発明は、土留パネル一枚鉄塔基礎穴
を掘削する度に、その掘削された鉄塔基礎穴の内面に適
合した土留パネルをスパイラル方向に沿って取り付ける
というものであり、かつスパイラル方向及び上下方向に
おいて土留パネルを連結してその重量を掘削中の鉄塔基
礎穴に支持させておくというものであるため、崩れが起
きることなく安全であり、短い時間で鉄塔基礎穴を円錘
台形に形成することができる。A second aspect of the invention is to attach a soil retaining panel, which fits the inner surface of the excavated steel tower foundation hole, along the spiral direction every time the soil retaining panel single steel tower foundation hole is excavated. Since the soil retention panels are connected in the vertical and vertical directions and the weight is supported by the steel tower foundation hole during excavation, it is safe without collapse and the steel tower foundation hole is formed into a truncated cone shape in a short time. Can be formed.
【００１２】[0012]
【実施例】以下に、本発明の好適一実施例を添付図面に
基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
【００１３】図１には本発明に係る鉄塔基礎穴の概略断
面図が示されている。FIG. 1 is a schematic sectional view of a steel tower foundation hole according to the present invention.
【００１４】鉄塔基礎穴８は、従来の円筒形状のものと
は異なって図１に示すように、開口径が深さ方向に沿っ
て順次大きくなる円錘台形に形成されている。この鉄塔
基礎穴８には、その内面９が、鉄塔基礎穴８の崩壊が起
きることがないように、多数の土留パネル10-1,10-2,10
-3, …,10-n-1,10n により多段に覆われている。もちろ
ん、鉄塔基礎穴８の上部開口直径，底部直径及び深さ
は、土留パネル10-1, 10-2,10-3 …，10-n-1,10nで覆い
終えた段階において、転びのある鉄塔基礎２を何等の支
承もなく根入できるように予め決定されている。Unlike the conventional cylindrical tower hole, the steel tower foundation hole 8 is formed in a truncated cone shape in which the opening diameter gradually increases along the depth direction, as shown in FIG. The inner surface 9 of the steel tower foundation hole 8 has a large number of earth retaining panels 10-1, 10-2, 10 so that collapse of the steel tower foundation hole 8 does not occur.
-3,…, 10-n-1, 10n are covered in multiple stages. Of course, the upper opening diameter, the bottom diameter and the depth of the steel tower foundation hole 8 have a fall when they are completely covered with the soil retaining panels 10-1, 10-2, 10-3 ..., 10-n-1, 10n. It is determined in advance so that the steel tower foundation 2 can be embedded without any support.
【００１５】したがって、転びのある鉄塔基礎２を鉄塔
基礎穴８に支承なく根入することができるようになり、
鉄塔の強度及び信頼性を改善できならびに鉄塔全体のコ
ストを大巾にダウンできる。なお、円錘台形の鉄塔基礎
２は、その開口直径が深さ方向に沿って順次拡大される
という形状のため、掘削時において鉄塔基礎穴８の軸芯
線を僅かに変更するだけ転びのある鉄塔基礎２を余裕を
もって根入させることができるという利点も備えてい
る。Therefore, the steel tower foundation 2 with a fall can be inserted into the steel tower foundation hole 8 without any support,
The strength and reliability of the steel tower can be improved, and the cost of the entire steel tower can be greatly reduced. The truncated pyramid-shaped steel tower foundation 2 has a shape in which the opening diameter thereof is sequentially expanded along the depth direction, and therefore, at the time of excavation, a slight change in the axial core wire of the steel tower foundation hole 8 causes the steel tower to fall. It also has the advantage that the foundation 2 can be embedded with a margin.
【００１６】図２には、スパイラル方向及び上下方向に
沿って多数の土留パネル10-1,10-2,10-3…,10-n-1,10n
を連結して成る土留壁１１の具体例が示されている。In FIG. 2, a large number of earth retaining panels 10-1, 10-2, 10-3 ..., 10-n-1, 10n are arranged along the spiral direction and the vertical direction.
A concrete example of the retaining wall 11 formed by connecting the two is shown.
【００１７】これら土留パネル10-1,10-2,10-3…，10-n
-1,10nは、円錘台形の鉄塔基礎穴８の内面９を覆うべ
く、鉄塔基礎穴８の軸芯線を中心としかつ鉄塔基礎穴８
の内面９に沿ったスパイラル方向において互いに連結し
得るように形成されており、また上下方向において連結
し得るように形成されている。換言すれば、各土留パネ
ル10-1, 10-2,10-3 …，10-n-1,10nは、鉄塔基礎穴８の
内面９に沿わせて予め円錘台形に成形された土留壁１１
を、そのスパイラル方向に沿って多段に分割し、かつス
パイラル方向と交差する方向において多数に分割したも
のと結果的に同じものとなる。These earth retaining panels 10-1, 10-2, 10-3 ..., 10-n
-1,10n is centered on the axis of the steel tower foundation hole 8 and covers the steel tower foundation hole 8 so as to cover the inner surface 9 of the truncated pyramid shaped steel tower foundation hole 8.
Are formed so that they can be connected to each other in the spiral direction along the inner surface 9 of the above, and also can be connected to each other in the vertical direction. In other words, each soil retaining panel 10-1, 10-2, 10-3 ..., 10-n-1, 10n is a soil retaining wall that is formed in a truncated cone shape along the inner surface 9 of the steel tower foundation hole 8 in advance. 11
Is divided into multiple stages along the spiral direction and is also divided into a large number in the direction intersecting the spiral direction, resulting in the same result.
【００１８】図３には土留パネルの連結構造の一例が示
されている。FIG. 3 shows an example of the connecting structure of the soil retaining panels.
【００１９】この例では、鉄塔基礎穴８の内面９からの
土留パネル10-1, 10-2,10-3,…,10-n-1,10n の落下を防
止するために、土留パネル10-1, 10-2,10-3,…, 10-n-
1,10nには、それぞれその土留壁１１に、打ち杭１２を
案内して土留パネル10-1, 10-2,10-3,…, 10-n-1,10n
を、鉄塔基礎穴８に打付けておくための差込み穴１３が
設けられている。また、各土留パネル10-1, 10-2,10-3,
…, 10-n-1,10nには、その上・下縁に、土留パネル10-
1, 10-2,10-3,…, 10-n-1,10nの内側に張り出させてフ
ランジ１４が形成されている。各フランジ１４は、それ
ぞれ上・下の土留パネルとその中間に位置された土留パ
ネルとを、鍵形ボルト１５で上下に接続するために、そ
れぞれボルト差込み穴１６を有している。In this example, in order to prevent the earth retaining panels 10-1, 10-2, 10-3, ..., 10-n-1, 10n from falling from the inner surface 9 of the steel tower foundation hole 8, the earth retaining panels 10 are used. -1, 10-2,10-3, ..., 10-n-
In 1 and 10n, the pile pile 12 is guided to the soil retaining wall 11, and the soil retaining panels 10-1, 10-2, 10-3, ..., 10-n-1, 10n.
Is provided in the steel tower foundation hole 8 for inserting. Also, each soil retaining panel 10-1, 10-2, 10-3,
…, 10-n-1 and 10n have earth retaining panels 10- on their upper and lower edges.
1, 10-2, 10-3, ..., 10-n-1, 10n are formed so as to project to the inside of the flange 14. Each of the flanges 14 has a bolt insertion hole 16 for connecting the upper and lower soil retaining panels and the soil retaining panel positioned in the middle thereof with the key bolts 15 in the vertical direction.
【００２０】これらのボルト差込み穴１６は、それぞれ
スパイラル方向に沿った長穴となっている。またボルト
差込み穴１６の位置は、土留パネル10-1, 10-2,10-3,
…,10-n-1,10n をスパイラル方向に連結するために、上
部のフランジ１４に対してボルト差込み穴１６はその外
側に位置させて形成され、下部のフランジには、その上
部のフランジ１４のボルト差込み穴１６の位置を基準と
してその内側に形成されている。したがってボルト差込
み穴１６の位置を上部と下部のフランジ１４との間にお
いて一定間隔に決定すると、土留壁１１の円錘角はその
間隔により一義的に決定されることになる。Each of the bolt insertion holes 16 is an elongated hole along the spiral direction. In addition, the position of the bolt insertion hole 16 is the soil retaining panel 10-1, 10-2, 10-3,
In order to connect 10-n-1 and 10n in the spiral direction, the bolt insertion hole 16 is formed outside the upper flange 14, and the lower flange is formed on the lower flange 14. It is formed inside the bolt insertion hole 16 with reference to the position thereof. Therefore, if the positions of the bolt insertion holes 16 are determined at a constant interval between the upper and lower flanges 14, the cone angle of the earth retaining wall 11 is uniquely determined by the interval.
【００２１】さらに各土留パネル10-1,10-2,10-3, …,1
0-n-1,10n には、その内側面のスパイラル方向前端部中
央部に、スパイラル方向前方へ延びてパネル取り付け部
１７が形成されている。このパネル取り付け部１７に
は、その長手方向に間隔を隔ててボルト取り付け穴１８
が計２個を形成されている。そして各土留パネル１０-
の土留部１１には、そのスパイラル方向後端部の内面９
が、上記パネル取り付け部１７が重なり合うようにして
取り付けられたときに、それらボルト取り付け穴１８，
１８と符合される位置に夫々ねじ穴１９，１９が設けら
れている。Further, each soil retaining panel 10-1, 10-2, 10-3, ..., 1
Each of 0-n-1 and 10n is formed with a panel mounting portion 17 extending forward in the spiral direction at the center of the spiral-direction front end portion of the inner surface thereof. Bolt mounting holes 18 are formed in the panel mounting portion 17 at intervals in the longitudinal direction.
2 are formed in total. And each soil retaining panel 10-
The earth retaining portion 11 has an inner surface 9 at its rear end in the spiral direction.
However, when the panel mounting portions 17 are mounted so as to overlap each other, the bolt mounting holes 18,
Screw holes 19 and 19 are provided at positions corresponding to 18, respectively.
【００２２】したがってこれらの土留パネル10-1,10-2,
10-3, …,10-n-1,10n をスパイラル方向に及び上下方向
にボルト２０で連結すれば、図３に示すように渦巻き貝
の如き外観の土留壁１１が形成される。Therefore, these earth retaining panels 10-1, 10-2,
By connecting the bolts 10-3, ..., 10-n-1, 10n in the spiral direction and in the vertical direction, the earth retaining wall 11 having an appearance like a spiral shell is formed as shown in FIG.
【００２３】次に鉄塔基礎穴８の形成方法を図１及び図
３を参照しつつ説明する。Next, a method of forming the steel tower foundation hole 8 will be described with reference to FIGS.
【００２４】まず、上記土留壁１１を構成する上記土留
パネル10-1,10-2,10-3, …,10-n-1,10n 一式を準備す
る。First, a set of the earth retaining panels 10-1, 10-2, 10-3, ..., 10-n-1, 10n constituting the earth retaining wall 11 is prepared.
【００２５】次に、地面１を素掘して円錘台形の鉄塔基
礎穴８の形成を開始する。Next, the ground 1 is excavated and the formation of the truncated pyramid-shaped steel tower foundation hole 8 is started.
【００２６】まず図２に示すように、第１番目の土留パ
ネル10-1を地面１に嵌め込むことができ、そしてその第
１番目の土留パネル10-1の差し込み穴１３に半径方向内
方から打ち杭１２を打ち込むことができる程度に穴８ａ
を掘る（図３参照）。次にこの穴８ａを第２番目の土留
パネル10-2で覆える程度まで円周方向及び深さ方向に広
げた後、第１番目の土留パネル10-1と同様に打ち杭１２
によりその拡張された穴８ａの内面９に第２番目の土留
パネル10-2を取り付ける。このとき図３に示すように、
第１番目の土留パネル10-1のパネル取り付け部１７の内
側面と穴８ａの内面９との間にできた隙間に、第２番目
の土留パネル10-2の後端側を臨ませて押し込むことによ
り、第２番目の土留パネル10-2の後端面を第１番目の土
留パネル10-1の先端面に突き当てる。突き当て後は、第
１番目の土留パネル10-1のパネル取り付け部１７のボル
ト取り付け穴１８と、第２番目の土留パネル10-2のねじ
穴１９とを符合させて、ボルト２０を差しこみ螺合させ
ることにより、これらの第１番目と第２番目の土留パネ
ル10-1,10-2 とをスパイラル方向に連結する。First, as shown in FIG. 2, the first earth retaining panel 10-1 can be fitted on the ground 1, and the first earth retaining panel 10-1 can be inserted radially inward into the insertion hole 13 of the first earth retaining panel 10-1. Hole 8a to the extent that the driving pile 12 can be driven
Dig (see Figure 3). Next, after expanding the hole 8a in the circumferential direction and the depth direction to such an extent that it can be covered with the second earth retaining panel 10-2, the piles 12 are piled in the same manner as the first earth retaining panel 10-1.
The second earth retaining panel 10-2 is attached to the inner surface 9 of the expanded hole 8a by. At this time, as shown in FIG.
The rear end side of the second earth retaining panel 10-2 is pushed into the gap formed between the inner surface of the panel attaching portion 17 of the first earth retaining panel 10-1 and the inner surface 9 of the hole 8a. Thus, the rear end surface of the second earth retaining panel 10-2 is brought into contact with the tip surface of the first earth retaining panel 10-1. After butting, align the bolt mounting holes 18 of the panel mounting portion 17 of the first soil retaining panel 10-1 with the screw holes 19 of the second soil retaining panel 10-2, and insert the bolt 20. These first and second soil retaining panels 10-1 and 10-2 are connected in the spiral direction by screwing.
【００２７】このように多数の土留パネル10-1,10-2,10
-3, …,10-n-1,10n のうち土留パネル一枚の取り付けが
可能となる程度に順次穴８ａを拡張し、その拡張の都
度、拡張した穴８ａの内面９に土留パネルを順次取り付
けていく。As described above, a large number of soil retaining panels 10-1, 10-2, 10
-3,…, 10-n-1, 10n, the hole 8a is expanded in order to the extent that one earth retaining panel can be attached, and each time the expansion is performed, the earth retaining panel is sequentially arranged on the inner surface 9 of the expanded hole 8a. I will install it.
【００２８】ここで一段目の土留パネルの完了後（スパ
イラル１ピッチ分の完了後に相当する）を経て二段目に
移るときは、一段目の土留パネルの直ぐ下に二段目の土
留パネルを取り付けるために、穴８ａを拡張することに
なるが、このときは既に一段目を構成している各土留パ
ネルがそれぞれ穴８ａの内面９に打ち杭１２によって打
ち付けられており、また一段目の土留パネルが全体的に
形成途中の穴８ａの底に支持されることになるため、二
段目の土留パネル一枚の取り付けの為に一段目の直ぐ下
を、土留パネル一枚分拡張するようにしても、穴８ａが
崩れることはなく、また土留パネルが外れてしまうよう
なこともない。したがってその安全性について何等支承
はない。Here, when the second-stage soil retention panel is moved to the second stage after the completion of the first-stage soil retention panel (corresponding to the completion of one spiral pitch), the second-stage soil retention panel is immediately below the first-stage soil retention panel. The holes 8a are to be expanded for attachment. At this time, the soil retaining panels that have already made up the first stage are struck by the piles 12 on the inner surface 9 of the holes 8a, respectively. Since the panel will be entirely supported by the bottom of the hole 8a in the process of forming, it is necessary to expand the area immediately below the first stage by one soil retention panel in order to attach one second retention plate. However, the hole 8a does not collapse and the soil retaining panel does not come off. Therefore, there is no support for its safety.
【００２９】一段目の土留パネルの下に二段目の土留パ
ネル一枚を取り付けることができる程度に穴８ａを拡張
した後は、その拡張した穴８ａの内面９に二段目の最初
の土留パネルを嵌め込む。続いてその二段目の最初の土
留パネルと一段目の土留パネルとを上下方向に連結す
る。この連結は、上部のフランジ１４と一段目の土留パ
ネルの下部のフランジ１４とのボルト差込み穴１６，１
６に、下方から、鍵形ボルト１５を差し込み、鍵形ボル
ト１５の引掛け部分１５ａを上部のフランジ１４及び下
部のフランジ１４の先端端縁に係合させた状態で鍵形ボ
ルト１５にナット２１を取り付け、ナット２１の締め込
むという手順を経て終了する。After expanding the hole 8a to the extent that one second earth retaining panel can be attached under the first earth retaining panel, the first earth retaining second hole is attached to the inner surface 9 of the expanded hole 8a. Fit the panel. Subsequently, the first soil retaining panel on the second stage and the soil retaining panel on the first stage are connected in the vertical direction. This connection is made by bolt insertion holes 16, 1 between the upper flange 14 and the lower flange 14 of the first retaining plate.
6, the key-shaped bolt 15 is inserted from below, and the nut 21 is attached to the key-shaped bolt 15 with the hooked portion 15a of the key-shaped bolt 15 being engaged with the tip end edges of the upper flange 14 and the lower flange 14. , And tighten the nut 21 to complete the procedure.
【００３０】このように二段目から最終段までは、直上
段の土留パネルの下部フランジ１４とその下の土留パネ
ルの上部フランジ１４とを、鍵形ボルト１５，ナット２
１で上下に連結するという工程が増えることになるが、
このように常に土留パネル一枚分、鉄塔基礎穴８を掘り
進める度に、その掘削された鉄塔基礎穴８の内面９を覆
うべき土留パネルを取り付け、これをスパラル方向及び
上下方向において前後及び上の土留パネルと連結してそ
の重量を掘削中の鉄塔基礎穴８に支持させておくという
方法は、短い時間で円錘台形の鉄塔基礎穴８を安全に形
成することができる工法として非常に有益である。As described above, from the second stage to the final stage, the lower flange 14 of the soil retaining panel immediately above and the upper flange 14 of the soil retaining panel therebelow are connected to the key bolt 15 and the nut 2.
Although the process of connecting up and down with 1 will increase,
In this way, every time one earth retaining panel is dug in the steel tower foundation hole 8, a soil retaining panel that should cover the inner surface 9 of the excavated steel tower foundation hole 8 is attached, and this is attached to the front and rear and the upper and lower sides in the spiral direction and the vertical direction. The method in which the weight is supported by the steel tower foundation hole 8 under excavation by connecting with the soil retaining panel of is very useful as a method of safely forming the truncated cone-shaped steel tower foundation hole 8 in a short time. Is.
【００３１】尚、土留パネルは、一般の鋼板材で形成し
ても構わないが、特に運搬や作業性の面で軽量化を要求
されるような場合は、土留パネルを繊維強化樹脂（ＦＲ
Ｐ）で形成することもできる。The earth retaining panel may be formed of a general steel plate material, but when it is required to reduce the weight particularly in terms of transportation and workability, the earth retaining panel is made of a fiber reinforced resin (FR).
It can also be formed of P).
【００３２】[0032]
【発明の効果】以上説明したことから明らかなように本
発明によれば次の如き優れた効果を発揮する。As is clear from the above description, the present invention exhibits the following excellent effects.
【００３３】(1) 請求項１記載の発明によれば、転びの
ある鉄塔基礎を何等支承なく根入することができる。し
たがって鉄塔基礎を従来のように補強する必要がなく、
鉄塔全体のコストダウンが達成されその強度及び信頼性
が実質的に改善できる。(1) According to the invention described in claim 1, it is possible to root the steel tower foundation having a fall without any support. Therefore, there is no need to reinforce the steel tower foundation as before,
Cost reduction of the entire steel tower is achieved, and its strength and reliability can be substantially improved.
【００３４】(2) 請求項２記載の発明によれば、崩れが
生じることなく安全であり、短い時間で鉄塔基礎穴を円
錘台形に形成することができる。(2) According to the second aspect of the invention, it is safe without collapse and the tower tower base hole can be formed into a truncated cone shape in a short time.
【図１】本発明に係る鉄塔基礎穴の概略断面図である。FIG. 1 is a schematic sectional view of a steel tower foundation hole according to the present invention.
【図２】スパラル方向及び上下方向に沿って多数の土留
パネルを連結して成る土留壁の具体例を示す斜視図であ
る。FIG. 2 is a perspective view showing a concrete example of an earth retaining wall formed by connecting a large number of earth retaining panels along the spiral direction and the vertical direction.
【図３】土留パネルの連結構造の一例を示す要部斜視図
である。FIG. 3 is a perspective view of a main part showing an example of a connecting structure of a soil retaining panel.
【図４】従来の鉄塔基礎穴の形成方法を説明するための
概略図である。FIG. 4 is a schematic view for explaining a conventional method of forming a steel tower foundation hole.
８ 鉄塔基礎穴 ９ 内面 10-1,10-2,10-3, …,10-n-1,10n 土留パネル 8 Steel tower foundation hole 9 Inner surface 10-1,10-2,10-3,…, 10-n-1,10n Soil retaining panel
Claims (2)
台形に形成し、その鉄塔基礎穴の内面をその全面に亘っ
て多数の土留パネルで覆って成る鉄塔基礎穴。1. A steel tower foundation hole formed by forming a steel tower foundation hole into a truncated cone shape that spreads in the depth direction and covering the entire inner surface of the steel tower foundation hole with a large number of soil retaining panels.
記鉄塔基礎穴の軸芯線を中心とする鉄塔基礎穴内面に、
そのスパイラル方向に沿って順次接続可能にかつ上下方
向において接続可能に形成された土留パネルを多数準備
して掘削により、地面に上記鉄塔基礎穴を形成しつつ、
その鉄塔基礎穴の進行度が土留パネル一枚分の取り付け
を可能となる度に、掘削により形成された鉄塔基礎穴の
内面にこれに適合する土留パネルを逐次取り付けるよう
にしたことを特徴とする鉄塔基礎穴の形成方法。2. The steel tower foundation hole according to claim 1, wherein an inner surface of the steel tower foundation hole centered on an axis of the steel tower foundation hole is provided.
While preparing a large number of soil retaining panels that can be sequentially connected along the spiral direction and connectable in the vertical direction by excavation, while forming the steel tower foundation hole on the ground,
Each time the degree of progress of the steel tower foundation hole makes it possible to install one soil retaining panel, it is characterized by sequentially installing the soil retaining panel that fits the inner surface of the steel foundation hole formed by excavation. Method for forming a steel tower foundation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5155491A JPH0711861A (en) | 1993-06-25 | 1993-06-25 | Steel-tower foundation hole and forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5155491A JPH0711861A (en) | 1993-06-25 | 1993-06-25 | Steel-tower foundation hole and forming method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0711861A true JPH0711861A (en) | 1995-01-13 |
Family
ID=15607214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5155491A Pending JPH0711861A (en) | 1993-06-25 | 1993-06-25 | Steel-tower foundation hole and forming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0711861A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644292A (en) * | 2012-03-31 | 2012-08-22 | 上海市电力公司 | Inclined post pile foundation for overhead transmission line |
| CN110761954A (en) * | 2019-11-19 | 2020-02-07 | 中国电建集团西北勘测设计研究院有限公司 | Prefabricated concrete fan tower cylinder with spiral line connecting seam and connecting method |
-
1993
- 1993-06-25 JP JP5155491A patent/JPH0711861A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644292A (en) * | 2012-03-31 | 2012-08-22 | 上海市电力公司 | Inclined post pile foundation for overhead transmission line |
| CN110761954A (en) * | 2019-11-19 | 2020-02-07 | 中国电建集团西北勘测设计研究院有限公司 | Prefabricated concrete fan tower cylinder with spiral line connecting seam and connecting method |
| CN110761954B (en) * | 2019-11-19 | 2024-01-19 | 中国电建集团西北勘测设计研究院有限公司 | Precast concrete fan tower barrel with spiral line connecting seam and connecting method |
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