JP5391390B1 - Foundation steel pipes, rotary tools used for foundation steel pipes, and methods for their construction - Google Patents
Foundation steel pipes, rotary tools used for foundation steel pipes, and methods for their construction Download PDFInfo
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Abstract
【課題】電柱等の柱体を地盤に建柱する際に使用する基礎鋼管を土中に埋設する際、地盤の状況に応じて、施工方法を自在に変更することを可能とし、基礎鋼管と柱体との接続固定に必要な材料を軽減することで、迅速な建て替え工事を遂行することができる基礎鋼管、基礎鋼管に使用する回転工具及びこれらの施工方法を提供する。
【解決手段】基礎鋼管の上端に一対の支持金具を設けることで、複数の回転工具が使用可能となり、地盤の状況に応じて、アースオーガの回転によって基礎鋼管を地中に直接埋設するか、スクリュオーガによる掘削を行うかなど、最適な施工方法に施工途中でも随時切り替えることができる。さらに、支持金具に係止した吊り金具を用いることで、基礎鋼管の埋設作業に支障を与えずに、柱体の鉛直荷重を基礎鋼管に伝達することで、柱体との接続固定に必要な材料強度と量を軽減し迅速な施工を可能とする。
【選択図】図1
An object of the present invention is to make it possible to freely change the construction method according to the condition of the ground when embedding a foundation steel pipe to be used when building a pole body such as a utility pole on the ground, Provided are a basic steel pipe, a rotating tool used for the basic steel pipe, and a construction method thereof that can perform a quick rebuilding work by reducing the material necessary for fixing the connection to the column.
A plurality of rotary tools can be used by providing a pair of support fittings at the upper end of a foundation steel pipe, and depending on the ground conditions, the foundation steel pipe is directly buried in the ground by rotating an earth auger, You can switch to an optimal construction method at any time, even during construction, such as excavating with a screw auger. Furthermore, by using the suspension fittings that are locked to the support fittings, the vertical load of the column is transmitted to the foundation steel pipe without affecting the embedding work of the foundation steel pipe, which is necessary for fixing the connection to the pillar. Reduces material strength and quantity, enabling rapid construction.
[Selection] Figure 1
Description
本発明は、電柱等の柱体を地盤に建柱する際に使用する基礎鋼管に関するものであり、穴掘建柱車のアースオーガで回転圧入する基礎鋼管の先端に地盤を切削する先端爪を設けた基礎鋼管、基礎鋼管に使用する回転工具及びこれらの施工方法に関する。 The present invention relates to a foundation steel pipe used when a pole body such as a utility pole is built on the ground, and a tip claw for cutting the ground is provided at the tip of the foundation steel pipe that is rotationally press-fitted with an earth auger of a digging pillar car. The present invention relates to a foundation steel pipe, a rotary tool used for the foundation steel pipe, and a construction method thereof.
従来から、電柱を地盤に建柱する際、電柱用の基礎鋼管を地中に埋設するため、穴掘建柱車のスクリュオーガで基礎鋼管の長さに見合った先行穴を堀る必要がある。このような先行掘りを行う従来技術としては、特許文献1に記載されているように、鋼管製基礎構造の施工方法が案出されている。この施工法は、土壌の近傍に親管体(本発明の「基礎鋼管」に相当する)と子管体を埋設して互いに結合することにより、堅牢な基礎構造を得るようにしたものである。 Conventionally, when building a utility pole on the ground, in order to embed the foundation steel pipe for the utility pole in the ground, it is necessary to dig a leading hole corresponding to the length of the foundation steel pipe with the screw auger of the drilling pillar car . As a conventional technique for performing such prior digging, as described in Patent Document 1, a construction method for a steel pipe foundation structure has been devised. In this construction method, a solid pipe structure (corresponding to the “basic steel pipe” of the present invention) and a sub pipe body are embedded in the vicinity of the soil and bonded together to obtain a solid foundation structure. .
その親管体の埋設方法としては、穴掘建柱車に取り付けたスクリュオーガによって先行穴を掘削し、この先行穴に管体を挿入すると共に、管体先端付近の内部に突出固定された嵌合ピンにスクリュオーガの先端を係止し、オーガを回転することによって親管体を所定深さまで埋設するという施工法を有するものである。 As a method of burying the main pipe body, a leading hole is drilled by a screw auger attached to a drilling shaft, a pipe body is inserted into the leading hole, and a fitting that protrudes and is fixed to the inside of the vicinity of the pipe body. It has a construction method in which the tip of the screw auger is locked to the mating pin, and the parent tube body is buried to a predetermined depth by rotating the auger.
ところが、このように先行掘りを必要とする工法の場合、柔らかい地盤においては、周辺の地盤が緩み、また先行穴の崩壊を招く等の対策を必要とするため、迅速な建柱工事が妨げられるという問題があった。 However, in the case of a construction method that requires advance digging in this way, in soft ground, the surrounding ground is loosened, and measures such as leading to collapse of the preceding hole are required, thus preventing rapid column construction. There was a problem.
一方、最近における電柱等の建て替え工事は、全国的に老朽化した大量の電柱を対象としているため、非常に迅速な施工が要求され、上記のような先行掘りを必要とする工法では、施工の迅速化に限度があった。 On the other hand, the recent rebuilding work of utility poles, etc. is aimed at a large number of telephone poles that have become obsolete nationwide, so very quick construction is required. There was a limit to speed.
従って、先行掘りを必要としない施工法として、例えば、特許文献2に示すように、アースオーガ駆動部に備えられたオーガ角シャフトを基礎筒体(本発明の「基礎鋼管」に相当する)に設けた回転工具に接続し、アースオーガの回転によって基礎筒体を地中に直接埋設することが可能な施工方法も開発されている。 Therefore, as a construction method that does not require prior digging, for example, as shown in Patent Document 2, an auger angle shaft provided in an earth auger drive unit is used as a basic cylinder (corresponding to the “basic steel pipe” of the present invention). A construction method has also been developed in which a foundation cylinder can be directly buried in the ground by rotating an earth auger connected to a rotating tool provided.
ところが、施工現場には盛土地盤のように、深度で土壌が異なる地盤もあり、上記のようにアースオーガの回転圧入によって基礎鋼管を地中に直接埋設する方法では、地盤が硬質等の場合、基礎鋼管の埋設作業が効率的では無く、スクリュオーガによる先行堀り、もしくはスクリュオーガによる中堀り(鋼管内部の掘削)との併用が必要となる。このように、地盤によって施工方法を容易に変えることができる基礎鋼管の構造が実現できれば、現場の地盤状況に応じて迅速な電柱等の建て替え工事を遂行することが可能となる。 However, there are also soils with different soils at depths, such as embankments, at the construction site, and the method of directly embedding the foundation steel pipe in the ground by rotating press-fitting of the earth auger as described above, when the ground is hard, etc. The embedding work of the basic steel pipe is not efficient, and it is necessary to use it together with a prior excavation with a screw auger or an intermediate excavation with a screw auger (excavation inside the steel pipe). Thus, if the structure of the foundation steel pipe which can change a construction method easily according to the ground is realizable, it will become possible to carry out quick rebuilding work, such as a utility pole, according to the ground condition of the field.
本発明は上記の事情に鑑みてなされたものであり、電柱等の柱体を地盤に建柱する際に使用する基礎鋼管を土中に埋設する際、アースオーガの回転によって基礎鋼管を地中に直接埋設するか、スクリュオーガによる掘削を行うかなど、地盤の状況に応じて自在に使い分けることが可能となり、更に柱体を基礎鋼管上部に係止し、コンクリートを使用せずに柱体を固定することにより、迅速な建て替え工事を遂行することができる基礎鋼管、基礎鋼管に使用する回転工具及びこれらの施工方法を提供することを目的とする。 The present invention has been made in view of the above circumstances, and when a foundation steel pipe used for laying a pillar such as a utility pole on the ground is buried in the ground, the foundation steel pipe is grounded by rotation of the earth auger. It is possible to use them freely according to the ground conditions, such as whether to embed them directly in the pipe or to perform excavation with a screw auger.In addition, the pillars can be locked to the upper part of the foundation steel pipe, and the pillars can be attached without using concrete. It aims at providing the foundation steel pipe which can carry out quick rebuilding construction by fixing, the rotary tool used for a foundation steel pipe, and these construction methods.
上記の目的を達成するために、本発明の請求項1に記載の基礎鋼管は、地盤に回転圧入する鋼管の下端の周部に間隔をあけて複数の先端爪を設けてなる基礎鋼管において、該基礎鋼管の上端の周部の直径方向に対向した位置に第1の回転工具又は第2の回転工具を取り付ける一対の支持金具を基礎鋼管の上端から上方へ突出状態に固定すると共に、該突出してなる各支持金具の突出部に貫通穴と上方を開放した凹溝とを形成し、第1の回転工具は、工具本体の中央上部に穴掘建柱車に取り付けられたオーガ角シャフトの先端を挿着する角形穴が設けられ、工具本体の両端に基礎鋼管の一対の支持金具の各貫通穴に挿脱自在に係止される一対のストッパロッドが設けられた構成を有し、第2の回転工具は、工具本体の中央上部に穴掘建柱車に取り付けられたスクリュオーガの先端を挿着する穴部が設けられ、該穴部の両側近傍にスクリュオーガの螺旋翼の先端を係止する係止部材が設けられ、さらに工具本体の両端に基礎鋼管の一対の支持金具の各凹溝に着脱自在に挿着される係止端部が設けられた構成を有することを特徴とする。 In order to achieve the above object, the basic steel pipe according to claim 1 of the present invention is a basic steel pipe in which a plurality of tip claws are provided at intervals in the peripheral portion of the lower end of the steel pipe that is rotationally pressed into the ground. A pair of support fittings to which the first rotary tool or the second rotary tool is attached at a position facing the diametrical direction of the peripheral portion of the upper end of the basic steel pipe are fixed in a protruding state upward from the upper end of the basic steel pipe, and the protruding A through hole and a recessed groove opened upward are formed in the protruding portion of each support fitting, and the first rotary tool is provided at the tip of an auger angle shaft attached to the drilling column at the center upper part of the tool body. And a pair of stopper rods that are removably engaged with the through holes of the pair of support fittings of the basic steel pipe at both ends of the tool body, The rotary tool is installed in the drilling column at the upper center of the tool body. A hole for inserting the tip of the attached screw auger is provided, a locking member for locking the tip of the screw blade of the screw auger is provided in the vicinity of both sides of the hole, and a basic steel pipe is provided at both ends of the tool body. It has the structure provided with the latching | locking edge part detachably inserted in each concave groove of a pair of support metal fittings.
また、本発明の請求項2に記載の基礎鋼管は、請求項1において、基礎鋼管の上端から上方へ突出状態に固定した一対の支持金具の突出部に形成した貫通穴の形成位置は、地盤の上面に横倒し状態で設置された基礎鋼管の一対の支持金具の各貫通穴に第1の回転工具の両端のストッパロッドを挿着した状態で該回転工具を回動することによって第1の回転工具の角形穴を垂直上方に向け、該角形穴に穴掘建柱車のブームの上端から垂直下方に吊り下げたオーガ角シャフトの先端を挿着することができる位置であることを特徴とする。 Further, in the basic steel pipe according to claim 2 of the present invention, the formation position of the through hole formed in the protruding portion of the pair of support fittings fixed in the protruding state upward from the upper end of the basic steel pipe in claim 1 is the ground First rotation by rotating the rotary tool with the stopper rods at both ends of the first rotary tool inserted into the through holes of the pair of support fittings of the foundation steel pipe installed on the upper surface of the steel tube The tool is characterized in that the square hole of the tool is directed vertically upward, and the tip of the auger square shaft suspended vertically downward from the upper end of the boom of the digging column car can be inserted into the square hole. .
また、本発明の請求項3に記載の基礎鋼管は、請求項1又は2において、地盤に回転圧入した基礎鋼管の一対の支持金具の各凹溝に係止する上端係止部と両側の上端係止部から所定長さだけ下方に延長すると共に凹形状に形成された下端支持部を有する吊り金具を基礎鋼管の内部に吊り下げた状態に設け、該吊り金具の下端支持部に柱体の下端を係止するようにしたことを特徴とする。 Further, the basic steel pipe according to claim 3 of the present invention is the base steel pipe according to claim 1 or 2, wherein the upper end locking portion and the upper end on both sides are engaged with each concave groove of the pair of support fittings of the basic steel pipe that is rotationally press-fitted into the ground. A suspension fitting having a lower end supporting portion formed in a concave shape and extending downward from the locking portion by a predetermined length is provided in a state of being suspended inside the basic steel pipe, and a column body is provided on the lower end supporting portion of the suspension fitting. The lower end is locked.
また、本発明の請求項4に記載の基礎鋼管に使用する回転工具は、地盤に回転圧入する鋼管の下端の周部に間隔をあけて複数の先端爪を設けた基礎鋼管の上端の周部の直径方向に対向した位置に一対の支持金具が固定され、各支持金具に取り付けられる回転工具であって、地盤が軟質等の場合に使用する第1の回転工具は、一対の支持金具の間に収まる工具本体の中央上部に穴掘建柱車のオーガ角シャフトの先端を挿着する角形穴と該角形穴に挿着したオーガ角シャフトの先端を係止するストッパピンとが設けられ、回転工具の両端に各支持金具の貫通穴に係止されるストッパロッドと該ストッパロッドを外方へ付勢する弾発バネとが設けられ、さらに工具本体の両部に各ストッパロッドを弾発バネの弾性に抗して引き込み操作するレバーと各ストッパロッドが外方へ突出した状態を係止するストッパプレートとが設けられていることを特徴とする。 Moreover, the rotary tool used for the foundation steel pipe of Claim 4 of this invention is the periphery of the upper end of the foundation steel pipe which provided the some front-end | tip claw at intervals in the periphery of the lower end of the steel pipe rotationally press-fitted into the ground. A pair of support brackets are fixed at positions opposed to each other in the diametrical direction, and the first rotary tool used when the ground is soft or the like is attached to each support bracket. In the center upper part of the tool body that fits in, a square hole that inserts the tip of the auger angle shaft of the drilling column car and a stopper pin that locks the tip of the auger angle shaft that is inserted in the square hole are provided, and the rotary tool Stopper rods that are locked to the through holes of the respective support fittings and elastic springs that urge the stopper rods outward are provided at both ends of each of the support brackets. Lever that pulls in against elasticity Characterized in that the stopper plate to lock the state of the stopper rod protrudes outward is provided.
また、本発明の請求項5に記載の基礎鋼管に使用する回転工具は、地盤に回転圧入する鋼管の下端の周部に間隔をあけて複数の先端爪を設けた基礎鋼管の上端の周部の直径方向に対向した位置に一対の支持金具が固定され、各支持金具に取り付けられる回転工具であって、地盤が硬質の場合に使用する第2の回転工具は、一対の支持金具の間に収まる工具本体の中央上部に穴掘建柱車に取り付けられたスクリュオーガの先端を挿着する穴部と該穴部の両側近傍にスクリュオーガの螺旋翼の先端を係止する係止部材が設けられ、工具本体の両端に支持金具の各凹溝に着脱自在に挿着される係止端部が設けられ、さらに各係止端部の上部にハンドルによって回動する係止片と、各係止片を基礎鋼管の一対の支持金具の各凹溝の内側部に設けられた凹部に係止させるようにしたことを特徴とする。 Moreover, the rotary tool used for the basic steel pipe according to claim 5 of the present invention is a peripheral portion of the upper end of the basic steel pipe in which a plurality of tip claws are provided at intervals in the peripheral portion of the lower end of the steel pipe that is rotationally press-fitted into the ground. A pair of support brackets are fixed at positions opposed to each other in the diameter direction of the rotary tool attached to each support bracket, and the second rotary tool used when the ground is hard is provided between the pair of support brackets. A hole that inserts the tip of the screw auger attached to the drilling column car and a locking member that locks the tip of the screw blade of the screw auger are provided in the vicinity of both sides of the hole at the upper center of the tool body. A locking end portion is provided at both ends of the tool body so as to be removably inserted into each concave groove of the support bracket, and further, a locking piece that is rotated by a handle at the top of each locking end portion, A stop piece was provided on the inner side of each concave groove of a pair of support fittings of the foundation steel pipe. Characterized in that so as to engaged with the part.
また、本発明の請求項6に記載の基礎鋼管の施工方法は、地盤に回転圧入する鋼管の下端の周部に間隔をあけて複数の先端爪を設けた基礎鋼管の施工方法において、地盤が軟質等の場合、第1の回転工具を用い、地盤に横倒した状態の基礎鋼管の一対の支持金具の各貫通穴に第1の回転工具の両端に設けた各ストッパロッドを係止し、第1の回転工具を回動することによって工具本体の中央上部に設けてある角形穴を垂直上方に向けた後、該角形穴に穴掘建柱車のブームの上端から垂直下方に吊り下げたオーガ角シャフトの先端を挿着し、この状態でオーガ角シャフトを回転することによって地盤に立てた基礎鋼管を地中に捩じ込んだ後、この地中に埋設した基礎鋼管の一対の支持金具の各凹溝に吊り金具の両端上部の上端係止部を係止して基礎鋼管の内部に吊り下げた吊り金具の下端支持部に柱体の下端を係止した状態にし、柱体と基礎鋼管との隙間に発生土もしくは砂を充填し、上部に砕石を投入して固定剤を流し込むことによって硬化させたことを特徴とする。 Moreover, the construction method of the foundation steel pipe of Claim 6 of this invention is the construction method of the foundation steel pipe which provided the some front-end | tip claw at intervals in the peripheral part of the lower end of the steel pipe rotationally press-fitted into the ground, In the case of soft or the like, the first rotating tool is used, and the stopper rods provided at both ends of the first rotating tool are locked in the through holes of the pair of support fittings of the foundation steel pipe that is laid down on the ground. An auger suspended vertically downward from the upper end of the boom of the digging pillar car after turning the square tool provided in the upper center of the tool body vertically upward by turning the rotary tool 1 After inserting the tip of the square shaft and rotating the auger angle shaft in this state, the foundation steel pipe standing on the ground is screwed into the ground, and then a pair of support fittings for the foundation steel pipe buried in this ground Engage the upper end locking part at the top of both ends of the suspension bracket in each concave groove. The bottom end of the column is locked to the lower end support of the suspension fitting suspended inside the foundation steel pipe, the generated soil or sand is filled in the gap between the column and the foundation steel pipe, and crushed stone is thrown into the top. It is characterized by being cured by pouring a fixative.
さらに、本発明の請求項7に記載の基礎鋼管の施工方法は、地盤に回転圧入する鋼管の下端の周部に間隔をあけて複数の先端爪を設けた基礎鋼管の施工方法において、地盤が硬質の場合、第2の回転工具を用い、穴掘建柱車に取り付けられたスクリュオーガによって地盤に基礎鋼管に見合った深さの先行掘りによる先行穴を掘削した後、第2の回転工具の両端に設けた係止端部を基礎鋼管の一対の支持金具の各凹溝に係止すると共に、各係止端部に設けた係止片をハンドル操作によって回動することにより一対の支持金具の各凹溝の内側に設けた凹部に係止した状態にして、穴掘建柱車に取り付けられたスクリュオーガの先端を第2の回転工具の中央上部に設けられた穴部に挿着すると共に該スクリュオーガの螺旋翼の先端を第2の回転工具に設けられた各係止部材に係止した状態で、該スクリュオーガを回転することによって基礎鋼管を先行穴に捩じ込むことによって地中に埋設した基礎鋼管の一対の支持金具の各凹溝に吊り金具の両端上部の上端係止部を係止して基礎鋼管の内部に吊り下げた吊り金具の下端支持部に柱体の下端を係止した状態にし、柱体と基礎鋼管との隙間に発生土もしくは砂を充填し、上部に砕石を投入して固定剤を流し込むことによって硬化させたことを特徴とする。 Furthermore, the construction method of the foundation steel pipe of Claim 7 of this invention is the construction method of the foundation steel pipe which provided the some front-end | tip nail at intervals in the peripheral part of the lower end of the steel pipe rotationally press-fitted into the ground, If it is hard, use the second rotary tool to drill the preceding hole by the pre-drilling of the depth corresponding to the foundation steel pipe in the ground with the screw auger attached to the drilling pillar, and then A pair of support brackets are provided by locking the latching end portions provided at both ends to the respective concave grooves of the pair of support brackets of the basic steel pipe and rotating the latching pieces provided at the respective latching end portions by a handle operation. The tip of the screw auger attached to the drilling column car is inserted into the hole provided in the upper center of the second rotary tool in a state of being locked in the recess provided inside each of the concave grooves. And the tip of the spiral wing of the screw auger as a second rotary tool In a state of being locked to each of the provided locking members, by rotating the screw auger, the base steel pipe is screwed into the preceding hole, thereby being embedded in each concave groove of the pair of support fittings of the base steel pipe buried in the ground. The upper end locking part at the upper end of both ends of the hanging bracket is locked and the lower end of the column is locked to the lower end support of the hanging bracket suspended inside the foundation steel pipe. It is characterized in that it is filled with generated soil or sand, hardened by pouring crushed stone into the upper part and pouring a fixing agent.
本発明によれば、電柱等の柱体を地盤に建柱する際に使用する基礎鋼管を土中に埋設する際、地盤が軟質等の場合、基礎鋼管の上端に設けた一対の支持金具に第1の回転工具を取り付けることにより、スクリュオーガを介することなくアースオーガ駆動部の回転力を直接基礎鋼管に伝達でき、更に地中に挿入する基礎鋼管を上下に細かく揺動することが可能となるため、先行掘りを行わずに、アースオーガの回転によって基礎鋼管を地中に直接埋設することが可能となる。 According to the present invention, when a foundation steel pipe used for laying a pillar such as a utility pole on the ground is buried in the soil, when the ground is soft, the pair of support fittings provided at the upper end of the foundation steel pipe By attaching the first rotating tool, the rotational force of the earth auger drive part can be transmitted directly to the foundation steel pipe without going through the screw auger, and further, the foundation steel pipe inserted into the ground can be rocked up and down finely. Therefore, it becomes possible to embed the basic steel pipe directly in the ground by rotating the earth auger without performing prior digging.
更に、基礎鋼管の上端に設けた一対の支持金具に第1の回転工具を取り付けることにより、特許文献1記載の折り曲げ式ジョイント、ならびに特許文献2記載の回転工具を使用する場合と比較して、横倒し状態の基礎鋼管を容易かつ安全に結合でき、作業の効率化を図ることが可能となる。 Furthermore, by attaching the first rotary tool to a pair of support fittings provided at the upper end of the foundation steel pipe, compared to the case of using the folding joint described in Patent Document 1 and the rotary tool described in Patent Document 2, It is possible to easily and safely join the foundation steel pipes in a lying state, and to improve the work efficiency.
また、地盤が硬質等の場合、まずスクリュオーガによる先行掘りを行うことによって先行穴を形成し、基礎鋼管の上端に設けた両側の支持金具に第2の回転工具を取り付けることにより、先行穴にアースオーガの回転圧入によって基礎鋼管を地中に埋設することが可能となる。さらに、このように先行穴にアースオーガを回転圧入する際、基礎鋼管の内部に土砂が入って閉塞された状態となり、基礎鋼管の挿入が困難となった場合等においても、スクリュオーガの脱着作業が不要なため、基礎鋼管内部を掘削(中堀り)する工程への切り替え作業の効率化を図ることが可能となる。 Also, if the ground is hard, etc., first form a preceding hole by performing a pre-drilling with a screw auger, and attach a second rotary tool to the support brackets on both sides provided at the upper end of the foundation steel pipe. The foundation steel pipe can be buried in the ground by rotating the earth auger. Furthermore, when the earth auger is rotationally press-fitted into the preceding hole, the screw auger can be removed even when the foundation steel pipe is in a closed state due to earth and sand becoming blocked. Therefore, it is possible to improve the efficiency of the switching work to the process of excavating (introducing) the inside of the basic steel pipe.
従って、本発明によれば、電柱等の柱体を地盤に建柱する際に使用する基礎鋼管を地中に埋設する際、地盤の状況に応じて、アースオーガの回転によって基礎鋼管を地中に直接埋設するか、スクリュオーガによる掘削を行うかなど、施工途中であっても最適な施工方法に随時切り替えることができるため、迅速な建て替え工事を遂行することが可能となる。 Therefore, according to the present invention, when embedding a foundation steel pipe to be used when building a pole body such as a utility pole on the ground, the foundation steel pipe is submerged by rotation of the earth auger according to the situation of the ground. It is possible to switch to the optimum construction method at any time, even during the construction, such as whether to embed directly in the machine or to perform excavation with a screw auger, so that a quick rebuilding work can be performed.
さらに、本発明によれば、基礎鋼管の支持金具に係止する吊り金具に、柱体の下端を係止することで、柱体に加わる鉛直方向荷重を基礎に確実に伝達することが可能となり、柱体の根入れ長さの短尺化が可能となり、柱体との固定に必要な充填材の強度と使用量の軽減が可能となる。 Furthermore, according to the present invention, the vertical load applied to the column can be reliably transmitted to the foundation by locking the lower end of the column to the suspension fitting to be locked to the support fitting of the basic steel pipe. The length of the column body can be shortened, and the strength and use amount of the filler necessary for fixing to the column body can be reduced.
従って、本発明によれば、基礎鋼管の内部に吊り下げた吊り金具を使用することで、柱体と基礎鋼管との隙間に発生土もしくは砂を充填した上部に砕石を投入し、その隙間に固定剤を流し込んだ状態で硬化させることによって柱体を固定することができるため、多量の生コンクリートの搬入を行わずに、迅速な工事が可能となる。 Therefore, according to the present invention, by using the hanging metal fittings hung inside the foundation steel pipe, the crushed stone is thrown into the upper portion where the generated soil or sand is filled in the gap between the column body and the foundation steel pipe, Since the column body can be fixed by curing in a state in which the fixing agent is poured, rapid construction is possible without carrying in a large amount of ready-mixed concrete.
本発明は、図1に示すように電柱等の柱体Pを地盤Gに建柱する際、地盤Gに回転圧入する管体1aの下端の周部に間隔をあけて複数の先端爪2を設けた基礎鋼管1を使用するものである。 In the present invention, when a pole body P such as a utility pole is built on the ground G as shown in FIG. 1, a plurality of tip claws 2 are provided at intervals in the periphery of the lower end of the tubular body 1 a that is rotationally press-fitted into the ground G. The provided basic steel pipe 1 is used.
本発明においては、基礎鋼管1を埋設すべき地盤Gの状態(軟質又は硬質の違い等)に応じて、後述する実施例1と実施例2に示す第1の回転工具3(図4参照)又は第2の回転工具4(図9参照)を使い分けることによって、地盤Gの状況に応じて迅速な建柱工事を可能とするものである。 In the present invention, the first rotary tool 3 shown in Example 1 and Example 2 described later (see FIG. 4) according to the state of the ground G in which the foundation steel pipe 1 is to be embedded (difference in softness or hardness). Or by using the 2nd rotary tool 4 (refer FIG. 9) properly, according to the condition of the ground G, a rapid pillar construction is enabled.
従って、本発明では、後述するいずれの実施例においても、図1又は図2に示す基礎鋼管1と図1又は図3に示す吊り金具5とを使用するため、まず、これらの基礎鋼管1と吊り金具5について説明する。 Accordingly, in the present invention, in any of the embodiments to be described later, since the basic steel pipe 1 shown in FIG. 1 or FIG. 2 and the hanging metal fitting 5 shown in FIG. 1 or FIG. The hanging metal fitting 5 will be described.
基礎鋼管1は、図2(a)〜(e)に示すように、基礎鋼管1の上端の周部において直径方向に対向せる位置に支持金具6を上方へ突出状態に固定し、各支持金具6の突出部6aに貫通穴7と上方を開放した凹溝8とが形成されている。 As shown in FIGS. 2 (a) to 2 (e), the base steel pipe 1 is fixed so that the support metal fitting 6 protrudes upward at a position facing the diametrical direction at the upper end of the base steel pipe 1. A through hole 7 and a concave groove 8 that opens upward are formed in the protruding portion 6 a of 6.
即ち、上記の基礎鋼管1は、例えば鋼材を用いて円筒形に形成され、図2(a)、(b)又は(d)に示すように、基礎鋼管1の上端付近の外周には複数のアングル部材9aによって補強された鍔形状のフランジ9が固定されている。そして、図2(b)に示すように、フランジ9の上部における基礎鋼管1の上端の周部において直径方向に対向せる位置に支持金具6、6が固定されている。 That is, the above-described basic steel pipe 1 is formed into a cylindrical shape using, for example, a steel material, and a plurality of pieces are provided on the outer periphery in the vicinity of the upper end of the basic steel pipe 1 as shown in FIG. 2 (a), (b) or (d). A flange-shaped flange 9 reinforced by an angle member 9a is fixed. As shown in FIG. 2 (b), the support fittings 6, 6 are fixed at positions that face each other in the diametrical direction at the periphery of the upper end of the basic steel pipe 1 at the top of the flange 9.
各支持金具6は、図2(d)に示すように、矩形の金属板を使用して基礎鋼管1の上方へ突出状態に溶接等で固定してあり、その突出部6aの端部に、後述する第1の回転工具3に設けられたストッパロッド10を挿着する貫通穴7が形成され、その隣設位置には上方を開放した凹溝8が形成されている。 As shown in FIG. 2 (d), each support fitting 6 is fixed by welding or the like in a protruding state above the basic steel pipe 1 using a rectangular metal plate, and at the end of the protruding portion 6a, A through hole 7 into which a stopper rod 10 provided in a first rotary tool 3 described later is inserted is formed, and a concave groove 8 having an open top is formed at an adjacent position.
上記の基礎鋼管1の上端から上方へ突出状態に固定した一対の支持金具6、6の突出部6a、6aに形成した貫通穴7、7の形成位置は、次のようにするのが好ましい。即ち、図7(a)に示すように、地盤Gの上面に横倒し状態で設置された基礎鋼管1の一対の支持金具6、6の各貫通穴7、7に後述する第1の回転工具3の両端のストッパロッド10、10を挿着した状態で該回転工具3を回動することによって第1の回転工具3に設けられた角形穴16を垂直上方に向け、該角形穴16に穴掘建柱車C(図8(a)参照)のブームBの上端から垂直下方に吊り下げたオーガ角シャフトSの先端を挿着することができる位置とする必要がある。 The formation positions of the through holes 7 and 7 formed in the protruding portions 6a and 6a of the pair of support fittings 6 and 6 fixed in a protruding state upward from the upper end of the basic steel pipe 1 are preferably as follows. That is, as shown in FIG. 7 (a), the first rotary tool 3 described later is inserted into each of the through holes 7 and 7 of the pair of support fittings 6 and 6 of the foundation steel pipe 1 installed on the upper surface of the ground G in a laid state. When the rotary tool 3 is rotated with the stopper rods 10 and 10 at both ends thereof being inserted, the square hole 16 provided in the first rotary tool 3 is directed vertically upward, and the square hole 16 is dug. The end of the auger angle shaft S suspended vertically downward from the upper end of the boom B of the building column C (see FIG. 8 (a)) needs to be positioned so that it can be inserted.
なお、図7(b)に示すように、基礎鋼管1の上端に固定した一対の支持金具6、6が基礎鋼管1の上端から上方に突出する位置が低く、貫通穴7、7の形成位置が適正でない場合、オーガ角シャフトSが基礎鋼管1の端部に当たって垂直状態に取り付けることが不可能である。このため、穴掘建柱車C(図8(a)参照)のブームBの上端から垂直下方に吊り下げたオーガ角シャフトSを第1の回転工具3に設けられた角形穴16に挿着しようとすると、オーガ角シャフトSが斜めの状態となり作業が困難となる。 In addition, as shown in FIG.7 (b), the position where a pair of support metal fittings 6 and 6 fixed to the upper end of the foundation steel pipe 1 protrude upwards from the upper end of the foundation steel pipe 1 is low, and the formation position of the through holes 7 and 7 Is not appropriate, it is impossible to attach the auger angle shaft S to the end of the foundation steel pipe 1 in a vertical state. For this reason, the auger square shaft S suspended vertically downward from the upper end of the boom B of the digging column car C (see FIG. 8A) is inserted into the square hole 16 provided in the first rotary tool 3. Attempting to do so makes the auger angle shaft S in an oblique state, making the operation difficult.
また、図7(c)に示すように、基礎鋼管1の上端に支持金具6を設けることなく、基礎鋼管1の上端に直接形成した貫通穴7に第1の回転工具3を取り付けた場合もまた、オーガ角シャフトSが基礎鋼管1の端部に当たって挿着作業が更に困難となる。 Moreover, as shown in FIG.7 (c), the case where the 1st rotary tool 3 is attached to the through-hole 7 directly formed in the upper end of the basic steel pipe 1, without providing the support metal fitting 6 in the upper end of the basic steel pipe 1. Further, the auger angle shaft S hits the end of the basic steel pipe 1, and the insertion work becomes more difficult.
また、上記の支持金具6に設けられた凹溝8は、後述する第2の回転工具4の係止端部11を挿脱自在に挿着する凹形状に形成され、この凹溝8の内側には、後述する上記の係止端部11の上部に設けられたハンドル12によって回動する係止片13を係止する凹部14が形成されている。 Further, the concave groove 8 provided in the support metal fitting 6 is formed in a concave shape for detachably inserting a locking end portion 11 of the second rotary tool 4 described later. A recess 14 is formed for locking a locking piece 13 that is rotated by a handle 12 provided on the upper portion of the locking end 11 described later.
また、図2(c)又は(e)に示すように、基礎鋼管1の下端の周部には間隔をあけて複数の先端爪2が設けられている。本実施例では、基礎鋼管1の下端の外周面に沿って等間隔で4個の先端爪2を固定した構成としているが、他の複数個の先端爪2を設けるようにしてもよい。なお、基礎鋼管1の外径をスクリュオーガS2より一回り大きな外径に形成することにより、先行堀りの場合、地盤に対し基礎鋼管1が不安定とならないように先端爪2が先行穴Hの壁面を削りながら地盤に挿入される。 Moreover, as shown in FIG.2 (c) or (e), the front-end | tip nail | claw 2 is provided in the peripheral part of the lower end of the basic steel pipe 1 at intervals. In the present embodiment, four tip claws 2 are fixed at equal intervals along the outer peripheral surface of the lower end of the basic steel pipe 1, but other plural tip claws 2 may be provided. In addition, by forming the outer diameter of the foundation steel pipe 1 to be slightly larger than the screw auger S2, in the case of preceding drilling, the tip claw 2 is provided with the leading hole H so that the foundation steel pipe 1 does not become unstable with respect to the ground. It is inserted into the ground while shaving the wall surface.
さらに、本実施例の吊り金具5は、図3(a)〜(d)に示すように、基礎鋼管1の管体1aの上端の各支持金具6の凹溝8に係止する上端係止部5aと両側の上端係止部5a、5aから所定長さだけ下方に延長して凹形状を形成すると共に、その下部に角パイプで形成した下端支持部5bが設けられた構成とされている。そして、図3(d)に示すように、この吊り金具5を上記のようにして基礎鋼管1の内部に吊り下げ状態で設置し、図1に示すように、吊り金具5の下端支持部5bに柱体Pの下端を係止することによって柱体Pを立設する。 Further, as shown in FIGS. 3A to 3D, the hanging metal fitting 5 of the present embodiment is engaged with the upper end latching that is engaged with the concave groove 8 of each support fitting 6 at the upper end of the tubular body 1 a of the basic steel pipe 1. A concave shape is formed by extending downward by a predetermined length from the portion 5a and the upper end locking portions 5a, 5a on both sides, and a lower end support portion 5b formed by a square pipe is provided below the concave shape. . Then, as shown in FIG. 3 (d), the suspension metal fitting 5 is installed in a suspended state inside the basic steel pipe 1 as described above. As shown in FIG. 1, the lower end support portion 5b of the suspension metal fitting 5 is provided. The column body P is erected by locking the lower end of the column body P to the bottom.
この実施例では、軟質地盤Gに基礎鋼管1を埋設する際に使用する第1の回転工具3の構造及びこれらの施工方法について説明する。この第1の回転工具3は、図4及び図5に示すように、工具本体3aの中央上部に、後述する穴掘建柱車Cに取り付けられたオーガ角シャフトSの先端を挿着する角形穴16と、工具本体3aの両端に設けられ、基礎鋼管1の両側の支持金具6の各貫通穴7に挿脱自在に係止される一対のストッパロッド10とを有する構成とされている(図6参照)。 In this embodiment, the structure of the first rotary tool 3 used when the foundation steel pipe 1 is embedded in the soft ground G and the construction method thereof will be described. As shown in FIGS. 4 and 5, the first rotary tool 3 has a square shape in which a tip of an auger angle shaft S attached to a digging pillar car C described later is inserted into an upper center portion of a tool body 3 a. It is configured to have a hole 16 and a pair of stopper rods 10 provided at both ends of the tool body 3a and removably locked in the through holes 7 of the support fitting 6 on both sides of the basic steel pipe 1 ( (See FIG. 6).
このような第1の回転工具3について詳細に説明すると、図4に示すように、基礎鋼管1の両側の支持金具6の間に収まる長さの工具本体3a(図6参照)の中央上部には、上方へ突出した保持体3bが形成され、この保持体3bに穴掘建柱車Cのオーガ角シャフトSの先端を挿着する角形穴16が形成されている。なお、図5(b)に示すように、保持体3bの底部にも角形穴16aが形成されており、後述するようにオーガ角シャフトSを任意の高さで固定することが可能である。 The first rotary tool 3 will be described in detail. As shown in FIG. 4, the tool body 3 a (see FIG. 6) having a length that fits between the support brackets 6 on both sides of the basic steel pipe 1 A holding body 3b projecting upward is formed, and a square hole 16 into which the tip of the auger angle shaft S of the digging column car C is inserted is formed in the holding body 3b. As shown in FIG. 5B, a square hole 16a is also formed in the bottom of the holding body 3b, and the auger angle shaft S can be fixed at an arbitrary height as will be described later.
また、図5(a)〜(c)に示すように、保持体3bの側部に角形穴16の方向に形成された挿通穴3cが形成され、この挿通穴3cに弾性バネ3dによって弾発される締結用取手17のストッパピン17aを挿着したことによって、該ストッパピン17aを角形穴16に挿入したオーガ角シャフトSの係止穴S1に挿着し、これによってオーガ角シャフトSが角形穴16から抜け出すことを防止するストッパとして機能することが可能である。なお、オーガ角シャフトSの係止穴S1は、図4に示すように、所定間隔で複数形成されており、上記のように、オーガ角シャフトSを保持体3bの上方の角形穴16から底部の角形穴16aの方向に挿入して、任意の高さで固定することが可能である。 Further, as shown in FIGS. 5 (a) to 5 (c), an insertion hole 3c formed in the direction of the square hole 16 is formed in the side portion of the holding body 3b, and the elastic spring 3d is elastically formed in the insertion hole 3c. By inserting the stopper pin 17a of the fastening handle 17 to be connected, the stopper pin 17a is inserted into the locking hole S1 of the auger angle shaft S inserted into the square hole 16, so that the auger angle shaft S is square. It can function as a stopper that prevents the hole 16 from slipping out. As shown in FIG. 4, a plurality of locking holes S1 of the auger angle shaft S are formed at predetermined intervals. As described above, the auger angle shaft S is moved from the square hole 16 above the holding body 3b to the bottom portion. It can be inserted in the direction of the rectangular hole 16a and fixed at an arbitrary height.
さらに、第1の回転工具3の工具本体3aの両端に形成された内通部18には、上記の支持金具6の貫通穴7に係止されるストッパロッド10が出し入れ可能に挿入されている。また、工具本体の両端に形成された各内通部18の奥部には、ストッパロッド10を外方へ付勢する弾発バネ19が内蔵されると共に、ストッパロッド10を弾発バネ19の弾性に抗して引き込み操作するレバー20が上方へ突出した状態で設けられている。 Furthermore, the stopper rod 10 latched by the through-hole 7 of the said support metal fitting 6 is inserted in the internal passage part 18 formed in the both ends of the tool main body 3a of the 1st rotary tool 3 so that insertion / extraction is possible. . A resilient spring 19 for urging the stopper rod 10 outward is incorporated in the inner part of each inner passage 18 formed at both ends of the tool body, and the stopper rod 10 is attached to the resilient spring 19. A lever 20 that is pulled in against the elasticity is provided in a state of protruding upward.
さらに、レバー20を引き込み動作させる移動用溝21に上方から挿着する板形状のストッパプレート22(図5(d)参照)を設ける。なお、このストッパプレート22の側部には、このストッパ22を移動用溝21に挿入したときの挿入深さを規制する段差22aと工具本体3aに固定されたバンド22c(図4参照)の他端を係止する穴部22bが設けられている。 Further, a plate-shaped stopper plate 22 (see FIG. 5D) is provided to be inserted from above into the moving groove 21 for pulling the lever 20 in. The side of the stopper plate 22 includes a step 22a for restricting the insertion depth when the stopper 22 is inserted into the moving groove 21 and a band 22c (see FIG. 4) fixed to the tool body 3a. A hole 22b for locking the end is provided.
上記の構成により、ストッパ22を移動用溝21から抜き出した状態で、例えば第1の回転工具3の各レバー20を弾発バネ19の弾性に抗して内方へ引き込むことにより、ストッパロッド10を工具本体3aの内方へ収納する。このような操作によって、図6(a)〜(c)に示すように、各ストッパロッド10を基礎鋼管1の両側の支持金具6、6の貫通穴7、7に挿入して係止し、レバー20の移動用溝21にストッパプレート22を上方から挿着しバンド22cにより外れ止めとすることによって、各ストッパロッド10の不意の引き込み動作を停止することが可能となる。 With the above configuration, with the stopper 22 extracted from the moving groove 21, for example, each lever 20 of the first rotary tool 3 is pulled inward against the elasticity of the spring spring 19, thereby stopping the stopper rod 10. Is stored inside the tool body 3a. By such an operation, as shown in FIGS. 6A to 6C, the stopper rods 10 are inserted into the through holes 7 and 7 of the support fittings 6 and 6 on both sides of the basic steel pipe 1 and locked. By inserting the stopper plate 22 into the movement groove 21 of the lever 20 from above and preventing the stopper plate 22 from coming off by the band 22c, the unexpected pull-in operation of each stopper rod 10 can be stopped.
上記の第1の回転工具3を使用して柱体Pを建柱するには、地盤Gが軟質等である場合、図8(a)に示すように、第1の回転工具3の角形穴16に穴掘建柱車C(図8(a)参照)に取り付けられたオーガ角シャフトSの先端を挿着する(図4参照)と共に、上記の図6に示すように、第1の回転工具3の両端に設けた一対のストッパロッド10、10を両側の支持金具6、6の各貫通穴7、7に係止した状態にする。 In order to build the column P using the first rotary tool 3 described above, when the ground G is soft or the like, as shown in FIG. 8A, the square hole of the first rotary tool 3 is used. 16, the tip of the auger shaft S attached to the digging column car C (see FIG. 8A) is inserted (see FIG. 4), and the first rotation is performed as shown in FIG. The pair of stopper rods 10, 10 provided at both ends of the tool 3 are locked in the through holes 7, 7 of the support brackets 6, 6 on both sides.
次いで、図8(b)に示すように、穴掘建柱車Cに取り付けられたオーガ角シャフトSを上方に持ち上げ、オーガ角シャフトSを回転することによって地盤Gに立てた基礎鋼管1を地中に捩じ込む。そして、図8(c)に示すように地中に埋設した基礎鋼管1の両側の支持金具6、6の凹溝8、8に、図3(d)に示すように吊り金具5の両端上部の上端係止部5a、5aを係止し、基礎鋼管1の内部に吊り下げ状態で設置した吊り金具5の下端支持部5bの底板5cに柱体Pの下端部を係止する。
Next, as shown in FIG. 8 (b), the auger angle shaft S attached to the digging pillar car C is lifted upward, and the auger angle shaft S is rotated to turn the foundation steel pipe 1 standing on the ground G to the ground. Screw in. Then, as shown in FIG. 8 (c), in the recessed grooves 8 and 8 of the support fittings 6 and 6 on both sides of the foundation steel pipe 1 buried in the ground, the upper ends of both ends of the suspension fitting 5 as shown in FIG. 3 (d). The upper end locking portions 5a and 5a are locked, and the lower end portion of the column P is locked to the bottom plate 5c of the lower end support portion 5b of the hanging metal fitting 5 installed in a suspended state inside the basic steel pipe 1.
さらに、図8(e)に示すように、柱体Pと基礎鋼管1との隙間に発生土もしくは砂25を充填し、上部に砕石26を投入して流動性の高いモルタル等の固定剤27を流し込むことによって硬化させる。このように、吊り金具5で柱体Pを係止することで、柱体Pと基礎鋼管1との隙間に充填した発生土もしくは砂25の上部に砕石26と固定剤27による蓋を形成する程度の固定方法で基礎鋼管1と柱体Pとの堅固な固定が可能となる。 Further, as shown in FIG. 8 (e), the generated soil or sand 25 is filled in the gap between the column P and the basic steel pipe 1, and the crushed stone 26 is introduced into the upper portion to fix the fluid 27 with a high fluidity fixing agent 27 such as mortar. Cured by pouring. In this way, by locking the pillar body P with the hanging metal fitting 5, a lid made of the crushed stone 26 and the fixing agent 27 is formed on the generated soil or sand 25 filled in the gap between the pillar body P and the foundation steel pipe 1. The basic steel pipe 1 and the column P can be firmly fixed by a fixing method of a certain degree.
この実施例では、硬質地盤G等において、スクリュオーガS2による先行堀り、もしくはスクリュオーガS2による中堀り(基礎鋼管1内部の掘削)を必要とする地盤において、基礎鋼管1を埋設する際に使用する第2の回転工具4の構造及びこれらの施工方法について説明する。この第2の回転工具4は、図9及び図10に示すように、工具本体4aの中央上部に、図12(a)に示すように穴掘建柱車Cに取り付けられたスクリュオーガS2の先端を挿着する穴部23が設けられ、該穴部23の近傍の両側にスクリュオーガS2の螺旋翼S3の先端を係止する係止部材24が設けられている。 In this embodiment, in the hard ground G or the like, it is used when the foundation steel pipe 1 is buried in the ground that requires a prior excavation by the screw auger S2 or an intermediate excavation by the screw auger S2 (excavation inside the foundation steel pipe 1). The structure of the 2nd rotary tool 4 to perform and these construction methods are demonstrated. As shown in FIGS. 9 and 10, the second rotary tool 4 includes a screw auger S2 attached to the digging pillar car C as shown in FIG. A hole 23 for inserting the tip is provided, and locking members 24 for locking the tip of the spiral blade S3 of the screw auger S2 are provided on both sides in the vicinity of the hole 23.
また、図4に示すように、この第2の回転工具4の工具本体4aの両端には、基礎鋼管1の両側の支持金具6の各凹溝8に着脱自在に挿着される係止端部11が設けられた構成とされている(図6(a)〜(c)参照)。 Further, as shown in FIG. 4, locking ends that are detachably inserted into the respective concave grooves 8 of the support fitting 6 on both sides of the basic steel pipe 1 at both ends of the tool body 4 a of the second rotary tool 4. It is set as the structure by which the part 11 was provided (refer Fig.6 (a)-(c)).
このような第2の回転工具4について詳細に説明すると、図9又は図10(a)に示すように、工具本体4aの中央上部に、図12(a)に示すように、穴掘建柱車Cに取り付けられたスクリュオーガS2の先端を挿着する穴部23が設けられ、該穴部23の近傍の両側にスクリュオーガS2の螺旋翼S3の先端を係止する係止部材24、24が設けられている。なお、この係止部材24、24が、穴部23の近傍の両側に設けられることにより、スクリュオーガS2の正逆両回転に応じてスクリュオーガS2の螺旋翼S3の先端を掛止することが可能となる。 The second rotary tool 4 will be described in detail. As shown in FIG. 9 or FIG. 10 (a), a drilling pillar is provided at the upper center of the tool body 4a as shown in FIG. 12 (a). A hole 23 for inserting the tip of the screw auger S2 attached to the car C is provided, and locking members 24, 24 for locking the tip of the spiral blade S3 of the screw auger S2 on both sides in the vicinity of the hole 23. Is provided. In addition, by providing these locking members 24, 24 on both sides in the vicinity of the hole 23, the tip of the spiral blade S3 of the screw auger S2 can be hooked in accordance with both forward and reverse rotations of the screw auger S2. It becomes possible.
さらに、図9又は図10に示すように、工具本体4aの両端に基礎鋼管1の両側の支持金具6、6の凹溝8、8に着脱自在に挿着される係止端部11、11が設けられ、各係止端部11の上部にハンドル12によって回動する係止片13が設けられている。このような構成により、ハンドル12を回動することによって、図11(c)に示すように、係止片13を各支持金具6の凹溝8の内側部に設けた凹部14に係止させるストッパとして機能させることができる。 Further, as shown in FIG. 9 or FIG. 10, locking end portions 11, 11 that are detachably inserted into the recessed grooves 8, 8 of the support fittings 6, 6 on both sides of the basic steel pipe 1 at both ends of the tool body 4 a. , And a locking piece 13 that is rotated by the handle 12 is provided above each locking end 11. With such a configuration, by rotating the handle 12, the locking piece 13 is locked to the concave portion 14 provided in the inner portion of the concave groove 8 of each support fitting 6, as shown in FIG. It can function as a stopper.
なお、図9に示すように、工具本体4aの両端の係止端部11、11の上部に設けられたストッパ13a、13aは、各ハンドル12によって回動させた係止片13を各支持金具6の凹溝8の凹部14に係止させた状態において、その回動を規制するようにしたものである。 As shown in FIG. 9, the stoppers 13a and 13a provided on the upper ends of the locking ends 11 and 11 at both ends of the tool body 4a are provided with locking pieces 13 rotated by the handles 12, respectively. In the state of being engaged with the concave portion 14 of the six concave grooves 8, the rotation is restricted.
上記の第2の回転工具4を使用して電柱等の柱体Pを建柱するには、地盤Gが硬質等である場合、図12(a)に示すように、穴掘建柱車Cに取り付けられたスクリュオーガS2によって基礎鋼管1に見合った深さの先行掘りによる先行穴Hを掘削する。次いで、図11(a)〜(c)に示すように基礎鋼管1の上端の両端の支持金具6、6に第2の回転工具4を取り付ける。 In order to build a pole body P such as a utility pole using the second rotary tool 4 described above, when the ground G is hard or the like, as shown in FIG. The preceding hole H is excavated by the preceding excavation with a depth corresponding to the basic steel pipe 1 by the screw auger S2 attached to the pipe. Next, as shown in FIGS. 11 (a) to 11 (c), the second rotary tool 4 is attached to the support fittings 6, 6 at both ends of the upper end of the basic steel pipe 1.
次に、図12(b)に示すように、上記の基礎鋼管1の上端の支持金具6、6に取り付けた第2の回転工具4の穴部23に穴掘建柱車Cに取り付けたスクリュオーガS2の先端を挿着する。そして、スクリュオーガS2の螺旋翼S3の先端を係止部材24、24に係止すると共に、図11(a)〜(c)に示すように第2の回転工具4の両端に設けた係止端部11を両側の支持金具6の各凹溝8に挿着する。また、この状態で、係止端部11の上部に設けた係止片13をハンドル12の操作によって回動することにより、各支持金具6の凹溝8の内側部に設けた凹部14に係止した状態にする。 Next, as shown in FIG. 12 (b), the screw attached to the digging column car C in the hole 23 of the second rotary tool 4 attached to the support brackets 6, 6 at the upper end of the basic steel pipe 1. Insert the tip of the auger S2. Then, the tip of the spiral blade S3 of the screw auger S2 is locked to the locking members 24, 24, and the locking provided at both ends of the second rotary tool 4 as shown in FIGS. 11 (a) to 11 (c). The end portion 11 is inserted into each concave groove 8 of the support metal fitting 6 on both sides. Further, in this state, the locking piece 13 provided at the upper part of the locking end portion 11 is rotated by the operation of the handle 12, thereby engaging with the concave portion 14 provided in the inner portion of the concave groove 8 of each support fitting 6. Stop it.
次いで、図12(b)に示すように、スクリュオーガS2を回転することによって基礎鋼管1を先行穴Hに捩じ込む。なお、基礎鋼管1を捩じ込むときに先端爪2により拡径された先行穴Hの壁面を削孔した土砂gが先行穴底Hに堆積し、基礎鋼管1の先端を閉塞する状態となった場合、図12(c)に示すように、一旦回転工具4を取り外し、鋼管基礎1内にスクリュオーガS2を挿入して鋼管基礎1の内部の土砂gを掘削する作業(中堀り)が必要となるが、スクリュオーガS2の脱着作業が不要なため作業工程の変更が容易となる。さらに、図12(d)に示すように、地中に埋設した基礎鋼管1の両側の支持金具6、6の凹溝8、8に吊り金具5の両端上部の係止部23を係止し、図12(e)に示すように、基礎鋼管1の内部に吊り下げ状態で設置した吊り金具5の下端支持部5bの底板5cに柱体Pの下端部を係止する。 Next, as shown in FIG. 12B, the basic steel pipe 1 is screwed into the preceding hole H by rotating the screw auger S2. In addition, when the basic steel pipe 1 is screwed in, the earth and sand g obtained by drilling the wall surface of the preceding hole H whose diameter has been expanded by the tip claw 2 is deposited on the preceding hole bottom H, and the tip of the basic steel pipe 1 is closed. 12 (c), it is necessary to remove the rotary tool 4 once and insert the screw auger S2 into the steel pipe foundation 1 to excavate the earth and sand g inside the steel pipe foundation 1. However, since the work of attaching / detaching the screw auger S2 is not required, the work process can be easily changed. Further, as shown in FIG. 12 (d), the locking portions 23 at the upper ends of the suspension metal fitting 5 are engaged with the concave grooves 8 and 8 of the support metal fittings 6 and 6 on both sides of the foundation steel pipe 1 buried in the ground. As shown in FIG. 12 (e), the lower end portion of the column P is locked to the bottom plate 5 c of the lower end support portion 5 b of the suspension fitting 5 installed in a suspended state inside the basic steel pipe 1.
さらに、図12(f)に示すように、柱体Pと基礎鋼管1との隙間に発生土もしくは砂25を充填し、上部に砕石26を投入して流動性の高いモルタル等の固定剤27を流し込むことによって硬化させる。このように、吊り金具5で柱体Pを係止することで、柱体Pと基礎鋼管1の隙間に充填した発生土もしくは砂25の上部に砕石26と固定剤27による蓋を形成する程度の固定方法で基礎鋼管1と柱体Pとの堅固な固定が可能となる。 Furthermore, as shown in FIG. 12 (f), the generated soil or sand 25 is filled in the gap between the column P and the basic steel pipe 1, and the crushed stone 26 is introduced into the upper portion to fix the fluid 27 with a high fluidity fixing agent 27 such as mortar. Cured by pouring. Thus, by locking the column P with the hanging metal fitting 5, a lid is formed by the crushed stone 26 and the fixing agent 27 on the generated soil or sand 25 filled in the gap between the column P and the foundation steel pipe 1. With this fixing method, the basic steel pipe 1 and the column P can be firmly fixed.
本発明の基礎鋼管、基礎鋼管に使用する回転工具及びこれらの施工方法は、電柱等の柱体を地盤に建柱する際に使用する基礎鋼管を土中に埋設する際、地盤の状況に応じて、最適な施工方法に施工途中でも随時切り替えることができ、さらに基礎鋼管の埋設作業に支障とならない構造で柱体の鉛直荷重を基礎鋼管に伝達することで、柱体との接続固定に必要な材料強度と量を軽減することにより、迅速な建て替え工事を遂行することができる基礎鋼管、基礎鋼管に使用する回転工具及びこれらの施工方法として利用可能である。 The foundation steel pipe of the present invention, the rotary tool used for the foundation steel pipe, and the construction method thereof, depending on the situation of the ground, when the foundation steel pipe used when laying the pole body such as a utility pole on the ground is buried in the soil It is possible to switch to the optimal construction method at any time even during construction, and it is necessary for fixing the connection to the column body by transmitting the vertical load of the column to the foundation steel tube with a structure that does not hinder the foundation steel pipe burial work By reducing the material strength and quantity, it can be used as a foundation steel pipe, a rotary tool used for the foundation steel pipe, and a construction method thereof that can perform a quick rebuilding work.
1 基礎鋼管
1a 管体
2 先端爪
3 第1の回転工具
3a 工具本体
3b 保持体
3c 挿通穴
3d 弾性バネ
4 第2の回転工具
4a 工具本体
5 吊り金具
5a 上端係止部
5b 下端支持部
5c 底板
6 支持金具
6a 突出部
7 貫通穴
8 凹溝
9 フランジ
9a アングル部材
10 ストッパロッド
11 係止端部
12 ハンドル
13 係止片
13a ストッパ
14 凹部
15 環状部材
16 角形穴
16a 底部の角形穴
17 締結用取手
17a ストッパピン
18 内通部
19 弾発バネ
20 レバー
21 移動用溝
22 ストッパプレート
22a 段差
22b 穴部
22c バンド
23 穴部
24 係止部材
25 発生土もしくは砂
26 砕石
27 固定剤
C 穴掘建柱車
G 地盤
g 土砂
H 先行穴
P 柱体
S オーガ角シャフト
S1 係止穴
S2 スクリュオーガ
S3 螺旋翼
DESCRIPTION OF SYMBOLS 1 Basic steel pipe 1a Tube 2 Tip nail 3 1st rotary tool 3a Tool main body 3b Holding body 3c Insertion hole 3d Elastic spring 4 2nd rotary tool 4a Tool main body 5 Suspension metal fitting 5a Upper end locking part 5b Lower end support part 5c Bottom plate 6 Support metal fitting 6a Protruding part 7 Through hole 8 Groove 9 Flange 9a Angle member 10 Stopper rod 11 Locking end 12 Handle 13 Locking piece 13a Stopper 14 Recess 15 Ring member 16 Square hole 16a Square hole 17 at the bottom 17a Stopper pin 18 Inner passage portion 19 Bounce spring 20 Lever 21 Movement groove 22 Stopper plate 22a Step 22b Hole portion 22c Band 23 Hole portion 24 Locking member 25 Generated soil or sand 26 Crushed stone 27 Fixing agent C G ground g earth and sand H preceding hole P pillar S auger angle shaft S1 locking hole S2 screw auger S3 spiral wing
Claims (7)
第1の回転工具は、工具本体の中央上部に穴掘建柱車に取り付けられたオーガ角シャフトの先端を挿着する角形穴が設けられ、工具本体の両端に基礎鋼管の一対の支持金具の各貫通穴に挿脱自在に係止される一対のストッパロッドが設けられた構成を有し、
第2の回転工具は、工具本体の中央上部に穴掘建柱車に取り付けられたスクリュオーガの先端を挿着する穴部が設けられ、該穴部の両側近傍にスクリュオーガの螺旋翼の先端を係止する係止部材が設けられ、さらに工具本体の両端に基礎鋼管の一対の支持金具の各凹溝に着脱自在に挿着される係止端部が設けられた構成を有することを特徴とする基礎鋼管。 In a basic steel pipe in which a plurality of tip claws are provided at intervals in a peripheral portion at the lower end of a steel pipe that is rotationally press-fitted into the ground, the first rotary tool or a position facing the diameter direction of the peripheral portion at the upper end of the basic steel pipe A pair of support fittings to which the second rotary tool is attached is fixed in a state protruding upward from the upper end of the basic steel pipe, and a through hole and a recessed groove having an open top are formed in the protruding portion of each protruding support fitting. ,
The first rotary tool is provided with a square hole for inserting the tip of an auger square shaft attached to a drilling shaft at the center upper portion of the tool body, and a pair of support fittings of a basic steel pipe at both ends of the tool body. It has a configuration provided with a pair of stopper rods that are removably locked in each through hole,
The second rotary tool is provided with a hole portion for inserting a tip of a screw auger attached to a drilling column at the center upper portion of the tool body, and the tip of the spiral auger of the screw auger near both sides of the hole portion. And a locking end portion that is detachably inserted into each groove of the pair of support fittings of the basic steel pipe at both ends of the tool body. Basic steel pipe.
一対の支持金具の間に収まる工具本体の中央上部に穴掘建柱車のオーガ角シャフトの先端を挿着する角形穴と該角形穴に挿着したオーガ角シャフトの先端を係止するストッパピンとが設けられ、回転工具の両端に各支持金具の貫通穴に係止されるストッパロッドと該ストッパロッドを外方へ付勢する弾発バネとが設けられ、さらに工具本体の両部に各ストッパロッドを弾発バネの弾性に抗して引き込み操作するレバーと各ストッパロッドが外方へ突出した状態を係止するストッパプレートとが設けられていることを特徴とする基礎鋼管に使用する回転工具。 A pair of support metal fittings are fixed to each support metal fitting in a diametrically opposed position at the upper circumference of the basic steel pipe with a plurality of tip claws provided at intervals around the lower circumference of the steel pipe that is press-fitted into the ground. A rotary tool to be attached, which is used when the ground is soft, etc.
A square hole for inserting the tip of the auger angle shaft of the digging column car into the center upper part of the tool body that fits between the pair of support brackets, and a stopper pin for locking the tip of the auger angle shaft inserted in the square hole Are provided at both ends of the rotary tool with stopper rods that are locked in the through holes of the support brackets, and resilient springs that urge the stopper rods outward, and at each part of the tool body, there are stoppers. A rotary tool used for a basic steel pipe, characterized in that a lever for pulling the rod against the elasticity of the elastic spring and a stopper plate for locking each stopper rod projecting outward are provided. .
一対の支持金具の間に収まる工具本体の中央上部に穴掘建柱車に取り付けられたスクリュオーガの先端を挿着する穴部と該穴部の両側近傍にスクリュオーガの螺旋翼の先端を係止する係止部材が設けられ、工具本体の両端に支持金具の各凹溝に着脱自在に挿着される係止端部が設けられ、さらに各係止端部の上部にハンドルによって回動する係止片と、各係止片を基礎鋼管の一対の支持金具の各凹溝の内側部に設けられた凹部に係止させるようにしたことを特徴とする基礎鋼管に使用する回転工具。 A pair of support metal fittings are fixed to each support metal fitting in a diametrically opposed position at the upper circumference of the basic steel pipe with a plurality of tip claws provided at intervals around the lower circumference of the steel pipe that is press-fitted into the ground. A rotary tool to be attached, and the second rotary tool used when the ground is hard is:
Attach the tip of the screw auger attached to the drilling shaft to the center upper part of the tool body that fits between the pair of support fittings, and the tip of the screw auger blade near both sides of the hole. A locking member for stopping is provided, a locking end portion that is detachably inserted in each concave groove of the support metal fitting is provided at both ends of the tool main body, and further rotated by a handle above each locking end portion. A rotary tool used for a basic steel pipe, wherein the locking piece and each locking piece are locked in a recess provided in an inner portion of each concave groove of a pair of support fittings of the basic steel pipe.
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