JP3134898U

JP3134898U - Concrete pile

Info

Publication number: JP3134898U
Application number: JP2007004921U
Authority: JP
Inventors: 良三太田
Original assignee: 良三太田
Priority date: 2007-05-30
Filing date: 2007-05-30
Publication date: 2007-08-30
Anticipated expiration: 2017-05-30

Abstract

【課題】長いコンクリート杭の中間場所における地耐力を増加し、又杭軸の水平方向の負荷に対しても耐えうるために支持力を大きく向上させる。
【解決手段】長いコンクリート杭の中間場所における地耐力を増加し又水平方向のずれを防止するため杭本体より水平方向に数本の角鋼管材を腕のように土中に突出させることにより支持力の向上と安定をはかるものである。
【選択図】図２An object of the present invention is to increase the bearing strength in the middle place of a long concrete pile and to greatly withstand the load in the horizontal direction of the pile shaft, thereby greatly improving the bearing capacity.
In order to increase the earth bearing strength in the middle place of a long concrete pile and to prevent horizontal displacement, several square steel pipe members are protruded into the soil like an arm in the horizontal direction from the pile body. It aims to improve and stabilize.
[Selection] Figure 2

Description

掘削された孔にコンクリートを打設する場所打ちコンクリート杭の分野 Field of cast-in-place concrete piles in which concrete is placed in excavated holes

場所打ちコンクリート杭を築造する場合、地耐力の大きい硬い地盤まで掘り下げ、支持力を保持しようとするが埋め立て地等の軟弱地盤では地中における杭の安定は期待し難い。 When constructing cast-in-place concrete piles, it is difficult to expect the stability of piles in the ground on soft ground such as landfills, etc., in order to maintain the bearing capacity by digging down to hard ground with a high earth bearing capacity.

長いコンクリート杭の中間場所における地耐力を増加し、又杭軸の水平方向の負荷に対しても耐えうるために杭本体より水平方向に数本の角鋼管材を腕のように土中に突出させることにより支持力を大きく向上させようとするものである。 In order to increase the earth bearing strength in the middle place of a long concrete pile and to withstand the horizontal load of the pile shaft, several square steel pipes are protruded into the soil like an arm in the horizontal direction from the pile body. Therefore, the support force is greatly improved.

杭の場所打ちのための掘削孔１内に、その内壁と所定の間隔を保ちながら鉄筋篭２を溶接により継ぎながら次々と垂下していく、その途中で内周数カ所に傾斜案内路５とそれに続く外周への貫通角窓６を設け、この傾斜案内路５の入口に多数の切溝８を入れて屈曲可能にした数本の角鋼管材７を僅かに差し込んで保持させた関節円筒４の下端を鉄筋篭２に溶接し、次ぎにその関節円筒４の上端に次の鉄筋篭２又は鋼管３を溶接した後、これを垂下して掘削孔１の底部に達しさせ、その時地上に残された鋼管３等を仮止めして、長い打撃棒１０又は押圧機１１により関節円筒４内の角鋼管材７の頭部を打撃又は押圧して、これを傾斜案内路５に沿うて屈曲させながら貫通角窓６よりほぼ水平に掘削孔１内壁に押し込み、丁度角鋼管材７が土中に腕を突出した状態とし、次ぎに掘削孔１にコンクリートを打設することにより小径鉄筋９で補強された角鋼管材７の内部及び外部周辺までコンクリートを充満させ、コンクリートの硬化により強靱な腕を形成できるようにする。 In the excavation hole 1 for placing a pile, the steel bar 2 is suspended one after another while being welded while maintaining a predetermined distance from the inner wall. The lower end of the joint cylinder 4 is provided with a through-corner window 6 to the outer periphery, and a few square steel pipe members 7 which are bent by inserting a number of kerfs 8 at the entrance of the inclined guide path 5 are inserted and held slightly. Was welded to the rebar rod 2 and then the next rebar rod 2 or steel pipe 3 was welded to the upper end of the joint cylinder 4 and then dropped to reach the bottom of the excavation hole 1, at that time left on the ground The steel pipe 3 and the like are temporarily fixed, the head of the square steel pipe member 7 in the joint cylinder 4 is hit or pressed by the long hitting rod 10 or the pressing machine 11, and the penetration angle is bent while bending it along the inclined guide path 5. Push into the inner wall of the borehole 1 almost horizontally from the window 6 and the square steel pipe 7 is just in the soil. Next, the concrete is filled to the inside and outside of the square steel pipe 7 reinforced with the small-diameter rebar 9 by placing concrete in the excavation hole 1, and a strong arm can be formed by hardening the concrete. Like that.

長い杭の中間場所に数カ所関節円筒４を介在させ、その各々から水平に数本の角鋼管材７を土中に腕のように突出させることにより、腕の下面にも支持力が発生するため地耐力を大幅に引き上げることが可能になり、又横方向の外力にも耐え、地震等により杭の横ずれ、又緩みを防止できる。 By interposing several joint cylinders 4 in the middle of the long pile and horizontally projecting several square steel pipes 7 from each of them into the soil like an arm, a supporting force is also generated on the lower surface of the arm. It is possible to greatly increase the proof stress, withstand lateral external forces, and prevent lateral displacement and loosening of piles due to earthquakes and the like.

特に大きな基礎を支持するため、密接して多数本の杭を築造する場合、角鋼管材７が隣接する杭の角鋼管材７の近辺に達し、その附近に流出したコンクリートが絡み合うことにより多数本の杭を束ねた構造になることが可能となり、大きな剛性を保持することが期待できる。 When a large number of piles are constructed closely to support a particularly large foundation, the square steel pipe material 7 reaches the vicinity of the square steel pipe material 7 of the adjacent pile, and the concrete that has flowed out in the vicinity of the piles is intertwined. It is possible to obtain a structure in which a large number of bundles are bundled, and a large rigidity can be expected.

地中深く、硬い地盤まで掘削孔１を穿ち、その内壁に地がためを施した後、その内壁と所定の間隔を保ちながら鉄筋篭２を溶接により継ぎながら図１のように次々と何本も垂下していく。そして次ぎにその鉄筋篭２の上端に関節円筒４を載せ、その下端を鉄筋篭２の縦筋に溶接し、この関節円筒４の内周の数カ所の傾斜案内路５の入口に数本の角鋼管材７を差し込んで保持させ、その上に押圧機１１を取付ける。次ぎに関節円筒４の上端に次の鉄筋篭２を溶接して垂下し、何本かの鉄筋篭２を溶接した後、又２個目の関節円筒４を溶接し、その内部に数本の角鋼管材７を保持させ、更にその上に鋼管３を突き合わせ溶接する。 After drilling the drilling hole 1 deeply into the ground and stiffening the inner wall, the inner wall is grounded, and then the steel bar 2 is welded while maintaining a predetermined distance from the inner wall. Also droops. Next, the joint cylinder 4 is placed on the upper end of the reinforcing bar 2 and its lower end is welded to the vertical bar of the reinforcing bar 2, and several square steel bars are installed at the inlets of several inclined guide paths 5 on the inner periphery of the joint cylinder 4. The tube material 7 is inserted and held, and the pressing machine 11 is mounted thereon. Next, the following rebar rod 2 is welded to the upper end of the joint cylinder 4 and drooped. After several of the rebar rods 2 are welded, the second joint cylinder 4 is also welded, and several of them are inside. The square steel pipe material 7 is held, and the steel pipe 3 is butt welded thereon.

そしてこの長く連結された鉄筋篭２と関節円筒４とを掘削孔１の底面まで下ろした後、地上に残されている鋼管３を沈下しないように仮止めし、下方の関節円筒４に取付けた押圧機１１により、角鋼管材７の頭を押圧して、角鋼管材７を傾斜案内路５により屈曲させながら貫通角窓６より突き出し、掘削孔１の内壁に水平に深く突き出させる。 Then, after lowering the rebar rod 2 and the joint cylinder 4 which are long connected to the bottom surface of the excavation hole 1, the steel pipe 3 remaining on the ground is temporarily fixed so as not to sink, and attached to the lower joint cylinder 4. The head of the square steel pipe material 7 is pressed by the pressing machine 11, and the square steel pipe material 7 is protruded from the through-angle window 6 while being bent by the inclined guide path 5, and is protruded horizontally and deeply into the inner wall of the excavation hole 1.

次ぎに長い打撃棒１０を上方の関節円筒４内の角鋼管材７の上に載せ、エアーハンマー等で打撃して、すべての角鋼管材７を突き出させることにより図２のように８本の腕が土中に太い根を張る状態となる。この作業がすむと打撃棒１０又は押圧機１１は地上に取り出される。 Next, the long striking rod 10 is placed on the square steel pipe member 7 in the upper joint cylinder 4 and is struck with an air hammer or the like to project all the square steel pipe members 7 so that eight arms are formed as shown in FIG. It becomes a state where a thick root is put in the ground. When this operation is completed, the batting rod 10 or the pressing machine 11 is taken out to the ground.

角鋼管材７の形状は図３のように片側面に多数の切溝８を設け、その隙間は図５のように屈曲した場合にはその隙間が合わさるような寸法としている。そして、その先端部はあらかじめ少し屈曲して傾斜案内路５の入口に少し押し込めるようにして保持されるようにしている。そして先端面は土中に突き出る時はあまり土が侵入しない程度の隙間を設けている。角鋼管材７は切溝８を設けているため、屈曲に要する力はあまり過大にならない。そしてその内部に多数の小径鉄筋９の上先端部だけ角鋼管材７に軽く溶接してぶら下げており、角鋼管材７の屈曲に従って湾曲する。 The shape of the square steel pipe material 7 is such that a large number of kerfs 8 are provided on one side as shown in FIG. 3, and the gaps are dimensioned so that the gaps fit together when bent as shown in FIG. And the front-end | tip part is bent a little in advance, and it is made to hold | maintain so that it may push into the entrance of the inclination guide path 5 a little. The front end surface is provided with a gap so that the soil does not enter much when protruding into the soil. Since the square steel pipe material 7 is provided with the kerfs 8, the force required for bending does not become excessively large. Then, only the upper tips of a number of small-diameter rebars 9 are lightly welded and hung on the square steel pipe member 7 and are bent as the square steel pipe member 7 is bent.

すべての角鋼管材７が土中に突き出された後、掘削孔１にコンクリートを打設するとコンクリートは角鋼管材７の内部まで充満し、その先端及び貫通角窓６の隙間より、土中まで浸透し、角鋼管材７の外周もコンクリート液で保護される。 After all the square steel pipe material 7 is pushed out into the soil, when concrete is placed in the excavation hole 1, the concrete fills the inside of the square steel pipe material 7 and penetrates into the soil through the gap between the tip and the through-angle window 6. The outer periphery of the square steel pipe material 7 is also protected by the concrete liquid.

コンクリートが硬化すると角鋼管材７は多数の小径鉄筋９により鉄筋入り角鋼管の高い剛性を持つことになる。 When the concrete is hardened, the square steel pipe material 7 has a high rigidity of the square steel pipe with reinforcing bars due to the large number of small diameter reinforcing bars 9.

本案の角鋼管材７による杭の腕の突出の構造は傾斜地及び埋立地の土留用杭にも利用することが出来る。 The projecting structure of the pile arm by the square steel pipe material 7 of the present plan can also be used for earth retaining piles in sloped land and landfill.

本案に係わる実施例を示すものであって鉄筋篭２、鋼管３の間に関節円筒４が組み込まれ、掘削孔１内に垂下された状態を示す縦断面図The longitudinal cross-sectional view which shows the Example concerning this plan, and shows the state by which the joint cylinder 4 was integrated between the reinforcing bar 2 and the steel pipe 3, and was drooping in the excavation hole 1 図１における関節円筒４内の角鋼管材７が掘削孔１の内壁に水平に突出た状態を示す縦断面図1 is a longitudinal sectional view showing a state in which a square steel pipe material 7 in the joint cylinder 4 in FIG. 1 protrudes horizontally on the inner wall of the excavation hole 1. 図１の一部拡大の縦断面図1 is a partially enlarged longitudinal sectional view of FIG. 図３のＸ−Ｘ断面図XX sectional view of FIG. 図２の一部拡大の縦断面図2 is a partially enlarged longitudinal sectional view of FIG. 図５のＹ−Ｙ断面図YY sectional view of FIG.

Explanation of symbols

１・・・掘削孔２・・・鉄筋篭
３・・・鋼管４・・・関節円筒
５・・・傾斜案内路６・・・貫通角窓
７・・・角鋼管材８・・・角鋼管材の切溝
９・・・小径鉄筋１０・・・打撃棒
１１・・・押圧機１２・・・鋼管仮止め用材DESCRIPTION OF SYMBOLS 1 ... Drilling hole 2 ... Reinforcing rod 3 ... Steel pipe 4 ... Joint cylinder 5 ... Inclined guideway 6 ... Through angle window 7 ... Square steel pipe material 8 ... Square steel pipe material Cut groove 9 ... Small-diameter rebar 10 ... Blow rod 11 ... Pressing machine 12 ... Steel tube temporary fixing material

Claims

In the excavation hole 1 for placing a pile, the steel bar 2 is suspended one after another while being welded while maintaining a predetermined distance from the inner wall. The lower end of the joint cylinder 4 is provided with a through-corner window 6 to the outer periphery, and a few square steel pipe members 7 which are bent by inserting a number of kerfs 8 at the entrance of the inclined guide path 5 are inserted and held slightly. Was welded to the rebar rod 2 and then the next rebar rod 2 or steel pipe 3 was welded to the upper end of the joint cylinder 4 and then dropped to reach the bottom of the excavation hole 1, at that time left on the ground The steel pipe 3 and the like are temporarily fixed, the head of the square steel pipe member 7 in the joint cylinder 4 is hit or pressed by the long hitting rod 10 or the pressing machine 11, and the penetration angle is bent while bending it along the inclined guide path 5. Push into the inner wall of the borehole 1 almost horizontally from the window 6 and the square steel pipe 7 is just in the soil. Next, the concrete is filled to the inside and outside of the square steel pipe 7 reinforced with the small-diameter rebar 9 by placing concrete in the excavation hole 1, and a strong arm can be formed by hardening the concrete. A cast-in-place concrete pile.