JP2016217022A - Pile installation method - Google Patents

Pile installation method Download PDF

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JP2016217022A
JP2016217022A JP2015103869A JP2015103869A JP2016217022A JP 2016217022 A JP2016217022 A JP 2016217022A JP 2015103869 A JP2015103869 A JP 2015103869A JP 2015103869 A JP2015103869 A JP 2015103869A JP 2016217022 A JP2016217022 A JP 2016217022A
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pile
hole
mortar
depth
installation method
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JP6512633B2 (en
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光明 新井
Mitsuaki Arai
光明 新井
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Abstract

PROBLEM TO BE SOLVED: To provide a pile installation method capable of strongly installing a pile by a simple process.SOLUTION: A pile installation method comprises following processes: to prepare a pile with a tapered tip and install the pile into a predetermined depth L1 from a ground surface; to pull the installed pile out of the ground surface to form a hole; to introduce powder mortar or cement into the hole; to install the pile again to a depth L2 equal to or deeper than the predetermined depth L1 in the hole into which the powder mortar or cement has been introduced; and to sprinkle water around the pile from the ground surface.SELECTED DRAWING: Figure 1

Description

本発明は、地中に埋設して建築用部材を支持するため等に用いられる杭を設置する杭の設置方法に関する。   TECHNICAL FIELD The present invention relates to a pile installation method for installing a pile that is buried in the ground and used for supporting a building member.

建設作業現場において、地中に埋設して建築用部材を支持するため等に用いられる杭は、手すり、柵などの仮設の構造物やソーラーパネルなどの設置、車止めの支柱などに用いられ、必要不可欠な建築資材である。従来、土中に杭を打ち込み設置するときに、杭より大径の穴を形成し、セメントを流し込んでから杭を挿入したり、ぐらつきなどがないように強固に設置するために先端部にコンクリート施工による土台を形成したりすることが行われてきた。また、単管からなる杭を土中に打ち込んだ後に、杭内部から掘削具を挿入し、杭先端にソイルセメント化した根固め部を形成することが行われている。(例えば、特許文献1参照)   Pile used in construction work sites to embed in the ground to support building members is used for temporary structures such as handrails, fences, solar panels, and car support posts. It is an indispensable building material. Conventionally, when a pile is driven into the soil and installed, a hole with a diameter larger than that of the pile is formed, and the pile is inserted after the cement is poured in. Forming the foundation by construction has been performed. Moreover, after driving a pile made of a single pipe into the soil, an excavating tool is inserted from the inside of the pile to form a soil cemented rooting portion at the tip of the pile. (For example, see Patent Document 1)

特開平2006−348564号公報JP 2006-348564 A

しかし、上述の工法は、工程が複雑であったり、コンクリートが固化するまで待つ必要があったりするので、工事時間、コストが増大するという問題があった。   However, the above-described construction method has a problem in that the process is complicated, and it is necessary to wait until the concrete is solidified, resulting in an increase in construction time and cost.

そこで、本発明では、簡単な工程で強固に杭を設置することができる杭の設置方法を提供することを目的とする。   Then, it aims at providing the installation method of a pile which can install a pile firmly with a simple process in this invention.

上記目的を達成するために、請求項1に記載の発明では、杭の設置方法であって、先端が先細りの杭を用意し、杭を地表から所定の深さL1まで打ち込む工程と、打ち込んだ杭を地面から抜いて穴部を形成する工程と、前記穴部に粉体状のモルタルまたはセメントを導入する工程と、粉体状のモルタルまたはセメントが導入された前記穴部に、前記所定の深さL1以上の深さL2まで再度杭を打ち込む工程と、地表から杭の周りに散水する工程と、を備えた、という技術的手段を用いる。 In order to achieve the above object, the invention according to claim 1 is a pile installation method, wherein a pile with a tapered tip is prepared, and the pile is driven to a predetermined depth L1 from the ground surface. Removing the pile from the ground to form a hole; introducing the powdered mortar or cement into the hole; and introducing the powder into the hole into which the powdered mortar or cement has been introduced. A technical means is used that includes a step of driving the pile again to a depth L2 equal to or greater than the depth L1 and a step of watering the pile from the ground surface around the pile.

請求項1に記載の発明によれば、粉体状のモルタルまたはセメントが導入された穴部に、再度杭を打ち込むことにより、穴部を囲むように土石とモルタルとが混合された混合部が形成される。そして、地表から杭の周りに散水することにより、土石とモルタルとが混合された混合部に水が添加されることになり、コンクリート様の塊部が形成される。塊部が杭と強固に結合されることにより、簡単な工程で杭を強固に設置することができる。これにより、短時間、低コストで杭を設置することができる。   According to the first aspect of the present invention, the mixed portion in which the debris and the mortar are mixed so as to surround the hole portion by driving the pile again into the hole portion into which the powdery mortar or cement is introduced. It is formed. And by sprinkling water around the pile from the ground surface, water will be added to the mixing part in which the debris and mortar were mixed, and a concrete-like lump part will be formed. When the lump is firmly coupled to the pile, the pile can be firmly installed in a simple process. Thereby, a pile can be installed at low cost for a short time.

杭の設置方法の工程を示す説明図である。It is explanatory drawing which shows the process of the installation method of a pile. 杭の設置方法の工程を示す説明図である。It is explanatory drawing which shows the process of the installation method of a pile. 杭の設置方法の変更例を示す説明図である。It is explanatory drawing which shows the example of a change of the installation method of a pile. 引き抜いた杭に塊部が付着した状態を示す説明図である。It is explanatory drawing which shows the state which the lump part adhered to the pulled-out pile.

本発明に係る杭の設置方法について図を参照して説明する。まず、先端が先細りで閉塞した杭1を用意し、図1(A)に示すように、杭1を地表Gから所定の深さL1まで打ち込む。 The pile installation method according to the present invention will be described with reference to the drawings. First, a pile 1 whose tip is tapered and closed is prepared, and the pile 1 is driven from the ground surface G to a predetermined depth L1 as shown in FIG.

次に、図1(B)に示すように、打ち込んだ杭1を地面から抜いて穴部10を形成する。   Next, as shown in FIG. 1 (B), the pile 1 that has been driven out is removed from the ground to form a hole 10.

続いて、図1(C)に示すように、穴部10に粉体状のモルタルMを導入する。ここで、モルタルMには水が添加されておらず、ドライの状態である。   Subsequently, as shown in FIG. 1 (C), powdery mortar M is introduced into the hole 10. Here, water is not added to the mortar M, and it is in a dry state.

続いて、図1(D)に示すように、粉体状のモルタルMが導入された穴部10に、所定の深さL1以上の深さL2まで再度杭を打ち込む。穴部10に杭1を打ち込むことによりモルタルMが杭1の先端部により横方向に押しやられる。このとき、モルタルMは細粒であるので、土石の間に入り込み、穴部10を囲むように土石とモルタルとが混合された混合部20が形成される。ここで、モルタルMはドライで流動性に乏しいことが重要である。モルタルに水分を添加し練った状態では、流動性が増大し、杭1を打ち込んでもモルタルMが土石中に入り込まず、杭1と土との間から外に溢れ出てしまう。このように、「ドライな状態」とは、モルタルMの流動性が乏しく、混合部20を形成可能な状態を示す。図1(C)に示す工程で、穴部10に導入するモルタルの量は、本工程で形成する混合部20の目標寸法により設定する。ここで、混合部20は、穴部10の深さやモルタルMの量を変えることにより深さ方向の任意の位置に形成することができる。   Subsequently, as shown in FIG. 1D, the pile is driven again into the hole 10 into which the powdered mortar M has been introduced to a depth L2 that is equal to or greater than a predetermined depth L1. By driving the pile 1 into the hole 10, the mortar M is pushed laterally by the tip of the pile 1. At this time, since the mortar M is fine-grained, a mixed portion 20 is formed in which the stone and mortar are mixed so as to enter between the stones and surround the hole 10. Here, it is important that the mortar M is dry and poor in fluidity. In a state where water is added to the mortar and kneaded, the fluidity increases, and even if the pile 1 is driven, the mortar M does not enter the debris and overflows from between the pile 1 and the soil. Thus, the “dry state” indicates a state in which the fluidity of the mortar M is poor and the mixing part 20 can be formed. In the step shown in FIG. 1C, the amount of mortar introduced into the hole 10 is set according to the target dimension of the mixing portion 20 formed in this step. Here, the mixing unit 20 can be formed at an arbitrary position in the depth direction by changing the depth of the hole 10 or the amount of the mortar M.

続いて、図2(E)に示すように、地表から杭の周りに水Wを散水する。これにより、土中に水が浸透していき、土石とモルタルとが混合された混合部20に水が添加されることになり、図2(F)に示すように、コンクリート様の塊部30が形成される。杭1の表面には、主にモルタルが接触するため、塊部30は杭1と強固に結合される。ここで、散水は、例えば、杭1の径の2倍程度の領域に、モルタルの単独で使用するときに必要な水の量より過剰であって、十分な寸法の塊部30を形成可能な量を撒くことで行う。この塊部30が土中に存在することにより、杭1は強固に設置されることになる。特に、杭1の引き抜きについては、大きな塊部30が抵抗となるため、大きな力が必要となる。   Then, as shown in FIG.2 (E), the water W is sprinkled around the pile from the ground surface. As a result, water penetrates into the soil, and water is added to the mixing unit 20 in which the debris and mortar are mixed. As shown in FIG. Is formed. Since the mortar mainly contacts the surface of the pile 1, the lump 30 is firmly coupled to the pile 1. Here, sprinkling is, for example, in an area about twice as large as the diameter of the pile 1, which is more than the amount of water required when using the mortar alone, and can form a sufficiently large lump 30. Do it by raising the amount. When this lump 30 exists in the soil, the pile 1 is firmly installed. In particular, for pulling out the pile 1, a large mass 30 is a resistance, so a large force is required.

(実施形態の効果)
本発明の杭の設置方法によれば、簡単な工程で強固に杭を設置することができる。これにより、短時間、低コストで杭を設置することができる。
(Effect of embodiment)
According to the pile installation method of the present invention, the pile can be firmly installed in a simple process. Thereby, a pile can be installed at low cost for a short time.

(変更例)
本実施形態では、モルタルを用いたが、砂を含まない生セメントを使用することもできる。
(Example of change)
In this embodiment, although mortar was used, the raw cement which does not contain sand can also be used.

図1(B)−(D)の工程は、複数回繰り返すことができる。例えば、深さLaの穴部10に対して、モルタルMの導入と杭1の打ち込みを繰り返すことにより、混合部20の寸法を水平方向に大きくすることができるので、図3(A)に示すように、塊部30の寸法を大きくすることができる。また、深さLbの穴部10にモルタルMを導入し、杭1を深さLbよりも深い深さLcまで打ち込み、一旦杭1を抜いて形成された深さLcの穴部10に再度モルタルMを導入し、杭1を深さLcよりも深い深さまで打ち込む、ということを繰り返すこともできる。これによれば、深さ方向の異なる位置に混合部20を形成することができるので、例えば、図3(B)に示すように、塊部30を複数箇所形成したり、塊部30の寸法を深さ方向に大きくしたりすることができる。これらにより、塊部30の体積を増大させることができるので、杭1をより強固に設置することができる。   The steps in FIGS. 1B to 1D can be repeated a plurality of times. For example, by repeatedly introducing the mortar M and driving the pile 1 into the hole portion 10 having the depth La, the dimension of the mixing portion 20 can be increased in the horizontal direction, and therefore, as shown in FIG. Thus, the dimension of the lump part 30 can be enlarged. Further, the mortar M is introduced into the hole 10 having the depth Lb, the pile 1 is driven to the depth Lc deeper than the depth Lb, and the mortar is once again inserted into the hole 10 having the depth Lc formed by pulling the pile 1 once. It can be repeated that M is introduced and the pile 1 is driven to a depth deeper than the depth Lc. According to this, since the mixing unit 20 can be formed at different positions in the depth direction, for example, as shown in FIG. Can be increased in the depth direction. By these, since the volume of the lump part 30 can be increased, the pile 1 can be installed more firmly.

直径48.6mm、長さ1000mmの杭を用意し、まず、土中に深さ350mmだけ打ち込んで穴部を形成し、その中にモルタルを1kg導入した。1kgのモルタルは穴部をほぼ充填する量である。そして、杭を再度350mm打ち込んだ後で抜き取り、穴部に更にモルタルを1kg導入した。これにより、深さ350mmの穴部にモルタルを2kg導入したことになる。続いて、杭を深さ約900mmまで打ち込んだ後に、杭の周りに散水した。散水は、杭の径の2倍程度の領域に、約7Lの水を撒いて行った。ここで、使用したモルタルの単独で使用するときに必要な水の量は、300−400cc程度である。   A pile having a diameter of 48.6 mm and a length of 1000 mm was prepared. First, a hole was formed by being driven into the soil by a depth of 350 mm, and 1 kg of mortar was introduced therein. 1 kg of mortar is an amount that almost fills the hole. Then, the pile was driven again after 350 mm and extracted, and 1 kg of mortar was further introduced into the hole. As a result, 2 kg of mortar was introduced into the hole having a depth of 350 mm. Subsequently, the pile was driven to a depth of about 900 mm and then sprinkled around the pile. Watering was carried out by spraying about 7 L of water in an area about twice the diameter of the pile. Here, the amount of water required when the mortar used alone is about 300 to 400 cc.

このように設置した杭の引き抜き試験を行った。同じ杭を通常の条件で打ち込んだときの引き抜き強度が200−400kgfであるのに対し、本発明の設置方法により杭の引き抜き強度は、測定装置の測定範囲を超えた1500kgf以上であった。   A pull-out test of the piles thus installed was performed. The pull-out strength when driving the same pile under normal conditions is 200-400 kgf, whereas the pull-out strength of the pile by the installation method of the present invention was 1500 kgf or more exceeding the measurement range of the measuring device.

引き抜いた杭に塊部を付着した状態を図3に示す。塊部は、地表直下に形成されており、深さ方向に約500mm、最大径が約300mm、重さ約17kgと巨大な塊として形成されていた。 FIG. 3 shows a state in which a lump is attached to the pulled-out pile. The lump portion was formed directly below the ground surface, and was formed as a large lump with a depth of about 500 mm, a maximum diameter of about 300 mm, and a weight of about 17 kg.

以上より、本発明の杭の設置方法によれば、簡単な工程で強固な設置が可能であることが確認された。 From the above, according to the pile installation method of the present invention, it was confirmed that a strong installation was possible with a simple process.

1…杭
10…穴部
20…混合部
30…塊部
M…モルタル
W…水





DESCRIPTION OF SYMBOLS 1 ... Pile 10 ... Hole part 20 ... Mixing part 30 ... Mass part M ... Mortar W ... Water





Claims (1)

先端が先細りの杭を用意し、
杭を地表から所定の深さL1まで打ち込む工程と、
打ち込んだ杭を地面から抜いて穴部を形成する工程と、
前記穴部に粉体状のモルタルまたはセメントを導入する工程と、
粉体状のモルタルまたはセメントが導入された前記穴部に、前記所定の深さL1以上の深さL2まで再度杭を打ち込む工程と、
地表から杭の周りに散水する工程と、を備えた杭の設置方法。
Prepare a pile with a tapered tip,
Driving the pile from the ground surface to a predetermined depth L1,
Removing the driven pile from the ground to form a hole,
Introducing powdered mortar or cement into the hole;
A step of driving a pile again into the hole into which the powdery mortar or cement has been introduced, to a depth L2 equal to or greater than the predetermined depth L1,
A method of installing a pile comprising: a step of sprinkling water around the pile from the surface.
JP2015103869A 2015-05-21 2015-05-21 Pile installation method Active JP6512633B2 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52126003A (en) * 1976-04-14 1977-10-22 Hitachi Shipbuilding Eng Co Pile and method of driving pile
JPS6023522A (en) * 1983-07-18 1985-02-06 Asahi Chem Ind Co Ltd Construction work of concrete pile
JP2007070968A (en) * 2005-09-09 2007-03-22 Geotop Corp Wooden pile and its burying method
JP2008038424A (en) * 2006-08-04 2008-02-21 Asahi Kasei Construction Materials Co Ltd Spiral rod and method of constructing structure using the same
JP2008156837A (en) * 2006-12-21 2008-07-10 Asahi Kasei Construction Materials Co Ltd Excavation rod
JP2008261173A (en) * 2007-04-13 2008-10-30 Asahi Kasei Construction Materials Co Ltd Construction method of hollow columnar body

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52126003A (en) * 1976-04-14 1977-10-22 Hitachi Shipbuilding Eng Co Pile and method of driving pile
JPS6023522A (en) * 1983-07-18 1985-02-06 Asahi Chem Ind Co Ltd Construction work of concrete pile
JP2007070968A (en) * 2005-09-09 2007-03-22 Geotop Corp Wooden pile and its burying method
JP2008038424A (en) * 2006-08-04 2008-02-21 Asahi Kasei Construction Materials Co Ltd Spiral rod and method of constructing structure using the same
JP2008156837A (en) * 2006-12-21 2008-07-10 Asahi Kasei Construction Materials Co Ltd Excavation rod
JP2008261173A (en) * 2007-04-13 2008-10-30 Asahi Kasei Construction Materials Co Ltd Construction method of hollow columnar body

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