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JP6512633B2 - Pile installation method - Google Patents
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JP6512633B2 - Pile installation method - Google Patents

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JP6512633B2
JP6512633B2 JP2015103869A JP2015103869A JP6512633B2 JP 6512633 B2 JP6512633 B2 JP 6512633B2 JP 2015103869 A JP2015103869 A JP 2015103869A JP 2015103869 A JP2015103869 A JP 2015103869A JP 6512633 B2 JP6512633 B2 JP 6512633B2
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installation method
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光明 新井
光明 新井
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有限会社新光工業
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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。   The present invention relates to a pile installation method for installing a pile which is buried in the ground and used for supporting a building member or the like.

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)   In the construction site, a pile used for embedding in the ground and supporting building members, etc. is used for temporary structures such as handrails and fences, installation of solar panels etc., and pillars for car stops etc. It is an essential building material. Conventionally, when driving and installing a pile in the ground, a hole with a larger diameter than the pile is formed, cement is poured in, and then the pile is inserted or concrete is installed at the tip to firmly install so as not to wobble. It has been done to form a foundation by construction. In addition, after a single pipe pile is driven into the soil, a drilling tool is inserted from the inside of the pile to form a soil cemented root consolidation portion at the tip of the pile. (For example, refer to patent document 1)

特開平2006−348564号公報JP-A-2006-348564

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-mentioned construction method has a problem that the construction time and cost increase because the process is complicated and it is necessary to wait until the concrete solidifies.

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。   So, in this invention, it aims at providing the installation method of the pile which can install a pile firmly by a simple process.

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以上の地表から深さ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 method of installing a pile, wherein a pile having a tapered tip is prepared, and the pile is driven from the ground surface to a predetermined depth L1; The step of removing a pile from the ground to form a hole, the step of introducing powdery mortar or cement into the hole, and the predetermined hole in the hole into which powdery mortar or cement is introduced A technical means is used which comprises the steps of driving the pile again to the depth L2 from the ground surface of depth L1 or more, and sprinkling water 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 invention as set forth in claim 1, the piled part is again driven into the hole into which the powdery mortar or cement is introduced, so that the mixing part in which the soil and mortar are mixed so as to surround the hole is obtained. It is formed. And water is added to the mixing part where earth stone and mortar were mixed by watering around the pile from the ground, and a concrete-like lump part is formed. The pile portion can be firmly installed in a simple process because the block portion is firmly connected to the pile. Thereby, a pile can be installed for a short time and at low cost.

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 in 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 installation method of the pile concerning the present invention is explained with reference to figures. 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. 1 (A).

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 to FIG. 1 (B), the pile 1 pierced is pulled out from the ground, and the hole 10 is formed.

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. 1C, a mortar M in powder form 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, piles are again driven into the hole 10 into which the powdery mortar M has been introduced, to a depth L2 of a predetermined depth L1 or more. 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, it enters between the earth and sand, and a mixing portion 20 in which earth and sand and mortar are mixed is formed so as to surround the hole 10. Here, it is important that the mortar M is dry and poor in fluidity. When water is added to the mortar and kneaded, the fluidity is increased, and even if the pile 1 is driven, the mortar M does not enter the earth and sand and overflows from between the pile 1 and the soil. As described above, the “dry state” indicates a state in which the fluidity of the mortar M is poor and the mixing portion 20 can be formed. The amount of mortar introduced into the hole 10 in the step shown in FIG. 1C is set according to the target dimension of the mixing unit 20 formed in this step. Here, the mixing section 20 can be formed at any position in the depth direction by changing the depth of the hole 10 and the amount of 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。   Subsequently, as shown in FIG. 2E, water W is sprayed from the ground surface around the pile. As a result, water permeates into the soil, and water is added to the mixing unit 20 in which the earth and stone and mortar are mixed, and as shown in FIG. Is formed. The mortar 30 is mainly in contact with the surface of the pile 1, so the mass 30 is firmly connected to the pile 1. Here, water sprinkling is, for example, more than the amount of water required when using mortar alone in a region about twice the diameter of the pile 1, and can form a massive portion 30 of a sufficient size We do by sowing the amount. The pile 1 is firmly installed by the presence of the lump 30 in the soil. In particular, when the pile 1 is pulled out, a large force is required because the large mass portion 30 acts as a resistance.

(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 the 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 for a short time and at low cost.

(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。
(Modification example)
In the present embodiment, mortar is used, but it is also possible to use a sand-free cement.

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 of FIG. 1 (B)-(D) can be repeated multiple times. For example, the size of the mixing unit 20 can be increased in the horizontal direction by repeating the introduction of the mortar M and the driving of the pile 1 into the hole 10 of the depth La, as shown in FIG. Thus, the size of the mass 30 can be increased. In addition, mortar M is introduced into the hole 10 of depth Lb, the pile 1 is driven to a depth Lc deeper than the depth Lb, and mortar is again formed into the hole 10 of depth Lc formed by pulling out the pile 1 once. It is possible to repeat that M is introduced and the pile 1 is driven to a depth deeper than the depth Lc. According to this, since the mixing part 20 can be formed at different positions in the depth direction, for example, as shown in FIG. 3 (B), the mass 30 is formed at a plurality of locations, or the size of the mass 30 Can be increased in the depth direction. Since the volume of the mass part 30 can be increased by these, 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, and first, a hole having a depth of 350 mm was punched into the soil to form a hole, into which 1 kg of mortar was introduced. A 1 kg mortar is an amount that substantially fills the hole. Then, after 350 mm of the pile was driven in again, the pile was extracted and 1 kg of mortar was further introduced into the hole. As a result, 2 kg of mortar is introduced into the 350 mm deep hole. Subsequently, after driving the pile to a depth of about 900 mm, water was sprayed around the pile. Sprinkling was carried out by pouring about 7 L of water in a region about twice the diameter of the pile. Here, the amount of water required when using the mortar 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。   The pullout test of the pile installed in this way was performed. While the pullout strength when the same pile was driven in under normal conditions is 200 to 400 kgf, the pullout strength of the pile according to the installation method of the present invention was 1500 kgf or more which exceeded the measurement range of the measuring apparatus.

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。 A state in which the lump portion is attached to the pulled out pile is shown in FIG. The mass was formed immediately below the surface, and was formed as a huge mass with about 500 mm in the depth direction, 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。 As mentioned above, according to the installation method of the pile of this invention, it was confirmed that strong installation is possible by 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以上の地表から深さ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 a pile from the ground surface to a predetermined depth L1;
Removing the drilled pile from the ground to form a hole;
Introducing a powdery mortar or cement into the hole;
Driving again piles from the ground surface having the predetermined depth L1 or more to the depth L2 into the holes into which the powdery mortar or cement has been introduced;
Step of sprinkling water from the ground surface around the pile, and installation method of the pile.
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JP7116516B1 (en) * 2022-02-08 2022-08-10 株式会社スペース二十四インフォメーション Strut fixing method
CN116988523A (en) * 2023-01-17 2023-11-03 中国电建集团昆明勘测设计研究院有限公司 Soft foundation treatment method adopting cement mixing piles

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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
JP4601525B2 (en) * 2005-09-09 2010-12-22 ジャパンパイル株式会社 Wooden pile burial method
JP4679465B2 (en) * 2006-08-04 2011-04-27 旭化成建材株式会社 Spiral rod and method of constructing structure using the same
JP4615507B2 (en) * 2006-12-21 2011-01-19 旭化成建材株式会社 Drilling rod
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