JPH07900B2 - Pile driving method - Google Patents
Pile driving methodInfo
- Publication number
- JPH07900B2 JPH07900B2 JP63040178A JP4017888A JPH07900B2 JP H07900 B2 JPH07900 B2 JP H07900B2 JP 63040178 A JP63040178 A JP 63040178A JP 4017888 A JP4017888 A JP 4017888A JP H07900 B2 JPH07900 B2 JP H07900B2
- Authority
- JP
- Japan
- Prior art keywords
- pile
- dummy
- driving
- main
- length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 11
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Landscapes
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Description
【発明の詳細な説明】 《産業上の利用分野》 本発明は杭打設方法に係り、特に硬質地盤に対する長尺
杭の打設方法の改善に関するものである。Description: TECHNICAL FIELD The present invention relates to a pile driving method, and more particularly to improvement of a method for driving a long pile on a hard ground.
《従来の技術》 Ｈ型鋼,I型鋼，鋼矢板あるいは鋼管杭等の杭類を地盤に
打設する場合は一般的にバイブロハンマなどの振動杭打
機が用いられる。この振動杭打機はクレーンから吊げら
れ、杭の端末に装着して振動を与え、この振動で杭の先
端を地盤に貫入させるようになっている。<Prior art> When driving piles such as H type steel, I type steel, steel sheet pile or steel pipe piles into the ground, a vibrating hammer or other vibrating pile driver is generally used. This vibrating pile driver is hung from a crane and attached to the end of the pile to give vibration, and the vibration causes the tip of the pile to penetrate into the ground.
《発明が解決しようとする課題》 しかし、従来の杭打設方法は振動杭打機によって一気に
杭を打込んでいたので、岩盤のように地盤が硬い場合に
は打込み抵抗によって杭が座屈曲げを生じやすい。この
ため従来は硬質地盤に対する杭打は比較的短い杭に限ら
れており、長尺の杭を打設する方法の開発が望まれてい
た。<Problems to be solved by the invention> However, in the conventional pile driving method, since the pile was driven at once by the vibrating pile driver, when the ground is hard like rock, the pile may bend and bend due to the driving resistance. Prone to For this reason, conventionally, pile driving on hard ground is limited to relatively short piles, and development of a method for driving long piles has been desired.
本発明は上述の課題を有効に解決すべく創案するに至っ
たものであって、その目的は硬質地盤に対しても比較的
長尺の杭を座屈曲げを生じさせずに垂直に打設すること
のできる杭打設方法を提供することにある。The present invention has been devised to effectively solve the above problems, and its purpose is to drive a relatively long pile vertically against hard ground without causing seat buckling. It is to provide a pile driving method that can be performed.
《課題を解決するための手段》 前記課題を解決するため本発明は、硬質地盤に対する本
杭の打設に先立ち、前記本杭と断面形状が等しく前記本
杭よりも長さが短いダミー杭を打設し、前記ダミー杭を
引き抜いて前記本杭の断面形状と略同一の断面形状を有
する縦孔を形成し、しかる後に前記本杭を前記縦孔内に
挿入して打設するようにしたことを特徴とするものであ
る。<< Means for Solving the Problems >> To solve the problems, the present invention, prior to the placement of the main pile to the hard ground, a dummy pile having a cross-sectional shape equal to that of the main pile and a shorter length than the main pile. Punching, pulling out the dummy pile to form a vertical hole having a cross-sectional shape substantially the same as the cross-sectional shape of the main pile, and then inserting the main pile into the vertical hole It is characterized by that.
ここで、上記記載において硬質地盤とは、ジェット水の
噴射によって容易に緩めることのできない程度の硬さを
有する、例えば岩盤等をとう。Here, in the above description, the hard ground is, for example, bedrock or the like having a hardness that cannot be easily loosened by jetting jet water.
《作用》 前記の如く構成した杭打設方法では、予め形成された本
杭と略同一の断面形状を有する縦孔内に本杭の下方部分
を挿入することによって、本杭を一気に打設する場合に
比べて本杭の座屈長を短くすることができるので、硬質
地盤に対して長尺杭を座屈曲げを生ずることなく垂直に
打込むことができる。なお、長さの異なる数本のダミー
杭を用いれば打設可能な本杭の長さをさらに延長するこ
とができる。<< Operation >> In the pile driving method configured as described above, the main pile is driven at a stretch by inserting the lower portion of the main pile into the vertical hole having substantially the same cross-sectional shape as the preformed main pile. Since the buckling length of the main pile can be shortened as compared with the case, the long pile can be driven vertically into the hard ground without causing buckling. In addition, the length of the main pile which can be driven can be further extended by using several dummy piles having different lengths.
《実施例》 以下に本発明の一実施例を図面に基づいて説明する。Example An example of the present invention will be described below with reference to the drawings.
第１図（Ａ），（Ｃ）に示す如く、本発明の杭打設方法
では長短２本のダミー杭1,2を用いる。これらダミー杭
1,2の打込長さL1,L2は本杭３の打込長さL3（例えば35
m）の約1/3（12m）と2/3（24m）とされており、またダ
ミー杭1,2の断面形状は本杭３と全く同じにされてい
る。本杭３の断面形状はＨ型,I型，丸型などどのような
形状でもよい。As shown in FIGS. 1 (A) and 1 (C), two long and short dummy piles 1 and 2 are used in the pile driving method of the present invention. These dummy piles
The driving lengths L 1 and L 2 of 1 , 2 are the driving lengths L 3 (eg 35
It is about 1/3 (12 m) and 2/3 (24 m) of m), and the dummy piles 1 and 2 have the same sectional shape as the main pile 3. The cross-sectional shape of the main pile 3 may be any shape such as H-shaped, I-shaped or round.
次に打設方法について述べる。まず短い方のダミー杭１
の末端を第２図に示す如くクレーン４から吊下げたバイ
ブロハンマ５で支持する。そしてバイブロハンマ５を駆
動してダミー杭１に振動を与え、第１図（Ａ）に示す如
くダミー杭１を打設する。これまでの打設工程は通常の
杭打と何ら変わらない。次にバイブロハンマ５を駆動し
つつ第１図（Ａ）で矢印方向にダミー杭１を引上げる。
ダミー杭１を引上げると地盤６には第１図（Ｂ）に示す
如く長さL1の垂直な縦孔７が形成されて残る。次に、こ
の縦孔７に長い方のダミー杭２を挿入し、バイブロハン
マ５を駆動してさらに長さL2までダミー杭２を打込む。
その後バイブロハンマ５を駆動しつつ第１図（Ｃ）で矢
印方向にダミー杭２を引上げると、第１図（Ｄ）に示す
如く長さL2の垂直な縦孔８が形成されて残る。そして最
後に本杭３を縦孔８に挿入し、バイブロハンマ５を駆動
してさらに長さL3まで本杭３を打込む。このとき本杭３
の座屈長は、その下方部分を縦孔８内に挿入することに
より、従来のように一気に打込む場合に比べて実質的に
約1/3の長さになる。従って硬質地盤に対して長尺杭を
真直かつ垂直に打込むことが可能になる。Next, the placing method will be described. First, the shorter dummy pile 1
2 is supported by a vibro hammer 5 suspended from a crane 4 as shown in FIG. Then, the vibro hammer 5 is driven to give vibration to the dummy pile 1, and the dummy pile 1 is driven as shown in FIG. 1 (A). The driving process up to now is no different from normal pile driving. Next, while driving the vibro hammer 5, the dummy pile 1 is pulled up in the direction of the arrow in FIG.
When the dummy pile 1 is pulled up, a vertical vertical hole 7 having a length L 1 is formed and left in the ground 6 as shown in FIG. 1 (B). Next, the longer dummy pile 2 is inserted into the vertical hole 7, and the vibro hammer 5 is driven to drive the dummy pile 2 up to the length L 2 .
When the dummy pile 2 is pulled up in the direction of the arrow in FIG. 1 (C) while driving the vibro hammer 5 thereafter, a vertical vertical hole 8 having a length L 2 is formed and remains as shown in FIG. 1 (D). Finally this pile 3 is inserted into the vertical hole 8, implanted the pile 3 further to a length L 3 and drives the vibro-hammer 5. Main pile 3 at this time
The buckling length of is about 1/3 of the length when the lower portion is inserted into the vertical hole 8 as compared with the conventional case where it is driven all at once. Therefore, it becomes possible to drive a long pile straightly and vertically to the hard ground.
なお、前記ダミー杭2,2は繰返し使用するものであり、
本杭３を打設完了した後はこの本杭３に隣接する位置ま
たは他の位置に運搬して縦孔7,8の形成を行なう。The dummy piles 2 and 2 are used repeatedly,
After the driving of the main pile 3 is completed, the main pile 3 is transported to a position adjacent to the main pile 3 or another position to form the vertical holes 7 and 8.
本実施例では長短２本のダミー杭1,2を用いたが、本杭
３の打込み長さL3がそれほど長くなければダミー杭は１
本でもよい。この反対に打込み長さL3が本実施例よりも
長い場合は２本以上のダミー杭を用いればよい。この場
合各ダミー杭の長さは等差級数的に変化させてもよい
が、打込み長さの増大に伴う打込み抵抗の上昇を考慮し
て長くなるほど長さの変化が少なくなるようにしてもよ
い。このようにすれば各ダミー杭の打込み抵抗に対する
負担を平均化できる。In the present embodiment, two long and short dummy piles 1 and 2 were used, but if the driving length L 3 of the main pile 3 is not so long, the dummy pile 1
It may be a book. On the contrary, when the driving length L 3 is longer than that of this embodiment, two or more dummy piles may be used. In this case, the length of each dummy pile may be changed in an arithmetic series, but the length change may be reduced as the length increases in consideration of the increase in driving resistance accompanying the increase in driving length. . In this way, the burden on the driving resistance of each dummy pile can be averaged.
以上、本発明の一実施例につき述べたが、本発明は上記
実施例の構成に限定されることなく種々の変形が可能で
あって、例えばダミー杭，本杭の打込みは振動杭打機に
限らず他の打込機を使用してもよい。Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration of the above embodiment, and various modifications are possible. Not limited to this, another driving machine may be used.
《発明の効果》 本発明は上述の如く、ジェット水の噴射によっては地盤
を緩めることのできない例えば岩盤等の硬質地盤に本杭
を打設する場合でかつ本杭が長尺のものである場合で
も、本杭に座屈を生じさせることなく、真直かつ垂直
に、容易に地中に打設することができる。<Effects of the Invention> As described above, the present invention is a case where the main pile is placed on hard ground such as bedrock, which cannot loosen the ground by jetting jet water, and the main pile is long. However, the pile can be easily and straightly driven into the ground without buckling the pile.
また、ダミー杭は本杭を寸詰めすることにより容易に得
ることもでき、かつ繰返して使用できるものであるから
施工コストは非常に安価ですむ。In addition, the dummy pile can be easily obtained by squeezing the main pile and can be used repeatedly, so the construction cost is very low.
図面は本発明の一実施例を示したものであって、第１図
（Ａ）〜（Ｅ）は打込み工程を示す地中縦断面図、第２
図はクレーンの側面図である。 1,2……ダミー杭、３……本杭 ５……バイブロハンマ、7,8……縦坑The drawings show one embodiment of the present invention, and FIGS. 1 (A) to (E) are vertical sectional views in the ground showing a driving step, and FIG.
The figure is a side view of the crane. 1,2 …… Dummy pile, 3 …… Main pile 5 …… Vibro hammer, 7,8 …… Vertical shaft
Claims (1)
記本杭と断面形状が等しく前記本杭よりも長さが短いダ
ミー杭を打設し、前記ダミー杭を引き抜いて前記本杭の
断面形状と略同一の断面形状を有する縦孔を形成し、し
かる後に前記本杭を前記縦孔内に挿入して打設するよう
にしたことを特徴とする杭打設方法。1. Prior to the driving of the main pile to the hard ground, a dummy pile having the same sectional shape as the main pile and a shorter length than the main pile is driven, and the dummy pile is pulled out to remove the main pile. A pile driving method characterized in that a vertical hole having a cross-sectional shape substantially the same as the cross-sectional shape is formed, and then the main pile is inserted into the vertical hole and driven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63040178A JPH07900B2 (en) | 1988-02-23 | 1988-02-23 | Pile driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63040178A JPH07900B2 (en) | 1988-02-23 | 1988-02-23 | Pile driving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01214617A JPH01214617A (en) | 1989-08-29 |
| JPH07900B2 true JPH07900B2 (en) | 1995-01-11 |
Family
ID=12573524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63040178A Expired - Lifetime JPH07900B2 (en) | 1988-02-23 | 1988-02-23 | Pile driving method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07900B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS545607A (en) * | 1977-06-15 | 1979-01-17 | Matsushita Electric Ind Co Ltd | Push-button tuner |
-
1988
- 1988-02-23 JP JP63040178A patent/JPH07900B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01214617A (en) | 1989-08-29 |
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