JPS6078015A - Construction of custom-made coated pile - Google Patents
Construction of custom-made coated pileInfo
- Publication number
- JPS6078015A JPS6078015A JP18531983A JP18531983A JPS6078015A JP S6078015 A JPS6078015 A JP S6078015A JP 18531983 A JP18531983 A JP 18531983A JP 18531983 A JP18531983 A JP 18531983A JP S6078015 A JPS6078015 A JP S6078015A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- casing
- ground
- coated
- press
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/60—Piles with protecting cases
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、杭周表面に負の摩擦力を低減する目的のアス
ファルトその他の瀝青材等を塗布し被覆せる所謂既製塗
布杭を、該塗布被覆層を傷損することなく所定の地盤に
確実かつ容易に施工するための既製塗布杭の施工方法に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a so-called ready-made coated pile in which the peripheral surface of the pile is coated with asphalt or other bituminous material for the purpose of reducing negative frictional force, without damaging the coated coating layer. This invention relates to a method for constructing ready-made coated piles for reliable and easy construction on a predetermined ground.
従来、沈下の憂いのある軟弱地盤に基礎杭を打設し、そ
の上に構造物を構築する場合、基礎杭支持力は杭先端の
みでなく杭と地盤との摩擦力によって与えられるもので
あるが、構造物の構築後に周辺地盤の圧密、沈下等が進
行して前記基礎杭に負の摩擦力(逆方向の摩擦力)が働
き、これかために予期以上の荷重が基礎杭にかかり基礎
杭を破誉
損し、さらに前記構造物にまて甚大なる被Tを及ぼして
いることは衆知である。Conventionally, when foundation piles are driven into soft ground that is susceptible to subsidence and structures are built on top of them, the foundation pile bearing capacity is provided not only by the pile tip but also by the frictional force between the pile and the ground. However, after the construction of the structure, consolidation and subsidence of the surrounding ground progress and a negative frictional force (frictional force in the opposite direction) acts on the foundation pile, which causes a higher than expected load to be applied to the foundation pile and damage the foundation. It is well known that the piles are damaged and the structure is also seriously damaged.
かかる事故防止対策から近時負の摩擦力を低減する目的
で下記の基礎杭が研究開発されている。As a measure to prevent such accidents, the following foundation piles have recently been researched and developed for the purpose of reducing negative frictional force.
例えばその主なものとしては、第1図〔イ〕のことく鋼
管杭あるいはコンクリート杭の柱体(a)の周表面全部
もしくはその一部にアスファルト等の瀝青材を塗布し被
覆したもの、さらには同図〔口〕のことく前記塗布被僚
層(b)の」二にプラスチック月料等による保護層(C
)を設けた既製塗布杭が用いられている。しかしこれら
の既存の塗布杭は通常杭の施工法としての打撃工法を予
め想定し静的な負の摩擦力をカットするのみの目的を有
するものであるから、因みにハンマー、バイブロ等の衝
撃荷重による打込工法による場合、仮に前記塗布被覆層
(b)や保護層(CJを剥離、変形することもなく施工
ができ得たとしても、杭を無音無振動の静的圧入により
施工する工法においては周辺土砂の摩擦作用等により前
記塗布被覆層(1))等が圧入施工時に変形、III
離し、特に−ヘンマー、やバイブロ等による打撃工法で
は施工が困難な砂礫層あるいは転石や玉石が混入してい
る地層では、上記塗布被覆層等の変形や剥離現象が著し
く、」二記塗布杭を損傷しないで無撮動、無騒音で施工
することは全く不可能で、負の摩擦力を低減しようとす
る所期の目的を完全に果し得ないものであった。For example, the main types are steel pipe piles or concrete piles whose entire or part of the peripheral surface is coated with bituminous material such as asphalt as shown in Figure 1 [A], and In the same figure, the coated employee layer (b) is covered with a protective layer (C) made of plastic, etc.
) are used. However, these existing coated piles are intended only for the purpose of cutting static negative friction forces, assuming that the impact method is the usual pile construction method. In the case of the driving method, even if construction could be carried out without peeling or deforming the coated coating layer (b) or the protective layer (CJ), in the method of constructing the pile by static press-fitting without noise and vibration, The applied coating layer (1) etc. is deformed during press-fitting due to the friction of surrounding earth and sand, etc.
In particular, in sandy and gravel layers that are difficult to construct using hammer, vibro, etc. hammer methods, or in strata containing boulders and cobbles, the deformation and peeling of the coated coating layer described above may be significant, and It was completely impossible to carry out construction without damage, without photography, and without noise, and the intended purpose of reducing negative frictional force could not be completely achieved.
本発明は、上記に鑑みて、特に砂礫層や転石等混入地層
等が存する地盤においても、既製塗布杭を塗布被覆層等
の損傷のおそれなく容易かつ確実に施工すべくなしたも
のである。In view of the above, the present invention has been made to allow ready-made coated piles to be easily and reliably constructed without fear of damage to the coated coating layer, etc., especially in the ground where there is a gravel layer, a stratum mixed with boulders, etc.
すなわち本発明は、杭周表面に臨青拐等を塗布し被覆し
た既製塗布杭を砂礫層あるいは転石や玉石等の混入した
地層等が存する地盤に施工するにおいて、先ず前記砂礫
層や転石等混入地層等の地盤をケーシングを外挿したス
クリューオーガーにより掘孔し、所定深度まで掘孔され
たなら前記ケーシングを地中に残してスクリューオーガ
ーを地上へ引き」二げろとともにケーシング内の土砂を
排出した後、掘孔圧入手段を内挿した既製塗布杭を前記
ケーシング内に挿入して、駆動モータにより回転する前
記掘孔圧入手段でもってケーシング下方地盤に対しさら
に掘孔しつつ圧入せしめ、この杭先端が所定深度に達す
れば、先端部ζこ根固め液を注入して前記掘孔圧入手段
を地」二へ引き」二げさらにMiJ記ケーシングを抜き
出して杭周回部に固結剤または砂等の補充材料を充填す
ることを特徴とするものである。That is, in the present invention, when constructing a ready-made coated pile whose circumferential surface of the pile is coated with Rinseikan or the like on the ground where there is a gravel layer or a stratum mixed with boulders, cobbles, etc., first, the sand and gravel layer, boulders, etc. A screw auger with a casing extrapolated into the ground, such as a geological formation, was used to dig a hole, and once the hole had been dug to a predetermined depth, the casing was left in the ground and the screw auger was pulled to the surface. After that, a ready-made coated pile with a hole press-fitting means inserted therein is inserted into the casing, and the hole press-fitting means rotated by a drive motor further drills and press-fits the pile into the ground below the casing. When the casing reaches a predetermined depth, a hardening liquid is injected into the tip of the pile, the hole press-in means is pulled down to the ground, and the MiJ casing is pulled out and a hardening agent or sand is applied to the area around the pile. It is characterized by being filled with replenishment material.
次ζζ木発明施工方法の実施態様を使用装置とともに第
2図〜第5図により説明する。Next, embodiments of the invention construction method for ζζ wood will be explained with reference to FIGS. 2 to 5 together with the equipment used.
図において、(1)は砂礫層あるいは転石や玉石等が混
入した地層(1a〕を含む地盤、(〜は杭体(a)の周
表面にアスファルトその他の瀝青材等を塗布し被覆した
既製塗布杭を示し、該既製塗布杭(A)を前記地盤は)
に次のようにして施工する。In the figure, (1) is the ground containing a gravel layer or a stratum (1a) mixed with boulders, boulders, etc. (~ is a ready-made coated material coated with asphalt or other bituminous material on the peripheral surface of the pile body (a)) Showing the pile, the ready-made coated pile (A) is in the ground)
It is constructed as follows.
先ず、第2図のように砂礫層や転石等混入地層(1a)
の地盤(1)を鋼管等よりなるケーシング(2)を外挿
したスクリューオーガー(3)により掘孔する。この場
合、ケーシング(2)は、図示のように上部の、駆動モ
ータ(4)と回転伝達手段(5)を介して連結してスク
リューオーガー(3)と逆方向に回転させながら圧入す
ることも、駆動モータ(4)に単に連接して回転させな
いて圧入することもてきる。また前記ケーシング(2)
の圧大長、つまり掘孔深度はケーシング(2)の先端が
砂礫層や転石等混入地響(ia)の底部あるいはそのF
層に達する程度とし、従って砂礫層や転石等混入地層(
1a)の深度にほぼ相当するようケーシング長を設定し
ておく。First, as shown in Figure 2, a stratum containing sand and gravel, boulders, etc. (1a) is formed.
A hole is excavated in the ground (1) using a screw auger (3) fitted with a casing (2) made of steel pipe or the like. In this case, the casing (2) may be press-fitted while being connected to the upper drive motor (4) via the rotation transmission means (5) and rotating in the opposite direction to the screw auger (3) as shown in the figure. , it is also possible to simply connect it to the drive motor (4) and press-fit it without rotating it. Also, the casing (2)
The compression length, that is, the depth of the borehole, is determined by the fact that the tip of the casing (2) is at the bottom of the ground echo (IA) mixed with sand and gravel layer, boulders, etc., or its F.
Therefore, it is necessary to avoid strata mixed with sand and gravel, boulders, etc.
The casing length is set to approximately correspond to the depth of 1a).
そして」1記のごとく所定深度にまで掘孔されたなら、
ケーシング(2)を地中に残してスクリューオーガー(
3)を地」ニへ引き上げ、ケーシング内土砂、即ちスク
リュー羽根間の土砂を地上に排出する。If the hole is dug to the specified depth as described in 1.
Leave the casing (2) underground and use the screw auger (
3) is lifted to the ground, and the earth and sand inside the casing, that is, the earth and sand between the screw blades, is discharged to the ground.
その後、第3図のように、例えば先端fこ掘削ヘッド(
6a)を有するオーガー等の掘孔圧入手段(6)をX内
挿した既製塗布抗(5)を」1記ケーシング(2)内に
挿入して、」一部の駆動モータ(4)からの回転伝達に
より掘孔圧入手段(6)を回転駆動させ、ケーシング(
2)の下方地盤に対して抗先論地盤をさらを
に掘孔しつつ1)IJ記杭n4圧入せしめる。この際、
前記掘孔圧入手段(6)の掘削ヘッド(6a)を、第6
図および第7図に拡大して示すように回転の正逆により
支持ピン(13)を支点に開閉、つまり正転により拡開
(実線)し逆転により縮径(鎖線)する拡大刃(7)を
備えたヘッド構造とし、該拡大刃(マ)を抗い)の先端
部に溶着しだ係合突起(8)に係合させ、杭(A+を同
伴回転させて圧入してもよく、(14)は前記拡大刃(
7)の支持台部、(15)は拡大刃(7)のストッパー
を示す。また杭」1方の駆動モータ(4)に図に示す巻
込み装置(9)を設け、力帆王機ドラムの巻込み力によ
り抗い)に下問きの力を与えて圧入してもよい。さらに
杭の圧入抵抗か大きい場×S台、掘削ヘッド(6a〕の
先端に有するノズル部(16)よりヘントナイト等を吐
出し地盤をゆるめなから掘孔すれはよい。なお前記既製
塗布抗い)にはケーシング(2)内への貫入時に杭外周
面かケーシング内周面に接触して損、傷しないように杭
体端部等の適所に振れ止め片(10)を周方回所要牧
間隔毎に複道個設けておくのか望ましい。After that, as shown in Fig. 3, for example, the tip of the drilling head (
Insert the ready-made coating hole (5) into which the borehole press-fitting means (6) such as an auger (6a) with X is inserted into the casing (2), The borehole press-fitting means (6) is rotationally driven by the rotational transmission, and the casing (
While digging a hole further into the ground below 2), press in 1) IJ pile n4. On this occasion,
The excavation head (6a) of the borehole press-fitting means (6) is
As shown in Fig. 7 and enlarged in Fig. 7, the enlarged blade (7) opens and closes using the support pin (13) as a fulcrum by rotating in the forward and reverse directions, that is, the enlarged blade (7) expands in the normal direction (solid line) and contracts in diameter (dashed line) in the reverse direction. The head structure may be such that the enlarged blade (A+) is engaged with the engagement protrusion (8) welded to the tip of the enlarged blade (A+), and the stake (A+) is rotated together and press-fitted (14). ) is the enlarged blade (
7) is the support part, and (15) shows the stopper of the enlarging blade (7). Alternatively, the drive motor (4) on one side of the pile may be provided with a winding device (9) as shown in the figure, and the pile may be press-fitted by applying a lower force to the winding force of the Lifan Wangki drum. Furthermore, if the pile resistance is large, use the nozzle part (16) at the tip of the excavation head (6a) to discharge hentonite, etc., to loosen the ground and make it easier to dig the hole. In order to prevent damage due to contact with the outer circumferential surface of the pile or the inner circumferential surface of the casing when penetrating into the casing (2), a steady rest piece (10) is installed at the appropriate place such as the end of the pile at the required shedding interval. It is desirable to have multiple roads in the area.
こうして既製塗布抗い)を、必要に応じて第3図のよう
に適宜杭や掘孔圧入手段の軸管等を継足して所定の深度
まで圧入するもので、杭先端が支持層等の所定深度に達
すれは、第4図のよ(6の
うに掘孔圧入手段(6)の先端の掘削ヘッド(5)の部
分よりセメントミルク、モルタル等の根固め液を注入し
て杭先端部を根固めするとともに、掘孔圧入手段(6)
を地」二に引き」二ける。(11)は根固め部を示す。In this way, the ready-made coated resistance is press-fitted to a predetermined depth by adding appropriate piles and shaft pipes of the borehole press-in means as shown in Figure 3 as necessary, so that the tip of the pile is at a predetermined depth such as the support layer. When this is achieved, as shown in Figure 4 (6), cement milk, mortar, or other hardening liquid is injected from the excavation head (5) at the tip of the hole press-in means (6) to harden the tip of the pile. At the same time, the hole press-fitting means (6)
Subtract 2 and subtract 2 from the ground. (11) indicates the hardening section.
さらに、初めに打設したケーシング(2)を、駆動モー
タに連結して回転させながら、あるいはバイブロ機で振
動を与えなから、あるいは単にカ也工機ワイヤーで吊り
」二げるようにして地上へ抜き出すとともに、該抜き出
し跡の杭周回部に適宜補充材料(I21を充填する(第
5図)。例えば、iiJ記ケーシング抜き出しの際、ケ
ーシング(2)の周部に縦設した注入パイプ(図示せず
)より杭周と地盤とを固結するためのセメントミルク、
モルタル等の固結剤を注入する。これに代えケーシング
外き出し後に砂等を補充材料(12として充填すること
もてきる。Furthermore, the initially cast casing (2) is raised above the ground by connecting it to a drive motor and rotating it, by applying vibrations with a vibro machine, or by simply suspending it with a machine wire. At the same time, fill the surrounding area of the pile with supplementary material (I21) as appropriate (Fig. 5). For example, when extracting the casing (ii (not shown) cement milk to solidify the pile circumference and the ground;
Inject a hardening agent such as mortar. Alternatively, it is also possible to fill the casing with a supplementary material (12), such as sand, after taking it out.
」1記のように本発明によれば、既製塗布抗を施]ユす
べき地盤を予じめ掘孔してケーシングを圧入し、前記塗
布杭を圧入するのに困難な転石、玉石等を地」二に撤去
した後、ケーシング内へ塗布杭を挿入して施工するから
、ケーシング下端より−F方地盤への杭圧入を容易に行
なえるばかりか、ケーシング外壁面のA巣、玉石等の崩
壊落下かなく、塗布面の変形剥離や損傷等を生じること
なく確実に圧入、施工でき、負の摩擦力を低減する既製
塗布抗の性能を損なうことなく施工できるものである。1, according to the present invention, a hole is drilled in advance in the ground where the ready-made coated pile is to be installed, the casing is press-fitted, and boulders, boulders, etc., which are difficult to press-fit the coated pile, are removed. After removal from the ground, the coated piles are inserted into the casing for construction, which not only makes it easy to press the piles into the ground in the -F direction from the lower end of the casing, but also prevents damage to A-holes, cobblestones, etc. on the outer wall of the casing. It can be reliably press-fitted and installed without collapsing or falling, causing deformation, peeling, or damage to the coated surface, and can be installed without impairing the performance of ready-made coated resistors that reduce negative frictional force.
特に既製螢布杭の圧入を拡大刃を有する掘孔圧入手段を
用いて行なう場合、杭に回転を与えて圧入するから、ケ
ーシング下方への圧入か容易で、また拡大刃を塗布抗外
径より突出したものを用いると、杭外周を余掘りするこ
とになるから、塗布面と掘孔壁面との接触を少くてき、
一層像布面の損傷か少くなる。In particular, when press-fitting ready-made burlap piles using a hole press-fitting means with an enlarged blade, since the pile is rotated and press-fitted, it is easy to press-fit it downwards into the casing, and the enlarged blade can be used from the outside diameter of the coating. If a protruding material is used, the outer circumference of the pile will have to be excavated, so contact between the coated surface and the hole wall can be minimized.
Damage to the image cloth surface is further reduced.
第1図(イ)および((ロ)はそれぞれ既製塗布抗を例
示する一部縦断正面図、第2図〜第5図は施]二状態を
示す断面図、第6図は掘削ヘッド部分拡大i、I′:、
面図、第7図は前回■−■I線の断面図である。
Δ)・・・既製塗布抗、(al 杭体、(1))・・・
塗布被覆層、FC+・保護層、(1)・・地盤、(1a
)・・・砂 層あるいは転石等混入地層、(2)・・・
ケーシング、(3)・・・スクリニーオーガー、(4)
・・駆動モータ、(6)・・・掘孔圧入手段、(11)
・・根固め部、口z・・・補充材料。
特許出願人 株式会社 武官工務所“。
代理人 ゝ [B i −+ 1″、、1ほか□名゛−
第1図Figures 1 (a) and (b) are partially longitudinal front views illustrating ready-made coated pits, Figures 2 to 5 are cross-sectional views showing two states, and Figure 6 is an enlarged portion of the excavation head. i, I′:,
The top view and FIG. 7 are cross-sectional views taken along the previous line ■-■I. Δ)...ready-made coated pile, (al pile body, (1))...
Application coating layer, FC+/protective layer, (1)...ground, (1a
)...Sand layer or stratum mixed with rolled stones, etc., (2)...
Casing, (3)...Screeny auger, (4)
・・Drive motor, (6) ・・Drilling hole press-fitting means, (11)
・・Root hardening part, mouth z・・Replenishment material. Patent applicant: Attaché Co., Ltd. Agent: ゝ [B i −+ 1″,, 1 and others □ Name ゛− Figure 1
Claims (1)
砂礫層あるいは転石や玉石等の混入した地層等が存する
地盤に施工するにおいて、先ず前記砂礫層や転石等混入
地層等の地盤をケーシングを外挿したスクリューオーガ
ーにより掘孔し、所定深度まで掘孔されたなら前記ケー
シングを地中に残してスクリューオーガーを地上へ引き
上けるとともにケーシング内の土砂を排出した後、掘孔
圧入手段を内挿した既製塗布杭を前記ケーシング内に挿
入して、駆動モータにより回転する前記掘孔圧入手段で
もってケーシング下方地盤に対しさらに掘孔しつつ圧入
せしめ、この杭先端が所定深度に達すれば、先端部に根
固め液を注入して前記掘孔圧入手段を地上へ引き上け、
さらに前記ケーシングを抜き出して杭周回部に固結剤ま
たは砂等の補充材料を充填することを特徴とする既製塗
布杭の施工方法。1. When constructing ready-made coated piles coated with A Yougetsu on the surrounding surface of the pile, in the ground where there is a sandy gravel layer or a stratum mixed with boulders, cobbles, etc., first, the ground is coated with a sandy gravel layer or a stratum mixed with boulders, etc. A hole is dug using a screw auger with a casing inserted into it, and once the hole has been dug to a predetermined depth, the casing is left in the ground and the screw auger is pulled up to the ground, and the earth and sand inside the casing are discharged, and then the hole is press-fitted. A ready-made coated pile with a means inserted therein is inserted into the casing, and the pile is press-fitted while further digging into the ground below the casing by the hole press-fitting means rotated by a drive motor, until the tip of the pile reaches a predetermined depth. For example, injecting a root hardening solution into the tip and lifting the bore hole press-fitting means above the ground;
A method for constructing a ready-made coated pile, further comprising the step of extracting the casing and filling the surrounding area of the pile with a supplementary material such as a consolidation agent or sand.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18531983A JPS6078015A (en) | 1983-10-03 | 1983-10-03 | Construction of custom-made coated pile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18531983A JPS6078015A (en) | 1983-10-03 | 1983-10-03 | Construction of custom-made coated pile |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6078015A true JPS6078015A (en) | 1985-05-02 |
JPS6146612B2 JPS6146612B2 (en) | 1986-10-15 |
Family
ID=16168751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18531983A Granted JPS6078015A (en) | 1983-10-03 | 1983-10-03 | Construction of custom-made coated pile |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6078015A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011140765A (en) * | 2010-01-05 | 2011-07-21 | Takenaka Komuten Co Ltd | Method of driving pile |
-
1983
- 1983-10-03 JP JP18531983A patent/JPS6078015A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011140765A (en) * | 2010-01-05 | 2011-07-21 | Takenaka Komuten Co Ltd | Method of driving pile |
Also Published As
Publication number | Publication date |
---|---|
JPS6146612B2 (en) | 1986-10-15 |
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