JPH04209206A - Establishment of anchor foundation pile - Google Patents
Establishment of anchor foundation pileInfo
- Publication number
- JPH04209206A JPH04209206A JP34021290A JP34021290A JPH04209206A JP H04209206 A JPH04209206 A JP H04209206A JP 34021290 A JP34021290 A JP 34021290A JP 34021290 A JP34021290 A JP 34021290A JP H04209206 A JPH04209206 A JP H04209206A
- Authority
- JP
- Japan
- Prior art keywords
- auger
- steel pipe
- blade
- auger rod
- pipe pile
- 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
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 64
- 239000010959 steel Substances 0.000 claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 44
- 238000003756 stirring Methods 0.000 claims abstract description 34
- 238000009412 basement excavation Methods 0.000 claims abstract description 30
- 230000002265 prevention Effects 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 17
- 238000007711 solidification Methods 0.000 claims description 17
- 230000008023 solidification Effects 0.000 claims description 17
- 239000003381 stabilizer Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 230000003449 preventive effect Effects 0.000 abstract 3
- 238000010276 construction Methods 0.000 description 20
- 239000002689 soil Substances 0.000 description 8
- 238000005553 drilling Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- 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】
［産業上の利用分野］
本発明は、建設関係の基礎工事に適用されるアンカー基
礎杭の造成方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for constructing anchor foundation piles applied to construction-related foundation work.
［従来の技術］ 従来、基礎杭の造成工法には、種々の工法が存在する。[Conventional technology] Conventionally, there are various methods for constructing foundation piles.
例えば、下記の通りである。For example, as follows.
（１１アースアンカーによる工法は、ワイヤーロープ等
の引張り材を地盤中に挿入して、グラウト等により固着
することにより引き抜き力に対応する基礎工法である。(11) The earth anchor construction method is a foundation construction method that responds to pull-out forces by inserting a tensile material such as a wire rope into the ground and fixing it with grout or the like.
（２）既製杭（既製コンクリート杭、鋼管杭）による工
法は、杭打機で地盤中に既製杭を打込むものと、−旦地
盤にプレボーリングし、その孔にセメントモルタル等の
固化液を所定量注入した後既製杭を沈設し、既製杭と孔
内壁間を固化液で固めるものとがある。(2) Construction methods using ready-made piles (ready-made concrete piles, steel pipe piles) include driving the ready-made piles into the ground with a pile driver, and - pre-boring the ground and filling the holes with a solidifying liquid such as cement mortar. In some cases, a prefabricated pile is placed after a predetermined amount is injected, and the space between the prefabricated pile and the inner wall of the hole is solidified with a solidifying liquid.
（３）場所打ち杭による工法は、地盤を掘削して排土し
、その孔に鉄筋かごを入れ、これにコンクリートを流し
込んだものが一般的である。(3) The general method of construction using cast-in-place piles is to excavate the ground, remove the soil, insert a reinforcing cage into the hole, and pour concrete into it.
［発明が解決しようとする課題］
構造物が大型化、高層化すると地震時に基礎杭には大き
な押し込み力と引き抜き力が交互に作用するようになる
。本発明はこの大きな押し込み力と引き抜き力に耐え、
かつ上部工と確実に応力伝達できる基礎杭を提供する。[Problems to be Solved by the Invention] As structures become larger and taller, large pushing forces and pulling forces alternately act on foundation piles during an earthquake. The present invention can withstand this large pushing force and pulling force,
The present invention also provides a foundation pile that can reliably transmit stress to the superstructure.
しかしながら、前記従来の工法には、いずれも次のよう
な欠点がある。However, all of the conventional construction methods have the following drawbacks.
前記（１）のアースアンカーによる工法については、ア
ースアンカーは引き抜き力には耐えるが押し込み力には
ほとんど無抵抗である。Regarding the construction method using the earth anchor (1) above, the earth anchor can withstand pull-out force, but has almost no resistance to push-in force.
前記（２）の既製コンクリート杭による工法については
、既製コンクリート抗は押し込み力には比較的強いが、
引き抜き力には弱く、かつ引き抜き力に対して上部工と
確実に応力伝達できる接続方法もない。Regarding the construction method using prefabricated concrete piles (2) above, prefabricated concrete piles are relatively strong against pushing force, but
It is weak against pull-out force, and there is no connection method that can reliably transmit stress to the superstructure against pull-out force.
また、鋼管杭による工法については、鋼管杭は材料自体
は引っ張り力に対して強いが、鋼管と地盤との付着力が
小さく、かつ自重も小さいため引き抜きに対する抵抗力
が弱い。Regarding construction methods using steel pipe piles, although the material of steel pipe piles itself is strong against tensile forces, the strength of adhesion between the steel pipe and the ground is small, and the pile's own weight is also small, so it has low resistance to pulling out.
また、地盤との付着カケ向上させるためにブレポーリン
グ工法による杭周固定液を用いたとしても従来のプレポ
ーリング工法では地盤を弛めるため引き抜き力の向上は
望めない。よしんば地盤を緩めずに施工できたとしても
鋼管と杭周固定液との付着力は比較的小さい。Further, even if a pile circumferential fixing solution is used by the pre-poling method to improve the adhesion to the ground, the conventional pre-poling method loosens the ground and cannot be expected to improve the pulling force. Even if construction could be done without loosening the Yoshiba ground, the adhesion force between the steel pipe and the pile circumferential fixing fluid is relatively small.
前記（３）の場所打ち杭による工法については、場所打
ち杭はそれ自体は押し込み力にも引き抜き力にも強く、
かつ引き抜き力に対して上部工と確実に応力伝達できる
接続方法も確立されている。Regarding the construction method using cast-in-place piles in (3) above, cast-in-place piles themselves are strong against pushing force and pulling force;
A connection method has also been established that can reliably transmit stress to the superstructure against pull-out force.
しかしながら、場所打ち杭はその施工方法のため泥水や
残土等が大量に発生するため、今や社会問題になってお
り市街地での施工は実質的に困難である。However, because cast-in-place piles generate large amounts of muddy water and residual soil due to their construction method, they have become a social problem and are practically difficult to construct in urban areas.
本発明は上述した従来の欠点を解決するために成された
ものである。The present invention has been made to solve the above-mentioned conventional drawbacks.
［課題を解決するだめの手段］
本発明は上記目的を達成するため、オーガーはオーガー
ロッドの途中に少なくとも１個のスタビライザが回転自
在に遊嵌され、前記オーガーロッドの先端に掘削翼が、
その上段に攪拌翼及び共回り防止翼が配設され、前記掘
削翼と攪拌翼とはそれぞれオーガーロッドに固着された
支持部材に枢軸により枢着され、前記共回り防止翼は支
持部材を介してオーガーロッドに回転自在に遊嵌される
と共に、支持部材に枢軸により枢着され、前記掘削翼、
攪拌翼及び共回り防止翼はそれぞれ支持部材に枢軸とシ
ャーピンにより拡開状態に保持されており、前記オーガ
ーを地上で準備し、別途に準備した外周面リブ付きの鋼
管杭下端より前記掘削翼、攪拌翼及び共回り防止翼を先
行させた状態でオーガーロッドを前記鋼管坑内に挿入す
る工程と、オーガーロッドと鋼管杭上端をそれぞれ作業
機に把持させ、オーガーと鋼管杭をそれぞれ」回転させ
つつ、同時にオーガー先端からスラリー状の固化材を吐
出し、地盤の所定深度まで給進する工程と、次に、オー
ガーロッドと鋼管杭の給進を停止し、固化材の注入を、
それまでに注入した固化材よりも固化後の圧縮強度が大
きなスラリー状固化材に切り替え削孔底部の根固め部を
その固化材で充満する工程と、次に、鋼管杭を固定した
状態でオーガー軸を引揚げて前記シャーピンを剪断し、
共回り防止翼、攪拌翼及び掘削翼を鋼管坑内に縮閉する
工程と、次に、鋼管杭を回転させながら前記根固め部内
に挿入する工程と、その後、前記オーガーを引揚げる工
程とより成ることを特徴とするアンカー基礎杭の造成方
法と、
オーガーはオーガーロッドの途中に少なくとも１個のス
タビライザが回転自在に遊嵌され、前記オーガーロッド
の先端に掘削翼が、その上段に攪拌翼及び共回り防止翼
が配設され、前記掘削翼と攪拌翼とはそれぞれオーガー
ロッドに固着された支持部材に枢軸により枢着され、前
記共回り防止翼は支持部材を介してオーガーロッドに回
転自在に遊嵌されると共に、支持部材に枢軸により枢着
され、前記掘削翼、攪拌翼及び共回り防止翼はそれぞれ
支持部材に枢軸とシャーピンにより拡開状態に保持され
ており、前記オーガーを地上で準備し、別途に準備した
外周面リブ付きの鋼管杭下端より前記掘削翼、攪拌翼及
び共回り防止翼を先行させた状態でオーガーロッドを前
記鋼管坑内に挿入する工程と、オーガーロッドと鋼管杭
上端をそれぞれ作業機に把持させ、オーガーと鋼管杭を
それぞれ回転させつつ、同時にオーガー先端からスラリ
ー状の固化材を吐出し、削孔底部の根固め部の距離だけ
浅い地盤の深度まで給進する工程と、次に、固化材の注
入を、それまでに注入した固化材よりも固化後の圧縮強
度が大きなスラリー状固化材に切り替え、前記根固め部
の距離だけ固化材を注入しつつ所定深度まで削孔する工
程と、次に、鋼管杭を固定した状態でオーガー軸を引揚
げて前記シャーピンを剪断し、共回り防止翼、攪拌翼及
び掘削翼を鋼管坑内に縮閉する工程と、次に、鋼管杭を
回転させながら前記根固め部内に挿入する工程と、その
後、前記オーガーを引揚げる工程とより成ることを特徴
とするアンカー基礎杭の造成方法と、
前記鋼管杭にはその内周面の下部に固化材との付着力向
上のための少なくとも１個以上のリング状の突起が固設
されていることを特徴とするアンカー基礎杭の造成方法
である。[Means for Solving the Problems] In order to achieve the above object, the present invention has an auger in which at least one stabilizer is rotatably fitted in the middle of an auger rod, and a digging wing is provided at the tip of the auger rod.
A stirring blade and a co-rotation prevention blade are disposed on the upper stage, and the excavation blade and the stirring blade are each pivoted to a support member fixed to an auger rod, and the co-rotation prevention blade is attached to a support member fixed to the auger rod. The excavation wing is rotatably loosely fitted to the auger rod and is pivotally connected to the support member,
The stirring blades and the co-rotation prevention blades are each held in an expanded state by a support member with a pivot and a shear pin, and the auger is prepared on the ground, and the excavation blades, Inserting the auger rod into the steel pipe shaft with the stirring blade and the co-rotation prevention blade in advance, and having the auger rod and the upper end of the steel pipe pile each gripped by a working machine, and rotating the auger and the steel pipe pile respectively, At the same time, a slurry-like solidification material is discharged from the tip of the auger and fed to a predetermined depth in the ground.Next, the feeding of the auger rod and steel pipe pile is stopped, and the solidification material is injected.
The process of switching to a slurry solidified material that has a higher compressive strength after solidification than the previously injected solidified material and filling the hardening section at the bottom of the drilled hole with the solidified material, and then the auger with the steel pipe pile fixed. pulling up the shaft and shearing the shear pin;
It consists of the steps of contracting and closing the co-rotation prevention blades, stirring blades, and excavation blades in the steel pipe mine, then inserting the steel pipe pile into the foot protection part while rotating, and then lifting the auger. A method for constructing an anchor foundation pile, characterized in that the auger has at least one stabilizer rotatably fitted in the middle of the auger rod, a digging blade is provided at the tip of the auger rod, and a stirring blade is provided at the upper stage of the auger rod. Anti-rotation blades are provided, and the excavation blade and stirring blade are each pivoted to a support member fixed to the auger rod, and the anti-rotation blade is rotatably attached to the auger rod via the support member. At the same time, the auger is mounted on the support member by a pivot, and the digging blade, stirring blade, and co-rotation prevention blade are each held in an expanded state by the support member by the pivot and shear pin, and the auger is prepared on the ground. , a step of inserting the auger rod into the steel pipe shaft with the excavation blade, stirring blade, and co-rotation prevention blade leading from the bottom end of the steel pipe pile with external ribs prepared separately, and inserting the auger rod and the top end of the steel pipe pile. A process in which the auger and steel pipe pile are each gripped by a working machine and rotated, while at the same time a slurry-like solidified material is discharged from the tip of the auger and fed to a shallow ground depth by the distance of the foot hardening section at the bottom of the drilled hole. Next, the injection of the solidifying material is changed to a slurry-like solidifying material that has a higher compressive strength after hardening than the previously injected solidifying material, and the solidifying material is injected by the distance of the foot hardening section while cutting to a predetermined depth. a step of drilling a hole; next, with the steel pipe pile fixed, the auger shaft is pulled up to shear the shear pin; a co-rotation prevention blade, a stirring blade and a drilling blade are contracted and closed in the steel pipe mine; A method for constructing an anchor foundation pile, comprising the steps of inserting a steel pipe pile into the foot protection part while rotating it, and then pulling up the auger; This is a method for constructing an anchor foundation pile, characterized in that at least one ring-shaped protrusion is fixed to the lower part to improve adhesion to the solidifying material.
［作 用］
掘削翼の上段には掘削径より大きな径の共回り防止翼が
オーガーロッドに対して回転自在に装着されているので
掘削翼で掘削されて生じた土塊は静止した共回り防止翼
に当って破砕される。[Function] A co-rotation prevention blade with a diameter larger than the excavation diameter is attached to the upper stage of the excavation blade so that it can rotate freely with respect to the auger rod, so the soil mass excavated by the excavation blade is removed by the stationary co-rotation prevention blade. It will be crushed by hitting it.
また、地盤を掘削・攪拌しつつ固化材を注入し、同時に
鋼管を押し込むので、固化材が固化しない内に鋼管が沈
設される。Furthermore, the solidifying material is injected while the ground is being excavated and stirred, and the steel pipe is pushed in at the same time, so the steel pipe is deposited before the solidifying material has solidified.
鋼管杭の外周面にはリブが設けてあり、孔の内壁との間
には固化材と土壌の固化物が充填されているので、鋼管
杭は引き抜き、押し込みに対し摩擦抵抗力が大である。Steel pipe piles have ribs on their outer circumferential surface, and the space between them and the inner wall of the hole is filled with solidified material and solidified soil, so steel pipe piles have high frictional resistance when pulled out or pushed in. .
さらに、鋼管杭の下端内周面に設けられたリング状の突
起は鋼管内の前記固化物と鋼管との付着力を増大させる
。Furthermore, the ring-shaped protrusion provided on the inner circumferential surface of the lower end of the steel pipe pile increases the adhesive force between the solidified material inside the steel pipe and the steel pipe.
［実施例コ
以下添付図に基づいて本発明の一実施例を詳細に説明す
る。[Example 1] An example of the present invention will be described in detail below based on the attached drawings.
第１図〜第６図は本発明のアンカー基礎杭の造成方法の
施工順序を示す図、第７図は本発明の施工に使用するオ
ーガーの正面図である。1 to 6 are diagrams showing the construction order of the anchor foundation pile construction method of the present invention, and FIG. 7 is a front view of an auger used in the construction of the present invention.
第７図において、１はオーガーでこのオーガー１はオー
ガー軸２１と、この途中に遊嵌されたスタビライザ２２
と、軸先端に装着された掘削翼２３と、この上段に支持
部材２４ｃを介して固着された攪拌翼２４と、さらにこ
の上段に支持部材３Ｃを介して回転自在に遊嵌された共
回り防止翼３とから構成されている。In FIG. 7, 1 is an auger, and this auger 1 has an auger shaft 21 and a stabilizer 22 loosely fitted in the middle of the auger shaft 21.
, the excavating blade 23 attached to the tip of the shaft, the stirring blade 24 fixed to this upper stage via a support member 24c, and the co-rotation prevention blade rotatably fitted loosely to this upper stage via a support member 3C. It is composed of wings 3.
掘削翼２３にはビット２３ａが固着され、攪拌翼２４の
外径は掘削翼２３の外径と路間−である。A bit 23a is fixed to the excavating blade 23, and the outer diameter of the agitating blade 24 is equal to the outer diameter of the excavating blade 23 and the distance between the tracks.
共回り防止翼３の外径は掘削翼２３より大径に形成され
、掘削中は掘削翼２３で掘削された削孔壁から外側の原
地盤中に食い込むので、掘削翼２”３と攪拌翼２４とが
回転しても共回り防止翼３は回転しないようになってい
る。The outer diameter of the co-rotation prevention blade 3 is formed to be larger than that of the excavation blade 23, and during excavation, it bites into the original ground outside from the borehole wall excavated by the excavation blade 23, so that the excavation blade 2"3 and the stirring blade 24 rotates, the co-rotation prevention blade 3 does not rotate.
第７図では攪拌翼２４の上段に共回り防止翼３が設けら
れているが、攪拌翼２４と共回り防止翼３の位置を入れ
替えても良い。In FIG. 7, the co-rotation prevention blade 3 is provided at the upper stage of the stirring blade 24, but the positions of the stirring blade 24 and the co-rotation prevention blade 3 may be interchanged.
前記共回り防止翼は、掘削翼２３で掘削されて生じた大
きな土塊を破砕するもので、掘削翼２３や攪拌翼２４と
共に回転している大きな土塊が回転していない共回り防
止翼に当り、掘削翼２３や攪拌翼２４との間で剪断され
て破砕され、固化材と地盤との均一な混線を可能にする
。The co-rotation prevention blade is for crushing a large lump of soil that is excavated by the excavation blade 23, and the large clod that is rotating together with the excavation blade 23 and stirring blade 24 hits the non-rotating co-rotation prevention blade, It is sheared and crushed between the excavation blades 23 and stirring blades 24, allowing uniform mixing of the solidified material and the ground.
２３ｂ、２４ａ、３ａは、それぞれ掘削翼２３、攪拌翼
２４．共回り防止翼３を枢支するボルトで、支持部材２
３ｄ、２４ｃ、３ｃに枢着されている。23b, 24a, and 3a are the digging blade 23 and the stirring blade 24. The support member 2 is a bolt that pivotally supports the co-rotation prevention wing 3.
It is pivotally connected to 3d, 24c, and 3c.
前記掘削翼２３．攪拌翼２４及び共回り防止翼３は前記
ボルト２３ｂ、２４ａ、３ａで下方向回動自在に枢支さ
れると共に５シャーピン２３Ｃ１２４ｂ、３ｂで下方向
に回動じないように規制されている。Said digging wing 23. The stirring blade 24 and the co-rotation prevention blade 3 are pivotally supported by the bolts 23b, 24a, and 3a so as to be freely rotatable downward, and are restricted from rotating downward by five shear pins 23C124b and 3b.
２２はスタビライザでオーガーロッド２１の途中に複数
組遊嵌されており、挿通すべき鋼管杭（第１図〜第６図
の符号４）の内側に摺接するようになっている。スタビ
ライザ２２は掘削中の鋼管杭の芯振れを防止すると共に
オーガロッド２１の屈曲を防止するものである。A plurality of stabilizers 22 are loosely fitted in the middle of the auger rod 21, and are adapted to come into sliding contact with the inside of a steel pipe pile (reference numeral 4 in FIGS. 1 to 6) to be inserted. The stabilizer 22 prevents the steel pipe pile from swinging out during excavation and also prevents the auger rod 21 from bending.
２５はセメントミルク等の固化材の吐出口である。25 is a discharge port for solidifying material such as cement milk.
以下に、施工順序について説明する。The construction order will be explained below.
先ず、地上で第１図で示すように拡開状態のオーガー１
を鋼管杭４にセットする。First, the auger 1 is opened on the ground as shown in Figure 1.
Set it on the steel pipe pile 4.
鋼管杭４は外周面リブ付のスパイラル鋼管で下端の内周
には丸棒のリングが２本（１本以上あれば良い）溶接さ
れて突起４ａ、４ａを形成しており掘削翼２３．攪拌翼
２４及び共回り防止翼３を鋼管杭４下端から先行させた
状態でオーガーロッド２１が鋼管杭４内に挿通される。The steel pipe pile 4 is a spiral steel pipe with ribs on the outer circumferential surface, and two round bar rings (one or more is sufficient) are welded to the inner periphery of the lower end to form protrusions 4a, 4a, and the excavation wings 23. The auger rod 21 is inserted into the steel pipe pile 4 with the stirring blade 24 and the co-rotation prevention blade 3 leading from the lower end of the steel pipe pile 4.
次に、図示しない作業機でオーガーロッド２１と鋼管杭
４のそれぞれの上端を把持し、第２図に示すようにオー
ガー１と鋼管杭４をそれぞれ互に逆方向または同一方向
に回転させつつ、同時にオーガーロッド２１先端の吐出
口２５からスラリー状の固化材を吐出し、地盤中を掘削
翼２３で削孔する。Next, the upper ends of the auger rod 21 and the steel pipe pile 4 are held by a working machine (not shown), and as shown in FIG. 2, while rotating the auger 1 and the steel pipe pile 4 in opposite directions or in the same direction, At the same time, a solidified material in the form of slurry is discharged from the discharge port 25 at the tip of the auger rod 21, and a hole is drilled in the ground with the drilling blade 23.
掘削翼２３で掘削された地盤の土塊は共回り防止翼３で
破砕され、攪拌翼２４で攪拌されつつ、吐出口２５から
吐出する固化材と混合される。The soil clod excavated by the excavation blades 23 is crushed by the co-rotation prevention blades 3, and is mixed with the solidification material discharged from the discharge port 25 while being stirred by the stirring blades 24.
第２図に示すように鋼管杭４の１本分が給進されたら、
次に第３図に示すように鋼管杭４及びオーガーロッド２
１をそれぞれ１本縫足す。When one steel pipe pile 4 is fed as shown in Figure 2,
Next, as shown in Fig. 3, the steel pipe pile 4 and the auger rod 2
Add one stitch each.
次に、第４図に示すように継足した１本分を固化材を注
入しつつ削孔し、図示しないが引続き鋼管杭４を順次継
足して所定深度まで固化材を注入しつつ削孔する。Next, as shown in Fig. 4, a hole is drilled for the added one pile while injecting solidifying material, and although not shown, the steel pipe piles 4 are successively added and the hole is drilled while injecting solidifying material to a predetermined depth. do.
所定深度まで掘削翼２３先端が到達した時点でオーガー
ロッド２１と鋼管杭４の給進を停止し、固化後の圧縮強
度がそれまで注入した固化材より大きいスラリー状固化
材に切り替えて削孔底部５をその固化材で充満して根固
め部５を形成する。When the tip of the drilling blade 23 reaches a predetermined depth, the feeding of the auger rod 21 and the steel pipe pile 4 is stopped, and the solidified material is switched to a slurry solidified material whose compressive strength after solidification is higher than that of the solidified material injected up to that point, and the bottom of the drilled hole is poured. 5 is filled with the solidifying material to form the root hardening section 5.
この場合オーガー１は給進しないが回転させた方が良い
。この工程を根固め工程と称す。In this case, auger 1 is not fed, but it is better to rotate it. This process is called the root hardening process.
前記根固め工程の代わりに、第４図に示された所定深度
よりも削孔底部の根固め部５の距離だけ浅い地盤の深度
まで削孔した後、それまで注入した固化材よりも固化後
の圧縮強度が大きな固化材に切り替え、前記削孔底部の
根固め部５の距離だけ固化材を注入しつつ所定深度まで
削孔することもできる。Instead of the above-mentioned foot hardening process, after drilling the hole to a depth of the ground that is shallower than the predetermined depth shown in FIG. It is also possible to switch to a solidifying material with a high compressive strength and drill the hole to a predetermined depth while injecting the solidifying material by the distance of the hardening section 5 at the bottom of the hole.
なお、この場合、所定深度よりも削孔底部の根固め部５
の距離だけ浅い地盤の深度まで削孔した後、それまで注
入した固化材よりも固化後の圧縮強度が大きな固化材に
切り替え、オーガー１を削孔底部の根固め部の距離（以
下根固め距離と称す）だけ固化材を注入しつつ回転・給
進して所定深度まで到達し、次に固化材は注入せずオー
ガーロッド２１を回転させつつ根固め距離だけオーガー
ロッド２１を上下させて再攪拌を行うこともできる。In addition, in this case, the root hardening part 5 at the bottom of the drilled hole is lower than the predetermined depth.
After drilling a hole to a shallow ground depth by a distance of The auger rod 21 is rotated and the auger rod 21 is rotated without injecting the solidification material (referred to as ``3''), and then the auger rod 21 is moved up and down by the distance of the root hardening, and the agitation is re-stirred. You can also do
次に、第５図に示すように鋼管杭４を反力にして（ｍ管
杭４上端にかぶせた図示しない作業機のキャップを油圧
ジヤツキで矢印６方向に押えて鋼管杭４が上昇しないよ
うにして）オーガーロッド２１を引揚げる。この場合、
共回り防止翼３．攪拌翼２４．掘削翼２３が順次鋼管杭
４の下端に当ってシャーピン３ｂ、２４ｂ、２３ｃが順
次剪断されるので、共回り防止翼３．攪拌翼２４及び掘
削翼２３は下方に折り畳まれて鋼管杭４内を上昇する。Next, as shown in Fig. 5, the steel pipe pile 4 is used as a reaction force (m). ) Pull up the auger rod 21. in this case,
Co-rotation prevention wing 3. Stirring blade 24. Since the excavating blades 23 successively hit the lower ends of the steel pipe piles 4 and the shear pins 3b, 24b, and 23c are sequentially sheared, the co-rotation prevention blades 3. The stirring blades 24 and the digging blades 23 are folded downward and ascend within the steel pipe pile 4.
この場合、鋼管杭４下端内面の突起４ａ（この実施例の
場合は丸棒２本）に折り畳まれた共回り防止翼３．攪拌
翼２４及び掘削翼２３は当らないような寸法に形成され
ている。In this case, co-rotation prevention wings 3. The stirring blades 24 and the excavating blades 23 are dimensioned so that they do not touch each other.
次に、第６図に示すように鋼管杭４を回転させながら給
進し、固化後の圧縮強度が大きな固化材が注入された根
固め部５内に挿入する。Next, as shown in FIG. 6, the steel pipe pile 4 is rotated and advanced, and inserted into the foot protection part 5 into which a solidification material having a high compressive strength after solidification is injected.
次にオーガー１を地上へ引き揚げる。Next, lift Auger 1 to the ground.
なお、第５図に示すように、共回り防止翼３゜攪拌翼２
４及び掘削翼２３を縮閉した後、引続きオーガー１を地
上に引き揚げ、次に第６図に示すように鋼管杭４を削孔
底へ沈設しても良い。In addition, as shown in FIG. 5, the co-rotation prevention blade 3
After contracting and closing the auger 4 and the excavation blades 23, the auger 1 may be subsequently raised to the ground, and then the steel pipe pile 4 may be sunk to the bottom of the excavation hole as shown in FIG.
［発明の効果］
本発明のアンカー基礎杭の造成方法は下記のような効果
を奏する。[Effects of the Invention] The anchor foundation pile construction method of the present invention has the following effects.
■掘削土を積極的に排出せず、削孔内を固化材と地盤と
の混合物で満たすため、原地盤を乱したり、弛めたする
ことがない。したがって、１本の杭に極めて大きな鉛直
支持力と引き抜き抵抗力が発生する
■芯材として鋼管を使用するので上部工との接続が確実
である。■Since excavated soil is not actively discharged and the inside of the borehole is filled with a mixture of solidification material and ground, the original ground is not disturbed or loosened. Therefore, a single pile generates an extremely large vertical support force and pull-out resistance force. ■Since a steel pipe is used as the core material, the connection with the superstructure is reliable.
■泥土、残土の発生量が非常に少ない。■The amount of mud and residual soil generated is extremely small.
従って、地震時に基礎杭に大きな押し込み力と引き抜き
力が交互に作用しても耐えることができ、かつ上部工と
確実に応力伝達ができるので構造物の大型化、高層化に
適応することができる。Therefore, it can withstand even if large pushing and pulling forces are applied alternately to the foundation pile during an earthquake, and since stress can be reliably transmitted to the superstructure, it can be adapted to larger and higher-rise structures. .
第１図〜第６図は本発明のアンカー基礎杭の造成方法の
施工順序を示す図、第７図は本発明の施工に使用するオ
ーガーの正面図である。
■・・・オーガー、２１・・・オーガーロッド、２２・
・・スタビライザ、２３・・・掘削翼、２４・・・攪拌
翼、
２３ｄ、２４ｃ、３ｃｍ支持部材、
２５・・・吐出口、３・・・共回り防止翼、４・・・鋼
管杭、４ａ・・・突起、５・・・根固め部、６・・・矢
印。1 to 6 are diagrams showing the construction order of the anchor foundation pile construction method of the present invention, and FIG. 7 is a front view of an auger used in the construction of the present invention. ■... Auger, 21... Auger rod, 22...
... Stabilizer, 23... Excavation blade, 24... Stirring blade, 23d, 24c, 3cm support member, 25... Discharge port, 3... Co-rotation prevention blade, 4... Steel pipe pile, 4a ...Protrusion, 5... Root hardening part, 6... Arrow.
Claims (1)
個のスタビライザが回転自在に遊嵌され、前記オーガー
ロッドの先端に掘削翼が、その上段に攪拌翼及び共回り
防止翼が配設され、前記掘削翼と攪拌翼とはそれぞれオ
ーガーロッドに固着された支持部材に枢軸により枢着さ
れ、前記共回り防止翼は支持部材を介してオーガーロッ
ドに回転自在に遊嵌されると共に、支持部材に枢軸によ
り枢着され、前記掘削翼、攪拌翼及び共回り防止翼はそ
れぞれ支持部材に枢軸とシャーピンにより拡開状態に保
持されており、前記オーガーを地上で準備し、別途に準
備した外周面リブ付きの鋼管杭下端より前記掘削翼、攪
拌翼及び共回り防止翼を先行させた状態でオーガーロッ
ドを前記鋼管坑内に挿入する工程 （Ｂ）オーガーロッドと鋼管杭上端をそれぞれ作業機に
把持させ、オーガーと鋼管杭をそれぞれ回転させつつ、
同時にオーガー先端からスラリー状の固化材を吐出し、
地盤の所定深度まで給進する工程 （Ｃ）次に、オーガーロッドと鋼管杭の給進を停止し、
固化材の注入を、それまでに注入した固化材よりも固化
後の圧縮強度が大きなスラリー状固化材に切り替え削孔
底部の根固め部をその固化材で充満する工程 （Ｄ）次に、鋼管抗を固定した状態でオーガー軸を引揚
げて前記シャーピンを剪断し、共回り防止翼、攪拌翼及
び掘削翼を鋼管坑内に縮閉する工程 （Ｅ）次に、鋼管杭を回転させながら前記根固め部内に
挿入する工程 （Ｆ）その後、前記オーガーを引揚げる工程（２）下記
工程より成るアンカー基礎杭の造成方法。 （Ａ）オーガーはオーガーロッドの途中に少なくとも１
個のスタビライザが回転自在に遊嵌され、前記オーガー
ロッドの先端に掘削翼が、その上段に攪拌翼及び共回り
防止翼が配設され、前記掘削翼と攪拌翼とはそれぞれオ
ーガーロッドに固着された支持部材に枢軸により枢着さ
れ、前記共回り防止翼は支持部材を介してオーガーロッ
ドに回転自在に遊嵌されると共に、支持部材に枢軸によ
り枢着され、前記掘削翼、攪拌翼及び共回り防止翼はそ
れぞれ支持部材に枢軸とシャーピンにより拡開状態に保
持されており、前記オーガーを地上で準備し、別途に準
備した外周面リブ付きの鋼管杭下端より前記掘削翼、攪
拌翼及び共回り防止翼を先行させた状態でオーガーロッ
ドを前記鋼管坑内に挿入する工程 （Ｂ）オーガーロッドと鋼管杭上端をそれぞれ作業機に
把持させ、オーガーと鋼管杭をそれぞれ回転させつつ、
同時にオーガー先端からスラリー状の固化材を吐出し、
削孔底部の根固め部の距離だけ浅い地盤の深度まで給進
する工程（Ｃ）次に、固化材の注入を、それまでに注入
した固化材よりも固化後の圧縮強度が大きなスラリー状
固化材に切り替え、前記根固め部の距離だけ固化材を注
入しつつ所定深度まで削孔する工程 （Ｄ）次に、鋼管杭を固定した状態でオーガー軸を引揚
げて前記シャーピンを剪断し、共回り防止翼、攪拌翼及
び掘削翼を鋼管坑内に縮閉する工程 （Ｅ）次に、鋼管杭を回転させながら前記根固め部内に
挿入する工程 （Ｆ）その後、前記オーガーを引揚げる工程（３）前記
鋼管杭にはその内周面の下部に固化材との付着力向上の
ための少なくとも１個以上のリング状の突起が固設され
ていることを特徴とする請求項（１）または請求項（２
）に記載のアンカー基礎杭の造成方法。(1) A method for constructing anchor foundation piles consisting of the following steps. (A) There should be at least one auger in the middle of the auger rod.
A number of stabilizers are rotatably fitted loosely into the auger rod, and a digging blade is provided at the tip of the auger rod, and a stirring blade and a co-rotation prevention blade are provided on the upper stage thereof, and the digging blade and the stirring blade are each fixed to the auger rod. The co-rotation prevention blade is rotatably fitted loosely to the auger rod via the support member, and is pivotally connected to the support member by a pivot, and the co-rotation prevention blade is rotatably fitted to the auger rod via the support member, and the co-rotation prevention blade is rotatably fitted to the auger rod via the support member. The anti-rotation blades are each held in an expanded state by a support member with a pivot and a shear pin, and the auger is prepared on the ground, and the excavation blade, stirring blade and common Step (B) of inserting the auger rod into the steel pipe mine with the anti-rotation wing in advance; (B) the auger rod and the upper end of the steel pipe pile are each held by a working machine, and while rotating the auger and the steel pipe pile, respectively;
At the same time, a slurry solidified material is discharged from the auger tip,
Step of feeding to a predetermined depth in the ground (C) Next, stop feeding the auger rod and steel pipe pile,
Step (D) of changing the injection of solidification material to a slurry solidification material that has a higher compressive strength after solidification than the solidification material injected up to that point and filling the hardening section at the bottom of the drilled hole with the solidification material (D) Next, the steel pipe is Step (E) of pulling up the auger shaft with the shaft fixed, shearing the shear pin, and contracting and closing the co-rotation prevention blade, stirring blade, and excavation blade in the steel pipe mine (E) Next, while rotating the steel pipe pile, the shear pin is sheared. A method for constructing an anchor foundation pile comprising the following steps: (F) inserting the auger into the solidified portion; and (2) lifting the auger. (A) There should be at least one auger in the middle of the auger rod.
A number of stabilizers are rotatably fitted loosely into the auger rod, and a digging blade is provided at the tip of the auger rod, and a stirring blade and a co-rotation prevention blade are provided on the upper stage thereof, and the digging blade and the stirring blade are each fixed to the auger rod. The co-rotation prevention blade is rotatably fitted loosely to the auger rod via the support member, and is pivotally connected to the support member by a pivot, and the co-rotation prevention blade is rotatably fitted to the auger rod via the support member, and the co-rotation prevention blade is rotatably fitted to the auger rod via the support member. The anti-rotation blades are each held in an expanded state by a support member with a pivot and a shear pin, and the auger is prepared on the ground, and the excavation blade, stirring blade and common Step (B) of inserting the auger rod into the steel pipe mine with the anti-rotation wing in advance; (B) the auger rod and the upper end of the steel pipe pile are each held by a working machine, and while rotating the auger and the steel pipe pile, respectively;
At the same time, a slurry solidified material is discharged from the auger tip,
(C) Next, the solidification material is injected into a slurry form that has a higher compressive strength after solidification than the solidification material injected so far. (D) Next, with the steel pipe pile fixed, the auger shaft is pulled up and the shear pin is sheared, and the shear pin is sheared with the steel pipe pile fixed. Step (E) of contracting and closing the anti-rotation blades, stirring blades, and excavation blades into the steel pipe mine (F) Next, the step (F) of inserting the steel pipe pile into the foot protection section while rotating (F) The step of lifting the auger (3) ) Claim (1) or claim 1, wherein the steel pipe pile has at least one ring-shaped projection fixed to the lower part of the inner circumferential surface thereof to improve adhesion to the solidifying material. term (2
) method for constructing anchor foundation piles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2340212A JPH0781270B2 (en) | 1990-11-30 | 1990-11-30 | Anchor foundation pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2340212A JPH0781270B2 (en) | 1990-11-30 | 1990-11-30 | Anchor foundation pile construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04209206A true JPH04209206A (en) | 1992-07-30 |
| JPH0781270B2 JPH0781270B2 (en) | 1995-08-30 |
Family
ID=18334772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2340212A Expired - Fee Related JPH0781270B2 (en) | 1990-11-30 | 1990-11-30 | Anchor foundation pile construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0781270B2 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829374A (en) * | 1981-08-13 | 1983-02-21 | Takashi Take | Reducing method for higher harmonic of six-phase rectifier |
| JPS58185826A (en) * | 1982-04-23 | 1983-10-29 | Tenotsukusu:Kk | Construction of foundation pile |
| JPS6130090A (en) * | 1984-07-20 | 1986-02-12 | Nec Corp | Semiconductor laser |
| JPS6346545U (en) * | 1986-09-16 | 1988-03-29 | ||
| JPS6448926A (en) * | 1987-08-17 | 1989-02-23 | Nippon Kokan Kk | Construction of pile |
| JPH02140323A (en) * | 1988-11-19 | 1990-05-30 | Nippon Steel Corp | Formation of soil cement synthetic pile |
-
1990
- 1990-11-30 JP JP2340212A patent/JPH0781270B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829374A (en) * | 1981-08-13 | 1983-02-21 | Takashi Take | Reducing method for higher harmonic of six-phase rectifier |
| JPS58185826A (en) * | 1982-04-23 | 1983-10-29 | Tenotsukusu:Kk | Construction of foundation pile |
| JPS6130090A (en) * | 1984-07-20 | 1986-02-12 | Nec Corp | Semiconductor laser |
| JPS6346545U (en) * | 1986-09-16 | 1988-03-29 | ||
| JPS6448926A (en) * | 1987-08-17 | 1989-02-23 | Nippon Kokan Kk | Construction of pile |
| JPH02140323A (en) * | 1988-11-19 | 1990-05-30 | Nippon Steel Corp | Formation of soil cement synthetic pile |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0781270B2 (en) | 1995-08-30 |
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