JP2000248867A - Method and apparatus for manufacturing dry pillar body for base ground - Google Patents
Method and apparatus for manufacturing dry pillar body for base groundInfo
- Publication number
- JP2000248867A JP2000248867A JP11055294A JP5529499A JP2000248867A JP 2000248867 A JP2000248867 A JP 2000248867A JP 11055294 A JP11055294 A JP 11055294A JP 5529499 A JP5529499 A JP 5529499A JP 2000248867 A JP2000248867 A JP 2000248867A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- auger
- ground
- diameter
- excavator
- 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
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Foundations (AREA)
- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建造物の基礎地盤
の乾式柱状体の製造方法及び製造装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a dry columnar body on the foundation ground of a building.
【０００２】[0002]
【従来の技術】従来の乾式柱状体は円柱形状であり、土
壌と柱状体の表面との摩擦力や柱状体の下端を岩盤層に
当接させて建造物の荷重を支持していた。岩盤層が、地
表から数メートル程度の比較的浅いところにあれば柱状
体の下端を岩盤層に当接させることができるので問題は
ないが、地中のかなり深いところまで掘り下げないと岩
盤層に到達しないような場所においては、土壌と柱状体
との摩擦力のみで建造物の荷重を支持しなければならな
い。2. Description of the Related Art A conventional dry columnar body has a columnar shape, and a load of a building is supported by bringing a frictional force between soil and the surface of the columnar body and a lower end of the columnar body into contact with a bedrock layer. If the bedrock layer is relatively shallow, about a few meters from the surface of the ground, there is no problem because the lower end of the columnar body can be brought into contact with the bedrock layer. In places where it cannot be reached, the load of the building must be supported only by the frictional force between the soil and the column.
【０００３】[0003]
【発明が解決しようとする課題】柱状体に環状の突起を
形成し、柱状体と地中の土との摩擦力を大きくすること
により、柱状体の下端が岩盤層に到達していなくても建
造物の荷重をより支持し易くする乾式柱状体の製造方法
及び製造装置を提供することを目的としている。By forming an annular protrusion on the columnar body and increasing the frictional force between the columnar body and the underground soil, even if the lower end of the columnar body does not reach the bedrock layer. An object of the present invention is to provide a manufacturing method and a manufacturing apparatus of a dry columnar body that can more easily support a load of a building.
【０００４】[0004]
【課題を解決するための手段】請求項１の発明は、下向
きの掘削オーガを備えた掘削機で地表から地中に穴を掘
り、前記掘削オーガヘッドの先端に前記穴の径を押し広
げる穴径拡大板を備えた拡大機を装着し、拡大機を装着
した前記掘削オーガを前記穴の中へ所定深さまで下降さ
せて停止し、穴の内壁を前記穴径拡大板で押圧すること
により穴径を拡大し、穴径を拡大した後穴径拡大板を元
の状態に収納し、掘削オーガを上昇させて拡大機を穴か
ら出し、掘削オーガヘッドの先端から拡大機を取外し、
前記穴に排土と固化材を充填し又は充填しながら掘削オ
ーガを正転駆動と逆転駆動を繰り返しながら穴内に挿入
して排土と固化材を攪拌及び転圧することを特徴とする
基礎地盤の乾式柱状体製造方法である。According to a first aspect of the present invention, there is provided a drilling machine equipped with a downwardly directed drilling auger for digging a hole from the ground surface into the ground, and for expanding the diameter of the hole at the tip of the drilling auger head. The drilling auger equipped with a magnifying machine is mounted, the excavation auger equipped with the magnifying machine is lowered into the hole to a predetermined depth and stopped, and the inner wall of the hole is pressed by the hole diameter magnifying plate. After expanding the diameter, expanding the hole diameter, storing the hole diameter expansion plate in the original state, raising the drilling auger, taking out the expander from the hole, removing the expander from the tip of the drilling auger head,
Filling the hole with the earth removal and solidification material or inserting the excavation auger into the hole while repeating the normal rotation drive and the reverse rotation drive while filling and stirring and compacting the earth removal and the solidification material, This is a dry columnar body manufacturing method.
【０００５】請求項２の発明は、地表及び所定深さの穴
径を拡大機で拡大する請求項１に記載の基礎地盤の乾式
柱状体製造方法である。According to a second aspect of the present invention, there is provided the method of manufacturing a dry columnar body for a foundation ground according to the first aspect, wherein a hole diameter at the ground surface and a predetermined depth is enlarged by an enlarger.
【０００６】請求項３の発明は、掘削機で地表から地中
に穴を掘り、掘削オーガを穴から引き上げる前に穴に固
化材を入れてオーガを固定しつつ穴の内壁を補強し、穴
の内壁を補強した後に掘削オーガを穴から引き上げる請
求項１及び請求項２に記載の基礎地盤の乾式柱状体製造
方法である。According to a third aspect of the present invention, an excavator digs a hole from the ground surface into the ground, and before solidifying the auger, raises the inner wall of the hole while fixing the auger before lifting the drilling auger from the hole. The method according to claim 1 or 2, wherein the drilling auger is lifted from the hole after reinforcing the inner wall of the base.
【０００７】請求項４の発明は、半径方向外方へ張り出
す穴径拡大板を備えた拡大機を掘削機の掘削オーガの先
端に着脱可能に設けたことを特徴とする基礎地盤の乾式
柱状体製造装置である。According to a fourth aspect of the present invention, there is provided a dry columnar foundation ground, wherein an expander having a hole diameter expanding plate projecting outward in the radial direction is detachably provided at a tip of a drilling auger of an excavator. It is a body manufacturing device.
【０００８】[0008]
【発明の実施の形態】図１〜図４は、建造物（例えば木
造住宅）の荷重を支持する基礎地盤用の柱状体の製造工
程の一部を示している。下向きの掘削オーガ（掘削ドリ
ル）１を備えた掘削機２が地面に固定された支柱３に沿
って上下に移動可能となっている。掘削オーガ１を正転
させながら掘削機２を下降させると掘削機２は地中を掘
り進み、地表から地中に穴４をあけることができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 4 show a part of a manufacturing process of a pillar for a foundation ground for supporting a load of a building (for example, a wooden house). An excavator 2 provided with a downward excavation auger (excavation drill) 1 can move up and down along a column 3 fixed to the ground. When the excavator 2 is lowered while the excavator auger 1 is rotated forward, the excavator 2 digs in the ground and can make a hole 4 from the ground surface into the ground.
【０００９】穴４を掘った際に土が排出され、この土が
地表に掘り出されて排土５となっている。穴４が必要な
所定の深さ（例えば深さ５ｍ）まで達すると、正転駆動
と逆転駆動を繰り返し、さらにオーガ１を上下させなが
らセメント系固化材６を穴４の中に入れて穴４の内壁に
付着させ、穴４の内壁が崩れないように補強する。[0009] When the hole 4 is dug, soil is discharged, and the soil is dug out on the surface of the earth to form a discharge 5. When the hole 4 reaches a required depth (for example, a depth of 5 m), the normal rotation drive and the reverse rotation drive are repeated, and the cement-based solidifying material 6 is inserted into the hole 4 while the auger 1 is moved up and down. And reinforced so that the inner wall of the hole 4 does not collapse.
【００１０】穴４の内壁が補強されると、図２に示すよ
うに掘削機２を支柱３に沿って上昇させ掘削オーガ１を
穴４から出す。次に掘削オーガ１の下端に拡大機７を取
付ける。図５に示すように拡大機７の上端にはブラケッ
ト１１が設けてあり、このブラケット１１と掘削オーガ
１の破線で示す刃とをピン１０で貫通させて掘削オーガ
１と拡大機７を連結している。When the inner wall of the hole 4 is reinforced, the excavator 2 is raised along the column 3 as shown in FIG. Next, the magnifier 7 is attached to the lower end of the excavator auger 1. As shown in FIG. 5, a bracket 11 is provided at the upper end of the magnifier 7, and the bracket 11 and the blade indicated by the broken line of the excavator auger 1 are penetrated by the pin 10 to connect the excavator auger 1 and the magnifier 7. ing.
【００１１】図５に示すように、拡大機７は上下方向に
駆動される油圧シリンダ８を備えている。油圧シリンダ
８には耐圧配管１４が接続されている。耐圧配管１４を
介して圧油を油圧シリンダ８へ供給し、油圧シリンダ８
内のロッド８ａを下方へ押し下げる。As shown in FIG. 5, the magnifier 7 has a hydraulic cylinder 8 which is driven vertically. A pressure-resistant pipe 14 is connected to the hydraulic cylinder 8. The hydraulic oil is supplied to the hydraulic cylinder 8 through the pressure
The inner rod 8a is pushed down.
【００１２】ロッド８ａの下端にはフランジ１５が固着
されている。図５のVII−VII矢視図である図７に示すよ
うに、フランジ１５は四方へ放射状に延びる支持部１５
ｂを備えている。一対のアーム１２が各支持部１５ｂを
挟んで配置されている。ピン１５ａが支持部１５ｂと一
対のアーム１２の上端を貫通しており、ピン１５ａは一
対のアーム１２を支持部１５ｂに対して回動可能に連結
している。A flange 15 is fixed to the lower end of the rod 8a. As shown in FIG. 7, which is a view taken in the direction of arrows VII-VII in FIG. 5, the flange 15 is provided with support portions 15 extending radially in four directions.
b. A pair of arms 12 are arranged with each support 15b interposed therebetween. A pin 15a penetrates the support portion 15b and the upper end of the pair of arms 12, and the pin 15a rotatably connects the pair of arms 12 to the support portion 15b.
【００１３】図５及び図７に示すように、一対のアーム
１２の下端の間には、アーム１７の上端が配置されてい
る。また、一対のアーム１２の下端の外側には一対のフ
ランジ１６が配置されている。これらフランジ１６、ア
ーム１２及びアーム１７をピン１６ａが貫通しており、
アーム１２及びアーム１７は、ピン１６ａを中心に回動
可能となっている。As shown in FIGS. 5 and 7, between the lower ends of a pair of arms 12, an upper end of an arm 17 is disposed. A pair of flanges 16 are arranged outside the lower ends of the pair of arms 12. Pin 16a penetrates these flange 16, arm 12, and arm 17,
The arm 12 and the arm 17 are rotatable around a pin 16a.
【００１４】フランジ１６には、穴４の内壁を押圧する
拡大板１３が固着されている。図５に示すように、拡大
板１３の上部と油圧シリンダ８の下端は、拡大機７の全
周に渡って防土布１８が設けてある。An enlarged plate 13 for pressing the inner wall of the hole 4 is fixed to the flange 16. As shown in FIG. 5, an earthproof cloth 18 is provided over the entire circumference of the magnifying machine 7 at the upper part of the magnifying plate 13 and the lower end of the hydraulic cylinder 8.
【００１５】図５に示すように、アーム１７の下端はピ
ン１９ａでフランジ１９に回動可能に連結されている。
フランジ１９は、上又は下から見て十字形をしており、
図７に示す４つのアーム１７をそれぞれピン１９ａで回
動可能に連結している。As shown in FIG. 5, the lower end of the arm 17 is rotatably connected to the flange 19 by a pin 19a.
The flange 19 has a cross shape when viewed from above or below,
The four arms 17 shown in FIG. 7 are rotatably connected by pins 19a, respectively.
【００１６】２つのピン１５ａの間隔が、２つのピン１
６ａの間隔よりも小さくなるように、アーム１２には拡
大板１３に当接する突起１２ａ（図５、図６、図８）が
設けてある。フランジ１５が押し下げられるとアーム１
２は拡大板１３を穴４の半径方向外方へ押し出す向きに
回動する。また、２つのピン１６ａの間隔は、２つのピ
ン１９ａの間隔よりも広く設定されており、フランジ１
５が押し下げられるとアーム１７は、拡大板１３を穴４
の半径方向外方へ押し出す向きに回動する。When the distance between the two pins 15a is two pins 1
The arm 12 is provided with a projection 12a (FIGS. 5, 6, and 8) that comes into contact with the magnifying plate 13 so as to be smaller than the interval of 6a. When the flange 15 is pushed down, the arm 1
Numeral 2 rotates in a direction to push the expanding plate 13 outward in the radial direction of the hole 4. The distance between the two pins 16a is set wider than the distance between the two pins 19a,
5 is pushed down, the arm 17 inserts the magnifying plate 13 into the hole 4.
In the direction of pushing outward in the radial direction.
【００１７】拡大機７は、収納時は図５に示すように穴
４内に収まる大きさであり、拡大時には図６に示すよう
にパンタグラフ式のアーム１２及びアーム１７が穴４の
半径方向外方へ開き、拡大板１３が穴４の内壁を押圧し
穴４の内径を押し広げる。The magnifier 7 is sized to fit in the hole 4 as shown in FIG. 5 when stored, and the pantograph-type arms 12 and 17 are positioned outside the hole 4 in the radial direction as shown in FIG. Then, the expanding plate 13 presses the inner wall of the hole 4 to expand the inner diameter of the hole 4.
【００１８】拡大機７には油圧シリンダ８が搭載されて
おり、この油圧シリンダ８には掘削機本体より圧油が耐
圧配管１４（図５）を通して供給される。A hydraulic cylinder 8 is mounted on the magnifier 7, and pressure oil is supplied to the hydraulic cylinder 8 from the excavator body through a pressure-resistant pipe 14 (FIG. 5).
【００１９】拡大機７を装着した掘削機２を支柱３に沿
って下降させて穴４の中へ入れ、図３に示すように、穴
４の下端まで拡大機７を下降させた後、油圧シリンダ８
へ圧油を供給し、図６及び図８に示すように拡大板１３
を広げ、図６に示すように拡大板１３で穴４の内壁を押
圧して穴径を広げる。押圧していない部分の穴４の直径
を４００ｍｍとすると、例えば７００ｍｍ程度まで押し
広げるのが好ましい。The excavator 2 equipped with the magnifying machine 7 is lowered along the column 3 into the hole 4, and as shown in FIG. Cylinder 8
And supply the pressurized oil to the expanding plate 13 as shown in FIGS.
Then, as shown in FIG. 6, the inner wall of the hole 4 is pressed by the magnifying plate 13 to increase the hole diameter. Assuming that the diameter of the hole 4 in the portion that is not pressed is 400 mm, it is preferable that the hole 4 be expanded to about 700 mm, for example.
【００２０】また、穴径を押し広げた後に、一旦拡大板
１３を図７に示すように収納して拡大機７を４５度回転
させ、その後さらに拡大板１３を押し出して穴径を押し
広げることにより押し広げた部分の穴４の形状を環状に
近づけてもよい。After expanding the hole diameter, the enlarging plate 13 is temporarily stored as shown in FIG. 7 and the magnifier 7 is rotated by 45 degrees, and then the expanding plate 13 is further extruded to expand the hole diameter. The shape of the hole 4 of the part expanded by pressing may be approximated to an annular shape.
【００２１】穴径を押し広げた後、油圧シリンダ８に供
給していた圧油を耐圧配管１４を介して抜き、ロッド８
ａ及びフランジ１５を上昇させて拡大板１３を半径方向
内方へ移動させ拡大機７を図５に示す元の状態に戻した
後、掘削機２を上昇させ、拡大機７を穴４から取り出
す。この時、さらに拡大機７を穴４の途中で停止させ、
図４に示すように穴４の途中において穴径を押し広げて
もよい。また、地表を含む穴４の最上部において穴径を
広げてもよい。拡大機７を穴４から取り出した後、掘削
オーガ１から拡大機７を取り外す。After the hole diameter is expanded, the pressure oil supplied to the hydraulic cylinder 8 is drained through the pressure-resistant pipe 14 and the rod 8
a and the flange 15 are raised to move the magnifying plate 13 inward in the radial direction to return the magnifier 7 to the original state shown in FIG. 5, and then the excavator 2 is raised and the magnifier 7 is taken out from the hole 4. . At this time, the magnifier 7 is further stopped in the middle of the hole 4,
As shown in FIG. 4, the hole diameter may be expanded in the middle of the hole 4. Moreover, you may enlarge a hole diameter in the uppermost part of the hole 4 containing the ground surface. After taking out the magnifier 7 from the hole 4, the magnifier 7 is removed from the drilling auger 1.
【００２２】次に、セメント系固化材６と排土５を混合
して穴４の中へ充填しながら掘削機２を支柱３に沿って
下降させ、掘削オーガ１を正転させながら穴４の中を下
降させる。掘削オーガ１を穴４の底部まで移動させる
と、掘削オーガ１の上下方向の移動は停止させ、その位
置で回転方向（正転と逆転）を例えば１０秒ごとに反転
させ、穴４内の固化材と土の混合物を充分に攪拌する。
その後、掘削オーガ１を逆転させながら上昇させ、穴４
から取り出す。穴４内に取り残された土と固化材は、掘
削オーガ１で転圧されて締め固められ、柱状体を形成す
る。Next, the excavator 2 is lowered along the column 3 while mixing the cement-based solidification material 6 and the earth removal 5 and filling the hole 4, and the drill 4 Lower the inside. When the drilling auger 1 is moved to the bottom of the hole 4, the vertical movement of the drilling auger 1 is stopped, and the rotation direction (forward rotation and reverse rotation) is reversed at that position, for example, every 10 seconds. Mix the wood and earth mixture thoroughly.
Then, the drilling auger 1 is lifted while being reversed, and the hole 4
Remove from The soil and solidified material left in the hole 4 are compacted by being compacted by the excavating auger 1 to form a columnar body.
【００２３】穴４の径を押し広げる際に、図５に示す油
圧シリンダ８は図５に示す通り上下方向に駆動する機構
を採用してもよいし、複数の油圧シリンダを水平方向に
放射状に配置して拡大板１３を押し出すようにしてもよ
い。When the diameter of the hole 4 is widened, the hydraulic cylinder 8 shown in FIG. 5 may employ a mechanism for driving the hydraulic cylinder 8 in a vertical direction as shown in FIG. You may make it arrange | position and push out the expansion board 13.
【００２４】拡大板１３を支持するアーム１２及び１７
に加え、図９に示す拡大機７０のようにさらにアーム２
０、２１を設けてもよい。アーム２０の上端は、ピン１
９ａでフランジ１９に回動可能に連結されており、アー
ム２０の下端は拡大板１３に固着したフランジ２２とピ
ン２２ａで回動可能に連結されている。Arms 12 and 17 for supporting magnifying plate 13
In addition to the arm 2 as shown in the magnifier 70 shown in FIG.
0 and 21 may be provided. The upper end of arm 20 is pin 1
The lower end of the arm 20 is rotatably connected to the flange 22 fixed to the magnifying plate 13 by a pin 22a.
【００２５】また、アーム２１の上端はピン２２ａでフ
ランジ２２と回動可能に連結されており、アーム２１の
下端はフランジ２３とピン２３ａで回動可能に連結され
ている。拡大板１３は、フランジ１６及び２２により、
垂直の姿勢を保つように支持されている。ロッド８ａを
下降すると、各アームは拡大板１３を垂直の姿勢を保っ
たまま外方へ押し出し、穴４の内壁を押し広げることが
できる。したがって、図９の拡大機７０では、図５の突
起１２ａは不要である。The upper end of the arm 21 is rotatably connected to the flange 22 by a pin 22a, and the lower end of the arm 21 is rotatably connected to the flange 23 by a pin 23a. The enlarged plate 13 is formed by the flanges 16 and 22.
It is supported to maintain a vertical position. When the rod 8a is lowered, each arm pushes the magnifying plate 13 outward while maintaining the vertical position, and can push out the inner wall of the hole 4. Therefore, in the magnifier 70 of FIG. 9, the projection 12a of FIG. 5 is unnecessary.
【００２６】請求項１〜３の製造方法により製造される
柱状体は、例えば、支持層が３〜５ｍ位の深さで比較的
地盤の柔らかい場所において、主に一般木造住宅の基礎
用として用いると効果的である。The columnar body manufactured by the manufacturing method according to any one of claims 1 to 3 is mainly used as a foundation for a general wooden house, for example, in a place where the support layer has a depth of about 3 to 5 m and the ground is relatively soft. And effective.
【００２７】[0027]
【発明の効果】請求項１の発明によると、円柱状の柱状
体に環状の突起を形成することができるので、土壌と柱
状体の表面との摩擦力が増加し、掘削する穴の深さを従
来より浅くすることができる。従来のストレート形状の
柱状体と比較して、より大きな荷重を支持することがで
きる。したがって、施工時間を短縮することができ、ま
た、工事費も安価となる。According to the first aspect of the present invention, an annular projection can be formed on a columnar body, so that the frictional force between the soil and the surface of the columnar body increases, and the depth of a hole to be excavated is increased. Can be made shallower than before. A larger load can be supported as compared with a conventional straight columnar body. Therefore, the construction time can be reduced, and the construction cost can be reduced.
【００２８】請求項２の発明によると、地表において穴
径を拡大するので、柱状体の上に載る横基礎梁の芯ずれ
が起こりにくくなり、施工が容易になる。According to the second aspect of the present invention, since the hole diameter is increased on the ground surface, the misalignment of the horizontal foundation beam on the columnar body is less likely to occur, and the construction is facilitated.
【００２９】請求項３の発明によると、予め穴４の内壁
を補強しておくので、拡大機７を穴４内に入れる際に穴
４が崩壊することを防止することができ、作業能率が向
上する。According to the third aspect of the present invention, since the inner wall of the hole 4 is reinforced in advance, it is possible to prevent the hole 4 from collapsing when the magnifying machine 7 is inserted into the hole 4, and to reduce the work efficiency. improves.
【００３０】請求項４の発明による乾式柱状体製造装置
では、拡大機７を掘削オーガヘッドの先端に着脱可能に
設けたので、穴４を掘り下げる際には拡大機７は取外し
ておき、穴径を広げる際にのみ拡大機７を取付けること
により、別の装置を調達しなくても同一の掘削機２で掘
削と穴径の押し広げの両方を行うことができる。In the dry columnar body manufacturing apparatus according to the fourth aspect of the present invention, the magnifier 7 is detachably provided at the tip of the auger auger head. By mounting the magnifying machine 7 only when expanding the drilling, it is possible to perform both excavation and pushing and expanding the hole diameter with the same excavator 2 without procuring another device.
【００３１】従来の湿式の柱状体の製造方法において
は、固化材を穴に注入して液圧を穴の内壁にかけながら
掘削して穴径を広げるが、これを乾式の柱状体の製造方
法に適用すると、穴４の内壁が崩壊してしまう。本発明
では、穴径を押圧により広げるので、穴４の内壁を崩壊
させずに穴径を広げることができる。In the conventional method of manufacturing a wet column, a solidifying material is injected into a hole and excavation is performed while applying hydraulic pressure to the inner wall of the hole to increase the hole diameter. If applied, the inner wall of the hole 4 will collapse. In the present invention, since the hole diameter is increased by pressing, the hole diameter can be increased without collapsing the inner wall of the hole 4.
【図１】 掘削機で地中に穴をあける工程を示す全体正
面図である。FIG. 1 is an overall front view showing a step of drilling a hole in the ground with an excavator.
【図２】 図１において、掘削オーガを穴から引き上げ
た状態を示す全体正面図である。FIG. 2 is an overall front view showing a state in which an excavator auger is pulled up from a hole in FIG.
【図３】 掘削オーガヘッドの先端に拡大機を装着し、
拡大機により穴底における穴径を拡大した状態を示す全
体正面図である。[Fig. 3] A magnifier is attached to the tip of the drilling auger head.
It is a whole front view showing the state where the hole diameter in the hole bottom was enlarged by the enlarger.
【図４】 穴の中央付近及び地表の開口において拡大機
により穴径を拡大した状態を示す全体正面図である。FIG. 4 is an overall front view showing a state in which a hole diameter is enlarged by a magnifier near a center of a hole and an opening on the ground surface.
【図５】 収納状態の拡大機の正面図である。FIG. 5 is a front view of the magnifying device in a stored state.
【図６】 拡大途中の拡大機の正面図である。FIG. 6 is a front view of the magnifying device during enlarging.
【図７】 図５のVII−VII矢視図である。FIG. 7 is a view taken in the direction of arrows VII-VII in FIG. 5;
【図８】 図７において、拡大機が拡大した状態を示す
平面図である。FIG. 8 is a plan view showing an enlarged state of the magnifier in FIG.
【図９】 別の拡大機の正面図である。FIG. 9 is a front view of another magnifying device.
１ 掘削オーガ ２ 掘削機 ４ 穴 ５ 排土 ７ 拡大機 １３ 拡大板（穴径拡大板） DESCRIPTION OF SYMBOLS 1 Drilling auger 2 Excavator 4 Hole 5 Discharge 7 Enlarger 13 Enlargement plate (hole diameter enlargement plate)
Claims (4)
表から地中に穴を掘り、前記掘削オーガヘッドの先端に
前記穴の径を押し広げる穴径拡大板を備えた拡大機を装
着し、拡大機を装着した前記掘削オーガを前記穴の中へ
所定深さまで下降させて停止し、穴の内壁を前記穴径拡
大板で押圧することにより穴径を拡大し、穴径を拡大し
た後穴径拡大板を元の状態に収納し、掘削オーガを上昇
させて拡大機を穴から出し、掘削オーガヘッドの先端か
ら拡大機を取外し、前記穴に排土と固化材を充填し又は
充填しながら掘削オーガを正転駆動と逆転駆動を繰り返
しながら穴内に挿入して排土と固化材を攪拌及び転圧す
ることを特徴とする基礎地盤の乾式柱状体製造方法。An excavator having a downward excavation auger digs a hole from the ground surface into the ground, and mounts an enlarger equipped with a hole diameter enlarging plate at the tip of the excavation auger head to expand the diameter of the hole. After the drilling auger equipped with an enlarger is lowered into the hole to a predetermined depth and stopped, the hole diameter is enlarged by pressing the inner wall of the hole with the hole diameter expanding plate, and after the hole diameter is enlarged. The hole diameter enlargement plate is stored in the original state, the drilling auger is raised, the expander is taken out of the hole, the expander is removed from the tip of the drilling auger head, and the hole is filled or filled with the earth discharging and solidifying material. A method of manufacturing a dry columnar body for a foundation ground, wherein an excavation auger is inserted into a hole while repeating forward rotation drive and reverse rotation drive while agitating and compacting an earth removal and a solidified material.
する請求項１に記載の基礎地盤の乾式柱状体製造方法。2. The method according to claim 1, wherein the surface of the ground and the diameter of the hole at a predetermined depth are enlarged by an enlarger.
オーガを穴から引き上げる前に穴に固化材を入れて穴の
内壁を補強し、穴の内壁を補強した後に掘削オーガを穴
から引き上げる請求項１及び請求項２に記載の基礎地盤
の乾式柱状体製造方法。3. An excavator digs a hole in the ground from the surface of the ground, before the drilling auger is pulled out of the hole, puts a solidifying material in the hole to reinforce the inner wall of the hole, and after reinforcing the inner wall of the hole, inserts the drilling auger into the hole. The dry columnar body manufacturing method for foundation ground according to claim 1, wherein the columnar body is pulled up from the ground.
えた拡大機を掘削機の掘削オーガの先端に着脱可能に設
けたことを特徴とする基礎地盤の乾式柱状体製造装置。4. An apparatus for manufacturing a dry columnar body on a foundation ground, characterized in that an enlarger having a hole diameter enlargement plate projecting outward in the radial direction is detachably provided at the tip of an excavator auger of an excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05529499A JP3394002B2 (en) | 1999-03-03 | 1999-03-03 | Dry columnar body manufacturing equipment for foundation ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05529499A JP3394002B2 (en) | 1999-03-03 | 1999-03-03 | Dry columnar body manufacturing equipment for foundation ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000248867A true JP2000248867A (en) | 2000-09-12 |
| JP3394002B2 JP3394002B2 (en) | 2003-04-07 |
Family
ID=12994569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05529499A Expired - Fee Related JP3394002B2 (en) | 1999-03-03 | 1999-03-03 | Dry columnar body manufacturing equipment for foundation ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3394002B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7404453B2 (en) * | 2006-03-07 | 2008-07-29 | Boys Donald R | Method and apparatus for forming square holes for posts |
| JP2016089377A (en) * | 2014-10-30 | 2016-05-23 | Ｏｇａｔａ住宅基盤株式会社 | Ground improvement method, and boring rod and ground improvement device used therefor |
| GB2575766A (en) * | 2018-02-14 | 2020-01-29 | Keltbray Ltd | Groundwork apparatus for use with differently sized foundation excavations |
| CN111779018A (en) * | 2020-06-24 | 2020-10-16 | 中国电建集团福建省电力勘测设计院有限公司 | Mechanical construction method for embedded anchor rod composite foundation of power transmission line |
-
1999
- 1999-03-03 JP JP05529499A patent/JP3394002B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7404453B2 (en) * | 2006-03-07 | 2008-07-29 | Boys Donald R | Method and apparatus for forming square holes for posts |
| JP2016089377A (en) * | 2014-10-30 | 2016-05-23 | Ｏｇａｔａ住宅基盤株式会社 | Ground improvement method, and boring rod and ground improvement device used therefor |
| GB2575766A (en) * | 2018-02-14 | 2020-01-29 | Keltbray Ltd | Groundwork apparatus for use with differently sized foundation excavations |
| GB2575766B (en) * | 2018-02-14 | 2022-11-02 | Keltbray Ltd | Groundwork apparatus for use with differently sized foundation excavations |
| CN111779018A (en) * | 2020-06-24 | 2020-10-16 | 中国电建集团福建省电力勘测设计院有限公司 | Mechanical construction method for embedded anchor rod composite foundation of power transmission line |
| CN111779018B (en) * | 2020-06-24 | 2021-07-02 | 中国电建集团福建省电力勘测设计院有限公司 | Mechanical construction method for embedded anchor rod composite foundation of power transmission line |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3394002B2 (en) | 2003-04-07 |
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