JP2583830B2 - Construction method of concrete deep foundation pile - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、長尺板材により井枠を
形成するコンクリート深礎杭の構築方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a concrete deep foundation pile in which a well frame is formed from long plate materials.

【０００２】[0002]

【従来の技術】従来のコンクリート深礎杭の構築方法
は、図５（Ｌ）に示すように、所定直径で、一台の井枠
の高さに略相当する８０ｃｍ程度の深さの構築穴７０を
掘削し、そして、該構築穴７０の全周に、上下に取付け
孔７１（図６参照）が所定ピッチで複数形成された波形
鉄板からなる土留側壁用材（通常ナマコ板という）７２
を配置する。次に、図７に示すように３分割され、湾曲
アングル７３からなり、その分割端部をネジ連結したリ
ング部材７４を用意し、前記土留側壁用材７２の上部の
取付け孔７１と、前記湾曲アングル７３の垂直部分に形
成されたピン孔７５とを合わせて状態で、ピン７６を挿
通し構築穴７０の側壁７７にこれらを固定し、第１の井
枠７８（図５（Ｌ）参照）を形成する。次に、作業者が
前記構築穴７０に入り、底部を掘削して下方に約８０ｃ
ｍ程度掘り下げ、第１の井枠７８の土留側壁用材７２の
内側下部に一部重合させて、第２の井枠７８用の土留側
壁用材７２を差し込み、前記第１の井枠７８の下部に形
成された取付け孔７１と、前記土留側壁用材７２の上部
に形成された取付け孔７１とを符合させた状態で、別の
リング部材７４をその内側に当接させ、別のピン７６に
よって構築穴７０の側壁７７に固定する。なお、前記ピ
ン７６の基端部は１８０度屈曲し、該屈曲部が前記湾曲
アングル７３の水平部分を挟むようにする。このように
して図５（Ｍ）、図６に示すように徐々に下方に掘削し
ながら、複数の井枠７８を連結し、下層の岩盤８０ａに
到達する所定長さの土留側壁８０を図５（Ｎ）に示すよ
うに構築する。土留側壁８０の形成が完了すると、図５
（Ｏ）に示すように該土留側壁８０の内側に主筋８１及
び連結筋８２を配筋し、コンクリート８３を打設する。
最下段の井枠７８の半分程度迄コンクリート８３が投入
されると、構築穴７０内に作業者が入り、最下段の井枠
７８のピン７６を抜き、リング部材７４を分解して土留
側壁用材７２を抜き取る。このようにしてコンクリート
８３の打設及び下側から順次井枠７８を個々に分解して
外に取り出す作業を交互に行って、図５（Ｐ）に示すよ
うに地表面と同じ高さ程度までコンクリート８３を打設
していた。なお、地表面から２段目までの井枠７８は地
表で組み立て、予め深い構築穴７０を形成した後、これ
らを同時に前記構築穴７０に装入配置することも行われ
ていた。2. Description of the Related Art As shown in FIG. 5 (L), a conventional method of constructing a concrete deep foundation pile has a construction hole having a predetermined diameter and a depth of about 80 cm which is substantially equivalent to the height of one well frame. The excavation is carried out, and a material for a retaining wall (usually a sea cucumber plate) 72 made of a corrugated iron plate in which a plurality of mounting holes 71 (see FIG. 6) are formed at predetermined pitches over the entire circumference of the construction hole 70.
Place. Next, as shown in FIG. 7, a ring member 74 which is divided into three and is formed of a curved angle 73 and whose divided ends are screw-connected is prepared, and a mounting hole 71 at an upper portion of the retaining wall material 72 and the curved angle 73 are formed. With the pin holes 75 formed in the vertical portions of the holes 73 aligned with each other, the pins 76 are inserted and fixed to the side walls 77 of the construction holes 70, and the first well frame 78 (see FIG. 5 (L)) is attached. Form. Next, an operator enters the construction hole 70, excavates the bottom, and moves downward about 80c.
digging down about m, partially overlapping the lower portion of the inside wall of the retaining wall material 72 of the first well frame 78 and inserting the retaining wall material 72 for the second well frame 78 into the lower portion of the first well frame 78 With the formed mounting hole 71 and the mounting hole 71 formed in the upper part of the retaining wall material 72 aligned with each other, another ring member 74 is brought into contact with the inside thereof, and another pin 76 is used to construct the mounting hole. 70 is fixed to the side wall 77. The base end of the pin 76 is bent 180 degrees so that the bent portion sandwiches the horizontal portion of the curved angle 73. In this way, as shown in FIGS. 5 (M) and 6, while excavating gradually downward, the plurality of well frames 78 are connected, and the retaining wall 80 having a predetermined length reaching the lower rock 80a is formed. Construct as shown in (N). When the formation of the retaining wall 80 is completed, FIG.
As shown in (O), a main reinforcement 81 and a connecting reinforcement 82 are arranged inside the retaining wall 80, and concrete 83 is poured.
When the concrete 83 is put into about half of the bottom well 78, an operator enters the construction hole 70, pulls out the pin 76 of the bottom well 78, disassembles the ring member 74, disassembles the soil retaining wall material, Remove 72. In this way, the work of placing the concrete 83 and disassembling the wells 78 individually from the lower side and taking them out alternately are performed alternately until the wells 78 reach the same height as the ground surface as shown in FIG. Concrete 83 was being cast. In addition, the well frame 78 from the ground surface to the second stage was assembled on the surface of the ground, and after forming deep construction holes 70 in advance, these were also charged and arranged in the construction holes 70 at the same time.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、このコ
ンクリート深礎杭の構築方法では、地盤が柔らかく水の
多い場所では、幅の広い土留側壁用材７２を所定深さ差
し込みながら工事を行う必要があり、施工が難しいとい
う問題があった。また、鉄製の土留側壁用材７２では鉄
材が高いのでコスト高となるため、全ての井枠７８を分
解し取り出して繰り返し使用するので、非常に工事に手
間がかかり、面倒であるという問題があった。更に、前
記井枠７８を次のコンクリート深礎杭の構築に使用する
ので、コンクリート深礎杭の構築工事があまり多く平行
して行えず、そのために多数の深礎杭を同時に構築する
場合には長い工期がかかっていた。本発明はこのような
事情に鑑みなされたもので、低コストで、工期が短くて
済むコンクリート深礎杭の構築方法を提供することを目
的とする。However, in this method of constructing a concrete deep foundation pile, in a place where the ground is soft and has a lot of water, it is necessary to perform the construction while inserting a wide soil retaining wall material 72 to a predetermined depth. There was a problem that construction was difficult. Further, since the iron material for the retaining wall 72 is expensive because of the high iron material, all the well frames 78 are disassembled, taken out and used repeatedly, so that there is a problem that the work is extremely troublesome and troublesome. . Furthermore, since the well frame 78 is used for the construction of the next concrete deep foundation pile, the construction work of the concrete deep foundation pile cannot be performed in parallel so much. It took a long construction period. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for constructing a concrete deep foundation pile that requires a low cost and a short construction period.

【０００４】[0004]

【課題を解決するための手段】前記目的に沿う請求項１
記載のコンクリート深礎杭の構築方法は、予め隙間を有
して配置された複数のリング部材の全外周に複数の長尺
板材が固定されている第１の井枠を作り、該第１の井枠
を略垂直に掘削された１段目の構築穴に垂直配置し、そ
の外側を埋め戻しする第１の工程と、前記第１の井枠内
に作業者が入って前記１段目の構築穴の底部を掘削し、
掘削した土をバケットと地表面に設けられた昇降手段に
より外部に取り出して、前記第１の井枠の内径と略同じ
径で、下方に一定深さ掘削して２段目の構築穴の一部を
形成する第２の工程と、前記２段目の構築穴の一部に、
昇降手段により第２の井枠用の複数のリング部材及び複
数の長尺板材を降ろし、前記第１の井枠の内側下部に一
部重合させて前記昇降手段によって降ろした複数の長尺
板材を敷き詰め、その後、該敷き詰めた複数の長尺板材
の内側に前記昇降手段によって降ろした複数のリング部
材を配置して第２の井枠を組み立てる第３の工程と、前
記２段目の構築穴の残りを掘削し、掘削した土を前記バ
ケットと前記昇降手段により取り出しながら、前記第１
の井枠の下端部と前記第２の井枠の上端が少しの長さ重
合する位置まで下げる第４の工程と、前記第２〜第４の
工程を繰り返して一部重合した複数の井枠からなる所定
長の土留側壁を形成する第５の工程と、前記土留側壁の
内側に配筋してコンクリートを打設する第６の工程とを
有して構成されている。請求項２記載のコンクリート深
礎杭の構築方法は、請求項１記載のコンクリート深礎杭
の構築方法において、前記長尺板材は木材からなって、
前記リング部材はリング状に曲げられ先部が一部重合す
る鉄筋材から構成されている。According to the present invention, there is provided a semiconductor device comprising:
The method for constructing a concrete deep foundation pile according to the first aspect includes forming a first well frame in which a plurality of long plate members are fixed to the entire outer periphery of a plurality of ring members arranged with a gap in advance, and A first step of vertically arranging the well frame in the first-stage construction hole excavated substantially vertically, and backfilling the outside thereof; and Drill the bottom of the construction hole,
The excavated soil is taken out to the outside by a bucket and an elevating means provided on the ground surface, and is excavated to a depth substantially equal to the inner diameter of the first well frame and to a certain depth downward to form one of the second-stage construction holes. A second step of forming a portion, and a part of the second-stage construction hole,
The plurality of ring members and the plurality of long plate members for the second well frame are lowered by the elevating means, and the plurality of long plate materials lowered by the elevating means are partially overlapped on the lower inside of the first well frame. Laying, thereafter, a third step of arranging a plurality of ring members lowered by the elevating means inside the laid plurality of long plate members to assemble a second well frame, and Excavating the rest, taking out the excavated soil by the bucket and the lifting / lowering means,
A fourth step of lowering the lower end of the well frame and the upper end of the second well frame to a position where they overlap by a small length; and a plurality of well frames partially overlapped by repeating the second to fourth steps. And a sixth step of arranging reinforcing bars inside the retaining wall and placing concrete therein. The method for constructing a concrete deep foundation pile according to claim 2 is the method for constructing a concrete deep foundation pile according to claim 1, wherein the long plate material is made of wood.
The ring member is made of a reinforcing material which is bent into a ring shape and partially overlaps the tip.

【０００５】[0005]

【作用】請求項１及び２記載のコンクリート深礎杭の構
築方法においては、１段目の構築穴を略垂直に掘削し、
該１段目の構築穴に、予めリング部材の全外周に複数の
長尺板材が取り付けられている第１の井枠を垂直配置
し、該第１の井枠の外側を埋め戻ししているので、第１
の井枠は地面に固定される。そして、前記第１の井枠内
に作業者が入って、前記１段目の構築穴の底部を該第１
の井枠の内径と略同じ径で下方に一定深さ掘削して２段
目の構築穴の一部を形成すると共に、掘削した土をバケ
ットと地表面に設けられた昇降手段により取り出す。そ
して、前記前記２段目の構築穴の一部に、昇降手段によ
り第２の井枠用の複数のリング部材及び複数の長尺板材
を降ろし、前記第１の井枠の内側下部に一部重合させて
前記昇降手段によって降ろした複数の長尺板材を敷き詰
め、その後、該敷き詰めた複数の長尺板材の内側に前記
昇降手段によって降ろした複数のリング部材を配置して
第２の井枠を組み立てる。組み立てが終わると前記２段
目の構築穴の残りを掘削し、掘削した土を前記バケット
と前記昇降手段により取り出しながら、前記第１の井枠
の下端部と前記第２の井枠の上端が少しの長さ重合する
位置まで下げる。この場合、第２の井枠を徐々に下げて
いくことにより、構築穴の側壁の崩壊を防ぐことができ
る。そして、第２の井枠の場合と同様な工程を繰り返し
て一部重合した複数の井枠からなる所定長の土留側壁を
形成する。該土留側壁の内側に配筋してコンクリートを
打設する。この場合、それぞれの井枠は埋めたままなの
で、井枠を取り出す手間が省ける。特に、請求項２記載
のコンクリート深礎杭の構築方法においては、前記長尺
板材は木材からなり、前記リング部材は鉄筋材からなる
ので、低コストで井枠を製作することができる。また、
前記リング部材はリング状に曲げられ先部が一部重合す
るので、リング部材を縮めて垂直配置されている井枠内
に降ろすことができる。In the method for constructing a concrete deep foundation pile according to claims 1 and 2, the first-stage construction hole is excavated substantially vertically,
In the first-stage construction hole, a first well frame in which a plurality of long plate members are attached in advance to the entire outer periphery of the ring member is vertically arranged, and the outside of the first well frame is backfilled. So the first
Is fixed to the ground. Then, an operator enters the first well frame, and moves the bottom of the first-stage construction hole to the first well.
The excavated soil is excavated downward at a depth substantially equal to the inner diameter of the well frame to a predetermined depth to form a part of the second-stage construction hole, and the excavated soil is taken out by a bucket and lifting means provided on the ground surface. Then, a plurality of ring members and a plurality of long plate members for the second well frame are lowered into a part of the second-stage construction hole by elevating means, and a part of the second well member is provided at a lower portion inside the first well frame. A plurality of long plate materials that have been polymerized and lowered by the elevating means are laid down, and thereafter, a plurality of ring members lowered by the elevating means are arranged inside the laid out long plate materials to form a second well frame. assemble. When the assembling is completed, the lower end of the first well frame and the upper end of the second well frame are excavated while excavating the remaining of the second-stage construction hole and taking out the excavated soil by the bucket and the lifting / lowering means. Lower it to a position where it will polymerize for a short length. In this case, by gradually lowering the second well frame, collapse of the side wall of the construction hole can be prevented. Then, the same steps as in the case of the second well frame are repeated to form a soil retaining sidewall of a predetermined length composed of a plurality of well frames partially overlapped. Reinforcing concrete inside the retaining wall and placing concrete. In this case, each well is left buried, so that it is not necessary to remove the well. In particular, in the method for constructing a concrete deep foundation pile according to claim 2, the long plate member is made of wood, and the ring member is made of a reinforced material, so that a well frame can be manufactured at low cost. Also,
Since the ring member is bent into a ring shape and a part thereof overlaps, the ring member can be contracted and lowered into a vertically arranged well frame.

【０００６】[0006]

【実施例】続いて、添付した図面を参照しつつ、本発明
を具体化した実施例につき説明し、本発明の理解に供す
る。ここに、図１及び図２は本発明の一実施例に係るコ
ンクリート深礎杭の構築方法の概略説明図、図３は第１
の井枠の斜視図、図４は図２（Ｇ）における矢視Ｋ−Ｋ
断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 and FIG. 2 are schematic explanatory diagrams of a method of constructing a concrete deep foundation pile according to one embodiment of the present invention, and FIG.
FIG. 4 is a perspective view of the well frame shown in FIG.
It is sectional drawing.

【０００７】図１〜図４を参照しながら本発明の一実施
例に係るコンクリート深礎杭の構築方法について説明す
る。まず、図３に示すように厚み１０〜１５ｍｍ程度、
幅が１０５ｍｍ程度、長さが２〜４ｍ程度の複数の木製
長尺板材１０をリング部材１１の外周全体に配置し、１
０〜１２番線で長尺板材１０を結びリング部材１１に固
着して、コンクリート深礎杭１２（図示せず）の直径よ
り１０ｃｍ程度大きな第１の井枠１４を製作する。そし
て、図１（Ａ）に示すように上側が構築されるコンクリ
ート深礎杭１２の外径より２０ｃｍ程度大きく、下側が
構築されるコンクリート深礎杭１２の外径よりも１０ｃ
ｍ程度大きな断面が逆台形の１段目の構築穴１５を垂直
方向に掘削する。該一段目の構築穴１５に前記第１の井
枠１４をクレーン１４ａで吊り上げて垂直に配置する。
その場合、第１の井枠１４の内部に地上物が落下しない
ように第１の井枠１４の上部を３０〜５０ｃｍ程度地表
から突出するようにする。また、第１の井枠１４の周囲
は埋め戻ししておく。A method of constructing a concrete deep foundation pile according to one embodiment of the present invention will be described with reference to FIGS. First, as shown in FIG.
A plurality of long wooden plates 10 each having a width of about 105 mm and a length of about 2 to 4 m are arranged on the entire outer periphery of the ring member 11, and
The long plate material 10 is tied to the ring member 11 along the lines 0 to 12 to manufacture the first well frame 14 which is about 10 cm larger than the diameter of the concrete deep foundation pile 12 (not shown). Then, as shown in FIG. 1A, the outer diameter of the concrete deep foundation pile 12 constructed on the upper side is about 20 cm larger than the outer diameter of the concrete deep foundation pile 12 constructed on the lower side, and 10c is larger than the outer diameter of the concrete deep foundation pile 12 constructed on the lower side.
A first-stage construction hole 15 having an inverted trapezoid whose cross section is as large as m is excavated in the vertical direction. The first well frame 14 is lifted by the crane 14a and vertically arranged in the first-stage construction hole 15.
In this case, the upper part of the first well frame 14 is projected from the ground surface by about 30 to 50 cm so that the ground object does not fall into the first well frame 14. Further, the periphery of the first well frame 14 is backfilled.

【０００８】そして、図１（Ｂ）に示すように第１の井
枠１４の中に作業者１６が入って該第１の井枠１４の内
径と略同じ径で５０ｃｍ程度１段目の構築穴１５の底部
を掘削すると共に、掘削した土をバケット２０と地表面
に設けられた昇降手段により取り出している。該昇降手
段は一例として第１の井枠１４の上部の仮架台１７と、
仮架台１７に取り付けられているウインチ１８及び滑車
１９とを有し、ウインチ１８を作動させてワイヤロープ
２１を滑車１９で支持しながら緩めたり、巻き戻してワ
イヤロープ２１の先端に取り付けられているフック２０
ａに下げたバケット２０を昇降させるようにしている。
このようにして、土を取り出しながら２段目の構築穴２
２の一部を形成する。Then, as shown in FIG. 1 (B), a worker 16 enters the first well frame 14 and has a diameter substantially equal to the inner diameter of the first well frame 14 and is about 50 cm in the first stage construction. The bottom of the hole 15 is excavated, and the excavated soil is taken out by the bucket 20 and the elevating means provided on the ground surface. The elevating means includes, as an example, a temporary gantry 17 above the first well frame 14,
It has a winch 18 and a pulley 19 attached to the temporary gantry 17. The winch 18 is actuated to loosen the wire rope 21 while supporting it with the pulley 19, or unwind and attached to the tip of the wire rope 21. Hook 20
The bucket 20 lowered to a is moved up and down.
In this way, while removing the soil, the second-stage construction hole 2
2 is formed.

【０００９】掘削が済むと図１（Ｃ）に示すように前記
昇降手段と同じウインチ１８を作動させて先端にフック
２０ａが取り付けられているワイヤロープ２１を滑車１
９で支持しながら第２の井枠２３用の長尺板材２４及び
リング部材２５を降ろす。この場合、リング部材２５は
図３に示すリング部材１１と同様にリング状に曲げられ
先部を一部重合させて、リング部材２５を少し小さな径
に縮めた状態にして第１の井枠１４内に入り易くしてお
く。そして、前記長尺板材１０の内側全周に、該長尺板
材１０と一部重合させて前記長尺板材２４を配置し、そ
の後、該長尺板材２４の内側に前記リング部材２５を１
０〜１２番線で括り付けて第２の井枠２３を組み立て
る。更に、前記２段目の構築穴２２の残りを掘削し、掘
削した土をバケット２０で取り出しながら一枚づつ長尺
板材２４を下げていき、徐々に前記第２の井枠２３を所
定位置まで下げていく。この場合、長尺板材１０と長尺
板材２４の重合部（ｈ）は５０ｃｍ程度である。そし
て、第２の井枠２３の場合と同様にして、図１（Ｅ）に
示すように３段目の構築穴２６に、長尺板材２７及びリ
ング部材２８によって第３の井枠２９を組み立てる。こ
のようにして、第１の井枠〜第３の井枠１４、２３、２
９による土留側壁３０を形成する。該土留側壁３０の内
側に図２（Ｆ）、（Ｇ）及び図４に示すように主筋３１
及び連結筋３２を配筋して、図２（Ｈ）に示すようにコ
ンクリート３３を打設してコンクリート深礎杭を構築す
る。図１（Ｅ）における１４ｂは送風ダクトである。こ
のように、長尺板材１０、２４、２７は木製の板材から
なり、リング部材１１、２５、２８は鉄筋からなるの
で、コストを低減でき、該長尺板材１０、２４、２７及
びリング部材１１、２５、２８を使用した第１〜第３の
井枠１４、２３、２９は埋めたままなので、抜き取る手
間を省くことができる。When the excavation is completed, the same winch 18 as that of the elevating means is actuated to pull the wire rope 21 having the hook 20a attached to its tip as shown in FIG.
9, the long plate member 24 and the ring member 25 for the second well frame 23 are lowered. In this case, the ring member 25 is bent in a ring shape similarly to the ring member 11 shown in FIG. 3, and a part thereof is partially overlapped so that the ring member 25 is reduced to a slightly smaller diameter. Make it easy to enter. Then, the long plate member 24 is disposed by partially overlapping the long plate member 10 around the entire inner periphery of the long plate member 10, and then the ring member 25 is placed inside the long plate member 24.
The second well frame 23 is assembled by being tied up with the lines 0 to 12. Further, the rest of the second-stage construction hole 22 is excavated, and the excavated soil is taken out by the bucket 20 while the long plate material 24 is lowered one by one, and the second well frame 23 is gradually moved to a predetermined position. I will lower it. In this case, the overlap portion (h) between the long plate material 10 and the long plate material 24 is about 50 cm. Then, in the same manner as in the case of the second well frame 23, a third well frame 29 is assembled with the long plate material 27 and the ring member 28 in the third-stage construction hole 26 as shown in FIG. . In this manner, the first to third well frames 14, 23, 2
9 to form the retaining wall 30. As shown in FIGS. 2 (F), (G) and FIG.
Then, the connecting bars 32 are arranged, and concrete 33 is cast as shown in FIG. 2 (H) to construct a concrete deep foundation pile. Reference numeral 14b in FIG. 1 (E) denotes a ventilation duct. As described above, the long plates 10, 24, 27 are made of a wooden plate, and the ring members 11, 25, 28 are made of a reinforcing bar, so that the cost can be reduced, and the long plates 10, 24, 27 and the ring member 11 can be reduced. , 25, and 28, since the first to third well frames 14, 23, and 29 remain buried, it is possible to save time and effort for removing the wells.

【００１０】本実施例においては、３段の井枠１４、２
３、２９により土留側壁３０を形成したが、これに限定
されるものでなく、３段よりも少なくてもよいし、３段
よりも多くてもよい。In this embodiment, three wells 14, 2
The retaining wall 30 is formed by 3 and 29, but is not limited to this, and may be less than three steps or more than three steps.

【００１１】[0011]

【発明の効果】請求項１及び２記載のコンクリート深礎
杭は、予め隙間を有して配置された複数のリング部材の
全外周に複数の長尺板材が固定されている第１の井枠を
作り、該第１の井枠を略垂直に掘削された１段目の構築
穴に垂直配置し、その外側を埋め戻し、前記１段目の構
築穴の底部を掘削して２段目の構築穴の一部を形成し、
該２段目の構築穴の一部に、前記第１の井枠の内側下部
に一部重合させて複数の長尺板材を敷き詰め、その後、
該敷き詰めた複数の長尺板材の内側に複数のリング部材
を配置して第２の井枠を組み立て、更に、前記２段目の
構築穴の残りを掘削し、前記第１の井枠の下端部と前記
第２の井枠の上端が少しの長さ重合する位置まで下げて
いき、そして、第２の井枠と同様の作業を繰り返して複
数の井枠からなる土留側壁を形成し、その後配筋し、コ
ンクリートを打設するので、短い工期でコンクリート深
礎杭を構築することができる。また、それぞれの長尺板
材及びリング部材からなる井枠は埋め殺しするので、従
来のように井枠を取り出す手間を省くことができ、そし
て、従来のように使用中の井枠を待つ必要もないので、
平行して多くのコンクリート深礎杭の構築の工事を行う
ことができる。更に、それぞれの長尺板材及びリング部
材は嵩張らないので、輸送が容易であり、構築にあって
は、長尺板材を配置した後、リング部材を内側に配置し
ているので、外側から荷重がかかっても支持できる。ま
た、長尺板材を使用しているので、縦長の井枠が形成で
き、これによって井枠の段数も減少し、効率的な構築が
できる。特に、請求項２記載のコンクリート深礎杭の構
築方法は、前記長尺板材は木材からなって、前記リング
部材は鉄筋材からなるので、従来のナマコ板（波板鉄
板）を使用した工法よりも低コストでコンクリート深礎
杭を構築することができる。また、前記リング部材はリ
ング状に曲げられ先部が一部重合するので、径を小さく
して穴に入れるのが容易になる。In the concrete deep foundation pile according to the first and second aspects, a first well frame in which a plurality of long plate members are fixed to the entire outer periphery of a plurality of ring members arranged with a gap in advance. The first well frame is vertically arranged in the first-stage construction hole which has been excavated substantially vertically, the outside thereof is backfilled, and the bottom of the first-stage construction hole is excavated to form the second well frame. Forming part of the construction hole,
In a part of the second-stage construction hole, a plurality of long plate materials are spread by partially superimposing the inner lower part of the first well frame, and thereafter,
A plurality of ring members are arranged inside the spread long plate members to assemble a second well frame, and further, the remaining of the second-stage construction hole is excavated, and a lower end of the first well frame is excavated. Part and the upper end of the second well frame are lowered to a position where they overlap a little length, and the same operation as the second well frame is repeated to form a retaining wall composed of a plurality of well frames, and thereafter Since the reinforcing bars are laid and the concrete is cast, the concrete deep foundation pile can be constructed in a short construction period. In addition, since the well frame composed of each long plate material and the ring member is buried, it is possible to save the trouble of taking out the well frame as in the conventional case, and it is also necessary to wait for the well frame in use as in the conventional case. Since there is no,
Construction of many concrete deep foundation piles can be performed in parallel. Furthermore, since each long plate material and ring member are not bulky, transportation is easy, and in construction, since the long plate material is arranged, the ring member is arranged inside, so that a load is applied from the outside. We can support even if we take. In addition, since a long plate material is used, a vertically long well frame can be formed, thereby reducing the number of steps of the well frame and enabling efficient construction. In particular, in the method for constructing a concrete deep foundation pile according to claim 2, since the long plate is made of wood and the ring member is made of a reinforced material, a method using a conventional sea cucumber board (corrugated iron plate) is used. Even low cost concrete deep foundation piles can be constructed. Further, since the ring member is bent in a ring shape and a part of the tip portion overlaps, it is easy to reduce the diameter and insert the ring member into the hole.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施例に係るコンクリート深礎杭の
構築方法の概略説明図である。FIG. 1 is a schematic explanatory view of a method for constructing a concrete deep foundation pile according to one embodiment of the present invention.

【図２】本発明の一実施例に係るコンクリート深礎杭の
構築方法の概略説明図である。FIG. 2 is a schematic explanatory view of a method for constructing a concrete deep foundation pile according to one embodiment of the present invention.

【図３】第１の井枠の斜視図である。FIG. 3 is a perspective view of a first well frame.

【図４】図２（Ｇ）における矢視Ｋ−Ｋ断面図である。FIG. 4 is a sectional view taken along the line KK in FIG. 2 (G).

【図５】従来例に係るコンクリート深礎杭の構築方法の
概略説明図である。FIG. 5 is a schematic explanatory view of a method for constructing a concrete deep foundation pile according to a conventional example.

【図６】従来例に係る井枠の正断面図である。FIG. 6 is a front sectional view of a well frame according to a conventional example.

【図７】従来例に係る井枠の平面図である。FIG. 7 is a plan view of a well frame according to a conventional example.

【符号の説明】[Explanation of symbols]

１０ 長尺板材 １１ リング部材 １２ コンクリート深礎杭 １４ 第１の井枠 １４ａ クレーン １４ｂ 送風ダクト １５ １段目の構築穴 １６ 作業者 １７ 仮架台 １８ ウインチ １９ 滑車 ２０ バケット ２０ａ フック ２１ ワイヤロープ ２２ ２段目の構築穴 ２３ 第２の井枠 ２４ 長尺板材 ２５ リング部材 ２６ ３段目の構築穴 ２７ 長尺板材 ２８ リング部材 ２９ 第３の井枠 ３０ 土留側壁 ３１ 主筋 ３２ 連結筋 ３３ コンクリート REFERENCE SIGNS LIST 10 long plate material 11 ring member 12 concrete deep foundation pile 14 first well frame 14 a crane 14 b air duct 15 first-stage construction hole 16 worker 17 temporary mount 18 winch 19 pulley 20 bucket 20 a hook 21 wire rope 22 two-stage Eye construction hole 23 Second well frame 24 Long plate material 25 Ring member 26 Third stage construction hole 27 Long plate material 28 Ring member 29 Third well frame 30 Soil side wall 31 Main bar 32 Connecting bar 33 Concrete

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 予め隙間を有して配置された複数のリン
グ部材の全外周に複数の長尺板材が固定されている第１
の井枠を作り、該第１の井枠を略垂直に掘削された１段
目の構築穴に垂直配置し、その外側を埋め戻しする第１
の工程と、 前記第１の井枠内に作業者が入って前記１段目の構築穴
の底部を掘削し、掘削した土をバケットと地表面に設け
られた昇降手段により外部に取り出して、前記第１の井
枠の内径と略同じ径で、下方に一定深さ掘削して２段目
の構築穴の一部を形成する第２の工程と、 前記２段目の構築穴の一部に、昇降手段により第２の井
枠用の複数のリング部材及び複数の長尺板材を降ろし、
前記第１の井枠の内側下部に一部重合させて前記昇降手
段によって降ろした複数の長尺板材を敷き詰め、その
後、該敷き詰めた複数の長尺板材の内側に前記昇降手段
によって降ろした複数のリング部材を配置して第２の井
枠を組み立てる第３の工程と、 前記２段目の構築穴の残りを掘削し、掘削した土を前記
バケットと前記昇降手段により取り出しながら、前記第
１の井枠の下端部と前記第２の井枠の上端が少しの長さ
重合する位置まで下げる第４の工程と、 前記第２〜第４の工程を繰り返して一部重合した複数の
井枠からなる所定長の土留側壁を形成する第５の工程
と、 前記土留側壁の内側に配筋してコンクリートを打設する
第６の工程とを有してなることを特徴とするコンクリー
ト深礎杭の構築方法。1. A first structure in which a plurality of long plate members are fixed to the entire outer periphery of a plurality of ring members arranged with a gap in advance.
A first well frame is formed, and the first well frame is vertically arranged in the first-stage construction hole which is substantially vertically excavated, and the outside is backfilled with the first well frame.
An operator enters the first well frame, excavates the bottom of the first-stage construction hole, and takes out the excavated soil to the outside by a bucket and lifting means provided on the ground surface, A second step of forming a part of a second-stage construction hole by excavating downward at a depth substantially equal to the inner diameter of the first well frame, and a part of the second-stage construction hole; The lowering means lowers the plurality of ring members and the plurality of long plate members for the second well frame,
A plurality of long plate materials partially overlapped on the lower portion inside the first well frame and lowered by the raising / lowering means are spread, and then, a plurality of long plate materials lowered by the raising / lowering means inside the plurality of spread long plate materials. A third step of arranging a ring member to assemble a second well frame, excavating the rest of the second-stage construction hole, and taking out the excavated soil by the bucket and the lifting / lowering means, A fourth step of lowering the lower end portion of the well frame and the upper end of the second well frame to a position where the length overlaps a little, and from a plurality of well frames partially polymerized by repeating the second to fourth steps. A fifth step of forming a retaining wall having a predetermined length, and a sixth step of placing concrete inside the retaining wall and placing concrete therein. How to build. 【請求項２】 前記長尺板材は木材からなって、前記リ
ング部材はリング状に曲げられ先部が一部重合する鉄筋
材からなる請求項１記載のコンクリート深礎杭の構築方
法。2. The method for constructing a concrete deep foundation pile according to claim 1, wherein said long plate material is made of wood, and said ring member is made of a reinforcing steel material which is bent in a ring shape and partially overlaps its tip.