JP2022120301A - Earth retaining wall formation method - Google Patents

Earth retaining wall formation method Download PDF

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JP2022120301A
JP2022120301A JP2021017112A JP2021017112A JP2022120301A JP 2022120301 A JP2022120301 A JP 2022120301A JP 2021017112 A JP2021017112 A JP 2021017112A JP 2021017112 A JP2021017112 A JP 2021017112A JP 2022120301 A JP2022120301 A JP 2022120301A
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retaining wall
drilling
earth retaining
pile
excavation
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JP6909530B1 (en
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統夫 市川
Tsuneo Ichikawa
和也 松葉
Kazuya Matsuba
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Meisei Kenzai Co Ltd
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Abstract

To provide an earth retaining wall formation method which enables formation of an earth retaining wall without distorting an axis of a boring hole.SOLUTION: An earth retaining wall formation method includes: a step A of boring excavation holes 20 for piles in a line in an object part to be bored forming an earth retaining wall with a predetermined interval by a uniaxial method; a step B of building H-shaped steel 30 as a pile into the excavation hole 20 for the pile; and a step C of boring an excavation hole 40 for connection between the adjacent excavation holes 20 for the piles by the uniaxial method, wherein a guide member 50 having blade parts 52 stretched to right and left sides is mounted on a uniaxial screw member 11 used when the excavation hole 40 for connection is bored in the step C, and the excavation hole 40 for connection is bored by inserting each of the blade parts 52 between flanges 31 of the H-shaped steel 30 arranged at both of the adjacent sides in the step C.SELECTED DRAWING: Figure 7

Description

本発明は、主に単軸方式で掘削孔を穿って形成する土留め壁形成工法、及び当該土留め壁形成工法で用いられるガイド部材に関する。 TECHNICAL FIELD The present invention relates to an earth retaining wall forming method for forming an excavated hole mainly by a uniaxial method, and a guide member used in the earth retaining wall forming method.

従来から、地下構造物を構築する際等に地面を掘削する際には、土留め壁を設けることが行われている。土留め壁には様々な種類のものがあるが、小規模な工事現場においては例えば特許文献１に開示されているような親杭横矢板工法がよく用いられている。 2. Description of the Related Art Conventionally, when excavating the ground for constructing an underground structure or the like, an earth retaining wall is provided. There are various types of earth retaining walls, but in small-scale construction sites, the parent pile horizontal sheet pile construction method disclosed in Patent Document 1, for example, is often used.

親杭横矢板工法で行われる地面の穿孔は一般的に、図９に示すように、土留め壁を形成する穿孔対象部に所定間隔を置いて単軸方式で第一の孔１０１を一列状に穿ち、その後単軸方式で第一の孔１０１の間を第二の孔１０２で穿って孔を列状に繋げる。 As shown in FIG. 9, the drilling of the ground performed by the main pile horizontal sheet pile method is generally performed by uniaxially drilling the first holes 101 in a line at predetermined intervals in the drilling target part that forms the earth retaining wall. and then uniaxially drill the second holes 102 between the first holes 101 to connect the holes in a row.

特開２００５－２６４５３４号公報JP 2005-264534 A

ここで、上述の第二の孔を穿つ際に、図９（ｃ）に示すように、既に形成されている第一の孔によって穿孔の軸が歪んでしまって予定通りの孔を形成することができなくなる問題がある。特に、小規模な工事現場においては小型のオーガー等の穿孔機械によって穿孔作業が行われるが、小型の穿孔機械は特に軸を安定させ辛く、隣接する第一の孔の方向へ軸が向かってしまい第二の孔を予定通りに形成することが困難となる問題が発生し易くなる。 Here, when drilling the second hole described above, as shown in FIG. There is a problem that it becomes impossible. In particular, small-scale drilling machines such as augers are used for drilling at small-scale construction sites. A problem that it is difficult to form the second hole as planned is likely to occur.

そこで本発明は、穿孔の軸を歪ませずに土留め壁を形成できる土留め壁形成工法を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an earth retaining wall forming method capable of forming an earth retaining wall without distorting the axis of drilling.

また本発明は、穿孔の軸を歪ませずに土留め壁を形成できるガイド部材を提供することを目的とする。 Another object of the present invention is to provide a guide member capable of forming an earth retaining wall without distorting the axis of drilling.

本発明は、土留め壁を形成する穿孔対象部に、所定間隔を置いて単軸方式で杭用掘削孔を一列状に穿つ工程Ａと、杭としてのＨ形鋼を前記杭用掘削孔に、当該Ｈ形鋼に形成された一対のフランジが前記杭用掘削孔における列方向に沿って差し出されるように建て込む工程Ｂと、前記隣り合う杭用掘削孔間に、単軸方式で連結用掘削孔を穿つ工程Ｃと、を含み、さらに、前記工程Ｃで連結用掘削孔を穿つ際に用いられる単軸型スクリュー部材には、当該単軸型スクリュー部材に遊嵌された、左右両側に差し出された羽根部を有するガイド部材が取り付けられており、前記工程Ｃは、両隣に配された前記Ｈ形鋼の各一対のフランジ間に前記羽根部を各々差し入れて前記連結用掘削孔を穿つことを特徴とする土留め壁形成工法である。 The present invention comprises a step A of drilling a line of excavation holes for piles by a uniaxial method at a predetermined interval in a part to be drilled that forms an earth retaining wall; , a step B of erecting so that a pair of flanges formed on the H-section steel are protruding along the row direction of the pile excavation hole, and connecting between the adjacent pile excavation holes in a uniaxial manner. and a step C of drilling a bore hole for connection, and further, a single shaft type screw member used when drilling a bore hole for connection in the step C has left and right sides loosely fitted in the single shaft type screw member. A guide member having a blade portion protruded to the side is attached, and the step C is performed by inserting the blade portion between each pair of flanges of the H-shaped steel arranged on both sides to form the connecting bore hole It is an earth retaining wall formation method characterized by drilling.

かかる構成にあっては、前記工程Ｂにおいて建て込まれたＨ形鋼に前記ガイド部材の羽根部を沿わせて前記連結用掘削孔を穿つため、当該連結用掘削孔の軸が歪むことなく隣接するＨ形鋼の建て込まれた深さ方向に沿って穿孔を行うことができる。 In such a configuration, since the connecting excavated hole is drilled so that the blade portion of the guide member is aligned with the H-shaped steel erected in the step B, the axis of the connecting excavated hole is adjacent without being distorted. Drilling can be performed along the depth direction in which the H-shaped steel is erected.

また本発明は、単軸型スクリュー部材に取り付けられるガイド部材であって、前記単軸型スクリュー部材に遊嵌される筒状の本体部と、前記本体部から左右両側に差し出された一対の羽根部と、を備え、予め杭として建て込まれた一対のＨ形鋼の間に前記単軸型スクリュー部材を用いて穿孔する際に、前記各Ｈ形鋼に形成されている一対のフランジ間に前記羽根部が各々差し入れられた状態となることを特徴とするガイド部材である。 The present invention also provides a guide member to be attached to a single-axis screw member, comprising a cylindrical main body portion loosely fitted to the single-axis screw member, and a pair of guide members extending from the main body portion to the left and right sides. and between a pair of flanges formed on each of the H-section steels when boring is performed using the single-axis screw member between a pair of H-section steels built in advance as piles. The guide member is characterized in that the blades are inserted into the respective blades.

かかる構成にあっては、予め建て込まれているＨ形鋼に前記羽根部を沿わせて穿孔することができるため、孔の軸が歪むことなく隣接するＨ形鋼の建て込まれた深さ方向に沿って穿孔を行うことができる。 With such a configuration, since the blade portion can be drilled along the H-section steel that has been built in advance, the depth of the adjacent H-section steel can be adjusted without the axis of the hole being distorted. Perforations can be made along a direction.

本発明の土留め壁形成工法は、孔を穿つ際に軸が歪まないという優れた効果がある。 The earth retaining wall forming method of the present invention has an excellent effect that the shaft is not distorted when drilling a hole.

また本発明のガイド部材は、孔を穿つ際に軸が歪まないという優れた効果がある。 Further, the guide member of the present invention has an excellent effect that the shaft is not distorted when drilling a hole.

実施例におけるオーガーの側面図である。Fig. 10 is a side view of an auger in an example; 実施例における土留め壁形成工法の手順を示す説明図である。It is explanatory drawing which shows the procedure of the earth retaining wall formation construction method in an Example. 実施例における土留め壁形成工法の手順を示す説明図である。It is explanatory drawing which shows the procedure of the earth retaining wall formation construction method in an Example. 実施例における土留め壁形成工法の手順を示す説明図である。It is explanatory drawing which shows the procedure of the earth retaining wall formation construction method in an Example. 実施例における土留め壁形成工法の手順を示す説明図であり、（ａ）は杭用掘削孔を形成した状態、（ｂ）はＨ形鋼を建て込んだ状態、（ｃ）は連結用掘削孔を形成した状態、（ｄ）は副資材により連結用掘削孔等を充填させた状態をそれぞれ示す。It is an explanatory view showing the procedure of the earth retaining wall forming method in the embodiment, (a) is a state in which a pile excavation hole is formed, (b) is a state in which H-shaped steel is erected, and (c) is excavation for connection. (d) shows the state in which the holes are formed, and the state in which the connection excavation holes and the like are filled with the secondary material. （ａ）はガイド部材の斜視図であり、（ｂ）はガイド部材を取り付けた単軸型スクリュー部材の正面図である。(a) is a perspective view of a guide member, and (b) is a front view of a single screw member to which the guide member is attached. 実施例の羽根部をＨ形鋼のフランジ間に差し入れた状態を示し、（ａ）は斜視図であり、（ｂ）は平面図である。The state which the blade|wing part of the Example was inserted between the flanges of H-shaped steel is shown, (a) is a perspective view, (b) is a top view. 変形例としての土留め壁形成工法を示し、横矢板を嵌め込んだ状態を示す説明図である。It is explanatory drawing which shows the earth retaining wall formation construction method as a modification, and shows the state which inserted the horizontal sheet. 従来の土留め壁形成工法の手順を示し、（ａ）は第一の孔を形成した状態、（ｂ）は第二の孔を形成した状態、（ｃ）は軸がずれて穿孔した状態をそれぞれ示す。The procedure of the conventional earth retaining wall formation method is shown, (a) shows the state where the first hole is formed, (b) shows the state where the second hole is formed, and (c) shows the state where the axis is misaligned and drilled. each shown.

本発明の実施形態を、以下の実施例に従って説明する。 Embodiments of the present invention are described according to the following examples.

土留め壁を形成するべく、穿孔対象部（地面）に穿孔を行う穿孔機械としては、一般的なオーガー１０が採用可能であり、後述するようにオーガー１０は、単軸型スクリュー部材１１（図６参照）を備え、この単軸型スクリュー部材１１は、１個のスクリュー本体１２（図６参照）を備え、その先端にヘッド１３（図６参照）が取り付けられている。 A general auger 10 can be employed as a drilling machine that drills holes in the drilling target portion (ground) in order to form an earth retaining wall. 6), this single screw member 11 has one screw body 12 (see FIG. 6), and a head 13 (see FIG. 6) is attached to the tip thereof.

次に、穿孔手順を説明する。 Next, the drilling procedure will be described.

（工程Ａ：第一穿孔）
土留め壁を形成して連続状に連続壁を設ける際には、図２，図５（ａ）に示すように、まず穿孔対象部に所定間隔を置いて単軸方式で杭用掘削孔２０を一列状に穿つ。 (Step A: first perforation)
When forming a retaining wall and providing a continuous wall in a continuous manner, as shown in FIGS. perforate in a row.

（工程Ｂ：杭建て込み）
次に、図３，図５（ｂ）に示すように、杭用掘削孔２０に杭としてのＨ形鋼３０を建て込む。この際、Ｈ形鋼３０のフランジ３１が差し出される方向は、杭用掘削孔２０の列方向に沿うようにする。 (Process B: Pile erection)
Next, as shown in FIGS. 3 and 5(b), an H-section steel 30 as a pile is erected into the excavated hole 20 for pile. At this time, the direction in which the flange 31 of the H-shaped steel 30 is extended is along the row direction of the pile excavation holes 20 .

（工程Ｃ：第二穿孔）
そして、図４，図５（ｃ）に示すように、隣り合う杭用掘削孔２０間に、単軸方式で連結用掘削孔４０を穿っていく。この際、単軸型スクリュー部材１１には、図６（ｂ）に示すように、ヘッド１３とスクリュー本体１２との間にガイド部材５０が遊嵌されている。 (Step C: second perforation)
Then, as shown in Figs. 4 and 5(c), connecting excavated holes 40 are dug between adjacent pile excavated holes 20 by a uniaxial method. At this time, a guide member 50 is loosely fitted between the head 13 and the screw body 12 of the single shaft type screw member 11, as shown in FIG. 6(b).

ガイド部材５０は、図６（ａ）に示すように、単軸型スクリュー部材１１に遊嵌される筒状の本体部５１を備えている。また、本体部５１からは、板形状の羽根部５２が左右両側にそれぞれ差し出されている。 The guide member 50 has a cylindrical body portion 51 that is loosely fitted to the single-screw member 11, as shown in FIG. 6(a). Further, from the main body portion 51, plate-shaped blade portions 52 are protruded on both left and right sides.

上述の単軸型スクリュー部材１１によって連結用掘削孔４０を穿つ場合には、図７に示すように、予め左右一対で建て込まれたＨ形鋼３０の各フランジ３１間にガイド部材５０の羽根部５２の先端を、遊びを持たせながら各々差し入れた状態とする。これにより、単軸型スクリュー部材１１の軸が左右のＨ形鋼３０の建て込まれた軸と一致して穿孔を行うことができ、意図しない軸ずれ等が発生しない。 When drilling the connecting bore 40 with the above-mentioned single-shaft type screw member 11, as shown in FIG. The ends of the portions 52 are inserted with some play. As a result, the axis of the single-axis screw member 11 can be aligned with the built-in axis of the left and right H-shaped steels 30, and unintended misalignment of the axis can be prevented.

なお、図示をしていないが杭用掘削孔２０には、適宜、セメントミルク等の副資材が充填されて、いわゆるセメント壁として構成される。 Although not shown, the pile excavation hole 20 is appropriately filled with an auxiliary material such as cement milk to form a so-called cement wall.

上記実施例において、各部の寸法形状は適宜自由に選択可能である。また、作業手順は、本発明の主旨を逸脱しない範囲で適宜変更可能である。 In the above embodiments, the dimensions and shape of each part can be freely selected. Moreover, the work procedure can be changed as appropriate without departing from the gist of the present invention.

例えば羽根部５２の差し出し長さを、継ぎ板を設けるなどして変更可能とすることで、種々の作業現場における穿孔作業に適用することができる。 For example, by making it possible to change the protruding length of the blade portion 52 by providing a joint plate or the like, it can be applied to drilling work in various work sites.

また、図８に示すように、セメント壁で土留め壁を構築する以外にも、横矢板７０を用いて親杭横矢板壁を構築するようにしてもよい。 Further, as shown in FIG. 8, instead of constructing an earth retaining wall with a cement wall, a horizontal sheet pile wall may be constructed using horizontal sheet piles 70 .

１０ オーガー（穿孔機械）
１１ 単軸型スクリュー部材
１２ スクリュー本体
１３ ヘッド
２０ 杭用掘削孔
３０ Ｈ形鋼
３１ フランジ
４０ 連結用掘削孔
５０ ガイド部材
５１ 本体部
５２ 羽根部
７０ 横矢板 10 auger (drilling machine)
11 Single shaft type screw member 12 Screw main body 13 Head 20 Pile excavation hole 30 H-shaped steel 31 Flange 40 Connection excavation hole 50 Guide member 51 Body portion 52 Blade portion 70 Horizontal sheet

Claims (2)

土留め壁を形成する穿孔対象部に、所定間隔を置いて単軸方式で杭用掘削孔を一列状に穿つ工程Ａと、
杭としてのＨ形鋼を前記杭用掘削孔に、当該Ｈ形鋼に形成された一対のフランジが前記杭用掘削孔における列方向に沿って差し出されるように建て込む工程Ｂと、
前記隣り合う杭用掘削孔間に、単軸方式で連結用掘削孔を穿つ工程Ｃと、
を含み、さらに、
前記工程Ｃで連結用掘削孔を穿つ際に用いられる単軸型スクリュー部材には、当該単軸型スクリュー部材に遊嵌された、左右両側に差し出された羽根部を有するガイド部材が取り付けられており、
前記工程Ｃは、両隣に配された前記Ｈ形鋼の各一対のフランジ間に前記羽根部を各々差し入れて前記連結用掘削孔を穿つ
ことを特徴とする土留め壁形成工法。 A step A of drilling a line of excavation holes for piles by a uniaxial method at predetermined intervals in a drilling target portion that forms an earth retaining wall;
A step B of erecting an H-section steel as a pile into the pile excavation hole so that a pair of flanges formed on the H-section steel extends along the row direction of the pile excavation hole;
A step C of drilling a connecting bore hole between the adjacent pile bore holes by a uniaxial method;
including, and
The single-screw member used for drilling the connection excavation holes in step C is provided with a guide member having blades protruded on both left and right sides, which is loosely fitted on the single-screw member. and
In the step C, the retaining wall forming method is characterized in that the connecting excavation holes are drilled by inserting the blades between the pair of flanges of the H-shaped steels arranged on both sides. 単軸型スクリュー部材に取り付けられるガイド部材であって、
前記単軸型スクリュー部材に遊嵌される筒状の本体部と、
前記本体部から左右両側に差し出された一対の羽根部と、
を備え、
予め杭として建て込まれた一対のＨ形鋼の間に前記単軸型スクリュー部材を用いて穿孔する際に、前記各Ｈ形鋼に形成されている一対のフランジ間に前記羽根部が各々差し入れられた状態となる
ことを特徴とするガイド部材。 A guide member attached to the single screw member,
a cylindrical main body portion loosely fitted to the single-axis screw member;
a pair of wing portions extended from the main body portion on both left and right sides;
with
When drilling between a pair of H-section steels built in advance as piles using the single-axis screw member, the blades are respectively inserted between a pair of flanges formed on each of the H-section steels. A guide member characterized in that it is in a state where it is held.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7511926B1 (en) 2022-12-27 2024-07-08 株式会社アストリード Earth retaining wall and earth retaining wall construction method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50111821A (en) * 1974-02-12 1975-09-02
JPS52115102U (en) * 1976-02-27 1977-09-01
JPS59106623A (en) * 1982-12-06 1984-06-20 Tomoyoshi Shinohara Underground cutting shaft
JPH0197716A (en) * 1987-10-09 1989-04-17 Mototaka Okuda Screw guide
JPH0718677A (en) * 1993-07-01 1995-01-20 Kengi Kaihatsu Kk Pillar line type underground continuous wall construction method
KR101037774B1 (en) * 2008-09-16 2011-05-27 박길석 Joint structure for diaphragm wall and method of constructing diaphragm wall using the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50111821A (en) * 1974-02-12 1975-09-02
JPS52115102U (en) * 1976-02-27 1977-09-01
JPS59106623A (en) * 1982-12-06 1984-06-20 Tomoyoshi Shinohara Underground cutting shaft
JPH0197716A (en) * 1987-10-09 1989-04-17 Mototaka Okuda Screw guide
JPH0718677A (en) * 1993-07-01 1995-01-20 Kengi Kaihatsu Kk Pillar line type underground continuous wall construction method
KR101037774B1 (en) * 2008-09-16 2011-05-27 박길석 Joint structure for diaphragm wall and method of constructing diaphragm wall using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7511926B1 (en) 2022-12-27 2024-07-08 株式会社アストリード Earth retaining wall and earth retaining wall construction method

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