JP5356901B2 - Precast parent pile for retaining and its formation method - Google Patents

Precast parent pile for retaining and its formation method Download PDF

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JP5356901B2
JP5356901B2 JP2009101740A JP2009101740A JP5356901B2 JP 5356901 B2 JP5356901 B2 JP 5356901B2 JP 2009101740 A JP2009101740 A JP 2009101740A JP 2009101740 A JP2009101740 A JP 2009101740A JP 5356901 B2 JP5356901 B2 JP 5356901B2
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pile
precast
mountain
recess
retaining
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浩明 尾河
良雄 中村
恵理子 小畑
徹 守田
良介 福田
哲也 出野
理博 濱田
尚久 加戸
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Toda Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that manufacturing cost of a conventional precast soldier beam for earth retaining is increased. <P>SOLUTION: A soldier beam 1 for earth retaining is form of precast concrete. Its skeleton has a cross-sectional shape of a rectangle while L-shaped steel materials 2 are fixed to both ends of the side of the soldier beam 1. One side flat portion of the L-shaped steel material is horizontally projected from the side of the skeleton to form a locking portion 2a for a horizontal sheathing 3. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、地下躯体を構築する際の、地盤の崩落を防ぐ山留め用の親杭とその形成方法に関するものである。   TECHNICAL FIELD The present invention relates to a pile for retaining a mountain that prevents collapse of the ground when constructing an underground frame and a method for forming the same.

従来、山留め用の親杭は、Ｈ形鋼が使用され、図５に示すように、従来例１として地盤に所定の間隔で前記Ｈ形鋼２１を打ち込み、掘削をしながら両Ｈ形鋼２１，２１間に木製等の横矢板２２をはめ込んで、掘削の進捗に従って腹起こしに支保工としての切り梁を架設していくものである。また、従来例２として特許文献１に記載のように、鉄骨埋め込み形ハーフプレキャストコンクリート部材であって、図６に示すように、前記鉄骨２３ａを親杭とし前記プレキャストコンクリート部材２３ｂを横矢板とする外壁単位パネル２３を構築し、これを掘削した溝に建込みして順次連結して、山留めとするものが知られている。   Conventionally, H-shaped steel is used as the pile for the pile, and as shown in FIG. 5, the H-shaped steel 21 is driven into the ground at a predetermined interval as conventional example 1, and both H-shaped steels 21 are excavated. , 21 is fitted with a horizontal sheet pile 22 such as a wooden, and a cut beam as a support work is erected in accordance with the progress of excavation. Further, as disclosed in Patent Document 1 as Conventional Example 2, it is a steel-embedded half precast concrete member, and as shown in FIG. 6, the steel frame 23a is used as a parent pile and the precast concrete member 23b is used as a horizontal sheet pile. It is known that an outer wall unit panel 23 is constructed, and this is built in a dug groove and sequentially connected to form a mountain stop.

特開平０９−２６８５８３号公報Japanese Patent Application Laid-Open No. 09-265883

しかし、従来の親杭は、いずれもＨ形鋼を使用するものであり、鋼材の価格高騰の煽りを受けてコストが嵩んでいる。親杭のコスト低減が課題となっている。本発明に係る山留め用プレキャスト親杭とその形成方法は、このような課題を解決するために提案されたものである。   However, all of the conventional parent piles use H-shaped steel, and the cost increases due to the rising price of steel materials. Cost reduction of the parent pile is an issue. The precast main pile for mountain retaining according to the present invention and the method for forming the same are proposed in order to solve such problems.

本発明に係る山留め用プレキャスト親杭の形成方法の上記課題を解決して目的を達成するための要旨は、山留め用の親杭が、工場若しくは現場のサイトにおいて、横矢板の端部を遊嵌させる凹部若しくは係止させる係止部を躯体の両脇に形成した型枠にコンクリートを打設して形成し、
前記横矢板の端部を遊嵌させる凹部を形成する場合に、地山側となる躯体の下部の外周面は、円筒の樹脂管を略半分に分割した半円形樹脂型枠で形成されていることである。 The gist for solving the above-mentioned problems of the method for forming a precast parent pile for mountain retaining according to the present invention is to achieve the purpose of the parent pile for mountain retaining loosely at the end of the side sheet pile at a factory or site site. The concrete to be formed on the formwork formed on both sides of the housing with the recessed portion to be locked or the locking portion to be locked ,
In the case of forming a recess for loosely fitting the end of the horizontal sheet pile, the outer peripheral surface of the lower part of the frame on the ground mountain side is formed of a semicircular resin mold frame obtained by dividing a cylindrical resin tube into approximately half. It is.

本発明に係る山留め用プレキャスト親杭の形成方法の上記課題を解決して目的を達成するための要旨は、プレキャストコンクリート製であって、その躯体の断面形状が、中心部から根切り側では横矢板の端部を遊嵌させる凹部を有したＴ字形で、中心部から地山側では前記凹部の片側壁面を形成する半円形の端部にして形成されていることである。 SUMMARY To achieve the object by solving the above problems of the method of forming earth retaining for precast Shinkui according to the present invention is made of precast concrete, the sectional shape of the building frame is horizontal in Excavation side from the center It is a T-shape having a recess for loosely fitting the end of the sheet pile, and is formed as a semicircular end that forms one side wall surface of the recess from the center to the ground.

本発明の山留め用プレキャスト親杭とその形成方法によれば、親杭をプレキャストコンクリート（以下、ＰＣ）化することで価格が高騰しているＨ形鋼に代わって、コスト低減が図られるとともに、剛性の向上が見込まれる。
また、ＰＣ親杭の断面形状において、略Ｔ字形にしたり片側を半円形状にしたりすることで、無駄なコンクリート量を削減してさらなるコストダウンを図ることができる。
このＰＣ親杭を形成する場合に、現場のサイトで簡易に形成できて、しかも、その職種の変わらない人手で形成できるようになるので、異なる職種の作業員が入り交じって工期も長くなったりせず、作業の段取りが効率良く施工できるようになる。 According to the precast parent pile for mountain retaining of the present invention and its formation method, in place of the H-shaped steel whose price is rising by converting the parent pile to precast concrete (hereinafter referred to as PC), cost reduction is achieved. Improvement in rigidity is expected.
Moreover, in the cross-sectional shape of the PC main pile, it is possible to further reduce the cost by reducing the amount of wasted concrete by making it substantially T-shaped or semicircular on one side.
When this PC main pile is formed, it can be easily formed at the site of the site, and it can be formed manually with the same job type, so the work period will be increased due to the mixing of workers of different job types. Without setup, work can be set up efficiently.

本発明に係る山留め用プレキャスト親杭１の、各種断面形状を示す横断面図（Ａ）〜（Ｄ）である。It is a cross-sectional view (A)-(D) which shows various cross-sectional shapes of the precast main pile 1 for mountain retaining concerning this invention. 同本発明の山留め用プレキャスト親杭１を形成する型枠の断面図である。It is sectional drawing of the formwork which forms the precast main pile 1 for mountain retaining of the same invention. 同本発明の山留め用プレキャスト親杭１を形成する型枠の断面図である。It is sectional drawing of the formwork which forms the precast main pile 1 for mountain retaining of the same invention. 同本発明の山留め用プレキャスト親杭１の使用状態を示す断面図（Ａ），（Ｂ）である。It is sectional drawing (A) and (B) which show the use condition of the precast main pile 1 for the mountain retaining of the same invention. 従来例１に係る山留め用親杭の使用状態を示す平断面図（Ａ）と、縦断面図（Ｂ）とである。It is the plane sectional view (A) which shows the use condition of the main pile for mountain retaining concerning the prior art example 1, and a longitudinal cross-sectional view (B). 従来例２に係る山留め用親杭の使用状態を示す平断面図（Ａ）と、Ａ−Ａ線に沿った縦断面図（Ｂ）とである。They are the plane sectional view (A) which shows the use condition of the main pile for mountain retaining concerning the prior art example 2, and the longitudinal cross-sectional view (B) along the AA line.

本発明に係る山留め用プレキャスト親杭は、工場若しくは現場のサイトにて、型枠を形成してＰＣ化するものである。   The precast main pile for mountain retaining according to the present invention is formed into a PC by forming a formwork at a factory or on-site site.

本発明のプレキャスト親杭１ａは、図１（Ａ）に示すように、プレキャストコンクリート製であって、根入れの長さが約３ｍ程度であって、その躯体の断面形状が、矩形状、例えば地盤側から根切りへの縦方向に長い長方形であるとともに、その側面の両端にＬ字形鋼材２が一体にして固着され、該Ｌ字形鋼材２の片側平板部が前記躯体の前端面１ｅに略揃えて配設されて横矢板３の係止部２ａになっている。   As shown in FIG. 1 (A), the precast main pile 1a of the present invention is made of precast concrete, has a root insertion length of about 3 m, and has a rectangular cross section, for example, It is a rectangle that is long in the vertical direction from the ground side to the root cutting, and the L-shaped steel material 2 is integrally fixed to both ends of the side surface, and the one-side flat plate portion of the L-shaped steel material 2 is substantially on the front end surface 1e of the casing. It arrange | positions so that it may be arrange | positioned and it becomes the latching | locking part 2a of the horizontal sheet pile 3. FIG.

前記係止部２ａは、図２に示すように、片方の平板部２ｂの外側面を型枠４の中に配設される鉄筋５の一部５ａに固着されるとともに、他方の平板部２ｃを前記型枠４の外側に張り出させれたＬ字形鋼材２の、前記他方の平板部２ｃの内側面である。   As shown in FIG. 2, the locking portion 2a has an outer surface of one flat plate portion 2b fixed to a part 5a of a reinforcing bar 5 disposed in the mold 4, and the other flat plate portion 2c. Is the inner surface of the other flat plate portion 2c of the L-shaped steel material 2 projecting outward from the mold 4.

また、図１（Ｂ）に示すように、プレキャスト親杭１ｂは、プレキャストコンクリート製であって、その躯体の断面形状が、略Ｔ字形であるとともに根切り側の横矢板３受け部がＴ字の首部であって、そこから地山側の端面に向かって躯体の幅が広くなるようにテーパ状１ｆに形成されてなる。   Further, as shown in FIG. 1B, the precast main pile 1b is made of precast concrete, and the cross-sectional shape of the frame is substantially T-shaped, and the side sheet pile 3 receiving portion on the root cutting side is T-shaped. And is formed in a tapered shape 1f so that the width of the housing becomes wider toward the end face on the natural mountain side.

更に、図１（Ｃ）に示すように、山留め用の親杭１ｃが、工場若しくは現場のサイトにおいて、横矢板３の端部を遊嵌させる凹部１ｇを躯体の両脇に形成した型枠にコンクリートを打設して形成される。   Further, as shown in FIG. 1 (C), the pile pile 1c is formed in a formwork in which recesses 1g for loosely fitting the end portions of the lateral sheet piles 3 are formed on both sides of the frame at the site of the factory or site. It is formed by placing concrete.

このほか、山留め用のプレキャスト親杭１ｄとして、図１（Ｄ）に示すように、プレキャストコンクリート製であって、その躯体の断面形状が、中心部から根切り側では横矢板の端部を遊嵌させる凹部１ｇを有したＴ字形で、中心部から地山側では前記凹部１ｇの片側壁面を形成する半円形の端部にして形成されているものである。前記横矢板３の端部を遊嵌させる凹部１ｇを形成する場合に、地山側となる躯体の下部の外周面１ｈは、半円形状に形成されているものである。   In addition, as shown in FIG. 1 (D), as a precast main pile 1d for retaining a mountain, it is made of precast concrete, and the cross-sectional shape of the frame is free to play the end portion of the horizontal sheet pile from the center to the root cutting side. It is a T-shape having a recessed portion 1g to be fitted, and is formed as a semicircular end portion that forms one side wall surface of the recessed portion 1g from the center to the natural ground side. When forming the recessed part 1g which loosely fits the edge part of the said horizontal sheet pile 3, the outer peripheral surface 1h of the lower part of the housing used as a natural mountain side is formed in semicircle shape.

これは、図３に示すように、建物の建築現場において多用される円筒の樹脂管、例えば、直径φ３５０ｍｍ程度の塩化ビニール管を略半分に分割した半円形樹脂型枠６で、前記半円形状の外周面１ｈが形成される。これにより、型枠７を構成する他の金属製プレート７ａや補強プレート７ｂとともに、半円形樹脂型枠６を転用することができる。また、半円形にするのであるから、矩形状に形成する場合に比べて、使用するコンクリートの量も減らすことができてコスト低減となる。なお、地盤側の躯体を半円形状にできるのは、根切り側の躯体に比べて地盤による土圧が小さいからである。   As shown in FIG. 3, this is a semi-circular resin mold 6 in which a cylindrical resin tube, for example, a vinyl chloride tube having a diameter of about 350 mm, which is frequently used in a building site of a building, is divided into approximately half. The outer peripheral surface 1h is formed. Thereby, the semicircular resin mold 6 can be diverted together with the other metal plate 7a and the reinforcing plate 7b constituting the mold 7. Moreover, since it is made semicircular, the amount of concrete to be used can be reduced as compared with the case of forming it in a rectangular shape, thereby reducing the cost. The ground side can be made semicircular because the earth pressure by the ground is smaller than the root cutting side.

このような親杭１（１ａ〜１ｄ）をＰＣ化して形成し、図４（Ａ）に示すように、地盤にオーガなどで所要の直径の孔８を掘削し、そこに親杭１をクレーンで吊り上げて建込みする。そして、バケットなどにより地盤を根切りしていきながら、前記親杭１，１間に横矢板３を架設し、腹起こしを横架してそれを切り梁で支持させながら、掘り進めていくものである。   Such a parent pile 1 (1a to 1d) is formed as a PC, and as shown in FIG. 4A, a hole 8 having a required diameter is excavated in the ground with an auger or the like, and the parent pile 1 is craned there. Lift it up and build it up. And, while digging the ground with a bucket, etc., laying a horizontal sheet pile 3 between the parent piles 1 and 1 It is.

また、図４（Ｂ）に示すように、他の実施例として、ＰＣ化した親杭１を、地下躯体９構築用に片方の型枠として兼用し、コンクリートを打設して一体化させて、合成壁とすることもできる。これにより、地下躯体９の片側型枠を別に作る必要が無くなり、工期の短縮となってコスト低減となる。   Moreover, as shown in FIG. 4 (B), as another embodiment, the master pile 1 that has been made into a PC is also used as one formwork for construction of the underground frame 9, and concrete is cast and integrated. It can also be a synthetic wall. Thereby, it is not necessary to separately make a one-sided formwork of the underground frame 9, shortening the construction period and reducing the cost.

本発明の親杭１は、山留め用に限らず擁壁や法面等にも適用することができるものである。   The parent pile 1 of the present invention can be applied not only to retaining a mountain but also to a retaining wall or a slope.

１（１ａ〜１ｄ） 山留め用プレキャスト親杭、
１ｅ 前端面、 １ｆ テーパ状、
１ｇ 凹部、 １ｈ 外周面、
２ Ｌ字形鋼材、 ２ａ 係止部、
２ｂ 片方の平板部、 ２ｃ 他方の平板部、
３ 横矢板、
４ 型枠、
５ 鉄筋、 ５ａ 鉄筋の一部、
６ 半円形樹脂型枠、
７ 型枠、 ７ａ 金属製プレート、
７ｂ 補強プレート、
８ 孔、
９ 地下躯体、
２１ Ｈ形鋼、
２２ 横矢板、
２３ 外壁単位パネル、 ２３ａ 鉄骨、
２３ｂ プレキャストコンクリート部材。 1 (1a-1d) Precast parent pile for mountain fastening,
1e front end face, 1f taper,
1g recess, 1h outer peripheral surface,
2 L-shaped steel, 2a Locking part,
2b one flat plate portion, 2c the other flat plate portion,
3 sheet pile,
4 formwork,
5 Rebar, 5a Part of the rebar,
6 Semi-circular resin mold,
7 Formwork, 7a Metal plate,
7b reinforcement plate,
8 holes,
9 Underground building,
21 H-section steel,
22
23 outer wall unit panel, 23a steel frame,
23b Precast concrete member.

Claims (2)

山留め用の親杭が、工場若しくは現場のサイトにおいて、横矢板の端部を遊嵌させる凹部若しくは係止させる係止部を躯体の両脇に形成した型枠にコンクリートを打設して形成し、
前記横矢板の端部を遊嵌させる凹部を形成する場合に、地山側となる躯体の下部の外周面は、円筒の樹脂管を略半分に分割した半円形樹脂型枠で形成されていること、
を特徴とする山留め用プレキャスト親杭の形成方法。 Parent pile for earth retaining is, in a factory or the field site, concrete was formed by Da設a locking portion for locked recess or engagement is loosely fitted the ends of the transverse sheet pile into a mold formed on both sides of the skeleton ,
In the case of forming a recess for loosely fitting the end of the horizontal sheet pile, the outer peripheral surface of the lower part of the frame on the ground mountain side is formed of a semicircular resin mold frame obtained by dividing a cylindrical resin tube into approximately half. ,
A method for forming a precast parent pile for mountain fastening. プレキャストコンクリート製であって、その躯体の断面形状が、中心部から根切り側では横矢板の端部を遊嵌させる凹部を有したＴ字形で、中心部から地山側では前記凹部の片側壁面を形成する半円形の端部にして形成されていること、
を特徴とする山留め用プレキャスト親杭。 It is made of precast concrete, and the cross-sectional shape of the frame is T-shaped with a recess that loosely fits the end of the lateral sheet pile on the root cutting side from the center, and the one side wall surface of the recess on the ground mountain side from the center. Be formed with a semicircular end to form,
Precast parent pile for mountain fastening.
JP2009101740A 2009-04-20 2009-04-20 Precast parent pile for retaining and its formation method Expired - Fee Related JP5356901B2 (en)

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JPH0447021A (en) * 1990-06-13 1992-02-17 Toda Constr Co Ltd Construction method for sheathing guide pile
JP2733722B2 (en) * 1991-12-26 1998-03-30 株式会社フジタ Construction method of deep foundation pile type retaining wall
JPH0995938A (en) * 1995-10-02 1997-04-08 Geostr Corp Master pile lateral sheet pile and its execution method
JP3032778B2 (en) * 1996-03-12 2000-04-17 日本政策投資銀行 Reinforced soil retaining wall method
JP3101762B2 (en) * 1998-10-23 2000-10-23 鹿島建設株式会社 Simple mountain retaining method
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JP2007039955A (en) * 2005-08-02 2007-02-15 Mitani Sekisan Co Ltd Ready-made pile and foundation pile structure
JP3133615U (en) * 2007-04-26 2007-07-19 吉川 富久 Exterior wall concrete formwork panel
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