JP2508568B2 - Mountain retaining wall - Google Patents
Mountain retaining wallInfo
- Publication number
- JP2508568B2 JP2508568B2 JP20893492A JP20893492A JP2508568B2 JP 2508568 B2 JP2508568 B2 JP 2508568B2 JP 20893492 A JP20893492 A JP 20893492A JP 20893492 A JP20893492 A JP 20893492A JP 2508568 B2 JP2508568 B2 JP 2508568B2
- Authority
- JP
- Japan
- Prior art keywords
- retaining wall
- mountain retaining
- steel wire
- mountain
- steel
- 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.)
- Expired - Lifetime
Links
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は地下工事、地盤が軟弱
で地下水位が高い地下工事に好適な山留め壁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall suitable for underground construction and underground construction where the ground is soft and the groundwater level is high.
【０００２】[0002]
【発明が解決しようとする課題】山留め工法は、通常地
下水位が高く、止水性が必要となる場合が多い。このよ
うな場合には、ソイルセメント等からなる柱列体を止水
性の山留め壁となし、これに切梁を架ける支保工形式が
採用されている。支保工形式とすると、地下部の躯体構
築を行なう際に、切梁などが格子状に架けられているの
で、揚重や配筋、コンクリート打設等の作業の能率が著
しく低下する。このため切梁がない自立山留めが必要に
なってくる。In the earth retaining method, the groundwater level is usually high and water stopping is often required. In such a case, a columnar body made of soil cement or the like is used as a waterproofing mountain retaining wall, and a supporting structure in which a girder is hung is adopted. In the case of the support method, when constructing the skeleton in the underground part, since the girders are laid in a grid pattern, the efficiency of work such as lifting, bar arrangement, and concrete placing is significantly reduced. For this reason, it is necessary to have a self-supporting mountain clasp without a beam.
【０００３】しかし、自立山留めは切梁がないので、抵
抗要素は山留め壁のみとなり、土圧による面外の変位が
極めて大となる。軟弱地盤で根切り深さが大きい場合
は、数１０cmにも達する場合がある。However, since the self-supporting earth retaining member has no beam, the resistance element is only the earth retaining wall, and the out-of-plane displacement due to earth pressure becomes extremely large. When the root cutting depth is large on soft ground, it may reach several tens of centimeters.
【０００４】このような時には、単にソイルセメント柱
列体の列数を多くして剛性を高める方法が簡単である
が、敷地の余裕がない時には必要な列数を施工できな
い。また、費用と手間の面でも多大の負担がかかること
になる。In such a case, a method of simply increasing the number of columns of the soil cement columnar body to increase the rigidity is simple, but when the site is insufficient, the required number of columns cannot be constructed. In addition, a great burden is imposed in terms of cost and labor.
【０００５】この発明は上記の事情に鑑みなされたもの
である。その目的は切梁等を用いることなく、簡単な手
段で面外の変位を許容範囲内に維持制御できる山留め壁
を提案するにある。The present invention has been made in view of the above circumstances. Its purpose is to propose a mountain retaining wall that can maintain and control out-of-plane displacement within a permissible range by a simple means without using a cutting beam or the like.
【０００６】[0006]
【課題を解決するための手段】この山留め壁は、山留め
壁を構成する柱列体に挿入した鉄骨芯材の頭部を横架材
で連結し、アウトケーブル方式の緊張材を前記横架材表
面に沿い間につか材を介挿して略弧状に張り渡し、その
両端を地山に定着してプレストレスを導入してなること
を特徴とする。In this mountain retaining wall, the head portion of a steel frame core material inserted into a column body constituting the mountain retaining wall is connected by a horizontal member, and an out-cable type tension member is connected to the horizontal member. It is characterized in that a pre-stress is introduced by fixing both ends to the natural ground by inserting a lumber along the surface and putting it in a substantially arc shape.
【０００７】[0007]
【作用】上記構成からなる山留め壁は、弧状に張り渡
した緊張材の弧状形状および導入したプレストレスの張
力量によって、面外変形を自由に調整し、変位を許容の
範囲に維持することが可能となる。In the mountain retaining wall configured as described above, the out-of-plane deformation can be freely adjusted and the displacement can be maintained within the allowable range depending on the arc shape of the tension material stretched in an arc shape and the tension amount of the prestress introduced. It will be possible.
【０００８】 アウトケーブル方式のアンボンドＰＣ
鋼線などの緊張材を用いるので、設置が容易であり、使
用後簡単に取り外しができる。Out-cable type unbonded PC
Since a tension material such as steel wire is used, it is easy to install and can be easily removed after use.
【０００９】 緊張材は山留め壁の頭部を頭つなぎし
た横架材に沿って張渡すので、地下工事施工の障害とは
ならず、切梁支保工タイプに比べ、施工能率を格段に向
上できる。Since the tension member is stretched along the horizontal member that connects the heads of the mountain retaining walls, it does not become an obstacle to the underground construction work, and the construction efficiency can be significantly improved as compared with the truss support type. .
【００１０】 軟弱地盤で根切り深さが大きい時など
は、切梁支保工タイプに比べ、簡単かつ、確実に変位制
御が可能となる。When the root cutting depth is large on soft ground, displacement control can be performed more easily and more reliably than the truss support type.
【００１１】[0011]
【実施例】図１，２は、地山１にＨ形鋼２の芯材を挿入
したソイルセメント柱列体３をつくり構築した平面視方
形の山留め壁を示す。なお、図１で４は根切り底であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show an earth retaining wall of a square shape in plan view, which is constructed by constructing a soil cement columnar body 3 in which a core material of H-shaped steel 2 is inserted into a ground 1. In addition, 4 is a root cutting bottom in FIG.
【００１２】この山留め壁は芯材の複数のＨ形鋼２の頭
部の壁表面側に溝形鋼５の横架材を固着連結して頭つな
ぎする。この溝形鋼５の表面に沿い、アウトケーブル方
式のアンボンドＰＣ鋼線６を配置する。この実施例で
は、山留め壁の平面視方形の長辺部分は、中央で分割
し、２本のＰＣ鋼線６を用いた。In this mountain retaining wall, a horizontal member of the channel steel 5 is fixedly connected to the wall surface side of the heads of the plurality of H-shaped steels 2 of the core material to connect the heads. An out-cable type unbonded PC steel wire 6 is arranged along the surface of the channel steel 5. In this example, the rectangular long side portion of the mountain retaining wall was divided at the center and two PC steel wires 6 were used.
【００１３】ＰＣ鋼線６の両端は長辺においては山留め
壁の端部および辺中央部で定着し、短辺においては両端
を端部で定着する。ＰＣ鋼線６と溝形鋼５との間にはつ
か材７を介挿し、ＰＣ鋼線６を略弧状に張り渡す。Both ends of the PC steel wire 6 are fixed at the ends of the mountain retaining wall and the center of the side on the long side, and at both ends on the short side. A filler material 7 is inserted between the PC steel wire 6 and the channel steel 5, and the PC steel wire 6 is stretched in a substantially arc shape.
【００１４】山留め壁の長辺中央部外側に３本のソイル
セメントの反力柱８を建込み、柱列体３および反力柱８
の頭部にコンクリートを打設して中間定着ブロック９を
つくり、端部も頭部にコンクリートを打設して端部定着
ブロック１０をつくる。Three reaction cement columns 8 of soil cement are built outside the central portion of the long side of the mountain retaining wall to form a column array 3 and a reaction column 8.
The intermediate fixing block 9 is made by pouring concrete on the head of the head, and the end fixing block 10 is made by pouring concrete on the end of the head as well.
【００１５】図３、図４に示すようにＰＣ鋼線６の端部
にはそれぞれ定着具１１を取付け、端部あるいは中間定
着ブロック１０，９を反力点とし、他端から引張り、所
定のプレストレスを導入する。As shown in FIGS. 3 and 4, fixing tools 11 are attached to the ends of the PC steel wire 6, respectively, and the ends or the intermediate fixing blocks 10 and 9 are used as reaction points, and they are pulled from the other end to give a predetermined pre-fix. Introduce stress.
【００１６】端部定着ブロック１０は直交する２列の柱
列体３が互いにプレストレスの反力を打消し合い、中間
定着ブロック９は反力柱と一体となり、プレストレスの
反力点として機能し、ＰＣ鋼線端を地山に対し強固に定
着できる。In the end fixing block 10, two column arrays 3 of columns orthogonal to each other cancel out the prestress reaction force, and the intermediate fixing block 9 is integrated with the reaction column to function as a prestress reaction force point. , PC steel wire ends can be firmly fixed to the ground.
【００１７】この実施例では幅が長い山留め壁長辺部分
は、２分割し、２本のＰＣ鋼線を用いたが、幅が短い山
留め壁はその必要はない。幅が長い山留め壁に大きな面
外変位抑制力を付与しようとすると、ＰＣ鋼線の弧状の
曲率半径を小としなければならず、ＰＣ鋼線の中央部の
張出が大きくなり好ましくない。In this embodiment, the long side portion of the mountain retaining wall having a long width is divided into two and two PC steel wires are used, but the mountain retaining wall having a short width is not necessary. In order to apply a large out-of-plane displacement suppressing force to the mountain retaining wall having a long width, the radius of curvature of the PC steel wire in the arc shape must be made small, which is not preferable because the central portion of the PC steel wire is overhanged.
【００１８】[0018]
【発明の効果】この発明は以上の通りであり、次の効果
を奏する。As described above, the present invention has the following effects.
【００１９】 この山留め壁は切梁が不要なので地下
工事の施工能率を著しく向上できる。Since this mountain retaining wall does not require a crossbeam, the construction efficiency of underground construction can be significantly improved.
【００２０】 アウトケーブル方式のＰＣ鋼線等を用
い自立壁とするので設置、撤去が容易で、低コスト化を
達成できる。Since an out-cable type PC steel wire or the like is used as a self-supporting wall, installation and removal are easy, and cost reduction can be achieved.
【００２１】 狭い敷地の山留め壁にも適用できる。It can also be applied to a retaining wall on a small site.
【図１】実施例の山留め壁の縦断面図である。FIG. 1 is a vertical cross-sectional view of a mountain retaining wall according to an embodiment.
【図２】実施例の山留め壁の平面図である。FIG. 2 is a plan view of the mountain retaining wall of the embodiment.
【図３】山留め壁の端部定着部の一部断面で示す平面図
である。FIG. 3 is a plan view showing a partial cross section of an end fixing portion of the mountain retaining wall.
【図４】山留め壁の中間定着部の一部断面で示す平面図
である。FIG. 4 is a plan view showing a partial cross section of an intermediate fixing portion of the mountain retaining wall.
１…地山、２…Ｈ形鋼、３…柱列体、４…根切り底、５
…溝形鋼、６…アンボンドＰＣ鋼線、７…つか材、８…
反力柱、９…中間定着ブロック、１０…端部定着ブロッ
ク、１１…定着具。1 ... Ground, 2 ... H-section steel, 3 ... Column body, 4 ... Root cutting bottom, 5
… Channel steel, 6… Unbonded PC steel wire, 7… Heating material, 8…
Reaction force column, 9 ... Intermediate fixing block, 10 ... End fixing block, 11 ... Fixing tool.
Claims (1)
骨芯材の頭部を横架材で連結し、アウトケーブル方式の
緊張材を前記横架材表面に沿い、間につか材を介挿して
略弧状に張り渡し、その両端を地山に定着してプレスト
レスを導入してなることを特徴とする山留め壁。1. A head member of a steel core material inserted into a column body constituting a mountain retaining wall is connected by a horizontal member, and an out-cable type tension member is provided along the surface of the horizontal member with an interposing material. A mountain retaining wall characterized by being inserted and stretched in a substantially arc shape, with both ends fixed to the ground and prestressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20893492A JP2508568B2 (en) | 1992-08-05 | 1992-08-05 | Mountain retaining wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20893492A JP2508568B2 (en) | 1992-08-05 | 1992-08-05 | Mountain retaining wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0657741A JPH0657741A (en) | 1994-03-01 |
| JP2508568B2 true JP2508568B2 (en) | 1996-06-19 |
Family
ID=16564556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20893492A Expired - Lifetime JP2508568B2 (en) | 1992-08-05 | 1992-08-05 | Mountain retaining wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508568B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020096596A (en) * | 2001-06-21 | 2002-12-31 | 황문삼 | construction method for defending earth using prestressed wale used therefor |
| KR100476839B1 (en) * | 2001-09-28 | 2005-03-18 | 최춘식 | Construction method for installing concrete underground structures |
| KR20040031451A (en) * | 2002-10-07 | 2004-04-13 | 한만엽 | Prestressed scaffolding method |
| WO2004031510A2 (en) | 2002-10-07 | 2004-04-15 | Man-Yop Han | Innovative prestressed scaffolding system |
| CN104652447B (en) * | 2014-11-14 | 2016-05-25 | 北京地圣科创建设工程有限公司 | The sustainable cladding plate that applies counter-force is used prestressed wale temporarily |
| KR102444554B1 (en) | 2020-03-20 | 2022-09-19 | (주)토네이도건설 | Prestressed wale and it's construction method |
| CN111335328B (en) * | 2020-03-31 | 2024-05-17 | 江苏东合南岩土科技股份有限公司 | Multimodal prestress foundation pit supporting structure and construction method thereof |
| CN113235613B (en) * | 2021-05-24 | 2024-04-05 | 中国铁路设计集团有限公司 | Method for excavating and supporting newly-built foundation pit by utilizing adjacent existing guard piles |
-
1992
- 1992-08-05 JP JP20893492A patent/JP2508568B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0657741A (en) | 1994-03-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960220 |