JPH0726556A - Joint structure for underground continuous wall - Google Patents
Joint structure for underground continuous wallInfo
- Publication number
- JPH0726556A JPH0726556A JP5170696A JP17069693A JPH0726556A JP H0726556 A JPH0726556 A JP H0726556A JP 5170696 A JP5170696 A JP 5170696A JP 17069693 A JP17069693 A JP 17069693A JP H0726556 A JPH0726556 A JP H0726556A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing bar
- horizontal
- reinforcement
- basket
- cage
- 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
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、地中連続壁の継手構造
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground joint wall joint structure.
【0002】[0002]
【従来の技術】鉄筋コンクリート製の連続パネルとして
造成される地中連続壁は、周知のごとく、横長の掘削溝
を地盤に形成してこの掘削溝内に鉄筋カゴを挿入し、次
いで、コンクリートを掘削溝内に打設して鉄筋コンクリ
ート製の先行パネルを地中に造成し、この鉄筋コンクリ
ート製の単独パネルを単位エレメントとしてこれを順次
接続していくものである。2. Description of the Related Art As is well known, a continuous underground wall constructed as a continuous panel made of reinforced concrete has a laterally long excavation groove formed in the ground, a reinforcing steel basket is inserted into the excavation groove, and then concrete is excavated. A reinforced concrete preceding panel is formed in the groove by placing it in the groove, and this reinforced concrete single panel is used as a unit element and sequentially connected.
【0003】図4はこのような地中連続壁の施工で重ね
継手工法を採用する場合を示したもので、先行エレメン
ト1は後端部に鉄板型枠としての仕切板3を組み込んだ
鉄筋カゴ4の該仕切板3から先に水平鉄筋5を突出させ
ている。先行エレメント1側で打設するコンクリート6
はこの仕切板3で止められる。FIG. 4 shows a case where the lap joint method is adopted in the construction of such an underground continuous wall, and the preceding element 1 has a reinforcing bar basket in which a partition plate 3 as an iron plate frame is incorporated at the rear end. The horizontal reinforcing bar 5 is projected from the partition plate 3 of 4. Concrete 6 placed on the side of the preceding element 1
Is stopped by this partition plate 3.
【0004】後行エレメント2は先端部を水平鉄筋7と
した鉄筋カゴ8を配設するが、この水平鉄筋7は前記先
行エレメント1側に水平鉄筋5内に入り込むように巾狭
のものとする。The trailing element 2 is provided with a rebar cage 8 having a horizontal rebar 7 at its tip. The horizontal rebar 7 is narrow so that it enters the horizontal rebar 5 on the side of the preceding element 1. .
【0005】先行エレメント1のコンクリート6を打設
した後で、後行エレメント2の鉄筋カゴ8を掘削溝9内
に配設し、図示は省略するが後行エレメント2のコンク
リートを打設すれば、ラップする水平鉄筋5と水平鉄筋
7で重ね継手による接合がなされる。After the concrete 6 of the preceding element 1 is poured, the reinforcing bar basket 8 of the trailing element 2 is arranged in the excavation groove 9, and although not shown, the concrete of the trailing element 2 is poured. The horizontal reinforcing bars 5 and 7 to be wrapped are joined by a lap joint.
【0006】[0006]
【発明が解決しようとする課題】前記図4に示す従来の
接合方法は、鉄筋カゴ相互の接合として水平鉄筋5と水
平鉄筋7とは施工上水平方向に離れており、重ね継手筋
間を横切るような補強ができない。その結果、面外の曲
げ応力βを受けると図4のαに示すように後行エレメン
ト2側のコンクリートに水平筋による重ね継手部に沿う
割裂ひび割れが瞬時に発生して水平鉄筋5をはじけさ
せ、耐力が低下してしまうおそれがある。According to the conventional joining method shown in FIG. 4, the horizontal rebar 5 and the horizontal rebar 7 are separated from each other in the horizontal direction for the purpose of joining the reinforcing bar baskets to each other and cross the lap joint bars. It cannot be reinforced like this. As a result, when an out-of-plane bending stress β is applied, as shown by α in FIG. 4, splitting cracks along the lap joint portion due to the horizontal streak instantly occur in the concrete on the side of the trailing element 2 and the horizontal rebar 5 is repelled. , The yield strength may decrease.
【0007】本発明の目的は前記従来例の不都合を解消
し、先行エレメントの鉄筋カゴの水平鉄筋に後行エレメ
ントの鉄筋カゴの水平鉄筋を重ね継手で配設する場合
に、割裂破壊を防止できる地中連続壁の継手構造を提供
することにある。The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, and to prevent split fracture when the horizontal reinforcing bar of the trailing element reinforcing bar basket is arranged on the horizontal reinforcing bar of the preceding element reinforcing bar by a lap joint. It is to provide a joint structure for an underground wall.
【0008】[0008]
【課題を解決するための手段】本発明は前記目的を達成
するため、先行エレメントの鉄筋カゴの水平鉄筋と後行
エレメントの鉄筋カゴの水平鉄筋を重ね継手で接合する
場合において、先行エレメントの鉄筋カゴの引張り側の
水平鉄筋を直状としてこれの先端に縦方向の平鋼または
L形鋼からなるガイド金物を取付け、後行エレメントの
鉄筋カゴの引張り側の水平鉄筋も直状としてこれの先端
に縦方向の平鋼からなるガイド金物を取付け、前記ガイ
ド金物に沿って先行エレメントの鉄筋カゴの水平鉄筋に
離れないように重ねることを要旨とするものである。In order to achieve the above object, the present invention provides a method of connecting a horizontal reinforcing bar of a preceding element reinforcing bar cage and a horizontal reinforcing bar of a trailing element reinforcing bar cage by a lap joint. The horizontal reinforcing bar on the pulling side of the basket is made straight and a guide hardware made of vertical flat steel or L-shaped steel is attached to the tip of this, and the horizontal reinforcing bar on the pulling side of the reinforcing bar of the trailing element is also straight and its tip The gist of the present invention is to attach a guide metal member made of flat steel in the vertical direction to the guide metal member so that the guide metal member is superposed along the guide metal member so as not to separate from the horizontal reinforcing bar of the reinforcing bar basket of the preceding element.
【0009】[0009]
【作用】本発明によれば、少なくとも引張り側では先行
エレメントの鉄筋カゴ端の水平鉄筋に後行エレメントの
鉄筋カゴの水平鉄筋が離れずに重ねられるので、面外方
向の曲げを受けた時に引張り側コンクリートに生じるひ
び割れは、これら水平鉄筋間に進展しないようにするこ
とができる。その結果、かぶりコンクリート側にある水
平鉄筋ははじけないので鉛直継手部の耐力は低下しな
い。According to the present invention, at least on the pulling side, the horizontal rebar of the trailing rebar cage of the trailing element is superposed on the horizontal rebar of the leading bar cage of the preceding element without separating. Cracks in the side concrete can be prevented from developing between these horizontal reinforcing bars. As a result, the horizontal rebar on the cover concrete side does not repel and the vertical joint strength does not decrease.
【0010】また、先行エレメントの鉄筋カゴの引張り
側の水平鉄筋と後行エレメントの鉄筋カゴの引張り側の
水平鉄筋とはともに直状であるが、後行エレメントの水
平鉄筋は吊り下ろす際にこのガイド金物に沿って先行エ
レメントの鉄筋カゴの水平鉄筋に簡単に近づけて重ねる
ことができる。Further, both the horizontal reinforcing bars on the pulling side of the reinforcing bar basket of the preceding element and the horizontal reinforcing bars on the pulling side of the reinforcing bar basket of the trailing element are straight, but the horizontal reinforcing bars of the trailing element are It can be easily approached and overlapped with the horizontal reinforcing bar of the reinforcing bar basket of the preceding element along the guide hardware.
【0011】[0011]
【実施例】以下、図面について本発明の実施例を詳細に
説明する。図1は本発明の地中連続壁の継手構造の第1
実施例を示す平面図、図2は同上側面図で、前記従来例
を示す図4と同一構成要素には同一参照符号を付したも
のである。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is the first of the joint structure of the underground wall of the present invention
2 is a plan view showing an embodiment, and FIG. 2 is a side view showing the same, in which the same components as those in FIG. 4 showing the conventional example are designated by the same reference numerals.
【0012】図中5は先行エレメント1側の鉄筋カゴ4
の水平鉄筋、7は後行エレメント2側の鉄筋カゴ8の先
端部の水平鉄筋で、これら水平鉄筋5,7は重ね継手を
なすものとして少なくとも引張り側はいずれも直状とし
た。In the figure, 5 is a reinforcing bar basket 4 on the side of the preceding element 1.
And 7 are horizontal reinforcing bars at the tip of the reinforcing bar basket 8 on the trailing element 2 side. These horizontal reinforcing bars 5 and 7 are lap joints, and at least the pulling side is straight.
【0013】また、先行エレメント1側の鉄筋カゴ4の
水平鉄筋5には縦方向のL形鋼11または平鋼からなるガ
イド金物を取付けた。後行エレメント2側の鉄筋カゴ8
の水平鉄筋7には縦方向の平鋼10からなるガイド金物を
取付けた。A guide metal member made of L-shaped steel 11 or flat steel in the vertical direction is attached to the horizontal reinforcing bar 5 of the reinforcing bar basket 4 on the side of the preceding element 1. Reinforcing bar cage 8 on the trailing element 2 side
A guide metal fitting made of a vertical flat steel 10 was attached to the horizontal rebar 7.
【0014】なお、後行エレメント2の鉄筋カゴ8の引
張り側の水平鉄筋7と並ぶ反対側の水平鉄筋7′は、こ
れを内側に向けて曲成して前記水平鉄筋5間内に入り込
むように相互の幅を狭くなるようにする。Incidentally, the horizontal reinforcing bar 7'on the opposite side of the reinforcing bar basket 8 of the trailing element 2 aligned with the horizontal reinforcing bar 7 on the pulling side is bent inward so that the horizontal reinforcing bar 7'is inserted between the horizontal reinforcing bars 5. Make the mutual width narrower.
【0015】このようにして鉄筋カゴ4を吊り降ろし、
コンクリート6を打設して先行エレメント1のパネルを
形成した後で、後行エレメント2の鉄筋カゴ8を掘削溝
9内に配設するが、この配設時には水平鉄筋7はガイド
金物であるL形鋼11または平鋼に沿って先行エレメント
1の鉄筋カゴ4の水平鉄筋5に離れないように重ねる。In this way, the reinforcing bar basket 4 is hung down,
After the concrete 6 is cast to form the panel of the leading element 1, the reinforcing bar basket 8 of the trailing element 2 is arranged in the excavation groove 9. At this time, the horizontal reinforcing bar 7 is the guide metal L. Along the shaped steel 11 or the flat steel, the reinforcing steel basket 4 of the preceding element 1 is overlapped with the horizontal reinforcing steel 5 so as not to be separated.
【0016】図示の例ではこの場合、後行エレメント2
の水平鉄筋7は先行エレメント1側の水平鉄筋5の外側
(かぶりコンクリート側)にくるように建込んだが、こ
の外側(かぶりコンクリート側)にくる水平鉄筋は先行
エレメント1側の水平鉄筋5でもよい。In the illustrated example, in this case the trailing element 2
The horizontal rebar 7 of No. 1 was installed outside the horizontal rebar 5 on the side of the preceding element 1 (cover concrete side), but the horizontal rebar 5 on the outside (cover concrete side) may be the horizontal rebar 5 of the preceding element 1 side. .
【0017】一方、水平鉄筋7′は前記図4に示す従来
例と同じく水平鉄筋5の内側で少し離間して位置するこ
とになる。そして後行エレメント2側にコンクリートを
打設して後行パネルを形成する。On the other hand, the horizontal reinforcing bar 7'is located slightly apart inside the horizontal reinforcing bar 5 as in the conventional example shown in FIG. Then, concrete is placed on the trailing element 2 side to form a trailing panel.
【0018】図3は本発明の第2実施例を示すもので、
後行エレメント2側の鉄筋カゴ8の先端部の水平鉄筋
7,7は両方とも直状として先行エレメント1の鉄筋カ
ゴ4の水平鉄筋5の両サイドのものに離れないように重
ねるようにしてもよい。FIG. 3 shows a second embodiment of the present invention.
Even if the horizontal reinforcing bars 7, 7 at the tip of the reinforcing bar basket 8 on the trailing element 2 side are both straight, they may be overlapped on the both sides of the horizontal reinforcing bar 5 of the reinforcing bar basket 4 of the preceding element 1 so as not to separate. Good.
【0019】このようにすれば、両側の水平鉄筋の間隔
を小さくでき、面外曲げの方向が変わる場合でも対処で
きる。With this arrangement, the distance between the horizontal reinforcing bars on both sides can be reduced, and it is possible to deal with the case where the direction of out-of-plane bending changes.
【0020】[0020]
【発明の効果】以上述べたように本発明の地中連続壁の
継手構造は、先行エレメントの鉄筋カゴの水平鉄筋に後
行エレメントの鉄筋カゴの水平鉄筋を重ね継手で配設す
る場合に、面外方向の曲げを受けた時に引張り側コンク
リートに生じるひび割れは、水平鉄筋間に進展しないよ
うにして、かぶりコンクリート側にある水平鉄筋がはじ
けて鉛直継手部の耐力が低下することを防止できるもの
である。As described above, the joint structure of the underground wall of the present invention has a structure in which the horizontal reinforcing bars of the trailing element reinforcing bar cage are arranged in the lap joints on the horizontal reinforcing bars of the reinforcing bar cage of the preceding element. Cracks that occur in the concrete on the tensile side when subjected to out-of-plane bending are prevented from developing between the horizontal rebars, and it is possible to prevent the horizontal rebar on the cover concrete side from popping off and lowering the yield strength of the vertical joint. Is.
【図1】本発明の地中連続壁の継手構造の第1実施例を
示す平面図である。FIG. 1 is a plan view showing a first embodiment of a joint structure for an underground continuous wall according to the present invention.
【図2】本発明の地中連続壁の継手構造の第1実施例を
示す側面図である。FIG. 2 is a side view showing a first embodiment of a joint structure for an underground continuous wall according to the present invention.
【図3】本発明の地中連続壁の継手構造の第2実施例を
示す平面図である。FIG. 3 is a plan view showing a second embodiment of the underground wall joint structure of the present invention.
【図4】従来例を示す横断平面図である。FIG. 4 is a cross-sectional plan view showing a conventional example.
1…先行エレメント 2…後行エレメント 3…仕切板 4…鉄筋カゴ 5…水平鉄筋 6…コンクリート 7,7′…水平鉄筋 8…鉄筋カゴ 9…掘削溝 10…平鋼 11…L形鋼 1 ... Leading element 2 ... Trailing element 3 ... Partition plate 4 ... Reinforcing bar basket 5 ... Horizontal reinforcing bar 6 ... Concrete 7,7 '... Horizontal reinforcing bar 8 ... Reinforcing bar basket 9 ... Excavation groove 10 ... Flat steel 11 ... L-shaped steel
Claims (1)
後行エレメントの鉄筋カゴの水平鉄筋を重ね継手で接合
する場合において、先行エレメントの鉄筋カゴの引張り
側の水平鉄筋を直状としてこれの先端に縦方向の平鋼ま
たはL形鋼からなるガイド金物を取付け、後行エレメン
トの鉄筋カゴの引張り側の水平鉄筋も直状としてこれの
先端に縦方向の平鋼からなるガイド金物を取付け、前記
ガイド金物に沿って先行エレメントの鉄筋カゴの水平鉄
筋に離れないように重ねることを特徴とした地中連続壁
の継手構造。1. When joining a horizontal reinforcing bar of a reinforcing bar basket of a preceding element and a horizontal reinforcing bar of a reinforcing bar basket of a trailing element by a lap joint, the horizontal reinforcing bar on the pulling side of the reinforcing bar basket of the preceding element is made straight and its tip end is straightened. A guide metal member made of flat steel or L-shaped steel in the vertical direction is attached to, the horizontal rebar on the pulling side of the reinforcing bar basket of the trailing element is also straight, and a guide metal member made of flat steel in the vertical direction is attached to the tip thereof. A joint structure for underground continuous walls, characterized by overlapping the guide element with the horizontal reinforcing bar of the reinforcing bar basket of the preceding element so as not to separate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5170696A JP2694715B2 (en) | 1993-07-09 | 1993-07-09 | Joint structure of underground wall |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5170696A JP2694715B2 (en) | 1993-07-09 | 1993-07-09 | Joint structure of underground wall |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0726556A true JPH0726556A (en) | 1995-01-27 |
JP2694715B2 JP2694715B2 (en) | 1997-12-24 |
Family
ID=15909709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5170696A Expired - Lifetime JP2694715B2 (en) | 1993-07-09 | 1993-07-09 | Joint structure of underground wall |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2694715B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102661012A (en) * | 2012-05-31 | 2012-09-12 | 东南大学 | Edge member connecting structure of assembly type concrete shear wall |
CN115492309A (en) * | 2022-10-31 | 2022-12-20 | 中国十九冶集团有限公司 | Steel reinforcement cage expansion structure and construction method for installing box steel column in steel reinforcement cage |
-
1993
- 1993-07-09 JP JP5170696A patent/JP2694715B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102661012A (en) * | 2012-05-31 | 2012-09-12 | 东南大学 | Edge member connecting structure of assembly type concrete shear wall |
CN115492309A (en) * | 2022-10-31 | 2022-12-20 | 中国十九冶集团有限公司 | Steel reinforcement cage expansion structure and construction method for installing box steel column in steel reinforcement cage |
Also Published As
Publication number | Publication date |
---|---|
JP2694715B2 (en) | 1997-12-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH094118A (en) | Precast concrete plate | |
JP2000291181A (en) | Construction method for precast earthquake resistant wall | |
JP2694715B2 (en) | Joint structure of underground wall | |
JP2775224B2 (en) | Underground diaphragm wall joint structure | |
JP2545626Y2 (en) | PC beam | |
JPH05156627A (en) | Joint structure of underground continuous wall | |
JPH10237860A (en) | Mehtod for joining underground continuous wall | |
JPH07107265B2 (en) | Reinforcing bar cage joining method for continuous underground wall | |
JP3213747B2 (en) | Horizontal reinforcement connection of underground diaphragm wall | |
JPH05148834A (en) | Junction structure of underground continuous well | |
JPH11209967A (en) | Joint structure of underground continuous wall | |
JPS5817846Y2 (en) | Column and beam joining equipment | |
JPH063043B2 (en) | PC beam-column joint structure | |
JPS6340029A (en) | Beam member for prefabricated construction method | |
JPH07317211A (en) | Steel pipe reinforced concrete pile | |
JPS6335074Y2 (en) | ||
JPH05187017A (en) | Junction structure of underground continuous wall | |
JP2645929B2 (en) | Connection structure of underground continuous wall | |
JPH0941676A (en) | Shear strength enhancement type reinforcing method for existing reinforced concrete column | |
JPH05331845A (en) | Reinforcement cage jointing method for underground continuous wall | |
JPS63184610A (en) | Joint for continuous underground wall | |
JPH10317369A (en) | Construction method for main body wall | |
JPS6164940A (en) | Pc panel in synthetic outer wall | |
JP2516498B2 (en) | Connection structure of underground continuous wall | |
JPH084175A (en) | Connection structure of floor slab |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |