JPH0444718Y2 - - Google Patents
Info
- Publication number
- JPH0444718Y2 JPH0444718Y2 JP1986073289U JP7328986U JPH0444718Y2 JP H0444718 Y2 JPH0444718 Y2 JP H0444718Y2 JP 1986073289 U JP1986073289 U JP 1986073289U JP 7328986 U JP7328986 U JP 7328986U JP H0444718 Y2 JPH0444718 Y2 JP H0444718Y2
- Authority
- JP
- Japan
- Prior art keywords
- bars
- joint surface
- reinforcing bars
- reinforcing
- reinforcing bar
- 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
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 46
- 230000002787 reinforcement Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、シールド工法で使用される単鉄筋
の配筋をしている小口径セグメントにおいて、継
手面の破壊を防止する継手部補強構造に関するも
のである。[Detailed description of the invention] [Field of industrial application] This invention relates to a joint reinforcement structure that prevents destruction of the joint surface in small-diameter segments with single reinforcing bars used in the shield construction method. It is something.
この種の小口径セグメント（セグメント厚さ
100mm）は、薄いために複鉄筋が配筋できないの
で、セグメント厚さの中心位置に単鉄筋として配
筋せざるをえない。そして一般に複鉄筋を使用で
きるのは、セグメント厚さ125mm以上のものであ
る。
This kind of small diameter segment (segment thickness
100mm), it is not possible to place double reinforcing bars due to its thinness, so single reinforcing bars must be placed at the center of the segment thickness. In general, double reinforcing bars can be used for segments with a thickness of 125 mm or more.
そして通常ジヤツキ推力に対して複鉄筋断面の
場合の破損状況は、一般に鉄筋のかぶりの部分が
剥離破損している。したがつて単鉄筋の場合を想
定すると鉄筋かぶりは、50mm近くあり、その部分
が全部剥離破損する恐れがある。そのため小口径
セグメントにおいて継手面を確実に補強できる補
強構造が望まれていた。 In the case of double reinforcing bar cross section due to normal jacking thrust, the damage state is generally that the covered part of the reinforcing bar is peeled off and damaged. Therefore, assuming the case of a single reinforcing bar, the reinforcing bar cover is approximately 50 mm, and there is a risk that the whole part will peel off and break. Therefore, a reinforcement structure that can reliably reinforce the joint surface in small-diameter segments has been desired.
〔考案の目的〕
この考案は、前述した事情に鑑み創案されたも
ので、その目的は単鉄筋しか使用できない小口径
セグメントにおいて、その継手面のかぶり部を確
実に補強できる補強構造を提供することにある。[Purpose of the invention] This invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a reinforcing structure that can reliably reinforce the overlapping portion of the joint surface in small-diameter segments where only single reinforcing bars can be used. It is in.
以下この考案を図示する実施例によつて説明す
る。
This invention will be explained below with reference to illustrated embodiments.
符号１はトンネル覆工の一部を示し、小口径セ
グメント２の各継手面２ａ，２a′と平行して平面
的に補強可能なように形成された補強筋３と、こ
の補強筋３を小口径セグメント２の主鉄筋４に取
付け固定する複数の固定用筋５とから構成されて
いる。主鉄筋４には、単鉄筋が使用されている。 Reference numeral 1 indicates a part of the tunnel lining, in which there are reinforcing bars 3 formed in parallel with each joint surface 2a, 2a' of the small-diameter segment 2 so as to be able to be reinforced in a plane, and this reinforcing bar 3 is It is composed of a plurality of fixing bars 5 that are attached and fixed to the main reinforcing bars 4 of the diameter segment 2. A single reinforcing bar is used as the main reinforcing bar 4.
補強筋３は、棒状の基部３ａと、この基部３ａ
に複数取付られている小口系セグメント２の厚さ
と合う大きさであるコ字状部３ｂとからなつてい
る。基部３ａとコ字状部３ｂとでループ状をな
す。 The reinforcing bar 3 includes a rod-shaped base 3a and this base 3a.
It consists of a U-shaped portion 3b having a size that matches the thickness of a plurality of fore-end segments 2 attached to the. The base portion 3a and the U-shaped portion 3b form a loop shape.
そして小口径セグメント２の側部継手面２ａに
設けられる補強筋３の基部３ａは、小口径セグメ
ント２と同曲率の円弧状に形成されている。 The base portion 3a of the reinforcing bar 3 provided on the side joint surface 2a of the small diameter segment 2 is formed into an arc shape having the same curvature as the small diameter segment 2.
またコ字状部３ｂは、側部継手面２ａおよび端
部継手面２a′の長さに合わせて適宜数であるとと
もに、継手部６の部分だけ間隔をあけて設けられ
ている。 Further, the U-shaped portions 3b are provided in an appropriate number according to the lengths of the side joint surface 2a and the end joint surface 2a', and are spaced apart from each other by the portion of the joint portion 6.
固定用筋５は、相対する補強筋３間に配される
もので、側部継手面２ａ用の補強部３を固定する
ものと、端部継手面２a′用の補強筋３を固定する
ものとからなる。 The fixing bars 5 are arranged between the opposing reinforcing bars 3, one for fixing the reinforcing part 3 for the side joint surface 2a, and the other for fixing the reinforcing bar 3 for the end joint surface 2a'. It consists of.
そして側部継手面２ａ用補強筋３の固定用筋５
は、基部５ａと、この基部５ａの両端部に設けら
れている折曲部５ｂとから略コ字状に形成されて
いる。 And the fixing bars 5 of the reinforcing bars 3 for the side joint surface 2a
is formed into a substantially U-shape from a base portion 5a and bent portions 5b provided at both ends of the base portion 5a.
また端部継手面２a′用補強筋３の固定用筋５
は、短鉄筋５ｃで構成されている。 Also, the fixing bars 5 of the reinforcing bars 3 for the end joint surface 2a'
is composed of short reinforcing bars 5c.
このような構成からなるセグメント２の組立て
に際して側部継手面２ａの補強筋３の取付けは、
まず第２図のように主鉄筋４の上面に、基部５ａ
を溶着して固定用筋５を取付ける。この溶着は、
補強筋３の基部３ａおよびコ字状部３ｂが溶着で
きるように、折曲部５ｂを適宜上下方向に向けて
行なう。 When assembling the segment 2 having such a configuration, the reinforcing bars 3 on the side joint surface 2a are attached as follows.
First, as shown in Figure 2, place the base 5a on the top surface of the main reinforcing bar 4.
Weld the fixing bars 5. This welding is
The bent portion 5b is appropriately oriented in the vertical direction so that the base portion 3a and the U-shaped portion 3b of the reinforcing bar 3 can be welded together.
その後予め工場等で一体化された補強筋３を、
基部３ａが主鉄筋４の上方位置となるように固定
用板５へ取付ける。この取付けは、基部３ａを上
方へ折曲している折曲部５ｂに、コ字状部３ｂを
下方へ折曲している折曲部５ｂにそれぞれ溶着し
て行なう。 After that, the reinforcing bars 3 that were integrated in advance at the factory etc.
It is attached to the fixing plate 5 so that the base 3a is located above the main reinforcing bar 4. This attachment is performed by welding the base portion 3a to the bent portion 5b bent upward and the U-shaped portion 3b to the bent portion 5b bent downward.
そして端部継手面２a′の補強筋３の取付けは第
８図に示すように主鉄筋４の両端部へ短鉄筋５ｃ
を取付ける。その後この短鉄筋５ｃに、基部３ａ
が主鉄筋４の上方位置となるように、補強筋３を
溶着して取付ける。 The reinforcing bars 3 on the end joint surface 2a' are attached to the short reinforcing bars 5c on both ends of the main reinforcing bars 4 as shown in FIG.
Install. After that, attach the base 3a to this short reinforcing bar 5c.
The reinforcing bars 3 are welded and attached so that the reinforcing bars 3 are located above the main reinforcing bars 4.
このようにして各継手面２ａ，２a′に、各補強
筋３を取付けて補強構造とする。 In this way, each reinforcing bar 3 is attached to each joint surface 2a, 2a' to form a reinforced structure.
この考案は、以上のような構成からなり、次に
述べる効果を有する。
This invention has the above configuration and has the following effects.
小口径セグメントの各継手面に、継手面に平行
して全面を平面的に補強可能な補強筋を主鉄筋と
なる単鉄筋へ固定用鉄筋を利用して取付けて設け
たことにより、継手面を確実に補強できる。 By installing reinforcing bars that can flatly reinforce the entire surface parallel to the joint surface of each small-diameter segment by attaching them to the single reinforcing bar that will serve as the main reinforcement using fixing reinforcing bars, the joint surface can be It can definitely be reinforced.
そのため各継手面における単鉄筋かぶり部の剥
離破損を確実に防止できるので、小口径セグメン
トでも安心して使用できるようになる。 Therefore, it is possible to reliably prevent peeling and damage of the single reinforcing bar covering portion on each joint surface, so that even small-diameter segments can be used with peace of mind.
第１図はこの考案の補強構造の配筋状態を示し
た小口径セグメントの側面図、第２図は第１図の
Ａ−Ａ線断面図、第３図は第２図のＢ−Ｂ線矢視
端面図、第４図は補強用短鉄筋の取付け状態を示
す概略側面図である。
２……小口径セグメント、２ａ，２a′……継手
面、３……補強面、３ａ……基部、３ｂ……コ字
状部、４……主鉄筋、５……固定用筋、５ａ……
基部、５ｂ……折曲部、５ｃ……短鉄筋、６……
継手部。
Fig. 1 is a side view of a small-diameter segment showing the reinforcing structure of this invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 2. FIG. 4 is a schematic side view showing how short reinforcing bars are attached. 2... Small diameter segment, 2a, 2a'... Joint surface, 3... Reinforcement surface, 3a... Base, 3b... U-shaped part, 4... Main reinforcing bar, 5... Fixing bar, 5a... …
Base, 5b...Bending part, 5c...Short reinforcing bar, 6...
Joint part.
Claims (1)
字状部３ｂを連続して形成された補強筋３を配筋
し、この補強筋３を主筋４に取付け固定する複数
の固定用筋５を相対する補強筋３間に配してなる
ことを特徴とするセグメントの継手部補強構造。 Reinforcing bars 3 are arranged in parallel with each joint surface, and are formed by continuously forming a bar-shaped base 3a and a plurality of U-shaped parts 3b, and a plurality of fixing bars are attached and fixed to the main bars 4. 5 is arranged between opposing reinforcing bars 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986073289U JPH0444718Y2 (en) | 1986-05-15 | 1986-05-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986073289U JPH0444718Y2 (en) | 1986-05-15 | 1986-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62185797U JPS62185797U (en) | 1987-11-26 |
| JPH0444718Y2 true JPH0444718Y2 (en) | 1992-10-21 |
Family
ID=30917491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986073289U Expired JPH0444718Y2 (en) | 1986-05-15 | 1986-05-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0444718Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0826751B2 (en) * | 1990-12-27 | 1996-03-21 | 純一 都築 | Concrete segment |
| JP2009299294A (en) * | 2008-06-10 | 2009-12-24 | Shimizu Corp | Concrete segment |
| JP2012167539A (en) * | 2012-04-19 | 2012-09-06 | Shimizu Corp | Concrete segment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58134493A (en) * | 1982-02-05 | 1983-08-10 | 日本電気株式会社 | Printed circuit board |
| JPS5927292B2 (en) * | 1980-05-02 | 1984-07-04 | レジ−、ナショナル、デ、ユジン、ルノ− | vertical drilling equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5256908U (en) * | 1975-10-23 | 1977-04-25 | ||
| JPS5927292U (en) * | 1982-08-13 | 1984-02-20 | 石川島建材工業株式会社 | Small diameter concrete segment |
-
1986
- 1986-05-15 JP JP1986073289U patent/JPH0444718Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5927292B2 (en) * | 1980-05-02 | 1984-07-04 | レジ−、ナショナル、デ、ユジン、ルノ− | vertical drilling equipment |
| JPS58134493A (en) * | 1982-02-05 | 1983-08-10 | 日本電気株式会社 | Printed circuit board |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62185797U (en) | 1987-11-26 |
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