JP3716973B2

JP3716973B2 - Angry material

Info

Publication number: JP3716973B2
Application number: JP2000205648A
Authority: JP
Inventors: 英治豊田; 公明渡辺
Original assignee: Nippon Light Metal Co Ltd
Current assignee: Nippon Light Metal Co Ltd
Priority date: 2000-07-06
Filing date: 2000-07-06
Publication date: 2005-11-16
Anticipated expiration: 2020-07-06
Also published as: JP2002021078A

Description

【０００１】
【発明の属する技術分野】
この発明は、腹起し材に関するもので、更に詳細には、下水管の再生工事等の水の溜まる工事に用いる腹起し材に関するものである。
【０００２】
【従来の技術】
一般に、下水管の更生工事は、下水管内を洗浄し、製管機により更生管を製管した後、更生管の浮上や変形防止のため更生管内に腹起し材と支保工を設置し、裏込め材を注入して仕上げるという作業が行われる。
【０００３】
上記作業は一定のスパン、例えばマンホール間で行われ、順次次のスパンに進んでいく。したがって、スパン毎の更生工事が終了して次のスパンの更生工事に移る場合には、腹起し材と支保工を分解して運搬し再び次のスパンの更生管内に腹起し材と支保工を設置するという作業が行われている。
【０００４】
上記腹起し材は上記支保工の横架材として用いられるが、支保材に取り付けられるジャッキ等により更生管に圧接した状態で、この更生管を支持するために使用される。
【０００５】
また、腹起し材は、土砂が崩れたり流されたりするのを防ぐ土留めにも使用されるが、この場合は土壌を掘削してできた溝等の側面に取り付ける矢板や親板を支持する横架材として用いられる。
【０００６】
この腹起し材は一般に、軽量化を図るために中空筒状部材にて形成されている。しかし、中空筒状部材の中空部内に土砂や水等が侵入し、腹起し材を内部から腐食させたり運搬を困難にするという問題があった。これを解決するために、腹起し材の両端開口部とキャップをボルトで接合する構造のものが知られている（特開平１０−４６５７８号公報参照）。
【０００７】
【発明が解決しようとする課題】
しかしながら、従来のキャップを有する腹起し材においても、更生工事を行うときには、通常更生管内に下水が流れた状態で施工するため、上記腹起し材の構造では土砂や水等の進入を完全に排除することはできず改善すべき点があった。
【０００８】
更に、中空筒状部材の中空部内に土砂や水等が侵入すると、腹起し材と支保工を解体したとき、腹起し材が重い状態で下水中に沈水するため運搬しづらいという問題があった。また逆に、腹起し材の比重が極端に小さいと、腹起し材の重心が水面より上方へ浮き上がってしまい腹起し材が回転しやすくなるため、水中での腹起し材の設置や運搬がし難くなるという問題がある。
【０００９】
更に、従来の腹起し材の構造では、図１２（ａ）に示すように、１つの腹起し材ａに対し両端の最低２箇所を支保材ｂ等で支持するか、あるいは、図１２（ｂ）に示すように腹起し材ａの端部同士を重ねて重なり部を支保材ｂで支持する必要があったため、前者の場合、支保工用部材の数が多くなり、後者の場合、腹起し材ａの数が多くなり、支保工の運搬、設置、解体等の作業が面倒である等の問題があった。
【００１０】
この発明は上記事情に鑑みなされたもので、下水管の更生工事等の水の溜まる工事において、運搬及び設置作業を容易にする腹起し材を提供することを目的とするものである。
【００１１】
【課題を解決するための手段】
上記目的を達成するために、この発明の腹起し材は、中空筒状部材と、この中空筒状部材の両端開口部に気水密に接合されるキャップとからなり、全体の比重が１以下であることを特徴とするものである（請求項１）。中空筒状部材とキャップの接合は、ＭＩＧ溶接、ＴＩＧ溶接、摩擦撹拌接合等を用いることができる。
【００１２】
この発明において、上記比重が０．５以上１未満である方が好ましい（請求項２）。
【００１３】
また、この発明において、上記中空筒状部材は、例えばアルミニウム製押出形材にて形成することができ、また、上記キャップは、アルミニウム製ダイキャストにて形成することができる。上記中空筒状部材と上記キャップは、摩擦撹拌接合により表面が平坦に接合されると更によい。また、上記キャップは、上記中空筒状部材との接合状態における中空筒状部材の長手方向に凹状部あるいは凸状部を有し、上記凹状部と凸状部の嵌合により複数の腹起し材を連結可能に形成する方が好ましい（請求項３）。
【００１４】
ここで、摩擦撹拌接合とは、金属材料例えばアルミニウム同士を突合わせ、この突き合わせ面に回転する接合ツールを挿入し、突き合わせ面に沿って移動させ、被接合材を塑性流動させることで両部材を接合するものである。
【００１５】
この発明の腹起し材によれば、中空筒状部材とキャップとで中空密閉状に形成されるので、水中では浮力が加わり、水中での見かけの重量が軽くなるため運搬が容易である（請求項１）。また、腹起し材の比重が１以下好ましくは０．５以上１未満に形成することで、水中に浮かべることができると共に、重心を水面の下側に位置させて回転等をし難い安定した状態にすることができ、運搬や水中での設置作業を一層容易にすることができる。（請求項１，２）。
【００１７】
また、キャップは、中空筒状部材との接合時における中空筒状部材の長手方向に凹状部あるいは凸状部を有し、凹状部と凸状部を嵌合させて複数の腹起し材を連結することにより、腹起し材を簡単に連続的に配置することができる。また、複数の腹起し材を連結して一体的にすることができるので、最小限の支保材及びジャッキによって腹起し材を支持することができる。したがって、支保工用部材を削減することができると共に支保工の設置、解体等を短時間で行うことができる。また、下水管が真直ぐでない場合、下水管の曲がりに対応して腹起し材を配置する必要があるが、このとき凹状部と凸状部との嵌合により連続する腹起し材同士のずれを生じることなく容易に配置することができる（請求項３）。
【００１８】
【発明の実施の形態】
以下にこの発明の実施例を図面に基いて詳細に説明する。ここでは、この発明を下水管の更生工事に適用した場合について説明する。
【００１９】
下水管の更生工事では、まず既設管１内に例えばスチール補強材を組み込んだ合成樹脂製の帯状をなすプロファイルを自走式製管機によって供給し、製管機の嵌合ローラを回転しながらプロファイルを螺旋状に連結して所定の断面形状の更生管２を成形する。
【００２０】
次に、更生管２に浮上や変形防止のため、更生管２の長手方向にこの発明に係る腹起し材５を横架する一方、更生管２の長手方向に対して垂直に一定間隔で略方形状の支保材３を設置する。この状態で、この支保材３の各片に貫通状態に取り付けられたジャッキ６のブラケット６ａを腹起し材５に係合させて、腹起し材５を更生管２に圧接する（図１及び図２参照）。
【００２１】
そして、既設管１と更生管２との隅間にコンクリート等の裏込め材を注入して下水管の更生を行う。
【００２２】
次に、この発明に係る腹起し材５について説明する。
【００２３】
図２は腹起し材５の嵌合状態を示す要部平面図、図３は腹起し材５の一例を示す断面図、図４は凹状部８ｂを有するキャップ８を示す概略斜視図、図５は凸状部９ｂを有するキャップ９を示す概略斜視図、図６は腹起し材の嵌合状態を示す断面図である。
【００２４】
上記腹起し材５は、例えばアルミニウム製押出形材にて形成される中空筒状部材７と、この中空筒状部材７の両端開口部に気水密に接合される例えばアルミニウム製ダイキャストにて形成されるキャップ８及び９とで構成されている。
【００２５】
この場合、中空筒状部材７の断面は、角部が凸状円弧面を有する四角形の外形断面と、六角形の内形断面とを有する。この断面は、対向する一方の２辺が等しい肉厚に形成され、対向する他方の２辺は、その中間部から両端（角部）に向かって漸次肉厚に形成されている（図９及び図１０参照）。
【００２６】
このように、中間筒状部材の内形断面を六角形とした理由は、ジャッキ６による更生管２への圧接時の荷重に耐え得るようにするためである。なお、中空筒状部材の形状は、必ずしも上記のような形状である必要はなく、例えば全辺同じ肉厚の断面四角形にしてもよい。
【００２７】
キャップ８は、中空筒状部材の開口端面に当接する四角形状のフランジ部（鍔部）８ａと、中空筒状部材の長手方向の内方側に向かう凹状部８ｂとを具備する。この場合、凹状部８ｂは、断面が六角形状（中空筒状部材の内形断面と相似形）に形成されると共に、先端に向かって狭小のテーパ状に形成されている。
【００２８】
キャップ９は、中空筒状部材の開口端面に当接する四角形状のフランジ部（鍔部）９ａと、中空筒状部材の開口部内方に嵌挿（挿入）される脚部９ｃと、中空筒状部材の長手方向の外方側に向かう凸状部９ｂとを具備する。この場合、凸状部９ｂは、断面が六角形状に形成されると共に、先端に向かって狭小のテーパ状に形成され、かつ、凹状部８ｂと嵌合し得るように形成されている（図６参照）。
【００２９】
キャップ８、キャップ９を上記のように形成することにより、腹起し材の嵌合が容易となり、また、嵌合状態において腹起し材同士が回転しないという効果がある。更に、複数の腹起し材５を連結することができるので、一つの腹起し材５の両端をジャッキ６と支保材３で支持したり、腹起し材５の端部同士を重ねて重なり部をジャッキ６と支保材３で支持する必要はなく、例えば、図２に示すように二つの腹起し材５の連結部をジャッキ６で支持するようにすれば、ジャッキ６や支保材３、腹起し材５の数を削減することができ、また支保工の設置、解体等を短時間で行うことができる。また、下水管が真直ぐでない場合、下水管の曲がりに対応して腹起し材５を配置する必要があるが、このとき凹状部と凸状部との嵌合により連続する腹起し材５同士のずれを生じることなく容易に配置することができる。
【００３０】
また、腹起し材５の比重は１以下好ましくは０．５以上１未満に形成される方がよい。この理由は、比重が０．５未満であると、腹起し材５の重心が水面より上方へ浮き上がってしまい腹起し材５が回転し易くなるため、水中での腹起し材の設置や運搬が難しくなるからであり、比重が１よりも大きいと、腹起し材が下水中に浸水し、やはり運搬が困難になるからである。なお、腹起し材５の比重が１であっても下水の下方に沈むことがなく、下水中に浮くので、運搬や設置作業を容易にすることができる。
【００３１】
腹起し材５は、例えば、以下のような形状、重量の中空筒状部材とキャップとを用いて作製することができる。
【００３２】
まず、アルミニウム製押出形材よりなる中空筒状部材の断面形状を図９ないし図１１に示すように形成する。図９に示す中空筒状部材（ＨＣ）の断面形状を、Ｌ１１＝１２５（ｍｍ），Ｌ１２＝１１５（ｍｍ），ｄ１１＝６（ｍｍ），ｄ１２＝１３（ｍｍ），ｄ１３＝５（ｍｍ），Ｒ１１＝８（ｍｍ），Ｒ１２＝８（ｍｍ）に形成する。また、図１０に示す中空筒状部材（ＨＤ）の断面形状を、Ｌ２１＝８０（ｍｍ），Ｌ２２＝１１５（ｍｍ），ｄ２１＝６（ｍｍ），ｄ２２＝１３（ｍｍ），ｄ２３＝５（ｍｍ），Ｒ２１＝８（ｍｍ），Ｒ２２＝８（ｍｍ）に形成する。また、図１１に示す中空筒状部材（ＨＥ）の断面形状を、Ｌ３１＝６０（ｍｍ），Ｌ３２＝８０（ｍｍ），ｄ３１＝６（ｍｍ），ｄ３２＝１０．７（ｍｍ），ｄ３３＝５（ｍｍ），Ｒ３１＝４（ｍｍ），Ｒ３２＝４（ｍｍ）に形成する。
【００３３】
ここで、
Ｌ１１，Ｌ２１，Ｌ３１…肉厚が一定である方の辺の長さ
Ｌ１２，Ｌ２２，Ｌ３２…中間部から角部に向かって漸次肉厚に形成されている辺の長さ
ｄ１１，ｄ２１，ｄ３１…肉厚に形成された辺の中間部の厚さ
ｄ１２，ｄ２２，ｄ３２…肉厚に形成された辺の角部の厚さ
ｄ１３，ｄ２３，ｄ３３…肉厚が一定である辺の厚さ
Ｒ１１，Ｒ２１，Ｒ３１…角部内側の円弧面の半径
Ｒ１２，Ｒ２２，Ｒ３２…角部外側の円弧面の半径
である。
【００３４】
次に、中空筒状部材の両端開口部とアルミニウム製ダイキャストにて形成されるキャップ（重量２．３ｋｇ，１．９ｋｇ，１．３ｋｇ）をＭＩＧ溶接で気水密に接合して、腹起し材を作製したところ、この腹起し材の重量、体積及び比重は表１のようになった。ここでＨＣ４（ＨＤ４，ＨＥ４）、ＨＣ３（ＨＤ３，ＨＥ３）、ＨＣ２（ＨＤ２，ＨＥ２）は中空筒状部材の長手方向の長さをそれぞれ４，３，２（ｍ）とした腹起し材を意味する。
【００３５】
【表１】

【００３６】
このように形成することにより、腹起し材の比重を小さくすることができるので、水中での見かけの重量が軽くなり運搬が容易となる。特に、腹起し材ＨＣ，ＨＤは比重を０．５以上１未満にすることができるので、水面に浮かべることができると共に、重心を水面の下側に位置させて回転等をし難い安定した状態にすることができ、運搬や水中での設置作業を更に容易にすることができる。
【００３７】
上記実施形態では、腹起し材５を下水管の更生工事に用いる場合について説明したが、上記腹起し材５は土留めにも使用できる。この場合には、図７及び図８に示すように、土壌を掘削してできた溝１１の両側に土砂が溝内に崩れ落ちるのを防止するための鋼矢板１２を取り付け、溝１１の長手方向に横架する腹起し材５をサポート１３等によりこの鋼矢板１２に圧接して使用する。この場合においても、キャップ８の凹状部とキャップ９の凸状部とを嵌合させて、複数の腹起し材５を一体的に連結することができる。したがって、腹起し材５の連結部にサポート１３で支持することができ、サポート１３の数を減らすことができる。
【００３８】
なお、上記中空筒状部材７と上記キャップ８または９の接合部１０は、摩擦撹拌接合により、確実に中空筒状部材７の両端開口部を気水密に接合することもできる。ここで、摩擦撹拌接合とは、金属例えばアルミニウム合金からなる押出形材や板材同士を突合わせ、この突き合わせ面に回転する接合ツールを挿入し、突き合わせ面に沿って移動させ、被接合材を塑性流動させることで、両部材を接合するものである。したがって、ＭＩＧ溶接やＴＩＧ溶接のように溶接部に肉盛等が生じず、接合部１０を平坦にできるので、腹起し材５を整列状態に積み重ねることができ、運搬や保管を容易にすることができる。
【００３９】
また、上記実施形態の腹起し材５においては、中空筒状部材７の両端開口部の一方を凹状部８ｂを有するキャップ８にて接合し、もう一方を凸状部９ｂを有するキャップ９にて接合した場合について説明したが、必ずしもこのような構造にする必要はなく、両端開口部の両方を凹状部８ｂを有するキャップ８あるいは凸状部９ｂを有するキャップ９で接合した腹起し材５とすることもできる。この場合は、凹状部８ｂを有するキャップ８のみで接合された腹起し材５と凸状部９ｂを有するキャップ９のみで接合された腹起し材５の２種類、あるいは凹状部８ｂを有するキャップ８と凸状部９ｂを有するキャップ９にて両端開口部を接合した腹起し材５を加えた３種類を組み合わせて連結することになる。
【００４０】
また、上記実施形態においては、二つの腹起し材５の嵌合部をジャッキ６やサポート１３で支持する場合について説明したが、ジャッキ６やサポート１３で支持するのは腹起し材５同士の嵌合部である必要はなく、例えば腹起し材５の長手方向における中央部をそれぞれ支持するようにしてもよい。
【００４１】
【発明の効果】
以上に説明したように、この発明の腹起し材の構造によれば以下のような効果が得られる。
【００４２】
１）請求項１記載の発明によれば、腹起し材を中空密閉状に形成するので、水中では浮力が加わり、水中での見かけの重量が軽くなるため運搬を容易にすることができる。
【００４３】
２）請求項１，２記載の発明によれば、腹起し材全体の比重を１以下好ましくは０．５以上１未満に形成するので、水中に浮かべることができると共に、重心が水面の下側にあるので回転等をさせずに安定させることができ、運搬や水中での設置作業を容易にすることができる。
【００４５】
３）請求項３に記載の発明によれば、キャップに設けられた凹状部と凸状部を嵌合させて複数の腹起し材を連結することができるので、腹起し材を簡単に連続的に配置することができる。また、複数の腹起し材を連結して一体的にすることができるので、最小限の支保材及びジャッキ等によって腹起し材を支持することができる。したがって、支保工用部材を削減することができると共に支保工の設置、解体等を短時間で行うことができる。
【図面の簡単な説明】
【図１】この発明に係る腹起し材を下水管の更生工事に適用した場合の下水管の概略断面図である。
【図２】この発明に係る腹起し材の嵌合状態を示す要部平面図である。
【図３】この発明に係る腹起し材の一例を示す概略断面図である。
【図４】この発明における腹起し材に接合された凹状部を有するキャップを示す概略斜視図である。
【図５】この発明における腹起し材に接合された凸状部を有するキャップを示す概略斜視図である。
【図６】この発明に係る腹起し材の嵌合状態を示す要部断面図である。
【図７】この発明に係る腹起し材を土留めに適用した場合の概略断面図である。
【図８】この発明に係る腹起し材を土留めに適用した場合の概略斜視図である。
【図９】この発明における中空筒状部材の断面図である。
【図１０】この発明における他の中空筒状部材の断面図である。
【図１１】この発明における他の中空筒状部材の断面図である。
【図１２】従来の腹起し材を下水管の更生工事に適用した場合の使用状態の要部を示す平面図（ａ）及び従来の別の使用状態の要部を示す側面図（ｂ）である。
【符号の説明】
７中空筒状部材
８，９キャップ
８ｂ凹状部
９ｂ凸状部
１０接合部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an abdominal erection material, and more particularly, to an erection material used for water accumulation work such as a sewage pipe regeneration work.
[0002]
[Prior art]
Generally, sewage pipe rehabilitation work is to clean the sewage pipe, pipe the rehabilitation pipe with a pipe making machine, and then install the abdominal material and support in the rehabilitation pipe to prevent the rehabilitation pipe from floating and deforming. The work of injecting back finishing material is done.
[0003]
The above operation is performed between a certain span, for example, between manholes, and proceeds to the next span sequentially. Therefore, when the rehabilitation work for each span is completed and the rehabilitation work for the next span is started, disassemble and transport the abdominal lining material and the support work, and then reinstate the repellent material and the support in the rehabilitation pipe of the next span. The work of installing a craft is being carried out.
[0004]
The above-mentioned flank material is used as a horizontal member for the above-mentioned support work, and is used to support the rehabilitated pipe in a state of being pressed against the rehabilitated pipe by a jack or the like attached to the support material.
[0005]
In addition, the lining material is also used as a retaining pad to prevent the earth and sand from collapsing or being washed away. In this case, it supports a sheet pile or a main plate attached to the side surface of a groove formed by excavating the soil. Used as a horizontal member.
[0006]
In general, the anti-raising material is formed of a hollow cylindrical member in order to reduce the weight. However, there has been a problem that earth and sand, water and the like enter the hollow part of the hollow cylindrical member, corrode the angry material from the inside, and make it difficult to transport. In order to solve this problem, there is known a structure in which both end openings of the lining member and the cap are joined with bolts (see Japanese Patent Laid-Open No. 10-46578).
[0007]
[Problems to be solved by the invention]
However, even in the case of the lining material having a conventional cap, when the rehabilitation work is performed, it is usually performed in a state where the sewage flows into the rehabilitation pipe. However, there were points that could not be eliminated.
[0008]
Furthermore, when earth or sand or water enters into the hollow part of the hollow cylindrical member, when the angry material and the support work are dismantled, the angry material is submerged in the sewage under heavy conditions, making it difficult to transport. there were. Conversely, if the specific gravity of the angry material is extremely small, the center of gravity of the angry material will rise above the water surface, making it easier for the angry material to rotate. There is a problem that it becomes difficult to carry.
[0009]
Further, in the structure of the conventional bulging material, as shown in FIG. 12 (a), at least two places at both ends are supported by the supporting material b or the like with respect to one bulging material a, or FIG. As shown in (b), it was necessary to overlap the end portions of the flank material a and support the overlapping portion with the support material b. In the former case, the number of support members increased, and in the latter case However, there are problems such as an increase in the number of upset materials a, and troublesome operations such as transportation, installation, and dismantling of the support work.
[0010]
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an erection material that facilitates transportation and installation work in water accumulation work such as sewage pipe rehabilitation work.
[0011]
[Means for Solving the Problems]
To achieve the above object, wale material of the invention comprises a tubular member, Ri Do and a cap that is joined to the gas watertight openings of both ends of the tubular member, the overall specific gravity of 1 It is characterized by the following (claim 1). For joining the hollow cylindrical member and the cap, MIG welding, TIG welding, friction stir welding, or the like can be used.
[0012]
Oite to the present invention, the specific gravity it is preferable less than 1 0.5 or more (claim 2).
[0013]
Moreover, in this invention, the said hollow cylindrical member can be formed, for example with an aluminum extruded profile, and the said cap can be formed with aluminum die-casting. More preferably, the hollow cylindrical member and the cap are joined with a flat surface by friction stir welding . Further, the cap has a concave portion or a convex portion in the longitudinal direction of the hollow cylindrical member in a joined state with the hollow cylindrical member, and a plurality of erections are caused by the fitting of the concave portion and the convex portion. It is preferable to form the materials so as to be connectable (claim 3 ).
[0014]
Here, the friction stir welding means that metal materials such as aluminum are abutted together, a joining tool that rotates is abutted on the abutting surface, moved along the abutting surface, and the members to be joined are plastically flowed. It is what is joined.
[0015]
According to the abdominal material of the present invention, since the hollow cylindrical member and the cap are formed in a hollow sealed shape, buoyancy is added in water, and the apparent weight in water is reduced, so that transportation is easy ( Claim 1). In addition, by forming the abdominal material with a specific gravity of 1 or less, preferably 0.5 or more and less than 1, it can float in the water, and the center of gravity is located below the water surface, making it difficult to rotate and the like. It can be in a state, and transportation and installation work in water can be further facilitated. (Claims 1 and 2 ).
[0017]
Further, the cap has a concave portion or a convex portion in the longitudinal direction of the hollow cylindrical member at the time of joining with the hollow cylindrical member, and the concave portion and the convex portion are fitted to each other to form a plurality of angry materials. By linking, the erection material can be easily and continuously arranged. In addition, since the plurality of bell-raised members can be connected and integrated, the bell-raised material can be supported by the minimum support material and jack. Therefore, the number of support members can be reduced, and the installation and disassembly of the support work can be performed in a short time. In addition, when the sewer pipe is not straight, it is necessary to arrange the flank material corresponding to the bend of the sewage pipe, but at this time, between the flank materials continuous by the fitting of the concave portion and the convex portion They can be easily arranged without causing a shift (Claim 3 ).
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. Here, the case where this invention is applied to the rehabilitation work of a sewer pipe is demonstrated.
[0019]
In the sewage pipe rehabilitation work, first, for example, a profile made of a synthetic resin with a steel reinforcing material incorporated in the existing pipe 1 is supplied by a self-propelled pipe making machine while rotating the fitting roller of the pipe making machine. The rehabilitation pipe 2 having a predetermined cross-sectional shape is formed by connecting the profiles in a spiral shape.
[0020]
Next, in order to prevent the rehabilitation pipe 2 from rising or deforming, the angling material 5 according to the present invention is horizontally laid in the longitudinal direction of the rehabilitation pipe 2 while being perpendicular to the longitudinal direction of the rehabilitation pipe 2 at regular intervals. A substantially rectangular support material 3 is installed. In this state, the bracket 6a of the jack 6 attached in a penetrating manner to each piece of the support member 3 is engaged with the flank member 5, and the flank member 5 is pressed against the rehabilitation pipe 2 (FIG. 1). And FIG. 2).
[0021]
Then, backfilling material such as concrete is injected between the existing pipe 1 and the rehabilitated pipe 2 to rehabilitate the sewer pipe.
[0022]
Next, the stomach raising material 5 according to the present invention will be described.
[0023]
2 is a main part plan view showing a fitting state of the flank material 5, FIG. 3 is a cross-sectional view showing an example of the flank material 5, and FIG. 4 is a schematic perspective view showing a cap 8 having a concave portion 8b. FIG. 5 is a schematic perspective view showing a cap 9 having a convex portion 9b, and FIG. 6 is a cross-sectional view showing a fitting state of an erection material.
[0024]
The anti-raised material 5 is formed of, for example, a hollow cylindrical member 7 formed of an extruded aluminum member, and an aluminum die-cast member that is air-tightly bonded to both end openings of the hollow cylindrical member 7. The

caps

8 and 9 are formed.
[0025]
In this case, the cross section of the hollow cylindrical member 7 has a rectangular outer cross section with a convex arcuate surface at the corner and a hexagonal inner cross section. In this cross section, one opposite two sides are formed to have an equal thickness, and the other two opposite sides are formed to gradually increase in thickness from the intermediate portion toward both ends (corner portions) (see FIG. 9 and FIG. 9). (See FIG. 10).
[0026]
Thus, the reason why the inner cross section of the intermediate cylindrical member is hexagonal is to withstand the load applied when the jack 6 is pressed against the rehabilitation pipe 2. Note that the shape of the hollow cylindrical member is not necessarily the above-described shape, and may be a rectangular cross section having the same thickness on all sides, for example.
[0027]
The cap 8 includes a quadrangular flange portion (a flange portion) 8a that comes into contact with the opening end surface of the hollow cylindrical member, and a concave portion 8b that faces inward in the longitudinal direction of the hollow cylindrical member. In this case, the concave portion 8b is formed in a hexagonal shape (similar to the inner cross section of the hollow cylindrical member) in cross section, and in a narrow taper shape toward the tip.
[0028]
The cap 9 includes a rectangular flange portion (a collar portion) 9a that abuts against the opening end surface of the hollow cylindrical member, a leg portion 9c that is inserted (inserted) into the opening portion of the hollow cylindrical member, and a hollow cylindrical shape. And a convex portion 9b facing outward in the longitudinal direction of the member. In this case, the convex portion 9b has a hexagonal cross section, is formed in a narrow taper shape toward the tip, and is formed so as to be fitted to the concave portion 8b (FIG. 6). reference).
[0029]
By forming the cap 8 and the cap 9 as described above, it is easy to fit the flared material, and there is an effect that the flared materials do not rotate in the fitted state. Further, since a plurality of erection members 5 can be connected, both ends of one erection member 5 are supported by the jack 6 and the support member 3, or the ends of the erection members 5 are overlapped. It is not necessary to support the overlapping portion with the jack 6 and the supporting material 3. For example, if the connecting portion of the two erection members 5 is supported with the jack 6 as shown in FIG. 3. The number of upset materials 5 can be reduced, and the installation and dismantling of the support works can be performed in a short time. Moreover, when the sewer pipe is not straight, it is necessary to arrange the erection material 5 corresponding to the bending of the sewage pipe, but at this time, the erection material 5 which is continuous by fitting the concave portion and the convex portion. It can arrange | position easily, without producing a shift | offset | difference.
[0030]
Moreover, the specific gravity of the erection material 5 should be 1 or less, preferably 0.5 or more and less than 1. The reason for this is that if the specific gravity is less than 0.5, the center of gravity of the erection material 5 floats upward from the water surface, and the erection material 5 is easy to rotate. This is because if the specific gravity is greater than 1, the angry material will be submerged in the sewage and it will be difficult to carry. In addition, even if the specific gravity of the erection material 5 is 1, it does not sink below the sewage and floats in the sewage, so that transportation and installation work can be facilitated.
[0031]
The angling material 5 can be produced using, for example, a hollow cylindrical member and a cap having the following shape and weight.
[0032]
First, the cross-sectional shape of a hollow cylindrical member made of an aluminum extruded profile is formed as shown in FIGS. The cross-sectional shape of the hollow cylindrical member (HC) shown in FIG. 9 is L11 = 125 (mm), L12 = 115 (mm), d11 = 6 (mm), d12 = 13 (mm), d13 = 5 (mm). , R11 = 8 (mm) and R12 = 8 (mm). Moreover, the cross-sectional shape of the hollow cylindrical member (HD) shown in FIG. 10 is L21 = 80 (mm), L22 = 115 (mm), d21 = 6 (mm), d22 = 13 (mm), d23 = 5 ( mm), R21 = 8 (mm), and R22 = 8 (mm). Moreover, the cross-sectional shape of the hollow cylindrical member (HE) shown in FIG. 11 is L31 = 60 (mm), L32 = 80 (mm), d31 = 6 (mm), d32 = 10.7 (mm), d33 = 5 (mm), R31 = 4 (mm), and R32 = 4 (mm).
[0033]
here,
L11, L21, L31... Side lengths L12, L22, L32... Side lengths d11, d21, d31... Thickness d12, d22, d32 of the middle part of the side formed to be thick Thicknesses d13, d23, d33 of the side part of the side formed to be thick Thickness R11 of the side where the thickness is constant R21, R31... Radius of the arc surface inside the corner R12, R22, R32... Radius of the arc surface outside the corner.
[0034]
Next, both ends of the hollow cylindrical member and caps (weights 2.3 kg, 1.9 kg, 1.3 kg) formed by aluminum die-casting are joined together in a gas-tight manner by MIG welding, and the abdomen is raised. When a material was produced, the weight, volume, and specific gravity of the angry material were as shown in Table 1. Here, HC4 (HD4, HE4), HC3 (HD3, HE3), and HC2 (HD2, HE2) are erection materials whose longitudinal lengths of the hollow cylindrical members are 4, 3, and 2 (m), respectively. means.
[0035]
[Table 1]

[0036]
By forming in this way, the specific gravity of the angry material can be reduced, so that the apparent weight in water is reduced and transportation is facilitated. In particular, the angry materials HC and HD can have a specific gravity of 0.5 or more and less than 1, so that they can float on the surface of the water, and the center of gravity is located below the surface of the water, making it difficult to rotate and the like. It can be in a state, and transportation and installation work in water can be further facilitated.
[0037]
Although the said embodiment demonstrated the case where the stomach raising material 5 was used for the rehabilitation construction of a sewer pipe, the said stomach raising material 5 can also be used for earth retaining. In this case, as shown in FIGS. 7 and 8, steel sheet piles 12 are attached to both sides of the groove 11 formed by excavating the soil to prevent the earth and sand from collapsing into the groove. The flank material 5 laid horizontally on the steel sheet pile 12 is used by pressing it with a support 13 or the like. Also in this case, the concave portions of the cap 8 and the convex portions of the cap 9 can be fitted to each other so that the plurality of erected members 5 can be integrally connected. Therefore, it can support with the support 13 in the connection part of the angry material 5, and the number of the supports 13 can be reduced.
[0038]
In addition, the joint part 10 of the said hollow cylindrical member 7 and the said

cap

8 or 9 can also join the both-ends opening part of the hollow cylindrical member 7 air-tightly reliably by friction stir welding. Here, the friction stir welding means that extruded shapes and plates made of a metal such as an aluminum alloy are butted together, a rotating welding tool is inserted into the butting surface, and moved along the butting surface, so that the materials to be joined are plastic. Both members are joined by flowing. Accordingly, the welded portion is not overburdened like MIG welding or TIG welding, and the joint portion 10 can be flattened, so that the upset material 5 can be stacked in an aligned state, and transportation and storage are facilitated. be able to.
[0039]
Moreover, in the belly raising material 5 of the said embodiment, one side of the both-ends opening part of the hollow cylindrical member 7 is joined with the cap 8 which has the recessed part 8b, and the other is attached to the cap 9 which has the convex part 9b. However, it is not always necessary to have such a structure, and both the opening portions at both ends are joined by the cap 8 having the concave portion 8b or the cap 9 having the convex portion 9b. It can also be. In this case, there are two types of the flank material 5 joined only by the cap 8 having the concave portion 8b and the flank material 5 joined only by the cap 9 having the convex portion 9b, or the concave portion 8b. The cap 8 and the cap 9 having the convex portion 9b are combined and connected in combination of three types including the bulging material 5 in which the opening portions at both ends are joined.
[0040]
Moreover, in the said embodiment, although the case where the fitting part of the two anti-raising materials 5 was supported by the jack 6 or the support 13 was demonstrated, it is what the anti-raising materials 5 support by the jack 6 or the support 13 It is not necessary to be a fitting part, and for example, the central part in the longitudinal direction of the erection material 5 may be supported.
[0041]
【The invention's effect】
As explained above, according to the structure of the flank material of the present invention, the following effects can be obtained.
[0042]
1) According to the first aspect of the present invention, since the angling material is formed in a hollow hermetically sealed shape, buoyancy is added in water, and the apparent weight in water is reduced, so that transportation can be facilitated.
[0043]
2) According to the first and second aspects of the present invention, since the specific gravity of the entire irritating material is 1 or less, preferably 0.5 or more and less than 1, it can float in water and the center of gravity is below the water surface. Since it is on the side, it can be stabilized without rotating or the like, and transportation and installation work in water can be facilitated.
[0045]
3) According to the invention described in claim 3 , since the plurality of angry members can be connected by fitting the concave part and the convex part provided in the cap, It can be arranged continuously. In addition, since the plurality of bell-raised materials can be connected and integrated, the bell-raised material can be supported by the minimum support material and jack. Therefore, the number of support members can be reduced, and the installation and disassembly of the support work can be performed in a short time.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a sewage pipe in the case where an erection material according to the present invention is applied to rehabilitation work of a sewage pipe.
FIG. 2 is a plan view of an essential part showing a fitting state of the erection material according to the present invention.
FIG. 3 is a schematic cross-sectional view showing an example of an angry material according to the present invention.
FIG. 4 is a schematic perspective view showing a cap having a concave portion joined to the belly raising material in the present invention.
FIG. 5 is a schematic perspective view showing a cap having a convex portion joined to an erection material according to the present invention.
FIG. 6 is a cross-sectional view of an essential part showing a fitting state of the erection material according to the present invention.
FIG. 7 is a schematic cross-sectional view of the case where the erection material according to the present invention is applied to the earth retaining member.
FIG. 8 is a schematic perspective view in the case where an erection material according to the present invention is applied to a earth retaining member.
FIG. 9 is a cross-sectional view of a hollow cylindrical member according to the present invention.
FIG. 10 is a cross-sectional view of another hollow cylindrical member according to the present invention.
FIG. 11 is a cross-sectional view of another hollow cylindrical member according to the present invention.
FIG. 12 is a plan view (a) showing the main part of the use state when the conventional erection material is applied to the rehabilitation work of the sewer pipe, and a side view (b) showing the main part of another conventional use state. It is.
[Explanation of symbols]
7 Hollow

tubular members

8, 9 Cap 8b Concave part 9b Convex part 10 Joint part

Claims

A tubular member, wale material to this across the opening of the tubular member Ri Do and a cap joined to the gas-watertight, characterized in that the specific gravity of the whole is formed in 1 below.

Wale material according to claim 1, wherein said specific gravity and less than 1 less than 0.5.

The cap has a concave portion or a convex portion in the longitudinal direction of the hollow cylindrical member in a joined state with the hollow cylindrical member, and a plurality of angling materials are formed by fitting the concave portion and the convex portion. 3. An abdominal erection material according to claim 1 or 2 , characterized in that it can be connected.