JPH072783Y2 - Fume tube - Google Patents

Fume tube

Info

Publication number
JPH072783Y2
JPH072783Y2 JP1988160175U JP16017588U JPH072783Y2 JP H072783 Y2 JPH072783 Y2 JP H072783Y2 JP 1988160175 U JP1988160175 U JP 1988160175U JP 16017588 U JP16017588 U JP 16017588U JP H072783 Y2 JPH072783 Y2 JP H072783Y2
Authority
JP
Japan
Prior art keywords
annular frame
frame body
tube
welding
welded
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
Application number
JP1988160175U
Other languages
Japanese (ja)
Other versions
JPH0280276U (en
Inventor
胤行 高橋
Original Assignee
胤行 高橋
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 胤行 高橋 filed Critical 胤行 高橋
Priority to JP1988160175U priority Critical patent/JPH072783Y2/en
Publication of JPH0280276U publication Critical patent/JPH0280276U/ja
Application granted granted Critical
Publication of JPH072783Y2 publication Critical patent/JPH072783Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Excavating Of Shafts Or Tunnels (AREA)

Description

【考案の詳細な説明】 [産業上の利用分野] 本考案は、地下埋設推進工法用のヒューム管に関するも
のである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fume pipe for an underground burial propulsion method.

[従来技術] 第7図に基いて、従来のヒューム管の構造を説明する。
第7図において、1は円筒形状の管体で、該管体1はコ
ンクリート等により高耐圧に形成されている。この管体
1の開口部端縁に鉄板からなる環状枠体2が被設されて
いる。この環状枠体2は、短冊状の鉄板を円環状に曲
げ、その両端部3、4を第7図に示した如く、開先をと
った上で突合せ溶接されていた。5は突合せ溶接部分を
示す。
[Prior Art] The structure of a conventional fume tube will be described with reference to FIG.
In FIG. 7, reference numeral 1 denotes a cylindrical tubular body, and the tubular body 1 is made of concrete or the like with high pressure resistance. An annular frame body 2 made of an iron plate is provided on the edge of the opening of the tube body 1. The annular frame 2 was formed by bending a strip-shaped iron plate into an annular shape, and butt-welding both ends 3 and 4 of the groove as shown in FIG. 5 shows a butt welding part.

そして、第8図に示すように、1つのヒューム管の環状
枠体2の突出部の内周に他のヒューム管の基端部を嵌合
しながら多数のヒューム管が直列に土中を推進しながら
連結され、地下に埋設される。
Then, as shown in FIG. 8, a large number of fume pipes are propelled in the soil in series while fitting the base ends of the other fume pipes to the inner circumference of the protruding portion of the annular frame body 2 of one fume pipe. While being connected, it is buried underground.

[考案が解決しようとする課題] ところで、管体1内を流体が流通することによって内圧
が増加すると、その圧力増加が環状枠体2を拡張する。
この拡張が限度を越えると突合せ溶接部分5が分離破断
する問題がある。また、ヒューム管連結時に第8図に符
号10で示すような砂利が混入すると前記溶接部分の接合
強度が弱いため枠体2は容易に分離するという問題もあ
る。
[Problems to be Solved by the Invention] By the way, when the internal pressure increases due to the fluid flowing through the pipe body 1, the increase in pressure expands the annular frame body 2.
If this expansion exceeds the limit, there is a problem that the butt welded portion 5 is separated and fractured. Further, when the fume pipe is connected, if gravel as shown in FIG. 8 is mixed, the joint strength of the welded portion is weak and the frame 2 is easily separated.

本考案の目的は、内圧増加等に対して前記環状枠体が破
断しにくく、全体として耐久性の向上したヒューム管を
提供せんとするものである。
An object of the present invention is to provide a fume tube in which the annular frame does not easily break due to an increase in internal pressure and the like, and which has improved durability as a whole.

[課題を解決するための手段] 上記目的を達成するため、本考案に係るヒューム管は、
管体と、この管体の開口部端縁に被設された環状枠体と
を備え、該環状枠体は長尺な鋼板を環状に曲げて両端部
が溶接されているヒューム管において、溶接される鋼板
の前記両端部は互いに噛合する凹凸形状に形成されると
ともに、前記環状枠体の前記管体と干渉する内周面には
複数のピンが突設されているものである。
[Means for Solving the Problems] In order to achieve the above object, the fume tube according to the present invention comprises:
A fume tube having a tubular body and an annular frame body provided at an opening edge of the tubular body, the annular frame body being formed by bending a long steel plate into an annular shape and welding both ends thereof to each other in a fume pipe; The both ends of the steel plate are formed in a concavo-convex shape that meshes with each other, and a plurality of pins are projectingly provided on the inner peripheral surface of the annular frame that interferes with the tubular body.

ここで、凸部は先端に向って幅広となり、それに対応し
て凹部は奥に向って幅広となる形状にするのがよい。そ
れを噛合することにより接合強度が増加する。
Here, it is preferable that the convex portion is widened toward the tip and the concave portion is correspondingly widened toward the back. The joint strength is increased by engaging them.

[作用] 鋼板の両端の凹凸部分を互いに噛合させた上で溶接する
と、両端の溶接長さ及び接触面積が、単純な平坦面同士
を突合せた場合に比して大幅に増加させることができ、
その結果、溶接された状態において内圧等による拡張力
が加わっても、前記接触面積の増加によって破断抵抗が
増し、全体として耐圧性が増加する。さらに本考案によ
れば、環状枠体の管体と干渉する内周面には複数のピン
が突設されているので、この環状枠体を前記管体に被設
した際に、複数のピンが管体に食い込む状態となり、環
状枠体の内周面が平滑なものに比し、より強固に環状枠
体が管体に被設される。
[Operation] When the concavo-convex portions on both ends of the steel plate are meshed with each other and then welded, the welding length and contact area at both ends can be significantly increased as compared with a case where simple flat surfaces are butted.
As a result, even if an expanding force due to internal pressure is applied in the welded state, the rupture resistance increases due to the increase in the contact area, and the pressure resistance as a whole increases. Further, according to the present invention, since a plurality of pins are provided on the inner peripheral surface of the annular frame, which interferes with the tubular body, a plurality of pins are provided when the annular frame is attached to the tubular body. Is in a state of biting into the tubular body, and the annular frame body is more firmly attached to the tubular body as compared with a case where the inner peripheral surface of the annular frame body is smooth.

[実施例] 以下、本考案の一実施例を第1図乃至第3図に基いて説
明する。環状枠体2を構成する長尺の鋼板の両端部3、
4は凹凸形状で且つ互いに噛合するよう形成されてい
る。この実施例では、両端部の凸部が先端に向って幅広
となり、これに伴い隣接する凸部間の凹部が奥側に向っ
て幅広となる形状となっている。これにより、両端部
3、4を噛合させた状態では、両端部の凸部が互いに環
状枠体の周方向に係合し、該枠体2の周方向への引張り
力が加わっても分離することがなくなる。この噛合状態
に加え、第3図に示すように両端部3、4の端縁は開先
加工され、符号5で示すように互いに溶接されて一体化
される。なお、製造上、強度上の視点から、凸部(凹
部)の両側縁の鋼板長手方向に対する傾斜角αは約45度
とするのが好適である。また、両端部3、4の噛合接触
部に沿って溶接を施すので、溶接部分5の面積が従来の
単なる突合せ溶接に比して増大し、よって剪断強度も増
大する。
[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Both ends 3 of a long steel plate forming the annular frame 2,
Reference numeral 4 is an uneven shape and is formed so as to mesh with each other. In this embodiment, the projections at both ends widen toward the tip, and accordingly, the recesses between the adjacent projections widen toward the back side. As a result, when both ends 3 and 4 are engaged with each other, the projections at both ends engage with each other in the circumferential direction of the annular frame body, and separate even if a tensile force in the circumferential direction of the frame body 2 is applied. Will disappear. In addition to this meshed state, as shown in FIG. 3, the edges of both end portions 3 and 4 are groove-processed and welded to each other as indicated by reference numeral 5 to be integrated. From the viewpoint of manufacturing and strength, it is preferable that the inclination angle α of both side edges of the convex portion (concave portion) with respect to the longitudinal direction of the steel plate is about 45 degrees. Further, since welding is performed along the meshing contact portions of the both end portions 3 and 4, the area of the welded portion 5 is increased as compared with the conventional butt welding, and thus the shear strength is also increased.

管体1内の圧力増大などにより拡張力が環状枠体2に加
わっても、該枠体は引っ張り及び剪断強度が増している
ため、容易には破断しない。一般に溶接のみによる従来
構造のものでは、破断に対する平均強度はJIS3106でSM5
0Cの場合、390〜470N・kg/mm2と計算されているが、実
験的に確かめたところ平均強度は385N・kg/mm2であっ
た。それに対して、前述の実施例に係る環状枠体の平均
強度は460N・kg/mm2に向上し、構造体素材である鉄その
ものの強度にも匹敵するものとなり、製品としての強度
的信頼性を著しく増大させることに成功した。
Even if an expanding force is applied to the annular frame body 2 due to an increase in pressure in the tube body 1 or the like, the frame body does not easily break because the frame body has increased tensile strength and shear strength. Generally, in the conventional structure with only welding, the average strength against breakage is JIS3106 SM5.
For 0C, has been calculated to 390~470N · kg / mm 2, the average strength was experimentally confirmed was 385N · kg / mm 2. On the other hand, the average strength of the annular frame body according to the above-mentioned embodiment is improved to 460 Nkg / mm 2 , which is comparable to the strength of iron itself which is the structural material, and the strength reliability as a product. Has been significantly increased.

尚、環状枠体の製造方法としては、両端部を凹凸形状に
剪断加工した長尺な鋼板(第10図参照)を、3本ロール
機により円環状に曲加工し、その後、両端部を噛合さ
せ、CO2アーク溶接(GMAW)にて溶接した。
The manufacturing method of the annular frame is as follows. Long steel plate with both ends sheared into uneven shapes (see Fig. 10) is bent into an annular shape by a three-roll machine, and then both ends are engaged. And welded by CO 2 arc welding (GMAW).

第4図乃至第6図は、前記凹凸形状がそれぞれ異なる他
実施例を示す要部正面図である。尚、本考案の凹凸形状
はこれらのものに限定されないことは勿論である。第6
図に示した如く、異なる形状の凹凸を混在させたもので
もよく、更に後述の第9図に示すように単なる山形また
は矩形の凹凸形状としても良い。
FIGS. 4 to 6 are front views of main parts showing other embodiments in which the uneven shapes are different from each other. Needless to say, the concavo-convex shape of the present invention is not limited to these. Sixth
As shown in the figure, different shapes of unevenness may be mixed, and as shown in FIG. 9 to be described later, a simple mountain-shaped or rectangular uneven shape may be used.

第9図には、第2図に示した環状枠体2の内面にスタッ
ドピン6を多数設け、枠体2が管体から離脱するのを防
止した実施例を示されている。従来は、長尺な丸鋼を枠
体2の内周に周方向に沿って溶接固定し、これにより、
当該環状枠体2が管体1から不用意に外れないようにし
ていたが、推進作業時の土砂の圧力により丸鋼が枠体か
ら分離し易く、未だ充分なものとは言えなかった。本実
施例では、長尺な丸鋼に換え、前記スタッドピン6を複
数圧接熔着したので、各スタッドピン6と枠体2との接
着強度が増大し、各スタッドピン6が管体1に食込み状
態となるので環状枠体2が埋設時の土砂抵抗を大きく受
けても、不用意に管体1から離脱する恐れを低減でき
る。また、スタッドピン6の熔着にスタッドウェルダー
を利用でき、その溶接作業は長尺な丸鋼を溶接する場合
と比較して極めて容易である。
FIG. 9 shows an embodiment in which a large number of stud pins 6 are provided on the inner surface of the annular frame body 2 shown in FIG. 2 to prevent the frame body 2 from coming off the tube body. Conventionally, long round steel is welded and fixed to the inner circumference of the frame body 2 along the circumferential direction, whereby
Although the annular frame 2 was prevented from being unintentionally detached from the tube 1, the round steel was easily separated from the frame due to the pressure of earth and sand during the propulsion work, and it could not be said to be sufficient. In this embodiment, since a plurality of stud pins 6 are welded by pressure welding instead of long round steel, the adhesive strength between each stud pin 6 and the frame body 2 is increased, and each stud pin 6 is attached to the tube body 1. Since it is in the bite state, even if the annular frame 2 receives a large amount of earth and sand resistance at the time of burying, it is possible to reduce the risk of accidentally detaching from the tube 1. Further, a stud welder can be used for welding the stud pin 6, and its welding operation is extremely easy as compared with the case of welding a long round steel bar.

第10図は、第9図の環状枠体2を展開した状態の平面図
を示し、スタッドピン6は管体との干渉部分にのみ配設
されている。本実施例の枠体2は、例えば全長Lが3072
mm、幅Wは240〜250mm、スタッドピン間の間隔lは95m
m、板厚は4.5mm、幅方向のスタッドピン間の距離は70m
m、が好適である。
FIG. 10 shows a plan view of the annular frame body 2 of FIG. 9 in a developed state, and the stud pins 6 are provided only at the portions where they interfere with the pipe body. The frame body 2 of this embodiment has a total length L of 3072, for example.
mm, width W 240 to 250 mm, stud pin spacing l is 95 m
m, thickness is 4.5 mm, distance between stud pins in the width direction is 70 m
m is preferred.

第11図ないし第13図にはそれぞれスタッドピン6の例が
示されている。第11図に示すのは、コンクリート製の管
体1に食い込む部分が円柱状のものを示し、第12図に示
すのは、該部分が段付きのものを示し、第13図に示すの
は、該部分の頂部にフンラジを形成したものを示してい
る。管体1への食い込みによる確実なスタッドピンの固
定を考慮した場合は第12図または第13図のものが好適で
ある。なお、符号12で示す部分は枠体2への熔着部を示
す。
11 to 13 show examples of the stud pin 6, respectively. FIG. 11 shows that the part that bites into the concrete pipe body 1 is cylindrical, FIG. 12 shows that the part is stepped, and FIG. 13 shows , The one in which a funraji is formed on the top of the portion is shown. Considering the reliable fixation of the stud pin by biting into the pipe body 1, the one shown in FIG. 12 or FIG. 13 is preferable. The part indicated by reference numeral 12 is a welded portion to the frame body 2.

[効果] 本考案によれば、凹凸形状の両端部を噛合させて、溶接
してあるため、環状枠体に拡張力が加わっても、容易に
は分離したり破断しない。これによって製品全体として
の耐圧性を向上することができ、信頼性を高めることが
できる。
[Effects] According to the present invention, since both ends of the uneven shape are meshed and welded, even if an expanding force is applied to the annular frame, they are not easily separated or broken. As a result, the pressure resistance of the entire product can be improved and the reliability can be improved.

【図面の簡単な説明】[Brief description of drawings]

第1図は本考案に係るヒューム管の一実施例を示す斜視
図、第2図は同実施例の環状枠体の連結部の拡大平面
図、第3図は第2図のIII−III線に沿う断面図、第4図
乃至第6図はそれぞれ異なる実施例を示す要部平面図、
第7図は従来のヒューム管の斜視図、第8図は同要部の
断面図、第9図は本考案の他の実施例を示す斜視図、第
10図は第9図のものの展開図、第11図ないし第13図はス
タッドピンの変形例をそれぞれ示す正面図である。 1……管体 2……環状枠体 5……溶接部分
FIG. 1 is a perspective view showing an embodiment of a fume tube according to the present invention, FIG. 2 is an enlarged plan view of a connecting portion of an annular frame body of the same embodiment, and FIG. 3 is a III-III line in FIG. And FIG. 4 to FIG. 6 are cross-sectional views taken along the line of FIG.
FIG. 7 is a perspective view of a conventional fume tube, FIG. 8 is a cross-sectional view of the relevant portion, and FIG. 9 is a perspective view showing another embodiment of the present invention.
FIG. 10 is a development view of that of FIG. 9, and FIGS. 11 to 13 are front views showing modified examples of the stud pin. 1 ... Tube 2 ... Annular frame 5 ... Welded part

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】管体と、この管体の開口部端縁に被設され
た環状枠体とを備え、該環状枠体は長尺な鋼板を環状に
曲げて両端部が溶接されているヒューム管において、溶
接される鋼板の前記両端部は互いに噛合する凹凸形状に
形成されるとともに、前記環状枠体の前記管体と干渉す
る内周面には複数のピンが突設されていることを特徴と
するヒューム管。
1. A tubular body and an annular frame body provided at an end edge of an opening of the tubular body, the annular frame body being formed by bending a long steel plate into an annular shape and welding both ends thereof. In the fume tube, the both ends of the steel plate to be welded are formed in a concavo-convex shape that meshes with each other, and a plurality of pins are projectingly provided on the inner peripheral surface of the annular frame body that interferes with the tube body. Fume tube characterized by.
JP1988160175U 1988-12-09 1988-12-09 Fume tube Expired - Lifetime JPH072783Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988160175U JPH072783Y2 (en) 1988-12-09 1988-12-09 Fume tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988160175U JPH072783Y2 (en) 1988-12-09 1988-12-09 Fume tube

Publications (2)

Publication Number Publication Date
JPH0280276U JPH0280276U (en) 1990-06-20
JPH072783Y2 true JPH072783Y2 (en) 1995-01-25

Family

ID=31442010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988160175U Expired - Lifetime JPH072783Y2 (en) 1988-12-09 1988-12-09 Fume tube

Country Status (1)

Country Link
JP (1) JPH072783Y2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57118833A (en) * 1981-01-15 1982-07-23 Matsushita Electric Works Ltd Forming method for flaring part of tube
JPS58114982U (en) * 1982-01-29 1983-08-05 新日本製鐵株式会社 Fittings for curved propulsion steel pipes

Also Published As

Publication number Publication date
JPH0280276U (en) 1990-06-20

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