JP3196883B2 - Spacer for sheath tube buried by small diameter propulsion method - Google Patents
Spacer for sheath tube buried by small diameter propulsion methodInfo
- Publication number
- JP3196883B2 JP3196883B2 JP02852496A JP2852496A JP3196883B2 JP 3196883 B2 JP3196883 B2 JP 3196883B2 JP 02852496 A JP02852496 A JP 02852496A JP 2852496 A JP2852496 A JP 2852496A JP 3196883 B2 JP3196883 B2 JP 3196883B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- sheath
- spacer
- propulsion method
- sheath tube
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sewage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、小口径推進工法を
用いて埋設する鞘管用スペ−サに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for a sheath tube to be buried using a small-diameter propulsion method.
【０００２】[0002]
【従来の技術】一般に下水道工事における推進工法は、
開削工法ができない幹線道路や軌道や河川等を横切る横
断工事に採用されているが、この推進工法は開削工法に
比べ、交通の障害にならないことや、騒音や振動等が少
ないことや、経済的であること等の長所によって、縦断
工法にも採用されるようになった。2. Description of the Related Art In general, the propulsion method in sewerage works is
It is used for crossing work across arterial roads, tracks, rivers, etc., where excavation is not possible. Due to such advantages, it has been adopted for the vertical construction method.
【０００３】ところで、この推進工法には各種の工法が
あって、例えば管内で作業が困難で、しかも、危険を伴
うような口径７００ｍｍφ以下の管を埋設する小口径特
殊推進工法（単に小口径推進工法ともいう）と呼ばれる
ものでも、圧入式、ホリゾンタルオ−ガ式、水平バラン
ス式等の各種の工法が開発されている。しかも、この圧
入式工法でも１工程式と２工程式とが開発されている。
因みに、１工程式の圧入式推進工法とは、鋼管を油圧ジ
ャッキで直接押込み、鋼管内の土砂を適宜挿入するオ−
ガによって搬出する工法を指している。したがって、か
かる圧入式小口径推進工法は、推進工法の中でも最も簡
単な工法であるため、軟弱土、砂質等の軟らかい土質に
用いられて前記の長所を発揮している。By the way, there are various methods of this propulsion method, for example, a small-diameter special propulsion method for embedding a pipe having a diameter of 700 mmφ or less, which is difficult and involves danger (simply, a small-diameter propulsion method). Various methods, such as a press-fit type, a horizontal auger type, and a horizontal balance type, have been developed. In addition, a one-step method and a two-step method have been developed in this press-fitting method.
Incidentally, the one-step press-fit type propulsion method is a method in which a steel pipe is directly pushed in with a hydraulic jack and earth and sand in the steel pipe are appropriately inserted.
It refers to the method of carrying out by moth. Therefore, since the press-fitting small-diameter propulsion method is the simplest method among the propulsion methods, it is used for soft soil such as soft soil and sandy soil, and exhibits the above-mentioned advantages.
【０００４】しかし、かかる小口径推進工法では管体を
直接推進させるため、曲線設定が不可能であることや、
施工精度が劣ることや、施工延長が短いこと等の短所を
もっている。However, in such a small-diameter propulsion method, since the pipe is directly propelled, it is impossible to set a curve.
It has disadvantages such as poor construction accuracy and short construction extension.
【０００５】例えば、施工精度が劣ることの要因をみる
と、１）土質条件によるのものとしては、例えば土質の
不均質性や変化によるもの、湧水による推進管の浮上に
よるものがあり、２）障害物によるものとしては、例え
ば杭や旧護岸によるものがあり、３）管および使用機械
によるものとしては、例えは管軸の曲がりや管端面の凹
凸によるもの、使用機械のくせによるもの、油圧ジャッ
キの偏圧によるものがあり、更には、４）施工によるも
のとしては、発進初期の位置や操作の誤りによるものが
ある。したがって、これらの多種多様の要因により、小
口径推進工法は施工精度が劣る、といわれている。[0005] For example, the factors of the poor construction accuracy are as follows: 1) The soil conditions include, for example, the inhomogeneity and change of soil, and the floating of a propulsion pipe due to spring water. ) Obstacles include, for example, piles and old seawalls. 3) Pipes and equipment used include, for example, bending of pipe shafts and unevenness of pipe end faces, and habits of used machinery. There is a case where the pressure of the hydraulic jack is biased, and 4) a case where the construction is carried out is due to an error in the initial position or operation at the time of starting. Therefore, it is said that the construction accuracy of the small-diameter propulsion method is inferior due to these various factors.
【０００６】そのため例えば、口径３００ｍｍφの下水
本管を平坦地に埋設しようとするときには、標準勾配が
４‰とされているが、この勾配を前記のような小口径推
進工法で設定することは容易ではない。Therefore, for example, when sewage main pipes having a diameter of 300 mm are to be buried on flat ground, the standard gradient is set to 4 °, but it is easy to set this gradient by the small-diameter propulsion method as described above. is not.
【０００７】一方、推進工法により埋設された鞘管内
に、所定の勾配をつけた下水管としての内挿管を配管
し、鞘管を小口径化する方法が提案されている（例え
ば、特開昭５３−６９２１号公報）。On the other hand, there has been proposed a method of reducing the diameter of a sheath pipe by laying an intubation pipe as a sewer pipe with a predetermined gradient in a sheath pipe buried by a propulsion method (for example, see Japanese Patent Application Laid-Open Publication No. HEI 9-28139). No. 53-6921).
【０００８】すなわち、この提案では、鞘管内に複数の
内挿管を連結して配管するとき、鍔状スペ−サをそれぞ
れの内挿管に外嵌して、これらのスペ−サにそれぞれ穿
設した内挿管用孔の位置を所定の勾配に合せるようにし
たもので、このスペ−サを内挿管に外嵌・接着してから
順次、この内挿管を鞘管内に挿入して行けば、内挿管に
所定の勾配が得られる、とされている。That is, in this proposal, when a plurality of intubation tubes are connected and piped in a sheath tube, a flange-shaped spacer is externally fitted to each of the intubation tubes, and each of these spacers is perforated. The position of the hole for intubation is adjusted to a predetermined gradient. After this spacer is externally fitted to and adhered to the intubation tube, the intubation tube is sequentially inserted into the sheath tube, and then the intubation tube is inserted. , A predetermined gradient is obtained.
【０００９】そして、この鍔状スペ−サには、片面に内
挿管用孔の偏心量を示す目盛をつけておき、この目盛に
したがって現場で穿孔するようになっている。A scale indicating the eccentricity of the hole for intubation is provided on one side of the flange-shaped spacer, and a hole is drilled on site according to the scale.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、かかる
提案の埋設される鞘管は、水平等の正確な埋設を前提と
するものであるが、小口径推進工法で、特に１工程式の
圧力式小口径推進工法によって鞘管を推進・埋設する
と、前記のような各種の要因により施工精度が劣ること
から、内挿管を支持するスペ−サを、目盛にしたがって
機械的に穿孔した鍔状のものにすれば、現場施工の手直
して慣用としている勾配は得られにくく、また、現場で
スペ−サを穿孔する作業も手間がかかる、という問題が
あった。However, the proposed sheath tube to be buried is supposed to be buried accurately, such as horizontally, but it is a small-diameter propulsion method, in particular, a one-step pressure type small pipe. When the sheath pipe is propelled and buried by the diameter propulsion method, the construction accuracy is inferior due to the various factors as described above, so that the spacer supporting the intubation tube is formed into a flange-shaped one that is mechanically perforated according to the scale. In this case, there is a problem that it is difficult to obtain a gradient that is commonly used by refining the construction at the site, and that it takes time and effort to drill a spacer at the site.
【００１１】そこて本発明は、かかる問題を解決するこ
とを目的とするものである。The present invention is directed to solving such a problem.
【００１２】[0012]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、１）小口径推進工法で直接推進させて埋
設した鞘管と、該鞘管に順次挿入する塩ビ製下水管との
間に設けるスペ−サを、前記下水管に外嵌した鍔体と、
該鍔体の両耳部に設けられ、かつ、前記鞘管の内面にそ
の両端部が切断されて当接する柱状スティと、で構成し
たことを特徴とする小口径推進工法による鞘管用スペ−
サを要旨とし、また、２）小口径推進工法で直接推進さ
せて埋設した鞘管と、該鞘管に順次挿入する塩ビ製下水
管との間に設けるスペ−サを、前記下水管に外嵌した鍔
体と、該鍔体の両耳部にそれぞれ噛み合い、かつ、その
両端部が前記鞘管の内面に当接する柱状スティと、で構
成したことを特徴とする小口径推進工法による鞘管用ス
ペ−サを要旨とするものである。In order to achieve the above object, the present invention provides: 1) a sheath pipe directly propelled by a small-diameter propulsion method and buried, and a PVC sewer pipe sequentially inserted into the sheath pipe. A spacer provided between, a collar body externally fitted to the sewer pipe,
And a columnar stay provided at both ears of the flange body and having both ends cut and abutted on the inner surface of the sheath tube, the space for a sheath tube by a small-diameter propulsion method.
2) A spacer provided between a sheath pipe directly propelled by the small-diameter propulsion method and buried and a PVC drain pipe sequentially inserted into the sheath pipe is attached to the drain pipe. A sheath with a small-diameter propulsion method, comprising: a fitted flange body; The subject matter is a space.
【００１３】[0013]
【発明の実施の形態】本発明を、添付図面に示す、その
実施の形態例により詳細に述べる。図１は本発明の第１
の実施の形態例の全体斜視図、図２は図１の要部図で、
（Ａ）は全体図、（Ｂ）はＡ部の側面図、（Ｃ）は
（Ｂ）図のＢ〜断面図、図３は第２の実施の形態例の斜
視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 shows the first embodiment of the present invention.
FIG. 2 is a main part view of FIG. 1 and FIG.
(A) is an overall view, (B) is a side view of a part A, (C) is a cross-sectional view of B-B in FIG. (B), and FIG. 3 is a perspective view of the second embodiment.
【００１４】本実施の形態例は、小口径推進工法、特に
１工程式の圧入式推進工法を用いて、口径３００ｍｍφ
の鋼管製鞘管を河川等を横断する工事のために好都合で
あるが、ヒュ−ム管製鞘管を他の工法、例えばスクリュ
−形の水平穿孔機で穿孔しながら土砂をオ−ガで排出
し、このオ−ガの管体にヒュ−ム管を接続して推進させ
るホリゾンタルオ−ガ工法であってもよく、また、先導
管やガイド管やパイロット管ともいわれるリ−ド管を押
込み、このリ−ド管に続いて鞘管を推進させる２工程式
の圧入式小口径推進工法で、しかも、縦断工事であって
もよい。The present embodiment employs a small-diameter propulsion method, in particular, a one-step press-fit type propulsion method, with a diameter of 300 mm.
It is convenient for the construction of a steel pipe sheath pipe for crossing a river or the like, but the soil and sand are auged while drilling the hume pipe sheath pipe by another method, for example, a screw type horizontal drilling machine. It may be a horizontal auger method of discharging and connecting a hume pipe to the auger body, and pushing a lead pipe also called a leading pipe, a guide pipe or a pilot pipe. A two-step press-fit type small-diameter propulsion method in which a sheath pipe is propelled following the lead pipe, and may be a vertical construction.
【００１５】図１において、１は鞘管であって、発進立
坑の巾を小にして、しかも、小型の油圧ジャッキ（叩打
機、またはハンマ−ともいう）を用いるため（いずれも
図示しない）、この鞘管１の１つは、その管有効長を約
７００ｍｍとし、しかも、受口２をもつ鋼管にしてい
る。したがって、この鞘管１の一端には受口２を、他端
には挿口３をそれぞれ形成している。そして、この受口
２には、通常環状凹溝があって、この環状凹溝に環状パ
ッキンが装着されるが、この受口付鋼管は鞘管１に用い
るので、環状パッキンを設けなくてもよい。In FIG. 1, reference numeral 1 denotes a sheath tube, which reduces the width of a starting shaft and uses a small hydraulic jack (also referred to as a hitting machine or a hammer) (both are not shown). One of the sheath tubes 1 is a steel tube having an effective tube length of about 700 mm and having a receiving port 2. Therefore, a receiving port 2 is formed at one end of the sheath tube 1 and an insertion port 3 is formed at the other end. The socket 2 usually has an annular groove, and an annular packing is attached to the annular groove. However, since the steel pipe with the socket is used for the sheath tube 1, it is not necessary to provide the annular packing. Good.
【００１６】そこで、多数の鞘管１を不図示の油圧ジャ
ッキにより受口２を先行側にして、発進立坑から地山に
順次打ち込み連結し、つまり、下流側から順次打ち込
み、到達立坑まで推進させて貫通すると、この鞘管１の
布設は完了する。この鞘管１は所定の勾配をつけて推進
させてもよいが、油圧ジャッキで鞘管１を直接推進させ
るため、水平状に推進させている。勿論、その施工精度
が劣ることは止むを得ない。In view of the above, a large number of sheath pipes 1 are sequentially driven and connected from the starting shaft to the ground with the receiving port 2 as the leading side by a hydraulic jack (not shown). Piercing the sheath tube 1 is completed. The sheath tube 1 may be propelled with a predetermined gradient. However, since the sheath tube 1 is directly propelled by a hydraulic jack, the sheath tube 1 is propelled horizontally. Of course, it is unavoidable that the construction accuracy is inferior.
【００１７】次いで、この埋設された鞘管１に内挿管、
すなわち、呼び径１５０ｍｍφの多数の規格化され、多
用されている安価な下水本管４を順次挿入する。勿論、
特別に製造された下水本管を用いてもよい。この下水本
管４の１つは管有効長６００ｍｍとし、受口５付の塩ビ
管にしている。したがって、この下水本管４の一端には
受口５を、他端には差し口６をそれぞれ形成している。
そして、その受口５は、いわゆる首振り可能の取付管用
ゴム輪受口、首振り困難な本管用ゴム輪受口または接着
接合用受口のいずれかに形成している。前２者の場合、
受口５には環状凹溝５Ａが形成されていて、この環状凹
溝５Ａにゴム輪（不図示）が装着されている。Next, an inner tube is inserted into the buried sheath tube 1,
That is, a large number of standardized and widely used inexpensive sewage main pipes 4 having a nominal diameter of 150 mmφ are sequentially inserted. Of course,
Specially manufactured sewage mains may be used. One of the sewage main pipes 4 has a pipe effective length of 600 mm and is a PVC pipe with a receiving port 5. Therefore, the receiving port 5 is formed at one end of the sewage main pipe 4, and the outlet 6 is formed at the other end.
The socket 5 is formed in any of a so-called swingable rubber ring socket for a mounting pipe, a hard rubber ring socket for a main pipe, and an adhesive bonding socket. In the case of the former two,
An annular groove 5A is formed in the receiving port 5, and a rubber ring (not shown) is attached to the annular groove 5A.
【００１８】この下水本管４を鞘管１に挿入するには、
前記の油圧ジャッキまたは人力によって受口５を先行側
にして順次挿入して連結する。To insert the sewage main pipe 4 into the sheath pipe 1,
The receptacle 5 is inserted and connected sequentially with the receiving port 5 as the leading side by the above-mentioned hydraulic jack or human power.
【００１９】ここにおいて、この下水本管４には、次の
ような樹脂（例えば、ＰＰ，ＡＢＳ等）製スペ−サ７を
用いている。すなわち、図１および図２において、この
下水本管４は呼び径１５０ｍｍφであるので、外径は約
１６５ｍｍφになっている。そこで、このスペ−サ７
は、この外径の下水本管４が内嵌される鍔状の本体８
と、この本体８の両側に一体的に設けた耳部９，９と、
この両耳部９，９の端面に形成した鋸歯部１０と、この
鋸歯部１０に噛合う鋸歯部１１を形成した１対の柱状ス
ティ１２，１２と、これらの柱状スティ１２を緊縛する
上下１対のゴムバンド１３，１３と、から構成してい
る。この柱状スティ１２の上下端には、鞘管１の内面に
当接して沿うような傾斜面１４をそれぞれ形成してい
る。Here, a spacer 7 made of the following resin (for example, PP, ABS, etc.) is used for the sewage main pipe 4. That is, in FIGS. 1 and 2, since the sewage main pipe 4 has a nominal diameter of 150 mmφ, the outer diameter is about 165 mmφ. Therefore, this spacer 7
Is a flange-shaped main body 8 into which the sewage main pipe 4 is fitted.
And ears 9, 9 provided integrally on both sides of the main body 8,
Saw tooth portions 10 formed on the end faces of the both ear portions 9, 9, a pair of columnar stays 12, 12 having a saw tooth portion 11 meshed with the saw tooth portion 10, and upper and lower portions 1 for binding these columnar stays 12. And a pair of rubber bands 13. At the upper and lower ends of the columnar stay 12, inclined surfaces 14 are formed so as to be in contact with and along the inner surface of the sheath tube 1.
【００２０】前記耳部９の外端面に形成した鋸歯部１０
は、上下方向に２列に形成され、しかも、これらの２列
の中間で、その上下中央部にガイド片１５を一体的に突
設している。一方、前記柱状スティ１２に形成した鋸歯
部１１も上下方向に２列に形成して、前記鋸歯部１０と
噛合っており、しかも、これらの２列の中間部には、前
記ガイド片１５が上下摺動するガイド溝１６を貫通して
形成している。したがって、これらのガイド片１５とガ
イド溝１６とにより、鋸歯部１０，１１の噛合の整合性
を良好にして、デリケ−トな勾配の確保を良好にしてい
る。A saw tooth portion 10 formed on the outer end surface of the ear portion 9
Are formed in two rows in the up-down direction, and a guide piece 15 is integrally protruded from the middle of the two rows at the center in the up-down direction. On the other hand, the saw-tooth portions 11 formed on the columnar stays 12 are also formed in two rows in the vertical direction and are engaged with the saw-tooth portions 10, and the guide piece 15 is provided at an intermediate portion between these two rows. It is formed through a guide groove 16 that slides up and down. Therefore, the guide piece 15 and the guide groove 16 make the meshing consistency of the sawtooth portions 10 and 11 good, and the delicate gradient is ensured well.
【００２１】したがって、１つの下水本管４の中央部に
本体８を外嵌した後、両耳部９の鋸歯部１０にそれぞれ
柱状スティ１２の鋸歯部１１を噛合せる。その噛合せ位
置の調節によって、連結した下水本管４に所定の勾配を
もたせる。次いで、１対のゴムバンド１３を掛けて本体
８と柱状スティ１２とを緊縛する。すなわち、耳部９と
柱状スティ１２とは噛合い接合する。このスペ−サ７を
装着した下水本管４を、受口５を先行側にして油圧ジャ
ッキまたは人力により、既に挿入された他の下水本管４
の差し口６に挿入して連結して鞘管１に挿入する。更
に、他の下水本管４の受口５を挿入して連結し、これを
繰り返して下水本管４の布設を完了する。Therefore, after the main body 8 is externally fitted to the central portion of one sewage main pipe 4, the saw tooth portions 11 of the columnar stays 12 are respectively engaged with the saw tooth portions 10 of the both ear portions 9. By adjusting the meshing position, the connected sewer main pipe 4 is given a predetermined gradient. Next, the main body 8 and the columnar stay 12 are tightened by hanging a pair of rubber bands 13. That is, the ear 9 and the columnar stay 12 are engaged with each other. The sewage main pipe 4 with the spacer 7 attached thereto is inserted into the other sewage main pipe 4 already inserted by a hydraulic jack or manually with the receiving port 5 as a leading side.
And inserted into the sheath tube 1. Further, the receptacle 5 of the other sewage main pipe 4 is inserted and connected, and this is repeated to complete the installation of the sewage main pipe 4.
【００２２】なお、鞘管１の推進に直進性を損なうこと
があれば、下水本管４に装着するスペ−サ７は、所定の
勾配を形成するものと、施工不良補正を形成するものと
に分けて交互に鞘管１に挿入すればよい。また、柱状ス
ティ１２の代りに、後記のボルト２０を用いてもよい。If the straightness of the sheath pipe 1 is impaired, the spacer 7 attached to the sewage main pipe 4 may be one having a predetermined gradient and one having a construction error correction. And inserted alternately into the sheath tube 1. Further, instead of the columnar stay 12, a bolt 20 described later may be used.
【００２３】次に、第２の実施の形態例のスペ−サ１７
について述べる。図３において、このスペ−サ１７は、
樹脂（例えば、ＰＰ，ＡＢＳ等）製の２つ割りバンド１
８，１８で下水本管４を挟むように構成し、これらの２
つ割りバンド１８の合せ部１９を締付ける、長寸のボル
ト２０の両端を鞘管１の内面に当接するようにしてい
る。したがって、ボルト２０を合せ部１９に挿通して、
これらの合せ部１９を、ボルト２０に螺合した上下２つ
のナット２１，２１により締付ける（上下のナット２１
の１つはロックナットの作用をする）と、２つ割りバン
ド１８の合せ部１９が締付けられると共に、下水本管４
を挟む上下の位置が決められる。Next, the spacer 17 of the second embodiment will be described.
Is described. In FIG. 3, this spacer 17 is
Split band 1 made of resin (for example, PP, ABS, etc.)
8 and 18, the sewage main pipe 4 is sandwiched between them.
Both ends of a long bolt 20 for fastening the joining portion 19 of the split band 18 are made to abut on the inner surface of the sheath tube 1. Therefore, the bolt 20 is inserted through the joint 19,
These joining portions 19 are tightened by two upper and lower nuts 21 and 21 screwed to the bolt 20 (the upper and lower nuts 21 and 21).
One of them acts as a lock nut), and the joining portion 19 of the split band 18 is tightened, and the sewage main pipe 4
The upper and lower positions sandwiching are determined.
【００２４】すなわち、下水本管４を挟む２つ割りバン
ド１８の上下の位置を、下水本管４の所定の勾配に合せ
るようナット２１で調節する。That is, the upper and lower positions of the halved band 18 sandwiching the sewer main pipe 4 are adjusted with the nut 21 so as to match a predetermined gradient of the sewer main pipe 4.
【００２５】この第２の実施の形態例のスペ−サ１７に
よれば、所定の勾配を出す調節がスパナ掛けですみ、そ
の作業が容易になる。According to the spacer 17 of the second embodiment, the adjustment for providing a predetermined gradient can be performed by using a spanner, and the operation is facilitated.
【００２６】なお、第１および第２の実施の形態例のス
ペ−サ７，１７により所定の勾配が得られた下水本管４
と鞘管１との間の空間には、発泡ポリウレタン、コンク
リ−トセメントミルク、またはエア−モルタル等の充填
剤を注入すれば、所定の勾配が更に固定化できる。この
際、充填剤が硬化型のものでは、硬化する迄、下水本管
４の浮上をスペ−サ７で防止できる。The main sewage pipe 4 having a predetermined gradient obtained by the spacers 7 and 17 of the first and second embodiments.
By injecting a filler such as foamed polyurethane, concrete cement milk, or air-mortar into the space between the tube and the sheath tube 1, a predetermined gradient can be further fixed. At this time, if the filler is of a hardening type, the floating of the sewage main pipe 4 can be prevented by the spacer 7 until the filler is hardened.
【００２７】勿論、前記鞘管１や下水本管４の大きさ寸
法は例示であって、適宜変更できるものである。Of course, the dimensions of the sheath pipe 1 and the sewage main pipe 4 are merely examples, and can be changed as appropriate.
【００２８】また、スペ−サを鍔体の両側に一体的に設
けた柱状スティとし、この柱状スティの先端を、現場で
適宜切断して勾配等に合せてもよい。すなわち、柱状ス
ティを予め長寸に形成しておき、現場で鞘管の施工精度
の補正に対応して適宜切断するものとしてもよい。Alternatively, the spacer may be a columnar stay integrally provided on both sides of the flange body, and the tip of the columnar stay may be appropriately cut on site to conform to the gradient or the like. That is, the columnar stay may be formed in a long dimension in advance, and may be appropriately cut on site in accordance with the correction of the construction accuracy of the sheath tube.
【００２９】勿論、本発明は下水本管４の布設のみに限
らず、取付管であってもよいし、また、上流側を発進立
坑としてもよい。Of course, the present invention is not limited to the laying of the sewage main pipe 4, but may be an installation pipe or an upstream shaft may be a starting shaft.
【００３０】[0030]
【発明の効果】本発明によれば、小口径推進工法により
鞘管を推進させて、スペ−サによって下水本管に所定の
勾配が得られ、しかも、鞘管の直進性不良も補正できる
ので、小口径推進工法の工事費を安く、かつ、簡易化で
きる。しかも、上下方向調節可能の柱状スティを用いて
いるので、現場施工の手直しに対応して容易に調節でき
る。つまり、本来、設計図通りいかない下水道工事に好
都合となる。According to the present invention, the sheath pipe is propelled by the small-diameter propulsion method, and a predetermined gradient can be obtained in the sewage main pipe by the spacer, and the poor straightness of the sheath pipe can be corrected. The construction cost of the small-diameter propulsion method can be reduced and simplified. In addition, since the column-shaped stay that can be adjusted in the vertical direction is used, it can be easily adjusted in response to rework of on-site construction. In other words, it is convenient for sewerage works that originally do not follow the design drawings.
【図１】本発明の第１の実施の形態例の全体斜視図であ
る。FIG. 1 is an overall perspective view of a first embodiment of the present invention.
【図２】図１の要部図で（Ａ）は全体図、（Ｂ）はＡ部
の側面図、（Ｃ）は（Ｂ）図のＢ〜断面図である。2 (A) is an overall view, FIG. 2 (B) is a side view of a portion A, and FIG. 2 (C) is a cross-sectional view of FIG.
【図３】第２の実施の形態例の斜視図である。FIG. 3 is a perspective view of a second embodiment.
１…鞘管、４…下水本管、５…受口、６…差し口、７，
１７…スペ−サ、８…本体、１２…柱状スティ、２０…
ボルト、２１…ナットDESCRIPTION OF SYMBOLS 1 ... sheath pipe, 4 ... sewer main pipe, 5 ... receptacle, 6 ... outlet, 7,
17 ... spacer, 8 ... body, 12 ... columnar stay, 20 ...
Bolt, 21 ... nut
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 1/00 F16L 1/024 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) F16L 1/00 F16L 1/024
Claims (2)
た鞘管と、該鞘管に順次挿入する塩ビ製下水管との間に
設けるスペ−サを、前記下水管に外嵌した鍔体と、該鍔
体の両耳部に設けられ、かつ、前記鞘管の内面にその両
端部が切断されて当接する柱状スティと、で構成したこ
とを特徴とする小口径推進工法による鞘管用スペ−サ。1. A flange body externally fitted to said sewer pipe, wherein a spacer provided between a sheath pipe directly buried and buried by a small-diameter propulsion method and a polyvinyl chloride sewer pipe sequentially inserted into the sheath pipe is provided. And a columnar stay provided at both ears of the collar body and having both ends cut and abutted on the inner surface of the sheath tube. -Sa.
た鞘管と、該鞘管に順次挿入する塩ビ製下水管との間に
設けるスペ−サを、前記下水管に外嵌した鍔体と、該鍔
体の両耳部にそれぞれ噛み合い、かつ、その両端部が前
記鞘管の内面に当接する柱状スティと、で構成したこと
を特徴とする小口径推進工法による鞘管用スペ−サ。2. A flange body externally fitted to the sewer pipe, the spacer being provided between a sheath pipe directly propelled and buried by a small-diameter propulsion method and a polyvinyl chloride sewer pipe sequentially inserted into the sheath pipe. And a pillar-shaped stay that meshes with both ears of the collar body and that has both ends abutting against the inner surface of the sheath tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02852496A JP3196883B2 (en) | 1996-01-22 | 1996-01-22 | Spacer for sheath tube buried by small diameter propulsion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02852496A JP3196883B2 (en) | 1996-01-22 | 1996-01-22 | Spacer for sheath tube buried by small diameter propulsion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09196232A JPH09196232A (en) | 1997-07-29 |
| JP3196883B2 true JP3196883B2 (en) | 2001-08-06 |
Family
ID=12251064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02852496A Expired - Lifetime JP3196883B2 (en) | 1996-01-22 | 1996-01-22 | Spacer for sheath tube buried by small diameter propulsion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3196883B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6954753B2 (en) * | 2017-03-22 | 2021-10-27 | 株式会社栗本鐵工所 | Tube lifting device |
-
1996
- 1996-01-22 JP JP02852496A patent/JP3196883B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09196232A (en) | 1997-07-29 |
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