JPH08145278A - Protection cover for underground pipe or tube - Google Patents
Protection cover for underground pipe or tubeInfo
- Publication number
- JPH08145278A JPH08145278A JP6291782A JP29178294A JPH08145278A JP H08145278 A JPH08145278 A JP H08145278A JP 6291782 A JP6291782 A JP 6291782A JP 29178294 A JP29178294 A JP 29178294A JP H08145278 A JPH08145278 A JP H08145278A
- Authority
- JP
- Japan
- Prior art keywords
- protective cover
- gas pipe
- excavation
- underground
- length
- 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.)
- Pending
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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガス管など地中埋設管
の保護カバーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective cover for underground pipes such as gas pipes.
【０００２】[0002]
【従来の技術】一般にガス管など地中埋設管（以後単に
ガス管と記すこともある）は、埋設後の工事による掘削
によって損傷や破損を受ける度合が高いので、保護カバ
ーが設けられている。2. Description of the Related Art Generally, underground pipes such as gas pipes (which may be simply referred to as gas pipes hereinafter) are highly likely to be damaged or damaged by excavation due to construction after burial, and therefore have a protective cover. .
【０００３】図７は、開削工法における従来技術のガス
管用保護カバーの装着状況を簡略化して示す斜視図であ
る。ガス管１の埋設工法としては、掘削機たとえばバッ
クホウと呼ばれるドラグショベルなどで掘削した溝２に
ガス管１を敷設する開削工法が一般的に行われている。
その場合、ガス管１は溝２内に露出した状態で敷設され
るので、保護カバー３は容易にガス管１に取付けること
ができる。従来ガス管を保護する保護カバーとしては、
たとえば実公平２−２８８１５号公報に開示されている
考案が知られている。FIG. 7 is a perspective view showing a simplified state of mounting a conventional protective cover for a gas pipe in an excavation method. As a method for burying the gas pipe 1, an excavation method for laying the gas pipe 1 in a groove 2 excavated by an excavator such as a drag shovel called a backhoe is generally used.
In that case, since the gas pipe 1 is laid in the groove 2 in an exposed state, the protective cover 3 can be easily attached to the gas pipe 1. As a protective cover to protect the conventional gas pipe,
For example, the device disclosed in Japanese Utility Model Publication No. 2-28815 is known.
【０００４】図８は、従来技術によるガス管用保護カバ
ーの簡略化された構成を示す斜視図であり、図９は図８
に示すガス管用保護カバーのガス管への装着状況を示す
断面図であり、図９（１）はガス管に装着前の保護カバ
ーの状況を示す断面図であり、図９（２）はガス管に装
着後の保護カバーの状況を示す断面図である。FIG. 8 is a perspective view showing a simplified structure of a conventional gas pipe protective cover, and FIG. 9 is shown in FIG.
FIG. 9 is a cross-sectional view showing a state of mounting the gas pipe protective cover shown in FIG. 9 on the gas pipe, FIG. 9 (1) is a sectional view showing a state of the protective cover before being mounted on the gas pipe, and FIG. It is sectional drawing which shows the state of the protective cover after mounting | wearing a pipe.
【０００５】保護カバー３は、断面が一部切欠かれた略
円形の円筒状部材である。保護カバー３の切欠け両縁部
は、軸線方向に沿って切欠け耳部４を形成しており、そ
の両耳部間は開口部６を形成する。保護カバー３の内周
面には、複数条のリブ５が保護カバー３の軸線方向に沿
って形成されている。このため保護カバー３の剛性は非
常に高くなる。しかしながらその可撓性は極めて乏し
い。保護カバー３の装着は、図９（１）に示すように保
護カバー３の開口部６を矢符７方向に仮想線８まで拡大
し、ガス管１に向けて矢符９方向に強制的に押込むこと
によって行われる。保護カバー３の装着後には図９
（２）に示すようにリブ５はガス管１と保護カバー３と
の間に隙間を形成するので、バックホウなど掘削機との
接触時、その隙間の緩衝作用によってガス管１の損傷や
破損が防止される。The protective cover 3 is a substantially circular cylindrical member whose cross section is partially cut away. The cutout edges of the protective cover 3 form cutout ears 4 along the axial direction, and an opening 6 is formed between the ears. A plurality of ribs 5 are formed on the inner peripheral surface of the protective cover 3 along the axial direction of the protective cover 3. Therefore, the rigidity of the protective cover 3 becomes very high. However, its flexibility is extremely poor. As shown in FIG. 9 (1), the protective cover 3 is attached by enlarging the opening 6 of the protective cover 3 in the direction of the arrow 7 to a virtual line 8 and forcibly in the direction of the arrow 9 toward the gas pipe 1. It is done by pushing. After mounting the protective cover 3, FIG.
As shown in (2), the rib 5 forms a gap between the gas pipe 1 and the protective cover 3. Therefore, when the rib 5 comes into contact with an excavator such as a backhoe, the buffer action of the gap prevents damage or damage to the gas pipe 1. To be prevented.
【０００６】[0006]
【発明が解決しようとする課題】前述のように開削工法
によるガス管の埋設においては、従来技術のガス管用保
護カバー３が好適に使用される。しかしながら近年工事
環境の悪化に伴い非開削工法の採用が多くなってきてい
る。As described above, in burying a gas pipe by the excavation method, the conventional gas pipe protective cover 3 is preferably used. However, in recent years, the non-open cutting method has been increasingly adopted due to the deterioration of the construction environment.
【０００７】図１０は、非開削工法における従来技術の
ガス管用保護カバーの適用状況を示す説明図である。非
開削工法においては、ガス管敷設経路に間隔をあけて第
１掘削穴１１および第２掘削穴１２が掘削される。第１
掘削穴１には推進機１３が設置され、推進機１３はヘッ
ド１４をロッド１５を継ぎ足しながら第２掘削穴１２に
向けて押込み、地中を穿っていく。押込み完了後、ヘッ
ド１４の先端には取付治具１６の一端部が取付けられ、
取付治具１６の他端部には、保護カバー３を装着したガ
ス管１が取付けられる。その後、ヘッド１４は逆方向に
引き戻され、保護カバー３を装着したガス管１は推進機
１３によって穿たれた穴の中へ矢符１７方向に引込まれ
る。第２掘削穴１２の長さは、可撓性の極めて乏しい保
護カバー３をガス管１に装着するために少なくとも保護
カバー３の長さ以上に掘削されているので、第２掘削穴
１２内では保護カバー３を順次ガス管１に装着すること
ができる。このためヘッド１４の引き戻しの完了ととも
に、保護カバー３を装着したガス管１の埋設も完了す
る。FIG. 10 is an explanatory view showing a state of application of a conventional gas pipe protective cover in a non-open cutting method. In the non-excavation method, the first excavation hole 11 and the second excavation hole 12 are excavated at intervals in the gas pipe laying path. First
A propulsion device 13 is installed in the excavation hole 1, and the propulsion device 13 pushes the head 14 toward the second excavation hole 12 while adding the rod 15 to drill into the ground. After the pressing is completed, one end of the mounting jig 16 is mounted on the tip of the head 14.
The gas pipe 1 with the protective cover 3 attached is attached to the other end of the attachment jig 16. After that, the head 14 is pulled back in the opposite direction, and the gas pipe 1 with the protective cover 3 attached is pulled in the direction of arrow 17 into the hole formed by the propulsion device 13. Since the length of the second drill hole 12 is drilled at least longer than the length of the protective cover 3 in order to mount the protective cover 3 having extremely poor flexibility on the gas pipe 1, in the second drill hole 12 The protective cover 3 can be sequentially attached to the gas pipe 1. Therefore, when the pulling back of the head 14 is completed, the embedding of the gas pipe 1 with the protective cover 3 attached is also completed.
【０００８】このように非開削工法によれば、開削工法
に比べ掘削長さは大幅に短縮されるけれども、最近で
は、非開削工法における掘削長さの短縮がさらに要望さ
れている。非開削工法における掘削長さの短縮を行うた
めには、少なくとも保護カバー３の長さ以上必要な第２
掘削穴１２の長さの短縮が課題である。前述のように第
２掘削穴１２の長さは可撓性の極めて乏しい保護カバー
３によって制約されているので、前記課題を解決するた
めには強度と可撓性を合わせ持つ保護カバー３の開発が
要望されている。As described above, according to the non-open cutting method, the excavation length is greatly shortened as compared with the open cutting method, but recently, there has been a demand for further reduction of the excavation length in the non-open cutting method. In order to reduce the excavation length in the non-excavation method, at least the length of the protective cover 3 is required.
The challenge is to reduce the length of the drill hole 12. As described above, the length of the second excavation hole 12 is restricted by the protective cover 3 having extremely poor flexibility. Therefore, in order to solve the above-mentioned problems, the development of the protective cover 3 having both strength and flexibility. Is required.
【０００９】本発明の目的は、非開削工法における掘削
長さの短縮が可能な地中埋設管の保護カバーを提供する
ことにある。An object of the present invention is to provide a protective cover for an underground pipe which can shorten the excavation length in the non-excavation method.
【００１０】[0010]
【課題を解決するための手段】本発明は、地中に埋設さ
れる合成樹脂製管を外囲して保護する断面が一部切欠か
れた略円形のカバーにおいて、切欠かかれた部分に臨む
両端縁から周方向に延びる複数のスリットを、長手方向
に間隔をあけて形成したことを特徴とする地中埋設管の
保護カバーである。DISCLOSURE OF THE INVENTION According to the present invention, in a substantially circular cover having a partially cutaway cross section for surrounding and protecting a synthetic resin pipe buried in the ground, both ends facing the notched part. A protective cover for an underground pipe, characterized in that a plurality of slits extending in the circumferential direction from the edges are formed at intervals in the longitudinal direction.
【００１１】[0011]
【作用】本発明に従えば、合成樹脂製地中埋設管を外囲
して保護する保護カバーは、断面が一部切欠かれた略円
形であり、切欠かれた部分に臨む両端縁から周方向に延
びる複数のスリットが長手方向に間隔をあけて形成され
ている。スリットの形成によって保護カバーの可撓性が
大幅に向上するので、非開削工法において保護カバーの
長さより短い掘削穴中に保護カバーを装着した合成樹脂
製地中埋設管を湾曲させて引込むことが可能となる。こ
のため保護カバーの長さより長い掘削穴が必要である従
来技術に比べて掘削長さを大幅に短縮することができ
る。According to the present invention, the protective cover which surrounds and protects the underground pipe made of synthetic resin has a substantially circular cross section, and has a substantially circular shape in the circumferential direction from both edges facing the notched part. A plurality of slits extending in the longitudinal direction are formed at intervals in the longitudinal direction. Since the flexibility of the protective cover is greatly improved by forming the slit, it is possible to bend the synthetic resin underground pipe with the protective cover bent into the excavation hole shorter than the length of the protective cover in the non-cutting method. It will be possible. For this reason, the excavation length can be significantly reduced as compared with the prior art in which an excavation hole longer than the length of the protective cover is required.
【００１２】[0012]
【実施例】図１は本発明の一実施例である地中埋設管の
保護カバーの簡略化された構成を示す斜視図であり、図
１（１）は無負荷時の状態を示し、図１（２）は湾曲時
の状態を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing a simplified structure of a protective cover for an underground pipe, which is an embodiment of the present invention, and FIG. 1 (1) shows a state under no load. Reference numeral 1 (2) shows a state at the time of bending.
【００１３】地中埋設管の保護カバー２１は、略円筒状
部材であり、その軸直角断面は一部切欠かれた略円形で
ある。保護カバー２１の切欠け部に臨む両端縁部は、そ
の軸線方向に沿って切欠け耳部２４を形成しており、そ
の両耳部間は開口部２５を形成している。保護カバー２
１の内周面には、複数条のリブ２３が保護カバー２１の
軸線方向に沿って形成されている。リブ２３の形成によ
って保護カバー２１の剛性は非常に高くなる。また保護
カバー２１の両切欠け耳部２４から周方向に延びる複数
のスリット２２が長手方向に間隔をあけて形成されてい
る。図１（２）に示すように保護カバー２１に曲げ力が
付与される場合には、スリット２２はスリット幅を拡大
して曲げ変位を吸収することができる。このため保護カ
バー２１は、破損せずに湾曲することが可能となり、保
護カバー２１の可撓性が大幅に向上する。The protective cover 21 for the underground buried pipe is a substantially cylindrical member, and its cross section perpendicular to the axis is a substantially circular shape with a part cut away. Both end edges of the protective cover 21 facing the cutouts form cutout ears 24 along the axial direction, and an opening 25 is formed between the two ears. Protective cover 2
A plurality of ribs 23 are formed on the inner peripheral surface of No. 1 along the axial direction of the protective cover 21. The formation of the ribs 23 makes the protection cover 21 extremely rigid. A plurality of slits 22 extending in the circumferential direction from the notched ears 24 of the protective cover 21 are formed at intervals in the longitudinal direction. When a bending force is applied to the protective cover 21 as shown in FIG. 1 (2), the slit 22 can expand the slit width to absorb the bending displacement. Therefore, the protective cover 21 can be curved without being damaged, and the flexibility of the protective cover 21 is significantly improved.
【００１４】保護カバー２１は、耐衝撃性樹脂製であ
り、原料樹脂を押出成形することにより製造される。ま
たスリット２２は、たとえば鋸加工によって形成され
る。耐衝撃性樹脂としては、たとえば硬質塩化ビニール
樹脂にアクリロニトリルブタジエンゴムなどの衝撃性を
向上させる樹脂をブレンドしたものが好適である。保護
カバー２１の長さは、１本当たり約１ｍであり、通常２
本連結した状態で供給される。The protective cover 21 is made of impact resistant resin and is manufactured by extruding a raw material resin. The slit 22 is formed by sawing, for example. As the impact resistant resin, for example, a hard vinyl chloride resin blended with a resin such as acrylonitrile butadiene rubber that improves impact resistance is suitable. The length of the protective cover 21 is about 1 m per one, and usually 2
Supplied in the fully connected state.
【００１５】図２は、非開削工法における図１に示す保
護カバーの適用状況を示す説明図である。非開削工法に
おいては、地中埋設管たとえば、ガス管２６の敷設経路
に間隔をあけて第１掘削穴３１および第２掘削穴３２が
地面３０に掘削される。第１掘削穴３１には、推進機３
３が設置され、推進機３３はヘッド３４をロッド１５を
継ぎ足しながら油圧力によって第２掘削穴３２に向けて
押込み、地中を穿ってゆく。油圧力は、油圧ユニット３
６から油圧ホース３７を介して推進機３３に供給され
る。押込み完了後、ヘッド３４の先端には取付治具３８
の一端部が取付けられ、取付治具３８の他端部には保護
カバー２１を装着したガス管２６が取付けられる。保護
カバー２１のガス管２６への装着は、保護カバー２１の
前記開口部２５を拡大して前記図９に示すような方法で
行われる。FIG. 2 is an explanatory view showing the application situation of the protective cover shown in FIG. 1 in the non-cutting method. In the non-excavation method, the first excavation hole 31 and the second excavation hole 32 are excavated in the ground 30 at intervals in the laying route of the underground pipe, for example, the gas pipe 26. In the first drill hole 31, the propulsion device 3
3, the propulsion device 33 pushes the head 34 toward the second excavation hole 32 by hydraulic pressure while adding the head 15 to the rod 15 and pierces the ground. Hydraulic pressure is the hydraulic unit 3
6 is supplied to the propulsion unit 33 via the hydraulic hose 37. After the pushing is completed, the mounting jig 38 is attached to the tip of the head 34.
Is attached to the other end of the attachment jig 38, and the gas pipe 26 to which the protective cover 21 is attached is attached to the other end of the attachment jig 38. The protection cover 21 is attached to the gas pipe 26 by a method as shown in FIG. 9 in which the opening 25 of the protection cover 21 is enlarged.
【００１６】ガス管２６は、合成樹脂製たとえばポリエ
チレン製であり、可撓性を有している。このためガス管
２６は、図示を省略する巻取リールにコイル状に巻取ら
れて工事現場に搬入され、巻取リールから巻戻しながら
供給される。取付治具３８の取付完了後、ヘッド３４は
矢符３９方向に引き戻され、それとともに保護カバー２
１を装着したガス管２６は、湾曲しながら第２掘削穴３
２内に引込まれ、さらに推進機３３によって穿たれた穴
の中へ矢符３９方向に引込まれる。このためヘッド３４
の引戻し完了とともに、保護カバー２１を装着したガス
管２６の地中埋設も完了する。The gas pipe 26 is made of synthetic resin such as polyethylene and has flexibility. Therefore, the gas pipe 26 is wound in a coil shape on a take-up reel (not shown), carried into a construction site, and supplied while being unwound from the take-up reel. After the attachment of the attachment jig 38 is completed, the head 34 is pulled back in the direction of the arrow 39, and the protective cover 2
The gas pipe 26 equipped with 1 is curved while bending the second drill hole 3
2 and further into the hole made by the propulsion device 33 in the direction of arrow 39. Therefore, the head 34
With the completion of pulling back, the burying of the gas pipe 26 equipped with the protective cover 21 in the ground is completed.
【００１７】前述のように保護カバー２１およびガス管
２６は可撓性を有しているので、保護カバー２１を装着
したガス管２６は、第２掘削穴３２の長さが保護カバー
２１の長さより短くても第２掘削穴３２内へ破損するこ
となく引込まれる。このため非開削工法において少なく
とも保護カバー２１の長さよりも長い掘削穴を必要とす
る従来技術よりも掘削穴の長さを大幅に短縮することが
できる。また保護カバー２１の１本当たりの長さを長く
して、保護カバーの接続回数を低減することができるの
で、接続の手間を省くことが可能となり、ガス管２６の
地中埋設作業の能率が大幅に向上する。なお、前記保護
カバー２１とガス管２６とを同時に引込む方法の他に、
保護カバー２１のみ先行して引込み、引込まれた保護カ
バー２１内にガス管２６を挿入する方法を採用してもよ
い。As described above, since the protective cover 21 and the gas pipe 26 are flexible, the length of the second excavation hole 32 of the gas pipe 26 with the protective cover 21 attached is longer than that of the protective cover 21. Even if it is shorter than this, it is drawn into the second drill hole 32 without damage. Therefore, in the non-excavation method, the length of the excavation hole can be significantly reduced as compared with the conventional technique that requires the excavation hole longer than at least the length of the protective cover 21. Further, since the length of each protective cover 21 can be increased to reduce the number of times the protective covers are connected, it is possible to save the labor of the connection and to efficiently bury the gas pipe 26 in the ground. Greatly improved. In addition to the method of simultaneously pulling in the protective cover 21 and the gas pipe 26,
A method may be adopted in which only the protective cover 21 is retracted in advance and the gas pipe 26 is inserted into the retracted protective cover 21.
【００１８】図３は、図１に示す保護カバーを適用した
非開削工法によるガス管の地中埋設工事の施工例を示す
説明図である。図３には、ガス本管４１から住宅のガス
メータ４２まで車道４３を横断してガス管２６を地中埋
設する工事の施工例を示している。施工に際しては、第
１掘削穴３１が幅の広い歩道４４側に掘削され、第２掘
削穴３２が幅の狭い歩道４５側に掘削される。保護カバ
ー２１を装着したガス管２６は、図２に示す非開削工法
によって第２掘削穴３２から引込まれ、排水溝４６およ
び車道４３の地下を通って第１掘削穴３１に到達する。
その後ガス管２６は、ガス本管４１およびガスメータ４
２に接続され、地中埋設工事が完了する。このように車
道を横断し、かつ一方の歩道の幅が狭い場合には、本実
施例の保護カバー２１は非開削工法によるガス管２６の
地中埋設工事に好適に適用することができる。なお非開
削工法を好適に施工できる長さは、２ｍ〜７ｍ程度であ
る。FIG. 3 is an explanatory view showing a construction example of underground burying work of a gas pipe by a non-open cutting method to which the protective cover shown in FIG. 1 is applied. FIG. 3 shows a construction example of the construction in which the gas pipe 26 is buried in the ground across the road 43 from the gas main pipe 41 to the gas meter 42 of the house. At the time of construction, the first excavation hole 31 is excavated on the side of the wide sidewalk 44, and the second excavation hole 32 is excavated on the side of the narrow sidewalk 45. The gas pipe 26 with the protective cover 21 attached thereto is drawn in from the second excavation hole 32 by the non-excavation method shown in FIG. 2, and reaches the first excavation hole 31 through the drainage groove 46 and the underground of the road 43.
After that, the gas pipe 26 is connected to the gas main pipe 41 and the gas meter 4.
It is connected to No. 2 and the underground burial work is completed. When the width of one of the sidewalks is crossed across the road as described above, the protective cover 21 of the present embodiment can be suitably applied to the underground burying work of the gas pipe 26 by the non-open cutting method. The length for which the non-excavation method can be suitably applied is about 2 m to 7 m.
【００１９】図４は図１に示す保護カバーを装着して地
下に埋設されているガス管が工事中掘削機と接触した状
況を示す説明図であり、図４（１）はその状況を示す正
面図であり、図４（２）はその状況を示す側面図であ
る。地下に埋設されているガス管２６の近辺では、様々
な工事のために掘削機による掘削が行われることがあ
る。たとえば、溝の掘削など機械位置より低い場所の掘
削には、バックホウ４８と呼ばれるドラグショベルが使
用される。バックホウ４８が誤って図１に示す保護カバ
ー２１を装着したガス管２６に接触した場合には、図４
（２）に示すように保護カバー２１の内周面に形成され
ているリブ２３が保護カバー２１とガス管２６との間に
隙間４９を形成するので、隙間４９の緩衝作用によって
衝撃を緩和することができる。また保護カバー２１は、
前述のとおり耐衝撃性の優れた硬質塩化ビニール樹脂に
よって製造されており、かつリブ２３によって剛性が非
常に高くなっているので、スリット２２の形成による強
度低下を充分補うことが可能である。このため保護カバ
ー２１は、バックホウ４８との接触時にガス管２６の損
傷や破損を防止することができる。FIG. 4 is an explanatory view showing a situation in which the gas pipe buried underground with the protective cover shown in FIG. 1 comes into contact with the excavator during construction, and FIG. 4 (1) shows the situation. It is a front view, and FIG. 4 (2) is a side view showing the situation. In the vicinity of the gas pipe 26 buried underground, excavation may be performed by an excavator for various works. For example, a drag shovel called a backhoe 48 is used for excavation at a place lower than the machine position such as excavation of a ditch. If the backhoe 48 accidentally contacts the gas pipe 26 with the protective cover 21 shown in FIG.
As shown in (2), the ribs 23 formed on the inner peripheral surface of the protective cover 21 form a gap 49 between the protective cover 21 and the gas pipe 26, so the shock absorbing action is mitigated by the buffering action of the gap 49. be able to. The protective cover 21 is
As described above, since it is made of a hard vinyl chloride resin having excellent impact resistance, and the rib 23 has a very high rigidity, it is possible to sufficiently compensate for the strength reduction due to the formation of the slit 22. Therefore, the protective cover 21 can prevent the gas pipe 26 from being damaged or broken when it comes into contact with the backhoe 48.
【００２０】図５は図１に示す保護カバーの具体的構成
を示す説明図であり、図５（１）は保護カバーの正面図
であり、図５（２）は保護カバーの側面図である。保護
カバー２１の寸法は、ガス管２６の大きさによって適宜
変更される。ガス管２６の外径が、たとえば４２ｍｍで
ある場合、保護カバー２１の寸法は、たとえば長さＬは
９００ｍｍであり、外径Ｄは６８ｍｍであり、厚みｔは
２〜３ｍｍである。スリット２２は、保護カバー２１の
軸線方向に等間隔で形成されている。スリット２２のピ
ッチは、たとえば１５０ｍｍであり、スリット２２の深
さは、保護カバー２１の円周長さの１／４程度が好まし
い。リブ２３は、保護カバー２１の内周面に等間隔にな
るように、たとえば６個設けられている。リブ２３の高
さは、保護カバー２１の厚さとほぼ等しく２〜３ｍｍで
あり、幅は高さより大きくすることが好ましい。また開
口部２５の幅Ｌは、ガス管２６の外径よりも狭く、その
外径の１／２より広くすることが好ましい。これによっ
て保護カバー２１はガス管２６に装着しやすくなり、ガ
ス管２６の外周を充分に保護することができる。FIG. 5 is an explanatory view showing a specific structure of the protective cover shown in FIG. 1, FIG. 5 (1) is a front view of the protective cover, and FIG. 5 (2) is a side view of the protective cover. . The size of the protective cover 21 is appropriately changed depending on the size of the gas pipe 26. When the outer diameter of the gas pipe 26 is, for example, 42 mm, the protective cover 21 has, for example, a length L of 900 mm, an outer diameter D of 68 mm, and a thickness t of 2 to 3 mm. The slits 22 are formed at equal intervals in the axial direction of the protective cover 21. The pitch of the slits 22 is, for example, 150 mm, and the depth of the slits 22 is preferably about 1/4 of the circumferential length of the protective cover 21. For example, six ribs 23 are provided on the inner peripheral surface of the protective cover 21 at equal intervals. The height of the rib 23 is approximately equal to the thickness of the protective cover 21 and is 2 to 3 mm, and the width is preferably larger than the height. The width L of the opening 25 is preferably narrower than the outer diameter of the gas pipe 26 and wider than 1/2 of the outer diameter thereof. As a result, the protective cover 21 can be easily attached to the gas pipe 26, and the outer periphery of the gas pipe 26 can be sufficiently protected.
【００２１】図６は図１に示す保護カバーに設けられた
スリットの形状を示す模式図であり、図６（１）はＴ字
型スリットを示す模式図であり、図６（２）は鍵穴型ス
リットを示す模式図である。保護カバー２１に設けられ
ているスリット２２は、保護カバー２１の切欠け耳部２
４から周方向に延び終端で幅が増大している。スリット
２２の終端で幅を増大するのは、この部分における応力
集中を緩和して、スリット２２を起点とする保護カバー
２１の損傷や破損を防止するためである。スリット２２
の形状は、Ｔ字型５１および鍵穴型５２のいずれでもよ
く、同一の破損防止効果を得ることができる。FIG. 6 is a schematic view showing the shape of the slit provided in the protective cover shown in FIG. 1, FIG. 6 (1) is a schematic view showing a T-shaped slit, and FIG. 6 (2) is a keyhole. It is a schematic diagram which shows a mold slit. The slit 22 provided in the protective cover 21 is provided with the cutout ear portion 2 of the protective cover 21.
4 extends in the circumferential direction and increases in width at the end. The reason why the width is increased at the end of the slit 22 is to alleviate stress concentration in this portion and prevent damage or breakage of the protective cover 21 starting from the slit 22. Slit 22
The shape may be any of the T-shaped shape 51 and the keyhole shape 52, and the same damage prevention effect can be obtained.
【００２２】[0022]
【発明の効果】以上のように本発明によれば、断面が一
部切欠かれた略円形である保護カバーには、切欠け部か
ら周方向に延びる複数のスリットが長手方向に形成され
ているので、保護カバーの可撓性が大幅に向上する。こ
れによって非開削工法において保護カバーの長さより短
い掘削穴中に保護カバーを装着した合成樹脂製地中埋設
管を湾曲させて引込むことができるので、保護カバーの
長さより長い掘削穴が必要である従来技術に比べて掘削
長さの大幅な短縮が可能となる。また保護カバー１本当
たりの長さを長くして保護カバーの接続回数を低減する
ことができるので、接続の手間を省くことが可能とな
り、地中埋設管の埋設作業の能率が大幅に向上する。As described above, according to the present invention, a plurality of slits extending in the circumferential direction from the cutouts are formed in the longitudinal direction in the protective cover having a substantially circular cross section. Therefore, the flexibility of the protective cover is significantly improved. This allows the underground buried pipe made of synthetic resin with the protective cover to be curved and drawn into the excavation hole shorter than the length of the protective cover in the non-excavation method, so an excavation hole longer than the length of the protective cover is required. The excavation length can be greatly shortened as compared with the conventional technology. Further, since the length of each protective cover can be increased to reduce the number of times the protective cover is connected, it is possible to save the labor of the connection and to greatly improve the efficiency of the burying work of the underground burial pipe. .
【図１】本発明の一実施例である地中埋設管の保護カバ
ーの簡略化された構成を示す斜視図である。FIG. 1 is a perspective view showing a simplified structure of a protective cover for an underground pipe, which is an embodiment of the present invention.
【図２】非開削工法における図１に示す保護カバーの適
用状況を示す説明図である。FIG. 2 is an explanatory view showing an application situation of the protective cover shown in FIG. 1 in a non-open cutting method.
【図３】図１に示す保護カバーを適用した非開削工法に
よるガス管の地中埋設工事の施工例を示す説明図であ
る。FIG. 3 is an explanatory diagram showing a construction example of underground burying work of a gas pipe by a non-open cutting method to which the protective cover shown in FIG.
【図４】図１に示す保護カバーを装着して地中に埋設さ
れているガス管が工事中掘削機と接触した状況を示す説
明図である。FIG. 4 is an explanatory diagram showing a situation in which the gas pipe buried in the ground with the protective cover shown in FIG. 1 contacting the excavator during construction.
【図５】図１に示す保護カバーの具体的構成を示す説明
図である。5 is an explanatory diagram showing a specific configuration of the protective cover shown in FIG.
【図６】図１に示す保護カバーに設けられたスリットの
形状を示す模式図である。FIG. 6 is a schematic view showing the shape of slits provided in the protective cover shown in FIG.
【図７】開削工法における従来技術のガス管用保護カバ
ーの装着状況を簡略化して示す斜視図である。FIG. 7 is a perspective view showing a simplified state of mounting a protective cover for a gas pipe according to a conventional technique in an excavation method.
【図８】従来技術によるガス管用保護カバーの簡略化さ
れた構成を示す斜視図である。FIG. 8 is a perspective view showing a simplified structure of a conventional protective cover for a gas pipe.
【図９】図８に示すガス管用保護カバーのガス管への装
着状況を示す断面図である。FIG. 9 is a cross-sectional view showing how the gas pipe protective cover shown in FIG. 8 is attached to a gas pipe.
【図１０】非開削工法における従来技術のガス管用保護
カバーの適用状況を示す説明図である。FIG. 10 is an explanatory view showing a state of application of a conventional gas pipe protective cover in a non-cutting method.
１，２６ ガス管 ３，２１ 保護カバー ４，２４ 切欠け耳部 ５，２３ リブ ６，２５ 開口部 １１，３１ 第１掘削穴 １２，３２ 第２掘削穴 １３，３３ 推進機 １４，３４ ヘッド １５，３５ ロッド １６，３８ 取付治具 ２２ スリット 1,26 Gas pipe 3,21 Protective cover 4,24 Notched ear 5,23 Rib 6,25 Opening 11,31 First drilling hole 12,32 Second drilling hole 13,33 Propulsion machine 14,34 Head 15 , 35 Rod 16, 38 Mounting jig 22 Slit
Claims (1)
て保護する断面が一部切欠かれた略円形のカバーにおい
て、 切欠かれた部分に臨む両端縁から周方向に延びる複数の
スリットを、長手方向に間隔をあけて形成したことを特
徴とする地中埋設管の保護カバー。1. A substantially circular cover with a partially cut-away cross section that surrounds and protects a synthetic resin pipe buried in the ground, and has a plurality of circumferentially extending end edges facing the notched portion. A protective cover for an underground pipe, characterized in that slits are formed at intervals in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6291782A JPH08145278A (en) | 1994-11-25 | 1994-11-25 | Protection cover for underground pipe or tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6291782A JPH08145278A (en) | 1994-11-25 | 1994-11-25 | Protection cover for underground pipe or tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08145278A true JPH08145278A (en) | 1996-06-07 |
Family
ID=17773360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6291782A Pending JPH08145278A (en) | 1994-11-25 | 1994-11-25 | Protection cover for underground pipe or tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08145278A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327890A (en) * | 2001-04-27 | 2002-11-15 | Sekisui Chem Co Ltd | Pipe protective cover and protection execution method for resin pipe |
| JP2011033052A (en) * | 2009-07-29 | 2011-02-17 | Keiyo Gas Kk | Spacer jig and method of cutting existing pipe using the same |
| ES2385242A1 (en) * | 2010-01-05 | 2012-07-20 | Rema Tip Top Ibérica, S.A. | Procedure and piece for the protection of conductive pipes of fluids. (Machine-translation by Google Translate, not legally binding) |
| JP2016070356A (en) * | 2014-09-30 | 2016-05-09 | 日本ピラー工業株式会社 | cover |
| KR20200002020U (en) * | 2019-03-07 | 2020-09-16 | 하우드 주식회사 | supporter for fold prevention of a hose for faucet |
-
1994
- 1994-11-25 JP JP6291782A patent/JPH08145278A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327890A (en) * | 2001-04-27 | 2002-11-15 | Sekisui Chem Co Ltd | Pipe protective cover and protection execution method for resin pipe |
| JP2011033052A (en) * | 2009-07-29 | 2011-02-17 | Keiyo Gas Kk | Spacer jig and method of cutting existing pipe using the same |
| ES2385242A1 (en) * | 2010-01-05 | 2012-07-20 | Rema Tip Top Ibérica, S.A. | Procedure and piece for the protection of conductive pipes of fluids. (Machine-translation by Google Translate, not legally binding) |
| JP2016070356A (en) * | 2014-09-30 | 2016-05-09 | 日本ピラー工業株式会社 | cover |
| KR20200002020U (en) * | 2019-03-07 | 2020-09-16 | 하우드 주식회사 | supporter for fold prevention of a hose for faucet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4668874B2 (en) | Steel pipe tip receiving method | |
| JP3304051B2 (en) | Pipe updating equipment | |
| JPH08145278A (en) | Protection cover for underground pipe or tube | |
| KR101506163B1 (en) | the improved cast injected concrete pile structure using automatic expanded rebar and quick-gelled injection and the reinforced steel withdrawal method using the same | |
| JP3019207B2 (en) | Excavation equipment for shield machine | |
| JP3341207B2 (en) | Protective material for underground piping | |
| KR20020082414A (en) | Tube for protecting cables, method of laying the tube and mehtod of pulling the tube | |
| JP6220602B2 (en) | Ground anchor and ground anchor method | |
| JP3533463B2 (en) | Reinforcement method of connection part in existing pipe | |
| JPH05106779A (en) | Protective cover structure for buried pipe | |
| JP6578256B2 (en) | Repair method of cable for direct burial | |
| JPH08338016A (en) | Method for freezing-expansion countermeasure construction | |
| JP4782460B2 (en) | Water pipe | |
| JPH07189588A (en) | Double structural steel pipe for propulsive excavating method | |
| JP7432433B2 (en) | Buried object protection equipment and installation structure | |
| JP2584817Y2 (en) | Tail seal device for shield machine | |
| JP5470110B2 (en) | Branch fitting | |
| JP3666815B2 (en) | Existing pipe cutting tool and existing pipe drawing tool | |
| JP4172426B2 (en) | Anchor device and installation method | |
| JP4270328B1 (en) | Shield machine | |
| JP5534879B2 (en) | Mounting structure of bell mouth, fixing structure of bell mouth and underground box, and mounting method of bell mouth to underground box | |
| JPH11287359A (en) | Branch pipe connecting method to buried pipe and water stopping device for branch pipe connection | |
| JP3517516B2 (en) | Pipe laying method | |
| JPH0633691A (en) | Direct pushshield drilling method | |
| JP2861566B2 (en) | Shield excavator and tunnel excavation method |