JPH0412147Y2 - - Google Patents
Info
- Publication number
- JPH0412147Y2 JPH0412147Y2 JP1986122545U JP12254586U JPH0412147Y2 JP H0412147 Y2 JPH0412147 Y2 JP H0412147Y2 JP 1986122545 U JP1986122545 U JP 1986122545U JP 12254586 U JP12254586 U JP 12254586U JP H0412147 Y2 JPH0412147 Y2 JP H0412147Y2
- Authority
- JP
- Japan
- Prior art keywords
- packing
- impermeable membrane
- wellhead
- shield excavator
- packings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000012856 packing Methods 0.000 claims description 57
- 239000012528 membrane Substances 0.000 claims description 37
- 230000002093 peripheral effect Effects 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 6
- 239000003673 groundwater Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は立坑のシールド掘削機発進坑口に装着
する坑口パツキンに関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a wellhead gasket that is attached to the shaft opening of a shield excavator.
（従来技術とその問題点）
近年、下水道管の敷設において、地盤を開削す
ることなくシールド工法や推進工法により管路を
築造することが行われている。(Prior art and its problems) In recent years, in laying sewer pipes, the shield method or the propulsion method is used to construct sewer pipes without excavating the ground.
シールド工法は掘削機によつて地盤を掘削し、
掘削機の後方部においてセグメントを管状に組立
てる作業を順次行いながら管路を形成するもので
あり、推進後方は掘削機に後続してヒユーム管を
接続し、立坑内に配設した推進ジヤツキによつて
ヒユーム管の後端を押圧しながら掘削機により土
砂を掘削してヒユーム管を地盤中に圧入すること
により管路を形成するものである。 The shield method excavates the ground using an excavator,
The pipeline is formed by sequentially assembling the segments into a tubular shape at the rear of the excavator, and at the rear of the excavator, a humuum pipe is connected to the excavator and a propulsion jack installed in the shaft is used to form the pipeline. A conduit is formed by pressing the rear end of the hume pipe, excavating earth and sand with an excavator, and press-fitting the hume pipe into the ground.
しかしながら、このようにして形成された管路
は、一定寸法のセグメント或いはヒユーム管を順
次接合してなるものであるから、地下水の多い地
盤の場合では管路供用時にその接合部から地下水
が管路内に浸入し、管路内には流通する実際の下
水流量よりも多く流れることになつて下水処理場
における処理量が２〜３割も増大するという問題
点がある。 However, since the pipes formed in this way are made by sequentially joining segments of a certain size or humid pipes, in the case of ground with a lot of groundwater, groundwater may flow from the joints into the pipe when the pipe is in service. There is a problem in that the amount of sewage that is processed in the sewage treatment plant increases by 20 to 30% because the amount of sewage that flows through the pipes is greater than the actual amount of sewage flowing through the pipes.
このため、筒状の不透水膜を長さ方向に収縮さ
せた状態でシールド掘削機内に配設し、シールド
掘削機が推進するに従つてシールド掘削機後端か
ら不透水膜を繰り出し、管体外周を被覆すること
が行われるようになつた。 For this purpose, a cylindrical impermeable membrane is contracted in the length direction and placed inside the shield excavator, and as the shield excavator advances, the impermeable membrane is paid out from the rear end of the shield excavator, and the membrane is removed from the pipe body. Covering the surrounding area began to be practiced.
その場合、発進立坑からのシールド掘削機の発
進時において、立坑壁の発進口に止水パツキンを
設けてその止水パツキンをシールド掘削機外周面
や下水道管の外周面に密着させて地下水が立坑内
に浸入するのを防止している。 In that case, when the shield excavator starts from the starting shaft, a water-stop gasket is provided at the starting port of the shaft wall, and the water-stop gasket is brought into close contact with the outer circumferential surface of the shield excavator and the outer circumferential surface of the sewer pipe, so that groundwater flows into the shaft. This prevents water from entering the interior.
しかしながら、上述のように管体を筒状シート
等の不透水膜で被覆する時に、その筒状不透水膜
の一端を立坑内に固定する必要があるが、この場
合、止水パツキンと管体との間に不透水膜が位置
し、該不透水膜は管体が前進するときにこの管体
の外周面に摺接して摩耗破損するという問題点が
ある。 However, when covering the pipe with an impermeable membrane such as a cylindrical sheet as described above, it is necessary to fix one end of the cylindrical impermeable membrane inside the shaft. There is a problem that an impermeable membrane is located between the tube and the tube, and the impermeable membrane comes into sliding contact with the outer circumferential surface of the tube when the tube moves forward, causing wear and tear.
又、セグメント或いはヒユーム管は、シールド
掘削機の外径よりも小径であつてシールド掘削機
の後端に嵌合、後続させるものであるから、その
接続部の外周に段差が生じ、発進立坑に配設した
坑口パツキンは、この段差に対応して止水できる
ものでなくてはならない。このため、従来から坑
口の周面にチユーブ状のパツキンを装着し、該チ
ユーブ状パツキン内に流体を注入することにより
チユーブ状パツキンを膨張させてシールド掘削機
やセグメント或いはヒユーム管の外周部に圧接さ
せるようにしているが、構造が複雑で高価につく
という問題点があつた。 In addition, since the segment or hump pipe has a smaller diameter than the outside diameter of the shield excavator and is fitted to the rear end of the shield excavator and is connected to the rear end of the shield excavator, a step is created on the outer periphery of the connection part, causing a problem in the starting shaft. The wellhead gasket installed must be able to accommodate this difference in level and be able to stop water. For this reason, a tube-shaped packing has traditionally been attached to the circumferential surface of the wellhead, and by injecting fluid into the tube-shaped packing, the tube-shaped packing is expanded and pressed against the outer periphery of a shield excavator, segment, or humid pipe. However, the problem was that the structure was complicated and expensive.
本考案はこのような問題点を解消した坑口パツ
キンの提供を目的とするものである。 The purpose of the present invention is to provide a wellhead packing that solves these problems.
（問題点を解決するための手段）
上記目的を達成するために、本考案の坑口パツ
キンは、実施例に対応する図面に示すように、坑
口４の周辺部に、内周部が坑口４に向かつて突出
した前後一対のパツキン５，６を固定すると共に
これらの前後パツキン５，６間に不透水膜１６の
端部を挟設して固定し、坑口から推進する管体の
外周面に接して前方に屈曲した後部パツキン６の
外周部上に不透水膜１６を介して前部パツキン５
の屈曲内周部を重合させるように構成したことを
特徴とするものである。(Means for Solving the Problems) In order to achieve the above object, the wellhead packing of the present invention is designed such that the inner peripheral part is attached to the periphery of the wellhead 4, and the inner peripheral part is attached to the wellhead 4, as shown in the drawing corresponding to the embodiment. A pair of front and rear packings 5, 6 that protrude toward the front are fixed, and the ends of the impermeable membrane 16 are sandwiched and fixed between these front and rear packings 5, 6, and are in contact with the outer circumferential surface of the pipe body propelled from the mine entrance. The front gasket 5 is placed on the outer periphery of the rear gasket 6 bent forward with the impermeable membrane 16 interposed therebetween.
The invention is characterized in that the bent inner circumferential portion of the bending member is polymerized.
（作用）
シールド掘削機ａが坑口４を通過する直前にお
いては前部パツキン５はシールド掘削機ａの後端
外周面に圧接しており、後部パツキン６はシール
ド掘削機ａに後続するセグメント或いはヒユーム
管の外周面に圧接した状態となる。(Function) Immediately before the shield excavator a passes the tunnel entrance 4, the front packing 5 is in pressure contact with the outer peripheral surface of the rear end of the shield excavator a, and the rear packing 6 is attached to the segment or humidus that follows the shield excavator a. It comes into pressure contact with the outer peripheral surface of the pipe.
シールド掘削機ａが坑口４を通過した時には、
セグメント或いはヒユーム管の外周面に前後パツ
キン５，６の内端部が互いに重合した状態で圧接
する。 When shield excavator a passes through the wellhead 4,
The inner ends of the front and rear packings 5, 6 are pressed against the outer circumferential surface of the segment or the fume tube in a state where they are overlapped with each other.
この際、シールド掘削機ａの後部内に格納した
筒状不透水膜の端部を前記両パツキン５，６の取
付部に一体に固定しているので、該筒状不透水膜
が両パツキン５，６の重合部で挟圧された状態と
なつてセグメント或いはヒユーム管の外周面に摺
接することがない。 At this time, since the ends of the cylindrical impermeable membrane stored in the rear part of the shield excavator a are integrally fixed to the mounting parts of the two packings 5 and 6, the cylindrical impermeable membrane , 6, and will not come into sliding contact with the outer circumferential surface of the segment or hume tube.
さらに、両パツキン５，６間の空間部に泥水を
供給して筒状不透水膜とセグメント或いはヒユー
ム管との間に充填することにより、筒状不透水膜
がセグメント或いはヒユーム管に摺接するのを防
止することができる。 Furthermore, by supplying muddy water to the space between the two packings 5 and 6 and filling it between the cylindrical impermeable membrane and the segment or hume pipe, the cylindrical impermeable membrane can slide into contact with the segment or hume pipe. can be prevented.
（実施例）
本考案の実施例を図面について説明すると、１
は発進立坑、２は立坑壁、３は地盤で、立坑壁２
には発進坑口４が開設されてある。(Example) To explain the example of the present invention with reference to the drawings, 1
is the starting shaft, 2 is the shaft wall, 3 is the ground, and shaft wall 2
Launch pit 4 has been opened.
５，６は坑口４の開口後面に前後方向に適宜間
隔を存して配設した円形環状の弾性板よりなる前
後パツキンで、坑口４の開口部後面側に周方向に
適宜間隔毎に袋ナツト７を埋設し、これらの袋ナ
ツト７に螺子棒８の一端部を螺合させて該螺子棒
８に前部パツキン５の外周部複数個所に穿設した
取付孔を挿通すると共に内径が坑口４の内径に略
等しいリング状押さえ板１０と、同じく内径が坑
口４の内径に略等しい断面上向きコ字状のリング
部材１１とを坑口４に合わせて順次該螺子棒８に
取付けてあり、さらに、リング部材１１の後面に
後部パツキン６を当接させて該後部パツキン６の
外周部複数個所に穿設した取付孔１２を螺子棒８
に挿通し、螺子棒８の他端部にリング状押さえ板
９を介してナツト２４を螺締することにより両パ
ツキン５，６及びリング部材１１を固着している
ものである。 Reference numerals 5 and 6 denote front and rear packings made of circular annular elastic plates arranged at appropriate intervals in the longitudinal direction on the rear surface of the opening of the mine entrance 4, and cap nuts are installed at appropriate intervals in the circumferential direction on the rear surface of the opening of the mine entrance 4. 7 is buried, one end of a screw rod 8 is screwed into these cap nuts 7, and the screw rod 8 is inserted through the mounting holes drilled at multiple locations on the outer periphery of the front packing 5, and the inner diameter is the same as that of the tunnel entrance 4. A ring-shaped holding plate 10 whose inner diameter is substantially equal to the inner diameter of the wellhead 4, and a ring member 11 whose cross section is upwardly U-shaped and whose inner diameter is substantially equal to the inner diameter of the wellhead 4 are sequentially attached to the threaded rod 8 in alignment with the wellhead 4, and further, The rear packing 6 is brought into contact with the rear surface of the ring member 11, and the mounting holes 12 bored at multiple locations on the outer periphery of the rear packing 6 are inserted into the screw rod 8.
The two packings 5, 6 and the ring member 11 are fixed by inserting the nut 24 into the other end of the threaded rod 8 through a ring-shaped holding plate 9.
坑口４の方向に突出する前後パツキン５，６の
内周部の突出長は、前部パツキン５よりも後部パ
ツキン６を長く形成して、内周部がセグメント或
いはヒユーム管（以下、管体とする）ｂの外周面
に断面舌片状に屈曲した状態で接した時に、後部
パツキン６の内周部上に前部パツキン５の内周部
が重合した状態となるようにしてある。 The protruding length of the inner circumferential parts of the front and rear packings 5 and 6 that protrude in the direction of the mine entrance 4 is such that the rear packing 6 is longer than the front packing 5, so that the inner peripheral parts are segmented or humid pipes (hereinafter referred to as pipe bodies). (b) When the front packing 5 comes into contact with the outer circumferential surface of the front packing 5 in a bent state having a tongue-shaped cross section, the inner circumferential part of the front packing 5 overlaps with the inner circumferential part of the rear packing 6.
１３は坑口４を通過直前のシールド掘削機ａの
後端に管体ｂを接続させる際に、リング部材１１
と後部パツキン６間に介在させておくスペーサリ
ングである。 Reference numeral 13 denotes a ring member 11 that is used when connecting the pipe body b to the rear end of the shield excavator a just before passing through the tunnel entrance 4.
This is a spacer ring interposed between the rear gasket 6 and the rear gasket 6.
１４はリング部材１１の適所にその開口端を該
リング部材１１の内周側に連通させて取付けた注
入パイプで、バルブ１５を設けてある。 Reference numeral 14 denotes an injection pipe which is attached to a suitable position of the ring member 11 so that its open end communicates with the inner peripheral side of the ring member 11, and a valve 15 is provided therein.
シールド掘削機ａは、そのスキンプレート後部
にビニールシート等よりなる長尺の筒状不透水膜
１６を長さ方向に収縮させて格納した格納室１７
を設けてあり、該格納室１７の後端を後方に開口
させて不透水膜１６の出口１８に形成してある。
この不透水膜１６の端部は格納室１７の出口１８
から引き出されて前記前後一対のパツキン５，６
間に挟設状態に介在し、前記リング状押さえ板１
０とリング部材１１間に固定させてある。 The shield excavator a has a storage chamber 17 in which a long cylindrical impermeable membrane 16 made of a vinyl sheet or the like is contracted in the length direction and stored at the rear of the skin plate.
The rear end of the storage chamber 17 is opened rearward to form an outlet 18 of the impermeable membrane 16.
The end of this water-impermeable membrane 16 is connected to the outlet 18 of the storage chamber 17.
The pair of front and rear gaskets 5 and 6 are pulled out from the
The ring-shaped pressing plate 1 is interposed in between.
0 and the ring member 11.
以上のように構成した坑口パツキンの使用例を
述べると、まず、第２図に示すように、立坑１の
シールド掘削機発進予定位置の壁２に開設した坑
口４の開口後面に前部パツキン５のみを装着した
のち、スキンプレートの後部内周に不透水膜１６
を格納したシールド掘削機ａを坑口４に挿入し、
前部パツキン５の内周部を断面舌片形状に屈曲さ
せながら、シールド掘削機ａの外周面に圧接させ
ることにより立坑内への地下水の流入を防止す
る。 To describe an example of the use of the wellhead gasket configured as described above, first, as shown in Fig. 2, a front gasket 5 is attached to the rear surface of the opening of the mineshaft 4 opened on the wall 2 of the shaft 1 where the shield excavator is scheduled to start. After installing the chisel, an impermeable membrane 16 is attached to the rear inner circumference of the skin plate.
Insert the shield excavator a containing the
The inner peripheral part of the front packing 5 is bent into a tongue-shaped cross section and pressed against the outer peripheral surface of the shield excavator a, thereby preventing groundwater from flowing into the shaft.
この状態でシールド掘削機ａを前進させ、該シ
ールド掘削機ａの後端が前部パツキン５の近傍に
達したときにその掘進を一次中止する。この時、
シールド掘削機ａの後端部の格納室１７からの不
透水膜１６の端部が少し出ている状態になつてお
あり、この不透水膜１６を引き出して立坑壁２の
袋ナツト７に螺合させている螺子棒８にその端部
に複数個所を挿通したのち、第３図に示すよう
に、リング部材１１とスペーサリング１３、後部
パツキン６、押さえ板９を順次、螺子棒８に取付
け、ナツト２４を螺締して不透水膜１６の端部を
挟着すると共にスペーサリング１３と後部パツキ
ン６を固定する。 In this state, the shield excavator a is advanced, and when the rear end of the shield excavator a reaches the vicinity of the front packing 5, the excavation is temporarily stopped. At this time,
The end of the impermeable membrane 16 from the storage chamber 17 at the rear end of the shield excavator a is slightly protruding, and the impermeable membrane 16 is pulled out and screwed into the cap nut 7 of the shaft wall 2. After inserting the threaded rod 8 into the threaded rod 8 at a plurality of places at its end, as shown in FIG. , screw the nut 24 to sandwich the end of the water-impermeable membrane 16 and fix the spacer ring 13 and rear packing 6.
なお、押さえ板１０、不透水膜１６の端部、リ
ング部材１１、スペーサリング１３、押さえ板９
には螺子棒８に合致する挿通孔（図示せず）を穿
設してある。 Note that the holding plate 10, the end of the impermeable membrane 16, the ring member 11, the spacer ring 13, and the holding plate 9
An insertion hole (not shown) that fits the screw rod 8 is bored in the hole.
次いで、管体ｂを後部パツキン６の内周部に摺
接させながら、シールド掘削機ａの後端に当接さ
せる。この時、後部パツキン６は第４図に示すよ
うに、断面舌片状に屈曲し、その内周端はシール
ド掘削機ａの後端から僅かに離間して状態とな
る。 Next, the tubular body b is brought into contact with the rear end of the shield excavator a while slidingly contacting the inner peripheral part of the rear packing 6. At this time, as shown in FIG. 4, the rear gasket 6 is bent to have a tongue-shaped cross section, and its inner peripheral end is slightly spaced from the rear end of the shield excavator a.
しかるのち、ナツト２４を外してスペーサリン
グ１３を取り外し、再びナツト２４を締めつける
と、後部パツキン６の取付部が前進して第５図に
示すように、その内周端がシールド掘削機ａの後
端に当接し、屈曲部がＳ字状に湾曲して前方に摺
動しようとする力を蓄積した状態で固定する。 After that, when the nut 24 is removed, the spacer ring 13 is removed, and the nut 24 is tightened again, the attachment part of the rear gasket 6 moves forward, and as shown in FIG. It is fixed in a state in which the bent part is curved in an S-shape and accumulates a force that tends to slide forward.
この状態から、管体ｂを推進させてシールド掘
削機ａと共に前進させると、管体ｂの外周面に密
着している後部パツキン６の内周部が延伸してシ
ールド掘削機ａの後端から滑り落ちた前部パツキ
ン５の内周端部をその内周部表面で受止させ、両
パツキン５，６の重合部間で不透水膜１６を挟圧
する。 From this state, when the tube body b is propelled forward together with the shield excavator a, the inner circumferential part of the rear gasket 6 that is in close contact with the outer circumferential surface of the tube body b stretches and extends from the rear end of the shield excavator a. The inner circumferential end of the front packing 5 that has slipped is received on the inner circumferential surface thereof, and the water-impermeable membrane 16 is compressed between the overlapping portions of the two packings 5 and 6.
ここで、前記スペーサリング１３を使用しない
場合には、管体ｂを推進させた時に後部パツキン
６の内周端がシールド掘削機ａの後端と管体ｂの
前端面間で挟着される虞れが生じるので、人手に
より管体ｂの外周面に摺接する後部パツキン６を
第５図に示すように、後方に引き寄せてやらなて
ければならない。この作業には相当の力を要し且
つ手間取るので、前述したのようにスペーサリン
グ１３を介在させているものである。 Here, if the spacer ring 13 is not used, the inner peripheral end of the rear packing 6 will be pinched between the rear end of the shield excavator a and the front end surface of the tube b when the tube b is propelled. To prevent this, the rear gasket 6, which slides into contact with the outer peripheral surface of the tube body b, must be manually pulled rearward as shown in FIG. 5. Since this operation requires considerable force and time, the spacer ring 13 is interposed as described above.
こうして前後パツキン５，６の内周端部を管体
ｂの外周面に重合状態で密着させたのち、注入パ
イプ１４からベントナイト等の泥水（非硬化性で
且つ粘性を有するものが望ましい）をリング部材
１１の内側に注入すると、泥水は不透水膜１６と
後部パツキン６間で囲まれた空間に注入され、両
者の重合部を押し拡げながら不透水膜１６の内周
面と管体ｂの外周面間に圧入して不透水膜１６を
管体ｂの外周面から離間する方向に押し拡げる。 After the inner peripheral ends of the front and rear packings 5 and 6 are brought into close contact with the outer peripheral surface of the tube body b in a polymerized state, muddy water such as bentonite (preferably non-hardening and viscous material) is poured into the ring from the injection pipe 14. When injected into the inside of the member 11, the muddy water is injected into the space surrounded by the impermeable membrane 16 and the rear gasket 6, and while pushing and expanding the overlapping area between the two, the inner peripheral surface of the impermeable membrane 16 and the outer periphery of the tube body b are The water-impermeable membrane 16 is press-fitted between the surfaces and expanded in a direction away from the outer peripheral surface of the tube body b.
この泥水を地下水圧以上の圧力で常に前記空間
部に充填させておくことにより、不透水膜１６は
管体ｂに接することがない。こうして、管体ｂの
後端を推進ジヤツキ（図示せず）で押し、該管体
ｂを介してシールド掘削機ａを掘進させていく
と、管体ｂの外周全面に泥水を介して不透水膜１
６を被覆していくことができる。 By constantly filling the space with this muddy water at a pressure higher than the groundwater pressure, the impermeable membrane 16 does not come into contact with the pipe body b. In this way, when the rear end of the tube b is pushed by a propulsion jack (not shown) and the shield excavator a is made to dig through the tube b, the entire outer circumference of the tube b is impermeable through muddy water. Membrane 1
6 can be coated.
又、シールド掘削機ａが坑口４を通過する直前
においては、前部パツキン５がシールド掘削機ａ
の後端外周面に接する一方、後部パツキン６は管
体ｂの外周面に接する状態となつて、シールド掘
削機ａと管体ｂとの接合部に段差が生じているに
も拘わらず、確実な止水作用を奏することができ
る。 Also, just before the shield excavator a passes the tunnel entrance 4, the front packing 5 is attached to the shield excavator a.
While in contact with the outer peripheral surface of the rear end, the rear gasket 6 is in contact with the outer peripheral surface of the tube body b, and even though there is a step at the joint between the shield excavator a and the tube body b, It can exhibit a water-stopping effect.
第８図及び第９図は後部パツキン６の別な構造
を示すもので、前部パツキン５と重合する内周部
対向面に周方向に適宜間隔毎に条溝１９を放射状
に刻設してなるものであり、このように形成する
と、両パツキン５，６の重合部又は不透水膜と後
部パツキン６との重合部から滑材や裏込材を該条
溝１９を通して管体ｂの外周面側に円滑に流出さ
せることができる。 FIGS. 8 and 9 show another structure of the rear packing 6, in which grooves 19 are radially carved at appropriate intervals in the circumferential direction on the inner peripheral facing surface that overlaps with the front packing 5. When formed in this way, the lubricating material or lining material is passed through the groove 19 from the overlapping part of the two packings 5 and 6 or the overlapping part of the impermeable membrane and the rear packing 6 to the outer circumferential surface of the tube body b. It can be flowed smoothly to the side.
又、第１０図及び第１１図に示すように、前部
パツキン５と重合する内周部対向面に周方向に適
宜間隔毎にスリツト或いは切目２０を放射状に刻
設しておくと、前記条溝１９と同一作用を奏する
以外に、管体ｂとの摩擦摺接力が小さくなつて内
周部の伸びを減少させることができる。 Further, as shown in FIGS. 10 and 11, if slits or cuts 20 are radially carved at appropriate intervals in the circumferential direction on the inner circumferential opposing surface that overlaps with the front packing 5, the above-mentioned In addition to having the same effect as the groove 19, the frictional sliding contact force with the tube body b is reduced, and the elongation of the inner peripheral portion can be reduced.
（考案の効果）
以上のように本考案の坑口パツキンによれば、
坑口の周辺部に、内周部が坑口に向かつて突出し
た前後一対のパツキンを固定すると共にこれらの
前後パツキン間に不透水膜の端部を挟設して固定
し、坑口から推進するヒユーム管等の管体外周面
に接して前方に屈曲した後部パツキンの外周部上
に不透水膜を介して前部パツキンの屈曲内周部を
重合させるように構成したことを特徴とするもの
であるから、シールド掘削機内に格納した不透水
膜をシールド掘削機に後続して推進する管体に被
覆する際に、該シールド掘削機の後端から引き出
される不透水膜を前後パツキンの重合部で挟持し
て該不透水膜が管体に摺接するのを確実に防止す
ることができ、管体を推進させても不透水膜が破
損する虞れがないものである。(Effect of the invention) As described above, according to the wellhead packing of the invention,
A pair of front and rear gaskets, whose inner circumferential portions protrude toward the mine entrance, are fixed around the mine entrance, and an end of an impermeable membrane is sandwiched and fixed between these front and rear gaskets, and the hume pipe is propelled from the mine entrance. The invention is characterized in that the bent inner periphery of the front packing is superimposed on the outer periphery of the rear packing, which is bent forward in contact with the outer periphery of the tube body, with an impermeable membrane interposed therebetween. When the impermeable membrane stored in the shield excavator is coated on the pipe body that is propelled after the shield excavator, the impermeable membrane pulled out from the rear end of the shield excavator is held between the overlapping parts of the front and rear packings. The water-impermeable membrane can be reliably prevented from coming into sliding contact with the pipe body, and there is no possibility that the water-impermeable film will be damaged even if the pipe body is propelled.
又、シールド掘削機と該シールド掘削機に接続
する管体との接合部に段差が生じている場合にお
いても、シールド掘削機の後端外周面と管体の前
端外周面とに前後パツキンを夫々密接させ、この
状態で推進させて管体の外周面に前後パツキンの
内周部を重合させることができるので、シールド
掘削機の発進時において確実な止水を可能にする
ものである。 In addition, even if there is a step between the shield excavator and the pipe body connected to the shield excavator, the front and rear gaskets can be installed on the outer peripheral surface of the rear end of the shield excavator and the outer peripheral surface of the front end of the pipe body, respectively. Since the inner peripheral parts of the front and rear packings can be brought into close contact with each other and propelled in this state, the inner peripheral parts of the front and rear packings can be superimposed on the outer peripheral surface of the pipe body, thereby making it possible to ensure water stoppage when the shield excavator starts.
図面は本考案の実施例を示すもので、第１図は
使用状態を示す縦断側面図、第２図は乃至第５図
は不透水膜を管体に被覆する場合の工程を示す縦
断側面図、第６図は後部パツキンの一部正面図、
第７図はその横断面図、第８図は後部パツキンの
別な実施例を示す一部正面図、第９図はその横断
面図、第１０図は後部パツキンのさらに別な実施
例を示す一部正面図、第１１図はその横断面図で
ある。
４……坑口、５，６……前後パツキン、８……
螺子棒、９，１０……押さえ板、１１……リング
部材、２４……ナツト、ａ……シールド掘削機、
ｂ……管体。
The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal side view showing the state of use, and FIGS. 2 to 5 are longitudinal side views showing the process of coating a pipe body with an impermeable membrane. , Figure 6 is a partial front view of the rear packing,
Fig. 7 is a cross-sectional view thereof, Fig. 8 is a partial front view showing another embodiment of the rear packing, Fig. 9 is a cross-sectional view thereof, and Fig. 10 is a further embodiment of the rear packing. A partial front view is shown, and FIG. 11 is a cross-sectional view thereof. 4... Mine mouth, 5, 6... Front and rear packing, 8...
Screw rod, 9, 10...pressing plate, 11...ring member, 24...nut, a...shield excavator,
b... tube body.
Claims (1)
しながら地中に推進する際に、発進立坑の坑口
に取付ける坑口パツキンであつて、坑口の周辺
部に、内周部が坑口に向かつて突出した前後一
対のパツキンを固定すると共にこれらの前後パ
ツキン間に不透水膜の端部を挟設して固定し、
坑口から推進する管体の外周面に接して前方に
屈曲した後部パツキンの外周部上に不透水膜を
介して前部パツキンの屈曲内周部を重合させる
ように構成したことを特徴とする坑口パツキ
ン。 前部パツキンに対向する後部パツキンの内周
部に内周端から外周方向に向かう複数条の溝を
放射状に設けている実用新案登録請求の範囲第
１項記載の坑口パツキン。 後部パツキンの内周端部に複数のスリツトを
放射状に設けている実用新案登録請求の範囲第
１項記載の坑口パツキン。[Scope of Claim for Utility Model Registration] A wellhead gasket to be attached to the mouth of a starting shaft when the pipe body is covered with an impermeable membrane such as a cylindrical sheet and propelled underground, , fixing a pair of front and rear packings whose inner peripheral parts protrude toward the mine entrance, and sandwiching and fixing the end of the impermeable membrane between these front and rear packings;
A wellhead characterized in that the bent inner circumferential part of the front packing is superimposed on the outer circumferential part of the rear packing which is bent forward in contact with the outer circumferential surface of the pipe body propelled from the wellhead, with an impermeable membrane interposed therebetween. Patsukin. The wellhead packing according to claim 1, wherein a plurality of grooves are provided radially from the inner circumferential end toward the outer circumferential direction on the inner circumference of the rear packing opposite to the front packing. The wellhead packing according to claim 1, wherein a plurality of slits are radially provided at the inner circumferential end of the rear packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986122545U JPH0412147Y2 (en) | 1986-08-08 | 1986-08-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986122545U JPH0412147Y2 (en) | 1986-08-08 | 1986-08-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6331197U JPS6331197U (en) | 1988-02-29 |
| JPH0412147Y2 true JPH0412147Y2 (en) | 1992-03-25 |
Family
ID=31012832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986122545U Expired JPH0412147Y2 (en) | 1986-08-08 | 1986-08-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0412147Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001182476A (en) * | 1999-12-24 | 2001-07-06 | Showa Kogyo Kk | Entrance seal device for drift excavation machine |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01270169A (en) * | 1988-04-21 | 1989-10-27 | Nippon Telegr & Teleph Corp <Ntt> | Language analyzer |
| JPH0617914Y2 (en) * | 1988-07-28 | 1994-05-11 | 株式会社金澤製作所 | Seal plate for opening |
| JPH0786312B2 (en) * | 1990-04-07 | 1995-09-20 | 株式会社金澤製作所 | Vertical tunnel segment connection structure |
| JP5265313B2 (en) * | 2008-11-13 | 2013-08-14 | 株式会社フジタ | Entrance for starting shield machine |
| JP2012097421A (en) * | 2010-10-29 | 2012-05-24 | Daiei Kensetsu Kk | Water cut-off device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4919765U (en) * | 1972-05-22 | 1974-02-19 | ||
| JPS50111843A (en) * | 1974-02-12 | 1975-09-02 | ||
| JPS60129396A (en) * | 1983-12-16 | 1985-07-10 | 五洋建設株式会社 | Water stopping method at insert end part in small diameter pipe propelling method |
-
1986
- 1986-08-08 JP JP1986122545U patent/JPH0412147Y2/ja not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4919765U (en) * | 1972-05-22 | 1974-02-19 | ||
| JPS50111843A (en) * | 1974-02-12 | 1975-09-02 | ||
| JPS60129396A (en) * | 1983-12-16 | 1985-07-10 | 五洋建設株式会社 | Water stopping method at insert end part in small diameter pipe propelling method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001182476A (en) * | 1999-12-24 | 2001-07-06 | Showa Kogyo Kk | Entrance seal device for drift excavation machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6331197U (en) | 1988-02-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0412147Y2 (en) | ||
| US4321740A (en) | Methods and apparatus for relining service pipe | |
| JP4647414B2 (en) | Saya tube propulsion method | |
| US5181746A (en) | Sealing sleeve and its use | |
| JPH0526394Y2 (en) | ||
| US4901424A (en) | Method of forming an end seal for a pipe liner | |
| JPH10299383A (en) | Jack pipe device | |
| JPH0332621Y2 (en) | ||
| JPH0515850B2 (en) | ||
| JP2003329170A (en) | Method for lining inside surface of pipe | |
| JPH0547830Y2 (en) | ||
| JPH022142Y2 (en) | ||
| JP5344784B2 (en) | Saya tube propulsion method | |
| EP0725205A1 (en) | Devices and method to stop water inflow to an underground pipe laying work area | |
| JP3290549B2 (en) | Connection structure and method of pipe to manhole | |
| JP2851065B2 (en) | Packing material | |
| JPS6117100Y2 (en) | ||
| JP4638287B2 (en) | Saya tube propulsion method | |
| JP2811549B2 (en) | Wellhead packing device | |
| JPH0131672Y2 (en) | ||
| JPS622197B2 (en) | ||
| JP2798740B2 (en) | Structure of terminal opening of underground pipeline | |
| SU1571156A1 (en) | Method of laying pipelines | |
| JPH0434314Y2 (en) | ||
| JPH05272684A (en) | Pipe coupling for connecting branched pipe |