EP0257287B1 - Pressure-sealed pipe joint for a driving pipe made of steel - Google Patents

Pressure-sealed pipe joint for a driving pipe made of steel Download PDF

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Publication number
EP0257287B1
EP0257287B1 EP87110368A EP87110368A EP0257287B1 EP 0257287 B1 EP0257287 B1 EP 0257287B1 EP 87110368 A EP87110368 A EP 87110368A EP 87110368 A EP87110368 A EP 87110368A EP 0257287 B1 EP0257287 B1 EP 0257287B1
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EP
European Patent Office
Prior art keywords
pipe
section
pipe section
steel
arm
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Expired - Lifetime
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EP87110368A
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German (de)
French (fr)
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EP0257287A1 (en
Inventor
& Widmann Aktiengesellschaft Dyckerhoff
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Walter Bau AG
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Dyckerhoff and Widmann AG
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Priority to AT87110368T priority Critical patent/ATE50315T1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • E21D11/385—Sealing means positioned between adjacent lining members
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/08—Casing joints
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/005—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit

Definitions

  • the invention relates to a pressure-tight pipe connection for a pipe made of a number of steel pipe sections, manufactured in the pre-pressing process with a primarily no longer accessible cross-section, in which the pipe sections, each a spigot end and a sleeve end formed by a steel ring connected to the pipe with an angular cross-section have, can be connected to each other in a pressure-tight manner by plugging into one another, the longer leg of the sleeve extending in the pipe axis protruding beyond the pipe end and the shorter leg running at right angles to the pipe axis and the outer diameter of the sleeve being smaller than the inner diameter of the jacking pipe.
  • underground pre-compression processes can be used, which work either on the soil displacement or the soil extraction principle.
  • Protective or product pipes are pressed or retracted into the cavity, either by displacing the floor or by removing the floor, immediately or after completion of the cavity.
  • thin-walled jacking pipes usually made of steel, must first be pressed into which the product pipes are then pulled or pressed. The annular space between the jacking pipes and the product pipes is filled in subsequently. The jacking pipes cannot be recovered; You are lost.
  • jacking pipes that have been lost must be designed and connected to one another in such a way that they are pressed correctly and can follow the opened cavity as an articulated chain.
  • a pipe connection that is tight against pressurized water and that enables the safe absorption of any transverse forces that may occur is necessary above all below the groundwater table.
  • the shorter leg of the angular steel ring continues the cross section of the pipe section with which it is butt-connected; the longer leg forms the sleeve (special print from "Civil Engineering - Civil Engineering - Road Construction", No. 2 + 3, 1983, pp. 3 to 10).
  • the spigot end of the subsequent pipe section is supported directly against the steel ring, so that the driving force is passed through the steel ring and its connection to the pipe section.
  • the steel ring must therefore have a fit, which requires a correspondingly complex manufacture.
  • the tip end of a pipe section is formed on a steel ring welded to the inside of the pipe wall and can be inserted into an end groove on the socket end of the subsequent pipe section (DE-A 3 222 880).
  • An intermediate sleeve of this type consists of two annular, telescopically displaceable parts, one of which is detachably connected to the jacking pipe and the other to the product pipe.
  • a sealing ring is arranged between the mutually displaceable areas of these parts (DE-A 2 720 039).
  • the invention has for its object to provide a socket connection for a pipeline of the type specified, in which the individual pipe sections have the possibility during propulsion to follow the opened cavity as a pressure-resistant articulated chain, but the socket connection itself should remain unloaded by longitudinal forces, which furthermore is pressure-tight against water and also ensures the required positive locking.
  • this object is achieved in that the shorter leg forming a flange is attached to the inner wall of the pipe section shortly before the actual end of the pipe section, e.g. is welded, and that the longer leg forms with its outer surface a sealing surface for a sealing ring which is arranged on the inner surface of the tip end of the pipe section to be connected and is supported against a shoulder of an abutment arranged on the inner surface and that in the region of the pipe joint a radial guide for Prevention of transverse displacements of the pipe ends is provided.
  • the longer leg of the steel ring expediently has a wedge-shaped run-up at its outer end.
  • the radial guide to prevent transverse displacements of the pipe ends expediently consists of guide blocks which are attached to the outer surface of the longer leg of the steel ring and distributed evenly over the circumference.
  • the guide blocks can have a wedge-shaped run-up at their outer end.
  • the tip end of a pipe weft can be chamfered on the outer surface.
  • the shoulder for supporting the sealing ring is expediently formed on a flat iron ring which is attached to the inner surface of the pipe end at the tip end at a distance from its end, e.g. is welded on.
  • the advantage of the invention is seen essentially in the fact that a simple possibility has been created with economic means, a pipe pipeline while maintaining an immediate pressure-resistant butt joint of the pipe sections with transmission of the jacking force within the cross-section of the pipe wall when jacking as jacking pipe in the event of deviations from the jacking axis to allow certain angular changes to follow in the manner of an articulated chain - while maintaining the seal and the positive locking.
  • the sleeve connection is not loaded by axial forces and, since the sealing ring acts between sealing surfaces parallel to the pipe wall, offers sufficient freedom of movement.
  • Both the approach shaft A and the target shaft Z can be produced in a manner known per se by installing sheet pile, slotted or pile walls or the like and excavating the ground.
  • the shaft bottom is below the groundwater level 2.
  • Both the approach shaft A and the target shaft Z each consist of a shaft wall 3 and a base plate 4. In the wall 3 of the start shaft A there is an opening 5 for the passage of the jacking pipe 6, which is provided with a sliding seal.
  • the advance pipe 6 is pressed by means of a drilling device 7 with a drilling head 8 which is pressed against the face in the direction of arrow 9 and which causes the soil to be broken down in a rotating movement and / or by rinsing with water.
  • the driving force required for the pre-pressing of the jacking pipe 6 is generated in the approach shaft A by hydraulic presses, the effect of which is indicated by an arrow 10.
  • FIG. 2 and 3 each show in a detail from a longitudinal section through one of the pipe joints 11 (Fig. 1) on a larger scale the formation of a pipe connection according to the invention.
  • the connection of two pipe sections 6a and 6b is shown, only the socket end 12 of the pipe section 6a and the spigot end 13 of the pipe section 6b being shown.
  • an angular steel ring 15 is fastened to the inside of the pipe section 6a shortly before its actual end 14, which consists of an axially extending longer leg 16 and a shorter leg 17 extending at right angles to it. With the end of this shorter leg 17, the steel ring 15 is welded to the inner wall 18 of the pipe section 6a.
  • the longer leg 16 has a wedge-shaped run-up 20 on its outer surface 19, which also acts as a sealing surface.
  • a flat iron ring 23 is welded to the inner wall 21 of the pipe section 6b at a distance from its end 22, the outer, radially extending end face 24 of which forms a shoulder for a sealing ring 25.
  • the sealing ring 25 itself consists of a lower contact part 26, with which it rests on the inner wall 21 of the pipe section 6b and is supported against the shoulder 24, and an upstanding bead 27, which in the pre-pressing direction (arrow 9) has an oblique contact surface 28 and on the Back has a recess 29.
  • the pipe connection is created when two pipe sections are pushed together when a new pipe section is placed in approach shaft A.
  • the sealing ring 25 with the inclined contact surface 28 initially slides onto the wedge-shaped section 20 of the steel ring 15, as a result of which the pipe section 6b is roughly centered.
  • the bead 27 of the sealing ring 25 onto the contact surface 20 of the bead 27 it is folded against the pre-pressing direction.
  • the bead 27 rests on the contact part 26, that is to say the recess 29 is closed.
  • the sealing ring 25 acts like a one-piece, compact profile.
  • Guide blocks 30, which are arranged as evenly as possible on the outer surface 19 of the steel ring 15 directly between the end faces of the pipe sections 6a, 6b (FIG. 6a, 6b) serve to center the tip end 13 when the pipes are pushed together and to secure the transverse connection 3 and 4).
  • the guide blocks 30 are expediently welded to the steel ring 15.
  • the guide blocks 30 also have a wedge-shaped run-up 32 at the outer end, onto which the front end 22 of the tip end 13 of the pipe section 6b can slide when the pipes are pushed together.
  • the tip end 13 of the pipe section 6b is provided with a chamfer 33 at the outer end so that, when further transverse movements should occur during the course of the advance, the sliding resistance of the jacking pipe in the ground is not by a shoulder, albeit a low one.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Earth Drilling (AREA)
  • Joints With Sleeves (AREA)

Abstract

A steel pipeline to be driven through an earth section without disturbing the overlying earth is made up of a plurality of serially arranged axially extending pipe sections each having a leading end and a trailing end. The leading end of each pipe section abuts the trailing end of the pipe section previously driven into the earth section. A pressure-tight pipe connection between the abutting ends of the pipe sections is formed by a steel ring secured within the trailing end of the pipe section and projecting axially out of the trailing end. The steel ring has an outside diameter smaller than the inside diameter of the section. The leading end of the next pipe section has an elastic material sealing ring secured to its inside surface with the sealing ring projecting radially inwardly beyond the outside surface of the steel ring. The steel ring contacts the sealing ring and deforms it into a pressure-tight seal when the leading end of the next pipe section abuts tightly against the trailing end of the previously driven pipe section. The pipe connection permits angular deviation between the axes of the pipe sections with stops located in the pipe section affording a shear force lock between the abutting pipe sections.

Description

Die Erfindung betrifft eine druckdichte Rohrverbindung für eine aus einer Anzahl von stählernen Rohrschüssen bestehende, im Vorpreßverfahren hergestellte Rohrleitung mit vornehmlich nicht mehr begehbarem Querschnitt, bei der die Rohrschüsse, die jeweils ein Spitzende und ein durch einen mit dem Rohr verbundenen Stahlring gebildetes Muffenende mit winkelförmigem Querschnitt aufweisen, durch Ineinanderstecken druckfest miteinander verbindbar sind, wobei der längere, in der Rohrachse verlaufende Schenkel der Muffe über das Rohrende hinausragt und der kürzere Schenkel rechtwinklig zur Rohrachse verläuft und wobei der Außendurchmesser der Muffe geringer ist als der Innendurchmesser des Vortriebsrohres.The invention relates to a pressure-tight pipe connection for a pipe made of a number of steel pipe sections, manufactured in the pre-pressing process with a primarily no longer accessible cross-section, in which the pipe sections, each a spigot end and a sleeve end formed by a steel ring connected to the pipe with an angular cross-section have, can be connected to each other in a pressure-tight manner by plugging into one another, the longer leg of the sleeve extending in the pipe axis protruding beyond the pipe end and the shorter leg running at right angles to the pipe axis and the outer diameter of the sleeve being smaller than the inner diameter of the jacking pipe.

Für die Herstellung von nicht mehr begehbaren Rohrleitungen bis zu einem Innendurchmesser von etwa 1.000 mm kommen unterirdische Vorpreßverfahren in Betracht, die entweder nach dem Bodenverdrängungs- oder dem Bodenentnahmeprinzip arbeiten. In den, sei es durch Bodenverdrängung, sei es durch Bodenentnahme erzeugten Hohlraum werden sofort oder nach Fertigstellung des Hohlraumes Schutz- oder Produktrohre eingepreßt oder eingezogen. Oft müssen zunächst dünnwandige, meist aus Stahl bestehende Vortriebsrohre eingepreßt werden, in die danach die Produktrohre eingezogen oder eingedrückt werden. Der Ringraum zwischen den Vortriebsrohren und den Produktrohren wird nachträglich ausgefüllt. Die Vortriebsrohre können nicht wiedergewonnen werden; sie sind verloren.For the production of inaccessible pipelines up to an inner diameter of approximately 1,000 mm, underground pre-compression processes can be used, which work either on the soil displacement or the soil extraction principle. Protective or product pipes are pressed or retracted into the cavity, either by displacing the floor or by removing the floor, immediately or after completion of the cavity. Often, thin-walled jacking pipes, usually made of steel, must first be pressed into which the product pipes are then pulled or pressed. The annular space between the jacking pipes and the product pipes is filled in subsequently. The jacking pipes cannot be recovered; You are lost.

Gleichwohl müssen auch verlorene Vortriebsrohre so ausgebildet und miteinander verbunden werden, daß sie einwandfrei vorgepreßt werden und als Gelenkkette dem aufgefahrenen Hohlraum folgen können. Vor allem unterhalb des Grundwasserspiegels ist eine Rohrverbindung notwendig, die dicht ist gegen Druckwasser und die eine sichere Aufnahme etwa auftretender Querkräfte ermöglicht.Nevertheless, jacking pipes that have been lost must be designed and connected to one another in such a way that they are pressed correctly and can follow the opened cavity as an articulated chain. A pipe connection that is tight against pressurized water and that enables the safe absorption of any transverse forces that may occur is necessary above all below the groundwater table.

Bei einer bekannten Rohrverbindung dieser Art setzt der kürzere Schenkel des winkelförmigen Stahlrings den Querschnitt des Rohrschusses fort, mit dem er stumpf verbunden ist; der längere Schenkel bildet die Muffe (Sonderdruck aus "Tiefbau - Ingenieurbau - Straßenbau ", Nr. 2 + 3, 1983, S. 3 bis 10). Dabei stützt sich das Spitzende des anschließenden Rohrschusses unmittelbar gegen den Stahlring ab, so daß die Vortriebskraft durch den Stahlring und seine Verbindung mit dem Rohrschuß hindurchgeleitet wird. Der Stahlring muß somit eine Passung aufweisen, was eine entsprechend aufwendige Herstellung bedingt.In a known pipe connection of this type, the shorter leg of the angular steel ring continues the cross section of the pipe section with which it is butt-connected; the longer leg forms the sleeve (special print from "Civil Engineering - Civil Engineering - Road Construction", No. 2 + 3, 1983, pp. 3 to 10). The spigot end of the subsequent pipe section is supported directly against the steel ring, so that the driving force is passed through the steel ring and its connection to the pipe section. The steel ring must therefore have a fit, which requires a correspondingly complex manufacture.

Bei einer Rohrverbindung eines wiedergewinnbaren stählernen Vortriebsrohres ist das Spitzende eines Rohrschusses an einem innen an die Rohrwandung angeschweißten Stahlring gebildet und in eine stirnseitige Nut am Muffenende des anschließenden Rohrschusses einsteckbar (DE-A 3 222 880).In the case of a pipe connection of a recoverable steel jacking pipe, the tip end of a pipe section is formed on a steel ring welded to the inside of the pipe wall and can be inserted into an end groove on the socket end of the subsequent pipe section (DE-A 3 222 880).

Am Grunde der Nut ist ein Einlagestück aus elastischem Material angeordnet, das die Vortriebskräfte zu übertragen hat und der Verbindung eine gelenkartige Wirkung verleiht. Die Fuge zwischen den beiden Rohrschüssen ist in üblicher Weise gedichtet und durch ein Schleppblech abgedeckt. Bei dieser Rohrverbindung, bei der die Vortriebskraft exzentrisch zum Rohrquerschnitt übertragen wird, kann ein gewisser Aufwand für die Ausbildung der Rohrverbindung in Kauf genommen werden, da die Vortriebsrohre durch Produktrohre ersetzt und wiedergewonnen werden. Die einzelnen Rohrschüsse können hier also maschinenmäßig ausgebildet werden, was bei verlorenen Vortriebsrohren aus wirtschaftlichen Gründen nicht möglich ist.At the bottom of the groove there is an insert made of elastic material which has to transmit the driving forces and which gives the connection a joint-like effect. The joint between the two pipe sections is sealed in the usual way and covered by a drag plate. With this pipe connection, in which the jacking force is transferred eccentrically to the pipe cross-section, a certain amount of effort can be taken to form the pipe connection, since the jacking pipes are replaced and recovered by product pipes. The individual pipe sections can therefore be constructed here in terms of machines, which is not possible for economic reasons if the jacking pipes are lost.

Schließlich ist es bei Vorpreßverfahren auch bekannt, zwischen einem Vortriebsrohr und einem anschließenden Produktrohr als Dehnerstation eine teleskopierbare Zwischenmuffe zwischenzuschalten. Eine Zwischenmuffe dieser Art besteht aus zwei ringförmigen, teleskopartig gegeneinander verschiebbaren Teilen, von denen eines mit dem Vortriebsrohr und das andere mit dem Produktrohr lösbar verbunden sind. Zwischen den gegeneinander verschiebbaren Bereichen dieser Teile ist ein Dichtungsring angeordnet (DE-A 2 720 039).Finally, in the case of pre-pressing processes, it is also known to interpose a telescopic intermediate sleeve between a jacking pipe and a subsequent product pipe as an expansion station. An intermediate sleeve of this type consists of two annular, telescopically displaceable parts, one of which is detachably connected to the jacking pipe and the other to the product pipe. A sealing ring is arranged between the mutually displaceable areas of these parts (DE-A 2 720 039).

Der Erfindung liegt die Aufgabe zugrunde, für eine Rohrleitung der eingangs angegebenen Art eine Muffenverbindung anzugeben, bei der die einzelnen Rohrschüsse beim Vortrieb die Möglichkeit haben, als druckfeste Gelenkkette dem aufgefahrenen Hohlraum zu folgen, die Muffenverbindung selbst aber durch Längskräfte unbelastet bleiben soll, die ferner gegen Wasser druckdicht ist und außerdem die erforderliche Querkraftschlüssigkeit sicherstellt.The invention has for its object to provide a socket connection for a pipeline of the type specified, in which the individual pipe sections have the possibility during propulsion to follow the opened cavity as a pressure-resistant articulated chain, but the socket connection itself should remain unloaded by longitudinal forces, which furthermore is pressure-tight against water and also ensures the required positive locking.

Nach der Erfindung wird diese Aufgabe dadurch gelöst, daß der kürzere, einen Flansch bildende Schenkel kurz vor dem eigentlichen Ende des Rohrschusses an der Innenwand des Rohrschusses befestigt, z.B. angeschweißt ist, und daß der längere Schenkel mit seiner Außenfläche eine Dichtfläche für einen Dichtring bildet, der an der Innenfläche des Spitzendes des anzuschließenden Rohrschusses angeordnet und gegen eine Schulter eines an der Innenfläche angeordneten Widerlagers abgestützt ist und daß im Bereich des Rohrstoßes eine radiale Führung zur Verhinderung von Querverschiebungen der Rohrenden vorgesehen ist. Der längere Schenkel des Stahlrings weist an seinem äußeren Ende zweckmäßig einen keilförmigen Anlauf auf.According to the invention, this object is achieved in that the shorter leg forming a flange is attached to the inner wall of the pipe section shortly before the actual end of the pipe section, e.g. is welded, and that the longer leg forms with its outer surface a sealing surface for a sealing ring which is arranged on the inner surface of the tip end of the pipe section to be connected and is supported against a shoulder of an abutment arranged on the inner surface and that in the region of the pipe joint a radial guide for Prevention of transverse displacements of the pipe ends is provided. The longer leg of the steel ring expediently has a wedge-shaped run-up at its outer end.

Die radiale Führung zur Verhinderung von Querverschiebungen der Rohrenden besteht zweckmäßig aus Führungsklötzchen, die gleichmäßig über den Umfang verteilt an der Außenfläche des längeren Schenkels des Stahlringes befestigt sind. Die Führungsklötzchen können an ihrem äußeren Ende einen keilförmigen Anlauf aufweisen.The radial guide to prevent transverse displacements of the pipe ends expediently consists of guide blocks which are attached to the outer surface of the longer leg of the steel ring and distributed evenly over the circumference. The guide blocks can have a wedge-shaped run-up at their outer end.

Das Spitzende eines Rohrschusses kann an der Außenfläche mit einer Abschrägung versehen sein.The tip end of a pipe weft can be chamfered on the outer surface.

Die Schulter zur Abstützung des Dichtringes ist zweckmäßig an einem Flacheisenring gebildet, der am Spitzende des Rohrschusses im Abstand von seinem Ende an dessen Innenfläche befestigt, z.B. angeschweißt ist.The shoulder for supporting the sealing ring is expediently formed on a flat iron ring which is attached to the inner surface of the pipe end at the tip end at a distance from its end, e.g. is welded on.

Der Vorteil der Erfindung wird im wesentlichen darin gesehen, daß mit wirtschaftlichen Mitteln eine einfache Möglichkeit geschaffen wurde, eine Rohrleitung unter Aufrechterhaltung einer unmittelbaren druckfesten Stoßverbindung der Rohrschüsse mit Übertragung der Vortriebskraft innerhalb des Querschnitts der Rohrwandung beim Vortrieb als Vortriebsrohr bei Abweichungen von der Vortriebsachse gewissen Winkeländerungen nach Art einer Gelenkkette - unter -Aufrechterhaltung der Dichtung und der Querkraftschlüssigkeit folgen zu lassen. Die Muffenverbindung ist dabei von axialen Kräften unbelastet und bietet, da der Dichtring zwischen zur Rohrwandung parallelen Dichtflächen wirkt, ausreichende Bewegungsmöglichkeit.The advantage of the invention is seen essentially in the fact that a simple possibility has been created with economic means, a pipe pipeline while maintaining an immediate pressure-resistant butt joint of the pipe sections with transmission of the jacking force within the cross-section of the pipe wall when jacking as jacking pipe in the event of deviations from the jacking axis to allow certain angular changes to follow in the manner of an articulated chain - while maintaining the seal and the positive locking. The sleeve connection is not loaded by axial forces and, since the sealing ring acts between sealing surfaces parallel to the pipe wall, offers sufficient freedom of movement.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigt

  • Fig. 1 in einem Längsschnitt die Darstellung eines Vorpreßverfahrens für ein Vortriebsrohr zwischen einem Anfahrschacht und einem Zielschacht,
  • Fig. 2 einen Längsschnitt durch eine erfindungsgemäße Rohrverbindung vor dem Zusammenschieben zweier Rohrenden,
  • Fig. 3 einen der Fig. 2 entsprechenden Längsschnitt nach dem Zusammenschieben der Rohrenden und
  • Fig. 4 einen Querschnitt entlang der Linie IV-IV in Fig. 3.
The invention is explained below with reference to an embodiment shown in the drawing. It shows
  • 1 shows in a longitudinal section the illustration of a pre-pressing method for a jacking pipe between a start-up shaft and a target shaft,
  • 2 shows a longitudinal section through a pipe connection according to the invention before pushing two pipe ends together,
  • Fig. 3 shows a longitudinal section corresponding to Fig. 2 after pushing the pipe ends and
  • FIG. 4 shows a cross section along the line IV-IV in FIG. 3.

Zur Herstellung einer unterirdischen Rohrleitung im Rohrvorpreßverfahren sind in der Regel zwei Schachtanlagen erforderlich, nämlich ein Anfahrschacht A und ein Zielschacht Z. Zwischen diesen Schachtanlagen wird die Rohrleitung im unterirdischen Vorpreßverfahren vorgetrieben, wobei die Geländeoberfläche 1 nicht beeinträchtigt wird. Sowohl der Anfahrschacht A, wie auch der Zielschacht Z können in an sich bekannter Weise durch den Einbau von Spund-, Schlitz- oder Pfahlwänden oder dergleichen und Aushub des Bodens hergestellt werden. Im dargestellten Ausführungsbeispiel befindet sich die Schachtsohle unterhalb des Grundwasserspiegels 2. Sowohl der Anfahrschacht A, wie auch der Zielschacht Z bestehen jeweils aus einer Schachtwandung 3 und einer Sohlplatte 4. In der Wandung 3 des Anfahrschachtes A befindet sich eine Öffnung 5 für den Durchtritt des Vortriebsrohres 6, die mit einer Gleitdichtung versehen ist.To produce an underground pipeline using the pipe pre-pressing process, two shaft systems are usually required, namely a start-up shaft A and a target shaft Z. Between these shaft systems, the pipeline is driven in the underground pre-pressing process, the terrain surface 1 being unaffected. Both the approach shaft A and the target shaft Z can be produced in a manner known per se by installing sheet pile, slotted or pile walls or the like and excavating the ground. In the illustrated embodiment, the shaft bottom is below the groundwater level 2. Both the approach shaft A and the target shaft Z each consist of a shaft wall 3 and a base plate 4. In the wall 3 of the start shaft A there is an opening 5 for the passage of the jacking pipe 6, which is provided with a sliding seal.

Das Vorpressen des Vortriebsrohres 6 erfolgt im dargestellten Ausführungsbeispiel mittels eines Bohrgerätes 7 mit einem Bohrkopf 8, der beim Vortrieb in Richtung des Pfeiles 9 gegen die Ortsbrust gedrückt wird und in drehender Bewegung und/oder durch Spülen mit Wasser den Abbau des Bodens bewirkt. Die für das Vorpressen des Vortriebsrohres 6 erforderliche Vortriebskraft wird im Anfahrschacht A durch hydraulische Pressen erzeugt, deren Wirkung durch einen Pfeil 10 angedeutet ist.In the exemplary embodiment shown, the advance pipe 6 is pressed by means of a drilling device 7 with a drilling head 8 which is pressed against the face in the direction of arrow 9 and which causes the soil to be broken down in a rotating movement and / or by rinsing with water. The driving force required for the pre-pressing of the jacking pipe 6 is generated in the approach shaft A by hydraulic presses, the effect of which is indicated by an arrow 10.

In den Fig. 2 und 3 ist jeweils in einem Ausschnitt aus einem Längsschnitt durch einen der Rohrstöße 11 (Fig. 1) in größerem Maßstab die Ausbildung einer Rohrverbindung nach der Erfindung dargestellt. Gezeigt ist die Verbindung zweier Rohrschüsse 6a und 6b, wobei von dem Rohrschuß 6a lediglich das Muffenende 12 und von dem Rohrschuß 6b das Spitzende 13 dargestellt sind.2 and 3 each show in a detail from a longitudinal section through one of the pipe joints 11 (Fig. 1) on a larger scale the formation of a pipe connection according to the invention. The connection of two pipe sections 6a and 6b is shown, only the socket end 12 of the pipe section 6a and the spigot end 13 of the pipe section 6b being shown.

Zur Bildung des Muffenendes 12 ist an der Innenseite des Rohrschusses 6a kurz vor dessen eigentlichem Ende 14 ein winkelförmiger Stahlring 15 befestigt, der aus einem axial verlaufenden längeren Schenkel-16 und einem rechtwinklig dazu verlaufenden flanschartig ausgebildeten kürzeren Schenkel 17 besteht. Mit dem Ende dieses kürzeren Schenkels 17 ist der Stahlring 15 an der Innenwand 18 des Rohrschusses 6a angeschweißt. Der längere Schenkel 16 besitzt an seiner Außenfläche 19, die auch als Dichtfläche wirkt, einen keilförmigen Anlauf 20.To form the socket end 12, an angular steel ring 15 is fastened to the inside of the pipe section 6a shortly before its actual end 14, which consists of an axially extending longer leg 16 and a shorter leg 17 extending at right angles to it. With the end of this shorter leg 17, the steel ring 15 is welded to the inner wall 18 of the pipe section 6a. The longer leg 16 has a wedge-shaped run-up 20 on its outer surface 19, which also acts as a sealing surface.

Das Spitzende 13 des Rohrschusses 6b ist an diesem selbst ausgebildet. An der Innenwand 21 des Rohrschusses 6b ist im Abstand von dessen Ende 22 ein Flacheisenring 23 angeschweißt, dessen äußere, radial verlaufende Stirnfläche 24 eine Schulter für einen Dichtring 25 bildet. Der Dichtring 25 selbst besteht aus einem unteren Anlageteil 26, mit dem er an der Innenwand 21 des Rohrschusses 6b anliegt und sich gegen die Schulter 24 abstützt sowie aus einem aufragenden Wulst 27, der in Vorpreßrichtung (Pfeil 9) eine schräge Anlauffläche 28 und auf der Rückseite eine Ausnehmung 29 besitzt.The tip end 13 of the pipe section 6b is formed thereon. A flat iron ring 23 is welded to the inner wall 21 of the pipe section 6b at a distance from its end 22, the outer, radially extending end face 24 of which forms a shoulder for a sealing ring 25. The sealing ring 25 itself consists of a lower contact part 26, with which it rests on the inner wall 21 of the pipe section 6b and is supported against the shoulder 24, and an upstanding bead 27, which in the pre-pressing direction (arrow 9) has an oblique contact surface 28 and on the Back has a recess 29.

Die Rohrverbindung kommt beim Zusammenschieben zweier Rohrschüsse beim Ansetzen jeweils eines neuen Rohrschusses im Anfahrschacht A zustande. Wenn der anzusetzende Rohrschuß 6b in Vortriebsrichtung (Pfeil 9) gegen den letzten Rohrschuß 6a geschoben wird, gleitet der Dichtring 25 mit der schrägen Anlauffläche 28 zunächst auf den keilförmigen Anlauf 20 des Stahlrings 15 auf, wodurch der Rohrschuß 6b grob zentriert wird. Zugleich wird schon während des Aufgleitens des Wulstes 27 des Dichtrings 25 auf die Anlauffläche 20 der Wulst 27 entgegen der Vorpreßrichtung umgelegt. In dem in Fig. 3 dargestellten Endzustand liegt der Wulst 27 auf dem Anlageteil 26 auf, ist also die Ausnehmung 29 geschlossen. Der Dichtring 25 wirkt so wie ein einteiliges, kompaktes Profil.The pipe connection is created when two pipe sections are pushed together when a new pipe section is placed in approach shaft A. When the pipe section 6b to be attached is pushed in the direction of advance (arrow 9) against the last pipe section 6a, the sealing ring 25 with the inclined contact surface 28 initially slides onto the wedge-shaped section 20 of the steel ring 15, as a result of which the pipe section 6b is roughly centered. At the same time, during the sliding of the bead 27 of the sealing ring 25 onto the contact surface 20 of the bead 27, it is folded against the pre-pressing direction. In the final state shown in FIG. 3, the bead 27 rests on the contact part 26, that is to say the recess 29 is closed. The sealing ring 25 acts like a one-piece, compact profile.

Zur Feinzentrierung des Spitzendes 13 beim Zusammenschieben der Rohre und zur Sicherung des Querkraftschlusses im Endzustand der Rohrverbindung dienen Führungsklötzchen 30, die möglichst gleichmäßig verteilt auf der Außenfläche 19 des Stahlrings 15 unmittelbar innerhalb der Preßfuge 31 zwischen den Stirnflächen der Rohrschüsse 6a, 6b angeordnet sind (Fig. 3 und 4). Die Führungsklötzchen 30 sind zweckmäßig mit dem Stahlring 15 verschweißt. Auch die Führungsklötzchen 30 besitzen am äußeren Ende einen keilförmigen Anlauf 32, auf den das stirnseitige Ende 22 des Spitzendes 13 des Rohrschusses 6b beim Zusammenschieben der Rohre aufgleiten kann.Guide blocks 30, which are arranged as evenly as possible on the outer surface 19 of the steel ring 15 directly between the end faces of the pipe sections 6a, 6b (FIG. 6a, 6b) serve to center the tip end 13 when the pipes are pushed together and to secure the transverse connection 3 and 4). The guide blocks 30 are expediently welded to the steel ring 15. The guide blocks 30 also have a wedge-shaped run-up 32 at the outer end, onto which the front end 22 of the tip end 13 of the pipe section 6b can slide when the pipes are pushed together.

Da auch der nach der Erfindung erreichbare Querkraftschluß nicht immer völlig spielfrei gewährleistet werden kann, ist das Spitzende 13 des Rohrschusses 6b am äußeren Ende mit einer Abschrägung 33 versehen, um, wenn beim weiteren Vortrieb geringe Querverschiebungen auftreten sollten, den Gleitwiderstand des Vortriebsrohres im Boden nicht durch eine wenn auch niedrige Schulter zu vergrößern.Since the shear force connection that can be achieved according to the invention cannot always be guaranteed to be completely free of play, the tip end 13 of the pipe section 6b is provided with a chamfer 33 at the outer end so that, when further transverse movements should occur during the course of the advance, the sliding resistance of the jacking pipe in the ground is not by a shoulder, albeit a low one.

Da die Längsachse des Vortriebsrohres einem Polygonzug folgt, lassen sich geringe Winkeldrehungen in den Rohrverbindungen meist nicht vermeiden. Deshalb ist es zweckmäßig, in der Preßfuge 31 zwischen den stirnseitigen Enden der Rohrschüsse 6a und 6b eine Zwischenlage aus einem elastoplastisch verformbaren Material, z.B. eine Papierdichtung, anzuordnen.Since the longitudinal axis of the jacking pipe follows a polygon, it is usually not possible to avoid slight angular rotations in the pipe connections. It is therefore expedient to insert an intermediate layer made of an elastoplastically deformable material in the pressure joint 31 between the front ends of the pipe sections 6a and 6b, e.g. a paper seal to arrange.

Claims (7)

1. A pressure-tight pipe coupling for a pipeline consisting of a number of steel pipe sections (6a, 6b), produced in an advancing-pushing operation and generally of a cross-section not allowing access thereto, wherein the pipe sections, each of which has a spigot (13) and a socket (12) of angular cross-section and formed by a steel ring (15) connected to the pipe, can be joined together in a pressure-resistant manner by being fitted into one another, wherein the longer arm (16) of the socket extending on the pipe axis projects beyond the pipe end (14) and the shorter arm (17) extends at right angles to the pipe axis, and wherein the outer diameter of the socket is smaller than the inner diameter of the driving pipe, characterised in that the shorter arm (17) forming a flange is secured, e.g. welded, to the inner wall (18) of the pipe section (6a, 6b) just before the end (14) proper of the pipe section (6a, 6b), and in that with its outer surface (19) the longer arm (16) forms a sealing surface for a sealing ring (25) which is provided on the inner surface (21) of the spigot (13) of the pipe section (6a, 6b) to be connected and which bears against a shoulder (24) of an abutment (23) provided on the inner surface (21), and in that a radial guide (30) for preventing transverse displacement of the pipe ends is provided in the vicinity of the pipe joint.
2. A pipe coupling according to Claim 1, characterised in that the longer arm (16) of the steel ring (15) has a wedge-shaped ramp (20) at its outer end.
3. A pipe coupling according to Claim 1 or 2, characterised in that the radial guide comprises guide blocks (30) which are spaced apart uniformly over the periphery on the outer surface (19) of the arm (16).
4. A pipe coupling according to Claim 3, characterised in that at their outer end the guide blocks (30) have a wedge-shaped ramp (32).
5. A pipe coupling according to any of Claims 1 to 4, characterised in that the spigot (13) of a pipe section is provided at the outer surface with a tapered portion (33).
6. A pipe coupling according to any of Claims 1 to 6, characterised in that the shoulder (24) is formed on a flat iron ring (23) which at the spigot (13) of the pipe section (6b) is secured, e.g. welded, to the inner surface (21) thereof at a distance from its end (22).
7. A pipe coupling according to any of Claims 1 to 6, characterised in that the sealing ring (24) comprises a bearing member (26) with a lower bearing surface and an end support surface extending substantially at right angles thereto, and also comprises a bead (27) which projects from the bearing member (26) in the manner of a lip and which at the front end has an inclined abutment surface (28) and at the rear end an angular recess (29) with one upwardly projecting arm and one horizontal arm, which arms form a maximum angle of 90°, whereupon, when the pipe ends are fitted into one another, the bead (27) is deformable in such a way that the recess is closed in its final position.
EP87110368A 1986-08-08 1987-07-17 Pressure-sealed pipe joint for a driving pipe made of steel Expired - Lifetime EP0257287B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87110368T ATE50315T1 (en) 1986-08-08 1987-07-17 PRESSURE-TIGHT PIPE CONNECTION FOR A STEEL JACKING PIPE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863626988 DE3626988A1 (en) 1986-08-08 1986-08-08 PRESSURE-TIGHT PIPE CONNECTION FOR A STEEL DRIVE TUBE
DE3626988 1986-08-08

Publications (2)

Publication Number Publication Date
EP0257287A1 EP0257287A1 (en) 1988-03-02
EP0257287B1 true EP0257287B1 (en) 1990-02-07

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Application Number Title Priority Date Filing Date
EP87110368A Expired - Lifetime EP0257287B1 (en) 1986-08-08 1987-07-17 Pressure-sealed pipe joint for a driving pipe made of steel

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US (1) US4801222A (en)
EP (1) EP0257287B1 (en)
JP (1) JPS63103197A (en)
AT (1) ATE50315T1 (en)
DE (1) DE3626988A1 (en)
ES (1) ES2013744B3 (en)

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Also Published As

Publication number Publication date
US4801222A (en) 1989-01-31
ES2013744B3 (en) 1990-06-01
ATE50315T1 (en) 1990-02-15
DE3626988A1 (en) 1988-02-18
DE3626988C2 (en) 1989-09-07
EP0257287A1 (en) 1988-03-02
JPS63103197A (en) 1988-05-07

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