EP0174268A1 - Injection tube for the application of injections for soil stabilisation - Google Patents

Injection tube for the application of injections for soil stabilisation Download PDF

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Publication number
EP0174268A1
EP0174268A1 EP85730097A EP85730097A EP0174268A1 EP 0174268 A1 EP0174268 A1 EP 0174268A1 EP 85730097 A EP85730097 A EP 85730097A EP 85730097 A EP85730097 A EP 85730097A EP 0174268 A1 EP0174268 A1 EP 0174268A1
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EP
European Patent Office
Prior art keywords
flap
elements
soil
lugs
compression tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85730097A
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German (de)
French (fr)
Inventor
Klaus Dipl.-Ing. Richter
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Gte Gesellschaft fur Technische Entwicklung AG
Original Assignee
Gte Gesellschaft fur Technische Entwicklung AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gte Gesellschaft fur Technische Entwicklung AG filed Critical Gte Gesellschaft fur Technische Entwicklung AG
Publication of EP0174268A1 publication Critical patent/EP0174268A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil

Definitions

  • the invention relates to a compression tube for use in ground consolidation injections according to the preamble of the main claim.
  • injections are made via grouting pipes embedded in the soil, the chemical or solid injection agent penetrating into the pores of the soil and solidifying after a short period of time.
  • So-called steel sleeve pipes which are drilled at regular intervals, are known as grouting pipes, the respective drilled holes being covered with a rubber sleeve which is pulled over the pipe. If the injection agent is injected, the rubber sleeve is inflated under pressure and the injection agent gets into the ground.
  • Such cuff tubes have the disadvantage that they are cumbersome to handle due to their length and that the rubber cuffs pulled over the tube wear out relatively quickly.
  • a large proportion of the injected injection agent is passed axially up or down directly on the tube, since only narrow outflow slots are exposed due to the elasticity of the rubber. Therefore, the injection agent does not mix properly with the floor surrounding the sleeve part of the pipe.
  • the invention is therefore based on the object of providing a compression tube for use in ground consolidation injections which is simple to use, has a long service life and permits good distribution of the injection agent into the ground to be consolidated.
  • the compression tube consists of individual segments, which are inserted into each other when they are inserted into the borehole in the ground, so that an arbitrarily long tube results, the handling, transport and storage of compression tubes are extremely simple, so that the tubes according to the invention can be used particularly advantageously in narrow work areas, for example in galleries.
  • the transport of the grouting pipes can, for example take place in lattice boxes so that small and compact transport vehicles can be used.
  • the flap-like elements open outwards under the pressure of the injection agent like a hinge, so that the injection agent is largely pushed out perpendicular to the axis of the compression tube.
  • the outwardly directed lugs on the circumference of the segments determine the outflow direction of the injection means, so that additional measures for an outflow perpendicular to the pipe axis and thus better mixing of the injection agent with the floor area surrounding the pipe are achieved.
  • the compression tube is drawn with 10, which is composed of several segments 11 during admission into the borehole, not shown, of the soil to be consolidated.
  • the segments 11 are preferably designed as plastic tubes and are widened at one end so that they can be inserted one into the other without a substantial change in the inside diameter of the entire pressing tube 10.
  • flap-like elements 13 are provided, distributed uniformly in the radial and axial directions, which are designed as lugs pressed out of the circumferential surface of the segment 11 by means of heat or under pressure.
  • lugs are preferably slotted on three sides, so that there is in each case a flap 14 which covers an opening 15 exposed by the slits.
  • 1 shows two exemplary embodiments of the flap-like elements 13.
  • the one exemplary embodiment which is shown in more detail in FIG. 2, is designed as a nose 16 shaped obliquely upwards, while the second embodiment shown in the lower region of the segment 11 shows a straight nose 17.
  • the slits of the lugs 16, 17 are made in such a way that on the circumference of the segments In each case, an outwardly facing, fixed extension 18 remains, which is opposite the flap 14.
  • a notch 19 is provided in the hinged area of the flap 14, by means of which the effect as a hinge is improved.
  • the flap 14 is brought into the position shown in dash-dotted lines in FIG. 2 and the injection medium, which is shown by the dashed arrow 20, comes out of the compression tube outside, the direction of flow being substantially perpendicular to the axis of the compression tube 10.
  • the approach 18 also directs the flow in the direction shown by the arrow 20. If the pressure in the interior of the compression tube 10 decreases, a pressure p reacts , which is predetermined by the floor surrounding the compression tube 10 or by the locking means surrounding the compression tube, from the outside on the flap 14, so that it is closed again.
  • the flap 14 is connected in its lower region to the circumferential surface of the segment 11 and opens upwards.
  • the folding direction can also be different.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

An injection tube is proposed which is let into the soil and through which the injection medium is pressed into the soil. The injection tube consists of a multiplicity of telescoped tube segments (11) which have flap-like elements (13) on their circumference. The flap-like elements (13) are pushed outwards under the pressure of the injection medium and clear openings (15). <IMAGE>

Description

Die Erfindung betrifft ein Verpreßrohr zur Verwendung bei Injektionen zur Bodenverfestigung nach der Gattung des Hauptanspruchs.The invention relates to a compression tube for use in ground consolidation injections according to the preamble of the main claim.

Um rollige Böden zu verfestigen, werden Injektionen über in den Boden eingelassene Verpreßrohre vorgenommen, wobei das chemische oder das Feststoffinjektionsmittel in die Poren des Bodens eindringt und nach kurzem Zeitraum erstarrt. Als Verpreßrohre sind sogenannte Manschettenrohre aus Stahl bekannt, die in regelmäßigen Abständen durchbohrt sind, wobei die jeweiligen Durchbohrungen mit einer Gummimanschette, die über das Rohr übergezogen ist, abgedeckt werden. Wird das Injektionsmittel eingepreßt, so wird die Gummimanschette unter Druck aufgeblasen und das Injektionsmittel gelangt in den Boden.In order to solidify uneven soils, injections are made via grouting pipes embedded in the soil, the chemical or solid injection agent penetrating into the pores of the soil and solidifying after a short period of time. So-called steel sleeve pipes, which are drilled at regular intervals, are known as grouting pipes, the respective drilled holes being covered with a rubber sleeve which is pulled over the pipe. If the injection agent is injected, the rubber sleeve is inflated under pressure and the injection agent gets into the ground.

Derartige Manschettenrohre weisen den Nachteil auf, daß sie hinten aufgrund ihrer Länge umständlich zu handhaben sind und daß die über das Rohr gezogenenGummimanschetten verhältnismäßig schnell verschleißen. Außerdem wird ein großer Anteil des eingepreßten Injektionsmittels direkt an dem Rohr axial nach oben oder unten geleitet, da durch die Elastizität des Gummis nur schmale Ausströmschlitze freigelegt werden. Daher vermischt sich das Injektionsmittel nicht einwandfrei mit dem den Manschettenteil des Rohres umgebenden Boden.Such cuff tubes have the disadvantage that they are cumbersome to handle due to their length and that the rubber cuffs pulled over the tube wear out relatively quickly. In addition, a large proportion of the injected injection agent is passed axially up or down directly on the tube, since only narrow outflow slots are exposed due to the elasticity of the rubber. Therefore, the injection agent does not mix properly with the floor surrounding the sleeve part of the pipe.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Verpreßrohr zur Verwendung bei Injektionen zur Bodenverfestigung zu schaffen, das einfach in der Handhabung ist, eine lange Lebensdauer aufweist und eine gute Verteilung des Injektionsmittels in den zu verfestigenden Boden erlaubt.The invention is therefore based on the object of providing a compression tube for use in ground consolidation injections which is simple to use, has a long service life and permits good distribution of the injection agent into the ground to be consolidated.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Hauptanspruchs in Verbindung mit den Merkmalen des Oberbegriffs gelöst.This object is achieved according to the invention by the characterizing features of the main claim in conjunction with the features of the preamble.

Dadurch, daß das Verpreßrohr aus einzelnen Segmenten besteht, die jeweils beim Einlassen in das Bohrloch im Boden ineinandergesteckt werden, so daß sich ein beliebig langes Rohr ergibt, sind die Handhabung, der Transport und die Lagerung von Verpreßrohren äußerst einfach, so daß die erfindungsgemäßen Rohre insbesondere in engen Arbeitsbereichen, zum Beispiel in Stollen vorteilhaft angewendet werden können. Der Transport der Verpreßrohre kann zum Beispiel in Gitterboxen erfolgen, so daß kleine und kompakte Transportfahrzeuge verwendet werden können. Die klappenartigen Elemente öffnen sich unter den Druck des Injektionsmittels wie an einem Scharnier nach außen, so daß das Injektionsmittel weitgehend senkrecht zur Achse des Verpreßrohres herausgedrückt wird..The fact that the compression tube consists of individual segments, which are inserted into each other when they are inserted into the borehole in the ground, so that an arbitrarily long tube results, the handling, transport and storage of compression tubes are extremely simple, so that the tubes according to the invention can be used particularly advantageously in narrow work areas, for example in galleries. The transport of the grouting pipes can, for example take place in lattice boxes so that small and compact transport vehicles can be used. The flap-like elements open outwards under the pressure of the injection agent like a hinge, so that the injection agent is largely pushed out perpendicular to the axis of the compression tube.

Durch die in den Unteransprüchen angegebenen Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen möglich. Besonders vorteilhaft ist, daß durch die gleichmäßig an dem Umfang der einzelnen Segmente nach außen ausgeformten, geschlitzten Nasen eine größere Stabilität des Verpreßrohres erreicht wird, wobei gleichzeitig die Nasen bei der Einführung des Verpreßrohres die Zentrierung im Bohrloch sicherstellen.Advantageous further developments and improvements are possible through the measures specified in the subclaims. It is particularly advantageous that a greater stability of the grouting tube is achieved by the slotted lugs which are uniformly formed on the circumference of the individual segments, and at the same time the lugs ensure centering in the borehole when the grouting tube is inserted.

Die nach außen gerichteten am Umfang der Segmente feststehenden Ansätze geben die Ausströmrichtung des Injektionsmittels vor, so daß zusätzliche Maßnahmen für eine Ausströmung senkrecht zur Rohrachse und damit eine bessere Durchmischung des Injektionsmittels mit dem das Rohr umgebenden Bodenbereich erreicht werden.The outwardly directed lugs on the circumference of the segments determine the outflow direction of the injection means, so that additional measures for an outflow perpendicular to the pipe axis and thus better mixing of the injection agent with the floor area surrounding the pipe are achieved.

Die Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

  • Fig. 1 einen Längsschnitt durch einen Teil des erfindungsgemäßen Verpreßrohres; und
  • Fig. 2 einen Längsschnitt in größerer Darstellung durch ein klappenartiges Element.
The invention is illustrated in the drawing and is explained in more detail in the description below. Show it:
  • 1 shows a longitudinal section through part of the compression tube according to the invention. and
  • Fig. 2 shows a longitudinal section in a larger representation through a flap-like element.

In der Fig. 1 ist mit lO das Verpreßrohr gezeichnet, das während des Einlassens in das nicht näher dargestellte Bohrloch des zu verfestigenden Bodens aus mehreren Segmenten 11 zusammengesetzt wird. Die Segmente 11 sind vorzugsweise als Kunststoffrohre ausgebildet und sind an einem Ende aufgeweitet, damit sie ohne wesentliche Änderung des Innendurchmessers des gesamten Verpreßrohres 10 ineinandergesteckt werden können. Selbstverständlich sind auch andere Verbindungsmöglichkeiten der einzelnen Rohrsegmente 11 denkbar, wobei sichergestellt sein sollte, daß der Innendurchmesser sich nicht wesentlich verändert. Auf dem Umfang der Segmente 11 sind in radialer und axialer Richtung gleichmäßig verteilt klappenartige Elemente 13 vorgesehen, die als aus der Umfangsfläche des Segmentes 11 mittels Wärme oder unter Druck herausgedrückte Nasen ausgebildet sind. Diese Nasen sind vorzugsweise an drei Seiten eingeschlitzt, so daß sich jeweils eine Klappe 14 ergibt, die eine durch die Einschlitzungen freigelegte Öffnung 15 abdeckt. In der Fig. 1 sind zwei Ausführungsbeispiele der klappenartigen Elemente 13 dargestellt. Das eine Ausführungsbeispiel, das näher in Fig. 2 gezeigt ist, ist als schräg nach oben ausgeformte Nase 16 ausgebildet, während die zweite im unteren Bereich des Segmentes 11 dargestellte Ausführungsform eine gerade ausgeformte Nase 17 zeigt. Die Einschlitzungen der Nasen 16, 17 sind in der Weise vorgenommen, daß an dem Umfang der Segmente jeweils ein nach außen weisender feststehender Ansatz 18 stehenbleibt, der der Klappe 14 gegenüberliegt. Im Abklappbereich der Klappe 14 ist eine Einkerbung 19 vorgesehen, durch die die Wirkung als Scharnier verbessert wird.In Fig. 1, the compression tube is drawn with 10, which is composed of several segments 11 during admission into the borehole, not shown, of the soil to be consolidated. The segments 11 are preferably designed as plastic tubes and are widened at one end so that they can be inserted one into the other without a substantial change in the inside diameter of the entire pressing tube 10. Of course, other connection options for the individual pipe segments 11 are also conceivable, it being necessary to ensure that the inside diameter does not change significantly. On the circumference of the segments 11, flap-like elements 13 are provided, distributed uniformly in the radial and axial directions, which are designed as lugs pressed out of the circumferential surface of the segment 11 by means of heat or under pressure. These lugs are preferably slotted on three sides, so that there is in each case a flap 14 which covers an opening 15 exposed by the slits. 1 shows two exemplary embodiments of the flap-like elements 13. The one exemplary embodiment, which is shown in more detail in FIG. 2, is designed as a nose 16 shaped obliquely upwards, while the second embodiment shown in the lower region of the segment 11 shows a straight nose 17. The slits of the lugs 16, 17 are made in such a way that on the circumference of the segments In each case, an outwardly facing, fixed extension 18 remains, which is opposite the flap 14. A notch 19 is provided in the hinged area of the flap 14, by means of which the effect as a hinge is improved.

Wird das Injektionsmittel mit dem als Pfeil dargestellten Druck P innerhalb des Verpreßrohres 10 eingepreßt, so wird die Klappe 14 in die in der Fig. 2 strichpunktiert dargestellte Stellung gebracht und das Injektionsmittel, das durch den gestrichelten Pfeil 20 dargestellt ist, gelangt aus dem Verpreßrohr nach außen, wobei die Strömungsrichtung im wesentlichen senkrecht zur Achse des Verpreßrohres 10 liegt. Dabei lenkt der Ansatz 18 die Strömung zusätzlich in die durch den Pfeil 20 dargestellte Richtung. Läßt der Druck im Innenraum des Verpreßrohres 10 nach, so wirkt ein Druck p rück, der durch den das Verpreßrohr 10 umgebenden Boden oder durch das das Verpreßrohr umgebende Sperrmittel vorgegeben ist, von außen auf die Klappe 14, so daß diese wieder geschlossen wird.If the injection medium is pressed in with the pressure P shown as an arrow inside the compression tube 10, the flap 14 is brought into the position shown in dash-dotted lines in FIG. 2 and the injection medium, which is shown by the dashed arrow 20, comes out of the compression tube outside, the direction of flow being substantially perpendicular to the axis of the compression tube 10. The approach 18 also directs the flow in the direction shown by the arrow 20. If the pressure in the interior of the compression tube 10 decreases, a pressure p reacts , which is predetermined by the floor surrounding the compression tube 10 or by the locking means surrounding the compression tube, from the outside on the flap 14, so that it is closed again.

Im vorliegenden Ausführungsbeispiel ist die Klappe 14 in ihrem unteren Bereich mit der Umfangsfläche des Segmentes 11 verbunden und klappt nach oben auf. Selbstverständlich kann die Abklapprichtung auch eine andere sein.In the present exemplary embodiment, the flap 14 is connected in its lower region to the circumferential surface of the segment 11 and opens upwards. Of course, the folding direction can also be different.

Claims (5)

1. Verpreßrohr zur Verwendung bei Injektionen zur Bodenverfestigung, das in den Boden eingelassen und durch das das Injektionsmittel in den Boden eingepreßt wird, dadurch gekennzeichnet, daß es aus einer Vielzahl von ineinandergesteckten Rohrsegmenten (11) besteht, die auf ihren Umfängen klappenartige Elemente (13) aufweisen, die unter dem Druck des Injektionsmittels nach außen weggedrückt werden und öffnungen (15) freigeben.1. grouting tube for use in soil consolidation injections, which is let into the soil and through which the injection agent is pressed into the soil, characterized in that it consists of a plurality of nested tube segments (11), the flap-like elements (13 ) which are pushed outwards under the pressure of the injection agent and open openings (15). 2. Verpreßrohr nach Anspruch 1, dadurch gekennzeichnet, daß zur Vereinfachung des Abklappens des klappenartigen Elementes (13) an der Verbindungsstelle zwischen klappenartigem Element (13) und Umfangsfläche des Segmentes (11) eine Einkerbung (19) vorgesehen ist.2. Compression tube according to claim 1, characterized in that a notch (19) is provided to simplify the folding of the flap-like element (13) at the junction between the flap-like element (13) and the peripheral surface of the segment (11). 3. Verpreßrohr nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die klappenartigen Elemente (13) als aus der Umfangsfläche der Segmente (11) herausgedrückte Nasen (16,17) ausgebildet sind, die jeweils zur Bildung einer die öffnung (15) abdeckenden Klappe (14) an drei Seiten eingeschlitzt sind.3. Compression tube according to claim 1 or 2, characterized in that the flap-like elements (13) are formed as lugs (16, 17) pushed out from the peripheral surface of the segments (11), each of which forms a flap covering the opening (15) (14) are slotted on three sides. 4. Verpreßrohr nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Einschlitzungen der Nasen (16,17) derart vorgenommen sind, daß an dem Umfang des Segmentes (11) nach außen gewölbte feststehende Ansätze (18) stehenbleiben.4. grouting pipe according to one of claims 1 to 3, characterized in that the slots of the lugs (16, 17) are made such that on the periphery of the segment (11) outwardly arched fixed lugs (18) remain. 5. Verpreßrohr nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß mehrere klappenartige Elemente (13) in radialer und axialer Richtung gleichmäßig an dem Umfang eines Segmentes (11) angeordnet sind, wobei in axialer Richtung gesehen benachbarte klappenartige Elemente (13) gegeneinander versetzt sind.5. Compression tube according to one of claims 1 to 4, characterized in that a plurality of flap-like elements (13) in the radial and axial direction are arranged uniformly on the circumference of a segment (11), with adjacent flap-like elements (13) seen against one another in the axial direction are offset.
EP85730097A 1984-08-13 1985-07-19 Injection tube for the application of injections for soil stabilisation Withdrawn EP0174268A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3866/84 1984-08-13
CH386684A CH664589A5 (en) 1984-08-13 1984-08-13 INJECTION PIPE FOR USE IN GROUND FASTENING INJECTIONS.

Publications (1)

Publication Number Publication Date
EP0174268A1 true EP0174268A1 (en) 1986-03-12

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EP85730097A Withdrawn EP0174268A1 (en) 1984-08-13 1985-07-19 Injection tube for the application of injections for soil stabilisation

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EP (1) EP0174268A1 (en)
CH (1) CH664589A5 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614982A1 (en) * 1986-05-02 1987-11-05 Juergen Kessel Injection pipe
EP1650356A1 (en) * 2004-10-20 2006-04-26 Ed. Züblin Ag Method of optimising an injection into a soil

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE191286C (en) *
US1404925A (en) * 1918-03-16 1922-01-31 Blumenthal Maurice Method of and apparatus for making foundations
US1480878A (en) * 1919-08-05 1924-01-15 Blumenthal Maurice Means for and method of producing concrete piles
FR1010103A (en) * 1948-05-20 1952-06-09 Foundation pile or pile
WO1982001732A1 (en) * 1980-11-13 1982-05-27 Anton Styger Prefabricated split and rammed pile made with steel tube,of square,rectangular or round shape
FR2552462A1 (en) * 1983-09-27 1985-03-29 Acaplast Injection tube for soil strengthening products

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE191286C (en) *
US1404925A (en) * 1918-03-16 1922-01-31 Blumenthal Maurice Method of and apparatus for making foundations
US1480878A (en) * 1919-08-05 1924-01-15 Blumenthal Maurice Means for and method of producing concrete piles
FR1010103A (en) * 1948-05-20 1952-06-09 Foundation pile or pile
WO1982001732A1 (en) * 1980-11-13 1982-05-27 Anton Styger Prefabricated split and rammed pile made with steel tube,of square,rectangular or round shape
FR2552462A1 (en) * 1983-09-27 1985-03-29 Acaplast Injection tube for soil strengthening products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614982A1 (en) * 1986-05-02 1987-11-05 Juergen Kessel Injection pipe
EP1650356A1 (en) * 2004-10-20 2006-04-26 Ed. Züblin Ag Method of optimising an injection into a soil

Also Published As

Publication number Publication date
CH664589A5 (en) 1988-03-15

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