EP0726383B2 - Injektionsanker für Tunnel und Gräben - Google Patents

Injektionsanker für Tunnel und Gräben Download PDF

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Publication number
EP0726383B2
EP0726383B2 EP96101053A EP96101053A EP0726383B2 EP 0726383 B2 EP0726383 B2 EP 0726383B2 EP 96101053 A EP96101053 A EP 96101053A EP 96101053 A EP96101053 A EP 96101053A EP 0726383 B2 EP0726383 B2 EP 0726383B2
Authority
EP
European Patent Office
Prior art keywords
tube
elements
ground
reinforcing elements
tunnels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96101053A
Other languages
English (en)
French (fr)
Other versions
EP0726383A1 (de
EP0726383B1 (de
Inventor
Giuseppe Vago
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sireg SpA Italiana Di Ricerca Elementi Per Geotecnica Soc
Original Assignee
Sireg SpA Italiana Di Ricerca Elementi Per Geotecnica Soc
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
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Application filed by Sireg SpA Italiana Di Ricerca Elementi Per Geotecnica Soc filed Critical Sireg SpA Italiana Di Ricerca Elementi Per Geotecnica Soc
Publication of EP0726383A1 publication Critical patent/EP0726383A1/de
Application granted granted Critical
Publication of EP0726383B1 publication Critical patent/EP0726383B1/de
Publication of EP0726383B2 publication Critical patent/EP0726383B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
    • 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
    • E21D9/001—Improving soil or rock, e.g. by freezing; Injections
    • 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
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
    • E21D9/0671—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end with means for consolidating the rock in front of the shield by injection of consolidating substances through boreholes

Definitions

  • the present invention relates to a device for consolidating and stabilizing ground, to preventing collapse or deformation of the ground during excavation of tunnels or trenches.
  • a device having the features as set forth in the preamble portion of claim 1 is known for example from FR-A-2,101,916.
  • the boreholes are then filled with cement mortar, which acts as a binding and retaining element.
  • the small area of contact between the tube and the cement mortar and the low adhesion coefficient of the tube surface do not allow the resistance of the reinforcement to be transmitted completely to the ground, thus leaving it partly unused.
  • the aim of the present invention is to overcome all the disadvantages listed above, providing a device for stabilizing the excavation or working face and preventing landslides or deformation of the ground in tunnels or trenches, which ensures that the reinforcement is highly resistant.
  • Another aim of the invention is to allow the high tensile strength of the reinforcement to be transmitted to the injection mixture even over very short lengths.
  • Yet another aim of the invention is to guarantee complete and uniform distribution of the cement mixture inside the borehole by means of a plastic tube, advantageously with valves.
  • Yet another aim of the invention is to guarantee the possibility of inserting reinforcements of any length, even in very small spaces and without transport problems, with no breaks or falls in the strength of the reinforcements along the entire borehole.
  • It comprises a plurality of strong elements, made from glass fibres impregnated with synthetic resins (fibreglass-reinforced plastic) mounted by means of centering spacers around a plastic injection tube, preferably a valved tube.
  • the device is kept perfectly centered in the injection mixture by means of centering spacers; in this way the surfaces of the reinforcement, consisting of fiberglass-reinforced plastic straps, are completely surrounded by the cement, and a possible surface treatment of the straps with quartz sand allows a complete bond between reinforcement and injected mixture, thus allowing the reinforcement's strengthening capacity to be completely transmitted to the ground.
  • the strengthening elements of the device that is the straps, can be rolled for transport, and the device itself can be assembled directly near the borehole, allowing continuous reinforcements to be made, without any break in strength, with a length of the order of a hundred metres.
  • Structural elements 4 are inserted in the ground 3 and in the front 1, in order to consolidate the ground.
  • the structural elements inserted in the excavation front 1 serve as reinforcements for consolidation and stabilization of the ground, so as to prevent landslides or deformation of the ground during excavation of the tunnel.
  • the structural elements 4 for consolidation of the front 1 consist of a device comprising a tube 5 which in the figures is shown as a tube with valves around which a plurality of fiberglass straps 7 (three in the example) are positioned by means of centering spacers 6.
  • the centering spacers 6 are put on the tube 5, whilst the strong fiberglass straps 7 are fitted outside them and fixed to them by means of fastening elements 8 consisting, for example, of a metal band or a binding of fiberglass reinforced adhesive tape.
  • the tube 5 is provided with "manchette" valves 10 (i.e. valves comprising an elastic annular band around a perforated portion of the tube) which, as is known, when subjected to pressure within the tube 5, allow the injection mixture to escape through the holes 11 (see Figure 4), completely surrounding the straps 7 and completely filling the borehole 20 in which the device is inserted.
  • "manchette" valves 10 i.e. valves comprising an elastic annular band around a perforated portion of the tube
  • a quartz sand coating is advantageously applied to the surface of said straps, making it possible to obtain a very high friction coefficient and a good chemical compatibility with the injection mixtures.
  • the device according to the invention also has the peculiarity of being able to be assembled easily near the borehole.
  • the fiberglass straps 7 can be rolled in the desired length with an external diameter of less than 2.30 metres, whilst the tubes 5, manufactured in the desired lengths, have threaded ends 30 and are complete with coupling sleeves 31, threaded on the inside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Piles And Underground Anchors (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Joining Of Building Structures In Genera (AREA)

Claims (6)

  1. Vorrichtung für die Erdarmierung, -befestigung und -stabilisation, die zur Verhinderung von Erdrutschen oder Verformungen an der Vortriebsstelle in Tunnels oder Straßeneinschnittausgrabungen geeignet ist, die ein Einspritzrohr (5) für Zementmörtel umfaßt, das in eine entsprechend in das Erdreich (3) ausgeführte Bohrung (20) einzusetzen ist, dadurch gekenzeichnet, daß sie eine Vielzahl von Armierungselementen (7) in Form von durchgehenden Gurten aus Fiberglas, oder Aramidfaser, oder Kohlefaser bezw. Polyvinylalkoholfaser o.ä. aufweist, die mit Hilfe von Zentrierdistanzstücken (6) um das genannte Rohr (5) montiert und möglichst von Außenbefestigungselementen (8) zusammengehalten sind, wobei keine Elemente zur Spannung der genannten Armierungselemente (7) vorgesehen sind.
  2. Vorrichtung nach Patentanspruch 1, dadurch gekennzeichnet, daß die besagten Armierungselemente (7) eine Außenoberfläche haben, die mit einer Quarzsandverkleidung behandelt ist.
  3. Vorrichtung nach irgendeiner der vorherigen Patenansprüche, dadurch gekennzeichnet, daß das besagte Rohr (5) am vorderen Ende (23) geöffnet ist und einschließlich mit einer kegelförmigen Führungsventilkappe (24) ausgestattet ist.
  4. Vorrichtung nach irgendeiner der vorherigen Patentansprüche, dadurch gekennzeichnet, daß das besagte Rohr (5) ein mit einem Ventil versehenes Rohr ist, das mit Muffenventile für lokalisierte Einspritzungen ausgestattet ist.
  5. Vorrichtung nach irgendeiner der vorherigen Patentansprüche, dadurch gekennzeichnet, daß das besagte Rohr (5) aus untereinander zusammenfügbaren Elementen (31) hergestellt ist, die durch Verbindungsmuffen (31) auf Endgewinden (30), der besagten Rohrelemente, anschraubbar sind.
  6. Vorrichtung nach irgendeiner der vorherigen Patentansprüche, dadurch gekennzeichnet, daß die besagten Dichtungselemente (8) der Armierungselemente (7,7') aus Metallfacetten, aus mit Glasfasern verstärkte Klebbandverbänden und ähnliches bestehen.
EP96101053A 1995-02-09 1996-01-25 Injektionsanker für Tunnel und Gräben Expired - Lifetime EP0726383B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI950235 1995-02-09
ITMI950235A IT1275231B (it) 1995-02-09 1995-02-09 Dispositivo per l'armatura il consolidamento e la stabilizzazione del terreno particolarmente atto ad impedire frane o deformazioni del fronte di scavo in gallerie o scavi in trincea

Publications (3)

Publication Number Publication Date
EP0726383A1 EP0726383A1 (de) 1996-08-14
EP0726383B1 EP0726383B1 (de) 1998-01-21
EP0726383B2 true EP0726383B2 (de) 2002-03-20

Family

ID=11370485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101053A Expired - Lifetime EP0726383B2 (de) 1995-02-09 1996-01-25 Injektionsanker für Tunnel und Gräben

Country Status (4)

Country Link
EP (1) EP0726383B2 (de)
AT (1) ATE162593T1 (de)
DE (1) DE69600147T3 (de)
IT (1) IT1275231B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29805352U1 (de) * 1998-03-25 1998-06-10 Habe, Wolfgang, 41844 Wegberg Vorrichtung zum Stabilisieren eines Wandkörpers
KR100715237B1 (ko) 2003-10-10 2007-05-10 정성필 네일링장치
CN102155234B (zh) * 2011-04-08 2012-12-26 中铁上海设计院集团有限公司 非对称的小间距隧道开挖施工方法
PL2976466T3 (pl) 2013-03-20 2018-06-29 Lipsker & Co. Engineering Services (1975) Ltd. System i sposób kotwienia w gruncie
ITMI20131116A1 (it) 2013-07-03 2015-01-04 Sireg S P A Tubo valvolato a manchette in bioplastica biodegradabile
JP6263979B2 (ja) * 2013-11-18 2018-01-24 株式会社大林組 地山補強材および地山補強構造
CN113047864A (zh) * 2021-01-22 2021-06-29 上海应用技术大学 一种深部厚松软围岩巷道环融支护方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2041526C3 (de) * 1970-08-21 1980-06-04 Dyckerhoff & Widmann Ag, 8000 Muenchen Zugglied für einen Verpreßanker
FR2423591A1 (fr) * 1978-04-18 1979-11-16 Sif Entreprise Bachy Ameliorations a la realisation de tirants ancres
FR2467532A1 (fr) * 1979-10-25 1981-04-30 Tokyo Chika Koji Kk Dispositif injecteur de fluides chimiques pour l'amelioration des sols
DE3507732A1 (de) * 1985-03-05 1986-09-18 Dyckerhoff & Widmann AG, 8000 München Zugglied fuer einen felsbolzen oder dergleichen
DE3536998C1 (de) * 1985-10-17 1986-11-06 Bergwerksverband Gmbh, 4300 Essen Injektionslanze
AT392501B (de) * 1988-12-06 1991-04-25 Mayreder Kraus & Co Ing Verfahren zur erhoehung der standfestigkeit von plastischem, tonig-schluffigem gebirge
FR2643096B1 (fr) * 1989-02-14 1991-05-10 Soletanche Tirant d'ancrage
DE9004177U1 (de) * 1990-04-11 1990-06-28 Bergwerksverband Gmbh, 4300 Essen Injektionsbohranker

Also Published As

Publication number Publication date
ITMI950235A1 (it) 1996-08-09
EP0726383A1 (de) 1996-08-14
DE69600147D1 (de) 1998-02-26
DE69600147T3 (de) 2003-02-06
ATE162593T1 (de) 1998-02-15
ITMI950235A0 (it) 1995-02-09
IT1275231B (it) 1997-07-31
DE69600147T2 (de) 1998-07-02
EP0726383B1 (de) 1998-01-21

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