EP2378003A1 - Assembly for connecting a geoplastic to a stable base - Google Patents

Assembly for connecting a geoplastic to a stable base Download PDF

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Publication number
EP2378003A1
EP2378003A1 EP10009619A EP10009619A EP2378003A1 EP 2378003 A1 EP2378003 A1 EP 2378003A1 EP 10009619 A EP10009619 A EP 10009619A EP 10009619 A EP10009619 A EP 10009619A EP 2378003 A1 EP2378003 A1 EP 2378003A1
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EP
European Patent Office
Prior art keywords
connecting rod
arrangement according
longitudinal
anchor
longitudinal section
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Granted
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EP10009619A
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German (de)
French (fr)
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EP2378003B1 (en
Inventor
Michael Glassl
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Dywidag Systems International GmbH
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Dywidag Systems International GmbH
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Publication of EP2378003A1 publication Critical patent/EP2378003A1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
    • E02D29/0241—Retaining or protecting walls comprising retention means in the backfill the retention means being reinforced earth elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E02D17/202—Securing of slopes or inclines with flexible securing means
    • 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
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material

Definitions

  • the invention relates to an arrangement for connecting a geosynthetic material to a load-bearing substrate according to the preamble of patent claim 1.
  • geosynthetics especially geotextiles and geogrids. These are installed over a large area in layers into the ground and showered with layers of earth. Geosynthetics act as a reinforcement, which is why this construction method is also referred to as "reinforced soil". In this context, it is already known to combine geosynthetics with soil nails to increase the stability of the substrate in addition.
  • a special case is the stabilization of soil layers, in which the substrate to be protected is bounded on one side by stable ground such as a wall or rock.
  • a horizontally oriented earth pressure develops over the height of the ground to be secured, which can be the cause of undesired movements of the ground.
  • the object of the invention is to provide a non-positive connection of a geosynthetic material to a ground nail, in which little or no movement of the ground to be secured occur.
  • the geosynthetic material is intended to be anchored not only at points, but also along one or more fastening lines. Deformations of the geosynthetics occur in this type of attachment against a punctiform attachment to a much lesser extent, which reduces as a result movements in the ground or completely prevented. The risk of unstable soil layers is thereby significantly reduced.
  • a connecting rod is provided, which runs plane-parallel to the ground along a predetermined fastening line and is anchored in the stable ground by means of anchor rods. In this way, a possibility is created to fix the geosynthetics along the connecting rod, wherein a line-shaped attachment of the geosynthetic preferably results along the edge region of the geosynthetic. A horizontal shift of geosynthetics to a significant extent is no longer possible.
  • the connecting rod to the substrate causing anchor rod is provided with its reaching out from the background second longitudinal section with a turnbuckle.
  • the turnbuckle makes it possible to change the position of the connecting rod in the longitudinal direction of the anchor rod.
  • the turnbuckle By screwing together the turnbuckle, for example, the length of the anchor rod can be shortened overall and thus the geosynthetics can be stretched over its entire surface counter to the expected ground movement. In this way, any slip of geosynthetics in the area of the attachment is eliminated, further reducing the risk of soil instability.
  • receptacles are provided at the ends of the threaded rods, which are preferably formed by a screwed or welded eyelet with transverse bore.
  • the internal thread of the screwed eyelet allows easy screwing on the free end of an anchor rod.
  • the transverse bore serves to frictionally hold the connecting rod by passing it through, whereby the connecting rod advantageously extends over a plurality of receptacles of different anchor points.
  • the connecting rod by means of tension straps at the free ends of the anchor rods, preferably on recordings of Anchor rods to attach.
  • tension straps By shortening the tension straps, the slip from the geosynthetics can also be eliminated.
  • Such an embodiment of the invention is ideally complemented with integrated in the anchor rod turnbuckles or straps, as a result of this type of attachment resulting low slip can be compensated by the turnbuckles or straps.
  • the connecting rod has a thread on its outer circumference in order in this way, with the aid of threaded sleeves, to enable a virtually endless line-shaped connection of the geosynthetic material to the supporting substrate.
  • Fig. 1 One first sees in a schematic representation the ground, which consists of a stable mountain 1 and a previously artificially produced landfill 2, which is built up of layers 3 densified in layers.
  • the landfill 2 points to the the steady rock 1 side facing away from an embankment 4, the slope angle is steeper in the present example than the inner friction angle of the material used for the landfill 2. This results in a tendency for instability of the slope 4, which is counteracted by laying a geogrid 5 on top of the previously introduced layer 3.
  • the landfill 2 is thus interspersed by horizontally extending geogrids 5, which lie in a plurality of vertically spaced planes plane-parallel one above the other, which is also referred to in the jargon as "reinforced soil".
  • the horizontal leg 7 is non-positively connected to the geogrid 5 and the upright leg 8 stabilizes the slope 4.
  • the ground nails 9 essentially consist of an anchor rod which extends with its first longitudinal section 10 into a borehole 11.
  • the cavity between the borehole wall and the first longitudinal section 10 is filled with a mortar 12, which forms after hardening a composite body, which transmits the forces acting on the bottom nail 9 forces to the stable mountains 1.
  • the air-side end of the borehole 11 is closed by a dome plate 13, through which the bottom nail 9 extends with its second longitudinal section 14 lying outside the borehole 11.
  • a seated on the second longitudinal section 14 ball collar nut 15 biases the dome plate 13 against the mountains 1, wherein an angle compensation is made possible by a complementary shape of dome and ball nut.
  • the second longitudinal section 14 of the bottom nail 9 is divided into two, wherein the separate end portion 16 is connected via a turnbuckle 17 in alignment with the rest of the anchor rod.
  • the turnbuckle 17 makes it possible to adjust the axial distance between the end portion 16 and the rest of the tie rod.
  • a screwed eyelet 18 is applied to the end portion 16.
  • the eyelet 18 has an axial bore with internal thread, which is in engagement with the external thread of the bottom nail 9.
  • a transverse bore 19 is introduced into the eyelet 18, which forms a receptacle for a connecting rod 20 which can be inserted therein.
  • a ground nail 9 forms, together with the connecting rod 20, an arrangement for connecting the geogrid 5 to the stable rock 1, which will be discussed in more detail below.
  • Fig. 2 shows the non-positive connection of the geogrid 5 to the bottom nails 9.
  • the geogrid 5 is folded around the held in the screwed or welded eyelets 18 connecting rod 20.
  • the envelope 21 is deposited on the remaining geogrid 5, in such a way that along the connecting rod 20, the meshes formed by the longitudinal webs 22 and transverse webs 23 of the envelope 21 and the rest of the geogrid 5 lie approximately congruently one above the other.
  • the longitudinal webs 22 are guided through the mesh openings, wherein the longitudinal webs 22 of the envelope 21 intersect with those of the remaining geogrid 5 twice and form loops in this way.
  • a connecting rod 20 in approximately parallel rod-shaped latch 24 is inserted, which causes the locking of the geogrid 5 on the connecting rod 20.
  • the axial length of the bottom nail 9 can advantageously be shortened with the aid of the turnbuckles 17 and thus the geogrid 5 can be tensioned so that a possible slippage from the system is eliminated.
  • the connecting rod is secured by means of one or more straps on the anchor rod.
  • the tension belt can be guided around the connecting rod and connects, for example, to the seated on the free end of the second longitudinal section of the anchor rod recording. By tensioning the tensioning belt he is tensioned connecting rod in the direction of the anchor rods and with him the geogrid or the geosynthetic.

Abstract

The arrangement has two ground nails (9) forming anchor rods, which are fixed in the stable substrate with a longitudinal section (10). A connecting rod (20) runs perpendicular to the longitudinal axis of the anchor rods. The geoplastic is attached on the connecting rod and over the length of the connecting rod in a force-fit manner.

Description

Die Erfindung betrifft eine Anordnung zum Anschluss eines Geokunststoffs an einen tragfähigen Untergrund gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an arrangement for connecting a geosynthetic material to a load-bearing substrate according to the preamble of patent claim 1.

Zur Stabilisierung eines böschungs- oder grundbruchgefährdeten Untergrunds ist der Einsatz von Geokunststoffen, insbesondere Geotextilien und Geogitter seit langem bekannt. Diese werden großflächig lagenweise in den Untergrund eingebaut und mit Erdschichten überschüttet. Geokunststoffe wirken dabei wie eine Bewehrung, weshalb diese Konstruktionsweise auch als "bewehrte Erde" bezeichnet wird. In diesem Zusammenhang ist es auch schon bekannt, Geokunststoffe mit Bodennägeln zu kombinieren, um die Standfestigkeit des Untergrunds zusätzlich zu erhöhen.To stabilize a bedrock or groundbreaking surface, the use of geosynthetics, especially geotextiles and geogrids has long been known. These are installed over a large area in layers into the ground and showered with layers of earth. Geosynthetics act as a reinforcement, which is why this construction method is also referred to as "reinforced soil". In this context, it is already known to combine geosynthetics with soil nails to increase the stability of the substrate in addition.

Ein Sonderfall stellt die Stabilisierung von Bodenschichten dar, bei der der zu sichernde Untergrund einseitig von standfestem Untergrund wie zum Beispiel einer Wand oder Fels begrenzt wird. Dabei entwickelt sich über die Höhe des zu sichernden Untergrunds ein horizontal gerichteter Erddruck, der Ursache für unerwünschte Bewegungen des Untergrunds sein kann.A special case is the stabilization of soil layers, in which the substrate to be protected is bounded on one side by stable ground such as a wall or rock. In this case, a horizontally oriented earth pressure develops over the height of the ground to be secured, which can be the cause of undesired movements of the ground.

Um Geokunststoffe im standfesten Untergrund zu verankern, sind auch schon Bodennägel und Geokunststoffe kombiniert worden. Dabei stellt sich der Anschluss des Geokunststoffes an den Bodennagel als kritisch heraus. Erlaubt die Art der Befestigung einen zu großen Schlupf zwischen Bodennagel und Geokunststoff, dann sind bis zur Aktivierung der Verankerungskraft Bewegungen der gefährdeten Erdschichten möglich. Bei Überschreiten der vom Untergrund aufnehmbaren Scherkräfte bilden sich in der Folge Gleitfugen zwischen den unterschiedlichen Erdschichten aus, die einer späteren Instabilität Vorschub leisten.Ground anchors and geosynthetics have already been combined to anchor geosynthetics in stable ground. The connection of the geosynthetic material to the soil nail turns out to be critical. If the method of attachment allows too much slippage between soil nail and geosynthetic material, movements of the endangered earth layers are possible until the anchoring force is activated. If the shear forces that can be absorbed by the substrate are exceeded, slip joints between the different earth layers are formed as a result, which contribute to a later instability.

Vor diesem Hintergrund besteht die Aufgabe der Erfindung darin, einen kraftschlüssigen Anschluss eines Geokunststoffs an einen Bodennagel bereit zu stellen, bei dem nur geringe oder keine Bewegungen des zu sichernden Untergrunds auftreten.Against this background, the object of the invention is to provide a non-positive connection of a geosynthetic material to a ground nail, in which little or no movement of the ground to be secured occur.

Diese Aufgabe wird durch eine Anordnung mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved by an arrangement having the features of patent claim 1.

Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.Advantageous developments emerge from the subclaims.

Gemäß der Erfindung ist vorgesehen den Geokunststoff nicht nur punktuell, sondern entlang einer oder mehrerer Befestigungslinien zu verankern. Verformungen des Geokunststoffes treten bei dieser Befestigungsart gegenüber einer punktuellen Befestigung in wesentlich geringerem Maße auf, was in der Folge Bewegungen im Untergrund reduziert oder ganz verhindert. Die Gefahr instabiler Bodenschichten wird dadurch erheblich verringert. Zur Umsetzung dieses Erfindungsgedankens ist ein Anschlussstab vorgesehen, der planparallel zum Untergrund entlang einer vorbestimmten Befestigungslinie verläuft und in dem standfesten Untergrund mit Hilfe von Ankerstäben verankert ist. Auf diese Weise wird eine Möglichkeit geschaffen, den Geokunststoff entlang des Anschlussstabes zu fixieren, wobei sich eine linienförmige Befestigung des Geokunststoffes vorzugsweise entlang des Randbereichs des Geokunststoffes ergibt. Eine horizontale Verschiebung des Geokunststoffes in nennenswertem Umfang ist dadurch nicht mehr möglich.According to the invention, the geosynthetic material is intended to be anchored not only at points, but also along one or more fastening lines. Deformations of the geosynthetics occur in this type of attachment against a punctiform attachment to a much lesser extent, which reduces as a result movements in the ground or completely prevented. The risk of unstable soil layers is thereby significantly reduced. To implement this inventive concept, a connecting rod is provided, which runs plane-parallel to the ground along a predetermined fastening line and is anchored in the stable ground by means of anchor rods. In this way, a possibility is created to fix the geosynthetics along the connecting rod, wherein a line-shaped attachment of the geosynthetic preferably results along the edge region of the geosynthetic. A horizontal shift of geosynthetics to a significant extent is no longer possible.

In bevorzugter Weiterbildung der Erfindung ist der den Anschluss an den Untergrund bewirkende Ankerstab mit seinem aus dem Untergrund herausreichenden zweiten Längsabschnitt mit einem Spannschloss versehen. Das Spannschloss ermöglicht es, die Lage des Anschlussstabs in Längsrichtung des Ankerstabs verändern zu können. Durch Zusammenschrauben des Spannschlosses kann beispielsweise die Länge des Ankerstabs insgesamt verkürzt und damit der Geokunststoff über seine gesamte Fläche entgegen der erwarteten Bodenbewegung gespannt werden. Auf diese Weise wird jeglicher Schlupf des Geokunststoffs im Bereich der Befestigung eliminiert und damit das Risiko einer Bodeninstabilität weiter reduziert.In a preferred embodiment of the invention, the connecting rod to the substrate causing anchor rod is provided with its reaching out from the background second longitudinal section with a turnbuckle. The turnbuckle makes it possible to change the position of the connecting rod in the longitudinal direction of the anchor rod. By screwing together the turnbuckle, for example, the length of the anchor rod can be shortened overall and thus the geosynthetics can be stretched over its entire surface counter to the expected ground movement. In this way, any slip of geosynthetics in the area of the attachment is eliminated, further reducing the risk of soil instability.

Im Sinne einer einfach handzuhabenden, aber gleichzeitig wirkungsvollen und wirtschaftlichen Lagerung des Anschlussstabs an den Gewindestäben, sind an den Enden der Gewindestäbe Aufnahmen vorgesehen, die vorzugsweise von einer aufgeschraubten oder angeschweißten Öse mit Querbohrung gebildet werden. Das Innengewinde der aufgeschraubten Öse ermöglicht ein einfaches Aufschrauben auf das freie Ende eines Ankerstabs. Die Querbohrung dient dazu, den Anschlussstab durch Hindurchführung desselben kraftschlüssig zu halten, wobei der Anschlussstab sich vorteilhafterweise über mehrere Aufnahmen unterschiedlicher Ankerstellen hinweg erstreckt. So kann die Verankerung des Geokunststoffs allein durch Schrauben und Stecken hergestellt werden, ohne den Einsatz zusätzlicher Werkzeuge und Ausrüstung.In terms of a simple to handle, but at the same time effective and economical storage of the connecting rod to the threaded rods, receptacles are provided at the ends of the threaded rods, which are preferably formed by a screwed or welded eyelet with transverse bore. The internal thread of the screwed eyelet allows easy screwing on the free end of an anchor rod. The transverse bore serves to frictionally hold the connecting rod by passing it through, whereby the connecting rod advantageously extends over a plurality of receptacles of different anchor points. Thus, the anchoring of the geosynthetic can be made solely by screwing and plugging, without the use of additional tools and equipment.

Gemäß einer alternativen Ausführungsform der Erfindung ist vorgesehen, den Anschlussstab mittels Spanngurten an den freien Enden der Ankerstäbe, vorzugsweise an Aufnahmen der Ankerstäbe, zu befestigen. Durch Verkürzen der Spanngurte kann ebenfalls der Schlupf aus dem Geokunststoff eliminiert werden.According to an alternative embodiment of the invention, the connecting rod by means of tension straps at the free ends of the anchor rods, preferably on recordings of Anchor rods to attach. By shortening the tension straps, the slip from the geosynthetics can also be eliminated.

Zur Erreichung einer linienförmigen Befestigung des Geokunststoff am Anschlussstab erweist es sich als besonders vorteilhaft, den Geokunststoff um den Anschlussstab umzuschlagen und im Überlappungsbereich mit dem übrigen Geokunststoff zu verbinden. In Verbindung mit einem Geogitter als Geokunststoff zeigt sich hierbei eine Verbindungsart als besonders wirkungsvoll und gleichzeitig einfach, bei der die Längsstege des umgeschlagenen Geogitters die Gitterstruktur des übrigen Geogitters durchdringen und auf diese Weise Schlaufen gebildet werden, durch welche stabförmige Riegelelemente gesteckt werden.To achieve a linear attachment of geosynthetics on the connecting rod, it proves to be particularly advantageous to turn the geosynthetics around the connecting rod and connect in the overlap area with the rest of geosynthetics. In conjunction with a geogrid as geosynthetics this shows a connection as particularly effective and at the same time easy, in which the longitudinal webs of the folded geogrid penetrate the grid structure of the rest of the geogrid and in this way loops are formed through which rod-shaped locking elements are inserted.

Eine solche Ausführungsform der Erfindung ergänzt sich in idealer Weise mit in den Ankerstab integrierten Spannschlössern oder Spanngurten, da ein durch diese Art der Befestigung sich ergebender geringer Schlupf durch die Spannschlösser oder Spanngurte kompensiert werden kann.Such an embodiment of the invention is ideally complemented with integrated in the anchor rod turnbuckles or straps, as a result of this type of attachment resulting low slip can be compensated by the turnbuckles or straps.

Gemäß einer bevorzugten Ausführungsform der Erfindung besitzt der Anschlussstab an seinem Außenumfang ein Gewinde, um auf diese Weise mit Hilfe von Schraubmuffen einen quasi endlosen linienförmigen Anschluss des Geokunststoffes an den tragfähigen Untergrund zu ermöglichen.According to a preferred embodiment of the invention, the connecting rod has a thread on its outer circumference in order in this way, with the aid of threaded sleeves, to enable a virtually endless line-shaped connection of the geosynthetic material to the supporting substrate.

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

Fig. 1
eine Schrägansicht einer erfindungsgemäßen Anordnung während der Herstellung einer Böschung,
Fig. 2
einen Vertikalschnitt durch die in Fig. 1 dargestellte Anordnung und
Fig. 3
eine Schrägansicht auf einen erfindungsgemäßem Bodennagel, jedoch ohne Darstellung des Geogitters.
The invention will be explained in more detail with reference to an embodiment shown in the drawing. It shows
Fig. 1
an oblique view of an inventive arrangement during the production of a slope,
Fig. 2
a vertical section through the in Fig. 1 illustrated arrangement and
Fig. 3
an oblique view of a ground nail according to the invention, but without representation of the geogrid.

In Fig. 1 sieht man zunächst in schematischer Darstellung den Untergrund, der aus einem standfesten Gebirge 1 und einer davor künstlich hergestellten Aufschüttung 2 besteht, die aus lagenweise verdichteten Schichten 3 aufgebaut wird. Die Aufschüttung 2 weist auf der dem standfesten Gebirge 1 abgewandten Seite eine Böschung 4 auf, deren Böschungswinkel im vorliegenden Beispiel steiler ist als der innere Reibungswinkel des für die Aufschüttung 2 verwendeten Materials. Daraus resultiert eine Tendenz zur Instabilität der Böschung 4, der durch Verlegen eines Geogitters 5 auf der Oberseite der zuvor eingebrachten Schicht 3 entgegengewirkt wird. Im fertigen Zustand ist die Aufschüttung 2 also von horizontal verlaufenden Geogittern 5 durchsetzt, die in mehreren vertikal beabstandeten Ebenen planparallel übereinander liegen, was in der Fachsprache auch als "bewehrte Erde" bezeichnet wird. Zur Böschung 4 hin bildet ein winkelförmiges Stahlgitterelement 6 den Abschluss, dessen horizontaler Schenkel 7 kraftschlüssig mit dem Geogitter 5 verbunden ist und dessen aufrechter Schenkel 8 die Böschung 4 stabilisiert.In Fig. 1 One first sees in a schematic representation the ground, which consists of a stable mountain 1 and a previously artificially produced landfill 2, which is built up of layers 3 densified in layers. The landfill 2 points to the the steady rock 1 side facing away from an embankment 4, the slope angle is steeper in the present example than the inner friction angle of the material used for the landfill 2. This results in a tendency for instability of the slope 4, which is counteracted by laying a geogrid 5 on top of the previously introduced layer 3. In the finished state, the landfill 2 is thus interspersed by horizontally extending geogrids 5, which lie in a plurality of vertically spaced planes plane-parallel one above the other, which is also referred to in the jargon as "reinforced soil". For embankment 4 through an angle-shaped steel grid element 6 forms the conclusion, the horizontal leg 7 is non-positively connected to the geogrid 5 and the upright leg 8 stabilizes the slope 4.

Zur Lagesicherung des Geogitters 5 ist dieses mit Hilfe von Bodennägeln 9 im standfesten Gebirge 1 verankert. Zu diesem Zweck sind mehrere Bodennägel 9 auf gleicher Höhe und in seitlichem Abstand innerhalb von Bohrlöchern 11 angeordnet, wobei die Längsachse der Bodennägel 9 in Richtung der erwarteten Bodenbewegung verläuft oder zumindest eine richtungsparallele Komponente dazu besitzt, was heißen soll, dass die Bodennägel nicht senkrecht zur erwarteten Bewegungsrichtung orientiert sind. Wie vor allem aus den Figuren 2 und 3 ersichtlich, bestehen die Bodennägel 9 im Wesentlichen aus einem Ankerstab, der sich mit seinem ersten Längsabschnitt 10 in ein Bohrloch 11 erstreckt. Der Hohlraum zwischen der Bohrlochwandung und dem ersten Längsabschnitt 10 ist mit einem Mörtel 12 aufgefüllt, der nach Erhärten einen Verbundkörper bildet, der die auf den Bodennagel 9 einwirkenden Kräfte an das standfeste Gebirge 1 überträgt.To secure the geogrid 5 this is anchored with the help of soil nails 9 in stable mountains 1. For this purpose, a plurality of soil nails 9 are arranged at the same height and laterally within boreholes 11, wherein the longitudinal axis of the soil nails 9 in the direction of the expected ground movement or at least has a directionally parallel component, which means that the soil nails not perpendicular to expected direction of movement are oriented. Especially from the Figures 2 and 3 As can be seen, the ground nails 9 essentially consist of an anchor rod which extends with its first longitudinal section 10 into a borehole 11. The cavity between the borehole wall and the first longitudinal section 10 is filled with a mortar 12, which forms after hardening a composite body, which transmits the forces acting on the bottom nail 9 forces to the stable mountains 1.

Das luftseitige Ende des Bohrlochs 11 ist von einer Kalottenplatte 13 verschlossen, durch welche sich der Bodennagel 9 mit seinem außerhalb des Bohrlochs 11 liegenden zweiten Längsabschnitt 14 erstreckt. Eine auf dem zweiten Längsabschnitt 14 sitzende Kugelbundmutter 15 spannt die Kalottenplatte 13 gegen das Gebirge 1, wobei durch eine komplementäre Formgebung von Kalotte und Kugelbundmutter ein Winkelausgleich ermöglicht wird.The air-side end of the borehole 11 is closed by a dome plate 13, through which the bottom nail 9 extends with its second longitudinal section 14 lying outside the borehole 11. A seated on the second longitudinal section 14 ball collar nut 15 biases the dome plate 13 against the mountains 1, wherein an angle compensation is made possible by a complementary shape of dome and ball nut.

Der zweite Längsabschnitt 14 des Bodennagels 9 ist zweigeteilt, wobei der getrennte Endabschnitt 16 über ein Spannschloss 17 mit dem übrigen Ankerstab fluchtend verbunden ist. Das Spannschloss 17 erlaubt es, den axialen Abstand zwischen dem Endabschnitt 16 und übrigem Ankerstab einstellen zu können.The second longitudinal section 14 of the bottom nail 9 is divided into two, wherein the separate end portion 16 is connected via a turnbuckle 17 in alignment with the rest of the anchor rod. The turnbuckle 17 makes it possible to adjust the axial distance between the end portion 16 and the rest of the tie rod.

Wie die Fig. 2 und 3 zeigen, ist auf den Endabschnitt 16 eine aufgeschraubte Öse 18 aufgebracht. Zu diesem Zweck weist die Öse 18 eine axiale Bohrung mit Innengewinde auf, die mit dem Außengewinde des Bodennagels 9 in Eingriff steht. Alternativ wäre es auch möglich, die Öse 18 an den Ankerstab anzuschweißen. Im Kopfbereich ist in die Öse 18 eine Querbohrung 19 eingebracht, die eine Aufnahme für einen darin einsteckbaren Anschlussstab 20 bildet. Ein solcher Bodennagel 9 bildet zusammen mit dem Anschlussstab 20 eine Anordnung zum Anschluss des Geogitters 5 an das standfeste Gebirge 1, worauf im Folgenden näher eingegangen wird.As the Fig. 2 and 3 show, a screwed eyelet 18 is applied to the end portion 16. For this purpose, the eyelet 18 has an axial bore with internal thread, which is in engagement with the external thread of the bottom nail 9. Alternatively, it would also be possible to weld the eyelet 18 to the anchor rod. In the head area, a transverse bore 19 is introduced into the eyelet 18, which forms a receptacle for a connecting rod 20 which can be inserted therein. Such a ground nail 9 forms, together with the connecting rod 20, an arrangement for connecting the geogrid 5 to the stable rock 1, which will be discussed in more detail below.

Insbesondere Fig. 2 zeigt den kraftschlüssigen Anschluss des Geogitters 5 an die Bodennägel 9. Dazu ist das Geogitter 5 um den in den aufgeschraubten oder angeschweißten Ösen 18 gehaltenen Anschlussstab 20 umgeschlagen. Der Umschlag 21 ist auf dem übrigen Geogitter 5 abgelegt, und zwar derart, dass entlang des Anschlussstabs 20 die von den Längsstegen 22 und Querstegen 23 gebildeten Maschen des Umschlags 21 und dem übrigen Geogitter 5 in etwa deckungsgleich übereinander liegen.Especially Fig. 2 shows the non-positive connection of the geogrid 5 to the bottom nails 9. For this purpose, the geogrid 5 is folded around the held in the screwed or welded eyelets 18 connecting rod 20. The envelope 21 is deposited on the remaining geogrid 5, in such a way that along the connecting rod 20, the meshes formed by the longitudinal webs 22 and transverse webs 23 of the envelope 21 and the rest of the geogrid 5 lie approximately congruently one above the other.

Zum Verbinden des Umschlags 21 mit dem übrigen Geogitter 5 sind die Längsstege 22 durch die Maschenöffnungen geführt, wobei sich die Längsstege 22 des Umschlags 21 mit denen des übrigen Geogitters 5 zweimal kreuzen und auf diese Weise Schlaufen bilden. Durch die Schlaufen ist ein zum Anschlussstab 20 in etwa parallel verlaufender stabförmiger Riegel 24 gesteckt, der die Verriegelung des Geogitters 5 am Anschlussstab 20 bewirkt.To connect the envelope 21 with the rest of the geogrid 5, the longitudinal webs 22 are guided through the mesh openings, wherein the longitudinal webs 22 of the envelope 21 intersect with those of the remaining geogrid 5 twice and form loops in this way. Through the loops, a connecting rod 20 in approximately parallel rod-shaped latch 24 is inserted, which causes the locking of the geogrid 5 on the connecting rod 20.

Da diese Art des Anschlusses des Geogitters 5 an die Bodennägel 9 noch mit einem gewissen Schlupf behaftet ist, kann vorteilhafterweise mit Hilfe der Spannschlösser 17 die axiale Länge des Bodennagels 9 verkürzt und damit das Geogitter 5 gespannt werden, so dass ein möglicher Schlupf aus dem System eliminiert wird.Since this type of connection of the geogrid 5 to the bottom nails 9 is still subject to a certain amount of slippage, the axial length of the bottom nail 9 can advantageously be shortened with the aid of the turnbuckles 17 and thus the geogrid 5 can be tensioned so that a possible slippage from the system is eliminated.

In den Zeichnungen nicht dargestellt ist eine Ausführungsform der Erfindung, bei der der Anschlussstab mittels eines oder mehrerer Spanngurte am Ankerstab befestigt ist. Der Spanngurt kann dabei um den Anschlussstab geführt sein und schließt beispielsweise an die auf dem freien Ende des zweiten Längsabschnitts des Ankerstabs sitzende Aufnahme an. Durch Spannen des Spanngurts wird er Anschlussstab in Richtung der Ankerstäbe gespannt und mit ihm das Geogitter oder der Geokunststoff.Not shown in the drawings is an embodiment of the invention, wherein the connecting rod is secured by means of one or more straps on the anchor rod. The tension belt can be guided around the connecting rod and connects, for example, to the seated on the free end of the second longitudinal section of the anchor rod recording. By tensioning the tensioning belt he is tensioned connecting rod in the direction of the anchor rods and with him the geogrid or the geosynthetic.

Claims (9)

Anordnung zum Anschluss eines Geokunststoffs (5) an einen tragfähigen Untergrund (1) mit mindestens zwei jeweils Bodennägel (9) bildenden Ankerstäben, die jeweils mit einem ersten Längsabschnitt (10) im tragfähigen Untergrund (1) verankert sind und mit einem zweiten Längsabschnitt (14) aus dem tragfähigen Untergrund (1) herausreichen, wobei der Geokunststoff (5) kraftschlüssig im Bereich des zweiten Längsabschnitts (14) an die mindestens zwei Ankerstäbe anschließt, gekennzeichnet durch einen quer zur Längsachse der Ankerstäbe verlaufenden Anschlussstab (20), an dem und über dessen Länge der Geokunststoff (5) kraftschlüssig angeschlossen ist, wobei Mittel zur Befestigung des Anschlussstabs (20) jeweils an dem freien Ende des zweiten Längsabschnitts (14) der Ankerstäbe vorgesehen sind.Arrangement for connecting a geosynthetic material (5) to a load-bearing base (1) having at least two anchor rods forming respective bottom nails (9), each anchored to a first longitudinal section (10) in the load-bearing base (1) and having a second longitudinal section (14 ), the geosynthetic material (5) frictionally in the region of the second longitudinal section (14) connects to the at least two anchor rods, characterized by a transverse to the longitudinal axis of the anchor rods connecting rod (20), on and over the length of the geosynthetic material (5) is non-positively connected, wherein means for fastening the connecting rod (20) respectively at the free end of the second longitudinal portion (14) of the anchor rods are provided. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel jeweils eine Aufnahme umfassen, an welcher der Anschlussstab fixiert ist und welche jeweils mit dem freien Ende des zweiten Längsabschnitts (14) der Ankerstäbe verbunden ist.Arrangement according to claim 1, characterized in that the means each comprise a receptacle on which the connecting rod is fixed and which in each case with the free end of the second longitudinal portion (14) of the anchor rods is connected. Anordnung nach Anspruch 2, dadurch gekennzeichnet, dass die Aufnahme am Ende der Gewindestäbe aus einer aufgeschraubten oder angeschweißten Öse (18) mit Querbohrung (19) besteht, durch welche sich der Anschlussstab (20) erstreckt.Arrangement according to claim 2, characterized in that the receptacle at the end of the threaded rods consists of a screwed or welded eyelet (18) with transverse bore (19) through which extends the connecting rod (20). Anordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Mittel zusätzlich ein Spannschloss (17) umfassen, das zwischen Aufnahme und zweitem Längsabschnitt (14) zwischengeschaltet ist.Arrangement according to one of claims 1 to 3, characterized in that the means additionally comprise a turnbuckle (17) which is interposed between the receptacle and the second longitudinal section (14). Anordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Mittel mindestens ein Spannelement, vorzugsweise einen Spanngurt, umfassen, der sich vom zweiten Längsabschnitt (14) des Ankerstabs bzw. von dessen Aufnahme zum Anschlussstab (20) erstreckt.Arrangement according to one of Claims 1 to 4, characterized in that the means comprise at least one tensioning element, preferably a tensioning belt, which extends from the second longitudinal section (14) of the anchor rod or from its receptacle to the connecting rod (20). Anordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Geokunststoff (5) zur Befestigung an dem Anschlussstab (20) um den Anschlussstab (20) umgeschlagen und der Umschlag (21) mit dem übrigen Geokunststoff (5) Verbindungsstellen ausbildet.Arrangement according to one of claims 1 to 5, characterized in that the geosynthetic material (5) for attachment to the connecting rod (20) to the connecting rod (20) turned over and the envelope (21) with the remaining geosynthetic material (5) forms connecting points. Anordnung nach Anspruch 6, dadurch gekennzeichnet, dass der Geokunststoff aus einem Geogitter (5) besteht mit einer von Längsstegen (22) und Querstegen (23) gebildeten Gitterstruktur, wobei die Verbindungsstellen hergestellt sind, indem die Längsstege (22) des Umschlags (21) und des übrigen Geogitters (5) im Bereich zwischen zwei benachbarten Querstegen (23) zur Bildung einer Schlaufe doppelt über Kreuz geführt sind und ein stabförmiger Riegel (24) durch die Schlaufen gesteckt ist.Arrangement according to claim 6, characterized in that the geosynthetics consists of a geogrid (5) with a lattice structure formed by longitudinal webs (22) and transverse webs (23), wherein the connecting points are made by the longitudinal webs (22) of the envelope (21) and the remaining geogrid (5) in the region between two adjacent transverse webs (23) to form a loop are crossed over twice and a cross-shaped bar (24) is inserted through the loops. Anordnung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Anschlussstab (20) und/oder der Ankerstab an seinem Außenumfang Rippen oder ein Gewinde besitzt.Arrangement according to one of claims 1 to 7, characterized in that the connecting rod (20) and / or the anchor rod has ribs or a thread on its outer circumference. Anordnung nach Anspruch 8, dadurch gekennzeichnet, dass mindestens zwei Anschlussstäbe (20) mittels Muffen stumpf gestoßen sind.Arrangement according to claim 8, characterized in that at least two connecting rods (20) are stumped by means of sleeves.
EP10009619.7A 2010-04-19 2010-09-15 Assembly for connecting a geoplastic to a stable base Not-in-force EP2378003B1 (en)

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Application Number Priority Date Filing Date Title
DE201020005858 DE202010005858U1 (en) 2010-04-19 2010-04-19 Arrangement for connecting a geosynthetic material to a load-bearing substrate

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EP2378003B1 EP2378003B1 (en) 2015-06-24

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
ITUA20162302A1 (en) * 2016-04-05 2017-10-05 Lega Rocciatori S R L Ground anchoring medium in a consolidation system of the cortical layer of landslide
CN113668542A (en) * 2021-09-26 2021-11-19 中水北方勘测设计研究有限责任公司 Anti-cracking construction method for concrete dam overwintering interlayer in severe cold region

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WO2004018779A2 (en) * 2002-08-21 2004-03-04 Allan Block Corporation Reinforcing system for stackable retaining wall units
FR2913035A1 (en) * 2007-02-23 2008-08-29 Terre Armee Internationale Soc Built structure for use with pre-existing wall, has maintaining unit with free end portion extending in filling, where forces are transmitted between free end portion and filling material for contributing to tension of connecting portion
US7645098B1 (en) * 2008-12-18 2010-01-12 Earth Reinforcement Technologies, Llc Modular retaining wall block with enhanced stacking ability

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Publication number Priority date Publication date Assignee Title
WO2004018779A2 (en) * 2002-08-21 2004-03-04 Allan Block Corporation Reinforcing system for stackable retaining wall units
FR2913035A1 (en) * 2007-02-23 2008-08-29 Terre Armee Internationale Soc Built structure for use with pre-existing wall, has maintaining unit with free end portion extending in filling, where forces are transmitted between free end portion and filling material for contributing to tension of connecting portion
US7645098B1 (en) * 2008-12-18 2010-01-12 Earth Reinforcement Technologies, Llc Modular retaining wall block with enhanced stacking ability

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20162302A1 (en) * 2016-04-05 2017-10-05 Lega Rocciatori S R L Ground anchoring medium in a consolidation system of the cortical layer of landslide
CN113668542A (en) * 2021-09-26 2021-11-19 中水北方勘测设计研究有限责任公司 Anti-cracking construction method for concrete dam overwintering interlayer in severe cold region

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EP2378003B1 (en) 2015-06-24

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