ANCHOR HEAD SYSTEM

Description

Technical field of the invention

[0001] The invention relates to an anchor head system for securing slopes and / or terrain discontinuities as well as for securing excavation pits. In particular, the anchor head system according to the invention comprises system components made of a fiber-reinforced plastic and characterized by high tensile strength. State of the art

[0002] Multi-part anchor head systems are known for securing excavations and / or slopes, and especially for tunnel construction, with at least some of the system components made of fiber-reinforced plastic. An anchor head system is used to transfer earth pressure forces from an excavation wall and / or slope, or general instability in the near-surface area, into deeper, stable strata. Fiber-reinforced plastic allows for corrosion-resistant and high-tensile-strength applications of the anchor head system. However, existing anchor head systems do not yet exhibit the strength values ​​achievable with conventional steel anchor systems. Therefore, various anchor head systems have been developed to increase the load-bearing capacity and strength of such systems.

[0003] In general, anchor head systems made of fiber-reinforced plastic comprise an anchor, also known as a tension member, an anchor plate that can be attached to it, and a tensioning device, such as an anchor nut. Furthermore, systems used to secure slopes and terrain discontinuities, known as retaining walls, can include a geotextile infill in addition to the anchor head system. A retaining wall comprising components of the anchor head system and a fiber-reinforced plastic infill can be called a plastic retaining wall.

[0004] While fiber-reinforced plastic anchor rods can transmit high tensile forces, the thread formed on this tension member in the anchor head area reduces its load-bearing capacity, making it less comparable to that of conventional steel anchors. To ensure sufficient force transmission nonetheless, thread production is complex.

[0005] To increase the load-bearing capacity of plastic anchors, sleeves can be used instead of an anchor nut screwed onto a thread cut into the tension member. A sleeve with an internal cone is known, which is placed onto the end of the tension member and secured with a wedge that can be inserted into a slotted and expandable end of the tension member. For further securing, DE 29804743 U1 discloses a steel sleeve being placed onto a tension member end that can be expanded with a wedge and secured by adhesive bonding. The steel sleeve has a thread on its cylindrical outer surface, onto which a steel nut can be screwed.

[0006] Furthermore, anchor head systems are known that do not require spreading a defined end of the tension member. DE 4400644 A1 describes a rock anchor with a glass fiber reinforced plastic (GRP) anchor rod and a tensioning element with an anchor plate, as well as a fixing part attached to the anchor rod. The fixing part comprises a wedge that can be slid onto the anchor rod and has a conical shape that corresponds to a counter-cone of a tensioning sleeve also included. The wedge is displaceable in the longitudinal direction of the counter-cone via a tensioning device, which is partially housed in the tensioning sleeve and slidably mounted on the anchor rod. The wedge has a higher coefficient of friction on its inner surface in contact with the anchor rod for improved friction than on its outer surface.This described anchor head system therefore comprises a large number of elements, so that both the locking mechanism achievable with it and the coordination of the elements are complex and hinder simple and error-free use.

[0007] From DE 1020100249395 A1, a rock anchor is also known, comprising an anchor rod with a sectionally formed external thread, an anchor plate, a seat ring, and an anchor nut, each of which is made of fiber-reinforced plastic. The anchor nut has a conical area on its outer surface which engages with an inner cone of the seat ring and can be screwed onto the anchor rod. By means of a curved shape of a contact surface between the seat ring and the anchor plate, the anchor rod can be tilted at an angle to the anchor plate.

[0008] Furthermore, WO 2015 / 049395 A1 discloses an anchor system made of fiber-reinforced plastic with a tapered through-hole through which an anchor rod can be inserted. The anchor rod can be fixed in the tapered through-hole by means of several wedges.

[0009] For securing slopes, changes in elevation, and / or shallow excavations, in addition to anchor head systems, reinforcing mesh, geotextiles, and / or erosion control mats are used, which, as infill, provide effective protection against surface and near-surface instabilities. Accordingly, a flexible mesh can be laid out over the area to be secured and fastened with a number of spaced-apart, adjustable anchor head systems.

[0010] There is still a need for an improved multi-part anchor head system made exclusively of fiber-reinforced plastic, which is also suitable for use with infill as a combination of erosion fleece and geogrid in such a way that a novel retaining wall is available for securing slopes, terrain breaks and / or excavation pits. Summary of the invention

[0011] The object of the present invention is therefore to provide an anchor head system for securing slopes of any kind, terrain discontinuities and / or excavation walls against surface and / or deep-seated sliding, wherein it is easy to install, lightweight and corrosion-resistant. In particular, in combination with a planar infill, a predetermined limited terrain deformation can be tolerated by means of the anchor head system, while overall stability is maintained.

[0012] The problem is solved by an anchor head system for securing embankments and / or terrain breaks as well as for securing excavation pits according to claim 1. Advantageous embodiments and further developments of the invention result from the dependent claims.

[0013] A key feature of the inventive solution is that the anchor head system for securing slopes and / or terrain discontinuities, as well as for securing excavations, is made entirely of a fiber-reinforced plastic. Preferably, all system components are at least partially made of a glass fiber-reinforced plastic (GFRP). Fiber-reinforced plastic refers to a material that contains organic and / or inorganic fibers, such as glass fibers, carbon fibers, and / or natural fibers, embedded in a matrix of suitable plastics and / or resins, e.g., epoxy resin.

[0014] According to the inventive anchor head system, it is possible to avoid the need for individual system components and any infill material to be made of a corrosion-prone material such as steel, thus preventing an impact on service life and load-bearing capacity in a corrosive environment. Furthermore, it avoids the need to apply a layer of concrete, possibly reinforced, to secure slopes and / or terrain discontinuities, as well as to secure excavations, which has negative consequences for people and the environment. An additional advantage of the inventive solution is that no delays occur in setting up the slope or excavation support due to the curing times required for a shotcrete wall, thereby reducing the overall effort.A further advantage of the inventive solution compared to conventional anchors is that installation is independent of freezing conditions, corrosion protection is ensured in the presence of corrosive media and other influences in the subsurface and head area, and the components can be dismantled and recycled as completely as possible. In particular, the inventive anchor head system proves suitable for areas where stray currents may occur, for example, near railway lines.

[0015] Fiber-reinforced plastic anchor head systems are lightweight and therefore advantageous, as transport times to and within the construction site, as well as installation times, can be reduced due to simplified transport. To improve upon the known disadvantages of fiber-reinforced plastic anchor head systems compared to steel anchors, system components of the anchor head system according to the invention are optimized so that comparable tensile forces to those of steel anchors can be achieved.

[0016] The invention relates to an anchor head system for securing embankments and / or terrain breaks as well as for securing excavation pits, comprising: a tension member made of fiber-reinforced plastic and designed to be anchored in a borehole, an anchor plate made of fiber-reinforced plastic with an anchor hole bore through which an end region of the tension member can be passed, and clamping devices made of fiber-reinforced plastic which can be received on the tension member.

[0017] The clamping devices comprise a clamping sleeve that can be partially inserted into the anchor hole bore of the anchor plate and wedge elements that are movable in the longitudinal direction along contact surfaces at the end area of ​​the tension member in the clamping sleeve and form a wedge connection.

[0018] The tension member can also be referred to as an anchor rod and, based on its shape, as a lamella. It is made of fiber-reinforced plastic, particularly glass fiber-reinforced plastic. A thermoset plastic can be used, which is reinforced specifically with fibers, or glass fibers, in the form of embedded fibers. The length of the fibers largely corresponds to the length of the tension member.

[0019] In one embodiment of the anchor head system, the tension member is designed as a flat rectangular bar or as a lamella, which can be anchored in a pre-drilled hole in the substrate as a non-prestressed tension member. A tension member shaped in this way is hereinafter also referred to as a lamella, which extends in a longitudinal direction. Preferably, the ratio of long side length to short side length is approximately 4:1. Other shapes of a tension member, for example a round tension member, are conceivable, wherein the tension member is designed as a longitudinally extending lamella at least at one end. The end region shaped as a lamella can be formed onto the rest of the tension member or connected to the tension member as a separate element.

[0020] According to one embodiment of the anchor head system according to the invention, the tension member is designed in the form of a flat rectangular bar, which can be manufactured simply and cost-effectively from fiber-reinforced plastic using a pultrusion process.

[0021] In contrast to conventional anchor head systems with a cylindrical tension member, where a thread is applied to the end protruding from the substrate and an anchor nut can be screwed onto it for tensioning, the invention provides a different type of tensioning. This avoids weakening the fiber-reinforced plastic section of the tension member where the thread would otherwise be machined. According to the invention, tensioning devices are provided that do not require a thread but instead incorporate a locking mechanism, in particular a wedge lock. Thus, the force of the tension member can be transferred via static friction into the wedge, which is pressed against the clamping sleeve and transmits the force to the anchor plate via its outer surface.

[0022] The shape and / or material selection is determined by the tensile strength of the anchor rods. The contact and / or force transmission between corresponding surfaces of the wedge element and tension member pairing can be improved by providing a roughness to the contact surfaces of the tension member and / or the wedge element, preferably an adjustable roughness. In one embodiment of the anchor head system according to the invention, the defined roughness can be achieved by coating it with a granular material. A quartz sand with a defined grain size is suitable for this purpose, as it can be applied in a specific layer thickness to at least one of the contact surfaces of the tension member and / or wedge element.A defined grain size can refer both to a grain size distribution, which is chosen to be particularly homogeneous, and to the shape and dimensions of the grains, which can be selected in such a way as to provide the most optimal pairing possible at the contact surface between the tension member and the wedge.

[0023] The anchor head system according to the invention comprises an anchor plate, also made of a fiber-reinforced plastic, in particular a glass fiber-reinforced plastic. The anchor plate can be manufactured using a suitable molding process.

[0024] The shape of the anchor plate of the anchor head system according to the invention is not restricted, but is preferably disc-shaped. The anchor plate generally has a bearing surface facing the substrate and an opposing curved or conical outer surface. The diameter of the anchor plate and / or the height of the curvature of the outer surface can be adapted to the forces prevailing during the use of the anchor head system. A number of ribs extending radially towards the center can be manufactured on the outer surface. These ribs reinforce the anchor plate without increasing its weight. The number of ribs is selectable, tailored to the bending moment that the anchor plate can withstand during use. Preferably, the diameter of the fiber-reinforced anchor plate of the anchor head system according to the invention is larger than that of conventional steel anchor plates.The selected size of the fiber-reinforced anchor plate, combined with a suitable infill panel, provides a sufficient contact surface with the substrate. Thanks to the chosen plastic material, the anchor plate is lightweight and therefore easy to transport, store, and handle.

[0025] The anchor plate of the anchor head system according to the invention has the anchor hole bore through which the tension member can be guided. In one embodiment, the central anchor hole bore is at least partially formed in a conically tapered shape. In particular, the shape of the anchor hole bore is adapted to an outer shape of the clamping sleeve, which can be arranged in a receiving area thus formed in the anchor plate. InIn one embodiment, the anchor hole bore in the receiving area for the clamping sleeve has an expanding inner cone, the opening angle of which is matched to the complementary counter-cone of the clamping sleeve. For example, the opening angle of the inner cone relative to the longitudinal axis can be between 2° and 10°, preferably between 3° and 6°.

[0026] The clamping sleeve, held in the conically shaped receiving area, is pressed against its axial center. This reinforces the seat of the tension member, which can be arranged in the clamping sleeve and secured by the wedge. The contact pressure is distributed evenly, preventing any damage to the tension member.

[0027] The longitudinal shape of the anchor plate's receiving area can include a conical section that transitions into a cylindrical through-bore. The diameter of the cylindrical through-bore can be matched to the diameter of the tension member to allow it to pass through.

[0028] In the transition area thus formed between the conical receiving area and the cylindrical through-bore, a support surface is provided for the clamping sleeve. In particular, the support surface is inclined relative to the longitudinal axis. This inclined support surface thus provides a larger support area for the clamping sleeve compared to conventional anchor head systems. It has been shown that this type of support surface shape makes it possible to compensate for geometric deviations in the clamping sleeve and anchor plate pairing. Likewise, installation can be facilitated if the tension member is not exactly aligned with the longitudinal axis of the anchor bore.

[0029] According to the invention, the clamping means for clamping the tension member against the anchor plate comprise the clamping sleeve and wedge means. The clamping sleeve and the wedge means form the central part of a locking mechanism, wherein the clamping sleeve can be brought into operative contact with both the anchor plate and the wedge means, and the wedge means can be brought into operative contact with both the clamping sleeve and the tension member, in order to connect the tension member to the anchor plate.

[0030] The clamping sleeve is also made of fiber-reinforced plastic, in particular glass fiber-reinforced plastic. According to a preferred embodiment, the clamping sleeve is multilayered. In particular, the clamping sleeve comprises an inner sleeve, or inner layer, formed from a fiber-reinforced plastic compound and an outer layer applied to the outside. The outer layer can be formed as a fiber winding of strand- or strip-shaped fiber material, which is subsequently applied to the inner sleeve. The fiber winding, containing hybrid fibers of carbon, glass, and / or aramid fibers, can be applied as a radial winding or in a crosswise arrangement in one or more layers. The fiber winding, in selectable material, thickness, and orientation, can increase the tensile and shear strength of the clamping sleeve against radial forces.

[0031] The clamping sleeve can have a hollow, at least partially conical shape, with the outer and inner shapes potentially differing. Preferably, the clamping sleeve is designed in the form of a hollow truncated cone with a base whose shape can be largely described as a rectangle with narrow sides formed as circular segments. If the outer and inner shapes of the clamping sleeve are complementary, the wall thickness is uniform along its longitudinal axis. The outer shape of the clamping sleeve can also include a cylindrical section that can be at least partially received in a correspondingly shaped receiving area of ​​the anchor plate.

[0032] The tension member, which extends longitudinally through the anchor hole of the anchor plate and through the tension sleeve itself, is received within the inner sleeve of the clamping sleeve. The tension member, positioned within the clamping sleeve, is locked in place by means of wedges. Preferably, these wedges comprise two wedges that are longitudinally displaceable within the clamping sleeve along the end region of the tension member and are held in a self-clamping position at its opposing contact surfaces. Thus, the first wedge is displaceable into a first gap and the second wedge into a second gap along the longitudinal axis of the tension member. These gaps are each bounded by a section of the tension member and areas of the inner wall of the clamping sleeve.

[0033] In one embodiment, the shape of each wedge of the wedge means is adapted to the space in which the wedges are received. The first and second spaces are provided in the cavity or interior of the clamping sleeve and are bounded by a contact surface of the positioned tension member and the first and second regions of the inner wall of the clamping sleeve. The wedge inserted into the respective space preferably fills it completely radially, but not axially. The wedge is not in contact with the anchor plate; a free space remains between them. Thus, each wedge forms the largest possible contact surface with the tension member and the clamping sleeve, so that the tension member is locked in the sleeve with the absorbing force.

[0034] The wedge material is sufficiently stiff to absorb forces and sufficiently soft to ensure adequate contact with the tension member. The wedge's shape maximizes the contact area between the tension member and the wedge, and the wedge has sufficient material thickness to withstand the forces. Furthermore, the contact surfaces between the wedge and the tension member can be designed with adjustable roughness.

[0035] In another embodiment, the anchor head system is combined with a planar infill comprising a geogrid and optionally an erosion control fabric. The erosion control fabric does not serve a structural function but prevents washout and surface erosion of the underlying subsoil. The geogrid, on the other hand, does serve a structural function and provides reinforcement.

[0036] Various materials or combinations of erosion control fabric and / or geogrids are possible. The infill can also consist of a geotextile, geowoven fabric, geowoven material, geonet, and / or geocomposite, which are generally known as geosynthetics. Geosynthetics are used for separation, filtering, drainage, reinforcement, protection, sealing, etc., often fulfilling several of these functions. The infill can be made of synthetic polymeric material, such as linear polyester (PET), polyethylene (PE), polyamide (PA), and / or polypropylene (PP), or using synthetic raw materials like high-tensile-strength glass fibers. Geogrids and / or erosion control fabrics are correspondingly flexible, allowing for quick and easy installation even on uneven terrain.Thus, the infill proves suitable for securing slopes, embankments, excavations, and / or terrain protrusions with regard to durability, cost, and installation time, and potentially also for dismantling. Since the infill is designed after the boreholes for anchoring the anchor rods have been drilled, it is ensured that the geogrid has sufficiently large mesh openings to allow for adjustments to prevent damage to the geogrid.

[0037] Further details of the invention will become apparent from the following description of the preferred embodiments of the anchor head system according to the invention, which are illustrated by way of example in the accompanying drawings. Further advantages of the present invention can be gleaned from the description, as well as suggestions and proposals on how the subject matter of the invention can be modified or further developed within the scope of the claim. Brief description of the drawings

[0038] The embodiments of the invention are explained in more detail below with reference to the drawing. The drawing shows: Figure 1 a schematic perspective representation of an anchor head system according to the invention; Figure 2 a schematic sectional view of an anchor head system according to the invention; Figure 3 a perspective view of an anchor plate according to the invention; Figure 4a a perspective view of a clamping sleeve according to the invention; Figure 4b a perspective view of a wedge of the wedge means according to the invention; Figure 5 a schematic sectional view of the anchor head system according to Figure 1 in combination with infill. Preferred embodiments of the invention

[0039] In Figure 1A schematic perspective view of an anchor head system 1 according to the invention is shown. The anchor head system 1 is used for securing slopes and / or changes in elevation, as well as for securing excavations up to a defined height, and represents a cost-effective and environmentally friendly alternative to previously known steel anchor systems. The anchor head system 1 comprises a tension member 10, an anchor plate 20, and tensioning elements 30, which include a tension sleeve 40 and a wedge element 50. All components of the anchor head system are made of a fiber-reinforced plastic, in particular a glass fiber-reinforced plastic, with different fiber-reinforced plastics being used depending on the function.

[0040] As in Figure 1The tension member 10 can be designed as a flat rectangular bar. Preferably, the tension member 10 is manufactured from glass fiber reinforced plastic using an extrusion process. A tension member 10 designed as a lamella with a ratio of long side edge to short side edge of approximately 4:1 has proven particularly suitable. The thickness, i.e., the wall thickness, of the rectangular tension member can be in the range of 8 to 15 mm. To improve force transmission, the tension member 10 can have a homogeneous rough surface along its entire length, but at least in the locking area. The surface roughness can be achieved by coating it, for example, by applying a quartz sand with a defined grain size in a specific layer thickness and adhering via a suitable adhesive.In this process, the quartz sand is selected in such a way that optimal adhesion of the wedge element - tension member pairing is achieved through the achievable static friction.

[0041] The tension member 10 is anchored in a borehole in the subsoil in a known manner, with one opposite end protruding from the subsoil and being guided through the anchor plate 20 or a provided central anchor hole 21. In the illustrated embodiment, the anchor plate 20 is disc-shaped and made of a fiber-reinforced plastic, for example by a suitable molding process.

[0042] The anchor plate 20 has a support surface 23 facing the substrate and an opposing curved or conically shaped outer surface 24. Radially extending ribs 25 are provided on the outer surface 24, extending to the longitudinal axis 12. The ribs 25 can in turn be stiffened by sections 26 arranged concentrically to the longitudinal axis 12.

[0043] The central anchor bore 21 comprises a conical receiving area 21a, which transitions at its tapered end into a cylindrical through bore 21c via a transition area 21b. The transition area 21b provides a support surface 27 for a clamping sleeve 40 that can be received in the receiving area 21a and, in the illustrated embodiment, is inclined relative to the longitudinal axis 12.

[0044] The clamping sleeve 40 can be received, at least partially and slidably, in the conically shaped receiving area 21a and is supported by the annular transition area 21b. The clamping sleeve 40 is also made of a fiber-reinforced plastic, preferably a glass fiber-reinforced plastic. Details of the clamping sleeve 40 are described with reference to the Figure 4a described.

[0045] In the anchor head system 1, the clamping sleeve 40 is at least partially received in the conical receiving area 21a of the anchor plate 21, the shape of the clamping sleeve 40 roughly corresponding to a hollow truncated cone. The base of the clamping sleeve 40 consists of a rectangle with circular segments on its short side faces and extends transversely to the longitudinal axis 12 with a dimension 41a, widening conically in the direction of the longitudinal axis 12. The dimension 41a of the base at a lower end of the clamping sleeve 40, which is received in the receiving area 21a of the anchor bore 21, is adapted to the diameter of the receiving area 21a of the anchor bore 21 at the transition to the transition area 21b.

[0046] As in Figure 1The tension member 10 is shown passing through the anchor hole 21 of the anchor plate 20 and through a clamping sleeve 40. Between the tension member 10 and an inner wall 41 of the clamping sleeve 40, a first gap 42a and a second gap 42b are formed, each having an approximately tapered wedge shape. The wedge elements 50, i.e., a first wedge 51a and a second wedge 51b of the clamping elements 30, can be inserted into the first gap 42a and the second gap 42b, at least partially slidably, along the longitudinal axis 12, in order to hold the tension member 10 in position within the clamping sleeve 40 and clamp it against the anchor plate 20. To facilitate insertion of the wedge elements 50 into the clamping sleeve 40, the inner wall 41 of the clamping sleeve 40 and the complementary outer surface of the wedge elements 50 are smooth.

[0047] Figure 2Figure 1 shows the anchor head system 1 in a schematic sectional view. The shape of the first wedge 51a and the second wedge 51b can be seen, each of which is adapted, at least partially, to the conical shape of the inner wall 41 of the clamping sleeve 40 and to the flat side surface of the tension member 10. To improve the force transmission between the tension member 10 and the first wedge 51a and the second wedge 51b, respectively, corresponding contact surfaces 11 between the tension member 10 and the first wedge 51a and the second wedge 51b are formed with a defined roughness.

[0048] Furthermore, the shape of the anchor bore 21 is recognizable, which includes the conically shaped receiving area 21a, the similarly inclined transition area 21b and the through bore 21c, which can be either cylindrical or conical with a different opening angle than the receiving area 21a.

[0049] In Figure 3The anchor plate 20 is shown in a perspective view of a preferred embodiment. Visible are the radially extending ribs 25 along the longitudinal axis 12, which are provided on the conically shaped outer surface 24. The number and shape of the ribs 25 can vary and are specifically designed to enable the anchor plate 20 to withstand higher bending moments. For further reinforcement, the ribs 25 can be reinforced by sections 26 arranged concentrically around the longitudinal axis 12. This design optimizes the inherently disk-shaped anchor plate 20 to minimize stresses.

[0050] The Figure 4aFigure 1 shows in detail the clamping sleeve 40, whose depicted shape can be approximately described as a hollow truncated cone. The shape of the clamping sleeve 40, i.e., the outer shape as well as the design of the hollow interior, is chosen such that the contact surfaces between the wedge means 50 and the clamping sleeve 40 on the one hand, and between the clamping sleeve 40 and the anchor plate 20 on the other, are maximized. Accordingly, other outer and inner shapes of the clamping sleeve 40 are also conceivable, for example, corresponding to a truncated cone with an annular base.

[0051] According to a preferred embodiment, the clamping sleeve 40 can be composed of an inner sleeve 44 and a fiber winding 46 applied at least partially to its outer surface 45. The fiber winding 46, which can be applied after the inner sleeve 44 has been manufactured, particularly increases the clamping sleeve 40's resistance to radial forces.

[0052] In the Figure 4bThe first wedge 51a of the wedge means 50, which comprise the first wedge 51a and the second wedge 51b, is shown in perspective. The shapes of the first wedge 51a and the second wedge 51b are mirror images of each other, so that they can be slidably received in the first gap 42a and the second gap 42b, respectively, in the clamping sleeve 40 and along the tension member 10. Preferably, the first wedge 51a fills the first gap 42a and the second wedge 51b the second gap 42b. The first gap 42a and the second gap 42b are bounded by the tension member 10 and the inner wall 41 of the clamping sleeve 40. The inserted wedges 51a and 51b completely fill the corresponding gaps 41a and 41b. Thus, a curved outer wedge surface 53a of the first wedge 51a shown lies against the inner wall 41 of the first gap 42a and a flat contact surface 52a lies against the contact surface 11 of the tension member 10.

[0053] Figure 5Figure 1 schematically shows the anchor head system 1 in conjunction with a reinforcement 60 for securing slopes and / or terrain discontinuities as well as excavations. The embodiment of the reinforcement 60 comprises an erosion control fleece 61, which can be laid directly on the substrate and protects it from surface erosion. A geogrid 62, which serves as reinforcement, can be placed on the erosion control fleece 61, with the erosion control fleece 61 and geogrid 62 being fixed to the substrate by means of the anchor head system.

Claims

1. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits, comprising - a tension member (10) made of fibre-reinforced plastic and designed to be able to be anchored in a borehole, - an anchor plate (20) made of fibre-reinforced plastic, with an anchor hole (21) through which anchor hole (21) an end section of the tension member (10) is able to be passed, and - clamping means (30) made of fibre-reinforced plastic, which are able to be received on the tension member (10) in order to connect the tension member (10) and the anchor plate (20), whereby these clamping means (30) comprise a clamping sleeve (40) that is able to be inserted into the anchor hole (21) of the anchor plate (20) and wedge means (50) which are able to be displaced longitudinally along contact surfaces at the end region of the tension member (10) in the clamping sleeve (40) and form a wedge connection, characterized in that the tension member (10) is designed as a lamella extending in the longitudinal direction.

2. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to claim 1, characterized in that the contact surfaces (11) of the tension member (10) have an adjustable roughness.

3. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to claim 2, characterized in that the roughness of the contact surfaces (11) of the tension member (10) is adjustable by means of a coating with a granular material.

4. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to one of the preceding claims, characterized in that the anchor plate (20) is disc-shaped.

5. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to one of the preceding claims, characterized in that the anchor plate (20) comprises a support surface (23) directed towards the substrate and an opposite formed outer surface (24), whereby the outer surface (24) comprises a number of ribs (25) extending radially towards the centre.

6. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to one of the preceding claims, characterized in that the anchor hole (21) of the anchor plate (20) has a conically tapering receiving area (21a) for the clamping sleeve (40), a transition area (21b) with a support surface (27) inclined towards the longitudinal axis (12) for the clamping sleeve (40) which is able to be at least partially accommodated in the receiving area (21a), and a through hole (21c).

7. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to one of the preceding claims, characterized in that the clamping sleeve (40) comprises an inner sleeve (44) formed from a fibre-reinforced plastic mass and a fibre winding (46) that is able to be applied thereto.

8. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to one of the preceding claims, characterized in that the clamping sleeve (40) is designed in the form of a hollow truncated cone.

9. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to one of the preceding claims, characterized in that the wedge means (50) comprise a first wedge (51a) and a second wedge (51b).

10. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to claim 9, characterized in that the first wedge (51a) is slidable along the longitudinal axis (12) into a first intermediate space (42a) bounded by the tension member (10) and a region of an inner wall (41) of the clamping sleeve (40), and the second wedge (51b) is slidable along the longitudinal axis (12) into a second intermediate space (42b) bounded by the tension member (10) and a region of the inner wall (41) of the clamping sleeve (40).

11. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to claim 10, characterized in that the first wedge (51a) completely fills the first intermediate space (42a) and the second wedge (51b) completely fills the second intermediate space (42b) radially.

12. Anchor head system (1) for securing embankments and / or terrain breaks as well as for securing excavation pits according to one of the preceding claims, characterized in that the anchor head system (1) further comprises an infill (60) with an erosion fleece (61) and a geogrid (62) made of fibre-reinforced plastic.