Anchor head system

Abstract

The present application relates to an anchor head system (1) for securing slopes and / or terrain discontinuities as well as for securing excavations, comprising a tension member (10) made of fiber-reinforced plastic and designed to be anchored in a borehole, an anchor plate (20) made of fiber-reinforced plastic with an anchor hole bore (21) through which an end region of the tension member (10) can pass, and clamping elements (30) made of fiber-reinforced plastic, which can be received on the tension member (10) to connect the tension member (10) and the anchor plate (20). The clamping elements (30) comprise a clamping sleeve (40) that can be received into the clamping hole bore (21) of the anchor plate (20) and wedge elements (50) that are slidable longitudinally along the end region of the tension member (10) in the clamping sleeve (40) and form a wedge connection.

Description

Technical field of the invention

[0001] The invention relates to an anchor head system for securing slopes and / or terrain jumps, as well as for securing excavations. 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, but especially for tunnel construction. At least some of the system components are 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 layers. A fiber-reinforced plastic material allows for corrosion-resistant and high-tensile use of the anchor head system. However, corresponding anchor head systems do not yet exhibit the strength values ​​achievable with conventional steel anchor systems. Accordingly, various anchor head systems have been developed to increase the load-bearing capacity and strength values ​​of such a system.

[0003] Anchor head systems made of fiber-reinforced plastic generally 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 known as retaining walls for securing slopes and terrain discontinuities can also include geotextile infill in addition to an anchor head system. A retaining wall comprising components of the anchor head system and infill made of fiber-reinforced plastic can be referred to as a plastic retaining wall.

[0004] Although anchor rods made of fiber-reinforced plastic can transmit high tensile forces, a thread formed on this tension member in the anchor head area weakens its effective load, making it incomparable to that of conventional steel anchors. To ensure sufficient force transmission, thread manufacturing is complex.

[0005] To increase the load-bearing capacity of plastic anchors, sleeves can be used instead of an anchor nut that can be screwed onto a thread cut into the tension member. A sleeve with an internal cone is known, which can be 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 security, DE 29804743 U1 discloses placing a steel sleeve onto a tension member end that can be expanded with a wedge and securing it with adhesive. The steel sleeve has a thread on its cylindrical outer side, 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 bolt with a glass fiber reinforced plastic (GRP) anchor rod and a tensioning element with an anchor plate, as well as a fixing element adjacent to the anchor rod. The fixing element comprises a wedge that can be pushed onto the anchor rod and has a conical shape that corresponds to a counter-cone of a clamping sleeve that is also included. The wedge is displaceable in the longitudinal direction of the counter-cone via a tensioning device that is partially accommodated in the clamping sleeve and displaceably mounted over the anchor rod. The wedge has a higher coefficient of friction on an inner surface in contact with the anchor rod than on its outer surface, for an improved friction coefficient.This described anchor head system therefore comprises a large number of elements, so that both the locking achieved with it and the coordination of the elements with each other are complex and prevent simple and error-free use.

[0007] For securing slopes, terrain changes, and / or shallow excavations, reinforcement mesh, geotextiles, and / or erosion control mats are known, in addition to an anchor head system. These infills provide effective protection against surface and near-surface instabilities. Accordingly, a flexible mesh can be laid out over the area to be secured and secured with a number of spaced-apart anchor head systems.

[0008] There is still a need for an improved multi-part anchor head system made exclusively of fiber-reinforced plastic, which is also suitable for interacting with an infill as a combination of erosion fleece and geogrid in such a way that a novel retaining wall is available for securing embankments, terrain jumps and / or excavations. Summary of the invention

[0009] The object of the present invention is therefore to provide an anchor head system for securing slopes of any kind, terrain changes, and / or excavation walls against superficial and / or deep-level sliding, while being easy to install, lightweight, and corrosion-resistant. Particularly in combination with a flat infill, a predetermined limited terrain deformation can be tolerated by means of the anchor head system while maintaining overall stability.

[0010] The object is achieved by an anchor head system for securing slopes and / or terrain jumps as well as for securing excavations according to claim 1. Advantageous embodiments and further developments of the invention emerge from the dependent claims.

[0011] A key feature of the inventive solution is that the anchor head system for securing slopes and / or terrain jumps, as well as for securing excavations, is made entirely of fiber-reinforced plastic. Preferably, all system components are made at least partially of glass-fiber-reinforced plastic (GRP). 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, such as epoxy resin.

[0012] The anchor head system according to the invention avoids the need for individual system components and possibly infill panels to be made of a material susceptible to corrosion, such as steel, which would impact service life and structural safety in a corrosive environment. Furthermore, it avoids the need to apply a reinforced concrete layer to secure the slope and / or terrain changes, as well as to secure excavations, which would have negative consequences for people and the environment. Another advantage of the solution according to the invention is that there are no delays in installing the slope or excavation protection due to the curing times required for a shotcrete wall, thus reducing the overall effort required.A further advantage of the inventive solution over conventional fuses is that installation is independent of frost periods, that corrosion protection is guaranteed against corrosive media and other influences in the subsurface and in the head area, and that the components can be dismantled and recycled as completely as possible. The inventive anchor head system is particularly suitable for areas with potentially occurring stray currents, for example, near railway lines.

[0013] Fiber-reinforced plastic anchor head systems are lightweight and therefore advantageous, as transport times can be reduced due to simplified transport to and from the construction site, as well as installation times. To improve the known disadvantages of fiber-reinforced plastic anchor head systems compared to steel anchors, system components of the inventive anchor head system are optimized to achieve tensile forces comparable to those of steel anchors.

[0014] The invention relates to an anchor head system for securing slopes and / or terrain jumps as well as for securing excavations, 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 through which an end region of the tension member can be passed, and tensioning means made of fiber-reinforced plastic which can be received on the tension member.

[0015] The tensioning means comprise a clamping sleeve which can be partially accommodated in the anchor hole of the anchor plate and wedge means which can be displaced in the longitudinal direction along contact surfaces at the end region of the tension member in the clamping sleeve and form a wedge connection.

[0016] In principle, the tension member can also be referred to as an anchor rod and, due to its shape, as a lamella. The tension member is made of fiber-reinforced plastic, particularly glass-fiber-reinforced plastic. A thermoset can be used as the plastic, which is reinforced, in particular, 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.

[0017] In one embodiment of the anchor head system, the tension member is designed as a flat rectangular bar or lamella, which can be anchored in the subsoil in a prefabricated borehole as a non-prestressed tension member. Other tension member shapes are conceivable. A tension member shaped in this way is also referred to as a lamella, which extends in a longitudinal direction. The ratio of the long side length to the short side length is preferably approximately 4:1.

[0018] Alternatively, an otherwise round tension member may have a longitudinally extending lamella at one end region, which is integrally formed or connectable to the tension member as a separate element.

[0019] 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 from fiber-reinforced plastic in a simple and cost-effective manner by means of a pultrusion process.

[0020] In contrast to conventional anchor head systems with a cylindrical tension member, in which a thread is applied to the end region protruding from the ground and onto which an anchor nut can be screwed for tensioning, the invention provides a different type of tensioning. This prevents the area of ​​the tension member made of fiber-reinforced plastic, in which the thread is otherwise manufactured, from being weakened by the thread. According to the invention, tensioning devices are provided which do not require a thread but provide a locking mechanism, in particular a wedge locking mechanism. Accordingly, the force of the tension member can be introduced via static friction into the wedge means, which are pressed against the clamping sleeve and introduce the force into the anchor plate via their outer surface.

[0021] 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 / tensile member pair can be improved by providing contact surfaces of the tensile member and / or the wedge element with a roughness, preferably an adjustable roughness. In one embodiment of the anchor head system according to the invention, the defined roughness can be achieved by coating with a granular material. Quartz sand with a defined grain size is suitable for this purpose, and can be applied in a specific layer thickness to at least one of the contact surfaces of the tensile member and / or wedge element.A defined grain size can be understood as both a grain size distribution, which is particularly selected to be homogeneous, and the shape and dimension of the grains, which can be selected in such a way that an optimal pairing is provided at the contact surface between the tension member and the wedge means.

[0022] 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.

[0023] 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 support surface facing the subsurface 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 use of the anchor head system. A number of ribs extending radially toward the center can be manufactured on the outer surface. These ribs reinforce the anchor plate without increasing its weight. The number of ribs can be selected, depending on the bending moment that the anchor plate can absorb during use. The diameter of the fiber-reinforced anchor plate of the anchor head system according to the invention is preferably larger than that of conventional steel anchor plates.The selected size of the fiber-reinforced anchor plate, combined with a suitable infill, provides sufficient contact area with the subgrade. The selected plastic material makes the anchor plate lightweight and therefore easy to transport, store, and handle.

[0024] The anchor plate of the anchor head system according to the invention has the anchor hole through which the tension member can be guided. In one embodiment, the central anchor hole is at least partially formed in a conically tapered shape. In particular, the shape of the anchor hole is matched to an outer shape of the clamping sleeve, which can be arranged in a receiving area thus formed in the anchor plate. In one embodiment, the anchor hole in the receiving area for the clamping sleeve has a widening inner cone, the opening angle of which is matched to the complementarily formed mating 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°.

[0025] The clamping sleeve, housed in the conically shaped receiving area, is pressed against its axial center. This strengthens the fit of the tension member, which is arranged in the clamping sleeve and secured by the wedge means. The contact pressure is distributed evenly, preventing damage to the tension member housed therein.

[0026] The longitudinal shape of the anchor plate's receiving area can include a conical section that transitions into a cylindrical through-hole. The diameter of the cylindrical through-hole can be adjusted to the diameter of the tension member, allowing it to pass through.

[0027] In a transition area thus formed between the conical receiving area and the cylindrical through-bore, a support surface is provided to support the clamping sleeve. In particular, the support surface is inclined relative to the longitudinal axis. Thus, the inclined support surface provides a larger support surface 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 pair. Likewise, installation can be facilitated if a tension member is not exactly aligned with the longitudinal axis of the anchor hole.

[0028] According to the invention, the tensioning means for clamping the tension member against the anchor plate comprise the tension sleeve and wedge means. The tension sleeve and wedge means form the central part of a locking mechanism, wherein the tension sleeve can be brought into operative connection with both the anchor plate and wedge means, and the wedge means can be brought into operative connection with both the tension sleeve and the tension member in order to connect the tension member to the anchor plate.

[0029] 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 constructed in multiple layers. In particular, the clamping sleeve comprises an inner sleeve, or an inner layer, formed from a fiber-plastic compound, and an outer layer applied to the outside. The outer layer can be formed as a fiber winding made of strand- or ribbon-shaped fiber material, which is subsequently applied to the inner sleeve. The fiber winding, containing hybrid fibers made 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 a selectable material, thickness, and orientation, can increase the tensile and shear strength of the clamping sleeve against radial forces.

[0030] The clamping sleeve can have a hollow, at least partially conical shape, whereby the outer and inner shapes can differ from one another. The clamping sleeve is preferably 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 have a cylindrical region, which can be at least partially accommodated in a correspondingly shaped receiving area of ​​the anchor plate.

[0031] The tension member can be accommodated in the inner sleeve of the clamping sleeve and extends longitudinally through the anchor hole in the anchor plate and through the clamping sleeve that can be accommodated in the receiving area of ​​the anchor hole. The tension member positioned in the clamping sleeve is locked by means of the wedge means. Preferably, the wedge means comprise two wedges that are displaceable longitudinally into the clamping sleeve along the end region of the tension member at its opposite contact surfaces and are held in a self-clamping manner. Accordingly, the first wedge can be displaced into a first space and the second wedge into a second space along the longitudinal axis of the tension member. The spaces are each delimited by a section of the tension member and regions of the inner wall of the clamping sleeve.

[0032] In one embodiment, the shape of each of the wedges of the wedge means is adapted to the gap in which the wedges are accommodated. The first and second gaps are provided in the cavity or interior of the clamping sleeve and are delimited by a contact surface of the positioned tension member and the first region and the second region of the inner wall of the clamping sleeve. The wedge inserted into the respective gap preferably fills it completely radially, but not axially. The wedge is not in contact with the anchor plate, but rather a free space remains between them. Accordingly, each wedge forms the largest possible contact surface with the tension member and the clamping sleeve, so that the tension member is blocked in the sleeve with the absorbing force.

[0033] The material of the wedges is sufficiently stiff to absorb forces, yet sufficiently soft to ensure adequate contact with the tension member. The shape of the wedge allows for a maximum contact area between the tension member and the wedge, and the wedge has sufficient material thickness to withstand the forces that occur. Furthermore, the contact surfaces of the respective wedge with the tension member can be provided with an adjustable roughness.

[0034] In another embodiment, the anchor head system is combined with a flat infill layer comprising a geogrid and possibly an erosion control fabric. An erosion control fabric does not have a structural function, but rather prevents erosion and surface erosion of the subsoil it covers. A geogrid, on the other hand, has a structural function and serves as reinforcement.

[0035] Different materials or combinations of erosion control fabric and / or geogrid are conceivable. The infill can also contain a geotextile, a geofabric, a geoknitted fabric, a geonet and / or a geocomposite, which are generally known as geosynthetics. Geosynthetics are used for separation, filtering, drainage, reinforcement, protection, sealing, etc., and they often fulfill several of these functions. The infill can be made of synthetic polymeric material, e.g. linear polyester (PET), polyethylene (PE), polyamide (PA) and / or polypropylene (PP), or using synthetic raw materials such as glass fibers with a high tensile strength. Geogrids and / or erosion control fabric are correspondingly flexible, allowing quick and easy infill even on uneven terrain.Thus, the infill proves to be suitable for securing slopes, embankments, excavations, and / or terrain projections in terms of durability, cost, and time required for installation and, potentially, removal. Since the infill is laid out after the drill holes for anchoring the anchor rods have been drilled, the geogrid is designed to have sufficiently large mesh openings to prevent damage by adjusting the geogrid.

[0036] 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 derived from the description, as well as suggestions and proposals for how the subject matter of the invention can be modified or further developed within the scope of the claimed. Brief description of the drawings

[0037] The embodiments of the invention are explained in more detail below with reference to the drawings. They show: Figure 1 a schematic perspective view 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

[0038] In Figure 11 shows a schematic perspective view of an anchor head system 1 according to the invention. The anchor head system 1 is used to secure slopes and / or terrain discontinuities as well as to secure 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 means 30, which includes a tension sleeve 40 and wedge means 50. All components of the anchor head system are made of a fiber-reinforced plastic, in particular a glass-fiber-reinforced plastic, although different fiber-reinforced plastics are also used depending on the function.

[0039] As in Figure 1As shown, the tension member 10 can be designed as a flat rectangular bar. The tension member 10 is preferably manufactured from glass fiber reinforced plastic using an explosive drawing 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 between 8 and 15 mm. To improve force transmission, the tension member 10 can have a homogeneous, rough surface over its entire length, but at least in the area of ​​the locking mechanism. The roughness of the surface can be achieved by means of a coating, such as sanding with quartz sand of a defined grain size, which is applied in a certain layer thickness and adheres using a suitable adhesive.The quartz sand is selected in such a way that optimal adhesion of the wedge element - tension member pair is achieved through the static friction that can be generated.

[0040] The tension member 10 is anchored in a borehole in the subsurface in a known manner, with an opposite end protruding from the subsurface and being passable 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.

[0041] The anchor plate 20 has a support surface 23 directed toward the ground and an opposite curved or conical outer surface 24. Ribs 25 extending radially to the longitudinal axis 12 are provided on the outer surface 24. The ribs 25 can, in turn, be stiffened by sections 26 arranged concentrically to the longitudinal axis 12.

[0042] The central anchor hole 21 comprises a conical receiving area 21a, which at its tapered end area transitions 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.

[0043] The clamping sleeve 40 can be accommodated at least partially displaceably in the conical receiving area 21a and is supported on 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 in more detail below. Figure 4a described.

[0044] 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, wherein the shape of the clamping sleeve 40 approximately corresponds to a hollow truncated cone. The base area of ​​the clamping sleeve 40 is composed of a rectangle with circular segments on short side surfaces and extends transversely to the longitudinal axis 12 with a dimension 41a and widens conically in the direction of the longitudinal axis 12. The dimension 41a of the base area at a lower end of the clamping sleeve 40, which can be received in the receiving area 21a of the anchor hole 21, is adapted to the diameter of the receiving area 21a of the anchor hole 21 at the transition to the transition area 21b.

[0045] As in Figure 1The tension member 10 is shown guided through the anchor hole 21 of the anchor plate 20 and through a clamping sleeve 40. A first intermediate space 42a and a second intermediate space 42b, which have an approximately tapered wedge shape, are formed between the tension member 10 and an inner wall 41 of the clamping sleeve 40. The wedge means 50, i.e. a first wedge 51a and a second wedge 51b of the clamping means 30, can be inserted at least partially displaceably along the longitudinal axis 12 into the first intermediate space 42a and the second intermediate space 42b, in order to hold the tension member 10 in position in the clamping sleeve 40 and to clamp it against the anchor plate 20. To improve the insertion of the wedge means 50 into the clamping sleeve 40, the inner wall 41 of the clamping sleeve 40 and the complementary outer surface of the wedge means 50 are smooth.

[0046] Figure 2shows 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 here, which is at least partially adapted, on the one hand, to the conical shape of the inner wall 41 of the clamping sleeve 40 and, on the other hand, 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 or the second wedge 51b, corresponding contact surfaces 11 between the tension member 10 and the first wedge 51a or the second wedge 51b are formed with a defined roughness.

[0047] Furthermore, the shape of the anchor hole 21 can be seen, which comprises the conically shaped receiving area 21a, the likewise inclined transition area 21b and the through hole 21c, which can be either cylindrical or conical with a different opening angle than the receiving area 21a.

[0048] In Figure 3The anchor plate 20 is shown in a perspective view in a preferred embodiment. Visible are the ribs 25, which extend radially in the direction of the longitudinal axis 12 and are provided on the conically shaped outer surface 24. The ribs 25 can vary in number and shape and are provided in particular so that the anchor plate 20 can absorb higher bending moments. For reinforcement, the ribs 25 can be further reinforced with one another via sections 26 arranged concentrically around the longitudinal axis 12. This essentially disc-shaped anchor plate 20 is optimized by this design to ensure the lowest possible stresses.

[0049] The Figure 4ashows in detail the clamping sleeve 40, the shape of which can be approximately described as a hollow truncated cone. The shape of the clamping sleeve 40, i.e., the outer shape but also the design of the hollow interior, is selected 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.

[0050] According to a preferred embodiment, the clamping sleeve 40 can be constructed from 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 strength of the clamping sleeve 40 against radial forces.

[0051] In the Figure 4bThe first wedge 51a of the wedge means 50 is shown in perspective, comprising the first wedge 51a and the second wedge 51b. The shape of the first wedge 51a and the second wedge 51b are mirror images of each other, so that they can each be slidably received in the first intermediate space 42a and the second intermediate space 42b in the clamping sleeve 40 and along the tension member 10. Preferably, the first wedge 51a fills the first intermediate space 42a and the second wedge 51b fills the second intermediate space 42b. The first intermediate space 42a and the second intermediate space 42b are delimited by the tension member 10 and the inner wall 41 of the clamping sleeve 40. The inserted wedges 51a, 51b completely fill the corresponding intermediate spaces 41a, 41b. Thus, a curved wedge outer surface 53a of the illustrated first wedge 51a rests against the inner wall 41 of the first intermediate space 42a and a flat contact surface 52a rests against the contact surface 11 of the tension member 10.

[0052] Figure 5schematically shows the anchor head system 1 in conjunction with an infill 60 for securing slopes and / or terrain jumps, as well as excavations. The embodiment of the infill 60 comprises an erosion mat 61, which can be placed directly on the subsoil and protects it from surface erosion. A geogrid 62 can be placed on the erosion mat 61, which serves as reinforcement, whereby the erosion mat 61 and geogrid 62 can be secured to the subsoil by means of the anchor head system.

Claims

1. Anchor head system (1) for securing slopes and / or terrain jumps and for securing excavations, comprising - a tension member (10) made of fiber-reinforced plastic and designed to be anchored in a borehole, - an anchor plate (20) made of fiber-reinforced plastic, with an anchor hole (21) through which an end region of the tension member (10) can be passed, and - tensioning means (30) made of fiber-reinforced plastic, which can be received on the tension member (10) in order to connect the tension member (10) and the anchor plate (20), characterized by that the tensioning means (30) comprise a tensioning sleeve (40) which can be received in the anchor hole (21) of the anchor plate (20) and wedge means (50) which are displaceable in the longitudinal direction along contact surfaces at the end region of the tension member (10) in the tensioning sleeve (40) and form a wedge connection.

2. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations according to claim 1, characterized in that the tension member (10) is designed as a lamella extending in the longitudinal direction.

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

4. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations according to claim 3, characterized in that the roughness of the contact surfaces (11) of the tension member (10) can be adjusted by coating them with a granular material.

5. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations according to one of the preceding claims, characterized in that the anchor plate (20) is disc-shaped.

6. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations according to one of the preceding claims, characterized in that the anchor plate (20) comprises a support surface (23) directed towards the ground and an opposite shaped outer surface (24), wherein the outer surface (24) comprises a number of ribs (25) extending radially towards the center.

7. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations according to one of the preceding claims, characterized in that the anchor hole bore (21) of the anchor plate (20) has a conically tapered 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 can be at least partially received in the receiving area (21a), and a through-bore (21c).

8. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations according to one of the preceding claims, characterized in that the clamping sleeve (40) comprises an inner sleeve (44) formed from a fiber-plastic compound and a fiber winding (46) that can be applied thereto.

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

10. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations according to one of the preceding claims, characterized in that the wedge means (50) comprise a first wedge (51a) and a second wedge (51b).

11. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations according to claim 10, characterized in thatthe first wedge (51a) is displaceable into a first intermediate space (42a) delimited by the tension member (10) and a region of an inner wall (41) of the clamping sleeve (40), and the second wedge (51b) is displaceable into a second intermediate space (42b) delimited by the tension member (10) and a region of the inner wall (41) of the clamping sleeve (40) along the longitudinal axis (12).

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

13. Anchor head system (1) for securing slopes and / or terrain jumps as well as for securing excavations 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 a fiber-reinforced plastic.

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