Abstract: A tension member protection system includes two or more shell elements arranged circumferentially around a tension member which together surround a cavity that receives the tension member. A plurality of joining sleeves, each of which is associated with one of the two shell elements, is designed and arranged on the shell elements in such a way that, in a cavity forming state, they interlock so that their through-holes in the longitudinal direction of the tension member protection system only overlap completely when the two shell elements lie with their contact surfaces against other. A rod-shaped element is designed to be passed through the through-holes of the interlocking joining sleeves.

Abstract: A corrosion-protected tension member (10) comprises a plurality of tension elements (14) and an anchor device (44) with an anchor element (16) which is designed to transmit tension forces from the tension elements (14) to a superior structure (12), at least one elastically compressible sealing disc (28), and a supporting device (26) which is arranged on that side of the at least one sealing disc (28) which faces away from the anchor element (16). According to the invention, when the tension member (10) is in a state in which it is preassembled but not yet placed under tensile stress, at least one plastically deformable disc (30) of corrosion protection material is arranged between the anchor element (16) and the at least one sealing disc (28).

Abstract: The invention relates to an elongate tensioning unit comprising a casing which encloses an interior space, and a plurality of tensioning elements which extend in the longitudinal direction of the tensioning unit and are accommodated in the interior space of the casing. According to the invention, the casing comprises, at, at least one circumferential position, a depression which projects into the interior space and in which at least one electric functional unit, for example at least one lighting unit, and at least one connection line for the at least one electric functional unit are accommodated. Alternatively, the at least one electric functional unit can also be accommodated in an associated recess in a water-repelling element arranged on the outer surface of the casing.

Abstract: A method for installing a prestressing element in an anchor block, in which the prestressing element is attached to a holder, includes the holder being moved to the anchor block, the prestressing element being introduced into a through-opening of the anchor block, and the prestressing element being fixed to the anchor block. The holder can be attached to the prestressing element at a distance which is selected so that the length of the projection of the prestressing element on the side of the holder facing the anchor block is greater than the length of a portion of the prestressing element, which is required for introducing the prestressing element into the through-opening and fixing the prestressing element to the anchor block.

Abstract: An apparatus is configured to de-ice a surface of a casing tube of a tendon that is exposed to weather influences, or to guard the case tube against ice forming on the case tube, where the tendon is anchored to a structure by an anchoring device. The apparatus includes a power device, one end of which is directly or indirectly in force transmitting engagement with the anchoring device and the other end is directly or indirectly in force transmitting engagement with the casing tube. The power device is configured to move the casing tube relative to the anchoring device in the circumferential, radial and/or axial direction in relation to the longitudinal extension direction of the casing tube.

Abstract: The invention relates to an elongate tensioning unit (100) comprising a casing (102) which encloses an interior space (104), and a plurality of tensioning elements (106) which extend in the longitudinal direction (A) of the tensioning unit (100) and are accommodated in the interior space (104) of the casing (102). According to the invention, the casing (102) comprises, at at least one circumferential position, a depression (108) which projects into the interior space (104) and in which at least one electric functional unit (112), for example at least one lighting unit, and at least one connection line (114a, 114b) for the at least one electric functional unit (112) are accommodated. Alternatively, the at least one electric functional unit can also be accommodated in an associated recess in a water-repelling element arranged on the outer surface of the casing.

Abstract: A strand pressure-pipe anchor comprises a compression anchor base element, a tension strand or a plurality of tension strands, and at least one sheath, in which the tension strand or at least one of the tension strands is received. The tension strand or at least one of the tension strands is provided, at the end thereof associated with the compression anchor base element, with a crimp sleeve, which is provided with an external thread, which, in a connected state of the tension strand and the compression anchor base element where the tension strand is connected to the compression anchor base element to pass on the anchoring forces to the surrounding substratum, is in screw engagement with an internal thread of the compression anchor base element.

Abstract: A protective system having a protective device for tension members for collecting ice accumulations detaching from a tension member that is anchored on the structure in a first abutment and in a second abutment. The tension member is exposed to climatic conditions by the section running between the abutments. To guarantee protection from falling ice accumulations, the protective device has a hose-shaped envelope, which surrounds the tension member on the circumferential side. The hose-shaped envelope is disposed on a partial longitudinal section of the tension member in an axially compressed or folded manner in a first operating position, and is movable, with the aid of a drive system, to a second operating position, in which the hose-shaped envelope extends over the length of the tension member in the stretched state.

Abstract: An arrangement for supporting a brace transversely to the longitudinal extent thereof in the vicinity of the anchorage of a structure having a cavity pipe, an adapter ring, a tubular or annular supporting element which has a second axially loadable support surface, which is arranged concentrically in relation to the second axially loadable bearing surface of the adapter ring and of which the opening, which encircles a third longitudinal axis, forms a supporting surface for the brace by way of its inner circumference, wherein the opening has an amount of eccentricity E2 in relation to the second axially loadable support surface of the supporting element, and having a fastenor which clamps the cavity pipe, the adapter ring and the supporting element together axially in position relative to one another.

Abstract: An arrangement for supporting a brace transversely to the longitudinal extent thereof in the vicinity of the anchorage of a structure having a cavity pipe, an adapter ring, a tubular or annular supporting element which has a second axially loadable support surface, which is arranged concentrically in relation to the second axially loadable bearing surface of the adapter ring and of which the opening, which encircles a third longitudinal axis, forms a supporting surface for the brace by way of its inner circumference, wherein the opening has an amount of eccentricity E2 in relation to the second axially loadable support surface of the supporting element, and having a fastenor which clamps the cavity pipe, the adapter ring and the supporting element together axially in position relative to one another.

Abstract: A device and a method for controlling a clamping press is provided when clamping a tension member as a function of the clamping force of a reference clamping member. The device has a hollow, cylindrical housing, wherein a piston coupled to the reference tension member is supported longitudinally displaceably along an axis. The housing and the piston encompass a pressure chamber that can be acted upon by a pressure medium for performing an axial stroke motion of the piston against the clamping force of the reference tension member by an inlet, and that can be connected by an outlet to the clamping press. The device further comprises a valve unit for controlling the application of the pressure medium to the clamping press, wherein the valve unit can be directly controlled by the stroke motion of the piston.

Abstract: In a two-part drilling tool for the percussive or rotary percussive drilling of holes in soil material or rock material, including a drill head (1) and an adapter part (7), which is fixed in an interior of the drill head (1) by way of interacting, complementary threads (11, 14) and is intended for providing the coupling to a drill string, wherein an end face (3) of the drill head (1) that is remote from a borehole interior rests on a complementarily formed stop or support surface of the adapter part (7), the end face (3) of the drill head (1) that is remote from the borehole interior and the stop or support surface of the adapter part (7) interacting therewith comprise complementarily formed wedge-shaped surfaces (4, 6) with end teeth (5, 8), and a lead angle (?1) of the wedge-shaped surfaces (4, 6) is smaller than a lead angle (?2) of an internal thread of the drill head (1) or the external thread interacting therewith of the adapter part (7) or of the drill string.

Abstract: A corrosion-protected, self-drilling anchor and an anchor subunit and to a method for the production thereof is provided. A self-drilling anchor of the invention includes a number of anchor subunits, each with a hollow bar element, which are connected together by the formation of an axial bell butt joint to form a connected pull and pressure member. The first subunit t its end has a drill bit and the subunit is connected non-rotatably with its end to a drilling and injection device. It is provided according to the invention that each hollow bar element is surrounded by a sheathing except for its end sections and the annular gap between the sheathing and hollow bar element is grouted with a first corrosion protection compound. A coupler in the area of the bell butt joint fits tightly against the sheathings of the two hollow bar elements which are part of the bell butt joint. The hollow space between the coupler and hollow bar elements is filled with a second corrosion protection compound.

Abstract: A ground anchor or rock anchor is provided that includes an anchor tension member composed of one or more individual elements, such as steel bars, steel wires, or steel wire strands. While the anchor tension member is intended to be introduced into a drilled hole and anchored there, the anchoring of the anchor tension member at the exposed end of the drilled hole is achieved with the aid of anchor head. To this end, the anchor head comprises a support element to bear directly or indirectly against the underlying rock or substratum, and an anchoring component for tensioning the individual elements, which can be brought into a frictional connection with the individual elements while bearing against the support element. In addition, a cap, which extends around the anchoring component and the ends of the individual elements, protects the exposed end of the anchor head.

Abstract: A tension member is provided for structures, in particular a cable stay for a cable-stayed bridge, in which one or more tension elements, such as steel rods, steel wires, or stranded steel wires, run inside a tubular sheath. The tension elements fill only a portion of the cross-section of the tubular sheath, so that a remaining unoccupied area is left. In order to prevent the tension elements from moving in the transverse direction with respect to the tension member, there is arranged in the remaining unoccupied area of the tubular sheath a filler body that extends over a limited longitudinal section of the tension member and includes a deformable sheath, which tightly encloses a hollow space that is delimited on all sides and can be filled with a filler medium.

Abstract: A method and apparatus for tensioning a staggered anchorage comprised of a plurality of tension members, which are anchored in a bore hole at various depths, thus having different free steel lengths. For each staggered anchorage, each tension member is tensioned up to a predetermined maximal load and is then subsequently adjusted to the working load. To achieve a consistent elongation reserve of the individual tension member and thus to increase the security of a staggered anchorage, the staggered anchorage is adjusted to the working load, all tension members are adjusted to a reduced elongation (?Iw) by a uniform elongation difference (?Imax??Iw) relative to the respective elongation (?Imax) of the predetermined maximal load. An arrangement for performing the method has a single tensioning plane, which is force interconnected with defined locking elements that are arranged on tension members in clamping planes.

Abstract: A corrosion-resistant tension member, particularly an inclined cable of a cable stayed bridge, is comprised of a bundle of individual elements, for example, steel wire strands, which in the open area is encapsulated by sheathing, and which in the area of a rerouting point, for example, at the pylon of a cable-stayed bridge, extends inside a saddle pipe in a canal having the shape of a circular arc. In order to avoid impairments at the ends of the saddle pipe when sheathing is connected to the structure, the saddle pipe is extended in the shape of a circular arc beyond a tangential exit of the bundle by a length L so that the bundle is exposed at an end of the saddle pipe without any risk of abutting.

Abstract: A corrosion-resistant tension member, particularly an inclined cable of a cable stayed bridge, is comprised of a bundle of individual elements, for example, steel wire strands, which in its open area is encapsulated by sheathing, and which within the structure extends inside a guide canal that is formed by a recess pipe. The sheathing—sealing off the front side of the guide canal—is thereby directly or indirectly connected to the structure. Between the sheathing and the entrance point of the tension member into the structure, a connecting pipe is arranged, which on the one hand is detachably connected to the sheathing and on the other hand is connected to the structure by a flange plate.

Abstract: An anchoring device for a corrosion-protected tension member includes an anchor body, which is provided with bores for the passage of the tension elements. Sealing discs, which can be compressed by means of a pressure plate and threaded bolts, are provided on a face of the anchor body and lie opposite a downstream face. A perforated disc, which is enclosed by two supporting discs, is located downstream of the sealing discs and the pressure plate. The perforated disc acts as a spacer for the tension elements and is fixed between lugs that are opposite an anchor tube and that is connected to the anchor body. The locking of the perforated disc enables the position of the tension elements to remain parallel, even when the sealing discs are compressed to activate the seal. If individual tension elements have to be replaced, the loosening of the threaded bolts allows the sealing discs to “breathe” and to return to their original position.

Abstract: A corrosion-resistant tension member, particularly a tendon for prestressed concrete, comprising a bundle of tension elements arranged inside a sheathing, has at its ends anchoring devices each with an anchor plate. On the side of the anchor plate facing away from the open air side, a seal having tension elements running through it and having a sealing plate are arranged, the sealing plate being fixed in place on the side facing away from the anchor plate opposite the anchor body against longitudinal displacement. Between the anchor plate and a pressure plate butting against the sealing plate, pressure-transferring means, for example, a pressure tube, are provided, having a length calculated in such a way that a longitudinal displacement of the anchor plate that occurs when the tension elements are being tensioned, actuates the exertion of surface pressure to the sealing plate for activating the seal.