A concrete structure body includes a first concrete member having a first facing surface; a second concrete member having a second facing surface and disposed such that the first facing surface and the second facing surface face each other; a connection portion that fills a gap between the first facing surface and the second facing surface; and a tendon disposed in the connection portion to extend along the first facing surface and the second facing surface and to which a tensile force is applied in a longitudinal direction.

A spark absorbing system for use with a cutting torch, comprises a cap having at least one spark opening therethrough and a spark capture unit coupled to the cap and positioned to capture sparks passing through the spark opening. The spark capture unit may comprise a tube extending from the cap and may include an outlet and a flow-reduction element positioned between the cap and the outlet and/or a spark accumulator between the cap and the spark capture unit. The flow-reduction element may comprise at least one baffle, screen or mesh. The spark absorbing system may further include a spark ramp extending from the cap opposite the spark capture unit and/or a shield, which may define a cutting space between the shield and the cap.

This patent refers to improvements introduced in the encapsulation technique regarding the field of tendons with anchor plates and anchor tensors, applied in the construction system of prestressed concrete in its assembly, demoulding, tensioning and final finishing with obtaining anticorrosion protection of metal parts through a set of improved components applied to the current processes and an innovative process that will ensure the seal against entry of concrete cream into the greased system during the assembly of the system, in forms prior to concreting, which will also ensure their perpendicularity to the shape and bringing advantages that will increase the speed of installation, speed of calculation response, speed in the installation of hydraulic jacks for tensioning the pull rods, ease application and perfect fittings in the tools, improvement of the finishing process ensuring thus effective protection for durability, reuse of components, increased safety at work and elimination of all improper process that occurs in the preparation and fixing of the anchor plate and subsequent closing and finishing.

An apparatus for prestressing a concrete floor of an inclined shaft wall includes two end bearing components, a corrugated pipe, a tension bearing rod piece and two anchor heads. The tension bearing rod piece is composed of a left tension bearing rod, a right tension bearing rod, and a loading mechanism. The left tension bearing rod and the right tension bearing rod, are connected integratedly by the loading mechanism, and the tension bearing rod piece passes through the corrugated pipe. The two end bearing components are respectively arranged at the left and right ends of the tension bearing rod piece in a sleeving manner. The two anchor heads respectively lock the left and right end bearing components. Before pouring of the floor of the shaft wall, the loading apparatus is pre-buried. After the strength of floor concrete increases to certain extent, a transverse prepressing stress is applied to the floor concrete through the loading mechanism. Finally, an internal space of the loading apparatus is blocked by grouting, so as to integrate the tension bearing component, the loading apparatus and the like with the floor concrete.

A method for forming a concrete anchor may comprise the steps of providing an anchor body, at least partially encapsulating the anchor body in a sealing cover, providing at least one tubular member, engaging an end surface of the tubular member against a surface of the sealing cover so as to weld the member to the sealing cover.

A structure (30), such as a concrete structure, with a reinforcement system configured for anchoring tendons (40) for structurally reinforcing the structure (30), said reinforcement system comprising at least one tendon (40) and at least two anchorages (10), said least one tendon (40) having a first end and a second end, said first end of the at least one tendon (40) being structurally connected to the structure (30) by said at least two anchorages (10), each of said at least two anchorages (10) comprising an anchor (15), said anchors (15) being positioned successively at different positions along the length of said first end of said at least one tendon. Each of said two or more anchorages (10) comprises an anchorage block (11), in said anchorage block (11) is attached to the structure (30), and said anchorage block (11) accommodates said anchor (15).

A split wedge body, which has a curved inner surface, is formed gradually thicker from a tip portion to a terminal end portion thereof, and is made to cover the outer peripheral surface of a CFRP cable to thereby enclose the outer peripheral surface of the CFRP cable over a prescribed length thereof. A gap extending in the longitudinal direction is assured between end faces that oppose each other when a plurality of the split wedge bodies are arranged on the outer peripheral surface of the CFRP cable. The gap has an inclined portion that runs along a valley of the CFRP cable enclosed by the split wedge bodies.

An apparatus for prestressing a concrete floor of an inclined shaft wall includes two end bearing components, a corrugated pipe, a tension bearing rod piece and two anchor heads. The tension bearing rod piece is composed of a left tension bearing rod, a right tension bearing rod, and a loading mechanism. The left tension bearing rod and the right tension bearing rod, are connected integratedly by the loading mechanism, and the tension bearing rod piece passes through the corrugated pipe. The two end bearing components are respectively arranged at the left and right ends of the tension bearing rod piece in a sleeving manner. The two anchor heads respectively lock the left and right end bearing components. Before pouring of the floor of the shaft wall, the loading apparatus is pre-buried. After the strength of floor concrete increases to certain extent, a transverse prepressing stress is applied to the floor concrete through the loading mechanism. Finally, an internal space of the loading apparatus is blocked by grouting, so as to integrate the tension bearing component, the loading apparatus and the like with the floor concrete.

An anchoring device includes a barrel member which is composed of resin or mortar and has a through hole in a tapered shape, multiple wedge members which each have an outer peripheral surface having a tapered shape and slidably contacting an inner peripheral surface of the through hole and which cooperate with each other to grip a wire, and fibers as a reinforcement member extending in a circumferential direction of the barrel member to suppress the diameter expansion deformation of the barrel member.

A cover is provided for sealing a concrete anchor including a flange and a bore extending through the flange. The bore defines an axis and the flange has a first side and a second side. The cover includes a first cover portion for covering a portion of the anchor proximate the first side of the flange, a second cover portion for covering a portion of the anchor proximate the second side of the flange, and a latch coupling the first cover portion and the second cover portion together with the anchor disposed between the latch.