초록 ▼

A post-tensioning apparatus and method including first and second body sections interconnected by an intermediate anchor head. Each body section has an end anchor head on an end opposite the intermediate anchor head and includes a tendon with a pair of strands adapted for being tensioned between the

A post-tensioning apparatus and method including first and second body sections interconnected by an intermediate anchor head. Each body section has an end anchor head on an end opposite the intermediate anchor head and includes a tendon with a pair of strands adapted for being tensioned between the intermediate anchor head and the corresponding end anchor head of each body section. Each pair of strands is encapsulated between the intermediate anchor head and each corresponding end anchor head of each body section in a mechanically interlocked duct adapted to receive a bonding agent after tensioning of the strands. A passage is provided proximate the end anchor head of the first body section and provides a passage for insertion of bonding agent, preferably in the form of grout, into the duct of the first body section. Grout can be injected through the passage proximate the end anchor head of the first body section such that the grout can enter and fill the duct of the first body section. A tube provides a passage for grout to pass from the duct of the first body section to the duct of the second body section and around the intermediate anchor head. The ducts of both body sections can be filled with grout by passage of grout only through the passage proximate the end anchor head of the first body section and through the tube connecting the ducts of the first body section and the second body section.

대표청구항 ▼

[ What is claimed is:] [1.] A post-tensioning apparatus for a concrete structure, said apparatus comprising:(a) at least a first and second body section interconnected in series by an intermediate anchor head with each body section having an end anchor head, each body section comprising a tendon inc

[ What is claimed is:] [1.] A post-tensioning apparatus for a concrete structure, said apparatus comprising:(a) at least a first and second body section interconnected in series by an intermediate anchor head with each body section having an end anchor head, each body section comprising a tendon including a pair of strands adapted for post-tensioning between said intermediate anchor head and a corresponding end anchor head with one end of each pair of strands being connected to said intermediate anchor head and an opposite end of each pair of strands being connected to said corresponding end anchor head, each pair of strands being encapsulated between said intermediate anchor head and said corresponding end anchor head in a duct defined by one or more duct sections, each duct adapted to receive a bonding agent after post-tensioning of said pair of strands therein to bond said pair of strands in position within said duct;(b) passage means proximate said end anchor head of said first body section and providing a passage for insertion of bonding agent into said duct of said first body section; and(c) transfer means providing a passage for bonding agent in said duct of said first body section to pass past said intermediate anchor head into said duct of said second body section;(d) whereby said ducts of said body sections are fillable with bonding agent to bond said strands therein by mere passage of bonding agent through said passage means and said transfer means. [23.] A method of filling a post-tensioning apparatus for a concrete structure with a bonding agent, said method comprising the steps of:(a) providing a post-tensioning apparatus for a concrete structure comprising:(i) at least a first and second body section interconnected in series by an intermediate anchor head with each body section having an end anchor head, each body section comprising a tendon including a pair of strands consisting of a plurality of twisted wires adapted for post-tensioning between said intermediate anchor head and a corresponding end anchor head with one end of each pair of strands being connected to said intermediate anchor head and an opposite end of each pair of strands being connected to said corresponding end anchor head, each pair of strands being encapsulated between said intermediate anchor head and said corresponding end anchor head in a duct defined by one or more duct sections;(ii) passage means on at least one of said first and second body sections; and(iii) transfer means providing a passage for bonding agent in said duct of one of said first and second body sections to pass past said intermediate anchor head into said duct of the other of said first and second body sections;(b) injecting a bonding agent into said passage means to fill said duct of one of said first and second body sections and at least substantially surround said pair of strands therein; and(c) continuing to inject said bonding agent into said passage means to force said bonding agent from said duct of said one of said first and second body sections through said transfer means and into said duct of said other of said first and second body sections where said bonding agent fills said duct of said other of said first and second body sections and at least substantially surrounds said pair of strands therein.