Prestressing system device of concrete structure and uses of the device

Abstract

The invention disclose the concrete structure prestressed system device and preparing method. The two ends of steel wires is connected with one level anchorage, anchor bearing plate is connected with screwed tendon, one-level anchor is connected with second level anchor in series, second level anchor is connected with anchor bearing plate, the other end of it is connected with formed pipe, and in formed pipe intracavity there is damping device, steel wires and air cavity. The method comprises the following steps: the surface of formed pipe and steel wires carrying out antiaging treatment, steel wires threading formed pipe and anchor bearing plate cave, fixing the one-level and second level anchor and anchor bearing plate, opening the two sides of one-level and second level anchor, stretching the steel wires with jack, when stretching to design stress, locking one-level anchor, jack oil returning; locking second level anchor; inflating to air cavity, not squeezing prestressed pipe. The device has the advantages of simple structure, easy construction, low cost, wide application and good social and economy benefit.

Description

technical field [0001] The invention relates to a concrete prestressing system in civil engineering, and is especially suitable for the device and the application of the device of the prestressing system in the concrete structure. Background technique [0002] From the completion of the first Walmart Bridge over the Rhine with a span of 100 meters in the 1950s to the end of the 20th century, the span of prestressed concrete has exceeded 300m. At present, more than 80% of the bridges in the world use prestressed concrete structures. In 1956, China built the first 23.9m prestressed concrete railway simply supported bridge; West Liuzhou Bridge; the 144m Fuzhou Wulong River Bridge and the 184m Chongqing Yangtze River Bridge; the Panyu Luoxi Bridge with a main span of 180m built in Guangdong from the late 1980s to the early 1990s; the Humen auxiliary channel bridge with a main span of 280m built in 1998. It is the largest span in the world. As concrete structures are affected b...

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Problems solved by technology

[0009] The purpose of the present invention is to provide a method to solve the problem that the current grouting is not full, and at the same time overcome the problem of accelerated corrosion of prestressed tendons caused by grouting, and solve the problems that prestressed tendons cannot be replaced and stress detected due to grouting. Device for prestressing system of concrete structure

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