Method of reinforcing a cylindrical pipeline and prefabricated plate used in such method
AssigneeFreyssinet International (STUP)
InventorsIvica Zivanovic, Benoît Lecinq, Dominique Deschamps, Ronan Solet
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Abstract
In order to reinforce a cylindrical pipeline, in particular an underground water supply pipeline, prestressing reinforcements are placed and tensioned around it. In a zone where the pipeline has a radial projection, for example providing a manhole for access to the inside of the pipeline, the prestressing reinforcements are deflected to bypass the radial projection so that the reinforcements, located in the same layer on a side of the pipeline opposite the side having the projection, are distributed in a plurality of layers on this side having the protuberance.
Claims25
A method of reinforcing a cylindrical pipeline wherein prestressing reinforcements are placed and tensioned around the pipeline, wherein, in a zone where the pipeline has a radial projection on a first side, the prestressing reinforcements are deflected to bypass the radial projection, and wherein reinforcements located in a common layer on a second side of the pipeline opposite the first side are distributed in a plurality of layers on the first side, wherein the deflection of the reinforcements around the radial projection is obtained by means of at least one prefabricated plate having an orifice providing a passage for the radial projection and channels for guiding the reinforcements.
A method of reinforcing a cylindrical pipeline, wherein prestressing reinforcements are placed and tensioned around the pipeline, wherein in a zone where the pipeline has a radial projection on a first side, the prestressing reinforcements are deflected to bypass the radial projection, and wherein reinforcements located in a common layer on a second side of the pipeline opposite the first side are distributed in a plurality of layers on the first side, the method comprising the following steps prior to tensioning the prestressing reinforcements:
- placing a formwork in said zone of the pipeline on the first side;
- positioning spacing means within said formwork to define paths in the plurality of layers for the reinforcements;
- and
- pouring concrete into the formwork,
- the reinforcements being tensioned after the poured concrete has set.
Method of reinforcing a cylindrical pipeline, wherein prestressing members are installed and tensioned around the pipeline, the method comprising the steps of:
- selecting a section of the pipeline to receive a radial projection on a first side of the pipeline;
- and
- deflecting the prestressing members by means of at least one prefabricated plate having an orifice providing a passage for the radial projection and channels for guiding the prestressing members, to guide said members off a position of the radial projection so that the prestressing members located in a common layer on a second side of the pipe opposed to the first side are distributed into a plurality of layers on the first side.
A method of reinforcing a cylindrical pipeline, wherein prestressing members are installed and tensioned around the pipeline, the method comprising the steps of:
- selecting a section of the pipeline to receive a radial projection on a first side of the pipeline;
- and
- deflecting the prestressing members to guide said members off a position of the radial projection so that the prestressing members located in a common layer on a second side of the pipe opposed to the first side are distributed into a plurality of layers on the first side,
- the method further comprising the following steps prior to tensioning the prestressing members:
- placing a formwork in said section of the pipeline on the first side;
- positioning spacing means within said formwork to define paths in the plurality of layers for the prestressing members;
- and
- pouring concrete into the formwork,
- the prestressing members being tensioned after the poured concrete has set.
Prefabricated plate having an orifice to be placed around a radial projection on a first side of a cylindrical pipeline, and channels for guiding prestressing members for said pipeline, the channels having a shape adapted to deflect the prestressing members in order to guide said members off a position of the radial projection so that the prestressing members located in a common layer on a second side of the pipe opposed to the first side are distributed into a plurality of layers on the first side.
Dependencies are inferred from the claim text.