Method for installing reinforcements around a cylindrical underground pipeline
First Claim
1. A method of reinforcing a cylindrical underground pipeline, comprising the steps of:
- laying an excavation coffer on the ground above the pipeline, front and rear faces of the coffer being placed transversely to the pipeline, each of said front and rear faces having along a lower edge thereof an indentation of a shape adapted to a cylindrical shape of the pipeline;
driving the coffer into the ground substantially until said indentations are brought up against the pipeline, and removing soil material between the front and rear faces of the coffer to provide access to an upper part of a wall of the pipeline;
further removing soil material under the pipeline from the inside of the coffer; and
installing at least one reinforcement around the pipeline in an interval between the front and rear faces of the coffer.
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Accused Products
Abstract
In order to install a reinforcement around a cylindrical underground pipeline, an excavation coffer is laid on the ground above the pipeline, at the same time placing transversely to the pipeline front and rear faces of the coffer, each having along its lower edge an indentation of a shape adapted to the cylindrical shape of the cylindrical pipeline, the coffer is buried in the ground substantially until the indentations are brought up against the pipeline, soil material is removed between the front and rear faces of the coffer in order to give access to an upper part of the wall of the pipeline, a duct in the form of an arc of a circle is engaged under the pipeline, at the same time being pushed along the lower part of the wall of the pipeline, a prestressing reinforcement is threaded into this duct, and the armature is clamped and anchored around the pipeline.
17 Citations
23 Claims
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1. A method of reinforcing a cylindrical underground pipeline, comprising the steps of:
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laying an excavation coffer on the ground above the pipeline, front and rear faces of the coffer being placed transversely to the pipeline, each of said front and rear faces having along a lower edge thereof an indentation of a shape adapted to a cylindrical shape of the pipeline;
driving the coffer into the ground substantially until said indentations are brought up against the pipeline, and removing soil material between the front and rear faces of the coffer to provide access to an upper part of a wall of the pipeline;
further removing soil material under the pipeline from the inside of the coffer; and
installing at least one reinforcement around the pipeline in an interval between the front and rear faces of the coffer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of repairing a cylindrical underground pipeline for the supply of fluid under pressure, which comprises installing reinforcements around different sections of the pipeline, wherein the installation of at least one reinforcement around a pipeline section comprises the steps of:
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laying an excavation coffer on the ground above the pipeline section, front and rear faces of the coffer being placed transversely to the pipeline section, each of said front and rear faces having along a lower edge thereof an indentation of a shape adapted to a cylindrical shape of the pipeline;
driving the coffer into the ground substantially until said indentations are brought up against the pipeline section, and removing soil material between the front and rear faces of the coffer to provide access to an upper part of a wall of the pipeline section;
further removing soil material under the pipeline section from the inside of the coffer; and
installing at least one reinforcement around the pipeline section in an interval between the front and rear faces of the coffer. - View Dependent Claims (20, 21, 22, 23)
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Specification