TRENCH FASTENING FOR REPAIR WORKS ON PIPELINE Russian patent published in 2024 - IPC E02D17/08 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction or repair of pipelines and other utilities located under the ground, in particular for reinforcement of walls of trenches dug in the ground, when repairing pipelines (including main and field oil and gas pipelines) in conditions of looseness and buoyancy of unstable soils, also in conditions when there is no possibility of digging trenches using the dump method. Trench fastening for repair works on pipeline includes enclosing external shields and internal braces. Shields are made in the form of a grid with cells, excluding the penetration inside the suspended masses of the soil attachment with a value that allows to cause damage to the worker, and braces are in form of U-shaped transverse structures made of paired rods of two vertical and upper horizontal elements. Internal rods of vertical elements are located at distance of 5–10 % more than the diameter of the pipeline, and external ones – by 3–7 % less than the width of the dug trench. Lower rod of the horizontal element is installed at a height of not less than the diameter of the pipeline and not less than 1.2 m, and the upper rod is installed at a distance of not less than 0.25 m from the lower rod and not lower than the height of the trench. U-shaped structures are fixed from above and from below by external longitudinal plates at distance of 1–1.5 m, besides, the plates are made with possibility of attachment to them outside the shields.

EFFECT: provision of reliable protection of the worker due to non-separable braces inside the guard shields.

1 cl, 1 dwg