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US 2018/0080315 A1Published application
Drilling method, method for performing a pressure meter test, and corresponding assembly
AssigneeCalyf
InventorFrancis Cour
Life of this patent
Estimating the term…
Abstract
A method for drilling into the ground includes digging a longitudinal hole in the ground, and simultaneously lining the hole with a tube extending substantially over an entire longitudinal length of the hole. The tube includes an inner tube and an outer tubular sheath inserted between the inner tube and a wall of the hole. After digging the hole, the inner tube is removed from the hole, with the outer sheath remaining in place inside the hole.
Claims15
A method for carrying out a pressuremeter test, the method comprising:
- a step for digging a longitudinal hole in the ground, and simultaneously lining the hole with a tube extending substantially over an entire longitudinal length of the hole, the tube comprising an inner tube and an outer tubular sheath inserted between the inner tube and a wall of the hole,
- after the step of digging the hole, a raising step during which the inner tube is removed from the hole, the outer sheath remaining in place inside the hole;
- wherein the method comprises:
- a step for inserting a pressuremeter probe into the outer sheath;
- a measuring step during which a deformable cell of the pressuremeter probe is inflated by a fluid, the cell radially stressing the outer sheath against the wall of the hole.
2 more elements
An assembly for carrying out a pressuremeter test, the assembly comprising:
- a digging device, comprising a tool for drilling a longitudinal hole in the ground;
- a tube suitable for extending substantially over an entire longitudinal length of the hole, the tube comprising an inner tube and an outer tubular sheath inserted between the inner tube and a wall of the hole;
- a device for placing the tube in the hole simultaneously with the digging;
- a device for removing, after digging the hole, the inner tube from the hole, the outer sheath remaining in place inside the hole;
- a pressuremeter probe able to be inserted into the outer sheath, including a deformable cell;
- a device provided to inflate the deformable cell using a fluid, such that the deformable cell radially stresses the outer sheath against the wall of the hole.
3 more elements
Dependencies are inferred from the claim text.