Equipment and method for constructing micropiles in soil, in...

Details Equipment and method for constructing micropiles in soil, in... Equipment and method for constructing micropiles in soil, in...

2010-12-03

2011-11-29

Bagnell, David (Department: 3672)

Hydraulic and earth engineering

Foundation

Columnar structure

C405S231000, C405S233000, C405S239000, C405S244000

Reexamination Certificate

active

08066452

ABSTRACT:
An equipment for constructing micropiles in soil, includes a drilling rod with a bit with at least one nozzle jetting fluid forward, and at least one nozzle jetting fluid substantially orthogonal; an element pulling a protective tube, not adhering to the rod. A corresponding method includes drilling with a drilling rod jetting liquid in front of the bit until reaching stable soil strata; drilling and injecting high-pressure grout with one or more lateral nozzles, while the drilling rod rotates; pulling the protective tube, the tube being inserted to the area of grout injection; when the required depth is reached, the proximal end of the drilling rod is anchored to a plate; when the grout is consolidated, traction is applied to the drilling rod if necessary. Grout is injected into the protective tube.

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