Micropile foundation matrix

摘要

The disclosure describes, in part, apparatuses and methods for installing structures (e.g., foundations, footings, anchors, abutments, etc.) at work sites, such as difficult-access work sites. In some instances, a rotating drill assembly is assembled over a target location in order to excavate a radial array of batter-angled shafts associated with the target location in preparation for the installation of a radial array of micropiles. An operator utilizes the rotating drill in combination with a foundation pile schedule/decision matrix to design and install the radial array of batter-angled micropiles. This disclosure also describes techniques for designing, fabricating and installing structural caps to be coupled to the installed radial array batter angled micropiles. These structural caps are lightweight and, thus, more portable to difficult-access sites where they are coupled to the micropiles forming a foundation for structure to be installed at the difficult-access site.

主权项

1. A method for installing a pile group at a site, the method comprising:
at a time of installation of a first pile of the pile group at the site,
positioning a drill assembly to the first pile of the pile group at the site;performing, using the drill assembly, an in-situ penetration test to determine a geotechnical characteristic of a stratum at a point of characterization in the first pile location of the pile group, wherein the point of characterization comprises a distance in the ground below a pile cap excavation at the site;at least partly subsequent to the performing of the in-situ penetration test, determining a quantity of piles to include in the pile group based on the determined geotechnical characteristic of the stratum at the point of characterization in the first pile location, wherein the determining of the quantity of piles at the time of installation of the first pile of the pile group at the site comprises mapping, via a predefined mapping, the determined geotechnical characteristic of the stratum to one of multiple defined soil conditions, and wherein the determined quantity of piles is based at least in part on the one defined soil condition; andinitiating, using the drill assembly, installation of the determined quantity of piles.