Deep Foundation Mast Overview
Deep Foundation Mast
The deep foundation mast, or PBO Alaska cased monument, consists of a 1.25"-diameter threaded stainless
steel mast cemented or epoxied into bedrock or cement. The
height may vary; shown here
is an ~5" long mast cemented about 20" deep into bedrock. This style of
has been used throughout the EarthScope Rio Grande network in
Colorado and New Mexico, and for GGN sites FALK (Faulkland Islands) and
ABPO (Madagascar). --one vertical leg to approximately 40 ft below ground surface grouted at the bottom to rock upper 5 ft of casing in hole insulated and not grouted to allow for shallow ground movement deep bedrock AB17, AC03 (PBO Alaska Cased Monument. Modified well casing monument to depth of 60 ft in unconsolidated sand and gravel. No grout.) , and AB39.
Design and Construction
This cost is for the monumentation only; the antenna mount (e.g. SCIGN mount) is not included.
Mount Commonly Used
A SCIGN mount is required if using a SCIGN radome. If not using a SCIGN radome, a mount such as the SECO 2072-series stainless steel antenna mount is a more economical solution.
|Posted by: Beth Bartel - Fri, Jun 26, 2009 at 8:48 PM. This article has been viewed 1073 times.|
|Online URL: https://kb.unavco.org/kb/article/deep-foundation-mast-overview-420.html|