ERRORS OF THE PLOTTING OF GEOLOGICAL BOUNDARIES ON ENGINEERING-STRATIGRAPHIC COLUMNS BY DRILLING DATA

Rok vydání:	2017
Předmět:	Engineering drawing Observational error Boundary location Borehole Range (statistics) Geodetic datum Drilling Point (geometry) Geodesy Random variable Geology
Zdroj:	Engineering survey. :22-27
ISSN:	2587-8255 1997-8650
DOI:	10.25296/1997-8650-2017-5-22-27
Popis:	Engineering-geological boundaries on geological crosssections serve as the basis for the design of underground parts of structures. Errors of the plotting of engineering-geological boundaries on geological cross-sections are made up of errors of the determination of geological boundaries at drilling points, and of errors of the construction of cross-sections according with engineering-stratigraphic columns by drilling data. This paper presents a classification of errors of the determination of a geological boundary location at a drilling point. Geodetic errors of well site locations are estimated. The general errors of the determination of absolute altitudes of geological boundaries were calculated according to the addition law of random variables for a number of drilling methods. They turned out to be within a range of plus or minus 0.2–0.7 m. This erroris approximately plus or minus 0,3 m for the most common drilling methods.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::80ab336b1233f8a44aa4b0918c62645f https://doi.org/10.25296/1997-8650-2017-5-22-27 Zobrazit plný text záznamu