Possibilities of improving exactness of engineering-geology research results by the monitoring of the driving process

• Main Authors: Krúpa Víazoslav, Lazarová Edita
• Format: Article
• Language: English
• Published: Technical University of Kosice 2000-09-01
• Series: Acta Montanistica Slovaca
• Subjects: precise exploration by driving the exploratory gallery; full profile driving; electronic geomechanical monitoring
• Online Access: http://actamont.tuke.sk/pdf/2000/n3/3krupalaz.pdf

In detail engineering-geology, hydrology and geotechnical research at driving a part of exploration gallery Branisko was fulfilled by results of computer application for the computing monitoring information of TBM driving process according to different viewpoints. A high density of the gathered information made it possible to determine a methodics for the classification of strength rock mass properties, to identify the influence of the rock mass damage and to apply some methods of rock classification. In the article are presented some results of the RQD coefficient determination, coefficient of burden by Terzags and the rock classification according to Protodjakonov. For each geologic entirety defined by the research, achieved results are compared with the engineering-geology research results. In the contribution, in a table form are elaborated values of four methods of determination: the RQD coefficient, the rock burden coefficient, and the Terzaghys and Protodjakonov methods of rock classification. For the 42 geologic sections of the total length of 2340m that was driven by a full profile driving machine Wirth TB-II-330H/M (geologic sections were defined by in detail geological, engineering geological, hydrological and geotechnical exploration elaborated by employees of INGEO, a.s., ilina), and were compared to the results of the rock categorization according to the classification classes defined by Deere, Terzaghi and Protodjakonov. The classification of the rocks into categories was based on the arithmetic average of defined values. The values of deviation or dispersion or coefficient of variation were not considered. From the graphical result presentation of the methods for the chosen 500 m section of the exploratory gallery of the motorway tunnel Branisko (that are presented by the values gained from the computer monitoring process), it results, that in geological units it is possible to determine local changes of rock properties. These local changes during detailed statistics elaboration are shown by the amount of dispersion.