Johan Funehag
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View article: Drill Monitoring for Rock Mass Grouting: Case Study at the Stockholm Bypass
Drill Monitoring for Rock Mass Grouting: Case Study at the Stockholm Bypass Open
In tunneling, rock mass grouting is a method applied to reduce water ingress. Grouting is influenced by rock mass conditions, especially apertures, frequency, and continuation of fracturing. These rock mass conditions can partly be determi…
View article: Rock support prediction based on measurement while drilling technology
Rock support prediction based on measurement while drilling technology Open
In tunnelling, rock mass support is designed based on the observed rock mass conditions. These conditions are determined by rock mass characterization. Measurement while drilling (MWD), one such characterization method, acquires drill para…
View article: Improved filtering and normalizing of Measurement-While-Drilling (MWD) data in tunnel excavation
Improved filtering and normalizing of Measurement-While-Drilling (MWD) data in tunnel excavation Open
Measurement-While-Drilling (MWD) data are complex because of the drilling process and drilling system. Swift and accurate normalization and filtration processes are required if MWD data are to be used for rock mass characterization. The cu…
View article: Swedish grouting design: hydraulic testing and grout selection
Swedish grouting design: hydraulic testing and grout selection Open
To ensure successful sealing of rock and soil, an adequate description of the system to be grouted is required as a basis for the grouting design and the selection of the grouting material. In rock, the individual fractures and the hydraul…