Transportation, Department Of- Federal Highway Administration- 690567 Western Federal Lands Div
Western Federal Lands Highway Division ( WFLHD) Geotechnical Drilling Services BPA - Western Federal Lands Highway Division ( WFLHD) intends to solicit and award multiple Blanket Purchase Agreement( BPA) for Geotechnical Drilling Services. These services include, but are not limited to, the drilling of geotechnical borings, installi
6 m very widely spaced 6 to 20 feet 2 to 6 m widely spaced 2 to 6 feet 600 mm to 2 m moderately spaced 8 inches to 2 feet 200 to 600 mm closely spaced 2 to 8 inches 60 to 200 mm very closely spaced 34 to 2 inches 20 to 60 mm extremely closely spaced r2. slightly rough surface, separation greater than 0. 04 inches 1 mm, soft fair condition discontinuity wall × mechanical breaks caused by drilling or handling and lengths of core that are not sound shouldnot be included in the rqd calculation. in addition, vertical fractures in the core should not beincluded in the rqd calculation. an example for measuring rqd is presented in exhibit 3. 5a. it provides the hole logger with a good example for measuring and calculating rqd. 15flh rock characterization guidelines december 2017 exhibit 3. 5a measuring rqd deere, **** fracture frequencyfracture frequency ff is defined as the number of natural fractures per unit length of corerecovered. the fracture frequency is measured for each core run, and recorded on the fiel
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