The Design And Construction Of A Block Test In Closely Jointed Rock

摘要: The Basalt Waste Isolation Project developed a large-scale block test to investigate the in-situ deformational response of basalt rock mass. was designed and installed into vertical rib (wall) tunnel examine both in parallel perpendicular mode columns. salient challenge confronting design development lack documented experience for testing wall. Information available horizontal surface. major tasks involved implementation this included flat-jack slot drilling, instrumentation hole cable anchor installation, monitoring installation. Drilling closely jointed fractured mass required extreme care prevent unraveling columnar structure minimize disturbance section be tested. adaptation high-strength system space limitations configuration an optical deformation device capable achieving measurement precision 30 ..mu..m equal innovation. Construction facility successfully completed on schedule approx. 25 wk.