An evaluation method for unloading relaxation of high dam rock mass based on fusion of test and monitoring data mining
An evaluation method and monitoring data technology, applied in the field of foundation soil survey, construction, infrastructure engineering and other directions, can solve the problem of lack of clear judgment standards and errors, and achieve the effect of improving the test and evaluation system
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[0058] Evaluate the unloading relaxation of a section of high dam foundation rock mass after excavation, such as figure 2 As shown, the dam foundation of this section is rectangular, with a width of 12m and a height of 2m. Columnar jointed basalt was excavated in the upper right part, and breccia lava was exposed in the rest of the excavation. A vertical penetrating fault with a width of about 0.1m was exposed in the center. No protective layer was set during the excavation of the dam foundation section.
[0059] (1) Select point A to carry out drilling acoustic wave test. As shown in Table 6, the wave velocity at different depths of point A is obtained, and the wave velocity in deep rock mass is 5000m / s.
[0060] (2) Point A is a columnar jointed rock mass. The criterion for judging the relaxation wave velocity of columnar jointed rock mass is selected, and the relaxation depth of point A is calculated to be 1.6m.
[0061] Table 6A point wave velocity and depth
[0062] ...
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