| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 88 === Centrifuge acceleration simulate tunnel dig to lead to ground settlement measure were put linear variable differential transformer to proper position for measure ground settlement. But it is limited centrifuge just provide eight channel and supply more linear variable differential transformer maybe affect ground settlement. So, it can’t provide enough data to show ground 3D settlement flume that centrifuge.
In this study, it that close range photommetric divide two parts. First, the inner orientation and exterior orientation parameters calculated of C.C.D. Method were used total station theodolite measured direction angle and zenith distance and make fore intersection method to get control point’s 3D coordinate, then used space resection to obtain C.C.D inner orientation and exterior orientation parameters. Second, centrifuge acceleration simulated tunnel dig to lead to ground settlement measure. Sample is vietnam yam sand, relative density were 35.6%, unit weight were 1.4554g/cm3. Two black and white C.C.D to gain image then paint ship pro to estimate image coordinate and to carry relative orientation, space resection compute. Last to make stanford graphics drawing ground settlement 3D coordinate map.
In this study results, photommetric can got ground settlement 3D deformation and drawing ground settlement flume curvature plane.
When bolster up air pressure from 0.66Kg/cm2 down to 0.260.66Kg/cm2, ground have expand phenomenon. It is possible grains each other squeeze result to mark rise and produce expand phenomenon
|
|---|
