攝影測量在離心模擬試驗之應用-以離心隧道模型之地表沉陷量量測為例

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Title:	攝影測量在離心模擬試驗之應用-以離心隧道模型之地表沉陷量量測為例
Authors:	許銘峰;Ming-Feng Hsu
Contributors:	土木工程研究所
Keywords:	近景攝影測量;離心模擬隧道;膨脹;前方交會;空間前方交會;空間後方交會;相對方位;close rang photommetric;centrifuge acceleration similating tunnel;expansion;fore intersection method;space intersection;space resection;relative orientation
Date:	2000-07-18
Issue Date:	2009-09-18 17:06:48 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	在離心模擬隧道開挖導致地表沉陷量測上，於適當位置放置位移計量測地表沉陷量，但受限於離心機本身只能提供八個頻道且放置過多位移計時，可能會影響地表沉陷的變形型態，故於離心模擬隧道開挖導致地表三維沈陷之量測上，無法提供足夠的資料來表示地表三維沉陷槽型態。本研究屬近景測量，可分為兩部份，第一為C.C.D內、外方位參數計算，做法為使用經緯儀量測控制點之方向角、天頂距，使用三角測量之前方交會得其三維座標，再利用空間後方交會法求得C.C.D內、外方位參數值；第二為進行離心模擬隧道開挖所導致地表沉陷量之量測，利用越南硯砂，製作相對密度36%、單位重1.4554g/cm3之試體，使用二支黑白C.C.D負責影像擷取，最後量測影像座標點，進行相對方位與空間前方交會計算，最後使用stanford graphics繪得地表沉陷三維座標沉陷圖。由研究結果顯示，攝影測量之技術可得地表沉陷之三維變形，繪得地表沉陷槽曲面，在支撐氣壓於0.66Kg/cm2降至0.26Kg/cm2時，地表有膨脹之現象，原因可能是顆粒間相互推擠導致標的點被往上抬起，產生膨脹情形。 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
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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