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| 講演名 | 2013-11-22 16:45 地盤沈下の3次元解析 ～ GPR-sliceとArcGISの比較 ～ ○Donald M.Thieme（VSU）・Benjamin Davis（FSU）・Can Denizman（VSU）  SANE2013-65 |
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| 抄録 | （和） | Subsurface anomalies related to subsidence of the ground beneath a house in south Georgia, USA were identified using a MAL?M 100 MHz GPR System on a 28 m x 51 m grid. Areas of both active and inactive subsidence ranging from 10 m2 to 25 m2 in size were evident as depressions on the land surface and in many of the GPR profiles. After minimal processing with RadExplorerTM to correct for time zero, remove DC electrical noise, and gain signal with depth, we cut ?time-slices? through the entire grid of 28 profiles using GPR-SliceTM. Twenty slices with a thickness of 11.5 ns were cut from the data collected between 23 and 192 ns. The results showed the areas of subsidence to be bounded by stable ground with a low dielectric constant. Although ?ringing? in some of the anomaly locations distorted their appearance at depth, features originating at approximately 100 cm below surface could be clearly defined in spite of some attenuation by overlying clayey soil. A ?top of rock? model was created using Arc-GISTM after picking a reflection from each GPR profile where the karst depressions were best defined. Attenuation by the overlying clayey soil created a corrugated appearance to the Arc-GISTM model although the ringing effects were removed. A spline function provided the most realistic model for contouring values between centroids picked from the GPR profiles. |
| （英） | Subsurface anomalies related to subsidence of the ground beneath a house in south Georgia, USA were identified using a MAL?M 100 MHz GPR System on a 28 m x 51 m grid. Areas of both active and inactive subsidence ranging from 10 m2 to 25 m2 in size were evident as depressions on the land surface and in many of the GPR profiles. After minimal processing with RadExplorerTM to correct for time zero, remove DC electrical noise, and gain signal with depth, we cut ?time-slices? through the entire grid of 28 profiles using GPR-SliceTM. Twenty slices with a thickness of 11.5 ns were cut from the data collected between 23 and 192 ns. The results showed the areas of subsidence to be bounded by stable ground with a low dielectric constant. Although ?ringing? in some of the anomaly locations distorted their appearance at depth, features originating at approximately 100 cm below surface could be clearly defined in spite of some attenuation by overlying clayey soil. A ?top of rock? model was created using Arc-GISTM after picking a reflection from each GPR profile where the karst depressions were best defined. Attenuation by the overlying clayey soil created a corrugated appearance to the Arc-GISTM model although the ringing effects were removed. A spline function provided the most realistic model for contouring values between centroids picked from the GPR profiles. | |
| キーワード | （和） | GPR / Subsidence / Soil / Sinkhole / GIS / Karst / Hazard / |
| （英） | GPR / Subsidence / Soil / Sinkhole / GIS / Karst / Hazard / | |
| 文献情報 | 信学技報, vol. 113, no. 309, SANE2013-65, pp. 67-71, 2013年11月. | |
| 資料番号 | SANE2013-65 | |
| 発行日 | 2013-11-15 (SANE) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | SANE2013-65 |
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| 研究会情報 | |
| 研究会 | SANE |
| 開催期間 | 2013-11-22 - 2013-11-23 |
| 開催地（和） | 東北大学 川内萩ホール（22日）、東北アジア研究センター（23日） |
| 開催地（英） | Hagi-hall(22), C for Northeast Asian Sudies(23), Tohoku University |
| テーマ（和） | 第12回 地下電磁計測ワークショップ「復興・遺跡調査」 |
| テーマ（英） | The 12th workshop on subsurface electromagnetic measurement |
| 講演論文情報の詳細 | |
| 申込み研究会 | SANE |
| 会議コード | 2013-11-SANE |
| 本文の言語 | 英語（日本語タイトルあり） |
| タイトル（和） | 地盤沈下の3次元解析 |
| サブタイトル（和） | GPR-sliceとArcGISの比較 |
| タイトル（英） | Three-dimensional analysis of subsiding ground |
| サブタイトル（英） | A comparison of results using GPR-Slice and ArcGIS |
| キーワード(1)（和/英） | GPR / GPR |
| キーワード(2)（和/英） | Subsidence / Subsidence |
| キーワード(3)（和/英） | Soil / Soil |
| キーワード(4)（和/英） | Sinkhole / Sinkhole |
| キーワード(5)（和/英） | GIS / GIS |
| キーワード(6)（和/英） | Karst / Karst |
| キーワード(7)（和/英） | Hazard / Hazard |
| キーワード(8)（和/英） | / |
| 第1著者 氏名（和/英/ヨミ） | Donald M.Thieme / Donald M.Thieme / |
| 第1著者 所属（和/英） | Valdosta State University (略称： VSU) Valdosta State University (略称： VSU) |
| 第2著者 氏名（和/英/ヨミ） | Benjamin Davis / Benjamin Davis / |
| 第2著者 所属（和/英） | Florida State University (略称： FSU) Florida State University (略称： FSU) |
| 第3著者 氏名（和/英/ヨミ） | Can Denizman / Can Denizman / |
| 第3著者 所属（和/英） | Valdosta State University (略称： VSU) Valdosta State University (略称： VSU) |
| 講演者 | 第1著者 |
| 発表日時 | 2013-11-22 16:45:00 |
| 発表時間 | 25分 |
| 申込先研究会 | SANE |
| 資料番号 | SANE2013-65 |
| 巻番号（vol） | vol.113 |
| 号番号（no） | no.309 |
| ページ範囲 | pp.67-71 |
| ページ数 | 5 |
| 発行日 | 2013-11-15 (SANE) |
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