| Quantitative Zoning Assessment of Crustal Stability Along the Yunnan–Tibet Railway Line, Western China |
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| 作者姓名： | ZHANG Yongshuang YAO Xin HU Daogong GUO Changbao and XIONG Tanyu |
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| 作者单位： | 1 Key Laboratory of Neotectonic Movement and Geohazard, Ministry of Land and Resources, Beijing 100081, China; 2 Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China |
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| 基金项目： | This research was supported by the Special Project of Basic Work of Science and Technology (grant No. 2011FY110100), the Geological Survey of the Ministry of Land and Resources (grant No. 1212010541404), and the Project of the 12th Five-year National Sci-Tech Support Plan (grant No. 2011BAK12B09). |
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| 摘 要： | The planned Yunnan–Tibet railway goes through the northwest of Yunnan Province and the southeast of the Tibet Autonomous Region. Because of its location near the collision belt of the Eurasian and Indian plates, complex engineering geological conditions and difficult engineering geological problems are encountered. The study is aimed at making the zoning assessment of crustal stability along the railway line so as to provide a better base for its construction, especially its line selection. For this purpose, the following seven influencing factors of crustal stability were selected and quantified by grading and scoring: active fault, seismic activity, geo-stress field, geo-strain field, geothermal field, geo-hazard, and lithologic character. Of these factors, the active fault, seismic activity and geo-hazard are the three most prominent factors influencing the railway construction. Along the railway line there are 1731703 calculation units to be divided. The zoning assessment calculation was completed by ArcGIS-based information fusion method. The assessment results aid railway line selection and show that there are 10 stable sectors, 28 relatively stable sectors, 23 relatively unstable sectors, and 20 unstable sectors along the Yunnan–Tibet railway line.
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| 关 键 词： | railway engineering geo-hazard active fault crustal stability influence factor zoning assessment Yunnan province Tibet |
| 收稿时间： | 2011/12/9 0:00:00 |
| 修稿时间： | 2012/3/28 0:00:00 |
Quantitative Zoning Assessment of Crustal Stability Along the Yunnan–Tibet Railway Line,Western China |
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| Authors: | ZHANG Yongshuang YAO Xin HU Daogong GUO Changbao XIONG Tanyu |
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| Institution: | 1. Key Laboratory of Neotectonic Movement and Geohazard, Ministry of Land and Resources, Beijing 100081, China;2. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China |
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| Abstract: | The planned Yunnan–Tibet railway goes through the northwest of Yunnan Province and the southeast of the Tibet Autonomous Region. Because of its location near the collision belt of the Eurasian and Indian plates, complex engineering geological conditions and difficult engineering geological problems are encountered. The study is aimed at making the zoning assessment of crustal stability along the railway line so as to provide a better base for its construction, especially its line selection. For this purpose, the following seven influencing factors of crustal stability were selected and quantified by grading and scoring: active fault, seismic activity, geo‐stress field, geo‐strain field, geothermal field, geo‐hazard, and lithologic character. Of these factors, the active fault, seismic activity and geo‐hazard are the three most prominent factors influencing the railway construction. Along the railway line there are 1731703 calculation units to be divided. The zoning assessment calculation was completed by ArcGIS‐based information fusion method. The assessment results aid railway line selection and show that there are 10 stable sectors, 28 relatively stable sectors, 23 relatively unstable sectors, and 20 unstable sectors along the Yunnan–Tibet railway line. |
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| Keywords: | railway engineering geo‐hazard active fault crustal stability influence factor zoning assessment Yunnan province Tibet |
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