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莫高窟落石風險的試驗與模擬=Field Test and Simulation Study for Landslide Risks at the Mogao Grottoes |
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| 著者 |
王沛濤 (著)=Wang, Pei-tao (au.)
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張虎元 (著)=Zhang, Hu-yuan (au.)
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王旭東 (著)=Wang, Xu-dong (au.)
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| 掲載誌 |
敦煌研究=Dunhuang Research
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| 巻号 | n.6 (總號=n.172) |
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| 出版年月日 | 2018 |
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| ページ | 159 - 167 |
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| 出版者 | 敦煌研究編輯部 |
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| 出版サイト |
http://www.dha.ac.cn/
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| 出版地 | 蘭州, 中國 [Lanzhou, China] |
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| 資料の種類 | 期刊論文=Journal Article |
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| 言語 | 中文=Chinese |
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| ノート | 作者單位：蘭州大學土木工程與力學學院；敦煌研究院 |
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| キーワード | 莫高窟=Mogao Grottoes; 落石=falling stone; 現場試驗=field test; 數值模擬=numerical simulation |
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| 抄録 | 莫高窟崖體是承載洞窟的載體,崖體一直遭受嚴重的風化侵蝕,窟區落石頻發,威脅窟區遊客安全和護欄穩定。查明莫高窟窟區落石的來源成因及威脅區域是首要問題,本文應用地質勘察、現場試驗、現場調查統計、數值模擬手段得出以下結論:莫高窟落石來源分為轉石型落石和剝離型落石兩種,南窟區以轉石型落石為主,北窟區以剝離型落石為主。轉石型落石來源區分佈在崖頂附近35°—40°的緩坡地帶,在啟動後一次性滾落崖底的情況較少,大部分是多次順坡運動的結果。轉石型落石的水平運動距離與質量和形狀密切相關,其運動形態與形狀密切相關,威脅區域在崖底水平向外2—5m的範圍內。本文研究有助於莫高窟風險預警體系的完善,也為後續落石風險監測和防治措施的設計提供一定依據。
The cliff of the Mogao Grottoes has been subjected to serious weather erosion which can lead to landslides and falling rocks and poses a serious threat to the security of the caves and tourists that come to view them. The primary task of this essay is to investigate the source of falling stones, the process that loosens them, and to determine the exact area likely to be effected. The following conclusions have been drawn from geological surveys, field tests, field investigation, statistical analysis, and numerical simulation: 1. The Mogao Grottoes have two different kinds of stone falling, rolling stones that mainly happen in the Southern Area and peeled stones in the Northern Area that are stripped off the face of overhead cliffs. Rolling stones develop from the35—40 degree slope near the top of the cliff in the southern end of the caves, which roll down the slope after gradual loosening and movement. The horizontal distance the rolling rocks travel over the ledge is related to the mass and shape of the stones but generally falls within 2 to 5 meters away from the base of the cliff. This study is helpful for improving the preventative emergency warning system at the Mogao Grottoes, and provides some useful information for designing landslide risk monitoring and control measures. |
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| 目次 | 1 引言 160
2 莫高窟落石的來源及成因 160
2.1 崖頂緩坡地帶 160
2.2 崖眉附近差異性風化區 161
3 莫高窟落石現場試驗 161
3.1 試驗場地及環境條件 161
3.2 試驗過程 162
3.3 試驗結果及分析 163
（1）落石形狀與落石運動的關係 163
（2）落石質量與落石運動的關係 164
（3）北窟區天然狀態下落石統計 164
4 落石運動軌跡數值模擬 165
4.1 模擬參數的選定 165
4.2 模擬結果 165
5 結論 166 |
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| ISSN | 10004106 (P) |
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| ヒット数 | 248 |
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| 作成日 | 2020.11.04 |
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