| 大柳树坝址工程断错效应分析 |
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| 引用本文： | 马润勇,彭建兵.大柳树坝址工程断错效应分析[J].工程地质学报(英文版),2008,16(2):155-161. |
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| 作者姓名： | 马润勇 彭建兵 |
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| 作者单位： | 长安大学地质工程与测绘工程学院 西安 710054 |
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| 基金项目： | 国家自然科学基金
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国家西部交通建设科技项目 |
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| 摘 要： | 坐落于中卫-同心活动断裂带中间部位的黄河黑山峡大柳树坝址,距F201发震断层垂直距离不足1.5km。统计表明,在青藏高原及其周缘地区,当发生Ⅶ级以上破坏性地震时,距发震断裂两侧3～5km的范围内都有可能出现断层的分支破裂、次生破裂等错断效应。大柳树坝址处于Ⅶ级以上地震时的分支破裂发生带内,因此,存在工程错断效应问题。三维有限元数值模拟结果表明,断层F201发生错动时,坝址地段断层F93、F39、F40相对于F201的错动比率处分别达到14.38%、12.00%和9.84%以上。
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| 关 键 词： | 大柳树坝址 工程错断效应 活断层 数值模拟 |
| 收稿时间： | 2007-04-20 |
| 修稿时间： | 2007年4月20日 |
ENGINEERING EFFECTS TO DALIUSHU DAM SITE DUE ACTIVE DISLOCATION OF ADJACENT FAULTS DURING MAJOR EARTHQUAKES IN QINGHAI-TIBET PLATEAU |
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| MA Run-yong,PENG Jian-bing.ENGINEERING EFFECTS TO DALIUSHU DAM SITE DUE ACTIVE DISLOCATION OF ADJACENT FAULTS DURING MAJOR EARTHQUAKES IN QINGHAI-TIBET PLATEAU[J].Journal of Engineering Geology,2008,16(2):155-161. |
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| Authors: | MA Run-yong PENG Jian-bing |
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| Institution: | College of Geological Engineering and Geometry, Chang'an University, Xi'an 710054 |
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| Abstract: | The Daliushu Dam Site in the Heishanxia Gorge of the Yellow River is seated in the middle of Zhongwei-Tongxin active fault zone. It is apart 1.5 km from the seismogenic fault F201. The results of statistics indicated that the rupturing effects such as branch fractures and secondary fractures will be appeared around the adjacent 3~5 km area from seismogenic fault, if the Ms7.0 Earthquakes happen in the Qinghai-Xizang plateau and its margins. The Daliushu Dam Site is located in the zone of branch fracture occurrence when Ms7.0 Earthquakes happen., So, engineering rupturing effects will be in existence. Result of 3-D finite element analysis indicates that the dislocation ratio of the faults F93, F39, and F40 relative to the fault F201 arrives at 14.38%、12.0% and 9.84% respectively, when the rupturing effects of fault F201 happen. |
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| Keywords: | Daliushu dam site Engineering rupturing effects Active fault Numerical simulation |
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