Abstract：Abstract：Research purposes：Sebeta～Mieso section of the new Ethiopian railway is located in the Great Rift Valley, passing partly through the slope toe plains of Fantale dormant volcano, where a lot of small explosive volcanic cones are distributed and several developed ground fissures cross under the railway, the volcanic cavities concealed in the underground will endanger the safety of the railway works. Through the comprehensive ways of regional geological information collecting, geological investigation, geophysical prospecting and mechanical drilling in fieldwork, the distribution law of the volcanic cavities is found out to correctly evaluate the influence of cavities on the railway engineering, which is good for taking corresponding treatment measures to ensure the safety of the engineering.
Research conclusions：(1) Fantale volcano and plains region at the slope toe are the active district of the crustal plate and the quaternary volcano aggravating activity district. (2) Lava cavity, erosional cavity and ground fissure cavity are distributed along the railway. These cavities are closely related respectively to magmation, crustal motion and hydrodynamic activities. (3) There is no lava cavity existing underneath the subgrade. As for the ground fissure cavity and erosional cavity that endanger the safety of the railway engineering, the available treatment measures are put out for the cavities and the increasing expenditure is controllable.(4) This research conclusions can be applied to the geotechnical investigation field in volcanic activity region.
王茂靖 赵 平. 埃塞俄比亚铁路火山岩空腔形成机理及处理[J]. 铁道工程学报, 2015, 32(4): 32-.
WANG Mao-jing, ZHAO Ping. Formation Mechanism and Treatment Measures for Volcanic Cavity Found in the Construction of Ethiopian Railway
1］GB 50021—2001，岩土工程勘察规范［S］.
GB 50021—2001，Code for Investigation of Geotechnical Engineering［S］.
［2］TB 10027—2001，铁路工程不良地质勘察规程 ［S］.
TB 10027—2001，Code for Unfavorable Geological Condition Investigation of Railway Engineering ［S］.
［3］TB 10038—2001，铁路工程特殊岩土勘察规程［S］ .
TB 10038—2001，Code for Special Soil and Rock Investigation of Railway Engineering ［S］.
［4］工程地质手册编写委员会. 工程地质手册（第三版）［M］. 北京: 中国建筑工业出版社，1992.
The Editorial Board. Manual of Engineering Geology（The 3rd Edition）［M］. Beijing: China Architecture & Building Press,1992.
［5］李欣，赵平. 火山岩空腔专项工程地质勘察报告［R］.成都: 中铁二院工程集团有限责任公司,2014.
Li Xin,Zhao Ping. The Special Engineering Geological Report on the Volcanic Cavums［R］.Chengdu:China Railway Eryuan Engineering Group Co. Ltd,2014.
［6］王茂靖，张羽军，马建军. 黔桂线改扩建工程几处典型的地质选线［J］. 铁道工程学报,2006(7):24-29.
Wang Maojing, Zhang Yujun, Ma Jianjun. Typical Examples of Route Selection Based on Geological Conditions for Reconstruction of Guizhou-Guangxi Railway［J］. Journal of Railway Engineering Society,2006(7):24-29.
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