埃塞俄比亚新建铁路主要工程地质问题及对策  

Countermeasure and Primary Engineering Geological Problems of Newly-built Ethiopian Railway

作　　者：张昆[1] 郭菊彬[2] 李建强[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]西南交通大学峨嵋校区,四川峨嵋614202

出　　处：《铁道工程学报》2011年第10期38-41,共4页Journal of Railway Engineering Society

摘　　要：研究目的:通过地质测绘、勘探及室内试验,综合分析埃塞俄比亚新建铁路工程地质及水文地质特征,指出沿线不良地质及特殊岩土的分布及特点,并提出工程处理措施意见,以期对施工提供参考。研究结论:全线主要分布第三～第四纪火成岩,基本没有滑坡、泥石流及煤层采空区等重大不良地质,地质条件总体较好。地表水、地下水不发育,对工程基础影响较小;软土不发育,膨胀土及冲沟大面积分布;基岩差异风化明显,变化厚度大并且存在软弱夹层,对路堑、隧道及桥梁工程影响较大;受地形及构造影响,局部地段存在危岩落石及岩堆,但规模较小,较易于治理;受火山活动影响,局部地段地裂发育,对线路影响较大,宜作专题研究。Research purposes： In order to provide reference to construction, engineering geological and hydrological characteristics of newly - built Ethiopian railway is comprehensively analyzed with method of geological mapping, field investigation and laboratory test, the distribution and characteristics of unfavorable geology and special rock, as well as engineering corrective actions are pointed out.Research conclusions： Tertiary and Quaternary igneous rock is largely distributed, unfavorable geology such as landslide, collapse, debris and coal gob area is barely found along alignment, so geological condition is good. Surface and ground water is not well developed, thus it has little effect to engineering foundation, soft soil is not well developed too, but expansive soil and gully is widely distributed. Igneous rock is largely different weathered, the weathering depth various too much and soft layer exist, that has large effect to cutting, tunnel and bridge. Under the effect of landform and structure, dangerous rock and talus is distributed part of section but it is easily cured. Fissure is well developed in some area under the effect of volcanic action that has relative larger effect to alignment, specific research is suggested to do.

关 键 词：特殊岩土 不良地质 火成岩 膨胀土 冲沟 地裂 

分 类 号：U213.1[交通运输工程—道路与铁道工程]