埃塞俄比亚奥罗米亚省北谢瓦区博瓦达约尔大站点的工程地质评估,埃塞俄比亚
Ashu Fekadu1, Yadeta C Chemeda1, Shankar Karuppannan1,2
1Department of Applied Geology, College of Applied Natural Science, Adama Science and Technology University, Adama, P.O. Box: 1888, Ethiopia.
Heliyon
|January 16, 2025
概括
埃塞俄比亚的工程地质评估发现,博瓦大约尔大面临的挑战是由于基岩和软岩的破裂. 适当的基础设计可以减轻定居风险,并确保水安全.
科学领域:
- 地质技术工程 地质技术工程
- 工程地质工程地质学
- 水文地质学 水文地质学
背景情况:
- 包括埃塞俄比亚在内的发展中国家面临着严重的粮食和水资源不安全,而干旱等气候事件加剧了这一现象.
- 博瓦·戴奥尔石重力大项目旨在改善农业灌和缓解水资源短缺问题.
- 复杂的地质条件,包括破碎的玄武岩和薄弱的岩,对大的基础构成工程挑战.
研究的目的:
- 对博瓦·达约尔水站点和水库进行全面的工程地质评估.
- 评估现有岩石和土壤单位的基础适用性.
- 识别和提出潜在地质风险的缓解策略.
主要方法:
- 地质绘图和不连续性测量以表征现场地质.
- 核心钻探和实验室测试 (点负载指数测试,岩石质量指定) 以确定岩石质量属性.
- 在现场进行透性测试 (打包器测试),以评估地下水流动特征.
主要成果:
- 识别的石质单元包括流/流沉积物,阿法尼特基岩岩和岩,呈现不同程度的气候变化和断裂.
- 岩石强度差异很大,不受限制的压力强度从0.16 MPa到146.88 MPa不等.
- 液压导电性 (Lu < 1) 表明过度泄漏的风险最小,而允许承载能力在玄武岩 (0.5418.86 MPa) 和陶 (0.0370.11 MPa) 之间存在显著差异.
结论:
- 岩单元具有较低的承载能力,可能导致差异化结算.
- 即使是通过合格的阿法尼特基岩岩石和坚固的基础建设来分配负载,对于缓解定居点至关重要.
- 该研究提供了对博瓦·达约尔大安全有效的设计和施工的基本数据.
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