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日本位于世界上地壳运动最为活跃的一个区域,该国地质地貌条件复杂多变,经常容易发生地震。而且,气候条件也相当恶劣,时常发生强降雨和强降雪。每年日本有相当多的地方发生自然灾害。 相似文献
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曾广颜 《交通世界(建养机械)》2010,(1):164-167
前言
尼日利亚地处西非,雨季雨量充沛而旱季高温少雨,年平均气温为26~27℃,最高温度36℃。当地沥青为70#。北部地区靠近沙漠.花岗岩材质表面风化。拉各斯地区靠近大西洋,花岗岩由地壳运动形成,材质较硬度。无其他适宜粗骨料源。尼日利亚施工标准采用英标。这些都需要因地制宜的进行试验调整施工工艺。 相似文献
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The crustal movements, probably motivating earthquakes, are considered as one of the main geodynamic sources. The quantitative measurements of ground surface deformations are vital for studying mechanisms of the buried faults or even estimating earthquake potential. A new space-geodetic technology, synthetic aperture radar interferometry (InSAR), can be applied to detect such large-area deformations, and has demonstrated some prominent advantages. This paper reviews the capacity and limitations of InSAR, and summarises the existing applications including some of our results in studying the earthquake-related crustal motions.Finally it gives the outlook for the future development of InSAR. 相似文献
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