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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >A geophysical study on soil conditions in flood-affected Selimpasa area, Istanbul, Turkey
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A geophysical study on soil conditions in flood-affected Selimpasa area, Istanbul, Turkey

机译：土耳其伊斯坦布尔受洪灾影响的Selimpasa地区土壤条件的地球物理研究

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摘要

Multi-channel analysis of surface waves (MASVV) and micrometer array measurements (MAM) have been carried out in the flood-prone areas of Selimpasa, Kavakli, Ortakoy and Kadikoy in Turkey to understand several soil problems, especially soil amplification during earthquakes. In the region, there are now more than 80 geotechnical boreholes with SPT and laboratory test data, as also MASW-MAM geophysical measurements at more than 100 locations. All these data have been evaluated to classify the soils according to Eurocode 8, determine soil amplification and finally to obtain a microzonation map. According to the Eurocode soil classification system, there are D, B and C type soils in the area of study. In the final microzonation map, the study area is divided into three sub-regions based on shear wave (Vs) velocities sub-region A (Vs velocities higher than 420 m/s), sub-region B (Vs velocities between 360 and 420 m/s) and sub-region C (Vs velocities lower than 360 m/s). Results show that there are clear relationships between Vs 30 and flood damage effect. Vs 30: 180 m/s is characteristic of zone with D type soil, which is transported alluvial soil. Vs 30 < 180 zones define the limits of the areas affected by floods in the study region.
机译：在土耳其的塞林帕萨，卡瓦克利，奥尔塔科伊和卡迪科伊等容易发生洪灾的地区，已经进行了多通道表面波分析（MASVV）和测微计阵列测量（MAM），以了解一些土壤问题，尤其是地震过程中土壤的扩增。在该地区，现在有80多个具有SPT和实验室测试数据的岩土钻孔，以及在100多个位置的MASW-MAM地球物理测量。对所有这些数据进行了评估，以根据欧洲规范8对土壤进行分类，确定土壤扩增并最终获得微区划图。根据欧洲规范土壤分类系统，研究区域内有D，B和C型土壤。在最终的微区地图中，根据剪切波（Vs）速度子区域A（Vs速度高于420 m / s），子区域B（Vs速度在360和420之间）将研究区域分为三个子区域m / s）和子区域C（Vs速度低于360 m / s）。结果表明，Vs 30与洪水破坏效应之间存在明确的关系。 Vs 30：180 m / s是带D型土壤的区域的特征，该类型土壤是冲积土壤。 Vs 30 <180区域定义了研究区域受洪水影响的区域的界限。

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