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中文摘要：
为了研究通海盆地的地震动场地效应，在强地面运动的数值模拟计算中需要提供该地区的浅层速度结构模型．为此，在通海盆地开展了10km高分辨率反射地震勘探和30个测点的面波联合勘探工作．综合本次探测结果与褐煤普查中的电测深和钻孔资料，得到了通海盆地的基岩埋深分布图．结果表明，在通海盆地中部，新生界厚度为100-300m，整体表现出西南厚东北薄的趋势，盆地沉积层厚度变化明显受到小江断裂南段分支断裂的控制．浅层速度随深度分布表现出在深度相同的情况下，盆地边缘的速度高于盆地中部．
英文摘要：
In order to study the site effect on the ground motion in Tonghai basin, the model with shallow layer velocity structure must be provided for the simulation of strong ground motion. To this end, reflection surveys with high resolution along 10 km profile combined with the surface wave exploration at 30 observations are carried out in Tonghai basin. Integrating the existing data from borehole and electrical sounding performed before for lignite prospecting, the depth distribution of the bedrock is figured out by analyzing the measured data. Results show that the thickness of Cenozoic is 100~300 m in the centre of the basin and exhibit an overall trend of thick in southwest and thin in northeast. The variation of the sediment thickness is apparently controlled by the branch fault in the south of Xiaojiang fault. The shallow layer velocity at the edge of the basin is larger than that in the centre for the same depth.
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