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梳理了国内珊瑚岛礁岩土工程物探调查的现状,结合钻孔原位测试,采用成熟的物探方法对珊瑚岛礁进行综合地球物理勘探,说明了各种物探方法的场地适应性和效果。主动源面波探测效果好,面波视速度剖面很好地反映了珊瑚碎屑层与礁灰岩的地层层序;水域地震反射波对外礁坪、向海坡、外海的沉积层界面反映清晰,发现某岛礁的西南、东北端的水底形态不对称,沉积层差异大,可能与珊瑚礁成长的海洋水动力环境有关。孔内电阻率原位测试数据表明,松散珊瑚碎屑层与礁灰岩的电阻率差异很小,在同一数量级,总体上无法采用电法类勘探方法进行地质分层。
Combining with the geophysical prospecting survey of reef geo-reef geology in China, the geophysical prospecting of coral reefs is completed by using well-established geophysical methods in situ drilling. The suitability and effectiveness of various geophysical prospecting methods are illustrated. Active surface wave detection effect is good, surface wave velocity profile reflects well the coral detrital layer and reef limestone stratigraphic sequence; seismic reflection of water on the outer reef Ping, to the sea surface, the clear reflection of the sedimentary layer of the outer sea It was found that the shape of the bottom of the southwestern and northeastern ends of an island reef is asymmetric, and the difference in sediments is large, which may be related to the marine hydrodynamic environment in which coral reefs grow. In-hole resistivity in-situ test data show that the resistivity of loose coral reef and reef limestone is very small, in the same order of magnitude, the overall electrical method can not be used for geological stratification.