最可靠的非开挖地下岩体结构勘察方法——高精度超声波钻孔成像

The Most Reliable Method to Expose Trenchless Underground Rock Mass Structure High Precise Ultrasonic Logging

主要通过超声成像测井在长江某穿越工程区勘察工程中的应用研究,类比常规勘察技术和其他钻孔成像技术,并结合超声测井在国内其他方面的案例,剖析新一代超声测井仪的优势所在:如在基岩风化带的描述、岩石质量指标RQD分析,特别是地下岩体裂隙、节理等地质结构信息的精确揭露上,具备其他勘察手段无法比拟的优势,可以提供大量有效可视的钻孔岩体定量数据,为工程设计的定量化分析提供了详细的数据资料。可以说在揭露地下岩体结构方面,高精度超声测井是目前为止最为有效可靠的手段。

Taking for example the ultrasonic logging imaging in one crossing engineering investigation of Yangtze River, and combined with other cases of high precise ultrasonic logging in China, then compared with traditional investigation tech- nique and other logging imagings, this paper aims at analysising the advantage of new ultrasonic logging tool, such as in the aspect of the description of bedrock weathering zone and the estimation of rock quality designation. Especially in the aspect of precisely exposing rock fractures of underground rock mass structure, high precise ultrasonic logging imaging can provide large quantities of effective and apparent data rock mass around borehole, and these data are very good basis for the quantitative analysis of engineering design and point out one effective access to improve the technological level of geotechnical investigation, at the same time proving itself the most reliable method to expose trenchless underground rock mass structure up to now.