论文部分内容阅读
采用钻孔综合物探新技术,探测隔河岩工程坝基岩溶并对大坝帷幕灌浆质量进行检测,满足了工程地质及设计、施工部门的要求。文中阐述了电磁波、地震波层析成象技术及其实现方法,利用改进型联合迭代法对帷幕灌浆前后实测资料进行层析成象结果表明,坝基浅部发育一定规模的岩溶,坝基深部岩溶不发育。查明了301夹层的范围及其延伸方向。坝基岩体经灌浆处理后,岩体性状(依据V_p及β_3)得到了一定的改善,灌浆效果显著。
Using drilling integrated geophysical exploration technology to detect the geogrid of Geheyan project and to inspect the quality of the dam curtain grouting, it meets the requirements of engineering geology and design and construction departments. In this paper, the electromagnetic wave and seismic tomography imaging technique and its realization method are described. The tomographic imaging of the measured data before and after the curtain grouting by the improved joint iteration method shows that a certain amount of karst is developed in the shallow part of the dam foundation and the deep karst in the dam foundation is undeveloped . The scope of 301 mezzanine and its direction of extension were identified. After grouting treatment, the rock mass characteristics (based on V_p and β_3) have been improved to some extent, and the grouting effect is remarkable.