地质雷达在湖南邵阳金江水库坝体隐患探测中的应用研究

在金江水库坝体隐患探测中,使用地质雷达发现坝体的主要隐患来自坝体基岩的溶洞和因断裂、裂隙等渗漏通道在残坡积土层中所成的土洞。水库水位浸润线标高和残坡积土与基岩接触界面标高较接近,而使此高程的防渗能力更加薄弱,这也是此坝体的隐患之一。同时,根据地质雷达影像特征可探测灌浆工程的灌浆深度和水泥浆扩散半径,提出它可作为水利部门堤坝灌浆工程质量无损检测的一种新的技术手段。

THE APPLICATION OF GROUND PENETRATING RADAR TO THE HIDDEN DANGER DETECTION OF JINJIANG RESERVOIR DAM IN SHAOYANG COUNTY, HUNAN PROVINCE

The detection of hidden dangers in Jinjiang reservoir dam with ground penetrating radar shows that themajor hidden dangers of the dam are the karst caves in the dam basement rocks and the soil caves which were formedin the residual sola and talus sofa by percolating channels such is faults and fissures. Another hidden danger is theweakening of the impervious ability of the dam resulting from the closeness of the height of line seepage of the reservoir water level to the contact plane between the residual solum, talus solum and basement rocks. Meanwhile, as thedepth of grouting and the diffusion radius of the cement in grouting project can be shown by Ground PenetratingRadar images, this technique can become a new non-destructive test technology in dyke and dam grouting projects ofthe water conservancy department.