三维激光扫描技术在塔基岩溶精细化探测中的应用

Application of 3D Laser Scanning Technology for Karst Fine Detection in Tower Foundation

为了解决特殊岩溶(含水岩溶、危险性较大的岩溶)地质条件下岩溶空间信息获取困难的难题,采用三维激光扫描技术对某塔基桩底岩溶进行探测。通过扫描获取桩底岩溶点云数据并构建地下岩溶三维空间模型,并结合钻探精细查明桩底岩溶规模及发育特征。结果表明:桩孔底部溶洞高约2.1 m,顶部及底部埋深分别为4.0 m、6.1 m,最小、最大直径分别为0.60 m、2.63 m,溶洞空腔体积约4.6 m^(3)。三维激光扫描技术可有效提高岩溶定量化解释的精度,为设计人员处理岩溶问题提供更精确的岩溶空间信息。

In order to solve the problem that it is difficult to obtain karst spatial information under special karst water-bearing karst and dangerous karst geological conditions the 3D laser scanning technology is applied to the detection of karst at the bottom of the pile of the tower foundation.The point cloud data of the karst at the bottom of the pile is obtained by scanning and the three-dimensional space model of the underground karst is constructed and combined with drilling the scale and development characteristics of the karst at the bottom of the pile are finely identified.The results show that the height of the karst cave at the bottom of the pile hole is about 2.1 m the depth of the top and bottom is 4.0 m and 6.1 m respectively the minimum and maximum diameters are 0.60 m and 2.63 m respectively and the cavity volume of the karst cave is about 4.6 m^(3).The 3D laser scanning technology can effectively improve the accuracy of quantitative interpretation of karst and provide more accurate karst spatial information for designers to deal with karst problems.