现场测试表明，该方法对开口裂缝深度的测试是相当有效的。
The measuring results in field show that the impact-echo method is effective in measuring the depth of surface-opening crack.
改进的库仑精确解算法对超载的处理及裂缝深度的计算简单；
The improved method is simple to handle load on soil surface and calculate crack depth.
在李家峡水电站主坝的检测中，检测裂缝深度最深达到1.1 M左右。
In hydroelectric power station of Li Jiaxia dam detection, the testing crack depth is deepest achieves about 1.1m.
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