对早龄期混凝土取芯，测出其弯拉强度，作为抗裂限值。
Drill several cores at different ages of the early age concrete, then measure its flexural strength, take this flexural strength as the anti-cracking limits.
在现场地应力测量过程中发现了岩芯饼裂、钻孔径缩和钻孔破碎塌孔等现象，分析了这些现象的力学机理。
During course of in situ stress measurement, some problems such as core discing, minification and caving of borehole due to horizontal stress are appeared, and their mechanism is studied.
运用深钻孔套芯解除法对阳江抽水蓄能电站进行了三维地应力测量，并将测试结果与水压致裂法进行了比较。
The overcoring method in deep borehole is one of the robust 3D geo-stress measuring methods at home and abroad.
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