| Abstract: | Whether the rock mass integrity determination of building's rock foundation is correct will directly affect its security, constructive feasibility and economic results. Through drill-hole's coring to observe the fracture plane of rocks, to study the hardness of rocks, combining with the conditions of auxiliary drilling rate, footage, pressure and backflow, the rock mass integrity is determined comprehensively. It neither needs statistics nor test, and is of visible, fast and easy-to-use characteristics. The identical rate reached 100% by the test of 28 engineerings' excavations. |
