基于CSAMT法的地基基础评价.PDF

41 4 ( ) Vol.41 No.4 2010 8 Journal of Central South University (Science and Technology) Aug. 2010 CSAMT (100029) CSAMT CSAMT CSAMT P631.3251 A 1672−7207(2010)04−1561−08 Foundation evaluation based on CSAMT method CHENG Hui, LI Di-quan, DI Qing-yun, FU Chang-min, WANG Ruo (Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China) Abstract: Based on the fact that the high-rise buildings are planning to be built in the center of Tangshan city, which is in the overall reconstruction planning of the city, there is a risk area to build high-rise buildings, gob collapse, karsts collapse, buried structural fracture zone and ground fissures in this area, which would be the disadvantageous factors for the construction of the high-rise buildings, the foundation evaluation with controlled source audio-frequency magnetotelluric method (CSAMT) was executed to find out the potential weak geological structure. Reliable 3D resistivity sets were gotten in the investigated area. The electric distribution of different profiles and horizontal slices in different depths were studied, and the district was obtained and confirmed by drilling information. The results show that the CSAMT detection results can be used to distinguish different types of adverse geologic structure and tectonics, and to arrange the drilling location rationally. Key words: CSAMT; foundation evaluation; strong interference [1] 100