The loess microstructure kinds and its seismic subsidence
- 1 Lanzhou Institute of Seismology, CEA, Lanzhou, China
- 2 Lanzhou Institute of Seismology, CEA, Lanzhou, China
Abstract
The paper put forward a new method of loess microstructure analysis to determine whether the loess seismic subsidence deformation to be strong or weak. In the dryer and colder climatic conditions of northwest of China, the loess microstructure formed in certain conditions changed by the special climate and desert surroundings. According to its chemical element ratio (such as Si/Al, Ca/Fe, K/Al, Ca/Mg) and seismic s ubsidence, we could divide them into four kinds of microstructures: strong shear deformation microstructure(I); strong compaction deforma tion microstructure(II); the medium seismic sub sidence microstructure(III); the low seismic sub sidence microstructure(IV). It could generally judge and set deeply defense measures to seismic engineering.
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