Cangxi group complex at Wenjiashi area of eastnorthern Hunan is a metamorphic rock series of higher greenschist to lower amphibolite facies, its whole rock isochron age: 2090±20Ma,∑Nd(T)=5.

The landslide groups and unstable rock mass of Dongxi,which are classified as provincial inspection spots of geological hazard in Sichuan Province,are induced by the rockfalls and landslips.

According to the experiment based on the study of the natural vibration of 21 organic glass wall supporting group silos,the shifty regularity of the basic frequency of vibration and vibration model are studied,when the number of the silos,the position of the hole on the supporting part,stiffness of the building above top of silo,and the quantity of stored material change respectively.

This paper is aiming at the big diameter grouped silos, and considering the restrain and effected action among the group silos, especially, star siloare fully loaded, compared with singe silo, we think that the method of calculating internal force is different.

Based on experimental study of the 35 multi silos models and 14 single silo models which are supported by silos wall themselves, this paper analyzes the influencing factors of the natural vibration characteristics: silo amount n, height diameter ratio H/D, and opening extent experimental results, and a regression equation is presented, which is of good accuracy.