Comparative Study of Seismic Ground Motion Parameters in Deep-Cut and High-Fill Engineering before and after Ground Leveling

Abstract:

Because of lack of flat land, more and more deep-cut and high-fill engineering are being carried out in mountainous areas. The original geological formations are greatly changed by ground leveling. Therefore, it is very important to analyze the seismic parameters before and after ground leveling. In this paper, the seismic motion parameters before and after ground leveling of deep-cut and high-fill engineering are compared by the establishment of seismic response analysis model in different geological conditions. The results show that the peak acceleration and the characteristic period of the response spectrum are lower than those before excavation; But the results change when filling on the foundation of bedrock or the foundation where original cover soil layers have already existed. The peak acceleration and characteristic period of acceleration response spectrum increase more than those ground motion parameters before filling in this site. Besides, when filling in the bedrock site, the peak acceleration magnification tended to decrease, with the increase of the filling thickness, and the characteristic period tended to increase. Therefore, seismic ground motion parameters after ground leveling can be lower than those before ground leveling in excavation area, conversely, ground motion parameters are higher in fill area.

• Periodical: Applied Mechanics and Materials (Volume 872)
• Pages: 109-113
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.872.109
• Online since: October 2017
• Authors: Su Ting Mi*, Xin Qiu Meng, Xiao Bo Huang
• Keywords: Deep-Cut Engineering, Ground Leveling, High-Fill Engineering, Seismic Fortification, Seismic Ground Motion Parameters

References

[1] G. W. He, H. X. Zhou, Technology of Special Soft Ground Treatment for Airport, People traffic press, Beijing, (1996).

[2] X. J. Li, Q. Peng, Calculation and analysis of earthquake seismic motion parameters for different site categories, Earthq. Eng. Eng. Vibr. 21(1) (2001) 29-36.

[3] L. X. Zhou, X. B. Huang, H. X. Zhou, Study on Test under Airport High-Filling Engineering by Impacting Compaction, Archit. Tech. 38(SUPPL) (2007) 295-297.

[4] C. A. Cornell, Engineering Seismic Risk Analysis, BSSA, 58(5) (1968) 1583-1606.

[5] National Standard of the People's Republic of China. Code for Seismic Design of Buildings (GB50011-2010).

[6] National Standard of the People's Republic of China. Evaluation of seismic safety for engineering sites (GB17741-2015).

[7] Seismic zoning: Theory and Practice, Earthquake Press, (1989).