Vibration Analysis of Masonry Structures Due to Blasting Construction of Mountain Tunnels

摘要

Blasting construction of Houyuntai Mountain tunnels has vibration influence on ground masonry structures. 3-D finite element model is established to analyze this problem which indicates the house's vibration response velocity induced by blasting loads. According to this analysis, the structure range of removal and strengthening is assured based on the allowable safety standard of 0.02～0.025m/s of blasting vibration. They include that the houses in 20m range of both sides of horizontal tunnel axis should be removed; the security in 20～28m range is not good, as a result the houses should be removed or strengthened; And the security over 28m range is good for houses. Moreover, some factors such as construction quality can influence houses' anti-vibration safety.