【摘要】 以云南省保山市太极桥附近的顶管隧道爆破工程为例,对该桥头爆破振动数据进行监测.参照国内外爆破振动标准,判别该桥的安全程度,对振动数据进行回归分析,得到确保该桥安全的最大段起爆药量.基于HHT变换进行振动信号分析,爆破振动信号在传播过程中频率降低,且低频部分所占能量幅值较大,属爆破振动信号的优势频段,更易对建筑物造成损害.更多还原

【Abstract】 Taking the pipe-jacking tunnel blasting construction that near the Taiji bridage in Baoshan city,Yunnan Province as an example,we monitored the blasting vibration of the head of bridge. The Taiji bridge vibration influence was evaluated by referenced the domestic and international blasting vibration standards.Regression analysis for the vibration monitoring data was carried out to conclude the maximum segment charge which can make sure the safety of Taiji bridge. The blasting vibration signal was analyzed by HHT transform,it was concluded that the frequency of vibration signal is gradually decreased. With the signal spread,the component part of low frequency contained most account of energy of the signal. The buildings is more likely to be damaged by the lower frequency vibration.更多还原