摘要
为了研究下穿村庄隧道爆破振动效应,以太锡铁路太崇段新建崇礼隧道下穿和平村实际工程为研究对象,利用等效药量与等效距离的概念改进萨道夫斯基公式,通过实测爆破振速对其进行回归分析,建立适用于本工程的振速预测模型。然后,利用小波包分析对能量分布规律,得出能量衰减模型。结果表明:改进公式预测模型最大相对误差仅为—6.75%,提高了爆破振速预测精度。随着等效药量与等效距离的增加,爆破低频带能量占比呈升高的趋势,而随着等效距离的增加,爆破振动能量衰减很快,等效距离50 m以上时,爆破振动能量衰减趋于平缓。
In order to study the blasting vibration effect of the tunnel the village, taking the actual project of the new Chongli tunnel under the Heping village of the Taichung section of the Taichung section of the Taichung railway as the research object, using the concept of equivalent charge and equivalent distance to improve the Sadovsky formula, and through the regression analysis of the measured blasting vibration velocity, the vibration velocity prediction model applicable to the project is established. Then, the energy distribution law is analyzed by wavelet packet, and the energy attenuation model is obtained. The results show that the maximum relative error of the improved formula prediction model is only-6.75%, which improves the prediction accuracy of blasting vibration velocity. With the increase of the equivalent charge amount and the equivalent distance, the energy proportion of low frequency blasting zone presents an increasing trend, while with the increase of the equivalent distance, the blasting vibration energy attenuates rapidly. When the equivalent distance is more than 50 m, the blasting vibration energy attenuates gently.
作者
王海龙
柏皓博
王晟华
WANG Hai-long;BAI Hao-bo;WANG Sheng-hua(Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Hebei Innovation Center of Transportation Infrastructure in Cold Region,Zhangjiakou 075000,Hebei,China;North prosperous construction group Co.,Ltd.,Chengde 067400,Hebei,China;Hebei Province Prefabricated Construction and Underground Engineering Technology Innovation Center,Chengde 067400,Hebei,China)
出处
《工程爆破》
CSCD
北大核心
2022年第6期111-118,共8页
Engineering Blasting
基金
国家自然科学基金资助项目(51878242)
河北省研究生创新基金资助项目(CXZZSS2021153)。
关键词
隧道爆破
改进萨道夫斯基公式
小波包分析
爆破振动能量
tunnel blasting
improved Sodev’s formula
wavelet packet analysis
blasting vibration energy
