为进一步揭示基于损伤累积的爆破振动波传播与衰减规律，设计混凝土试块进行损伤累积及爆破振动测试试验。结果表明，测点损伤值随爆破次数增加持续增大，中远区测点损伤有初期缓增及后期突增两阶段；测点单次爆破振动速度随距离增大而减小，近区测点振动速度减小较中、远区测点快；测点爆破振动速度随爆破次数增加总体减小，且爆源近区减小较快，中远区呈小幅度缓慢减小；随爆破次数继续增大各测点振动速度存有突增过程，且衰减系数 增加缓慢， 值减小，两者均存在小幅度畸变过程；多次爆破时确定振动安全阈值及爆破振动波传播衰减规律( 、 值)时应充分考虑损伤累积效应。
Abstract
In order to further reveal the propagation attenuation laws of blasting vibration based on damage accumulation, author designed damage accumulation and blasting vibration testing experiment of concrete block. The results show that the damage value of the measured points went on increasing with the increase of the blasting times. The damage value can be divided into two stages in middle and far area, a slow increase at early stage and a quick increase at later stage. Single blasting vibration velocity of measured points decreased with the distance increasing, and vibration velocity of measured points in the near area decreased faster than the middle and far area. The blasting vibration velocity of measured points went on decreasing generally with the increase of the blasting times, and the vibration velocity near the explosion source decreased rapidly, But In middle and far area, the velocity decreased in small amplitude and slowly. And with the increase of the blasting times, the vibration velocity has the process of sudden increase. The vibration attenuation coefficient increased slowly with the increase of blasting times, however, the value of reduced, and both of them had a process of small amplitude distortion. Under the condition of repeated blasting, the determination of the safety threshold and propagation attenuation laws（the value of and ）of the blasting vibration should take full account of the blasting vibration damage accumulation effect.
关键词
损伤累积 /
爆破振动 /
传播与衰减规律 /
试验研究
{{custom_keyword}} /
Key words
damage accumulation /
blasting vibration /
propagation attenuation laws /
experimental study
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 熊代余,顾毅成. 岩石爆破理论与技术新进展[M]. 北京：冶金工业出版社,2002
[2] 姚强，杨兴国,陈兴泽,等.大型地下厂房开挖爆破振动动力响应数值模拟[J]. 振动与冲击, 2014, 33(6):66-70.
YAO Qiang, YANG Xing-guo, CHEN Xing-ze, et al. Numerical simulation of dynamic response of large underground powerhouse subjected to blasting vibration[J]. Journal of Vibration and Shock, 2014, 33(6):66-70.
[3] 朱传统,张正宇,佟锦岳,等. 爆破对新浇筑混凝土的影响和控制标准的研究[J]. 爆破,1990,7(3):28-32.
ZHU Chuan-tong, ZHANG Zheng-yu, TONG Jin-yue,et al. Study on the influence of blasting on the new concrete and its control standards [J]. Blasting,1990,7(3):28-32.
[4] 高鸣安,吴新霞. 新浇大体积混凝土安全爆破振动控制标准[J]. 人民长江,1998,29(4):11-13.
GAO Ming-an, WU Xin-xia. Analysis on control standard of blasting security for fresh mass concrete[J]. Yangtze River,1998,29(4):11-13.
[5] 陈明,卢文波. 超早期混凝土爆破安全振动速度的讨论[J]. 工程爆破,2006,12(2):79-81.
CHEN Ming, LU Wen-bo. Safety vibration velocity of fresh concrete under blasting vibration[J]. Engineering Blasting ,2006,12(2):79-81.
[6] 宋光明. 爆破振动小波包分析理论与应用研究[D]. 湖南：中南大学,2001.
[7] 吕涛,李海波,周青春,等. 传播介质特性对爆破振动衰减规律的影响[J]. 防灾减灾工程学报,2008,28(3):335-341.
Lü Tao, LI Hai-bo, ZHOU Qing-chun,et al. The influence of the characteristic of medium on the attenuation law of propagation of vibration due to blasting[J]. Journal of Disaster Prevention and Mitigation,2008,28(3):335-341.
[8] 褚怀保,杨小林,梁为民,等. 煤体爆破损伤规律模拟试验研究[J]. 采矿与安全工程学报, 2011, 28(3):488-492.
CHU Huai-bao,YANG Xiao-lin, LIANG Wei-min,et al. Experimental study on the blast damage law in simulation coal[J]. Journal of Mining & Safety Engineering, 2011, 28(3):488-492.
[9] 李朝阳,宋玉普,车轶. 混凝土的单轴抗压疲劳损伤累积性能研究[J]. 土木工程学报,2002, 35(2):38-40.
LI Chao-yang,SONG Yu-pu,CHE Yi. Study on cumulative damage behavior of concrete under uniaxial cyclic load[J]. China Civil Engineering Journal, 2002, 35(2):38-40.
[10] Li X B, Lok T S, Zhao J. Dynamic characteristics of granite subjected to intermediate loading rate[J]. Rock Mechanics and Rock Engineering, 2005, 38(1):21-39.
[11] 闫长斌,王贵军,王泉伟,等. 岩体爆破累积损伤效应与动力失稳机制研究[M]. 郑州：黄河水利出版社,2011: 82- 90.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(1466 KB)
