高架桥爆破拆除触地振动速度特征分析

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (11) : 151-154.

论文

高架桥爆破拆除触地振动速度特征分析

杨永强1 胡进军1 谢礼立1,2 吴兴和1

作者信息 +

Characteristics of ground vibration velocity in viaduct blasting demolition

YANG Yongqiang1 HU Jinjun1 XIE Lili1, 2 WU Xinghe1

Author information +

文章历史 +

摘要

以某高架桥爆破拆除工程为例，总结了高架桥爆破拆除塌落引起的地面振动特征，通过与经验公式对比，分析了高架桥爆破拆除塌落触地振动速度衰减规律与经验公式之间的差异，主要结论如下：三条测线地面振动速度峰值中竖向分量最大，两个水平分量较小；测线2和测线3各测点的地面振动速度峰值比测线1略大，说明地面振动存在一定的叠加，并且测点距离高架桥越远叠加越明显；本次高架桥爆破拆除塌落触地振动的主振频率偏低；竖向分量的主振频率最高，径向和切向主振频率较低且相近；在测点距离较小时，地面振动速度实测值小于经验公式计算值，而距离较大时在相反，实测值与距离接近于线性关系；本次爆破拆除方案设计合理，周边建筑物安全。

Abstract

Based on the measured results, ground vibration velocity characteristics caused by blasting demolition of the viaduct was analyzed and the difference of collapsing touchdown vibration attenuation law of blasting demolition between measured results and empirical formulas was discussed. The main conclusions are as follows: the vertical component peak of ground vibration velocity is the largest, peaks of the two horizontal component are small; the peak value of ground vibration velocity of each measuring point in line 2 and line 3 is slightly larger than line 1; ground vibration is superposed, and the superposition becomes obvious with the increase of distance; the main vibration frequencies are low in this case, and the main vibration frequency of vertical component is almost highest in every measuring point; when the distance between measuring point and viaduct is small, the measured values of ground vibration velocity are less than the calculated value by empirical formula, and the distance is larger in the opposite; the measured values and distances are close to the linear relationship; the blasting demolition scheme is reasonable and the surrounding buildings are safe.

导出引用

杨永强1 胡进军1 谢礼立1,2 吴兴和1. 高架桥爆破拆除触地振动速度特征分析[J]. 振动与冲击, 2016, 35(11): 151-154

YANG Yongqiang1 HU Jinjun1 XIE Lili1, 2 WU Xinghe1. Characteristics of ground vibration velocity in viaduct blasting demolition[J]. Journal of Vibration and Shock, 2016, 35(11): 151-154

参考文献

[1] 何军, 于亚伦, 李彤华. 城市建(构)筑物控制拆除的国内外现状[J]. 工程爆破, 1999, 5(3): 78-83.
HE Jun, YU Yalun, LI Tonghua. Current situation of demolishing urban structures with controlled blasting at home and abroad[J]. Engineering Blasting, 1999, 5(3): 78-83(in Chinese)
[2] 徐书雷, 郑学召, 王小林等. 浅述国内外爆破拆除现状[J]. 爆破, 2003, 20(2): 20-23.
XU Shulei, ZHENG Xuezhao, WANG Xiaolin, et al. Brief Description about Current Situation of Demolition Blasting at Home and Abroad[J]. Blasting, 2003, 20(2): 20-23(in Chinese)
[3] 汪旭光, 于亚伦. 21世纪的爆破拆除技术[J]. 工程爆破, 2000, (3): 32-35.
WNAG Xueguang, YU Yalun. Demolition blasting technology faced with the 21 Century [J]. ENGINEERING BLASTING, 2000, (3): 32-35(in Chinese)
[4] 陈宝心, 邓枚. 建(构)筑物机械拆除方法综述[J]. 施工技术, 2004, 33(6): 51- 52.
CHEN Baoxin, DENG Mi. Introduction of mechanical removing-building methods[J]. Construction Technology, 2004, 33(6):51-52(in Chinese)
[5] 林继清. 关于爆破加速度测量的几个问题[J]. 岩土力学, 1984, 5(1): 57-63.
LIN Jiqing. The measuring of explosive acceleration for several problems[J]. Rock and Soil Mechanics, 1984, 5(1): 57-63(in Chinese)
[6] 徐泽沛. 爆破拆除塌落过程及触地振动的分析研究[D]. 长沙理工大学, 2004
[7] 姚琼. 建筑物爆破拆除塌落振动作用下周边结构的安全性分析[D]. 武汉理工大学, 2007
[8] 贺建辉. 爆破地震波作用下建筑物振动数值模拟及安全性评价研究[D]. 长安大学, 2013
[9] 周家汉. 爆破拆除塌落振动速度计算公式的讨论[J]. 工程爆破, 2009, 15(1):1-5.
ZHOU Jiahan. Discussion on calculation formula of collapsing vibration velocity caused by blasting demolition [J]. Engineering Blasting, 2009, 15(1):1-5(in Chinese)
[10] Guo YL, Zuo YJ, Wang DA. Discussion on Collapse Vibration Caused by Demolition Blasting[C] // New Development on Engineering Blasting. Beijing: Metallurgical Industry Press, 2007.
[11] 王小林, 徐书雷, 吴枫. 国内外爆破拆除技术发展现状[ J] . 西安科技学院学报, 2003, 9(3) : 270-273.
WANG Xiaolin, XU Shulei, WU Feng. Current situation and development of demolition blasting at home and abroad[J]. Journal of Xi’an University of Science and Technology, 2003, 9(3):270-273(in Chinese)
[12] 武汉爆破有限公司. 武汉沌阳高架桥爆破拆除方案[R]. 2013.4.12.
[13] 中国工程爆破协会. GB6722-86爆破安全规程[S].
[14] 中国工程爆破协会. GB6722-2003爆破安全规程[S].
[15] 中国工程爆破协会. GB6722-2011爆破安全规程[S].