武汉交通学校群楼爆破拆除塌落振动分析
|
摘要
为了分析一次性爆破拆除多栋建筑造成的地面振动的特征及对周边建筑物的影响,对武汉交通学校群楼爆破拆除中的地面振动进行了测量,并对实测的塌落振动的峰值、频谱特性进行分析。结果表明:此次监测记录到的峰值频率在5～10 Hz,对比高架桥以及单一高层结构爆破拆除数据,倒塌叠加使得振动能量在频谱上分布更加离散,其峰值频率与周边结构自振频率相差变大,周边建筑共振的危险性降低;对于周围的结构而言,水平振动持时大于竖向振动,但水平振动幅值明显小于竖向振动;爆破塌落振动的竖向分量对周围结构的威胁较大,应采取有效的缓冲及隔振措施;由《爆破安全规程》和周边建筑爆破前后主振频率分析可知,本次爆破拆除工作未对周边建筑造成破坏性影响,验证了群楼爆破拆除方案的高效性和安全性。
In order to analyze the characteristics of ground vibration caused by demolition of several buildings by one-off blasting and its influence on surrounding buildings, the ground vibration during blasting demolition of a group of buildings in Wuhan Jiaotong School was measured, and the peak value and spectrum characteristics of the measured collapse vibration were analyzed. The results show that the peak frequency is 5～10 Hz, comparing with the demolition data of viaduct and single high-rise structure, collapse superposition makes the distribution of vibration energy more discrete in frequency spectrum, the difference between predomination frequency and natural frequency of surrounding structure becomes larger, and the danger of surrounding building resonance is reduced; For the surrounding structures, the duration of horizontal vibration is longer than that of vertical vibration, but the amplitude of horizontal vibration is obviously smaller than that of vertical vibration; The vertical component of blasting collapse vibration is a great threat to the surrounding structure, so effective measures of buffering and vibration isolation should be taken. According to the "blasting safety regulations" and the main vibration frequency analysis of surrounding buildings before and after blasting,which verifies the high efficiency and safety of the blasting demolition scheme,the blasting demolition work has not caused destructive effect on surrounding buildings.
In order to analyze the characteristics of ground vibration caused by demolition of several buildings by one-off blasting and its influence on surrounding buildings, the ground vibration during blasting demolition of a group of buildings in Wuhan Jiaotong School was measured, and the peak value and spectrum characteristics of the measured collapse vibration were analyzed. The results show that the peak frequency is 5～10 Hz, comparing with the demolition data of viaduct and single high-rise structure, collapse superposition makes the distribution of vibration energy more discrete in frequency spectrum, the difference between predomination frequency and natural frequency of surrounding structure becomes larger, and the danger of surrounding building resonance is reduced; For the surrounding structures, the duration of horizontal vibration is longer than that of vertical vibration, but the amplitude of horizontal vibration is obviously smaller than that of vertical vibration; The vertical component of blasting collapse vibration is a great threat to the surrounding structure, so effective measures of buffering and vibration isolation should be taken. According to the "blasting safety regulations" and the main vibration frequency analysis of surrounding buildings before and after blasting,which verifies the high efficiency and safety of the blasting demolition scheme,the blasting demolition work has not caused destructive effect on surrounding buildings.
引文
[1] 王毅刚, 岳宗洪. 工程爆破的发展现状与新进展[J]. 有色金属(矿山部分), 2009, 61(5): 40-43.WANG Yigang, YUE Zonghong. Development status and new progress of engineering blasting[J]. Non-fertous Metals(Mine Part), 2009, 61(5): 40-43.(in Chinese)
[2] 贾金河, 于亚伦. 国外拆除爆破的现状[J]. 爆破, 1998(2): 37-41.JIA Jinhe, YU Yalun. Recent development of explosive demolition abroad [J]. Blasting, 1998, 15(2): 37-41.(in Chinese)
[3] 汪旭光. 中国工程爆破与爆破器材的现状及展望[J]. 工程爆破, 2007, 13(4): 1-8.WANG Xuguang. Present situation and prospect of engineering blasting and blasting materials in China[J]. Engineering Blasting, 2007, 13(4): 1-8.(in Chinese)
[4] 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): 1-4.ZHOU Jiahan. Discussion on calculation formula of collapsing vibration velocity caused by blasting demolition [J]. Engineering Blasting, 2009, 15(1): 1-5.(in Chinese)
[5] 庞维泰, 杨人光, 周家汉. 秦皇岛—控制爆破工程总结[J]. 爆炸与冲击, 1984(4): 40-47.PANG Weitai, YANG Renguang, ZHOU Jiahan. Qinhuangdao-summary of controlled blasting engineering [J]. Explosion and Impact, 1984 (4): 40-47.(in Chinese)
[6] 周家汉, 陈善良, 杨业致, 等. 爆破拆除建筑物时震动安全距离的确定[J]. 爆破, 1993, 10(s2): 165-169.ZHOU Jiahan, CHEN Shanliang, Yang Yezhi, et al. Determination of safe vibration distance in demolition of buildings by blasting [J]. Blasting, 1993, 10 (s2): 165-169.(in Chinese)
[7] 徐鹏飞,褚怀保,张英才. 冷却塔在高卸荷槽切口下爆破拆除振动数值分析[J]. 工程爆破, 2014, 20(4): 11-14.XU Pengfei, CHU Huaibao, ZHANG Yingcai. Vibration numerical analysis of cooling tower blasting at high unloading slot incision [J]. Engineering Blasting, 2014, 20(4): 11-14.(in Chinese)
[8] 李明. 大型高架桥爆破拆除塌落触地对地面振动影响分析[J]. 路基工程, 2016(2): 175-178.LI Ming. Analysis of the impact of collapse on ground vibration in blasting demolition of large viaduct [J]. Subgrade Engineering, 2016(2): 175-178.(in Chinese)
[9] 杨永强,刘琎,姚颖康,胡进军. 武汉市二七沿江商务区楼房爆破拆除塌落振动分析[J].工程爆破, 2018, 24(2): 21-26.YANG Yongqiang, LIU Jian, YAO Yingkang and HU Jinjin. Vibration analysis of building demolition by blasting in Erqi Business District of Wuhan [J]. Engineering Blasting, 2018, 24 (2): 21-26.(in Chinese)
[10] 孙金山,谢先启,贾永胜,等. 建(构)筑物拆除爆破塌落触地振动预测模型研究[J]. 工程爆破, 2014, 20(2): 25-28.SUN Jinshan, XIE Xianqi, JIA Yongsheng, et al. Forecast model of peak vibration velocity induced by the collapse of structure in demolition blasting projects [J]. Engineering Blasting, 2014, 20(2): 25-28.(in Chinese)
[11] Huang W , GOULD, Phillip L . 3-D pushover analysis of a collapsed reinforced concrete chimney[J]. Finite Elements in Analysis & Design, 2007, 43(11): 879-887.
[12] Han-Soo Kimm Jae-Gyun Ahn, Hyo-Seong Ahn. Computational simulation of progressive collapse of reinforced concrete rigid frame with reinforcement contact model [J]. Advances in Structural Engineering, 2016, 19(6): 982-994.
[13] 杨永强, 胡进军, 谢礼立, 等. 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 Yongqiang, HU Jinjun, XIE Lili, et al. Analysis of Vibration Velocity characteristic of Viaduct Blasting Demolition[J].Vibration and Impact, 2016, 35 (11): 151-154.(in Chinese)
[2] 贾金河, 于亚伦. 国外拆除爆破的现状[J]. 爆破, 1998(2): 37-41.JIA Jinhe, YU Yalun. Recent development of explosive demolition abroad [J]. Blasting, 1998, 15(2): 37-41.(in Chinese)
[3] 汪旭光. 中国工程爆破与爆破器材的现状及展望[J]. 工程爆破, 2007, 13(4): 1-8.WANG Xuguang. Present situation and prospect of engineering blasting and blasting materials in China[J]. Engineering Blasting, 2007, 13(4): 1-8.(in Chinese)
[4] 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): 1-4.ZHOU Jiahan. Discussion on calculation formula of collapsing vibration velocity caused by blasting demolition [J]. Engineering Blasting, 2009, 15(1): 1-5.(in Chinese)
[5] 庞维泰, 杨人光, 周家汉. 秦皇岛—控制爆破工程总结[J]. 爆炸与冲击, 1984(4): 40-47.PANG Weitai, YANG Renguang, ZHOU Jiahan. Qinhuangdao-summary of controlled blasting engineering [J]. Explosion and Impact, 1984 (4): 40-47.(in Chinese)
[6] 周家汉, 陈善良, 杨业致, 等. 爆破拆除建筑物时震动安全距离的确定[J]. 爆破, 1993, 10(s2): 165-169.ZHOU Jiahan, CHEN Shanliang, Yang Yezhi, et al. Determination of safe vibration distance in demolition of buildings by blasting [J]. Blasting, 1993, 10 (s2): 165-169.(in Chinese)
[7] 徐鹏飞,褚怀保,张英才. 冷却塔在高卸荷槽切口下爆破拆除振动数值分析[J]. 工程爆破, 2014, 20(4): 11-14.XU Pengfei, CHU Huaibao, ZHANG Yingcai. Vibration numerical analysis of cooling tower blasting at high unloading slot incision [J]. Engineering Blasting, 2014, 20(4): 11-14.(in Chinese)
[8] 李明. 大型高架桥爆破拆除塌落触地对地面振动影响分析[J]. 路基工程, 2016(2): 175-178.LI Ming. Analysis of the impact of collapse on ground vibration in blasting demolition of large viaduct [J]. Subgrade Engineering, 2016(2): 175-178.(in Chinese)
[9] 杨永强,刘琎,姚颖康,胡进军. 武汉市二七沿江商务区楼房爆破拆除塌落振动分析[J].工程爆破, 2018, 24(2): 21-26.YANG Yongqiang, LIU Jian, YAO Yingkang and HU Jinjin. Vibration analysis of building demolition by blasting in Erqi Business District of Wuhan [J]. Engineering Blasting, 2018, 24 (2): 21-26.(in Chinese)
[10] 孙金山,谢先启,贾永胜,等. 建(构)筑物拆除爆破塌落触地振动预测模型研究[J]. 工程爆破, 2014, 20(2): 25-28.SUN Jinshan, XIE Xianqi, JIA Yongsheng, et al. Forecast model of peak vibration velocity induced by the collapse of structure in demolition blasting projects [J]. Engineering Blasting, 2014, 20(2): 25-28.(in Chinese)
[11] Huang W , GOULD, Phillip L . 3-D pushover analysis of a collapsed reinforced concrete chimney[J]. Finite Elements in Analysis & Design, 2007, 43(11): 879-887.
[12] Han-Soo Kimm Jae-Gyun Ahn, Hyo-Seong Ahn. Computational simulation of progressive collapse of reinforced concrete rigid frame with reinforcement contact model [J]. Advances in Structural Engineering, 2016, 19(6): 982-994.
[13] 杨永强, 胡进军, 谢礼立, 等. 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 Yongqiang, HU Jinjun, XIE Lili, et al. Analysis of Vibration Velocity characteristic of Viaduct Blasting Demolition[J].Vibration and Impact, 2016, 35 (11): 151-154.(in Chinese)