[1]李源①,吴立①,彭亚雄②,等.水下钻孔爆破冲击波下桥墩的动态响应及防护分析[J].爆破器材,2019,48(01):58-64.[doi:10.3969/j.issn.1001-8352.2019.01.011]
　LI Yuan,WU Li,PENG Yaxiong,et al.Dynamic Response and Protective Analysis of Bridge Pier to Shock Wave in Underwater Drilling Blasting[J].EXPLOSIVE MATERIALS,2019,48(01):58-64.[doi:10.3969/j.issn.1001-8352.2019.01.011]
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水下钻孔爆破冲击波下桥墩的动态响应及防护分析()
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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
48
期数:
2019年01
页码:
58-64
栏目:
爆破技术
出版日期:
2019-01-18

文章信息/Info

Title:
Dynamic Response and Protective Analysis of Bridge Pier to Shock Wave in Underwater Drilling Blasting
文章编号:
5303
作者:
李源①; 吴立①; 彭亚雄②; 朱彬彬①; 谢达建③
①中国地质大学（武汉）工程学院（湖北武汉，430074）
②湖南科技大学岩土工程稳定控制与健康监测湖南省重点实验室（湖南湘潭，411201）
③长江重庆航道工程局（重庆，400011）
Author(s):
LI Yuan①;  WU Li①;  PENG Yaxiong②;  ZHU Binbin①;  XIE Dajian③
①Faculty of Engineering,China University of Geosciences (Hubei Wuhan, 430074)
② Hu’nan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hu’nan University of Science and Technology (Hu’nan Xiangtan, 411201)
③ Changjiang Chongqing Waterway Engineering Bureau (Chongqing, 400011)
关键词:
水下钻孔爆破; 水中冲击波; 动态响应; 气泡帷幕; 防护
Keywords:
underwater drilling blasting;  shock wave in water;  dynamic response;  bubble curtain;  protection
分类号:
TV542+.5
DOI:
10.3969/j.issn.1001-8352.2019.01.011
文献标志码:
A
摘要:
利用数值模拟方法以及现场监测技术，结合砖灶子水下炸礁项目，研究了水下钻孔爆破水中冲击波对桥墩的影响以及防护，对水中冲击波作用下桥墩结构的动态响应以及气泡帷幕的削减效果进行对比分析，并结合现场监测数据，对李家沱大桥的动态响应以及安全状态做出评价。研究发现：桥墩结构对水中冲击波的动态响应在桥墩中部及桥趾部位较大，且迎爆面的响应大于背爆面，测量点的速度与加速度响应最大值均出现在水平径向，然后是垂直方向和水平切向；气泡帷幕对于水中冲击波的削减效果良好，且距离保护对象5 m时效果最佳。运用气泡帷幕防护及现场监测指导施工，使得李家沱大桥处于安全状态下。
Abstract:
Combining with underwater drilling blasting reef project in Zhuanzaozi, numerical simulation methods and on-site monitoring techniques were used to study the influence of shock wave in underwater drilling blasting on piers and preventive measures. Dynamic response of pier structure to shock wave in water and reduction effects of bubble curtain have been analyzed in comparison. Combining with on-site monitoring data, dynamic response and safety status of Lijiatuo Bridge has been evaluated. Results show that, the dynamic response of the pier structure to shock waves in water is larger in the middle of the pier and at the toe, and the response of the explosive face is larger than the back face. The maximum velocity and acceleration response appear in the horizontal radial direction, then the vertical direction and the horizontal tangential direction. When the distance between bubble curtain and the protected object is 5m, the weakening effect could be the best. Bubble curtain protection and on-site monitoring were used to guide the construction, making the Lijiatuo Bridge in a safe state.

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备注/Memo

备注/Memo:
收稿日期：2018-10-05
基金项目：国家自然科学基金项目（41672260）
第一作者：李源(1991－ )，男，硕士，主要从事水下爆炸理论及技术的研究。E-mail：cugliyuan@163.com
通信作者：吴立(1963－ )，男，博导，教授，主要从事地下及爆破工程技术研究。E-mail：lwu@cug.edu.cn
更新日期/Last Update: 2019-01-18