Key technologies of precision demolition blasting of ultra-long urban viaduct in complicated surroundings  

作　　者：Xie Xianqi Jia Yongsheng Yao Yingkang Sun Jinshan Wu Xinxia Liu Changbang 

机构地区：[1]Wuhan Municipal Construction Group Co. Ltd., Wuhan 430023, China [2]Wuhan Blasting Engineering Co. Ltd., Wuhan 430023, China [3]The Changjiang River Scientific Research Institute, Wuhan 430014, China

出　　处：《Engineering Sciences》2014年第6期71-79,共9页中国工程科学（英文版）

摘　　要：The key technologies of precision blasting were put forward based on the characteristics of urban via- duct blasting demolition in complicated surroundings. Initial bending instability mechanics model of reinforcing steel bar frame of blasting fragmented pier and sequenced collapsed dynamic model were established for quanti- tative blasting design. Technologies of water pressure blasting were applied in multi-cell box girder fragmenta- tion. The detonating network of non-electric duplication crossover was adopted for the safety and reliability of ultra-long delay. The rationality of blasting scheme and parameters were validated by physical model test. Harm- ful effects were forecasted and controlled by integrated protective technologies. Specialization, cooperation, pre- cision, execution （SCPE） project management method was put forward for precision management. The key tech- nologies of precision demolition blasting can provide reference for similar proiects.

关 键 词：VIADUCT blasting demolition precision blasting instability model detonating network harmfuleffects control 

分 类 号：TU746.5[建筑科学—建筑技术科学] TV542[水利工程—水利水电工程]