FINE CONTROLLED BLASTING TECHNOLOGY OF LARGE SECTION SHAFT UNDER COMPLEX URBAN ENVIRONMENT
Because of the complex surrounding environment and the proximity of residential areas and other highly sensitive buildings,blasting is a great construction risk when constructing underground projects in cities.The more strict requirements of blasting vibration speed in urban environment also bring slow progress and low blasting efficiency to the construction.Taking the blasting construction of large section shaft of Xiaogang station,the adjustment scheme of Qingdao metro line 2 phase Ⅰ project,as an example,the fine controlled blasting technology is proposed.Reasonable hole mesh parameters and high precision characteristics of digital electronic detonators are used to carry out blasting construction.Sadowski empirical formula calculation and vibration monitoring of test section show that the fine controlled blasting technology can effectively reduce blasting hazards.It provides reference for blasting construction of similar urban underground projects.
万方数据
维普
