爆破挤淤水中冲击波对环境影响的安全评估与监测

Safety evaluation and monitoring of shock in water to surroundings due to squeezing soil by blasting

马迹山港扩建工程围堤采用爆破挤淤法施工,作业区周围环境复杂。为保证周围各构(建)筑物的安全和正常运行,在分析爆破挤淤水中冲击波作用特性的基础上,在施工初期进行了现场爆破模拟试验,实测了水中冲击波测线和保护目标处的水击波压力值,研究了水中冲击波的传播衰减规律,给出了水中冲击波的经验计算公式,并结合各构(建)筑物的结构特性,提出了相应的安全控制标准。通过施工期的安全监测和工程控制,确保了各被保护物的安全和正常运行。

The squeezing soil method by blasting was adopted in the construction of encircling embankment structure of Majishan Harbor. The surrounding was very complicated around the blasting area. In order to ensure the safety and normal operation of surrounding buildings and structures, the characteristics of shock in water due to squeezing soil by blasting had been analyzed, and a blasting simulation test at initial stages of blasting construction had been carried out. The pressure of measuring lines and protected buildings for shock in water was monitored. The propagation attenuation was obtained and an experimental calculation formula of shock in water was deduced. A safety control criterion for protecting buildings was put forward according to the structure characteristics of buildings and structures. By means of safety monitoring and controlling during construction period, all protected buildings were safe and operated normally.