机械凿岩在疏浚工程中的应用

为解决疏浚工程中硬质夹层不能或不宜采用炸礁处理方案的问题,以安哥拉罗安达SONILS石油服务基地项目基槽挖泥为例,研究了机械凿岩在疏浚中的应用。通过分析现场实施条件,理论分析选择合适的锤形、锤重、自由落高、凿岩点布置等相关施工参数并加以试验和改进,提出采用凿岩锤和打桩船凿岩的最佳处理方案。实施过程中注意钢丝绳和锤尖的磨损加固以及凿岩棒尖的封闭。结果表明机械破碎后的硬岩层可由抓斗挖泥船轻松清理,具有良好的经济效益,可为后续类似项目起到一定的借鉴作用。

Application of mechanical rock breaking method in dredging project

In order to solve the problem of hard rock layer in dredging,which cannot be or is not suitable to be treated by blasting,this paper takes Angola Luanda SONILS quay wall project as an example,and stndies the application of mechanical rock breaking method in dredging.Based on the analysis of the practical conditions in the field,this paper puts forward the best treatment scheme for rock breaking by using rock hammer or piling barge,and selects the appropriate construction parameters such as hammer shape,hammer weight,free fall height and arrangement of rock impact points through theoretical analysis,and makes experiments and improvements.In the process of implementation,attention should be paid to the wear and reinforcement of the steel wire and hammer tip as well as the sealing of the pile tip.The results show that after mechanical breaking,the hard rock layer can be easily cleaned by grab dredger,has good economic benefits,and may serve as reference for the similar project.