某引水工程取水口围堰和预留岩坎拆除爆破

Demolition blasting for cofferdam and reserved rock ridge of intake in a water diversion project

某引水工程取水口前端预留岩坎与已建水库相连,距离取水口塔体和已建大坝较近,为确保周边建筑物安全,拆除时先进行预留岩坎迎水坡爆破剥离,减少其厚度,再对混凝土围堰和剩余预留岩坎进行分层分区拆除爆破。爆破施工中采取了有效的安全爆破控制技术措施,降低了施工难度,保证了施工质量,达到了预期的效果。通过分层分区拆除爆破,有效解决了围堰和预留岩坎在大型水库水下淹没深度较深且不需人为降低水库水位进行拆除爆破的难题,为今后类似工程积累了宝贵的经验。

The reserved rock ridge at the front of intake in a water diversion project is connected to the built reservoir,and it is close to the intake tower as well as the built dam,in order to ensure the safety of the surrounding buildings,demolition blasting of the reserved rock ridge on the water-facing slope is carried out first to reduce its thickness,and then the concrete cofferdam and the remaining reserved rock ridge are demolished by layered and zoned.Effective blasting control technical measures are taken during blasting construction,which reduce the construction difficulty,ensure the construction quality and achieved the expected results.Demolition by layered and zoned blasting effectively solves the problem that the cofferdam and reserved rock ridge have been submerged deep in large reservoir and don't need to artificially reduce the water level of the built reservoir for blasting demolition.All of them will contribute valuable experience to the similar projects built in the future.