预裂爆破与气泡帷幕技术在水下爆破中的应用

摘要

为减少水下爆破施工对附近建筑的不利影响 ,讨论了采用预裂爆破、气泡帷幕等减振、防护措施的可行性 ,并以大连长兴岛大船重工船坞坞口周边炸礁工程为例进行详细说明.实践结果表明 ,在进行钻孔爆破时 ,采用预裂爆破、气泡帷幕等减振、防护措施可以对爆破地震波及水击波实施控制 ,把爆破影响降到建筑安全容许的范围内 ,保证了附近30万t级船坞和修船码头的安全 ,达到了预期效果 ,可为类似工程提供参考.%In order to reduce the negative impact on nearby buildings of underwater blasting ,the feasi-bility of vibration reduction and protection measures such as presplitting blasting and air bubble curtain were introduced in the reef blasting of Chang-xing island heavy shipyard in Dalian .Results showed that seismic wave and water surge could be controlled and reduced by the allowable range with presplitting blas-ting and air bubble curtain ,the 30 millions tons-shipyard and ship repairing dock were protected well ,and the expected results were achieved .It could provide an experience for other similar engineerings .