不留保护层全断面预裂爆破在坝基开挖中的运用

Application of Full Face Blasting Without Leaving Protective Covering in the Construction of Dam Foundation

大朝山水电站坝基开挖，采用不留保护层全断面预裂爆破，一次开挖到设计开挖线的施工方法，施工质量符合规范、合同技术条款要求，保证了工期。

In the construction of the dam foundation of Dachaoshan Power Plant, The methods of full face blasting without leaving protective covering and excavating to the designed line at one time are adopted.In this way, the construction quality is up to the standard, according with the demands of the treaty technology and the time limit for the project is assured.