塘坝边坡开挖中的爆破设计与施工

Blasting design and construction during excavation of dam or pond slope

2022年冬奥会延庆赛区A部分场馆配套基础设施———造雪引水系统工程施工项目位于北京市延庆区张山营镇小海坨山地区。针对1050m高程塘坝边坡两岸山体岩性以燕山晚期侵入花岗岩为主的情况,故采用爆破形式进行开挖。对开挖过程中采用的预裂爆破、深孔梯段爆破、浅孔爆破进行设计,同时对相应的施工方法进行介绍,旨在为后续遇到同类问题提供参考。

As one of the counterpart facilities of Competition Area A of Beijing 2022 Winter Olympics, the snowmaking system is placed at Xiaohaitou mountainous areas in Yanqing District of Beijing City. Blasting is selected for excavation since the Yanshan late invasion granite dominates the mountain rock at both banks of dams or ponds at an elevation of 1050m. Designing has been made to pre -crack blasting, deep hole ladder blasting and shallow -hole blasting, together with introduction of construction methods, in order to provide a reference for dealing with similar situations.