邻近既有线土石方控制爆破技术应用

摘要

The construction technology of partition wall reserving was exploited to pull groove for loosening controlled blasting on a large number of earth and rocks between the reserved partition wall and the final slope,and then the weak loosening or crack blasting method on earth and rocks inside the reserved partition wall was carried out to demolish the earth and rocks near existing railway.The loosening controlled blasting was adopted near existing railway,which avoids individual flying rock and rolling stones from affecting the existing railway and ensures the traffic safety by building sandbag walls to prevent blasting rolling stones on the slope,covering the blast-hole with sandbags according to the distance from the existing railway,and coveting the blasting area with waste rubber and protecting net.%利用顸留隔墙的施工工艺,先对隔墙与最终边坡间的大量土石方进行拉槽松动控制爆破,再对预留隔墙土石方进行弱松动或龟裂爆破,采解决邻近既有线的土石方爆破开挖问题.对邻近既有线的土石方爆破,采用松动控制爆破,通过堆码沙袋墙来防止边坡爆破滚石、根据离既有线距离的远近给炮孔覆盖沙袋、给爆区覆盖废胶皮及安全网等安全防护措施,避免了个别爆破飞石和滚石影响既有线,保证了既有线的行车安全.