花岗岩残积土地质的爆破施工技术

Blasting Construction Technique for Granite Residual Land Mass

爆破施工作为隧道工程中使用最多的施工手段之一,目前已得到广泛的应用,本文以广州市某区间暗挖隧道爆破专项施工工程为依托,针对花岗岩残积土地质,介绍和分析了采用台阶法+临时中立柱法的隧道爆破施工技术,并进行了爆破振动校核。结果表明,台阶法+临时中立柱法可以很好地应用于花岗岩残积土的隧道工程。

Blasting construction as one of the most used in tunnel engineering construction means,has been widely used at present,this paper takes a Guangzhou cross’s special underground running tunnel blasting construction engineering,in view of the granite residual soil mass,introduced and analyzed using the method of step+temporary pillar method in tunnel blasting construction technology,and the blasting vibration check results show that the steps+temporary pillar method can well applied in the granite residual soil tunnel engineering.