沉井刃脚岩壁的处理

Rock Wall Treatment for Cutting Edge of Open Caisson

以渝怀铁路阿蓬江大桥深水基础钢沉井施工为例,介绍了深水钻岩爆破技术在沉井刃脚岩壁处理中的应用。详细说明了爆破方案的选择、参数设计等,分析了实际爆破效果。施工结果表明,深水钻岩爆破技术安全性高、效益明显,是解决大高差河床中沉井稳定性问题的有效手段之一。

Based on the steel open caisson construction for Apengjiang Bridge in Yuhuai Railway Project, this paper gives a detailed introduction of the application of deep - water drilling and blasting technology in the treatment of the rock wall of the open caisson The selection of blasting scheme and parameter are explained in detail, and the effect of blasting is analyzed. The result of construction shows that the deep - water drilling and blasting technology provides high security and evident benefit, and therefore is one of the effective measures to solve the stability problem of open caisson on inclined riverbed.