太长高速公路双壁石方路堑硐室加预裂一次成型爆破

The Blasting of Chamber and Pre-split on Stonework Cut with Double-wall Were Conducted in One Operation for Taichang Expressway

继高边坡分台阶一次成型技术成功后，在太（太原）-长（长治）高速公路进行了双壁石方路堑应用研究。在地质条件较差的条件下，选择合理爆破参数和施工工艺，成功地应用了双壁路堑硐室加预裂爆破技术，快速地完成石方施工任务。对类似工程具有一定的推广应用价值。

After the success of technique in one operation for high slope and steps, the application researched on stonework cut with double-wall was introduced by us in Tai （Taiyuan）-Chang （Chang Zhi） expressway. Because the reasonable blasting parameters and technique were used, the construction completed rapidly under the condition of poor geologic. Problems for the side slope stability and blasting quality in chamber blasting were solved, furthermore, non-trimming and non -bottom-cut and blasting molding in one operation were obtained.