摘要
依托柞水至小河高速公路杨家湾隧道右线工程,针对隧道入口处围岩为强风化板岩,节理、裂隙发育、岩体破碎、围岩稳定性差等特点,提出"零埋深进洞",即"零开挖"的设计、施工理念。即按"早进洞、晚出洞"的原则,最大限度地缩小洞口施工对自然边仰坡原始植被的破坏程度,稳定边仰坡美化环境。工程实践证明,所提方法对于隧道洞口围岩条件较差的情况是比较适合的。
Based on the right line project of Yangjiawan Tunnel of Zhashui-Xiaohe Express Highway, in view of the characteristics of the heavily weathered surrounding rock at the entrance, such as jointing, crack, broken mass and low stability, this paper brings forward the concept ＂zero depth at entrance＂, or ＂zero excavation＂. According to the principle of ＂early entering and late exiting＂, this method tries to reduce the damage to the original vegetation on the slope and stabilize the slope to protect the environment. The practice in the project proves that this method is suitable for tunnel entrance with poor surrounding rocks.
出处
《石家庄铁道学院学报》
2008年第4期102-105,共4页
Journal of Shijiazhuang Railway Institute
关键词
零埋深进洞
隧道施工
大管棚超前支护
zero depth at entrance
tunnel construction
bassoon shed advance shoring
