陕京二线输气管道工程张家湾黄河隧道的设计与施工

Design and construction of Zhangjiawan Yellow River tunnel in the project of the No.2 gas-transmitting pipe line from Shanxi to Beijing

文章介绍了张家湾黄河隧道的地质特征 ,叙述了隧道洞口、纵断面和衬砌结构的设计特点 ,以及掘进期间隧道涌水的防治方案。通过采用“超前探水 ,注浆堵水 ,微震爆破 ,短挖进尺 ,及时喷锚 ,后接衬砌”的施工总原则 ,不仅在隧道掘进期间防止了较大涌水的发生 ,确保了隧道的安全施工 。

The paper introduces the geological features of Zhangjiawan Yellow River tunnel and describes the design specialties of the portal, the profile and lining structure of the tunnel, and also the plan of prevention and treatment of water outburst during construction. Following the general construction principle: ”water exploration in advance, waterproofing by grouting, weak blasting, short excavation advance, timely shotcrete and lining”, not only water outburst was prevented, which ensured the construction safety, but also the construction speed was accelerated.