The present application relates to a kind of construction methods suitable for
denudation hilly land tunnel, comprising the following steps: making roof water interception gutter, layered excavation side slope from top to bottom, open
cut excavation, making entrance large
pipe shed support;Making tunnel body long
pipe shed support, making advance small guide
pipe support, burying monitoring survey point, taking advance geological forecast and geological
verification work, tunnel excavation;Initial support, radial grouting, curtain grouting, laying waterproof layer, secondary lining, construction
ditch cable trough, tunnel pavement.The present application carries out reinforcement treatment to surrounding rock by radial grouting and curtain grouting water plugging measures, ensures smooth passing through fault
fracture zone;When construction through granite residual soil and completely weathered, strong weathered rock, tectonic
fissure, rock broken section, do advance support well, control collapse, ensure construction safety;When construction, take advance geological forecast and geological
verification work, and strengthen surrounding rock metamorphic monitoring, overcome the harm brought by adverse geological conditions.