Research on Composite Initial Support Method for Rich Water Weak and Large Deformation Highway Tunnel
In the process of highway construction,tunnel engineering has become a key link in project construction due to its particularity.In the early survey process,it was not possible to conduct detailed exploration of the geological conditions at the location of the tunnel,resulting in various situations such as abundant groundwater,high stress intensity,and large deformation during the construction process.This article takes the excavation of a highway tunnel in Yunnan as an example.During the construction process,the tunnel experienced phenomena such as abundant groundwater,weak surrounding rock,and large deformation.After conducting relevant technical research,it was decided to adopt a composite double-layer support method to control the deformation value of subsidence and groundwater outflow within an acceptable range for construction.It is intended to provide experience reference for similar projects.
highway tunnelrich water and weaklarge deformationcomposite support
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