Study on the construction sequence optimization of four-hole small net distance tunnel
With the development of high-grade highway in China,the scale of highway tunnel construction is getting bigger and bigger.Due to the limitation of some topographic and geological conditions,more and more small net distance group hole tunnels appear,such as four-hole small net distance tunnels.The determination of the optimal construction sequence of the four-hole tunnel is of great significance to control the construction safety and construction period.This paper based on a city supporting road(phase I)tunnel section of new engineering,using ABAQUS finite element software for small net distance group tunnel excavation sequence simulation,the surface settlement,surrounding rock deformation and plastic area evolution analysis,the conclusion shows that the excavation of the pedestrian tunnel and the middle car tunnel construction scheme for the optimal scheme.
highway tunnelsmall net distance group tunnelexcavation sequencenumerical simulationsurface settlementsurrounding rock deformation
NETL
NSTL
万方数据
