Last modified: 2016-05-23
Abstract
Under the action of strong vibration load, the safety
threat of deep buried chamber is greatly increased,
bring serious challenges to the excavation of deep
underground engineering.Therefore, it is urgent to
carry out the research on the reinforcement and
vibration reduction of deep buried chamber.
Based on continuum mechanics of discrete element
method, the vibration reduction and reinforcement
of the rigid support and rigid flexible coupling support
deep buried chamber is studied.
Calculation results show that traffic vibration stress
wave effect on the top of the subway, approximate
"horns" shaped distribution, and have a wave effect
on the whole metro area; As strong energy storage
body, concrete segment can improve the passive
support strength, can also cause metro extrusion
deformation cracks under the vibration load conditions.
After set the concrete energy absorbing layer, seismic
waves which is in the vicinity of the metro bottom and
the propagation process have been effective
attenuation, the deformation of the soil around metro
tend to flatten and reduce, setting concrete energy
absorbing layer and increasing the strength of concrete
segment can greatly improve metro operation safety .