ICCM Conferences, The 7th International Conference on Computational Methods (ICCM2016)

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Suspension stability analysis of soil along the metro lines impact by strong vibrations traffic load
Xiangfeng Lv

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 .


Keywords


strong vibration transportation load; soil along the metro lines; concrete energy-absorbing layer; shock absorption; numerical studies

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