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| Research on the Source Reduction of Vibration of Chengdu Museum Induced by Metro Running |
| YANG Wei - guo1，LI Ming - bin2，GU Shi - qi，WANG Ming - zhu3，ZHANG Nan1，MA Bo - tao3，WANG Meng1，GEJia - qi3 |
| (1. Beijing Jiaotong University， Beijing 100044， China; 2. Chengdu Museum， Chengdu， Sichuan 610000, China; 3. China Aviation Planning and Construction Development Co. Ltd，Beijing 100120，China ) |
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Abstract Research purposes: Chengdu Museum is close to metro line 2，so if the vibration reduction measures are not taken properly，the vibration induced by metro will adversely affect the normal use of the museum. Meanwhile，in order to meet the requirements of museum relics safety under metro vibration，based on the measured data， a three - dimensional finite element model of floating slab - tunnel - soil in MADIS/GTS is established. The tunnel wall vertical vibration is selected as a reference to measure the vibration attenuation effect of floating slab，the stiffness of steel spring and the thickness of tunnel wall. Research conclusions:(1) The floating slab could decrease vibration in high frequency band and increase vibration in low frequency band. When the stiffness of the steel spring is 6 900 kN/m，its comprehensive vibration attenuation effect is 12. 1 dB. (2) Reducing the stiffness of steel spring could effectively reduce the Z direction vibration of tunnel wall. When the stiffness of the steel spring is reduced from 9 000 kN/m to 3 000 kN/m，the Z direction vibration of tunnel wall is reduced by 5. 6 dB. (3 " Increasing the thickness of the tunnel wall could reduce the ! direction vibration of tunnel wall. When the thickness of the tunnel wall increase from 0. 2 m to 0. 8 m，the Z direction vibration of tunnel wall could reduce 2.7 dB，the effect is not obvious. (4) The research result can be applied on the source reduction of vibration induced by metro running.
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Received: 12 September 2015
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2016, Vol. 33 
