Details

Autor(en) / Beteiligte

• Gao, M.
• Xu, X.
• Chen, Q.S.
• Wang, Y.

Titel

Reduction of metro vibrations by honeycomb columns under the ballast: Field experiments

Ist Teil von

• Soil dynamics and earthquake engineering (1984), 2020-02, Vol.129, p.105913, Article 105913

Ort / Verlag

Barking: Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Environmental vibrations induced by subway operation are harmful to human health and structures when they exceed a certain value. Therefore, effective measures should be taken to reduce the noise and vibration generated by the metro. Therefore, a method to reduce the vibration by the installation of honeycomb Duxseal-cement columns under the ballast is presented in this paper. A honeycomb Duxseal-cement column was embedded in the subgrade of Qingdao Metro Line 13. A field test to measure the vibration of Qingdao Metro Line 13 was conducted. In addition, the time history curve of the vibration acceleration was obtained by processing the data and a Fourier transform was conducted for the test data to obtain a corresponding frequency spectrum curve. The spectrum curve was then converted into the one-third octave spectrum. Finally, the average value of the frequency vibration levels was determined. The comparison between the vibration generated by the metro filling and non-filling Duxseal-cement columns was investigated in detail. The test results show that the subgrade of metro in-filled by the Duxseal-cement columns obtains a better isolation effect than that of non-filling Duxseal-cement columns. The honeycomb Duxseal-cement columns present in the metros decrease their vibration accelerations in three directions, the X-, Y-, and Z-directions, by 33%, 28%, and 40%, respectively, compared with the original. •Vibration reduction effectiveness for metro by Duxseal-cement is investigated.•Field test characterized Duxseal-cement with good wave absorption capability.•Vibration characteristics of ground vibrations due to metro were analyzed.