BAI Hao, SU Qian, HUANG Jun-jie, et al. In-situ forced vibration tests on dynamic characteristics of non-embedded pile-board subgrade[J]. 2012, 33(12).
BAI Hao, SU Qian, HUANG Jun-jie, et al. In-situ forced vibration tests on dynamic characteristics of non-embedded pile-board subgrade[J]. 2012, 33(12).DOI:
In-situ vibration test of non-embedded pile-board subgrade needs to be carried out because this structure’s dynamic characteristics are quite different from normal subgrade. DTS-1 dynamic test system is used to test the vibration response
internal force and settlement of a subgrade section in Zhengzhou-Xi’an Passenger Dedicated Line. Result shows that sympathetic vibration will not happen in range of exciting frequency
and subgrade settlement mainly happens on loading plate and will be basically stable after 0.7 million times’ loading with a final settlement of 1.0mm after 1 million times’ loading. Comprehensive dynamic stiffness is related to thickness of board
span
piles and soil
which can provide well vibration characteristics and long-term dynamic stability for the combining structure of pile-board structure