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Non-Intrusive Evaluation Of Submarine Tunnel Foundation Using Dynamic High-Frequency Surface Wave ProspectingNormal access

Authors: Tieshuan Guo and Lanbo Liu
Event name: 12th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems
Session: Use Of Seismic Surface Waves
Publication date: 14 March 1999
Organisations: EEGS
Language: English
Info: Extended abstract, PDF ( 620.98Kb )

Summary:
The dynamic surface wave prospecting technique was used in the non-intrusive evaluation
of the foundation quality of the Yongjiang River submarine tunnel. The prospecting results
show that the overall strength of the foundation is high enough to meet the designed
standard, however, there do exist low velocity heterogeneities. One possible reason for the
occurrence of low velocity zones is the disturbance of the river water and mud during the
process of mortar consolidation. The interface between the mortar layer and the
underlying gravel layer can not be well resolved. The results from the surface wave
technology have been confirmed by other methods such as the physical modeling
simulation and prospecting using body waves.

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