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Non-Intrusive Evaluation Of Submarine Tunnel Foundation Using Dynamic High-Frequency Surface Wave Prospecting
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 12th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, Mar 1999, cp-202-00008
Abstract
The dynamic surface wave prospecting technique was used in the non-intrusive evaluation<br>of the foundation quality of the Yongjiang River submarine tunnel. The prospecting results<br>show that the overall strength of the foundation is high enough to meet the designed<br>standard, however, there do exist low velocity heterogeneities. One possible reason for the<br>occurrence of low velocity zones is the disturbance of the river water and mud during the<br>process of mortar consolidation. The interface between the mortar layer and the<br>underlying gravel layer can not be well resolved. The results from the surface wave<br>technology have been confirmed by other methods such as the physical modeling<br>simulation and prospecting using body waves.