|
| | Abstract | | Dense and high-resolution geophysical surveys were conducted at an embankment slope of a mountain road situated in the heavy-snow region, Sapporo, Hokkaido. The surveys consisted of 3D resistivity measurements, surface wave survey, portable dynamic cone penetrometer testing, and pore water pressure monitoring. Stabilization work was to be implemented to the target slope mainly purposed for the groundwater discharge. We conducted the field measurements twice before the snow season in 2013, and just after the snowmelt season in 2014 when the slope surface had been scraped and protected with caged riprap. No obvious change was observed in the resistivity profile along the reference line set outside the stabilization work zone. In contrast, the resistivities distinctively increased in the groundwater discharged zone. Surface wave survey clearly delineated the deepening of embankment thickness at the surface seepage zone in the slope. In conclusion, small scale inhomogeneous structure in the embankment, which might cause irregular distribution in the slope stability, was clearly identified by means of dense and high-resolution geophysical survey. In addition, the periodic measurement was useful to evaluate the effect of slope stabilization work. |
|
|
|
| |
|