Using Seismic Cross-Hole Method to Evaluate Soil Improvement for Outside Wall in Al-Abbas Holy Shrine in Holy Karbala, Iraq

Abstract

The aim of this study is to use the seismic cross-hole survey in evaluating the injection work to fill the cavities spread in the soil underneath the old foundation of the outer wall of the Al-Abbas holy shrine. A seismic cross-hole survey was conducted for eight profiles, four of these are applied before grouting and four profiles are done after grouting at Al-Imam Musa Al-Kadhum and Al-Imam Sahib Al-Zaman gates. Using the longitudinal and shear wave velocities for different depths ranging from 1 to 15 m. The results of the survey indicate that the soil injection process was successful and effective in filling the cavities. The results of cross- hole survey after the grouting show the percent of variation is 0.7-77 percent for seismic shear wave velocity more than before grouting to variant depths.