Consolidation effect of splitting grouting on earth dam
1.Geotechnical and Structural Engineering Research Institute, Shandong University, Jinan, Shandong 250061, China; 2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 3.Civil and Construction College, Shandong University of Science and Technology, Qingdao, Shandong 266510, China
Abstract：To investigate the consolidation mechanism of splitting grouting for earth dam, the advanced FLAC3D method based on 3-D explicit finite difference method was used to analyze the stability of a certain dam during splitting grouting according to strain hardening model and fluid-solid-coupled theory. The distribution regularities of pore pressure and stress level in dam were analyzed in three stages of grouting, non-grouting and re-grouting. The diffusion shape of pore pressure and features of stress level along different path were investigated to discover the consolidation mechanism of splitting grouting and to evaluate the dam stability. The results indicate that the slurry of splitting grouting is diffused to arround field with grouting axial line as middle line, and forms symmetrical distribution. With the increase of grouting times, the pore pressure in dam deduced by slurry penetrating is increased with enhanced diffusion field. The splitting grouting can effectively solve the internal problems in dam, which improves the stress and increases the impermeable effectiveness.
2012, Vol. 33 
