摘要
由于高炉渣颗粒粒径大、级配性能差,某地基换填工程通过掺拌粉煤灰、碾压及重锤夯实对高炉渣进行了填料改良。通过对填料颗粒分析表明:碾压与重锤夯实的分层厚度合理;改良后的填料级配得到了改善,填料物理改良效果良好;因细颗粒含量不足,填料化学改良效果不良。填筑体内部孔隙组成及其对压实质量的影响分析表明,土体的粒间孔隙体积与土体总体积的比值作为压实质量评价的孔隙率指标更加合理,并提出了采用蜡封法测定高炉渣颗粒内部孔隙的相关计算公式。
Large particle size and bad grading performance are the characters of the blast furnace slag. One of the replacement method for foundation treatment project has improved the filler of the blast furnace slag by blending coal ash,compacting and heavy tamping. Particle size analysis result shows that,compacting and heavy tamping stratified thickness is reasonable. Grading performance of the filler has been improved and the physical improvement effectiveness is favorable. For the insufficient of fine particles, the chemical improvement effectiveness is not favorable. The analysis of the gap composition for the filling foundation and how it influences the compaction quality shows that,the ratio of the volume of gap among particles to the total volume of the filler used as the index of porosity is more reasonable. Besides,relevant computational formulas for the inner pore of blast furnace slag particles by the wax-sealing method have been given.
出处
《地下空间与工程学报》
CSCD
北大核心
2016年第1期256-261,共6页
Chinese Journal of Underground Space and Engineering
基金
内蒙古自然科学基金(2013MS0730)
关键词
高炉废渣
重锤夯实
填料改良
地基处理
blast furnace slag
heavy tamping
filler improving
foundation treatment
