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| STUDY ON COLUMN PENETRATION GROUITNG MECHANISM BASED ON POWER-LAW CEMENT GROUTS OF TIME-DEPENDENT BEHAVIOR OF RHEOLOGICAL PARAMETERS |
| YANG Zhiquan1，HOU Kepeng1，YANG Bajiu2，CHENG Yong2 |
| (1. Faculty of Land Resources Engineering，Kunming University of Science and Technology，Kunming，Yunnan 650093，China；2. Yunnan Ya-rong Mining Technology Co.，Ltd.，Kunming，Yunnan 650093，China) |
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Abstract The rheological parameters of Power-law cement grouts are time-dependent，which have an important influence on grouting effects of practical projects. Carrying out theoretical analysis and experimental researches，the rheological equation and seepage motion equation for power-law cement grouts of time-dependent behavior of rheological parameters were established，then column penetration grouting mechanism about them were deduced. At the same time the scope of application，method to determine the parameters and design basis of the side grouting hole in the grouting pipe were analyzed respectively. Then they were validated by means of designing indoor grouting experiments. Experiment results show that equivalent transverse diffusion radius of actual measurement values in the indoor grouting experiments have about 20%-30% differences with that of theoretical values calculated by column penetration grouting mechanism based on Power-law cement grouts of time-dependent behavior of rheological parameters，but they are all within the acceptable error limits. Because the international and domestic researches on column penetration grouting mechanism based on Power-law cement grouts of time-dependent behavior of rheological parameters were seldom reported，therefore，research achievements may not only can play a reference guiding role for the theoretical research，design and construction on grouting technique，but also may provide strong theoretical basis for perfecting the penetration grouting mechanism.
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2015, Vol. 34 
