中文摘要：

针对云南地区红黏土在注浆工程中理论研究尚不成熟的现状,充分考虑注浆工程对浆液可灌注性的要求,以及对注浆材料性能优化以适应不同地质条件等,本文通过室内试验,对比研究不同水泥和速凝剂掺量对黏土水泥浆液性能的影响,试验时控制修正后原浆黏度在25~30 s之间,确定水泥掺量水平为5、10、15 g/100ml原浆,速凝剂掺量水平为1、3、6 g/100ml原浆。结果表明：黏土水泥浆液析水率随水泥掺量增加而增大,浆液稳定性降低,速凝剂掺量对浆液析水率影响不显著,试验中各组浆液析水率都小于5%,为稳定浆液;浆液的胶凝时间随速凝剂掺量变化从几十分钟至几秒钟可调,速凝剂掺量为3 g/100ml原浆时,黏土水泥浆液的胶凝时间最短,仅7 s;浆液结石率随速凝剂增加而增大,6 g/100ml原浆时出现膨胀现象,水泥掺量越多浆液结石体收缩越明显;黏土水泥浆液的渗透系数随着水泥掺量的增加而减小,速凝剂掺量对渗透系数影响不显著;对黏土水泥浆液结石体3天、7天、28天抗压强度进行分析,浆液结石体早期强度发展缓慢,后期增长较快,3天最小强度0.13 MPa,28天最大强度3.35 MPa,各试验组浆液结石体抗压强度均达到注浆材料要求。根据以上变化规律可以针对不同地质条件实现浆液的快速配置,有效提高对浆液注浆过程中可灌注性的控制,减少弃浆,降低成本。

英文摘要：

In grouting engineering, theoretical studies on the Yunnan red clay is immature yet. To adapt slurry grouting to different geologic conditions, the red clay properties could be improved and optimized with consideration of grouting requirements. In this study, a laboratory experiment was conducted and effects of different contents of cement and quick-setting agent on the performance of red clay cement slurry were examined and compared, using slurry viscosity in the range of 25-30 s, cement contents of 5, 10 and 15g /100 ml puree, and coagulant dosage levels of 1, 3 and 6g / 100 ml puree. The test results show that with the increasing cement content, slurry water rate increases and slurry stability is lowered but the effect of quick-setting admixture on slurry water rate is insignificant. In the experiment, slurry water rates for all the test sets were lower than 5% for slurry stability, and slurry gelation time with the agent dosage was adjusted in the range between a few minutes and a few seconds. The clay cement slurry gel time was the shortest of only 7 s when the agent content was 3 g/100 ml puree. The stone rate of slurry was increased with an increase in quick-setting admixture, and a swelling phenomenon occurred at the admixture of 6 g/100 ml puree. The more the cement content was, the more obvious the shrinkage of slurry stone body became. The permeability rate of the clay cement grout was decreased with an increase in cement admixture and it was insensitive to quick-setting admixture. An analysis on compressive strengths of theclay cement grout at the ages of 3, 7 and 28 days revealed that the grout stone strength grew slowly in earlier stage while fast in later stage, reaching the minimum strength of 0.13 MPa in three days and the maximum strength of 3.35 MPa in 28 days. And the compressive strengths of all the grout stone test sets were able to meet grouting requirements. The results above would provide a useful guide for practical grouting to achieve rapid preparation of slurry and slurry grouting in v