超细水泥-水玻璃双液浆的性能研究及砂土注浆效果分析

Performance of Superfine Cement-Water Glass Double Slurry and Effect Analysis on Sand Grouting

通过析水率、凝结时间、流动度和结石体强度试验,对不同水灰比,不同波美度的超细水泥双浆液注浆材料进行了研究。结果表明:水灰比为0. 8∶1和1∶1的两种浆液析水较均匀,有更好的稳定性。当波美度相同时,随着水灰比的增大,双液浆的凝结时间变长,流动度增大,结石体的抗压强度减小。当水灰比相同时,随着波美度的增大,双液浆的凝结时间变短,流动度减小,结石体抗压强度变大,但波美度超过40°Bé时,对强度的增加效果不明显。通过进行注浆模型试验发现超细水泥双浆液对土体的各性能具有明显的改善作用,可以很好地满足砂土地层的加固止水要求,可以为类似的工程提供借鉴意义。

Through the tests of water precipitation rate,setting time,fluidity and stone body strength,the superfine cement double slurry grouting materials with different water-cement ratios and different Baume degrees were studied.The results show that the two slurries with water-cement ratios of 0.8∶1 and 1∶1 are more uniform and have better stability.When the Baume degree is the same,as the water-cement ratio increases,the setting time of the double slurry becomes longer,the fluidity increases,and the compressive strength of the stone body decreases.When the water-cement ratio is the same,with the increase of Baume degree,the setting time of the double slurry becomes shorter,the fluidity decreases,and the compressive strength of the stone becomes larger,but when the Baume degree exceeds 40°Bé,the increase of strength is not obvious.Through the grouting model test,it was found that the superfine cement double slurry has obvious improvement effects on the various properties of the soil,and it can meet the requirements for reinforcing and sealing water in the sand layer,which can provide reference for similar projects.