浆液性质对注浆压力及扩散方式的影响规律

为研究浆液性质对于注浆压力及浆液扩散模式的影响规律,设计了注浆扩散模拟试验系统。该系统通过采用整体填土压实,相比常规人工分层填土压实,可有效避免土体内部层间界面的产生,从而避免层间界面对于浆液扩散的影响。通过上述注浆扩散模拟试验系统开展了羧甲基纤维素钠浆液(模拟渗透注浆)、水泥单液及水泥-水玻璃浆液的土体注浆试验,分析注浆压力及浆液扩散特征,并针对注浆压力进行理论分析验证。研究结果表明:浆液性质对于注浆压力增长及劈裂特征点具有显著影响,通过分析注浆压力增长趋势及劈裂特征点特征可判定浆液扩散模式。

The influence of grouting pressure and diffusion features of different grouting materials

A new grouting simulation device was developed to study the influence of property of grout slurry on grouting pressure and slurry diffusion. This device substituted overall filling and compaction of soil of layer-compacting to avoid the occurring of interlinear interface. Thus the influence of interlinear interface on slurry diffusion could be decreased. Grouting pressure and slurry diffusion of sodium carboxymethyl cellulose solution, simulating Newtonian slurry, cement slurry and cement-silicate slurry were studied by simulation experiment, and then validated by theoretical analysis. The results showed that property of grout slurry had remarkable influences on change laws of grouting pressure and splitting feature. Slurry diffusion pattern could be abstained by analyzing the change laws of grouting pressure in combination with splitting feature.