粉细砂地层中泥水平衡盾构的泥浆配比研究
Study on Slurry Ratio of Sludge-Water Balance Shield in Fine Silty Sand Formation

目前我国泥水盾构中使用的泥浆材料主要以膨润土为基础，还存在各种聚合物复合膨润土、堵漏剂、增粘剂、分散剂、造浆剂等，多达数十种，由于泥浆配置是影响本工程掘进面稳定性的主要原因，所以需要通过现场数据的采集及相关室内土工试验，调整泥浆中水、膨润土、CMC、纯碱等的不同配合比，确定盾构在细砂地层中掘削过程中的最佳泥浆配料，以保证掘进面开挖过程的稳定。
At present, the mud materials are mainly used in the shield on the basis of bentonite. There are all kinds of polymer composite bentonite, plugging agent, viscosifier, dispersing agent, paste agent and so on, as many as dozens of. Because the mud configuration is the main reason affecting the stability of this engineering excavation face, I need through the field data collection and related laboratory soil test, adjust the water in the mud, bentonite, CMC, soda ash and other different mixing proportion, determine the shield in the fine sand strata dug in the process of cutting the best mud ingredients, to ensure the stability of excavation face excavation process.