软弱岩体中疏水性聚合物的运移吸附及扩散传质机理研究

高分子渗透灌浆防渗加固软弱岩体的实质，是高分子浆液在软岩界面的运移吸附和软岩裂隙中的扩散传质过程。项目以疏水性聚合物为研究对象，拟将高分子渗透灌浆，假定为非混溶两相流，在低渗透饱和多孔介质中的运移吸附和扩散传质过程。通过融合交叉学科的“界面渗透理论”、“双膜理论”和“两相流扩散传质理论”，采用原位固体核磁共振成像、耗散型石英晶体微天平、微观孔隙CT三维成像和三维网络模型重构，实现高分子渗透灌浆的可视化研究。拟考察疏水性聚合物的分子微观力学性能，总结疏水性聚合物在岩体颗粒界面的吸附、解吸和动态成膜规律，探究疏水性聚合物以油滴形式在岩体微粒-结合水的固液膜相间的界面渗透机理，以及与结合水间的竞争性运移吸附机理，建立完整的疏水性聚合物在软岩介质内的运移吸附-扩散传质数学模型。以期为开发适合于软岩地层的高分子渗透灌浆材料、设备和施工技术，提供较系统的理论基础和科学依据。

Migration adsorption of polymer slurry in interface and diffused mass transfer in the fracture of the weak rock mass are the basic reason of polymer permeation grouting for the anti-seepage and reinforcement of the weak rock mass. This research project mainly focuses on the hydrophobic polymers. Polymeric permeation grouting is assumed to be the migration adsorption and diffused mass transfer of immiscible two-phase flow in saturated porous media with low permeability. This research project plans to achieve the visualization research on the polymeric permeation grouting by solid-state nuclear magnetic resonance imaging in situ, quartz crystal microbalance with dissipation, microscopic pore CT three-dimensional imaging and three-dimensional network model reconstruction by using the basic theories of interface seepage, two-film and two-phase flow diffusion mass transfer. The properties of molecular level and micro mechanics of the hydrophobic polymers are researched to study on the adsorption, desorption and dynamic film forming rule in the interface of rock mass particle. The interfacial penetration mechanism of the solid-liquid membrane between the rock particles and binding water as oil drop and the mechanism of competitive migration adsorption for the binding water are investigated to get the unified migration adsorption-diffused mass transfer mathematical model of the hydrophobic polymers in the weak rock mass. Through the study, the theoretical and scientific supports can be provided to research and develop the suitable polymeric permeation grouting materials, equipments and technologies for the weak rock mass.