为分析有机-无机复合注浆材料在高温环境中的流变特性与适用性，以水玻璃、甘油和催化剂为A组分，以异氰酸酯、塑化剂、阻燃剂为B组分，制备双组分水玻璃改性聚氨酯注浆材料。首先，通过开展不同温度条件下浆液固化时间及黏度测试，分析双组分质量比与温度对新型注浆材料固化时间的影响，并研究浆液黏度时变规律与温度响应规律； 然后，建立水玻璃改性聚氨酯浆液的流变本构方程，结合材料的化学反应原理与微观试验对浆液固化机理进行分析。结果表明： 1）浆液固化过程中黏度随时间呈指数形式增长，温度升高可加快浆液的反应进程，据此建立统一时间与温度的水玻璃改性聚氨酯浆液流变本构方程； 2）不同温度下水玻璃改性聚氨酯浆液的固化时间随质量比的变化趋势相近，考虑质量比与温度的影响，拟合得到浆液固化时间方程； 3）水玻璃中的游离水与异氰酸酯反应释放CO₂，Na₂SiO₃吸收CO₂生成Na₂CO₃和原硅酸，原硅酸进一步脱水缩聚形成SiO₂或硅酸盐沉积相，与聚脲/聚氨酯有机基体共同构成有机-无机复合结构。

To analyze the rheological characteristics and applicability of organic-inorganic composite grouting materials in high-temperature environments, a two-component water glass-modified polyurethane grouting material is prepared, with water glass, glycerol, and catalyst as Component A, and isocyanate, plasticizer, and flame retardant as Component B. First, the curing time and viscosity of the slurry under different temperature conditions are tested; meanwhile, the influence of the two-component mass ratio and temperature on the curing time of the new grouting material is analyzed, the time-varying pattern of slurry viscosity and its temperature response characteristics are studied. Then, the rheological constitutive equation of the water glass-modified polyurethane slurry is established. The solidification mechanism of the slurry is analyzed based on the chemical reaction principle of the material and microscopic experiments. The results demonstrate the following: (1) During the curing process, the viscosity of slurry increases exponentially with time, and the increase in temperature accelerates the reaction process of the slurry, thus establishing a unified rheological constitutive equation for the water glass-modified polyurethane slurry considering both time and temperature. (2) Under different temperatures, the curing time of the water glass-modified polyurethane slurry shows a similar trend with the change of the two-component mass ratio. Considering the effects of mass ratio and temperature, a fitting equation for the slurry curing time is derived. (3) The free water in the water glass reacts with isocyanate to release CO₂, and Na₂SiO₃ absorbs CO₂ to form sodium carbonate (Na₂CO₃) and orthosilicic acid. The orthosilicic acid further undergoes dehydration and polycondensation to form SiO₂ or silicate deposition phases, which together with the polyurea/polyurethane organic matrix constitutes an organicinorganic composite structure.