粘度时变浆液的水化机制及其在治理基坑涌水中的应用

Hydration Mechanism of Viscosity Time-varying Slurry and the Application in the Treatment of Water Gushing in Excavation

为了研究含助剂1号(纤维素类溶剂)、2号(合成硅钙早强剂)和3号(酰胺类稳定剂)的SJP型粘时变浆液的水化机制及其性能,通过引用温度、温变速率,进行SJP浆液与纯水泥浆的水化热对比试验,构建了SJP型粘时变型浆液的水化、硬化模型,揭示了2、3号助剂协调水泥二次水化的机理及助剂掺入依据。同时实验证明,SJP型粘时变浆液具有很好粘时变性,初配流动性好、可灌性强、初凝与终凝时间可控等良好特性,对于孔隙、裂隙发育地层及动水条件下注浆效果优于传统水泥浆,并在治理基坑涌水中得到了成功应用。

In order to study the hydration mechanism and the performance of SJP time-varying slurry with the admixture 1# （cellulose-based solvents）, 2#（ synthesis of silicon calcium early strength agent）and 3#（ amides stabilizer）, by referring the temperature and the rate of temperature variation, the hydration heat contrast test between SJP time-varying slurry and neat cement paste was made and the hydration and hardening models of SJP time-varying slurry were constructed to reveal the mechanism of admixture 2# and 3# coordinating the cement to the secondary hydration and the basis of admixture content. By the contrast test, it is proved that SJP time-varying slurry has good viscosity time variation, good initial fluidity, good grouting property and controllable initial setting time and final setting time etc. , the grouting effects should be superior to the traditional cement slurry in the strata where porosity and fracture develop and in dynamic water condition, SJP grouting material has been successfully applied in dealing with water gushing in excavation.