Stabilization of railway subgrade by lime-flyash slurry injection

澳大利亚的铁路网为通勤者和货物运输提供了一条主要的交通路线。铁路轨道路基应对上覆的压载物和封顶层提供足够的支撑。因此，较差的路基总是会导致轨道问题，包括轨道不平整、压舱物污染和轨道错位。本项目将详细研究注入石灰粉煤灰浆体改善路基土的基本机理和关键参数。该项目将在实验和数值模拟的基础上，开发一种改进的石灰粉煤灰浆液注入设计程序。

The rail network in Australia provides a major transport route for commuters as well as transportation of goods. The subgrade of railway track should provide adequate support for the overlying ballast and capping layers. Hence, a poor subgrade always results in track problems associated with uneven track, fouled ballast, and misalignment of the track. This project will investigate in detail the fundamental mechanisms and key parameters involved in the improvement of subgrade soil by injecting lime-flyash slurry. This project will develop an improved design procedure for lime-flyash slurry injection in the field based on experimental and numerical modelling.