Technology and research progress of split grouting reinforcement

As an effective means of strengthening weak geological bodies, split grouting technology has played an important role in civil engineering, water conservancy and mining engineering. In view of the many innovative results achieved by the research on split grouting technology, the author explains and reviews these latest research progress in this paper. Firstly, the development process of split grouting and the calculation method of diffusion radius were analyzed, and then based on the basic principles of elastic-plastic mechanics, the mechanism of split grouting in fractured rock mass, the calculation method of split grouting pressure under the asymmetric load were considered, and the diffusion law of pulsating grouting slurry and the reinforcement effect of split grouting were summarized. Next, the split grouting was produced by experiment and the distribution law, the influence of “slurry-soil” coupling effect on the law of split grouting and the difference of split grouting effect of layered soil rock medium were explained.Finally, the dynamics of split propagation were further revealed by combining the numerical calculation of discrete element and finite element. The achievement of a series of innovative achievements in split grouting theory and experimental research will surely push forward the split grouting technology to the direction of fine management and fine quality.