报告摘要：

Red sedimentary rocks account for about 8.61% of the China’s land surface, with weathered red mudstones (WRM) being the dominant type. Due to concerns about the embankment problems caused by moisture slaking , such as long-term settlement and untreatable mud pumping, railway companies are currently not allowed to use these WRMS as embankment fills, particularly in the top layer. To address the increasing demand for a reliable waterproof WRMs layer in new railway constructions, experimental tests and DEM simulations were conducted to investigate the XRD, SEM, moisture invasion behaviors, and coarse-grained particle slaking of WRM. Carbon fiber-reinforced bionic MPS, PTFE, and OCT waterproof WRM layers were developed and tested in the laboratory. In addition, centrifuge model tests and full-scale field tests are motivated to obtain reliable results. This study aims to demonstrate the viability of using local WRM fills to achieve cost savings, environmental protection, and reduced CO2 emissions for CHINA RAILWAY in the coming years.

Short Bio

Dr. Chen is currently serving as a full professor and the director of the geotechnical engineering department at Central South University. Dr. Chen’s research is in the field of railway geotechnics, with a particular focus on coarse-grained soils, including dilation and rheology behaviours, railway embankment (coarse-grained soil fills) design, and foundation protection of existing railway infrastructures. With 16 years of experience at Central South University, he has completed over 60 research projects and published over 190 peer-reviewed journal papers. Dr. Chen serves as a member of the International Society for Soil Mechanics and Geotechnical Engineering,TC202, and the Transportation Research Board (TRB) for years. Dr. Chen enjoys working with academics from diverse backgrounds and cultures.