Zhijian Yi, male, born in 1963, professor, doctoral supervisor, vice President of Chongqing Jiaotong University, director of Engineering Research Center of Mechanical Sand Control and Ecological Carbon Sink, Ministry of Education. He is a young and middle-aged expert with outstanding contributions at the national level, the first and second level candidate of the national "Millions of Talents Project", the first level candidate of the "Ten Millions of Talents Project" of the Ministry of Communications, the first batch of academic and technical leaders and advanced workers of Chongqing, enjoying the special government allowance of The State Council, and winning the top ten "Most Beautiful Science and Technology Workers" in 2021. He has been engaged in the teaching and scientific research of mechanics, roads, Bridges, materials and other disciplines for a long time. He teaches the courses of Elasticity, Structural Mechanics, Elastoplastic Mechanics, Fracture and Damage Mechanics for undergraduates and postgraduate students. In the study of elastic-plastic fracture mechanics, a line field analysis method is proposed, which breaks through the traditional small-range yield condition. In the study of online elastic fracture mechanics, a crack line method is proposed to solve the stress intensity factor. In the study of cement concrete failure, "three basic failure forms between layers" and "transition layer" and their important influence are found, and the pavement structure with isolation layer is put forward. In the study of reinforced concrete structure, three crack control methods of "resistance", "release" and "resistance" and corresponding new structures are put forward. In the new generation of pavement research, the polymer cement concrete pavement material with remarkable deformability is proposed and developed, and the polymer (color) permeable noise reduction pavement is invented. In the study of slope stability, the fracture mechanics mechanism of reinforced soil stability and failure is proposed. In the study of granular matter mechanics, the mechanism of particle constraint determining granular matter state and the relationship between soil mechanical properties and ecological properties have been discovered, and the ecological restoration method of "desertification of soil" has been put forward, which has changed nearly 20,000 mu of oasis and produced a wide range of domestic and foreign influences. He has successively undertaken the research of the National Natural Science Foundation of China, the key project of the Ministry of Communications, the major science and technology research project of Chongqing and other projects, and won the first grade of provincial and ministerial science and technology progress 2, the second and third prizes. He has published more than 100 papers and has been included in SCI and EI for more than 50 times. Published 3 monographs; More than 40 domestic and foreign invention patents have been authorized.