Ninghui Liang，female，born in 1971 in Xinchang，Zhejiang Province． Associate Professor， Ph． D．，Master's supervisor． She is mainly engaged in the teaching of concrete structure and the application of polypropylene fiber concrete in underground structure engineering． As a principal researcher，she has completed five scientific research projects such as the National Natural Science Foundation and the Natural Science Foundation of Chongqing Municipal Science and Technology Commission． Among them，she won the first prize for scientific and technological progress of the Ministry of Education (ranked fifth)，and published more than 25 academic papers．