E chuan Yan

Work place: China University of Geosciences/ Faculty of Engineering, Wuhan, China

E-mail: yecyec6970@163.com

Website:

Research Interests: Materials Science, Engineering

Biography

E’chuan Yan was born in Mianyang, Sichuan province in 1969, and earned bachelor degree, master degree and doctor degree in geological engineering in Chengdu University of Technology in China respectively in 1990, 1995 and 1998, and is still studying in this field now. Dr. Yan is deputy director of Youth Committee of Engineering Geology in China, and association for Engineering Geology of Hubei Province. And he was awarded the leader of the subject of geotechnical engineering in China University of Geosciences in Wuhan.
He has worked for 2 years after undergraduate from 1990 to 1992 at Northwest Geological Team in Sichuan, and was a teacher in ChengDu University of Technology from 1995 to 1999, and was a post-doctoral and associate professor in China University of Geosciences in Wuhan from 1999 to 2001 and became a professor in 2003. He was a doctoral advisor in 2005 and continued to work on education in China University of Geosciences in Wuhan from then on. During this period he also cooperated with Hong Kong, Switzerland, Leica Geosystems Ltd in 2001 at the study of the monitoring of Landslide disaster. 

In 2005, got the title of “excellent instructor” in the 9th challenge cup university student extracurricular academic science and technology activities, "excellent teacher" in the sixth youth science, "excellent head teacher ", China university of geosciences 7th"ten outstanding youth" and so on. He took part in 30 projects or tasks since 1995, 3 of them are still on study and the rest were completed.
Since 1997, more than 34 papers or articles were published in the domestic and foreign public journals, including six papers for EI and ISTP retrieval. Other two articles won prizes:one article got the first prize for 2000, Chinese academy of sciences journal papers, the other got outstanding prize for 2002 the second national post-doctoral geological academic seminar. major writings includes: principles and applications numerical modeling in engineering geology( second author), the evaluation and utilization of engineering stability (the first author). Three achievements obtained provincial  rewards, a scientific and technological progress first prize awarded by Henan provincial water resources bureau, a scientific research achievements third prize in geology (ministry of land and resources), another for 2003 science and technology progress first prize of Hubei province. In November 2001, won first prizes of youth research group in China university of geosciences. 2008 got thesilver hammer prize。 
his major writings includes: principles and applications numerical modeling in engineering geology(Wuhan, China: press of China University of Geosciences, 2001 ,second author), the evaluation and utilization of engineering stability (Wuhan, China: press of China University of Geosciences, 2002,the first author). He has high attainments in landslide. He mainly engages in scientific research and teaching work on engineering geology, geotechnical engineering and environmental geological. Now he makes researches on geological hazard and geotechnical engineering design and evaluation on environmental protection and prevention. He especially does well in numerical modeling in engineering geology.

Author Articles
Stability Analysis and Evaluation of Soil Cave Foundation under the role of Groundwater in Karst Area

By E chuan Yan Jiangtao Cheng Li Liu

DOI: https://doi.org/10.5815/ijisa.2009.01.07, Pub. Date: 8 Oct. 2009

Soil cave foundation is a common type in the soil foundation in karst area, the stability of the foundation will be directly affected by the soil cave collapse destruction. Currently, the stability evaluation of soil cave foundation is mostly focus on the quantitative evaluation, such as the collapse mechanism and prevention, while the qualitative assessment is rare. Based on the plastoelasticity theory, firstly analyze the stress state of the soil cave wallsurrounding body in the foundation, distinguish the stress concentration influence area, then improve the soil cave foundation stability computation model by using Molecoulomb strength criterion, finally, take a soil cave foundation stability evaluation as the example in Tongren area, Guizhou, confirming the feasibility and reliability of the improvement model. The influence of the foundation bed size, buried depth, soil cave shape and groundwater level depth was further studied, which reveals the mechanism of the soil cave collapse destruction. And the research indicated that the improved model is feasible, when the foundation bed size is smaller, the buried depth is shallower, the hole shape is more spiky and the groundwater level depth is shallower, the soil cave stability coefficient will be bigger, which is more advantageous to the stability, and the influence of groundwater level depth is more sensitive to the soil cave stability, once the groundwater level depth dropped a little, the stable soil cave will become into failure and instability. Therefore, the quantitative evaluation should be paid more attention in soil cave foundation stability evaluation, particularly under the ground water environment, simultaneously, the calculation results, like soil cave foundation maximum size, the critical buried depth, the maximum water level buried depth, have the strong directive function to the soil cave foundation treatment and design.

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