The Study On Development Characteristic And Its Hazard Evaluation Of Ground Fissures Among The Da-Xi Express Railway In Taiyuan Basin

The number of Ground fissures occurred in the Taiyuan Basin has been increased to more than 80 since the last 3 decades, which also evolved to a major natural disaster in this area. The increasingly growing of ground fissures becomes a great hazard to the development of cities and people's lives.Ground fissure also developed as a non-avoidable geo-hazard as the undergoing construction of Datong-Xi'an express railway. The analysis and study of the characteristics and growing tendency of the ground fissures, evaluation of the future hazard of these fissures not only contributs to the express railway construction work, but also has achieved as some valuable references to the study of ground fissures in Taiyuan Basin.This paper is based on intensively field studies and data analysis of the ground fissures. Deeply studied the distribution and development characteristics of those ground fissures among the Da-Xi Express Railway in Taiyuan Basin,were discovered and the mechanisms of the movement are being discussed. The major reason for the growth of the ground fissures is that due to the large quantities of subsurface water that being used and explored, the tectonic plate under those fissures are being disturbed, hence those fissures will continuously growing and enlarging in the future. Finally, fuzzy mathematics technique is being used to evaluate the influences to the express railway construction. The hazardous rankings of each ground fissure among the express railway area are presented and a recommendation velocity of the fissure's movement is also included.