Permafrost Environmental Problem in the Construction of the Qinghai-Tibetan Railway
WANG Zhi\|jian~ 2,\ ZHANG Lu\|xin~ 1, 2 (1.Qinghai-Tibetan Railway Construction Management Center, Geermu Qinghai 816000, China; 2.College of Resource and Environment, Lanzhou University, Lanzhou Gansu 730000, China)
Permafrost environmental problem is one of the three key technology problems in the construction of the Qinghai-Tibetan Railway. The problem is involved with the engineering quality of the Qinghai-Tibetan Railway and the safety of its operation in the future. It is necessary to deeply study the interaction of railway construction and permafrost environment, in order to provide the railway with technological sustain for its safety operation.\;Aimed at directing and modifying design, and at ensuring the railway quality, it is required to make a diagnostic study of the climate change in permafrost areas on the Tibetan Plateau, a study of the changing trend of permafrost, and a realistic estimation of the stability of permafrost environment. Thus one can theoretically judge the long\|term stability of engineering construction and the resistibility against heat effect.\;When a shape of structure in design and construction is adopted, its adaptability under rising temperature in the future and its influence on permafrost environment must be thought over. Heat influence on construction must be considered. At present, it is urgent to study the design parameter of ventilation pavement with piece rock, and to study the stability of roadbed under changing temperature, and to forecast the period and intensity of the influence of the heat in construction on permafrost.\;The integrated effect of other temporary projects, highway, pipeline of petroleum, communication cable is also needed to study.\;Effectively restricting the negative effect of construction and avoiding the long\|term and irreversible influence on permafrost environment are the construction departments own responsibilities.\;When the railway in operation in the future, heat will be appeared, influencing on permafrost, which must be earnest treated. The domino effect of environment due to the interaction of permafrost and engineering building must be lucubrated, in order to ensure the railway operating for a long\|term in safety especially in permafrost areas.
【CateGory Index】： P642.14