Study On The Key Technology Of Morass Permafrost Subgrade Of Qinghai-Tibet Railway In Tanggula Mountain Area

After investigating the engineering geology in the north of Tanggula Mountain in Qinghai-Tibet Plateau,study on the key technology which is attributed to principle and engineering measure on stability of morass permafrost embankment is carried through on the basis of reference of the literature about such area in the paper.Through analyzing the mathematics model on morass permafrost embankment,comparing the information about temperature and deformation from test section with that from entity embankment,and forecasting the future temperature on the base of information from field observation,the influences on the stability of morass permafrost embankment are put up,thus,the key technology about construction which is attributed to foundation treatment to ensure the stability of morass embankment,the effect of measure of engineering structure is laid emphasis upon.The issue of stability of morass permafrost embankment could be divided two parts,namely,entire stability of embankment and deformation in order to ensure train operate normally.Consequently,underpinning at bottom of the foundation and the other measures which can raise the artificial permafrost table or reduce the ground temperature are key measures to ensure stability of the morass permafrost embankment on the basis of above two aspects.Similarly,it is important guarantee to insure the stability of such embankment for the mating construction in morass areas.