Qinghai-Tibet Highway In Permafrost Regions Highway Disease And Treatment Strategies

Permafrost regions along Qinghai-Tibet Highway poor natural conditions, coupled with the road the following soil freezing and thawing, thermal state and the steady state of subgrade, type of subgrade Pavement is very complex and wide coverage, outstanding issues are: the financial foundation Shen deformation, frost heave and boil, pavement cracks and the surface of freeze-thaw damage resulting spalling, peeling, loose and other damage phenomena, thus affecting the normal life and function of the highway, causing premature failure due to increased human, financial, and material of the repeat inputs and waste.There is a need for this particular area of highway maintenance and repair technology to carry out research to continuously improve service quality frozen highway operations and road service life. For more scientific areas of permafrost Pavement road of scientific management, reasonable and timely maintenance of its repair, not only to develop the area for Pavement Maintenance and repair culverts and structures of new materials, new technology The new technology, but it is necessary to establish a set of road maintenance in permafrost areas of management information system to collect timely and in permafrost regions of the performance parameters of road maintenance, combined with computer technology, to create a dynamic database, its performancetimely evaluation, to facilitate the conduct of maintenance and repair.Qinghai-Tibet Highway has produced significant disease Permafrost Pavement characteristics, mainly due to the constraints of permafrost, the disease causes and frozen in permafrost special geological structure are inseparable, and along the high altitude, intense radiation is closely related to, and along the low temperature, temperature fluctuations in the frequent, quality of construction can not completely meet regulatory requirements related to overloaded by heavy traffic constantly aggravated by fatigue. These factors make the road, embankment and bridge structures are often in an unstable state, under a certain load, it is likely to cause unstable roadbed, pavement damage, bridge damage caused by the permafrost of western development with highway overload, roadbed damage is very serious. Roadbed in permafrost region of instability is often caused by damage to the main road, therefore, on the surface of roadbed in permafrost regions observed in real-time evaluation of disease and prompt adoption of reasonable and effective conservation and maintenance measures to protect its most excellent performance.