The Site Management Of Road Maintenance Project In High Altitude Area At Low Temperature

Permafrost subgrade is located in the special natural climate environment,so the subgradedisease is increasing by human activities and global climate change.Due to the differencedestruction mechanism and form from the permafrost roadbed to the general,there are avariety of disease prevention control measures produced.These measures divided to twokinds:the one is to deal with from the root causes of disease,and the other one is from theexternal performance.The former kind measure has a good treatment effect fundamentally,butthe engineering cost is higher, and at the same time, the disease cannot be suppressed in ashort term.The second kind measure can have effect immediately,but it easy to cause therepeat treatment and the maintenance fund waste.The prevention and control technology of frozen soil roadbed disease is got promotion bymultiple disease,this paper introduces the new treatment technology operation steps,problemswhich needs attention and site management of the permafrost roadbed disease preventioncontrol in recent years.The treatment methods of subgrade longitudinal crack,thawcollapse,slope and slope toe waterproof and slope freeze-thaw loose is mainly summary.Longitudinal crack will change the treatment measures of irrigation seam and flexiblebeam.Choose the way of flexible beam combine with tenon type geomembrane bag.This waycan repair the pavement damage,and restrain the expansion of cracks through the stronglateral force of constraint.Ananalysis the advantages and disadvantages of hot rod subgradeand ventilation tube subgrade which is usually used in deal with thawing settlement,thecement gravel mixing trenchless is improved to process soil roadbed thawing settlement in thetreatment.At the same time,slope geotextile seepage control technology is combined toincrease the treatment effect,and prevent the deterioration development of thawing settlementdeformation.Aim at the problem of slope and slope toe are easy to hydrops water,this paperadopted two prevention ways,the one is soil stabilizer and the other is flag combines withgeotextile,then analyzes the different application conditions of the two measures respectively.