Research On Cost Indicators Of Pavement Construction Of Expressway Of Mountain Area

China is a mountainous country, Mountainous area accounts for 70% of the total area. With the gradual in-depth highway construction, Mountain highway will be our next major content of highway construction. Mountains because of the terrain geologic conditions and road alignment constraints, dig deep, high fill embankment root out is widespread, engineering design, construction and management are very difficult,result in the obviously higher cost than the same scale plain highway. In order to accurately understand the cost of mountain highway construction project in different conditions, to reflect the actual situation of highway construction projects, to accurately grasp the law of mountainous highway construction cost, control the key link of project cost, to help the management departments making economical comparison and analysing and evaluation, the paper analysed mountain highway construction cost index system and application.Based on the scope,nature and data sources of object index, According to the scope, the item of index are divided into the individual projects, unit works, sub-part of the project, according to the nature,the index are divided into technical specifications, engineering quantitative indicators, cost index and weight coefficient,according to data sources,the index are divided into primitivism index and statistical index,constructed mountain highway pavement typical construction costs index system, provided the tools for the cost management and construction units to better grasp the technical mountain highway economic conditions;and analysised the characteristics of mountain highway pavement engineering from design, construction organizations and cost, Selected subgrade earthwork projects, protection works, drainage works and road works as typical projects, And further analysed the typical engineering content and characteristics, Select the corresponding part of the typical sub-project construction cost index system as the basic items.,initially constructed the mountainous highway pavement typical engineering cost index system.Based on the two-stage construction design and engineering bill data of Yun-Wu highway,calculated and analysed the Pavement typical mountain highway economic index system,calculated the cost index in accordance with the height and level of high slope,and give the recommended vlues of the slope protection cost index.