Special Subgrade Treatment And Route Selection Of Highway Construction Project In The Section Of Xiaocaohu-Turpan Section

In this paper, we research Xiaocaohu- Turpan section of highway in the national high speed highway network planning of the "five vertical and seven horizontal" trunk highway to Lianyungang-Huoerguos part of the highway(G30); 57712 high speed, high grade highway of Xinjiang Uygur autonomous region transportation planning a part of the cross; Is also the G30 Lian- Huo and G7 Beijing- new two important strategic position of trunk highway segment; Has been included in the "12th five-year" highway construction planning. Connect the Aletai, Beitun agricultural town and Fuhai county, is within the section of north-south trunk highways. Combined in this paper, we study the concrete road along the factors such as geology, geomorphology, hydrology, meteorology, expounds the harm of saline soil, and the special roadbed processing, the following conclusions:(1) the natural environment of the road is relatively complex, and the relationship between human, vehicle, road, construction and environment is considered, and the demand of traffic is met. Contrast is presented in this paper recommended route and compares the advantages and disadvantages of route that: scheme comparison, although it can more the G312 line, and is conducive to the Turpan city residents can more quickly on the highway, but the disadvantages are also obvious, and the cost is recommended scheme very much, so research group suggested the recommended scheme.(2) the road area of drought little rain, the high temperature in summer, the evaporation than precipitation of dozens of times, makes the soluble salt in the soil with capillary rise of water accumulation on the surface, the formation of a special area, depending on the species were scientific division of classified, the experiment measured the Road area of dry soil containing salt size. Finally, according to the special sections of saline soil subgrade processing.(3) after comparing and drawing on the experience of the country, with the salt content and salt content in the soil, the subgrade excavation and the old road use, the main choice of the gravel soil for filling, soil engineering cloth cut off, and reduce the water level of three methods of special subgrade treatment.