新疆沙漠公路升级改造工程勘察浅谈

Analysis of geological exploration for xinjiang desert road upgrading

新疆沙漠公路位于塔里木盆地,穿越流动沙漠。沿线主要地质问题为风沙、盐渍土及水毁路段,通过现场调查、分析、勘察、试验及老路病害研究,查明了沿线的工程地质条件,提出针对性的建议措施。

Xinjiang desert road, located in the Tarim Basin, goes across the desert of shifting sands. Many geological problems are encountered along the line, which are mainly related to wind-blown sand, soil salinity, and water-destroyed road sections. These problems are difficult and challenging, which are to be addressed in this paper. Specific mitigation methods and suggestions are proposed by in-site investigation, in-situ and laboratory testing, research on old road defects. Specific engineering geological conditions along the line are considered. Mitigation methods and suggestions are given as follows. For road sections mainly affected by strong wind-blown sand, it is recommended to protect existing shelter forests, such as to strengthen sand fixation on the windward side, and to reinforce local section. For road sections affected by saline soil, it is recommended to treat the subgrade and set up the barriers. For road sections affected by flood, it is suggested to go across the area from the upstream of alluvial fans. This is because damages in these sections are mainly due to the road location built on the edge of the alluvial fan, and it cannot solve the problem fundamentally.