中国沙漠地区风积沙路基强度参数试验研究--以塔克拉玛干、毛乌素沙漠公路为例

Research on Intensive Parameter of Eolian Deposit Subgrade in Desert Region of China——Take Taklimakan and Mu Us as Examples

在中国沙漠地区选取典型路段,对风积沙路基进行强度测定。通过现场承载板试验,并分析已有的各种资料,发现野外实测的风积沙路基回弹模量普遍较高,明显高于现行有关规范推荐的砂性土或土质砂的路基回弹模量建议值,高出部分多在30%以上,已经明显地对路基路面的结构设计产生了不利影响。在此基础上,为能充分利用风积沙的强度特性,降低沙漠公路造价,通过进一步分析,提出了中国各主要沙漠地区及不同等级公路的风积沙路基回弹模量设计值。

The typical sections of highways in major desert regions in China were selected to measure their intensity of the eolian deposit subgrade. Field test of plate-bearing and comprehensive analysis of datum dis- closed that the resilient modulus of the eolian deposit subgrade that obtained in actual measurement is gener- ally high, obviously higher than the value of resilient modulus that the existing norms advising. The most are 30 % higher than the advising value, and it causes disadvantageous influence to the structure designing of subgrade and pavement. Thus, in order to make full use of the intensity characteristics of eolian deposit and reduce the cost of road construction in desert region, this article has put forward the resilient modulus of the eolian deposit subgrade of different level highways in major desert region in China.