毛乌素沙漠地区重载铁路路基风积沙填料特性和压实系数研究  

Research on Features and Compaction Coefficient of Subgrade Aeolian Sand Filling for Heavy Haul Railway in Mu Us Desert

作　　者：刘城[1] 吴广陵[2] 张艳召 杨有海[1] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070 [2]新疆生产建设兵团第四建筑安装工程公司,乌鲁木齐830000 [3]新疆北新土木建设工程有限公司,乌鲁木齐830000

出　　处：《路基工程》2016年第6期138-142,共5页Subgrade Engineering

摘　　要：依托蒙华重载铁路第二标段工程建设，对毛乌素沙漠地区风积沙的工程特性及不同影响因素下路基填料的压实系数进行了试验研究。结果表明：该段风积沙填料属c组填料，可用于基床以下路基的填筑；其最优含水率为14％，最大干密度为1．79g／cm3；摊铺厚度为35—45cm，当含水率为12％-16％时，装载机碾压6遍＋压路机静压2遍收面的碾压组合最为经济合理，此时松铺系数约1．3～1．4；提出了保证风积沙路基压实质量的措施。The experimental research was carried out for engineering properties of aeolian sand in Mu Us desert and the compaction coefficient of filling subgrade under different influencing factors based on the construction of western Inner Mongolia to central China heavy haul railway. The results showed that： this section of the aeolian sand belongs to group C filling and can be filled in the subgrade under the roadbed. The optimal moisture content is ld %, and the maximum dry density is 1.79 g/cm3 , and the paving thickness is 35 - 45 cm. When the moisture content is 12 % - 16 %, loader is rolling 6 times at first, and then roller is rolling 2 times with static pressure, which is most economical and reasonable. At this time, the loose paving coefficient is about 1.3 - 1.4. Measures were put forward to ensure the compaction quality of subgrade filling by aeolian sand.

关 键 词：风积沙填料 重载铁路 压实系数 含水率 影响因数 

分 类 号：U416.166[交通运输工程—道路与铁道工程]