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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1.79 g/cm3;摊铺厚度为35~45 cm,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。
Based on the construction of the second section of Menghua heavy haul railway, the engineering characteristics of aeolian sand and the compaction coefficients of subgrade fillings under different influencing factors were studied. The results show that this section of aeolian sand packing belongs to Group C packing, which can be used to fill the subgrade below embankment. The optimum moisture content is 14%, the maximum dry density is 1.79 g / cm3 and the paving thickness is 35 ~ 45 cm , When the moisture content of 12% to 16%, the loader rolling 6 times + pressure roller roller 2 times the surface of the rolling combination is the most economical and reasonable, this time the shop factor of about 1.3 to 1.4; proposed to ensure Aeolian sand Subgrade compaction quality measures.