摘要
西北地区风积沙天然黏结力低、水稳性差,为解决这一工程难题,通过室内重型击实试验、SEM微观分析及现场压实工艺验证,系统揭示了水泥改良风积沙的压实特性与作用机制。研究表明,水泥掺量在6%、含水量控制在最优含水量±1.5%、碾压厚度30cm、振动压实5遍时,压实度可达96.5%,较天然风积沙提升了12%,且基于正交试验建立的压实度预测模型与现场检测数据高度吻合。通过对风积沙进行水泥改良,为干旱半干旱地区风积沙路基工程提供了精细化控制方案。
The natural cementing force of aeolian sand in the northwest region is low and its water stability is poor.To solve this engineering problem,through the compaction test,SEM micro-analysis and field compaction process verification,the compaction characteristics and mechanisms of cement modified aeolian sand were systematically revealed.The study shows when the cement content is 6%,the water content is controlled within±1.5%of the optimum water content,the rolling thickness is 30cm,and vibration compaction is 5 times,the compaction degree can reach 96.5%,which is 12%higher than that of natural aeolian sand,the compaction degree prediction model established based on orthogonal experiment is in high agreement with the field detected data.By cement modification of aeolian sand,a refined control scheme is for the aeolian sand roadbed engineering in arid and semi-arid regions.
作者
韩桂冰
HAN Gui-bing(China Railway 14th Bureau Group 5th Engineering Co.,Ltd Jining,Shandong 272100,China)
出处
《浙江交通职业技术学院学报》
2025年第3期23-27,42,共6页
Journal of Zhejiang Institute of Communications
关键词
水泥改良
风积沙
正交试验
压实度
Cement modification
aeolian sand
orthogonal experiment
compaction degree
