摘要
为提高千枚岩路基填料水稳定性,采用振动压实试验方法研究了压实度、水泥对水稳定性的影响规律。结果表明:随干湿循环作用次数增加,千枚岩崩解量呈现线性递增趋势、耐崩解性指数呈现线性递减趋势;随压实度增长,千枚岩渗透系数逐渐减少、耐崩解性增强,压实度达到96%以上时渗透系数趋于稳定;水泥改良千枚岩可有效降低渗透系数,与素千枚岩相比,渗透系数至少下降了67. 8%(水泥改良千枚岩C)或15. 2%(水泥改良千枚岩A),且改良前后崩解速率比值(水稳定性)随水泥掺量增加而增大。建议通过采用提高压实度或水泥改良等措施以提高千枚岩路基填料水稳定性。
In order to improve water stability of the subgrade filler of phyllite,vibration compaction test was used to study the law how the compaction degree and cement influence the water stability thereof.The results show that,as the number of wetting and drying cycle increases,the amount of disintegration presents a linear increasing trend,while the disintegration resistance index presents a linear decreasing trend;as the degree of compaction increases,the permeability coefficient of phyllite reduces gradually and the disintegration resistance performance enhances,when the degree of compaction is more than 96%,the permeability coefficient tends to be stable;the phyllite improved by cement may reduce the permeability coefficient and,compared to original phyllite,the permeability coefficient decreases at least by 67.8%(for cement-improved phyllite C)or 15.2%(for cement-improved phyllite A);moreover,the ratio of disintegration rate before and after improvement(i.e.water stability)increases with the cement content.It is advised to enhance the degree of compaction or to use cement improvement to increase the water stability of phyllite subgrade.
作者
王翰越
范人杰
蒋应军
WANG Hanyue;FAN Renjie;JIANG Yingjun(Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang an University,Xi an 710064,China;Jinhua Communications Planning&Design Institute Co.,Ltd.,Jinhua 321110,Zhejiang,China)
出处
《路基工程》
2018年第6期74-79,共6页
Subgrade Engineering
基金
陕西省交通运输厅科技项目(13-02k)
关键词
道路工程
千枚岩
振动压实
水泥改良
水稳定性
road engineering
phyllite
vibration compaction
cement improvement
water stability
作者简介
王翰越(1994-),男,山东青州人。硕士研究生,研究方向:路基路面。E-mail:2041287377@qq.com。
