摘要
选用离子土壤固化剂对南阳强膨胀土进行改良,对强膨胀土改良前后的物理性质进行试验研究。研究结果表明:强膨胀土经离子土壤固化剂改良后,其液限、塑限和塑性指数均有所下降,但对液限和塑限的改变量并不同步,对液限的改变量较塑限大;不同配比离子土壤固化剂改良强膨胀土的自由膨胀率均有下降,最大可降低43.4%,改变率为34.31%。通过对改良前后强膨胀土体表面裂隙的演化过程分析发现,离子土壤固化剂能够较好地抑制强膨胀土体表面裂隙的扩展。
The paper conducted the experiment on the improvement of the strong swelling soil in Nanyang with the help of ionic soil stabilizer ( ISS) . A before-after comparison study was carried out afterwards for the physical property of the soil and the results indicate that the application of the ISS lower the liquid limit,plastic limit and plasticity index of the soil. It is worth mentioning that the changes on the liquid limit and the plastic limit did not take place simultaneously,and the variation of liquid limit exceeded that of the plastic limit. At the same time,the differently-proportioned stabilizer led to the decrease of the free swelling rate,with the sharpest drop stood at 43. 3% and the variation reached 34. 31%. The analysis on the fracturing process of the improved strong swelling soil shows that ISS can effectively restrain the expasion of the cracks.
出处
《铁道建筑》
北大核心
2013年第11期92-95,共4页
Railway Engineering
基金
高等学校博士学科点专项科研基金(20120145110014)
