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| 改性膨胀土路基受水特性 | |
| 引用本文： | 汪双杰,黄晓明,倪一鸿.改性膨胀土路基受水特性[J].交通运输工程学报,2004,4(1):15-20. |
| 作者姓名： | 汪双杰 黄晓明 倪一鸿 |
| 作者单位： | 1. 东南大学,交通学院,江苏,南京,210096;中交第一公路勘察设计研究院,陕西,西安,710075 2. 东南大学,交通学院,江苏,南京,210096 3. 中交第一公路勘察设计研究院,陕西,西安,710075 |
| 摘 要： | 研究了路基土场土的物理性能、矿物组成及胀缩特性，采用多种方法综合评价土场土膨胀潜势；通过多种配比的石灰改性方案分析，土样胀缩性能均有明显改变。以所选土场土填筑试验工程，观测自然受水条件下高压实度膨胀土路基受水特性，发现路基成型初期受水后，含水量急剧增加，压实度明显降低，强膨胀潜势层位出现在高压实区；90d后路基弯沉观测趋稳定，路基强度形成。结果表明弱-中性膨胀土石灰改性后填筑的路基，其受水影响主要表现在路基成型初期，自然失水干燥后路基强度逐步恢复。 |
| 关 键 词： | 道路工程 膨胀土路基 膨胀潜势 受水特性 |
| 文章编号： | 1671-1637(2004)01-0015-06 |
| 修稿时间： | 2003年11月27 |
Infiltrating properties of modified swelling soil subgrade |
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| WANG Shuang-jie.Infiltrating properties of modified swelling soil subgrade[J].Journal of Traffic and Transportation Engineering,2004,4(1):15-20. | |
| Authors: | WANG Shuang-jie |
| Institution: | WANG Shuang-jie~ |
| Abstract: | The physical properties, mineral composition and expansive-shrinkage characteristics of the borrow soil were studied, and the evaluation of expansive potential was carried out. The influence of lime-swelling soil by rainfall was analyzed. The results show that the expansion and shrinkage change obviously, the compaction degree lowers clearly and the strong expansive appears where the soil compaction is high. 90 days later, the subgrade deflection becomes stable, and reaches the required strength. As for the subgrade filled with improved light or mid lime-swelling soil, the influence of rainfall appears during the early days of the filled subgrade, and its strength will recovers continuously while the water content lowers naturally. 9 tabs, 5 refs. |
| Keywords: | road engineering swelling soil subgrade expansive potential infiltrating properties |
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