| 考虑干湿循环效应红砂岩路基填料分类方法初探 |
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| 引用本文： | 何斌,邱洲,王云,付伟,张晶,张静波.考虑干湿循环效应红砂岩路基填料分类方法初探[J].路基工程,2021,0(2):45-50. |
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| 作者姓名： | 何斌 邱洲 王云 付伟 张晶 张静波 |
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| 作者单位： | 1.中交第二公路勘察设计研究院有限公司，武汉 430056 |
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| 摘 要： | 考虑运营期路基湿度变化对填料性能的影响，通过干湿循环试验和承载比（CBR）试验，定义了干湿循环强度衰减指数K，结合崩解试验，提出了一种基于干湿循环强度衰减指数K和崩解特性的红砂岩填料分类方法。依托鄂西地区某高速公路工程，测试了9处不同红砂岩填料崩解性与干湿循环强度衰减指数，分析得出红砂岩填料分类指标与标准；结合干湿循环效应分类指标和规范要求的CBR值标准，明确了不同类型红砂岩填料在路基结构中的适用范围和技术要求。
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| 关 键 词： | 路基填料 分类方法 红砂岩 干湿循环 强度衰减指数 |
| 收稿时间： | 2020-10-23 |
Preliminary Study on Classification Method of Red Sandstone Subgrade Filler Considering Dry-wet Cycle Effect |
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| Abstract: | Considering the influence of subgrade humidity change on the performance of filling materials during operation period, the dry-wet cycle strength attenuation index K is defined through dry-wet cycle test and California Bearing Ratio (CBR)test. Combined with disintegration test, a classification method of red sandstone filler based on dry-wet cycle strength attenuation index K and disintegration characteristics is proposed. Based on the highway project in Western Hubei Province, the disintegration index and dry-wet cycle strength attenuation index of nine different red sandstone fillers were tested, and the classification indexes and standards of red sandstone fillers were obtained. Combined with the classification index of dry-wet cycle effect and CBR standard, the application scope and technical requirements of different types of red sandstone filler in subgrade structure are defined. |
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