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针对高液限土填筑时质量难以达到规范要求的问题,以实际高液限土直接填筑路基工程为例,通过现场碾压试验、弯沉和沉降监测,分析了高液限土直接填筑路基的压实标准。研究表明:高液限土密实度与CBR强度曲线相分离,高液限土应在最大强度含水率时碾压,以84%作为该条高速公路高液限土的压实标准;在高液限土填筑前应加强对其特殊路用特性的认识,树立以提高和确保高液限土路基的长期稳定强度(CBR值)和稳定性为目标的填筑理念,高液限土具体的压实度标准需通过试验路和室内试验联合确定。这些研究成果可以为高液限土直接用于路基填筑提供技术支撑。
In order to solve the problem that the quality of high liquid limit soil is difficult to meet the standard requirements, taking the direct filling of subgrade with high liquid limit soil as an example, through field rolling test, deflection monitoring and settlement monitoring, Subgrade compaction standards. The results show that the density of high liquid limit soil is separated from the CBR intensity curve. High liquid limit soil should be crushed at the maximum strength moisture content, with 84% as the compaction standard of the high liquid limit soil of the expressway. Before landfill should be strengthened, it is necessary to strengthen understanding of its special road use characteristics and establish the concept of filling with the goal of improving and ensuring the long-term stability (CBR) and stability of high-liquid-limit soil subgrade. Compaction standards through the test road and indoor test jointly determined. These research results can provide technical support for high liquid limit soil directly used in roadbed filling.