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对于高液限土(包括改良的高液限土)填筑的路堤只用单一的压实度指标控制常常易导致质量隐患。通过试验研究提出一个采用空气率V_a和压实度D_c双指标控制高液限土路堤填筑质量的方法,并给出了具体的控制标准。当压实度控制指标D_c≥93%时,高液限黏土和粉土空气率控制标准为4%≤V_a≤8%,含砂高液限黏土和粉土空气率控制标准为6%≤V_a≤13%。通过系统的试验研究,验证了双指标质量控制的可行性和有效性。研究结果表明,采用空气率和压实度双指标控制,不仅可以保证高液限土填筑路堤的强度和刚度,而且具有较好的水稳定性,为进一步充分利用高液限土作为路堤填料提供了技术支持。
For embankments filled with high-liquid-limit soil (including improved high-liquid-limit soil), only a single compaction index control often leads to quality problems. A test method to control the filling quality of embankment with high liquid limit embankment using air index V_a and compaction degree D_c is proposed and the specific control standards are given. When the control index of compaction degree D_c≥93%, the control standard of air rate of high liquid limit clay and silt is 4% ≤V_a≤8%, and the control standard of sand content, high liquid limit clay and silt air rate is 6% ≤V_a ≤13%. Through the systematic experimental research, the feasibility and effectiveness of dual index quality control are verified. The results show that the use of air index and compaction index control can not only ensure the strength and stiffness of embankment filled with high liquid limit soil but also have good water stability. In order to further utilize the high liquid limit soil as embankment filler Provided technical support.