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以南宁市友爱路高液限土为研究对象,针对我国南方多雨地区的实际情况研究了此类高液限加固土的长期水稳定性。通过改变击实含水量,分别在不浸泡、浸泡4d和浸泡45d的情况下进行CBR试验,然后与未加固土进行对比,研究分析加固土在不同浸泡时间、不同击实含水量条件下的长期水稳定性规律。研究发现:加固土的强度相对于未加固有了很大的提高;在击实含水量高于最优含水量的4%时,长期浸泡条件下强度最大,水稳定性最好。土体破坏时表现出一定的脆性,击实含水量越低土体的脆性越大,在含水量为24%时脆性最小,在选择击实含水量时应考虑土体脆性的影响。一定时间内随时间的增加CBR值会增大,石灰加固高液限土长期水稳定性是能得到保证的。这些结论对南方多雨地区高液限土路基工程建设具有一定的参考价值。
Taking the high liquid limit soil of Youialu Road in Nanning as the object of study, the long-term water stability of such high liquid limit soil was studied according to the actual situation of rainy areas in southern China. By changing the compaction water content, the CBR test was carried out under the conditions of not soaking, soaking for 4 days and soaking for 45 days, and then comparing with the non-reinforced soil to study the effect of the reinforcement soil on the long term under different immersion time and different compaction water content Water stability law. The results show that the strength of the reinforced soil is greatly improved compared with the unhardened soil. When the compacted water content is higher than 4% of the optimum water content, the strength is the highest under long-term immersion conditions and the water stability is the best. Soil brittleness is shown when the soil is destroyed. The lower the compaction water content is, the larger the brittleness of the soil is, and the brittleness is the least when the water content is 24%. The soil brittleness should be considered when selecting the compacted water content. The CBR value will increase with the increase of time within a certain period of time, and the long-term water stability of lime-stabilized high liquid limit soil can be guaranteed. These conclusions have some reference value for the construction of high liquid limit soil subgrade in the rainy area of the South China.