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通过分析碾压机械压实过程中产生的附加应力,确定了分层碾压土体所具有的前期固结应力;通过土水特征曲线试验和渗透试验,按照渗透系数折减的方法确定了非饱和土的固结系数,按照饱和土的一维固结理论近似计算了非饱和土的固结过程;按照自重应力大于前期固结应力的原则计算填土路堤的再压缩沉降,结合固结计算的结果估计了高填土路堤的后期沉降,提出了不同填土高度、使用不同碾压机械的高填方路堤的预抛高。
By analyzing the additional stress generated in compaction process of roller compaction, the pre-consolidation stress of layered roller compacted soil was determined. According to the soil-water characteristic curve test and infiltration test, The consolidation coefficient of saturated soil is calculated and the consolidation process of unsaturated soil is approximated according to the one-dimensional consolidation theory of saturated soil. The compressive settlement of embankment is calculated according to the principle that the self-weight stress is greater than the pre-consolidation stress. The results estimated the late settlement of high fill embankment, proposed different fill height, using different high-filling embankment rolling pre-cast high.