强夯法控制高填方变形的离心模型试验

文章通过四个模型的离心模拟试验,对某机场强夯加固后的高填方地基土的变形沉降问题进行了模拟研究,并结合现场试验对该机场高填方地基强夯处理效果进行了综合评价。试验结果表明,由于填方土高度过大,未经强夯法处理的高填方地基的最终沉降量满足不了工程设计要求;而经过强夯处理的地基,填方土体瞬时沉降和固结沉降在施工后都能迅速完成,变形和沉降可得到控制,这说明强夯法可用于控制丘陵山区高填方地基的不均匀沉降。

Centrifuge model test for high embankment deformation control using dynamic compaction technique

Based on the similar theory of model test,a group of centrifuge model tests are carried out to investigate the deformation and settlement of high embankment of an airport treated with dynamic compaction technique.The effect of dynamic compaction combined with site test is evaluated.The research result shows that the high embankment without being treated with dynamic compaction can't satisfy the needs of engineering design owing to the oversize height of fill soil,whereas the fill soil with dynamic compaction can accomplish the settlement fast after construction,including instant settlement and consolidation settlement,and the deformation and settlement are controlled.It is proved that the dynamic compaction technique is fit for reinforcing treatment of high embankment in mountainous areas,and can control the uneven settlement of high embankment.