路基沉降规律试验研究

为了降低路面沉降病害的影响,以铁新高速公路为依托,在高填方路段进行路基沉降试验,研究其路基沉降规律。试验结果表明:初始沉降、固结沉降和次固结沉降构成了路基的总沉降;路基的初始沉降主要表现为新填土沉降;在施工期间,固结沉降完成80%左右;竣工1年后,沉降大部分为次压缩沉降,其值虽然小,却直接影响路基、路面的稳定。

Experimental Research on Rule of Subgrade Settlement

Aiming at reducing the impact of settlement disease on pavement,a set of tests are carried out to find out the rules of subgrade settlement in a deeply filled section based on Tiexin Expressway.Finally some conclusions are drawn based upon experimental results:subgrade settlements includes initial settlement, consolidation settle- ment and the second consolidation settlement;the initial settlement takes place immediately on each paving' s com- paction;the consolidation settlement completes over 80% during construction;one year after completion,the main settlement is second compression settlement in small numerical value and slow speed, which directly affects the stability of subgrade and pavement.