工程实例的试验成果表明:素填土在自然状态下将产生固结,但这种固结除了受自身重力作用外,还受到雨水下渗、阳光照晒和风力风干等因素的影响,且上部主要受雨水下渗、阳光照晒和风力风干的影响,下部则主要受自身重力的作用.因此素填土的这种固结不是单纯的自重固结,我们称之为自然固结.试验结果还表明:经过一定时间后,在雨水下渗和阳光照晒和风力风干的作用下,上部一定深度内的素填土固结度较好,且形成“硬壳层”,填筑时间四年的素填土在6m深度内,其力学性能相当或接近于夯击能为2160kN·m的夯填土,因此可以作为对沉降敏感性要求不高的轻型低型建筑物和道路、小荷载的持力层,这既可节省工程造价,且也是安全的.%Engineering test results showed that: plain fill under the natural state will produce the consolidation, but affected by their own gravity and also by rainwater infiltration, exposure to sun and wind drying and other factors. The upper part is mainly influenced by rainfall infiltration,exposure to sun and wind drying effect, while the lower part mainly affected by gravity. So the fill of this consolidation is not simply the self-weight consolidation, we refer to as the natural consolidation. The results also show thato.after a certain period of time,in rainwater infiltration,exposure to sun and wind dried under the action of a certain depth, the upper part of the fill consolidation degree is better,and the formation of"crust", the filling time of four years the fill in the depth of 6 meters,its mechanical properties equivalent or close to compaction energy for 2160kN o m tamping and filling, so it can be used for settlement sensitivity requirements of light low buildings and roads. For the bearing stratum of pile load,it lower project cost,and is safe.
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