原位固化技术在城市快速路中的应用研究

Application of In-situ Solidification Technology in Urban Expressways

长江漫滩区软土分布广泛,河网密布,在道路的建设过程中不可避免地会穿越河塘.当道路穿越河塘区时,多采用清除淤泥,回填素土或灰土的填筑方案,因此将产生较多的河塘淤泥弃方,同时需要外用借方.实现河塘淤泥的就地资源化利用,成为亟待解决的问题.通过对河塘淤泥进行取样、配合比研究及现场试验段验证等手段,结合强力搅拌头对河塘淤泥进行了就地改良固化,可在改良后的淤泥顶直接进行路基填筑等进一步施工,实现了淤泥的就地资源化利用,同时减少了外弃土方、外借土方,有利于环境保护和造价节约.

The soft soil in the floodplain area of the Yangtze River is widely distributed and the river network is dense.It will inevitably cross river ponds during the road construction process. When the road crosses the river pond area,the filling scheme of removing silt and backfilling plain soil or lime soil is often adopted,so river pond silt discards will be generated,and external soil importing will be required. The in-situ resource utilization of river pond silt has become an urgent problem. This article carried out the in-situ improvement of river pond silt by means of sampling of river pond silt,mix ratio research and field test,combined with a powerful stirring head. It can be solidified,and further construction can be directly carried out on the improved silt roof. The technology can realize the in-situ resource utilization of the silt,reduce the amount of abandoned earthwork and borrowed earthwork,and is beneficial to environmental protection and cost savings.