北海港铁山港区疏浚膨胀土的处治和利用

Disposal and utilization of dredged expansive soil in Tieshan Port area of Beihai Port

铁山港区7^(#)~10^(#)泊位建设中产生大量以白泥为主的疏浚物。利用白泥作为回填料可以节省弃土处理费用和后方陆域回填费用。但白泥具有膨胀土特性,使用不当会对工程质量造成不利影响。本文根据室内试验和典型施工的结果,对白泥的回填高程及改良方法、改良土的填筑性能和强夯适用性等提出建议,对铁山港区合理使用白泥作为回填料以及后续的加固处理具有一定指导意义。

A large amount of dredging material mainly composed of white clay is dredged during the construction of berths 7^(#)-10^(#)in Tieshan Port area.Using white clay as backfill material can save on disposal costs and backfilling costs.However,white clay has the characteristics of expansive soil,and improper use can have adverse effects on the engineering quality.Base on the results of laboratory test and typical construction,this paper proposes suggestions for the backfill elevation and improvement methods for white clay,the filling performance of improved soil,and applicability of dynamic compaction.It has a guiding implications for the fair dealing of white clay as backfill material and foundation reinforcement treatment in Tieshan Port area.