苍南县舟巴艚中心渔港疏浚泥沙落淤试验研究

Experimental Study on Settlement of Dredging Sediment in Pacao Fishing Port of Cangnan County

利用沉降柱试验研究了疏浚泥沙的自然沉降规律。研究发现,泥浆的沉降过程可区分为自然沉降阶段和自重固结阶段,自然沉降阶段是一个加速沉降过程,自重固结阶段是一个减速沉降过程;同时,研究发现水中含盐量对落淤有一定的影响,含盐量在3.2%时孔隙比最大,即淤泥的沉落速度较慢,土样含水率最高。

This paper studies the natural settlement rule with settlement column experiment. The results indicate that mud settlement falls into two categories, natural settlement and self- weight consolidation. The former is an accelerated settlement process, while the latter is a decelerated settlement process. In addition, salt content in water would have a certain impact on sediment settlement. When salt content was at 3.2%, void ratio reached its maximum, i.e. the settlement of dredging sediment was relatively slow with the highest moisture content in soil samples.