河湖清淤吹填土固结硬化及生态处治效果

发布时间：2018-06-12 03:24

  本文选题：吹填土 + 真空预压　； 参考：《水利水运工程学报》2017年02期

【摘要】：河湖清淤吹填土含水率高,流动性大,具有污染性。无砂真空排水预压法在固结硬化吹填土,提高其强度和承载力方面效果显著。受环形流道、落淤分选的影响,同一堆泥场内不同区域的地基沉降和超静孔压的变化存在一定差异性。无砂真空预压法具有较好的阻隔、过滤、吸附有机污染物等净化功能,经历堆置沉淀、负压抽吸、尾水沉淀和水生植物过滤吸附后排放的水体中有机质和总磷(TP)含量大幅减小,污染综合指数由0.8~1.0降到0.7,基本满足地表水Ⅲ类水质标准要求。固结后吹填土中的有机质、总氮、总磷含量大幅度降低,有机污染指数提高了1个等级。重金属含量符合土壤环境质量Ⅲ类标准,重金属的浸出毒性指标低,对地表水无污染,重金属污染程度的计算评价结果总体为轻微。
[Abstract]:River and lake dredging and filling have high moisture content, high fluidity and pollution. The sand-free vacuum drainage preloading method can improve the strength and bearing capacity of consolidation hardened fill. Due to the influence of annular channel and sedimentation separation, there are some differences in the variation of foundation settlement and superstatic pore pressure in different areas of the same pile of mud field. Vacuum preloading without sand has good purification functions such as blocking, filtering, adsorption of organic pollutants, etc. The contents of organic matter and total phosphorus in the discharged water body have been greatly reduced after heap precipitation, negative pressure suction, tail water precipitation and aquatic plant filtration and adsorption. The comprehensive index of pollution was reduced from 0.8 ~ 1.0 to 0.7, which basically met the requirements of water quality standards of class 鈪，

本文编号：2008083