滨海港口吹填淤泥排水固结技术研究  

Research on Drainage and Consolidation Technology of Sludge Filling in Binhai Port

作　　者：傅英坤 FU Yingkun(Shandong Port Group Yantai Port Group Co.,Ltd.,Yantai 264000,China)

机构地区：[1]山东港口烟台港集团有限公司,山东烟台264000

出　　处：《粉煤灰综合利用》2023年第2期57-61,共5页Fly Ash Comprehensive Utilization

摘　　要：为探讨采用混凝土弃渣改善滨海港口淤泥真空预压固结的效果,本次研究对原样淤泥及5种不同混凝土弃渣掺量下的改性淤泥展开了真空预压排水固结试验,并通过排水量、含水率、十字板剪切强度评价其固结效果。得出主要结论如下:(1)不同混凝土弃渣掺量下淤泥的排水量变化规律基本一致:模型桶淤泥在抽真空0~50 h内迅速排水,随后排水速率逐渐降低,排水量到第250 h时基本稳定,达到总排水量的95%以上;(2)随着混凝土弃渣掺量的增加,淤泥的排水量逐渐增加,排水量的增幅逐渐降低;淤泥含水率逐渐降低,含水率的降幅逐渐减小;淤泥十字板剪切强度逐渐增强,强度的增幅逐渐减小;且当混凝土弃渣的掺量较低时,对淤泥排水量、含水率及强度的改善效果不明显;(3)不同混凝土弃渣掺量下,淤泥的含水率、十字板剪切强度随着桶深的变化规律基本一致:桶深越大,含水率越高、剪切强度越低。In order to explore the effect of using concrete spoils to improve the vacuum precompression consolidation of coastal port silt,this study carried out vacuum precompression drainage consolidation experiments on the original sludge and modified sludges with five different concrete spoilage contents.and the consolidation effect was evaluated by drainage,moisture content and cross plate shear strength.The main conclusions are as follows:(1)the variation law of the silt drainage under different concrete waste slag contents is basically the same:the silt in the model bucket drains rapidly within 0~50 h of vacuuming,and then the drainage rate gradually decreases,and the drainage is basically stable at the 250 th hour,reaching more than 95%of the total drainage;(2)with the increase of the concrete waste slag content,the drainage of the silt gradually increases,and the increase of the drainage gradually decreases;the shear strength of the slab increases gradually,and the increase of the strength gradually decreases;and when the content of concrete waste slag is low,the improvement effect on the sludge drainage,water content and strength is not obvious;(3)under different concrete waste slag content,the water content of the silt and the shear strength of the cross plate with the barrel depth are basically the same:the greater the barrel depth,the higher the water content and the lower the shear strength.

关 键 词：港口淤泥 真空预压法 排水固结 建筑垃圾 

分 类 号：TU723.3[建筑科学—建筑技术科学]