摘要
武汉市汉南区长江干堤整治前 ,存在着不同程度的渗漏问题 ,在此堤段实施堤后吹填工程处理是一种有效的整治措施。汉南区长江堤后吹填整治后 ,对工程实地钻取样进行实验和计算分析 ,证实了吹填措施是可行的。吹填工程设计过程中应注意以下几个问题 :①渗透变形的判别 ,以便采用合理的防渗、排渗措施 ;②吹填堤段堤基透水层特性 ;③吹填盖重效果分析。经分析得出 ,在武汉长江两岸冲积层地区 ,天然覆盖厚度在 5m以上 ,透水层厚度不大于 30m ,透水介质为粉砂或细砂 ,则在堤内人工盖重厚度 3m ,宽度 2 5 0m ,是可以满足195
Before regulation,various seepage problems existed in Yangtze main dyke in Hannan adiministrative region of Wuhan city.Jetting-filling treatment on the back side of dyke is an effective regulation measure.The test and computation-analysis on the bore hole specimen taken in field after the completion of jetting-filling works demonstrate that this measure is feasible.In the design stage,attention should be paid to the following issues:① identifying seepage deformation for taking reasonable seepage prevention and drainage measures;② pervious characteristics of dyke foundation to be jetting filled;③ the effect analysis of the jetting filled coverage weight.The analysis results demonstrate that in the alluvial area of both Yangtze banks at Wuhan,the thickness of natural impervious overburden layer is above 5 m while the thickness of pervious stratum is less than 30 m, pervious mediums are composed of powder sand or fine sand,in the light of these conditions,3 m thickness and 250 m width of artificial coverage weight inside the banks can meet the seepage control requirement under the similar water level as 1954 flood.
出处
《人民长江》
北大核心
2001年第12期6-8,共3页
Yangtze River
