Determination Permeability Coefficient from Piezocone

Determination Permeability Coefficient from Piezocone
复制标题

通过压电锥测定渗透系数

DOI:
10.1155/2014/396428
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发表时间:
2014-04
影响因子:
--
通讯作者:
王强
王强
中科院分区:
材料科学4区
文献类型:
--
作者:
王强

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土体剖面渗透系数是工程技术人员关心的问题之一,渗透系数的确定方法主要依靠室内渗透试验和现场抽水试验,但这些试验费时费力,尤其是局部排水条件下土体的渗透系数难以确定。通过使用无量纲归一化锥尖阻力、摩擦系数和孔隙压力比来定义量纲渗透率,这些参数使得-、-、-的曲线能够被绘制成轮廓,从而用于渗透系数。将该关系应用于南京长江第四大桥,并与室内贯入试验进行了对比。结果表明,该方法能够准确确定局部排水条件下土体的渗透系数,为工程应用提供了理论依据。
The permeability coefficient of soil profile is one of the problems concerned by engineers, and the determination of permeability coefficient method mainly relies on the laboratory permeability test and field pumping test, but these tests are time-consuming and inefficient, and especially the permeability coefficient of soil under the condition of partial drainage was difficult to determine; in this paper, the modern digital CPTU technology was used. Dimensional permeability was defined by using the dimensionless normalized cone tip resistance , friction factor , and pore pressure ratio , these parameters enable plots of -, -, - to be contoured and hence for permeability coefficient. The relationship has been applied to Nanjing 4th Yangtze river bridge, and compared with laboratory penetration test. The results indicate that the method can accurately determine the permeability coefficient of soil under partial drainage condition and provide the theoretical basis for engineering application.
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发表时间: 1950
期刊: --
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