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粗颗粒土渗透系数及土体渗透变形仪的研制
引用本文:张福海,王保田,张文慧,张海霞. 粗颗粒土渗透系数及土体渗透变形仪的研制[J]. 水利水电科技进展, 2006, 26(4): 31-33
作者姓名:张福海  王保田  张文慧  张海霞
作者单位:河海大学岩土工程研究所,江苏,南京,210098;河海大学岩土工程研究所,江苏,南京,210098;河海大学岩土工程研究所,江苏,南京,210098;河海大学岩土工程研究所,江苏,南京,210098
基金项目:河海大学科技创新基金资助项目(2003403043)
摘    要:针对目前还没有合适的室内试验仪器测试巨粒混合土的渗透系数和巨粒混合土发生渗透破坏时的临界水力梯度的现状,研制了粗颗粒土渗透系数及土体渗透变形测试仪。该仪器最大的特点是根据巨粒混合土中含有细粒土致使土体难以饱和的特点,在仪器上设置了密封抽气饱和装置,可以对土样进行抽气饱和。结合工程实践对不同级配的土体进行了渗透及渗透变形试验,试验测得的土体渗透系数和临界水力梯度与理论计算的结果非常接近,部分试验成果已应用于工程实践。

关 键 词:土石坝  巨粒土  渗透系数  渗透变形  测量仪器
文章编号:1006-7647(2006)04-0031-03
修稿时间:2005-04-15

Development of apparatus for measuring permeability coefficient and seepage deformation of coarse-grained soil
ZHANG Fu-hai,WANG Bao-tian,ZHANG Wen-hui,ZHANG Hai-xia. Development of apparatus for measuring permeability coefficient and seepage deformation of coarse-grained soil[J]. Advances in Science and Technology of Water Resources, 2006, 26(4): 31-33
Authors:ZHANG Fu-hai  WANG Bao-tian  ZHANG Wen-hui  ZHANG Hai-xia
Abstract:A new apparatus was developed for effectively measuring the permeability coefficient and critical hydraulic gradient under seepage failure of the coarse-grained soil in laboratory tests.In consideration of the factor that the fine-grained soil included in the coarse-grained soil makes it difficult for the soil to be saturated,sealed evacuating equipment was installed,so that the soil samples can reach the saturated state by air extracting.Seepage and seepage deformation tests on soils with different gradations were performed for some practical projects,and the measured data of the permeability coefficient and critical hydraulic gradient of the soil were quite close to the calculated results.Some results from experimental study have been applied to practical projects.
Keywords:earth rock dam  coarse-grained soil  permeability coefficient  seepage deformation  measurement apparatus
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