摘要
针对现有渗透变形仪存在的密封止水效果差、试样固定装置影响过流面积、仪器复杂等缺陷,通过对岩土渗透变形特性及测试原理进行分析,研制出一种适用于黏性土、水泥土类的新型渗透变形仪,该仪器设计方法独特,在试样外套橡皮膜并加围压的柔性密封止水,以及在试样顶部采用圆环型透水石固定试样等方法,既能测定岩土体的渗透系数又能测定渗透变形特性,同时,既保证试样的渗流面积不受影响又允许试样产生渗透变形,而且在渗透水压力作用下试样周围的密封性良好。实际工程应用结果表明,该仪器测定的岩土体的渗透系数及抗渗比降具有很高的可靠性和精度。
In view of the defects of the existing apparatus for measuring seepage deformation such as poor seal, seepage areas decreased by sample fix installation, complication of apparatus, etc, a new type of apparatus that can be used to measure the seepage characteristic of cohesive soil and cement soil is developed based on the analysis of the characteristic and testing theory of seepage deformation of soil. The apparatus has some unique designs such as adopting flexible seal method in which the samples are wrap by rubber membrane with confining pressure, and a ring porous stone is used on the top of the specimen to fix it, etc.. The apparatus can be used to measure seepage coefficient and deformation, and it can guarantee the effective seepage area of specimen in test and permit the test specimen to produce seepage deformation at the same time, and the seal quality of apparatus is good under the seepage hydraulic pressure in the test. The practical application indicates that the seepage coefficient and deformation and the ratio of resistance seepage slope of soil obtained by the proposed apparatus have high reliability and precision.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2008年第A02期3441-3444,共4页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩土工程
渗透系数
渗透变形
抗渗比降
仪器研制
geotechnical engineering
permeability coefficient
seepage deformation
ratio of resistance seepage slope
apparatus development
