柔壁渗透仪的试验研究.pdf

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探矿工程(岩土钻掘工程)
2008年第9期
籴壁渗透仪的试验研究
靖向党,于波,谢俊革
(长春工程学院,吉林长春130021)
摘要:针对防渗浆材结石体或灌浆固结体渗透性的测试及其对污染物阻滞性能测试的需要,研制了一种围压密
封的柔壁渗透仪,并获得国家专利。采用S、N和Z型三类浆材结石体试样,通过在不同渗透压力、不同围压条件下
的渗透系数测定,与南-55型变水头渗透仪的对比试验研究,以及垃圾渗沏液的渗滤试验,证明柔壁渗透仪对制样
要求不高、密封好、測试误差<1.19x10-cm/s,精度满足规范要求。该研究的创新点在于采用柔性乳胶膜作测试
试样的側壁,通过气压或水压施加国压实现试样的侧壁密封,渗透压力可在10~1000kPa范围调节,围压可在10~
1500kPa范围调节,试样直径有61.8和101mm两种规格可选,且精度要求不高,试样高度在20~150mm范围内
任意选用,可方便地用于测试浆材结石体或灌浆固结体的渗透系数,以及浆材结石体对污水中污染物的阻滯性能,
有助于防渗浆材的研制。
关键词:柔壁渗透仪;浆材;滲透性;阻滯性
中图分类号:TUS02文献标识码:A文章编号:1672-7428(2008)09-0028-04
T'est Research of Permeameter with Flexible wall//MG Xiang-dang, YU Bo, XIE Jun-ge (Changchun Institute of
Technology, Changchun Jilin 130021, China)
Abstract: Based on the needs of permeability test of slurry concretion body and grouting concretion body and their block
performance test to the pollutants, one kind of permeameter with flexible wall was developed which is air-proofed by all
round pressure, and got the patent in China. Permeability coefficient tests were made on S, N and Z three slurry concretion
body samples in different seepage pressure and dif erent all-round pressure, the results of permeameter with flexible wall
and NAN 5 permeameter were ompared, and landfill leachate filtration test was also conducted. These tests proved that
the permeameter with flexible wall has litle requirement for slurry concretion body samples with good airproof, the error was
less than 1. 19 x 10 "cms and the precision could be conformed to the standard. This article has selected flexible latex
film for wall around the sample and made the sample air-proofed by air pressure or water pressure. Adjusting range of seep-
age pressure was 10-1000 kpa, all-round pressure was 10-1500 kpa. The diameter of sample could be 61.8 mm or 101
mm, and the length between 20-150 mm, it was convenient to test permeability coefficient of slurry concretion body
grouting concretion body, and block performance of the body to the pollutant in sewage, and helpful to develop anti-seepage
slurry.
Key words: permeameter with flexible wall slurry; permeability; block performance
0引言
结体和GCL渗透系数的测定仪,以及垃圾填埋场防
自1802年法国工程师査理士?贝利尼在第厄渗浆材对污染物阻滯性能的测定十分必要。
普水闸修复工程中首次采用人工锤击法灌注粘土和
目前,国内常水头渗透仪主要适用于渗透系数
水硬石灰浆以来,灌浆材料和灌浆技术不断发大的无粘聚性土的渗透系数测试,变水头渗透仪
展,广泛用于水利工程防渗、土木工程地基加固、(如南-55型)适用于渗透系数较小(一般大于
环保工程中垃圾填埋场防渗处理等,而且在各种防10cm/s)的粘性土的渗透系数测试,后者的构造
渗工程中要求浆材结石体或灌浆后的固结体具有低是由上下盖、盛样筒、环刀、上下透水石组合而成,当
的渗透系数,如垃圾填埋场防渗要求材料渗透系数以一定的水头高度向渗透仪供水时,水将经下透水
>10-7cm/s,土工合成材料粘土村垫( geosynthetic石、环刀中的试样、上透水石流出,根据测管水头变
clay liner,简称GCL)防渗材料滲透系数一般为1×化和时间等,依据达西定律求得渗透系数。但是,该
(10-10~10-7)。因此研究开发浆材结石体、灌浆固渗透仪用于测试浆材结石体渗透性时存在如下问
收稿日期:2008-05-04
基金项目:建设部计划项目(編号2007ーK8-14
作者简介:靖向党(1957-),男(汉族),内蒙古包头人,长春工程学院教授,探矿工程专业,从事钻孔工艺、注浆浆材和钻孔冲洗液的教学与
研究工作,吉林省长春市同志街3066号,jrd57@126.c0m。