重塑马兰黄土渗透性试验研究.pdf

Journal of' Engineering Geology工程地质学报1004-9665/2016/24(2)-0276-08
D)O1:10.13544/j.cnki.jeg.2016.02.014
重塑马兰黄士渗逶性试验硏究
洪勃李喜安02陈广东骆建文李林翠の
(①长安大学地质与测绘工程学院西安710054)
(②国土资源部岩土工程开放研究实验室西安710054)
(3河南省地质环境监测院郑州450016
(④西安长庆科技工采有限责任公司西交710021)
摘要为了研究干密度和初始含水率对重塑黄上渗透性的影啊,对延安新区1期工程所取的重戦马必黄土进行了饱和渗透
试验。结果表明:在非饱和状态,干密度对饱和时间的影响最为显著,饱和时问随十密度的増大而増大,而初始含水率对饱和
时间的影啊不明显。重塑马と黄上的渗透系数随着干密度的增大而减小,关系可以拟合为幂函数关系。在一定干密度范
用内,渗透系数随初始含水率的増大而减小,其关系可以用直线关系拟合。渗透系数与孔隙比之间可以用幂数关系拟合,
渗透系数随孔隙比的城小而减小。初始含水率、干密度以及孔隙比都是影响重塑黄土渗透性的重要因素,主要是通过对试
样微结构的影响影响渗透系数。该研究对延安新区的工程建设具有一定的理论指导利实际应用价俏。
关键词马兰黄上渗透系数干密度含水率试验
中图分类号:P642.1311文献标识码:A
EXPERIMIENTAL STUDY OF PERMIEABILMY OF REMOLDED MALAN
ILOESS
HONG Bo"II Xian"CHEN Guangdong"LUO Jianwen"II Iincui
(Ischool of Geological Engineering and Geomaties, Chang'an University, Xi'an 710054)
(2 Open Research Laboratory of Geotechnical Engineering, Ministry of land and Resources, Xi'an 710054
Henan Institute of Geological Enzironment Monitoring, Zhengzhou 450016
(acompany limited of Chang-ging Science and Technology, Xi'an 710021)
Abstract This paper examines the influence of dry density and initial moisture content to the remolded loess
permeability. It carries out the permeability Lest of Malan remolded loess in I phase project of Yan'an New District
The results show thal under non-saluralion conditions, the time that samples lake to get saturated gelting longer with
the increase of dry density. So the dry density influence on penetration time is most significant, but the initi
moisture content is not obvious. Remolded Malan loess permeability coefficient decreases with the increase of initial
water content and dry density and gradually tends to stabilize. The relationship between them can be fitted to a
power function. Within a certain scope around dry density, the permeability coefficient decreases with the initial
水收稿凵期:2015-07-24;收到修改稿凵期:2015-11-05
基金项目:国家自然科学基金项目(No.41172255,41572264,414404),中央高校某本科研业务费项目(2014(2260008),西安长庆科技
工程有限责任公司资助项月(CT"HC(2014).-KY-(01.3)资
第一作者简介:洪勃(1987ー),男,硕土生,主要研究方向黄土工程地质及地质灾害防治.Fmail:hongbo6llkc163.com
通讯作者简介:李交(1968-),,教授,博十生导师,主要从事黄十地质灾害方面的教学与科研工作.Email:delia@chd.cdu.cn