|本期目录/Table of Contents|

[1]刘瑾,亓孝辉,张达,等.聚氨酯型固化剂改良表层砂土抗渗透特性试验[J].地球科学与环境学报,2017,39(01):126-134.
　LIU Jin,QI Xiao-hui,ZHANG Da,et al.Experiment on Penetration Resistance of Surface Sandy Soil Stabilized by Polyurethane Soil Stabilizers[J].Journal of Earth Sciences and Environment,2017,39(01):126-134.
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第39卷
期数:
2017年第01期
页码:
126-134
栏目:
工程地质
出版日期:
2017-01-15

文章信息/Info

Title:
Experiment on Penetration Resistance of Surface Sandy Soil Stabilized by Polyurethane Soil Stabilizers
文章编号:
1672-6561(2017)01-0126-09
作者:
刘瑾; 亓孝辉; 张达; 汪勇; 冯巧; 王芊; 肖敏慧
河海大学 地球科学与工程学院，江苏 南京 211100
Author(s):
LIU Jin;  QI Xiao-hui;  ZHANG Da;  WANG Yong;  FENG Qiao;  WANG Qian;  XIAO Min-hui
School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, Jiangsu, China
关键词:
地质工程; 砂土; 高分子固化剂; 渗透试验; 成膜试验; 抗渗机理; 固化层
Keywords:
geological engineering;  sandy soil;  polymeric stabilizer;  penetration test;  membrane forming test;  impermeability mechanism;  curing layer
分类号:
P642
DOI:
-
文献标志码:
A
摘要:
针对聚氨酯型固化剂(简称“OH固化剂”)改良表层砂土抗渗透特性，采用TST-70型常水头渗透仪和自制多孔渗透仪，将OH固化剂喷洒在砂土表层，在不同含量OH固化剂和不同养护时间条件下，对相同厚度砂土层和不同厚度砂土层的出水时间、出水量和渗透性进行室内试验，并对其抗渗机理进行探讨。结果表明：喷洒不同含量OH固化剂后，在土体表层形成不同厚度的固化层，从而增强砂土抗渗透性能；在相同养护时间下，随着OH固化剂含量的增加，固化层厚度变大，出水时间变长，出水量减少；在相同OH固化剂含量下，随着养护时间变长，出水时间变长，出水量减少；在砂土表层加OH固化剂，不影响土体整体的渗透性，对植物的正常生长不产生影响；出水量随土层深度的降低而减少；含量为7%和9%的OH固化剂在养护6.0 h以后出现不出水现象，达到很好的防渗效果。
Abstract:
In order to find the penetration resistance of surface sandy soils stabilized by polyurethane soil stabilizers, based on TST-70 constant head permeameter and self-made multi-hole permeameter, the stabilizers with different contents were sprayed on the surface sandy soils with different curing time, and the effluent time, effluent yield and permeability were measured under the conditions of sandy soils with the same or different thicknesses. And the mechanism of penetration resistance of the stabilizer was discussed. The results show that after spraying the stabilizers with different contents, the curing layers with different thicknesses are formed on the surface, and the penetration resistance increases; because the contents of the stabilizers increase, the curing layers are thickened, and the effluent time is longer, and the effluent yields reduce under the condition of the same curing time; because the curing time increases, the effluent time is longer, and the effluent yields reduce under the condition of the same contents of the stabilizers; the addition of the stabilizers on the surface sandy soils has no influence on the permeability of soil and the growth of plant; the effluent yields reduce with the decrease of soil depth; the soil, which is stabilized by 7% and 9% contents of the stabilizers, has a good property of anti-seepage after the curing time of 6.0 h.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-07-27
基金项目:国家自然科学基金项目(41472241,41202208);江苏省自然科学基金项目(BK20141415)
作者简介:刘 瑾(1983-),女,福建漳州人,教授,工学博士,E-mail:jinliu920@163.com。
更新日期/Last Update: 2017-01-20