污水环境对水泥土渗透性能影响的试验研究

doi:10.16285/j.rsm.2015.11.002

›› 2015, Vol. 36 ›› Issue (11): 3047-3054.doi: 10.16285/j.rsm.2015.11.002

污水环境对水泥土渗透性能影响的试验研究

陈四利¹，杨雨林¹，周辉²，胡大伟²

1. 沈阳工业大学建筑与土木工程学院，辽宁沈阳 110870； 2. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，湖北武汉 430071

收稿日期:2015-07-19 出版日期:2015-11-11 发布日期:2018-06-14
作者简介:陈四利，男，1959年生，博士，教授，主要从事环境岩土力学理论及其应用的研究工作。
基金资助:
国家自然科学基金资助项目（No.51279109，No.50979104，No.51479193，No.51209085）；国家重点基础研究发展计划（973）项目（No.2010CB732006）。

Effect of sewage environment on permeability of cemented soil

CHEN Si-li¹, YANG Yu-lin¹, ZHOU hui², HU Da-wei²

1. School of Architecture & Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China

Received:2015-07-19 Online:2015-11-11 Published:2018-06-14
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos.51279109, 50979104, 51479193 and 51209085) and the National Basic Research Program of China(973 Program) (Grant No.2010CB732006).

摘要/Abstract

摘要： 现多数水泥土防渗工程都间接或直接的与地下腐蚀性介质环境接触，会导致水泥土防渗性能的降低甚至失效。因此，通过室内模拟试验，设计了不同的水泥掺入比，进行了在污水和清水环境下水泥土的渗透性能试验，研究了在不同龄期下水泥土的渗透系数变化规律，并同时分析了渗透后水泥土中离子浓度的变化规律。试验结果表明，在清水环境下，随着龄期的增长，水泥土的渗透系数逐步减小，60 d后随着龄期的增加，水泥土渗透系数减小的程度越来越缓慢；在污水养护条件下，龄期在60 d之前，水泥土渗透系数逐步减小，龄期在60 d之后，由于水泥土被侵蚀，致使水泥土随着龄期的增加，水泥土的渗透系数逐步增大；无论是清水还是污水环境，随着水泥掺量的增大，其渗透系数均逐步降低；在污水环境中，随着龄期的增加，其水泥土中的Ca2+，Mg2+，Cl?，浓度均逐步增大，而清水环境中Mg2+，Cl?，浓度均逐步减小。其研究成果可为水泥土防渗工程的抗渗性和耐久性设计和应用提供技术参数，具有重要的工程意义。

关键词: 水泥土, 污水, 水泥掺量, 龄期, 渗透系数, 离子浓度

Abstract: Cemented soil in anti-seepage engineering usually directly or indirectly encounters underground corrosive media environment, which may lead to decrease or even failure in impermeability. For this purpose, the permeability tests are conducted on the cemented soil with different cement ratios under the sewage and clean water conditions, respectively. The effects of curing ages on the permeability of cemented soil are investigated, and the evolutions of ion concentration in cemented soil after permeating are also analyzed. The result shows that for the samples soaked under clean water curing condition, their permeabilities decrease gradually with increasing curing age, and this decreasing rate becomes more slowly when the curing age exceeds sixty days. For the specimens soaked under sewage curing condition, their variations of permeabilities are similar with those of specimens with the curing age less than sixty days under clean water curing condition. However, an increase in the permeability is observed when the curing age exceeds sixty days. This phenomenon is attributed to the erosion effects of sewage on cemented soil. Under both clean water and sewage curing conditions, the permeability decreases gradually with the increase of cement content. With the increasing of curing age, the concentrations of Ca2+, Mg2+, Cl? and SO42? in cemented soil gradually increase under sewage curing condition, whereas the concentrations of Mg2+, Cl?, SO42? gradually decrease under clean water curing condition. The research results can provide technical parameters for the impermeability and durability design of cemented soil in anti-seepage engineering, which have an important engineering significance.

Key words: cemented soil, sewage, cement content, curing age, permeability coefficient, ion concentration

中图分类号:

TD 823

陈四利，杨雨林，周辉，胡大伟,. 污水环境对水泥土渗透性能影响的试验研究[J]. , 2015, 36(11): 3047-3054.

CHEN Si-li , YANG Yu-lin , ZHOU hui , HU Da-wei,. Effect of sewage environment on permeability of cemented soil[J]. , 2015, 36(11): 3047-3054.

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污水环境对水泥土渗透性能影响的试验研究

Effect of sewage environment on permeability of cemented soil

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