|本期目录/Table of Contents|

[1]王雅平,王旭东,罗东娜.含水层砂土压缩变形特性及数学描述[J].南京工业大学学报(自然科学版),2019,41(04):480-484.[doi:10.3969/j.issn.1671-7627.2019.04.013]
 WANG Yaping,WANG Xudong,LUO Dongna.Compression deformation characteristics of sand in aquifer and its mathematical description[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2019,41(04):480-484.[doi:10.3969/j.issn.1671-7627.2019.04.013]
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含水层砂土压缩变形特性及数学描述()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
41
期数:
2019年04期
页码:
480-484
栏目:
出版日期:
2019-07-24

文章信息/Info

Title:
Compression deformation characteristics of sand in aquifer and its mathematical description
文章编号:
1671-7627(2019)04-0480-005
作者:
王雅平1王旭东1罗东娜2
1. 南京工业大学 岩土工程研究所,江苏 南京 210009; 2. 宁夏建设职业技术学院,宁夏 银川 750011
Author(s):
WANG Yaping1WANG Xudong1LUO Dongna2
1. Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing 210009, China; 2. Ningxia Construction Vocational and Technical College, Yinchuan 750011, China
关键词:
承压含水层 砂土 抽水模式 压缩变形
Keywords:
confined aquifer sand water pumping modes compression deformation
分类号:
P641
DOI:
10.3969/j.issn.1671-7627.2019.04.013
文献标志码:
A
摘要:
基于FlowTracⅡ增量固结试验系统,通过控制孔隙水压力设计模拟符合承压含水层砂土应力状态和满足抽水条件应力路径的压缩试验,得到了砂土应变与时间关系曲线,探讨分析不同抽水模式作用对含水层砂土压缩变形特性的影响。试验结果表明:在抽水作用下,砂土压缩变形具有非线性和时效性特征; 在相同前期固结压力下,砂土压缩变形量随着抽水强度的增加而增大,且变形稳定所需时间也越长; 在稳压抽水作用下,砂土的应变率与时间在双对数坐标中呈现较明显的线性关系,其斜率受抽水强度和抽水速率的影响。建立了考虑抽水强度和抽水速率影响的砂土压缩变形与时间、应力的归一化经验公式。研究成果揭示了不同抽水模式下含水层砂土的压缩变形特性,为合理评价抽水引起的地面沉降提供试验依据。
Abstract:
Based on the FlowTrac II incremental consolidation system, compression tests by the control of pore pressure were designed to meet the stress state and the stress path of the sand in the confined aquifer. The relationship between strain-time and the sand was obtained. The effects of different water pumping modes on the compression deformation characteristics of the sand in aquifer were discussed. Results showed that the compression deformation of the sand under water pumping was nonlinear and time-dependent. Under the same pre-consolidation pressure, the compression deformation of the sand increased with the increase of water pumping intensity, and the time for the sand to stabilize was longer. Under the stable water pumping modes, the relationship of strain rate-time showed linear in the double logarithmic coordinate and the slop was affected by the water pumping intensity and rate. Considering the water pumping intensity and rate, a normalized empirical formula of compression deformation, time and stress was established. The results revealed the compression deformation characteristics of the sand under different water pumping modes and provided experimental basis for the reasonable evaluation of land subsidence caused by extracting groundwater.

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备注/Memo

备注/Memo:
收稿日期:2018-03-28
基金项目:国家自然科学基金(41272303); 江苏省“六大人才高峰”高层次项目(09-F-004)
作者简介:王雅平(1990—),女,E-mail:kancha0902wyp@163.com; 王旭东(联系人),教授,E-mail:cewxd@njtech.edu.cn.
引用本文:王雅平,王旭东,罗东娜.含水层砂土压缩变形特性及数学描述[J].南京工业大学学报(自然科学版),2019,41(4):480-484..
更新日期/Last Update: 2019-07-20