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浙江大学学报(工学版)
土木工程     
基于GDS渗透仪的渗透试验及经验模型
邹圣锋, 李金柱, 王忠瑾, 兰璐, 王文军, 谢新宇
1. 浙江大学 滨海和城市岩土工程研究中心,浙江 杭州 310058; 
2. 浙江大学 宁波理工学院, 浙江 宁波 315100; 
3. 浙江大学 软弱土与环境土工教育部重点实验室,浙江 杭州 310058
Seepage test and empirical models for soils based on GDS apparatus
ZOU Sheng-feng, LI Jin-zhu, WANG Zhong-jin, LAN Lu, WANG Wen-jun, XIE Xin-yu
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2. Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
3. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China
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摘要:

为测定不同水头压力下的土体渗透系数变化规律,采用GDS渗透仪对宁波滨海地区软黏土进行8组渗透试验,得到4种非线性渗透模型的拟合结果,发现宁波软土渗透系数随孔隙比的减小而减小,重塑试样减小更明显,原状样与重塑样呈现近似的渗透规律,在变化幅度上有所差异,4种经典渗透模型均适用于试验结果.提出新的非线性渗透模型,收集不同文献中10组土样的渗透试验数据,验证该模型的合理性、适用性,并与已有模型适用范围进行对比,结果表明新模型具有良好的适用性,优于已有模型.

Abstract:
In order to reveal the seepage characteristics of Ningbo marine soft clay under various hydraulic gradient, confining pressure and void ratio,eight series of constant head seepage tests were performed on both undisturbed and remolded soil samples utilizing the GDS apparatus.Fitting study of the widely used seepage models in academic field was conducted by the test results. It is shown that seepage coefficients of test samples decrease nonlinearly with decreasing void ratio, which behave more obviously on remolded soil samples.Similar seepage behaviors were obtained from both remolded and undisturbed soils as well, and the test results agreed well with fitting lines of the four existing seepage models. A new nonlinear empirical model was proposed, and test data of ten kinds of soils were collected to investigate its rationality and applicability. The comparison research on fitting results shows that the new model is better used than four existing seepage models, and the application of this new model turns to worth further research.
出版日期: 2017-05-01
CLC:  TU 470  
基金资助:

国家自然科学基金资助项目(51378469).

通讯作者: 李金柱,男,讲师. ORCID:0000-0002-8835-8837.     E-mail: jinzhu_lee@163.com
作者简介: 邹圣锋(1991—),男,博士生,从事软黏土力学与地基处理等研究. ORCID:0000-0001-5100-4376. E-mail: zoushengfeng123@gmail.com
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引用本文:

邹圣锋, 李金柱, 王忠瑾, 兰璐, 王文军, 谢新宇. 基于GDS渗透仪的渗透试验及经验模型[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2017.05.003.

ZOU Sheng-feng, LI Jin-zhu, WANG Zhong-jin, LAN Lu, WANG Wen-jun, XIE Xin-yu. Seepage test and empirical models for soils based on GDS apparatus. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2017.05.003.

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