（宁波大学岩土工程研究所， 宁波 315211）

［摘要］为了获得宁波地区典型软黏土在温度荷载作用下的邓肯张模型参数，在不同的温度和围压下，对宁波某工地现场的软黏土土样分别进行三轴固结不排水试验。通过分析软黏土的应力-应变曲线的特点，得到了相应的邓肯-张模型参数值，并归纳总结了各参数在温度荷载作用下的变化规律。试验结果表明，随着温度升高，软黏土邓肯-张模型参数中的黏聚力c、内摩擦角φ、试验参数K值呈减小的趋势，试验参数n和破坏比Rf值则呈增大趋势。试验所得的参数值可作为宁波地区岩土工程中软黏土分析计算的参考值。

［关键词］温度作用; 邓肯-张模型; 三轴试验; 软黏土

中图分类号：TU411       文献标识码：A       文章编号：1002-848X(2014)03-0093-04

Test study on parameters of Duncan-Chang model for soft clay with consideration of temperature influence

Guo Zhen, Liu Ganbin, Yin Tiefeng, Zheng Rongyue, Deng Yuebao

（Institution of Geotechnical Engineering, Ningbo University, Ningbo 315211, China）

Abstract: In order to get parameters of Duncan-Chang model for typical soft clay in Ningbo, undrained consolidation triaxial test was carried out to the soft clay from a construction site in Ningbo under different temperature and confining pressure.Through analysis on the characteristics of stress-strain curves of the soft clay, parameter values of Duncan-Chang model were got and some changing regularity about parameters under different temperature were concluded. The test results indicate that as the temperature increases, the values of cohesion c, internal friction angle φ and experimental parameter K decrease, whereas the values of experimental parameter n and break ratio Rf increase. The parameter values obtained can be used as reference value for analysis and calculation of soft clay for geotechnical engineering in Ningbo.

Keywords: temperature action; Duncan-Chang model; triaxial test; soft clay

*国家自然科学基金资助项目(51278256, 51178227)。

作者简介：郭桢，硕士研究生，Email: nbuguozhen@163com。

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