- 摘 要
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（寧波大學(xué)巖土工程研究所， 寧波 315211）
［摘要］為了獲得寧波地區(qū)典型軟黏土在溫度荷載作用下的鄧肯張模型參數(shù)，在不同的溫度和圍壓下，對寧波某工地現(xiàn)場的軟黏土土樣分別進(jìn)行三軸固結(jié)不排水試驗(yàn)。通過分析軟黏土的應(yīng)力-應(yīng)變曲線的特點(diǎn)，得到了相應(yīng)的鄧肯-張模型參數(shù)值，并歸納總結(jié)了各參數(shù)在溫度荷載作用下的變化規(guī)律。試驗(yàn)結(jié)果表明，隨著溫度升高，軟黏土鄧肯-張模型參數(shù)中的黏聚力c、內(nèi)摩擦角φ、試驗(yàn)參數(shù)K值呈減小的趨勢，試驗(yàn)參數(shù)n和破壞比Rf值則呈增大趨勢。試驗(yàn)所得的參數(shù)值可作為寧波地區(qū)巖土工程中軟黏土分析計算的參考值。
［關(guān)鍵詞］溫度作用; 鄧肯-張模型; 三軸試驗(yàn); 軟黏土
中圖分類號：TU411 文獻(xiàn)標(biāo)識碼：A 文章編號：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
*國家自然科學(xué)基金資助項目(51278256, 51178227)。
作者簡介：郭楨，碩士研究生，Email: nbuguozhen@163com。
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