- 摘 要
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(寧波大學巖土工程研究所, 寧波 315211)
［摘要］為了解寧波地區(qū)典型軟黏土在溫度作用下的固結特性，對其進行了不同溫度和圍壓下的熱固結試驗，并進行了理論分析。結果表明：理論分析和試驗結果相互驗證；對軟黏土而言，溫度主要通過影響土中水的粘滯系數(shù)來提高土體的滲透系數(shù)，進而加速土體的固結過程；溫度越高，土體的固結越快，土體的固結度也越高；溫差越大，固結度差值越大；不同溫度下的固結度差值隨時間的增大呈現(xiàn)出先快速增大至極值，然后再逐漸減小至零的現(xiàn)象。因此，溫度效應主要體現(xiàn)在排水固結過程的前小半段時間內(nèi)，而且溫差越大，影響效果越明顯。
［關鍵詞］軟黏土; 熱固結特性; 固結度; 溫度效應
中圖分類號：TU47 文獻標識碼：A 文章編號：1002-848X(2014)08-0066-04
Theoretical and experimental study on thermal consolidation characteristics of typical soft clay in Ningbo region
Yin Tiefeng, Liu Ganbin, Guo Zhen
(Institute of Geotechnical Engineering, Ningbo University, Ningbo 315211, China)
Abstract: In order to study the thermal consolidation characteristics of the typical soft clay in Ningbo region, thermal consolidation test under different temperatures and confining pressures were conducted. Combined with the theoretical analysis, the results show that theoretical results and test results verify each other. For soft clay, temperature increases the penetration rate of the soil by influence the viscous coefficient of the water to accelerate the consolidation process. The higher the temperature is, the faster consolidation of the soil is, and the consolidation degree of the soil is higher. The larger the temperature difference is, the larger the difference of the consolidation degree is. The difference of the consolidation degree under different temperature rapidly increases to the extreme values at first and gradually reduces to zero with the increment of time. Therefore, the effect of temperature is mainly reflected in the first half period of the drainage consolidation process, and the larger the temperature difference is, the more obvious the effect is.
Keywords: soft clay; thermal consolidation characteristic; consolidation degree; temperature effect
*國家自然科學基金資助項目(51278256, 51178227),寧波大學研究生科研創(chuàng)新基金資助項目,寧波大學優(yōu)秀學位論文培育基金資助項目。
作者簡介：尹鐵鋒，碩士，Email: 397749460@qq.com。
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