不同固结路径温州黏土固有不排水强度性状试验研究

发布时间：2018-04-05 03:30

本文选题：温州黏土　切入点：固结路径　出处：《岩土工程学报》2014年09期

【摘要】：为研究初始条件和应力状态对重塑黏土固有不排水强度性状的影响,采用应力路径三轴仪对室内制备的温州黏土进行一系列不同固结路径下的三轴固结不排水剪切试验。通过室内试验研究探讨温州黏土不同固结路径下不同平均有效应力固结后三轴不排水剪切应力应变关系和不排水强度特性;引入不同平均有效应力p'下的孔隙指数Iv与不排水强度比R*su=Su/p',分析不同固结路径下不排水强度Su的变化规律,并与Chandler提出的固有强度线ISuL进行比较分析。结果表明:相同平均有效应力p'下,不同固结路径下不排水剪切强度Su和不排水强度比R*su=Su/p'随固结路径的变化而变化;当不排水强度比Su/p'=0.33时,孔隙指数Iv与固结不排水强度Su之间的关系与Chandler的固有强度线ISuL一致。
[Abstract]:In order to study the effect of initial conditions and stress state on the inherent undrained strength of remolded clay, a series of undrained shear tests were carried out on Wenzhou clay prepared in laboratory by means of stress path triaxial apparatus.The relationship between undrained shear stress-strain and undrained strength of Wenzhou clay under different average effective stress under different consolidation paths was studied by laboratory test.The variation law of undrained strength Su under different consolidation paths is analyzed by introducing the porosity index I _ v and the ratio of undrained strength to undrained strength under different mean effective stress (p'), and compared with the intrinsic strength line (ISuL) proposed by Chandler.The results show that under the same mean effective stress p', the undrained shear strength Su and the undrained strength ratio Ru Su-Su / p' vary with the consolidation path under different consolidation paths, and the undrained shear strength ratio is 0.33 when the undrained strength ratio is Su / p0 = 0.33.The relationship between porosity index v and consolidation undrained strength Su is consistent with the intrinsic strength line ISuL of Chandler.
【作者单位】：东南大学岩土工程研究所;福州大学土木工程学院;
【基金】：国家自然科学基金项目(41372309,41172240)
【分类号】：TU411

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