本文選題：流變性 + 流變物質(zhì)��； 參考：《巖土力學》2016年S2期

【摘要】：流變性是軟土的一種長期變形特性,對軟土地基的沉降產(chǎn)生重要影響�，F(xiàn)有研究表明,軟土中高黏性的流變物質(zhì)是產(chǎn)生其流變特性的主要物質(zhì)因素,當流變物質(zhì)分布具有一定均勻性時其流變特性與流變物質(zhì)的分布形態(tài)無關(guān),僅與流變物質(zhì)本身性質(zhì)和含量比例相關(guān)。通過蠕變試驗研究了流變物質(zhì)對軟土流變參數(shù)的影響,視強親水性的膨潤土微小顆粒為具有高黏性的流變物質(zhì),均勻地把其摻入到人工土試樣中進行一維壓縮蠕變試驗,引入基于鄧肯非線性彈性的流變元件模型對蠕變試驗曲線進行擬合分析,根據(jù)流變物質(zhì)含量確定流變模型參數(shù)的變化規(guī)律,建立了模型等效黏滯系數(shù)、等效彈性模量和鄧肯非線性彈性模量與膨潤土(流變物質(zhì))含量的關(guān)系。模型擬合分析發(fā)現(xiàn),基于鄧肯非線性彈性的軟土流變元件模型與試驗結(jié)果具有良好一致性,模型參數(shù)與流變物質(zhì)含量之間關(guān)系為雙曲線方程。
[Abstract]:Rheology is a long-term deformation characteristic of soft soil, which has an important effect on the settlement of soft soil foundation. The present research shows that the rheological material with high viscosity in soft soil is the main factor to produce its rheological properties. When the distribution of rheological substances is uniform, the rheological properties are independent of the distribution of rheological substances. It is only related to the properties and content ratio of rheological substances. The effect of rheological substances on rheological parameters of soft soil was studied by creep test. The micro particles of bentonite with strong hydrophilicity were regarded as rheological substances with high viscosity, and they were uniformly mixed into the specimen of artificial soil for one dimensional compression creep test. The rheological element model based on Duncan's nonlinear elasticity is introduced to fit the creep test curve. According to the rheological material content, the rheological model parameters are determined, and the equivalent viscosity coefficient of the model is established. The relationship between the equivalent elastic modulus and Duncan nonlinear elastic modulus and the content of bentonite (rheological substance). The model fitting analysis shows that the rheological element model of soft soil based on Duncan's nonlinear elasticity is in good agreement with the experimental results, and the relationship between the model parameters and the content of rheological material is hyperbolic equation.
【作者單位】： 華南理工大學土木與交通學院;華南理工大學亞熱帶建筑科學國家重點實驗室;
【分類號】：TU447

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