作　　者： ; ; ;

机构地区： 长安大学公路学院

出　　处： 《郑州大学学报（工学版）》 2011年第6期22-26,共5页

摘　　要： 土工离心模型试验技术是各类土工物理模型试验中相似性能最好的模型试验,由于试验条件限制,通常认为其进行的都是一维单面排水固结试验,而实际工程中,地基的侧向排水会加速超静水压力的消散,对其固结沉降有较大影响.为了探索更接近于实际情况的土体固结特性,及其在二维排水条件下饱和土的离心模型固结特点,基于离心机模型箱的改造设计,对典型区域饱和土体的二维固结特性进行了离心模型试验研究及其试验结果的对比分析.结果表明,在离心力场条件下,固结系数对土体的试验结果影响较大,固结系数较小的饱和土样二维固结试验特性更接近于理论;土工离心模型试验具有饱和土二维固结特性研究的基础条件. Geotechnical centrifugal model test similar to the best performance in various types of geotechnical physical model test.Because of the test conditions,centrifugal model test is used to be one-dimensional consolidation test.In fact,lateral drainage of ground will accelerate the dissipation of excess hydrostatic pressure and affect the consolidation settlement.In order to study more practical features of saturated soil consolidation in the two-dimensional drainage conditions centrifuge model test,the centrifuge model box is transformation designed.Typical causes of saturated soil in different areas under the two-dimensional drainage conditions of centrifugal consolidation tests are studied.It is indicated that,in the centrifugal consolidation force filed conditions,the consolidation characteristics of saturated soil with smaller consolidation coefficient was closer to two-dimensional consolidation theory.Geotechnical centrifuge model test can provide foundation conditions for a two-dimensional consolidation test of saturated soil.

关 键 词： 岩土工程 离心模型试验 饱和土 二维固结 孔隙水压力

领　　域： [建筑科学] [建筑科学] [建筑科学] [建筑科学]