【作者】 黄端阳；

【导师】 马石城；

【作者基本信息】 湘潭大学 ， 结构工程， 2010， 硕士

【摘要】 模袋水泥土是一种由模型袋内填充水泥土而成的新型绿色环保砌筑材料。模袋水泥土充分结合了袋装砂(土)和水泥土两种材料的优点,造价低、污染小、施工简单快捷等优点使其在挡土结构、地基处理等方面有着非常广泛的应用前景。虽然模袋水泥土结构已经在土工工程领域有了一定的应用,但是对于该材料的工程性质研究还十分匮乏和落后,尤其是对模袋水泥土的界面力学性能方面的研究。众所周知,砌块之间的界面力学性能对整个堆砌结构的稳定性起决定性作用。因此模袋水泥土界面的力学性能研究具有非常重大的工程意义。本文主要从两方面对模袋水泥土的界面力学性能进行了研究。一、基于分形几何学理论,运用均方根坡度角法(ARMSS)估算了模袋水泥土的截面轮廓线的分形指标(β、A、D)和粗糙度系数JRC,最后结合Barton提出的10条标准轮廓线和JRC-JCS模型进行了界面抗剪强度的分形估算;二、运用ANSYS有限元软件对模袋水泥土进行了数值模拟分析,重点研究了影响接触界面力学性能的各种相关因素。文中所采用的方法为模袋水泥土的界面力学性能研究开辟了一条新的思路和途径。分形几何学的方法研究和分析表明,ARMSS法可以准确和方便地计算出实际接触界面的各项分形指标和粗糙度系数,并结合其他参数快速地推算出界面抗剪强度,从而为确定模袋水泥土界面的抗剪强度提供了一种快捷可靠的估算方法。数值模拟分析重点研究了界面摩擦系数f、法向荷载作用、水平荷载作用三个因素对模袋水泥土的水平方向最大位移、界面最大接触滑移量、界面最大接触摩擦应力和界面最大接触总应力四个力学性能指标的影响。为今后实际工程的施工和设计提供了理论依据。更多还原

【Abstract】 The sacked cemented-soil is formed by the geotechnical material bag and cemented-soil, which is a new green building material. It combines the advantages of Bags of sand (soil) and cement-soil, this kind of structure is characterized by low-cost, low pollution and easy construction, so it has a very broad application prospects in earth retaining structures and foundation treatment. Although the sacked cemented-soil has been used in some area, but the engineering properties of the material is very scarce and backward, especially for interface mechanical properties. As we all know, the interface mechanical properties determines of the stability of the whole structure. Therefore, the study is very meaningful.In this paper, two methods were used to study the mechanical properties of sacked cement-soil interface. On the one hand, based on fractal geometry theory, the ARMSS is used to estimate the interface fractal parameters (β, A, D) and JRC, and the JRC-JCS model was used to estimate the interfacial shear strength. On the other hand, ANSYS was used to study the mechanical properties of the contact interface factors. These methods of sacked cemented-soil mechanical properties of the interface have opened up a new way of thinking and ways.The results show that, Using ARMSS method we can accurately and easily calculate the interface fractal parameters, and roughness coefficient. Interfacial shear strength can be solved quickly. Numerical simulation results show that the relationship between the friction coefficient f、normal loading、horizontal load and the maximum cement bag horizontal displacement、the maximum slip、the maximum friction stress and the maximum total stress. All of the above work has played a guiding role of the actual project.更多还原