土体

This dissertation discusses the anisotropic behavior of soft clay and its effect on the deformation of excavations based on the study of other researchers. The main achievements of this thesis are as follows: 1 Firstly, an anisotropic bounding surface constitutive model(Wei, 2005) is recommended, secondly, the deformation of triaxial compression tests and triaxial extension tests under condition of isotropic consolidation is analyzed qualitatively.

基于此，本文在前人研究的基础上，探讨了土体的初始各向异性以及应力诱发各向异性对基坑开挖变形的影响，取得了如下研究成果： 1、利用魏星(2005)提出的各向异性弹塑性本构模型，分析了具有初始各向异性土样在等向固结三轴压缩和拉伸试验中的变形特性。

Considering the bounding surface plasticity constitutive model of soil, the program, named as WSDP, is coded to analyse the dynamic elastoplastic responses of two-dimensional soil layer.

讨论土体本构关系、土层应力历史状态、人工边界的设置以及为消除人工边界高频振荡而采用的黏性阻尼等因素对土层动力反应的影响。

A modefied egg function has been proposed and used in a bounding surface model. This model has potential value of applicaton since it reflects better actual situation of soil mass under loading. That is: when a stress point is still within the yield surface, the unrccovered plastic deformation would occur as stresses change, and using closed smooth function makes stress modification in the FEM much easier.

文中提出了一个改进蛋形函数，并采用这个函数建立了边界面模型，该模型由于机理上更好地反映了土体受荷时的实际情况，即当应力点在屈服面内时，随着应力状态的改变，仍然可以产生不可恢复的塑性变形，而在计算功能上由于使用了封闭光滑的边界面，不存在角点问题使有限元程序计算显得很方便，从这两个方面看，该模型具有潜在的应用价值。

Considering the characteristic of dynamic consolidation in soft soil, L'place transformation is carried out on the basis of relaxed resolution problem of dynamic consolidation in saturated soft soil proposed by Zienkiewicz. With calculus of variations as the principal theory, the function of dynamic consolidation equation is constructed, and further, dynamic consolidation equation in matrix forms is deducted.

本文针对软土地基上动力固结法的特点，在Zienkiewicz提出的饱和土体动力固结定解问题的基础上做拉氏变换，以变分原理为基本理论，构造动力固结方程的泛函，进一步推导得到动力固结方程的矩阵形式表达式。

A capillary rise apparatus was self-made to stimulate the capillary-effect of subsoils under the impact of groundwater.

3为模拟地下水作用下路基底部土体的毛细效应，自制了毛细上升试验装置。

The results showed that the maximum height of the capillary water rise of layered soil was mainly determined by the sand soil texture, position, thickness and their mutual relationship, and they also were closer connected with other soil texture in the profile.

针对目前层状土体剖面夹层土质对毛管水分最大上升高度的影响存在较大分歧，以沙土夹层为例，从土坡水动力学的角度，通过实验和理论分析，分不同情况对层状土城的毛管水最大上升高度进行了系统研究。

Under constant groundwater table boundary condition,water content distributions along the heights of capillary rise of samples under three different compactness are presented in this paper.And the isothermal moisture diffusion coefficient was also obtained by Bruce method.

在常地下水位边界条件下，获得了三种不同压实度土体的含水量随高度的分布规律，并利用Bruce推导的方法计算了等温水分扩散系数。

The research result shows that the CBR value of soil treated by HPCM is increased.

结果表明，改良土体的CBR值和耐水性显著提高。

The interaction between the foundation and soil is taken into account in the numerical method, which can simulate the actual working mechanism of the dynamic equipment foundation and circumambience soil. Thus, the numerical method has the advantage of more accuracy and reliability over the specification method based on the single mass model.

数值方法考虑了基础和地基的相互作用，更能模拟动力设备基础及周围土体的实际工作机制，较基于单质点模型基础之上的规范方法有更高的精确性和更大的可信度。

The microstructure of clayey soils is an important quality index of soil mass, which reflects the ...

粘性土的微观结构是土体的一个重要质量指标。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐