土体

By comparison between the parameters before and after the test, the development regulation of physico-mechanical parameters of the substratum of pit is found.

结合深基坑的突水问题进行室内模型试验研究，通过对比试验前、后的参数，发现突水前后基底土体物理力学性质的变化规律。

For the south tunnel, the scope of consolidation is determined by analyzing the circular failure surface resulted from the integral landslide.

对南洞按土体整体滑移失稳可能形成的圆弧滑动面来确定加固范围。

Deep soil movement monitoring is a very important task during the excavation and sustainment of large foundation pit.

在基坑开挖和支护过程中深部土体的水平位移监测是一项十分重要的工作。

Based on the large-scale model test on soil-pile-structure interaction, as a part of the project financed by nature science national fund, analysis of soil-foundation -structure dynamic interaction (NO.50278033), some issues about modeling of soil-structure interaction system are discussed in this thesis. These issues mainly include simulation of soil infinity, selection of dynamic constitution model of material, simulation of the changing status nonlinearity on soil structure interface, meshing, using of symmetry principle and so on.

结合国家自然科学基金课题《地基-基础-上部结构相互作用体系动力特性研究》(NO.50278033)，以大比例桩筏基础框架模型试验为基础，运用通用有限元软件MARC，首先对土—框架结构动力相互作用体系进行有限元计算建模的一些问题作了研究，主要包括粘—弹性人工边界的施加、土域范围的选取、材料本构模型的选用、土体与结构交界面上状态非线性的模拟、网格划分以及对称性的应用等。

The experimental results indicate that the changes of resistivity, temperature and deformation during freeze-thaw cycles are real-time and synchronical, which also proves that it is feasible to study the change of soil structure during freezing and thawing by using electrical resistivity method.

试验结果表明：冻融循环过程中电阻率与冻融变形的变化是实时的、完全同步的，利用电阻率特性研究冻融过程土体结构变化是可行的；每次冻融冻土电阻率随着冻融次数增加呈指数关系减小，融土电阻率随冻融次数增加呈指数关系增加；每次冻胀量与融沉量随冻融次数的增加而减小，平均干密度随冻融次数增加而增加，并且经过5次冻融循环后冻胀融沉量和干密度均趋于稳定。

4When the cover settles differentially, some part of it will be subjected to tension and will undergo tensile strain.

4垃圾填埋场的最终覆盖系统过大的差异沉降会导致土体开裂和土工膜断裂。

The thixotropy of wetland soil is studied at three depths of soil, which can obtain the coupling effect of depth and stewing time on recovery of soil shear strength.

对湿地软土的触变性进行了3个不同深度处的试验研究，得到了深度和静置时间对扰动后土体抗剪强度恢复的耦合影响。

When the resistive moment of surrounding soil is less than the torsional moment of eccentric jacking force, stability failure of pipeline occurs and pipes deviates from the designed axes.

管道失稳是由于管道周围土体提供的抵抗力矩小于偏心顶推力而产生的扭转力矩，造成管节偏离设计轴线。

Based on the finite strain theory, a subroutine‐UEL for ABAQUS is developed , and the residual pore pressure under wave load is computed, and stability of soil around pipeline and seabed is analyzed. Regarding the liquefaction soil as model, a subroutine‐UMAT for ABAQUS is developed , and the behavior of pipeline in liquefaction soil analysis qualitatively.

并据此模型对复杂波浪荷载下埋置管线的动力响应进行分析，发现波浪的非线性和随机性以及管线-土体之间的接触效应对计算结果的影响十分显著，如果忽略这些因素，则会在分析埋置管线动力响应时造成较大误差。4。

Its magnitude depends on the freezing velocity and the density condition of unfrozen regions.

土体的冻胀力与温度状况密切相关的。

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