用室内试验方法研究了土体应力状态变化对其力学性质的影响。
The statistical relationship is proposed between mechanical properties of soils and the stress disturbance degree.
岩土体应力状态靠近极限状态线时，岩土体塑性剪切变形越来越大，趋于破坏；
The plastic deviatoric deformation becomes larger and larger and geomaterials tend towards to damage, when the stress state of geomaterials is close to the critical state line.
结果表明，在基坑开挖过程中，基坑壁附近的土体应力状态变化显著；锚杆锚固段应力呈非线性递减分布；
The result indicates that when the foundation pit is excavated, the soil stress state near the foundation pit wall changes obviously;
地下水位上升和地下水在土中渗流引起土体应力状态变化是导致斜坡在降雨过程中或降雨后变形与破坏的关键因素。
The variation in stress state of soils due to the rise of ground water level and seepage of ground water is critical to the deformation and failure of slopes during and after heavy rainfall.
本文主要研究隧道盾构掘进施工中周围受扰动土体应力状态和应变状态的变异，以及由土体应力状态和应变状态的改变引起土体力学性质变异的特性。
The variation of stress state and strain state induced by tunnel shield driving in soils is studied, and the variation of soil mechanical properties is studied too in this paper.
拱区屈服土体应能通过应力调整达到新的平衡状态。
The soil in arch area could attain new equilibrium by stress adjustment after yield.
土体变形特征与其经历的应力状态有关。
Soil deformation relies on the stress states it has experienced.
采用传统的极限平衡方法来分析边坡的稳定，没有考虑土体本身的应力—应变关系，其工作状态是虚拟的。
Analyzing the stability of the side slope through classical ultimate balance method, the working state is fictitious without considering the stress-strain relation of the soil mass.
采用数值模拟方法，得出该基坑开挖支护过程中土体的应力状态分布变化情况及基坑周边某些点的位移变化情况。
The numerical simulation method is adopted to get the distribution of the soil stress and the displacement variety of some points during the excavating and supporting process.
研究方法：根据弹塑性理论，推求得到岩溶地基中土洞周边土体的应力状态。
Research methods: Based on the elastic and plastic theory, the stress distribution of soil cave in foundation can be deduced in karst region.
该模型考虑了自由面边界、流量边界、基坑围护连续墙、井边界、土体非线性特性、土的渗透性随应力状态的变化。
This model considers free surface boundary, flux boundary, horizontal flow barrier, well boundary, non-linear characteristics of soils and dynamic change of permeability coefficient with stress state.
由于结构性、初始各向异性和复杂的应力路径的共同影响，往往使极限状态设计如何确定天然土体渐进破损的强度及参数变得复杂而困难。
The mutual effects of the structure, initial anisotropy and complex stress path make it complicated and difficult to determine the progressive destructive strength and parameters of natural soils.
采用从初始应力点到状态边界面的距离为参数的系数来修正硬化准则以模拟土体小应变条件下的应力应变特征。
A function of distance between initial stress strain point and point at state boundary surface is adopted to simulate stress strain behaviour of soil in condition of small strain.
从土体极限应力状态线所致的各向异性出发，结合原状土的力学特性，给出了原状土的应力空间、应力增量变换公式。
Based on the anisotropy induced by the critical state line, the idea of transformation of stress space is presented.
从水力条件出发，研究了应力状态对土体渗透侵蚀起动及破坏水力梯度的影响。
From the hydraulic point of view, the influence of complex stress states on the initiation and development of seepage erosion is investigated.
结果表明，桩土相互作用阻尼系数随着桩周土应力增大而增大，而且还与土质和土体的含水状态有关。
It was shown that damping coefficient increased with increasing stress of soil around pile and was influenced by soil property and water content.
地下水位的变化，将使土洞周围土体的应力状态发生改变，并有可能导致土洞周围土体产生塑性破坏，使土洞进一步扩大甚至塌陷。
The stress distribution around the soil cave will changed due to variation of groundwater level, then the soil mass around the cave may plastically fail and the soil cave may enlarge or collapse.
地下水位的变化，将使土洞周围土体的应力状态发生改变，并有可能导致土洞周围土体产生塑性破坏，使土洞进一步扩大甚至塌陷。
The stress distribution around the soil cave will changed due to variation of groundwater level, then the soil mass around the cave may plastically fail and the soil cave may enlarge or collapse.
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