膨胀土胀缩等级评判是膨胀土地区工程建设的重要工作。
The swell shrink grade judgment of expansive soil is an important work for engineering construction in the expansive soil area.
特别是对影响膨胀土胀缩特性的某些因素作了较深入的研究。
Especially, the factors influencing swell and contraction properties of expansive soil are thoroughly investigated.
膨胀土胀缩性与土性指标之间的关系存在较大的模糊性和地域性。
There are fuzziness and regionalism between the expansion and shrink of soil and the performance indexes.
原状膨胀土在吸力和净围压较低时的剪胀和软化特性主要是由于结构损伤的演化引起。
The dilation and softening characteristics of natural expansive soil while shearing under low net mean stress and suction are mainly caused by the evolution of damage structure.
将该方法应用于膨胀土的胀缩等级分类，其合理性和有效性得到了验证。
The method has been applied to determine expansive scale of expansive soils and its reasonableness and effectiveness is proved by the example.
对盐胀和冻胀规律的研究有助于深入认识硫酸（亚硫酸）盐渍土的工程性质。
Research about salt and frost heaving is helpful to further know the engineering properties of sulfate(sulfurous) saline soil.
提出考虑土的应变软化、剪胀（剪缩）性和应力路径影响的非线性弹性模型。
Suggest the nonlinear elastic Constilutive model taking into the account of strain-softening, shear dilatancy(shrinkage)properties and stress path.
东区段主要的地质灾害是地面沉降、地裂缝和膨胀土的胀缩灾害。
In the east section, the hazards are mainly ground subsidence, ground cracks and expansion and shrinkage of expanded soils.
针对膨胀土特殊工程性质，分析了胀缩变形量的影响因素。
Based on special engineering properties of expansion soils, influence factors of swell-shrink distortion are analyzed.
干密度值较高时，土样处于密实状态，表现出剪胀特性，有效主应力比-应变曲线近于应变软化型；
When the dry density is relatively high, this dense specimen shows shear dilatation characteristics, and the effective principal stress ratio tends to be strain softening phenomenon.
荷载对干湿循环过程中膨胀土的胀缩幅度及强度衰减具有明显抑制作用。
The effects of load in certain range were to restrain the swelling-shrinkage deformation and the attenuation of shear strength.
从土类及盐性角度研究了氯盐渍土的盐胀规律。
The salt expansion laws of chlorine saline soil are researched from soil types and salt.
依据扁铲侧胀试验的结果，对桩侧土水平抗力系数的比例系数进行了估算，并估算出单桩水平承载力设计值；
Based on dilatometer test result, the proportional coefficient of lateral resistance coefficient in pile's lateral soil, and the design value of single pile lateral bearing capacity is estimated.
研究了路基土场土的物理性能、矿物组成及胀缩特性，采用多种方法综合评价土场土膨胀潜势；
The physical properties, mineral composition and expansive-shrinkage characteristics of the borrow soil were studied, and the evaluation of expansive potential was carried out.
基于各向异性情况下的土体弹性本构关系理论分析，认为土的可恢复剪胀现象可部分归因于土的各向异性引起的弹性剪胀。
Based on the theoretic analysis of the anisotropic elastic constitutive relation, the reversible dilatancy was partly explained by the elastic dilatancy deformation caused by soils anisotropy.
当压力一定时，土的胀缩变形幅度与水分变化量呈线性关系。
When pressure is kept constant, the relationship between the magnitude of soil expansion and shrinkage deformations and the moisture movement appears linear.
膨胀土是一种吸水膨胀、失水收缩、胀缩变形显著的粘性土，其主要工程性质对公路有比较强的破坏作用，要减少膨胀土对路基路面的破坏，必须从设计上采取措施加以处理。
Expansive soil is a kind of swell-shrinking clay with strong damaging to highway. In order to lessen the damage, some efficient measures must be taken with from design.
土的密度越大，有效平均正应力越低，土的剪胀性就越大。
The larger the density, the lower the effective mean normal stress, the more dilative response is.
盐渍土的盐胀对建筑物，如铁路、公路、水利、房屋等造成了巨大危害。
Harm has been caused by salt expansion to constructions, such as railroad, highway, water conservancy and buildings.
所提出的参数求取方法可以使多重势面模型较好地反映剪胀性土的体变规律，计算分析成果有助于进一步研究和应用多重势面模型。
The calculation and analysis concerned in this paper may be beneficial for the further study and application of the multi-potential surface model.
在降温过程中，盐渍土中水分向冷端迁移，易溶盐亦随之向土体冷端迁移；土壤溶液中的硫酸钠呈水合芒硝析出，因而使土体盐胀。
In the process of lowing the temperature, both the water and the easy soluble salt move to the cold end in the soil body.
采用三种固化剂对高含盐量的氯盐盐渍土和硫酸盐盐渍土进行固化，研究了它们的干缩和湿胀特性。
Dry shrinkage and wet expansion characteristics of saline soils containing rich chlorine and sulfate, solidified by three sorts of soil stabilizers were investigated.
当土颗粒产生剪切位移时，土样发生剪胀，土体的原始结构完全被破坏。
The original structure of soil sample is completely destructed while the displacement of the soil grains are produced, by means of the dilatation of the soil sample.
从士的类别角度研究了天然盐渍土的盐胀规律。
The salt expansion laws of crude saline soil were researched by use of three kinds of soil.
文章论述了我国地区性土（黄土、红土和胀缩土）的地理分布和工程地质特性，分析了各类地区性土的物质成分和微结构特征以及它们的区域性变化规律。
The geographic distribution of regional soils such as loess soil, laterite soil andexpansive soil in China and their special engineering properties are briefly described in this paper.
结果表明膨胀土的胀缩变形过程并不完全可逆。
It was shown that the swelling-shrinkage deformation of expansive soils was not completely reversible.
粗粒土具有明显的剪胀剪缩性，为非虎克材料。
Coarse-grained soils exhibit evident dilatancy, and they do not obey the Hook's law.
当土颗粒产生剪切位移时，土样发生剪胀，土体的原始结构完全被破坏。
The original structure of soil sample is completely destructed while the displacement of the soil grains are produced, by means of the dilatation o...
通过建立一个三维有限元模型，研究土钉在不同上覆压力和剪胀作用下的土钉抗拔行为。
In this paper, a three-dimensional (3d) finite element (fe) model is developed to simulate the behavior of soil nail considering the effects of overburden pressure and dilation.
通过建立一个三维有限元模型，研究土钉在不同上覆压力和剪胀作用下的土钉抗拔行为。
In this paper, a three-dimensional (3d) finite element (fe) model is developed to simulate the behavior of soil nail considering the effects of overburden pressure and dilation.
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