一般自然灰岩坑形成机理是由于有份量的水饱和土导致地下石灰岩洞顶层坍塌，或者由于水加宽了石灰岩床的天然裂缝而导致。
Natural sinkholes generally form when heavy, water-saturated soil causes the roof of an underground limestone cavity to collapse, or when water widens a natural fracture in limestone bedrock.
最后将分析结果进行了对比，结果表明：本文的退化解和饱和土扭转振动解是一致的。
It was shown that the present regressive solution was consistent with the solution of torsional vibration in saturated soil layer.
研究了频域内半空间饱和土中单桩在瑞利波作用下的动力响应。
The frequency domain response of single pile embedded in half-space saturated soil and subjected to Rayleigh waves was investigated.
分析了水平集中荷载作用在半空间饱和土表面时的瞬态问题。
The transient dynamic response of horizontal loads on the surface of saturated soil was studied in this paper.
由于河流的淤积和冲刷，沉积河谷场地的沉积层多为饱和土。
As aresult of fluvial scouring and aggrading the riverbed, the alluvial layer of circular-arclayered alluvial valleys is fluid-saturated porous medium.
基于有效应力动力分析法，对爆炸荷载作用下饱和土与地下建筑结构相互作用的特性进行了分析。
Based on the dynamics analytical method of efficiency stress, the reciprocity of saturation soil and its structure in the blasting load is analyzed.
临界状态模型是非饱和土结构理论中的一个重要的内容。
The critical state model is an important part of unsaturated soil structure theory.
本文以非饱和土抗剪强度理论为基础，引入了渗透力的概念，利用有限单元法进行了降雨条件下岩质边坡稳定性的分析。
The paper brings the conception of seepage force and use finite element method to analyze rock slope stability under rainfall, based on unsaturated earth drained shear strength theory.
基于己建立的非饱和土中的波动方程，研究了瞬间扭转荷载作用下桩的动力响应问题。
Based on the wave equation in unsaturated soil, the dynamic response of a pile under transient torsional loading was theoretically investigated.
本文在评价了现有非饱和土有效应力参数确定方法的基础上，提出了一种新的求解方法。
Based on the assessment of existing methods for determining the effective stress parameters of unsaturated soil, a new method is proposed.
分析了非饱和土体抗剪强度参数的计算方法，得出非饱和土抗剪强度公式的实用形式，并推导了抗滑稳定安全系数的计算公式。
Deducing the calculation method of shear strength of unsaturated soil, the applied equation is searched, from which the formula of safety factor of embankment's stability is derived.
最后分析了土颗粒半径差异、土体平均粒径大小对非饱和土强度的影响。
At last, the effect of soil gradation on the shear strength of unsaturated soils is analyzed qualitatively.
基于湿吸力概念，分析并给出了有效应力公式，建议了非饱和土的状态分类及有效应力原理。
Based on this absorbed suction concept, the classification of saturation in soil and a principle of effective stress are proposed for unsaturated soils.
提出了一个较完整的非饱和土的非线性模型。
基于作者提出的饱和土弹性波动方程，研究了饱和地基上含刚核弹性圆板在竖向集中谐和力作用下的振动特性。
A study of the vertical vibration of a flexible plate with rigid core resting on saturated ground is presented in this paper.
采用非饱和土强度理论和极限平衡法，得出考虑降雨入渗渗流力作用下的路基稳定性计算公式。
Based on the unsaturated soil strength theory and limit equilibrium method, this paper obtains the calculating formulae for the roadbed stability under the effect of seepage force of rain.
本文从研究降雨类型对非饱和土斜坡内孔隙水压力的影响入手，来研究雨峰的位置对斜坡的稳定性的影响的。
Therefore, the effect of the occurrence numbers and moments of rainfall peak on pore water pressure within unsaturated soil slopes are investigated.
但目前，在土石坝渗流安全分析和坝坡稳定分析中较少考虑非饱和土渗流作用的影响。
But at present, the effect of seepage flow in unsaturated soils is often ignored in slope stability analysis, such as earth DAMS, masonry DAMS and dikes.
本论文进行了非饱和土气态水迁移的理论研究，得到非饱和土中气态水迁移引起的含水量变化方程。
The thesis studies the theories of water vapor transfer in unsaturated soil, and gets the water contents equations of water vapor transfer in unsaturated soils.
从非饱和土土水特征曲线方程出发，根据渗透函数和土水特征曲线的关系，推导出了非饱和土渗透函数方程。
Based on the equation of soil water feature curve and the relationship between soil water feature curve and permeability function, the permeability function equation of unsaturated soil is derived.
由于非饱和土的复杂性和多变性，其渗透特性明显不同于饱和土，并且试验难度较大。
For complexity and diversity of unsaturated soil behaviors, there lies a great difference in permeability characteristics between unsaturated soil and saturated soil.
回顾了几十年来非饱和土有效应力研究的主要成果。
The main research results of effective stress principle of unsaturated soil several decades are reviewed.
旨在介绍一个描述非饱和土孔隙气、水、汽、热耦合运动的理论模型。
A theoretical model has been proposed to describe fully coupled moisture, air and heat transfer in unsaturated soils.
在降雨对非饱和土斜坡稳定性影响的研究中，对降雨强度、降雨持续时间和降雨量的研究比较成熟，而研究雨型对斜坡稳定性的影响比较少。
The investigation on the relationship between the stability of unsaturated soil slopes and rainfall mainly focuses on the effect of rainfall intensity, duration and rainfall amounts.
试验证明，饱和土属于应变硬化介质，在激波动力加载条件下，土中应力波将保持其激波特征不变。
The tests prove that saturated soils are a kind of strain hardened media and stress wave will maintain shock wave characteristic invariant during shock wave dynamic loading.
如何评价土结构性对天然沉积饱和土的力学性状的影响是一个非常重要的研究课题。
How to evaluate the effects of soil structure on mechanical behavior for natural sedimentary soils is an important issue in geotechnical engineering.
针对饱和土固结问题，利用可变形多孔介质中流体渗流的流固耦合有限元数值模型，对该问题进行了数值模拟。
The soil consolidation can be simulated by using a finite element numerical model of fluid-solid coupling of fluid seepage in a deformable porous medium.
研究表明，非饱和土的工程性质不仅取决于土的组成、结构和应力状态，还与土中的吸力密切相关。
It is known that the behavior of unsaturated soil depends not only on the mineralogical composition, soil structure, and stress state, but also on soil suction.
对不同的土样进行了一系列的室内试验，试验表明，模型能很好地描述非饱和土介质介电常数与体积含水量之间的关系。
From the experimental results, it was found out that the relation curves of soil samples were almost consistent with each other and fittd the model well.
根据土水特征曲线可以确定非饱和土的强度、体应变和渗透系数，甚至可以确定地下水面以上水份分布。
Strength, volumetric strain and permeability coefficient, and even moisture-distribution above ground water surface can be determined by the soil-water characteristic curve.
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