
不排水抗剪强度
The steady state strength concepts, the consolidated-undrained triaxial shear test method and the test results are introduced.
介绍了稳态强度理论的基本概念、稳态强度的固结不排水剪切试验方法及试验结果;
Maintaining to be constant, the maximum bending moment of the pile increases linearly with increase of the undrained shear strength .
在 不变的情况下,桩身弯矩随着 增加呈线性增长。
The concept and application of SHANSEP were proposed as a new laboratory test method which can minimize the sampling disturbance and more correctly estimate the undrained shear strength of clay.
减少土样扰动,准确评估粘土不排水抗剪强度的“SHANSEP”室内试验方法及应用。
A ******r theoretical solution for undrained shear strength index of saturated clayey soil under arbitrary degree of consolidation is deduced by the means of stress path method in this paper.
通过应力路径法导出简洁的任意固结度的不排水抗剪强度指标的理论公式,并与实测对比,结果相当一致。
New soil classification chart and undrained shear strength (cu) based on CPTU are developed in this paper.
提出了新的土分类图及不排水抗剪强度的估算公式;
Available theories for analysis of the undrained shear strength were presented and compared.
对国内外现有的不排水抗剪强度分析方法进行了阐述及对比分析。
For a tank foundation with a relatively thin soft deposit and undrained shear strength increasing with depth, the edge shear failure is likely to be the critical one.
一罐基础和较薄的柔软的存款和不排水剪切强度随深度增加,边缘的剪切破坏可能是至关重要的。
On the basis of the undrained shear strength being the logarithm function of the disturbance degree, the elastoplastic solution of the cylindrical expansion is obtained.
在考虑塑性区内不排水强度是扰动度的对数函数的基础上,得到了考虑扰动的球形孔扩张的弹塑性解答。
The undrained cyclic shear strength of the silt is about 50% of the static undrained shear strength.
该淤泥在波浪作用下的固结不排水剪切动强度约为静固结不排水强度的50%。
In this paper, the anisotropy of undrained shear strength induced by initial anisotropic stress state is taken into consideration.
考虑初始不等压固结状态引起的不排水剪强度的各向异性;
不排水抗剪强度(undrained shear strength)是土力学中描述饱和黏性土在快速加载条件下抵抗剪切破坏能力的核心参数。该指标特指土体在受荷过程中孔隙水无法及时排出(即不排水条件)时表现出的抗剪能力。其数值直接反映了土体在短期荷载作用下的稳定性,是岩土工程设计中的关键指标。
在工程实践中,不排水抗剪强度的应用主要体现在两个方面:①地基承载力计算,特别是饱和软黏土地基的快速施工项目;②边坡稳定性分析,尤其在暴雨或地震等可能引发瞬时破坏的工况下。美国土木工程师学会(ASCE)的《岩土工程实践指南》指出,该参数的准确测定对防止工程灾害具有决定性作用。
测试方法主要包含:
根据《岩土工程学报》的对比研究,十字板剪切试验结果更接近实际工程条件,因其能保持土样的原状结构。该强度值会受孔隙水压力、土体结构和加载速率等因素影响,在工程设计时需结合安全系数综合考量。
undrained shear strength(不排水抗剪强度)是土力学中的重要概念,指土体在不排水条件下抵抗剪切破坏的能力。以下从定义、应用场景、影响因素及测试方法四方面进行解释:
该参数表示饱和黏性土在快速加载(如地震、瞬时荷载)时,孔隙水来不及排出,土体体积基本保持不变情况下的抗剪强度。其本质反映了土颗粒间摩擦力和黏聚力在瞬时荷载下的综合作用。
常用不固结不排水(UU)三轴试验或十字板剪切试验测定。需注意试验条件需严格模拟实际工况的排水状态,提到莫尔-库仑准则与临界状态理论可建立理论预测模型。
该参数对工程设计至关重要,实际应用中需结合土体类型、荷载速率等综合选取。更多测试细节可参考ASTM D2166标准。
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