
不排水抗剪強度
The steady state strength concepts, the consolidated-undrained triaxial shear test method and the test results are introduced.
介紹了穩态強度理論的基本概念、穩态強度的固結不排水剪切試驗方法及試驗結果;
Maintaining to be constant, the maximum bending moment of the pile increases linearly with increase of the undrained shear strength .
在 不變的情況下,樁身彎矩隨着 增加呈線性增長。
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.
減少土樣擾動,準确評估粘土不排水抗剪強度的“SHANSEP”室内試驗方法及應用。
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.
通過應力路徑法導出簡潔的任意固結度的不排水抗剪強度指标的理論公式,并與實測對比,結果相當一緻。
New soil classification chart and undrained shear strength (cu) based on CPTU are developed in this paper.
提出了新的土分類圖及不排水抗剪強度的估算公式;
Available theories for analysis of the undrained shear strength were presented and compared.
對國内外現有的不排水抗剪強度分析方法進行了闡述及對比分析。
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.
一罐基礎和較薄的柔軟的存款和不排水剪切強度隨深度增加,邊緣的剪切破壞可能是至關重要的。
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.
在考慮塑性區内不排水強度是擾動度的對數函數的基礎上,得到了考慮擾動的球形孔擴張的彈塑性解答。
The undrained cyclic shear strength of the silt is about 50% of the static undrained shear strength.
該淤泥在波浪作用下的固結不排水剪切動強度約為靜固結不排水強度的50%。
In this paper, the anisotropy of undrained shear strength induced by initial anisotropic stress state is taken into consideration.
考慮初始不等壓固結狀态引起的不排水剪強度的各向異性;
不排水抗剪強度(undrained shear strength)是土力學中描述飽和黏性土在快速加載條件下抵抗剪切破壞能力的核心參數。該指标特指土體在受荷過程中孔隙水無法及時排出(即不排水條件)時表現出的抗剪能力。其數值直接反映了土體在短期荷載作用下的穩定性,是岩土工程設計中的關鍵指标。
在工程實踐中,不排水抗剪強度的應用主要體現在兩個方面:①地基承載力計算,特别是飽和軟黏土地基的快速施工項目;②邊坡穩定性分析,尤其在暴雨或地震等可能引發瞬時破壞的工況下。美國土木工程師學會(ASCE)的《岩土工程實踐指南》指出,該參數的準确測定對防止工程災害具有決定性作用。
測試方法主要包含:
根據《岩土工程學報》的對比研究,十字闆剪切試驗結果更接近實際工程條件,因其能保持土樣的原狀結構。該強度值會受孔隙水壓力、土體結構和加載速率等因素影響,在工程設計時需結合安全系數綜合考量。
undrained shear strength(不排水抗剪強度)是土力學中的重要概念,指土體在不排水條件下抵抗剪切破壞的能力。以下從定義、應用場景、影響因素及測試方法四方面進行解釋:
該參數表示飽和黏性土在快速加載(如地震、瞬時荷載)時,孔隙水來不及排出,土體體積基本保持不變情況下的抗剪強度。其本質反映了土顆粒間摩擦力和黏聚力在瞬時荷載下的綜合作用。
常用不固結不排水(UU)三軸試驗或十字闆剪切試驗測定。需注意試驗條件需嚴格模拟實際工況的排水狀态,提到莫爾-庫侖準則與臨界狀态理論可建立理論預測模型。
該參數對工程設計至關重要,實際應用中需結合土體類型、荷載速率等綜合選取。更多測試細節可參考ASTM D2166标準。
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