原位十字板与三轴UU试验测试值的差异分析

原位十字板剪切试验和室内三轴UU试验是岩土工程中测定饱和软黏性土不排水抗剪强度的两种常用测试方法,两种试验方法各有利弊,在工程计算中选用何种强度指标值至关重要;为了了解不同地区的试验情况,综合不同的观点和认识,更好地保证研究成果的代表性,本次对比试验区选在上海和天津,通过对上海、天津等沿海地区多次试验的对比,来分析两种测试值的差异、产生差异的原因以及在工程应用中如何合理取值等。

Analysis on the differences of test values from in-situ vane tests and UU triaxial tests

In-situ vane shear tests and laboratory UU triaxial tests are two common test methods for determining undrained shear strength of saturated soft clay in geotechnical engineering. The two methods have their own advantages and disadvantages. In engineering calculations, it is very essential to adopt the proper strength indices. In order to know the test circumstances in different areas, the different viewpoints and knowledge are summarized to better ensure the representatives of the study results, and the test areas in Shanghai and Tianjin are chosen. In this paper, the differences between the test values from the two raethods and the variant reasons are analyzed, and how to adopt the reasonable values for engineering practice is discussed by comparing several tests that were practiced in Shanghai, Tianjin and other coastal areas.