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详细分析了上海某工程勘察数据以及相关文献资料,发现FVT试验得到的灵敏度要明显小于UCT试验结果,因而会不同程度地低估上海地区各软黏土层的灵敏度。进一步研究表明,十字板重塑方式(而不是手工重塑)是造成FVT试验得到重塑土强度过高因而灵敏度偏低的主要原因,而这两种试验采用的试验方法以及原位应力对灵敏度测试结果的影响并不大。这种现象应引起工程界的重视以便正确评价我国沿海地区广泛分布的海相沉积软黏土的结构性和灵敏性。
The survey data of a certain project in Shanghai and relevant literature data are analyzed in detail. It is found that the sensitivity of FVT test is obviously lower than that of UCT test, which will underestimate the sensitivity of every soft clay layer in Shanghai. Further studies showed that the cruciate-plate remodeling (rather than manual remodeling) was the main reason for the high strength and hence the low sensitivity of remodeled soil resulting from the FVT test, and the test methods used in these two tests, as well as the in situ stress sensitivity The impact of the test results is not large. This phenomenon should draw the attention of the engineering community in order to correctly evaluate the structural and sensitivity of the marine sedimentary soft clay widely distributed in coastal areas of China.