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基于扁铲侧胀试验(DMT)的基本原理,简要地介绍了利用DMT的C值消散试验求解水平向固结系数的理论与方法。结合商丘—合肥—杭州(商合杭)铁路工程湖州试验段与上海—南通(沪通)铁路工程常熟试验段的DMTC消散试验进行了实例分析研究。结果表明:DMTC消散试验与孔压静探消散试验获取水平向固结系数较为接近,二者在均质土层中相关性较好,在非均质土层中相关性较差;与DMTC消散试验及孔压静探消散试验获取的水平向固结系数相比,室内试验获取的水平向固结系数明显偏小,与其他研究者的成果一致。
Based on the basic principle of flat dilatometer test (DMT), the theory and method for solving the horizontal consolidation coefficient using DMT C-value dissipation test are briefly introduced. Combining the DMTC dissipation test of Changshu test section of Shangqiu-Hefei-Hangzhou (Shanghehang) railway project Huzhou test section and Shanghai-Nantong (Shanghai-Shanghai) railway project, the case study was conducted. The results show that the DMTC dissipation test is close to that of the pore pressure static dissipative test to obtain the horizontal consolidation coefficient, and the correlation between the DMTC and the DMTC is relatively good in the homogeneous soil and poor in the heterogeneous soil. Compared to the horizontal consolidation coefficient obtained from the test and the pore pressure static dissipative test, the horizontal consolidation coefficient obtained from the laboratory experiment is obviously smaller, which is consistent with the results of other researchers.