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长期以来,为了缩短固结试验历时,许多学者进行了各种研究。六十年代,国外有学者提出采用连续加荷的方法进行快速固结试验。控制梯度试验是连续加荷快速固结试验的一种方法,由Lowe Ⅲ.J.于1969年提出(以下称CGC法)。其基本概念是在试样上连续加荷,随时测读试样的变形量和孔隙压力。根据量测的试样压缩量,计算试验过程中任意瞬间试样的平均孔隙比,通过试验所得的无数点据绘制e～logσ′曲线,推求变形指标,并根据简单公式估算固结系数。这种方法除了克服常规试验时间长的缺
For a long time, in order to shorten the duration of consolidation tests, many scholars have conducted various studies. In the 1960s, some foreign scholars proposed using a continuous loading method for rapid consolidation tests. The controlled gradient test is a method of continuous loading rapid consolidation test, which was proposed by Lowe III.J. in 1969 (hereinafter referred to as CGC method). The basic concept is to continuously charge the sample and measure the deformation and pore pressure of the sample at any time. According to the measured compression of the sample, calculate the average void ratio of the sample at any instant in the test process. According to the countless points obtained from the test, draw the curve of e~log σ′, determine the deformation index, and estimate the consolidation coefficient according to a simple formula. This method not only overcomes the lack of routine testing time.