室内固结系数的一种推算方法

A method for evaluating coefficient of consolidation

室内固结试验确定固结系数常采用时间平方根法和时间对数法 ,这两种方法均属作图法。其缺点是在作图过程中人为因素影响较大 ,而且试验初始阶段不可避免的初始压缩以及试验最后阶段的次固结等也对试验结果有较大影响。本文从一维固结理论出发 ,导出了主固结沉降与其速率的关系 ,利用这一关系提出了一种固结系数的推算方法 ,该方法无需固结试验初始阶段和最后阶段的数据 ,从而避免了初始压缩和次固结的影响 ,同时该方法还可以加快固结试验的进程。

In consolidation tests, the common methods for evaluating coefficient of consolidation are Casagrande's  log t method and Taylor's t method,both of which are graphical methods. In these two methods, there are some large influences of the man made factors during graphical construction.In this paper, the relationship of primary consolidation settlement with its velocity is developed based on the one dimensional consolidation theory, which is used to propose a new method for evaluating coefficient of consolidation. The new method does not need the test data of early and last stages, so it avoids the influence of the initial and the secondary compression,and can accelerate the course of consolidation test.