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1.关于膨胀土土样测试和计算胀缩总率在对原状土样的胀和缩这两项指标,一般在压缩仪上进行测定,它受侧向限制,表现的形式是线胀,然而实际是处于三相变形即体变。现行规定很少考虑体变问题,这与地基土的实际情况不太相符合。现将测试对比说明如下: (1)膨胀土胀缩指标的测试,从表1看,胀与缩的试件直径不同在总率方面存在着较大的差
1. On the test of expansive soil samples and calculation of the total rate of expansion and contraction The two indicators of expansion and contraction of undisturbed soil samples are generally measured on a compression meter, which is subject to lateral constraints and is expressed in the form of linear expansion. Actually it is a three-phase deformation that is a body change. The current regulations seldom consider the problem of physical changes, which is inconsistent with the actual situation of the ground soil. The test will be compared and described as follows: (1) Tests for the swelling and shrinkage index of expansive soils. From Table 1, the diameters of the expansive and shrinking test specimens differ greatly in the total rate.