STRENGTH OF CLAY SUBGRADES: ITS MEASUREMENT BY A PENETROMETER.

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作者：
Black, W.P.M.
机构：
来源：
TRRL Laboratory Report (Transport and Road Research Laboratory, Great Britain) | 1979年 / 901期
关键词：
CLAY - PAVEMENTS - Mathematical Models - SOILS - Testing;
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摘要：
Although the strength parameter California Bearing Ratio (CBR) used in present methods of road design is empirical in origin, it is shown that it can be related to the undrained shear strength of cohesive soils by one of two linear relationships, one characterizing soils in an undisturbed overconsolidated state and the other soils that are remolded. After validating these relationships, it is shown that a penetrometer with a small-diameter cone that is capable of measuring the shear strength of a soil can be used to estimate its CBR. The penetrometer can then be used to characterize soil strength in terms of either shear strength or CBR.
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