Abstract
A series of tests were performed to investigate the creep characteristics of soil in interactive marine and terrestrial deposit of Pearl River Delta. The secondary consolidation test results show that the influence of consolidation pressure on coefficient of secondary consolidation is conditional, which is decided by the consolidation state. The ratio of coefficient of secondary consolidation and coefficient of compressibility C a/C c is almost a constant, and the value is 0.03. In the shear-box test, the direct sheer creep failure of soil is mainly controlled by shear stress rather than the accumulation of shear strain. The triaxial creep features are closely associated with the drainage conditions, and consolidation can weaken the effect of creep. When the soft soil has triaxial creep damage, the strain rate will increase sharply.
Highlights
With the rapid development of the economy in China, infrastructure construction is increasing prosperously, which bring the long-term settlement, long-term strength, and other issues into people’s sight
A series of tests are performed to study the creep characters of soft soil in interactive marine and terrestrial deposit of Pearl River Delta
(1) The correlation between coefficient of secondary consolidation and consolidation pressure depends on the consolidation state of soil
Summary
With the rapid development of the economy in China, infrastructure construction is increasing prosperously, which bring the long-term settlement, long-term strength, and other issues into people’s sight. The soft soil is distributed widely in China, and its deformation and strength are time-dependent, so the effect of creep cannot be neglected. Some experimental and theoretical researches have been done by investigators to analyze the creep characteristics quantitatively and qualitatively. Nash et al did not agree with that viewpoint and reported that Ca increased firstly and decreased with the increasing of consolidation pressure. Some argument that focused on the relationship between consolidation pressure and Ca were discussed by Leroueil et al [4]. Bishop and Lovenbury [5] did experiments to investigate the creep characteristics of undisturbed clays, which were further studied by other researches [6,7,8,9]
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