The post-yield behaviour of four Eocene-to-Jurassic UK stiff clays
The post-yield behaviour of four Eocene-to-Jurassic UK stiff clays
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DOI：
10.1680/geot.13.p.043
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发表时间：
2014
期刊：
影响因子：
5.8
通讯作者：
R. Kamal;M. Coop;R. Jardine;A. Brosse
中科院分区：
文献类型：
--
作者：
R. Kamal;M. Coop;R. Jardine;A. Brosse
详细研究了四种中塑性重度超固结英国硬粘土的屈服后行为。鉴定、取样和测试了刚硬到硬的高尔特粘土、金默里奇粘土和牛津粘土的亚层；这些和早期伦敦黏土研究中所研究的相，有着大致相似的沉积历史。考虑从侏罗纪到始新世的类似沉积物分布的目的是为了确定地质年龄或埋藏深度的任何强烈影响。考虑到代表性元素体积在测量这类土壤的强度时至关重要，四种粘土中有三种存在强烈的裂隙细观结构，这对它们的有效抗剪强度有控制作用。所有四种土壤在剪切作用下都是脆性的，当剪切到足够的位移时，其残余抗剪强度较低。通过比较天然和重建粘土的性能，进一步研究了硬粘土。
A detailed study is described of the post-yield behaviour of four medium-plasticity heavily overconsolidated UK stiff clays. Sub-layers of the stiff-to-hard Gault, Kimmeridge and Oxford clays were identified, sampled and tested; these, along with facies investigated in an earlier London Clay study, had broadly similar depositional histories. The intention in considering a spread of similar sediments from the Jurassic to the Eocene was to allow any strong effects of geological age, or burial depth, to be identified. A strongly fissured meso-structure was present in three of the four clays, which had a controlling influence on their effective shear strengths, considering that the representative element volume is of paramount importance in measuring the strengths of such soils. All four soils were brittle in shear and, when sheared to sufficient displacements, developed low residual shear strengths. The stiff clays were investigated further through comparisons between natural and reconstituted behaviour, usi...