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Study on the Constitutive Relations for the Quasi- overconsolidated Soils, Especially, Long-Term Consolidation

准超固结土特别是长期固结土本构关系研究

基本信息

批准号：
61460164
负责人：
AKAI Koichi
金额：
$ 2.37万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

项目摘要

First, a study on the physico-chemical characteristics of the natural soils (Osaka seabed aluvial and deluvial marine clays, and sediment of Lake Biwa) using SEM and some kinds of physical testing equipments was carried ot. Also used were the artificial cemented clays which have similar characteristics to the natural cemented clays. From the results, we were able to discuss the effect of geological cementation on the soil structure.Secondly, not only the isotropic consolidated-undrained compression tests but some kinds of consolidation tests were performed in the laboratory with the artificially cemented clays. From the results was discussed the long-term consolidation of the quasi-overconsolidated soils from the view points of the secondary compression and the cementation. Also investigated was the behavior of the cemented clays. Moreover, the movement of soil particles and formation ofshear bands during shear were observed, using the special direct shear test equipment in SEM.Finally, We discuss the possibility of establishing the constitutive relations of the quasi-overconsolidated clays taking the time-hardening factor into consideration.

首先，利用扫描电子显微镜和各种物理测试设备对大阪海床冲洪积海相粘土和琵琶湖沉积物等天然土壤的理化性质进行了研究。还使用了与天然水泥粘土具有相似特性的人造水泥粘土。其次，在室内对人工胶结粘土进行了各向同性固结不排水压缩试验和几种固结试验。从二次压缩和胶结的角度讨论了准超固结土的长期固结问题。此外，还研究了胶结粘土的特性。利用SEM专用直剪试验装置，观测了剪切过程中土体颗粒的运动和剪切带的形成。最后，讨论了考虑时间硬化因素建立准超固结粘土本构关系的可能性。