AN INTEGRATED STUDY OF GEOTECHNOLOGY AND SEDIMENTARY ENVIRONMENT IN BRACKISH AREAS

咸水地区岩土技术与沉积环境综合研究

基本信息

批准号：
10650486
负责人：
KAMEI Takeshi
金额：
$ 1.54万
依托单位：
SHIMANE UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

This study integrates geological histories, geochemistry (sulfur, nitrogen and organic carbon concentration) and geotechnical characteristics of Holocene deposits in the Izumo Plains, southwest Japan. Total sulfur(TS), total nitrogen(TN) and total organic carbon(TOC) relationships in Holocene sediments have been used to characterize depositional environments, namely normal marine, brackish water, freshwater and euxinic sediments. The weight ratio of organic carbon to pyrite sulfur (C/S ratio) is useful for evaluating sedimentary environments. To this end, CNS elemental has led to a better understanding of sedimentary environments. The geomorphological processes of Izumo Plains with respect to sea level change during the Holocene is also described.In addition, data regarding calcite(CaCOィイD23ィエD2) content within natural silt and clay sediments with depth and its effect on strength-deformation characteristics is presented. Quantitative relationships between CaCOィイD23ィエD2 content and strength-deformation characteristics for cohesive soils of the Izumo area have been developed as a result of this work, i.e., strength-deformation characteristics increase as the CaCOィイD23ィエD2 content of the soils increases.We have attempted in this paper to demonstrate the importance of integrated studies of sedimentary environments, geotechnology, geomorphological processes during the Holocene and the usefulness of CNS elemental analysis. This study offers the designer a better understanding of mechanical behavior of Holocene deposits, leading to refinement of existing construction technology.

这项研究整合了地质历史，地球化学（硫，氮和有机碳浓度）和日本西南伊祖莫平原的全新世沉积物的岩土特征。全新世沉积物中的总硫（TS），总氮（TN）和总有机碳（TOC）关系已被用来表征沉积环境，即正常海洋，咸水水，咸水，淡水和优质沉积物。有机碳与黄铁矿硫（C/S比）的重量比可用于评估沉积环境。为此，CNS Elemental导致对沉积环境有了更好的了解。还描述了izumo plains在全新世期间的海平面变化方面的地貌过程。在自然淤泥和粘土沉积物中，有关钙（Cacoii D23E D2）含量的数据以及其深度及其对强度变形特性的影响的数据。 Cacoi D23E D2含量与强度性的特征与伊祖莫地区的凝聚土壤的强度性特征之间已经建立了这项工作的结果，即，随着CACOI D23E D2 D2的含量的增长，强度的特征会增加。在本文中，在此论文中，我们已经尝试在此论文中增加了泥潭的研究，而在此期间，泥潭的研究范围内的泥泞研究了，地理位置的重要性，地理位置的重要性，地层依次，地层次的研究，地层的泥土范围的重要性，是地层次。全新世和CNS元素分析的实用性。这项研究为设计师提供了对全新世矿床机械行为的更好理解，从而使现有的建筑技术进行了改进。