权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Ground Improvement Technique Using Harmless Waste Material

利用无害化废弃物进行地基改良技术的开发

基本信息

批准号：
16206049
负责人：
OCHIAI Hidetoshi
金额：
$ 28.87万
依托单位：
KYUSHU UNIVERCITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

In recent years, it is expected to develop a new method of construction from not only economical and rational points but also viewpoint of environment-friendly, which considered nature environment and life circle, for a social request. It is an important problem to establish the appropriate design method in consideration of environmental load and cost reduction. Ground improvement technique using harmless waste material treatment is a new procedure for being acceptable to our society.The main conclusions obtained from this study are as follows :(1)Development of improved soil with toughness for large deformationFor improving brittle behavior of cement-treated soil, short fibers from waste materials were used here. These geomaterials mixed with construction surplus soil have ductile behavior for large deformation. The application of these materials to surface stabilization or light-weight soil was investigated by laboratory tests.(2)Deformation and bearing capacity of improved ground by the combination of surface stabilization and deep mixing methodIn order to clarify deformation and bearing capacity of the improved ground, model loading apparatus for ground improvement was developed. Appropriate arrangement of improved columns and combination with surface stabilization were investigated by loading tests of the improved ground under various conditions.(3)Evaluating deformation of the improved ground and design method in the practice of constructionFor evaluating deformation behavior of the improved ground with floating type columns, settlement model was proposed based on the consideration of stress distribution ratio and skin friction of the column. The validity was confirmed by comparing with the results of loading model test. Furthermore, design method for the combinational improvement technique was discussed from viewpoint of environmental load and cost reduction.

近年来，人们期望从经济合理的角度出发，从环境友好的角度出发，考虑自然环境和生命周期，发展一种新的施工方法，以满足社会的要求。在考虑环境负荷和降低成本的前提下，建立合适的设计方法是一个重要的问题。利用无害化废弃物处理土地改良技术是一种为社会所接受的新工艺。主要研究结论如下：(1)开发大变形韧性改良土为改善水泥处理土的脆性，采用了废土短纤维。这些土工材料与建筑剩余土混合后，在大变形条件下具有延性。通过室内试验研究了这些材料在表面稳定或轻质土中的应用。(2)地表稳定与深层搅拌相结合的改良地基变形与承载力研究为了弄清改良地基的变形与承载力，研制了改良地基模型加载仪。通过改良地基在不同条件下的荷载试验，探讨了改良柱的合理布置及与地表稳定的结合。(3)施工实践中改良地基的变形评价及设计方法为评价浮柱改良地基的变形行为，提出了考虑柱的应力分布比和表面摩擦的沉降模型。通过与加载模型试验结果的比较，验证了该方法的有效性。并从环境负荷和降低成本的角度探讨了组合改进技术的设计方法。