An experimental study of applicability of centrifuge loading test on naturally deposited soil

自然堆积土离心加载试验适用性试验研究

• 批准号: 05452241
• 负责人: KUSAKABE Osamu
• 金额: $ 2.5万
• 依托单位: HIROSHIMA 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: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452241/
• 关键词: Model Test; Centrifuge Model; Bearing Capacity; Similarity low; Shallow Foundation; Undisturbed Sample; Sandy Soil; Particle Size Effect; 不撹乱

The applicability of centrifuge test with a scale down model to practical predictions can be examined by direct comparisons of model test results with the corresponding prototype behavior. The achievement of the study can be summarized in the following three points.1. An extensive review of published data in foundation engineering fields was made regarding the modeling of models and the direct comparisons between the prototype behavior and corresponding centrifuge model tests. The results revealed that the centrifuge modeling provides useful and practical information as long as the ratio of particle diameter to foundation length is less than 100. In the modeling of deep foundation, appropriate modeling of construction sequence is of vital importance.2. A series of centrifuge tests for direct comparison were carried out. Prototype loading tests were conducted on a sedimented sandy soil and block samples obtains from the site wereused for centrifuge tests. The results showed that the centrifuge tests underpredict yield load by 15% and overpredict settlement at yield load by a factor of 2to 3.3. An effort was made for the development of mini-drum type centrifuge for possible use of small size undisturbed block sample to conduct direct modeling.

通过直接比较模型测试结果与相应的原型行为的直接比较，可以检查带有比例模型的离心机测试对实践预测的适用性。该研究的成就可以在以下三个点中总结。1。关于模型建模以及原型行为与相应离心机模型测试之间的直接比较，对基础工程领域的已发表数据进行了广泛的综述。结果表明，只要颗粒直径与基础长度的比率小于100。在深层基础的建模中，适当的构造顺序建模至关重要。2。进行了一系列直接比较的离心测试。在沉积的沙质土壤上进行了原型载荷测试，并从该地点获得的块样品被用于离心测试。结果表明，离心测试将收益率负载低于15％，而在产量负载下预测过度预测的定居点为2至3.3倍。为开发微型烟气类型离心机而努力，以便使用不受干扰的块样品进行直接建模。

项目成果

O.Kusakabe et al: "Design of a Mini Drum Centrifuge and a Few Applications (under review)" Journal of Geotechnical Engineering JSCE.

O.Kusakabe 等人：“微型转鼓离心机的设计和一些应用（正在审查中）”岩土工程杂志 JSCE。

O.Kusakabe: "Applications of Centrifuge Modeling to Foundation Engineering" Ground Engineering. Vol. 11. 1-10 (1993)

O.Kusakabe：“离心机建模在基础工程中的应用” 地面工程。

日下部 治: "基礎工に関する遠心実験の利用と適用性" 地盤と建設. 11. 1-10 (1993)

Osamu Kusakabe：“基础工程中离心实验的使用和适用性”岩土工程。11. 1-10 (1993)。

Osamu KUSAKABE: "Geotechnical Centrifuge Technology" N.R.Taylor編, (1994)

Osamu KUSAKABE：“岩土离心机技术”，N.R.Taylor 编辑，(1994)

日下部 治: "Mini-drum遠心装置の設計と利用" 土木学会論文集. (投稿中).

Osamu Kusakabe：“小型转鼓离心设备的设计和使用”日本土木工程师学会会议论文集（目前正在提交）。