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Failure Behavior of Soil Structures by Centrifuge Model Test

土结构破坏行为的离心模型试验

基本信息

批准号：
63420049
负责人：
HASEGAWA Takashi
金额：
$ 19.65万
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 (A)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

Using the centrifuge apparatus, we study the deformation behavior of model clay ground due to self-weight consolidation and the behavior of model soil structures leading to failure. As a result, The following results are obtained.1. Self-Weight Consolidation Test of Soft ClayCentrifuge self-weight consolidation tests are conducted to evaluate the behavior of deformation and excess pore pressure for a soft reclamation ground and sea-bed depoint, which is affected by self-weight and varying layer depth. Kaolin clay prepared with water content of 135-200% is used for consolidation by applying 50g centrifugal acceleration in the single drained condition. The measured results of settlement at the surface and excess pore pressure at the bottom are shown to agree with the analytical results of the differential equation for self-weight consolidation proposed by Mikasa.2. Failure Test of Model Layered SlopesThe centrifuge model test and a stability analysis based on the variational approach are … More employed to investigate the failure characteristics of the slope. From the homogeneous models, we show how the material strength is mobilized on the slip surface by back analysis of the observed results. From the experiments of a compacted sand slope which sandwiches a clay layer, we make clear the failure characteristics affected by the way how the clay layer is deep, inclined and where it is located, and those are mostly simulated well by a simple stability analysis.3. Partially Drained Behavior of Saturated Clay FoundationUsing the centrifuge apparatus, a model clay foundation is locally applied by air pressure or water pressure to examine the strength characteristics mobilized by the different applying speed and the different stiffness of the foundation.4. Back analysis of Parameters and Plane Strain Element Test of SoilBack analysis is applied to identify the parameters necessary for the numerical analyses. The Plane strain element test is conducted to understand the deformation and strength characteristics of soil elements. Less

利用离心试验装置研究了模型粘土地基的自重固结变形特性和模型土结构的破坏特性。结果表明：1.软土自重固结试验通过离心自重固结试验，评价软土围垦地基和海底沉积物在自重和层深变化的影响下的变形和超静孔隙水压力特性。采用含水量为135-200%的高岭土，在单次排水条件下施加50 g离心加速固结。地表沉降和底部超静孔压的实测结果与Mikasa提出的自重固结微分方程的解析结果吻合较好.层状边坡模型破坏试验本文介绍了离心模型试验和基于变分法的稳定性分析。 ...更多信息研究边坡的破坏特征。从均匀模型，我们显示了如何动员的材料强度上的滑动面的观测结果的反分析。通过一个夹有粘土层的压实砂土边坡的试验，明确了粘土层的埋深、倾斜度和位置对边坡破坏特征的影响，并通过简单的稳定性分析得到了较好的模拟.饱和粘土地基的局部排水特性利用离心试验装置，对模型粘土地基局部施加气压或水压，研究不同施加速度和不同地基刚度对地基强度的影响.参数反分析与土的平面应变元试验反分析用于确定数值分析所需的参数。通过平面应变单元试验，了解土单元的变形和强度特性。少