Fundamental Research on Establishment of Predication System for Faikure of Shirasu Slope

Shirasu斜坡故障预测系统建立的基础研究

• 批准号: 09555153
• 负责人: KITAMURA Ryosuke
• 金额: $ 6.59万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555153/
• 关键词: Shirasu Slope; Unsaturated Soil; Suction; Tensiometer; Field Measurement; Remote Control; Cellular Phone; Numerical &Mechanical Model; 不飽和透水試験; 遠隔装置; 不飽和透水係数; 崩壊告知

The research results are summarized as follows.・The flow chart for research strategy was proposed to predict Shirasu slope failure in real time. It was shown in the flow chart that the research items such as ground survey, laboratory soil test, numerical simulation, etc. are organically related each other. The slope stability can be estimated in real time according to the proposed flow chart when all the research items are solved.・The field measuring system was established for the rainfall and suction in unsaturated soil. In the latest system the cellular phone was used to transmit the data filed in the data-logger to the personal computer in the laboratory. It was found out from obtained data that seepage characteristics of rainwater into unsaturated ground depend on the ground structure and rainfall pattern.・The soil testing apparatus for unsaturated permeability was made and the accurate unsaturated permeability coefficient and water retention curve were obtained by this apparatus.・The proposed numerical & mechanical models can quantitatively simulate The seepage behavior of rainwater into unsaturated soil well.・The decrease in apparent cohesion due to the decrease in suction with the increase of water content was investigated and the relations between the apparent cohesion, suction and water content were theoretically derived.

研究结果总结如下。 ・提出了实时预测Shirasu边坡破坏的研究策略流程图。从流程图中可以看出，地面调查、室内土壤试验、数值模拟等研究项目是有机联系的。当所有研究项目都解决后，可以根据所提出的流程图实时估计边坡稳定性。 ・建立了非饱和土中降雨和吸力的现场测量系统。在最新的系统中，蜂窝电话用于将数据记录器中归档的数据传输到实验室的个人计算机。从获得的数据中发现，雨水进入非饱和土壤的渗流特性取决于土壤结构和降雨模式。・制作了土壤非饱和渗透性测试装置，并通过该装置获得了准确的非饱和渗透系数和保水曲线。・所提出的数值和力学模型可以很好地定量模拟雨水进入非饱和土壤的渗流行为。・ 研究了由于吸力随着含水量的增加而降低而导致的表观粘聚力的降低，并从理论上推导了表观粘聚力、吸力和含水量之间的关系。

项目成果

米森義辰、土田充義他: "湖南省新晃県トン族とその周辺の少数民族の住居平面に関する研究(アジア文化圏の民家と集住形態に関する研究20)"日本建築学会九州支部研究報告. 第38号. 477-480 (1999)

米森义龙、土田光吉等：《湖南省新晃县侗族及周边少数民族住房规划研究（亚洲文化区私人住宅及聚落形式研究20）》日本建筑学会九州分院研究报告第 38 号。477-480 (1999)

R. Kitamura, G.Kisanuki, S. Fukuhara and K. Uemura: "Failure modes of slope due to decrease in cohesion of soil"Int. Sympo. On Deformation and Progressive Failure in Geomechanics (IS-NAGOYA'97). 713-718 (1997)

R. Kitamura、G.Kisanuki、S. Fukuhara 和 K. Uemura：“由于土壤粘聚力降低而导致的斜坡破坏模式”Int。

R.Kitamura et al.: "Failure modes of slope due to decrease in cohesion of soil" IS-Vagoya'97. 713-718 (1997)

R.Kitamura 等人：“由于土壤粘聚力降低而导致的斜坡破坏模式”IS-Vagoya97。

北村,山田: "粘着成分を考慮したしらす斜面の安定解析" 「降雨と地震から危険斜面を守る地盤工学に関するシンポジウム」発表論文集. 77-80 (1997)

Kitamura，Yamada：“考虑粘合剂成分的银鱼斜坡稳定性分析”“保护危险斜坡免受降雨和地震影响的岩土工程研讨会”论文集77-80（1997年）

R.Kitamura,K.Sako and M.Yamada: "Relationship between suction and apparent cohesion and its application to slope stability analysis"Asian Conference on Unsaturated Soils(Unsat-Asia2000),2000.5. (発表予定).

R.Kitamura、K.Sako 和 M.Yamada：“吸力与表观粘聚力之间的关系及其在边坡稳定性分析中的应用”，亚洲非饱和土会议（Unsat-Asia2000），2000.5（待提交）。