Experimental studies on collapse prediction of Shirasu slopes in consideration of the variation of shearing resistance and infiltration flow caused by various rainfalls

考虑不同降雨引起的抗剪力和入渗流量变化的Shirasu边坡崩塌预测试验研究

• 批准号: 06650553
• 负责人: OKABAYASHI Takumi
• 金额: $ 1.09万
• 依托单位: KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650553/
• 关键词: Shirasu; In-situ permeability tests; Double-ring infiltrometer; Stress path; Cyclic triaxial test; Liquefaction; Volcanic soil; Shear stress ratio; 降雨; 斜面; ハザードマップ; 水分特性; 三軸圧縮; 判別分類

1.In-situ tests for measuring unsaturated permeability of "shirasu" are carried out by means of two methods. The first is the method that measures the variation of infiltration rates from the double-ring infiltrometer. The other is one that does the variation of water depth in the recharging holes.2.A series of undrained cyclec and monotonic triaxial tests has been performed on a volcanic soil "shirasu" which has crushable particles. Testing was performed on loose and dense specimens and the results were compared with those of Toyoura sand.3.The undrained cyclic and monotonic shear behavior of "shirasu" is found to be greatly dependent on the confining pressure and its density.The undrained cyclic shear stress ratio to cause failure increases in loose specimen while it decreases in dense specimen with increasing confining pressure.

1.采用两种方法进行了“shirasu”非饱和渗透率的原位测试。第一种方法是用双环入渗仪测量入渗速率的变化。2.对含有可压碎颗粒的火山土“shirasu”进行了一系列不排水循环和单调三轴试验。3.“shirasu”的不排水循环单调剪切特性与围压和密度有很大的关系，随着围压的增加，引起破坏的不排水循环剪应力比在松散试样中增大，而在密实试样中减小。

项目成果

岡林巧・兵動正幸・村田秀一: "乱さないしらすの非排水単調せん断挙動" 土木学会第50回年次学術講演会講演概要集. 3. 342-343 (1995)

Takumi Okabayashi、Masayuki Hyodo、Shuichi Murata：“银鱼无扰动的不排水单调剪切行为”日本土木工程学会第 50 届年会学术会议摘要 3. 342-343 (1995)。

Takumi OKABAYASHI,Masayuki HYODO,Noriyuki YASUFUKU,Hidekazu MURATA: "Monotonic and cyclic undrained shear behavior of volcanic soil "Shidrsu"" Proceedings of JSCE. No.499/III-28. 97-106 (1994)

Takumi OKABAYASHI、Masayuki HYODO、Noriyuki YASUFUKU、Hidekazu MURATA：“火山土“Shidrsu”的单调和循环不排水剪切行为”JSCE 论文集。

海老原賢次,内谷保,岡林巧,杉尾哲,他: "降雨データを用いた判別分析によるしらす斜面崩壊予知" 土木学会西部支部研究発表会講演概要集. 386-387 (1995)

Kenji Ebihara、Tamotsu Uchiya、Takumi Okabayashi、Satoshi Sugio 等：《利用降雨数据进行判别分析预测 Shirasu 边坡破坏》日本土木工程学会西部分会研究会议演讲摘要集 386-387。 (1995)

岡林巧、兵動正幸、安福規之、村田秀一: "乱した一次しらすの非排水単調および繰返しせん断挙動" 土木学会論文集. No. 499 III-28. 97-106 (1994)

Takumi Okabayashi、Masayuki Hyodo、Noriyuki Yasufuku、Shuichi Murata：“受干扰的初级银鱼的不排水单调和循环剪切行为”，日本土木工程师学会会刊第 499 III-28 号（1994 年）。

岡林巧、兵動正幸、安福規之、村田秀一: "乱した一次しらすの非排水単調および繰返しせん断挙動" 土木学会論文集. No.499 III-28. 97-106 (1994)

Takumi Okabayashi、Masayuki Hyodo、Noriyuki Yasufuku、Shuichi Murata：“受干扰的初级银鱼的不排水单调和循环剪切行为”，日本土木工程师学会会刊第 499 III-28 号（1994 年）。