Suggested Method to Predict Catastrophic Landslides

预测灾难性山体滑坡的建议方法

• 批准号: 06044119
• 负责人: SASSA Kyoji
• 金额: $ 6.21万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06044119/
• 关键词: Catastrophic Landslides; Prediction; Assessment; Hazard Map

1994(1) Investigators and joint researchers from Canada, U.K., New Zealand, Sri Lanka, and China held a joint research meeting for two weeks in Kyoto, and made a joint field investigation in Mt.Mayu Landslide area, Nagasaki Prefecture, Japan.1995(2) Sassa and Fukuoka investigated Frank Slide, Canada with Evans of Geological Survey of Canada. Terrace soils were sampled from where the slide ran away and brought to Japan. They carried out undrained loading ring shear tests for predicition of landslide movement with the sample and found that the apparent friction angle was only 3.8 degrees, which could explain its longrunout. Evans found sheared layr beneath the deposited mass of the Frank Slide by boring.(3) Sassa, Fukuoka and Evans jointly investigated the Nikawa landslide, Nishinomiya, Japan which was triggered by the 17 January 1995 Hyogoken-Nambu earthquake. They sampled soils there and carried out undrained cyclic loading ring shear tests. Results showed "sliding surface liquefaction" occurred due to destruction of soil structure and grain crushing. This phenomenon reduced the shear strength rapidly and dramatically and could explain the rapid landslide motion.(4) Investigators and joint researchers from Canada, U.K., New Zealand, United States, and Italy gathered at Kyoto University and held a joint research meeting for two weeks, and discussed on the practical method of landslide prediction and assessment.1996(5) Sassa Fukuoka carried out field investigation of the 6 December 1996 Gamaharazawa Debris Flow Disaster. They sampled torrent deposits from the nearest stream. Undrained ring shear tests on the sample revealed that the sliding surface liquefaction occurred and initiated high speed shearing, which could explain the landslide triggered debris flow mechanism. Sassa discussed the results with Investigators and joint researchers form United States and Canada at the occasion of IUGS (International Union of Geological Sciences) meeting.

1994年（1）来自加拿大、英国、新西兰、斯里兰卡和中国在京都举行了为期两周的联合研究会议，并在日本长崎县的马郁山滑坡区进行了联合实地调查。1995（2）Sassa和Fukuoka与加拿大地质调查局的Evans一起对加拿大的Frank Slide进行了调查。梯田土壤取样从那里的幻灯片逃跑，并带到日本。他们对该样品进行了不排水加载环剪切试验，以预测滑坡运动，发现表观摩擦角仅为3.8度，这可以解释其长期运行。埃文斯通过钻孔在弗兰克滑坡的堆积物下面发现了剪切层。(3)Sassa、Fukuoka和Evans联合调查了1995年1月17日日本兵库县南部地震引发的西宫的Nikawa滑坡。他们在那里取样，进行不排水循环加载环剪试验。结果表明，滑面液化是由于土体结构破坏和颗粒破碎造成的。这一现象可以解释滑坡体的快速运动。(4)来自加拿大，英国，新西兰、美国和意大利在京都大学召开了为期两周的联合研究会议，讨论了滑坡预测和评估的实用方法。1996（5）福冈县佐对1996年12月6日的甘原泽泥石流灾害进行了实地调查。他们从最近的溪流中采集了激流沉积物的样本。不排水环剪试验结果表明，滑面发生液化并引发高速剪切，这可以解释滑坡触发泥石流的机制。Sassa在IUGS（国际地质科学联合会）会议上与美国和加拿大的调查人员和联合研究人员讨论了结果。

项目成果

H.Fukuoka, K.Sassa, Yang Q.J., Song B.E.: "Extensometer Observation by the Lishan Landslide Prevention Observatory, Xian, China" Landslide News. 10 (in print). (1997)

H.Fukuoka、K.Sassa、Yang Q.J.、Song B.E.：“中国西安历山滑坡防治观测站的引伸计观测”滑坡新闻。

K.Sassa,H.Fukuoka Wang F.W.: "Gamahara Torrent Debris Flow on 6 December 1996,Japan(2)Possible Mechanism of the Debris Flow" Landslide News. 10(印刷中). (1997)

K.Sassa，H.Fukuoka Wang F.W.：“1996 年 12 月 6 日的伽玛原山洪流泥石流，日本（2）泥石流的可能机制”山体滑坡新闻 10（出版中）。

K.Sassa, Editor: Elsevier (in edition). Engineering Geology, Special Volume for International Symposium on Prediction of Rapid Landslide Motion, (1997)

K.Sassa，编辑：Elsevier（正在版中）。

K.Sassa, Editor: Proc.XX IUFRO World Congress, Technical Session S1.04 on Natural Disasters in Mountainous Areas, Tanpere, 241 (1995)

K.Sassa，编辑：Proc.XX IUFRO 世界大会，关于山区自然灾害的技术会议 S1.04，坦佩雷，241 (1995)

K.Sassa,Editor: "Engineering Geology,Special Volumo for Intl.Symposium on Prediction of Rapid Landslide Motion" Elsevier, (1997)

K.Sassa，编辑：“工程地质学，国际快速滑坡运动预测研讨会特别卷”Elsevier，（1997）