Prediction of the earthquake-induced landslide distribution and prevention of the secondary hazards

地震滑坡分布预测及次生灾害防治

• 批准号: 08558041
• 负责人: TAKAHASHI Tamotsu
• 金额: $ 7.74万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08558041/
• 关键词: Slope failure; Earthquake; Ground water; Acceleration distribution; Liquefaction; Shaking table; 地震加速度; 地下水面; シミュレーション; 二次災害; 増幅; 震動実験

Aiming at development of the methods to predict the distribution of the earthquake-induced landslides and to assess the possibility of onset of secondary hazards due to debris flows that caused by the landslides the following investigations have been carried out.1.Distribution and number of the landslides triggered by the Kobe earthquake were compared with the other landslides due to heavy rainfall and the role of the ground water was made clear.2.Modeling the process of destruction of the seismic fault as the combination of small earthquakes, the distribution of the maximum ground motion was simply obtained.3.Distributions of the acceleration, pore-water pressure and the sliding surface within the soil layer were obtained by the experiments using a large-scale shaking table. The process of failure was analyzed by a finite element method.4.The underground radar system was proved to be a handy acqusition system for the distribution of the thicknesses of the surface soil layer that has potential to fail.5.Sediment deposit on the gully bottom produced by the landslide may cause the secondary hazards due to onset of debris flow. The method to assess such a possibility was given and applied to the Kobe earthquake case.6.Liquefaction process of an earth block to a debris flow was analyzed by a mathematical model and it was checked by the laboratory experiments.

为建立地震滑坡分布预测方法，评估滑坡引发的泥石流次生灾害发生的可能性，开展了以下研究工作。 1、地震滑坡分布及数量将神户地震引发的滑坡与其他强降雨引发的滑坡进行了比较，明确了地下水的作用。2.将地震断层破坏过程模拟为小地震的组合， 3.通过大型振动台试验，得到了土层内加速度、孔隙水压力和滑动面的分布。采用有限元方法分析了失效过程。4.地下雷达系统被证明是一种方便的采集系统，可用于获取可能失效的表层土层的厚度分布。5.沟渠沉积物沉积滑坡产生的底部可能会因泥石流发生而造成次生灾害。给出了评估这种可能性的方法，并将其应用到神户地震实例中。6.通过数学模型分析了土块液化过程，并通过室内实验进行了验证。

项目成果

高橋 保 他: "地震外力を考慮した斜面崩壊に関する実験的研究" 京都大学防災研究所年報. 40B-2. 385-396 (1997)

Tamotsu Takahashi 等：“考虑外部地震力的边坡破坏实验研究”，京都大学防灾研究所年度报告 40B-2 385-396（1997）。

高橋保・中川一・里深好文 他: "地震外力を考慮した斜面崩壊に関する実験的研究" 京都大学防災研究所年報. 40B-2. 385-396 (1997)

Tamots Takahashi、Hajime Nakakawa、Yoshifumi Satobuka 等：“考虑外部地震力的边坡破坏实验研究”，京都大学防灾研究所年报 40B-2 (1997)。

Takashi, T., Nakagawa, H., Satofuka, Y. et al.: "An experimental study on the slope failure under the seismic force"Annuals, Disaster Prevention Research Institute. 40B-2. 385-396 (1997)

Takashi, T.、Nakakawa, H.、Satofuka, Y.等：“地震力作用下边坡破坏的实验研究”年鉴，防灾研究所。

高橋保・中川一・里深好文他: "地震外力を考慮した斜面崩壊に関する実験的研究"京都大学防災研究所年報. 40B-2. 385-396 (1997)

Tamots Takahashi、Hajime Nakakawa、Yoshifumi Satobuka 等：“考虑外部地震力的边坡破坏实验研究”，京都大学防灾研究所年报 40B-2 (1997)。

中川 一 他: "鹿児島県出水市針原川で発生した土石流の再現計算の試み" 突発災害調査報告書. (1998)

中川肇等人：“尝试再现鹿儿岛县和泉市张原河发生的泥石流”意外灾害调查报告（1998）。