Evaluation of The Effective Rainfall Consideing Slope Factors

考虑坡度因素的有效降雨量评估

• 批准号: 07555446
• 负责人: UNO Takao
• 金额: $ 0.26万
• 依托单位: GIFU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555446/
• 关键词: Slope; Rainfall; LOGIT Model; Probability of Falure; Effective Rainfall; 斜面安定; 連続雨量; 時間雨量; 斜面要因

For evaluation of the effective rainfall considering the slope factors, uni-factor such as hourly rainfall, continuous rainfall or efficient rainfall is examined as the criterion to judge possibility of slope failure in 1975, and combination of two-factors were also used for that same possibility second year 1996, and following results are obtained.(1) (Slope factor model) By means of applying Logit model to slope failure, resistance potential of slope against failure can be expressed as a criterion containing the slope conditions like angle, existence of countermeasure and constituent soils of slope, etc.(2) (Rainfall factor model) The probability of slope failure expressed by logit model using the ratio of resistance potential to rainfall factor (each of above three kinds of rainfall) is fairly effective to judge the possibility of slope failure.(3) The index of judging rainfall factors (combination of hourly rainfall and efficient rainfall) is best way to discriminate whether or not slope fails. To realize this, the graph with the abcissa, hourly rainfall intensity, and the ordinate, efficient rainfall, is drawn, in which we get a boundary line (LM-line) to judge whether or not slope fails.(4) The characteristics of LM-line (slope and cutting ordinate) represents a magnitude of above resistance potential. It becomes clear that for the slope of very strong resistance, efficient raifall is greater effect on the stability than hourly rainfall, and for the slope of weak one, hourly rainfall have greater effect than efficient rainfall.Accordingly, the criterion that discreminates between stable slope from dangerous one, is expressed by the slope factor model, rainfall factor model and combination of hourly/efficient rainfall.

在考虑边坡因素的有效降雨量评价中，1975年采用单因素，如小时降雨量、连续降雨量或有效降雨量作为判断边坡破坏可能性的标准，1996年又采用两个因素的组合作为判断边坡破坏可能性的标准，得到以下结果。(1)（边坡因子模型）将Logit模型应用于边坡破坏，可将边坡的抗破坏潜力表示为一个包含边坡角度、是否存在防护措施、边坡组成土等条件的判据。(2)（降雨因子模型）用阻力势与降雨因子（以上三种降雨中的每一种）的比值，用logit模型表示边坡失稳的概率，对判断边坡失稳的可能性是比较有效的。(3)降雨因子判别指标（小时降雨量和有效降雨量的组合）是判别边坡失稳的最佳方法。为了实现这一点，我们画出了一个图表的abcissa，每小时的降雨强度，和纵坐标，有效降雨量，我们得到了一个边界线（LM线），以判断是否边坡失败。(4)LM线的特征（斜率和切割纵坐标）代表上述电阻电位的大小。研究表明，对于阻力很强的边坡，有效降雨量对边坡稳定性的影响大于小时降雨量，而对于阻力较弱的边坡，小时降雨量对边坡稳定性的影响大于有效降雨量，据此，提出了边坡稳定性与危险性的判别准则，即边坡系数模型、降雨系数模型和小时降雨量/有效降雨量的组合。

项目成果

T.Sugii, K.Yamada and T.Uno: "Evaluation of hourly rainfall and effective rainfall for slope stability (in Japanese)" Proc.of the 32th Japan National Conf.on Geotechnical Engineering. 2 (1997)

T.Sugii、K.Yamada 和 T.Uno：“每小时降雨量和有效降雨量对边坡稳定性的评估（日语）”第 32 届日本全国岩土工程会议论文集。

Proc.of '97JSCE Conference on Safety, Note : JSCE.=Japan Society of Civil Engineers.27-32 (1997)

Proc.of 97JSCE 安全会议，注：JSCE.=日本土木工程师学会.27-32 (1997)

杉井俊夫: "崩壊確率を用いた斜面の有効雨量の評価" 土木学会第51回年次学術講演会概要集. IIII(発表予定). (1996)

Toshio Sugii：“利用失效概率评估斜坡上的有效降雨量”日本土木工程师学会第 51 届年度学术会议摘要集（待提交）。

杉井俊夫: "崩壊確率を用いた斜面の有効雨量の評価" 土木学会第51回年次学術講演会概要集. 第3部(A). 416-417 (1996)

Toshio Sugii：“使用失效概率评估斜坡上的有效降雨量”日本土木工程师学会第 51 届年度学术会议摘要第 3 部分（A）（1996 年）。

杉井俊夫: "斜面要因にみあう有効雨量の算定" 地盤工学会「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」論文集. (1997)

杉井俊夫：“根据坡度系数计算有效降雨量”日本岩土工程学会论文集“保护危险斜坡免受降雨和地震影响的岩土工程研讨会”（1997 年）