摘要
降雨是导致边坡失稳的主要诱因之一,如何对建筑边坡稳定性的降雨阈值进行确定尤其重要。首先引入云模型的评价方法建立建筑边坡稳定性评价体系。该评价体系综合考虑边坡岩土体的主要地质特征以及降雨历时、降雨强度和前期降雨量等因素,并采用改进的熵权层次分析法得到各评价指标的权重。其次,根据评价体系对不同降雨工况下的边坡稳定性评价,得出边坡基本稳定—欠稳定以及欠稳定—不稳定的降雨阈值方程。最后将该降雨阈值方程应用于分析福建省南平市金龙花园小区边坡2010年6月13日至2010年6月18日降雨期间的稳定状态。分析结果中有5天的与边坡实际情况相吻合,仅有6月15日的分析结果与实际情况有所偏差。结果表明该方法具有较好的可靠性和实用性。
Rainfall is one of the main causes of slope instability.How to determine the rainfall threshold of building slope stability is particularly important.Firstly,the evaluation method of cloud model was introduced to establish the evaluation system of slope stability.The main geological characteristics of slope,rainfall duration,rainfall intensity and early rainfall are taken into consideration in the evaluation system,the improved entropy weight analytic hierarchy process is adopted to obtain the weight of each evaluation index.Secondly,according to the slope stability under different rainfall conditions,the rainfall threshold equations for slope stability from basic stability to under stability and to instability were obtained.Finally,the rainfall threshold equation was applied to analyze the stable state of the slope in Jinlong Garden District from June 13,2010 to June 18,2010 in Nanping City,Fujian Province.The results of the analysis were consistent with the actual situation of the slope for 5 days,and only the results of the analysis on June 15 deviated from the actual situation.It is shows that the method is reliable and practical.
作者
陈忠源
戴自航
CHEN Zhongyuan;DAI Zihang(Fuzhou University, Fuzhou, Fujian 350116, China;Fuzhou University of International Studies and Trade, Fuzhou, Fujian 350202, China)
出处
《中国地质灾害与防治学报》
CSCD
2020年第2期50-56,共7页
The Chinese Journal of Geological Hazard and Control
基金
福建省高校杰出青年科研人才培育计划资助项目(2018142)。
关键词
云模型
建筑边坡
降雨历时
降雨强度
前期降雨量
cloud model
building slope
rainfall duration
rainfall intensity
early rainfall
