摘要
基于路堑边坡风险评估及管理技术框架,以龙岩市永定大道K0+855～K1+085路堑边坡为例,开展边坡定量风险评估,对边坡开挖及加固两个典型工况的边坡破坏概率、灾害到达承灾体概率、承灾体时空概率、承灾体易损性、承灾体财产价值等关键参量进行分析及计算,从而实现了上述两个工况边坡潜在风险损失的定量估算和比较,验证了边坡加固工程实施的必要性和有效性。因公路拓宽方案变更需求,对该边坡提出多级锚固和抗滑桩两种优化设计方案,并同样实施了这两个方案的定量风险评估及对比分析,研究表明在边坡设计安全系数基本相当的条件下,多级锚固方案具有较低的破坏概率和较少的潜在财产损失,为优选变更方案。本文研究提出了一套完整的边坡定量风险评估技术方案,并例证了该技术方案可以在设计阶段预测边坡风险状态及估算潜在风险损失,体现了风险防控对策的科学性和前瞻性,实现从源头控制风险的目标。
Based on the technical framework of risk assessment and management of cutting slopes,the quantitative risk assessment of Longyan Yongding Avenue k0+855~k1+085 cutting slope was conducted in this study.The key parameters,such as the probabilities of slope failure,and disaster reaching disasterbearing body,and the space-time probability,vulnerability and property value of the disaster-bearing body,were analyzed and calculated under the two typical working-conditions of slope excavation and reinforcement for the purpose of quantitative estimation and comparison of the potential slope risk-loss.It realized that reinforcement projects for slopes are necessary and effective.Due to the widening of the highway,the multistage anchorage and anti-slide pile schemes were proposed,as well as quantitative risk assessment and comparative analysis of these two schemes.The study shows that the multilevel anchorage scheme is the best alternative,since it has lower failure probability and less potential property loss under the condition of same design slope safety-factor.This study puts forward a complete technical scheme of slope quantitative risk assessment which can estimate the slope risk state and potential risk loss in the designing stage,embodying the scientific and forward-looking of risk control countermeasure for the purpose of controlling risk from the source.
作者
林阿娜
王浩
颜斌
戴旭明
胡燮
赵小盘
王晨
LIN A’na;WANG Hao;YAN Bin;DAI Xuming;HU Xie;ZHAO Xiaopan;WANG Chen(College of Environment and Resources,Fuzhou University,Fuzhou,Fujian 350116,China;Geological Engineering Research Center,Fujian Provincial University,Fuzhou,Fujian 350116,China;China Energy Engineering Group Guangdong Electric Power Design Institute Co.Ltd,Guangzhou,Guangdong 510663,China;Power Transmission Management Institute of Shenzhen Power Supply Bureau Co.Ltd,Shenzhen,Guangdong 518020,China)
出处
《中国地质灾害与防治学报》
CSCD
2019年第2期19-29,共11页
The Chinese Journal of Geological Hazard and Control
基金
福建省自然科学基金(2018J01746)
南网科技项目(090000KK52160020)
国网科技项目(XY-2018F03-2-84)
关键词
路堑边坡
定量风险评估
风险管理
输电塔
cutting slope
quantitative risk assessment
risk management
transmission tower
