摘要
为了研究黄土地区地质结构与公路边坡稳定性、排水防护措施的关系,首先介绍了地质结构模型的概念、划分依据及其主要特征,然后将黄土地区复杂的地质结构划分为8种模型;在给定坡高和坡型、有无大平台的情况下,通过有限元模拟对比了各种模型的稳定性变化特性,给出是否采用大平台设计高边坡坡型的建议,明确了各类地质结构模型稳定性的差异;推荐了地质结构模型与边坡稳定性分析相结合的公路高边坡设计思路和适用的边坡防排水方案。结果表明:地质结构模型对边坡稳定性具有明显影响;Ⅰ、Ⅱ、Ⅲ类模型必须设置大平台,其余模型可不设置。
In order to study the relationship of geologic structure, highway slope stability and water proof drainage measure in loess region, firstly, the concepts, dividing rules and main characteristics of the geologic structure model were all described. Then, 8 kinds of geologic structure models were defined in loess area. Based on the given kinds of slope shapes, slope heights and wide flat roof, the stability variety characteristics of all models were simulated by finite element. The advice of the slope shape design with wide flat roof or not was put forward, and the differences of highway slope stability among the models were also analyzed. Furthermore, the new design thoughts of highway loess slope which took the geologic structure model and the analysis of slope stability into account and the design of water-proof drainage for slope were recommended. Results show that influence of geologic structure model on slope stability is obviously. Mode Ⅰ、Ⅱ, m must install wide flat roof, other models needn＇t install it.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2007年第5期1-6,共6页
China Journal of Highway and Transport
基金
国家自然科学基金项目(40471023)
国家西部交通建设科技项目(200131800020)
关键词
道路工程
地质结构模型
理论分析
黄土边坡
稳定性
road engineering
geologic structure model
theoretical analysis
loess slope
stability
