渗流作用下山区填方路基失稳的突变机理研究  

Study on Catastrophic Model with Cusp Point of Subgrade with Seepage Flow

作　　者：柴贺军[1,2] CHAI Hejun

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]山区道路工程与防灾减灾技术国家地方联合工程实验室,重庆400067

出　　处：《公路交通技术》2018年第6期1-4,共4页Technology of Highway and Transport

基　　金：国家科技支撑计划项目(2015BAK09B00)

摘　　要：对山区公路填方路基失稳研究中发现,某些填方路基在地下水的作用下其变形失稳具有突发性特点。通过研究路基土体微结构系统能量的变化,建立了路基失稳的尖点突变模型,得出了某类路基失稳是由于路基中浸润线的变化而导致的,并导出了路基失稳时浸润线的临界值,为路基破坏失稳机理、稳定性分析和治理提供了依据。Study shows that the breaching of subgrade has the catastrophic characteristic in the effect of groundwater.On the basis of catastrophic theory,through studying the energy changes of subgrade soil microstructure system,a catastrophic model with cusp point for subgrade is established.It is concluded that the instability of a certain type of subgrade is caused by the change of the saturation line in the subgrade,and the critical value of the saturation line causing subgrade breaching is derived in the paper,which provides a basis for the subgrade breaching mechanism,stability analysis and treatment of the subgrade.

关 键 词：填方路基 地下水 突变模型 尖点 渗流 

分 类 号：U416[交通运输工程—道路与铁道工程]