摘要
降雨入渗会降低其影响范围内土体中基质吸力,引起土体软化,强度参数降低,对隧道稳定性产生较大影响。采用有限差分软件FLAC3D对隧道的降雨入渗过程进行模拟,研究降雨影响深度以及降雨对土体软化效应的影响,并与顶部产生积水坑的工况进行比较。研究结果表明,降雨入渗较大程度地减小了非饱和区基质吸力以及土体强度参数;考虑顶部形成积水坑后,降雨入渗深度显著增大,非饱和区基质吸力及土体强度参数减小明显,隧道不稳定性显著增加。
Using the finite difference software FLAC3 D, this paper simulated the rainfall infiltration process of the tunnel, and studied the rainfall influence depth and the influence of the rainfall on soil softening effect, and also compared the working condition of water pit on the top. Through the experiment study, it drew a conclusion that the rainfall infiltration could reduce the maximum suction in soils within its influence scope, which caused the soil softening and reduced the strength parameters and had a great influence on the tunnel stability.
出处
《山西交通科技》
2016年第2期83-85,共3页
Shanxi Science & Technology of Transportation
关键词
降雨入渗
隧道
影响深度
土体软化
数值分析
rainfall infiltration
tunnel
influence depth
soil softening
numerical analysis
