Study of the Corrosion Characteristics of Tunnel Fissures in a Karst Area in Southwest China
作者： Yanjie Zhao , Fugang Wang , Cangsong Li , Yuqing Cao , Hailong Tian
DOI: 10.1155/2018/6234932
关键词:
摘要: The development of the fissures in soluble rock karst areas directly affects construction and operation safety tunnel engineering. It is thus theoretical practical significance to study characteristics its corrosion influencing factors. Taking Wulong as research object, numerical model area was established quantitatively analyze range, ratio, changes permeability porosity over past 100 years, simulation results were verified by field experiments. show that main controlling factor fissure flow rate. range ratio tunnels increased with temperature because reaction rate constant temperature, causing reactions’ equilibrium move towards direction solution. larger initial fissures, faster corrode. In same time period, high large will lead being more enhanced, exhibit secondary enhancement effects. opening dead-end pores greatly enhanced slightly porosity, which caused differential area. protection should be strengthened, mainly strong hydrodynamic conditions fracture zone.
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