The Key Technologies for Durable Construction of Tunnel

Research purposes:Nowadays the more attention is paid to the carrying capacity of concrete structure in tunnel construction while less attention is paid to the impact on the concrete durability by worsening materials property caused by environment effects.If the concrete durability is inadequate,it will not only increase the maintenance cost and impact the normal service of tunnel,but also will shorten the service life,resulting in serious waste of resources,so the more attention should be paid to the concrete durability in tunnel construction in the future. Research results:The rational matching ratio of concrete,high quality raw materials,reliable control of construction quality(such as mixture,transportation,pouring and tamping) and rational maintenance of concrete are the main factors for guaranteeing the durability of concrete,and they are also the key technologies for durable construction of tunnel.