May Day”During the festival，All builders of Lexi Expressway stick to their posts，Grasp the progress，Set off an upsurge of engineering construction，Present a Gift to Labor Day with Practical Actions。May 1，Lexi Expressway（Leshan-Mabian Section）The longest tunnel—Taoyan Tunnel（Right hole）Smooth penetration，It marks a phased breakthrough in project construction.，It laid a solid foundation for the opening of the whole line.。

Taoyan Tunnel is located in Lidian Town, Muchuan County, Leshan City.，The total length is 2256 meters，It is also the Lexi Expressway.(Leshan-Mabian Section）The longest tunnel。Due to the complexity of surrounding rock，With unfavorable geology，It brings great difficulties to the project construction。In the course of construction，China Railway Lexi Expressway Co., Ltd. strictly controls the tunnel construction scheme、Safe、Quality Gate，Ensure that the project construction is foolproof.。Lexi ExpresswaySGBid 5 Project Department insists on“Tube advance、Strict grouting、Weak blasting、Short footage、Early closure、Measure frequently、Tight lining”The principle of，Scientific planning、Carefully managed，Continuous optimization of excavation methods，Adopt“Short、Tight、Hurry up、Diligence”The mode and various effective measures overcome the bias at the entrance of the tunnel.、Shallow burial depth、The surrounding rock joints and fissures are developed and extremely broken and other construction problems.。Through unremitting struggle，The tunnel went through smoothly。（Leshan Transportation Bureau）