西香高速建设再提速 泸沽湖特大桥同日取得两大关键进展

Core Insights - The construction of the Xichang to Shangri-La Expressway, particularly the Lugu Lake Grand Bridge, has achieved significant milestones, including the completion of the height of the tower exceeding 100 meters and the precise installation of the beam, marking a rapid advancement in the project [4][5]. Project Overview - The G7611 Xichang to Shangri-La Expressway project spans a total length of 233.132 kilometers with a design speed of 80 km/h and a bridge-tunnel ratio of 73.4%. The cost per kilometer is approximately 2.51 billion yuan [3]. - The project officially commenced construction in 2022 and has now entered a large-scale construction phase [3]. Engineering Achievements - The Lugu Lake Grand Bridge is a key component of the expressway, measuring 1952 meters in total length, with a main span of 1680 meters, making it a steel truss suspension bridge. It is recognized for holding multiple world records, including the largest span cable-stayed bridge and the largest underground interchange in mountainous areas [4][5]. - The construction of the bridge has been characterized by innovative techniques, such as the use of a "double insurance visual aerial self-regulating hoisting system," which allows for real-time adjustments during the installation of beams, achieving millimeter-level precision [6]. Investment and Progress - As of this year, over 80% of the planned investment of 11.5 billion yuan has been completed, amounting to 9.558 billion yuan [9]. - All critical and challenging engineering projects along the expressway have commenced, with 32 tunnels and 131 bridges, of which 128 bridges are under construction [9]. - The project is part of a broader initiative in Sichuan province to complete 900 kilometers of expressways, particularly focusing on the regions of Ganzi, Aba, and Liangshan [9].