隧道开挖优化及施工技术要点分析

Optimization of Tunnel Excavation and Analysis of Construction Technology

随着我国经济的迅速发展,隧道的开挖技术也越来越成熟,已经发展出各种开挖隧道的技术方法。结合成都经济区环线高速公路简阳至蒲江段项目二峨山、长秋山两座隧道工程,围岩设计为Ⅳ级,中隔壁法开挖法,经综合各方面分析后现场决定采用两台阶开挖进行施工更为适宜,并进一步提出了对施工图设计的优化调整方案,更好地节约了成本,加快了施工进度。

With the rapid development of China＇s economy, the tunnel excavation technology is more and more mature, has developed a variety of excavation tunnel technology.This article through the Jianyang to Pujiang section of Chengdu Economic Zone, two ring expressway project as an long Akiyama two tunnel design of surrounding rock grade IV, the excavation method, through the comprehensive analysis of all aspects of the scene after decided to use two step excavation construction is more suitable, and further puts forward the optimization of construction design, better to save costs, accelerate the construction schedule.