公司的社会责任：目前观点的梳理和批判

以南广铁路大邮村隧道V级围岩浅埋段为研究对象，通过隧道施工效应数值分析、技术经济分析，比较了CRD工法和三台阶法两种施工方法。从施工效应角度出发，对地表沉降要求不十分严格的山岭隧道，两种施工方法均能满足隧道施工过程中洞室稳定和结构安全。CRD工法在控制地表沉降及洞室变形方面更优，但从施工成本、施工工效、施工管理等方面台阶法更优。在本工程采用三台阶法施工，提高了施工效率，保障了隧道施工安全和结构稳定。

Research on Construction Method of Shallow Double track Tunnel of Rapid Transit Railway

Based on Class V surrounding rock zone of shallow double track tunnel of Nanning Guangzhou railway, the author compares CRD method and three bench cut method using numerical simulation and technical economy means. The results show that the two methods can both meet requirements of mountain tunnel stability. CRD method is preferable to control surface subsidence and tunnel deformation. Three bench cut method is preferable for construction cost and efficiency and management. This project uses three bench cut method to improve construction efficiency and to ensure construction safety.