金鸡山隧道拓宽结构设计

Design of Widening Structure of Jinjishan Tunnel

采用定性分析和数值分析方法,针对金鸡山隧道拓宽工程的难点问题,提出相应技术解决措施,并结合工程实践,运用监控量测实测数据进行验证,认为:金鸡山四车道隧道采用的二次支护的结构型式及其衬砌支护参数是安全合理的,结合控制爆破技术和相应的安全防护措施,设计采用的CRD法和CD法等施工方法能够满足安全施工的要求。

Using the methods of qualitative analysis and numerical analysis, in view of the more difficult problems of widening project of Jinjishan tunnel, put forward the corresponding technical measures, and combined with the engineering practice, verify by the measured data of monitoring and measurement, think： structure type of two supporting structure and lining support parameters of Jinjishan four - lane tunnel is safe and reasonable, and combined with the controlled blasting technique and the corresponding safety protection measures, the construction method of the CRD and the CD can satisfy the requirements for safe construction.