大华山隧道洞口工程施工方案.docx

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1、word目录一、工程及地质概况........................................................................................................................................11.1隧道工程概况...............................................................................................................................

2、........11.2洞口段工程地质概况...........................................................................................................................1二、洞口工程施工.......................................................................................................................................

3、.....12.1洞口原地面测量复核.......................................................................................................................12.2洞口工程工艺流程............................................................................................................................32.2.1施作洞顶截水沟..

4、......................................................................................................................32.2.2洞口段开挖（成洞面保留核心土）........................................................................................32.2.3边仰坡防护施工................................................

5、........................................................................42.2.4施作长管棚套拱、管棚............................................................................................................62.2.5右洞重力式偏压挡墙施工...........................................................................

6、.............................82.3洞口段洞身开挖...................................................................................................................................92.4洞门墙施工............................................................................................................

7、...............................92.5进度安排...............................................................................................................................................9三、质量保证措施.................................................................................