本隧道进、出口均处于浅埋地段，进口进洞为Ⅲ类围岩，采用Ⅱ式Ⅲ类明洞衬砌。隧道出口围岩破碎、浅埋，采用Ⅳ式Ⅲ类明洞衬砌。整条隧道普遍埋深较浅，且离既有线很近（最近处只有20m），施工中会互相影响。隧道岩性为灰或深灰色石灰岩。但根据设计图样，隧道的埋深及多处断层的出现，隧道会受地表水影响较大，岩溶发育。因此施工中要做好防排水及处理溶洞的准备。本隧道根据围岩地质状况的不同，分别设计成整体式衬砌和减薄式衬砌两种式，其中包括DⅡK199＋800～890 锚段和DⅡK201＋050～070 段的特殊衬砌。除DⅡK201＋070～770 段采用C20 耐腐蚀混凝土外，均采用普通混凝土。
目录
第一章 总体概况说明 ················································································· 1
一、编制依据····························································································· 1
二、工程简介····························································································· 1
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一、质量保证措施··················································································· 38
二、工期保证措施··················································································· 55
三、安全保证措施··················································································· 59
四、环境保护措施··················································································· 67