Abstract: In allusion to the unfavorable geological condition and project trait in construction in Twin-tunnel at south mountain haiyou in zhejiang,a series of efective drainage construction technic、methods and the prevention and cure step of common fault are introduced，In particular，the antiseep technic for mid partition is the first example in our country in this period ．

Key words: double-tunnel, guarded drainage, construction technic, mid-partition, craze, seepage water, prevention and cure

摘要： 浙江海游南山双联拱隧道，施工中针对不良地质条件和工程特点，采用了一系列有效的防排水施工技术、方法和通病防治措施，特别是中隔墙防渗漏技术，在国内同期尚属首例．

关键词: 双联拱隧道, 防排水, 施工技术, 中隔墙, 开裂, 渗漏水, 防治