广西水利水电
廣西水利水電
엄서수이수전
GX WATER RESOURCES & HYDROPOWER ENGINEERING
2012年
6期
47-49
,共3页
隧洞洞口段%地表预注浆加固技术%施工
隧洞洞口段%地錶預註漿加固技術%施工
수동동구단%지표예주장가고기술%시공
Tunnel portal section%surface pre-grouting reinforcement technology%construction
青海省湟水北干渠扶贫灌溉一期工程27标段46#隧洞进口工程地质条件复杂,常规导管及管棚法进行洞口段施工时进尺慢、成型差,且存在较大安全隐患.为此,采用地表预注浆加固技术加固处理后再开挖.结果表明:洞口段岩体稳定,施工安全且成洞好,并加快了工程进度.
青海省湟水北榦渠扶貧灌溉一期工程27標段46#隧洞進口工程地質條件複雜,常規導管及管棚法進行洞口段施工時進呎慢、成型差,且存在較大安全隱患.為此,採用地錶預註漿加固技術加固處理後再開挖.結果錶明:洞口段巖體穩定,施工安全且成洞好,併加快瞭工程進度.
청해성황수북간거부빈관개일기공정27표단46#수동진구공정지질조건복잡,상규도관급관붕법진행동구단시공시진척만、성형차,차존재교대안전은환.위차,채용지표예주장가고기술가고처리후재개알.결과표명:동구단암체은정,시공안전차성동호,병가쾌료공정진도.
No.46 tunnel is a component of No.27 bidding section of Huangshui North trunk canal stage-1 irrigation project located in Qinghai Province. The tunnel portal section has complex engineering geological conditions. Con?ventional conduit and pipe roof method renders low advancing speed, unsatisfactory shape and safety risk. There?fore, surface pre-grouting reinforcement technology was applied prior to excavation. Construction practice demon?strated stable rock mass at tunnel portal section, safe construction, satisfactory shape and accelerated progress.
