開(kāi)工前施工準(zhǔn)備→洞頂截水溝開(kāi)挖、砌筑及洞口排水→洞口土石方開(kāi)挖及臨時(shí)防護(hù)→套拱、超前管棚等進(jìn)洞輔助措施施工→淺埋段開(kāi)挖、初期支護(hù)及仰供施工→淺埋段及洞口明洞模筑襯砌施工→洞身開(kāi)挖及排水→洞身初期支護(hù)→仰 (共 137 字) [閱讀本文] >>
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 開(kāi)工前施工準(zhǔn)備→洞頂截水溝開(kāi)挖、砌筑及洞口排水→洞口土石方開(kāi)挖及臨時(shí)防護(hù)→套拱、超前管棚等進(jìn)洞輔助措施施工→淺埋段開(kāi)挖、初期支護(hù)及仰供施工→淺埋段及洞口明洞模筑襯砌施工→洞身開(kāi)挖及排水→洞身初期支護(hù)→仰 (共 137 字) [閱讀本文] >>