超大型泥水盾構(gòu)水中接收施工技術(shù)(已修改)
2024-11-11 13:38 本頁面
【正文】 億牌地板匠工地板找陳晨超大型泥水盾構(gòu)水中接收施工技術(shù)邢慧堂（中鐵十四局集團(tuán)隧道工程分公司，濟(jì)南 250002）摘 要 對于大型泥水盾構(gòu)，由于其掌子面的保壓特性，在破洞門時必然造成內(nèi)外壓力失衡，易造成盾構(gòu)與洞門圈間隙涌泥涌砂及地表沉降事故。南京長江隧道工程采用水中接收技術(shù)，確保了洞內(nèi)外壓力平衡；另外在盾構(gòu)接收地段，采用了三軸攪拌加固、冷凍加固、強(qiáng)降水三重措施，確保盾構(gòu)接收萬無一失。本施工技術(shù)的成功運(yùn)用，對同類型地質(zhì)條件下泥水盾構(gòu)的接收有極好的借鑒和推廣意義。關(guān)鍵詞 超大型 泥水盾構(gòu) 冷凍加固 水中接收 洞門破除Underwater Receiving Technology in Superlarge Mixshield ConstructionXing Huitang(China Railway 14th Bureau Group, Co., Ltd., Jinan 250002) Abstract: In large mixshield, the pressure maintaining of face is sure to result in loss of pressure balance between inside and outside upon breakthrough, very likely to cause the surging of slurry and sand through the clearance between TBM and the portal ring, and lead to ground subsidence accidentally. In Nanjing Yangtze River Tunnel Project, the underwater receiving technology was adopted to keep pressure balance between inside and outside of tunnel portal。 in addition, three measures such as triaxial stirring piles reinforcing, freezing reinforcing and intensified dewatering have been introduced in shield receiving section to make sure the receiving perfectly safe. The successful application of this construction technology is of great significance for reference and further use for mixshield under similar geological conditions.Key words: superlarge,
黨政相關(guān)相關(guān)推薦
鄂ICP備17016276號-1