CAJ | 학술논문

渝黔铁路新白沙沱长江特大桥主塔墩3号墩位于主河槽通航航道上，水深15～20m，河床地形条件复杂，部分为水下爆破区域，存在卵石覆盖层、倾斜光板岩，突石等多种情况；基础施工采取先平台后围堰的方案，且钻孔与围堰同步双层作业。3号墩桩基础为36根直径3?2m的钻孔桩，承台施工采用双壁钢套箱围堰方案。对该套箱围堰的组拼、下沉、定位、堵漏、抛填等施工工序中应用的工艺、技术措施进行了分析总结。
투검철로신백사타장강특대교주탑돈3호돈위우주하조통항항도상，수심15～20m，하상지형조건복잡，부분위수하폭파구역，존재란석복개층、경사광판암，돌석등다충정황；기출시공채취선평태후위언적방안，차찬공여위언동보쌍층작업。3호돈장기출위36근직경3?2m적찬공장，승태시공채용쌍벽강투상위언방안。대해투상위언적조병、하침、정위、도루、포전등시공공서중응용적공예、기술조시진행료분석총결。
The No. 3 main tower pier of New Baishatuo Yangtze River Bridge in Chongqing-Guiyang Railway is positioned on the navigation channel of the main river channel. The depth of water is about 15 to 20 m, the bed topography condition is complicated that a part of the bed topography is underwater blasting area, and several situations of covered pebble bed, inclined bare rock, raised rocks are existed. The foundation construction adopts the scheme of starting with the construction of the platform and then the cofferdam, and drilling and cofferdam are operated synchronously on two decks. The pile foundation of the No. 3 pier is 36 drilled piles with the diameter of 3?2 m, and the cushion cap construction adopts the double-walled steel boxed cofferdam scheme. The technologies and technical measures applied to the construction procedures of assembling, sinking, positioning, leaking stoppage, dumping filling are analyzed and summarized.