CAJ | 학술논문

针对水文、地质、场地等外部环境条件十分复杂，工期紧，临近运营既有线，施工技术难度大等特点，新白沙沱长江大桥主桥水中3号主塔墩基础采用先平台后围堰方案施工，适应实际情况。阐述了大面积水下、水上岩面爆破清理技术研究应用，水下河床快速测量技术，平台的整体拼装浮运提升技术，大直径深水钻孔桩清水成孔技术，深水突起岩石平台上大尺寸套箱围堰同步拼装技术，大型围堰水下堵漏等技术。总结了3号主塔墩基础施工技术研究及运用效果。最终确保基础施工达到安全、优质快速、缩短工期、减少成本的目的。
침대수문、지질、장지등외부배경조건십분복잡，공기긴，림근운영기유선，시공기술난도대등특점，신백사타장강대교주교수중3호주탑돈기출채용선평태후위언방안시공，괄응실제정황。천술료대면적수하、수상암면폭파청리기술연구응용，수하하상쾌속측량기술，평태적정체병장부운제승기술，대직경심수찬공장청수성공기술，심수돌기암석평태상대척촌투상위언동보병장기술，대형위언수하도루등기술。총결료3호주탑돈기출시공기술연구급운용효과。최종학보기출시공체도안전、우질쾌속、축단공기、감소성본적목적。
This paper introduces foundation construction of No. 3 main tower pier of New Baishatuo Yangtze River Bridge, which is in river and close to existing railway, not only faces complex external environmental conditions such as hydrology, geology and site, but also faces very short construction period and difficult construction technology. To adapt to the actual situation, the construction platform was built first, then the cofferdam was built. This paper introduces some construction technologies used for the foundation of No. 3 main tower pier,such as rock blasting technology in water in a large area, fast measurement technology in water, floating and installation technology for the whole construction platform, the technology for boring large diameter bored pile with little slurry, the technology for installing large steel box cofferdam synchronously over the rough rock in water, the technology for preventing leakage of large steel box cofferdam in water. This paper summarizes the construction technology which is used for the foundation of No. 3 main tower pier and application results. Based on the above technologies, the bridge was built safely, fast and high-quality, the purpose for shortening the construction period and reducing costs was realized.