Super Long and Large Diameter Underwater Pile Foundation Rapid Construction Technology in Large Diameter Pebble+Multi Slope Tight Sandstone Formation
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摘要: 某大桥主桥桥址处地层比较复杂,主桥桩基较长、桩径较大,同时位于水深约6 m 的主航道附近,施工难度大,安全风险高,项目通过研究,提出大直径卵石+ 多斜面致密砂岩地层水下超长大直径桩基快速施工技术,极大地提高了复杂地质环境中水下超长大直径桩基的施工效率,提高了桩基施工质量,降低了桩基施工风险。Abstract: The stratum of the main bridge site of a bridge is complex, the pile foundation of the main bridge is long, the pile diameter is large, and it is located near the main channel with a water depth of about 6 m,so the construction is diffi cult and the safety risk is high. Through the research, the project puts forward the rapid construction technology of super large diameter pile foundation under water in large diameter pebble + multiinclined tight sandstone stratum, It greatly improves the construction effi ciency of super long and large diameter pile foundation under water in complex geological environment, improves the construction quality of pile foundation, and reduces the construction risk of pile foundation.
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Key words:
- large diameter /
- multiinclined plane /
- dense /
- sandstone /
- super long /
- lengthened bit /
- guided drilling /
- relay drilling /
- self anchored stiff well steel frame
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[1] 梁金星,周敏.卵石地质水中桩基施工技术[J].公路交通科技,2017(2):157. [2] 祝河清.浅谈卵石、泥岩地质桩基施工方案[C]//中国西部地区公路学会公路科技论文集,2012. [3] 钟佑明.大直径长桩钢筋笼直螺纹套筒连接及吊装施工技术[J].科技资讯,2017(30):60.
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