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  

Super Long and Large Diameter Underwater Pile Foundation Rapid Construction Technology in Large Diameter Pebble+multi Slope Tight Sandstone Formation

作　　者：徐帅军 卫康 郑春雨 XU Shuaijun;WEI Kang;ZHENG Chunyu(NO.1 ENGINEERING CO.,LTD.OF FHEC OF CCCC,Beijing102200)

机构地区：[1]中交一公局第一工程有限公司,北京102200

出　　处：《智能建筑与工程机械》2021年第6期39-41,共3页Intelligent Building and Construction Machinery

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6m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。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 6m,so the construction is difficult 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+multi inclined tight sandstone stratum,It greatly improves the construction efficiency 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.

关 键 词：大直径 多斜面 致密 砂岩 超长 加长钻头 导向钻进 接力钻进 自锚式劲性井字钢架 

分 类 号：U445.55[建筑科学—桥梁与隧道工程]