大东湖核心区污水传输支隧工程顶管施工关键技术研究与应用  

Key Construction Techniques for Pipe Jacking in Branches of Sewage Tunnels in Dadong Lake Core Area

作　　者：孙庆 冯文强 王志云 朱晓冬 李永峰 杨圣虎 SUN Qing;FENG Wenqiang;WANG Zhiyun;ZHU Xiaodong;LI Yongfeng;YANG Shenghu(Engineering Technology Research Institute of China Construction Third Engineering Bureau Group Co.,Ltd.,Wuhan 430000,Hubei,China;Wuhan University,Wuhan 430000,Hubei,China;China Construction Third Engineering Bureau Installation Engineering Co.,Ltd.,Wuhan 430000,Hubei,China)

机构地区：[1]中建三局工程技术研究院,湖北武汉430000 [2]武汉大学,湖北武汉430000 [3]中建三局安装工程有限公司,湖北武汉430000

出　　处：《隧道建设（中英文）》2021年第7期1218-1224,共7页Tunnel Construction

摘　　要：为解决超深长距离曲线双管岩石顶管项目中顶进距离长、小净距曲线顶进、地质复杂等难点问题,采用适应性设计的刀盘及盾体、双极纠偏、智能化控制系统等顶管机研发技术,采用自动导向测量系统和膏浆技术、分段注浆等注浆减阻技术,采用高效的泥浆系统、严格的泥水作业管理等施工技术。结果表明:1)该种泥水平衡式顶管机满足长距离曲线顶管施工,采用智能化控制系统使设备操作及项目管理更为便捷;2)高压膏浆减阻配合常规触变泥浆分段注浆对顶管进行减阻,可有效减小顶管摩阻力,经计算实际顶力仅为理论顶力的60%左右;3)采用自动导向系统满足连续小角度、小范围的纠偏,可确保顶管机顺利出洞;4)高效的泥浆系统、严格的泥水作业管理可有效克服复杂地层、小净距双管带来的困难。To achieve curved jacking with a small clear span and long distance in a complex geology,pipe-jacking techniques,including specially-designed cutterhead and main machine,bipolar deviation adjusting and intelligent control system,as well as automatic guiding system,drag reduction using paste-slurry technology and sectional grouting,efficient slurry system,and strict slurry operation management are applied.Following results are obtained:(1)The slurry balance pipe-jacking machine can meet the requirements of long-distance and curved pipe-jacking construction,and the intelligent control system is convenient for equipment operation and project management.(2)The pipe-jacking friction is effectively reduced by combining high-pressure paste slurry and the conventional sectional grouting of thixotropic slurry,and the actual jacking force is approximately 60%of the theoretical jacking force.(3)The automatic guiding system can achieve deviation adjustment with a small angle and range,thus ensuring successful pipe jacking.(4)The efficient slurry system and strict slurry operation management effectively overcome difficulties caused by a complex geology and small clear distance double-pipe jacking.

关 键 词：泥水平衡顶管机 超深长距离顶进 岩石顶管 曲线双管 自动导向 注浆减阻 泥浆循环 

分 类 号：U45[建筑科学—桥梁与隧道工程]