摘要
珠江口隧道施工时大直径泥水平衡盾构水下穿越破碎带地层,施工风险较高、难度较大。针对泥水平衡盾构掘进过程中滞排、刀盘结泥饼、刀具磨损严重等问题,分析原因并给出预控措施,研究关键施工技术。盾构在水下断层破碎带地层掘进时须严格控制掘进参数,特别是泥水仓压力,并控制刀盘转速与贯入度。结合开挖面稳定情况、仓内排渣情况、流体输送状态,及时调整泥浆参数。通过采用破碎、冲刷等装置,避免仓内滞排风险。通过配置刀具状态智能化实时监测系统,及时更换出现异常的刀具。须设置合理的盾尾密封装置,保证盾构密封性能满足要求。
During the construction of the Pearl River Estuary Tunnel,the large-diameter slurry balance shield crosses through the fractured zone under water,and the construction risk is high and difficult.In view of the problems of stagnation,mud cake and serious tool wear in the process of slurry balance shield tunnelling,this paper analyzes the causes and gives the pre-control measures to study the key construction technology.When the shield tunnelling in the stratum of underwater fault fracture zone,it is necessary to strictly control the tunnelling parameters,especially the pressure of mud sump,and control the rotation speed and penetration of cutterhead.Combined with the stability of the excavation surface,the slag discharge in the warehouse and the fluid transport state,the mud parameters are adjusted in time.By using crushing,scouring and other devices,the risk of stagnation in the warehouse is avoided.By configuring the intelligent real-time monitoring system of tool condition,the abnormal tool can be replaced in time.A reasonable shield tail sealing device should be set to ensure that the shield sealing performance meets the requirements.
作者
张迎旭
许斌斌
ZHANG Yingxu;XU Binbin(China Railway Tunnel Group Co.,Ltd.,Guangzhou,Guangdong511466,China;China Railway Tunnel Stock Co.,Ltd.,Zhengzhou,Henan450000,China)
出处
《施工技术（中英文）》
CAS
2024年第15期42-46,共5页
Construction Technology
基金
国家自然科学基金(52078430)。
关键词
隧道
盾构
掘进
破碎带
刀盘
施工技术
tunnels
shields
tunnelling
fracture zone
cutterhead
construction
