摘要
土压平衡盾构在临海富水砂层中接收时,面临水位高、渗透性强、补给量大等难题,同时海水潮汐水位波动、海水弱化注浆加固质量等因素会增加盾构接收的风险,选用合适的接收方式及针对性控制措施对工程安全至关重要。通过对接收端地质和水文条件、工期、造价、风险控制等方面进行综合考虑,分析富水砂层中传统注浆加固+短套筒、长套筒接收、水下接收等3种主要盾构接收方式的优缺点,并确定其各自适用工况。以厦门地铁3个富水砂层中盾构接收工程为例,比选不同工况条件下富水砂层盾构接收工法,并提出相应的接收风险控制技术。工程实践结果表明,提出的地铁土压平衡盾构临海富水砂层接收风险控制技术具有较高的安全性及可靠性。
When earth pressure balance(EPB)shield machines are received in water-rich sandy layers near the sea,they face challenges such as high water levels,strong permeability,and large water replenishment volumes.Additionally,factors like fluctuations in sea tides and water levels,and the weakening effect of seawater on grouting reinforcement quality,increase the risks associated with EPB shield reception.Choosing an appropriate reception method and implementing targeted control measures are crucial for ensuring engineering safety.Through a comprehensive analysis of geological and hydrological conditions at the retrieval end,as well as factors such as construction schedule,cost,and risk control,the advantages and disadvantages of three primary reception methods,traditional grouting reinforcement combined with short sleeve method,long sleeve method,and underwater reception method,for shield machine used in water--rich sandy layers are clarified,and the specific conditions for each method are determined.Taking three cases of Xiamen Metro about the EPB shield reception in water-rich sandy layers as examples,the appropriate reception methods of shield machine for different conditions are compared and selected,and the corresponding risk control techniques are proposed.Engineering practice results show that the proposed risk control techniques for the EPB shield reception in coastal water.rich sandy layers exhibit high safety and reliability.The research results can provide valuable references for EPB shield reception projects in similar coastal areas.
作者
刘典基
冯欢欢
LIU Dianji;FENG Huanhuan(Xiamen Metro Construction Co.,Ltd,Xiamen 361004;China Railway Tunnel Group Co.,Ltd,Guangzhou 511458)
出处
《现代隧道技术》
CSCD
北大核心
2024年第S01期985-995,共11页
Modern Tunnelling Technology
基金
国家重点研发计划项目(2020YFB1712100)
中国中铁科技开发计划(2022-重大-18)
关键词
土压平衡盾构
临海富水砂层
盾构接收
风险控制技术
EPB shield tunnelling
Water rich sandy layers near the sea
Receiving of shield machine
Risk control technology
作者简介
刘典基(1976-),男,高级工程师,主要从事地铁建设管理工作,E-mail:644378797@qq.com;通讯作者:冯欢欢(1987-),男,硕土,正高级工程师,主要从事隧道及地下工程技术研究与管理工作,E-mail:skl_fhh@163.com.
