摘要
土压平衡盾构掘进施工中,土舱压力的设定对于控制盾构施工对周围环境的影响意义重大。结合超大直径土压平衡盾构施工的上海市迎宾三路隧道工程,利用理论分析和实测数据分析的方法对土压平衡盾构的土舱压力建立机制和设定准则进行研究。基于进出土平衡理念研究土舱压力建立过程中各施工参数间的关系,提出开挖面土体挤压量这一概念以揭示土舱压力的建立机制。建立盾构刀盘的细化模型,分析刀盘挤压作用下盾构开挖面上土体的挤压情况。基于控制开挖面土体不发生二次扰动的理念,提出土压平衡盾构土舱压力的设定准则,并对该土舱压力设定准则进行工程应用。现场监测数据显示,盾构掘进施工引起的地表隆沉得到有效的控制。
The chamber earth pressure control is a key operation for controlling the impact of the earth pressure balance（EPB） shield excavation on the environment.Based on Shanghai Yingbinsanlu tunnel project constructed by a super-diameter EPB shield,the established mechanism and setting standard of the chamber earth pressure are studied by the theoretical research and measured data analysis.Relationships of the shield construction parameters are studied based on the soil in-out balance concept.The established mechanism of the chamber earth pressure is revealed according to introduce the soil compressing amount at the excavation face.A detailed model of shield cutter head is introduced to analyze the soil compressing amount at the excavation face caused by the cutter head.Based on the concept of controlling the secondary disturbance of the soil at the excavation face,a setting standard of the chamber earth pressure is proposed.The research results are applied and verified in the super-diameter tunnel,monitoring data shows that the settlement caused by shield tunneling construction is controlled effectively.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2012年第3期625-631,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
上海市科委博士后基金资助项目(11r21421200)
关键词
隧道工程
土压平衡盾构
刀盘
土舱压力
设定准则
tunnelling engineering
earth pressure balance shield
cutter head
chamber earth pressure
setting standard
