摘要
为了探究施工期盾构隧道管片上浮规律及影响因素,提出针对性的控制措施,依托津沽海河隧道工程,建立流固耦合作用下的大直径盾构隧道下穿河流施工数值计算模型,通过数值计算揭示上浮量和施工参数的关系,将影响管片上浮的施工参数进行归一化处理。研究表明:管片脱离盾尾后上浮量逐渐增大,在上浮力消散效应作用下,上浮量增大速率降低,直至停止增长,随后受管片自重影响,上浮量逐渐减小并趋于稳定;管片上浮量与注浆压力、盾构推力、浆液初凝时间呈正相关,与覆土厚度、浆液弹性模量呈负相关。
In order to explore the floating law and influencing factors of shield tunnel segments during construction,and put forward targeted control measures,this paper relies on the Jingu Haihe River Tunnel Project to establish a numerical calculation model for the construction of large-diameter shield tunnels under the river under the action of fluid-solid coupling.The relationship between the floating amount and the construction parameters is revealed by numerical calculation,and the construction parameters affecting the floating of the segments are normalized.The research shows that the floating amount of the segments increases gradually after the segments are separated from the shield tail.Under the effect of the dissipation of the buoyancy,the increase rate of the floating amount decreases until it stops growing,and then affected by the weight of the segments,the floating amount gradually decreases and tends to be stable.The floating amount of segment is positively correlated with grouting pressure,shield thrust and initial setting time of slurry,and negatively correlated with overburden thickness and elastic modulus of slurry.
作者
王禹淮
周袁凯
李文江
王为鑫
WANG Yuhuai;ZHAO Yuankai;LI Wenjiang;WANG Weixin(College of Civil Engineering,Shijiazhuang TieDao University,Shijiazhuang 050043;China Railway 14 Bureau Group Tunnel Engineering Co.,Ltd.,Jinan 250000)
出处
《现代隧道技术》
北大核心
2025年第S1期592-599,共8页
Modern Tunnelling Technology
关键词
盾构隧道
下穿河流
管片上浮
流固耦合
同步注浆
Shield tunnel
Underpass the river
Segment floating
Fluid-solid coupling
Synchronous grouting
