以色列钙质胶结地层盾构选型与适用性分析——以特拉维夫绿线轻轨工程为例  

Selection and Adaptability of Shields in Calcareous Cemented Strata in Israel:A Case Study of Tel Aviv Green Line Light Rail Project

作　　者：刘晓敏 宋子文 王世友 陈红科 靳春尚 宋立伟 LIU Xiaomin;SONG Ziwen;WANG Shiyou;CHEN Hongke;JIN Chunshang;SONG Liwei(China Construction Sixth Engineering Bureau Co.,Ltd.,Tianjin 300451,China)

机构地区：[1]中国建筑第六工程局有限公司,天津300451

出　　处：《隧道建设(中英文)》2024年第S2期452-461,共10页Tunnel Construction

基　　金：中建股份科研课题(CSCEC-2020-Z-41)。

摘　　要：特拉维夫绿线轻轨工程是以色列的第2条地下轻轨线,面临钙质胶结地层(Kurkar)中小半径曲线盾构施工经验不足的问题。通过分析以色列的地质情况和绿线线路情况,总结主驱动转矩、地层磨损、地表沉降控制和小半径转弯方面的技术难点。针对技术难点,在盾构刀盘布置、动力配置、螺旋输送机、渣土改良、推进系统和主机尺寸方面提出设计方案,并从盾构参数、刀具磨损和地层扰动3方面进行适用性分析。结果表明:1)刀具配置应避免采用中心双联刀;2)采用缩短盾构主机长度、设置主动铰接油缸和利用仿形刀进行20 mm超挖,解决了R178.3 m小半径问题;3)渣土改良可采用泡沫+水,获得良好的塑流性,塌落度约为160 mm;4)土舱压力可略小于理论计算的主动土压力值。The Tel Aviv Green Line Light Rail Project is the second underground light rail line in Israel,facing challenges due to limited experience in tunneling with shield on small-radius curves within calcareous cemented strata(Kurkar).To address this issue,the authors propose a targeted design for the shield and conduct an adaptability study.The geological conditions in Israel and the specifics of the Green Line route are analyzed,identifying key technical challenges related to main drive torque,formation wear,surface settlement control,and small-radius curves.In response to these challenges,design solutions are proposed for cutterhead layout,power configuration,screw conveyor,muck conditioning,thrust system,and machine dimensions.Furthermore,the applicability of the shield is analyzed from the perspectives of tunneling parameters,cutter wear,and ground disturbance.The results indicate the following:(1)Central twin cutters should be avoided.(2)Shortening the shield length,setting active articulation cylinders,and using profiling cutters for 20 mm over-excavation successfully solve the R178.3 m small-radius curve issue.(3)Muck conditioning with foam and water achieves good plasticity,with a slump of approximately 160 mm.(4)The earth pressure in the soil chamber can be slightly lower than the theoretical active earth pressure value.

关 键 词：盾构 钙质胶结层 小半径曲线 刀具磨损 掘进参数 

分 类 号：U45[建筑科学—桥梁与隧道工程]