固结黏土地层盾构直接破除排水板关键技术研究
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摘要
宁波地铁5号线1期下穿高速公路路基时存在68°斜交长40 m的含塑料排水板的固结黏土地层,为研究盾构直接通过可行性、刀具选型、施工参数优化等问题,利用TBM掘进模态综合试验平台,进行了不同类型刀具、不同掘进参数的固结黏土地层排水板破除试验。研究表明:对于含排水板的固结黏土地层,在合理选择刀具、盾构参数并优化掘进参数情况下,盾构法施工直接破除基本可行,试验为宁波地铁工程建设提供了依据,也可为类似工程设计及施工提供参考。
The shield used in Phase 1 of Ningbo Metro Line No. 5 has to cross consolidated clay with plastic drainage plates with oblique angle of 68° and length of 40 m when crossing underneath highway roadbed. The highway roadbed would settle and the shield would be jammed in case of improper treatment. In order to prove the feasibility of the shield cutting and direct crossing and study the cutter selection and parameter optimization, some experiments on drainage plate breaking of consolidated clay with different types of cutters and tunneling parameters are carried out based on TBM boring mode experimental platform. The results show that the shield direct cutting plastic drainage plate in consolidated clay is feasible under the conditions of rational cutter selection and optimal parameter settings. The experiments provide basis for the construction of Ningbo Metro has provided experimental reference, and can further provide reference for shield tunneling and design of similar projects in the future.
The shield used in Phase 1 of Ningbo Metro Line No. 5 has to cross consolidated clay with plastic drainage plates with oblique angle of 68° and length of 40 m when crossing underneath highway roadbed. The highway roadbed would settle and the shield would be jammed in case of improper treatment. In order to prove the feasibility of the shield cutting and direct crossing and study the cutter selection and parameter optimization, some experiments on drainage plate breaking of consolidated clay with different types of cutters and tunneling parameters are carried out based on TBM boring mode experimental platform. The results show that the shield direct cutting plastic drainage plate in consolidated clay is feasible under the conditions of rational cutter selection and optimal parameter settings. The experiments provide basis for the construction of Ningbo Metro has provided experimental reference, and can further provide reference for shield tunneling and design of similar projects in the future.
引文
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[17] 程池浩,赵国强,廖少明,等.武汉老黏土地层土压盾构适应性研究[J].施工技术,2016,45(19):105.CHENG Chihao,ZHAO Guoqiang,LIAO Shaoming,et al.Adaptability study of EPB shield machine in hard clay in Wuhan[J].Construction Technology,2016,45(19):105.
[2] 刘希成,刘纯.搅拌桩联合排水板复合地基在机场软基处理中的应用[J].国防交通工程与技术,2019,17(1):61.LIU Xicheng,LIU Chun.The application of the mixed-in-place piles-draining-boards-combined composite foundation to the treatment of soft-soil foundation of airports[J].Traffic Engineering and Technology for National Defence,2019,17(1):61.
[3] 徐梨丹,雷国辉.砂垫层对排水板地基固结效率的影响及设计方法[J].中南大学学报(自然科学版),2017,48(4):1035.XU Lidan,LEI Guohui.Effect of sand blanket on efficiency of ground consolidation with prefabricated vertical drains and its design method[J].Journal of Central South University (Science and Technology),2017,48(4):1035.
[4] 黄朝煊,方咏来,曾甑.塑料排水板处理地基固结特性研究[J].长江科学院院报,2017,34(2):99.HUANG Chaoxuan,FANG Yonglai,ZENG Zhen.Consolidation characteristics of foundation treated by prefabricated vertical drains[J].Journal of Yangtze River Scientific Research Institute,2017,34(2):99.
[5] 高广运,聂春晓,张海丘,等.塑料排水板结合真空预压法的径向固结解析解[J].同济大学学报(自然科学版),2017,45(9):1290.GAO Guangyun,NIE Chunxiao,ZHANG Haiqiu,et al.Radial consolidation solution of plastic wick drain combined vacuum preloading[J].Journal of Tongji University (Natural Science),2017,45(9):1290.
[6] 刘爱民,梁爱华,尹长权.整体式塑料排水板与普通塑料排水板加固效果对比试验[J].岩土工程学报,2016,38(增刊1):130.LIU Aimin,LIANG Aihua,YIN Changquan.Comparative tests on reinforcement effects of integral and ordinary plastic drainage boards[J].Chinese Journal of Geotechnical Engineering,2016,38(S1):130.
[7] 高会强,莫海鸿.考虑通水量影响的塑料排水板加固深度的理论研究[J].岩石力学与工程学报,2016,35(增刊1):3337.GAO Huiqiang,MO Haihong.Theoretical study of reinforced depth of plastic vertical drain considering the water flux[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(S1):3337.
[8] 王国富,路林海,李强.区间隧道近距穿越高速公路桥头变形控制新技术研究[J].现代隧道技术,2017,54(5):217.WANG Guofu,LU Linhai,LI Qiang.New techniques for bridgehead deformation control for expressways passed by approaching metro running tunnels[J].Modern Tunnelling Technology,2017,54(5):217.
[9] 李应姣.盾构机穿越塑料排水板软土路基段施工技术探究[J].铁道建筑技术,2015(5):58.LI Yingjiao.Research on the construction technology of the shield machine crossing the plastic drainage board in the soft soil subgrade[J].Railway Construction Technology,2015(5):58.
[10] 张志良,王学龙.生物法在盾构机穿越塑料排水板区段中的应用[J].广州建筑,2015,43(4):39.ZHANG Zhiliang,WANG Xuelong.The application of biological method on shield tunnel construction crossing the plastic drainage plate section[J].Guangzhou Architecture,2015,43(4):39.
[11] 张弛,徐天明,庄欠伟.珠海横琴三通道盾构切削塑料排水板试验[J].地下工程与隧道,2016(3):26.ZHANG Chi,XU Tianming,ZHUANG Qianwei.Experiments on shield machine cutting plastic drainage plates in Zhuhai-Hengqin No.3 Tunnel [J].Underground Engineering and Tunnels,2016(3):26.
[12] 卓兴建,李普庆,贺飞.TBM掘进综合试验台的研制[J].隧道建设,2013,33(7):615.ZHUO Xingjian,LI Puqing,HE Fei.Development of TBM boring test bench[J].Tunnel Construction,2013,33(7):615.
[13] 丁平,尹清锋,刘阳君,等.高黏性土质地层土压平衡盾构施工技术研究[J].江西理工大学学报,2018,39(1):22.DING Ping,YIN Qingfeng,LIU Yangjun,et al.Technical study of earth pressure balance shield construction in high cohesive soil stratum[J].Journal of Jiangxi University of Science and Technology,2018,39(1):22.
[14] 顾刚,颜永国,冯春,等.复合地层盾构刀盘掘进速率及受力特性分析[J].隧道建设(中英文),2018,38(11):1895.GU Gang,YAN Yongguo,FENG Chun,et al.Analysis of advancing speed and force characteristics of shield cutterhead in composite strata[J].Tunnel Construction,2018,38(11):1895.
[15] 闵凡路,柏煜新,刘来仓,等.盾构刀具切削研究进展及非正常磨损实例分析[J].中国公路学报,2018,31(10):47.MIN Fanlu,BAI Yuxin,LIU Laicang,et al.Research progress of shield cutter cutting and analysis of abnormal wear cases[J].China Journal of Highway and Transport,2018,31(10):47.
[16] 占传忠.复合地层盾构的适应性及掘进参数的关联性分析[J].中国煤炭地质,2018,30(增刊1):97.ZHAN Chuanzhong.Relevance analysis of shield tunneling adaptability to composite strata and tunneling parameters[J].Coal Geology of China,2018,30(S1):97.
[17] 程池浩,赵国强,廖少明,等.武汉老黏土地层土压盾构适应性研究[J].施工技术,2016,45(19):105.CHENG Chihao,ZHAO Guoqiang,LIAO Shaoming,et al.Adaptability study of EPB shield machine in hard clay in Wuhan[J].Construction Technology,2016,45(19):105.
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