土压平衡箱涵掘进机的设计研究
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摘要
为解决管幕箱涵工程中,大断面箱涵推进阶段正面土压力平衡失稳导致的管幕体系失效的问题,依托上海市田林路下穿中环线地道工程,设计1台土压平衡箱涵掘进机用于箱涵推进施工,并介绍箱涵掘进机的设计条件、主要参数选择,壳体结构受力分析和应用情况及效果。研究结果表明:1)土压平衡箱涵掘进机通过正面土压力的平衡有利于地面沉降控制; 2)通过SolidWorks三维平台对箱涵掘进机的壳体进行建模受力分析,得出结构设计完全能够满足施工荷载条件; 3)箱涵掘进机的姿态控制主要依靠已完成的管幕作为导向,并通过同步推进系统调整箱涵左右行程偏差; 4)刀盘配置存在切削盲区,在加固区施工过程中会造成推力过大。
During the jacking of large cross-section pipe curtain box-culvert, the instability of earth pressure on tunneling face often causes failure of pipe curtain system. As a result, an earth pressure balanced box-culvert tunneling machine is designed for jacking construction of Tianlin Road crossing underneath Central Ring Road in Shanghai. The design conditions and main parameters selection of box-culvert tunneling machine, stress analysis of shell structure and its application and effect are introduced. The results show that:(1) The balance of front earth pressure of box-culvert tunneling machine is conducive to surface settlement control.(2) The force analysis results of shell structure of box-culvert tunneling machine by SolidWorks 3 D platform indicates that the structural design can fully meet the construction load conditions.(3) The attitude control of box-culvert tunneling machine mainly relies on the completed pipe curtain as guidance, and the deviation can be adjusted by synchronous jacking system.(4) The cutting blind area in the cutterhead configuration will cause excessive jacking force in the construction process of reinforcement area.
During the jacking of large cross-section pipe curtain box-culvert, the instability of earth pressure on tunneling face often causes failure of pipe curtain system. As a result, an earth pressure balanced box-culvert tunneling machine is designed for jacking construction of Tianlin Road crossing underneath Central Ring Road in Shanghai. The design conditions and main parameters selection of box-culvert tunneling machine, stress analysis of shell structure and its application and effect are introduced. The results show that:(1) The balance of front earth pressure of box-culvert tunneling machine is conducive to surface settlement control.(2) The force analysis results of shell structure of box-culvert tunneling machine by SolidWorks 3 D platform indicates that the structural design can fully meet the construction load conditions.(3) The attitude control of box-culvert tunneling machine mainly relies on the completed pipe curtain as guidance, and the deviation can be adjusted by synchronous jacking system.(4) The cutting blind area in the cutterhead configuration will cause excessive jacking force in the construction process of reinforcement area.
引文
[1] 荣亮,杨红军.郑州市下穿中州大道超大断面矩形隧道顶管姿态控制技术[J].隧道建设,2015,35(12):1338.RONG Liang,YANG Hongjun.Settlement control technology for tunnel crossing underneath Zhongzhou avenue in Zhengzhou constructed by super-large rectangular cross-section pipe-jacking machine[J].Tunnel Construction,2015,35(12):1338.
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[11] 王滕,王秀英,谭忠盛,等.管幕-箱涵下穿运营铁路线地层变形分析及控制技术[J].北京交通大学学报,2017(3):88.WANG Teng,WANG Xiuying,TAN Zhongsheng,et al.Analysis and control of ground deformation of pipe-roofing and box-culvert construction under railway line[J].Journal of Beijing Jiaotong University,2017(3):88.
[12] 徐新,付江山,吴晓斌,等.矩形顶管施工引起的地表沉降研究[J].公路工程,2017,42(4):4.XU Xin,FU Jiangshan,WU Xiaobin,et al.Research of surface settlement induced by rectangular pipe-jacking construction[J].Highway Engineering,2017,42(4):4.
[13] 王胜勇.基于SolidWorks三维建模矩形顶管掘进机壳体的设计[J].隧道建设,2015,35(3):274.WANG Shengyong.Design of shell of rectangular pipe jacking machine based on SolidWorks modeling[J].Tunnel Construction,2015,35(3):274.
[14] 戴清.田林路地道箱涵顶力施工计算及后靠座设计[J].江西建材,2016(14):199.DAI Qing.Construction calculation of box culvert jacking force and design of back seat of Tianlin Road Tunnel[J].Jiangxi Building Materials,2016(14):199.
[15] 米智楠,潘柳萍,陈龙安,等.大断面箱涵液压同步推进控制系统[J].同济大学学报(自然科学版),2012,40(7):1089.MI Zhinan,PAN Liuping,CHEN longan,et al.Synchronously jacking hydraulic system of large cross-section box tunneling[J].Journal of Tongji University(Natural Science),2012,40(7):1089.
[2] 银英姿,赵强,崔芳静,等.土压平衡矩形顶管施工引起的地表沉降探究[J].长江科学院院报,2019,36(1):95.YIN Yingzi,ZHAO Qiang,CUI Fangjing,et al.Ground subsidence caused by earth pressure balanced rectangular pipe jacking construction[J].Journal of Yangtze River Scientific Research Institute,2019,36(1):95.
[3] 陈立生,程池浩,葛金科,等.管幕箱涵法隧道在软土地层中的应用技术研究[J].中国市政工程,2016(增刊1):12.CHEN Lisheng,CHENG Chihao,GE Jinke,et al.Study of application technology of pipe curtain box culvert tunnel in soft soil stratum[J].China Municipal Engineering,2016 (S1):12.
[4] 周松,杨俊龙,葛金科.软土地层大断面管幕-箱涵施工技术[J].岩土工程界,2006,9(2):30.ZHOU Song,YANG Junlong,GE Jinke.Construction technology of large cross-section pipe box-culvert in soft ground[J].Geotechnical Engineering World,2006,9(2):30.
[5] 曹文宏,林汉民,陈鸿,等.软土地层管幕内推进箱涵前端网格工具头设计[J].岩土工程界,2006,9(2):33.CAO Wenhong,LIN Hanmin,CHEN Hong,et al.Design of front-end grid tool head for jacking box culvert inside pipe curtain in soft soil stratum[J].Geotechnical Engineering World,2006,9(2):33.
[6] 朱合华,李向阳,肖世国,等.软土地层管幕-箱涵推进工具管网格自平衡设计理论研究[J].岩石力学与工程学报,2005,24(13):2242.ZHU Hehua,LI Xiangyang,XIAO Shiguo,et al.Study of self-balance design theory of culvert grid advanced in pipe-roof in saturated soft soil layers[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(13):2242.
[7] 肖世国,夏才初,李向阳,等.管幕内推进箱涵前端网格横截面尺寸确定[J].岩石力学与工程学报,2005,24(14):2593.XIAO Shiguo,XIA Caichu,LI Xiangyang,et al.Design method for cross-section sizes of grids inserted in the front of a box culvert surrounded by pipe-roof[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2593.
[8] 肖世国,朱合华,李向阳,等.管幕内推进箱涵前端网格内壁土压力分布模式[J].岩土工程学报,2005,27(8):908.XIAO Shiguo,ZHU Hehua,LI Xiangyang,et al.Distribution mode of earth pressure on inner plates of steel grids located in the front of a big box culvert surrounded by pipes in a pipe-roof project[J].Chinese Journal of Geotechnical Engineering,2005,27(8):908.
[9] 朱合华,闫治国,李向阳,等.饱和软土地层中管幕法隧道施工风险分析[J].岩石力学与工程学报,2005,24(增刊2):5549.ZHU Hehua,YAN Zhiguo,LI Xiangyang,et al.Analysis of construction risks for pipe-roofing tunnel in saturated soft soil[J].Journal of Rock Mechanics and Engineering,2005,24(S2):5549.
[10] 孙钧,虞兴福,孙旻,等.超大型“管幕-箱涵”推进施工土体变形的分析与预测[J].岩土力学,2006,27(7):1021.SUN Jun,YU Xingfu,SUN Min,et al.Analysis and prediction on soft ground deformation of a super-large shallow burried "pipe-roofing and box-culvert" jacking project under construction[J].Rock and Soil Mechanics,2006,27(7):1021.
[11] 王滕,王秀英,谭忠盛,等.管幕-箱涵下穿运营铁路线地层变形分析及控制技术[J].北京交通大学学报,2017(3):88.WANG Teng,WANG Xiuying,TAN Zhongsheng,et al.Analysis and control of ground deformation of pipe-roofing and box-culvert construction under railway line[J].Journal of Beijing Jiaotong University,2017(3):88.
[12] 徐新,付江山,吴晓斌,等.矩形顶管施工引起的地表沉降研究[J].公路工程,2017,42(4):4.XU Xin,FU Jiangshan,WU Xiaobin,et al.Research of surface settlement induced by rectangular pipe-jacking construction[J].Highway Engineering,2017,42(4):4.
[13] 王胜勇.基于SolidWorks三维建模矩形顶管掘进机壳体的设计[J].隧道建设,2015,35(3):274.WANG Shengyong.Design of shell of rectangular pipe jacking machine based on SolidWorks modeling[J].Tunnel Construction,2015,35(3):274.
[14] 戴清.田林路地道箱涵顶力施工计算及后靠座设计[J].江西建材,2016(14):199.DAI Qing.Construction calculation of box culvert jacking force and design of back seat of Tianlin Road Tunnel[J].Jiangxi Building Materials,2016(14):199.
[15] 米智楠,潘柳萍,陈龙安,等.大断面箱涵液压同步推进控制系统[J].同济大学学报(自然科学版),2012,40(7):1089.MI Zhinan,PAN Liuping,CHEN longan,et al.Synchronously jacking hydraulic system of large cross-section box tunneling[J].Journal of Tongji University(Natural Science),2012,40(7):1089.