浅埋暗挖隧道管棚支护参数的研究及应用
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摘要
文章以某下穿浅埋暗挖隧道管棚超前加固为研究对象,分析了管棚支护参数的应用理论,采用刚度折算模型,将管棚层折算为各向同性的加固体,并对单层及双层管棚的超前加固效果进行了数值模拟计算,并与监测数据进行了对比分析,在此基础上对不同直径管棚的加固效果进行了分析。分析结果表明:对于常用管棚,随着管棚直径的加大,初期支护及临时支撑的内力有明显减小,并能更好地减小地表的沉降。
Based on the pipe roof advance support of a certain shallow bored tunnel, the application theory of piperoof parameters is analyzed. Using a stiffness reduction model, the pipe roof layer is converted into an isotropic rein-forcement body, a numerical simulation is conducted for the effects of single-and double-layer pipe roof advance rein-forcement, and a comparison with monitoring data is carried out. An analysis of the reinforcement effects of a pipe roofwith different diameters is undertaken. The results show that the internal force of the initial support and temporarysupport decrease with an increase of the pipe roof diameter, and surface settlement therefore decreases.
Based on the pipe roof advance support of a certain shallow bored tunnel, the application theory of piperoof parameters is analyzed. Using a stiffness reduction model, the pipe roof layer is converted into an isotropic rein-forcement body, a numerical simulation is conducted for the effects of single-and double-layer pipe roof advance rein-forcement, and a comparison with monitoring data is carried out. An analysis of the reinforcement effects of a pipe roofwith different diameters is undertaken. The results show that the internal force of the initial support and temporarysupport decrease with an increase of the pipe roof diameter, and surface settlement therefore decreases.
引文
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[12]蒋坤,夏才初,占伟明,陈佑新,丁文其.长管棚下箱涵顶进施工中管棚力学作用及其实例分析[J].土木工程学报,2010,43(2):105-109.JIANG Kun,XIA Caichu,ZHAN Weimin,CHEN Youxin,DING Wenqi.Case Study and Mechanics Action Analysis of Pipe-roof during Box-Culvert Being Advanced under Long Pipe-Roof[J].China Civil Engineering Journal,2010,43(2):105-109.
[13]伍振志,傅志锋,王静,张胜云.浅埋松软地层开挖中管棚注浆法的加固机理及效果分析[J].岩石力学与工程学报,2005,24(6):1025-1029.WU Zhenzhi,FU Zhifeng,WANG Jing,ZHANG Shengyun.Study of Support Mechanism and Effect of Shedpipe Grouting Technology for Tunneling Construction in Shallow-Buried Soft Stratum[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(6):1025-1029.
[14]李术才,朱维申,陈卫忠,李树枕.弹塑性大位移有限元方法在软岩隧道变形预估系统研究中的应用[J].岩石力学与工程学报,2002,21(4):466-470.LI Shucai,ZHU Weishen,CHEN Weizhong,LI Shuzhen.Application of Elasto-Plastic Large Displacement Finite Element Method to the Study of Deformation Prediction of Soft Rock Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(4):466-470.
[2]周顺华,李志雄,章立峰,董新平.管棚成孔引起的地表沉降[J].同济大学学报(自然科学版),2006,34(4):490-493.ZHOU Shunhua,LI Zhixiong,ZHANG Lifeng,DONG Xinping.Ground Surface Settlement Induced in the Drilling Process of Pipe Roof[J].Journal of Tongji University(Natural Science Edition),2006,34(4):490-493.
[3]周顺华,庄丽,王炳龙,雷震宇,许恺.管棚成孔失水引起地表沉降因素分析[J].中国铁道科学,2006,27(1):23-27.ZHOU Shunhua,ZHUANG Li,WANG Binglong,LEI Zhenyu,XU Kai.Analysis of Ground Surface Settlement Induced by Water Loss in the Drilling Phase of Pipe Roof Construction[J].China Railway Science,2006,27(1):23-27.
[4]董新平,周顺华,胡新朋.软弱地层管棚法施工中管棚作用空间分析[J].岩土工程学报,2006,28(7):841-846.DONG Xinping,SHOU Shunhua,HU Xinpeng.3D Analysis of Function of Pipe Roof Applied in Soft Ground[J].Chinese Journal of Geotechnical Engineering,2006,28(7):841-846.
[5]马锁柱.大直径超前管幕施工沉降试验研究[J].铁道工程学报,2006,23(6):64-66.MA Suozhu.Experimental Research on Settlement during Construction of Large-diameter Advanced Tubal Curtain[J].Journal of Railway Engineering Society,2006,23(6):64-66.
[6]李伟,顾问宇.管棚施工技术在北京地铁黄庄站施工中的应用[J].铁道建筑,2007,(7):44-46.LI Wei,GU Wenyu.Application of Pipe Shed Technique in Construction of Beijing Metro Huangzhuang Station[J].Railway Engineering,2007,(7):44-46.
[7]郭衍敬,房倩,李兵.浅埋暗挖地铁车站管棚的数值模拟及其加固效果分析[J].北京工业大学学报,2010,36(1):40-45.GUO Yanjing,FANG Qian,LI Bing.Reinforcement Mechanism and Mechanical Analysis for Pipe Roof Support Used in Subway Station with Shallow Tunnel Construction Method[J].Journal of Beijing University of Technology,2010,36(1):40-45.
[8]王海涛,贾金青,郁胜.隧道管棚预支护的力学行为及参数优化[J].中国公路学报,2010,23(4):78-83.WANG Haitao,JIA Jinqing,YU Shen.Mechanical Behavior and Parameter Optimization of Pipe Roof Reinforcement Applied in Tunnel[J].China Journal of Highway and Transport,2010,23(4):78-83.
[9]苟德明,阳军生,张戈.浅埋暗挖隧道管棚变形监测及受力机制分析[J].岩石力学与工程学报,2007,26(6):1258-1264.GOU Deming,YANG Junsheng,ZHANG Ge.Deformation Monitoring and Mechanical Behaviors of Pipe-Roof in Shallow Tunnels[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(6):1258-1264.
[10]苟德明,阳军生,高世军.下穿公路连拱隧道双层管棚预加固作用数值分析[J].长沙交通学院学报,2008,24(2):16-22.GOU Deming,YANG Junsheng,GAO Shijun.Numerical Analysis of Pre-reinforcement Action about Double-Layer Pipe Roof in Multi-Arch Tunnel under the Existing Highway[J].Journal of Changsha Communications University,2008,24(2):16-22.
[11]周顺华.软弱地层浅埋暗挖施工中管棚法的棚架原理[J].岩石力学与工程学报,2005,24(14):2565-2570.ZHOU Shunhua.Principles of Pipe Roof Applied to Shallow-Buried Tunnels in Soft Ground[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2565-2570.
[12]蒋坤,夏才初,占伟明,陈佑新,丁文其.长管棚下箱涵顶进施工中管棚力学作用及其实例分析[J].土木工程学报,2010,43(2):105-109.JIANG Kun,XIA Caichu,ZHAN Weimin,CHEN Youxin,DING Wenqi.Case Study and Mechanics Action Analysis of Pipe-roof during Box-Culvert Being Advanced under Long Pipe-Roof[J].China Civil Engineering Journal,2010,43(2):105-109.
[13]伍振志,傅志锋,王静,张胜云.浅埋松软地层开挖中管棚注浆法的加固机理及效果分析[J].岩石力学与工程学报,2005,24(6):1025-1029.WU Zhenzhi,FU Zhifeng,WANG Jing,ZHANG Shengyun.Study of Support Mechanism and Effect of Shedpipe Grouting Technology for Tunneling Construction in Shallow-Buried Soft Stratum[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(6):1025-1029.
[14]李术才,朱维申,陈卫忠,李树枕.弹塑性大位移有限元方法在软岩隧道变形预估系统研究中的应用[J].岩石力学与工程学报,2002,21(4):466-470.LI Shucai,ZHU Weishen,CHEN Weizhong,LI Shuzhen.Application of Elasto-Plastic Large Displacement Finite Element Method to the Study of Deformation Prediction of Soft Rock Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(4):466-470.