壁后注浆对盾构隧道管片及地表变形的影响分析
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摘要
地下工程质量不仅包括成型构建空间尺寸、结构强度、连接节点质量等常规质量问题,还包括施工对环境的影响问题。地下工程质量事故很难像地面结构进行施工过程控制、事后处理,必须在施工前分析、确定施工工艺参数,施工中控制、调整工艺参数,最大程度降低对环境影响,确保工程质量。本文以合肥地铁长江西路段某区间隧道施工工程为背景,建立了模拟隧道开挖的三维力学模型,通过软件进行数值模拟,分析盾构施工中注浆对地表及管片变形的影响,并依据地表沉降和管片变形调整注浆压力。
It is unavoidable that shield tunneling and surface deformation will occur during the shield construction process. According to the construction of a section of a certain tunnel in the Changjiang section of the Hefei subway,a three-dimensional mechanical model of the tunnel excavation is established in this paper. The numerical simulation using MIDAS(GTS) software is carried out to analyze the influence of grouting on the deformation of the surface and the segments in the shield construction. The results show that grouting has a certain influence on the deformation of the segment and the surface and needs to be controlled during the construction process.
It is unavoidable that shield tunneling and surface deformation will occur during the shield construction process. According to the construction of a section of a certain tunnel in the Changjiang section of the Hefei subway,a three-dimensional mechanical model of the tunnel excavation is established in this paper. The numerical simulation using MIDAS(GTS) software is carried out to analyze the influence of grouting on the deformation of the surface and the segments in the shield construction. The results show that grouting has a certain influence on the deformation of the segment and the surface and needs to be controlled during the construction process.
引文
[1]李曙光.EPB盾构法隧道施工引起的地表沉降分析与数值模拟[D].长沙:中南大学,2006.
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[4]邱明明,姜安龙.城市地铁盾构施工地层变形三维数值模拟分析[J].防灾减灾工程学报,2014,34(2):161-167.
[5]于宁,朱合华.盾构隧道施工地表变形分析与三维有限元模拟[J].岩土力学,2004,25(8):1330-1334.
[6]孙钧,袁金荣.盾构施工扰动与地层移动及其智能神经网络预测[J].岩土工程学报,2001,23(3):261-267.
[7]张恒,陈寿根,邓稀肥.盾构法施工对地表及桥梁桩基的影响分析[J].地下空间与工程学报,2010,7(3):552-557.
[8]张志强,何川,佘才高.南京地铁盾构掘进施工的三维有限元仿真分析[J].铁道学报,2005,27(1):84-89.
[9]王国才,马达君,杨阳.软土地层中地铁盾构施工引起地表沉降的三维有限元分析[J].岩土工程学报,2011,33(1):266-270.
[10]冯宏朝,高锋,王少鹏.注浆压力对盾构隧道管片变形及受力特性的影响研究[J].山西建筑,2016,42(25):162-163.
[2]Lee K M,Rowe R K,Lo L Y.Subsidence owing to tunneling.I.Estimating the gap parameter[J].Can.Geotech.J.,1992,29:929-940.
[3]童学军,岳鹏飞,刘重庆.盾构施工引起地表沉降的数值计算与实例分析[J].兰州交通大学学报,2011,30(1):86-89.
[4]邱明明,姜安龙.城市地铁盾构施工地层变形三维数值模拟分析[J].防灾减灾工程学报,2014,34(2):161-167.
[5]于宁,朱合华.盾构隧道施工地表变形分析与三维有限元模拟[J].岩土力学,2004,25(8):1330-1334.
[6]孙钧,袁金荣.盾构施工扰动与地层移动及其智能神经网络预测[J].岩土工程学报,2001,23(3):261-267.
[7]张恒,陈寿根,邓稀肥.盾构法施工对地表及桥梁桩基的影响分析[J].地下空间与工程学报,2010,7(3):552-557.
[8]张志强,何川,佘才高.南京地铁盾构掘进施工的三维有限元仿真分析[J].铁道学报,2005,27(1):84-89.
[9]王国才,马达君,杨阳.软土地层中地铁盾构施工引起地表沉降的三维有限元分析[J].岩土工程学报,2011,33(1):266-270.
[10]冯宏朝,高锋,王少鹏.注浆压力对盾构隧道管片变形及受力特性的影响研究[J].山西建筑,2016,42(25):162-163.