基于Midas模型下考虑构造应力场深埋隧道围岩稳定性研究
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摘要
地应力是存在于地壳中的应力,由岩石形变而引起的介质内部单位面积上的作用力。地应力作为地下构筑物的主要影响因素,在构造应力强烈的地区开挖建设,由于洞壁成为自由表面容易变形,使洞体逐渐缩小或造成坍塌,特别在深埋隧道工程中要考虑其对开挖后围岩的影响,针对性的采取应对措施,保障深埋隧道围岩的长期稳定性。传统方法在面对其复杂的地下环境,均有局限性,适用范围狭窄,笔者通过水压致裂法测定岩层的地应力,结合Midas模型模拟深埋隧道围岩和支护结构,对其受力、变形特点进行分析,探索其分布规律,相互影响,为今后类似工程提供参考借鉴。
Ground stress is the force acting on the unit area of a medium caused by rock deformation in the presence of stress in the earth's crust. As the main influence factor of underground structures,the ground stress is excavated in the area with strong tectonic stress. Because the wall is easily deformed as a free surface,the cave body gradually reduces or causes collapse. Especially in the deep buried tunnel project,it should consider its influence on the surrounding rock after the excavation,and take measures to ensure the depth of the excavation. The long-term stability of the surrounding rock of buried tunnel. In the face of the complex underground environment,the traditional method has the limitation and narrow scope of application. Through the water pressure cracking method,we measure the ground stress of the rock stratum,combine with the Midas model to simulate the surrounding rock and supporting structure of the deep buried tunnel,analyze the stress and deformation characteristics of the deep buried tunnel,and explore the distribution law of its distribution and influence on each other to provide reference for similar projects in the future.
Ground stress is the force acting on the unit area of a medium caused by rock deformation in the presence of stress in the earth's crust. As the main influence factor of underground structures,the ground stress is excavated in the area with strong tectonic stress. Because the wall is easily deformed as a free surface,the cave body gradually reduces or causes collapse. Especially in the deep buried tunnel project,it should consider its influence on the surrounding rock after the excavation,and take measures to ensure the depth of the excavation. The long-term stability of the surrounding rock of buried tunnel. In the face of the complex underground environment,the traditional method has the limitation and narrow scope of application. Through the water pressure cracking method,we measure the ground stress of the rock stratum,combine with the Midas model to simulate the surrounding rock and supporting structure of the deep buried tunnel,analyze the stress and deformation characteristics of the deep buried tunnel,and explore the distribution law of its distribution and influence on each other to provide reference for similar projects in the future.
引文
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[4]陈真才.软弱围岩大断面隧道结构稳定性研究[D].西安:西安工业大学,2016.
[5]陈坤城,张巍,黄立财.基于MIDAS/GTS的高压隧洞渗流场与应力场耦合分析[J].广东水利水电,2016(4):22-25.
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[12]张琦.京张城际铁路八达岭地下车站水压致裂地应力测量及施工方案优化[D].北京:北京交通大学,2010.
[13]孔飚.京张城际铁路八达岭地下车站结构优化研究[D].北京:北京交通大学,2010.
[14]魏博.大跨度高边墙地下洞室设计施工关键技术研究[D].北京:北京交通大学,2010.
[15]高广臣.青岛市地下街逆作施工过程及对周边建筑影响分析[D].哈尔滨:哈尔滨工业大学,2010.
[16]刘波.地铁隧道围岩监测与有限元模拟[D].阜新:辽宁工程技术大学,2009.
[2]付成华,汪卫明,陈胜宏.溪洛渡水电站坝区初始地应力场反演分析研究[J]岩石力学与工程学报,2006,25(11):2305-2312.
[3]李明亮.高地应力条件下的隧道围岩松动圈分布规律研究[D].西安:西安工业大学,2017.
[4]陈真才.软弱围岩大断面隧道结构稳定性研究[D].西安:西安工业大学,2016.
[5]陈坤城,张巍,黄立财.基于MIDAS/GTS的高压隧洞渗流场与应力场耦合分析[J].广东水利水电,2016(4):22-25.
[6]吴开健.高地应力条件下软岩隧道的变形分析及控制研究[D].广州:华南理工大学,2016.
[7]邹旭颖.大断面煤巷锚杆强力支护技术研究[D].阜新:辽宁工程技术大学,2013.
[8]曾艳.西安地铁二号线会展中心~三爻区间隧道施工现场监测及数值模拟[D].西安:西安科技大学,2012.
[9]曹天书.基于隧道位移量测的围岩参数反分析[D].武汉:武汉理工大学,2012.
[10]金春福.地下大跨度新管幕结构体系施工力学性能研究[D].大连:大连理工大学,2012.
[11]林业.开阳磷矿深部高地应力软岩巷道支护技术研究[D].长沙:中南大学,2011.
[12]张琦.京张城际铁路八达岭地下车站水压致裂地应力测量及施工方案优化[D].北京:北京交通大学,2010.
[13]孔飚.京张城际铁路八达岭地下车站结构优化研究[D].北京:北京交通大学,2010.
[14]魏博.大跨度高边墙地下洞室设计施工关键技术研究[D].北京:北京交通大学,2010.
[15]高广臣.青岛市地下街逆作施工过程及对周边建筑影响分析[D].哈尔滨:哈尔滨工业大学,2010.
[16]刘波.地铁隧道围岩监测与有限元模拟[D].阜新:辽宁工程技术大学,2009.