基于尖点突变理论和MF-DFA法的隧道大变形监测
|
摘要
高地应力软岩隧道发生大变形具有必然性,严重影响施工安全,对其稳定性进行评价并判断变形趋势可为工程施工提供一定的参考,具有很强的现实意义。以成兰铁路松潘隧道为例,利用尖点突变理论和多重分形去趋势波动分析法(MF-DFA)构建了高地应力软岩隧道大变形的稳定性及变形趋势判断模型,并进行变形预测。结果表明:尖点突变理论能有效评价隧道大变形的稳定性;松潘隧道目前处于稳定状态,但不同阶段的稳定性具有差异,且隧道稳定性不仅与累计变形量相关,也与变形曲线的增长过程相关;同时,MF-DFA分析得出隧道大变形具有多重分形特征,且具正向增长趋势,但趋势性较小。该方法为隧道大变形规律研究提供了一种新的思路,可为工程设计施工人员提供参考。
The occurrence of large deformation in soft rock tunnel with high ground stress is inevitable,which seriously affects the construction safety. Evaluating its stability and judging the deformation trend can provide a certain reference for construction.Taking Songpan tunnel on the Chengdu-Lanzhou railway as an example,the stability and deformation trend judgement model for soft rock tunnel with high ground stress was constructed by using cusp catastrophe theory and Multifractal Detrended Fluctuation Analysis method( MF-DFA) to predict deformation. The results showed that the cusp catastrophe theory can effectively evaluate the stability of large deformation tunnel. Songpan tunnel is in a stable state at present,but the tunnel stability state varies in different stages,and its stability is not only related to the cumulative deformation,but also to the growth process of deformation curve. At the same time,MF-DFA analysis showed that the large deformation of tunnel has multifractal characteristics,and has a small positive growth trend. This method provides a new way for researching the large deformation law of tunnels and can be a reference for engineering design and construction personnel.
The occurrence of large deformation in soft rock tunnel with high ground stress is inevitable,which seriously affects the construction safety. Evaluating its stability and judging the deformation trend can provide a certain reference for construction.Taking Songpan tunnel on the Chengdu-Lanzhou railway as an example,the stability and deformation trend judgement model for soft rock tunnel with high ground stress was constructed by using cusp catastrophe theory and Multifractal Detrended Fluctuation Analysis method( MF-DFA) to predict deformation. The results showed that the cusp catastrophe theory can effectively evaluate the stability of large deformation tunnel. Songpan tunnel is in a stable state at present,but the tunnel stability state varies in different stages,and its stability is not only related to the cumulative deformation,but also to the growth process of deformation curve. At the same time,MF-DFA analysis showed that the large deformation of tunnel has multifractal characteristics,and has a small positive growth trend. This method provides a new way for researching the large deformation law of tunnels and can be a reference for engineering design and construction personnel.
引文
[1]晏长根,罗鑫,王凯,等.深埋软岩大变形偏压公路隧道3层支护结构受力变形特征[J].中国公路学报,2016,29(2):98-107.
[2]李国良,刘志春,朱永全.兰渝铁路高地应力软岩隧道挤压大变形规律及分级标准研究[J].现代隧道技术,2015,52(1):62-68.
[3]王开洋,尚彦军,何万通,等.深埋公路隧道围岩大变形预测研究[J].地下空间与工程学报,2015,11(5):1164-1174.
[4]李守刚.关山特长隧道高地应力下硬岩大变形规律研究[J].人民长江,2015,46(12):48-52.
[5]任庆国.基于重标极差法和神经网络的隧道变形趋势判断[J].人民长江,2017,48(16):54-59.
[6]赵亢,杨其新,蒋雅君.关垭子隧道软弱围岩大变形机理分析[J].铁道标准设计,2015,59(10):114-118.
[7]高发征.弱胶结软岩隧道大变形治理与支护对策研究[J].公路工程,2016,41(6):135-140.
[8]王兴彬.不同工法在炭质片岩隧道大变形控制中的应用研究[J].隧道建设,2017,37(S1):121-127.
[9]徐松.牡绥铁路兴源隧道软岩大变形控制技术[J].隧道建设,2016,36(8):997-1003.
[10]钟亮,刘珺洁,孙建云,等.河道水沙变化过程的多重分形研究—以长江重庆河段为例[J].泥沙研究,2016(5):66-73.
[11]韦武昌,苏莹,聂兵兵.MF-DMA方法在某双曲拱坝变形监测中的应用[J].水电能源科学,2016,34(5):85-87.
[12]吴庆发.基于尖点突变理论的围岩稳定性分析[J].筑路机械与施工机械化,2017,34(2):67-70.
[13]徐海清,陈亮,王炜,等.软岩隧道围岩塌方的尖点突变预测分析[J].铁道工程学报,2016,33(11):97-101.
[14]周绍江.突变理论在环境影响评价中的应用[J].人民长江,2003,34(2):52-54.
[15]刘炜,陈剑平,占洁伟.基于突变理论的清香坪泥石流沟危险性评价[J].人民长江,2016,47(S1):100-103.
[16]冯骋,宋鑫华.基于燕尾突变模型的土质边坡稳定性研究[J].人民长江,2015,46(12):53-56.
[17]赵延林,吴启红,王卫军,等.基于突变理论的采空区重叠顶板稳定性强度折减法及应用[J].岩石力学与工程学报,2010,29(7):1424-1434.
[18]胡江,苏怀智,马福恒,等.MF-DFA在大坝安全监测序列分析和整体性态识别中的应用[J].水利水电科技进展,2014,34(3):50-55.
[19]王松林,邵晨飞,朱蓓,等.滑动窗口MF-DFA方法在大坝变形监测中的运用[J].三峡大学学报:自然科学版,2012,34(2):7-10.
[20]邬长福,涂志刚,万佳威,等.基于R/S分析与V/S分析的滑坡变形趋势判断及稳定性研究[J].水电能源科学,2015,33(1):111-114.(编辑:胡旭东)
[2]李国良,刘志春,朱永全.兰渝铁路高地应力软岩隧道挤压大变形规律及分级标准研究[J].现代隧道技术,2015,52(1):62-68.
[3]王开洋,尚彦军,何万通,等.深埋公路隧道围岩大变形预测研究[J].地下空间与工程学报,2015,11(5):1164-1174.
[4]李守刚.关山特长隧道高地应力下硬岩大变形规律研究[J].人民长江,2015,46(12):48-52.
[5]任庆国.基于重标极差法和神经网络的隧道变形趋势判断[J].人民长江,2017,48(16):54-59.
[6]赵亢,杨其新,蒋雅君.关垭子隧道软弱围岩大变形机理分析[J].铁道标准设计,2015,59(10):114-118.
[7]高发征.弱胶结软岩隧道大变形治理与支护对策研究[J].公路工程,2016,41(6):135-140.
[8]王兴彬.不同工法在炭质片岩隧道大变形控制中的应用研究[J].隧道建设,2017,37(S1):121-127.
[9]徐松.牡绥铁路兴源隧道软岩大变形控制技术[J].隧道建设,2016,36(8):997-1003.
[10]钟亮,刘珺洁,孙建云,等.河道水沙变化过程的多重分形研究—以长江重庆河段为例[J].泥沙研究,2016(5):66-73.
[11]韦武昌,苏莹,聂兵兵.MF-DMA方法在某双曲拱坝变形监测中的应用[J].水电能源科学,2016,34(5):85-87.
[12]吴庆发.基于尖点突变理论的围岩稳定性分析[J].筑路机械与施工机械化,2017,34(2):67-70.
[13]徐海清,陈亮,王炜,等.软岩隧道围岩塌方的尖点突变预测分析[J].铁道工程学报,2016,33(11):97-101.
[14]周绍江.突变理论在环境影响评价中的应用[J].人民长江,2003,34(2):52-54.
[15]刘炜,陈剑平,占洁伟.基于突变理论的清香坪泥石流沟危险性评价[J].人民长江,2016,47(S1):100-103.
[16]冯骋,宋鑫华.基于燕尾突变模型的土质边坡稳定性研究[J].人民长江,2015,46(12):53-56.
[17]赵延林,吴启红,王卫军,等.基于突变理论的采空区重叠顶板稳定性强度折减法及应用[J].岩石力学与工程学报,2010,29(7):1424-1434.
[18]胡江,苏怀智,马福恒,等.MF-DFA在大坝安全监测序列分析和整体性态识别中的应用[J].水利水电科技进展,2014,34(3):50-55.
[19]王松林,邵晨飞,朱蓓,等.滑动窗口MF-DFA方法在大坝变形监测中的运用[J].三峡大学学报:自然科学版,2012,34(2):7-10.
[20]邬长福,涂志刚,万佳威,等.基于R/S分析与V/S分析的滑坡变形趋势判断及稳定性研究[J].水电能源科学,2015,33(1):111-114.(编辑:胡旭东)