断层影响带地应力特征及稳定性验证
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摘要
为研究分析福建某隧道两断层影响带的地应力场特征,在其隧道中部断层影响带附近两钻孔中采用水压致裂法进行了地应力测试。测试结果表明:断层影响带测试区地应力符合一般地应力分布规律,水平主应力随深度增加有增大趋势,局部裂隙导致部分测点应力值偏高或偏低;两测孔最大水平主应力方向一致,均为NNW向。该测试结果与区域构造应力场基本吻合,也接近于同区域围岩完整区地应力测试成果。文章根据该测试成果分析了该测试区的地应力特征,并采用滑动准则下限验证了两测孔所在的断层的稳定性。
To analyze the characteristics of the in-situ stress field of the two fault influence zones in a tunnel in the Fujian province,the hydraulic fracturing method was adopted in two boreholes near the fault influence zones in the tunnel middle section to measure the in-situ stress.The results show that the stress in the test area accords with the general rule of stress distribution,with horizontal principal stress increasing with depth,and local fractures resulting in higher or lower stress values regarding some test points.The maximum horizontal principal stresses in the two testing holes are in the same direction of NNW.The results are consistent with the regional tectonic stress field and are also close to results concerning the intact rock zone in the same region.Based on the test results,the characteristics of the in-situ stress of the test area were analyzed and the stability of the fault where the two testing holes lie was validated by adopting the lower limit of the sliding criterion.
To analyze the characteristics of the in-situ stress field of the two fault influence zones in a tunnel in the Fujian province,the hydraulic fracturing method was adopted in two boreholes near the fault influence zones in the tunnel middle section to measure the in-situ stress.The results show that the stress in the test area accords with the general rule of stress distribution,with horizontal principal stress increasing with depth,and local fractures resulting in higher or lower stress values regarding some test points.The maximum horizontal principal stresses in the two testing holes are in the same direction of NNW.The results are consistent with the regional tectonic stress field and are also close to results concerning the intact rock zone in the same region.Based on the test results,the characteristics of the in-situ stress of the test area were analyzed and the stability of the fault where the two testing holes lie was validated by adopting the lower limit of the sliding criterion.
引文
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[16]苏生瑞.断裂构造对地应力场的影响及其工程意义[D].成都:成都理工大学,博士论文,2001Su Shengrui.Effect of Fractures on RockStresses and Its Significance in Geological Engineering[D].Chengdu:Chengdu University of Technology,Doctorial Thesis,2001
[17]宋卫平,张宏伟.断层滑动准则和稳定性评价及构造应力场的反演[J].岩石力学与工程学报,2008,27(S2):3740-3745Song Weiping,Zhang Hongwei.Assessment on Faults Slide Criterion and Stabilityand Back-analysis of Tectonic Stress Field[J].Chi-nese Journal of Rock Mechanics and Engineering,2008,27(S2):3740-3745
[18]王学潮,杨维九.南水北调西线一期工程的深埋长隧洞[J].现代隧道技术,2004,(z2):136-139Wang Xuechao,Yang Weijiu.Deep-buried Long Hydraulic Tunnel in the Western Line of Firststage ProjectofSouth-to-north Wa-ter Diversion[J].Modern Tunnelling Technology,2004,(Supp.2):136-139
[19]张俊儒,仇文革.地质构造和地形对N.Barton岩质评定系数Q值的影响分析[J].现代隧道技术,2011,48(6):38-42Zhang Junru,Qiu Wenge.Analysis of the Effects of Geologic Structures and Topographical Features on the Rock Assessment Coeffi-cient Q Proposed by N.Barton[J].Modern Tunnelling Technology,2011,48(6):38-42
[2]苏生瑞,朱合华,王士天.断裂物理力学性质对其附近地应力场的影响[J].西北大学学报,2002,32(6):655-658Su Shengrui,Zhu Hehua,Wang Shitian.The Effect of Fracture Properties on Stress Field in the Vicinity of a Fracture[J].Journal of Northwest University(Natural Science Edition),2002,32(6):653-658
[3]贾晓亮,崔洪庆,张子敏.断层端部地应力影响因素数值分析[J].煤田地质与勘探,2010,38(4):47-51Jia Xiaoliang,Cui Hongqing,Zhang Zimin.Numerical Simulation of Geostatic Stress Influening Factor at the End of Fault[J].Coal Geol-ogy&Exploration,2010,38(4):47-51
[4]刘允芳.岩体地应力与工程建设[M].武汉:湖北科学技术出版社,2000Liu Yunfang.RockMassGeostress and Engineering Construction[M].Wuhan:Hubei Science and Technology Press,2000
[5]李方全.地应力测量[J].岩石力学与工程学报,1985,4(1):95-111LiFangquan.Geostress Measurement[J].Chinese Journal of RockMechanicsand Engineering,1985,4(1):95-111
[6]沈海超,程远方,王京印,等.断层对地应力场影响的有限元研究[J].大庆石油地质与开发,2007,26(2):34-37Shen Haichao,Cheng Yuanfang,Wang Jingyin,et al.Study of Finite Element on Effects of Faults onGround Stress Field[J].Petroleum Geology&Oilfield Development in Daqing,2007,26(2):34-37
[7]尹健民,罗超文,艾凯.某隧道区地应力测量与岩爆分析[J].岩土力学,2003,24(增1):28-30Yin Jianmin,Luo Chaowen,Ai Kai.Geostress Determination and Rockburst Analysis for an Expressway Tunnel[J].Rock and Soil Me-chanics,2003,24(Supp.1):28-30
[8]李宏,安其美,谢富仁.福建沿海边缘陆域的原地应力测量研究[J].地震学报,2005,27(5):508-514Li Hong,An Qimei,Xie Furen.Study on In-situ Stress Measurement around Coastal Marginal Land in Fujian[J].ACTA Seismologica Sinica,2005,27(5):508-514
[9]史粦华,周峥嵘,鲍挺,等.福建及沿海地区地震活动力源探讨[J].地震,2006,26(2):104-112Shi Linhua,Zhou Zhengrong,Bao Ting,et al.Discussion of Force Source of Seismic Activity in Fujian and Its Coastal Area[J].Earth-quake,2006,26(2):104-112
[10]尹健民,陈礼伟,钟作武,等.某高速公路隧道区水压致裂地应力测量与分析[J].岩石力学与工程学报,2001,20(z1):1827-1830Yin Jianmin,Chen Liwei,Zhong Zuowu,et al.Measurement and Interpretation on In-situ Stress with Hydro-fracturing in Highway Tunnel Site[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(z1):1827-1830
[11]Zoback,M.D.,J.H.Healy.Friction,Faulting and In-situ Stress[J].Annalcs Geophysicac,1984,2(6)
[12]Byerlee J.D.Friction of Rocks[J].Pure and Applied Geophysics,1978,116(4,5):615-626
[13]Releigh C.B.,Healy J.H.,Bredehoeft J.D.Faulting and Crustal Stress at Rangely,Colorado[J].Geophsical Monograph Series,1972,16:275-284
[14]张伯崇,马元春.岩石摩擦性状的试验和断层滑动准则的讨论[A].国家地震局地壳应力研究所.地壳构造与地壳应力文集[C].北京:地震出版社,1987:136-145Zhang Bochong,Ma Yuanchun.The Experiments on Frictional Behaviors of Rocks and a Discussion on Criterion of Fault Slide[A].Institute of Crustal DynamicsofState Seismological Bureau.Proc.of the1st Crustal Tectonic and Stress[C].Beijing:Earthquake Press,1987:136-145
[15]马元春,刘长义,王福江.依据滑动准则、原地应力测量讨论红河断裂的北段地震活动性[A].国家地震局地壳应力研究所.地壳构造与地壳应力文集[C].北京:地震出版社,1997:154-160Ma Yuanchun,Liu Changyi,Wang Fujiang.A Discussion on the Seismic Activity of the Northern Section of the Honghe Fault in Ac-cordance of the Slide Criterion and In-situ Stresses[A].Institute of Crustal Dynamics of State Seismological Bureau.Proc.of the10th Crustal Tectonic and Stress[C].Beijing:Earthquake Press,1997:154-160
[16]苏生瑞.断裂构造对地应力场的影响及其工程意义[D].成都:成都理工大学,博士论文,2001Su Shengrui.Effect of Fractures on RockStresses and Its Significance in Geological Engineering[D].Chengdu:Chengdu University of Technology,Doctorial Thesis,2001
[17]宋卫平,张宏伟.断层滑动准则和稳定性评价及构造应力场的反演[J].岩石力学与工程学报,2008,27(S2):3740-3745Song Weiping,Zhang Hongwei.Assessment on Faults Slide Criterion and Stabilityand Back-analysis of Tectonic Stress Field[J].Chi-nese Journal of Rock Mechanics and Engineering,2008,27(S2):3740-3745
[18]王学潮,杨维九.南水北调西线一期工程的深埋长隧洞[J].现代隧道技术,2004,(z2):136-139Wang Xuechao,Yang Weijiu.Deep-buried Long Hydraulic Tunnel in the Western Line of Firststage ProjectofSouth-to-north Wa-ter Diversion[J].Modern Tunnelling Technology,2004,(Supp.2):136-139
[19]张俊儒,仇文革.地质构造和地形对N.Barton岩质评定系数Q值的影响分析[J].现代隧道技术,2011,48(6):38-42Zhang Junru,Qiu Wenge.Analysis of the Effects of Geologic Structures and Topographical Features on the Rock Assessment Coeffi-cient Q Proposed by N.Barton[J].Modern Tunnelling Technology,2011,48(6):38-42
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