應用激光多普勒測振儀的巖塊體累計損傷評價試驗研究

杜巖; 謝謨文; 蔣宇靜; 宋紅克; 李博; 劉日成

doi:10.13374/j.issn2095-9389.2017.01.018

應用激光多普勒測振儀的巖塊體累計損傷評價試驗研究

doi: 10.13374/j.issn2095-9389.2017.01.018

杜巖^1,2,
謝謨文^1, ,,
蔣宇靜²,
宋紅克¹,
李博³,
劉日成⁴

1) 北京科技大學土木與資源工程學院, 北京 100083
2) 長崎大學工學部, 長崎 852-8521, 日本
3) 紹興文理學院山體地質災害防治協同創新中心, 紹興 312099
4) 中國礦業大學深部巖土力學與地下工程國家重點實驗室, 徐州 221116

基金項目:

國家自然科學基金資助項目（41572274，41372370）；中國博士后科學基金資助項目（2016M591078）；中央高校基本科研業務費資助項目（FRF-TP-16-014A1）；北京科技大學“創新人才培養”項目（USTB201309FX）；浙江省山體地質災害防治協同創新中心開放基金課題（PCMGH-2016-Y-02）

詳細信息

中圖分類號: TU458⁺.4
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出版歷程
- 收稿日期: 2016-04-28

Experimental study on cumulative damage assessment of rock-block using a laser Doppler vibrometer

1) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Faculty of Engineering, Nagasaki University, Nagasaki 852-8521, Japan
3) Rock Mechanics and Geohazards Center, Shaoxing University, Shaoxing 312099, China
4) State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China

摘要

摘要: 巖塊體崩塌破壞的突發性使其成為最難預防的地質災害，嚴重威脅人類的生命財產安全.邊坡巖塊體崩塌破壞多是系統不穩定導致的動力破壞，而用振動特征參數來進行安全監測和損傷評價更為有效.本文應用激光多普勒測振技術，通過固有振動頻率對危巖塊體主控結構面的黏結力損傷進行定量分析.通過改進后的極限平衡模型，得出結構面不斷劣化塊體的安全系數由原來的1.17下降到1.04，與實際破壞結果相符.試驗結果表明：固有振動頻率一方面可對危巖塊體累積損傷進行有效識別，另一方面可以為黏結力參數的合理確定提供客觀的數據支持.因此，基于固有振動頻率分析的激光多普勒測振技術可實現邊坡巖塊體的累計損傷評價，并將在未來的工程應用中發揮巨大的作用.
- 巖石力學 /
- 損傷評價 /
- 激光多普勒測振儀 /
- 固有振動頻率 /
- 黏結力
Abstract: Rock-block collapse has been a hot issue in the study of geological hazards for many years, and it is difficult to prevent because of its sudden disintegration, which is a serious threaten to human life and property safety. Rock-block collapse is caused by dynamic failure derived from system instability, so it can be more effective to apply vibration characteristic parameters in damage assessment and early warning. By using a laser Doppler vibrometer, the cohesion damage of control fissure was analyzed by natural vibration frequency in the paper. Based on the modified limit equilibrium model, the safety factor of the block with a deteriorating structural plane was calculated by the frequency, which decreased from 1.17 to 1.04, in accordance with the reality. The results show that the natural vibration frequency can effectively identify the unstable rock cumulative damage and provide objective data for reasonable determination of the cohesion. The laser Doppler vibrometer technology based on natural vibration frequency can satisfy cumulative damage evaluation of unstable rocks. It will play a significant role in engineering applications in the future.
- rock mechanics /
- damage assessment /
- laser Doppler vibrometers /
- natural vibration frequency /
- cohesion

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參考文獻(15)

[1]	Strom A L, Korup O. Extremely large rockslides and rock avalanches in the Tien Shan Mountains, Kyrgyzstan. Landslides, 2006, 3(2):125
[2]	Frayssines M, Hantz D. Modelling and back-analysing failures in steep limestone cliffs. Int J Rock Mech Min Sci, 2009, 46(7):1115
[3]	Huang R Q, Liu W H, Zhou J P, et al. Experimental field study of movement characteristics of rock blocks falling down a slope. J Earth Sci, 2010, 21(3):330
[4]	Youssef A M, Maerz N H, Al-Otaibi A A. Stability of rock slopes along Raidah escarpment road, Asir Area, Kingdom of Saudi Arabia. J Geogr Geol, 2012, 4(2):48
[5]	Royán M J, Abellán A, Jaboyedoff M, et al. Spatio-temporal analysis of rockfall pre-failure deformation using Terrestrial LiDAR. Landslides, 2014, 11(4):697
[6]	Wang X L, Frattini P, Crosta G B, et al. Uncertainty assessment in quantitative rockfall risk assessment. Landslides, 2014, 11(4):711
[7]	Stead D, Eberhardt E, Coggan J S. Developments in the characterization of complex rock slope deformation and failure using numerical modelling techniques. Eng Geol, 2006, 83(1):217
[8]	Uehan F. Development of the U-Doppler non-contact vibration measuring system for diagnosis of railway structures. Q Rep RTRI, 2008, 49(3):178
[9]	Ma G C, Kazuhide S, Hideki S, et al. Study on evaluating rock block stability by using a remotely positioned laser Doppler vibrometer. Int J Geomater, 2012, 2(2):247
[12]	Uehan F, Minoura S. Development of an aerial survey system and numerical analysis modeling software for unstable rock blocks. Q Rep RTRI, 2015, 56(3):212
[13]	Ma G C, Sawada K, Yashima A, et al. Experimental study of the applicability of the remotely positioned laser Doppler vibrometer to rock-block stability assessment. Rock Mech Rock Eng, 2015, 48(2):787
[15]	Xu N W, Dai F, Liang Z Z, et al. The dynamic evaluation of rock slope stability considering the effects of microseismic damage. Rock Mech Rock Eng, 2014, 47(2):621
[19]	Castellini P, Martarelli M, Tomasini E P. Laser Doppler vibrometry:development of advanced solutions answering to technology's needs. Mech Syst Signal Process, 2006, 20(6):1265
[20]	Siringoringo D M, Fujino Y. Noncontact operational modal analysis of structural members by laser Doppler vibrometer. Comput Aided Civ Infrastruct Eng, 2009, 24(4):249
[21]	Ju F D, Mimovich M. Modal frequency method in diagnosis of fracture damage in structures//Proceedings of the 4th International Modal Analysis Conference. Los Angeles, 1986