岩体软弱夹层的弹性模量动力测试方法

doi:10.13722/j.cnki.jrme.2014.0873

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (444 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The mechanical parameters of weak interlayer in rock mass change gradually. And on this basis， the damage degree of soft interlayer is assumed to change with quadratic curve change rule. We developed the propagation model of stress wave in soft interlayer to analyze the change law of waveform of stress wave and proposed the dynamic test method of elastic modulus of weak interlayer. The field test results indicated that the difference of calculated waveform and measured waveform to the incident side can be considered using coefficient of waveform change of stress wave. With the increase of peak damage degree，waveform change coefficient decreased firstly and then increased. The calculated waveforms to the incident side are close to the measured waveform when waveform change coefficient is lowest. And it almost linearly increased with increasing dominant frequency of wavelet. Through linear fitting，the static peak elastic modulus is computed to be 0.74 GPa. Based on the equal deformation principle，equivalent dynamic elastic modulus of soft rock strata is calculated to be 4.24 GPa. The dynamic elastic modulus of the rock strata is 4.70 GPa using wave velocity method. The testing result of wave velocity is close to the value of equivalent dynamic elastic modulus. The above analysis results indicate that the research method is reasonable.

Key words： soft rock strata elastic modulus dynamic test waveform change

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2014.0873 OR http://www.rockmech.org/EN/Y2015/V34/I09/13

[1]	刘晋南，蒋鑫，邱延峻. 软弱层特性对斜坡软弱地基路堤变形的影响[J]. 西南交通大学学报，2013，48(2)：303-309.(LIU Jinnan，JIANG Xin，QIU Yanjun. Influence of weak layer properties on deformation of embankment over sloped weak ground[J]. Journal of Southwest Jiaotong University，2013，48(2)：303-309.(in Chinese))
[2]	何满潮，薛廷河，彭延飞. 工程岩体力学参数确定方法的研究[J]. 岩石力学与工程学报，2001，20(2)：225-229.(HE Manchao，XUE Tinghe，PENG Yanfei. A new way of determining mechanical parameters of engineering rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(2)：225-229.(in Chinese))
[4]	张占荣，盛谦，杨艳霜，等. 基于现场试验的岩体变形模量尺寸效应研究[J]. 岩土力学，2010，31(9)：2 875-2 881.(ZHANG Zhanrong，SHENG Qian，YANG Yanshuang，et al. Study of size effect of rock mass deformation modulus based on in-situ test[J]. Rock and Soil Mechanics，2010，31(9)：2 875-2 881.(in Chinese)) " target="_blank">
[5]	夏开宗，陈从新，刘秀敏，等. 基于岩体波速的Hoek-Brown准则预测岩体力学参数方法及工程应用[J]. 岩石力学与工程学报，2013，32(7)：1 458-1 466.(XIA Kaizong，CHEN Congxin，LIU Xiumin，et al. Estimation of rock mass mechanical parameters based on Ultrasonic velocity of rock mass and Hoek-Brown Criterion and its application to engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(7)：1 458-1 466.(in Chinese)) " target="_blank">
[7]	胡卸文，钟沛林. 似层状结构岩体变形参数的软弱层带厚度效应[J]. 岩石力学与工程学报，2002，21(9)：1 302-1 306.(HU Xiewen，ZHONG Peilin. Effect of weak interbed thickness on deformation modulus of rock mass with quasi-lamellar structure[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(9)：1 302-1 306.(in Chinese)) " target="_blank">
[8]	宋彦辉，丛璐. 基于GSI的岩体变形模量和扰动系数估计[J]. 应用基础与工程科学学报，2014，22(1)：27-34.(SONG Yanhui，CONG Lu. Estimation of rock mass deformation modulus and degree of disturbance using GSI system[J]. Journal of Basic Science and Engineering，2014，22(1)：27-34.(in Chinese)) " target="_blank">
[9]	吴庆曾，李洪涛，杨进平. 声波检测穿透信号波形变化规律和量化的探讨[J]. 物探与化探，2012，36(1)：144-148.(WU Qingzeng，LI Hongtao，YANG Jinping. Discussion on the variation and quantification of penetrating signal waveform in acoustic wave detection[J]. Geophysical and Geochemical Exploration，2012，36(1)：144-148.(in Chinese))
[11]	樊耀新. 断层对地震子波波形影响的研究[J]. 西北地震学报，1996，18(3)：54-59.(FAN Yaoxin. Study about influence of fault on seismic wavelet form[J]. Northwestern Seismological Journal，1996，18(3)：54-59.(in Chinese)) " target="_blank">
[13]	罗松南，周正平，童桦. 具有非均匀损伤带状区域中波的传播[J]. 振动与冲击，2006，25(5)：74-78.(LUO Songnan，ZHOU Zhenping，TONG Hua. Wave propagation in an inhomogeneous damaged zone[J]. Journal of Vibration and Shock，2006，25(5)：74-78.(in Chinese)) " target="_blank">
[15]	李光煜，刘继光，谢远静. 钻孔弹模计检测断层固结灌浆效果[J]. 岩石力学与工程学报，1996，15(3)：289-293.(Li Guangyu，LIU Jiguang，XIE Yuanjing. Detection of consolidation grouting effects in faults by means of borehole jack[J]. Chinese Journal of Rock Mechanics and Engineering，1996，15(3)：289-293.(in Chinese)) " target="_blank">
[3]	贾志欣，汪小刚，赵宇飞，等. 岩石钻孔原位测试技术的应用与改进[J]. 岩石力学与工程学报，2013，32(6)：1 264-1 269.(JIA Zhixin，WANG Xiaogang，ZHAO Yufei，et al. Application and improvement of rock borehole in-situ test technology[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(6)：1 264-1 269.(in Chinese)) " target="_blank">
[6]	BARTON N. Some new Q-value correlations to assist in site characterization and tunnel design[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(2)：185-216.
[10]	谢忠球，肖宏彬，李珍玉，等. 边坡软弱层评价中全波列声波测井的理论与实验研究[J]. 中南林业科技大学学报，2010，30(8)：108-111.(XIE Zhongqiu，XIAO Hongbin1，LI Zhenyu，et al. Theory and test research of full waveform acoustic logging for slope weak layer evaluation[J]. Journal of Central South University of Forestry and Technology，2010，30(8)：108-111.(in Chinese)) " target="_blank">
[12]	赵新涛，刘东燕. 岩体软弱夹层对爆破震动信号影响的试验研究[J]. 振动与冲击，2012，31(2)：161-165.(ZHAO Xintao，LIU Dongyan. Test for impact of soft interlayer on blasting vibration signal[J]. Journal of Vibration and Shock，2012，31(2)：161-165.(in Chinese))
[16]	郑永来，周澄，黄炜，等. 动态弹性模量随频率变化的理论模型及机理[J]. 河海大学学报，1999，27(30)：84-86.(ZHENG Yonglai，ZHOU Chen，HUANG Wei，et al. Theoretical model and mechanism of dynamic modulus of elasticity with frequency change[J]. Journal of Hohai University，1999，27(30)：84-86.(in Chinese)) " target="_blank">
[14]	符文熹，尚岳全，孙红月，等. 岩体变形参数渐变取值模型及工程应用[J]. 工程地质学报，2002，10(2)：198-203.(FU Wenxi，SHANG Yuequan，SUN Hongyue，et al. Application of progressively changing rock mass deformation parameters to rock mass engineering[J]. Journal of Engineering Geology，2002，10(2)：198-203.(in Chinese))