软弱夹层强度参数的室内模拟
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摘要
软弱夹层影响边坡稳定和爆破效果。特定软弱夹层的含水率和颗粒组成随着气候变化和时间推移会有所变化。通过对张坝沟石灰石矿山软弱夹层土样的室内模拟剪切试验,探讨泥质软弱夹层的内摩擦角与其颗粒组分和含水率之间的定量关系,建立了该软弱夹层的内摩擦角与其含水率和粗颗粒含量的相关方程。在此基础上进一步分析了不同粉砂粒含量的土在相同含水率时的摩擦角变化规律及其原因。
Weak intercalation usually has a bad impact on the stability of rock slope, furthermore, some changes will happen to the granule composing and water ratio along with time passing and the climate changing, for special weak intercalation. A correlative equation of the friction angle, water ratio and the proportion of coarse granule was founded and the range of its application was indicated according to the laboratory simulation shear testing of Zhangbagou Limestone Mine' s weak intercalation. Moreover, the friction angle' s change rule and the reasons of different granules were analyzed and pointed out under the same water ratio.
Weak intercalation usually has a bad impact on the stability of rock slope, furthermore, some changes will happen to the granule composing and water ratio along with time passing and the climate changing, for special weak intercalation. A correlative equation of the friction angle, water ratio and the proportion of coarse granule was founded and the range of its application was indicated according to the laboratory simulation shear testing of Zhangbagou Limestone Mine' s weak intercalation. Moreover, the friction angle' s change rule and the reasons of different granules were analyzed and pointed out under the same water ratio.
引文
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[8]符文熹,聂德新,尚岳全,等．软弱夹层工程地质性质的室内仿真研究[J]．浙江大学学报(工学版),2003,1(1):1-4．FU Wen-xi, NIE De-xin, SHANG Yue-quan, et al. Study on Laboratory Simulation of the Engineer Properties of Weak Interci lation [J]. Journal of Zhejiang University (Engineering Science) , 2003 ,1 (1) :1～4. (in Chinese)
[9]唐良琴．软弱夹层粒度成分与强度参数的关系研究[J]．重庆交通学院学报,2005,4(2):94-114．TANG Liang-qin. The Relational Study between Granulometric Composition and Strength Parameter of Weak Intercalated Layers [J]. Journal of Chongqing Jiaotong University, 2005,4(2) :94 -114. (in Chinese)
[2]刘小丽,周德培．岩土边坡系统稳定性评价初探．岩石力学与工程学报,2002,21(9):1378-1382．LIU Xiao-li, ZHOU De-pei. Stability Evaluation of Rockmass Slope[ J]. Chinese Journal of Rock Mechanics and Engineering, 2002,21 (9): 1378 -1382. (in Chinese)
[3]田文高,柳絮,毛学农,等．西科花园斜坡区稳定性研究[J]．西南科技大学学报,2005,20(3):37-40．TIAN Wen-gao, LIU Xu , MAO Xue-nong, et al. A Research on the Slope Stability at Xike Garden[J]. Journal of Southwest U-niversity of Science and Technology, 2005,20(3) :37～40. (in Chinese)
[4] Hock E. , Wood D. , Shah S. A Modified Hoek-Brown Criterion for Jointed Roclunass[J]. Proceedings of a Symposium of the International Society of Rock Mechanics on Rock Characterization EUROCK92, 1992, 209～214.
[5]陈国兴,陈继华．软弱土层的厚度及埋深对深厚软弱场地地震效应的影响[J]．世界地震工程,2004,9(3):66-72．CHEN Guo-xin, CHEN Ji-hua. The Effect of Depth and Thickness of Soft Soil Layer on Earthquake Response for Deep Soft Sites [J]. World Earthquake Engineering, 2004,9(3) :66～72. (in Chinese)
[6]赵坚,蔡军刚,赵晓豹,等．弹性纵波在具有非线性法向变形本构关系的节理处的传播特性[J]．岩石力学与工程学报, 2003,22(1):9～17. ZHAO Jian, CAI Jun-gang, ZHAO Xiao-bao, et al. Transmission of Elastic P-waves Across Single Fracture with Nonlinear Normal Deformation Behavior[J]. Chinese Journal of Rock Mechanics and Engineering, 2003,22 (1) :9 -17. (in Chinese)
[7]范留明,闫娜,李宁．薄弹性软弱夹层的动力响应模型[J]．岩石力学与工程学报,2006,1(1):88-92．FAN Liu-ming, YAN Na, LI Ning. Dynamic Response Model for Thin Soft Interlayer Considering Interbedded Reflecting Waves [J]. Chinese Journal of Rock Mechanics and Engineering, 2006,1(1): 88-92. ( in Chinese)
[8]符文熹,聂德新,尚岳全,等．软弱夹层工程地质性质的室内仿真研究[J]．浙江大学学报(工学版),2003,1(1):1-4．FU Wen-xi, NIE De-xin, SHANG Yue-quan, et al. Study on Laboratory Simulation of the Engineer Properties of Weak Interci lation [J]. Journal of Zhejiang University (Engineering Science) , 2003 ,1 (1) :1～4. (in Chinese)
[9]唐良琴．软弱夹层粒度成分与强度参数的关系研究[J]．重庆交通学院学报,2005,4(2):94-114．TANG Liang-qin. The Relational Study between Granulometric Composition and Strength Parameter of Weak Intercalated Layers [J]. Journal of Chongqing Jiaotong University, 2005,4(2) :94 -114. (in Chinese)
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