基于含石量指标的土石混合体非线性破坏强度准则

doi:10.13722/j.cnki.jrme.2020.0854

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摘要第四纪土石混合体作为典型的多相岩土地质材料，内部组分含量的占比控制着混合体的结构特征，决定了宏观强度的主要来源。含石量增加一方面导致低强度土石接触面出现，但同时也改变了内部力系传递路径，代替低强度土体承担外力作用。目前关于土石混合体经验性强度理论的研究相对较少，本文以密实状态混合体为主要研究对象，从“土–石–界面”三者协同作用对混合体强度的影响角度进行分析。根据中高含石量混合体与破裂岩体在力学特征和组构成分上的相似性，参考广义Hoek-Brown非线性强度准则的计算格式和经验参数的选取思路，建立可以表述土石混合体力学特征的非线性强度准则。以块石含量、土石接触面强度及组分力学特性为混合体强度的主要影响因素，利用含石量和混合体单轴抗压强度，并借助特征参数A、扰动参数、地质参数G等参数指标对上述影响因素进行描述。基于收集到的国内外土石混合体大型三轴试验数据，给出了经验参数的定量表达方法，并对强度准则的准确性进行了验证。结果表明，本文提出的非线性强度准则可以描述不同含石量土石混合体具有的非线性强度特征；根据经验参数获取方法的不同，将预测最大主应力值分为试验拟合值和公式拟合值，其中试验拟合值计算精度更高，与试验实测值相比计算误差更小，但2种方法得到的预测值与试验值均具有较高的关联性，决定系数均大于0.9；本文提出的非线性强度准则在中高含石量范围内准确度更高，低含石量(30%)处的准确度明显劣于Mohr-Coulomb(M-C)准则。研究结果可为工程实践中土石混合体强度预测的提供计算参考。

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	张振平1
	2
	付晓东1
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	盛谦1
	2
	殷大伟3
	4
	宋顶峰3
	4
	杜宇翔5

关键词 ：土力学, 土石混合体, Hoek-Brown准则, 非线性强度准则, 含石量, 大型三轴试验

Abstract：The composition contents of the quaternary soil-rock mixture(SRM) have a significant impact on the structural characteristics and play a decisive role in the strength of the typical two-phase geo-material. The increase of the rock block proportion(RBP) leads to the emergence of the soil-rock interfaces with a weak strength，and in the meanwhile，the added rock blocks change the transmission path of the force system and are more capable to bear force effect than the soil matrix. The studies on the empirical strength theory of SRM are still limited. This study picks the SRM in the density state as the research target，and pays attention to the influence of the soil-rock-interface system on the strength. Base on the similarities in mechanical properties and constituent structures between the medium and high RBPs and fractured rock masses，the calculation format and empirical parameter selection method of Hoek-Brown criterion were considered to build the non-linear strength criterion of SRM for describing the mechanical characteristics of the material. The RBP，the unconfined compression strength，the characteristic parameter A，the disturbed parameter and the geological parameter G were chosen to reflect the impacts of the RBP，the strength of the soil-rock interface and the mechanical properties of the compositions on the SRM strength. The fitting formulae of the experience parameters ms and a were promoted based on the large triaxial test data collected from previous studies，and the accuracy of the established criterion was also proved using the test data in the database. The results show that the non-linear criterion proposed in this study can describe the non-linear strength characteristics of SRM with various rock block proportions. The predicted major principle stress values are divided into test fitting value and formula fitting value according to the approaches for obtaining the experience parameters of the proposed criterion. The test fitting values are much more precise than the formula fitting values compared with the test results. The predicted values of the two methods are consistent with the test results with coefficients of correlation greater than 0.9. The non-linear criterion developed in this study is much more suitable and accurate for the SRM with a higher rock block proportion，while the accuracy is relatively poor for the SRM with a low proportion in contrast with the Mohr-Coulomb criterion. The research results can provide calculation references for the strength estimation of natural SRM in engineering practice.

Key words： soil mechanics soil-rock mixture Hoek-Brown criterion non-linear strength criterion rock block proportion large scale triaxial test

引用本文:

张振平1，2，付晓东1，2，盛谦1，2，殷大伟3，4，宋顶峰3，4，杜宇翔5. 基于含石量指标的土石混合体非线性破坏强度准则[J]. 岩石力学与工程学报, 2021, 40(8): 1672-1686.
ZHANG Zhenping1，2，FU Xiaodong1，2，SHENG Qian1，2，YIN Dawei3，4，SONG Dingfeng3，4，DU Yuxiang5. A non-linear ultimate strength criterion for soil-rock mixture based on rock block proportion. , 2021, 40(8): 1672-1686.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0854 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I8/1672

[52]	KALENDER A，SONMEZ H，MEDLEY E，et al. An approach to predicting the overall strengths of unwelded bimrocks and bimsoils[J]. Engineering Geology，2014，183：65-79.
[48]	BROWN E T，HOEK E. Underground excavations in rock[M]. London：Institution of Mining and Metallurgy，1980：527.
[62]	CHANG K T，CHENG M C. Estimation of the shear strength of gravel deposits based on field investigated geological factors[J]. Engineering Geology，2014，171：70-80.
[1]	徐文杰，胡瑞林. 土石混合体概念，分类及意义[J]. 水文地质工程地质，2009，36(4)：50-56.(XU Wenjie，HU Ruilin. Conception，classification and significations of soil-rock mixture[J]. Hydrogeology and Engineering Geology，2009，36(4)：50-56.(in Chinese))
[54]	LINDQUIST E S. The strength and deformation properties of Melange[Ph. D. Thesis][D]. Berkeley：University of California，1994.
[6]	黄家华. 四川理县桃坪冰水堆积体强度特性研究[硕士学位论文][D]. 成都：成都理工大学，2016.(HUANG Jiahua. Study on the strength characteristics of glacial deposit body in Taoping，Li County，Sichuan Province[M. S. Thesis][D]. Chengdu：Chengdu University of Technology，2016.(in Chinese))
[4]	夏加国，胡瑞林，祁生文，等. 含超径颗粒土石混合体的大型三轴剪切试验研究[J]. 岩石力学与工程学报，2017，36(8)：2 031-2 039. (XIA Jiaguo，HU Ruilin，Qi Shengwen，et al. Large-scale triaxial shear testing of soil rock mixtures containing oversized particles[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(8)：2 031-2 039. (in Chinese))
[8]	江洎洧，潘家军，程展林，等. 基于大型真三轴试验的粗粒料强度特性研究[J]. 岩土工程学报，2018，40(增2)：32-36.(JIANG Jiwei，PAN Jiajun，CHENG Zhanlin，et al. Large-scale true triaxial tests on strength characteristics of coarse-grained soils[J]. Chinese Journal of Geotechnical Engineering，2018，40(Supp.2)：32-36.(in Chinese))
[10]	施维成，朱俊高，刘汉龙. 中主应力对砾石料变形和强度的影响[J]. 岩土工程学报，2008，30(10)：1 449-1 453.(SHI Weicheng，ZHU Jungao，LIU Hanlong. Influence of intermediate principal stress on deformation and strength of gravel[J]. Chinese Journal of Geotechnical Engineering，2008，30(10)：1 449-1 453.(in Chinese))
[11]	李修磊，李起伟，杨超，等. 基于三轴极限峰值偏应力的岩石非线性破坏强度准则[J]. 煤炭学报，2019，44(增2)：517-525.(LI Xiulei，LI Qiwei，YANG Chao，et al. A nonlinear failure strength criterion for rocks based on the peak value of deviatoric stress from triaxial tests[J]. Journal of China Coal Society，2019，44(Supp.2)：517-525.(in Chinese))
[12]	闫勋念. 粗粒土力学特性三轴试验与模拟研究[硕士学位论文][D]. 南京：河海大学，2006.(YAN Xunnian. Experimental study and simulation on the mechanical behavior of coarse grained soil[M. S. Thesis][D]. Nanjing：Hohai University，2006.(in Chinese))
[15]	ASGHARI E，TOLL D，HAERI S. Triaxial behaviour of a cemented gravely sand，Tehran alluvium[J]. Geotechnical and Geological Engineering，2003，21(1)：1-28.
[22]	WANG Y，LI X，ZHENG B，et al. An experimental investigation of the flow-stress coupling characteristics of soil-rock mixture under compression[J]. Transport in Porous Media，2016，112(2)：429-450.
[2]	胡引. 浅表地层土石混合体特定比对体系及其力学特性研究[硕士学位论文][D]. 湘潭：湘潭大学，2018.(HU Yin. Study on specific comparison system and mechanical properties of soil-rock mixture in shallow stratum[M. S. Thesis][D]. Xiangtan：Xiangtan University，2018.(in Chinese))
[3]	FEI K. Experimental study of the mechanical behavior of clay-aggregate mixtures[J]. Engineering Geology，2016，210：1-9.
[5]	王鹏. 土石混合体大型三轴试验及其细观力学特性的PFC模拟[硕士学位论文][D]. 重庆：重庆大学，2017.(WANG Peng. Soil-rock- mixture large-scale triaxial test and mesoscopic mechanics characteristics of PFC simulation[M. S. Thesis][D]. Chongqing：Chongqing University，2017.(in Chinese))
[7]	魏厚振，汪稔，胡明鉴，等. 蒋家沟砾石土不同粗粒含量直剪强度特征[J]. 岩土力学，2008，29(1)：48-51.(WEI Houzhen，WANG Ren，HU Mingjian，et al. Strength behaviour of gravelly soil with different coarse-grained contents in Jiangjiagou Ravine[J]. Rock and Soil Mechanics，2008，29(1)：48-51.(in Chinese))
[9]	施维成，朱俊高，代国忠，等. 粗粒土在p平面上的真三轴试验及强度准则[J]. 河海大学学报：自然科学版，2015，43(1)：11-15.(SHI Weicheng，ZHU Jungao，DAI Guozhong，et al. True triaxial tests of coarse-grained soil on π-plane and its strength criterion[J]. Journal of Hohai University：Natural Science，2015，43(1)：11-15.(in Chinese))
[13]	张宏明. 非饱和土石混合体的力学特性左变形破坏机制研究[硕士学位论文][D]. 武汉：长江科学院，2011.(ZHANG Hongming. Research on mechanics characteristics and mechanism of deformation and failure of unsaturated soil-rock mixture[M. S. Thesis][D]. Wuhan：Changjiang River Scientific Research Institute，2011.(in Chinese))
[20]	ZHANG C，MA C K，CHEN Q L，et al. Influence of rock percentage on strength and permeability of tailing-waste rock mixtures[J]. Bulletin of Engineering Geology and the Environment，2021，80(1)：399-411.
[24]	杜宇翔. 西南地区悬索桥重力式锚碇-地基系统承载机制与安全评价体系研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2020.(DU Yuxiang. Study on the bearing mechanism and safety evaluation system of gravity anchorage-foundation system for suspension bridges in southwest China[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2020.(in Chinese))
[26]	AMINI Y，HAMIDI A. Triaxial shear behavior of a cement-treated sand-gravel mixture[J]. Journal of Rock Mechanics and Geotechnical Engineering，2014，6(5)：455-465.
[31]	潘家军，王观琪，程展林，等. 基于非线性剪胀模型的面板堆石坝应力变形分析[J]. 岩土工程学报，2017，39(增1)：17-21.(PAN Jiajun，WANG Guanqi，CHENG Zhanlin，et al. Deformation prediction of concrete face rockfill dams based on nonlinear dilatancy model[J]. Chinese Journal of Geotechnical Engineering，2017，39(Supp.1)：17-21.(in Chinese))
[33]	LU J F，ZHANG C W，JIAN P. Meso-structure parameters of discrete element method of sand pebble surrounding rock particles in different dense degrees[C]// LI X，FENG Y，MUSTOE G，ed. Proceedings of the 7th International Conference on Discrete Element Methods. Singapore：Springer Proceedings in Physics，2016：188.
[35]	蒋正舜，苟志龙. 内马铁路残坡积土石混合体含石量对抗剪强度影响分析[J]. 路基工程，2020，(1)：49-54.(JIANG Zhengshun，GOU Zhilong. Study on influence of gravel content of residual soil-gravel mixture at Nairobi—Malabar railway on the shear strength[J]. Subgrade Engineering，2020，(1)：49-54.(in Chinese))
[37]	王远. 堆石料真三轴复杂应力路径条件下力学特性研究[博士位论文][D]. 北京：清华大学，2018.(WANG Yuan. The mechanical characteristics of rockfill materials under true triaxial stress conditions[Ph. D. Thesis][D]. Beijing：Tsinghua University，2018.(in Chinese))
[42]	刘新荣，涂义亮，王林枫，等. 土石混合体的剪切面分形特征及强度产生机制[J]. 岩石力学与工程学报，2017，36(9)：2 260-2 274. (LIU Xinrong，TU Yiliang，WANG Linfeng，et al. Fractal characteristics of shear failure surface and mechanism of strength generation of soil-rock aggregate[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(9)：2 260-2 274.(in Chinese))
[14]	王自高，胡瑞林，张瑞，等. 大型堆积体岩土力学特性研究[J]. 岩石力学与工程学报，2013，32(增2)：3 836-3 843.(WANG Zigao，HU Ruilin，ZHANG Rui，et al. Study of geotechnical mechanical characteristics of a large soil-rick mixture in a hydropower project[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(Supp.2)：3 836-3 843.(in Chinese))
[16]	涂义亮. 土石混合料宏细观力学特性及非线性弹塑性本构模型研究[博士学位论文][D]. 重庆：重庆大学，2017.(TU Yiliang. The macro and meso mechanical characteristics and nonlinear elastoplastic constitutive model of soil-rock aggregate[Ph. D. Thesis][D]. Chongqing：Chongqing University，2017.(in Chinese))
[17]	独莎莎. 土石混合体的强度、变形特征与土-石相互作用研究[硕士学位论文][D]. 南京：南京大学，2014.(DU Shasha. Study on the deformation，strength characteristics of the soil-rock mixture and the interaction mechanism between soil and gravel[M. S. Thesis][D]. Nanjing：Nanjing University，2014.(in Chinese))
[19]	秦尚林，陈善雄，韩卓，等. 巨粒土大型三轴试验研究[J]. 岩土力学，2010，31(增2)：189-192.(QIN Shanglin，CHEN Shanxiong，HAN Zhuo，et al. Large-scale triaxial test study of behavior of over coarse-grained soils[J]. Rock and Soil Mechanics，2010，31(Supp.2)：189-192.(in Chinese))
[28]	JIN L，ZENG Y W，XIA L，et al. Experimental and numerical investigation of mechanical behaviors of cemented soil-rock mixture[J]. Geotechnical and Geological Engineering，2017，35(1)：337-354.
[30]	陶庆东，何兆益，贾颖. 基于大三轴试验的土石混合体强度特性与影响因素[J]. 科学技术与工程，2019，19(26)：310-318.(TAO Qingdong，HE Zhaoyi，JIA Ying. Strength characteristics and influencing factors of soil-rock mixture based on large triaxial test[J]. Science Technology and Engineering，2019，19(26)：310-318.(in Chinese))
[39]	孙文君，宋杨，路维，等. 黄土-碎石混合体的力学性质试验研究[J]. 公路，2016，61(5)：178-181.(SUN Wenjun，SONG Yang，LU Wei，et al. Experimental study on mechanical properties of loess gravel mixture[J]. Highway，2016，61(5)：178-181.(in Chinese))
[41]	中华人民共和国行业标准编写组. SL237—1999 土工试验规程[S]. 北京：中国水利出版社，1999.(The Professional Standards Compilation Group of People¢s Republic of China. SL 237—1999 Specification of soil test[S]. Beijing：China Water Power Press，1999.(in Chinese))
[47]	HOEK E，BROWN E T. Empirical strength criterion for rock masses[J]. Journal of the Geotechnical Engineering Division-Asce，1980，106(9)：1 013-1 035.
[49]	HOEK E，WOOD D，SHAH S. A modified Hoek-Brown failure criterion for jointed rock masses[C]// HUDSON J A ed. Proceedins of the Rock Caracterization，Symposium of IRSM. London：British Geotechnical Society，1992：209-214.
[50]	SONMEZ H，ULUSAY R. Modifications to the geological strength index(GSI) and their applicability to stability of slopes[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(6)：743-760.
[56]	COLI N，BERRY P，BOLDINI D. In situ non-conventional shear tests for the mechanical characterisation of a bimrock[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(1)：95-102.
[18]	金磊，曾亚武，张森. 块石含量及形状对胶结土石混合体力学性能影响的大型三轴试验[J]. 岩土力学，2017，38(1)：141-149. (JIN Lei，ZENG Yawu，ZHANG Shen. Large scale triaxial tests on effects of rock block proportion and shape on mechanical properties of cemented soil-rock mixture[J]. Rock and Soil Mechanics，2017，38(1)：141-149.(in Chinese))
[21]	ZHANG H Y，XU W J，YU Y Z. Triaxial tests of soil-rock mixtures with different rock block distributions[J]. Soils and Foundations，2016，56(1)：44-56.
[23]	温辉波. 库岸松散堆积体抗剪强度试验研究[硕士学位论文][D]. 重庆：重庆交通大学，2012.(WEN Huibo. Experimental study on shear strength of loose accumulation soil along reservoir bank[M. S. Thesis][D]. Chongqing：Chongqing Jiaotong University，2012.(in Chinese))
[25]	DONG H，PENG B C，GAO Q F，et al. Study of hidden factors affecting the mechanical behavior of soil-rock mixtures based on abstraction idea[J]. Acta Geotechnica，2020：1-17.
[27]	HUANG Y L，LI J M，MA D，et al. Triaxial compression behaviour of gangue solid wastes under effects of particle size and confining pressure[J]. Science of The Total Environment，2019，693：133607.
[29]	SUN Z L，KONG L W，GUO A G，et al. Experimental and numerical investigations of the seismic response of a rock-soil mixture deposit slope[J]. Environmental Earth Sciences，2019，78(24)：1-14.
[32]	XU W J，HU L M，GAO W. Random generation of the meso-structure of a soil-rock mixture and its application in the study of the mechanical behavior in a landslide dam[J]. International Journal of Rock Mechanics and Mining Sciences，2016，86：166-178.
[34]	SHI W C，ZHU J G，CHIU C F，et al. Strength and deformation behaviour of coarse-grained soil by true triaxial tests[J]. Journal of Central South University of Technology，2010，17(5)：1 095-1 102.
[36]	ALHANI I J，BIN MD NOOR M J，AL-BARED M A M，et al. Mechanical response of saturated and unsaturated gravels of different sizes in drained triaxial testing[J]. Acta Geotechnica，2020：1-19.
[38]	郭熙灵，胡辉，包承纲. 堆石料颗粒破碎对剪胀性及抗剪强度的影响[J]. 岩土工程学报，1997，29(3)：86-91.(GUO Xiling，HU Hui，BAO Chenggang. Experimental studies of the effects of grain breakage on the dilatancy and shear strength of rock fill[J]. Chinese Journal of Geotechnical Engineering，1997，29(3)：86-91.(in Chinese))
[40]	张挺，温勇，杜秀忠，等. 筑堤清滩土石料大型抗剪强度试验研究[J]. 长江科学院院报，2018，36(2)：77-80.(ZHANG Ting，WEN Yong，DU Xiuzhong，et al. Large-scale shear strength tests of earth-rock embankment material from river dredging[J]. Journal of Yangtze River Scientific Research Institute，2019，36(2)：77-80.(in Chinese))
[43]	雷晓丹，杨忠平，张晓景，等. 土石混合料剪切特性及块石破碎特征[J]. 岩土力学，2018，39(3)：899-908.(LEI Xiaodan，YANG Zhongping，ZHANG Xiaojing，et al. Study on shear properties and rock block breakage characters of soil-rock mixtures[J]. Rock and Soil Mechanics，2018，39(3)：899-908.(in Chinese))
[45]	XU W J，XU Q，HU R L. Study on the shear strength of soil-rock mixture by large scale direct shear test[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(8)：1 235-1 247.
[44]	胡峰，李志清，胡瑞林，等. 基于大型直剪试验的土石混合体剪切带变形特征试验研究[J]. 岩石力学与工程学报，2018，37(3)：766-778.(HU Feng，LI Zhiqing，HU Ruilin，et al. Research on the deformation characteristics of shear band of soil-rock mixture based on large scale direct shear test[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(3)：766-778.(in Chinese))
[46]	胡伟. 溪洛渡库区典型土石混合体抗剪强度试验研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2014.(HU Wei. Experimental study on shear strength of soil-rock-mixture in Xiluodu reservoir[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2014.(in Chinese))
[53]	ZHANG Z P，SHENG Q，FU X D，et al. An approach to predicting the shear strength of soil-rock mixture based on rock block proportion[J]. Bulletin of Engineering Geology and the Environment，2020，79(5)：2 423-2 437.
[55]	ALTINSOY H. A physical based model investigation for determination of shear strength of block in matrix rocks[M. S. Thesis][D]. Hacettepe：Hacettepe University，Geological Engineering Department，2006.
[57]	AFIFIPOUR M，MOAREFVAND P. Mechanical behavior of bimrocks having high rock block proportion[J]. International Journal of Rock Mechanics and Mining Sciences，2014，65：40-48.
[59]	WANG Y，LI X. Experimental study on cracking damage characteristics of a soil and rock mixture by UPV testing[J]. Bulletin of Engineering Geology and the Environment，2014，74(3)：775-788.
[61]	冯春，李志刚，李世海. 脆性土石混合体单轴压缩特性的影响因素研究[J]. 计算力学学报，2018，35(3)：356-363.(FENG Chun，LI Zhigang，LI Shihai. Study on uniaxial compression characteristics of brittle rock and soil aggregate[J]. Chinese Journal of Computational Mechanics，2018，35(3)：356-363.(in Chinese))
[63]	MALLIKARJUNA R，RAO S，RAMA G. Influence of coarse fraction on characteristics of expansive soil-sand mixtures[J]. International Journal of Geosynthetics and Ground Engineering，2018，4(2)：19.
[64]	LE T M，DANG L C，KHABBAZ H. Combined effects of bottom ash and lime on behaviour of expansive soil[C]// MCCARTNEY J，HOYOS L ed. International Congress and Exhibition“Sustainable Civil Infrastructures：Innovative Infrastructure Geotechnology”. Switzerland Springer，Cham：[s. n.]，2018：24-28.
[51]	HOEK E，BROWN E T. The Hoek-Brown failure criterion and GSI-2018 edition[J]. Journal of Rock Mechanics and Geotechnical Engineering，2019，11(3)：445-463.
[58]	胡伟，闵弘，陈健，等. 碎石对土石混合体无侧限力学特性影响研究[J]. 长江科学院院报，2015，32(11)：55-61.(HU Wei，MIN Hong，CHEN Jian，et al. Study on the effect of gravel on unconfined mechanical properties of soil-rock mixture[J]. Journal of Yangtze River Scientific Research Institute，2015，32(11)：55-61. (in Chinese))
[60]	WANG Y，LI C H，HU Y Z. 3D image visualization of meso-structural changes in a bimsoil under uniaxial compression using X-ray computed tomography(CT)[J]. Engineering Geology，2019，248：61-69.