弱胶结西域砾岩组构特征及其力学性能演化规律研究

doi:10.13722/j.cnki.jrme.2023.0937

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (2963 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The weakly cemented Xiyu conglomerates are widely distributed in the northern and southern foothills of Tianshan Mountains in Xinjiang. The material composition of Xiyu conglomerates is complex，and their mechanical properties are poor. In order to scientifically understand the evolution laws of mechanical properties of weakly cemented Xiyu conglomerate，its grain fabric characteristics and macro mechanical properties were systematically studied by means of laboratory test and in-situ large-scale true triaxial test. The results indicate that：(1) The material composition of weakly cemented Xiyu conglomerate is relatively high in the three particle groups of crushed stones，coarse gravels，and medium gravels. And the particle size distribution of weakly cemented Xiyu conglomerate is poor. The inter-granular contact between large and coarse particles such as crushed stones and gravels involves either particle suspension or particle support. The inter-granular cementation is mainly pore-type cementation. (2) Due to the influence of particle arrangement，weakly cemented Xiyu conglomerates exhibit obvious anisotropic deformation characteristics. The deformation modulus is highest in the vertical direction，lowest in the direction of the particle's major axis(nearly perpendicular to the Tianshan Mountain)，and moderate in the direction of the particle's mid axis(nearly parallel to the Tianshan Mountain). However，with the increase of stress level，the weakly cemented Xiyu conglomerates tend to be isotropic. (3) Under triaxial stress state，weakly cemented Xiyu conglomerate shows strain hardening characteristics in the yield stage. After reaching peak strength，it shows typical plastic flow characteristics. (4) The shear strength of weakly cemented Xiyu conglomerates have obvious nonlinear characteristics，loading and unloading stress path effects and intermediate principal stress effects. The higher the stress level，the smaller the internal friction angle and the greater the cohesion. The internal friction angle of Xiyu conglomerate under unloading condition is higher than that under loading condition，while the cohesion under unloading condition is lower than that under loading condition. Under true triaxial loading，the peak strength increases with the increase of intermediate principal stress，and the effect of the intermediate principal stress on the shear strength parameter，cohesion，is more obvious. (5) The failure of weakly cemented Xiyu conglomerate under triaxial stress is mainly compression-shear failure. After failure，a steep main fracture zone is formed，and the main fracture zones are connected by tensile cracks. The test results provide an important basis for systematically understanding the macro mechanical properties and their evolution laws of the weakly cemented Xiyu conglomerates.

Key words： rock mechanics weakly cemented Xiyu conglomerate in-situ true triaxial test grain fabric mechanical behavior evolution mechanism

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	FAN Lei
	HU Wei
	ZHANG Yihu

Cite this article:

FAN Lei,HU Wei,ZHANG Yihu. Study on the fabric characteristics and evolution mechanism of the mechanical behavior of weakly cemented Xiyu conglomerate[J]. , 2024, 43(8): 1893-1908.

URL:

http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0937 OR http://rockmech.whrsm.ac.cn/EN/Y2024/V43/I8/1893

[2]	陈华慧，林秀伦，关康年，等. 新疆天山地区早更新世沉积及其下限[J]. 第四纪研究，1994，14(1)：38-47.(CHEN Huahui，LIN Xiulun，GUAN Kangnian，et al. Early pleistocene deposits and its lower boundary in Tianshan Mt，Xinjiang region[J]. Quaternary Sciences，1994，14(1)：38-47.(in Chinese))
[4]	陈杰，尹金辉，曲国胜，等. 塔里木盆地西缘西域组的底界、时代、成因与变形过程的初步研究[J]. 地震地质，2000，22(增1)：104-116.(CHEN Jie，YIN Jinhui，QU Guosheng，et al. Timing，lower boundary，genesis and deformation of Xiyu formation around the western margins of the Tarim basin[J]. Seismology and Geology，2000，22(Supp.1)：104-116.(in Chinese))
[7]	王复兴. 新疆奎屯河新龙口水电站弹性抗力系数专题试验研究[R]. 武汉：长江水利委员会长江科学院，2015.(WANG Fuxing. Special experimental study on elastic resistance coefficient of Xinlongkou hydropower station on Kuitun river in Xinjiang[R]. Wuhan：Changjiang River Scientific Research Institute，2015.(in Chinese))
[10]	王传宝. 新疆西域砾岩抗剪强度现场直剪试验研究[J]. 新疆农垦科技，2022，45(3)：64-66.(WANG Chuanbao. In-situ shear tests study on the shear strength of Xiyu conglomerates in Xinjiang region[J]. Xinjiang Agricultural Reclamation Technology，2022，45(3)：64-66.(in Chinese))
[5]	陈杰，HEERMANCE R V，BURBANK D W，等. 中国西南天山西域砾岩的磁性地层年代与地质意义[J]. 第四纪研究，2007，27(4)：576-587.(CHEN Jie，HEERMANCE R V，BURBANK D W，et al. Magnetochronology and its implications of the Xiyu conglomerate in the southwestern Chinese Tianshan foreland[J]. Quaternary Sciences，2007，27(4)：576-587.(in Chinese))
[12]	都里昆•吐尔汗. 西域砾岩水理特性试验研究[J]. 水利建设与管理，2023，43(2)：11-15.(DULIKUN•Tu?erhan. Experimental study on hydrophysical properties of Xiyu conglomerate[J]. Hydraulic Power Construction and Management，2023，43(2)：11-15.(in Chinese))
[14]	ZHANG Q，ZHENG Y N，JIA C J，et al. Investigation of the stability and failure mechanism of slopes in Xiyu conglomerate due to toe erosion[J]. Bulletin of Engineering Geology and the Environment，2023，82(6)：206.
[15]	朱举，乔春生，宋仪，等. 颗粒特性对第三系弱胶结砾岩抗剪强度的影响[J]. 哈尔滨工业大学学报，2019，51(5)：100-109. (ZHU Ju，QIAO Chunshen，SONG Yi，et al. Effect of particle characteristics on shear strength of weakly cemented conglomerate in tertiary[J]. Journal of Harbin Institute of Technology，2019，51(5)：100-109.(in Chinese))
[25]	GARBOCZIA E J，LIU X F，TAYLOR M A. The 3-D shape of blasted and crushed rocks：from 20μm to 38μm[J]. Power Technology，2012，229：84-89.
[45]	XU W J，ZHANG H Y. Meso and macroscale mechanical behaviors of soil-rock mixtures[J]. Acta Geotechnica，2022，17(9)：3 765-3 782.
[3]	滕志宏，岳乐平，蒲仁海，等. 用磁性地层学方法讨论西域组的时代[J]. 地质论评，1996，42(6)：481-489.(TENG Zhihong，YUE Leping，PU Renhai，et al. The magnetostratigraphic age of the Xiyu Formation[J]. Geological Review，1996，42(6)：481-489.(in Chinese))
[13]	都里昆•吐尔汗. 西域砾岩力学特性原位试验研究[J]. 水利建设与管理，2023，43(4)：14-20.(DULIKUN•Tu?erhan. In-situ test study on the mechanical properties of conglomerate in western regions[J]. Hydraulic Power Construction and Management，2023，43(4)：14- 20.(in Chinese))
[23]	CASAGLI N，ERMINI L，ROSATI G. Deterring grain size distribution of the material composing landslide dams in the Northern Apennines：Sampling and processing methods[J]. Engineering Geology，2003，69(1/2)：83-97.
[33]	DINE B S E，DUPLA J C，FRANK R，et al. Mechanical characterization of matrix coarse grained soils with a large-sized triaxial device[J]. Canadian Geotechnical Journal，2010，47(4)：425-438.
[43]	WANG S N，LI Y，GAO X Q，et al. Influence of volumetric block proportion on mechanical properties of virtual soil-rock mixtures[J]. Engineering Geology，2020，278：105850.
[1]	黄汲清，陈炳蔚. 特提斯-喜马拉雅构造域上新世-第四纪磨拉石的形成及其与印度板块活动的关系[C]// 国际交流地质学术论文集(1) 构造地质地质力学. 北京：地质出版社，1980：1-14.(HUANG Jiqing，CHEN Bingwei. The formation of upper Pliocene-Quaternary Molasse in Tethys-Himalayan tectonic domain and its relationship with India plate activity[C]// International Symposium on Analytical Geology(1) Structural Geology Geomechanics. Beijing：Geological Press，1980：1-14.(in Chinese))
[11]	王传宝. 新疆西域砾岩组构特征及物理特性研究[J]. 甘肃水利水电技术，2022，58(3)：48-52.(WANG Chuanbao. Study on the fabric characteristics and physical characteristics of Xiyu conglomerates in Xinjiang region[J]. Gansu Water Resources and Hydropower Technology，2022，58(3)：48-52.(in Chinese))
[21]	WEI J，LIAO H L，HUANG B，et al. Effect of the random distribution of gravel particles on the mechanical behaviors of conglomerate[J]. Arabian Journal of Geosciences，2023，16(8)：485.
[24]	LANARO F，TOLPPANEN P. 3D characterization of coarse aggregate[J]. Engineering Geology，2002，65(1)：17-30.
[31]	李长圣，张丹，王宏宪，等. 基于CT扫描的土石混合体三维数值网格的建立[J]. 岩土力学，2014，35(9)：2 731-2 736.(LI Changsheng，ZHANG Dan，WANG Hongxian，et al. 3D mesh generation for soil-rock mixture based on CT scanning[J]. Rock and Soil Mechanics，2014，35(9)：2 731-2 736.(in Chinese))
[41]	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))
[6]	闰建玲，于为. 对新疆某水电站西域砾岩变形特性的探讨[J]. 资源环境与工程，2016，30(3)：361-363.(YAN Jianling，YU Wei. Discussion on deformation characteristics of western conglomerate in a Hydropower Station，Xinjiang Province[J]. Resources Environment and Engineering，2016，30(3)：361-363.(in Chinese))
[35]	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.
[42]	胡瑞林，李晓，王宇，等. 土石混合体工程地质力学特性及其结构效应研究[J]. 工程地质学报，2020，28(2)：255-281.(HU Ruilin，LI Xiao，WANG Yu，et al. Research on engineering geomechanics and structural effect of soil-rock mixture[J]. Journal of Engineering Geology，2020，28(2)：255-281.(in Chinese))
[8]	范雷，张宜虎，陈冲，等. 弱胶结西域砾岩引水隧洞围岩抗力特性试验研究[J]. 岩土力学，2019，40(8)：2 982-2 988.(FAN Lei，ZHANG Yihu，CHEN Chong，et al. Experimental research on resistance characteristics of weakly cemented Xiyu conglomerate diversion tunnel surrounding rock[J]. Rock and Soil Mechanics，2019，40(8)：2 982-2 988.(in Chinese))
[9]	李文新，王玉杰，王兆云，等. 西域砾岩宏观地质特性与分类方法[J]. 水利水电技术：中英文，2022，53(增2)：394-398.(LI Wenxin，WANG Yujie，WANG Zhaoyun，et al. Geological characteristics and classification methods of Xiyu conglomerates[J]. Water Resources and Hydropower Engineering，2022，53(Supp.2)：394-398.(in Chinese))
[18]	宋朝阳，宁方波. 弱胶结类岩石细观结构参数与其宏观力学行为的关联性研究进展[J]. 金属矿山，2018，(12)：1-9.(SONG Zhaoyang，NING Fangbo. Progress on the association between mesostructural parameters and macromechanical behaviors of weakly cemented rocks[J]. Metal Mine，2018，(12)：1-9.(in Chinese))
[19]	AKRAM M S，SHARROCK G B，MITRA R. Investigating mechanics of conglomeratic rocks：influence of clast size distribution，scale and properties of clast and interparticle cement[J]. Bulletin of Engineering Geology and the Environment，2019，78(4)：2 769-2 788.
[28]	XU W J，YUE Z Q，HU R L. Study on the mesostructure and mesomechanical characteristics of the soil-rock mixture using digital image processing based ?nite element method[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(5)：749-762.
[29]	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.
[38]	范永波，李世海，侯岳峰，等. 不同边界条件下土石混合体破坏机制研究[J]. 水文地质工程地质，2013，40(3)：48-51.(FAN Yongbo，LI Shihai，HOU Yuefeng，et al. A study of the failure mechanism of rock and soil associate under different boundary conditions[J]. Hydrogeology and Engineering Geology，2013，40(3)：48-51.(in Chinese))
[39]	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))
[16]	FU X D，DU Y X，SHENG Q. Geo?engineering descriptions and damage characteristics assessment for Xigeda formation，Yunnan Province，China[J]. Environmental Earth Sciences，2021，80(19)：670.
[17]	FU X D，DU Y X，SHENG Q，et al. Influences of water on the microstructure and mechanical behavior of the Xigeda formation[J]. Bulletin of Engineering Geology and the Environment，2022，81(1)：72.
[20]	WANG J B，GE H K，LIU J T，et al. Effects of gravel size and content on the mechanical properties of conglomerate[J]. Rock Mechanics and Rock Engineering，2022，55(4)：2 493-2 502.
[22]	LI J R，DUAN K，MENG H，et al. On the mechanical properties and failure mechanism of conglomerate specimens subjected to triaxial compression tests[J]. Rock Mechanics and Rock Engineering，2023，56(2)：973-995.
[26]	廖秋林，李晓，朱万成，等. 基于数码图像土石混合体结构建模及其力学结构效应的数值分析[J]. 岩石力学与工程学报，2010，29(1)：155-162.(LIAO Qiulin，LI Xiao，ZHU Wancheng，et al. Structure model construction of rock and soil aggregate based on digital image technology and its numerical simulation on mechanical structure effects[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(1)：155-162.(in Chinese))
[27]	张亚南，冯春，李世海. 采用波动方法探测土石混合体结构特性的可行性研究[J]. 岩石力学与工程学报，2011，30(9)：1 855-1 863. (ZHANG Yanan，FENG Chun，LI Shihai. Feasibility study of wave method for detecting structural properties of soil-rock mixtures[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(9)： 1 855-1 863.(in Chinese))
[30]	徐文杰，许强. 岩土材料细观结构定量化表述方法研究——以土石混合体为例[J]. 岩石力学与工程学报，2012，31(3)：499-506. (XU Wenjie，XU Qiang. Study of quantitative description methods of geomaterial meso-structure—taking soil rock mixture for example[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(3)：499-506.(in Chinese))
[32]	BAGHERZADEH-KHALKHALI A，MIRGHASEMI A A. Numerical and experimental direct shear tests for coarse grained soils[J]. Particuology，2009，7(1)：83-91.
[34]	HAM T G，NAKATA Y，ORENSE R P，et al. Influence of gravel on the compression characteristics of decomposed granite soil[J]. Journal of Geotechnical and Geoenvironmental Engineering，2010，136(11)：1 574-1 577.
[36]	SONMEZ H，ERCANOGLU M，KALEDER A，et al. Predicting uniaxial compressive strength and deformation modulus of volcanic bimrock considering engineering dimension[J]. International Journal of Rock Mechanics and Mining Sciences，2016，86：91-103.
[37]	李晓，廖秋林，赫建明，等. 土石混合体力学特性的原位试验研究[J]. 岩石力学与工程学报，2007，26(12)：2 377-2 384.(LI Xiao，LIAO Qiulin，HE Jianming，et al. Study on in-situ tests of mechanical characteristics on soil-rock aggregate[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(12)：2 377-2 384.(in Chinese))
[40]	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.
[44]	XU W J，ZHANG H Y. Research on the effect of rock content and sample size on the strength behavior of soil-rock mixture[J]. Bulletin of Engineering Geology and the Environment，2021，80(3)：2 715- 2 726.
[46]	中华人民共和国国家标准编写组. GB/T 50145—2007土的工程分类标准[S]. 北京：中国计划出版社，2008.(The National Standards Compilation Group of People?s Republic of China. GB/T 50145—2007 Standard for engineering classification of soil[S]. Beijing：China Planning Press，2008.(in Chinese))