天然和饱水状态B类角砾岩的力学性质及其对地下厂房稳定性的影响

doi:10.13722/j.cnki.jrme.2015.1314

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摘要从现场勘查、室内试验和数值计算的角度对某厂房出露的B类角砾岩的岩体特性、力学性质与开挖卸荷后围岩稳定性做系统的分析。室内试验结果表明，0～15 MPa围压下B类角砾岩表现典型的弹脆塑性；饱水试样在相对较高围压下加载时，试样的变形趋于均匀化，此时弹性模量不再随围压增大而增大。峰值强度的离散性较大，这是由于试样中方解石含量不同，随方解石含量增大，试样峰值强度增大；饱水状态试样较天然状态内摩擦角小而黏聚力大，体现水对角砾岩黏结强度的提高和内摩擦因数的弱化作用；利用角砾岩区域的三维数值模型计算得到开挖卸荷条件下B类角砾岩区域围岩的基本力学响应。计算结果与现场监测数据吻合较好。经过对B类角砾岩出露区域系统地加强支护，确保了施工期角砾岩区域的稳定性。

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	李帅军1
	冯夏庭1
	徐鼎平1
	江权1
	周扬一1
	肖云华2

关键词 ：岩石力学, B类角砾岩, 天然和饱水状态, 软化作用, 地下厂房, 围岩稳定性

Abstract：The field investigation，laboratory experiment and numerical computation were carried out to systematically analyze the B-type breccia from a hydropower station. The laboratory test results indicated that the B-type breccia exhibits typical elasto-brittle-plastic feature under the confining pressures of 0–15 MPa. The specimen deformation tended to be uniform under relatively high confining pressure. Therefore，the elastic modulus had little relationship with the confining pressure. Due to the different calcite contents in the specimens，the peak strengths of the specimens differed markedly. Peak strength increased with the increasement of calcite contents. Compared with natural specimens，the internal friction angle of saturated specimens increased while cohesion decreases，which illustrated that water strengthened the bonding effect and weakened the internal friction coefficient；Three-dimensional numerical model including breccia mass was established. Mechanical response of B-type breccia under excavation was obtained through numerical computation. The numerical computation results fit well with monitoring data. It indicated that the surrounding rock was steady after systematic reinforced support have been set.

Key words： rock mechanics B-type breccia natural and saturated state softening effect underground powerhouse stability of surrounding rock

引用本文:

李帅军1，冯夏庭1，徐鼎平1，江权1，周扬一1，肖云华2. 天然和饱水状态B类角砾岩的力学性质及其对地下厂房稳定性的影响[J]. 岩石力学与工程学报, 2016, 35(8): 1530-1542.
LI Shuaijun1，FENG Xiating1，XU Dingping1，JIANG Quan1，ZHOU Yangyi1，XIAO Yunhua2. Mechanical property of B-type breccia under both natural and saturated state and its influence on the stability of underground powerhouse. , 2016, 35(8): 1530-1542.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.1314 或 http://www.rockmech.org/CN/Y2016/V35/I8/1530

[25]	GUO S F，QI S W. Numerical study on progressive failure of hard rock samples with an unfilled undulate joint[J]. Engineering Geology，2015，193：173-182. " target="_blank">
[26]	EBERTHARDT E，Brittle rock fracture and progressive damage in uniaxial compression[Ph. D. Thesis[D]. Saskatoon：University of Saskatchewan，1998. " target="_blank">
[2]	赵温霞. 周口店地质及野外地质工作方法与高新技术应用[M]. 武汉：中国地质大学出版社，2003：75.(ZHAO Wenxia. Methods and high-tech application of field geology work and Zhou Koudian geology[M]. Wuhan：China University of Geosciences Press，2003：75.(in Chinese)) " target="_blank">
[9]	钮新强，石伯勋，翁永红，等. 金沙江乌东德水电站可行性研究报告[R]. 武汉：长江勘测规划设计研究有限责任公司，2011.(NIU Xinqiang，SHI Boxun，WENG Yonghong，et al. Feasibility study report of Wudongde hydropower station in Jinshangjiang River[J]. Wuhan：Changjiang Institute of Survey，Planning，Design and Reaserch，2011.(in Chinese)) " target="_blank">
[10]	长江勘测规划设计研究有限责任公司. 金沙江乌东德水电站施工地质简报[R]. 武汉：长江勘测规划设计研究有限责任公司，2012.(Changjiang Institute of Survey，Planning，Design and Reaserch Limited Cooperation. Construction geology report of Wudongde Hydropower station in JinShajiang river[R]. Wuhan：Changjiang Institute of Survey，Planning，Design and Reaserch Limited Cooperation，2012.(in Chinese)) " target="_blank">
[12]	徐干成，郑颖人，乔春生，等. 地下工程支护结构与设计[M]. 北京：中国水利水电出版社，2013：55.(XU Gancheng，ZHENG Yingren，QIAO Chunsheng，et al. Supporting Structure and Design in Underground Engineering[M]. Beijing：China Water Power Press，2013：55.(in Chinese)) " target="_blank">
[14]	中华人民共和国国家标准编写组. GB/T50226—2013 工程岩体试验方法标准[S]. 北京：中国计划出版社，2013.(The National Standards Compilation Group of People?s Republic of China. GB/T50226—2013 Standard for test method of engineering rock mass[S]. Beijing：China Planning press，2013.(in Chinese)) " target="_blank">
[16]	陈静. 硬岩时效变形和破坏机制及其工程行为分析[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2013.(CHEN Jing. Time-dependent deformation and fracture mechanism of hard rock and engineering behavior analysis[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2013.(in Chinese)) " target="_blank">
[20]	蔡美峰. 岩石力学与工程[M]. 北京：科学出版社，2012：97.(CAI Meifeng. Rock mechanics and engineering[M]. Beijing：Science Press，2012：97.(in Chinese)) " target="_blank">
[3]	孙广忠. 岩体结构力学[M]. 北京：科学出版社，1988：20.(SUN Guangzhong. Mechanics of rock mass structure[M]. Beijing，1988：20.(in Chinese)) " target="_blank">
[1]	孟召平，苏永华. 沉积岩体力学理论与方法[M]. 北京：科学出版社，2006：22.(MENG Zhaoping，SU Yonghua. Theories and methods of lithesome mechanics[M]. Beijing：Science Press，2006：22.(in Chinese)) " target="_blank">
[4]	贺明武，彭吉银，王义峰，等. 乌东德水电站左岸地下厂房区角砾岩地质力学特性及其工程防治实践[J]. 岩土力学，2014，35(4)：1 063-1 068.(HE Mingwu，PENG Jiyin，WANG Yifeng，et al. Geomechanical properties and engineering prevention of breccias in left bank underground powerhouse of Wudongde hydropower station[J]. Rock and Soil Mechanics，2014，35(4)；1 063-1 068.(in Chinese)) " target="_blank">
[6]	邓建华，黄醒春，彭结兵，等. 膏溶角砾岩不同天然含水率情况下力学特性的试验研究[J]. 岩土工程学报，2008，30(8)：1 203-1 207.(DENG Jianhua，HUANG Xingchun，PENG Jiebing，et al. Mechanical properties of Gypsum Breccia with different water contents[J]. Chinese Journal of Geotechnical Engineering，2008，30(8)：1 203-1 207.(in Chinese)) " target="_blank">
[7]	宋飞，赵法锁，李亚兰. 石膏角砾岩蠕变特性试验研究[J]. 水文地质工程地质，2005，32(3)：94-96.(SONG Fei，ZHAO Fasuo，LI Yalan. Experimental study of gypsum breccias creep characteristic[J]. Chinese Journal of Hydrogeology Engineering，2005，32(3)：94-96.(in Chinese)) " target="_blank">
[17]	STILLE H，PALMSTRÖM A. Ground behavior and rock mass composition in underground excavations[J]. Tunnelling and Underground Space Technology，2008，23(1)：46-64.
[27]	JAEGER J C. Rock failure at lower confining pressure[J]. Engineering，1960，189：283-284. " target="_blank">
[30]	江权，冯夏庭，向天兵，等. 大型洞室群稳定性分析与智能动态优化设计的数值仿真研究[J]. 岩石力学与工程学报，2011，30(3)：524-539.(JIANG Quan，FENG Xiating，XIANG Tianbing，et al. Numerical simulation method for stability analysis and intelligent and dynamic of optimization design of large cavern group[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(3)：524-539.(in Chinese))
[5]	史明魁，苟月明，陈富文，等. 火成角砾岩研究的意义与方法[J]. 华南地质与矿产，2000，(2)：29-33.(SHI Mingkui，GOU Yueming，CHEN Wenfu，et al. Significances and methods of study of eruptive breccias[J]. Geology and Mineral Resources of South China，2000，(2)：29-33.(in Chinese)) " target="_blank">
[8]	熊江陵，李建华. 太行山隧道膏溶角砾岩工程特性试验研究[J]. 铁道标准设计，2007，21(增1)：6-8.(XIONG Jiangling，LI Jianhua. Experimental study of gypsum breccias engineering characteristic of the tunnel in Taihang Mountain[J]. Railway Standard Design，2007，21(Supp.1)：6-8.(in Chinese)) " target="_blank">
[11]	朱勤文. 岩类学简明教程[M]. 武汉：中国地质大学岩石教研室，1989：35.(ZHU Qinwen. Brief tutorial of petrography[M]. Wuhan：China University of Geosciences Teaching-Research Office of Rock，1989：35.(in Chinese)) " target="_blank">
[13]	冯夏庭，张传庆，李邵军，等. 深埋硬岩隧洞动态设计方法[M]. 北京：科学出版社，2013：140.(FENG Xiating，ZHANG Chuanqing，LI Shaojun，et al. Dynamic design method for deep tunnels in hard rock[M]. Beijing：Science Press，2013：140.(in Chinese)) " target="_blank">
[15]	中华人民共和国行业标准编写组. SL264—2001 水利水电工程岩石试验规程[S]. 北京：中国标准出版社，2001.(The Professional Standards Compilation Group of People?s Republic of China. SL264—2001 Specifications for rock tests in water conservancy and hydroelectric engineering[S]. Beijing：China Standard Press，2001.(in Chinese)) " target="_blank">
[18]	张凯，周辉，冯夏庭，等. 大理岩弹塑性耦合特性试验研究[J]. 岩土力学，2010，31(8)：2 425-2 434.(ZHANG Kai，ZHOU Hui，FENG Xiating，et al. Experimental research on elastoplastic coupling character of marble[J]. Rock and Soil Mechanics，2010，31(8)：2 425-2 434.(in Chinese)) " target="_blank">
[21]	尤明庆，岩石的力学性质[M]. 北京：地质出版社，2007：17.(YOU Mingqing，Mechanics properties of rock[M]. Beijing，Geology Publishing House，2012：17.(in Chinese)) " target="_blank">
[23]	郭应征，李兆霞. 应用力学基础[M]. 北京：高等教育出版社，2000：2.(GUO Yingzheng，LI Zhaoxia. Foundation of applied mechanics[M]. Beijing：Higher Education Press，2000：2.(in Chinese)) " target="_blank">
[28]	江权，冯夏庭，陈国庆. 考虑高地应力下围岩劣化的硬岩本构模型研究[J]. 岩石力学与工程学报，2008，29(1)：144-152.(JIANG Quan，FENG Xiating，CHEN Guoqing. Study on constitutive model of hard rock considering surrounding rock deterioration under high geostresses[J]. Chinese Journal of Rock Mechanics and Engineering，2008，29(1)：144-152.(in Chinese)) " target="_blank">
[31]	乌东德工程建设部技术管理部. 乌东德水电站安全监测周报(地厂工程)[R]. 北京：中国长江三峡集团公司，2015.(Ministry and technical management department of Wudongde engineering. Weekly report of safety monitoring for Wudongde hydropower station (underground main powerhouse engineering)[R]. Beijing：China Three Gorges Corporation，2015.(in Chinese)) " target="_blank">
[19]	HUDSON J A，HARRISON J P. 工程岩石力学，上卷：原理导论[M]. 冯夏庭译. 北京：科学出版社，2009：65.(HUDSON J A，HARRISON J P. Engineering rock mechanics，an introduction to the principles[M]. Beijing：Science Press，2009：65.(in Chinese)) " target="_blank">
[22]	周辉，孟凡震，张传庆，等. 基于应力-应变曲线的岩石脆性特征定量评价方法[J]. 岩石力学与工程学报，2014，33(6)：1 114- 1 122.(ZHOU Hui，MENG Fanzhen，ZHANG Chuanqing，et al. Quantitative evaluation of rock brititleness based on stress-strain curve[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(6)：1 114-1 122.(in Chinese)) " target="_blank">
[24]	中华人民共和国国家标准编写组. GB 50021—2001 岩土工程勘察规范[S]. 北京：中国建筑工业出版社，2009.(The National Standards Compilation Group of People?s Republic of China. GB 50021—2001 Code for investigation of geotechnical engineering[S]. Beijing：China Building Industry Press，2009.(in Chinese)) " target="_blank">
[29]	郑颖人，孔亮. 岩土塑性力学[M]. 北京：中国建筑工业出版社，2010：10.(ZHENG Yingren，KONG Liang. Geotechnical plasticity mechanics[M]. Beijing：China Building Industry Press，2010：10.(in Chinese)) " target="_blank">