白鹤滩水电站主厂房第I层开挖期围岩变形规律与机制研究

doi:10.13722/j.cnki.jrme.2016.0799

摘要
图/表
参考文献(28)
相关文章 (15)

全文: PDF (4019 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要白鹤滩水电站地下洞室群规模宏大，厂房区构造应力高，地质条件复杂。主厂房第I层施工期，围岩变形和稳定问题突出。根据主厂房第I层开挖支护完毕后围岩变形监测资料，结合地质资料、施工情况，分析主厂房围岩变形规律与机制。统计分析得到，在高地应力和软弱地质构造控制下，围岩位移量值较大；由于右岸场区初始地应力大于左岸，右厂扩挖跨度大于左厂，且不良地质构造较左厂发育，右岸主厂房围岩变形量值普遍大于左厂；受初始最大主应力方向影响，左右岸主厂房拱顶和下游拱肩围岩变形普遍大于上游拱肩，且围岩变形较大部位均发育软弱构造带或岩体较破碎；围岩位移与开挖卸荷关系密切，监测断面附近开挖时，位移–时程曲线随开挖呈台阶式增长；岩体质量较好的洞段，掌子面的位移空间效应范围约一倍洞室跨度；软弱构造处，围岩变形在较长时期内随施工活动小幅跳跃增长，掌子面空间效应达到两倍洞室跨度；围岩时效变形不明显；软弱构造处围岩变形速率数倍于完整岩体。分析总结白鹤滩水电站地下厂房围岩变形规律对保障施工期安全和预测下阶段开挖围岩稳定性具有重要意义

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	李帅军1
	冯夏庭1
	徐鼎平1
	江权1
	刘国锋1
	樊义林2

关键词 ：岩石力学, 地下工程, 安全监测, 围岩位移, 软弱构造, 变形速率

Abstract：The underground powerhouse cavern group in Baihetan hydropower station is in an extremely grand scale. Geostress in powerhouse area is relatively high and geological condition is quite complicated. The problems of surrounding rock deformation and stability are serious during the first layer of main power houses construction.. Based on deformation monitoring data after excavation of I layer，the deformation characteristic of the surrounding rock in main power houses are systematically analyzed，combining geological conditions and construction information. The mechanism of deformation characteristic is illustrated as well. Analysis shows that under the control of high ground stress and weak tectonic zone，surrounding rock deformation is relatively large after the I layer excavation in both riversides；Resulting from the larger ground stress in right bank than that in left bank，the larger expanding excavation span in right bank and more pervasive adverse geological structures development in right site area，surrounding rock deformation of main house in right bank is thus generally larger than that in left bank； Deformation in vault and downstream spandrel is generally larger than that in upstream due to the maximum principle stress direction；It is observed that there are usually weak tectonic zones or poor quality rock mass where the deformation is more pronounced；Surrounding rock deforms closely related to excavation. The deformation-time curves exhibit step-increase when excavates near the monitoring section. As for the tunnel section where rock mass quality is relatively good，the span of spatial effect is about the cavern span. However，for the tunnel section with weak tectonic zones，deformation keeps continuous increment following construction. Distance of spatial effect reaches approximately two diameters of cavern span. Rock mass deformation exhibits time-independent；Deformation velocity near tectonic zone is usually several times of that at quite good quality rock. To analyze and summarize the surrounding rock deformation characteristic and understand the mechanism is of significance for safety during construction period and for the prediction of rock stability for future construction stage.

Key words： rock mechanics underground engineering safety monitoring surrounding rock deformation weak tectonic zone deformation velocity

引用本文:

李帅军1，冯夏庭1，徐鼎平1，江权1，刘国锋1，樊义林2. 白鹤滩水电站主厂房第I层开挖期围岩变形规律与机制研究[J]. 岩石力学与工程学报, 2016, 35(S2): 3947-3959.
LI Shuaijun1，FENG Xiating1，XU Dingping1，JIANG Quan1，LIU Guofeng1，FAN Yilin2. Study of the characteristics and mechanism of surrounding rock deformation during the first layer excavation in Baihetan hydorpower station underground main powerhouses. , 2016, 35(S2): 3947-3959.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.0799 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/3947

[1] 黄润秋，黄达，段绍辉，等. 锦屏Ⅰ级水电站地下厂房施工期围岩变形开裂特征及地质力学机制研究[J]. 岩石力学与工程学报，2011，30(1)：23–35.(HUANG Runqiu，HUANG Da，DUAN Shaohui， et al. Geomechanics mechanism and characteristics of surrounding rock mass deformation failure in construction phase for underground powerhouse of JinpingⅠhydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(1)：23–35.(in Chinese))

[2] 冯夏庭，江权，向天兵，等. 大型洞室群智能动态设计方法及其实践[J]. 岩石力学与工程学报，2011，30(3)：433–448.(FENG Xiating，JIANG Quan，XIANG Tianbing，et al. Intelligent and dynamic design method of large cavern group and its practice[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(3)：433–448.(in Chinese))

[3] 李仲奎，周钟，汤雪峰，等. 锦屏一级水电站地下厂房洞室群稳定性分析与思考[J]. 岩石力学与工程学报，2009，28(11)：2 167–2 175. (LI Zhongkui，ZHOU Zhong， TANG Xuefeng，et al. Stability analysis and considerations of underground powerhouse caverns group of Jinping I hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(11)：2 167–2 175.(in Chinese))

[4] 黄秋香，邓建辉，苏鹏云，等. 瀑布沟水电站地下厂房洞室群施工期围岩位移特征分析[J]. 岩石力学与工程学报，2011，30(增1)：3 032–3 042. (HUANG Qiuxiang，DENG Jianhui，SU Pengyun，et al. Displacement characteristics analysis of surrounding rock in underground powerhouse chambers at Pubugou hydropower station during construction[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(Supp.1)：3 032–3 042.(in Chinese))

[5] 李志鹏，徐光黎，董家兴，等. 猴子岩水电站地下厂房洞室群施工期围岩变形与破坏特征[J]. 岩石力学与工程学报，2014，33(11)：2 291–2 300.(LI Zhipeng，XU Guangli，DONG Jiaxing，et al. Deformation and fracture of surrounding rock mass of underground caverns at Houziyan hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(11)：2 291–2 300.(in Chinese))

[6] 姚强，杨兴国，刘勇林，等. 大型地下厂房洞室群施工期围岩变形分析[J]. 地下空间与工程学报，2014，33(5)：1 164–1 169.(YAO Qiang，YANG Xingguo，LIU Yonglin，et al. Deformation of surrounding rock mass of large underground powerhouse cavern groups during their construction[J]. Chinese Journal of Underground Space and Engineering，2014，33(5)：1 164–1 169.(in Chinese))

[7] HE M C，SOUSA R L，MÜLLER A，et al，Analysis of excessive deformations in tunnels for safety evaluation[J]. Tunnelling and Underground Space Technology，2015，45：190–202.

[8] SOUSA R L. Risk analysis for tunneling projects[Ph. D. Thesis][D]. Cambridge：Cambridge University，2010.

[9] 蔡美峰岩石力学与工程[M]. 北京：科学出版社，2013：348.(CAI Meifeng. Rock mechanics and engineering[M]. Beijing：Science Press，2013：348.(in Chinese))

[10] 高春玉，邓建辉，魏进兵. 官地地下厂房洞室群施工期围岩位移特征分析[J]. 岩石力学与工程学报，2012，31(2)：3 911–3 919.(GAO Chunyu，DENG Jianhui，WEI Jinbing. Analysis of surrounding rock displacement characteristics[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.2)：3 911–3 919.(in Chinese))

[11] 李正刚. 二滩水电站地下厂房系统洞室围岩变形研究[J]. 四川水力发电，2004，(1)：43–47.(LI Zhenggang. Research of deformation of surrounding rock in underground main house in Ertan hydropower station[J]. Sichuan Water Power，2004，(1)：43–47.(in Chinese))

[12] 廖秋林，侯哲生，何小东，等. 断层影响下隧道围岩变形监测与特征分析[J]. 水文地质工程地质，2005，32(6)：102–107.(MIAO Qiulin，HOU Zhesheng，HE Xiaodong，et al. Monitoring and characteristic of deformation of tunnel surrounding rock with effect of fault[J]. Journal of Hydrology and Engineering Geology，2005，32(6)：102–107.(in Chinese))

[13] 李守柱，黄鼎成，邢念信，等. 软弱破碎围岩变形特性[J]. 工程地质学报，1993，1(1)：74–84.(LI Shouzhu，HUANG Dingcheng，XING Nianxin，et al. Deformation characteristic of soft and broken surrounding rock[J]. Journal of Engineering Geology，1993，1(1)：74–84.(in Chinese))

[14] 彭琦，王俤剀，邓建辉，等. 地下厂房围岩变形特征分析[J]. 岩石力学与工程学报，2007，26(12)：2 583–2 587.(PENG Qi，WANG Dikai，DENG Jianhui，et al. Analysis of surrounding rock deformation characteristic in underground powerhouse[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(12)：2 583–2 587(in Chinese))

[15] 高春玉，邓建辉，魏进兵. 官地地下厂房洞室群施工期围岩位移特征分析[J]. 岩石力学与工程学报，2012，31(增2)：3 911–3 919.(GAO Chunyu，DENG Jianhui Wei Jinbing. Analysis of surrounding rock displacement characteristics during construction in Guandi underground powerhouse chambers[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.2)：3 911–3 919.(in Chinese))

[16] 魏进兵，邓建辉，王俤剀，等. 锦屏一级水电站地下厂房围岩变形与破坏特征分析[J]. 岩石力学与工程学报，2010，29(6)：1 198–1 205. (WEI Jinbing，DENG Jianhui，WANG Dikai，et al. Characterization of deformation and fracture for rock mass in underground powerhouse of Jinping I hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(6)：1 198–1 205.(in Chinese))

[17] HÅKAN S，ARILD P. Ground behaviour and rock mass composition in underground excavations[J]. Tunnelling and Underground Space Technology，2008，23(1)：46–64.

[18] ALEJANO L R，RODRIGUEZ-DONO A，ALONSO E，et al. Ground reaction curves for tunnels excavated in different quality rock masses showing several types of post-failure behaviour[J]. Tunnelling and Underground Space Technology，2009，24(6)：689–705.

[19] 张春生，王岩，陈正雄. 金沙江白鹤滩水电站可行性研究报告[R]. 杭州：中国水电设计集团华东勘测设计研究院，2011.(ZHANG Chunsheng，WANG Yan，CHEN Zhengxiong. Feasibility study report of Baihetan hydropower station[R]. Hangzhou：PowerChina Huadong Engineering Corporation Limited，2011.(in Chinese))

[20] 孟国涛，褚卫江. 金沙江白鹤滩水电站地下厂房第Ⅰ层开挖围岩破坏机理与工程对策研究[R]. 杭州：浙江中科伊泰斯卡岩石工程研发有限公司，2014.(MENG Guotao，CHU Weijiang. Surrounding rock failure mechanism and engineering countermeasures of first floor excavation of underground powerhouse in BaiHetan hydropower station[R]. Hangzhou：HydroChina-Itasca R&D Center，2014.(in Chinese))

[21] 张春生. 金沙江白鹤滩水电站地下厂房顶拱第一层及后续边墙开挖支护咨询材料[R]. 杭州：中国水电设计集团华东勘测设计研究有限公司，2014.(ZHANG Chunsheng. First floor and following side wall excavation and support consulting report of Baihetan hydropower station in Jin Sha River[R]. Hangzhou：PowerChina Huadong Engineering Corporation Limited，2014.(in Chinese))

[22] 冯夏庭，江权. 金沙江白鹤滩水电站大型地下厂房洞室群施工期稳定性动态反馈分析研究阶段报告一[R]. 武汉：中国科学院武汉岩土力学研究所，2014.(FENG Xiating，JIANG Quan. First periodic report of dynamic feedback analysis of surrounding rock stability during construction period of Baihetan hydropower station[R]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2014.(in Chinese))

[23] 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))

[24] 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))

[25] 张倬元，王士天，王兰生，等. 工程地质分析原理[M] 北京：地质出版社 2013：7(ZHANG Zhuoyuan，WANG Shitian，WANG Lansheng，et al. Principle of engineering geology[M]. Beijing：Geological Publishing House，2013：7.(in Chinese))

[26] 郑颖人，朱合华，方正昌，等. 地下工程围岩稳定分析与设计理论[M]. 北京：人民交通出版社，2012：15–16(ZHENG Yingren，ZHU Hehua，FANG Zhengchang，et al. The stability analysis and design theory of surrounding rock of underground engineering[M]. Beijing：China Communications Press，2012：15–16.(in Chinese))

[27] 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))

[28] 徐鼎平，冯夏庭，崔玉军，等. 白鹤滩水电站层间错动带的剪切特性[J]. 岩石力学与工程学报，2012，31(增1)：2 692–2 703.(XU Dingping，FENG Xiating，CUI Yujun，et al. Shear behaviors of interlayer staggered zone at BaiHetan hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.1)：2 692–2 703.(in Chinese))

[29]