高级搜索
  • 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引（EI）收录期刊
  • Scopus数据库收录期刊

拱坝建基面开挖过程中不平衡力变化及处理效果研究

程立, 刘耀儒, 陶灼夫, 杨强, 徐建荣, 何明杰, 张伟狄

程立, 刘耀儒, 陶灼夫, 杨强, 徐建荣, 何明杰, 张伟狄. 拱坝建基面开挖过程中不平衡力变化及处理效果研究[J]. 岩土工程学报, 2017, 39(9): 1670-1679. DOI: 10.11779/CJGE201709015
引用本文: 程立, 刘耀儒, 陶灼夫, 杨强, 徐建荣, 何明杰, 张伟狄. 拱坝建基面开挖过程中不平衡力变化及处理效果研究[J]. 岩土工程学报, 2017, 39(9): 1670-1679. DOI: 10.11779/CJGE201709015
shu
CHENG Li, LIU Yao-ru, TAO Zhuo-fu, YANG Qiang, XU Jian-rong, HE Ming-jie, ZHANG Wei-di. Variation of unbalanced force during excavation of arch dam base surface and treatment effects[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(9): 1670-1679. DOI: 10.11779/CJGE201709015
Citation: CHENG Li, LIU Yao-ru, TAO Zhuo-fu, YANG Qiang, XU Jian-rong, HE Ming-jie, ZHANG Wei-di. Variation of unbalanced force during excavation of arch dam base surface and treatment effects[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(9): 1670-1679. DOI: 10.11779/CJGE201709015
shu

拱坝建基面开挖过程中不平衡力变化及处理效果研究  English Version

  • 1. 清华大学水沙科学与水利水电工程国家重点实验室,北京 100084;
    2. 水电水利规划设计总院,北京 100120;
    3. 中国电建集团华东勘测设计研究院有限公司,浙江 杭州 310014

基金项目: 国家自然科学基金面上项目（51479097,11172150）; 水沙科学与水利水电工程国家重点实验室科研项目（2016-KY-2）
详细信息
    作者简介:

    程 立(1990- ),男,博士研究生,主要从事水工结构与岩石力学的科研。E-mail：l-cheng12@mails. tsinghua.edu.com。

    通讯作者:

    刘耀儒，E-mail：liuyaoru@tsinghua.edu.cn

  • 中图分类号: TU43

Variation of unbalanced force during excavation of arch dam base surface and treatment effects

  • 1. State Key Laboratory of Hydroscience and Hydraulic Engineering, Tsinghua University, Beijing 100084, China;
    2. China Renewable Energy Engineering Institute, Beijing 100120, China;
    3. Power China Huadong Engineering Corporation, Hangzhou 310014, China

摘要

    摘要
  • 摘要: 300 m级高拱坝建基面开挖造成的岩体卸荷松弛对高拱坝的整体稳定性影响巨大。白鹤滩拱坝左岸建基面开挖至628 m高程时也出现了卸荷松弛、结构面错动等现象。基于变形加固理论,提出了使用不平衡力作为坝基岩体松弛卸荷的定量判据,阐释了不平衡力分析岩体开裂与坝基卸荷时效松弛的理论基础,通过试验和数值模拟的对比说明了不平衡力应用于卸荷松弛判据的准确性。使用三维非线性有限元程序TFINE,对白鹤滩拱坝原始地形和开挖过程进行精细模拟,分析了开挖过程中建基面基础（尤其是结构面）的卸荷松弛演变过程。分别对无基础处理、预留保护层和施加锚索情况下的开挖卸荷松弛进行了研究分析。模拟结果表明,在开挖到630 m高程时,在结构面交汇处和坡面出露段附近结构面的不平衡力与屈服区出现集中情况,这与观测到的建基面卸荷松弛以及结构面出现错动裂缝等现象符合;继续开挖过程中,LS331、LS3318不平衡力较大,相对比较危险。另外,坝体底部的陡坎开挖成型时,陡坎底部的不平衡力增加较明显,需减缓陡坎坡度。预留保护层和建基面锚固对控制松弛卸荷作用较小。
    Abstract: The excavation-induced relaxation of dam base surface can enormously affect the global stability of 300 m level-high arch dams. Unfortunately, for Baihetan arch dam, serious excavation-induced relaxation and structural plane dislocation are discovered in the left slope when the dam base surface is excavated to the elevation of 628 m. Based on the deformation reinforcement theory, the unbalanced force is used as a quantitative index to evaluate the degree of excavation-induced relaxation of dam base surface. Then, the theoretical basis of rock cracking and relaxation based on the unbalanced force can be analyzed. Simultaneously, the accuracy of using the unbalanced force to evaluate excavation-induced relaxation is illustrated by experiments and numerical simulations. Employing the 3D nonlinear FEM programme TFINE, the excavation-induced relaxation evolution process of the arch dam's left base surface of Baihetan, particularly the shear moving of the structural plane, is elaborated. Three excavation situations are investigated respectively: excavation without foundation treatments, excavation with reserved protective layer and excavation with anchoring. The simulated results show that the unbalanced forces and yield zones of structural planes are concentrated near the intersection zones and outcrops of structural planes, which fit the observations of relaxation of dam base surface and dislocation of structural planes well. LS331 and LS3318 are more dangerous than the other structural planes owing to larger unbalanced force during excavation. The unbalanced force near the scarp bottom obviously increases during excavation of the scarp, so the gradient of the scarp should be slackened. Relatively speaking, reserving the protective layer and setting anchoring have little influence on controlling the excavation-induced relaxation.
    • HTML全文
    • 参考文献(23)
  • [1] 伍法权, 刘 彤, 汤献良, 等. 坝基岩体开挖卸荷与分带研究——以小湾水电站坝基岩体开挖为例[J]. 岩石力学与工程学报, 2009, 28(6): 1091-1098. (WU Fa-quan, LIU Tong, TANG Xian-liang, et al. Research on unloading and zonation of rock mass dam foundation excavation—a case study of Xiaowan hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(6): 1091-1098. (in Chinese))
    [2] 王瑞红, 李建林, 蒋昱州, 等. 考虑岩体开挖卸荷边坡岩体质量评价[J]. 岩土力学, 2008, 29(10): 2741-2746. (WANG Rui-hong, LI Jian-lin, JIANG Yu-zhou, et al. Quality evaluation of unloaded slope rock mass[J]. Rock and Soil Mechanics, 2008, 29(10): 2741-2746. (in Chinese))
    [3] 尹健民, 艾 凯, 刘元坤, 等. 钻孔弹模法评价小湾水电站坝基岩体卸荷特征[J]. 长江科学院院报, 2006, 23(4): 44-46. (YIN Jian-min, AI Kai, LIU Yuan-kun, et al. Unloading characteristic evaluation of Xiaowan Hydropower Station foundation rock mass by borehole elasticity modulus method[J]. Journal of Yangtze River Scientific Research Institute, 2006, 23(4): 44-46. (in Chinese))
    [4] SATO T, KIKUCHI T, SUGIHARA K. In-situ experiments on an excavation disturbed zone induced by mechanical excavation in Neogene sedimentary rock at Tono mine, central Japan[J]. Engineering Geology, 2000, 56(1): 97-108.
    [5] 冯学敏, 陈胜宏, 李文纲. 岩石高边坡开挖卸荷松弛准则研究与工程应用[J]. 岩土力学, 2009, 30(增刊2): 452-456. (FENG Xue-min, CHEN Sheng-hong, LI Wen-gang. Research on unloading relaxation criterion of high rocky slope excavation and its engineering application[J]. Rock and Soil Mechanics, 2009, 30(S2): 452-456. (in Chinese))
    [6] 张石虎, 傅少君, 陈胜宏. 坝基岩体开挖松弛效应分析与锚固效果评估研究[J]. 岩石力学与工程学报, 2014, 33(3): 514-522. (ZHANG Shi-hu, FU Shao-jun, CHEN Sheng-hong, et al. Research analysis of excavation-induced relaxation of rock foundation and evaluation of anchor effect[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(3): 514-522. (in Chinese))
    [7] 周 华, 王国进, 傅少君, 等. 小湾拱坝坝基开挖卸荷松弛效应的有限元分析[J]. 岩土力学, 2009, 30(4): 1175-1180. (ZHOU Hua, WANG Guo-jin, FU Shao-jun, et al. Finite element analysis of foundation unloading and relaxation effects of Xiaowan arch dam[J]. Rock and Soil Mechanics, 2009, 30(4): 1175-1180. (in Chinese))
    [8] 杨宝全, 张 林, 胡成秋, 等. 复杂岩基上高拱坝坝基坝肩浅层卸荷影响与稳定性研究[J]. 四川大学学报 (工程科学版), 2011, 43(5): 71-76. (YANG Bao-quan, ZHANG Lin, HU Cheng-qiu, et al. Study on influence of dam foundation shallow unloading and stability of high arch dam with complicated rock foundation[J]. Journal of Sichuan University (Engineering Science Edition), 2011, 43(5): 71-76. (in Chinese))
    [9] 江 权, 冯夏庭, 樊义林, 等. 柱状节理玄武岩各向异性特性的调查与试验研究[J]. 岩石力学与工程学报, 2013, 32(12): 2527-2535. (JIANG Quan, FENG Xia-ting, FAN Yi-lin, et al. Survey and laboratory study of anisotropic properties for columnar jointed basaltic rock mass[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(12): 2527-2535. (in Chinese))
    [10] 闫东旭, 徐卫亚, 王 伟, 等. 柱状节理岩体宏观等效弹性模量尺寸效应研究[J]. 岩土工程学报, 2012, 34(2): 243-250. (YAN Dong-xu, XU Wei-ya, WANG Wei, et al. Research of size effect on equivalent elastic modulus of columnar jointed rock mass[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(2): 243-250. (in Chinese))
    [11] 金长宇, 冯夏庭, 张春生. 白鹤滩水电站初始地应力场研究分析[J]. 岩土力学, 2010, 31(3): 845-850. (JING Chang-yu, FANG Xia-ting, ZHANG Chun-sheng. Research on initial stress field of Baihetan hydropower station[J]. Rock and Soil Mechanics, 2010, 31(3): 845-850. (in Chinese))
    [12] 杨 强, 冷旷代, 刘耀儒. 变形加固理论的力学基础与工程意义[J]. 岩土力学, 2011, 32(1): 1-8. (YANG Qiang, LENG Kuang-dai, LIU Yao-ru. Mechanical basis and engineering significance of deformation reinforcement theory[J]. Rock and Soil Mechanics, 2011, 32(1): 1-8. (in Chinese))
    [13] DHONDT G. Automatic 3-D mode I crack propagation calculations with finite elements[J]. International Journal for Numerical Methods in Engineering, 1998, 41(4): 739-757.
    [14] BAZANT Z P, CEDOLIN L. Blunt crack band propagation in finite element analysis[J]. Journal of the Engineering Mechanics Division, 1979, 105(2): 297-315.
    [15] SIMO J C, KENNEDY J G, GOVINDJEE S. Non-smooth multisurface plasticity and viscoplasticity loading/unloading conditions and numerical algorithms[J]. International Journal for Numerical Methods in Engineering, 1988, 26(10): 2161-2185.
    [16] 杨 强, 陈 新, 周维垣. 基于 DP 准则的三维弹塑性有限元增量计算的有效算法[J]. 岩土工程学报, 2002, 24(1): 16-20. (YANG Qiang, CHEN Xin, ZHOU Wei-yuan. A practical 3D elastio-plastic incremental method in FEM based on D-P yield criteria[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(1): 16-20. (in Chinese))
    [17] PERZYNA P. Fundamental problems in viseoplasticity[J]. Advances in Applied Mechanics, 1966, 9: 243-377.
    [18] DUVAUT G, LIONS J L. Inequalities in mechanics and physics[M]. Berlin: Springer Berlin Heidelberg, 1976.
    [19] 冷旷代. 岩体结构非平衡演化稳定与控制理论基础研究[D]. 北京: 清华大学, 2013. (LENG Kuang-dai. Research on the fundamentals of stability and control of non-equilibrium evolution of rock mass structures[D]. Beijing: Tsinghua University, 2013. (in Chinese))
    [20] LEMAITRE J, CHABOCHE J L. Mechanics of solid materials[M]. Cambridge: Cambridge University Press, 1994.
    [21] 张 泷, 刘耀儒, 杨 强, 等. 杨房沟拱坝整体稳定性的三维非线性有限元分析与地质力学模型试验研究[J]. 岩土工程学报, 2013, 35(1): 239-246. (ZHANG Long, LIU Yao-ru, YANG Qiang, et al. Global stability of Yangfanggou arch dam by 3D nonlinear FEM analysis and geomechanical model tests[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(1): 239-246. (in Chinese))
    [22] ZIENKIEWICZ O C, CORMEAU I C. Visco-plasticity and creep in elastic solids—a unified numerical solution approach[J]. International Journal for Numerical Methods in Engineering, 1974, 8(4): 821-845.
    [23] YANG Q, LIU Y R, FENG X Q, et al. Time-independent plasticity related to critical point of free energy function and functional[J]. Journal of Engineering Materials & Technology, 2014, 136(2): 162-175.
    • 相关文章
    • 施引文献
    • 资源附件(0)
计量
  • 文章访问数:  515
  • HTML全文浏览量:  2
  • PDF下载量:  257
  • 被引次数: 0
出版历程
  • 收稿日期:  2016-05-29
  • 发布日期:  2017-09-24

目录

摘要
HTML全文
    参考文献(23)
    相关文章
    施引文献
    资源附件(0)

    /

    返回文章
    返回
    版权所有 © 2010水利部交通部国家能源局南京水利科学研究院 苏ICP备05007122号-11公安联网备案号：32010602011255
    编辑部地址：南京市虎踞关34号《岩土工程学报》编辑部邮编：210024电话：025-85829534，85829556E-mail: ge@nhri.cn