Research on the Stability and Main Deformation Failure Mode of the Main Plant in the Left Bank of Baihetan Hydropower Station

DONG Yuan, PEI Xiang-jun, ZHANG Yin

PDF(4583 KB)
China Rural Water and Hydropower ›› 2018 ›› (10) : 96-104.

Research on the Stability and Main Deformation Failure Mode of the Main Plant in the Left Bank of Baihetan Hydropower Station

  • DONG Yuan,PEI Xiang-jun,ZHANG Yin
Author information +
History +

Abstract

The main powerhouse on the left bank of Baihetan Hydropower Station is large in scale,complex in structure and geological conditions,and with a high tectonic stress level. The excavation of the cavern is caused by the failure of the highland stress brittle basalt at the top arch and arch foot,the large deformation of the rock wall rock of the main powerhouse and the stability of the rock mass caused by the C2 block between the weak layer and the fault zone. Based on the rock mechanics test,acoustic emission test and the results of the site geological exploration,the general rule of the main building block is summed up in view of the failure phenomenon of the main building block. In view of the large deformation phenomenon of the rock wall rock in the main building,the field monitoring is combined with the Midas numerical simulation ( Hoek-Brown failure criterion) . The method is analyzed. It is concluded that the deformation of rock wall rock in the main building is closely related to the quality of rock mass and the development degree of fracture structure. In view of the problem of instability and failure of the wall block caused by the excavation of the cavern,the failure rules of the shallow block formed by the upper and lower wall of the wall are obtained by the mechanism analysis and the field investigation.

Key words

cavern excavation / brittle basalt / fragment damage / shear zone / block stability

Cite this article

Download Citations
DONG Yuan, PEI Xiang-jun, ZHANG Yin. Research on the Stability and Main Deformation Failure Mode of the Main Plant in the Left Bank of Baihetan Hydropower Station. China Rural Water and Hydropower. 2018, 0(10): 96-104

References

[1] 冯夏庭,江 权,苏国韶.高应力下硬岩地下工程的稳定性智能分 析与动态优化[J]. 岩石力学与工程学报,2008,27 ( 7) : 1 341 - 1 352. 

[2] 孟国涛,樊义林,江亚丽,等.白鹤滩水电站巨型地下洞室群关键 岩石力学问题与工程对策研究[J].岩石力学与工程学报,2016, 35( 12) : 2 549-2 560. 

[3] 刘国锋,冯夏庭,江 权,等.白鹤滩大型地下厂房开挖围岩片帮 破坏特征、规律及机制研究[J]. 岩石力学与工程学报,2016, ( 5) : 865-878. 

[4] 卢 波,丁秀丽,邬爱清,等.高应力硬岩地区岩体结构对地下洞 室围岩稳定性的控制效应研究[J]. 岩石力学与工程学报,2012, 31( S2) : 3 831-3 846. [

5] 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) : 74-84. [6] 段淑倩,冯夏庭,江 权,等.高地应力下白鹤滩地下洞室群含错 动带岩体破坏模式及机制研究[J]. 岩石力学与工程学报,2017, 36( 04) : 852-864. 

[7] 张为民.金沙江白鹤滩水电站可行性研究阶段-坝线选择工程地 质勘察报告初步成果[R].杭州: 中国水电顾问集团华东勘测设 计研究院,2007.12. 

[8] 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: 浙江中科依泰斯卡岩石工 程研发有限公司,2014. 

[9] 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. 

[10] GB50021-94,岩土工程勘察规范[S]. 

[11] 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,( 1) : 23-35. 

[12] 张镜剑,傅冰骏,岩爆及其判据和防治[J]. 岩石力学与工程学 报,2008,( 10) : 2 034-2 042. 

[13] MARTIN C D,KAISER P K,CHRISTIANANSSON R.Stress,instability and design of underground excavations[J]. International Journal of Rock Mechanics and Mining Sciences,2003,40( 7) : 1 027- 1 047. 

[14] MARTIN C D,MAYBEE W G.The strength of hard-rock pillars[J]. International Journal of Rock Mechanics and Mining Sciences,2000, 37( 8) : 1 239-1 246. 

[15] Itasca Consulting Group Inc. FLAC3D( Fast lagrangian analysis of continua in 3 dimensions) user manual version 5.01[M].Minneapolis: Itasca Consulting Group Inc,2013: 180-189. 

[16] 魏云杰.中国西南水电工程区峨眉山玄武岩岩体结构特性及其 工程应用研究[D]. 成都: 成都理工大学,2007. [17] 李帅军,冯夏庭,徐鼎平,等.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, ( S2) : 3 947-3 959.

[18] 黄润秋.中国西南岩石高边坡的主要特征及演化[J].地球科学 进展,2005,20( 3) : 292-297. 

[19] 黄润秋,黄达.高地应力条件下卸荷速率对锦屏大理岩力学特性 影响规律试验研究[J]. 岩石力学与工程学报,2010,( 1) : 21- 33.

20] 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,( 11) : 2 291-2 300. 

[21] 黄 达,黄润秋. 卸荷条件下裂隙岩体变形破坏及裂纹扩展演化 的物理模型试验[J]. 岩石力学与工程学报,2010,29( 3) : 502- 512.

PDF(4583 KB)

Accesses

Citation

Detail

Sections
Recommended

/