The excavation and support construction of giant underground caverns in large-scale hydropower projects is a key route and a concentrated area of technical difficulties in engineering construction. Improving the excavation and support methods and construction machinery of underground power plants based on the actual geological conditions and working environment on site is an important guarantee for ensuring the safety, quality, efficiency, and green construction of underground caverns. This paper carried out innovative research, development and tackling of key construction methods and technical problems in the construction process of large underground caverns of Wudongde Hydropower Station, which included the excavation and construction of large-span high sidewall, excavation and construction of super large section surge chamber, excavation of small diameter slag chute shaft, support of super large section caverns in unfavorable geological sections, pipe pulling contact grouting construction, penstock assembly in the tunnel, concrete slip form construction of porous deep shaft and large outlet shaft construction, etc. Common key innovative construction methods and technologies from aspects such as process type, fine excavation, support, and equipment innovation technology were summarized. The research results could provide the reference for similar engineering construction.
Yang Zongli
,
Ding Peng
,
An Ruinan
,
Jian Chonglin
,
Peng Bo
. Innovative Construction Method and Technology for Underground Caverns of Wudongde Hydropower Station[J]. Chinese Journal of Underground Space and Engineering, 2024
, 20(6)
: 2045
-2053
.
DOI: 10.20174/j.JUSE.2024.06.30
[1] Fan Q X, Deng Z Y, Lin P,et al. Coordinated deformation control technologies of the high sidewall-bottom transfixion zone of large underground hydro-powerhouses[J]. Journal of Zhejiang University-Sciench A, 2022, 23(7): 543-563.
[2] 樊启祥, 林鹏, 魏鹏程, 等. 智能建造闭环控制理论[J]. 清华大学学报(自然科学版), 2021, 61(7): 660-670. (Fan Qixiang, Lin Peng, Wei Pengcheng, et al. Closed gloop control theory of intelligent construction[J]. Journal of Tsinghua University (Science and Technology Edition), 2021, 61(7): 660-670. (in Chinese))
[3] Zhang J C, Xu W Y, Wang H L, et al. Testing and modeling of the mechanical behavior of dolomite in the Wudongde Hydropower Plant[J]. Geomechanics and Geoengineering, 2016, 11(4): 270-280.
[4] Wang G J, Xie M W, Chai X Q, et al. D-InSAR-based landslide location and monitoring at Wudongde Hydropower Reservoir in China[J]. Environmental Earth Sciences, 2013, 69: 2763-2777.
[5] 李昂, 戴峰, 徐奴文, 等. 乌东德水电站右岸地下厂房开挖围岩破坏模式及形成机制研究[J]. 岩石力学与工程学报, 2017, 36(4): 781-793. (Li Ang, Dai Feng, Xu Nuwen, et al. Failure mechanism and mode of surrounding rock of underground powerhouse at the right bank of Wudongde Hydropower Station subjected to excavation[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(4): 781-793. (in Chinese))
[6] Peng H Y, Lin P, Yang N, et al. Real time thermal field analysis on Wudongde super high arch dam during construction[J]. Global Energy Interconnection, 2019, 2(3): 264-269.
[7] 苏国韶, 冯夏庭, 江权, 等. 高地应力下大型地下洞室群开挖顺序与支护参数组合优化的智能方法[J]. 岩石力学与工程学报, 2007, 26(增1): 2800-2808. (Su Guozhao, Feng Xiating, Jia Quan, et al. Intelligent method of combinatorial optimization of excavation sequence and support parameters for large underground caverns under condition of high geostress[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(Supp.1): 2800-2808. (in Chinese))
[8] 李俊, 魏宝龙, 焦凯, 等. 大型地下洞室群开挖支护施工技术研究与实践——以杨房沟水电站为例[J]. 人民长江, 2018, 49(24): 76-82. (Li Jun, Wei Baolong, Jiao Kai, et al. Research and practice of excavation and support technology for large underground caverns: case of Yangfanggou Hydropower Station[J]. Yangtze River, 2018, 49(24): 76-82. (in Chinese))
[9] 董家兴, 徐光黎, 李志鹏, 等. 高地应力条件下大型地下洞室群围岩失稳模式分类及调控对策[J]. 岩石力学与工程学报, 2014, 33(11): 2161-2170. (Dong Jiaxing, Xu Guangli, Li Zhipeng, et al. Classification of failure modes and controlling measures for surrounding rock of large-scale caverns with high geostress[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(11): 2161-2170. (in Chinese))
[10] 陈雪万, 王强. 白鹤滩水电站竖井滑模混凝土施工测量控制研究[J]. 中国水利, 2019(18): 74-76.(Chen Xuewan, Wang Qiang. Measurement and quality control for slip-form technology in shaft concrete construction of Baihetan Hydropower Station[J]. China Water Resources, 2019(18): 74-76. (in Chinese))
[11] Lin P, Zhou Y N, Liu H Y, et al. Reinforcement design and stability analysis for large-span tailrace bifurcated tunnels with irregular geometry[J]. Tunnelling and Underground Space Technology, 2013, 38(9):189-204.
[12] 陈卫忠, 李术才, 朱维申, 等. 急倾斜层状岩体中巨型地下洞室群开挖施工理论与优化研究[J]. 岩石力学与工程学报, 2004, 23(19): 3281-3287. (Chen Weizhong, Li Shucai, Zhu Weishen, et al. Excavation and optimization theory for giant underground caverns constructed in high dipping laminar strata[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(19): 3281-3287. (in Chinese))
[13] 袁乾博, 杨鹏, 王涛, 等. 乌东德水电站左岸地下主厂房围岩支护效果分析[J]. 三峡大学学报(自然科学版), 2020, 42(1): 24-29,35. (Yuan Qianbo, Yang Peng, Wang Tao, et al. Analysis on the effect of surrounding rock support for the main underground powerhouse on the left bank of Wudongde Hydropower Station[J]. Journal of China Three Gorges University (Natural Science Edition), 2020, 42(1): 24-29,35. (in Chinese))
[14] 王克忠, 李仲奎, 王玉培, 等. 大型地下洞室断层破碎带变形特征及强柔性支护机制研究[J]. 岩石力学与工程学报, 2013, 32(12): 2455-2462.(Wang Kezhong, Li Zhongkui, Wang Yupei, et al. Study of strong flexible supporting mechanism and deformation characteristics for fracture zone in large undergrond caverns[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(12): 2455-2462. (in Chinese))
[15] 刘健华, 李俊, 焦凯, 等. 水电站大型竖井施工安全风险控制措施研究[J]. 人民长江, 2018, 49(24): 63-66.(Liu Jianghua, Li Jun, Jiao Kai, et al. Study on safety risk control measures for large shaft construction of hydropower station[J]. Yangtze River, 2018, 49(24): 63-66. (in Chinese))
[16] Lin P, Liu H Y, Zhou W Y. Experimental study on failure behavior of deep tunnels under high in-situ stresses[J]. Tunnelling and Underground Space Technology, 2015, 46: 28-45.
