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On-line Access: 2022-07-19

Received: 2022-01-30

Revision Accepted: 2022-04-24

Crosschecked: 2022-07-19

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Zhi-yun DENG

https://orcid.org/0000-0001-9851-6125

Peng LIN

https://orcid.org/0000-0003-1338-2514

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Journal of Zhejiang University SCIENCE A 2022 Vol.23 No.7 P.543-563

http://doi.org/10.1631/jzus.A2200060


Coordinated deformation control technologies for the high sidewall–bottom transfixion zone of large underground hydro-powerhouses


Author(s):  Qi-xiang FAN, Zhi-yun DENG, Peng LIN, Guo LI, Ji-lin FU, Wei HE

Affiliation(s):  China Huaneng Group Co., Ltd., Beijing 100031, China; more

Corresponding email(s):   qx_fan@chng.com.cn

Key Words:  Underground powerhouse, Coordinated deformation mechanism, High sidewall–, bottom transfixion (HSBT), Cavern group, Control technology


Qi-xiang FAN, Zhi-yun DENG, Peng LIN, Guo LI, Ji-lin FU, Wei HE. Coordinated deformation control technologies for the high sidewall–bottom transfixion zone of large underground hydro-powerhouses[J]. Journal of Zhejiang University Science A, 2022, 23(7): 543-563.

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author="Qi-xiang FAN, Zhi-yun DENG, Peng LIN, Guo LI, Ji-lin FU, Wei HE",
journal="Journal of Zhejiang University Science A",
volume="23",
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pages="543-563",
year="2022",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2200060"
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%T Coordinated deformation control technologies for the high sidewall–bottom transfixion zone of large underground hydro-powerhouses
%A Qi-xiang FAN
%A Zhi-yun DENG
%A Peng LIN
%A Guo LI
%A Ji-lin FU
%A Wei HE
%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2200060

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T1 - Coordinated deformation control technologies for the high sidewall–bottom transfixion zone of large underground hydro-powerhouses
A1 - Qi-xiang FAN
A1 - Zhi-yun DENG
A1 - Peng LIN
A1 - Guo LI
A1 - Ji-lin FU
A1 - Wei HE
J0 - Journal of Zhejiang University Science A
VL - 23
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SP - 543
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%@ 1673-565X
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A2200060


Abstract: 
It is imperative to understand the spatial and temporal coordination deformation mechanism and develop targeted deformation control technologies for high sidewall–;bottom transfixion (HSBT) zones to guarantee the stability of rock surrounding underground hydro-powerhouses under complex geological conditions. In this study, the spatial and temporal coordinated deformation control of HSBT zones was addressed from the aspects of the deformation mechanism, failure characteristics, and control requirements, and some coordinated deformation control technologies were proposed. On this basis, a case study was conducted on the deformation control of the HSBT zone of the underground powerhouse at the Wudongde hydropower station, China. The results showed that the relationship between excavation and support, and the mismatch of deformation and support of the surrounding rock mass in the HSBT zone of underground caverns with a large span and high in-situ stress can be appropriately handled. The solution requires proper excavation and construction procedures, fine blasting control, composite and timely support, and real-time monitoring and dynamic feedback. The technologies proposed in this study will ensure the safe, high-quality, and orderly construction of the Baihetan and Wudongde underground caverns, and can be applied to other similar projects.

大型地下厂房高边墙及下部贯通区变形协调控制研究

作者:樊启祥1,2,邓志云3,林鹏3,李果1,2,付继林2,何炜2
机构:1中国华能集团有限公司,中国北京,100031;2中国长江三峡集团有限公司,中国北京,100038;3清华大学水利水电工程系,中国北京,100084
目的:揭示大型地下厂房高边墙及下部贯通区洞群变形协调控制机制,分析并预测全过程围岩变形力学行为,以有效控制大跨度、高地应力条件下大型地下厂房高边墙及下部贯通区洞群围岩变形协调,实现大型地下厂房安全优质有序的建设。
创新点:1.揭示了多种因素联合作用下的地下厂房高边墙及下部贯通区洞群变形时空协调控制机理;2.提出了大型地下厂房高边墙及下部贯通区洞群变形协调控制方法与技术。
方法:1.通过理论分析、数值模拟及案例分析等方法,揭示地下厂房高边墙及下部贯通区洞群围岩变形联动特征及机理;2.通过数值仿真、现场监测及案例分析,应用大型地下厂房高边墙及下部贯通区洞群变形协调控制方法与技术于乌东德大型地下厂房工程,验证所提方法的可行性和有效性。
结论:1.岩体由高围压环境急剧转变为低围压和高应力差环境的力学机制以及工程开挖引致围岩扰动破坏的空间效应是形成大型地下洞室边墙显著时效变形的主要作用机制;2.合理的开挖施工程序、精细爆破控制、复合与及时支护、实时监测和动态反馈等技术是控制复杂地质条件下大型地下洞室群施工开挖围岩稳定的有效手段。

关键词:地下厂房;协调变形机理;高边墙-下部贯通区;洞室群;控制技术

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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