High Pressure Reinforcement Grouting of Surrounding Rock of High Pressure Tunnel under Complex Hydrogeological Condition
详细信息
- 责任者：Liao Pinzhong (Guangdong Hydropower Planning and Design Institute ; Guangzhou 510635 ; China) ; Wu Guorong
- 刊名：Resources Environment & Engineering
- 出版年：2011
- 卷期：25(5)
- 关键词：隧道 ; tunnels ; 围岩压力 ; adjoining rock pressure ; 广东 ; Guangdong Province
- 页码：p.488-491
- 图表：1 illus., 5 refs.
- 分类号：1702
- issnNo：ISSN1671-1211
- isbnNo：CN42-1736/X
摘要
The fault developed in high pressure tunnel of Huizhou pumped storage power station is mainly tensional fault and shear fault with strong permeability.The fault along NE direction and NW/NNW direction forms a complex network with good permeability and complex hydrogeological condition.The excavation diameter of high pressure tunnel is 10 m,the hydrostatic pressure of internal water is 172~627 m.The tunnel adopts advanced design concept with thin lining of crack prevention reinforced concrete and lining thickness is 60 cm.Prevention of major water leakage from high pressure tunnel is the key factor of successful project engineering.The project operates well under systematic high pressure reinforcement grouting,aided with chemical grouting and water filling in main fault and fracture zone.This project set a successful example of using thin lining of crack prevention reinforced concrete in high pressure tunnel under complex hydrogeological condition.
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