caa a22 4500 605454329 CHVBK 20210128100206.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s10064-014-0704-7 doi (NATIONALLICENCE)springer-10.1007/s10064-014-0704-7 Study on leakage dissolution around the dam foundation of the Qingju Hydropower Station and its engineering influence on the dam [Elektronische Daten] [Zhengjun Zhou, Jiankang Chen, YanLing Li, Peng He, Hai Zhang, Hong Dai, Zhenyu Wu] Leakage dissolution is one of the potential threats to the long-term operating safety of a dam. The aim of this paper is to analyze the characteristics of leakage dissolution around the dam foundation of Qingju Hydropower Station and evaluate its engineering influence based on laboratory testing and in situ monitoring. Comparative analysis of water samples in 20 representative positions shows that the bedrock of the dam foundation has been enduring obvious dissolution under the effects of the groundwater. In situ monitoring data of displacement and leakage during the period from 2005 to 2013 indicates that there has been no excessive deformation, obvious uneven settlement, or concentration leakage in these nineyears, and; therefore, the leakage dissolution of the dam foundation has not resulted in critical danger to the safety of dam so far. However, with an annual amount of gypsum dissolution discharged by the drainpipes of about $$ 1.82 \times 10^{5}\,{\rm kg} $$ 1.82 × 10 5 kg , long-term leakage dissolution may be hazardous, besides the higher content of SO4 2− than normal in the groundwater of the dam foundation caused by leakage dissolution may invoke some crystal corrosion and decrease the durability of the concrete structures. To guarantee the long-term safety of the dam, implementing grouting is proposed to prevent dissolution or slow down the dissolution rate on the basis of real-time monitoring and feedback. Springer-Verlag Berlin Heidelberg, 2014 Qingju Hydropower Station nationallicence Dam foundation nationallicence Leakage dissolution nationallicence Water composition analysis nationallicence In situ monitoring nationallicence Zhou Zhengjun State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut Chen Jiankang State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut Li YanLing State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut He Peng State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut Zhang Hai Huaneng Jialingjiang Hydropower Co., Ltd., Sichuan, China aut Dai Hong College of Light Industry, Textile and Food Engineering, Sichuan University, Chengdu, China aut Wu Zhenyu State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/4(2015-11-01), 1463-1473 1435-9529 74:4<1463 2015 74 10064 https://doi.org/10.1007/s10064-014-0704-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10064-014-0704-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhou Zhengjun State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut NATIONALLICENCE 700 1- Chen Jiankang State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut NATIONALLICENCE 700 1- Li YanLing State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut NATIONALLICENCE 700 1- He Peng State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut NATIONALLICENCE 700 1- Zhang Hai Huaneng Jialingjiang Hydropower Co., Ltd., Sichuan, China aut NATIONALLICENCE 700 1- Dai Hong College of Light Industry, Textile and Food Engineering, Sichuan University, Chengdu, China aut NATIONALLICENCE 700 1- Wu Zhenyu State Key Laboratory of Hydraulic and Mountain River Engineering, School of Water Resources and Hydropower, Sichuan University, Chengdu, China aut NATIONALLICENCE 773 0- Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/4(2015-11-01), 1463-1473 1435-9529 74:4<1463 2015 74 10064