2002, Volume 4, Issue 11
Strategic Study of CAE >> 2002, Volume 4, Issue 11
Application of New Technology in Underground Engineering
Yunnan Lancang River Hydropower Development Co. Ltd. , Kunming 650011, China
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Abstract
Although the PD value of high-pressure manifold in Guangzhou Pumped-storage Project reaches 58 000 kN.m, the reinforcement concrete manifold is applied in the project instead of the conventional steel manifold. The design principle for such kind of manifold is based on bearing the water pressure mainly by the surrounding rock. Measures such as blasting control, concrete quality control and high-pressure grouting have been taken in construction to achieve the design requirement. The practice proves that this kind of manifold is reliable in performance, efficient in cost and excellent in benefit. Slipforming technology used in the concrete lining construction of high-pressure long inclined-shafts becomes the tough point, and no successful experience was available from both home and abroad at that time. Successful performance has been achieved in inclined-shaft construction of Guangzhou Pumped-storage Project by improving and bettering a set of interval inclined-shaft slipform imported. The self-innovated and patented XHM-7 inclined-shaft slipform equipment used in the long inclined-shaft construction of Tianhuangping Pumped-storage Project has realized the consecutive rising of the concrete lining in the inclined-shaft, which shows the advantages of novel structure, reliability, faster concreting and lower cost of the equipment. The successful application of the two above-mentioned new technologies will provide useful experiences to the promotion and application in the similar future projects.
Keywords
hydropower ; underground engineering ; manifold ; inclined-shaft ; new technology
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