我国水利资源丰富,居世界第一位,而已开发的只有百分之几,特别是西南地区,水利资源占全国的7O%,已开发的就更少。该地区的河流大多河谷较窄,落差大,水流湍急,适合布置地下式水电站。因此,如何经济、合理、安全地修建水电地下洞室工程,成为今后水电建设能否迅速发展的战略性问题之一。在我国,直至80年代初,多数水电地下工程设计仍以普氏理论为基础,即在设计中设计 China is rich in water conservancy resources and ranks first in the world. Only a few percent have been developed, especially in the southwestern region, where water resources account for 70% of the country’s total and fewer have been developed. Most of the river valley in the region is narrow, large drop, fast-flowing, suitable for underground hydropower station layout. Therefore, how to construct the hydropower underground cavern economically, reasonably and safely has become one of the strategic issues in the future whether hydropower construction can develop rapidly. In our country until the early 1980s, most underground hydropower projects are still based on Platts theory, that is, design in the design