Hydro-junction system based on conditions of high water head and large cutting depth

The invention provides a hydro-junction system based on the conditions of high water head and large cutting depth. The hydro-junction system comprises a water inlet in a gravity dam; a stoplog gate and a water diversion and power generation pipeline bulkhead gate are installed on the water inlet side by side in the front-back direction and controlled to be opened and closed through a first portal crane and a second portal crane on the top correspondingly. The system can effectively solve the problems that for a water conservancy and hydropower hub project with the large reservoir capacity, the reservoir water depth, the low dead water level, the vertical distribution of the water temperature in the reservoir, the high surface temperature and the low bottom temperature, due to functional requirements, a layered water taking power generation water inlet and a layered water taking irrigation water supply water inlet are independently designed, and consequently the axis of a head hub dam is increased; the problem