Study On The Route Of Divering Water From The Yarlung Zangbo River To Xinjiang And The Construction Technology Of Its Super-Long Tunel(Inclined Shaft)

In order to solve the problem of water shortage in Xinjiang,Plans from the Yarlung Zangbo River water diversion to Xinjiang 7×10~8m~3 per year.The water diversion route,the layout of the main engineering buildings and the total project budget are studied and discussed.The length of the tunnel is about 911 km,and the total length of the water transportation channel is about 2554 km.The proportion is small,and a reasonable amount of water is reserved for downstream.In the whole water diversion project,the construction of water conveyance tunnel is the control project.The tunnel passes through the vast area of northern Tibet.The along the line of geological conditions are very complex.Combining the construction technology characteristics of different types of TBM,the construction of the Yarlung Zangbo River water transfer to the Xinjiang water conveyance tunnel is constructed with double shield TBM for construction.In comparison with various geological detection techniques,TRT7000 technology is selected for geological forecast,which is more applicable and widely used.Each vertical wellhead is installed in the tunnel for ventilation.The ventilation distance of each main fan is about 12 km.After installing a mobile continuous belt conveyor in the main hole,the fixed belt conveyor is installed with a fixed belt conveyor for transporting stone slag.The construction of deep inclined shaft in the tail section of long distance tunnel is used to generate electricity.The slope angle design of inclined shaft is studied,and the multiple regression analysis method is used to establish the prediction model for the critical angle of the guide well.In the course of construction.The excavation satisfies the deviation and the roughness of the shaft wall,combining with the actual blocking examples,and obtains the expected calculation public formula.The Yarlung Zangbo River water diversion project.In the construction of deep inclined excavation,it is necessary to meet the requirements of uniform diameter of stone slag after blasting,guaranteed water content of stone slag after blasting,small roughness of excavation guide wall and not too large length of slag accumulation in well,which can be divided into five sections of deep inclined shaft,the length of each inclined shaft is about 227 m,and each inclined shaft is connected by a flat section.and each section angle is designed to be 62 degrees and can meet safety construction needs.