water intake towers;  Work doors;  Prestress

The No. 8 inlet tower of Xiaolangdi was discretely dispersed by using the 21~2 node block unit, and the stress analysis was carried out for four different schemes of the working gate section. The calculation shows that the degree of reduction of tensile stress from scheme I to scheme III is between 4% and 5%, and the scheme II. with the largest degree of tensile stress reduction reaches 10.9%, and scheme II is the optimal prestressed anchor bundle arrangement scheme. However, as far as the prestressing scheme is concerned, the degree of tensile stress reduction is not large, and the effect of using prestressing engineering measures to reduce the tensile stress in the side wall area of the working door section is not obvious, and it is not suitable for the structure of large box-type water intake tower, and it is recommended that the design unit take other engineering measures to solve the problem of two-way tensile stress in the large area of the side wall.