Making the joints in concrete dams monolithic

Abstract

The constructional features of arch dams, together with the desire to reduce both the time and the cost of the work required to achieve a monolithic structure, demand increases in the lift height and cementation cross section.In order to prescribe a sound figure for the optimum lift height, which is limited by the carrying capacity of the nonmonolithic dam columns and sections, it is necessary to know the general pattern of grout flow in the joint for various types of grouting systems. Hydraulic investigations* of the tubular grouting system with point outlets, which was employed in the construction of the dams for the Bratsk and Krasnoyarsk hydroelectric stations, showed that, for a lift height of even 9 m and a cross-sectional area of 135 m z (Fig.